TW202101182A - Touch display device - Google Patents

Abstract

A touch display device includes a processing unit, a display panel, and a switch circuit. The processing unit includes a first bump. The first bump is electrically connected to a first data line and a detection line. The processing unit transmits a first data signal through the first bump and the first data line, and transmits a first detection signal through the first bump and the detection line. The display panel includes a first pixel circuit and a touch unit. The first pixel circuit receives the first data signal through the first data line. The touch unit receives the first detection signal through the detection line. The switch circuit is electrically connected to the first bump and the detection line. The switch circuit is configured to conduct the first bump to the detection line according to a control signal.

Description

Touch display device

The present disclosure relates to a touch display device, in particular, it transmits data signals to a pixel circuit and a detection signal to a touch unit to realize the functions of display pixels and touch detection.

With the rapid development of display technology, display panels are widely used in people's daily lives and play an increasingly important role. For example, the display panel can be used in various electronic devices such as televisions, computers, mobile phones, etc., to present various information.

Generally speaking, the display panel will provide the corresponding data voltage to the internal pixel circuit according to the image signal, and then present the expected brightness or color. In addition, the display panel can also be provided with a touch circuit to detect the user's touch action to have the function of an input device. How to integrate or control the pixel circuit and the touch circuit will directly affect the quality of the display panel.

One aspect of the present disclosure is a touch display device. The touch display device includes a processing unit, a display panel, and a switch circuit. The processing unit includes a first pin. The first pin is electrically connected to the first data line and The measuring line enables the processing unit to transmit the first data signal through the first pin and the first data line, and transmits the first detection signal through the first pin and the detection line. The display panel includes a first pixel circuit and a touch unit. The first pixel circuit is electrically connected to the first data line for receiving the first data signal. The touch unit is electrically connected to the detection line for receiving the first detection signal. The switch circuit is electrically connected to the first pin and the detection line, and conducts the first pin to the detection line according to the control signal.

The present disclosure transmits the data signal and the detection signal to the data line and the detection line through the same pin, so the processing unit can be configured with fewer pins, smoothly drive the display panel, and enable the display panel to perform the touch detection function.

100‧‧‧Touch display device

110‧‧‧Processing unit

110A‧‧‧Front-end circuit

120‧‧‧Display Panel

121A‧‧‧Pixel circuit

121B‧‧‧Pixel circuit

121C‧‧‧Pixel circuit

121D‧‧‧Pixel circuit

122A‧‧‧touch unit

122B‧‧‧Touch Unit

122(n-1)‧‧‧Touch unit

122n‧‧‧touch unit

123‧‧‧Power supply circuit

130A~130E‧‧‧Switching circuit

130X‧‧‧Switch circuit

130Y‧‧‧Switch circuit

130G1~130G3‧‧‧Switch circuit group

B1~Bn‧‧‧pin

DL1~DL9‧‧‧Data line

TP1~TP5‧‧‧Detection line

TPX‧‧‧Test line

TPY‧‧‧Test line

TPY1‧‧‧Drive line

TPY2‧‧‧Drive line

CL‧‧‧Control line

CL1~CL3‧‧‧Control line

Sd1‧‧‧First data signal

Sd2‧‧‧Second data signal

St1‧‧‧Detection signal

Vt‧‧‧Operating voltage

Vcom‧‧‧electrode voltage

T1‧‧‧First switch unit

T2‧‧‧Second switch unit

TR1‧‧‧Switch impedance

TR2‧‧‧Switch impedance

G1‧‧‧First detection area

G2‧‧‧Second detection area

G3‧‧‧Third detection area

Sc‧‧‧Control signal

Sc1‧‧‧Control signal

Sc2‧‧‧Control signal

Sc3‧‧‧Control signal

SG1~SG3‧‧‧Signal

P1‧‧‧Display period

P2‧‧‧Detection cycle

FA‧‧‧Fan-out area

FIG. 1 is a schematic diagram of a touch display device according to some embodiments of the present disclosure.

FIG. 2 is a partial schematic diagram of a touch display device according to some embodiments of the present disclosure.

