Display control signal processing method, apparatus and system, and touch display apparatus

Abstract

Provided in the present invention are a display control signal processing method, apparatus and system, and a touch display apparatus. The display control signal processing method comprises: receiving original display control signals sent by a host; storing the original display control signals in a cache; by using the frequency of an external crystal oscillator as a base frequency, converting the original display control signals, so as to obtain converted display control signals, wherein the converted display control signals satisfy the period of the converted display control signals being stable and the period of required time-sharing control signals being exactly divisible by the period of the converted display control signals, and the required time-sharing control signals are used for time-sharing control display and touch; and sending the converted display control signals to an LTDI chip, such that the LTDI chip counts the converted display control signals to obtain the required time-sharing control signals. The present invention can ensure that generated time-sharing control signals are more stable and have higher precision.

Description

Processing method, device and system of display control signal and touch display device

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410832006.9, filed on June 25, 2024, the contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] Embodiments of the present application relate to the field of display technology, and in particular to a processing method, device and system of display control signal and a touch display device. BACKGROUND

[0004] In the architecture of an In Cell touch display device in the related technology, a host (also referred to as a front end), a TCON (logic board, also referred to as a screen driving board or center control board) and an LTDI (Large size Touch Display Integration) chip are included. The TCON receives a display control signal sent by the host and forwards it to the LTDI chip. The LTDI chip generates a time-sharing control signal (T_SYNC signal) according to the received display control signal. The time-sharing control signal is used to time-share control of display and touch.

[0005] The time-sharing control signal is a square wave signal with high and low level switching, which is generated by counting the time of each row of display control signal (corresponding to one period of the display control signal). The high level represents the display time, and the low level represents the touch time, or the high level represents the touch time, and the low level represents the display time.

[0006] Because the refresh time of each row of display data and the refresh time of each frame of display data of the display control signal on the host side fluctuate, the time of high and low level of the time-sharing control signal also fluctuates, causing the time-sharing control signal to be unstable. At the same time, when the touch display device is configured with an Active Pen, the fluctuation of the time of high and low level of the time-sharing control signal accumulates, causing the time-sharing control signal to be unable to match the timing of the Active Pen protocol, resulting in failure of input decoding of the Active Pen and affecting the function of the Active Pen. SUMMARY

[0007] Embodiments of the present application provide a processing method, device and system of display control signal and a touch display device, which are used to solve the problem that the time of high and low level of the time-sharing control signal generated in the existing touch display device fluctuates, causing instability and large error, and the timing of the Active Pen protocol does not match.

[0008] To solve the above technical problems, the present application is implemented as follows:

[0009] In a first aspect, the embodiments of the present application provide a processing method of display control signal, comprising:

[0010] receiving an original display control signal sent by a mainboard;

[0011] storing the original display control signal into a cache;

[0012] converting the original display control signal with the frequency of a plug-in crystal oscillator as a base frequency to obtain a converted display control signal, wherein the converted display control signal meets: the period of the converted display control signal is stable, and the period of a required time-division control signal can be divided by the period of the converted display control signal, and the required time-division control signal is used for time-division control of display and touch;

[0013] sending the converted display control signal to an LTDI chip, so that the LTDI chip counts the converted display control signal to obtain the required time-division control signal.

[0014] Optionally, the storing the original display control signal into the cache comprises: storing the original display control signal corresponding to one frame of image into the cache.

[0015] The sending the converted display control signal to the LTDI chip comprises: sending the converted display control signal corresponding to one frame of image to the LTDI chip.

[0016] Optionally, the sending the converted display control signal to the LTDI chip comprises:

[0017] generating a fake time-division control signal, wherein one period of the fake time-division control signal comprises a display area and a blank area, the display area corresponds to the display time of one frame of image, and the blank area corresponds to the interval time between adjacent frames of image;

[0018] sending the converted display control signal corresponding to one frame of image to the LTDI chip in the display area.

[0019] Optionally, the display area is high level, and the blank area is low level.

[0020] Optionally, in the case that the period of the required time-division control signal can be divided by the period of the original display control signal, the frequency of the converted display control signal is the same as the frequency of the original display control signal.

[0021] and / or

[0022] In the case that the period of the required time-sharing control signal cannot be divided by the period of the original display control signal, the frequency of the converted display control signal is greater than the frequency of the original display control signal.

