TWI861680B - Touch display device - Google Patents

Abstract

A touch display device is provided. The touch display device includes a touch display panel and a touch and display driver chip. The touch display panel has a touch module and a display module. The touch and display driver chip has a touch circuit and a display circuit, wherein the touch circuit has a first communication interface and is coupled to the touch module, and the display circuit has a second communication interface and is coupled to the display module. When the touch display device is in a standby mode, the display circuit enters a sleep mode, and the touch circuit enters a gesture sensing mode to determine whether the touch module senses a wake-up gesture. When the touch module senses the wake-up gesture, the touch circuit sends a wake-up command to the second communication interface through the first communication interface to wake up the display circuit.

Description

Touch display device

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

Traditional touch display devices will interrupt the application on the host when sensing a wake-up gesture. Then, the application provides relevant instructions to the touch display device to trigger the touch display device to wake up. However, the above handshaking process will have system integration issues, affecting the time it takes for customers to introduce products, and the wake-up time of the touch display device is easily affected by system performance.

The present invention provides a touch display device that can respond to a user's touch and quickly wake up to quickly restore the screen display.

The touch display device of the present invention includes a touch display panel and a touch and display driver chip. The touch display panel has a touch module and a display module. The touch and display driver chip has a touch circuit and a display circuit, wherein the touch circuit has a first communication interface and is coupled to the touch module, and the display circuit has a second communication interface and is coupled to the display module. When the touch display device is in standby mode, the display circuit enters a sleep mode, and the touch circuit enters a gesture sensing mode to determine whether the touch module senses a wake-up gesture. When the touch circuit determines that the touch module senses a wake-up gesture, the touch circuit sends a wake-up command to the second communication interface via the first communication interface to wake up the display circuit.

Based on the above, in the touch display device of the embodiment of the present invention, since the touch circuit and the display circuit are integrated into the same chip, the wake-up command of the touch circuit can be transmitted to the display circuit more quickly, so that the display circuit can respond to the wake-up command more quickly and wake up quickly, that is, it can respond quickly to the user's wake-up gesture and quickly restore the screen display.

In order to make the above features and advantages of the present invention more clearly understood, embodiments are specifically cited below and described in detail with reference to the accompanying drawings.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by ordinary technicians in the field to which the present invention belongs. It will be further understood that those terms as defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and the present invention, and will not be interpreted as an idealized or overly formal meaning unless expressly defined as such in this document.

It should be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and/or parts, these elements, components, regions, and/or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, the "first element", "component", "region", "layer" or "part" discussed below can be referred to as a second element, component, region, layer or part without departing from the teachings of this article.

The terms used herein are for the purpose of describing specific embodiments only and are not restrictive. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms, including "at least one". " or "means" and/or". As used herein, the terms "and/or" include any and all combinations of one or more of the relevant listed items. It should also be understood that when used in this specification, the terms "include" and/or "include" specify the presence and/or parts of the features, regions, entireties, steps, operations, elements, components and/or parts, but do not exclude the presence or addition of one or more other features, regions, entireties, steps, operations, elements, components and/or combinations thereof.

FIG1 is a system schematic diagram of a touch display device according to an embodiment of the present invention. Referring to FIG1 , in this embodiment, the touch display device 100 includes a touch display panel 110 and a touch and display driver chip 120, wherein the touch display panel 110 has a touch module 111 and a display module 113, and the touch and display driver chip 120 has a touch circuit 121 and a display circuit 123. The touch circuit 121 has a first communication interface 210 and is coupled to the touch module 111, and the display circuit 123 has a second communication interface 310 and is coupled to the display module 113, wherein the first communication interface 210 is directly coupled through the circuit in the touch and display driver chip 120.

In this embodiment, the touch display device 100 may enter the standby mode based on the user's operation or the time exceeds a predetermined value. When the touch display device 100 is in the standby mode, the display circuit 123 enters the sleep mode, but the touch circuit 121 enters the gesture sensing mode to determine whether the touch module 111 senses a wake-up gesture, wherein the wake-up gesture may include a finger tap, but the embodiment of the present invention is not limited thereto.

