CN115033116A - Keyboard, display system and control method of display equipment - Google Patents

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

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Publication number
CN115033116A
CN115033116A CN202210955027.0A CN202210955027A CN115033116A CN 115033116 A CN115033116 A CN 115033116A CN 202210955027 A CN202210955027 A CN 202210955027A CN 115033116 A CN115033116 A CN 115033116A
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China
Prior art keywords
keyboard
signal
touch screen
preset
capacitance value
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Granted
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CN202210955027.0A
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Chinese (zh)
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CN115033116B (en
Inventor
张伟
齐骞
张友军
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Honor Device Co Ltd
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Honor Device Co Ltd
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    • 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

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  • 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 the design difficulty of the display equipment while realizing the detection of an opening and closing cover. The keyboard comprises a keyboard main body, a supporting piece, a first transmitting electrode and a signal generating circuit. The supporting piece is rotatably connected with the keyboard main body. The first emitting electrode is arranged in the keyboard main body, the signal generating circuit is electrically connected with the first emitting electrode, the signal generating circuit is used for generating a first alternating signal, and the first emitting electrode is used for receiving the first alternating signal and emitting a second alternating signal. The keyboard provided by the application is used for protecting the display equipment and facilitating the user to output data and instructions.

Description

Keyboard, display system and control method of display equipment
Technical Field
The present application relates to the field of display technologies, and in particular, to a keyboard, a display system, and a control method for a display device.
Background
At present, a display device user 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 the leather sheath keyboard to prevent collision and scratching. In order to achieve the purpose of energy conservation, when the leather sheath keyboard is covered, the screen of the display device is turned off and enters a dormant state, so that the power consumption is saved; when the leather sheath keyboard is opened, the screen automatically lights and wakes up to realize the display function.
In order to detect the closing and opening of the leather sheath keyboard, a Hall sensor is usually arranged in a display device, a magnet is arranged in the leather sheath keyboard, and the Hall sensor senses the approaching or the leaving of the magnet, so that the purposes of closing and opening the leather sheath keyboard are achieved. However, in this solution, the hall sensor needs to be placed in the display device, and not all users have the requirement of using the leather sheath keyboard, so that the built-in hall sensor is unnecessary for the part of users, which causes the cost of the display device to increase, thereby generating waste. In addition, the magnet arranged in the keyboard can also influence the detection precision of the compass in the display equipment, and the design difficulty of the display equipment is increased.
Disclosure of Invention
The embodiment of the application provides a keyboard, a display system and a control method of display equipment, and aims to solve the problems that how to reduce the cost and the design difficulty of the display equipment while realizing the detection of an opening and closing cover.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:
in a first aspect, a keyboard is provided that includes a keyboard body, a support, a first emitter electrode, and a signal generating circuit. The supporting piece is rotatably connected with the keyboard body. The support member is used for supporting and fixing the display device. The first emitting electrode is arranged in the keyboard main body, the signal generating circuit is electrically connected with the first emitting electrode, the signal generating circuit is used for generating a first alternating signal, and the first emitting electrode is used for emitting 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 with the first emitter electrode. Based on this, on the premise that the display device comprises the touch screen, the touch screen is a capacitive touch screen, and when the keyboard is opened or closed, the first alternating signal is far away from or close to the touch screen, so that the capacitance of the touch module in the touch screen is changed. Therefore, the cover opening and closing detection can be realized by means of the touch module in the touch screen, a detection structure does not need to be additionally arranged in the display equipment, and therefore the cost of the display equipment cannot be increased. Meanwhile, the first emitting electrode emits alternating signals, so that the performance of a compass in the display device is not influenced, and the design difficulty of the display device can be reduced.
In one possible implementation form of the first aspect, the signal generating circuit comprises a first controller. In some embodiments, the first controller is a micro control unit, which is also called a microcomputer or a single chip microcomputer, and the first controller is electrically connected to the first emitting 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, electrically connected with the first controller and used for externally connecting the display equipment. The display equipment can be adopted to supply power to the first controller, the communication connection between the display equipment and the first controller is established, a power supply and a communication device do not need to be independently arranged in the keyboard, and the reduction of the structural complexity and the cost of the keyboard is facilitated.
In one possible implementation manner of the first aspect, the keyboard main body includes a keyboard module. The keyboard module is electrically connected with the first controller. Therefore, the keyboard generates the first alternating signal by the first controller for controlling the keyboard module, and the structural complexity and the cost can be reduced.
In one possible implementation form of the first aspect, the signal generating circuit comprises an RC oscillating circuit. The RC oscillating circuit is electrically connected with the first emitting electrode and is used for generating the first alternating signal. The RC oscillation circuit is a commonly used structure for generating an alternating signal, and thus is easy to implement.
In one 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. In this way, the amplitude of the first alternating signal can be increased to a certain range (for example, between 3v and 10 v) to ensure the accuracy of the detection of the opening and closing cover.
In one possible implementation manner of the first aspect, the keyboard body comprises a keyboard surface, and an orthographic projection area of the first transmitting electrode on the keyboard surface is greater than or equal to 25mm 2 And is less than or equal to 1600mm 2 . Specifically, the orthographic projection area of the first emitting electrode on the keyboard surface can be 25mm 2 、30mm 2 、50mm 2 、80mm 2 、100mm 2 、500mm 2 、1000mm 2 Or 1600mm 2 . Therefore, 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, an orthographic projection of the first emitting electrode on the keyboard surface may be a square, a circle, a rectangle, an ellipse, a triangle, a polygon, a heart shape, or a W shape, an L shape, an H shape, an M shape, or the like. In a possible implementation manner, the orthographic projection of the first emitting 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 the capacitance of the corresponding irregular area of the touch module in the display device to change. Specifically, when the orthographic projection of the first emitting electrode on the keyboard surface is in a W shape, the capacitance of W-shaped areas with equal touch modules in the display equipment is caused to change; when the orthographic projection of the first emitting electrode on the keyboard surface is L-shaped, the capacitance of an L-shaped area with the same size of a touch module in the display equipment can be caused to change; when the orthographic projection of the first emitting electrode on the keyboard surface is in an H shape, the capacitance of an H-shaped area with the same size of a touch module in the display equipment is caused to change; when the orthographic projection of the first emitting electrode on the keyboard surface is in an M shape, the capacitance of M-shaped areas with the same size of the touch module in the display equipment can be 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 one possible implementation form 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. In particular, the amplitude of the first alternating signal may be 3V, 4V, 5V, 6V, 7V, 8V, 9V or 10V. Thus, the detection accuracy and the cost of the display device can be simultaneously considered.
In one possible implementation form of the first aspect, the frequency of the first alternating signal is greater than or equal to 100KHz and less than or equal to 400 KHz. Specifically, the frequency of the first alternating signal may be 100KHz, 200KHz, 300KHz, or 400 KHz. Therefore, the requirements on related circuits and electronic components are low, the cost is low, and the realization is easy.
