CN115033116B - Keyboard, display system and control method of display equipment - Google Patents

Keyboard, display system and control method of display equipment Download PDF

Info

Publication number
CN115033116B
CN115033116B CN202210955027.0A CN202210955027A CN115033116B CN 115033116 B CN115033116 B CN 115033116B CN 202210955027 A CN202210955027 A CN 202210955027A CN 115033116 B CN115033116 B CN 115033116B
Authority
CN
China
Prior art keywords
keyboard
signal
touch screen
preset
capacitance value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210955027.0A
Other languages
Chinese (zh)
Other versions
CN115033116A (en
Inventor
张伟
齐骞
张友军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honor Device Co Ltd
Original Assignee
Honor Device Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honor Device Co Ltd filed Critical Honor Device Co Ltd
Priority to CN202210955027.0A priority Critical patent/CN115033116B/en
Publication of CN115033116A publication Critical patent/CN115033116A/en
Application granted granted Critical
Publication of CN115033116B publication Critical patent/CN115033116B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/0227—Cooperation and interconnection of the input arrangement with other functional units of a computer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

The application provides a keyboard, a display system and a control method of display equipment, relates to the technical field of display, and is used for solving the problems of reducing the cost and design difficulty of the display equipment when realizing cover opening and closing detection. The keyboard comprises a keyboard main body, a supporting piece, a first transmitting electrode and a signal generating circuit. The support member is rotatably connected with the keyboard main body. The first transmitting electrode is arranged in the keyboard main body, the signal generating circuit is electrically connected with the first transmitting electrode, the signal generating circuit is used for generating a first alternating signal, and the first transmitting electrode is used for receiving the first alternating signal and transmitting a second alternating signal. The keyboard is used for protecting the display equipment and is convenient for a user to output data and instructions.

