CN115877969A - touch display device - Google Patents

Abstract

The invention provides touch display equipment which comprises a touch display panel, a time sequence control circuit board and a first driving circuit board. The time sequence control circuit board outputs first display data. The first driving circuit board is electrically coupled between the touch display panel and the timing control circuit board. The first driving circuit board comprises a first interface and a second interface. The first interface receives first display data from the timing control circuit board. The second interface outputs a first touch data to the sequential control circuit board. The first interface and the second interface are differential signal interfaces.

Description

touch display device

technical field

The present invention relates to an electronic device, in particular to a touch display device and a data transmission method thereof.

Background technique

As the size of the display becomes larger and larger, the distance of the wiring inside the display becomes longer and longer. In existing applications, the digital signals transmitted in the wires inside the display are transmitted using digital signals with an amplitude of 0-3V. As the wiring inside the display is getting longer and longer, the problems of power consumption and electromagnetic interference (EMI) caused by the transmission of digital signals in the wiring are becoming more and more serious. Therefore, how to eliminate the EMI problem caused by digital signal transmission has become an important issue.

Contents of the invention

A touch display device according to an embodiment of the present disclosure includes a touch display panel, a timing control circuit board, and a first driving circuit board. The timing control circuit board outputs a first display data. The first driving circuit board is electrically coupled between the touch display panel and the timing control circuit board. The first driving circuit board includes a first interface and a second interface. The first interface receives first display data from the timing control circuit board. The second interface outputs a first touch data to the timing control circuit board. The first interface and the second interface are differential signal interfaces.

Description of drawings

In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic diagram of a touch display device 100 according to an embodiment of the present disclosure.

FIG. 2 is a schematic diagram of a touch display device 200 according to an embodiment of the present disclosure.

FIG. 3 is a detailed schematic diagram of the processing chip 108 of the touch display device 100 in FIG. 1 according to an embodiment of the present disclosure.

4A , 4B and 4C are waveform diagrams when the touch display device 100 of FIG. 1 transmits the first display data 130 and the first touch data 132 according to an embodiment of the present disclosure.

The reference numerals in Fig. 1-4C are explained as follows:

100: touch display device

102: Touch display panel

104: The first drive circuit board

106: Timing control circuit board

108: Processing chip

110: Microcontroller

112: Timing controller

120: The first interface

122: The second interface

124: The third interface

126: The fourth interface

130: first display data

132: First touch data

140: display driving signal

142: Touch signal

104-2: Second drive circuit board

108-2, 108-3, 108-4: processing chip

200: touch display device

210: Routing

212, 250, 252: flexible flat cable

220: Image signal

222: Touch report

230: Host

240-1, 240-2, 240-3, 240-4: sensing unit

242-1, 242-2, 242-3, 242-4: sensing unit

244-1, 244-2, 244-3, 244-4: sensing unit

246-1, 246-2, 246-3, 246-4: sensing unit

P1: Part I

P2: Part Two

P11: First Subsection

P12: Second subsection

P21: Third Subsection

P22: Fourth Subpart

300, MCU: microcontroller

302. MUX: Multiplexer

304: memory

306: Source driver

308: Level shifter and GOP timing controller

310: I2C interface

LVDS: Low Voltage Differential Signal Interface

SPI: Serial Peripheral Interface

312, 314: Cascade SPI

TCON: Timing Controller

SX[320:1]: touch signal

S[1080:1]: display drive signal

CKP, CKN: frequency signal

TV0P, TV0N: data signal

TV1P, TV1N: data signal

S[0], S[1], S[2], S[3], S[4], S[5]: touch data

S[6], S[7], S[8], S[9], S[10], S[11]: touch data

D[n], D[0], D[1]: display data

CLK: frequency data

t, t1, t2: frequency period

Detailed ways

In order to make the above objects, features and advantages of some embodiments of the present disclosure more comprehensible, a detailed description is given below in conjunction with the accompanying drawings.

It must be understood that words such as "comprising" and "including" used in this specification are used to indicate the existence of specific technical features, values, method steps, operations, components and/or components, but do not exclude possible Plus more technical features, values, method steps, job processes, components, components, or any combination of the above.

Words such as "first", "second", "third", and "fourth" are used to modify components, not to indicate the priority or precedence relationship between them, but to distinguish components with the same name.