In one possible implementation manner of the first aspect, the keyboard further includes a rotation connection structure. The rotating connecting structure is connected between the supporting piece and the keyboard body, and the supporting piece and the keyboard body are rotatably connected through the rotating connecting structure. The first emitting electrode is arranged at one end part of the keyboard main body far away from the rotating connecting structure. Therefore, in the process of opening or closing the cover, the stroke of the first emitting electrode relative to the movement of the display equipment is large, and in the process of opening or closing the cover, the linear velocity of the movement of the first emitting electrode is small and the detection sensitivity is high on the premise that the rotation angular velocity of the keyboard main body relative to the display equipment is constant.
In one possible implementation form of the first aspect, the keyboard further comprises a second transmitting electrode. The signal generating circuit is also electrically connected with the 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 the end part of one end of the keyboard main body, which is close to the rotating connecting structure. Therefore, the capacitance value change of the area opposite to the first emitting electrode and the area opposite to the second emitting electrode on the touch screen can be detected, the cover opening and closing detection is realized, and the detection accuracy can be improved. Meanwhile, when the end part of one end of the keyboard main body, which is far away from the rotating connection structure, generates a tilting foot, the opening and closing cover detection can be realized by detecting the capacitance value change of the area, opposite to the second transmitting electrode, on the touch screen.
In a second aspect, there is provided a 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.
Since the display system provided by the application comprises the keyboard according to any one of the above technical solutions, the two can solve the same problem and achieve the same effect.
In one 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 method for controlling 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 an alternating signal; 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 within a first preset frequency range, acquiring a first capacitance value of the first preset area; and sending a control signal according to the first capacitance value.
Wherein, the first preset area is as follows: when the display device is supported and fixed on the supporting member of the keyboard according to any one of the above technical solutions, a partial region of the touch screen corresponding to the first emitter electrode. Here, "correspond" indicates a partial region of the touch screen opposite to the first transmission electrode when the display device is supported and fixed on the support member of the keyboard and the keyboard is in a closed state. When the display device is supported and fixed on the supporting member of the keyboard and the keyboard is in a closed state, an orthographic projection area of the first emitting electrode on the touch screen is defined as a first projection area, the first preset area can be overlapped with the first projection area, can also cover the first projection area, and the edge of the first preset area is positioned outside the edge of the first projection area and can also be positioned in the first projection area. Meanwhile, the shape of the first preset region may be the same as that of the first projection region, specifically, when the shape of the first projection region is square, the shape of the first preset region is also square; when the first projection area is rectangular, the first preset area is also rectangular; when the first projection area is in an irregular shape such as a W shape, an L shape, an H shape, an M shape, etc., the first predetermined area is also in an irregular shape such as a W shape, an L shape, an H shape, an M shape, etc. In some embodiments, the first predetermined 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 5 mm. 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 the position coincides with the edge of the first projection area.
In addition, the first capacitance value of the first predetermined area is: and the average value of the capacitance values of the capacitors in the first preset area.
Therefore, the display equipment realizes the cover opening and closing detection by means of the touch screen without changing the hardware structure of the display equipment, so that the cost is lower.
In one possible implementation manner of the third aspect, the transmitting the 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, sending a first control signal; when the first capacitance value is smaller than or equal to a second preset threshold value, sending a second control signal; the first preset threshold is larger 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 go out (i.e., to go out) to enter a sleep state; the second control signal is used for controlling the touch screen to be lightened so as to wake up the touch screen. Like this, can be when display system is in the closed condition for display device keeps in the dormancy state, and when display system was in the open mode, awaken the touch-sensitive screen up, in order to realize showing the function, promote from this and use the convenience, save 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 limited herein.
In a possible implementation manner of the third aspect, the transmitting the control signal according to the first capacitance value 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 open state, the first capacitance value is less 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. And then, in the process of closing the cover of the display system, along with the reduction of an included angle between the display equipment and the keyboard main body, the first capacitance value is gradually increased. 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 larger than or equal to a first preset threshold value, sending a first control signal to control the touch screen to be turned off. Contrary to the above process, 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 at this time, the touch screen of the display device is in the screen-off state. And then, in the uncovering process of the display system, the first capacitance value is gradually reduced along with the increase of an 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 screen-off state). And then, when the first capacitance value is reduced to be smaller than or equal to a second preset threshold value, sending a second control signal to control the touch screen to be lightened so as to enter a lightening state.
In a possible implementation manner of the third aspect, after the touch screen receives the alternating signal, and before the frequency of the alternating signal received by the first preset area is acquired, the control method further includes: and judging whether the second preset area of the touch screen receives the alternating signal. On this basis, 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, including: when the first preset area and the second preset area of the touch screen 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. Therefore, after the alternating signals are detected in the first preset area and the second preset area simultaneously, the frequency is acquired, the following operations are carried out, the accuracy of cover opening and closing detection can be improved, and unnecessary control steps are avoided.
Wherein, the second preset area is: when the display device is supported and fixed on the support member of the keyboard according to any of the above technical solutions, a partial region of the touch screen corresponding to the second transmitting electrode. Here, "corresponds to" indicates a partial region of the touch screen opposite to the second transmission electrode when the display device is supported and fixed on the support member of the keyboard and the keyboard is in the closed state. When the display device is supported and fixed on the supporting member 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, the second preset area can be overlapped with the second projection area, can also cover the second projection area, and the edge of the second preset area is positioned outside the edge of the second projection area and can also be positioned in the second projection area. Meanwhile, the shape of the second preset region may be the same as the shape of the second projection region, specifically, when the shape of the second projection region is square, the shape of the second preset region 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 second projection area is irregular in shape such as W-shape, L-shape, H-shape, M-shape, etc., the second predetermined area is also irregular in shape 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 located 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 5 mm. It should be noted that, when the minimum distance between the edge of the second predetermined region and the edge of the second projection region is equal to 0mm, the edge of the second predetermined region at the position coincides with the edge of the second projection region.
In a possible implementation manner of the third aspect, 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 includes: when the second preset area of the touch screen receives the alternating signal, the frequency of the alternating signal received by the second preset area is obtained to obtain a second frequency. On this basis, when the first frequency is within the first preset frequency range, acquiring a first capacitance value of the first preset region, including: when the first frequency is within a first preset frequency range and the second frequency is within a second preset frequency range, a first capacitance value of the first preset area is obtained. Therefore, 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, and the following operations are carried out, so that the accuracy of cover opening and closing detection can be improved, and unnecessary control steps are avoided.
In a possible implementation manner of the third aspect, after obtaining 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 within a second preset frequency range, acquiring a second capacitance value of a second preset area. On the basis, according to the first capacitance value, the control signal is sent, and the method comprises the following steps: and sending a control signal according to the first capacitance value and the second capacitance value. In this way, the control signal is transmitted according to the first capacitance value and the second capacitance value, and the control accuracy can be improved.
Wherein, the second capacitance value of the second predetermined area means: and the average value of the capacitance values of all the capacitors in the second preset area.