FIG. 3 is an equivalent schematic diagram of a switch circuit according to some embodiments of the present disclosure.

FIG. 4 is a schematic diagram of a touch display device according to some embodiments of the present disclosure.

FIG. 5 is a signal waveform diagram of the touch display device according to some embodiments of the present disclosure.

Figure 6 is a touch display according to some embodiments of the present disclosure Show a partial schematic diagram of the device.

FIG. 7 is a schematic diagram of a touch display device according to some embodiments of the present disclosure.

Hereinafter, multiple implementations of this case will be disclosed in schematic form. For the sake of clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit the case. In other words, in some implementations of the present disclosure, these practical details are unnecessary. In addition, in order to simplify the drawings, some conventionally used structures and elements will be shown in a simple schematic manner in the drawings.

In this text, when a component is referred to as “connected” or “coupled”, it can be referred to as “electrically connected” or “electrically coupled”. "Connected" or "coupled" can also be used to mean that two or more components cooperate or interact with each other. In addition, although terms such as “first”, “second”, etc. are used herein to describe different elements, the terms are only used to distinguish elements or operations described in the same technical terms. Unless clearly indicated by the context, the terms do not specifically refer to or imply order or sequence, nor are they used to limit the present invention.

Please refer to FIG. 1, which is a schematic diagram of a touch display device 100 according to some embodiments of the present disclosure. At present, the touch circuit can be divided into external type "out-cell" and in-cell type according to the structure, and the in-cell type includes two kinds of "in-cell" and "on-cell". In some embodiments, the touch display device 100 is applied as an “in-cell” touch structure, but it is not limited to this.

As shown in FIG. 1, the touch display device 100 includes a processing unit 110, a display panel 120, and switch circuits 130A to 130E. The processing unit 110 may be a processor or an arithmetic circuit in the touch display device 100 for generating data signals and detection signals so that the display panel 120 can perform functions such as display and touch detection. In the drawings, only the positions of the components on the display panel 120 are drawn in a focused manner. Since the detailed features of the circuits and components in the display panel 120 are understood by those in the art, they are omitted here.

In some embodiments, the processing unit 110 is located above the switching circuits 130A to 130E, and is therefore represented by a dashed line. That is, after the switch circuits 130A to 130E are disposed in the non-display area of the touch display device 100, the processing unit 110 is disposed on the non-display area, so that the processing unit 110 and the switch circuits 130A to 130E are overlapped and disposed in the touch Control the same area in the display device 100. However, in some other embodiments, the switch circuit 130 can also be disposed in the fan out area FA of the touch display device 100.

The display panel 120 includes a plurality of pixel circuits 121A~121D and a plurality of touch units 122A, 122B...122(n-1), 122n, of which the pixel circuits 121A~121D and touch units 122A, 122B...122(n- 1) 122n is located in the display area (Active Area) of the touch display device 100. The processing unit 110 includes a plurality of pins B1 to B10 for outputting various signals generated by the processing unit 110. The pins B1 to B10 are electrically connected to a plurality of data lines DL1 to DL9 in the touch display device 100 for transmitting data signals from the processing unit 110 to the pixel circuits 121A to 121D of the display panel 120. In addition, the pins B1~B10 are electrically connected to the multiple detection lines TP1 in the touch display device 100 through the switch circuits 130A~130E. ~TP5 is used to transmit the detection signal from the processing unit 110 to the touch units 122A, 122B...122(n-1), 122n of the display panel 120.

For ease of understanding, the operation of one of the switch circuits 130A and the corresponding pins B1~B2, the pixel circuits 121A~121D, and the touch units 122A~122B will be described first. Please refer to Figures 1 and 2. FIG. 2 is a partial schematic diagram of the touch display device 100 according to some embodiments of the present disclosure. In some embodiments, the processing unit 110 includes a first pin B1. The first pin B1 is electrically connected to the first data line DL1 and the first detection line TP1, so that the processing unit 110 transmits the first data signal Sd1 through the first pin B1 and the first data line DL1. The first pin B1 also transmits the first detection signal St1 through the first pin B1 and the detection line TP1.

