Driving device and display device

Abstract

The application provides a driving device and a display device, and belongs to the technical field of display. The driving device is used for a display panel, and the display panel comprises a plurality of sub-pixels arranged in a matrix. The driving device comprises: a scanning driving unit configured to output a scanning signal, the scanning signal enabling at least one row of sub-pixels to be turned on multiple times within a frame period; and a data driving unit configured to output a data signal, the data driving unit transmitting corresponding data signals to the sub-pixels within the multiple turning-on stages of at least one row of sub-pixels within a frame period, so that the sub-pixels emit light at least once, and adjacent sub-pixels in the same row emit light at different times. The driving device can effectively improve the problem of band-shaped dark lines when a camera is used for shooting.

Description

TECHNICAL FIELD

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

[0002] With the development of small pitch in display technology, the row driving of Light Emitting Diode (LED) display screen has higher requirements. From the realization of row switching by Power Metal-Oxide-Semicondutor Field-Effect Transistor (P-MOSFET) to the multi-functional row driving with higher integration and stronger function.

[0003] At present, since the LED display screen is usually driven by Pulse Width Modulation (PWM) mode, the LED is only lit when scanning and is in the off state when not scanning, so that dark field is easily generated. Therefore, in the case of shooting the LED display screen by a camera, the image obtained by shooting is prone to appear band-shaped dark lines. SUMMARY

[0004] The present application provides a driving device and display equipment, aiming to solve the problem that the image obtained by shooting the LED display panel in the prior art is prone to appear band-shaped dark lines.

[0005] To solve the above technical problems, the first technical solution provided by the present application is to provide a driving device. The driving device is used for a display panel, and the display panel includes a plurality of sub-pixels arranged in a matrix. The driving device includes:

[0006] a scan driving unit, configured to output a scan signal; the scan signal makes at least one row of sub-pixels open multiple times within a frame period;

[0007] a data driving unit, configured to output a data signal; within a frame period, the data driving unit transmits a corresponding data signal to the sub-pixels during the multiple opening stages of at least one row of sub-pixels, so that the sub-pixels emit light at least once, and adjacent sub-pixels in the same row emit light at different times.

[0008] In some embodiments, for the same sub-pixel, the opening time at which the data driving unit transmits the valid data signal in the current frame period, the opening time at which the data driving unit transmits the valid data signal in the previous frame period, and the opening time at which the data driving unit transmits the valid data signal in the next frame period are different.

[0009] In some embodiments, the scan signal makes at least one row of sub-pixels open N times within a frame period, and N is an integer greater than 2.

[0010] From the first frame to the Nth frame, for the same sub-pixel, the data driving unit transmits the corresponding effective data signal in different opening times according to a preset sequence rule; the preset sequence rule is an order arrangement rule of the opening times, and the sequence rule takes N frames as a cycle period.

[0011] In some embodiments, along the row direction of the matrix, in each row of sub-pixels, N sub-pixels that are sequentially adjacent are taken as a group; in at least one row of sub-pixels that are turned on in a frame period, the data driving unit transmits the corresponding effective data signal to different sub-pixels in each group in different opening times; and in each group of sub-pixels, the opening times of the sub-pixels transmit the corresponding effective data signal according to a preset arrangement rule.

[0012] In some embodiments, the data driving unit comprises a timing controller, a multiplexer, and a memory;

[0013] The control end of the timing controller is electrically connected to the control end of the multiplexer, so as to control the conduction channel of the multiplexer;

[0014] A plurality of memories are respectively electrically connected to a plurality of input ends of the multiplexer, for providing data signals to the multiplexer; the number of the input ends of the multiplexer is the same as the number of the opening times of at least one row of sub-pixels;

[0015] The output end of the multiplexer is electrically connected to the sub-pixels of the corresponding column, for transmitting the corresponding data signal to the corresponding sub-pixel.

[0016] In some embodiments, in a frame period, the timing controller transmits a gating control signal to the multiplexer;

[0017] The multiplexer turns on the corresponding input end and output end according to the gating control signal, so as to transmit the corresponding data signal in the corresponding memory to the sub-pixel, so that the sub-pixel emits light in the corresponding opening time.

[0018] In some embodiments, the timing controller sequentially transmits the corresponding gating control signal to the multiplexer according to a preset sequence rule, so as to sequentially control the multiplexer to turn on the corresponding input end and output end, so that the multiplexer sequentially transmits the corresponding data signal to the sub-pixel, so that the sub-pixel emits light in the corresponding opening time; wherein the preset sequence rule is an order arrangement rule of the opening times, and the preset sequence rule takes N frames as a cycle period.

[0019] In some embodiments, the N multiplexers are grouped in a set; and the timing controller transmits a corresponding gating control signal to each of the N multiplexers in the set according to a preset arrangement rule in a frame period, so that the arrangement order of the on-paths of the N multiplexers in each set is the same as that of the on-paths of the N multiplexers in other sets.