In a possible implementation manner of the third aspect, the transmitting the control signal according to the first capacitance value and the second capacitance value includes: and when the first capacitance value is larger than or equal to a first preset threshold value and/or the second capacitance value is larger 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 is larger than the second preset threshold, and the third preset threshold is larger than the fourth preset threshold. Therefore, 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 keyboard main body part where the first transmitting electrode or the second transmitting electrode is located generates the tilt angle can be avoided.
In a possible implementation manner of the third aspect, when the first capacitance value is smaller than the first preset threshold and larger than the second preset threshold, and the second capacitance value is smaller than the third preset threshold and smaller than the fourth preset threshold, the touch screen maintains the previous state. Specifically, when the display system is in an open state, the first capacitance value is less than or equal to a second preset threshold value, and/or the second capacitance value is less 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. And then, in the process of closing the cover of the display system, along with the reduction of an included angle between the display equipment and the keyboard main body, the first capacitance value is gradually increased. When the first capacitance value is greater than the second preset threshold value and smaller than the first preset threshold value, and the second capacitance value is greater than the fourth preset threshold value and smaller than the third preset threshold value, the touch screen of the display device is maintained in the previous state (i.e., the bright screen state). And then, when the first capacitance value is increased to be larger than or equal to a first preset threshold value and/or the second capacitance value is increased to be larger than or equal to a third preset threshold value, sending a first control signal to control the touch screen to be turned off so as to enter a sleep state. Contrary to the above process, 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, at this time, the touch screen of the display device is in the screen-off state. And then, in the uncovering process of the display system, the first capacitance value is gradually reduced along with the increase of an 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 previous state (i.e., the screen-off state). And then, when the first capacitance value is reduced to be less than or equal to a second preset threshold value and/or the second capacitance value is reduced to be less than or equal to a fourth preset threshold value, sending a second control signal to control the touch screen to be lightened so as to enter a lightening state.
In a possible implementation manner of the third aspect, the operating 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 receiving of the alternating signal by the touch screen includes: the touch screen receives an alternating signal during 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 working time slots of the touch screen include alternate working time slots, and the alternate working time slots are sequentially and alternately set by the display time slot and the touch detection time slot. 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 one chip, so that the display equipment is simple in structure, low in cost and high in integration degree.
In a fourth aspect, a computer storage medium is provided, which includes computer instructions that, when run on a display device, cause the display device to perform the control method according to any one of the above technical solutions.
In a fifth aspect, a computer program product is provided, which when run on a computer causes the computer to execute the control method according to any of the above claims.
The computer storage medium or the computer program product provided in the embodiments of the present application are both used to execute the control method according to any of the above technical solutions, and therefore, beneficial effects that can be achieved by the computer storage medium or the computer program product may 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 by some embodiments of the present application;
FIG. 2 is an exploded view of the display system shown in FIG. 1;
FIG. 3 is a schematic view of the display system of FIG. 1 in a closed position;
FIG. 4 is a schematic diagram of a display system according to still other embodiments of the present application;
FIG. 5 is a schematic diagram of a display system according to still other embodiments of the present application;
FIG. 6 is a schematic structural diagram of the display system shown in FIG. 5 after the keyboard module is hidden in the keyboard;
FIG. 7 is a schematic cross-sectional view of a display device according to some embodiments of the present application;
FIG. 8 is a state diagram of a display system during a cover closing process according to some embodiments of the present application; wherein, fig. 8 (a) is a schematic structural diagram showing the system in the cover closing process; fig. 8 (b) is a graph of the intensity of the signal (voltage signal u) emitted by the first emitter electrode as a function of time t; fig. 8 (C) is a graph showing a variation curve of the capacitance C of the portion of the display device where the touch module is opposite to the first emitter electrode along with the included angle θ 3;
FIG. 9 is a state diagram of a display system during a decapping process according to some embodiments of the present application; fig. 9 (a) is a schematic structural diagram showing a system in an uncapping process; fig. 9 (b) is a graph of the intensity of a signal u emitted from the first emitter electrode as a function of time t; fig. 9 (C) is a graph showing a variation curve of the capacitance C of the portion of the display device where the touch module is opposite to the first emitter electrode along with the included angle θ 3;
FIG. 10 is a schematic diagram of a keyboard according to further embodiments of the present application;
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 internal circuitry of a keyboard according to yet other 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 still other embodiments of the present application;
fig. 17 is a detailed 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 still other embodiments of the present application;
fig. 19 is a detailed flowchart of step S400 in the control method of the display apparatus shown in fig. 18.
Detailed Description
In the embodiments of the present application, the terms "first" and "second" 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 defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the embodiments of the present application, the terms "include", "include" or any other variations are intended to cover non-exclusive inclusions, so that a process, a method, an article, or an apparatus including a series of elements includes not only those elements but also other elements not explicitly listed, or further includes elements inherent to such a process, a method, an article, or an apparatus. Without further limitation, an element defined by the phrase "comprising an … …" 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 only one kind of 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 simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The present application provides a display system. Referring to fig. 1 and fig. 2, fig. 1 is a perspective view of a display system 100 according to some embodiments of the present disclosure, 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 mobile phone, a tablet computer, a laptop computer (laptop computer), a Personal Digital Assistant (PDA), etc., and fig. 1 to fig. 2 and the following embodiments are exemplified by the display device 10 being a tablet computer, which should not be considered as a special limitation to 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 10 b. The display surface 10a includes a display interface for displaying pictures or videos, and the display surface 10a may be used as the display interface as a whole or as a part of the display interface. The back surface 10b is opposite to the display surface 10 a.
The keyboard 20 is used to facilitate a user to input data and instructions to the display device 10, and meanwhile, the keyboard 20 is also used to protect the display device 10 from being knocked and scratched. Specifically, the keyboard 20 includes a keyboard body 21 and a support 22.
In some embodiments, the keyboard body 21 has a substantially rectangular flat plate shape. On this basis, for convenience of description of the embodiments to be described later, an XYZ coordinate system is established, and the longitudinal direction of the keyboard main body 21 is defined as the X-axis direction, the width direction of the keyboard main body 21 is defined as the Y-axis direction, and the thickness direction of the keyboard main body 21 is defined as the Z-axis direction. It is understood that the coordinate system of the keyboard main body 21 can be flexibly set according to actual needs, and is not limited in particular. In other embodiments, the keyboard main body 21 may have a substantially square flat plate shape, a circular flat plate shape, an elliptical flat plate shape, or the like.
The keypad main body 21 includes a keypad housing 211 and a keypad module 212, the keypad housing 211 is used for protecting the internal electronic components, the keypad housing 211 includes a first wall 211a, and the first wall 211a is substantially 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 commands. On this basis, for convenience of the following description of the embodiments, the outer surface of the first wall panel 211a is defined as a keyboard surface a 1.