Description

Keyboard, display system and control method of display equipment
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a keyboard, a display system, and a control method of a display device.
Background
Currently, a user of a display device such as a tablet computer, a mobile phone and the like can select a matched leather sheath keyboard to realize typing input, and the display device can be protected by utilizing the leather sheath keyboard to prevent collision and scratch. In order to achieve the purpose of energy saving, when the leather sheath keyboard is closed, the screen of the display device is turned off to enter a dormant state so as to save power consumption; when the leather sheath keyboard is uncapped, the screen automatically lights up and wakes up to realize the display function.
In order to carry out cover closing and cover opening detection on the leather sheath keyboard, a Hall sensor is usually arranged in display equipment, a magnet is placed in the leather sheath keyboard, and the purpose of cover closing and cover opening detection is achieved by the fact that the Hall sensor senses the approaching or the separating of the magnet. However, in this solution, the hall sensor needs to be placed in the display device, and not all users have the use requirement of the leather keyboard, so that the built-in hall sensor is unnecessary for some users, and the cost of the display device is increased, thereby generating waste. Moreover, the magnet arranged in the keyboard can also influence the detection precision of the compass in the display device, and the design difficulty of the display device is increased.
Disclosure of Invention
The embodiment of the application provides a keyboard, a display system and a control method of display equipment, which are used for solving the problems of reducing the cost and design difficulty of the display equipment when realizing cover opening and closing detection.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:
in a first aspect, a keyboard is provided that includes a keyboard body, a support, a first transmitting electrode, and a signal generating circuit. The support member is rotatably connected with the keyboard main body. The support is used for supporting and fixing the display device. The first transmitting electrode is arranged in the keyboard main body, the signal generating circuit is electrically connected with the first transmitting electrode, the signal generating circuit is used for generating a first alternating signal, and the first transmitting electrode is used for transmitting the first alternating signal. The first alternating signal is a square wave signal or a sinusoidal signal.
In this way, the first alternating signal can be continuously emitted outwards using the first emitting electrode. Based on the above, on the premise that the display device comprises a touch screen, the touch screen is a capacitive touch screen, when the keyboard is opened or closed, the first alternating signal is far away from or near the touch screen, and the capacitance of the touch module in the touch screen can be changed. From this, can realize opening and shutting the lid detection with the help of the touch module in the touch-sensitive screen, need not to set up detection structure in addition in display device to can not increase display device's cost. Meanwhile, the first transmitting electrode transmits alternating signals, so that the compass performance in the display device is not affected, and the design difficulty of the display device can be reduced.
In a possible implementation manner of the first aspect, the signal generating circuit includes a first controller. In some embodiments, the first controller is a micro-control unit, also called a single-chip microcomputer or a single-chip microcomputer, and is electrically connected to the first transmitting electrode, and the first controller is configured to generate the first alternating signal. The structure is simple and easy to realize.
In a possible implementation manner of the first aspect, the keyboard further includes a first external port. The first external port is arranged on the supporting piece, is electrically connected with the first controller and is used for externally connecting display equipment. The display device can be used for supplying power to the first controller, communication connection between the display device and the first controller is established, and a power supply and a communication device are not required to be arranged in the keyboard independently, so that the structural complexity and cost of the keyboard are reduced.
In a possible implementation manner of the first aspect, the keyboard body includes a keyboard module. The keyboard module is electrically connected with the first controller. In this way, the keyboard generates the first alternating signal by means of the first controller controlling the keyboard module, so that the structural complexity and the cost can be reduced.
In a possible implementation manner of the first aspect, the signal generating circuit includes an RC oscillating circuit. The RC oscillation circuit is electrically connected with the first transmitting electrode and is used for generating the first alternating signal. The RC oscillation circuit is a structure which commonly generates alternating signals, so that the RC oscillation circuit is easy to realize.
In a possible implementation manner of the first aspect, the keyboard further includes a signal driving circuit. The signal driving circuit is connected between the signal generating circuit and the first transmitting electrode, and is used for amplifying the first alternating signal generated by the signal generating circuit and outputting the amplified first alternating signal to the first transmitting electrode. Thus, the amplitude of the first alternating signal can be raised to a certain range (for example, between 3v and 10 v) so as to ensure the accuracy of open-close cover detection.
In a possible implementation manner of the first aspect, the keyboard body includes a keyboard surface, and a front projection area of the first transmitting electrode on the keyboard surface is greater than or equal to 25mm 2 And less than or equal to 1600mm 2 . Specifically, the orthographic projection area of the first transmitting electrode on the keyboard surface may be 25mm 2 、30mm 2 、50mm 2 、80mm 2 、100mm 2 、500mm 2 、1000mm 2 Or 1600mm 2 . Thus, the detection precision of the display device and the occupied volume of the keyboard main body can be simultaneously considered.
In a possible implementation manner of the first aspect, the orthographic projection of the first transmitting electrode on the keyboard surface may be square, round, rectangular, oval, triangular, polygonal, heart-shaped or W-shaped, L-shaped, H-shaped, M-shaped, or the like. In one possible implementation manner, the orthographic projection of the first transmitting electrode on the keyboard surface is in an irregular shape such as a W shape, an L shape, an H shape, an M shape, and the like, which causes a change in capacitance of an irregular area corresponding to the touch module in the display device. Specifically, when the orthographic projection of the first transmitting electrode on the keyboard surface is in a W shape, the capacitance of a W-shaped area with the same size as the touch module in the display device is caused to change; when the orthographic projection of the first transmitting electrode on the keyboard surface is L-shaped, the capacitance of an L-shaped area with the same size as the touch module in the display equipment is changed; when the orthographic projection of the first transmitting electrode on the keyboard surface is H-shaped, the capacitance of the H-shaped area with the same size as the touch module in the display device is changed; when the orthographic projection of the first transmitting electrode on the keyboard surface is M-shaped, the capacitance of M-shaped areas with the same size of the touch module in the display device is caused to change. Therefore, the identification degree of the capacitance change area on the touch module is higher, and the opening and closing detection precision of the system can be displayed.
In a possible implementation manner of the first aspect, the amplitude of the first alternating signal is greater than or equal to 3V and less than or equal to 10V. Specifically, the amplitude of the first alternating signal may be 3V, 4V, 5V, 6V, 7V, 8V, 9V or 10V. In this way, the detection accuracy and the cost of the display device can be simultaneously considered.
In a possible implementation manner of the first aspect, the frequency of the first alternating signal is greater than or equal to 100KHz and less than or equal to 400KHz. Specifically, the frequency of the first alternating signal may be 100KHz, 200KHz, 300KHz or 400KHz. Thus, the requirements on related circuits and electronic components are low, the cost is low, and the implementation is easy.
In a possible implementation manner of the first aspect, the keyboard further includes a rotational connection structure. The rotary connecting structure is connected between the supporting piece and the keyboard main body, and the supporting piece and the keyboard main body are rotatably connected by virtue of the rotary connecting structure. The first transmitting electrode is arranged at one end part of the keyboard main body far away from the rotary connecting structure. In this way, the travel of the first transmitting electrode relative to the display device is larger in the process of opening or closing the cover, and the linear speed of the first transmitting electrode is smaller and the detection sensitivity is higher on the premise that the rotation angular speed of the keyboard main body relative to the display device is fixed in the process of opening and closing the cover.
In a possible implementation manner of the first aspect, the keyboard further includes a second transmitting electrode. The signal generating circuit is also electrically connected with a second transmitting electrode, the signal generating circuit is also used for generating a second alternating signal, the second transmitting electrode is used for transmitting the second alternating signal, and the second transmitting electrode is arranged at one end part of the keyboard main body, which is close to the rotating connection structure. In this way, the detection accuracy can be improved by detecting the capacitance value change of the area opposite to the first transmitting electrode and the area opposite to the second transmitting electrode on the touch screen so as to realize the detection of the opening and closing cover. Meanwhile, when the end part of the keyboard main body far away from one end of the rotary connecting structure generates a tilted foot, the detection of the opening and closing cover can be realized by detecting the change of the capacitance value of the area, opposite to the second transmitting electrode, on the touch screen.
In a second aspect, a display system is provided, the display system comprising a display device and a keyboard as described in any of the above claims. The display device is supported and fixed on the support member of the keyboard.
Because the display system provided by the application comprises the keyboard according to any technical scheme, the keyboard and the display system can solve the same problems and achieve the same effects.
In a possible implementation manner of the second aspect, the display device includes a touch screen, and the touch screen is a capacitive touch screen.
In a third aspect, a control method of a display device is also provided, where the display device includes a capacitive touch screen. The control method comprises the following steps: the touch screen receives alternating signals; when a first preset area of the touch screen receives an alternating signal, acquiring the frequency of the alternating signal received by the first preset area to obtain a first frequency; when the first frequency is in a first preset frequency range, a first capacitance value of the first preset area is obtained; and transmitting a control signal according to the first capacitance value.
The first preset area refers to: when the display device is supported and fixed on the support member of the keyboard according to any one of the above embodiments, a partial area of the touch screen corresponding to the first transmitting electrode is provided. Wherein "corresponding" means a partial area of the touch screen opposite to the first transmitting electrode when the display device is supported and fixed on the support of the keyboard and the keyboard is in a closed state. When the display device is supported and fixed on the support piece of the keyboard and the keyboard is in a closed state, the orthographic projection area of the first transmitting electrode on the touch screen is defined as a first projection area, and the first preset area can be overlapped with the first projection area, can cover the first projection area, is positioned outside the edge of the first projection area, and can be positioned in the first projection area. Meanwhile, the shape of the first preset area may be the same as the shape of the first projection area, and specifically, when the shape of the first projection area is square, the shape of the first preset area is also square; when the shape of the first projection area is rectangular, the shape of the first preset area is also rectangular; when the shape of the first projection area is irregular, such as W-shape, L-shape, H-shape, M-shape, etc., the shape of the first preset area is also irregular, such as W-shape, L-shape, H-shape, M-shape, etc. In some embodiments, the first preset area is rectangular or square. Therefore, the shape rule of the first preset area can reduce the control difficulty and the design difficulty. On the basis, the first preset area covers the first projection area, the edge of the first preset area is located outside the edge of the first projection area, and the minimum distance between the edge of the first preset area and the edge of the first projection area is larger than or equal to 0mm and smaller than or equal to 5mm. It should be noted that, when the minimum distance between the edge of the first preset area and the edge of the first projection area is equal to 0mm, the edge of the first preset area at this position coincides with the edge of the first projection area.
In addition, the first capacitance value of the first preset area refers to: average value of capacitance values of all the capacitors in the first preset area.
Therefore, the display device realizes cover opening and closing detection by means of the touch screen, and the hardware structure of the display device is not required to be changed, so that the cost is lower.
In a possible implementation manner of the third aspect, the sending a control signal according to the first capacitance value includes: when the first capacitance value is larger than or equal to a first preset threshold value, a first control signal is sent; when the first capacitance value is smaller than or equal to a second preset threshold value, a second control signal is sent; wherein the first preset threshold is greater than the second preset threshold. Thus, the control method is simple and easy to realize.
In a possible implementation manner of the third aspect, the first control signal is used to control the touch screen to deactivate (i.e. extinguish) so as to enter the sleep state; the second control signal is used for controlling the touch screen to lighten so as to wake up the touch screen. Therefore, the display equipment can be kept in a dormant state when the display system is in a closed state, and the touch screen is awakened when the display system is in an open state, so that the display function is realized, the use convenience is improved, and the electric quantity is saved. In other embodiments, the first control signal and the second control signal may also be used for other control purposes, and are not specifically limited herein.
In a possible implementation manner of the third aspect, according to the first capacitance value, the sending the control signal further includes: when the first capacitance value is smaller than the first preset threshold value and larger than the second preset threshold value, the touch screen maintains the last state. Specifically, when the display system is in an on state, the first capacitance value is smaller than or equal to a second preset threshold value, and at this time, the touch screen of the display device is in a bright screen state. Then, in the process of closing the display system, the first capacitance value gradually increases along with the reduction of the included angle between the display device and the keyboard main body. When the first capacitance value is greater than the second preset threshold value and less than the first preset threshold value, the touch screen of the display device is maintained in the last state (i.e. the bright screen state). And then, when the first capacitance value is increased to be greater than or equal to a first preset threshold value, a first control signal is sent to control the touch screen to be turned off. In contrast to the above procedure, when the display system is in the closed state, the first capacitance value is greater than or equal to the first preset threshold, and at this time, the touch screen of the display device is in the off-screen state. Then, in the process of uncovering the display system, the first capacitance value gradually decreases along with the increase of the included angle between the display device and the keyboard main body. When the first capacitance value is smaller than the first preset threshold value and larger than the second preset threshold value, the touch screen of the display device is maintained in the last state (namely, the off-screen state). And then, when the first capacitance value is reduced to be smaller than or equal to a second preset threshold value, a second control signal is sent to control the touch screen to lighten the screen so as to enter a lighting state.
In a possible implementation manner of the third aspect, after the touch screen receives the alternating signal, before acquiring the frequency of the alternating signal received by the first preset area, the control method further includes: and judging whether a second preset area of the touch screen receives an alternating signal or not. On the basis, when the first preset area of the touch screen receives the alternating signal, the frequency of the alternating signal received by the first preset area is obtained to obtain a first frequency, and the method comprises the following steps: when the first preset area and the second preset area of the touch screen both receive alternating signals, the frequency of the alternating signals received by the first preset area is obtained, so that the first frequency is obtained. In this way, when the first preset area and the second preset area detect the alternating signal at the same time, the frequency is acquired, and the following operation is performed, so that the accuracy of detecting the opening and closing cover can be improved, and unnecessary control steps are avoided.