[0020] In some embodiments, the data signal is a pulse width signal; in a frame period, the plurality of memories electrically connected to the same multiplexer respectively store pulse width signals corresponding to the number of times of turning on, and the pulse widths of the pulse width signals are the same; and the gating control signal is a binary digital signal.

[0021] To solve the above technical problems, a second technical solution provided by the present application is to provide a display device. The display device comprises:

[0022] The display panel comprises a plurality of sub-pixels arranged in a matrix.

[0023] The driving device is electrically connected to the display panel and is configured to drive the plurality of sub-pixels to display a picture; the driving device is the driving device provided in the above technical solution.

[0024] The present application has the following beneficial effects: Different from the prior art, the present application provides a driving device and a display device, the driving device being configured to drive a display panel to display a picture. The display panel comprises a plurality of sub-pixels arranged in a matrix. The driving device comprises a scan driving unit and a data driving unit; the scan driving unit is configured to output a scan signal to make a pixel row turn on according to a scan timing, and the data driving unit is configured to output a data signal to make a sub-pixel in the pixel row emit light. In the present application, the scan signal is configured to make at least one row of sub-pixels turn on multiple times in a frame period, and the data driving unit is configured to transmit a corresponding data signal to each sub-pixel in each of the multiple turning-on stages, so that the sub-pixel emits light at least once. In addition, the present application is configured to make adjacent sub-pixels in a row emit light at different times, so that the specific light-emitting time of adjacent sub-pixels in a pixel row that is turned on is different in a frame stage, and the consistency of the light-emitting time and the extinguishing time point of adjacent sub-pixels is destroyed. Therefore, when a camera is used to take a picture of the display panel, the uniformity of the band-shaped dark lines that are prone to occur is disrupted, the occurrence of the band-shaped dark lines is inhibited, and thus the band-shaped dark lines are not easy to be observed, effectively improving the phenomenon of band-shaped dark lines in the image obtained by the camera. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 is a structural schematic diagram of a display device provided by an embodiment of the prior art;

[0027] Figure 2 yes Figure 1 A partial timing diagram of the scanning signal and the data signal of the display device;

[0028] Figure 3 This is a waveform diagram of the grayscale and grayscale clock relationship provided by an embodiment of the prior art;

[0029] Figure 4 This is a working framework diagram of a brightness correction system provided by an embodiment of the prior art;

[0030] Figure 5 is a grayscale image of a picture captured by a camera provided in an embodiment of the prior art;

[0031] Figure 6 This is a partial timing diagram of grayscale clock and data signals provided by an embodiment of the prior art;

[0032] Figure 7 is a structural diagram of a display device provided in the first embodiment of the present application;

[0033] Figure 8 yes Figure 7 A partial timing diagram provided by an embodiment of a mid-grayscale signal and a data signal;

[0034] Figure 9 yes Figure 7 Another embodiment of the middle grayscale signal and the data signal provides a specific timing diagram;

[0035] Figure 10 is a schematic structural diagram of a display device provided in a second embodiment of the present application;

[0036] Figure 11 This is a correspondence table between the gating control signal and the conduction path provided in an embodiment of the present application.

[0037] Reference numerals:

[0038] 100 - display panel; 10 - sub-pixel; 200 - driving device; 20 - row driving unit; 30 - column driving unit; 31 - timing controller; 32 - multiplexer; 33 - memory;

[0039] Scan(G1~Gn)-scan line; Data(D1~Dm)-data line; GCLK-gray scale clock; F-a frame period; F(x-1)-previous frame period; F(x)-current frame period; F(x+1)-next frame period; Sic(S1~Sm)-strobe control signal. DETAILED DESCRIPTION

[0040] The scheme of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0041] In the following description, specific details are set forth in order to provide a thorough understanding of the present application. However, persons having ordinary skill in the art will appreciate that the present application can be practiced without the specific details.

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only 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 other embodiments obtained by persons having ordinary skill in the art without creative effort fall within the scope of the present application.

[0043] The terms "first", "second", "third" in the present application are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically limited. All directional 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 the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0044] Reference to an "embodiment" in this document means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments.

[0045] With the development of display devices such as notebook computers, displays, televisions, tablets, and outdoor large screens, LED display screens have higher requirements for row driving. Row switching is implemented by P-MOSFET alone, and multifunctional row driving with higher integration and stronger functions is required.

[0046] Please refer to Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a display device provided by an embodiment in the prior art, Figure 2 is Figure 1 a partial timing diagram of a scan signal and a data signal of the display device in the prior art. The display device includes a display panel, a row driving unit, and a column driving unit. The scan lines are represented by G1, G2, …, Gn, and the data lines are represented by D1, D2, D3, …, Dm. The column driving unit is connected to the data lines, and the row driving unit is connected to the scan lines.