The support 22 is rotatably connected to the keyboard main body 21. Specifically, the keyboard 20 further includes a rotating connecting structure 23, the rotating connecting structure 23 is connected between the supporting member 22 and the keyboard main body 21, and the supporting member 22 and the keyboard main body 21 are rotatably connected by the rotating connecting structure 23. The rotary connecting structure 23 includes, but is not limited to, a flexible structure such as a rotating shaft and a leather sheath.
The support 22 is used to support and fix the display apparatus 10. The support member 22 may be used to support and fix the display apparatus 10 as a whole, or may be used to support and fix the display apparatus 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 main body 21 by the rotating connection structure 23, and the second supporting member 222 is rotatably connected to the first supporting member 221. The rotation axis between the second support 222 and the first support 221 is substantially parallel to the rotation axis of the rotational connection structure 23. The support 22 supports and fixes the display apparatus 10 by means of the second support 222. Specifically, the manner of fixing the display device 10 by the second support 222 includes, but is not limited to, detachable connection manners such as magnetic attraction type and clamping type. In this way, the display apparatus 10 can be detached from the second support 222 to be used alone.
On the above basis, for convenience of the following description of the embodiments, a surface of the support 22 for supporting and fixing the display apparatus 10 is defined as a supporting surface a 2. 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 fig. 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 connecting structure 23. The display device 10 is provided with a second magnetic attraction structure 10 c. In some embodiments, the first magnetic structure 213 is a magnet, the second magnetic structure 10c includes but is not limited to iron, cobalt, nickel, and the like, and alloys thereof, and the first magnetic structure 213 and the second magnetic structure 10c can be fixed by attraction.
The display system 100 can 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 open angle θ 1 of the first support 221 with respect to the keyboard main body 21 is acute, and the open angle θ 2 of the second support 222 with respect to the keyboard main body 21 is obtuse. The display device 10 is supported and fixed on the second supporting member 222, and the display device 10 is magnetically fixed on the first magnetic structure 213 by the second magnetic structure 10 c. The first magnetic attraction structure 213 and the second magnetic attraction structure 10c can be fixed by other fixing methods, such as a threaded connection, a snap connection, a riveting connection, and the like. In this way, the display device 10, the first support 221 and the keyboard main body 21 form a triangular stable structure, which can support and fix the display device 10 in an inclined position for the convenience of the user.
It should be noted that the structural form of the keyboard 20 is not limited to the structure shown in fig. 1 and fig. 2. When the keyboard 20 has other structures, the keyboard 20 may have other shapes in the opened state, and is not limited in particular.
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 may protect the display device 10 from bumps 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 cover closing process. In the cover closing process, the angle between the display device 10 and the keyboard main body 21 is reduced.
On the basis, for the purpose of saving energy, when it is detected that the display system 100 is in the cover opening process, the screen of the display device 10 is on to realize the display function. When it is detected that the display system 100 is in the cover closing process, the screen of the display device 10 is turned off to enter a sleep state to save power consumption.
To implement the detection of opening and closing the keyboard 20 so as to control the display device 10 to turn on or off the screen, please refer to fig. 4, and fig. 4 is a schematic structural diagram of a display system 100 according to further embodiments of the present application. Wherein the keyboard 20 is in a flattened state. The differences of the display system 100 of the present embodiment compared to the display system 100 shown in fig. 1 include: 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 position where the magnet M is disposed is substantially opposite to the position where the hall sensor H is disposed. The Hall sensor H senses the approaching or departing of the magnet M, so that the purposes of cover opening and cover closing detection are achieved. However, in this solution, the hall sensor H needs to be arranged in the display device 10, and not all users of the display device have the requirement of using the keyboard 20, so that the hall sensor H arranged in the display device 10 is unnecessary for this part of users, which causes the cost of the display device 10 to increase, thereby generating waste. Moreover, in the process of opening and closing the cover, the magnet M arranged in the keyboard main body 21 also affects the detection precision 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 the design difficulty of the display device 10 while implementing the cover opening and closing detection, please refer to fig. 5 and fig. 6, fig. 5 is a schematic structural diagram of a display system 100 according to some embodiments of the present application, and fig. 6 is a schematic structural diagram of a keyboard 20 in the display system 100 shown in fig. 5 after hiding a 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 main 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 emitter electrode 24a is used to emit a first alternating signal to the side toward which the keyboard face a1 is directed. Optionally, the first alternating signal is an alternating voltage signal, including but not limited to a Pulse Width Modulation (PWM) wave signal and a sine wave signal. The first transmitting electrode 24a transmits the first alternating signal means that: 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 in the keyboard main body 21. Specifically, the first emitter electrode 24a may be disposed in the keyboard housing 211 of the keyboard main body 21 to ensure the uniformity of the appearance of the keyboard main body 21. On this basis, at least the portion of the first wall plate 211a facing the first emitter electrode 24a is made of a non-metallic material to avoid interfering with the propagation of the electromagnetic wave signal corresponding to the first alternating signal to the side toward which the keyboard surface a1 faces.
In this way, the first alternating signal can be continuously emitted outward using the first emitter electrode 24 a. Based on this, on the premise that the display device 10 includes a touch screen, which is a capacitive touch screen, when the keyboard 20 is opened or closed, the first alternating signal is far away from or close to the touch screen, which may cause a change in capacitance of a 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, a detection structure does not need to be additionally arranged in the display equipment 10, and therefore the cost of the display equipment cannot be increased. Meanwhile, the first transmitting electrode 24a transmits an alternating signal, which does not affect the performance of the compass in the display device 10, so that the difficulty in designing the display device 10 can be reduced.
The technical effects are further explained in the following by combining the attached drawings.
Referring to fig. 7, fig. 7 is a schematic cross-sectional structure diagram of a display device 10 according to some embodiments of the present disclosure. The display device 10 includes a touch screen 11, a back case 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 stacked in sequence. The transparent cover plate 111 is used for protecting the touch module 112 and the display module 113, and the material of the transparent cover plate 111 includes but is not limited to glass. The touch module 112 is used for detecting a finger or a stylus to simplify human-computer communication. The touch module 112 may be a capacitive touch module, and the capacitance is divided into self capacitance and mutual capacitance. Optionally, the touch module 112 may be a self-capacitance touch module. The display module 113 is used to display 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 (LCD) that cannot self-emit light and needs to be provided with a backlight module to provide backlight.
The back case 12 includes a back cover 121 and a bezel 122. The back cover 121 is located on one side of the display module 113 away from the transparent cover plate 111, the back cover 121 is stacked with the touch screen 11 and arranged at an interval, and the frame 122 is located between the back cover 121 and the transparent cover plate 111 of the touch screen 11 and arranged around the back cover 121. The frame 122 is fixed to the back cover 121. Illustratively, the frame 122 may be fixedly attached to the back cover 121 by an adhesive. The frame 122 may also be formed integrally with the back cover 121, that is, the frame 122 and the back cover 121 are formed as a single integral structure. The touch screen 11 is fixed on the frame 122. In some embodiments, the touch screen 11 may be fixed on the frame 122 by gluing. The touch screen 11, the back cover 121 and the bezel 122 enclose an inner 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 an electronic component 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 panel 11 away from the back cover 121 forms the display surface 10a, and the surface of the back cover 121 away from the touch panel 11 forms the back surface 10 b.
