TWI686733B - Touch display device - Google Patents

Abstract

A touch display device includes a plurality of data lines, a plurality of switch modules, a plurality of electrodes, a plurality of second switches and a control circuit. Each switch module includes a number of N-1 first switches. Each first switch is used to control an electrical connection between a first data line among a number of N data lines connected to the switch module and one of the other N-1data lines. The electrodes are arranged in a matrix. Each second switch is used to control an electrical connection between the first data line and the electrode which the second switch connected to. In a display period of each frame, the control circuit outputs a plurality of data signals to the data lines corresponding to the data signals and disables the second switches. In a touch period of the each frame, the control circuit enables at least one second switch so as to receive a touch signal sensed by the electrode through the first data line which the conducted second switch connected to.

Description

Touch display device

The invention relates to touch technology, in particular to a touch display device.

With the continuous optimization of human-machine interfaces, touch interface operation has become a trend around the world. In recent years, some manufacturers have integrated touch functions into display devices so that the display devices can have both touch and display functions. The display device with both touch functions can be generally called a touch display device.

In one embodiment, a touch display device includes a plurality of data lines, a plurality of switch modules, a plurality of electrode blocks, a plurality of second switches, and a control circuit. Each switch module is coupled to N data lines adjacent in sequence. Each switch module includes N-1 first switches. Each first switch is used to control the electrical connection between the first data line of the N data lines coupled to the switch module to which it belongs and one of the other N-1 data lines. Each second switch is coupled to one of the first data lines and one of the electrode blocks. Each second switch is used to control the electrical connection between the coupled first data line and the electrode block. During at least one display period in each frame, the control circuit is used to output a plurality of data signals through the first data lines to the data lines corresponding to the data signals, and disable the second switches. During at least one touch period in each frame, the control circuit turns on at least one second switch to receive the touch signal sensed by the electrode block through the first data line coupled to the turned-on at least one second switch. Wherein, N is a positive integer and greater than or equal to 2, and each electrode block is coupled to at least one second switch.

In summary, the touch display device according to the embodiment of the invention receives the touch signal during the touch through the first data line and outputs the data signal during the display through the first data line, which can be greatly reduced The number of output ports required by the control circuit. In addition, the at least one second switch coupled to each electrode block realizes the synchronous detection of the touch signal or the detection of the partition.

The following describes in detail the detailed features and advantages of the present invention in the embodiments. The content is sufficient for any person skilled in the relevant art to understand and implement the technical content of the present invention, and according to the contents disclosed in this specification, the scope of patent application and the drawings Anyone skilled in the relevant art can easily understand the purpose and advantages of the present invention.

FIG. 1 is a schematic diagram of an embodiment of a touch display device, and FIG. 2 is a schematic diagram of an embodiment of a touch display device. 1 and 2, the touch display device 100 includes a plurality of data lines D1-D18, a plurality of switch modules M1-M6, a plurality of electrode blocks E11-E23, a plurality of second switches T2, and a control circuit 110. In addition, the touch display device 100 may further include a plurality of scanning lines G1-G6 and a plurality of pixel units Ua1-Ur6. Here, in order to clearly illustrate the setting of the second switch T2 in FIG. 1, the pixel units Ua1-Ur6 and the scanning lines G1-G6 are not depicted. In order to clearly show the relationship between the pixel units Ua1-Ur6 and the data lines D1-D18 and scan lines G1-G6 in FIG. 2, the second switch T2 is not shown, and the electrode blocks E11-E23 are changed. It is shown in dotted lines. Therefore, FIG. 1 and FIG. 2 can be referred to each other.

The plural pixel units Ua1-Ur6 are arranged in an array form a pixel array. Each pixel unit Ua1-Ur6 is coupled to the corresponding scan line G1-G6 and the corresponding data line D1-D18 to receive the data signal on the corresponding data line D1-D18 according to the driving of the corresponding scan line G1-G6 . In some embodiments, the touch display device 100 has a visible area AA, and the visible area AA is generally the area where the pixel units Ua1-Ur6 are located.