[0023] Optionally, the original display control signal and the converted display control signal are square wave signals with high and low level switching, and one period of the original display control signal and the converted display control signal represents the display time of one row of display data.

[0024] Optionally, the original display control signal is an eDP_DE signal, and the converted display control signal is a TCON_DE signal.

[0025] Optionally, the required time-sharing control signal is a square wave signal with high and low level switching.

[0026] The high level represents the display time, and the low level represents the touch time.

[0027] Alternatively,

[0028] The high level represents the touch time, and the low level represents the display time.

[0029] Optionally, the required time-sharing control signal matches the timing of the active pen protocol.

[0030] In a second aspect, an embodiment of the present application provides a display control signal processing device, comprising:

[0031] a receiving module configured to receive an original display control signal sent by a mainboard;

[0032] an external crystal oscillator;

[0033] a caching module configured to save the original display control signal into a cache, and convert the original display control signal based on the frequency of the external crystal oscillator as a base frequency to obtain a converted display control signal, wherein the converted display control signal satisfies: the period of the converted display control signal is stable, the period of a required time-sharing control signal can be divided by the period of the converted display control signal, and the required time-sharing control signal is used for time-sharing control of display and touch;

[0034] a sending module configured to send the converted display control signal to an LTDI chip, so that the LTDI chip counts the converted display control signal to obtain the required time-sharing control signal.

[0035] In a third aspect, an embodiment of the present application provides a display control signal processing system, comprising a mainboard, a TCON, an external crystal oscillator and an LTDI chip, wherein:

[0036] The mainboard is configured to generate original display control signals and send the original display control signals to the TCON.

[0037] The TCON is configured to receive the original display control signals sent by the mainboard, save the original display control signals into a cache, convert the original display control signals based on a frequency of the external crystal oscillator to obtain converted display control signals, and the converted display control signals meet the following conditions: a period of the converted display control signals is stable, and a period of required time-sharing control signals can be divided by the period of the converted display control signals, and the required time-sharing control signals are used for time-sharing control of display and touch control.

[0038] The LTDI chip is configured to receive the converted display control signals sent by the TCON, count the converted display control signals to obtain a display time of one frame of image, and divide the display time of one frame of image into at least one display time and at least one touch time to obtain the required time-sharing control signals.

[0039] Optionally, the LTDI chip is a chip integrated with a Source IC, an MCU, an LS and a TMIC.

[0040] Optionally, the display control signal processing system further comprises:

[0041] An active pen, a timing of a protocol of the active pen matches the required time-sharing control signals.

[0042] In a fourth aspect, an embodiment of the present application provides a touch display device, comprising the display control signal processing system as described in the third aspect.

[0043] In a fifth aspect, an embodiment of the present application provides an electronic device, comprising a processor, a memory, and a program stored in the memory and executable on the processor, and when the program is executed by the processor, the steps of the display control signal processing method as described in the first aspect are implemented.

[0044] In a sixth aspect, an embodiment of the present application provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the display control signal processing method as described in the first aspect are implemented.

[0045] In a seventh aspect, a computer program product is provided, comprising computer instructions, and when the computer instructions are executed by a processor, the steps of the display control signal processing method as described in the first aspect are implemented.

[0046] In the embodiment of the present application, the TCON buffer receives the original display control signal, converts the original display control signal based on the frequency of the external crystal oscillator, so that the period of the converted display control signal is not only accurate, but also can be set according to the time of the required time-sharing control signal, thereby ensuring that the time-sharing control signal generated by the LTDI chip is more stable, has higher precision, and matches the timing of the active pen protocol. BRIEF DESCRIPTION OF DRAWINGS

[0047] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The detailed description is made with reference to the accompanying drawings.

[0048] FIG. 1 is a schematic diagram of an architecture of an in-cell touch display device in the related art;

[0049] FIG. 2 is a schematic diagram of an architecture of an in-cell touch display device in the related art;

[0050] FIG. 3 is a schematic diagram of generating a T_SYNC signal by counting an eDP_DE signal in the related art;

[0051] FIG. 4 is a schematic diagram of fluctuation of an eDP_DE signal in the related art;

[0052] FIG. 5 is a schematic diagram of a WGP active pen protocol;

[0053] FIG. 6 is a schematic diagram of a situation that an actual T_SYNC signal cannot match the active pen protocol;