When the display device 10 is applied to the display system 100 and is closed, please refer to fig. 8, where fig. 8 is a state diagram of the display system 100 in a closing process according to some embodiments of the present application. Specifically, fig. 8 (a) is a schematic structural diagram illustrating the system 100 in the cover closing process. During the cover closing process, the display device 10 rotates in the direction a1 relative to the keyboard main body 21, the included angle θ 3 (equal to the aforementioned included angle θ 2) between the display device 10 and the keyboard main 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 strength of the signal (voltage signal u) transmitted by the first transmitting electrode 24a with respect to time t, the amplitude of the first alternating signal is kept constant, in some other embodiments, the amplitude of the first alternating signal may also be changed with respect to time t, and this embodiment and the following embodiments are explained on the basis that the amplitude of the first alternating signal is kept constant. The first alternating signal affects a capacitance value of the touch module 112 in the display device 10, and the closer the distance is, the greater the influence on the capacitance value is. Fig. 8 (C) is a graph showing the variation of the capacitance C of the portion of the display device 10 opposite to the first emitter electrode 24a and the touch module 112 along with the included angle θ 3, in the cover closing process, the included angle θ 3 and the distance decrease with time, the capacitance C of the touch module 112 increases, and the relative position of the display device 10 and the keyboard main body 21 can be determined by detecting the variation of the capacitance C of the touch module 112, so as to implement the cover closing detection.
When the display device 10 is applied to the display system 100 and the cover is opened, please refer 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, and specifically, fig. 9 (a) is a schematic structural diagram of the display system 100 in the process of opening the cover. During the opening of the cover, the display device 10 is rotated in the direction a2 with respect to the keyboard body 21. The angle θ 3 between the display device 10 and the keyboard main body 21 increases, the first transmitting electrode 24a is away from the display device 10, the first transmitting electrode 24a continuously transmits the first alternating signal, and (b) in fig. 9 is a graph of the intensity of the signal u transmitted by the first transmitting electrode 24a with 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 less the capacitance is affected. Fig. 9 (C) is a graph showing the variation of the capacitance C of the portion of the display device 10 opposite to the first emitter electrode 24a and the touch module 112 along with the included angle θ 3, during the uncapping process, the included angle θ 3 and the distance increase along with time, the capacitance variation C of the touch module 112 decreases, and the relative position of the display device 10 and the keyboard main body 21 can be determined by detecting the variation of the capacitance C of the touch module 112, thereby implementing the uncapping detection.
Above-mentioned uncap and close and cover the process, utilize present touch module 112 to realize detecting in display device 10, need not to set up in addition in display device 10 and detect the structure to can not increase display device's cost, what first emitter electrode 24a launched simultaneously is alternating signal, can not exert an influence to the compass performance in display device 10, thereby can reduce display device 10's the design degree of difficulty.
The shape of the first emitter 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 emitter electrode 24a is sheet-like, and the first emitter electrode 24a is substantially parallel to the keyboard surface a1, i.e., the first emitter electrode 24a is substantially parallel to the XY plane. This is advantageous for thinning the keyboard main body 21.
The orthographic projection of the first emitter electrode 24a on the keyboard face a1 may be square, circular, rectangular, oval, triangular, polygonal, heart-shaped, or irregular shapes such as W-shaped, L-shaped, H-shaped, M-shaped, etc. In some embodiments, with continued reference to fig. 5 and 6, the orthographic projection of the first transmitting electrode 24a on the keyboard surface a1 is a square, which is regular and convenient to form. In other embodiments, the orthographic projection of the first emitter electrode 24a on the keyboard surface a1 is in a W shape, an L shape, an H shape, an M shape, etc., which causes the capacitance of the corresponding irregular area of the touch module 112 in the display device 10 to change. Specifically, when the orthographic 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 caused to change; when the orthographic projection of the first emitting electrode 24a on the keyboard surface a1 is in an L shape, the capacitance of the L-shaped area with the same size of the touch module 112 in the display device 10 is caused to change; when the orthographic projection of the first emitting electrode 24a on the keyboard surface a1 is in an H shape, the capacitance of the H-shaped area with the same size of the touch module 112 in the display device 10 is caused to change; when the orthographic projection of the first emitting 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 caused to change. Thus, the capacitance change area on the touch module 112 has a higher identification degree, and the opening and closing detection accuracy of the system can be displayed.
The size of the forward projection area of the first emitter electrode 24a on the keyboard face 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 orthographic projection area is, the more the first transmitting electrode 24a occupies in the keyboard main body 21, which is disadvantageous for installation in the keyboard main body 21 with limited space. In some embodiments, the orthographic area of the first emitter electrode 24a on the keypad surface a1 is greater than or equal to 25 square millimeters (mm) 2 ) And is less than or equal to 1600mm 2 . Specifically, the orthographic projection area of the first emitter electrode 24a on the keyboard face A1 can be 25mm 2 、30mm 2 、50mm 2 、80mm 2 、100mm 2 、500mm 2 、1000mm 2 Or 1600mm 2 . In this way, both the detection accuracy of the display device 10 and the occupied volume of the keyboard main body 21 can be satisfied.
The magnitude of the amplitude of the first alternating signal emitted by the first emitter electrode 24a also affects the detection accuracy of the display device 10. Specifically, the larger the amplitude of the first alternating signal is, the greater the detection accuracy is. However, the larger the amplitude of the first alternating signal, the more complicated the circuit and the more expensive the circuit. 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. In particular, the amplitude of the first alternating signal may be 3V, 4V, 5V, 6V, 7V, 8V, 9V or 10V. In this way, both the detection accuracy and the cost of the display device 10 can be considered.
In some embodiments, the frequency of the first alternating signal is from 100 kilohertz (KHz) to 400 KHz. Specifically, the frequency of the first alternating signal may be 100KHz, 200KHz, 300KHz, or 400 KHz. Therefore, the requirements on related circuits and electronic components are low, the cost is low, and the realization is easy.
In some embodiments, with continued reference to fig. 5 and 6, the first transmitting electrode 24a is disposed at an end of the keyboard main body 21 away from the rotating connection structure 23. Therefore, in the process of opening or closing the cover, the moving stroke of the first transmitting electrode 24a relative to the display device 10 is large, and in the process of opening or closing the cover, on the premise that the rotational angular speed of the keyboard main body 21 relative to the display device 10 is constant, the linear speed of the movement of the first transmitting electrode 24a is small, and the detection sensitivity is high.