[0047] In the same row of light emitting units, the cathodes are connected to the same scan line, and in the same column of light emitting units, the anodes are connected to the same data line. The light emitting units are light emitting diodes (LEDs). As shown in Figure 2 When the scan signal of the scan line is at a low level, the voltage on the scan line (i.e., the cathode voltage of the LED) is pulled low, and the voltage on the data line (i.e., the anode voltage of the LED) is displayed. The driving signal on the data line is specifically a pulse width modulation (PWM) signal, and the pulse width of the driving signal determines the luminance of the LED. For example, in this embodiment, the width of the high of the driving signal on the data line will cause the LED to display the corresponding luminance. The luminance of the LED corresponding to the kth column of data lines D(k) is less than the luminance of the LED corresponding to the (k+1)th column of data lines D(k+1), and the luminance of the LED corresponding to the (k+1)th column of data lines D(k+1) is less than the luminance of the LED corresponding to the (k+2)th column of data lines D(k+2).

[0048] Please refer to Figure 3 , Figure 3is a waveform relationship diagram of gray scale and gray scale clock provided by an embodiment in the prior art. Generally, the minimum width of the pulse of the driving signal is controlled by the gray scale clock GCLK. Generally, the pulse width of 1 GCLK period T width represents the pulse width of gray scale 1, the pulse width of 2 GCLK periods T width represents the pulse width of gray scale 2, the pulse width of 3 GCLK periods T width represents the pulse width of gray scale 3, and so on. Therefore, for the architecture using PWM to do gray scale, the gray scale is only related to GCLK, and the maximum number of GCLK periods in a frame stage is the upper limit of the gray scale. Then, for high gray scale, the pulse width shown by PWM will be very wide.

[0049] Referring to Figure 4 , Figure 4 is a working framework diagram of a brightness correction system provided by an embodiment in the prior art. In the general technology, since the color deviation problem often occurs in the LED display panel, the driving signal needs to be compensated to make the display panel get the correct brightness display. Generally, the brightness correction stage needs to be completed before the display panel is shipped after being prepared. As shown in Figure 4 , the LED generates the most original light for the display unit, then a correction shooting unit (camera) is used to shoot the display picture of the display unit, and the image data is transmitted to a data processing unit (MCU). The MCU processes the image data to obtain the data to be compensated, and then transmits the compensation data to a storage unit (flash). The flash stores the compensation data corresponding to each original data. Then each time the display is displayed, the MCU reads the corresponding compensation data from the flash according to the original data, and transmits the original data combined with the compensation data to a driving unit (DIC). The DIC converts the compensated data into a PWM pulse width signal to drive the LED, so as to get the correct brightness display. When the correction is completed, the correction shooting unit is removed, that is, the MCU directly calls the compensation data in the flash, and then transmits the compensated data to the DIC for normal display.

[0050] Referring to Figure 5 , Figure 5 is a gray scale diagram of the picture obtained by the camera shooting in the prior art. However, in the prior art, when the camera is used for shooting, there will be similar Figure 5The strip-shaped dark lines are not conducive to data correction. The phenomenon is caused by the fact that when the LED control display is displayed, it is displayed frame by frame. At present, the LED display panel basically works at 60Hz, so the time of each frame is 16.67ms. Because the PWM driving LED is used, that is, the LED is bright when the signal comes, and it is not bright after being turned off. The system does not use all the time to display, and leaves a time as a buffer period. Outside the current line, the LED does not display the picture, and the camera is exposed to these time intervals when shooting, which forms the black field seen when shooting, that is, the strip-shaped dark lines.

[0051] Please refer to Figure 6 , Figure 6 is a partial timing diagram of a gray scale clock and a data signal provided by an embodiment of the prior art. As shown in the figure, LED1, LED2 and LED3 are three continuous light emitting units in a row. According to the driving mode in the prior art, LED1, LED2 and LED3 display the same gray scale, and will all be turned on at a fixed row opening time period in a fixed frame period. The time of turning off the whole row of light emitting units before the next frame is the same, and the time of turning off is also the same. Therefore, the strip-shaped dark field line is more obvious, that is, the longer the length of the time of turning off is, the more obvious it is.

[0052] Therefore, the present application provides a driving device and a display device to solve the above technical problems. The driving device of the present application is applied to a display panel.

[0053] The present application will be described in detail below in conjunction with the drawings and embodiments.

[0054] Please refer to Figure 7 , Figure 7 is a structural schematic diagram of a display device provided by the first embodiment of the present application. In the present embodiment, a display device is provided, which includes a display panel 100 and a driving device 200. The driving device 200 is electrically connected with the display panel 100, and is used to drive the display panel 100 to display an image.

[0055] The display panel 100 includes a plurality of sub-pixels 10, and the plurality of sub-pixels 10 are arranged in a matrix. The sub-pixel 10 can include a current-driven light emitting element, such as a light emitting diode (LED), a mini-LED, a micro-LED, an organic light emitting diode (OLED), and the like. The specific type can be selected according to the use scene and the type of the display panel 100. In the present embodiment, the case where the sub-pixel 10 includes an LED is taken as an example for description.