The display panel 120 includes a first pixel circuit 121A and a touch unit 122A. The first pixel circuit 121A is electrically connected to the first data line DL1 for receiving the first data signal Sd1. The touch unit 122A is electrically connected to the first detection line TP1 for receiving the first detection signal St1. Since those skilled in the art can understand the driving principle of the pixel circuit and the touch detection principle of the touch unit, it will not be repeated here.

The switch circuit 130A is electrically connected between the first pin B1 and the first detection line TP1. The switch circuit 130A can conduct the first pin B1 to the first detection line TP1 according to the control signal Sc. That is, when the switch circuit 130A is turned on, the processing unit 110 can transmit the first detection signal St1 to the touch unit 120A through the first pin B1, the switch circuit 130A, and the first detection line TP1. In some embodiments, the control signal Sc is generated by the processing unit 110 and transmitted to the switch circuit 130A through the control line CL.

As mentioned above, the processing unit 110 transmits the first data signal Sd1 and the first detection signal St1 through the same first pin B1. Accordingly, the number of pins required to be configured on the processing unit 110 can be reduced, so as to improve the cost of the touch display device 100, and at the same time, the overall volume of the processing unit 110 can also be reduced.

In the conventional touch display device, the processing unit needs to transmit the data signal and the detection signal through different pins, so that the processing unit must have a larger number of pins. Therefore, the present disclosure improves the production cost of the processing unit 110 by means of "shared pins". In some embodiments, the switch circuit 130A is turned off during the display period, so that the processing unit 110 only transmits the first data signal Sd1 through the first data line DL1. The switch circuit 130A is turned on during the detection period, so that the processing unit 110 transmits the first detection signal St1 through the first detection line TP1. The details will be described later.

In some embodiments, the processing unit 110 further includes a second pin B2. The second pin B2 is electrically connected to the second data line DL2 and the first detection line TP1, so that the processing unit 110 transmits the second data signal Sd2 through the second pin B2 and the second data line DL2, and through the second connection The pin B2 and the first detection line TP1 transmit the first detection signal St1.

In some embodiments, the switch circuit 130A includes a first switch unit T1 and a second switch unit T2. The first terminal of the first switch unit T1 is electrically connected to the first detection line TP1, and the second terminal of the first switch unit T1 is electrically connected to the first pin B1. The control end of the first switch unit T1 is electrically connected to the control line CL, so that the first switch unit T1 is turned on according to the control signal Sc. For example: when the control signal Sc is at the enable level, the first switch unit T1 is turned on. Conversely, when the control signal Sc is at the disable level, the first switch unit T1 is turned off.

The first end of the second switch unit T2 is electrically connected to the first detection line TP1, and the second end of the second switch unit T2 is electrically connected to the second pin B2. The control end of the second switch unit T2 is electrically connected to the control line CL, so that the second switch unit T2 is turned on according to the control signal Sc. For example: when the control signal Sc is at the enable level, the second switch unit T2 is turned on. Conversely, when the control signal Sc is at the disable level, the second switch unit T2 is turned off.

In some embodiments, the first switch unit T1 is serially connected to the second switch unit R2 for transmitting the first detection signal St1 to the touch unit 122A. When the first switch unit T1 is serially connected to the second switch unit R2 and is electrically connected to the same detection line TP1, the switch circuit 130A can have a smaller impedance, which improves the accuracy of driving the touch unit 122A.

Please refer to FIG. 3, which is an equivalent schematic diagram of the touch circuit of the switch circuit 130A according to some embodiments of the present disclosure. As shown in Figures 2 and 3, the first switch unit T1 and the second switch unit T2 can be equivalent to switch impedances TR1 and TR2. The processing unit 110 generates a detection signal St1 through the front-end circuit 110A, and transmits it to the first detection line TP1 via the pins B1 to B2 and the switch impedances TR1 and TR2. Compared with the conventional technology, the present disclosure can reduce the number of circuit traces when the touch display device 100 realizes the “touch function”.

