CN114201065B - Touch module, driving method thereof and LED display screen - Google Patents
Touch module, driving method thereof and LED display screen Download PDFInfo
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- CN114201065B CN114201065B CN202010982422.9A CN202010982422A CN114201065B CN 114201065 B CN114201065 B CN 114201065B CN 202010982422 A CN202010982422 A CN 202010982422A CN 114201065 B CN114201065 B CN 114201065B
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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
- G06F3/03—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
- G06F3/0412—Digitisers structurally integrated in a display
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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
- G06F3/03—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
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
- G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Position Input By Displaying (AREA)
- Control Of El Displays (AREA)
Abstract
The invention provides a touch module, a driving method thereof and an LED display screen, belongs to the technical field of display, and can at least partially solve the problem that the existing touch module occupies more space due to more wiring and other factors when being applied to a display panel with higher touch precision or a display panel with larger size. The invention relates to a touch module, which comprises: a plurality of first electrodes and a plurality of second electrodes; the integrated circuit units corresponding to the first electrodes are arranged at intervals along the first direction, the integrated circuit units corresponding to the second electrodes are arranged at intervals along the second direction, and a first input end of each integrated circuit unit is connected with the corresponding first electrode or second electrode through signals; the output end of the control unit is connected with the control ends of all the integrated circuit units through a control line, and the input end of the control unit is in signal connection with the output ends of all the integrated circuit units.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a touch module, a driving method thereof and an LED display screen.
Background
With the continuous development of display panel technology, touch technology of display panels is increasingly widely used. Specifically, the touch module of the display panel transmits touch signals of each touch area through an integrated circuit unit (Channel).
In the prior art, a display panel with high touch accuracy or a display panel with a large size has a large number of integrated circuit units (channels), which causes an increase in the number of wires of the display panel, so that a narrow frame structure of the display panel is not easy to form.
Disclosure of Invention
The invention at least partially solves the problem that the existing touch module is applied to a display panel with higher touch precision or a display panel with larger size, and occupies more space due to more wiring and other factors, and provides the touch module which can be applied to the display panel with higher touch precision or the display panel with larger size and occupies less space.
The technical scheme adopted for solving the technical problem of the invention is a touch module, comprising: the touch control device comprises a touch control area, a plurality of first electrodes, a plurality of second electrodes, a plurality of first electrodes and a plurality of second electrodes, wherein each first electrode is in a strip shape, and all the first electrodes are parallel to each other along a first direction and are arranged at intervals; the second electrodes are positioned in the touch area, each second electrode is in a strip shape, all the second electrodes are parallel to each other along a second direction and are arranged at intervals, and the first direction and the second direction are perpendicular to each other; the touch control device comprises a touch control area, a plurality of integrated circuit units, a first electrode, a second electrode, a first electrode and a second electrode, wherein the plurality of integrated circuit units are positioned at the periphery of the touch control area, each first electrode corresponds to one integrated circuit unit, the integrated circuit units corresponding to the first electrode are arranged at intervals along the first direction, each second electrode corresponds to one integrated circuit unit, the integrated circuit units corresponding to the second electrode are arranged at intervals along the second direction, and a first input end of each integrated circuit unit is connected with the corresponding first electrode or second electrode through signals; the output end of the control unit is connected with the control ends of all the integrated circuit units through a control line, and the input end of the control unit is in signal connection with the output ends of all the integrated circuit units.
It is further preferred that the input of the control unit is connected to the outputs of all the integrated circuit units by an output line; the touch module further comprises: and the output control units are in one-to-one correspondence with the integrated circuit units, and each output control unit is positioned between the control end of the integrated circuit unit and the control line and is used for controlling the time sequence of the output end of the integrated circuit unit.
Further preferably, the output control unit is a resistor voltage division unit; each integrated circuit unit comprises a comparator, and the control voltage passing through the resistor voltage dividing unit is used for controlling the time sequence of the output end of the integrated circuit unit through the comparator.
Further preferably, the touch module further includes: and the boosting unit is positioned between the output end of the control unit and the control line and is used for boosting the voltage of the output end of the control unit.