When the touch module 111 determines that the touch module 111 senses a wake-up gesture, the touch module 111 sends a wake-up command CMD_WK to the second communication interface 310 via the first communication interface 210 to wake up the display circuit 123. Thus, since the touch circuit 121 and the display circuit 123 are integrated into the same chip, the display circuit 123 can react more quickly to the wake-up command CMD_WK of the touch circuit 121 and wake up quickly, and can also react quickly to the user's wake-up gesture and quickly restore the screen display.

In the embodiment of the present invention, the touch module 111 can be integrated with the display module 113 in any manner. For example, the touch module 111 is attached to the display module 113, or the touch module 111 can be embedded in the display module 113. This is based on circuit requirements and the embodiment of the present invention is not limited thereto.

In the embodiment of the present invention, the first communication interface 210 and the second communication interface 310 correspond to each other, and the first communication interface 210 and the second communication interface 310 can be any type of communication interface, such as a serial peripheral interface (Serial Peripheral Interface, SPI), an inter-integrated circuit (Inter-Integrated Circuit, I²C) bus circuit, a mobile industry processor interface (Mobile Industry Processor Interface, MIPI), etc., but the embodiment of the present invention is not limited thereto.

In the embodiment of the present invention, the touch circuit 121 further has a third communication interface 220 for coupling to the host 10, and the display circuit 123 further has a fourth communication interface 320 for coupling to the host 10. The third communication interface 220 is, for example, a serial peripheral interface or an integrated circuit bus circuit, and the fourth communication interface 320 is, for example, a mobile industry processor interface, a serial peripheral interface, a dual-SPI, a quad-SPI, etc., but the embodiment of the present invention is not limited thereto.

FIG2 is a flowchart of a gesture wake-up process of a touch display device according to an embodiment of the present invention. Referring to FIG1 and FIG2, in this embodiment, the gesture wake-up process includes the following steps. In step S110, the display circuit 123 is in a sleep mode, and the touch circuit 121 is in a gesture sensing mode.

In step S120, the touch control circuit 121 determines whether the touch control module 111 senses the wake-up gesture. When the touch control circuit 121 determines that the touch control module 111 does not sense the wake-up gesture, that is, the determination result is "no", the process returns to step S120; when the touch control circuit 121 determines that the touch control module 111 senses the wake-up gesture, that is, the determination result is "yes", the process proceeds to step S130. In step S130, the wake-up command CMD_WK is sent from the touch control circuit 121 to the display circuit 123. In step S140, the touch circuit 121 sends a wake-up interrupt signal TP_INT to the host 10 via the third communication interface 220. In step S150, the touch circuit 121 enters the startup mode, and the display circuit 123 enters the normal mode.

In one embodiment of the present invention, step S140 may be omitted, but the present invention is not limited thereto.

FIG3 is a timing diagram of a touch display device waking up according to an embodiment of the present invention. Referring to FIG1 and FIG3, in this embodiment, the waking up command CMD_WK includes a sleep exit command Sleep_Out and a display on command Disp_On. Further, when the display circuit 123 is in the sleep mode, the touch circuit 121 is in the gesture sensing mode to determine whether the touch circuit 121 senses a waking up gesture.

Furthermore, when the touch module 111 senses the wake-up gesture, the wake-up interrupt signal TP_INT will be pulled low, that is, the touch circuit 121 will send the wake-up interrupt signal TP_INT to the host 10 to inform the host 10 (or the application running on the host 10) that the touch display device 100 is about to be awakened. Then, the sleep exit command Sleep_Out and the display start command Disp_On are transmitted in sequence between the first communication interface 210 and the second communication interface 310 to control the display circuit 123 to exit the sleep mode and then start the display of the screen. After the display-on command Disp_On is issued, the touch circuit 121 enters the startup mode to determine the position of the touch module 111 touched by the user, and after receiving the display-on command Disp_On, the display circuit 123 enters the normal mode.