Each switch module M1-M6 can be coupled to N data lines adjacent in sequence. Among them, N is a positive integer and greater than or equal to 2. In the following, this case is illustrated and described with N equal to 3 as an example, but this case is not limited to this. When N is equal to 3, each switch module M1-M6 can be coupled to three adjacent data lines in sequence. For example, the switch module M1 may be coupled to the data lines D1-D3. The switch module M2 can be coupled to the data lines D4-D6. By analogy, the switch module M6 can be coupled to the data lines D16-D18.

Each switch module M1-M6 may include N-1 first switches. Each first switch in each switch module M1-M6 is coupled to one of the N data lines to which the switch modules M1-M6 are coupled (hereinafter referred to as the first data line) It is connected to one of the other N-1 data lines and is used to control the electrical connection between the first data line and one of the N-1 data lines. Here, although the switch modules M1-M6 are shown above the viewable area AA, the placement positions thereof are not limited to this. In some embodiments, the switch modules M1-M6 may also be placed below the viewable area AA .

For example, when N is equal to 3, each switch module M1-M6 may include two first switches T11-T12. Taking the switch module M1 as an example, if the switch module M1 uses the third data line D3 among the three data lines D1-D3 coupled as the first data line L11, the switch module M1 The first switch T11 may be coupled between the data line D3 and the data line D1, and used to establish or disconnect the electrical connection between the data line D3 and the data line D1 according to the received control signal S1. The first switch T12 of the switch module M1 is coupled between the data line D3 and the data line D2, and is used to establish or disconnect the electrical connection between the data line D3 and the data line D2 according to the received control signal S2 .

In an embodiment, when the switch module M1 uses the c-th data line of the N data lines coupled as the first data line, the remaining switch modules M2-M6 are also coupled Among the N data lines, the c-th data line serves as the first data line. Where c is a positive integer and less than or equal to N. For example, when c is equal to 3, when the switch module M1 uses the third data line D3 coupled as the first data line L11, the switch module M2 will also use the third coupled line A data line D6 serves as the first data line L12. By analogy to the switch module M6, the switch module M6 will use the third data line D18 coupled to it as the first data line L16. However, this case is not limited to this, and each of the switch modules M1-M6 may also use any one of the N data lines to which it is coupled as the first data line.

In some embodiments, the first switch T11 of each switch module M1-M6 is controlled by the same control signal S1, and the first switch T12 of each switch module M1-M6 is controlled by the same another control Signal S2. In other words, the first switch T11 of each switch module M1-M6 can operate synchronously according to the control signal S1. Similarly, the first switch T12 of each switch module M1-M6 can operate synchronously according to the control signal S2.

The electrode blocks E11-E23 are spaced from each other and are arranged in an array. In one embodiment, the projection of each electrode block E11-E23 on the pixel array can cover approximately 18 pixel units (that is, the product of two rows and three straight rows), but this case is not limited to this. The size of each electrode block E11-E23 is determined by design requirements.

Each second switch T2 is coupled to one of the first data lines L11-L16 and one of the electrode blocks E11-E23 to establish or disconnect the first data line to which it is coupled Electrical connection with electrode block. Wherein, each electrode block E11-E23 may be coupled to at least one second switch T2. In other words, there may be multiple second switches T2 all coupled to the same electrode block. Here, the plurality of second switches T2 coupled to the same electrode block will be controlled by the same control signal to be turned on or disabled together.

The control circuit 110 is coupled to the first data lines L11-L16 to receive or output signals through the first data lines L11-L16. Moreover, the control circuit 110 can be coupled to the switch modules M1-M6 to control the first data lines L11-L16 and others by turning on or off the first switches T11-T2 in the switch modules M1-M6. Electrical connection between data lines.