It is further preferred that the plurality of integrated circuit units is n of said integrated circuit units, and that the output terminal of each of said integrated circuit units is connected to the second input terminal of the previous one of said integrated circuit units except the first one of said integrated circuit units, the output terminal of the first one of said integrated circuit units being connected to the input terminal of said control unit via an output line; each of the integrated circuit units includes: and the memory is used for storing signals output by the integrated circuit unit.
It is further preferred that the synchronous timing terminal of the control unit is connected to the timing terminals of all the integrated circuit units by a timing line.
The technical scheme adopted for solving the technical problem of the invention is an LED display screen, comprising: a plurality of LED display modules; the LED display modules correspond to the touch modules one by one; and the total control unit is in signal connection with the control units of all the touch modules.
Further preferably, the LED display screen is a micro LED tiled display screen.
The technical scheme adopted for solving the technical problem of the invention is a driving method of a touch module, based on the touch module, the driving method comprises the following steps: the first electrode and/or the second electrode transmit the touch signal to the corresponding integrated circuit unit through the first input end of the corresponding integrated circuit unit; the control unit transmits a control timing signal to the integrated circuit unit through a control line; and the integrated circuit unit sequentially transmits the touch control signals of all the integrated circuit units to the control unit according to the control time sequence signals.
It is further preferred that the control unit transmitting the control timing signal to the integrated circuit unit through the control line includes: the control unit transmits control voltage to each resistor voltage division unit through a control line;
the resistor voltage dividing unit outputs a control time sequence signal according to the control voltage, and inputs the control time sequence signal to a comparator of the corresponding integrated circuit unit; the integrated circuit unit sequentially transmitting the touch signals of all the integrated circuit units to the control unit according to the control time sequence signal comprises: and the comparator controls whether the output end of the integrated circuit unit outputs a touch signal to the control unit according to the control time sequence signal.
Further preferably, the transmitting, by the integrated circuit unit, the touch signals of all the integrated circuit units to the control unit sequentially according to the control timing signal includes: and transmitting the touch control signals to the memory of the previous integrated circuit unit according to the output end of each integrated circuit unit except the first integrated circuit unit according to the control time sequence signals until the touch control signals are transmitted to the first integrated circuit unit, and transmitting the touch control signals in the memory of the first integrated circuit unit to the control unit through an output line.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
fig. 1 is a schematic top view of a touch module according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a touch module according to an embodiment of the invention;
FIG. 3 is a schematic diagram illustrating an integrated circuit unit of the touch module of FIG. 2;
FIG. 4 is a schematic diagram of a comparator of the integrated circuit unit of FIG. 3;
FIG. 5 is a timing diagram of the touch module of FIG. 2;
fig. 6 is a schematic structural diagram of a touch module according to an embodiment of the invention;
FIG. 7 is a schematic diagram of an integrated circuit unit of the touch module of FIG. 6;
FIG. 8 is a timing diagram of the touch module of FIG. 6;
FIG. 9 is a schematic diagram illustrating connection of a general control unit of an LED display screen according to an embodiment of the present invention;
wherein, the reference numerals are as follows: 1. a first electrode; 2. a second electrode; IC. An integrated circuit unit; 3. a comparator; FIFO, memory; an MCU and a control unit; CS, control line; MISO, output line; LS, a boosting unit; CLK, timing line; MOSI, master output slave input line; 4. a resistor voltage dividing unit; 5. a touch signal processing module; a Touch-n, a first input; DI. A second input terminal; an output of the DO and integrated circuit unit; 6. and a total control unit.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and detailed description for the purpose of better understanding of the technical solution of the present invention to those skilled in the art.
The invention will be described in more detail below with reference to the accompanying drawings. Like elements are denoted by like reference numerals throughout the various figures. For clarity, the various features of the drawings are not drawn to scale. Furthermore, some well-known portions may not be shown in the drawings.
Numerous specific details of the invention, such as construction, materials, dimensions, processing techniques and technologies, may be set forth in the following description in order to provide a thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
Example 1:
as shown in fig. 1 to 8, the present embodiment provides a touch module (touch IC) including a plurality of first electrodes 1 (TX), a plurality of second electrodes 2 (RX), a plurality of integrated circuit units ICs and a control unit MCU.
