CN111007955A - Display device - Google Patents
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- CN111007955A CN111007955A CN201911040927.7A CN201911040927A CN111007955A CN 111007955 A CN111007955 A CN 111007955A CN 201911040927 A CN201911040927 A CN 201911040927A CN 111007955 A CN111007955 A CN 111007955A
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- 238000010586 diagram Methods 0.000 description 12
- 239000008186 active pharmaceutical agent Substances 0.000 description 7
- 101150110971 CIN7 gene Proteins 0.000 description 6
- 101150110298 INV1 gene Proteins 0.000 description 6
- 101100397044 Xenopus laevis invs-a gene Proteins 0.000 description 6
- 101150087322 DCPS gene Proteins 0.000 description 5
- 101100508840 Daucus carota INV3 gene Proteins 0.000 description 5
- 101100386725 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) DCS1 gene Proteins 0.000 description 5
- 102100033718 m7GpppX diphosphatase Human genes 0.000 description 5
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- 101100286980 Daucus carota INV2 gene Proteins 0.000 description 2
- 101100397045 Xenopus laevis invs-b gene Proteins 0.000 description 2
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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Abstract
A display device. The display device comprises a first switching circuit, a second switching circuit, a data signal selection circuit and a detection signal selection circuit. The first switching circuit receives a plurality of control signals and provides a plurality of data control signals according to the display state signal and the detection state signal. The data signal selection circuit transmits a plurality of display data to the touch panel according to the data control signal in the display time interval. The second switching circuit receives the control signal and provides a plurality of detection control signals according to the display state signal and the detection state signal. The detection signal selection circuit transmits a detection signal to the touch panel according to the detection control signal in a detection time interval.
Description
Technical Field
The present invention relates to a display device, and more particularly, to a display device capable of operating a data signal selection circuit and a detection signal selection circuit by using the same control signal.
Background
In the prior art, the display device with touch function can correspondingly provide display data to the touch panel according to the timing state of the first control signal through the data signal selection circuit. In addition, the display device can also correspondingly provide a detection signal to the touch panel according to the time sequence state of a second control signal different from the first control signal through the detection signal selection circuit so as to detect the touch state of the touch panel. It should be noted that, in the prior art, the data signal selection circuit and the detection signal selection circuit are usually controlled by different control signals (or connected to different control lines).
In this case, the number of pins (Pin) of the related circuits for generating the first control signal and the second control signal will be affected by different design requirements of the data signal selection circuit and the detection signal selection circuit, so that the number of pins is increased, and the overall cost of the display device is increased.
Disclosure of Invention
The invention provides a display device which enables a data signal selection circuit and a detection signal selection circuit to share the same control signal, thereby effectively reducing the number of pins and the overall cost of the display device.
The display device of the invention comprises a first switching circuit, a data signal selection circuit, a second switching circuit and a detection signal selection circuit. The first switching circuit is coupled to the control lines to receive the control signals respectively, and provides data control signals according to the display state signal and the detection state signal. The data signal selection circuit is coupled to the first switching circuit, and transmits a plurality of display data to the touch panel according to the data control signal in the display time interval. The second switching circuit is coupled to the control line to respectively receive the control signals, and provides a plurality of detection control signals according to the display state signal and the detection state signal. The detection signal selection circuit is coupled to the second switching circuit, and transmits a detection signal to the touch panel according to the detection control signal in a detection time interval.
Based on the above, the data signal selection circuit and the detection signal selection circuit of the display device of the invention can be commonly coupled to the same control line through the corresponding switching circuits respectively to receive the same control signal. Therefore, the display device can simultaneously control the operation actions of the data signal selection circuit and the detection signal selection circuit only through the control signals, so that the pin number and the overall cost of the display device are effectively reduced.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is a schematic Circuit Block diagram of a display device according to an embodiment of the invention.
Fig. 2 is a circuit diagram of a display device according to an embodiment of the invention.
FIG. 3 is a timing diagram illustrating the display apparatus shown in FIG. 2 according to an embodiment of the present invention.
Fig. 4 is a circuit diagram of a display device according to another embodiment of the present invention.
Fig. 5 is a circuit diagram of a display device according to still another embodiment of the present invention.
FIG. 6 is a timing diagram illustrating the display apparatus shown in FIG. 5 according to yet another embodiment of the present invention.