The second preset area refers to: when the display device is supported and fixed on the support member of the keyboard according to any one of the above-mentioned aspects, a partial area of the touch screen corresponding to the second transmitting electrode is formed. Wherein "corresponding" means a partial area of the touch screen opposite to the second transmitting electrode when the display device is supported and fixed on the support of the keyboard and the keyboard is in the closed state. When the display device is supported and fixed on the support piece of the keyboard and the keyboard is in a closed state, the orthographic projection area of the second transmitting electrode on the touch screen is defined as a second projection area, and the second preset area can be overlapped with the second projection area, can cover the second projection area, is positioned outside the edge of the second projection area, and can be positioned in the second projection area. Meanwhile, the shape of the second preset area may be the same as the shape of the second projection area, and specifically, when the shape of the second projection area is square, the shape of the second preset area is also square; when the shape of the second projection area is rectangular, the shape of the second preset area is also rectangular; when the shape of the second projection area is irregular, such as W-shape, L-shape, H-shape, M-shape, etc., the shape of the second preset area is also irregular, such as W-shape, L-shape, H-shape, M-shape, etc. In some embodiments, the second predetermined area is rectangular or square. Therefore, the shape rule of the second preset area can reduce the control difficulty and the design difficulty. On the basis, the second preset area covers the second projection area, the edge of the second preset area is positioned outside the edge of the second projection area, and the minimum distance between the edge of the second preset area and the edge of the second projection area is larger than or equal to 0mm and smaller than or equal to 5mm. It should be noted that, when the minimum distance between the edge of the second preset area and the edge of the second projection area is equal to 0mm, the edge of the second preset area at the position coincides with the edge of the second projection area.
In a possible implementation manner of the third aspect, after determining whether the second preset area of the touch screen receives the alternating signal, and before acquiring the capacitance value of the first preset area, the control method further includes: when the alternating signal is received by a second preset area of the touch screen, the frequency of the alternating signal received by the second preset area is obtained to obtain a second frequency. On the basis, when the first frequency is in the first preset frequency range, acquiring a first capacitance value of a first preset area, wherein the first capacitance value comprises: when the first frequency is in the first preset frequency range and the second frequency is in the second preset frequency range, a first capacitance value of the first preset area is obtained. In this way, when the first frequency is within the first preset frequency range and the second frequency is within the second preset frequency range, the capacitance value of the first preset area is obtained again, and the following operation is performed, so that the accuracy of detecting the opening and closing cover can be improved, and unnecessary control steps are avoided.
In a possible implementation manner of the third aspect, after acquiring the frequency of the alternating signal received by the second preset area to obtain the second frequency, the control method further includes: and when the second frequency is in a second preset frequency range, acquiring a second capacitance value of a second preset area. On the basis, according to the first capacitance value, a control signal is sent, comprising: and transmitting a control signal according to the first capacitance value and the second capacitance value. In this way, the control signal is sent according to the first capacitance value and the second capacitance value, so that control accuracy can be improved.
The second capacitance value of the second preset area refers to: and an average value of capacitance values of the capacitors in the second preset area.
In a possible implementation manner of the third aspect, the sending the control signal according to the first capacitance value and the second capacitance value includes: and when the first capacitance value is greater than or equal to a first preset threshold value and/or the second capacitance value is greater than or equal to a third preset threshold value, sending a first control signal. And when the first capacitance value is smaller than or equal to a second preset threshold value and/or the second capacitance value is smaller than or equal to a fourth preset threshold value, sending a second control signal. The first preset threshold value is larger than the second preset threshold value, and the third preset threshold value is larger than the fourth preset threshold value. In this way, as long as the capacitance value of one of the first preset area and the second preset area meets the preset condition, the control signal can be sent, and the problem that the detection accuracy is reduced due to the fact that the warping angle is generated on the keyboard main body where the first transmitting electrode or the second transmitting electrode is located can be avoided.
In a possible implementation manner of the third aspect, the touch screen maintains the previous state when the first capacitance value is smaller than the first preset threshold value and larger than the second preset threshold value, and the second capacitance value is smaller than the third preset threshold value and smaller than the fourth preset threshold value. Specifically, when the display system is in an on state, the first capacitance value is smaller than or equal to a second preset threshold value, and/or the second capacitance value is smaller than or equal to a fourth preset threshold value, and at this time, the touch screen of the display device is in a bright screen state. Then, in the process of closing the display system, the first capacitance value gradually increases along with the reduction of the included angle between the display device and the keyboard main body. When the first capacitance value is greater than the second preset threshold value and less than the first preset threshold value, and the second capacitance value is greater than the fourth preset threshold value and less than the third preset threshold value, the touch screen of the display device is maintained in the last state (namely, the bright screen state). And then, when the first capacitance value is increased to be greater than or equal to a first preset threshold value, and/or the second capacitance value is increased to be greater than or equal to a third preset threshold value, a first control signal is sent to control the touch screen to be turned off so as to enter a dormant state. In contrast to the above procedure, when the display system is in the closed state, the first capacitance value is greater than or equal to the first preset threshold value, and/or the second capacitance value is increased to be greater than or equal to the third preset threshold value, and at this time, the touch screen of the display device is in the off-screen state. Then, in the process of uncovering the display system, the first capacitance value gradually decreases along with the increase of the included angle between the display device and the keyboard main body. When the first capacitance value is smaller than the first preset threshold value and larger than the second preset threshold value, and the second capacitance value is smaller than the third preset threshold value and larger than the fourth preset threshold value, the touch screen of the display device is maintained in the last state (namely, the screen-off state). And then, when the first capacitance value is reduced to be smaller than or equal to a second preset threshold value, and/or the second capacitance value is reduced to be smaller than or equal to a fourth preset threshold value, a second control signal is sent to control the touch screen to lighten so as to enter a lightening state.
In a possible implementation manner of the third aspect, the operation time slot of the touch screen includes a touch detection time slot, the touch detection time slot includes a noise detection time slot, and the touch screen receives an alternating signal, including: the touch screen receives the alternating signal at a noise detection time slot.
In a possible implementation manner of the third aspect, the touch detection time slot further includes a finger detection time slot or a pen identification time slot.
In a possible implementation manner of the third aspect, the operation time slots of the touch screen include alternate operation time slots, and the alternate operation time slots are sequentially and alternately set by the display time slots and the touch detection time slots. Therefore, the display time slot and the touch detection time slot are time division multiplexed, and the display module and the touch module in the touch screen can be controlled and driven by adopting one chip, so that the display device has the advantages of simple structure, low cost and higher integration degree.
In a fourth aspect, there is provided a computer storage medium comprising computer instructions which, when run on a display device, cause the display device to perform a control method as claimed in any one of the preceding claims.
In a fifth aspect, there is provided a computer program product for, when run on a computer, causing the computer to carry out the control method according to any one of the preceding claims.
The computer storage medium or the computer program product provided in the embodiments of the present application are used to execute the control method according to any one of the above technical solutions, so that the beneficial effects that can be achieved by the computer storage medium or the computer program product can refer to the beneficial effects in the corresponding control method provided above, and are not described herein again.
Drawings
FIG. 1 is a perspective view of a display system provided in some embodiments of the present application;
FIG. 2 is an exploded view of the display system of FIG. 1;
FIG. 3 is a schematic view of the display system of FIG. 1 in a closed state;
FIG. 4 is a schematic structural diagram of a display system according to further embodiments of the present application;
FIG. 5 is a schematic diagram of a display system according to further embodiments of the present application;
FIG. 6 is a schematic diagram illustrating a structure of the display system shown in FIG. 5 after the keyboard module is hidden;
fig. 7 is a schematic cross-sectional structure of a display device according to some embodiments of the present application;
FIG. 8 is a state diagram of a display system according to some embodiments of the present application during a capping process; fig. 8 (a) is a schematic structural diagram of the display system in the capping process; fig. 8 (b) is a graph showing the intensity of the signal (voltage signal u) emitted from the first emission electrode with time t; fig. 8 (C) is a graph showing a change of capacitance C of a portion of the touch module opposite to the first transmitting electrode in the display device with an included angle θ3;
FIG. 9 is a state diagram of a display system provided in some embodiments of the present application during an uncapping process; fig. 9 (a) is a schematic structural diagram showing the system in the process of opening the cover; fig. 9 (b) is a graph showing the intensity of the signal u emitted from the first transmitting electrode with time t; fig. 9 (C) is a graph showing a change in capacitance C of a portion of the touch module opposite to the first transmitting electrode in the display device with an included angle θ3;
FIG. 10 is a schematic diagram of a keyboard according to further embodiments of the present disclosure;
FIG. 11 is a circuit diagram of the display system of FIG. 5;
FIG. 12 is a circuit diagram of a keyboard according to further embodiments of the present application;
FIG. 13 is a circuit diagram of an RC oscillating circuit according to some embodiments of the present application;
FIG. 14 is a diagram of an internal circuit of a keyboard according to further embodiments of the present application;
fig. 15 is a flowchart of a control method of a display device according to some embodiments of the present application;
FIG. 16 is a flowchart of a control method of a display device according to further embodiments of the present application;
fig. 17 is a specific flowchart of step S400 in the control method of the display apparatus shown in fig. 15 and 16;
FIG. 18 is a flowchart of a control method of a display device according to further embodiments of the present application;
Fig. 19 is a specific flowchart of step S400 in the control method of the display device shown in fig. 18.
Detailed Description
In the present embodiments, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
In the present embodiments, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the embodiment of the present application, "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The application provides a display system. Referring to fig. 1 and 2, fig. 1 is a perspective view of a display system 100 according to some embodiments of the present application, and fig. 2 is an exploded view of the display system 100 shown in fig. 1. The display system 100 includes a display device 10 and a keyboard 20.
Wherein the display device 10 is used for displaying video or pictures. The display device 10 includes, but is not limited to, a cell phone, a tablet computer, a laptop computer (laptop), a personal digital assistant (personal digital assistant, PDA), etc., and the various embodiments of fig. 1-2 and the following are exemplary illustrations of the display device 10 as a tablet computer, which should not be construed as a particular limitation of the present application.
The display device 10 has a substantially rectangular flat plate shape. The display device 10 includes a display surface 10a and a back surface 10b. The display surface 10a includes a display interface for displaying pictures or videos, and the display surface 10a may be used as a display interface as a whole or as a display interface in a partial region. The back surface 10b is opposite to the display surface 10 a.
The keyboard 20 is used for facilitating the user to input data and instructions to the display device 10, and meanwhile, the keyboard 20 is also used for protecting the display device 10 from being knocked and scratched. Specifically, the keyboard 20 includes a keyboard main body 21 and a support 22.
In some embodiments, the keyboard body 21 is substantially rectangular flat plate-like. On this basis, for convenience of description of the embodiments hereinafter, an XYZ coordinate system is established, the length direction of the keyboard body 21 is defined as the X-axis direction, the width direction of the keyboard body 21 is defined as the Y-axis direction, and the thickness direction of the keyboard body 21 is defined as the Z-axis direction. It is to be understood that the coordinate system of the keyboard body 21 may be flexibly set according to actual needs, which is not particularly limited herein. In other embodiments, the keyboard body 21 may also be substantially square flat plate-like, circular flat plate-like, oval flat plate-like, or the like.
The keyboard main body 21 includes a keyboard housing 211 and a keyboard module 212, the keyboard housing 211 is used for protecting internal electronic components, the keyboard housing 211 includes a first wall plate 211a, and the first wall plate 211a is approximately parallel to the XY plane. The keyboard module 212 is disposed on the first wall 211a, and the keyboard module 212 is used for inputting data and instructions. On this basis, for convenience of description of the following embodiments, an outer surface of the first wall plate 211a is defined as a keyboard surface A1.
The support 22 is rotatably connected to the keyboard main body 21. Specifically, the keyboard 20 further includes a rotational connection structure 23, and the rotational connection structure 23 is connected between the support 22 and the keyboard body 21, and the support 22 and the keyboard body 21 are rotatably connected by the rotational connection structure 23. The rotational coupling structure 23 includes, but is not limited to, flexible structures such as a shaft and a holster.
The support 22 serves to support and fix the display apparatus 10. The support 22 may be used to support and secure the display device 10 in its entirety, or may be used to support and secure the display device 10 in part. In some embodiments, referring to fig. 1 and 2, the support 22 includes a first support 221 and a second support 222. The first supporting member 221 is rotatably connected to the keyboard body 21 by the above-mentioned rotation connection structure 23, and the second supporting member 222 is rotatably connected to the first supporting member 221. The rotational axis between the second support 222 and the first support 221 is substantially parallel to the rotational axis of the rotational connection 23. The support 22 supports and fixes the display apparatus 10 by means of the second support 222. Specifically, the second support 222 may be used to fix the display device 10 in a detachable manner, such as, but not limited to, a magnetic type and a snap type. In this way, the display apparatus 10 can be detached from the second support 222 for separate use.
On the basis of the above, for convenience of description of the embodiments hereinafter, a surface of the support 22 for supporting and fixing the display apparatus 10 is defined as a supporting surface A2. In the embodiment shown in fig. 1 and 2, the supporting surface A2 is a surface of the second supporting member 222.