The first electrodes 1 (TX) are located in the touch area, each of the first electrodes 1 is in a strip shape, and all the first electrodes 1 are parallel to each other along a first direction (e.g. x direction in fig. 1) and are arranged at intervals.
The second electrodes 2 (RX) are located in the touch area, each of the second electrodes 2 is in a strip shape, all the second electrodes 2 are parallel to each other along a second direction (e.g. y direction in fig. 1) and are arranged at intervals, and the first direction and the second direction are perpendicular to each other.
The Touch control device comprises a plurality of integrated circuit units (ICs), a plurality of first electrodes (1), a plurality of second electrodes (2) and a plurality of Touch control areas, wherein the ICs are positioned at the periphery of the Touch control area, each first electrode (1) corresponds to one IC, the ICs corresponding to the first electrode (1) are arranged at intervals along a first direction, each second electrode (2) corresponds to one IC, the ICs corresponding to the second electrode (2) are arranged at intervals along a second direction, and a first input end Touch-n of each IC is connected with the corresponding first electrode (1) or second electrode (2) through signals.
And the output end of the control unit MCU is connected with the control ends of all the integrated circuit units IC through a control line CS, and the input end of the control unit MCU is in signal connection with the output ends of all the integrated circuit units IC.
As shown in fig. 1, the touch area may be in a regular quadrangle, and the first electrode 1 and the second electrode 2 have a plurality of overlapping areas in the touch area, i.e. corresponding to the positions of the first electrode 1 and the second electrode 2 for generating the touch signal.
The integrated circuit units IC corresponding to the first electrode 1 are arranged in a row, are arranged at one edge of the touch area and correspond to one end of the first electrode 1; the integrated circuit units IC corresponding to the second electrodes 2 are arranged in a row, are disposed at the other edge of the touch area, and correspond to one end of the second electrodes 2. Each integrated circuit unit IC receives a touch signal of its corresponding first electrode 1 or second electrode 2.
For example, as shown in fig. 1, the number of the first electrodes 1 and the second electrodes 2 is 20, and the number of the integrated circuit units IC is 40.
The control ends of all the integrated circuit units IC are connected with the control unit MCU through a control line CS, so that the control timing signals (CS-H) from the control unit MCU are received by the control line CS of each integrated circuit unit IC to control the integrated circuit units IC to send touch control signals to the control unit MCU, and the control unit MCU can recognize the touch control signals.
In the touch module of this embodiment, through the arrangement mode of the first electrode 1, the second electrode 2 and the integrated circuit unit IC, not only can the touch signals in the first electrode 1 and the second electrode 2 be guaranteed to be sequentially transmitted to the control unit MCU, but also the arrangement mode of the integrated circuit unit IC and the connection mode of the integrated circuit unit IC and the control unit MCU can reduce the wiring of the touch module as far as possible, and the touch module is particularly suitable for a display panel with higher touch precision or a display panel with larger size, and further can form a display panel with a narrower frame on the premise of guaranteeing touch performance.
In addition, less wires in the touch module can reduce the load (loading) of the touch module, so that the touch accuracy of the touch module can be improved.
Preferably, the first specific structure of the touch module is: as shown in fig. 2 to 5, the input terminal of the control unit MCU is connected to the output terminals of all the integrated circuit units ICs through one output line MISO; the touch module further comprises: and a plurality of output control units, which are in one-to-one correspondence with the integrated circuit units IC, wherein each output control unit is positioned between the control end of the integrated circuit unit IC and the control line CS and is used for controlling the time sequence of the output end of the integrated circuit unit IC.
As shown in fig. 2 (in which ICn represents an nth integrated circuit unit), the output terminals of all integrated circuit units ICs are connected to the same output line MISO, and the output line MISO is connected to the input terminal of the control unit MCU, that is, the touch signal of the integrated circuit unit IC can be transmitted to the input terminal of the control unit MCU through the same output line MISO. It should be noted that the control unit MCU may also be connected to a master-output-slave input line MOSI. The interfaces such as the input end and the output end of the integrated circuit unit IC may be SPI protocol interface integrated circuit unit IC further comprises a touch signal processing module 5, as shown in fig. 3.