Wherein, the reference numbers:
100. 200, 400, 500: display device
110. 120, 210, 220, 410, 420, 510, 520: switching circuit
130. 230, 430, 530: data signal selection circuit
140. 240, 440, 540: detection signal selection circuit
150. 250, 450, 550: touch panel
160. 260, 460, 560: detection circuit
CL 1-CL 3: control wire
CS 1-CS 3: control signal
DCS 1-DCSN: data control signal
DS 1-DSN: displaying data
FVS: voltage potential signal
GOFF: detecting status signals
INV 1-INV 3: reverser
M11-M16, M21-M26, M31-M33, M41-M46: transistor with a metal gate electrode
TPSW: display status signal
TCS 11-TCS 1N: detecting control signals
TS: detecting the signal
T1: displaying time intervals
T2: detecting time intervals
VGH: high voltage of gate
VGL: very low voltage of gate
VGUARD: reference voltage
Detailed Description
The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:
the term "coupled" as used throughout this specification, including the claims, may refer to any direct or indirect connection. For example, if a first device couples (or connects) to a second device, it should be construed that the first device may be directly connected to the second device or the first device may be indirectly connected to the second device through some other device or some connection means. Further, wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts. Elements/components/steps in different embodiments using the same reference numerals or using the same terms may be referred to one another in relation to the description.
Fig. 1 is a schematic circuit block diagram of a display device 100 according to an embodiment of the invention. Referring to fig. 1, the display device 100 includes a switching circuit 110, a switching circuit 120, a data signal selection circuit 130, a detection signal selection circuit 140, a touch panel 150, and a detection circuit 160. The switching circuits 110 and 120 may be commonly coupled to the control lines CL 1-CL 3 to commonly receive the control signals CS 1-CS 3. The switching circuit 110 and the switching circuit 120 may also commonly receive the display state signal TPSW, the detection state signal GOFF, and the voltage level signal FVS. In the present embodiment, the display state signal TPSW is used for indicating the display device 100 operates in the display time interval, the detection state signal GOFF is used for indicating the display device 100 operates in the detection time interval, and the voltage level signal FVS is used for providing the voltage level having the gate high voltage or the gate low voltage.
In the present embodiment, the switching circuit 110 is configured to provide a plurality of data control signals DCS1 DCSN according to the display status signal TPSW and the detection status signal GOFF. The switching circuit 120 is configured to provide a plurality of detection control signals TCS 11-TCS 1N according to the display status signal TPSW and the detection status signal GOFF.
The data signal selection circuit 130 is coupled between the switching circuit 110 and the touch panel 150. The data signal selection circuit 130 receives the data control signals DCS 1-DCSN provided by the switching circuit 110, and the data signal selection circuit 130 can also receive a plurality of display data DS 1-DSN provided by a source driving circuit (not shown). The data signal selection circuit 130 can sequentially provide the display data DS 1-DSN to the rear touch panel 150 according to the timing states of the data control signals DCS 1-DCSN.
On the other hand, the detection signal selection circuit 140 is coupled between the switching circuit 120, the touch panel 150 and the detection circuit 160. The detection circuit 160 is configured to provide the detection signal TS to the detection signal selection circuit 140. Specifically, in the present embodiment, the detection signal selection circuit 140 may receive the detection control signals TCS11 to TCS1N and the detection signal TS. The detection signal selection circuit 140 can provide the detection signal TS to the rear touch panel 150 according to the timing states of the detection control signals TCS 11-TCS 1N.
The touch panel 150 is coupled to the data signal selection circuit 130 and the detection signal selection circuit 140 for receiving the display data DS 1-DSN and the detection signal TS, respectively. The touch panel 150 has a plurality of touch areas, and each touch area is composed of a plurality of pixel arrays. Further, when the display device 100 operates in the display time interval, the touch panel 150 may receive the display data DS 1-DSN and perform the operation of displaying the image according to the display data DS 1-DSN. In contrast, when the display device 100 operates in the detection time interval, the touch panel 150 can receive the detection signal TS, so that the detection circuit 160 can detect the touch state of each touch area according to the detection signal TS.
It should be noted that, the number of the control lines, the data control signals, the detection control signals and the display data can be determined by those skilled in the art according to the design requirement of the display device 100, and the embodiment is not limited to the above-mentioned number. Wherein, the N is a positive integer.
In detail, the display device 100 of the present embodiment can be operated in the display time interval and the detection time interval. When the display device 100 operates in the display time interval, the display device 100 can Enable (Enable) the switching circuit 110 and Disable (Disable) the switching circuit 120 according to the display status signal TPSW and the detection status signal GOFF, so that the switching circuit 110 can start the operation of the data signal selection circuit 130 and prompt the touch panel 150 to perform the operation of displaying the image. In contrast, when the display device 100 operates in the detection time interval, the display device 100 can enable the switching circuit 120 and disable the switching circuit 110 according to the display status signal TPSW and the detection status signal GOFF, so that the switching circuit 120 can start the operation of the detection signal selection circuit 140 and prompt the detection circuit 160 to start detecting the touch status of each touch area in the touch panel 150.
For example, when the display apparatus 100 operates in the display time interval, the display state signal TPSW may be set to the enabled state and the detection state signal GOFF may be set to the disabled state. The voltage potential signal FVS at this time may have a voltage potential of a gate high voltage. In this case, the switching circuit 110 may sequentially receive the control signals CS 1-CS 3 according to the display state signal TPSW and provide the control signals CS 1-CS 3 as data control signals (i.e., the data control signals DCS 1-DCS 3) to the data signal selection circuit 130. Then, the data signal selection circuit 130 can sequentially provide the display data DS1 DSN to the touch panel 150 according to the timing states of the data control signals DCS1 DCS 3.
It should be noted that, when the display device 100 operates in the display time interval, the switching circuit 120 receives the voltage level signal FVS according to the display state signal TPSW and provides the voltage level signal FVS having the voltage level of the gate high voltage as the detection control signal to the detection signal selecting circuit 140. Therefore, the display device 100 can avoid the floating or malfunction of the detection signal selection circuit 140 during the display time interval.
On the other hand, when the display apparatus 100 operates in the detection time interval, the display state signal TPSW may be set to the disable state and the detection state signal GOFF may be set to the enable state. The voltage potential signal FVS at this time may have a voltage potential of a gate low voltage. In this case, the switching circuit 120 may sequentially receive the control signals CS1 to CS3 according to the detection state signal GOFF, and provide the control signals CS1 to CS3 as detection control signals (i.e., the detection control signals TCS11 to TCS13) to the detection signal selection circuit 140. Then, the detection signal selection circuit 140 transmits the detection signal TS provided by the detection circuit 160 to the touch panel 150 according to the timing states of the detection control signals TCS 11-TCS 13, so that the detection circuit 160 detects the touch state of each touch area in the touch panel 150 according to the detection signal TS.
It should be noted that, in the case that the display device 100 operates in the detection time interval, the switching circuit 110 may receive the voltage level signal FVS according to the detection state signal GOFF and provide the voltage level signal FVS having the voltage level of the gate high voltage as the data control signal to the data signal selecting circuit 130. Therefore, the display device 100 can prevent the floating or malfunction of the data signal selection circuit 130 during the detection time interval.
As can be seen from the above description of the embodiment shown in fig. 1, the data signal selection circuit 130 and the detection signal selection circuit 140 of the display device 100 of the present embodiment can be commonly coupled to the same control lines CL1 through CL3 through the switching circuit 110 and the switching circuit 120, respectively, to receive the same control signals CS1 through CS 3. In this way, the display device 100 can simultaneously control the operation of the data signal selection circuit 130 and the detection signal selection circuit 140 only by the control signals CS 1-CS 3, thereby effectively reducing the number of pins and the overall cost of the display device 100.
Fig. 2 is a circuit diagram of a display device 200 according to an embodiment of the invention. Referring to fig. 2, the display device 200 includes a switching circuit 210, a switching circuit 220, a data signal selection circuit 230, a detection signal selection circuit 240, a touch panel 250, and a detection circuit 260. The display device 200, the switching circuit 210, the switching circuit 220, the data signal selection circuit 230, the detection signal selection circuit 240, the touch panel 250, and the detection circuit 260 shown in fig. 2 may be substantially the same as or similar to the display device 100, the switching circuit 110, the switching circuit 120, the data signal selection circuit 130, the detection signal selection circuit 140, the touch panel 150, and the detection circuit 160 shown in fig. 1, and the same or similar components are denoted by the same or similar reference numerals.
In the display device 200 of FIG. 2, the switching circuit 210 includes transistors M11-M16. The first terminal of the transistor M11 receives the voltage potential signal FVS, and the control terminal of the transistor M11 receives the detection state signal GOFF. The first terminal of the transistor M12 receives the control signal CS1, the second terminal of the transistor M12 is coupled to the second terminal of the transistor M11, and the control terminal of the transistor M12 receives the display state signal TPSW. The first terminal of the transistor M13 receives the voltage potential signal FVS, and the control terminal of the transistor M13 receives the detection state signal GOFF. The first terminal of the transistor M14 receives the control signal CS2, the second terminal of the transistor M14 is coupled to the second terminal of the transistor M13, and the control terminal of the transistor M14 receives the display state signal TPSW. The first terminal of the transistor M15 receives the voltage potential signal FVS, and the control terminal of the transistor M15 receives the detection state signal GOFF. The first terminal of the transistor M16 receives the control signal CS3, the second terminal of the transistor M16 is coupled to the second terminal of the transistor M15, and the control terminal of the transistor M16 receives the display state signal TPSW.
The switching circuit 220 includes transistors M21-M26. The first terminal of the transistor M21 receives the voltage potential signal FVS, and the control terminal of the transistor M21 receives the display state signal TPSW. The first terminal of the transistor M22 receives the control signal CS1, the second terminal of the transistor M22 is coupled to the second terminal of the transistor M21, and the control terminal of the transistor M22 receives the detection state signal GOFF. The first terminal of the transistor M23 receives the voltage potential signal FVS, and the control terminal of the transistor M23 receives the display state signal TPSW. The first terminal of the transistor M24 receives the control signal CS2, the second terminal of the transistor M24 is coupled to the second terminal of the transistor M23, and the control terminal of the transistor M24 receives the detection state signal GOFF. The first terminal of the transistor M25 receives the voltage potential signal FVS, and the control terminal of the transistor M25 receives the display state signal TPSW. The first terminal of the transistor M26 receives the control signal CS3, the second terminal of the transistor M26 is coupled to the second terminal of the transistor M25, and the control terminal of the transistor M26 receives the detection state signal GOFF.
On the other hand, the data signal selection circuit 230 includes transistors M31 to M33. The first terminal of the transistor M31 is coupled to the touch panel 250, the second terminal of the transistor M31 receives the display data DS1, and the control terminal of the transistor M31 is coupled to the second terminals of the transistors M15 and M16 to receive the data control signal DCS 1. The first terminal of the transistor M32 is coupled to the touch panel 250, the second terminal of the transistor M32 receives the display data DS2, and the control terminal of the transistor M32 is coupled to the second terminals of the transistors M13 and M14 to receive the data control signal DCS 2. The first terminal of the transistor M33 is coupled to the touch panel 250, the second terminal of the transistor M33 receives the display data DS3, and the control terminal of the transistor M33 is coupled to the second terminals of the transistors M11 and M12 to receive the data control signal DCS 3.
The detection signal selection circuit 240 includes transistors M41 to M46. The first terminal of the transistor M41 is coupled to the detection circuit 260, the second terminal of the transistor M41 is coupled to the touch panel 250, and the control terminal of the transistor M41 is coupled to the second terminals of the transistors M21 and M22 for receiving the detection control signal TCS 11. The first terminal of the transistor M42 is coupled to the detection circuit 260, the second terminal of the transistor M42 is coupled to the touch panel 250, and the control terminal of the transistor M42 is coupled to the second terminals of the transistors M23 and M24 for receiving the detection control signal TCS 12. The first terminal of the transistor M43 is coupled to the detection circuit 260, the second terminal of the transistor M43 is coupled to the touch panel 250, and the control terminal of the transistor M43 is coupled to the second terminals of the transistors M25 and M26 for receiving the detection control signal TCS 13.
The first terminal of the transistor M44 receives the reference voltage VGUARD, the second terminal of the transistor M44 is coupled to the second terminal of the transistor M41, the control terminal of the transistor M44 is coupled to the output terminal of the inverter INV1, and the input terminal of the inverter INV1 is coupled to the second terminals of the transistors M21 and M22. The first terminal of the transistor M45 receives the reference voltage VGUARD, the second terminal of the transistor M45 is coupled to the second terminal of the transistor M42, the control terminal of the transistor M45 is coupled to the output terminal of the inverter INV2, and the input terminal of the inverter INV2 is coupled to the second terminals of the transistors M23 and M24. The first terminal of the transistor M46 receives the reference voltage VGUARD, the second terminal of the transistor M46 is coupled to the second terminal of the transistor M43, the control terminal of the transistor M46 is coupled to the output terminal of the inverter INV3, and the input terminal of the inverter INV3 is coupled to the second terminals of the transistors M25 and M26.
In particular, in the detection signal selection circuit 240, when the transistors M44 to M46 are in the off state, the detection signal selection circuit 240 may receive the reference voltage VGUARD to prevent the transistors M44 to M46 from malfunctioning due to the floating state.
FIG. 3 is a timing diagram illustrating the display apparatus 200 shown in FIG. 2 according to an embodiment of the invention. Referring to fig. 2 and 3, in detail, when the display device 200 operates in the display time interval T1, the display state signal TPSW may be set to an enabled state (e.g., a high voltage level) and the detection state signal GOFF may be set to a disabled state (e.g., a low voltage level). The voltage potential signal FVS at this time may have a voltage potential of the gate high voltage VGH. In this case, the transistors M12, M14, M16 of the switching circuit 210 can be turned on according to the display state signal TPSW, and the transistors M12, M14, M16 can sequentially receive the control signals CS1 to CS3 and provide the control signals CS1 to CS3 as the data control signals DCS1 to DCS3 to be respectively provided to the transistors M31 to M33 of the data signal selecting circuit 230.
Then, the transistors M31-M33 can be turned on sequentially according to the timing states of the data control signals DCS 1-DCS 3 (or the control signals CS 1-CS 3). The data signal selection circuit 230 can sequentially provide the display data DS1 to DS3 to the touch panel 250 according to the timing states of the data control signals DCS1 to DCS3, so that the touch panel 250 displays the image according to the display data DS1 to DS 3.
Meanwhile, the transistors M21, M23, M25 of the switching circuit 220 can be turned on according to the display state signal TPSW, and the transistors M21, M23, M25 can receive the voltage potential signal FVS, so that the voltage potential signal FVS having the voltage potential of the gate high voltage VGH is used as the detection control signals TCS11 to TCS13 to be provided to the transistors M41 to M43 of the detection signal selection circuit 240. It should be noted that the display device 200 can perform the inverse operations on the detection control signals TCS11 to TCS13 through the inverters INV1 to INV3, respectively, so as to correspondingly provide the detection control signals TCS14 to TCS16 to the transistors M44 to M46. Thus, the display device 200 can prevent the detection signal selection circuit 240 from floating or malfunctioning during the display time interval T1.
On the other hand, when the display device 200 operates in the detection time interval T2, the display state signal TPSW may be set to a disabled state (e.g., a low voltage level) and the detection state signal GOFF may be set to an enabled state (e.g., a high voltage level). The voltage potential signal FVS at this time may have a voltage potential of the gate low voltage VGL. In this case, the transistors M22, M24, M26 of the switching circuit 220 can be turned on according to the detection state signal GOFF, and the transistors M22, M24, M26 can sequentially receive the control signals CS1 to CS3, and use the control signals CS1 to CS3 as the detection control signals TCS11 to TCS13 to be respectively provided to the transistors M41 to M43 of the detection signal selection circuit 240. The display device 200 may provide the detection control signals TCS14 to TCS16 to the transistors M44 to M46 according to the detection control signals TCS11 to TCS13 through the inverters INV1 to INV3, respectively.
Then, the transistors M41-M43 of the detection signal selection circuit 240 can be sequentially turned on according to the timing states of the detection control signals TCS 11-TCS 13 (or the control signals CS 1-CS 3), and the transistors M44-M46 can be sequentially turned off according to the timing states of the detection control signals TCS 14-TCS 16. In this case, the detection circuit 260 may provide the detection signal TS to the touch panel 250 through the transistors M41 to M43, so that the detection circuit 260 may detect the touch state of each touch area in the touch panel 250 according to the detection signal TS.
Meanwhile, the transistors M11, M13, M15 of the switching circuit 210 can be turned on according to the detection state signal GOFF, and the transistors M11, M13, M15 can receive the voltage level signal FVS, so as to use the voltage level signal FVS having the voltage level of the gate low voltage VGL as the data control signals DCS1 to DCS3 to be provided to the data signal selection circuit 230. Thus, the display device 200 can prevent the floating or malfunction of the data signal selection circuit 230 during the detection time interval T2.
Fig. 4 is a circuit diagram of a display device 400 according to another embodiment of the invention. Referring to fig. 4, the display device 400 includes a switching circuit 410, a switching circuit 420, a data signal selection circuit 430, a detection signal selection circuit 440, a touch panel 450, and a detection circuit 460. The display device 400, the switching circuit 410, the switching circuit 420, the data signal selection circuit 430, the detection signal selection circuit 440, the touch panel 450, and the detection circuit 460 shown in fig. 4 may be substantially the same as or similar to the display device 200, the switching circuit 210, the switching circuit 220, the data signal selection circuit 230, the detection signal selection circuit 240, the touch panel 250, and the detection circuit 260 shown in fig. 2, and the same or similar components are denoted by the same or similar reference numerals. Unlike the embodiment of FIG. 2, in the present embodiment, the display apparatus 400 does not need to provide the detection control signals TCS14 TCS16 to the detection signal selection circuit 440 according to the detection control signals TCS11 TCS13 through the inverters INV1 INV 3. In other words, the detection signal selection circuit 440 may receive these detection control signals TCS14 to TCS16 directly through an external device. The display device 400, the switching circuit 410, the switching circuit 420, the data signal selection circuit 430, the detection signal selection circuit 440, the touch panel 450, and the detection circuit 460 shown in fig. 4 can be analogized by referring to the related descriptions of the display device 200, the switching circuit 210, the switching circuit 220, the data signal selection circuit 230, the detection signal selection circuit 240, the touch panel 250, and the detection circuit 260 mentioned in fig. 2, and therefore are not described again.
Fig. 5 is a circuit diagram of a display device 500 according to still another embodiment of the invention. Referring to fig. 5, the display device 500 includes a switching circuit 510, a switching circuit 520, a data signal selection circuit 530, a detection signal selection circuit 540, a touch panel 550, and a detection circuit 560. The display device 500, the switching circuit 510, the switching circuit 520, the data signal selection circuit 530, the detection signal selection circuit 540, the touch panel 550, and the detection circuit 560 shown in fig. 5 are substantially the same as or similar to the display device 200, the switching circuit 210, the switching circuit 220, the data signal selection circuit 230, the detection signal selection circuit 240, the touch panel 250, and the detection circuit 260 shown in fig. 2. And the same or similar elements are given the same or similar reference numerals. Unlike the embodiment of fig. 2, in the present embodiment, the switching circuits 510 and 520 of the display device 500 may not need to receive the voltage potential signal FVS.
Specifically, the switching circuit 510 includes transistors M11 to M16. The first terminal of the transistor M11 receives the display status signal TPSW, and the control terminal of the transistor M11 receives the detection status signal GOFF. The first terminal of the transistor M12 receives the control signal CS1, the second terminal of the transistor M12 is coupled to the second terminal of the transistor M11, and the control terminal of the transistor M12 receives the display state signal TPSW. The first terminal of the transistor M13 receives the display status signal TPSW, and the control terminal of the transistor M13 receives the detection status signal GOFF. The first terminal of the transistor M14 receives the control signal CS2, the second terminal of the transistor M14 is coupled to the second terminal of the transistor M13, and the control terminal of the transistor M14 receives the display state signal TPSW. The first terminal of the transistor M15 receives the display status signal TPSW, and the control terminal of the transistor M15 receives the detection status signal GOFF. The first terminal of the transistor M16 receives the control signal CS3, the second terminal of the transistor M16 is coupled to the second terminal of the transistor M15, and the control terminal of the transistor M16 receives the display state signal TPSW.
On the other hand, the switching circuit 520 includes transistors M21 to M26. The first terminal and the control terminal of the transistor M21 commonly receive the display status signal TPSW. The first terminal of the transistor M22 receives the control signal CS1, the second terminal of the transistor M22 is coupled to the second terminal of the transistor M21, and the control terminal of the transistor M22 receives the detection state signal GOFF. The first terminal and the control terminal of the transistor M23 commonly receive the display status signal TPSW. The first terminal of the transistor M24 receives the control signal CS2, the second terminal of the transistor M24 is coupled to the second terminal of the transistor M23, and the control terminal of the transistor M24 receives the detection state signal GOFF. The first terminal and the control terminal of the transistor M25 commonly receive the display status signal TPSW. The first terminal of the transistor M26 receives the control signal CS3, the second terminal of the transistor M26 is coupled to the second terminal of the transistor M25, and the control terminal of the transistor M26 receives the detection state signal GOFF.
FIG. 6 is a timing diagram illustrating the display apparatus 500 shown in FIG. 5 according to yet another embodiment of the present invention. Referring to fig. 5 and fig. 6, in the present embodiment, when the display device 500 operates in the display time interval T1, the transistors M21, M23, and M25 of the switching circuit 520 may be turned on according to the display state signal TPSW set to an enabled state (e.g., a high voltage level), and the transistors M21, M23, and M25 may receive the display state signal TPSW, so as to use the display state signal TPSW having the high voltage level as the detection control signals TCS11 to TCS13, and provide the detection control signals to the transistors M41 to M43 of the detection signal selection circuit 540. The display device 500 may perform an inversion operation on the detection control signals TCS11 to TCS13 by the inverters INV1 to INV3, respectively, to correspondingly provide the detection control signals TCS14 to TCS16 to the transistors M44 to M46. Thus, the display device 500 can prevent the floating or malfunction of the detection signal selection circuit 540 during the display time interval T1 even when the voltage potential signal FVS is not received.
In contrast, when the display device 500 operates in the detection time interval T2, the transistors M11, M13, M15 of the switching circuit 510 can be turned on according to the detection state signal GOFF set to the enabled state (e.g., high voltage level), and the transistors M11, M13, M15 can receive the display state signal TPSW, so as to provide the display state signal TPSW with low voltage level as the data control signals DCS 1-DCS 3 to the data signal selection circuit 530. Thus, the display device 500 can prevent the floating or malfunction of the data signal selection circuit 530 during the detection time interval T2 even when the voltage potential signal FVS is not received.
It should be noted that, in the display time interval T1 and the detection time interval T2, the operation details of the switching circuit 510, the switching circuit 520, the data signal selection circuit 530, the detection signal selection circuit 540, the touch panel 550 and the detection circuit 560 of the display device 500 can be analogized with reference to the related descriptions of the switching circuit, the data signal selection circuit, the detection signal selection circuit, the touch panel and the detection circuit mentioned in fig. 1, fig. 2 and/or fig. 4, and therefore, the description thereof is omitted.
In summary, the data signal selection circuit and the detection signal selection circuit of the display device of the invention can be coupled to the same control line through the corresponding switching circuits respectively to receive the same control signal. Therefore, the display device can simultaneously control the operation actions of the data signal selection circuit and the detection signal selection circuit only through the control signals, so that the pin number and the overall cost of the display device are effectively reduced.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. A display device, comprising:
a first switching circuit, coupled to the control lines, for receiving the control signals, respectively, and providing data control signals according to a display status signal and a detection status signal;
a data signal selection circuit, coupled to the first switching circuit, for transmitting a plurality of display data to a touch panel according to the data control signals during a display time interval;
a second switching circuit coupled to the control lines for receiving the control signals, the second switching circuit providing a plurality of detection control signals according to the display status signal and the detection status signal; and
and a detection signal selection circuit coupled to the second switching circuit and transmitting a detection signal to the touch panel according to the detection control signals in a detection time interval.
2. The display apparatus according to claim 1, wherein the first switching circuit makes the control signals serve as the data control signals according to the display status signal and the detection status signal during the display time interval, and provides the data control signals to the data signal selection circuit, and the second switching circuit makes the control signals serve as the detection control signals according to the display status signal and the detection status signal during the detection time interval, and provides the detection control signals to the detection signal selection circuit.
3. The display device of claim 1, wherein the first switching circuit and the second switching circuit receive a voltage level signal having a gate high voltage or a gate low voltage,
in the display time interval, the second switching circuit makes the voltage potential signal with the high gate voltage serve as the detection control signals according to the display state signal and the detection state signal, and provides the detection control signals to the detection signal selection circuit, and
in the detection time interval, the first switching circuit makes the voltage potential signal with the low grid voltage serve as the data control signals according to the display state signal and the detection state signal, and provides the data control signals to the data signal selection circuit.
4. The display device according to claim 1, further comprising:
and the detection circuit is coupled to the detection signal selection circuit, and generates the detection signal and transmits the detection signal to the touch panel through the detection signal selection circuit in the detection time interval.
5. The display apparatus according to claim 1, wherein the display status signal is set to an enabled state and the detection status signal is set to a disabled state during the display time interval, and wherein the display status signal is set to a disabled state and the detection status signal is set to an enabled state during the detection time interval.
6. The display device according to claim 1, wherein the control signals include a first control signal, a second control signal and a third control signal, and wherein the first switching circuit comprises:
a first transistor, the first end of which receives the display status signal and the control end of which receives the detection status signal;
a second transistor, a first terminal of which receives the first control signal, a second terminal of which is coupled to the second terminal of the first transistor, and a control terminal of which receives the display status signal;
a third transistor, the first end of which receives the display status signal and the control end of which receives the detection status signal;
a fourth transistor, a first terminal of which receives the second control signal, a second terminal of which is coupled to the second terminal of the third transistor, and a control terminal of which receives the display state signal;
a fifth transistor, the first end of which receives the display status signal and the control end of which receives the detection status signal; and
a sixth transistor having a first terminal receiving the third control signal, a second terminal coupled to the second terminal of the fifth transistor, and a control terminal receiving the display status signal.
7. The display device according to claim 6, wherein the second switching circuit comprises:
a seventh transistor, the first end and the control end of which jointly receive the display status signal;
an eighth transistor, a first terminal of which receives the first control signal, a second terminal of which is coupled to the second terminal of the seventh transistor, and a control terminal of which receives the detection status signal;
a ninth transistor, the first end and the control end of which jointly receive the display status signal;
a tenth transistor having a first terminal receiving the second control signal, a second terminal coupled to the second terminal of the ninth transistor, and a control terminal receiving the detection status signal;
an eleventh transistor, a first terminal and a control terminal of which commonly receive the display status signal; and
a twelfth transistor having a first terminal receiving the third control signal, a second terminal coupled to the second terminal of the eleventh transistor, and a control terminal receiving the detection status signal.
8. The display device according to claim 3, wherein the control signals include a first control signal, a second control signal and a third control signal, and wherein the first switching circuit comprises:
a first transistor, the first end of which receives the voltage potential signal and the control end of which receives the detection state signal;
a second transistor, a first terminal of which receives the first control signal, a second terminal of which is coupled to the second terminal of the first transistor, and a control terminal of which receives the display status signal;
a third transistor, having a first end receiving the voltage potential signal and a control end receiving the detection state signal;
a fourth transistor, a first terminal of which receives the second control signal, a second terminal of which is coupled to the second terminal of the third transistor, and a control terminal of which receives the display state signal;
a fifth transistor, the first terminal of which receives the voltage potential signal and the control terminal of which receives the detection state signal; and
a sixth transistor having a first terminal receiving the third control signal, a second terminal coupled to the second terminal of the fifth transistor, and a control terminal receiving the display status signal.
9. The display apparatus of claim 8, wherein the second switching circuit comprises:
a seventh transistor, the first terminal of which receives the voltage potential signal and the control terminal of which receives the display status signal;
an eighth transistor, a first terminal of which receives the first control signal, a second terminal of which is coupled to the second terminal of the seventh transistor, and a control terminal of which receives the detection status signal;
a ninth transistor, a first end of which receives the voltage potential signal and a control end of which receives the display state signal;
a tenth transistor having a first terminal receiving the second control signal, a second terminal coupled to the second terminal of the ninth transistor, and a control terminal receiving the detection status signal;
an eleventh transistor having a first terminal receiving the voltage level signal and a control terminal receiving the display status signal; and
a twelfth transistor having a first terminal receiving the third control signal, a second terminal coupled to the second terminal of the eleventh transistor, and a control terminal receiving the detection status signal.
10. The display device of claim 1, wherein the display data comprises a first display data, a second display data and a third display data, and wherein the data signal selection circuit comprises:
a first transistor, a first terminal of which is coupled to the touch panel, a second terminal of which receives the first display data, and a control terminal of which is coupled to the first switching circuit;
a second transistor, a first terminal of which is coupled to the touch panel, a second terminal of which receives the second display data, and a control terminal of which is coupled to the first switching circuit; and
a third transistor, a first terminal of which is coupled to the touch panel, a second terminal of which receives the third display data, and a control terminal of which is coupled to the first switching circuit.
11. The display device according to claim 4, wherein the detection signal selection circuit comprises:
a first transistor, having a first terminal coupled to the detection circuit, a second terminal coupled to the touch panel, and a control terminal coupled to the second switching circuit;
a second transistor, wherein a first terminal of the second transistor is coupled to the detection circuit, a second terminal of the second transistor is coupled to the touch panel, and a control terminal of the second transistor is coupled to the second switching circuit;
a third transistor, wherein a first terminal of the third transistor is coupled to the detection circuit, a second terminal of the third transistor is coupled to the touch panel, and a control terminal of the third transistor is coupled to the second switching circuit;
a fourth transistor, wherein a first terminal of the fourth transistor receives a reference voltage, a second terminal of the fourth transistor is coupled to the second terminal of the first transistor, and a control terminal of the fourth transistor is coupled to the second switching circuit;
a fifth transistor, a first terminal of which receives the reference voltage, a second terminal of which is coupled to the second terminal of the second transistor, and a control terminal of which is coupled to the second switching circuit; and
a sixth transistor, having a first terminal receiving the reference voltage, a second terminal coupled to the second terminal of the third transistor, and a control terminal coupled to the second switching circuit.
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| TW202040544A (en) | 2020-11-01 |
| CN111007955B (en) | 2023-03-17 |
| TWI688931B (en) | 2020-03-21 |
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