However, the keyboard body 21 is prone to generate a tilt angle at an end thereof away from the rotation connecting structure 23 during use, which results in low accuracy of detecting the opening and closing cover. To avoid this problem, in some embodiments, please refer to fig. 10, and 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 keypad 20 includes the second transmitting electrode 24b in addition to the first transmitting electrode 24 a. The structural form of the second emitter electrode 24b may be the same as that of the first emitter electrode 24a, and is not described herein. The second transmitting electrode 24b is for transmitting a second alternating signal. The second alternating signal may also be the same as the first alternating signal described above, and is not described in detail here. In this way, the capacitance change of the area on the touch screen 11 opposite to the first emitter electrode 24a and the capacitance change of the area on the touch screen 11 opposite to the second emitter electrode 24a can be detected to realize the open-close cover detection, and the detection accuracy can be improved.
On this basis, optionally, referring to fig. 10, the second transmitting electrode 24b is disposed at an end portion of the keyboard main body 21 close to the rotating connection structure 23. In this way, when the keyboard main body 21 is tilted away from the end of the rotation connection structure 23, the open/close detection can be similarly realized by detecting the capacitance change in the area of the touch panel 11 facing the second radiation 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 emitter electrode 24 a. The signal generating circuit is used for generating the first alternating signal.
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 in the keypad 20. In some embodiments, the signal generating circuit may be disposed in the keyboard main body 21, and particularly, the signal generating circuit is disposed in the keyboard housing 211 of the keyboard main body 21 to ensure the appearance consistency of the keyboard main body 21. In other embodiments, the signal generating circuit may be disposed on the outer surface of the keyboard housing 211 or on the support 22, which is not limited herein.
The signal generating circuit has various structures, 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 Controller Unit (MCU), which is also called a single chip microcomputer or a single chip microcomputer. The first controller 25 is electrically connected to the first emitter electrode 24a, and the first controller 25 is configured to generate the first alternating signal. On this 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 arranged to generate the second alternating signal as described above. The structure is simple and easy to realize.
On the basis, the first controller 25 is further electrically connected to the keyboard module 212 to control the keyboard module 212. Thus, the controller of the keyboard 20 multiplexing keyboard module 212 provided by the present application generates the first alternating signal, which can reduce the structural complexity and 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 disposed on the support 22. Specifically, the first external connection port 26 may be disposed on the support surface a 2. The first external port 26 is electrically connected to the first controller 25. The first external port 26 is used for externally connecting the display device 10.
On the basis of the above embodiments, referring to fig. 5, the back surface 10b of the display device 10 is provided with a second external port 10 d. When the display device 10 is supported and fixed on the supporting member 22, the first external connection port 26 is electrically connected with the second external connection port 10d in a matching manner. The first external connection port 26 and the second external connection port 10d may be plug-in type ports or contact type ports. Wherein, the plug-in type port can be a pogo pin connector. In some embodiments, to ensure the surface flatness of the display device 10 and the keyboard 20, the first external connection port 26 and the second external connection port 10d are contact type ports. Through the first external port 26 and the second external port 10d, which are electrically connected in a matching manner, the display device 10 can be used for supplying power to the first controller 25, and the communication connection between the display device 10 and the first controller 25 is established, so that a power supply and a communication device do not need to be separately arranged in the keyboard 20, and the structural complexity and the cost of the keyboard 20 are favorably 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 to transmit a power supply signal, the ground terminal is used to transmit a ground signal, and the signal terminal is used to enable signal communication between the display device 10 and the first controller 25. Correspondingly, the second external connection 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 realize the ground connection of the first controller 25; the signal terminals of the first external connection port 26 are electrically connected with the signal terminals of the second external connection 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 device 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 is mated to the first external port 26 via the second external port 10d to provide power and communication connections to 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 a 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 Integrated Circuit (DDIC). The third controller 16 is electrically connected to a touch module 112 (see 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, so as to drive the display module 113 and control the touch module 112 respectively. In other embodiments, continuing to refer to fig. 11, driver 15 and third controller 16 may be integrated into a single chip (hereinafter referred to as an integrated chip). Optionally, the integrated chip may be a Touch and Display Driver Integration (TDDI) chip. The integrated chip is electrically connected to the touch module 112 and the display module 113. The integrated chip may respectively control the touch module 112 and the driving display module 113 in a time division multiplexing manner, so that the touch screen 11 switches between the touch detection time slot and the display time slot. Thus, the display device 10 has a simple structure and low cost.
In other embodiments, please refer to fig. 12, and 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 generation circuit may also include an RC oscillation circuit 27. The RC oscillating circuit 27 is electrically connected to the first emitter 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 to an alternating signal output. The power signal may be a direct current signal. The RC oscillation circuit 27 is a circuit configuration commonly used for generating an alternating signal, and therefore is easy to implement.
In the above embodiment, a power supply structure such as a power interface, a battery, etc. may be disposed on the keyboard 20 to provide a power signal through the power supply structure. The power supply signal may be acquired to the display device 10 through the power supply terminal 26a of the first external port 26. On the basis, please continue to refer to fig. 12, a switch 29 may be further included, 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 the switch 29 to be turned on or off to implement power supply or power off control. The switch 29 may be provided in the RC oscillating circuit 27.
On the basis of the above-described 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, and the second alternating signal and the first alternating signal are signals with the same amplitude and the same 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 1 、C 2 Are all capacitors. A is a comparator. Input power signal U in Applied to a resistor R2 to output an oscillating 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, and may be other structures, which are known to those skilled in the art and will not be described herein again.
In some embodiments, please refer to fig. 14, and 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 24 a. The signal driving circuit 28 is electrically connected between the signal generating circuit and the first emitter electrode 24 a. 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 24 a. In this way, the amplitude of the first alternating signal can be increased to a certain range (such as between 3v and 10 v) to ensure the accuracy of the detection of the opening and closing cover.
The above provides various structural forms of the keyboard 20 and the display device 10 in the display system 100, and on this basis, in order to implement the open-close cover detection, the present application also provides a control method of the display device 10, where the display device 10 includes a capacitive touch screen, and specifically, the touch screen is a self-capacitive touch screen. On this basis, please refer to fig. 15, fig. 15 is a flowchart illustrating 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 to S400.
Step S100: the touch screen receives an 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 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 the step S100 includes: the touch screen receives an alternating signal at a noise detection time slot K21.
The touch detection time slot K2 may further include a finger detection time slot K22 or a pen recognition time slot K23. The finger detection time slot K22 is for detecting a finger, and the pen recognition time slot K23 is for recognizing a stylus pen.
In some embodiments, in the present embodiment, 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 slot K1 and the touch detection time slot K2. Wherein, at 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 one chip, so that the display device is simple in structure, low in cost and high in integration degree.