It should be noted that in the following embodiments, without departing from the spirit of the present disclosure, technical features in several different embodiments may be replaced, reorganized, and mixed to complete other embodiments. As long as the features of the various embodiments do not violate the spirit of the invention or conflict, they can be mixed and matched arbitrarily.

In the following description, the touch display panel 100 of FIG. 1 of the present disclosure is applied in a vehicle electronic device. The technical content of the touch display panel 100 disclosed in this disclosure can be applied to any suitable type of display device or electronic device with a display panel. The electronic device may include a display device, a backlight device, an antenna device, a sensing device or a splicing device, but is not limited thereto. The electronic device can be a bendable or flexible electronic device. The display device can be a non-self-illuminating display device or a self-illuminating display device. The antenna device can be a liquid crystal type antenna device or a non-liquid crystal type antenna device, and the sensing device can be a sensing device for sensing capacitance, light, thermal energy or ultrasonic waves, but not limited thereto. Electronic components may include passive components and active components, such as capacitors, resistors, inductors, diodes, transistors, and the like. The diodes may include light emitting diodes or photodiodes. The light emitting diode may include, for example, an organic light emitting diode (OLED), a submillimeter light emitting diode (mini LED), a micro light emitting diode (micro LED) or a quantum dot light emitting diode (quantum dot LED), but not limited thereto. . The splicing device may be, for example, a display splicing device or an antenna splicing device, but is not limited thereto. It should be noted that, the electronic device can be any permutation and combination mentioned above, but not limited thereto. In the following, the display device is used as an electronic device or a splicing device to illustrate the present disclosure, but the present disclosure is not limited thereto.

FIG. 1 is a schematic diagram of a touch display device 100 according to an embodiment of the present disclosure. As shown in FIG. 1 , the touch display device 100 includes a touch display panel 102 , a first driving circuit board 104 , and a timing control circuit board 106 . In some embodiments, the touch display panel 102 can detect a touch action from a user, and generate a touch signal 142 correspondingly. The first driving circuit board 104 includes a processing chip 108 . The processing chip 108 includes a first interface 120 and a second interface 122 . The processing chip 108 converts the touch signal 142 from the touch display panel 102 into a first touch data 132 , and transmits the first touch data 132 to the timing control circuit board 106 through the interface 122 . The processing chip 108 converts the first display data 130 from the timing control circuit board 106 into a display driving signal 140 through the first interface 120 , and transmits the display driving signal 140 to the touch display panel 102 . In some embodiments, the processing chip 108 is an analog touch display integration chip (ATDI) chip, but the disclosure is not limited thereto. In some embodiments, the timing control circuit board 106 includes a microcontroller 110 and a timing controller 112 .

The processing chip 108 receives the first display data 130 from the timing control circuit board 106 through the first interface 120 , converts the first display data 130 into a display driving signal 140 , and transmits the display driving signal 140 to the touch display panel 102 . In some embodiments, the first interface 120 and the second interface 122 are differential signal interfaces. In some embodiments, the differential signal interface is a point-to-point (Point to Point) interface, a low-voltage differential signaling (Low-Voltage Differential Signaling: LVDS) interface, or an embedded display port (embedded display port) interface, but the present disclosure does not limited to this. In some embodiments, the first interface 120 is a point-to-point interface, and the second interface 122 is a low-voltage differential signal interface, but the disclosure is not limited thereto.

According to some embodiments, the driving circuit board includes a first interface and a second interface. The first interface can be used to receive display data from the timing control circuit board, and the second interface can be used to output touch data to the timing control circuit board. Since the first interface and the second interface are differential signal interfaces, power consumption and electromagnetic interference (EMI) problems caused during data transmission can be greatly reduced.