In some embodiments, referring to fig. 1 and 2, a first magnetic structure 213 may be disposed on the keyboard main body 21, and the first magnetic structure 213 is located between the keyboard module 212 and the rotation connection structure 23. The display device 10 is provided with a second magnetic attraction structure 10c. In some embodiments, the first magnetic attraction structure 213 is a magnet, and the second magnetic attraction structure 10c includes but is not limited to iron, cobalt, nickel, and other substances and alloys thereof, and the first magnetic attraction structure 213 and the second magnetic attraction structure 10c can be fixed by attraction.
The display system 100 may be switched between an open state and a closed state.
Fig. 1 and 2 are perspective views showing the display system 100 in an open state in which the opening angle θ1 of the first support 221 with respect to the keyboard body 21 is an acute angle and the opening angle θ2 of the second support 222 with respect to the keyboard body 21 is an obtuse angle. The display device 10 is supported and fixed on the second support 222, and the display device 10 is magnetically fixed on the first magnetic structure 213 by means of the second magnetic structure 10c. The fixing manner of the first magnetic structure 213 and the second magnetic structure 10c may be replaced by other fixing manners, such as a threaded connection, a clamping connection, a riveting connection, and the like. In this way, the display apparatus 10, the first support 221 and the keyboard main body 21 form a triangle-shaped stable structure, which can support and fix the display apparatus 10 in an inclined position for convenience of use by a user.
It should be noted that the structural form of the keyboard 20 is not limited to the structure shown in fig. 1 and 2. When the keyboard 20 is in other structural forms, the keyboard 20 may take other forms in the open state, which is not particularly limited herein.
Referring to fig. 3, fig. 3 is a schematic structural diagram of the display system 100 shown in fig. 1 in a closed state, in which the support 22 covers the back surface 10b of the display device 10, and the keyboard main body 21 covers the display surface 10a of the display device 10. In this way, the keyboard 20 can protect the display device 10 from knocks and scratches.
The process of switching the display system 100 from the closed state to the open state is an uncapping process. During the opening of the cover, the angle between the display device 10 and the keyboard main body 21 increases. Accordingly, the process of switching the display system 100 from the open state to the closed state is a capping process. During the closing process, the angle between the display device 10 and the keyboard main body 21 is reduced.
On the basis of the above, for the purpose of saving energy, when the display system 100 is detected to be in the uncapping process, the screen of the display apparatus 10 is lit up to realize the display function. When the display system 100 is detected to be in the cover closing process, the screen of the display device 10 is turned off to enter a sleep state to save power consumption.
In order to realize the detection of the opening and closing of the keyboard 20, so as to control the display device 10 to turn on or off, referring to fig. 4, fig. 4 is a schematic structural diagram of a display system 100 according to still another embodiment of the present application. Wherein the keyboard 20 is in a flattened state. The display system 100 according to the present embodiment differs from the display system 100 shown in fig. 1 in that: a hall sensor H is provided in the display device 10, and a magnet M is provided in the keyboard main body 21 of the keyboard 20. When the display system 100 is in the closed state, the set position of the magnet M is substantially opposite to the set position of the hall sensor H. The closing or opening detection purpose is achieved by the fact that the Hall sensor H senses the approaching or the separating of the magnet M. However, in this solution, the hall sensor H needs to be disposed in the display device 10, and not all users of the display device have the use requirement of the keyboard 20, so that it is unnecessary for the users to dispose the hall sensor H in the display device 10, which causes an increase in the cost of the display device 10, thereby causing waste. In addition, in the process of opening and closing the cover, the magnet M disposed in the keyboard main body 21 also affects the detection accuracy of the compass in the display device 10, and increases the design difficulty of the display device 10.
In order to reduce the cost and design difficulty of the display device 10 while implementing the detection of the opening and closing cover, referring to fig. 5 and 6, fig. 5 is a schematic structural diagram of the display system 100 according to still another embodiment of the present application, and fig. 6 is a schematic structural diagram of the display system 100 shown in fig. 5 after the keyboard 20 is hidden in the keyboard module 212. In this embodiment, the keyboard 20 is in a flattened state. The keyboard 20 includes a first transmitting electrode 24a in addition to the keyboard body 21 and the support 22. The first emitter electrode 24a is a metal electrode, and specifically, the material of the first emitter electrode 24a includes, but is not limited to, copper and copper alloy. The first transmitting electrode 24a is for transmitting a first alternating signal. Specifically, the first transmitting electrode 24a is configured to transmit a first alternating signal to a side facing the keyboard surface A1. Optionally, the first alternating signal is an alternating voltage signal including, but not limited to, a pulse width modulated (pulse width modulation, PWM) wave signal and a sine wave signal. The first transmission electrode 24a transmitting the first alternating signal means: when the first alternating signal is transmitted to the first transmitting electrode 24a, the first transmitting electrode 24a converts the first alternating signal into an electromagnetic wave signal and transmits it.
The first transmitting electrode 24a is disposed within the keyboard body 21. Specifically, the first transmitting electrode 24a may be disposed in the keyboard housing 211 of the keyboard body 21 to ensure the uniformity of the appearance of the keyboard body 21. On this basis, at least a portion of the first wall plate 211a opposite to the first transmitting electrode 24a is made of a non-metal material, so as to avoid interference with propagation of electromagnetic wave signals corresponding to the first alternating signals to the keyboard surface A1.
In this way, the first transmission electrode 24a can be used to continuously transmit the first alternating signal outwards. Based on this, on the premise that the display device 10 includes a touch screen, the touch screen is a capacitive touch screen, when the keyboard 20 is opened or closed, the first alternating signal is far away from or near the touch screen, which causes a change in capacitance of the touch module in the touch screen. Therefore, the cover opening and closing detection can be realized by means of the touch module in the touch screen, and a detection structure is not required to be additionally arranged in the display device 10, so that the cost of the display device is not increased. Meanwhile, the first transmitting electrode 24a transmits alternating signals, so that the compass performance in the display device 10 is not affected, and the design difficulty of the display device 10 can be reduced.
The technical effects described above are further elucidated below in conjunction with the accompanying drawings.
Referring to fig. 7, fig. 7 is a schematic cross-sectional structure of a display device 10 according to some embodiments of the present application. The display device 10 includes a touch screen 11, a back shell 12, and a circuit board assembly 13.
The touch screen 11 includes a transparent cover 111, a touch module 112, and a display module 113, which are sequentially stacked. The transparent cover 111 is used for protecting the touch module 112 and the display module 113, and the material of the transparent cover 111 includes, but is not limited to, glass. The touch module 112 is used for detecting a finger or a handwriting pen to simplify man-machine communication. The touch module 112 may be a capacitive touch module, and the capacitive touch module is divided into self-capacitive touch module and mutual capacitive touch module. Alternatively, the touch module 112 may be a self-capacitive touch module. The display module 113 is used for displaying video and images. The display module 113 includes, but is not limited to, a self-luminous display module such as an organic light-emitting diode (OLED), and a display module such as a liquid crystal display (liquid crystal display, LCD) that cannot self-emit light and needs to be provided with a backlight module to provide backlight.
The back shell 12 includes a back cover 121 and a bezel 122. The back cover 121 is located at one side of the display module 113 away from the transparent cover 111, the back cover 121 and the touch screen 11 are stacked and arranged at intervals, and the frame 122 is located between the back cover 121 and the transparent cover 111 of the touch screen 11 and surrounds the back cover 121. The frame 122 is fixed to the back cover 121. Illustratively, the bezel 122 may be fixedly attached to the back cover 121 by adhesive. The frame 122 and the back cover 121 may be integrally formed, i.e., the frame 122 and the back cover 121 are integrally formed. The touch screen 11 is fixed to the bezel 122. In some embodiments, the touch screen 11 may be fixed to the bezel 122 by gluing. The touch screen 11, the back cover 121 and the bezel 122 enclose an internal accommodating space of the display device 100. The circuit board assembly 13 is accommodated in the inner accommodating space, and the circuit board assembly 13 includes a circuit board and electronic components disposed on the circuit board. The circuit board assembly 13 is electrically connected to the touch screen 11 to control the operation of the touch screen 11.
In the above embodiment, the surface of the touch screen 11 away from the back cover 121 forms the display surface 10a, and the surface of the back cover 121 away from the touch screen 11 forms the back surface 10b.
When the display device 10 is applied to the display system 100 and is closed, referring to fig. 8, fig. 8 is a state diagram of the display system 100 in the closing process according to some embodiments of the present application. Specifically, fig. 8 (a) is a schematic structural diagram of the display system 100 in a capping process. During the closing process, the display device 10 rotates in the direction a1 relative to the keyboard body 21, the angle θ3 (equal to the aforementioned angle θ2) between the display device 10 and the keyboard body 21 decreases, the first transmitting electrode 24a approaches the display device 10, and the first transmitting electrode 24a continuously transmits the first alternating signal. Fig. 8 (b) is a graph of the intensity of the signal (voltage signal u) emitted by the first emitter electrode 24a over time t, and the amplitude of the first alternating signal is kept constant. The first alternating signal affects the capacitance of the touch module 112 in the display device 10, and the closer the distance is, the greater the effect on the capacitance. Fig. 8 (C) is a graph showing a change of capacitance C of a portion of the display device 10, where the portion of the touch module 112 opposite to the first transmitting electrode 24a is along with the included angle θ3, and in the closing process, the included angle θ3 and the distance decrease along with time, and the capacitance C of the touch module 112 increases, so that the relative position of the display device 10 and the keyboard body 21 can be determined by detecting the change of the capacitance C of the touch module 112, thereby realizing the closing detection.
When the above display device 10 is applied to the display system 100 and the cover is opened, referring to fig. 9, fig. 9 is a state diagram of the display system 100 in the process of opening the cover according to some embodiments of the present application, specifically, (a) in fig. 9 is a schematic structural diagram of the display system 100 in the process of opening the cover. During the door opening process, the display apparatus 10 rotates in the direction a2 with respect to the keyboard main body 21. The included angle θ3 between the display device 10 and the keyboard body 21 increases, the first transmitting electrode 24a is far away from the display device 10, the first transmitting electrode 24a continuously transmits the first alternating signal, and fig. 9 (b) is a graph of the intensity of the signal u transmitted by the first transmitting electrode 24a over time t. The first alternating signal affects the capacitance of the touch module 112 in the display device 10, and the farther the distance is, the smaller the effect on the capacitance is. Fig. 9 (C) is a graph showing a change in capacitance C of a portion of the display device 10, where the portion of the touch module 112 opposite to the first transmitting electrode 24a is along with the included angle θ3, and in the process of opening the cover, the included angle θ3 and the distance increase along with time, and the capacitance change amount C of the touch module 112 decreases, so that the relative position of the display device 10 and the keyboard body 21 can be determined by detecting the change of the capacitance C of the touch module 112, thereby implementing the cover opening detection.
The above-mentioned process of uncapping and uncapping is to utilize the current touch module 112 in the display device 10 to realize detecting, need not to set up detection structure in addition in the display device 10 to can not increase the cost of display device, simultaneously first transmitting electrode 24a is the alternating signal, can not exert an influence to the compass performance in the display device 10, thereby can reduce the design degree of difficulty of display device 10.
The shape of the first transmitting electrode 24a includes, but is not limited to, a block shape, a sheet shape, a column shape, and the like. In some embodiments, the first transmitting electrode 24a is sheet-shaped, and the first transmitting electrode 24a is substantially parallel to the keyboard plane A1, that is, the first transmitting electrode 24a is substantially parallel to the XY plane. Thus, the thickness of the keyboard main body 21 is reduced.
The front projection of the first emitter electrode 24a on the keyboard surface A1 may be square, round, rectangular, oval, triangular, polygonal, heart-shaped, or irregular shapes such as W-shaped, L-shaped, H-shaped, M-shaped, etc. In some embodiments, referring to fig. 5 and 6, the front projection of the first transmitting electrode 24a on the keyboard surface A1 is square, which is regular and convenient for molding. In other embodiments, the front projection of the first transmitting electrode 24a on the keyboard surface A1 is shaped like W, L, H, M, etc., which causes the capacitance of the irregular area corresponding to the touch module 112 in the display device 10 to change. Specifically, when the front projection of the first emitter electrode 24a on the keyboard surface A1 is W-shaped, the capacitance of the W-shaped area with the same size of the touch module 112 in the display device 10 is changed; when the front projection of the first transmitting electrode 24a on the keyboard surface A1 is L-shaped, the capacitance of the L-shaped area with the same size as the touch module 112 in the display device 10 is changed; when the front projection of the first transmitting electrode 24a on the keyboard surface A1 is H-shaped, the capacitance of the H-shaped area with the same size of the touch module 112 in the display device 10 is changed; when the front projection of the first transmitting electrode 24a on the keyboard surface A1 is M-shaped, the capacitance of the M-shaped area with the same size of the touch module 112 in the display device 10 is changed. Thus, the identification degree of the capacitance change area on the touch module 112 is high, and the opening and closing detection precision of the system can be displayed.
The size of the front projection area of the first emitter electrode 24a on the keyboard plane A1 also affects the detection accuracy of the display device 10. Specifically, the larger the orthographic projection area, the greater the detection accuracy. However, the larger the front projection area, the larger the occupation space of the first emitter electrode 24a in the keyboard main body 21, which is disadvantageous for installation in the keyboard main body 21 having a limited space. In some embodiments, the front projection area of the first transmitting electrode 24a on the keyboard surface A1 is greater than or equal to 25 square millimeters (mm) 2 ) And less than or equal to 1600mm 2 . Specifically, the front projection area of the first transmitting electrode 24a on the keyboard surface A1 may be 25mm 2 、30mm 2 、50mm 2 、80mm 2 、100mm 2 、500mm 2 、1000mm 2 Or 1600mm 2 . In this way, the detection accuracy of the display device 10 and the occupied volume in the keyboard main body 21 can be simultaneously considered.
The magnitude of the first alternating signal emitted by the first emitting electrode 24a also affects the detection accuracy of the display device 10. Specifically, the larger the amplitude of the first alternating signal, the greater the detection accuracy. However, the larger the amplitude of the first alternating signal, the more complex and costly the circuit will be. In some embodiments, the amplitude of the first alternating signal emitted by the first emitter electrode 24a is greater than or equal to 3 volts (V) and less than or equal to 10V. Specifically, the amplitude of the first alternating signal may be 3V, 4V, 5V, 6V, 7V, 8V, 9V or 10V. In this way, the detection accuracy and the cost of the display device 10 can be simultaneously considered.
In some embodiments, the first alternating signal has a frequency of 100 kilohertz (KHz) to 400KHz. Specifically, the frequency of the first alternating signal may be 100KHz, 200KHz, 300KHz or 400KHz. Thus, the requirements on related circuits and electronic components are low, the cost is low, and the implementation is easy.