FIG4 is a timing diagram of a touch display device waking up according to another embodiment of the present invention. Referring to FIG1, FIG3 and FIG4, the timing diagram of FIG4 is substantially the same as the timing diagram of FIG3, except that when the touch module 111 senses a wake-up gesture, the wake-up interrupt signal TP_INT will not be pulled low, that is, when the touch circuit 121 determines that the touch module 111 senses a wake-up gesture, the touch circuit 121 does not send the wake-up interrupt signal TP_INT for notifying the host 10.

FIG5 is a system diagram of a touch circuit and a display circuit according to an embodiment of the present invention. Referring to FIG1 and FIG5 , in this embodiment, the touch and display driver chip 120a has a touch circuit 121a and a display circuit 123a, wherein the same or similar components use the same or similar reference numerals. In this embodiment, the touch circuit 121a includes a first communication interface 210, a third communication interface 220, a processor 230, a first memory 240, a hardware accelerator 250, a clock oscillator 260, a protection circuit 270, an analog-to-digital converter 280, and a touch sensing circuit 290.

The touch sensing circuit 290 is coupled to the touch module 111 to sense the touch module 111 to provide a sensing signal Ssen. The analog-to-digital converter 280 is used to convert the sensing signal Ssen into sensing data Dsen. The first memory 240 is used to store the sensing data Dsen. The processor 230 is used to process the sensing data Dsen to determine whether the touch module 111 senses a wake-up gesture. When the processor 230 determines that the touch module 111 senses a wake-up gesture, the processor 230 sends a wake-up command CMD_WK via the first communication interface 210. The hardware accelerator 250 is used to assist the processor 230 in processing the sensing data Dsen.

The clock oscillator 260 is used to provide a system clock CLK to at least the first memory 240, the processor 230 and the hardware accelerator 250. The protection circuit 270 is used to perform voltage protection on the first memory 240, the processor 230 and the hardware accelerator 250. The third communication interface 220 is coupled between the processor 230 and the host 10.

In this embodiment, the display circuit 123a includes a second communication interface 310, a fourth communication interface 320, a command decoder 330, a memory controller 340, a second memory 350, and a display driver 360. The second communication interface 310 is used to receive a wake-up command CMD_WK from the first communication interface 210. The command decoder 330 is used to decode the wake-up command CMD_WK to provide a command decoding signal Sdec.

The second memory 350 is used to store the startup data Ds and the display data Ddp. The memory controller 340 is used to extract the startup data Ds and the display data Ddp from the second memory 350 based on the command decoding signal Sdec, and provide the startup data Ds and the display data Ddp to the display driver 360. The display driver 360 is used to perform circuit configuration based on the startup data Ds, and drive the display module 113 to display the screen based on the display data Ddp.

In the embodiment of the present invention, the first memory 240 may include a static random access memory (SRAM), and the second memory 340 may include a random access memory (RAM), but the embodiment of the present invention is not limited thereto.

In the embodiment of the present invention, the protection circuit 270 may have a power on reset (POR) circuit and/or a low voltage detection (LVD) reset circuit. The power on reset circuit operates in such a way that when the power voltage reaches a threshold voltage, the power on reset circuit releases an internal reset signal to enable the state machine to start initializing internal devices.

On the other hand, after the chip is successfully powered on and reset, the power voltage at the chip end may drop due to system power disorder or abnormal power failure. If the system voltage is lower than the preset detection value, the low voltage detection reset circuit will take action to force the chip to reset, and delay for a period of time to ensure the stability of the system power. When the voltage at the power end of the chip rises to the preset detection value, the low voltage detection reset action is completed.

In summary, in the touch display device of the embodiment of the present invention, since the touch circuit and the display circuit are integrated into the same chip, the wake-up command of the touch circuit can be transmitted to the display circuit more quickly, so that the display circuit can respond to the wake-up command more quickly and wake up quickly, that is, it can respond quickly to the user's wake-up gesture and quickly restore the screen display.

Although the present invention has been disclosed as above by the embodiments, they are not intended to limit the present invention. Any person with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the scope of the attached patent application.