[0056] Further, the display panel 100 further comprises a plurality of scan lines Scan extending along the row direction of the matrix and a plurality of data lines Data extending along the column direction of the matrix. The scan lines Scan are arranged between two adjacent rows of the sub-pixels 10, and each row of the sub-pixels 10 is electrically connected to a corresponding scan line Scan. The data lines Data are arranged between two adjacent columns of the sub-pixels 10, and each column of the sub-pixels 10 is electrically connected to a corresponding data line Data. In other embodiments, the connection mode of the data lines Data and the scan lines Scan to the sub-pixels 10 can also be other modes, which can be set according to the driving mode, for example, in the first 1st to n / 2th rows of the sub-pixels 10, each column of the sub-pixels 10 is connected to a corresponding data line, and in the (n / 2+1)th to n th rows of the sub-pixels 10, each column of the sub-pixels 10 is connected to a corresponding data line, so as to drive two rows of the sub-pixels 10 at the same time.

[0057] In the embodiment, the anode of each row of the sub-pixels 10 is electrically connected to a corresponding scan line Scan, and the cathode of each column of the sub-pixels 10 is electrically connected to a corresponding data line Data. When the scan signal is at a high level, the voltage on the scan line Scan (i.e. the anode voltage of the sub-pixel 10) is pulled high, and when the data signal on the data line Data is at a low level (i.e. the cathode voltage of the sub-pixel 10 is pulled low), the driving current can pass through the sub-pixel 10, so as to display the brightness represented by the data signal. In other embodiments, the cathode of each row of the sub-pixels 10 can be electrically connected to a corresponding scan line Scan, and the anode of each column of the sub-pixels 10 can be electrically connected to a corresponding data line Data, which can be set according to actual needs, and is not limited herein.

[0058] In the embodiment, the driving apparatus 200 comprises a scan driving unit 20 and a data driving unit 30. The scan driving unit 20 can be arranged separately from the display panel 100 or arranged on the display panel 100. The scan driving unit 20 is electrically connected to the scan lines Scan on the display panel 100, and is configured to output a scan signal to open the sub-pixels 10 row by row. The data driving unit 30 is electrically connected to the data lines Data of the display panel 100, and is configured to output a data signal to cooperate with the scan signal to drive the sub-pixels 10 to emit light, so that the brightness (which can also be referred to as the gray scale) represented by the data signal is displayed.

[0059] Specifically, in a frame period F, the scan signal output by the scan driving unit 20 causes at least one row of the sub-pixels 10 to open multiple times. That is, in the frame period F, the scan signal on at least one scan line Scan has multiple high level stages, so that the sub-pixels 10 in the corresponding row open multiple times in the frame period F.

[0060] In the multiple opening stages of at least one row of sub-pixels 10 in a frame period F, the data driving unit 30 transmits corresponding data signals to the sub-pixels 10, so that the sub-pixels 10 emit light at least in one of the multiple opening stages, and the adjacent sub-pixels 10 in the same row emit light in different times. That is, in the multiple opening stages of at least one row of sub-pixels 10 in a frame period F, the data signal on each data line Data is at a low level in at least one opening stage, so that the corresponding sub-pixel 10 emits light in at least one of the multiple opening stages; at the same time, the low level of the data signal on the adjacent data line Data is in different opening stages, so that the adjacent sub-pixels 10 in the same row emit light in different opening stages.

[0061] Through the above setting of the driving device 200, in a frame period F, at least one row of sub-pixels 10 is opened multiple times, and in the multiple opening stages, each sub-pixel 10 emits light at least in one of the opening stages to display the brightness corresponding to the gray scale, so as to realize the image display function of the display panel 100. At the same time, the data signal on each data line Data of the data driving unit 30 makes the adjacent sub-pixels 10 in the same row emit light in different opening stages, so that in a frame period, the specific light-emitting time of the adjacent sub-pixels 10 in the opened pixel row is different, which destroys the consistency of the light-emitting time and the extinguishing time point of the adjacent sub-pixels 10, and thus the uniformity of the band-shaped dark lines that are prone to appear when using a camera to take a picture of the display panel 100 is disturbed, and it is not easy to appear a large-area or continuous dark field, so that the dark field is not easy to be observed, which can significantly reduce the appearance of band-shaped dark lines and effectively improve the phenomenon of band-shaped dark lines appearing in the image obtained by the camera.

