Signal conditioning method and display device

Abstract

The present application relates to the technical field of display, especially to a signal adjusting method and display device, the initial signal parameter read from the storage module is output to the driving module, and then the driving module can perform clock data reset detection according to the received initial signal parameter, when the driving module is not locked, it is determined that the driving module cannot correctly identify the signal, and the initial signal parameter needs to be adjusted, the adjustment mode of the initial signal parameter and the adjustment strategy corresponding to the adjustment mode are determined according to different adjustment requirements, and then the initial signal parameter is adjusted to obtain the target signal parameter that can lock the driving module, so that the technical problem that the source driving chip at the edge of the display device in the prior art cannot correctly identify the video signal transmitted by the timing controller, resulting in that the display cannot be normally displayed, is avoided, and the use experience of the user is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a signal adjusting method and display device. BACKGROUND

[0002] At present, the timing controller (TCON) of LCD liquid crystal display is generally arranged in the middle of the display, which results in that the signal transmission path from the TCON to the source IC of the edge is very long, and inevitably there is a large signal attenuation and jitter. With the improvement of resolution and refresh rate, the video signal that the TCON needs to transmit to the source IC in unit time is more and more, and in order to ensure the transmission of the video signal, the rate of data transmission is required to be faster and faster, which causes that the source IC of the display cannot correctly identify the transmitted signal, so that the video signal cannot be correctly displayed, and further affects the user's viewing experience. SUMMARY

[0003] The main purpose of the present application is to provide a signal adjusting method and display device, which aims to solve the technical problem that the source IC at the edge of the display device in the prior art cannot correctly identify the video signal transmitted by the timing controller, resulting in that it cannot be normally displayed.

[0004] In order to achieve the above purpose, the present application provides a signal adjusting method, which is applied to a timing controller module in a display device, the display device comprising a timing controller module, a driving module and a storage module, the timing controller module and the driving module being connected through a differential signal channel, a feedback channel and a bidirectional communication channel for data communication, and the timing controller module and the storage module being connected through a synchronous serial channel.

[0005] The signal adjusting method comprises the following steps:

[0006] reading initial signal parameters stored in the storage module;

[0007] outputting the initial signal parameters to the driving module, and judging the clock and data restorer lock state fed back by the driving module;

[0008] determining the adjustment mode and adjustment strategy of the initial signal parameters when the clock and data restorer lock state is not locked;

[0009] adjusting the initial signal parameters according to the adjustment strategy to obtain target signal parameters.

[0010] Optionally, the adjustment mode comprises a normal mode, and the target signal parameters comprise a first target signal parameter in the normal mode.

[0011] The initial signal parameter is adjusted according to the adjustment strategy to obtain a target signal parameter, including:

[0012] The initial signal parameter is adjusted in its adjustment interval according to a preset adjustment strategy;

[0013] The adjusted initial signal parameter is output to the drive module, and the locking state of the drive module is recorded;

[0014] If it is detected that the drive module meets a preset locking condition, a plurality of signal parameters corresponding to the drive module when it is historically and continuously locked for a preset number of times are obtained, and the preset locking condition is that the number of times of continuous locking of the drive module is greater than the preset number of times;

[0015] A first target signal parameter is determined according to each signal parameter.

[0016] Optionally, the initial signal parameter includes an equalizer gear, a pre-emphasis gear, a swing gear, a differential rate, and a spread spectrum state value;

[0017] The initial signal parameter is adjusted in its adjustment interval according to a preset adjustment strategy, including:

[0018] The equalizer gear is adjusted in its adjustment interval;

[0019] When the drive module does not meet the preset locking condition under each equalizer gear, the equalizer gear and the pre-emphasis gear are respectively adjusted in their adjustment intervals;

[0020] When the drive module still does not meet the preset locking condition under each equalizer gear and each pre-emphasis gear, the equalizer gear, the pre-emphasis gear, and the swing gear are respectively adjusted in their adjustment intervals;

[0021] When the drive module still does not meet the preset locking condition under each equalizer gear, each pre-emphasis gear, and each swing gear, the equalizer gear, the pre-emphasis gear, the swing gear, and the differential rate are respectively adjusted in their adjustment intervals;

[0022] When the drive module still does not meet the preset locking condition under each equalizer gear, each pre-emphasis gear, each swing gear, and each differential rate, the spread spectrum state value is adjusted, and the equalizer gear, the pre-emphasis gear, the swing gear, and the differential rate are respectively adjusted in their adjustment intervals.