[0054] FIG. 7 is a schematic diagram of a situation that an actual T_SYNC signal cannot match the active pen protocol;

[0055] FIG. 8 is a schematic diagram of a flow of a display control signal processing method according to an embodiment of the present application;

[0056] FIG. 9 is a schematic diagram of a structure of a display control signal processing system according to an embodiment of the present application;

[0057] FIG. 10 is a schematic diagram of timing of various signals according to an embodiment of the present application;

[0058] FIG. 11 is a schematic diagram of timing of various signals according to another embodiment of the present application;

[0059] FIG. 12 is a schematic diagram of a structure of a display control signal processing device according to an embodiment of the present application;

[0060] FIG. 13 is a schematic diagram of a structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0062] The technical terms related to the present application are briefly described below.

[0063] In-cell touch display device is a display device in which a touch panel function is embedded into a display panel.

[0064] The host board (host) is also called front-end or digital board, etc., and is used to generate display control signals.

[0065] The TCON is also called logic board, screen driving board or center control board.

[0066] The eDP (Embedded DisplayPort) is an internal digital interface based on the DisplayPort architecture and protocol, and is commonly used in various embedded display panel products, such as notebook computers, tablet computers, etc. This interface can support simultaneous transmission of multiple data, thereby achieving a transmission rate much higher than that of LVDS (low voltage differential signal). The eDP interface supports high-definition video transmission, including 2K, 4K, 8K, etc. resolutions.

[0067] The DE signal, also called effective data selection signal or data enable signal, plays a crucial role in the liquid crystal display circuit. The main function of the DE signal is to distinguish between valid and invalid video signals.

[0068] GOA is the abbreviation of Gate on Array, which can be understood as a gate IC integrated on glass. It is a low-cost design, and most narrow-frame display panels use GOA technology.

[0069] The LTDI (Large size Touch Display Integration) refers to large size touch display integration, and generally refers to NB (notebook) / minitor (monitor) / TV (television) and other larger size applications.

[0070] The touch pit, also called time-sharing control signal in the embodiments of the present application, is used to time-sharing control the display (Display) and touch (Touch), and is a square wave signal for high-low level switching.

[0071] Please refer to FIG. 1 and FIG. 2, which are schematic diagrams of the architecture of an in-cell touch display device in the related art, the touch display device comprising a host board, a TCON and an LTDI chip (LTDI IC), wherein in the present embodiment, the LTDI chip integrates the functions of a Source IC (SRIC), an MCU (micro control unit), an LS (level switch) and a TMIC (touch chip).

[0072] Please refer to FIG. 1 and FIG. 2, the TCON receives the display control signal (which can be an eDP_DE signal) sent by the host board, converts the eDP_DE signal into a TCON_DE and sends it to the LTDI IC, the LTDI IC generates a time-division control signal (T_SYNC signal) according to the received TCON_DE, which is used to time-division control display and touch, thereby achieving the effect of time-division driving of display and touch. The LTDI IC also performs mapping of GOA and display data and touch.

[0073] The LTDI IC generally only has a line buffer capable of storing 40-50 lines of display control signals, the LTDI IC pre-stores 40-50 lines of display control signals in the touch time of the T_SYNC signal in units of one period of the T_SYNC signal, and then receives and processes (i.e. processes and outputs the display control signals) in the display time of the T_SYNC signal, by the time the display time of one period ends, the last line of display control signals received is processed and outputted. Then in the touch time of the next period, 40-50 lines of display control signals are pre-stored again, and the display time of the next period continues to receive and process, and so on. Therefore, the period of the T_SYNC signal needs to be generated by counting the TCON_DE signal (the period is the same as that of the eDP_DE signal), as shown in FIG. 3.

[0074] The eDP_DE generated by the host board is unstable and fluctuates, and the precision is not high enough, so that the period of the generated TCON_DE is also unstable, as shown in FIG. 4, the fluctuation values of the TCON_DE are 5us (790ns+4.21us), 5.05us (830ns+4.22us), 5us (790ns+4.21us), 5.04us (830ns+4.21us) in turn, the T_SYNC signal generated by the LTDI IC also fluctuates by counting the TCON_DE (the period is the same as that of the eDP_DE signal). And the LTDI IC cannot generate an accurate T_SYNC signal length as required.