The touch display device 100 has a plurality of frames of operation periods. The operation period of each frame may include one or more display periods and one or more touch periods. In the following, a frame includes two display periods td1-td2 and two touch periods tt1-tt2 as an example for description. Moreover, the two display periods td1-td2 and the two touch periods tt1-tt2 are alternately arranged with each other.

FIG. 3 is a schematic waveform diagram of an embodiment of a touch display device during a touch period and a display period, and FIG. 4 is a schematic waveform diagram of an embodiment of the touch display device during another touch period and another display period. 5 is a schematic diagram of an embodiment of a touch display device during a touch period. Please refer to FIGS. 3 to 5. During each touch period tt1-tt2, the control circuit 110 may turn on at least one second switch T2 to receive the sensed electrode block through the first data line coupled to the turned-on second switch T2 The measured touch signals S41-S46.

In some embodiments, the touch display device 100 further includes a plurality of control lines L21-L22. The control end of each second switch T2 is coupled to one of the control lines L21-L22, and the first data can be established or disconnected according to the control signals S31-S32 on the control lines L21-L22 The electrical connection between the lines L11-L16 and the electrode blocks E11-E23.

In some embodiments, the control terminal of the second switch T2 coupled to the electrode blocks in the same row can be coupled to the same control line. For example, as shown in FIG. 1, the control terminals of the second switches T2 coupled to the electrode blocks E11-E13 in the first row can be coupled to the control line L21. The control terminals of the second switches T2 coupled to the electrode blocks E21-E23 in the second straight row can be coupled to the control line L22.

In this way, during each touch period tt1-tt2, the control circuit 110 may sequentially output the control signals S31-S32 to one of the control lines L21-L22 to sequentially turn on the second coupled to the control line The switch T2 is used to achieve the zone-sensing touch signals S41-S46. For example, in each touch period tt1-tt2, the control circuit 110 may first output the control signal S31 to the control line L21 to turn on each second switch T2 coupled to the control line L21 to establish its first coupled The electrical connection between the data lines L11-L13 and the electrode blocks E11-E13, and then the control circuit 110 can receive the touch signals S41-S43 sensed by the electrode blocks E11-E13 via the first data lines L11-L13 . Then, the control circuit 110 does not output the control signal S31 to the control line L21 to disable the second switch T2 coupled thereto, and instead outputs the control signal S32 to the control line L22, to turn on each of the first switches coupled to the control line L22 Two switches T2 are used to establish the electrical connection between the coupled first data lines L14-L16 and the electrode blocks E21-E23, and then the control circuit 110 can receive the electrode block E21- through these first data lines L14-L16. The touch signals S44-S46 sensed by E23. Here, it should be noted that the output sequence and duty cycle of these control signals S31-S32 can be designed by themselves.

6 is a schematic diagram of another connection method of the second switch in FIG. 1. Please refer to FIG. 6. In some other embodiments, the control terminal of the second switch T2 coupled to the electrode block in the same row can also be coupled to the same control line. For example, as shown in FIG. 6, the control terminals of the second switch T2 coupled to the electrode blocks E11-E21 located in the first row can be coupled to the control line L21. The control terminals of the second switch T2 coupled to the electrode blocks E12-E22 in the second row can be coupled to the control line L22. Moreover, the control terminal of the second switch T2 coupled to the electrode blocks E13-E23 in the last row can be coupled to the control line L23.

Similarly, in each touch period tt1-tt2, the control circuit 110 may sequentially output control signals S31-S33 to one of the control lines L21-L23 to sequentially turn on the second switch coupled to the control line T2, so as to achieve the zone sensing touch signals S41-S46. Here, since the control method of the zone-sensing touch signals S41-S46 of the control circuit 110 is substantially the same as the above, it will not be repeated here.