FIG. 2 is a schematic diagram of a touch display device 200 according to an embodiment of the present disclosure. As shown in FIG. 2 , the touch display device 200 includes a touch display panel 102 , a first driving circuit board 104 , a second driving circuit board 104 - 2 , and a timing control circuit board 106 . The processing chip 108 and a processing chip 108 - 2 are disposed on the first driving circuit board 104 . The processing chip 108 is electrically connected to the processing chip 108 - 2 through the wiring 210 on the first driving circuit board 104 . A processing chip 108-3 and a processing chip 108-4 are disposed on the second driving circuit board 104-2. The processing chip 108-3 is electrically connected to the processing chip 108-4 through the wires on the second driving circuit board 104-2. In some embodiments, the first driving circuit board 104 is electrically connected to the second driving circuit board 104 - 2 through a flexible flat cable 212 . The first driving circuit board 104 is electrically connected to the timing control circuit board 106 through a flexible flat cable 250 . The second driving circuit board 104 - 2 is electrically connected to the timing control circuit board 106 through a flexible flat cable 252 .

In some embodiments, as shown in FIG. 2 , the first driving circuit board 104 outputs a first display driving signal (such as the display driving signal 140 in FIG. 1 ) to the first part P1 of the touch display panel 102, and the second driving circuit board 104 - 2 outputs the second display driving signal to the second portion P2 of the touch display panel 102 . In some embodiments, the touch display panel 102 includes a plurality of touch sensing units. In some embodiments, the first portion P1 of the touch display panel 102 can be subdivided into a first sub-portion P11 and a second sub-portion P12. The second part P2 of the touch display panel 102 can be subdivided into a third sub-section P21 and a fourth sub-section P22. For example, the sensing unit located in the first sub-portion P11 of the touch display panel 102 includes a sensing unit 240-1, a sensing unit 240-2, a sensing unit 240-3, and a sensing unit 240-4. The sensing units on the touch display panel 102 include the sensing unit 242-1, the sensing unit 242-2, the sensing unit 242-3, and the sensing unit 242-4 of the second sub-portion P12. The sensing units on the touch display panel 102 include the sensing unit 244-1, the sensing unit 244-2, the sensing unit 244-3, and the sensing unit 244-4 of the third sub-portion P21. The sensing units on the touch display panel 102 include the sensing unit 246-1, the sensing unit 246-2, the sensing unit 246-3, and the sensing unit 246-4 of the fourth sub-portion P22.

The processing chip 108 can receive touch signals from the sensing unit 240-1, the sensing unit 240-2, the sensing unit 240-3, and the sensing unit 240-4 in the first sub-part P11 (for example, FIG. 1 touch signal 142). The processing chip 108-2 can receive touch signals from the sensing unit 242-1, the sensing unit 242-2, the sensing unit 242-3, and the sensing unit 242-4 in the second sub-part P12. The processing chip 108-3 can receive touch signals from the sensing unit 244-1, the sensing unit 244-2, the sensing unit 244-3, and the sensing unit 244-4 in the third sub-part P21. Similarly, the processing chip 108-4 can receive touch signals from the sensing unit 246-1, the sensing unit 246-2, the sensing unit 246-3, and the sensing unit 246-4 in the fourth subsection P22. . Although in the embodiment of FIG. 2 , a single processing chip is electrically connected to four sensing units, the disclosure does not limit the number of sensing units connected to a single processing chip. In some embodiments, the touch display panel 102 further includes a plurality of display units (not shown). The display unit can display its corresponding image according to the display driving signal (for example, the display driving signal 140 in FIG. 1 ) from the processing chip 108 . In some embodiments, the touch display panel 102 can be a spliced combination of a display panel and a touch panel. In some embodiments, the touch display panel 102 can be an in-cell touch panel.

In some embodiments, as shown in FIG. 2 , taking the processing chip 108 on the first driving circuit board 104 as an example, the processing chip 108 receives signals from the microcontroller 110 in the timing control circuit board 106 through its first interface 120 The first display data 130 of . On the other hand, the processing chip 108 converts touch signals (for example, the touch signal 142 ) from the sensing unit 240-1, the sensing unit 240-2, the sensing unit 240-3, and the sensing unit 240-4. is the first touch data 132 . The processing chip 108 transmits the first touch data 132 to the microcontroller 110 through the second interface 122 for subsequent processing. Similarly, the processing chip 108-3 on the second driving circuit board 104-2 receives the signal from the microcontroller 110 in the timing control circuit board 106 through its third interface 124 (same as the first interface 120 of the processing chip 108). The second display data (not shown). On the other hand, the processing chip 108-3 can convert touch signals (not shown) from the sensing unit 244-1, the sensing unit 244-2, the sensing unit 244-3, and the sensing unit 244-4. It is a second touch data (not shown). The processing chip 108 - 3 transmits the second touch data to the microcontroller 110 through its fourth interface 126 (same as the second interface 122 of the processing chip 108 ) for subsequent processing. In addition, the processing chip 108-2 and the processing chip 108-4 may include the same or similar components as the processing chip 108-1, and perform the same or similar signal processing, which will not be repeated here.