[0075] When the touch display device is configured with an active pen, the fluctuation of the time of the high and low levels of the time-sharing control signal accumulates, causing the time-sharing control signal to fail to match the timing of the active pen protocol, resulting in input decoding failure of the active pen and affecting the function of the active pen.

[0076] Taking 60Hz as an example and the eDP_DE signal as an example, the eDP_DE signal period is 5us (see FIG. 4), and the T_SYNC period can only be increased or decreased in multiples of 5us. Assuming that the required T_SYNC signal period is 817us, 817us cannot be divided by 5, and therefore the LTDIIC cannot generate an accurate 817us.

[0077] Referring to FIG. 5, the WGP active pen protocol stipulates that the WGP active pen downlink period is equal to 817us = 657us (display time) + 160us (touch time), which is accurate and fixed and cannot be changed. The 160us touch time of the active pen downlink must be included in the low level (TPEN) of the T_SYNC signal to work normally.

[0078] The LTDIIC sets the actual T_SYNC period = GB2*eDP_DE period. Wherein, GB2 is the number of eDP_DE periods.

[0079] In some embodiments, when GB2 is set to 162, the actual T_SYNC period is equal to 81*5+81*5.05 = 814.05. As shown in FIG. 6, in FIG. 6, the T_SYNC signal is only shown to TPEN3 (actually needs TPEN19), and from FIG. 6, it can be seen that the Touch of the Downlink stipulated by the active pen protocol and the actual T_SYNC signal differ by 817-814.05 = 2.95us at TPEN1. It can be seen that the farther the accumulation, the greater the difference between the Downlink and the actual T_SYNC signal, and the difference at TPEN19 is 2.95*19 = 56.05us. In this embodiment, TPEN is only a time period (pit) that can receive the downlink signal of the active pen. Generally, the downlink of the active pen does not occupy all the touch pits, and there are touch pits for finger sensing, tilt sensing, and / or noise sensing. Here, taking 60HZ and 20 touch pits as an example, if other frequencies or display pits and touch pits use different time lengths, there will be different numbers of touch pits. For example, 120Hz 8 touch pits.

[0080] In some embodiments, when GB2 is set to 163, the actual T_SYNC period is equal to 81*5+81*5.05+5=819.05us, or, equal to 81*5+81*5.05+5.05=819.1us (as shown in FIG. 7). In the actual T_SYNC period, the display time is equal to 65*5+65*5.05+5=658.25us, or, equal to 65*5.05+65*5+5.05=658.3us. As shown in FIG. 7, the touch of the Downlink defined by the pen protocol is 658.3-657 (theoretical display)=1.3us different from the actual TPEN1 part. It can be seen that the farther the accumulation, the greater the difference between the Downlink and the actual T_SYNC signal, and the difference between TPEN19 is (819.1-817)*18+1.3=39.1us.

[0081] As can be seen from the above example, due to the fluctuation of eDP_DE, the actual T_SYNC signal cannot match the timing defined by the protocol of the active pen, resulting in failure of input decoding of the active pen and affecting the function of the active pen.

[0082] To solve the above problem, please refer to FIG. 8 and FIG. 9, embodiments of the present application provide a display control signal processing method applied to a TCON in a touch display device, and the display control signal processing method comprises:

[0083] Step 11: receiving an original display control signal sent by a mainboard;

[0084] The refresh time of each row of display data and the refresh time of each frame of display data of the original display control signal can fluctuate.

[0085] In embodiments of the present application, the original display control signal can be an eDP_DE signal. Of course, in other embodiments, the original display control signal is not limited to an eDP_DE signal, but can also be an LVDS (low voltage differential signal) and the like, which is also applicable to the present application.

[0086] Step 12: saving the original display control signal to a cache;

[0087] The cache can be, for example, an SRAM (static random access memory) in FIG. 9.

[0088] Step 13: converting the original display control signal to obtain a converted display control signal, taking the frequency of the external crystal oscillator as a base frequency, wherein the converted display control signal is stable in period, and the period of a required time division control signal can be divided by the period of the converted display control signal, and the required time division control signal is used for time division control of display and touch;

[0089] Step 14: sending the converted display control signal to the LTDI chip, so that the LTDI chip counts the converted display control signal to obtain the required time division control signal.

[0090] In the embodiment of the application, the converted display control signal can be a TCON_DE signal.

[0091] In the embodiment of the application, the LTDI chip can be a chip integrating a Source IC, an MCU, an LS and a TMIC.