7 is a schematic diagram of a waveform of a touch display device performing synchronous sensing during touch. Please refer to FIG. 1 to FIG. 7. In some embodiments, the control circuit 110 can also synchronously output the control signals S31-S32 to the control lines L21-L22 during each touch period tt1-tt2, so as to be synchronously turned on and coupled to The second switches T2 on the control lines L22-L22 enable the control circuit 110 to receive the touch signals S41-S46 sensed by the electrode blocks E11-E23 via the first data lines L11-L16 to achieve a sense of synchronization Test touch signals S41-S46.

In some embodiments, the touch display device 100 further includes a gate driving circuit 120. The gate driving circuit 120 can be coupled to the control lines L21-L22 to output the control signals S31-S32 to the control lines L21-L22. In addition, the gate driving circuit 120 can be further coupled to the scanning lines G1-G6 to output the driving signals Sg1-Sg6 to the scanning lines G1-G6.

8 is a schematic diagram of an embodiment of the touch display device during the display period in FIG. 3, and FIG. 9 is a schematic diagram of the embodiment of the touch display device during the display period of FIG. Please refer to FIG. 3, FIG. 4, FIG. 8 and FIG. 9, in each display period td1-d2, the gate driving circuit 120 can sequentially output the driving signals Sg1-Sg6 to some of the scanning lines G1-G6. In addition, the gate driving circuit 120 sequentially outputs driving signals through different portions of the scanning lines during the display period td1 and the display period td2. For example, during the display period td1, the gate driving circuit 120 may sequentially output the driving signals Sg1-Sg3 via the scanning lines G1-G3. In the next display period td2, the gate driving circuit 120 sequentially outputs the driving signals Sg4-Sg6 via the scanning lines G4-G6.

During each display period td1-td2, the control circuit 110 may disable the second switch T2 through the gate driving circuit 120 to disconnect the electrical connection between the first data lines L11-L16 and the electrode blocks E11-E23. Moreover, the control circuit 110 can output the complex data signals Sd1-Sd6 through the complex first data lines L11-L6 during the on-time of each driving signal Sg1-Sg6.

In some embodiments, each data signal Sd1-Sd6 may correspond to one of the pixel units Ua1-Ur6, respectively. In addition, the control circuit 110 can sequentially turn on the corresponding switches in the switch modules M1-M6 according to the data lines to which the pixel units corresponding to the data signals Sd1-Sd6 are coupled in the turn-on time of the drive signals Sg1-Sg6. The first switches T11-T12 to establish an electrical connection between each first data line L11-L16 and the data line coupled to the pixel unit corresponding to each data signal Sd1-Sd6, so as to correspond to each data signal Each pixel unit of Sd1-Sd6 receives the corresponding data signal Sd1-Sd6.

For example, during the on-time of the driving signal Sg1, when the data signals Sd1-Sd6 output by the control circuit 110 correspond to the pixel units Ua1 coupled to the data lines D1, D4, D7, D10, D13, and D16 , Ud1, Ug1, Uj1, Um1, Up1, the control circuit 110 can turn on the first switch T11 of each switch module M1-M6 through the control signal S1, and disable the first switch T11 of each switch module M1-M6 through the control signal S2 A switch T12, so that each data signal Sd1-Sd6 can be transmitted to each pixel unit Ua1 via the electrical connection between each first data line L11-L16 and the data lines D1, D4, D7, D10, D13, D16 Ud1, Ug1, Uj1, Um1, Up1. After that, when the data signals Sd1-Sd6 output by the control circuit 110 are corresponding to the pixel units Ub1, Ue1, Uh1, Uk1, Un1, Uq1 coupled to the data lines D2, D5, D8, D11, D14, D17 The control circuit 110 can disable the first switch T11 of each switch module M1-M6 through the control signal S1, and turn on the first switch T12 of each switch module M1-M6 through the control signal S2, so that each data signal Sd1- Sd6 can be transmitted to each pixel unit Ub1, Ue1, Uh1, Uk1, Un1, Uq1 via the electrical connection between each first data line L11-L16 and the data lines D2, D5, D8, D11, D14, D17. Finally, when the data signals Sd1-Sd6 output by the control circuit 110 are corresponding to the pixel units Uc1, Uf1, Ui1, Ul1, Uo1, Ur1 coupled to the data lines D3, D6, D9, D12, D15, D18 , The control circuit 110 disables the first switch T11 of each switch module M1-M6 through the control signal S1, and disables the first switch T12 of each switch module M1-M6 through the control signal S2, so that each data signal Sd1 -Sd6 can be directly transmitted to each pixel unit Uc1, Uf1, Ui1, Ul1, Uo1, Ur1 via each first data line L11-L16. Similarly, during the on-time of other driving signals Sg2-Sg6, the control circuit 110 can control each switch module M1-M6 in this way to output corresponding data signals Sd1-Sd6 to each through the first data lines L11-L16 Pixel units Ua1-Ur6.