[0062] Please refer to Figure 8 , Figure 8 is Figure 7A partial timing diagram of an embodiment of a medium grayscale signal and a data signal is provided. In this embodiment, at least one row of sub-pixels 10 is turned on multiple times within a frame period F, specifically N times, that is, a frame period F may include a 1st opening stage to an Nth opening stage in sequence, and a blank stage of a preset duration is set between adjacent opening stages. In each opening stage, the grayscale clock GCLK outputs a pulse clock waveform of Y cycles T, and the value of Y may be the same as the maximum grayscale value that the sub-pixel 10 needs to display, so that the sub-pixel 10 can display the maximum brightness in any of the opening stages. For example, if the maximum grayscale value that the sub-pixel 10 in the display panel 100 needs to display is 512, the grayscale clock GCLK outputs a pulse clock waveform of 512 cycles T in each opening stage. Wherein, N and Y are both positive integers greater than 2. Alternatively, the value of Y can also be 1 / N of the maximum grayscale value. Since the sub-pixel 10 can emit light in at least one opening stage, the sub-pixel 10 can emit light in N opening stages. Then the maximum total pulse width of the data signal can be Y*N. Therefore, the maximum grayscale value that the sub-pixel 10 can reach within a frame period F is Y*N.

[0063] In this embodiment, the data signals outputted by the data driving unit 30 to three of the data lines Data are taken as an example for description. Figure 8 As shown in FIG. , the figure shows the grayscale signal within a frame period F and the data signals on three consecutive data lines therein. Within a frame period F, it is divided into N open stages arranged in chronological order, namely the 1st open stage, the 2nd open stage, the 3rd open stage, and the Nth open stage, and there is a blank area with a preset time interval between adjacent open stages. Among them, the data signal on the i-th data line D(i), the data signal on the (i+1)-th data line D(i+1), and the data signal on the (i+2)-th data line D(i+2) are transmitted in parallel to the corresponding three consecutive sub-pixels 10 in the same row within a frame period F. The three sub-pixels 10 are LED1, LED2, and LED3. It can be understood that LED1, LED2, and LED3 are three consecutive sub-pixels 10 in the same row. The data signal is specifically a PWM signal, and the valid data signal is when the PWM signal is at a low level.

[0064] like Figure 8The data signal on the i-th data line D(i) is low when the sub-pixel row is opened for the first time, i.e. the data driving unit 30 transmits an effective data signal on the i-th data line D(i) when the sub-pixel row is opened for the first time, so that the corresponding sub-pixel LED 1 emits light when opened for the first time, and the gray scale value of the light emission is 1. The data signal on the (i+1)-th data line D(i+1) is low when the sub-pixel row is opened for the second time, so that the corresponding sub-pixel LED 2 emits light when opened for the second time, and the gray scale value of the light emission is 1. The data signal on the (i+2)-th data line D(i+2) is low when the sub-pixel row is opened for the first time and for the second time, so that the corresponding sub-pixel LED 3 emits light when opened for the first time and for the second time, and the total pulse width of the data signal is 3 gray scale clock GCLK periods T, i.e. the gray scale value of the light emission of the sub-pixel LED 3 in this frame stage F is 3. As can be seen from the figure, the adjacent sub-pixels 10 emit light in different opening times in a frame period F, so that the light emission time and the extinguishing time of each sub-pixel 10 in a row are no longer the same, and the uniformity of the originally easy-to-occur band-shaped dark lines is disrupted, so that the occurrence of the band-shaped dark lines can be significantly reduced when a camera is used to take a picture.

[0065] Please refer to Figure 9 , Figure 9 is Figure 7 The specific timing diagram provided by another embodiment of the gray scale signal and the data signal is shown in the figure. In this embodiment, for the same sub-pixel 10, the opening time at which the data driving unit 30 transmits an effective data signal in the current frame period F(x), the opening time at which the data driving unit 30 transmits an effective data signal in the previous frame period F(x-1), and the opening time at which the data driving unit 30 transmits an effective data signal in the next frame period F(x+1) are different from each other.

[0066] Specifically, as Figure 9 shown, the data signal on the i-th data line D(i), the data signal on the (i+1)-th data line D(i+1), and the data signal on the (i+2)-th data line D(i+2) are still taken as examples for illustration in this embodiment.

[0067] The data signal on the i-th data line D(i) is transmitted to the corresponding sub-pixel LED1, and the data signal is low in the first opening stage in the previous frame period F(x-1), and the low pulse width is 1; the data signal is low in the second opening stage in the current frame period F(x), and the low pulse width is 1; the data signal is low in the third opening stage in the next frame period F(x+1), and the low pulse width is 2. As can be seen, for the sub-pixel LED1, the data signal transmitted by the data driving unit 30 is an effective data signal in the first opening stage in the previous frame period F(x-1), an effective data signal in the second opening stage in the current frame period F(x), and an effective data signal in the third opening stage in the next frame period F(x+1). This makes the sub-pixel 10 have different off durations from the previous frame period F(x-1) to the current frame period F(x) and from the current frame period F(x) to the next frame period F(x+1), so as to further disrupt the consistency of the dark field time and further improve the phenomenon of the band-shaped dark lines when the camera is shooting.