[0092] In the embodiment of the application, the TCON buffer receives the original display control signal, and converts the original display control signal taking the frequency of the external crystal oscillator as a base frequency, so that the time of each row and the time of each frame of the converted display control signal are not only accurate, but also can be set according to the time of the required time division control signal, thereby ensuring that the time division control signal generated by the LTDI chip is more stable and has higher precision, and matches the timing of the active pen protocol.

[0093] In some embodiments, the original display control signal can be saved into the buffer, including saving the original display control signal corresponding to one frame of image into the buffer, and the converted display control signal corresponding to one frame of image can be sent to the LTDI chip. Please refer to FIG. 9, the buffer in the embodiment of the application can be a frame buffer, that is, the buffer can store the display control signal corresponding to one frame of image.

[0094] In some embodiments, the converted display control signal can be sent to the LTDI chip, including:

[0095] generating a false time division control signal, wherein one period of the false time division control signal includes a display area and a blank area, the display area corresponds to the display time of one frame of image, and the blank area corresponds to the interval time between adjacent frames of image;

[0096] the converted display control signal corresponding to one frame of image is sent to the LTDI chip in the display area.

[0097] The false time-sharing control signal is also called as a Touch false pit in the embodiment of the application.

[0098] In the embodiment of the application, all TCON_DE signals of one frame of image are sent in one display area of the Touch false pit.

[0099] In the embodiment of the application, the TCON generates the false time-sharing control signal, which indicates that the TCON enters a T-SYNC mode, in the mode, the step 12 and the step 13 are executed, that is, the original display control signal is saved into the cache; and the original display control signal is converted with the frequency of the externally hung crystal oscillator as a base frequency.

[0100] In some embodiments, optionally, the display area is high level, and the blank area is low level.

[0101] In some embodiments, optionally, in the case that the period of the required time-sharing control signal can be divided by the period of the original display control signal, the frequency of the converted display control signal is the same as the frequency of the original display control signal.

[0102] In some embodiments, optionally, in the case that the period of the required time-sharing control signal cannot be divided by the period of the original display control signal, the frequency of the converted display control signal is greater than the frequency of the original display control signal.

[0103] In some embodiments, optionally, the original display control signal and the converted display control signal are both high-low level switching square wave signals, and one period of the original display control signal and the converted display control signal represents the display time of one row of display data.

[0104] In some embodiments, optionally, the original display control signal is an eDP_DE signal, and the converted display control signal is a TCON_DE signal.

[0105] In some embodiments, optionally, the required time-sharing control signal is a high-low level switching square wave signal.

[0106] The high level represents the display time, and the low level represents the touch time.

[0107] Or,

[0108] The high level represents the touch time, and the low level represents the display time.

[0109] In some embodiments, optionally, the required time-sharing control signal matches the timing of the active pen protocol.

[0110] The above-mentioned display control signal processing method of the present application will be described below in connection with specific embodiments.

[0111] Embodiment One

[0112] In this embodiment, the period of the required T_SYNC signal can be divided by the period of eDP_DE, and the period of the T_SYNC signal is error-free, and only the fluctuation of the T_SYNC signal needs to be solved.

[0113] As shown in FIG. 10, in the embodiment of the present application, the TCON enters the T_SYNC mode, so that the false T_SYNC signal generated by the TCON is high in the display area (Active) and low in the blanking area (VBlanking), wherein the high level is the display area interval of a frame of image, and the low level is the time interval between adjacent frames of image, and no action is taken, and this T_SYNC signal is the Touch false pit. In fact, the TCON does not perform the time-sharing work of display (Display) and touch (Touch), and the purpose of generating the false T_SYNC signal is that the TCON enters the T_SYNC mode.

[0114] As shown in FIG. 9, in the T_SYNC mode, the receiving module (eDP Receiver) receives the original display control signal (eDP_DE signal), saves the eDP_DE signal of a frame of image into the Frame buffer, and generates the TCON_DE signal (the generated TCON_DE signal has the same frequency as the eDP_DE signal) based on the frequency of the frequency-attached crystal oscillator outside the Frame buffer. At this time, all TCON_DE of a frame of image are sent in the high level of the false T_SYNC. Since the false T_SYNC high level is the entire display area, this scheme does not occupy additional display time.