Therefore, in this case, the control circuit 110 outputs/receives touch signals through the first data lines L11-L16, and outputs data signals Sd1-Sd6. In this way, the number of output ports required by the control circuit 110 can be greatly reduced.

10 is a schematic diagram of an embodiment of a touch display device using an electrode block as a common electrode, and FIG. 11 is a schematic diagram of another embodiment of a touch display device using an electrode block as a common electrode. Please refer to FIGS. 1-11. In some embodiments, the electrode blocks E11-E23 are used as sensing electrodes for detecting touch signals during the touch period tt1-tt2, and the electrode blocks E11-E23 are displayed during Td1-td2 can also be used as a common electrode. Therefore, during the display period td1-td2, the electrode blocks E11-E23 are more electrically connected to a common signal line COM, and the common signal line COM can output a common voltage during the display period td1-td2, so that the electrode block E11 -E23 and the pixel units Ua1-Ur6 together can form the electric field required for display.

In some embodiments, the touch display device 100 further includes a plurality of third switches T3, and each third switch T3 may be coupled between one of the electrode blocks E11-E23 and the common signal line COM, and used to establish Or disconnect the electrical connection between the coupled electrode blocks E11-E23 and the common signal line COM, the gate drive circuit 120 turns on these third switches T3 during the display period td1-td2, so that the electrode block E11- E23 can be electrically connected to the common signal line COM, as shown in Figure 10.

In other embodiments, the touch display device 100 further includes a plurality of third switches T3 and fourth switches T4. Each third switch T3 is coupled between one of the data lines other than the first data lines L11-L16 and the common signal line COM to establish or disconnect the coupled data line and the common signal line COM Electrical connection. Each fourth switch T4 is coupled to one of the data lines other than the first data lines L11-L16 and one of the electrode blocks E11-E23 to establish or disconnect the coupled data lines and electrodes The electrical connection between blocks E11-E23. The data line coupled to the fourth switch T4 must be coupled to the third switch T3, and the third switch T3 and the fourth switch T4 coupled to the same data line can be synchronously turned on or disabled. Here, the control terminal of each third switch T3 and the control terminal of each fourth switch T4 can be coupled to the gate driving circuit 120 and controlled by the gate driving circuit 120.

In some embodiments, each electrode block E11-E23 may be coupled to at least two fourth switches T4, so that when one of the fourth switches T4 is disabled, each electrode block E11-E23 may pass through at least another The data line coupled by the four switches T4 is electrically connected to the common signal line COM. In the following, an example will be described in which each electrode block E11-E2 is coupled to two fourth switches T4.