[0068] The data signal on the i-th data line D(i) is transmitted to the corresponding sub-pixel LED1, and the data signal is low in the first opening stage in the previous frame period F(x-1), and the low pulse width is 1; the data signal is low in the second opening stage in the current frame period F(x), and the low pulse width is 1; the data signal is low in the third opening stage in the next frame period F(x+1), and the low pulse width is 2. As can be seen, for the sub-pixel LED1, the data signal transmitted by the data driving unit 30 is an effective data signal in the first opening stage in the previous frame period F(x-1), an effective data signal in the second opening stage in the current frame period F(x), and an effective data signal in the third opening stage in the next frame period F(x+1). This makes the sub-pixel 10 have different off durations from the previous frame period F(x-1) to the current frame period F(x) and from the current frame period F(x) to the next frame period F(x+1), so as to further disrupt the consistency of the dark field time and further improve the phenomenon of the band-shaped dark lines when the camera is shooting.

[0069] The data signal on the (i+2)th data line D(i+2) is transmitted to the corresponding sub-pixel LED 3, and the data signal has a low level state in the first opening stage and the second opening stage in the previous frame period F(x-1), wherein the low level pulse width in the first opening stage is 2, the low level pulse width in the second opening stage is 1, and the total pulse width of the data signal is 3; the data signal has a low level state in the first opening stage and the second opening stage in the current frame period F(x), and the difference from the previous frame period F(x-1) is that the low level pulse width in the first opening stage is 1, and the low level pulse width in the second opening stage is 2. Although the number of opening times in the current frame period F(x) is the same as that in the previous frame period F(x-1), the pulse width in the same number of opening times is different, that is, the waveform of the data signal in the previous frame period F(x-1) is different from that in the current frame period F(x); in the next frame period F(x+1), the data signal is low in the Nth opening stage, and the low level pulse width is 3. That is, the effective level stage of the data signal representing the same gray scale can be dispersed in multiple opening stages, or it can also be in one of the opening stages. The specific setting can be made according to the preset rule to disrupt the consistency of the data output waveform, so as to further improve the problem of the camera shooting band-shaped dark lines.

[0070] Further, for the same sub-pixel 10, from the 1st frame to the Nth frame, the data driving unit 30 can transmit the corresponding effective data signal in different opening times according to a preset order rule; the preset order rule is an order arrangement rule of the number of opening times, and the order rule has a cycle period of N frames. For example, for the same sub-pixel 10, from the 1st frame to the Nth frame, the data signal is an effective level pulse signal with a corresponding width in the first, second, third, …, Nth opening stage, so that the sub-pixel 10 emits light in the corresponding opening times in each frame stage according to the corresponding gray scale value, and displays the brightness of the corresponding gray scale value, and in the next group of 1st frame to Nth frame, the data signal is still transmitted according to the order of the number of opening times, so that the sub-pixel 10 can not only change the original brightness, but also can disrupt the light-emitting time in each frame stage F, thereby improving the above technical problems. At the same time, by setting the preset order rule, the driving process of the driving device 200 can be simplified, and the driving method is simpler and more practical.

[0071] In other embodiments, for the same sub-pixel 10, the preset sequence rule of the preset signal can also be (1, 2), 3, (4, 5), 6, … (N-2, N-1), N from the 1st frame to the Nth frame. Wherein, (a, b) represents the a-th opening stage and the b-th opening stage in a frame period F. Specifically, the preset arrangement rule can be flexibly set according to the display needs, which can be a mixed arrangement of multiple opening stages and single opening stage, or an arrangement of all single opening stages, or an arrangement of all multiple opening stages, and the specific sequence arrangement rule is not limited.

[0072] Further, along the row direction of the matrix, in each row of sub-pixels 10, N sub-pixels 10 that are sequentially adjacent are taken as a group; in at least one row of sub-pixels 10 that are turned on in a frame period F, the data driving unit 30 respectively transmits corresponding effective data signals to different sub-pixels 10 in each group at different opening times; and in each group of sub-pixels 10, the opening times of the sub-pixels 10 are transmitted with corresponding effective data signals according to a preset arrangement rule.

[0073] That is, along the row direction of the matrix, N data lines arranged in sequence are taken as a group, and in a frame period F, the data signals on each data line Data respectively transmit corresponding effective data signals to the corresponding sub-pixels 10 at different opening times, and the data signals on each group of data lines Data, from the data signal on the 1st data line D1 to the data signal on the Nth data line DN, transmit effective level pulse signals to the corresponding sub-pixels 10 in parallel according to a preset arrangement rule, and the preset arrangement rule in each group is the same. For example, the opening times of the data signals on the 1st data line D1 to the Nth data line DN are 1, 2, 3, … N, or 1, (2, 3), 4, (5, 6), … N-2, (N-1, N) respectively. Similarly, the specific preset arrangement rule can be set according to actual design needs. Through this setting mode, the data signals can be regularly transmitted, which is beneficial to the setting of the control program, and at the same time, it is beneficial to reduce the data processing amount, avoid slow response speed, and is beneficial to the simplification of hardware, thereby reducing the cost.