In some embodiments, referring to fig. 5 and 6, the first transmitting electrode 24a is disposed at an end of the keyboard body 21 away from the rotation connection structure 23. In this way, the first emitter electrode 24a has a relatively large movement stroke with respect to the display device 10 during the opening and closing processes, and the first emitter electrode 24a has a relatively small linear velocity and relatively high detection sensitivity on the premise that the angular velocity of rotation of the keyboard main body 21 with respect to the display device 10 is constant during the opening and closing processes.
However, since the end of the keyboard body 21 away from the rotational connection structure 23 is prone to a tilt angle during use, the accuracy of open/close cover detection is low. In order to avoid this problem, in some embodiments, please refer to fig. 10, fig. 10 is a schematic structural diagram of a keyboard 20 according to still other embodiments of the present application. In the present embodiment, the keyboard 20 includes a second emitter electrode 24b in addition to the first emitter electrode 24 a. The second emitter electrode 24b may have the same structure as the first emitter electrode 24a, and will not be described herein. The second transmitting electrode 24b is for transmitting a second alternating signal. The second alternating signal may be the same as the first alternating signal, and will not be described here. In this way, the detection accuracy can be improved by detecting the change in capacitance value of the region of the touch screen 11 opposite to the first emitter electrode 24a and the region opposite to the second emitter electrode 24a, so as to realize the open/close detection.
On this basis, as shown in fig. 10, the second transmitting electrode 24b is disposed at an end portion of the keyboard body 21 near the rotation connection structure 23. In this way, when the foot tilting occurs at the end of the keyboard main body 21 away from the rotation connection structure 23, the detection of the open/close cover can be similarly realized by detecting the capacitance change of the area of the touch panel 11 opposite to the second transmitting electrode 24 a.
Referring back to fig. 5 and 6, the keyboard 20 further includes a signal generating circuit. The signal generating circuit is electrically connected to the first transmitting electrode 24 a. The signal generating circuit is used for generating the first alternating signal.
It should be noted that, when the keyboard 20 further includes the second transmitting electrode 24b, the signal generating circuit is further electrically connected to the second transmitting electrode 24 b. The signal generating circuit is also used for generating the second alternating signal.
The signal generating circuit is disposed within the keyboard 20. In some embodiments, the signal generating circuit may be disposed in the keyboard body 21, specifically, the signal generating circuit is disposed in the keyboard housing 211 of the keyboard body 21, so as to ensure the consistency of the appearance of the keyboard body 21. In other embodiments, the signal generating circuit may also be disposed on the outer surface of the keyboard housing 211 or on the support 22, which is not specifically limited herein.
The signal generating circuit may have various structural forms, and in some embodiments, referring to fig. 5 and 6, the signal generating circuit includes a first controller 25. In some embodiments, the first controller 25 is a micro control unit (microcontroller unit, MCU), also known as a single-chip microcomputer (single chip microcomputer) or a single-chip microcomputer. The first controller 25 is electrically connected to the first transmitting electrode 24a, and the first controller 25 is configured to generate the first alternating signal. On the basis, when the keyboard 20 further includes the second transmitting electrode 24b, referring to fig. 10, the first controller 25 is further electrically connected to the second transmitting electrode 24 b. The first controller 25 is also adapted to generate the above-mentioned second alternating signal. The structure is simple and easy to realize.
On the basis of the above, the first controller 25 is further electrically connected to the keyboard module 212 to control the keyboard module 212. In this way, the controller of the keyboard 20 multiplexing keyboard module 212 provided in the present application generates the first alternating signal, which can reduce the structural complexity and the cost.
With continued reference to fig. 5 and 6, the keyboard 20 further includes a first external port 26. In some embodiments, the first external port 26 may be provided on the support 22. Specifically, the first external connection port 26 may be disposed on the supporting surface A2. The first external port 26 is electrically connected to the first controller 25. The first external port 26 is for externally connecting the display device 10.
On the basis of the above embodiment, referring to fig. 5, the back surface 10b of the display device 10 is provided with the second external port 10d. When the display device 10 is supported and fixed on the support 22, the first external connection port 26 is electrically connected with the second external connection port 10d in a mating manner. The first external port 26 and the second external port 10d may be plug-in ports or contact ports. Wherein, the plug-in port can be a pogo pin connector. In some embodiments, to ensure surface flatness of the display device 10 and the keyboard 20, the first external port 26 and the second external port 10d are contact ports. Through the cooperation electrical connection of the first external connection port 26 and the second external connection port 10d, the display device 10 can be used for supplying power to the first controller 25, and communication connection between the display device 10 and the first controller 25 is established, so that a power supply and a communication device are not required to be arranged in the keyboard 20 independently, and the structural complexity and the cost of the keyboard 20 are reduced. The power supply mode of the display device 10 to the keyboard 20 may also be a wireless charging mode to realize power transmission, and the communication connection may also be a short-distance wireless communication mode such as bluetooth (bluetooth).
In some embodiments, referring to fig. 5 and 6, the first external port 26 may include a power terminal, a ground terminal, and a signal terminal. The power supply terminal is used for transmitting a power supply signal, the ground terminal is used for transmitting a ground signal, and the signal terminal is used for realizing signal communication between the display device 10 and the first controller 25. Correspondingly, the second external port 10d also includes a power supply terminal, a ground terminal, and a signal terminal. When the first external port 26 is electrically connected with the second external port 10d in a matching manner, the power terminal of the first external port 26 is electrically connected with the power terminal of the second external port to supply power to the first controller 25; the ground terminal of the first external port 26 is electrically connected to the ground terminal of the second external port 10d to achieve the ground connection of the first controller 25; the signal terminals of the first external port 26 are electrically connected with the signal terminals of the second external port 10d to establish a communication connection.
Referring to fig. 11, fig. 11 is a circuit diagram of the display system 100 shown in fig. 5. In the present embodiment, the display apparatus 10 includes a second controller 14, a driver 15, and a third controller 16. In some embodiments, the second controller 14, the driver 15, and the third controller 16 may be electronic components within the circuit board assembly 13 (see fig. 7) of the display device 10. The second controller 14 may be a System On Chip (SOC). The second controller 14 cooperates with the first external port 26 via the second external port 10d to be in power and communication connection with the first controller 25. The driver 15 and the third controller 16 are electrically connected to the second controller 14. The driver 15 is electrically connected to the display module 113 (see fig. 7) in the touch screen 11, and the driver 15 is used for driving the display module 113. In some embodiments, the driver 15 may be a display driver chip (display driver integrated circuit, DDIC). The third controller 16 is electrically connected to the touch module 112 (refer to fig. 7) in the touch screen 11, and the third controller 16 is used for controlling the touch module 112.
In the above embodiment, the driver 15 and the third controller 16 may be two chips respectively to drive the display module 113 and control the touch module 112 respectively. In other embodiments, referring to fig. 11, the driver 15 and the third controller 16 may be integrated into one chip (hereinafter referred to as an integrated chip). Alternatively, the integrated chip may be a touch and display driver integrated (touch and display driver integration, TDDI) chip. The integrated chip is electrically connected with the touch module 112 and the display module 113. The integrated chip can respectively control the touch module 112 and the driving display module 113 in a time division multiplexing manner so as to switch the touch screen 11 between the touch detection time slot and the display time slot. In this way, the display device 10 is simple in structure and low in cost.
In other embodiments, referring to fig. 12, fig. 12 is a circuit diagram of a keyboard 20 according to still other embodiments of the present application. In the present embodiment, the signal generating circuit may also include an RC oscillation circuit 27. The RC oscillating circuit 27 is electrically connected to the first transmitting electrode 24a, and the RC oscillating circuit 27 is configured to generate the first alternating signal. Specifically, when the RC oscillation circuit 27 inputs a power supply signal, the RC oscillation circuit 27 changes the power supply signal into an alternating signal output. The power signal may be a direct current signal. The RC oscillating circuit 27 is a circuit structure that commonly generates an alternating signal, and is therefore easy to implement.
In the above embodiment, a power supply structure such as a power interface, a battery, or the like may be provided on the keyboard 20 to supply a power signal through the power supply structure. The power signal may also be obtained from the display device 10 by means of the power terminal 26a of the first external port 26. On the basis, please continue to refer to fig. 12, the power supply device may further include a switch 29, the switch 29 is connected in series between the power terminal 26a of the first external port and the RC oscillating circuit 27, the first controller 25 is electrically connected to the switch 29, and the first controller 25 is configured to control on or off of the switch 29 to achieve power supply or power off control. The switch 29 may be provided in the RC oscillation circuit 27.
On the basis of the above embodiment, when the keyboard 20 further includes the second transmitting electrode 24b, the RC oscillating circuit 27 is also electrically connected to the second transmitting electrode 24 b. The RC oscillating circuit 27 is further configured to generate the second alternating signal, where the second alternating signal and the first alternating signal are equal in amplitude and frequency. The structure is simple and easy to realize.
Referring to fig. 13, fig. 13 is a circuit diagram of an RC oscillating circuit 27 according to some embodiments of the present application. Wherein R is 1 、R 2 、R t 、R F Are all resistors. C (C) 1 、C 2 Are all capacitors. A is a comparator. Input power signal U in Applied to resistor R2 and can output oscillation signal U out 。
It should be noted that the structure of the RC oscillating circuit 27 is not limited to the structure shown in fig. 13, but may be other structures, which are known to those skilled in the art, and are not described herein.
In some embodiments, referring to fig. 14, fig. 14 is a circuit diagram of an internal circuit of a keyboard 20 according to still other embodiments of the present application. In the present embodiment, the keyboard 20 includes a signal driving circuit 28 in addition to the signal generating circuit and the first transmitting electrode 24a. The signal driving circuit 28 is electrically connected between the signal generating circuit and the first transmitting electrode 24a. The signal driving circuit 28 is configured to amplify the first alternating signal generated by the signal generating circuit and output the amplified first alternating signal to the first transmitting electrode 24a. In this way, the amplitude of the first alternating signal can be raised to a certain range (for example, between 3v and 10 v) so as to ensure the accuracy of detecting the open cover.
In order to realize cover opening and closing detection, the present application further provides a control method of the display device 10, wherein the display device 10 includes a capacitive touch screen, and in particular, the touch screen is a self-capacitive touch screen. On this basis, referring to fig. 15, fig. 15 is a flowchart of a control method of the display device 10 according to some embodiments of the present application, where the control method includes the following steps S100-S400.
Step S100: the touch screen receives the alternating signal.
The touch screen may receive the alternating signal as a whole, or may receive the alternating signal in a partial area, which is not particularly limited herein.
In some embodiments, the operation time slot of the touch screen includes a touch detection time slot K2, the touch detection time slot K2 includes a noise detection time slot K21, and step S100 includes: the touch screen receives the alternating signal in the noise detection slot K21.
The touch detection slot K2 may further include a finger detection slot K22 or a pen recognition slot K23. The finger detection slot K22 is used for detecting a finger, and the pen recognition slot K23 is used for recognizing a handwriting pen.
In some embodiments, in the present embodiment, the operation time slots of the touch screen include alternate operation time slots that are sequentially alternately arranged by the display time slot K1 and the touch detection time slot K2. Wherein, in the display time slot K1, the display module in the touch screen works. Therefore, the display time slot K1 and the touch detection time slot K2 are time division multiplexed, and the display module and the touch module in the touch screen can be controlled and driven by adopting one chip, so that the display device has the advantages of simple structure, low cost and higher integration degree.
Step S200: when the first preset area of the touch screen receives the alternating signal, the frequency of the alternating signal received by the first preset area is obtained to obtain a first frequency.
The first preset area refers to: when the display device 10 is supported and fixed on the support 22 of the above-described keyboard 20, a partial region of the touch screen corresponding to the first transmitting electrode 24a is provided. Wherein "corresponding" means a partial area of the touch screen opposite to the first transmitting electrode 24a when the display device 10 is supported and fixed on the support 22 of the above-mentioned keypad 20 and the keypad 20 is in the closed state. When the display device 10 is supported and fixed on the support 22 of the keyboard 20 and the keyboard 20 is in the closed state, the front projection area of the first transmitting electrode 24a on the touch screen is defined as a first projection area, and the first preset area may be overlapped with the first projection area, may cover the first projection area, and may have an edge located outside the edge of the first projection area, or may be located in the first projection area. Meanwhile, the shape of the first preset area may be the same as the shape of the first projection area, and specifically, when the shape of the first projection area is square, the shape of the first preset area is also square; when the shape of the first projection area is rectangular, the shape of the first preset area is also rectangular; when the shape of the first projection area is irregular, such as W-shape, L-shape, H-shape, M-shape, etc., the shape of the first preset area is also irregular, such as W-shape, L-shape, H-shape, M-shape, etc. In some embodiments, the first preset area is rectangular or square. Therefore, the shape rule of the first preset area can reduce the control difficulty and the design difficulty. On the basis, the first preset area covers the first projection area, the edge of the first preset area is located outside the edge of the first projection area, and the minimum distance between the edge of the first preset area and the edge of the first projection area is larger than or equal to 0mm and smaller than or equal to 5mm. It should be noted that, when the minimum distance between the edge of the first preset area and the edge of the first projection area is equal to 0mm, the edge of the first preset area at this position coincides with the edge of the first projection area.
Step S300: when the first frequency is in a first preset frequency range, a first capacitance value of a first preset area is obtained.
Wherein the first preset frequency range includes the frequency of the first alternating signal emitted by the first emitter electrode 24 a. For example, the frequency of the first alternating signal emitted by the first emitting electrode 24a is 200Hz, and the first preset frequency range may be (200-10) Hz to (200+10) Hz, that is, 190Hz to 210Hz.
In addition, the first capacitance value of the first preset area refers to: average value of capacitance values of all the capacitors in the first preset area.
Step S400: and transmitting a control signal according to the first capacitance value.
In this way, the display device 10 can realize cover opening and closing detection by means of the touch screen, and the hardware structure of the display device 10 is not required to be changed, so that the cost is low.
In the above embodiment, referring to fig. 16, fig. 16 is a flowchart of a control method of the display device 10 according to still other embodiments of the present application, after step S100, before step S200, the control method further includes:
step S501: and judging whether the first preset area of the touch screen receives an alternating signal or not. After step S501, the above control method further includes step S502. Step S502: when the first preset area does not receive the alternating signal, the control signal is not sent.