Meanwhile, the output control unit corresponding to each integrated circuit unit IC can control when the touch signal of the integrated circuit unit IC is output to the control unit MCU. Thus, even if a plurality of integrated circuit unit ICs are connected to the same output line MISO, the control unit MCU can determine from which integrated circuit unit IC the touch signal is coming according to the input timing of the touch signal, thereby determining the position where the touch signal is generated.
Further, the output control unit is a resistor voltage dividing unit 4; each integrated circuit unit IC includes a comparator 3 therein, and the control voltage passing through the resistor divider unit 4 is used to control the timing of the output terminals of the integrated circuit units IC by the comparator 3.
The resistor voltage dividing unit 4 can be realized by wiring a metal wire or packaging a small chip resistor, and for the LED display screen, a chip mounting process is provided, so that the process can be realized.
As shown in fig. 4, the comparator 3 may be composed of two different transistors (MOS transistors) and an exclusive-or circuit, the turn-on voltage of the first transistor M1 is a first voltage (e.g. 0.7V), and the turn-on voltage of the second transistor M2 is a second voltage (0.9V), so when the control timing signal is lower than 0.7V, both transistors are not turned on, and the comparator 3 outputs 0; when the control timing signal is 0.9V between 0.7V, the comparator 3 outputs 1; the comparator 3 outputs 0 when the control timing signal is greater than 0.9V, so the comparator 3 can output a high level only when the control timing signal is between 0.7V and 0.9V, and the integrated circuit unit IC outputs a touch signal.
The driving method specifically comprises the following steps: firstly, the control unit MCU transmits control voltage to each resistor voltage division unit 4 through a control line CS; next, the resistor voltage dividing unit 4 outputs a control timing signal according to the control voltage, and inputs the control timing signal to the comparator 3 of the corresponding integrated circuit unit IC; then, the comparator 3 controls whether the output terminal of the integrated circuit unit IC outputs a touch signal to the control unit MCU according to the control timing signal.
Since the control voltages outputted from the control lines CS are different in different periods, the resistor voltage dividing units 4 corresponding to different integrated circuit units IC are different in order to ensure that the effective control timing signals inputted to the integrated circuit units IC are identical.
Further, the touch module of the embodiment further includes: the boosting unit LS is positioned between the output end of the control unit MCU and the control line CS and used for boosting the voltage of the output end of the control unit MCU.
Preferably, as shown in fig. 6 to 8, the second specific structure of the touch module is: the integrated circuit units IC are n integrated circuit units IC, except for the first integrated circuit unit IC1, the output terminal DO of each integrated circuit unit IC is connected with the second input terminal DI of the previous integrated circuit unit IC, and the output terminal DO of the first integrated circuit unit IC is connected with the input terminal of the control unit MCU through an output line MISO; each integrated circuit unit IC comprises: a memory FIFO (FIFO) for storing signals output by the latter integrated circuit unit IC.
As shown in fig. 6, the output terminal DO of each integrated circuit unit IC is connected to the second input terminal DI of the previous integrated circuit unit IC, so that the touch signal of the nth integrated circuit unit IC is sequentially transmitted to the control unit MCU through the nth-1 integrated circuit unit IC and the nth-2 integrated circuit unit IC … …, the 1 st integrated circuit unit IC; the touch signal of the n-1 th integrated circuit unit IC is sequentially transmitted to the control unit MCU through the n-2 nd integrated circuit unit IC, the n-3 rd integrated circuit unit IC … … and the 1 st integrated circuit unit IC, and the like.
The driving method specifically comprises the following steps: in the first period b1, except for the first integrated circuit unit IC, the output terminal DO of each integrated circuit unit IC transmits the touch control signal to the memory FIFO of the previous integrated circuit unit IC according to the control time sequence signal, and the first integrated circuit unit IC transmits the touch control signal in the memory FIFO to the control unit MCU through the output line MISO; in the second period b2, except the first integrated circuit unit IC and the nth integrated circuit unit IC, the output terminal DO of each integrated circuit unit IC transmits a touch signal to the memory FIFO of the previous integrated circuit unit IC according to the control timing signal, and the first integrated circuit unit IC transmits the touch signal of the second integrated circuit unit IC in the memory FIFO thereof to the control unit MCU through the output line MISO; in the third period b3, except for the first integrated circuit unit IC, the nth integrated circuit unit IC and the n-1 th integrated circuit unit IC, the output terminal DO of each integrated circuit unit IC transmits a touch signal to the memory FIFO of the previous integrated circuit unit IC according to the control timing signal, and the first integrated circuit unit IC transmits the touch signal of the third integrated circuit unit IC in the memory FIFO thereof to the control unit MCU through the output line MISO; … …; in the nth period, the first integrated circuit unit IC transmits the touch signal of the nth integrated circuit unit IC in its memory FIFO to the control unit MCU through the output line MISO.