[0074] Please refer to Figure 10 , Figure 10is a structural schematic diagram of a display device provided by a second embodiment of the present application. In this embodiment, the data driving unit 30 comprises a timing controller 31, a multiplexer 32 and a memory 33. The timing controller 31 is electrically connected to the control end of the multiplexer 32 to control the conduction channel of the multiplexer 32; a plurality of memories 33 are respectively electrically connected to a plurality of input ends of the multiplexer 32 to provide data signals to the multiplexer 32; the number of input ends of the multiplexer 32 is the same as the number of opening times of at least one row of sub-pixels 10; and the output end of the multiplexer 32 is electrically connected to the corresponding column of sub-pixels 10 to transmit corresponding data signals to the corresponding sub-pixels 10.

[0075] Specifically, in a frame period F, the timing controller 31 transmits a gate control signal Sic to the multiplexer 32; the multiplexer 32 turns on the corresponding input end and output end according to the gate control signal Sic to transmit the corresponding data signal in the corresponding memory 33 to the sub-pixel 10, so that the sub-pixel 10 emits light in the corresponding opening time.

[0076] Specifically, the multiplexer 32 has a plurality of input ends, each of which is electrically connected to a corresponding memory 33. Taking the case where the multiplexer 32 has N input ends as an example, the N memories 33 electrically connected to the N input ends are W1, W2, …, WN respectively, which are used to store data signals corresponding to the opening times of the sub-pixel row in a frame period F. In a frame period F, each memory 33 stores a corresponding data signal, the timing controller 31 transmits a corresponding gate control signal Sic to the multiplexer 32 according to a predetermined sequence rule, the multiplexer 32 turns on the corresponding input end and output end according to the gate control signal Sic to transmit the corresponding data signal in the memory 33 connected to the corresponding input end to the output end, and the output end of the multiplexer 32 is electrically connected to the data line Data of the corresponding column, so that the data signal is transmitted to the corresponding sub-pixel 10 through the data line Data to make the sub-pixel 10 display light of corresponding brightness in the corresponding opening time.

[0077] Specifically, the timing controller 31 transmits a corresponding gate control signal Sic to the multiplexer 32 according to the predetermined sequence rule described above to sequentially control the multiplexer 32 to turn on the corresponding input end and output end, so that the multiplexer 32 sequentially transmits corresponding data signals to the sub-pixel 10 to make the sub-pixel 10 emit light in the corresponding opening time. The predetermined sequence rule is an opening time order arrangement rule, and the predetermined sequence rule has a cycle period of N frames. Specifically, the gate control signal Sic is a binary digital signal, the number of bits of the binary digital signal is x, which is determined by the number of opening times of at least one row of sub-pixels 10 in a frame period F. Specifically, if the number of opening times is N, then 2 x= N, therefore, the bit number x of the binary digital signal = log2N. For example, in this embodiment, the opening number N = 32, and the bit number x of the gate control signal Sic = 5.

[0078] Please refer to Figure 11 , Figure 11 is a corresponding relationship table of the gate control signal and the conduction path provided by an embodiment of the present application. Specifically, taking the opening number of at least one row of sub-pixels 10 in a frame period F as 32 times as an example for illustration. As shown in the figure, Si represents the gate control signal Sic transmitted by the time sequence controller 31 to the i-th multiplexer 32. When Si is 00000, it means that the first input end and the output end of the i-th multiplexer 32 are controlled to be conductive, so that the multiplexer 32 reads the data signal in W1, and transmits the data signal in W1 to the corresponding sub-pixel 10 through the data line D1, so that the corresponding sub-pixel 10 displays the corresponding brightness in the first opening stage of the current frame period F. When Si is 00001, it means that the second input end and the output end of the multiplexer 32 are controlled to be conductive, so that the multiplexer 32 reads the data signal in the memory W2, and transmits the data signal in the memory W2 to the corresponding sub-pixel 10 through the data line D2, so that the corresponding sub-pixel 10 displays the corresponding brightness in the second opening stage of the current frame period.

[0079] In another embodiment, the memories W1 to WN store N kinds of data signal waveforms of the current frame, the effective level pulse width values of each data signal waveform are the same, the positions of the effective levels are different, the effective level pulses can be distributed in different opening numbers, and can be distributed in multiple opening numbers or single opening number, which can be set according to a preset rule.

[0080] In this embodiment, after the data signal is output in a frame period F, the data signal in each memory 33 is rewritten to update the data signal to be displayed in the next frame period F(x+1). In the next frame period F(x+1), the time sequence controller 31 transmits a gate control signal Sic different from that in the previous frame period F(x-1), so that the light-emitting period of the sub-pixel 10 is different from that in the previous frame period F(x-1). Similarly, in the order of frames, the gate control signal Sic output by the time sequence controller 31 is N frames in a cycle.

[0081] Further, the adjacent N multiplexers 32 are taken as a group. In a frame period F, the time sequence controller 31 transmits corresponding gate control signals Sic to the N multiplexers 32 in each group according to a preset arrangement rule, so that the arrangement order of the conduction paths of the N multiplexers 32 in each group is the same as that of the conduction paths of the N multiplexers 32 in other groups.