In some embodiments, referring to fig. 16, after step S200, before step S300, the control method further includes:
step S601: judging whether the first frequency is in a first preset frequency range. After step S601, the above control method further includes step S602. Step S602: when the first frequency is outside the first preset frequency range, the control signal is not transmitted.
In some embodiments, referring to fig. 17, fig. 17 is a specific flowchart of step S400 in the control method of the display device 10 shown in fig. 15 and 16. In the present embodiment, step S400 includes the following steps S401 and S402.
Step S401, when the first capacitance value is larger than or equal to a first preset threshold value, a first control signal is sent. Step S402, when the first capacitance value is smaller than or equal to a second preset threshold value, a second control signal is sent. The first preset threshold value and the second preset threshold value are preset fixed values, the values of which can be determined according to the actual situation, and the first preset threshold value is larger than the second preset threshold value. Thus, the control method is simple and easy to realize.
In some embodiments, the first control signal is used to control the touch screen to deactivate the touch screen so as to enter the sleep state. The second control signal is used for controlling the touch screen to lighten. In this way, the display device 10 can be kept in the sleep state when the display system is in the closed state, and the touch screen is awakened when the display system is in the open state, so as to realize the display function, thereby improving the use convenience and saving the electric quantity. In other embodiments, the first control signal and the second control signal may also be used for other control purposes, and are not specifically limited herein.
On the basis of the above embodiment, step S400 further includes: when the first capacitance value is smaller than the first preset threshold value and larger than the second preset threshold value, the touch screen maintains the last state.
Specifically, when the display system is in an on state, the first capacitance value is smaller than or equal to a second preset threshold value, and at this time, the touch screen of the display device is in a bright screen state. Then, in the process of closing the display system, the first capacitance value gradually increases along with the reduction of the included angle between the display device and the keyboard main body. When the first capacitance value is greater than the second preset threshold value and less than the first preset threshold value, the touch screen of the display device is maintained in the last state (i.e. the bright screen state). And then, when the first capacitance value is increased to be greater than or equal to a first preset threshold value, a first control signal is sent to control the touch screen to be turned off so as to enter a dormant state.
In contrast to the above procedure, when the display system is in the closed state, the first capacitance value is greater than or equal to the first preset threshold, and at this time, the touch screen of the display device is in the off-screen state. Then, in the process of uncovering the display system, the first capacitance value gradually decreases along with the increase of the included angle between the display device and the keyboard main body. When the first capacitance value is smaller than the first preset threshold value and larger than the second preset threshold value, the touch screen of the display device is maintained in the last state (namely, the off-screen state). And then, when the first capacitance value is reduced to be smaller than or equal to a second preset threshold value, a second control signal is sent to control the touch screen to lighten the screen so as to enter a lighting state.
In the above embodiment, step S400 further includes the following step S403 before step S401 and step S402.
Step S403: and judging the magnitude relation between the first capacitance value and the first preset threshold value and the magnitude relation between the first capacitance value and the second preset threshold value.
In order to improve the accuracy of the detection of the opening and closing cover of the display device 10, in some embodiments, referring to fig. 18, fig. 18 is a flowchart of a control method of the display device 10 provided in further embodiments of the present application, after step S100, before step S200, further includes: and judging whether a second preset area of the touch screen receives an alternating signal or not. Referring to fig. 18, this step may be included in step S501 described above. Specifically, in step S501, it is determined whether the second preset area of the touch screen receives the alternating signal, which may be performed after determining whether the first preset area of the touch screen receives the alternating signal, or may be performed simultaneously with determining whether the first preset area of the touch screen receives the alternating signal before determining whether the first preset area of the touch screen receives the alternating signal, which is not limited herein.
In the above embodiment, the second preset area is a fixed area of the touch screen. Specifically, the second preset area refers to: when the display device 10 is supported and fixed on the support 22 of the keyboard 20, a partial area of the touch screen corresponding to the second transmitting electrode 24b is provided. Wherein "corresponding" means a partial area of the touch screen opposite to the second transmitting electrode 24b when the display device 10 is supported and fixed on the support 22 of the above-mentioned keyboard 20 and the keyboard 20 is in the closed state. When the display device 10 is supported and fixed on the support 22 of the keyboard 20 and the keyboard 20 is in the closed state, the orthographic projection area of the second transmitting electrode on the touch screen is defined as a second projection area, and the second preset area may be overlapped with the second projection area, may cover the second projection area, and may have an edge located outside the edge of the second projection area, or may be located in the second projection area. Meanwhile, the shape of the second preset area may be the same as the shape of the second projection area, and specifically, when the shape of the second projection area is square, the shape of the second preset area is also square; when the shape of the second projection area is rectangular, the shape of the second preset area is also rectangular; when the shape of the second projection area is irregular, such as W-shape, L-shape, H-shape, M-shape, etc., the shape of the second preset area is also irregular, such as W-shape, L-shape, H-shape, M-shape, etc. In some embodiments, the second predetermined area is rectangular or square. Therefore, the shape rule of the second preset area can reduce the control difficulty and the design difficulty. On the basis, the second preset area covers the second projection area, the edge of the second preset area is positioned outside the edge of the second projection area, and the minimum distance between the edge of the second preset area and the edge of the second projection area is larger than or equal to 0mm and smaller than or equal to 5mm. It should be noted that, when the minimum distance between the edge of the second preset area and the edge of the second projection area is equal to 0mm, the edge of the second preset area at the position coincides with the edge of the second projection area.
On the basis of the above, step S200 includes: when the first preset area and the second preset area both receive the alternating signals, the frequency of the alternating signals received by the first preset area is obtained, so that the first frequency is obtained.
In this way, when the first preset area and the second preset area detect the alternating signal at the same time, the frequency is acquired, and the following operation is performed, so that the accuracy of detecting the opening and closing cover can be improved, and unnecessary control steps are avoided.
On the basis of the above, also in order to improve the accuracy of the opening/closing detection, in some embodiments, please continue to refer to fig. 18, after step S700, before step S300, further includes: when the alternating signal is received by a second preset area of the touch screen, the frequency of the alternating signal received by the second preset area is obtained to obtain a second frequency. Referring to fig. 18, this step may be included in step S200 described above. Specifically, the frequency of the alternating signal received by the second preset area may be obtained after the frequency of the alternating signal received by the first preset area is obtained, or may be obtained before the frequency of the alternating signal received by the first preset area is obtained, or may be performed simultaneously with the obtaining of the frequency of the alternating signal received by the first preset area, which is not limited herein.
After the step S200, before the step S300, the control method further includes: and judging whether the second frequency is in a second preset frequency range. Referring to fig. 18, this step may be included in step S601 described above. Specifically, the determining whether the second frequency is located in the second preset frequency range may be performed after determining whether the first frequency is located in the first preset frequency range, or may be performed before determining whether the first frequency is located in the first preset frequency range, or may be performed simultaneously with determining whether the first frequency is located in the first preset frequency range, which is not limited herein.
In the above embodiment, the second preset frequency range includes the frequency of the second alternating signal emitted by the above second emitter electrode 24 b. For example, the frequency of the second alternating signal emitted by the second emitting electrode 24b is 200Hz, and the second preset frequency range may be (200-10) Hz to (200+10) Hz, that is, 190Hz to 210Hz. The second preset frequency range may be the same as the first preset frequency range or different from the first preset frequency range, and is not particularly limited herein.
On the basis of the above, step S300 includes: when the first frequency is in the first preset frequency range and the second frequency is in the second preset frequency range, a first capacitance value of the first preset area is obtained.
In this way, when the first frequency is within the first preset frequency range and the second frequency is within the second preset frequency range, the capacitance value of the first preset area is obtained again, and the following operation is performed, so that the accuracy of detecting the opening and closing cover can be improved, and unnecessary control steps are avoided.
On the basis of the above, referring to fig. 18, after step S800, before step S400, the control method further includes: and when the second frequency is in a second preset frequency range, acquiring a second capacitance value of a second preset area. Referring to fig. 18, this step may be included in the above step S300. Specifically, the capacitance value of the second preset area may be obtained after the capacitance value of the first preset area is obtained, or may be obtained before the capacitance value of the first preset area is obtained, or may be performed simultaneously with the obtaining of the capacitance value of the first preset area, which is not limited herein.
The second capacitance value of the second preset area refers to: and an average value of capacitance values of the capacitors in the second preset area.
On the basis of the above, step S400 includes: and transmitting a control signal according to the first capacitance value and the second capacitance value.
In this way, the control signal is sent according to the first capacitance value and the second capacitance value, so that control accuracy can be improved.
On the basis of the above, in order to avoid the detection accuracy from being reduced due to the tilt angle of the keyboard body 21 portion of the keyboard 20 where the first transmitting electrode 24a or the second transmitting electrode 24b is located, in some embodiments, please refer to fig. 19, fig. 19 is a specific flowchart of step S400 in the control method of the display device 10 shown in fig. 18. The step S401 includes: and when the first capacitance value is greater than or equal to a first preset threshold value and/or the second capacitance value is greater than or equal to a third preset threshold value, transmitting the first control signal. The step S402 includes: and when the first capacitance value is smaller than or equal to a second preset threshold value and/or the second capacitance value is smaller than or equal to a fourth preset threshold value, transmitting the second control signal. The third preset threshold value and the fourth preset threshold value are preset fixed values, the values of which can be determined according to the actual situation, and the third preset threshold value is larger than the fourth preset threshold value.
In this way, as long as the capacitance value of one of the first preset area and the second preset area satisfies the preset condition, the control signal can be sent, and the problem of reduced detection accuracy caused by the occurrence of a tilt angle in the portion of the keyboard main body 21 where the first transmitting electrode 24a or the second transmitting electrode 24b is located can be avoided.
With continued reference to fig. 19, step S400 further includes: when the first capacitance value is smaller than the first preset threshold value and larger than the second preset threshold value, and the second capacitance value is smaller than the third preset threshold value and smaller than the fourth preset threshold value, the touch screen maintains the last state.
Specifically, when the display system is in an on state, the first capacitance value is smaller than or equal to a second preset threshold value, and/or the second capacitance value is smaller than or equal to a fourth preset threshold value, and at this time, the touch screen of the display device is in a bright screen state. Then, in the process of closing the display system, the first capacitance value gradually increases along with the reduction of the included angle between the display device and the keyboard main body. When the first capacitance value is greater than the second preset threshold value and less than the first preset threshold value, and the second capacitance value is greater than the fourth preset threshold value and less than the third preset threshold value, the touch screen of the display device is maintained in the last state (namely, the bright screen state). And then, when the first capacitance value is increased to be greater than or equal to a first preset threshold value, and/or the second capacitance value is increased to be greater than or equal to a third preset threshold value, a first control signal is sent to control the touch screen to be turned off so as to enter a dormant state.
In contrast to the above procedure, when the display system is in the closed state, the first capacitance value is greater than or equal to the first preset threshold value, and/or the second capacitance value is increased to be greater than or equal to the third preset threshold value, and at this time, the touch screen of the display device is in the off-screen state. Then, in the process of uncovering the display system, the first capacitance value gradually decreases along with the increase of the included angle between the display device and the keyboard main body. When the first capacitance value is smaller than the first preset threshold value and larger than the second preset threshold value, and the second capacitance value is smaller than the third preset threshold value and larger than the fourth preset threshold value, the touch screen of the display device is maintained in the last state (namely, the screen-off state). And then, when the first capacitance value is reduced to be smaller than or equal to a second preset threshold value, and/or the second capacitance value is reduced to be smaller than or equal to a fourth preset threshold value, a second control signal is sent to control the touch screen to lighten so as to enter a lightening state.
In some embodiments, step S403 further comprises: and judging the magnitude relation between the second capacitance value and the third preset threshold value and the magnitude relation between the second capacitance value and the fourth preset threshold value. Specifically, the determining of the magnitude relation between the second capacitance value and the third preset threshold value and the fourth preset threshold value may be performed after the determining of the magnitude relation between the first capacitance value and the first preset threshold value and the second preset threshold value, or may be performed simultaneously with the determining of the magnitude relation between the first capacitance value and the first preset threshold value and the magnitude relation between the first capacitance value and the second preset threshold value before the determining of the magnitude relation between the first capacitance value and the first preset threshold value and the magnitude relation between the first capacitance value and the second preset threshold value.
Some embodiments of the present application also provide a computer storage medium including, but not limited to, a usb disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic or optical disk, and other various media in which program codes may be stored. The computer storage medium includes computer instructions that, when executed on the display device 10, cause the display device 10 to perform the control method described in any of the embodiments above.
Some embodiments of the present application also provide a computer program product which, when run on a computer, causes the computer to perform the control method of any of the embodiments described above.
The computer storage medium or the computer program product provided in the embodiments of the present application are used to execute the control method described in any of the embodiments, so that the beneficial effects achieved by the computer storage medium or the computer program product can refer to the beneficial effects provided in the corresponding control method, and are not described herein.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (26)