In the second touch module, only the output terminal DO of the first integrated circuit unit IC is connected with the control unit MCU, so that the arrangement of wiring of the touch module is further reduced, and the occupied space of the touch module is further reduced.
In addition, the synchronous timing terminal of the control unit MCU is connected with the timing terminals of all the integrated circuit units IC through a timing line CLK.
Wherein the control unit MCU transmits the synchronous timing signal to all the integrated circuit units ICs through the timing line CLK.
Example 2:
as shown in fig. 1 to 9, the present embodiment provides an LED display screen, including:
a plurality of LED display modules;
the touch control modules in the embodiment 1 are in one-to-one correspondence with the LED display modules;
the total control unit 6 is connected with the control unit MCU of all the touch modules in a signal manner.
The LED display screen of this embodiment is formed by splicing a plurality of LED display modules. Each LED display module corresponds to one touch module, and the control unit MCU of each touch module finally transmits the received touch signal to the control unit MCU of the overall control unit 6, as shown in fig. 9.
Specifically, the LED display screen is a micro-LED spliced display screen (mini-LED).
Example 3:
as shown in fig. 1 to 9, the present embodiment provides a driving method of a touch module, and the driving method of the touch module in embodiment 1 includes:
s11, the first electrode 1 and/or the second electrode 2 transmit a Touch signal to the corresponding integrated circuit unit IC through the first input end Touch-n of the corresponding integrated circuit unit IC;
s12, the control unit MCU transmits a control time sequence signal to the integrated circuit unit IC through a control line CS;
s13, the integrated circuit unit ICs sequentially transmit the touch control signals of all the integrated circuit unit ICs to the control unit MCU according to the control time sequence signals.
In the driving method of the touch module of the embodiment, the arrangement mode of the integrated circuit unit IC and the connection mode of the integrated circuit unit IC and the control unit MCU can reduce the wiring of the touch module as much as possible, and the driving method is particularly suitable for display panels with higher touch precision or display panels with larger size, and further can form display panels with narrower frames on the premise of ensuring touch performance.
As shown in fig. 2 to 5 (where ICn denotes an nth integrated circuit unit), for the first case in embodiment 1, the control unit MCU transmitting the control timing signal to the integrated circuit unit IC through the control line CS includes:
s121, the control unit MCU transmits the control voltage to each resistor divider unit 4 through the control line CS.
S122, the resistor divider unit 4 outputs a control timing signal according to the control voltage, and inputs the control timing signal to the comparator 3 of the corresponding integrated circuit unit IC.
S123, the integrated circuit unit ICs sequentially transmit the touch control signals of all the integrated circuit unit ICs to the control unit MCU according to the control time sequence signals.
S124, the comparator 3 controls whether the output end of the integrated circuit unit IC outputs a touch signal to the control unit MCU according to the control time sequence signal.
For example, in the first period a1, the control voltage output by the control unit MCU to each of the resistor voltage dividing units 4 is 0.8V, the control timing signal passing through the first resistor voltage dividing unit 4 is 0.8V, and the 0.8V is written into the comparator 3 of the first integrated circuit unit IC (since the comparator 3 can output a high level only when the control timing signal is between 0.7V and 0.9V, the comparator 3 controls the integrated circuit unit IC to output a touch signal), so that the first integrated circuit unit IC outputs a touch signal to the control unit MCU; meanwhile, the control timing signal passing through the second resistor voltage dividing unit 4 is 0.7V, and the 0.7V is written into the comparator 3 of the second integrated circuit unit IC (since the comparator 3 only controls the integrated circuit unit IC to output the touch signal when the control timing signal is between 0.7V and 0.9V), so that the second integrated circuit unit IC does not output the touch signal to the control unit MCU; by analogy, none of the third to nth integrated circuit units IC outputs a touch signal to the control unit MCU.