Please refer to FIG. 1. In some embodiments, the detection lines TP1 to TP5 are also electrically connected to the power supply circuit 130. The power supply circuit 123 applies the power supply voltage Vcom to the detection lines TP1 to TP5 according to the operating voltage Vt to ensure that all areas on the display panel 120 are covered by the same power Driven by pressure.

Please refer to FIG. 4, which is a schematic diagram of the touch display device 100 according to some embodiments of the present disclosure, in which the same elements as those in FIG. 1 are indicated by the same reference numerals. With reference to Figures 1 and 4, in some embodiments, a plurality of touch units are arranged in an array on the display panel 120, and are classified into a first detection area G1, a second detection area G2, and a second detection area G2. Three detection area G3. The distance between the first detection area G1 and the processing unit 110 is greater than the distance between the second detection area G2 and the processing unit 110. The distance between the second detection area G2 and the processing unit 110 is greater than the distance between the third detection area G3 and the processing unit 110; in the same way, in some embodiments, the detection area can be divided into vertical partitions for detection.

In the same way, in some embodiments, the switch circuit is divided into a plurality of switch circuit groups 130G1 to 130G3 according to the touch unit driven by it and the corresponding detection area. The switch circuit groups 130G1~130G3 respectively correspond to different control lines CL1~CL3. The control lines CL1~CL3 can transmit control signals Sc1~Sc3 at the same time, and can also transmit control signals Sc1~Sc3 sequentially.

In some embodiments, the touch display device 100 transmits data signals and detection signals in different time intervals. Please refer to FIG. 5, which is a signal waveform diagram of the touch display device 100 according to some embodiments of the present disclosure. In Figure 5, Sc1~Sc3 are used to represent the control signals transmitted by different control lines CL1~CL3. SG1~SG3 are used to represent the signals received in different detection areas G1~G3, and the signal source can be detection lines TP1~TP5 or data lines DL1~DL9.

As shown in FIG. 5, the processing unit 110 generates a data signal in the display period P1, and generates a detection signal in the detection period P2. Please match it as shown in Figure 2. Take the switch circuit 130A as an example. In the display period P1, the switch circuit 130A is turned off. At this time, the processing unit 110 transmits the first data signal Sd1 to the first pixel circuits 121A-121B through the first pin B1 and the first data line DL. As shown in FIG. 5, in the display period P1, the display panel 120 receives the data voltage through the pixel circuit to present various colors or brightness.

In the detection period P2, the switch circuit 130A is turned on. At this time, the processing unit 110 transmits the first detection signal St1 to the touch unit 122A through the first pin B1 and the detection line TP1. In the detection period P2, the first pin B1 also transmits the first detection signal St1 to the first pixel circuits 121A~121B through the first data line DL, but because the first pixel circuits 121A~121B are not Turn on (for example, the corresponding scan line is not turned on), so the first detection signal St1 will not be written into the first detection signal St1. As shown in FIG. 5, in the detection period P2, the display panel 120 receives the detection signal through the touch unit to detect the current touch operation of the user.

Please refer to FIGS. 1 and 4 together, and the touch display device 100 is explained from another perspective. In some embodiments, the touch display device 100 includes a processing unit 110, a display panel 120, and a plurality of switching circuits (ie, switching circuits 130A to 130E). The processing unit 110 includes a plurality of pins B1 ˜Bn. The pins B1~Bn are output pins of the processing unit 110, which are electrically connected to a plurality of data lines DL1~DL9 and a plurality of detection lines TP1~TP5 for sending a plurality of data signals and a plurality of detection signals.

The display panel 120 includes a plurality of pixel circuits 121A to 121D and a plurality of touch units 122A, 122B...122(n-1), 122n. The pixel circuits 121A to 121D receive the data signals through the data lines DL1 to DL9. The touch units 122A, 122B...122(n-1), 122n receive the detection signals through the detection lines TP1 to TP5. In some embodiments, the pixel circuits 121A to 121D are arranged on the display panel 120 in an array, and each pixel circuit 121A to 121D is used to display a sub-pixel, for example: The pixel circuit 121A displays red, and the pixel circuit 121C displays green.