[0115] In this way, the eDP_DE signal of the mainboard passes through the Frame buffer of the TCON, is punched out using the base frequency of the frequency-attached crystal oscillator, and is converted into the stable TCON_DE signal.

[0116] The LTDIIC then counts the stable TCON_DE, as shown in FIG. 10, divides the display time of a frame of image into a plurality of (for example, 4) Display times and a plurality of (for example, 4) Touch times, and thereby generates the LTDI_T_SYNC signal (i.e., the required time-sharing control signal, the real Touch pit), wherein the high level of the LTDI_T_SYNC signal is the display time, and the low level is the Touch time.

[0117] Then, the LTDIIC further performs mapping on the LTDI_T_SYNC signal, thereby avoiding the problems of fluctuation of refresh time of a line and time of a frame, and the generated LTDI_T_SYNC can be completely matched with the timing of the active pen protocol, thereby ensuring the application of the active pen.

[0118] Embodiment two of the present application

[0119] In the embodiment of the present application, the period of the required T_SYNC signal cannot be divided by the period of the eDP_DE, and both the fluctuation problem of the T_SYNC and the error problem of the T_SYNC need to be solved.

[0120] As shown in FIG. 11, similarly to the embodiment one, the difference is that after the eDP_DE is saved to the Frame buffer of the TCON, the frequency of the crystal oscillator hung outside the Frame buffer is taken as the base frequency, and the TCON_DE signal which is not only stable but also has higher precision is generated (the frequency of the TCON_DE signal is greater than the frequency of the eDP_DE), for example, the above-mentioned protocol stipulates that the period of the T_SYNC is 817us, and the TCON_DE can be set as 4.9817us, 817 / 4.9817=164, that is, one period of the T_SYNC is generated by counting 164 TCON_DEs. This scheme will occupy more display time (5-4.9817)*164=3us), which has little influence.

[0121] The LTDIIC further counts the stable and zero-error (the zero-error here means that the error is very small and can be ignored, for example, the error of the 27MHZ crystal oscillator can be accurately to 1 / 27M) TCON_DE, as shown in FIG. 11, the LTDIIC divides the display time of one frame of image into a plurality of (for example, 4) Display times and a plurality of (for example, 4) Touch times, thereby generating the LTDI_T_SYNC signal (that is, the required time-sharing control signal, the real Touch pit), the high level of the LTDI_T_SYNC signal is the display time, and the low level is the Touch time.

[0122] Then, the LTDIIC further performs mapping on the LTDI_T_SYNC signal, thereby avoiding the problems of fluctuation of refresh time of a line and time of a frame, and the generated LTDI_T_SYNC can be completely matched with the timing of the active pen protocol, thereby ensuring the application of the active pen.

[0123] It should be noted that the embodiment of the present application can be applied to any active pen protocol, such as MPP, WGP, HPP, USI, etc. The embodiment of the present application only illustrates the case of WGP.

[0124] Referring to FIG. 12, the embodiment of the present application further provides a processing device 20 for displaying a control signal, comprising:

[0125] a receiving module 21, configured to receive an original display control signal sent by a mainboard;

[0126] an external crystal oscillator 24;

[0127] a caching module 22, configured to save the original display control signal into a cache, and convert the original display control signal to obtain a converted display control signal, with a frequency of the external crystal oscillator 24 as a base frequency, wherein the converted display control signal satisfies: a period of the converted display control signal is stable, and a period of a required time division control signal can be divided by the period of the converted display control signal, and the required time division control signal is used for time division control of display and touch control;

[0128] a sending module 23, configured to send the converted display control signal to an LTDI chip, so that the LTDI chip counts the converted display control signal to obtain the required time division control signal.

[0129] In the embodiment of the present application, optionally, the caching module 22 is configured to save the original display control signal corresponding to one frame of image into the cache; and the sending module 23 is configured to send the converted display control signal corresponding to one frame of image to the LTDI chip.

[0130] In the embodiment of the present application, optionally, the sending module 23 is further configured to generate a false time division control signal, wherein one period of the false time division control signal comprises a display area and a blank area, the display area corresponds to a display time of one frame of image, and the blank area corresponds to an interval time between adjacent frames of image; and the sending module 23 is configured to send the converted display control signal corresponding to one frame of image to the LTDI chip in the display area.

[0131] In the embodiment of the present application, optionally, the display area is high level, and the blank area is low level.