[0082] That is, in a frame period F, the timing controller 31 outputs a respective corresponding gate control signal Sic to the plurality of multiplexers 32 in parallel according to a preset arrangement rule. Among the first multiplexer 32 to the Nth multiplexer 32, the gate control signal Sic is transmitted to the corresponding multiplexer 32 according to the preset arrangement rule. Similarly, the (N+1)th multiplexer 32 to the 2Nth multiplexer 32, the gate control signal Sic is transmitted to the corresponding multiplexer 32 according to the same preset arrangement rule, and each N S line is a cycle. Wherein, S line represents the signal wire that the timing controller 31 is respectively connected with each multiplexer 32.

[0083] Through the above setting, the output mode of the data signal on the adjacent data line Data is disturbed, and the output mode of the data signal on each data line Data is also disturbed, so that the long-term consistency of the large-area blank area of the data signal is avoided, and the strip-shaped dark lines appearing when the camera is shooting can be effectively improved.

[0084] The above is only an embodiment of the present application, and does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A driving device for a display panel, wherein the display panel comprises a plurality of sub-pixels arranged in a matrix; The driving device comprises: A scan driving unit, configured to output a scan signal, wherein the scan signal causes at least one row of sub-pixels to be turned on multiple times within a frame period; a data driving unit configured to output a data signal; wherein during a plurality of on-state phases of the at least one row of sub-pixels within a frame period, the data driving unit transmits corresponding data signals to the sub-pixels, causing the sub-pixels to emit light at least once, and adjacent sub-pixels in the same row to emit light at different times; For the same sub-pixel, the number of times the data driving unit is turned on when transmitting a valid data signal in a current frame period, the number of times the data driving unit is turned on when transmitting the valid data signal in a previous frame period, and the number of times the data driving unit is turned on when transmitting the valid data signal in a next frame period are different from each other.

2. The driving device according to claim 1, characterized in that The scanning signal causes at least one row of sub-pixels to be turned on N times in one frame period, where N is an integer greater than 2; From the 1st frame to the Nth frame, for the same sub-pixel, the data driving unit transmits the corresponding valid data signal in different opening times according to a preset sequence rule; the preset sequence rule is an order arrangement rule for the opening times, and the sequence rule takes N frames as a cycle.

3. The driving device according to claim 2, characterized in that Along the row direction of the matrix, in each row of sub-pixels, N sub-pixels that are adjacent in sequence form a group; in at least one row of sub-pixels that are turned on within a frame period, the data driving unit transmits the corresponding valid data signals to different sub-pixels in each group at different opening times; and in each group of sub-pixels, the corresponding valid data signals are transmitted according to a preset arrangement rule for the opening times of the sub-pixels.

4. The driving device according to claim 1, characterized in that The data driving unit includes a timing controller, a multiplexer and a memory; The timing controller is electrically connected to the control terminal of the multiplexer to control the conduction channel of the multiplexer; The plurality of memories are electrically connected to the plurality of input terminals of the multiplexer, respectively, for providing the data signal to the multiplexer; the number of the input terminals of the multiplexer is the same as the number of times the at least one row of sub-pixels is turned on; The output end of the multiplexer is electrically connected to the sub-pixels in the corresponding column, and is used to transmit the corresponding data signal to the corresponding sub-pixels.

5. The driving device according to claim 4, characterized in that In one frame period, the timing controller transmits a gating control signal to the multiplexer; The multiplexer turns on the corresponding input end and output end according to the selection control signal to transmit the corresponding data signal in the corresponding memory to the sub-pixel, so that the sub-pixel emits light in the corresponding opening times.

6. The driving device according to claim 4, characterized in that The timing controller transmits corresponding selection control signals to the multiplexer in sequence according to a preset sequence rule, so as to control the multiplexer to turn on the corresponding input and output ends in sequence, so that the multiplexer transmits corresponding data signals to the sub-pixels in sequence, so that the sub-pixels emit light in the corresponding number of openings; wherein the preset sequence rule is a rule for arranging the order of the opening times, and the preset sequence rule takes N frames as a cycle period.

7. The driving device according to claim 6, characterized in that N adjacent multiplexers are grouped together; within a frame period, the timing controller transmits the corresponding selection control signal to the N multiplexers in each group according to a preset arrangement rule, so that the arrangement order of the conduction paths of the N multiplexers in each group is the same as the arrangement order of the conduction paths of the N multiplexers in other groups.

8. The driving device according to claim 5, characterized in that The data signal is a pulse width signal; within a frame period, the plurality of memories electrically connected to the same multiplexer respectively store the pulse width signals corresponding to the number of opening times, and the pulse widths of the pulse width signals are the same; The strobe control signal is a binary digital signal.

9. A display device, characterized in that: include: A display panel comprising a plurality of sub-pixels arranged in a matrix; a driving device, electrically connected to the display panel, for driving the plurality of sub-pixels to display an image; The driving device is the driving device according to any one of claims 1 to 8.

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