In an example, please refer to FIG. 11, in order to clearly illustrate the arrangement of the third switch T3 and the fourth switch T4, the pixel units Ua1-Ur6, the scan lines G1-G6 and the second switch T2 are not shown. Here, two fourth switches T4 coupled to the electrode block E11 at one end, two fourth switches T4 coupled to the electrode block E12 at one end and two fourth switches T4 coupled to the electrode block E13 at the other end It can be coupled to the data lines D4 and D5 respectively. Moreover, the two third switches T3 are respectively coupled to the data lines D4 and D5. The two fourth switches T4 coupled to the electrode block E21 at one end, the two fourth switches T4 coupled to the electrode block E22 at one end and the two fourth switches T4 coupled to the electrode block E23 at the other end may be respectively Coupling to the data lines D13, D14. Moreover, the two third switches T3 are respectively coupled to the data lines D13 and D14. Therefore, in each display period td1-d2, the gate driving circuit 120 can be conductively coupled according to which data line the data signals Sd1-Sd6 output by the control circuit 110 via the first data lines L11-L16 are transmitted to The third switch T3 and the fourth switch T4 of the data lines that have not received (not corresponding to) the data signals Sd1-Sd6, so that each electrode block E11-E23 can electrically pass the data lines of the unreceived data signals Sd1-Sd6 Connected to the common signal line COM and used as a common electrode.

For example, during the on-time of the driving signal Sg1, when the data signals Sd1-Sd6 output by the control circuit 110 correspond to the pixel units Ua1 coupled to the data lines D1, D4, D7, D10, D13, and D16 , Ud1, Ug1, Uj1, Um1, Up1, the gate drive circuit 120 can turn on the third switch T3 and the fourth switch T4 coupled to the data line D5 and the third switch T3 and the fourth switch coupled to the data line D14 Switch T4, so that each data signal Sd1-Sd6 is transmitted to each pixel unit Ua1, Ud1 through the electrical connection between each first data line L11-L16 and the data line D1, D4, D7, D10, D13, D16 , Ug1, Uj1, Um1, Up1, the electrode blocks E11-E23 can be electrically connected to the common signal line COM via the data lines D5, D14 that have not received the data signals Sd1-Sd6. Then, when the data signals Sd1-Sd6 output by the control circuit 110 correspond to the pixel units Ub1, Ue1, Uh1, Uk1, Un1, Uq1 coupled to the data lines D2, D5, D8, D11, D14, D17 , The gate driving circuit 120 can turn on the third switch T3 and the fourth switch T4 coupled to the data line D4 and the third switch T3 and the fourth switch T4 coupled to the data line D13, so that each data signal Sd1-Sd6 When the electrical connection between each first data line L11-L16 and the data lines D2, D5, D8, D11, D14, D17 is transmitted to each pixel unit Ub1, Ue1, Uh1, Uk1, Un1, Uq1, the electrode The blocks E11-E23 can be electrically connected to the common signal line COM via the data lines D4, D13 that have not received the data signals Sd1-Sd6. Finally, when the data signals Sd1-Sd6 output by the control circuit 110 are corresponding to the pixel units Uc1, Uf1, Ui1, Ul1, Uo1, Ur1 coupled to the data lines D3, D6, D9, D12, D15, D18 , The gate driving circuit 120 can selectively turn on the third switch T3 and the fourth switch T4 coupled to the data line D4 and the third switch T3 and the fourth switch T4 coupled to the data line D13, so that each data signal Sd1- When Sd6 is output to each pixel unit Uc1, Uf1, Ui1, Ul1, Uo1, Ur1 via each first data line L11-L16, the electrode blocks E11-E23 can only pass through the data line D4 that has not received the data signal Sd1-Sd6 , D13, D16 are electrically connected to the common signal line COM. However, this case is not limited to this. The gate driving circuit 120 can also selectively turn on the third switch T3 and the fourth switch T4 coupled to the data line D5 and the third switch T3 and the fourth switch T4 coupled to the data line D14 Or, therefore, neither of the two data lines D4, D13 receives the data signals Sd1-Sd6 and turns on all the third switches T3 and the fourth switches T4.

Similarly, during the on-times of the other driving signals Sg2-Sg6, the gate driving circuit 120 can control each of the third switch T3 and the fourth switch T4 according to any of the aforementioned methods.