[0132] In the embodiment of the present application, optionally, in a case that the period of the required time division control signal can be divided by the period of the original display control signal, the frequency of the converted display control signal is the same as the frequency of the original display control signal;

[0133] and / or

[0134] In a case that the period of the required time division control signal cannot be divided by the period of the original display control signal, the frequency of the converted display control signal is greater than the frequency of the original display control signal.

[0135] Optionally, in the embodiment of the present application, the original display control signal and the converted display control signal are square wave signals with high and low level switching, and one period of the original display control signal and the converted display control signal represents the display time of one row of display data.

[0136] Optionally, in the embodiment of the present application, the original display control signal is an eDP_DE signal, and the converted display control signal is a TCON_DE signal.

[0137] Optionally, in the embodiment of the present application, the required time-sharing control signal is a square wave signal with high and low level switching.

[0138] The high level represents the display time, and the low level represents the touch time.

[0139] Alternatively,

[0140] The high level represents the touch time, and the low level represents the display time.

[0141] Optionally, in the embodiment of the present application, the required time-sharing control signal is matched with the timing of the active pen protocol.

[0142] The embodiment of the present application also provides a display control signal processing system, which comprises a mainboard, a TCON, an external crystal oscillator and an LTDI chip, wherein:

[0143] The mainboard is configured to generate an original display control signal and send the original display control signal to the TCON.

[0144] The TCON is configured to receive the original display control signal sent by the mainboard, save the original display control signal into a cache, convert the original display control signal based on the frequency of the external crystal oscillator as a base frequency to obtain a converted display control signal, and the converted display control signal meets the following conditions: the period of the converted display control signal is stable, the period of a required time-sharing control signal can be divided by the period of the converted display control signal, and the required time-sharing control signal is used for time-sharing control of display and touch.

[0145] The LTDI chip is configured to receive the converted display control signal sent by the TCON, count the converted display control signal to obtain the display time of one frame of image, divide the display time of one frame of image into at least one display time and at least one touch time, and obtain the required time-sharing control signal.

[0146] Optionally, the LTDI chip is an LTDI IC.

[0147] Optionally, the external crystal oscillator is connected with the TCON, and the TCON and the external crystal oscillator are located on a printed circuit board (PCB).

[0148] Optionally, the processing system of the display control signal further comprises an active pen, a protocol timing of the active pen being matched with the required time-sharing control signal.

[0149] The embodiment of the present application further provides a touch display device, comprising the processing system of the display control signal.

[0150] Please refer to Fig. 13, the embodiment of the present application further provides an electronic device 130, comprising a processor 131, a memory 132, a computer program stored in the memory 132 and executable in the processor 131, when the computer program is executed by the processor 131, each process of the embodiment of the display control signal processing method is realized, and the same technical effect is achieved, to avoid repetition, here is no longer tedious.

[0151] The embodiment of the present application further provides a computer readable storage medium, the computer readable storage medium stores a computer program, when the computer program is executed by a processor, each process of the embodiment of the display control signal processing method is realized, and the same technical effect is achieved, to avoid repetition, here is no longer tedious. Wherein, the computer readable storage medium, such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.

[0152] The embodiment of the present application further provides a computer program product, comprising computer instructions, when the computer instructions are executed by a processor, each process of the embodiment of the display control signal processing method shown in Fig. 8 is realized, and the same technical effect is achieved, to avoid repetition, here is no longer tedious.

[0153] It should be noted that in this paper, the term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitation, the element defined by the sentence "including a…" does not exclude the existence of other same elements in the process, method, article or device including the element.

[0154] Those skilled in the art can clearly understand the above-mentioned embodiment method can be realized by means of software and necessary general hardware platform, of course, also can be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application essentially or say the part of contribution to the prior art can be embodied in the form of software product, the computer software product is stored in a storage medium (such as ROM / RAM, disk, optical disk), including a number of instructions to make a terminal (may be a mobile phone, computer, server, air conditioner, or network equipment, etc.) executes the method described in various embodiments of the present application.

[0155] The embodiments of the present application are described above in conjunction with the drawings, but the present application is not limited to the above-mentioned specific embodiments, the above-mentioned specific embodiments are only illustrative, but not restrictive, those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. A method for processing display control signals, characterized in that, include: Receives raw display control signals sent by the motherboard; The original display control signal is saved to the cache; Using the frequency of an external crystal oscillator as the base frequency, the original display control signal is converted to obtain a converted display control signal. The converted display control signal satisfies the following: the period of the converted display control signal is stable, and the period of the required time-division control signal can be divided by the period of the converted display control signal. The required time-division control signal is used for time-division control of display and touch. The converted display control signal is sent to the LTDI chip so that the LTDI chip counts the converted display control signal to obtain the required time-division control signal.

2. The method according to claim 1, characterized in that, Saving the original display control signal to the cache includes: saving the original display control signal corresponding to one frame of image to the cache; Sending the converted display control signal to the LTDI chip includes: sending the converted display control signal corresponding to one frame of image to the LTDI chip.

3. The method according to claim 2, characterized in that, Sending the converted display control signal to the LTDI chip includes: A false time-division control signal is generated, wherein one cycle of the false time-division control signal includes a display area and a blank area, the display area corresponding to the display time of one frame of image, and the blank area corresponding to the interval time between adjacent frames of image; The converted display control signal corresponding to a frame of image is sent to the LTDI chip within the display area.

4. The method according to claim 3, characterized in that, The display area is at a high level, and the blank area is at a low level.

5. The method according to claim 1, characterized in that, If the period of the required time-division control signal is divisible by the period of the original display control signal, the frequency of the converted display control signal is the same as the frequency of the original display control signal. and / or If the period of the required time-division control signal cannot be divided by the period of the original display control signal, the frequency of the converted display control signal is greater than the frequency of the original display control signal.

6. The method according to any one of claims 1-5, characterized in that, Both the original display control signal and the converted display control signal are square wave signals that switch between high and low levels. One cycle of the original display control signal and the converted display control signal represents the display time of one line of display data.

7. The method according to claim 6, characterized in that, The original display control signal is the eDP_DE signal, and the converted display control signal is the TCON_DE signal.

8. The method according to claim 6, characterized in that, The required time-division control signal is a square wave signal that switches between high and low levels; A high level indicates the display time, and a low level indicates the touch time; or, A high level indicates the touch duration, and a low level indicates the display duration.

9. The method according to claim 1, characterized in that, The required time-division control signal is time-matched with the active pen protocol.

10. A processing device for displaying control signals, characterized in that, include: The receiving module is used to receive the raw display control signals sent by the motherboard; External crystal oscillator; A caching module is used to save the original display control signals to a cache. Using the frequency of the external crystal oscillator as the fundamental frequency, the original display control signal is converted to obtain a converted display control signal. The converted display control signal satisfies the following: the period of the converted display control signal is stable, and the period of the required time-division control signal can be divided by the period of the converted display control signal. The required time-division control signal is used for time-division control of display and touch. The transmitting module is used to send the converted display control signal to the LTDI chip, so that the LTDI chip counts the converted display control signal to obtain the required time-division control signal.

11. A system for processing display control signals, characterized in that, This includes the motherboard, TCON, external crystal oscillator, and LTDI chip, among which: The motherboard is used to generate the original display control signal and send the original display control signal to the TCON; The TCON is used to receive the original display control signal sent by the motherboard; save the original display control signal to a cache; and convert the original display control signal using the frequency of the external crystal oscillator as the base frequency to obtain a converted display control signal. The converted display control signal satisfies the following: the period of the converted display control signal is stable, and the period of the required time-division control signal is divisible by the period of the converted display control signal. The required time-division control signal is used for time-division control of display and touch. The LTDI chip is used to receive the converted display control signal sent by the TCON, count the converted display control signal to obtain the display time of a frame of image, and divide the display time of a frame of image into at least one display time and at least one touch time to obtain the required time-division control signal.

12. The system according to claim 11, characterized in that, The LTDI chip is a chip that integrates a source IC, MCU, LS and TMIC.

13. The system according to claim 11, characterized in that, Also includes: An active pen whose protocol timing is matched with the required time-division control signal.

14. A touch display device, characterized in that, The system includes a processing system for display control signals as described in any one of claims 11 to 13.

15. An electronic device, characterized in that, include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method for processing display control signals as described in any one of claims 1 to 9.

16. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method for processing display control signals as described in any one of claims 1 to 9.

17. A computer program product, characterized in that, It includes computer instructions, which, when executed by a processor, implement the steps of the method for processing display control signals as described in any one of claims 1 to 9.

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