In some embodiments, the number of the pins B1~Bn is greater than or equal to the number of the pixel circuits in the same row on the display panel 120 (ie, the number of sub-pixels in each row) ). As shown in FIGS. 1 and 2, the number of pins B1 ˜Bn is equal to the number of pixel circuits in the same row on the display panel 120. In other embodiments, the switch circuit 130A includes the pins B1 and B2 and the first switch unit T1, but does not include the second switch unit T2. The pin B1 is electrically connected to one end of the first switch unit T1 and the first data line DL1. The pin B2 is electrically connected to the other end of the first switch unit T1 and the detection line TP1.

The switch circuits 130A~130E are electrically connected to the pins B1~B10 and the detection lines TP1~TP5, and according to the control signal Sc, the pins B1~B10 are connected to the detection lines TP1~TP5 (As shown in Figure 1). In other embodiments, as shown in Figure 4, the switch circuits 130A~130E are classified into different switch circuit groups 130G1~130G3, and the switch circuits in the different switch circuit groups 130G1~130G3 130A~130E are electrically connected to different control lines CL1~CL3 for conducting according to different control signals Sc1~Sc3.

Please refer to FIG. 6, which is a simplified schematic diagram of the touch display device 100 according to some embodiments of the present disclosure. In some embodiments, the switch unit 130X is used to transmit the detection signal to the touch unit 122X through the detection line TPX. The switch unit 130Y is used to transmit a detection signal to the touch unit 122Y through the detection line TPY. As shown in FIG. 4, the touch unit 122X is located in the second detection area G2 of the display panel 120, and the touch unit 122Y is located in the first detection area G1 of the display panel 120. Since the touch unit 122Y is far from the processing unit 110, the detection line TPY is also electrically connected to the two driving lines TPY1, TPY2, and then electrically connected to the touch in the first detection area G1 through the driving lines TPY1, TPY2. Control unit 122Y. That is, the touch unit in the first detection area G1 can be electrically connected to the corresponding detection line through two or more driving lines.

In addition, as shown in Figure 1, in some embodiments, a touch unit 122A in the touch display device 100 is electrically connected to at least two switch circuits (such as switch circuits) through detection lines TP1 and TP2. 130A, 130B). In other embodiments, as shown in FIG. 6, the touch unit 122X can be electrically connected to a single switch circuit 130X through only a single detection line TPX. For example, as shown in Figure 4, the touch unit located in the first detection area G1 can be electrically connected to multiple switch circuits, and the touch unit located in the second detection area G2 can be electrically connected to a switch Circuit.

As shown in Figure 1, in the foregoing embodiment, the switching circuits 130A to 130E are overlapped with the processing unit 110 and are arranged in the same area. For example, the switch circuits 130A to 130E are located below the processing unit 110. In other embodiments, the switch circuits 130A to 130E may also be disposed in the fan out area FA of the touch display device 100. Please refer to FIG. 7. In FIG. 7, similar elements related to the embodiment in FIG. 1 are denoted by the same reference numerals for ease of understanding, and the specific principles of similar elements have been described in detail in the previous paragraphs. If it is not necessary to introduce the elements that have a cooperative relationship with the elements in FIG. 7, it will not be repeated here. In this embodiment, the switch circuit 130A is located in the fan-out area FA to be electrically connected to the pins B1 and B2 and the detection line TP1 and the data lines DL1 and DL2, respectively. Accordingly, it is also possible to transmit data signals and detection signals through the same pins B1 and B2.

The various elements, operating states, or technical features in the foregoing embodiments can be combined with each other, and are not limited to the order of description or presentation of figures in the present disclosure.

Although the present disclosure has been disclosed in the above embodiments, it is not intended to limit the content of the present invention. Anyone who is familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection of the content shall be subject to the scope of the attached patent application.