Step S200: 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 first preset area is as follows: 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 emitter electrode 24 a. Here, "correspond" indicates a partial region of the touch screen opposite to the first emitter electrode 24a when the display device 10 is supported and fixed on the support 22 of the above-described 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 first emitter electrode 24a on the touch screen is defined as a first projection area, and the first preset area may coincide with the first projection area, or cover the first projection area, and the edge of the first preset area is located outside the edge of the first projection area, or located in the first projection area. Meanwhile, the shape of the first preset region may be the same as the shape of the first projection region, specifically, when the shape of the first projection region is square, the shape of the first preset region is also square; when the first projection area is rectangular, the first preset area is also rectangular; when the first projection area is in an irregular shape such as a W shape, an L shape, an H shape, an M shape, etc., the first predetermined area is also in an irregular shape such as a W shape, an L shape, an H shape, an M shape, etc. In some embodiments, the first predetermined 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 5 mm. 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 the position coincides with the edge of the first projection area.
Step S300: when the first frequency is within a first preset frequency range, a first capacitance value of a first preset area is obtained.
Wherein the first preset frequency range comprises 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 emitter electrode 24a is 200Hz, and the first predetermined frequency range may be (200-10) Hz to (200 + 10) Hz, that is, 190Hz to 210 Hz.
In addition, the first capacitance value of the first predetermined area is: and the average value of the capacitance values of the capacitors in the first preset area.
Step S400: and sending a control signal according to the first capacitance value.
In this way, the display device 10 can realize the open-close cover detection by means of the touch screen, and the hardware structure of the display device 10 does not need to be changed, so the cost is low.
In the foregoing embodiment, please refer 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, and after step S100 and before step S200, the control method further includes:
step S501: and judging whether the first preset area of the touch screen receives the alternating signal. After step S501, the 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 and before step S300, the control method further includes:
step S601: whether the first frequency is within a first preset frequency range is judged. After step S601, the control method further includes step S602. Step S602: when the first frequency is outside the first preset frequency range, the control signal is not sent.
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 step S401 and step S402 described below.
Step S401, when the first capacitance value is larger than or equal to a first preset threshold value, a first control signal is sent. And step S402, when the first capacitance value is smaller than or equal to a second preset threshold value, sending a second control signal. The first preset threshold and the second preset threshold are preset fixed values, the values of the first preset threshold and the second preset threshold can be determined according to the actual situation, and the first preset threshold is larger than the second preset threshold. 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 be turned off so as to enter a sleep state. The second control signal is used for controlling the touch screen to be bright. Therefore, when the display system is in a closed state, the display device 10 can be kept in a dormant state, and when the display system is in an open state, the touch screen is awakened to realize a display function, so that 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 limited herein.
On the basis of the above embodiment, step S400 further includes: when the first capacitance value is smaller than a first preset threshold value and larger than a second preset threshold value, the touch screen maintains the last state.
Specifically, when the display system is in an open state, the first capacitance value is less 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. And then, in the process of closing the cover of the display system, along with the reduction of an included angle between the display equipment and the keyboard main body, the first capacitance value is gradually increased. 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 larger than or equal to a first preset threshold value, sending a first control signal to control the touch screen to be turned off so as to enter a dormant state.
Contrary to the above process, 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 at this time, the touch screen of the display device is in the screen-off state. And then, in the uncovering process of the display system, the first capacitance value is gradually reduced along with the increase of an 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 screen-off state). And then, when the first capacitance value is reduced to be smaller than or equal to a second preset threshold value, sending a second control signal to control the touch screen to be lightened so as to enter a lightening state.
In the above embodiment, step S400 further includes step S403 described below before step S401 and step S402.
Step S403: and judging the size relation between the first capacitance value and the first preset threshold value and the second preset threshold value.
In order to improve the accuracy of the cover opening and closing detection of the display device 10, in some embodiments, please refer to fig. 18, fig. 18 is a flowchart of a control method of the display device 10 according to still other embodiments of the present application, and after step S100 and before step S200, the method further includes: and judging whether the second preset area of the touch screen receives the alternating signal or not. Referring to fig. 18, this step may be included in the step S501. 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 before determining whether the first preset area of the touch screen receives the alternating signal, or simultaneously with determining whether the first preset area of the touch screen receives the alternating signal, which is not specifically 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 keypad 20, a partial area of the touch screen corresponding to the second transmitting electrode 24b is formed. Here, "correspond" indicates 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-described 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 also cover the second projection area, and the edge of the second preset area is located outside the edge of the second projection area, and may also be located in the second projection area. Meanwhile, the shape of the second preset region may be the same as that of the second projection region, specifically, when the shape of the second projection region is square, the shape of the second preset region 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 second projection area is irregular in shape such as W-shape, L-shape, H-shape, M-shape, etc., the second predetermined area is also irregular in shape 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 located 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 5 mm. It should be noted that, when the minimum distance between the edge of the second predetermined region and the edge of the second projection region is equal to 0mm, the edge of the second predetermined region at the position coincides with the edge of the second projection region.
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 to obtain a first frequency.
Therefore, when the first preset area and the second preset area simultaneously detect the alternating signals, the frequency is acquired, and the following operations are carried out, so that the accuracy of cover opening and closing detection can be improved, and unnecessary control steps are avoided.
On the basis of the above, in order to improve the accuracy of the open-close detection, in some embodiments, please continue to refer to fig. 18, after step S700 and before step S300, the method further includes: when the second preset area of the touch screen receives the alternating signal, 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 the step S200. 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, or may be obtained simultaneously with the frequency of the alternating signal received by the first preset area, which is not specifically limited herein.
After the step S200 and before the step S300, the control method further includes: and judging whether the second frequency is within a second preset frequency range. Referring to fig. 18, this step may be included in the step S601. Specifically, the determining whether the second frequency is within the second preset frequency range may be performed after the determining whether the first frequency is within the first preset frequency range, or before the determining whether the first frequency is within the first preset frequency range, or may be performed simultaneously with the determining whether the first frequency is within 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 second emitting electrode 24 b. For example, the frequency of the second alternating signal emitted by the second emitting electrode 24b is 200Hz, and the second predetermined frequency range may be (200-10) Hz to (200 + 10) Hz, that is, 190Hz to 210 Hz. The second predetermined frequency range may be the same as the first predetermined frequency range, or may be different from the first predetermined frequency range, which is not limited herein.
On the basis of the above, step S300 includes: when the first frequency is within a first preset frequency range and the second frequency is within a second preset frequency range, a first capacitance value of the first preset area is obtained.
Therefore, 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, and the following operations are carried out, so that the accuracy of cover opening and closing detection can be improved, and unnecessary control steps are avoided.
On the basis, optionally, referring to fig. 18 again, after step S800 and before step S400, the control method further includes: and when the second frequency is within 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 step S300. Specifically, the capacitance value of the second preset region may be obtained after the capacitance value of the first preset region is obtained, or before the capacitance value of the first preset region is obtained, and may also be obtained simultaneously with the capacitance value of the first preset region, which is not specifically limited herein.
Wherein, the second capacitance value of the second preset area means: and the average value of the capacitance values of all the capacitors in the second preset area.
On the basis of the above, step S400 includes: and sending a control signal according to the first capacitance value and the second capacitance value.