In the second period a2, the control voltage output by the control unit MCU to each of the resistor-divider units 4 is 1.0V, the control timing signal passing through the second resistor-divider unit 4 is 0.8V, and the 0.8V is written into the comparator 3 of the second integrated circuit unit IC (since the comparator 3 can output a high level only when the control timing signal is between 0.7V and 0.9V, the comparator 3 controls the integrated circuit unit IC to output a touch signal), so that the second integrated circuit unit IC outputs a touch signal to the control unit MCU; meanwhile, the control timing signal of the first resistor voltage dividing unit 4 is 0.9V, and the 0.9V is written into the comparator 3 of the second integrated circuit unit IC (since the comparator 3 can output a high level only when the control timing signal is between 0.7V and 0.9V, the comparator 3 controls the integrated circuit unit IC to output a touch signal), so that the first integrated circuit unit IC outputs the touch signal to the control unit MCU; by analogy, none of the third to nth integrated circuit units IC outputs a touch signal to the control unit MCU. The processes from the third period to the nth period are similar to the two periods, namely, only one integrated circuit unit IC outputs a touch signal to the control unit MCU in each period.
As shown in fig. 6 to 8 (in which ICn represents an nth integrated circuit unit), for the second case in embodiment 1, the integrated circuit unit IC sequentially transmits the touch signals of all the integrated circuit units IC to the control unit MCU according to the control timing signal includes:
the output DO of each integrated circuit unit IC transmits the touch signal to the memory FIFO of the previous integrated circuit unit IC according to the control timing signal except the first integrated circuit unit IC until the touch signal is transmitted to the first integrated circuit unit IC, and the first integrated circuit unit IC transmits the touch signal in the memory FIFO to the control unit MCU through the output line MISO.
For example, in the first period b1, except for the first integrated circuit unit IC, the output DO of each integrated circuit unit IC transmits the touch signal to the memory FIFO of the previous integrated circuit unit IC according to the control timing signal, and the first integrated circuit unit IC transmits the touch signal in its memory FIFO to the control unit MCU through the output line MISO.
In the second period b2, the output DO of each integrated circuit unit IC will transmit a touch signal to the memory FIFO of the previous integrated circuit unit IC according to the control timing signal, except for the first integrated circuit unit IC and the nth integrated circuit unit IC, which will transmit the touch signal of the second integrated circuit unit IC in its memory FIFO to the control unit MCU through the output line MISO.
In the third period b3, in addition to the first integrated circuit unit IC, the nth integrated circuit unit IC, and the n-1 th integrated circuit unit IC, the output DO of each integrated circuit unit IC transmits a touch signal to the memory FIFO of the preceding integrated circuit unit IC according to the control timing signal, and the first integrated circuit unit IC transmits the touch signal of the third integrated circuit unit IC in its memory FIFO to the control unit MCU through the output line MISO.
……
In the nth period bn, the first integrated circuit unit IC transmits the touch signal of the nth integrated circuit unit IC in its memory FIFO to the control unit MCU through the output line MISO.
It should be noted that in this document relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
Embodiments in accordance with the present invention, as described above, are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (10)
1. The utility model provides a touch module which characterized in that includes:
the touch control device comprises a touch control area, a plurality of first electrodes, a plurality of second electrodes, a plurality of first electrodes and a plurality of second electrodes, wherein each first electrode is in a strip shape, and all the first electrodes are parallel to each other along a first direction and are arranged at intervals;
the second electrodes are positioned in the touch area, each second electrode is in a strip shape, all the second electrodes are parallel to each other along a second direction and are arranged at intervals, and the first direction and the second direction are perpendicular to each other;
the touch control device comprises a touch control area, a plurality of integrated circuit units, a first electrode, a second electrode, a first electrode and a second electrode, wherein the plurality of integrated circuit units are positioned at the periphery of the touch control area, each first electrode corresponds to one integrated circuit unit, the integrated circuit units corresponding to the first electrode are arranged at intervals along the first direction, each second electrode corresponds to one integrated circuit unit, the integrated circuit units corresponding to the second electrode are arranged at intervals along the second direction, and a first input end of each integrated circuit unit is connected with the corresponding first electrode or second electrode through signals;
the output end of the control unit is connected with the control ends of all the integrated circuit units through a control line, and the input end of the control unit is in signal connection with the output ends of all the integrated circuit units; the input end of the control unit is connected with the output ends of all the integrated circuit units through an output line;
the touch module further comprises:
and the output control units are in one-to-one correspondence with the integrated circuit units, and each output control unit is positioned between the control end of the integrated circuit unit and the control line and is used for controlling the time sequence of the output end of the integrated circuit unit.