100‧‧‧Touch display device

110‧‧‧Processing unit

120‧‧‧Display Panel

121A‧‧‧Pixel circuit

121B‧‧‧Pixel circuit

121C‧‧‧Pixel circuit

121D‧‧‧Pixel circuit

122A‧‧‧touch unit

122B‧‧‧Touch Unit

122(n-1)‧‧‧Touch unit

122n‧‧‧touch unit

123‧‧‧Power supply circuit

130A~130E‧‧‧Switching circuit

B1~B10‧‧‧pin

DL1~DL9‧‧‧Data line

TP1~TP5‧‧‧Detection line

CL‧‧‧Control line

Vt‧‧‧Operating voltage

Vcom‧‧‧electrode voltage

FA‧‧‧Fan-out area

Claims (17)

A touch display device includes: a processing unit including a first pin, wherein the first pin is electrically connected to a first data line and a detection line, so that the processing unit passes through the first pin and The first data line transmits a first data signal, and transmits a first detection signal through the first pin and the detection line; a display panel includes a first pixel circuit and a touch unit, wherein The first pixel circuit is electrically connected to the first data line for receiving the first data signal; the touch unit is electrically connected to the detection line for receiving the first detection signal; and a switch circuit , Electrically connected to the first pin and the detection line, and conducts the first pin to the detection line according to a control signal. The touch display device according to claim 1, wherein the processing unit further includes a second pin; the second pin is electrically connected to a second data line and the detection line, so that the processing unit passes through the first The two pins and the second data line transmit a second data signal, and the first detection signal is transmitted through the second pin and the detection line. The touch display device according to claim 2, wherein the switch circuit includes: a first switch unit electrically connected to the detection line and the first pin, and turned on according to the control signal; and a second switch The unit is electrically connected to the detection line and the second pin, And turn on according to the control signal; the first switch unit is serially connected to the second switch unit. The touch display device according to claim 1, wherein in a display period, the switch circuit is turned off, and the processing unit transmits the first data signal through the first pin and the first data line. The touch display device according to claim 4, wherein in a detection period, the switch circuit is turned on, so that the processing unit transmits the first detection signal through the first pin and the detection line. The touch display device according to claim 1, wherein the switch circuit and the processing unit are overlapped and arranged in the same area of the touch display device. The touch display device according to claim 1, wherein the switch circuit is disposed in a fan-out area of the touch display device. A touch display device includes: a processing unit including a plurality of pins, wherein the pins are electrically connected to a plurality of data lines and a plurality of detection lines to send a plurality of data signals and a plurality of detection signals; The display panel includes a plurality of pixel circuits and a plurality of touch units, wherein the pixel circuits receive the data signals through the data lines, the The touch unit receives the detection signals through the detection lines; and a plurality of switch circuits are electrically connected to the pins and the detection lines, and conducts the pins to the detection lines according to a control signal line. The touch display device according to claim 8, wherein one of the switch circuits includes: a first switch unit electrically connected to one of the detection lines and one of the pins, And is turned on according to the control signal; and a second switch unit is electrically connected to one of the detection lines and the other of the pins, and is turned on according to the control signal; the first switch unit is connected in series with The second switch unit. The touch display device according to claim 8, wherein the pixel circuits are arranged on the display panel in an array, and the number of the pins is equal to that of the pixel circuits in the same column on the display panel Quantity. The touch display device according to claim 8, wherein one of the touch units is electrically connected to at least two of the switch circuits. The touch display device according to claim 8, wherein the touch units are arranged in an array on the display panel and are at least classified into a first detection area and a second detection area, the first The distance between a detection area and the processing unit is greater than the distance between the second detection area and the processing unit. The touch display device according to claim 12, wherein the touch units located in the first detection area are electrically connected to a corresponding one of the detection lines through a plurality of driving lines. The touch display device according to claim 8, wherein in a display period, the switch circuits are turned off, and the processing unit transmits the data signals through the pins and the data lines. The touch display device according to claim 8, wherein in a detection period, the switch circuits are turned on, so that the processing unit transmits the detection signals through the pins and the detection lines. The touch display device according to claim 8, wherein the switch circuits and the processing unit are overlapped and arranged in the same area of the touch display device. The touch display device according to claim 8, wherein the switch circuits are disposed in a fan-out area of the touch display device.

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