In some embodiments, the second switch T2, the third switch T3, and the fourth switch T4 may be disposed in the viewing area AA. However, this case is not limited to this. In other implementations, the third switch T3 can be directly integrated into the gate driving circuit 120.

12 is a schematic side view of an embodiment of a touch display device. Please refer to FIGS. 1-12. In some embodiments, the touch display device 100 may further include an array substrate 130 and a counter substrate 140. The counter substrate 140 is disposed relative to the array substrate 130. The data lines D1-D18 and the scanning lines G1-G6 are disposed on the array substrate 130. The data lines D1-D18 are interleaved with the scanning lines G1-G6, and together with the scanning lines G1-G6 form a plurality of pixel regions. The complex pixel units Ua1-Ur6 are respectively arranged in a pixel area. In addition, a plurality of electrode blocks E11-E23 are located between the array substrate 130 and the counter substrate 140.

In some embodiments, the data lines D1-D18 may be arranged on the array substrate 130 along the first direction, and the scan lines G1-G6 may be arranged on the array substrate 130 along the second direction orthogonal to the first direction. Each pixel unit Ua1-Ur6 includes an active element and a pixel electrode. In addition, the plurality of electrode blocks E11-E23 may be disposed on the side of the counter substrate 140, as shown in FIG. But this case is not limited. 13 is a schematic side view of another embodiment of a touch display device. Referring to FIG. 13, the plural electrode blocks E11-E23 can also be disposed on the side of the array substrate 130. However, at this time, an insulating layer 150 may be further provided between the plurality of electrode blocks E11-E23 and the pixel units Ua1-Ur6 to separate the pixel electrodes of the electrode blocks E11-E23 and the pixel units Ua1-Ur6.

In some embodiments, the electrode blocks E11-E23 are light-transmitting conductive films. In addition, the material of the electrode blocks E11-E23 can be selected from the group consisting of indium tin oxide (ITO).

In some embodiments, the gate driving circuit 120 can be directly fabricated on the array substrate 130 through GOA (Gate On Array) technology. In addition, the gate driving circuit 120 can also be composed of two gate driving units, and one of the gate driving units can be used to control the odd-numbered scan lines G1, G3, and G5, respectively, while the other gate driving unit is It is used to control the scan lines G2, G4, G6 which are evenly arranged.

In some embodiments, the switch modules M1-M6 can be a multiplexer (MUX).

In some embodiments, the control circuit 110 may be implemented using integrated touch and driver chip (TDDI).

In summary, the touch display device according to the embodiment of the invention receives the touch signal during the touch through the first data line and outputs the data signal during the display through the first data line, which can be greatly reduced The number of output ports required by the control circuit. In addition, the at least one second switch coupled to each electrode block realizes the synchronous detection of the touch signal or the detection of the partition.

Although the technical content of the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this art and makes some changes and retouching without departing from the spirit of the present invention should be covered in the present invention. The scope of protection of the present invention shall be subject to the scope of the attached patent application.