In some embodiments, the microcontroller 110 can integrate the first touch data 132 from the processing chip 108, the processing chip 108-2, the processing chip 108-3, and the processing chip 108-4 respectively, and according to the first touch data 132 Generate a touch report 222 . The microcontroller 110 sends the touch report 222 to a host 230 for subsequent applications of the host 230 . The microcontroller 110 can receive an image signal 220 from a host 230 and convert the image signal 220 into first display data 130 for the processing chip 108 to receive through its first interface 120 . In some embodiments, the host 230 may be, for example, a central processing unit in a vehicle system, but the disclosure is not limited thereto.

FIG. 3 is a detailed schematic diagram of the processing chip 108 of the touch display device 100 in FIG. 1 according to an embodiment of the present disclosure. As shown in FIG. 3 , the processing chip 108 includes a microcontroller (MCU) 300, a multiplexer (MUX) 302, a memory 304, a source driver 306, a level shifter and a GOP timing controller 308, An integrated bus circuit (Inter-Integrated Circuit: I2C) interface 310, a first interface 120 (such as a point-to-point (Point to Point) interface), a second interface 122 (such as a low-voltage differential signal (LVDS) interface), a A cascaded serial peripheral interface (Serial Peripheral Interface: SPI) 312 and a cascaded SPI interface 314 . In some embodiments, the multiplexer 302 receives the touch signal SX[320:1] from the touch display panel 102, and correspondingly transmits the touch signal SX[320:1] to the microcontroller 300 according to the timing. The microcontroller 300 converts the touch signal SX[320:1] into the first touch data 132, and transmits the first touch data 132 to the microcontroller 110 in the timing control circuit board 106 through the second interface 122 . Next, the microcontroller 110 generates a touch report (such as the touch report 222 in FIG. 2 ) according to the first touch data 132 . The touch report can be sent to the host 230 for subsequent processing.

In some embodiments, the microcontroller 110 of the timing control circuit board 106 receives an image signal (such as the image signal 220 in FIG. 2 ) from the host 230 through an SPI interface. The microcontroller 110 converts the image signal into first display data 130 and transmits the display data to the processing chip 108 . The timing controller (TCON) 112 is used to configure the timing of the video signal. The processing chip 108 receives the first display data 130 through the first interface 120 . The source driver 306 correspondingly outputs the display driving signal S[1080:1] to the touch display panel 102 according to the first display data 130 . In some embodiments, the level shifter and GOP timing controller 308 are used to configure the voltage level and timing of the display driving signal S[1080:1]. In some embodiments, the memory 304 may store configuration parameters for initializing the processing chip 108 . When the initialization processing chip 108 performs reset, the microcontroller 300 can read the setting parameters in the memory 304 to perform initialization.

In some embodiments, the cascaded SPI interface 312 can receive timing information, touch information, and display drive information from an adjacent processing chip (not shown). The cascaded SPI interface 314 can transmit timing information, touch information, and display driving information of the processing chip 108 to the processing chip 108-2. In some embodiments, the microcontroller 300 can send a synchronization signal Sync to the cascaded SPI interface 314 , so that the adjacent processing chip 108 - 2 can obtain timing information, touch information, and display driving information of the processing chip 108 . In some embodiments, the processing chip 108 can receive an interrupt signal and a reset signal from the microcontroller 110 in the timing control circuit board 106 through the I2C interface 310 , but the disclosure is not limited thereto.