2. The touch module of claim 1, wherein the output control unit is a resistor divider unit;
each integrated circuit unit comprises a comparator, and the control voltage passing through the resistor voltage dividing unit is used for controlling the time sequence of the output end of the integrated circuit unit through the comparator.
3. The touch module of claim 1, further comprising:
and the boosting unit is positioned between the output end of the control unit and the control line and is used for boosting the voltage of the output end of the control unit.
4. The touch module according to claim 1, wherein the plurality of integrated circuit units is n integrated circuit units, and an output terminal of each integrated circuit unit is connected to a second input terminal of a previous integrated circuit unit except for a first one of the integrated circuit units, and an output terminal of the first one of the integrated circuit units is connected to an input terminal of the control unit through an output line;
each of the integrated circuit units includes: and the memory is used for storing signals output by the integrated circuit unit.
5. The touch module of claim 1, wherein the synchronous timing terminal of the control unit is connected to the timing terminals of all the integrated circuit units through a timing line.
6. An LED display screen, comprising:
a plurality of LED display modules;
the touch module of any one of claims 1 to 5, wherein the LED display modules and the touch module are in one-to-one correspondence;
and the total control unit is in signal connection with the control units of all the touch modules.
7. The LED display screen of claim 6, wherein the LED display screen is a micro LED tiled display screen.
8. A driving method of a touch module, wherein the driving method is based on the touch module of any one of claims 1 to 5, and comprises:
the first electrode and/or the second electrode transmit the touch signal to the corresponding integrated circuit unit through the first input end of the corresponding integrated circuit unit;
the control unit transmits a control timing signal to the integrated circuit unit through a control line;
and the integrated circuit unit sequentially transmits the touch control signals of all the integrated circuit units to the control unit according to the control time sequence signals.
9. The driving method of the touch module according to claim 8, wherein the control unit transmitting the control timing signal to the integrated circuit unit through the control line based on the touch module of claim 2 comprises:
the control unit transmits control voltage to each resistor voltage division unit through a control line;
the resistor voltage dividing unit outputs a control time sequence signal according to the control voltage, and inputs the control time sequence signal to a comparator of the corresponding integrated circuit unit;
the integrated circuit unit sequentially transmitting the touch signals of all the integrated circuit units to the control unit according to the control time sequence signal comprises:
and the comparator controls whether the output end of the integrated circuit unit outputs a touch signal to the control unit according to the control time sequence signal.
10. The method according to claim 8, wherein based on the touch module of claim 4, the transmitting, by the integrated circuit unit, the touch signals of all the integrated circuit units to the control unit in sequence according to the control timing signal includes:
and transmitting the touch control signals to the memory of the previous integrated circuit unit according to the output end of each integrated circuit unit except the first integrated circuit unit according to the control time sequence signals until the touch control signals are transmitted to the first integrated circuit unit, and transmitting the touch control signals in the memory of the first integrated circuit unit to the control unit through an output line.
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| CN209044556U (en) * | 2018-12-12 | 2019-06-28 | 福建华佳彩有限公司 | A kind of embedded touch control panel |
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| WO2013071513A1 (en) * | 2011-11-15 | 2013-05-23 | 深圳市华星光电技术有限公司 | Lcd data drive ic output compensation circuit, compensation method, and liquid crystal display |
| CN205247350U (en) * | 2015-12-16 | 2016-05-18 | 上海中航光电子有限公司 | Integrated touch -control display panel and integrated touch -sensitive display device |
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