1. The keyboard is characterized by comprising a keyboard main body, a supporting piece, a first transmitting electrode and a signal generating circuit;
the support piece is rotatably connected with the keyboard main body so as to enable the keyboard to rotate between an open state and a closed state, and is used for supporting and fixing display equipment, and the display equipment comprises a capacitive touch screen;
the first transmitting electrode is arranged in the keyboard main body, the signal generating circuit is electrically connected with the first transmitting electrode, the signal generating circuit is used for generating a first alternating signal, the first transmitting electrode is used for converting the first alternating signal into an electromagnetic wave signal and transmitting the electromagnetic wave signal, and the electromagnetic wave signal is used for enabling the capacitance of a region corresponding to the first transmitting electrode on the touch screen to change when the keyboard rotates between the open state and the closed state.
2. The keyboard of claim 1, wherein the signal generation circuit comprises a first controller;
the first controller is electrically connected with the first transmitting electrode, and the first controller is used for generating the first alternating signal.
3. The keyboard of claim 2, further comprising a first external port;
the first external port is arranged on the supporting piece, the first external port is electrically connected with the first controller, and the first external port is used for externally connecting display equipment.
4. The keyboard of claim 2, wherein the keyboard body comprises a keyboard module;
the keyboard module is electrically connected with the first controller.
5. The keyboard of claim 1, wherein the signal generation circuit comprises an RC oscillating circuit;
the RC oscillation circuit is electrically connected with the first transmitting electrode and is used for generating the first alternating signal.
6. The keyboard of any one of claims 1-5, further comprising a signal driving circuit;
the signal driving circuit is connected between the signal generating circuit and the first transmitting electrode, and is used for amplifying the first alternating signal generated by the signal generating circuit and outputting the amplified first alternating signal to the first transmitting electrode.
7. The keyboard of any one of claims 1-5, wherein the keyboard body comprises a keyboard surface, and wherein an orthographic projection area of the first transmitting electrode on the keyboard surface is greater than or equal to 25mm 2 And less than or equal to 1600mm 2 。
8. The keyboard of any of claims 1-5, wherein the first alternating signal has an amplitude greater than or equal to 3V and less than or equal to 10V.
9. The keyboard of any of claims 1-5, wherein the first alternating signal has a frequency greater than or equal to 100KHz and less than or equal to 400KHz.
10. The keyboard of any of claims 1-5, wherein the first alternating signal is a square wave signal or a sinusoidal signal.
11. The keyboard of any one of claims 1-5, further comprising a rotational connection;
the rotary connecting structure is connected between the supporting piece and the keyboard main body, and the supporting piece is rotatably connected with the keyboard main body by virtue of the rotary connecting structure; the first transmitting electrode is arranged at one end part of the keyboard main body, which is far away from the rotating connection structure.
12. The keyboard of claim 11, further comprising a second emitter electrode;
the signal generating circuit is further electrically connected with the second transmitting electrode, the signal generating circuit is further used for generating a second alternating signal, the second transmitting electrode is used for transmitting the second alternating signal, and the second transmitting electrode is arranged at the end part of the keyboard main body, which is close to the rotating connection structure.
13. A display system comprising a display device and a keyboard as claimed in any one of claims 1 to 12;
the display device is supported and fixed on a support of the keyboard.
14. The display system of claim 13, wherein the display device comprises a touch screen, the touch screen being a capacitive touch screen.
15. A control method of a display device, characterized in that the display device is adapted to be supported and fixed on a support of a keyboard according to any one of claims 1-12, the display device comprising a capacitive touch screen;
the control method comprises the following steps:
the touch screen receives alternating signals;
when a first preset area of the touch screen receives an alternating signal, acquiring the frequency of the alternating signal received by the first preset area to obtain a first frequency; the first preset area is a partial area of the touch screen corresponding to a first transmitting electrode of the keyboard;
When the first frequency is in a first preset frequency range, a first capacitance value of a first preset area is obtained; wherein the first preset frequency range includes a frequency of a first alternating signal emitted by the first emitter electrode;
and sending a control signal according to the first capacitance value.
16. The control method according to claim 15, wherein the transmitting a control signal according to the first capacitance value includes:
when the first capacitance value is larger than or equal to a first preset threshold value, a first control signal is sent;
when the first capacitance value is smaller than or equal to a second preset threshold value, a second control signal is sent;
wherein the first preset threshold is greater than the second preset threshold.
17. The control method of claim 16, wherein the first control signal is used to control the touch screen to deactivate;
the second control signal is used for controlling the touch screen to lighten.
18. The control method of claim 17, wherein the transmitting a control signal according to the first capacitance value further comprises:
and when the first capacitance value is smaller than the first preset threshold value and larger than the second preset threshold value, the touch screen maintains the last state.
19. The control method according to claim 15, wherein after the touch screen receives the alternating signal, before acquiring the frequency of the alternating signal received by the first preset area, the control method further comprises:
judging whether a second preset area of the touch screen receives an alternating signal or not;
when a first preset area of the touch screen receives an alternating signal, acquiring the frequency of the alternating signal received by the first preset area to obtain a first frequency, wherein the method comprises the following steps of:
when alternating signals are received by a first preset area and a second preset area of the touch screen, acquiring the frequency of the alternating signals received by the first preset area to obtain a first frequency.
20. The control method according to claim 19, wherein after determining whether the second preset area of the touch screen receives the alternating signal, before acquiring the capacitance value of the first preset area, the control method further comprises:
when a second preset area of the touch screen receives an alternating signal, acquiring the frequency of the alternating signal received by the second preset area to obtain a second frequency;
when the first frequency is within a first preset frequency range, acquiring a first capacitance value of the first preset area includes:
When the first frequency is in a first preset frequency range and the second frequency is in a second preset frequency range, a first capacitance value of the first preset area is obtained.
21. The control method according to claim 20, wherein after acquiring the frequency of the alternating signal received by the second preset area to obtain the second frequency, the control method further comprises:
when the second frequency is in a second preset frequency range, acquiring a second capacitance value of the second preset area;
according to the first capacitance value, sending a control signal, including:
and sending a control signal according to the first capacitance value and the second capacitance value.
22. The control method of claim 21, wherein transmitting a control signal based on the first capacitance value and the second capacitance value comprises:
when the first capacitance value is greater than or equal to a first preset threshold value and/or the second capacitance value is greater than or equal to a third preset threshold value, a first control signal is sent;
when the first capacitance value is smaller than or equal to a second preset threshold value and/or the second capacitance value is smaller than or equal to a fourth preset threshold value, a second control signal is sent;
Wherein the first preset threshold is greater than the second preset threshold, and the third preset threshold is greater than the fourth preset threshold.
23. The control method of claim 15, wherein the operating time slots of the touch screen include touch detection time slots including noise detection time slots, the touch screen receiving alternating signals, comprising:
the touch screen receives alternating signals in noise detection time slots.
24. The control method of claim 23, wherein the touch detection time slot further comprises a finger detection time slot or a pen identification time slot.
25. The control method according to claim 23 or 24, wherein the operation time slots of the touch screen include alternate operation time slots, which are sequentially alternately arranged by a display time slot and the touch detection time slot.
26. A computer storage medium comprising computer instructions which, when run on a display device, cause the display device to perform the control method of any of claims 15-25.
CN202210955027.0A 2022-08-10 2022-08-10 Keyboard, display system and control method of display equipment Active CN115033116B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210955027.0A CN115033116B (en) 2022-08-10 2022-08-10 Keyboard, display system and control method of display equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210955027.0A CN115033116B (en) 2022-08-10 2022-08-10 Keyboard, display system and control method of display equipment