100: touch display device

110: control circuit

120: Gate drive circuit

130: Array substrate

140: counter substrate

150: insulating layer

D1-D18: data cable

G1-G6: Scan line

M1-M6: switch module

E11-E23: Electrode block

T11-T12: the first switch

T2: second switch

T3: third switch

Ua1-Ur6: pixel unit

L11-L16: the first data line

S1-S2: control signal

S31-S33: control signal

Sg1-Sg6: drive signal

td1-td2: during display

tt1-tt2: During touch

S41-S46: Touch signal

Sd1-Sd6: data signal

COM: shared signal line

AA: viewable area

L21-L23: control line

T4: fourth switch

FIG. 1 is a schematic diagram of an embodiment of a touch display device. FIG. 2 is a schematic diagram of an embodiment of a touch display device. FIG. 3 is a schematic diagram of waveforms of an embodiment of a touch display device during a touch period and a display period. FIG. 4 is a schematic waveform diagram of an embodiment of a touch display device during another touch period and another display period. 5 is a schematic diagram of an embodiment of a touch display device during a touch period. 6 is a schematic diagram of another connection method of the second switch in FIG. 1. 7 is a schematic diagram of a waveform of a touch display device performing synchronous sensing during touch. FIG. 8 is a schematic diagram of an embodiment of the touch display device during the display period in FIG. 3. 9 is a schematic diagram of an embodiment of the touch display device during the display period in FIG. 4. 10 is a schematic diagram of an embodiment of a touch display device using an electrode block as a common electrode. 11 is a schematic diagram of another embodiment of a touch display device using an electrode block as a common electrode. 12 is a schematic side view of an embodiment of a touch display device. 13 is a schematic side view of another embodiment of a touch display device.

100: touch display device

110: control circuit

120: Gate drive circuit

L21-L22: control line

D1-D18: data cable

G1-G6: Scan line

M1-M6: switch module

E11-E23: Electrode block

T11-T12: the first switch

T2: second switch

L11-L16: the first data line

S1-S2: control signal

S31-S32: control signal

AA: viewable area

Claims (10)

A touch display device, comprising: a plurality of data lines; a plurality of switch modules, each of the switch modules is coupled to N adjacent data lines in sequence, each of the switch modules includes N-1 first switches, and Each of the first switches is used to control whether the first data line among the N data lines coupled to the switch module is electrically connected to one of the other N-1 data lines, Where N is a positive integer and greater than or equal to 2; a plurality of electrode blocks arranged in an array; a plurality of second switches, each of the second switches is coupled to one of the first data lines and one of the electrode blocks , And used to control the electrical connection between the coupled first data line and the electrode block, wherein each electrode block is coupled to at least one second switch; and a control circuit, at each frame At least one of the display periods outputs a plurality of data signals to the data lines corresponding to the data signals through the first data lines, and disables the second switches and at least one touch in each of the frames During the control period, at least one second switch is turned on to receive a touch signal sensed by the electrode block through the first data line coupled to the turned on at least one second switch. The touch display device according to claim 1, further comprising a plurality of control lines, the control end of each second switch is coupled to one of the control lines, and is coupled to the electrodes in the same row The second open relationships of the blocks are coupled to the same control line. The touch display device according to claim 1, further comprising a plurality of control lines, the control end of each second switch is coupled to one of the control lines, and is coupled to the ones in the same row The second open relationships of the electrode blocks are coupled to the same control line. The touch display device according to any one of claims 2 or 3, wherein the control circuit is sequentially coupled and coupled through one of the control lines during the at least one touch period in each frame The second switches on the control line. The touch display device according to any one of claims 2 or 3, wherein the control circuit synchronously turns on the second switches via the control lines during the at least one touch period in each frame. The touch display device according to claim 1, wherein the second switches are located in the visible area of the touch display device. The touch display device according to claim 1, further comprising: a plurality of third switches, each of the third switches is coupled between one of the electrode blocks and a common signal, and is used to control the coupled Whether there is an electrical connection between the electrode block and the common signal, wherein each electrode block is coupled to at least one of the third switch; and a gate drive circuit, which is turned on during the at least one display period in each of the frames These third switches. The touch display device according to claim 7, wherein the third switches are located in the visible area of the touch display device. The touch display device according to claim 7, wherein the third switches are integrated in the gate driving circuit. The touch display device according to claim 1, further comprising: a plurality of third switches, each of the third switches is coupled between one of the data lines other than the first data line and a common signal, And used to control the electrical connection between the coupled data line and the shared signal; a plurality of fourth switches, each of the fourth switches is coupled to the data lines that are not the first data line Between one of the electrode blocks and used to control the electrical connection between the coupled data line and the electrode block; and a gate drive circuit in each of the frames During a display period, the gate drive circuit turns on the third switch and the fourth switch coupled to the data line that does not correspond to the data signal according to which data line the data signal corresponds to.

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