4A , 4B and 4C are waveform diagrams when the touch display device 100 of FIG. 1 transmits the first display data 130 and/or the first touch data 132 according to an embodiment of the present disclosure. The touch display device 100 transmits the first display data 130 and/or the first touch data 132 through a differential signal interface (for example, the first interface 120 and the second interface 122 ). As shown in FIG. 4A, the differential signal interface transmits the first display data through a pair of frequency signals (respectively, frequency signal CKP, frequency signal CKN) and at least a pair of data signals (respectively, data signal TV0P, data signal TV0N). 130 and at least one of the first touch data 132 . That is, the differential signal interface can transmit the first display data 130, The first touch data 132 , or transmit the first display data 130 and the first touch data 132 . According to some embodiments, the data signal TV0P and the data signal TV0N may carry the first display data 130 and/or the first touch data 132 . For example, in FIG. 4A, the data signal TV0P and the data signal TV0N carry touch data S[0], touch data S[1], touch data S[2], touch data S[3], touch Data S[4], touch data S[5]. In the embodiment of FIG. 4A , in one frequency period t, two pieces of data (for example, touch data S[0] and touch data S[1]) can be transmitted. In some embodiments, the amplitudes of the clock signal CKP, the clock signal CKN, the data signal TV0P, and the data signal TV0N may be 150mV˜450mV.

As shown in FIG. 4B , the differential signal interface of the touch display device 100 passes through a pair of frequency signals (the frequency signal CKP and the frequency signal CKN) and two pairs of data signals (the data signal TV0P and the data signal TV0N respectively). , the data signal TV1P, and the data signal TV1N) transmit the first display data 130 and/or the first touch data 132 . The data signal TV0P, the data signal TV0N, the data signal TV1P, and the data signal TV1N can carry the first display data 130 and/or the first touch data 132 . For example, in FIG. 4B, the data signal TV0P and the data signal TV0N carry touch data S[0], touch data S[2], touch data S[4], touch data S[6], touch Data S[8], touch data S[10]. The data signal TV1P and data signal TV1N carry touch data S[1], touch data S[3], touch data S[5], touch data S[7], touch data S[9], touch control data S[11]. In the embodiment of FIG. 4B, in one frequency cycle t, 4 pieces of data (such as touch data S[0], touch data S[1], touch data S[2], touch data S[3]). In some embodiments, the amplitudes of the clock signal CKP, the clock signal CKN, the data signal TV0P, the data signal TV0N, the data signal TV1P, and the data signal TV1N may be 150mV˜450mV. This disclosure does not limit the amount of data carried by a single frequency cycle.

In simple terms, when the differential signal interface (such as the first interface 120 and the second interface 122 in FIG. 1) includes a pair of data signals, in a single frequency period of the pair of frequency signals, the pair of data signals can transmit N numbers of Display data or touch data. When the differential signal interface (such as the first interface 120 and the second interface 122 in FIG. 1) includes two pairs of data signals, in a single frequency period of the pair of frequency signals, these two pairs of data signals can transmit 2N pens of display data or touch data. N is a positive integer.

As shown in FIG. 4C , the differential signal interface of the touch display device 100 passes through a pair of frequency signals (the frequency signal CKP and the frequency signal CKN) and a pair of data signals (the data signal TV0P and the data signal respectively). TVON) transmits the first display data 130 and/or the first touch data 132 . The data signal TV0P and the data signal TV0N can simultaneously carry the first display data 130 and the first touch data 132 . For example, in FIG. 4C, data signal TV0P and data signal TV0N carry display data D[n], touch data S[0], touch data S[1], display data D[0], and display data D [1].

In some embodiments, in the frequency period t2, the data signal TV0P and the data signal TV0N can further carry the frequency data CLK, and the amplitude of the frequency data CLK can be correspondingly set according to the subsequent data content. For example, when the data content after the frequency data CLK includes display data and touch data at the same time, the present disclosure can set the amplitude of the frequency data CLK to be 450 mV. For example, when the data content after the frequency data CLK is all display data, the present disclosure can set the amplitude of the frequency data CLK to be 300 mV. In some embodiments, in the frequency period t1, the data signal TV0P and the data signal TV0N may further carry an indicator. The indicator can also indicate the disposition of display data and/or touch data in the data signal TV0P and the data signal TV0N. For example, when the data content behind the indicator includes display data and touch data at the same time, the disclosure performs the first pulse width modulation on the indicator. For example, when the data content behind the indicator is all touch data, the disclosure performs the second pulse width modulation on the indicator. The first PWM is different from the second PWM.