[0023] Optionally, the manner of adjusting the swing gear at least includes:

[0024] combining adjustment of the equalizer level, the pre-emphasis level and the swing level within their respective adjustment intervals;

[0025] adjusting the swing level within its adjustment interval by taking the maximum or minimum value of the pre-emphasis level.

[0026] Optionally, the adjustment manner of the differential rate level at least includes:

[0027] reducing the duration of the horizontal blanking period of each frame of data;

[0028] reducing the duration of the vertical blanking period of each frame of data;

[0029] reducing the refresh rate of the display device to reduce the differential rate.

[0030] Optionally, the initial signal parameters include: equalizer level, pre-emphasis level, swing level, differential rate and spread spectrum state value.

[0031] The determination of the first target signal parameters according to the signal parameters includes:

[0032] taking the average of each equalizer level, the average of each pre-emphasis level, the average of each swing level, the average of each differential rate and the current spread spectrum state value as the first target signal parameters.

[0033] Optionally, the adjustment mode includes an interference mode, and the target signal parameters include second target signal parameters in the interference mode.

[0034] The adjustment of the initial signal parameters according to the adjustment strategy to obtain target signal parameters includes:

[0035] traversing the initial signal parameters within their adjustment intervals;

[0036] outputting the traversed signal parameters to the driving module and recording whether the driving module is locked;

[0037] determining the second target signal parameters according to the candidate signal parameters when the driving module is locked.

[0038] Optionally, the determination of the second target signal parameters according to the candidate signal parameters when the driving module is locked includes:

[0039] taking the average of each equalizer level, the minimum value of each pre-emphasis level, the minimum value of each swing level, the minimum value of each differential rate and the current spread spectrum state value when the driving module is locked as the second target signal parameters.

[0040] Optionally, after the initial signal parameter is adjusted according to the adjustment strategy to obtain the target signal parameter, the method further comprises:

[0041] The target signal parameter is sent to the driving module, so that the driving module displays a picture according to the target signal parameter.

[0042] The initial signal parameter stored in the storage module is updated according to the target signal parameter.

[0043] To achieve the above object, the application further provides a display device, which comprises a timing controller module, a driving module and a storage module, wherein the timing controller module applies the signal adjustment method as described above.

[0044] In the application, the initial signal parameter stored in the storage module is read and output to the driving module, so that the driving module can perform clock data reset detection according to the received initial signal parameter and feed back the result of the clock data reset through a bidirectional communication channel. When the driving module is not locked, it is determined that the driving module cannot correctly identify the signal and the initial signal parameter needs to be adjusted. At this time, the adjustment mode of the initial signal parameter and the adjustment strategy corresponding to the adjustment mode are determined according to different adjustment requirements, and then the initial signal parameter can be adjusted according to the adjustment strategy to obtain the target signal parameter that can lock the driving module. The technical problem that the source driving chip at the edge of the display device in the prior art cannot correctly identify the video signal transmitted by the timing controller, resulting in failure to display normally, is avoided, and the user's use experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0046] Figure 1 Flowchart of the first embodiment of the signal adjustment method of the application;

[0047] Figure 2 Structure diagram of the display device of one embodiment of the signal adjustment method of the application;

[0048] Figure 3 Data transmission diagram of one embodiment of the signal adjustment method of the application;

[0049] Figure 4Pin level-gear diagram of the equalizer for an embodiment of the signal adjusting method of the present application;

[0050] Figure 5 Module connection diagram of the display device for an embodiment of the signal adjusting method of the present application;

[0051] Figure 6 Automatic adjusting flow diagram for an embodiment of the signal adjusting method of the present application;

[0052] Figure 7 Flow diagram for a second embodiment of the signal adjusting method of the present application;

[0053] Figure 8 Signal parameter adjusting flow diagram in normal mode for an embodiment of the signal adjusting method of the present application;

[0054] Figure 9 Flow diagram for a first swing-gear adjusting mode for an embodiment of the signal adjusting method of the present application;

[0055] Figure 10 Flow diagram for a second swing-gear adjusting mode for an embodiment of the signal adjusting method of the present application;

[0056] Figure 11 Flow diagram for a differential rate adjusting mode for an embodiment of the signal adjusting method of the present application;

[0057] Figure 12 Flow diagram for a third embodiment of the signal adjusting method of the present application;

[0058] Figure 13 Signal parameter adjusting flow diagram in interference mode for an embodiment of the signal adjusting method of the present application;

[0059] Figure 14 Structure diagram of a display device for an embodiment of the present application.