10: Host 100: Touch display device 110: Touch display panel 111: Touch module 113: Display module 120, 120a: Touch and display driver chip 121, 121a: Touch circuit 123, 123a: Display circuit 210: First communication interface 220: Third communication interface 230: Processor 240: First memory 250: Hardware accelerator 260: Clock oscillator 270: Protection circuit 280: Analog-to-digital converter 290: Touch sensing circuit 310: Second communication interface 320: Fourth communication interface 330: Command decoder 340: Memory controller 350: Second memory 360: Display driver CMD_WK: Wake-up command Ddp: Display data Disp_On: Turn on display command Ds: Start data Dsen: Sensing data Sdec: Command decoding signal Sleep_Out: Exit sleep command Ssen: Sensing signal TP_INT: Wake-up interrupt signal S110, S120, S130, S140, S150: Steps

FIG. 1 is a system schematic diagram of a touch display device according to an embodiment of the present invention. FIG. 2 is a flow chart of gesture awakening of a touch display device according to an embodiment of the present invention. FIG. 3 is a timing schematic diagram of awakening of a touch display device according to an embodiment of the present invention. FIG. 4 is a timing schematic diagram of awakening of a touch display device according to another embodiment of the present invention. FIG. 5 is a system schematic diagram of a touch circuit and a display circuit according to an embodiment of the present invention.

10: Host

100: Touch display device

110: Touch display panel

111: Touch module

113: Display module

120: Touch and display driver chip

121: Touch circuit

123: Display circuit

210: First communication interface

220: Third communication interface

310: Second communication interface

320: Fourth communication interface

CMD_WK: wake-up command

TP_INT: wake-up interrupt signal

Claims (8)

A touch display device includes: a touch display panel having a touch module and a display module; a touch and display driver chip having a touch circuit and a display circuit, wherein the touch circuit has a first communication interface and is coupled to the touch module, and the display circuit has a second communication interface and is coupled to the display module, wherein the first communication interface is coupled to the second communication interface, wherein When the touch display device is in a standby mode, the display circuit enters a sleep mode, and the touch circuit enters a gesture sensing mode to determine whether the touch module senses a wake-up gesture, wherein when the touch circuit determines that the touch module senses the wake-up gesture, the touch circuit sends a wake-up command to the second communication interface via the first communication interface to wake up the display circuit. A touch display device as described in claim 1, wherein the touch circuit further has a third communication interface, and when the touch circuit determines that the touch module senses the wake-up gesture, the touch circuit sends a wake-up interrupt signal to a host via the third communication interface. A touch display device as described in claim 1, wherein when the touch circuit determines that the touch module senses the wake-up gesture, the touch circuit does not send a wake-up interrupt signal for notifying a host. A touch display device as described in claim 1, wherein the touch circuit comprises: the first communication interface; a touch sensing circuit coupled to the touch module to sense the touch module to provide a sensing signal; an analog-to-digital converter to convert the sensing signal into sensing data; a first memory to store the sensing data; a processor to process the sensing data to determine whether the touch module senses the wake-up gesture, and when the processor determines that the wake-up gesture is When the touch module senses the wake-up gesture, the processor sends the wake-up command via the first communication interface; a hardware accelerator is used to assist the processor in processing the sensing data; a clock oscillator is used to provide a system clock to the first memory, the processor and the hardware accelerator; a protection circuit is used to perform voltage protection on the first memory, the processor and the hardware accelerator; and a third communication interface is coupled between the processor and a host. A touch display device as described in claim 1, wherein the display circuit includes: the second communication interface for receiving the wake-up command from the first communication interface; a command decoder for decoding the wake-up command to provide a command decoding signal; a display driver for driving the display module; a second memory for storing a startup data and a display data; a memory controller for extracting the startup data and the display data from the second memory based on the command decoding signal to provide the startup data and the display data to the display driver; and a fourth communication interface coupled between the command decoder and a host. A touch display device as described in claim 1, wherein the wake-up gesture includes a finger tap. A touch display device as described in claim 1, wherein the wake-up command includes a sleep exit command and a display start command. A touch display device as described in claim 7, wherein after issuing the display-on command, the touch circuit enters a startup mode, and after receiving the display-on command, the display circuit enters a normal mode.

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