In the touch display device 100 of the present disclosure, according to some embodiments, the driving circuit board includes a first interface and a second interface. The first interface can be used to receive display data from the timing control circuit board, the second interface can be used to output touch data to the timing control circuit board, and the first interface and the second interface are differential signal interfaces, so that the data can be greatly reduced Power consumption and electromagnetic interference (EMI) problems caused by the transmission process. According to some embodiments, the processing chip 108 receives the first display data 130 from the timing control circuit board 106 through the first interface 120 in a differential signal manner. On the other hand, the processing chip 108 also outputs the first touch data 132 to the timing control circuit board 106 in the form of a differential signal through the second interface 122 . In detail, since the data transmission between the processing chip 108 and the microcontroller 110 in the timing control circuit board 106 uses differential signals, power consumption and electromagnetic interference (EMI) caused during data transmission can be greatly reduced. question.

While the embodiments of the present disclosure have been described above, it should be understood that the foregoing is presented by way of example only, and not limitation. Many modifications of the above exemplary embodiments according to this embodiment can be implemented without departing from the spirit and scope of the disclosure. Therefore, the breadth and scope of the present disclosure should not be limited by the above-described embodiments. Rather, the scope of the present disclosure should be defined by the following claims and their equivalents. Although the above disclosure has been illustrated and described by one or more pertinent implementations, equivalent alterations and modifications will occur to others skilled in the art in light of the above specification and drawings. Furthermore, although a particular feature of the present disclosure has been demonstrated by one of the associated implementations, the above-mentioned feature may be combined with one or more other features as may be required and useful for any known or particular application .

The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. Unless the context clearly indicates otherwise, as used herein, the meanings of 1, this and the above also include plural forms. Furthermore, the words "comprise", "comprise", "(have, have) have", "have", or variations thereof are used either as elaborations or as claims. However, the above words are meant to include, and to some extent, are meant to be equivalent to the word "comprising". Unless otherwise defined, all terms (including technical or scientific terms) used herein are commonly understood by those skilled in the art disclosed above. We should be more aware that the above terms, such as those defined in commonly used dictionaries, should be interpreted as the same meanings in the context of related technologies. Unless expressly defined herein, the above terms are not to be interpreted in an idealized or overly formal sense.

Claims (10)

1. A touch display device, comprising:

a touch display panel;

the time sequence control circuit board is used for outputting first display data; and

the first driving circuit board is electrically coupled between the touch display panel and the time sequence control circuit board;

wherein, this first drive circuit board includes:

a first interface for receiving the first display data from the timing control circuit board;

the second interface is used for outputting first touch data to the time sequence control circuit board;

wherein, the first interface and the second interface are differential signal interfaces.

2. The touch display device of claim 1, wherein the differential signal interface is a point-to-point interface, a Low Voltage Differential Signaling (LVDS) interface, or an embedded display port (embedded display port) interface.

3. The touch display device of claim 2, wherein one of the first interface and the second interface is the point-to-point interface, and the other is the low voltage differential signaling interface.

4. The touch display device of claim 1, further comprising:

the second driving circuit board is electrically coupled between the touch display panel and the time sequence control circuit board;

wherein, this second drive circuit board includes:

a third interface for receiving a second display data from the timing control circuit board:

the fourth interface is used for outputting second touch data to the time sequence control circuit board;

the third interface and the fourth interface are differential signal interfaces.

5. The touch display device of claim 4, wherein the touch display panel comprises a first portion and a second portion; the first driving circuit board outputs a first display driving signal to the first portion of the touch display panel, and the second driving circuit board outputs a second display driving signal to the second portion of the touch display panel.

6. The touch display device of claim 4, wherein the second driving circuit board is electrically coupled to the first driving circuit board.

7. The touch display device of claim 1, wherein a differential signal interface transmits at least one of the first display data and the first touch data via a pair of frequency signals and at least one pair of data signals.

8. The touch display device of claim 7, wherein the at least one pair of data signals is used to carry at least one of the first display data and the first touch data.

9. The touch display device of claim 1, further comprising:

the processing chip is arranged on the first driving circuit board;

the processing chip converts a touch signal from the touch display panel into the first touch data and transmits the first touch data to the time sequence control circuit board.

10. Touch display device according to claim 9,

the processing chip converts the first display data from the time sequence control circuit board into a display driving signal and transmits the display driving signal to the touch control display panel.

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