[0060] Brief Description of the Drawings

[0061] Reference Name Reference Name A1 Timing control module A23 Digital-to-analog converter A2 Drive module A24 Data latch A3 Printed circuit board A25 Shift register A4 Display A26 Logic controller A5 Storage module 1 Display device A11 Signal sending end 11 Driver A21 Signal receiving end 12 Display panel A22 Output buffer

[0062] The implementation, functional features and advantages of the present application will be further explained with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0063] It should be understood that the specific embodiments described herein merely exemplify the application and do not limit the application.

[0064] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0065] It should be noted that all the direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the direction indications also change accordingly.

[0066] In addition, the descriptions of “first”, “second” and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features. Therefore, the features defined with “first”, “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person of ordinary skill in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is also not within the protection scope of the present application.

[0067] Embodiment one

[0068] With reference to Figure 1 , Figure 1 The flowchart of the first embodiment of the signal adjusting method of the present application. The first embodiment of the signal adjusting method is proposed in the present application.

[0069] In the present embodiment, the signal adjusting method is applied to the timing controller module in the display device, and the signal adjusting method comprises:

[0070] Step S10: reading the initial signal parameters stored in the storage module.

[0071] It should be noted that the execution subject of the embodiment is a timing controller module in a display device, which is usually a main controller in a liquid crystal display device, for example, a data processing chip of a controller of a television set. The display device at least has a display panel, a timing control and data processing chip (Timing Controller, TCON), a signal source (SOC), and a driver (Driver IC), and can also have other related components, such as a non-volatile flash memory (Flash). The display device adopts Freesync display frequency conversion technology to realize dynamic refresh rate. The display device is provided with a display signal adjustment program. By running the signal adjustment program, the differential signal is compensated to improve the signal transmission quality affected by the environment and unable to meet the use requirements.

[0072] It can be understood that, with reference to Figure 2 , Figure 2 is a structural schematic diagram of a display device. 01 refers to a timing controller (TCON), 02 refers to a source IC (also directly referred to as a driver chip), 03 refers to a printed circuit board (PCB), and 04 refers to a display. In a traditional display, the timing controller (TCON) is generally arranged in the middle of the display (in the horizontal direction, in the middle), and the source IC is uniformly distributed at the bottom of the display (in the vertical direction, at the bottom). Compared with the source IC of the timing controller close to the middle, the source IC at the edge receives the video signal for a longer time and is more likely to have large signal attenuation and jitter. Especially when transmitting high-frequency video data, the transmitted data signal amplitude is smaller, the signal transmission rate is faster, the period is smaller, and the single signal duration is short. At this time, some source ICs at the edge may not be able to correctly identify the transmitted signal.

[0073] In the traditional technology, in order to solve the problem, with reference to Figure 3 , a equalizer is generally arranged in the driving module. After the equalizer receives the signal, the signal is compensated first, and then the compensated signal is transmitted to the buffer amplifier of the receiving end of the driving module. Then, the clock and data restorer decodes the amplified signal to determine whether the differential signal can be locked. If the clock and data restorer can lock the differential signal, it means that the source IC successfully identifies the received signal, and normal display can be realized. A lock signal is generated and fed back to the timing controller module.

[0074] In Figure 3In the specific step of receiving the differential signal, the driving module sequentially passes the differential signal through a printed circuit board (PCB), a flexible flat cable (FFC), a printed circuit board, a flexible printed circuit (FPC), a printed circuit board, and a chip on flex (COF) or chip on film (COF) from a signal transmitting end A11 (TX) of the timing controller module to a signal receiving end A21 (TX) of the driving module to perform compensation, amplification, clock and data recovery, and the like.

[0075] In addition, during the display of the display device, the driving module further includes a logic controller A26, a shift register A25, data latches A24, a digital to analog converter A23 (DAC), and an output buffer A22. The logic controller A26 is configured to output a control signal to the shift register A25. The shift register A25 is configured to adjust the transmission direction of data under the action of the control signal. The data latches A24 are configured to sample and register the input data, and also configured to transfer the registered signal, i.e., one row of data signals, to the digital to analog converter A23. The digital to analog converter A23 is configured to convert the digital data signal into a corresponding analog gray scale voltage data signal. The output buffer A22 is configured to improve the low-band load capability of the analog voltage output by the digital to analog converter A23 into high-band load capability analog voltage. Figure 3 In the specific implementation, EQ0, EQ1, EQ2, and EQ3 refer to the interfaces of the equalizer. According to the high / low level combination of different interfaces, the adjustment of the EQ gear can be realized.

[0076] In the specific implementation, when the equalizer performs compensation, different compensation parameters are defined as different gears of the equalizer, for example, the DC gain, zero frequency, and pole frequency of the ADC on the source IC, and the like. In the specific application, different equalizer (EQ) gears are selected according to the signal attenuation. However, the control of the equalizer gear is generally realized by adjusting the input level (high level or low level) of the equalizer interface of the timing controller module to set the equalizer gear. This method cannot meet the compensation requirement of the driving module signal when facing high-frequency data transmission and signal attenuation or environmental temperature and humidity change, which leads to the failure of the driving module to lock, and further leads to the failure of the display to operate normally.

[0077] In order to realize the adjustment of the equalizer gear, the level of each interface of the equalizer is adjusted by the timing controller module in the embodiment, so as to control the gear of the equalizer. The corresponding relationship between the level of each interface of the equalizer and the gear of the equalizer can be referred to in the description of the embodiment Figure 4 , Figure 4 , where L represents low level, which can be realized by grounding, and H represents high level, which can be realized by the high level of the logic circuit, and H is generally digital direct-current high level. The relationship between the gear of the equalizer and each interface can be a binary relationship. L is recorded as 0, and H is recorded as 1. The final gear of the equalizer is determined according to the values of the EQ0, EQ1, EQ2 and EQ3 interfaces. For example, if the EQ0, EQ1, EQ2 and EQ3 interfaces of the equalizer are all grounded, the corresponding interface value is 0000, which indicates that the gear of the equalizer is 0. If the EQ0, EQ1, EQ2 and EQ3 interfaces of the equalizer are all connected to the direct-current high level, the corresponding interface value is 1111, which indicates that the gear of the equalizer is 15. Meanwhile, in order to facilitate the description, the source IC will be replaced by the driving module in the description of the embodiment and the following embodiments.

[0078] It should be noted that the initial signal parameters stored in the storage module include but are not limited to the differential signal parameters and the equalizer gear. The differential signal parameters include the pre-emphasis gear, the swing gear, the differential rate and the spread spectrum state value. The spread spectrum state value can be 1 or 0, which respectively represents the two states of turning on the spread spectrum and turning off the spread spectrum. The above-mentioned initial signal parameters are transmitted through the synchronous serial channel (SPI, Serial Peripheral Interface) between the timing controller module and the storage module.

[0079] In the embodiment, the timing controller module and the driving module communicate with each other through the differential signal channel, the feedback channel and the bidirectional communication channel. The timing controller module and the storage module are connected through the synchronous serial channel. Figure 5

[0080] Step S20: outputting the initial signal parameters to the driving module and judging the clock and data restorer lock state fed back by the driving module.

[0081] ​It is worth mentioning that after the display is powered on, the timing controller module reads the last saved equalizer position, pre-emphasis position, swing position, differential rate and spread spectrum state value in the storage module, and then the timing controller module configures the pre-emphasis position, swing position, differential rate and spread spectrum state value to the register of the timing controller module, and combines with the video signal sent from the front end to control the speed, brightness and the like of the video signal display. At the same time, the equalizer position is output to the driving module through the bidirectional communication channel between the timing controller module and the driving module to change the equalizer position to the same position as the last display. Then the generated video signal is sent to the driving module through the differential channel. At this time, the driving module can detect whether the clock and data recovery lock state can be locked according to the received video signal combined with the equalizer position. If the eye diagram of the differential signal meets the standard of picture display, the driving module can be locked, and then the display screen can be normally displayed. The driving module can feed back the lock signal to the timing controller module through the feedback channel, and the timing controller module can save the differential signal and equalizer position at the time of normal display for the next use. If it does not meet the standard, the clock and data recovery in the driving module cannot be locked, and the driving module can feed back the unlock signal to the timing controller module through the feedback channel, so as to automatically adjust the differential signal and the equalizer position.

[0082] Step S30: When the clock and data recovery lock state is not locked, the adjustment mode and adjustment strategy of the initial signal parameter are determined.

[0083] In a specific implementation, with reference to Figure 6 , Figure 6 The automatic adjustment flowchart of the embodiment is shown in FIG. 3. If the lock state of the clock and data recovery in the driving module is locked, the picture or video can be normally displayed. If the clock and data recovery cannot be locked, the driving module can feed back the unlock signal to the timing controller module through the feedback channel, and then the timing controller module starts the automatic adjustment to adjust the differential signal and the equalizer position, so that the clock and data recovery in the driving module can be locked, and the picture or video can be normally displayed.

[0084] In the embodiment, the adjustment mode includes a normal mode and an interference mode. The interference mode refers to the adjustment mode under electromagnetic interference (EMI). In the two modes, the adjustment of the initial signal can be performed according to the order of the equalizer position, the pre-emphasis position, the swing position, the differential rate and the spread spectrum state value. In the adjustment process, only one position or variable is adjusted at a time. The driving module can detect whether the clock and data recovery can be locked according to the updated signal parameter once every time a variable is adjusted.

[0085] In a specific implementation, the normal mode and the interference mode can also be determined by a control signal sent by an external device, wherein the external device can be a device with data transmission and data processing, such as a remote controller or a control button, and the normal mode adjustment can ensure the best signal transmission quality, and the EMI mode adjustment can minimize electromagnetic interference on the basis of normal display.

[0086] It should be understood that different adjustment modes have different signal parameter adjustment strategies. For example, in the normal mode, first, the equalizer gear is adjusted. If the initial gear of the equalizer is 1, the equalizer gear is adjusted to 2 in the next time, and other signal parameters remain unchanged. If the driving module is still not locked at this time, the equalizer gear is adjusted to 3, and other signal parameters remain unchanged. Until all equalizer gears cannot make the driving module lock, the equalizer gear is restored to the initial gear 1, the pre-emphasis gear is adjusted. If the pre-emphasis gear is in its interval, and the equalizer gear is 1, the driving module cannot lock, the equalizer gear is adjusted to 2, and the pre-emphasis gear is adjusted in its adjustment interval, until the driving module is locked for three times in succession or all signal parameters are adjusted.

[0087] Step S40: adjusting the initial signal parameters according to the adjustment strategy to obtain target signal parameters.

[0088] In a specific implementation, in the normal mode, the determination condition for ending the differential signal parameter adjustment or the equalizer adjustment can be that the driving module is locked for three times in succession. At this time, the unadjusted signal parameters remain unchanged, and the adjusted signal parameters take the average value as the target signal parameters. In the interference mode, the judgment of the clock and data recovery module lock of all combinations of the equalizer gear, the pre-emphasis gear, the swing gear, the differential rate and the spread spectrum state value is completed, and the driving module clock and data recovery module lock state corresponding to all parameter combinations is recorded. Finally, the minimum value of the equalizer gear, the pre-emphasis gear, the swing gear and the differential rate is taken as the adjusted signal parameter.

[0089] In addition, in the normal mode, if all combinations of the equalizer gear, the pre-emphasis gear, the swing gear, the differential rate and the spread spectrum state value do not lock for three times in succession, it is generally determined that the display hardware device is damaged, and the signal adjustment process is directly exited.

[0090] Further, after the target signal parameters are determined, the target signal parameters can be sent to the driving module, so that the driving module displays the picture according to the target signal parameters; and the initial signal parameters stored in the storage module are updated according to the target signal parameters, so that the display screen can be directly called next time when powered on.

[0091] The embodiment reads the initial signal parameters stored in the storage module, and outputs the read initial signal parameters to the driving module. Then, the driving module can perform clock data reset detection according to the received initial signal parameters, and feed back the clock data reset result through the bidirectional communication channel. When the driving module is not locked, it is determined that the driving module cannot correctly identify the signal, and the initial signal parameters need to be adjusted. At this time, the adjustment mode of the initial signal parameters and the adjustment strategy corresponding to the adjustment mode are determined according to different adjustment requirements. Then, the target signal parameters that can lock the driving module are obtained by adjusting the initial signal parameters according to the adjustment strategy, thereby avoiding the technical problem that the source driving chip at the edge of the display device in the prior art cannot correctly identify the video signal transmitted by the timing controller, resulting in that the display cannot be normal, and improving the user's use experience.

[0092] Embodiment two

[0093] Reference Figure 7 , Figure 7 The flowchart of the second embodiment of the signal adjustment method of the application is shown. Based on the first embodiment, the second embodiment of the signal adjustment method is proposed.

[0094] In the embodiment, the adjustment mode is a conventional mode, step S40, comprising:

[0095] Step S401: adjusting the initial signal parameters in their adjustment intervals according to the preset adjustment strategy.

[0096] It should be noted that the preset adjustment strategy in the conventional mode means adjusting in the order of equalizer position, pre-emphasis position, swing position, differential rate and spread spectrum state value. At the same time, the equalizer position, pre-emphasis position or swing position is adjusted based on the initial position, and the equalizer position, pre-emphasis position or swing position is reset to 0 when the position increases to the maximum value of the corresponding adjustment interval, and then continues to increase until all positions of the equalizer position, pre-emphasis position or swing position in the corresponding adjustment interval are adjusted, and the driving module does not meet the preset locking condition. Figure 8

[0097] Further, the adjusting the initial signal parameters in their adjustment intervals according to the preset adjustment strategy comprises:

[0098] adjusting the equalizer position in its adjustment interval;​

[0099] When the driving module does not meet the preset locking condition in each equalizer gear, the equalizer gear and the pre-emphasis gear are adjusted in their respective adjustment intervals;

[0100] When the driving module still does not meet the preset locking condition in each equalizer gear, each pre-emphasis gear, and each swing gear, the equalizer gear, the pre-emphasis gear, and the swing gear are adjusted in their respective adjustment intervals;

[0101] When the driving module still does not meet the preset locking condition in each equalizer gear, each pre-emphasis gear, each swing gear, and each differential rate, the equalizer gear, the pre-emphasis gear, the swing gear, and the differential rate are adjusted in their respective adjustment intervals;

[0102] When the driving module still does not meet the preset locking condition in each equalizer gear, each pre-emphasis gear, each swing gear, and each differential rate, the equalizer gear, the pre-emphasis gear, the swing gear, and the differential rate are adjusted in their respective adjustment intervals.

[0103] For example, the initial gear of the equalizer is 3, and the adjustment gear interval is [0-5]. First, the equalizer gear is controlled to increase from 3 to 5. If the clock and data recovery device in the driving module is not locked for three times in succession, the equalizer gear is reset to 0 and increased to 2. In this process, the equalizer gear 5 jumps to 0 and is continuously adjusted. If the clock and data recovery device in the driving module is not locked for three times in succession during the adjustment process of all equalizer gears, the equalizer can be restored to 3, and the pre-emphasis gear is controlled to be adjusted based on the initial gear in its adjustment interval. If the clock and data recovery device in the driving module is not locked for three times in succession during the adjustment process of all pre-emphasis gears when the equalizer gear is 3, the equalizer gear can be increased, i.e., the equalizer is increased to 4, and the pre-emphasis gear is controlled to be adjusted based on the initial gear in its adjustment interval. Then, it is detected whether the clock and data recovery device in the driving module is locked for three times in succession.

[0104] It can be understood that the preset locking condition refers to that the clock and data recovery device in the driving module is locked for three times in succession, i.e., in the conventional mode, if the clock and data recovery device is locked for three times in succession during the adjustment of the signal parameters, it indicates that the video signal can be normally displayed. The reason for setting the three times of locking is to leave a margin of one gear above and below, to avoid the influence of environmental factors, so that the differential signal parameters or the equalizer gear are not matched in a small range, and thus the normal display is affected.

[0105] In a specific implementation, first, in all equalizer positions, it is determined whether the clock and data recovery device is locked for three times continuously, if not, the adjustment of the pre-emphasis position is increased, and then it is determined whether the clock and data recovery device is locked for three times continuously, if not, the adjustment of the swing position is increased on the basis of the equalizer position and the pre-emphasis position, wherein there are at least two ways to adjust the swing position: 1. Referring to Figure 9 , the position is gradually increased based on the initial swing position, when the swing position is equal to the maximum position, the swing position is adjusted to 0, and the position is continuously increased until all swing positions are adjusted and more than three times of the clock and data recovery device is not detected to be locked; 2. Referring to Figure 10 , the maximum position or the minimum position of the pre-emphasis is taken, and the swing position is adjusted in the corresponding adjustment interval, and it is detected whether the clock and data recovery device is locked for more than three times, in the swing position adjustment process, the second way is faster and more efficient than the first way, but the first adjustment way is more accurate.

[0106] Referring to Figure 11 , if more than three times of the clock and data recovery device is not locked after the adjustment of the equalizer position, the pre-emphasis position and the swing position, the rate of the differential signal can be reduced, and there are at least three ways to reduce the rate of the differential signal: 1. Reducing the duration of the horizontal blanking period of each frame of data transmitted by the timing control module to the driving module; 2. Reducing the duration of the vertical blanking period of each frame of data transmitted by the timing control module to the driving module; 3. Reducing the refresh rate of the display device to reduce the differential rate.

[0107] Step S402: output the adjusted initial signal parameter to the driving module, and record the locking state of the driving module.

[0108] Step S403: if it is detected that the driving module meets the preset locking condition, a plurality of signal parameters corresponding to the historical continuous locking of the driving module for a preset number of times are obtained, and the preset locking condition is that the number of continuous lockings of the driving module is greater than the preset number of times.

[0109] It can be understood that the preset number of times can be set to 3, that is, in the normal mode, after the driving module is locked for three times, the signal adjustment process is exited, and the equalizer position, the pre-emphasis position, the swing position, the differential rate and the current spread spectrum state value received by the driving module at the three times of locking are obtained, so as to determine the best equalizer position, the pre-emphasis position, the swing position, the differential rate and the current spread spectrum state value, thereby achieving the best display effect.

[0110] Step S404: determining a first target signal parameter according to each signal parameter.

[0111] In a specific implementation, in the normal mode, the average of each equalizer tap, the average of each pre-emphasis tap, the average of each swing tap, the average of each differential rate, and the current spread spectrum state value when the driving module is locked for three times in succession can be taken as the first target signal parameter, and the signal parameter stored in the storage module is updated according to the average of each equalizer tap, the average of each pre-emphasis tap, the average of each swing tap, the average of each differential rate, and the current spread spectrum state value, so as to display next time the power is turned on.

[0112] The embodiment adjusts the equalizer tap, the pre-emphasis tap, the swing tap, the average of the differential rate, and the spread spectrum state value according to the corresponding parameter adjustment strategy in the normal mode, so as to obtain the equalizer tap, the pre-emphasis tap, the swing tap, the average of the differential rate, and the spread spectrum state value that can make the clock and data recovery device in the driving module be locked for three times in succession, and then obtain the differential signal parameter and the equalizer tap that can obtain the best display effect, improve the display effect of the display screen, and improve the user experience.

[0113] Embodiment Three

[0114] Reference Figure 12 , Figure 12 The figure is a flowchart of a third embodiment of a signal adjustment method of the application. Based on the first embodiment, the third embodiment of the signal adjustment method is provided.

[0115] In the embodiment, the adjustment mode is the interference mode, and step S40 further includes:

[0116] Step S401`: the initial signal parameter is traversed in its adjustment interval.

[0117] It should be noted that, with reference to Figure 13 In the interference mode (i.e. the EMI mode), adjusting the initial signal parameter can be combining the equalizer tap, the pre-emphasis tap, the swing tap, the average of the differential rate, and the spread spectrum state value, and sending each combination to the driving module in turn to verify whether the clock and data recovery device in the driving module is locked, and the order of sending the signal parameter combination to the driving module can be according to the adjustment order of the equalizer tap, the pre-emphasis tap, the swing tap, the average of the differential rate, and the spread spectrum state value, so as to ensure that each tap is tested.

[0118] Step S402`: the traversed signal parameter is output to the driving module, and whether the driving module is locked is recorded.

[0119] Step S403`: the second target signal parameter is determined according to the candidate signal parameter when the driving module is locked.

[0120] It is worth mentioning that the to-be-selected signal parameters refer to the combination of the equalizer tap, the pre-emphasis tap, the swing tap, the differential rate average and the spread spectrum state value when the clock and data recovery device in the driving module is locked.

[0121] The second target signal parameters refer to the average of each equalizer tap, the minimum value of each pre-emphasis tap, the minimum value of each swing tap, the minimum value of each differential rate and the current spread spectrum state value when the driving module is locked.

[0122] In a specific implementation, if there are three consecutive times when the driving module is locked, the average of the equalizer tap of the three times is taken as the optimal equalizer tap, the minimum value of the pre-emphasis tap of the three times is taken as the optimal pre-emphasis tap, the minimum value of the swing tap of the three times is taken as the optimal swing tap, the minimum value of the differential rate of the three times is taken as the optimal differential rate, and the current spread spectrum state value is taken as the optimal spread spectrum state value.

[0123] The embodiment tests the clock and data recovery device in the driving module by sending the combination of the equalizer tap, the pre-emphasis tap, the swing tap, the differential rate average and the spread spectrum state value to the driving module in the interference mode, and then obtains the differential signal parameters and the equalizer tap when all the driving modules are locked, thereby improving the display effect of the display screen and improving the user experience.