Publications (2)

Publication Number Publication Date
CN115033116A CN115033116A (en) 2022-09-09
CN115033116B true CN115033116B (en) 2023-07-25

Family

ID=83131086

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210955027.0A Active CN115033116B (en) 2022-08-10 2022-08-10 Keyboard, display system and control method of display equipment

Country Status (1)

Country Link
CN (1) CN115033116B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2503495A1 (en) * 1981-04-03 1982-10-08 Commissariat Energie Atomique Capacitative touch operated keyboard immune to interference - uses reception electrode signal difference to generate noise free output signal and interference level detection to inhibit key pad operation
CN108205360A (en) * 2017-12-18 2018-06-26 中兴通讯股份有限公司 Method, apparatus, terminal and the storage medium of control terminal screen
CN112136093A (en) * 2018-11-30 2020-12-25 华为技术有限公司 Method for controlling opening and closing of screen, device for controlling opening and closing of screen and electronic equipment
CN112698733A (en) * 2021-03-24 2021-04-23 深圳市智信新信息技术有限公司 Wireless keyboard
CN113922513A (en) * 2021-03-26 2022-01-11 荣耀终端有限公司 Wireless charging device and electronic equipment
CN114465366A (en) * 2021-07-15 2022-05-10 荣耀终端有限公司 Wireless charging method and electronic equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2157039A1 (en) * 1993-02-26 1994-09-01 Arvin D. Danielson Portable work station and data collection terminal including switchable multi-purpose touch screen display
US9606667B2 (en) * 2009-06-29 2017-03-28 Japan Display Inc. Method of driving touch panel, capacitance-type touch panel, and display apparatus with touch detection function
FR3013472B1 (en) * 2013-11-19 2016-07-08 Fogale Nanotech COVERING ACCESSORY DEVICE FOR AN ELECTRONIC AND / OR COMPUTER PORTABLE APPARATUS, AND APPARATUS EQUIPPED WITH SUCH AN ACCESSORY DEVICE
US10394332B2 (en) * 2016-04-07 2019-08-27 Microchip Technology Germany Gmbh Sensor design for enhanced touch and gesture decoding

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2503495A1 (en) * 1981-04-03 1982-10-08 Commissariat Energie Atomique Capacitative touch operated keyboard immune to interference - uses reception electrode signal difference to generate noise free output signal and interference level detection to inhibit key pad operation
CN108205360A (en) * 2017-12-18 2018-06-26 中兴通讯股份有限公司 Method, apparatus, terminal and the storage medium of control terminal screen
CN112136093A (en) * 2018-11-30 2020-12-25 华为技术有限公司 Method for controlling opening and closing of screen, device for controlling opening and closing of screen and electronic equipment
CN112698733A (en) * 2021-03-24 2021-04-23 深圳市智信新信息技术有限公司 Wireless keyboard
CN113922513A (en) * 2021-03-26 2022-01-11 荣耀终端有限公司 Wireless charging device and electronic equipment
CN114465366A (en) * 2021-07-15 2022-05-10 荣耀终端有限公司 Wireless charging method and electronic equipment

Also Published As

Publication number Publication date
CN115033116A (en) 2022-09-09

Similar Documents

Publication Publication Date Title
US10817031B2 (en) Multiple mode display apparatus
US8362910B2 (en) Digital electronic apparatus
EP0587162B1 (en) Information processing apparatus
US10983570B1 (en) Keyboard charging from an information handling system
US6865075B2 (en) Transformable computing apparatus
US8344995B2 (en) Portable electronic device and illumination controlling method thereof
US5109354A (en) Electronic system pocketbook apparatus
US10990204B1 (en) Virtual touchpad at keyboard location
US8493371B2 (en) Dynamic brightness range for portable computer displays based on ambient conditions
GB2546871A (en) Charging stylus inside hinge of portable computing device
JP2007102759A (en) Display system
US10929016B1 (en) Touch calibration at keyboard location
CN208890404U (en) Electronic equipment
US20180129307A1 (en) Touch control system and method for determining tilt state of stylus device
CN115033116B (en) Keyboard, display system and control method of display equipment
US10983567B1 (en) Keyboard magnetic guard rails
US9128670B2 (en) Removable battery of computing device
US20030095114A1 (en) Touch pen with illuminating unit for computerized apparatus
KR20170047139A (en) Electronic device with large capacity battery
CN116048246A (en) Display assembly and control method of display device
CN109031734A (en) Driving method, device, photochromic component and the electronic equipment of photochromic component
CN115566747B (en) Wireless charging system
CN102214058B (en) Handwriting input electronic equipment
CN114201059A (en) Active stylus, charging method thereof and mobile operation device applying active stylus
US20210173513A1 (en) Display device and portable device having the same

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant