CN111007955B - Display device - Google Patents

Abstract

A display device. The display device includes first and second switching circuits, a data signal selection circuit and a detection signal selection circuit. The first switch circuit receives a plurality of control signals, and provides a plurality of data control signals according to the display status signal and the detection status signal. The data signal selection circuit transmits a plurality of display data to the touch panel according to the data control signal during 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 the detection signal to the touch panel according to the detection control signal during the detection time interval.

Description

display device

technical field

The present invention relates to a display device, and in particular to a display device capable of enabling a data signal selection circuit and a detection signal selection circuit to share the same control signal for operation.

Background technique

In the conventional technology, the display device with touch function can provide display data to the touch panel correspondingly according to the timing state of the first control signal through the data signal selection circuit. Moreover, the display device can also provide a corresponding detection signal to the touch panel through the detection signal selection circuit according to the timing state of the second control signal different from the first control signal, so as to detect the touch of the touch panel. control status. It is worth mentioning 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 (Pins) of the relevant 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. As a result, the number of pins is increased, and the overall cost of the display device is increased.

Contents of the invention

The present invention provides a display device that enables the data signal selection circuit and the 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 present invention includes 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 a plurality of control lines to respectively receive a plurality of control signals, and the first switching circuit provides a plurality of data control signals according to the display status signal and the detection status signal. The data signal selection circuit is coupled to the first switching circuit, and in the display time interval, the data signal selection circuit transmits a plurality of display data to the touch panel according to the data control signal. The second switching circuit is coupled to the control lines to respectively receive the control signals, and the second switching circuit 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 during the detection time interval, the detection signal selection circuit transmits the detection signal to the touch panel according to the detection control signal.

Based on the above, the data signal selection circuit and the detection signal selection circuit of the display device of the present invention can be jointly coupled to the same control line through respective switching circuits to receive the same control signal. In this way, the display device of the present invention can simultaneously control the operation of the data signal selection circuit and the detection signal selection circuit only through these control signals, thereby effectively reducing the number of pins and the overall cost of the display device.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

FIG. 1 is a schematic diagram of a circuit block 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 device shown in FIG. 2 according to an embodiment of the 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 yet another embodiment of the present invention.

FIG. 6 is a timing diagram illustrating the display device shown in FIG. 5 according to yet another embodiment of the present invention.

Among them, reference signs:

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

CL1～CL3: control line

CS1～CS3: Control signal

DCS1~DCSN: data control signal

DS1～DSN: display data

FVS: voltage potential signal

GOFF: detection status signal

INV1～INV3: Inverter

M11～M16, M21～M26, M31～M33, M41～M46: Transistor

TPSW: display status signal

TCS11～TCS1N: detection control signal

TS: Heartbeat

T1: display time interval

T2: detection time interval

VGH: gate high voltage

VGL: Gate Low Voltage

VGUARD: reference voltage

Detailed ways

Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

The term "coupled (or connected)" used throughout the specification (including claims) of this application may refer to any direct or indirect means of connection. For example, if it is described that a first device is coupled (or connected) to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be connected to the second device through other devices or certain A connection means indirectly connected to the second device. In addition, wherever possible, elements/components/steps using the same reference numerals in the drawings and embodiments represent the same or similar parts. Elements/components/steps using the same symbols or using the same terms in different embodiments can refer to related descriptions.

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 circuit 110 and the switching circuit 120 can be commonly coupled to the control lines CL1 - CL3 to receive the control signals CS1 - CS3 in common. Moreover, the switching circuit 110 and the switching circuit 120 can also jointly receive the display state signal TPSW, the detection state signal GOFF and the voltage potential signal FVS. Wherein, in this embodiment, the display state signal TPSW can be used to indicate that the display device 100 is operating in the display time interval, the detection state signal GOFF can be used to indicate that the display device 100 is operating in the detection time interval, and the voltage level signal FVS can be used to provide Voltage potential for high voltage or gate low voltage.

In this embodiment, the switching circuit 110 can be used to provide a plurality of data control signals DCS1 -DCSN according to the display state signal TPSW and the detection state signal GOFF. The switching circuit 120 can be used to provide a plurality of detection control signals TCS11 - TCS1N according to the display state signal TPSW and the detection state 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 DCS1~DCSN provided by the switching circuit 110, and the data signal selection circuit 130 can also receive a plurality of display data DS1~DSN provided by the source driving circuit (not shown). . Wherein, the data signal selection circuit 130 can sequentially provide the display data DS1 -DSN to the rear touch panel 150 according to the timing states of the data control signals DCS1 -DCSN.

On the other hand, the detection signal selection circuit 140 is coupled between the switch circuit 120 , the touch panel 150 and the detection circuit 160 . Wherein, the detection circuit 160 can be used to provide the detection signal TS to the detection signal selection circuit 140 . Specifically, in this embodiment, the detection signal selection circuit 140 can receive the detection control signals TCS11 - TCS1N and the detection signal TS. Moreover, 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 TCS11 - TCS1N.

The touch panel 150 is coupled to the data signal selection circuit 130 and the detection signal selection circuit 140 to receive the display data DS1 -DSN and the detection signal TS respectively. Wherein, the touch panel 150 has a plurality of touch areas, and each touch area is composed of a plurality of pixel arrays. Furthermore, when the display device 100 is operating in the display time interval, the touch panel 150 can receive the display data DS1 -DSN, and perform the operation of displaying the screen according to these display data DS1 -DSN. In contrast, when the display device 100 is operating 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 those skilled in the art can determine the quantity of the above-mentioned control lines, data control signals, detection control signals and display data according to the design requirements of the display device 100, and this embodiment is not limited to the above-mentioned numbers . Wherein, the aforementioned N is a positive integer.

Regarding the details of the operation of the display device 100 , in detail, the display device 100 of this embodiment can operate in a display time interval and a detection time interval. Wherein, 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 state signal TPSW and the detection state signal GOFF, so that the switching circuit 110 can start the operation action of the data signal selection circuit 130 and prompt the touch panel 150 to perform the operation of displaying the picture. In contrast, when the display device 100 is operating 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 activate the detection signal The operation action of the selection circuit 140 prompts the detection circuit 160 to start detecting the touch state of each touch area in the touch panel 150 .

For example, when the display device 100 is operating in the display time interval, the display state signal TPSW may be set to an enabled state and the detection state signal GOFF may be set to a disabled state. Also, the voltage level signal FVS at this time may have a voltage level of the gate high voltage. In this case, the switching circuit 110 can receive the control signals CS1-CS3 sequentially according to the display state signal TPSW, and use the control signals CS1-CS3 as data control signals (that is, data control signals DCS1-DCS3) to provide To the data signal selection circuit 130. Next, 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 -DCS3 .

It is worth mentioning that, when the display device 100 is operating in the display time interval, the switch circuit 120 can receive the voltage level signal FVS according to the display state signal TPSW, and convert the voltage level signal FVS with the voltage level of the gate high voltage to It is provided to the detection signal selection circuit 140 as a detection control signal. In this way, the display device 100 can prevent the detection signal selection circuit 140 from floating or malfunctioning when displaying the time interval.

On the other hand, when the display device 100 is operating in the detection time interval, the display state signal TPSW may be set to a disabled state and the detection state signal GOFF may be set to an enabled state. Also, the voltage level signal FVS at this time may have a voltage level of the gate low voltage. In this case, the switching circuit 120 can receive the control signals CS1-CS3 sequentially according to the detection status signal GOFF, and use the control signals CS1-CS3 as the detection control signals (that is, the detection control signals TCS11-TCS13) to provide to the detection signal selection circuit 140. Next, the detection signal selection circuit 140 can transmit 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 TCS11 - TCS13 , and then make the detection circuit 160 perform touch control according to the detection signal TS. The touch state of each touch area in the control panel 150 is detected.

It is worth mentioning that when the display device 100 is operating in the detection time interval, the switching circuit 110 can receive the voltage level signal FVS according to the detection state signal GOFF, and convert the voltage level signal FVS with the voltage level of the gate high voltage to As a data control signal, it is provided to the data signal selection circuit 130 . Thereby, the display device 100 can prevent the data signal selection circuit 130 from floating or malfunctioning when detecting the time interval.

According to the description of the embodiment in FIG. 1 above, it can be known that in the data signal selection circuit 130 and the detection signal selection circuit 140 of the display device 100 in this embodiment, they can be jointly coupled to The same control lines CL1-CL3 are used to receive the same control signals CS1-CS3. In this way, the display device 100 can simultaneously control the operations of the data signal selection circuit 130 and the detection signal selection circuit 140 only through the control signals CS1 - CS3 , 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 . Wherein, the display device 200, switching circuit 210, switching circuit 220, data signal selection circuit 230, detection signal selection circuit 240, touch panel 250, and detection circuit 260 shown in FIG. 2 may be roughly the same or similar to those shown in FIG. 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 , and the same or similar components use the same or similar reference numerals.

In the display device 200 of FIG. 2 , the switch circuit 210 includes transistors M11 - M16 . The first end of the transistor M11 receives the voltage potential signal FVS, and the control end 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 end of the transistor M13 receives the voltage potential signal FVS, and the control end 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 end of the transistor M15 receives the voltage potential signal FVS, and the control end 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 end of the transistor M21 receives the voltage potential signal FVS, and the control end 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 crystal M21, and the control terminal of the transistor M22 receives the detection status signal GOFF. The first end of the transistor M23 receives the voltage potential signal FVS, and the control end 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 status signal GOFF. The first end of the transistor M25 receives the voltage level signal FVS, and the control end 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 status signal GOFF.

On the other hand, the data signal selection circuit 230 includes transistors M31-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 DCS1 . 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 DCS2 . 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 DCS3 .

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, the control terminal of the transistor M41 is coupled to the second terminals of the transistors M21 and M22 to receive the detection control signal TCS11 . 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, the control terminal of the transistor M42 is coupled to the second terminals of the transistors M23 and M24 to receive the detection control signal TCS12 . 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, the control terminal of the transistor M43 is coupled to the second terminals of the transistors M25 and M26 to receive the detection control signal TCS13 .

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 inverter INV1 The input terminal of is coupled to the second terminal of the transistors M21, 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 inverter INV2 The input end of is coupled to the second end of the transistors M23, 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 inverter INV3 The input terminal of is coupled to the second terminal of the transistor M25, M26.

In particular, in the detection signal selection circuit 240, when the transistors M44-M46 are in the off state, the detection signal selection circuit 240 can receive the reference voltage VGUARD to prevent the transistors M44-M46 from being in a floating state. resulting in malfunction.

FIG. 3 is a timing diagram illustrating the display device 200 shown in FIG. 2 according to an embodiment of the present invention. Regarding the details of the operation of the display device 200, please refer to FIG. 2 and FIG. potential) and the detection state signal GOFF can be set to a disabled state (eg, a low voltage level). Also, the voltage level signal FVS at this time may have a voltage level of the gate high voltage VGH. In this case, the transistors M12, M14, and M16 of the switching circuit 210 can be turned on according to the display state signal TPSW, and these transistors M12, M14, and M16 can receive the control signals CS1-CS3 in sequence, and turn on the control signal CS1. ˜CS3 are used as data control signals DCS1 ˜ DCS3 to be respectively provided to transistors M31 ˜ M33 of the data signal selection circuit 230 .

Next, the transistors M31 - M33 can be turned on sequentially according to the timing states of the data control signals DCS1 - DCS3 (or control signals CS1 - CS3 ). Moreover, the data signal selection circuit 230 can sequentially provide the display data DS1-DS3 to the touch panel 250 according to the timing states of the data control signals DCS1-DCS3, so that the touch panel 250 can display according to the display data DS1-DS3. picture.

At the same time, the transistors M21, M23, and M25 of the switching circuit 220 can be turned on according to the display state signal TPSW, and these transistors M21, M23, and M25 can receive the voltage potential signal FVS to switch the voltage with the gate high voltage VGH to The potential voltage level signal FVS is used as the detection control signals TCS11 ˜ TCS13 to be provided to the transistors M41 ˜ M43 of the detection signal selection circuit 240 . It should be noted that the display device 200 can respectively perform inverse actions on the detection control signals TCS11 - TCS13 through the inverters INV1 - INV3 , so as to provide the detection control signals TCS14 - TCS16 to the transistors M44 - M46 correspondingly. In this way, the display device 200 can prevent the detection signal selection circuit 240 from floating or malfunctioning when displaying the time interval T1.

On the other hand, when the display device 200 operates in the detection time interval T2, the display state signal TPSW can be set to a disabled state (for example, a low voltage level) and the detection state signal GOFF can be set to an enabled state (for example, is the high voltage potential). Also, the voltage level signal FVS at this time may have a voltage level of the gate low voltage VGL. In this case, the transistors M22, M24, and M26 of the switching circuit 220 can be turned on according to the detection state signal GOFF, and these transistors M22, M24, and M26 can receive the control signals CS1-CS3 in sequence, and turn on the control signal CS1. ˜CS3 are used as detection control signals TCS11 ˜TCS13 to be respectively provided to transistors M41 ˜ M43 of the detection signal selection circuit 240 . Moreover, the display device 200 can provide the detection control signals TCS14 - TCS16 to the transistors M44 - M46 through the inverters INV1 - INV3 respectively according to the detection control signals TCS11 - TCS13 .

Next, 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 TCS11-TCS13 (or control signals CS1-CS3), and the transistors M44-M46 can be turned on according to the detection control signal TCS14 ~ TCS16 sequential state and sequentially turned off. In this case, the detection circuit 260 can provide the detection signal TS to the touch panel 250 through the transistors M41-M43, so that the detection circuit 260 can touch each touch area in the touch panel 250 according to the detection signal TS. status is checked.

At the same time, the transistors M11, M13, and M15 of the switching circuit 210 can be turned on according to the detection state signal GOFF, and these transistors M11, M13, and M15 can receive the voltage level signal FVS to switch the voltage with the gate low voltage VGL to The potential voltage level signal FVS is provided to the data signal selection circuit 230 as the data control signals DCS1 - DCS3 . In this way, the display device 200 can prevent the data signal selection circuit 230 from floating or malfunctioning when detecting the time interval T2.

FIG. 4 is a circuit diagram of a display device 400 according to another embodiment of the present 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 . Among them, the display device 400, switching circuit 410, switching circuit 420, data signal selection circuit 430, detection signal selection circuit 440, touch panel 450, and detection circuit 460 shown in FIG. 4 may be roughly the same or similar to those shown in FIG. The display device 200 , the switch circuit 210 , the switch circuit 220 , the data signal selection circuit 230 , the detection signal selection circuit 240 , the touch panel 250 , and the detection circuit 260 , and the same or similar components use the same or similar reference numerals. Different from the embodiment shown in FIG. 2 , in this embodiment, the display device 400 does not need to use the inverters INV1 ˜ INV3 to provide the detection control signals TCS14 ˜ TCS16 to the detection signal selection circuit 440 according to the detection control signals TCS11 ˜ TCS13 . In other words, the detection signal selection circuit 440 can directly receive these detection control signals TCS14 - TCS16 through an external device. Wherein, 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 refer to the display device 200 mentioned in FIG. , 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 are analogously described, so details are not repeated here.

FIG. 5 is a circuit diagram of a display device 500 according to yet another embodiment of the present 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 . Among them, the display device 500, switching circuit 510, switching circuit 520, data signal selection circuit 530, detection signal selection circuit 540, touch panel 550 and detection circuit 560 shown in FIG. 5 are substantially the same or similar to the display shown in FIG. The 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 . And the same or similar elements use the same or similar reference numerals. Different from the embodiment in FIG. 2 , in this embodiment, the switching circuits 510 and 520 of the display device 500 do not need to receive the voltage level signal FVS.

Specifically, the switching circuit 510 includes transistors M11 - M16 . The first end of the transistor M11 receives the display state signal TPSW, and the control end 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 end of the transistor M13 receives the display state signal TPSW, and the control end 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 end of the transistor M15 receives the display state signal TPSW, and the control end 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.

On the other hand, the switching circuit 520 includes transistors M21-M26. The first end of the transistor M21 and the control end jointly receive 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 status signal GOFF. The first end of the transistor M23 and the control end jointly receive 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 status signal GOFF. The first end of the transistor M25 and the control end jointly receive 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 status signal GOFF.

FIG. 6 is a timing diagram illustrating the display device 500 shown in FIG. 5 according to yet another embodiment of the present invention. Please refer to FIG. 5 and FIG. 6. In this embodiment, when the display device 500 operates in the display time interval T1, the transistors M21, M23, and M25 of the switching circuit 520 can be set to enable states (for example, high voltage Potential) display state signal TPSW is turned on, and these transistors M21, M23, M25 can receive the display state signal TPSW, so that the display state signal TPSW with a high voltage potential is used as the detection control signal TCS11 ~ TCS13, and provided to the detection Transistors M41 to M43 of the signal selection circuit 540 . Moreover, the display device 500 can respectively perform inverse actions on the detection control signals TCS11 - TCS13 through the inverters INV1 - INV3 , so as to provide the detection control signals TCS14 - TCS16 to the transistors M44 - M46 correspondingly. In this way, the display device 500 can avoid floating or malfunctioning of the detection signal selection circuit 540 when displaying the time interval T1 without receiving the voltage level signal FVS.

In contrast, when the display device 500 is operating in the detection time interval T2, the transistors M11, M13, and M15 of the switch circuit 510 can be turned on according to the detection state signal GOFF which is set to an enabled state (for example, a high voltage level). , and these transistors M11 , M13 , M15 can receive the display state signal TPSW to provide the display state signal TPSW with a low voltage level as the data control signals DCS1 - DCS3 to the data signal selection circuit 530 . In this way, the display device 500 can avoid floating or malfunctioning of the data signal selection circuit 530 when detecting the time interval T2 without receiving the voltage level signal FVS.

It should be noted that in the display time interval T1 and the detection time interval T2, 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 of the display device 500 The details of the operation of the 560 can be analogized by referring to the relevant 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. Let me repeat.

To sum up, the data signal selection circuit and the detection signal selection circuit of the display device of the present invention can be jointly coupled to the same control line through respective switching circuits to receive the same control signal. In this way, the display device of the present invention can simultaneously control the operation of the data signal selection circuit and the detection signal selection circuit only through these control signals, thereby effectively reducing the number of pins and the overall cost of the display device.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

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 as claimed in 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 and provides the data control signals to the data signal selecting circuit during the display time interval, 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 and provides the detection control signals to the detection signal selecting circuit during the detection time interval.

3. The display device of claim 1, wherein the first switching circuit and the second switching circuit receive a voltage potential 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 as the detection control signals according to the display status signal and the detection status 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 of 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 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 as claimed in claim 1, wherein the control signals comprise 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 terminal and the control terminal of which commonly 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 as claimed in claim 3, wherein the control signals comprise 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, wherein the first terminal of the third transistor receives the voltage potential signal and the control terminal of the third transistor receives 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 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.

9. The display device according to 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, wherein a first terminal of the first transistor is coupled to the detection circuit, a second terminal of the first transistor is coupled to the touch panel, and a control terminal of the first transistor is 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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