[0124] Reference Figure 14 , Figure 14 The figure is a structural schematic diagram of an embodiment of the display device. To achieve the above-mentioned purpose, the application further provides a display device 1, which comprises a driver 11 and a display panel 12, wherein the driver 11 is arranged in the non-effective display area of the display panel, and a signal adjustment program is configured to implement the above-mentioned embodiments. Since the display device 1 can adopt the technical solutions of all the above-mentioned embodiments, it at least has the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and thus will not be described here.

[0125] The above are only preferred embodiments of the application, and do not limit the patent scope of the application, and any equivalent structure or equivalent flow transformation made by using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A signal conditioning method applied to a timing controller module in a display device, the display device comprising a timing controller module, a driving module and a storage module, the signal conditioning method comprising: The time sequence controller module and the driving module communicate data through a differential signal channel, a feedback channel and a bidirectional communication channel, and the time sequence controller module and the storage module are connected through a synchronous serial channel; The signal adjustment method comprises: reading initial signal parameters stored in the storage module, wherein the initial signal parameters comprise equalizer taps, pre-emphasis taps, swing taps, differential rates and spread spectrum state values; outputting the initial signal parameters to the driving module and judging a clock and data recovery lock state fed back by the driving module; when the clock and data recovery lock state is not locked, determining an adjustment mode and an adjustment strategy of the initial signal parameters; adjusting the initial signal parameters according to the adjustment strategy to obtain target signal parameters, wherein the target signal parameters comprise second target signal parameters in an interference mode; the adjustment mode comprises a normal mode, and the target signal parameters comprise first target signal parameters in the normal mode; the adjustment strategy comprises a preset adjustment strategy. adjusting the initial signal parameters in their adjustment intervals according to the preset adjustment strategy; outputting the adjusted initial signal parameters to the driving module and recording a lock state of the driving module; 2. The signal conditioning method of claim 1, wherein, if it is detected that the driving module meets a preset lock condition, obtaining a plurality of signal parameters corresponding to the driving module when the driving module is historically and continuously locked for a preset number of times, wherein the preset lock condition is that the number of times that the driving module is continuously locked is greater than the preset number of times; determining first target signal parameters according to the plurality of signal parameters. the adjustment strategy comprises a preset adjustment strategy. adjusting the equalizer taps in their adjustment intervals; when the driving module does not meet the preset lock condition under each equalizer tap, adjusting the equalizer taps and the pre-emphasis taps in their adjustment intervals respectively; when the driving module still does not meet the preset lock condition under each equalizer tap and each pre-emphasis tap, adjusting the equalizer taps, the pre-emphasis taps and the swing taps in their adjustment intervals respectively; 3. The signal conditioning method of claim 2, wherein, when the driving module still does not meet the preset lock condition under each equalizer tap, each pre-emphasis tap and each swing tap, adjusting the equalizer taps, the pre-emphasis taps, the swing taps and the differential rates in their adjustment intervals respectively. ​ ​ ​ ​ When the driving module still does not meet the preset locking condition under each equalizer gear, each pre-emphasis gear, each swing gear and each differential rate, the spread spectrum state value is adjusted, and the equalizer gear, the pre-emphasis gear, the swing gear and the differential rate are respectively adjusted in the adjustment interval.

4. The signal conditioning method of claim 3, wherein, The adjustment of the swing gear includes at least: The equalizer gear, the pre-emphasis gear and the swing gear are respectively adjusted in the adjustment interval; The swing gear is adjusted in the adjustment interval by taking the maximum value or the minimum value of the pre-emphasis gear.

5. The signal conditioning method of claim 3, wherein, The adjustment of the differential rate gear includes at least one of the following: The duration of the horizontal blanking period of each frame of data is reduced; The duration of the vertical blanking period of each frame of data is reduced; The refresh rate of the display device is reduced to reduce the differential rate.

6. The signal conditioning method of claim 2, wherein, The initial signal parameters include: equalizer gears, pre-emphasis gears, swing gears, differential rates and spread spectrum state values; The determination of the first target signal parameters according to each signal parameter includes: Each equalizer gear average, each pre-emphasis gear average, each swing gear average, each differential rate average and the current spread spectrum state value are taken as the first target signal parameters.

7. The signal conditioning method of any one of claims 1-6, wherein, After the initial signal parameters are adjusted according to the adjustment strategy to obtain the target signal parameters, the method further includes: The target signal parameters are sent to the driving module, so that the driving module displays pictures according to the target signal parameters; The initial signal parameters stored in the storage module are updated according to the target signal parameters.

8. A display device comprising a driver and a display panel, the driver being provided in a non-active display area of the display panel, characterized in that, The driver is the signal adjustment method of any one of claims 1-7.

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