In this way, the control signal is transmitted according to the first capacitance value and the second capacitance value, and the control accuracy can be improved.
On the basis of the above, in order to avoid the detection accuracy from being reduced due to the generation of the tilt angle at the keyboard main body 21 where the first transmitting electrode 24a or the second transmitting electrode 24b is located on the keyboard 20, in some embodiments, please refer to fig. 19, and 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, sending 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, sending the second control signal. The third preset threshold and the fourth preset threshold are preset fixed values, the values of the third preset threshold and the fourth preset threshold can be determined according to the actual situation, and the third preset threshold is larger than the fourth preset threshold.
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 portion, where the first transmitting electrode 24a or the second transmitting electrode 24b is located, of the keyboard main body 21 is warped can be avoided.
Based on the above embodiment, please continue to refer 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 open state, the first capacitance value is less than or equal to a second preset threshold value, and/or the second capacitance value is less 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. And then, in the process of closing the cover of the display system, along with the reduction of an included angle between the display equipment and the keyboard main body, the first capacitance value is gradually increased. When the first capacitance value is greater than the second preset threshold value and smaller than the first preset threshold value, and the second capacitance value is greater than the fourth preset threshold value and smaller than the third preset threshold value, the touch screen of the display device is maintained in the previous state (i.e., the bright screen state). And then, when the first capacitance value is increased to be larger than or equal to a first preset threshold value and/or the second capacitance value is increased to be larger than or equal to a third preset threshold value, sending a first control signal to control the touch screen to be turned off so as to enter a dormant state.
Contrary to the above process, 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, at this time, the touch screen of the display device is in the screen-off state. And then, in the uncovering process of the display system, the first capacitance value is gradually reduced along with the increase of an 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 previous state (i.e., the screen-off state). And then, when the first capacitance value is reduced to be less than or equal to a second preset threshold value and/or the second capacitance value is reduced to be less than or equal to a fourth preset threshold value, sending a second control signal to control the touch screen to be lightened so as to enter a lightening state.
In some embodiments, step S403 further comprises: and judging the size relation between the second capacitance value and a third preset threshold value and a fourth preset threshold value. Specifically, the magnitude relationship between the second capacitance value and the third preset threshold and the fourth preset threshold may be determined after the magnitude relationship between the first capacitance value and the first preset threshold and the second preset threshold is determined, or may be determined simultaneously with the magnitude relationship between the first capacitance value and the first preset threshold and the second preset threshold before the magnitude relationship between the first capacitance value and the first preset threshold and the second preset threshold is determined, which is not specifically limited herein.
Some embodiments of the present application also provide a computer storage medium, which includes but is not limited to various media that can store program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk. 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 according to any of the embodiments described above.
Some embodiments of the present application further provide a computer program product, which when run on a computer, causes the computer to execute the control method of any of the above embodiments.
The computer storage medium or the computer program product provided in the embodiments of the present application are both used to execute the control method described in any embodiment, and therefore, the beneficial effects that can be achieved by the computer storage medium or the computer program product may refer to the beneficial effects in the corresponding control method provided above, which are not described herein again.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.

Claims (27)

1. A keyboard is characterized by comprising a keyboard main body, a support piece, a first transmitting electrode and a signal generating circuit;
the supporting piece is rotatably connected with the keyboard main body;
the first emitting electrode is arranged in the keyboard main body, the signal generating circuit is electrically connected with the first emitting electrode, the signal generating circuit is used for generating a first alternating signal, and the first emitting electrode is used for emitting the first alternating signal.
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, the first controller being configured to generate 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 oscillation circuit;
the RC oscillating circuit is electrically connected with the first transmitting electrode, and the RC oscillating circuit 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 emitting 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 emitting electrode.
7. The keyboard of any one of claims 1-5, wherein the keyboard body comprises a keyboard surface, and an orthographic area of the first transmitting electrode on the keyboard surface is greater than or equal to 25mm 2 And is less than or equal to 1600mm 2 。
8. A keyboard according to any of claims 1-5, wherein the amplitude of the first alternating signal is greater than or equal to 3V and less than or equal to 10V.
9. The keyboard of any one of claims 1-5, wherein the frequency of the first alternating signal is greater than or equal to 100KHz and less than or equal to 400 KHz.
10. A keyboard according to any of claims 1 to 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 and the keyboard main body are rotatably connected through the rotary connecting structure; the first emitting electrode is arranged at one end part of the keyboard main body far away from the rotary connecting structure.
12. The keyboard of claim 11, further comprising a second transmitting 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, close to the rotating connecting structure, of the keyboard main body.
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 the supporting member 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 includes a capacitive touch screen;
the control method comprises the following steps:
the touch screen receives an alternating signal;
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 within a first preset frequency range, acquiring a first capacitance value of the first preset area;
and sending a control signal according to the first capacitance value.
16. The method of claim 15, wherein sending a control signal based on the first capacitance value comprises:
when the first capacitance value is larger than or equal to a first preset threshold value, sending a first control signal;
when the first capacitance value is smaller than or equal to a second preset threshold value, sending a second control signal;
wherein the first preset threshold is greater than the second preset threshold.
17. The control method according to claim 16, wherein the first control signal is used for controlling the touch screen to be turned off;
the second control signal is used for controlling the touch screen to be bright.
18. The method of claim 17, wherein sending a control signal based on the first capacitance value further comprises:
when the first capacitance value is smaller than the first preset threshold value and larger than a second preset threshold value, the touch screen maintains a last state.
19. The control method according to claim 15, wherein after the touch screen receives the alternating signal and before the frequency of the alternating signal received by the first preset area is acquired, 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:
when the first preset area and the second preset area of the touch screen both receive the alternating signals, the frequency of the alternating signals received by the first preset area is obtained, so that a first frequency is obtained.
20. The control method according to claim 19, wherein 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 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 region, including:
and when the first frequency is within a first preset frequency range and the second frequency is within a second preset frequency range, acquiring a first capacitance value of the first preset area.
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 a second frequency, the control method further comprises:
when the second frequency is within a second preset frequency range, acquiring a second capacitance value of the second preset area;
transmitting a control signal according to the first capacitance value, comprising:
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 and second capacitance values 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, sending a first control signal;
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 is greater than the second preset threshold, and the third preset threshold is greater than the fourth preset threshold.
23. The method of claim 15, wherein the operating time slot of the touch screen comprises a touch detection time slot, wherein the touch detection time slot comprises a noise detection time slot, and wherein the receiving of the alternating signal by the touch screen comprises:
the touch screen receives an alternating signal during a noise detection time slot.
24. The control method according to 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 working time slots of the touch screen include alternate working time slots, and the alternate working time slots are sequentially and alternately set by a display time slot and the touch detection time slot.
26. A computer storage medium comprising computer instructions that, when run on a display device, cause the display device to perform the control method of any one of claims 15-25.
27. A computer program product, characterized in that it causes a computer to carry out the control method according to any one of claims 15-25, when said computer program product is run on the computer.
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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

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