Driving method of display panel, time schedule controller and display device

Abstract

The invention provides a driving method of a display panel, a time schedule controller and a display device. The driving method of the display panel comprises the following steps: judging whether image quality abnormity is caused by a charging problem or not; if yes, adjusting the output enable signal according to the panel architecture and the inversion mode so as to enable the adjacent sub-pixels to have the same level time during charging; wherein the upper row of grid lines are closed according to the rising edge of the output enable signal, the lower row of grid lines are opened according to the falling edge of the output enable signal, and the data lines charge the corresponding sub-pixels in the opening time period of the grid lines. According to the invention, the problem of head shaking lines caused by different brightness of adjacent sub-pixels can be improved, and the image quality is improved.

Description

Technical Field

[0001] The present invention relates to the field of display driving technology, and in particular to a display panel driving method, a timing controller and a display device. Background Art

[0002] Display devices, such as liquid crystal displays (LCDs), have gradually replaced traditional cathode ray tube displays due to their many advantages such as being light, thin, energy-efficient, and radiation-free. They are widely used in electronic devices such as high-definition digital televisions, desktop computers, personal digital assistants, laptops, mobile phones, digital cameras, and so on.

[0003] Currently, display devices on the market can use a variety of drive structures and inversion methods to charge pixels. However, under certain drive structures and inversion methods, pixels may be undercharged, resulting in abnormal display. Figure 1 As shown, the display device of the prior art can adopt a dual gate architecture and a 2dot inversion method. Every two columns of sub-pixels share one data line. From the Nth frame to the N+1th frame, the polarities of the two columns of sub-pixels sharing one data line are the same and inverted at the same time. Figure 2 yes Figure 1 In a timing diagram, the rising and falling times of adjacent sub-pixels when driven by the source Source may be inconsistent, resulting in different level times Thold when adjacent sub-pixels are charged. Figure 2 In the example, the level time Thold of sub-pixel ① is smaller than the level time Thold of sub-pixel ②, and the level time Thold of sub-pixel ③ is smaller than the level time Thold of sub-pixel ④. This will result in different brightness of adjacent sub-pixels, causing a shaking head wrinkle problem when the picture is displayed.

[0004] Therefore, it is necessary to provide an improved technical solution to overcome the above technical problems existing in the prior art. Summary of the invention

[0005] In view of this, the present invention provides a display panel driving method, a timing controller and a display device, which can improve the shaking head problem caused by the different brightness of adjacent sub-pixels and achieve improved image quality.

[0006] An embodiment of the present invention provides a method for driving a display panel, comprising: determining whether abnormal image quality is caused by a charging problem; if so, adjusting an output enable signal according to a panel architecture and an inversion method so that adjacent sub-pixels have the same level time when being charged; wherein, according to a rising edge of the output enable signal, a previous row of gate lines is closed, and according to a falling edge of the output enable signal, a next row of gate lines is opened, and during the opening period of the gate lines, the data lines charge the corresponding sub-pixels.

[0007] Specifically, the output enable signal is adjusted according to the panel architecture and the inversion mode, including: adjusting the number of high levels, and / or the phase, and / or the high level time of the output enable signal in the scanning cycle according to the panel architecture and the inversion mode.

[0008] Specifically, the determination of whether the abnormal image quality is caused by a charging problem includes: determining whether there is a problem with the image quality; if so, determining whether the waveform of the source drive signal is abnormal; if so, determining whether the abnormal waveform is caused by a non-charging problem; if not, determining that the abnormal image quality is caused by a charging problem.

[0009] Specifically, the output enable signal is adjusted according to the panel architecture and the inversion mode, including: if the panel architecture is a dual gate architecture and the inversion mode is a 2dot inversion mode, the number of high levels of the output enable signal in a scanning period is adjusted to 4.

[0010] Specifically, the output enable signal is adjusted according to the panel architecture and the inversion method, including: according to the two level times when two sub-pixels with the same polarity are charged, the smaller level time is taken as the standard, and the output enable signal is adjusted to increase the corresponding high level time, so that the two level times when the two sub-pixels with the same polarity are charged are equal.

[0011] Specifically, the output enable signal is adjusted according to the panel architecture and the inversion method, including: according to the two level times when two sub-pixels with the same polarity are charged, the output enable signal adjusts the phase based on the time that divides the two level times so that the two level times when two sub-pixels with the same polarity are equal.

[0012] Specifically, the output enable signal is adjusted according to the panel architecture and the inversion method, including: adjusting the number of high levels of the output enable signal in a scanning period according to the panel architecture and the inversion method; judging whether the positive polarity level time is equal to the negative polarity level time; if they are not equal, adjusting the phase of the output enable signal to make the two level times of two sub-pixels with the same polarity equal; if they are equal, judging whether the holding time of charging of adjacent sub-pixels is equal, and if they are not equal, adjusting the high level time to make the level time of adjacent sub-pixels equal when charging.

[0013] An embodiment of the present invention further provides a timing controller for executing the above-mentioned display panel driving method.

[0014] Specifically, the timing controller includes a register, and the register stores at least one setting parameter of the number of high levels of the output enable signal in a scanning period, and / or a phase, and / or a high level time.

[0015] An embodiment of the present invention further provides a display device, comprising the above-mentioned timing controller.

[0016] The display panel driving method, timing controller and display device of the present invention can determine whether the abnormal image quality is caused by charging problems; if so, the output enable signal is adjusted according to the panel structure and inversion method so that the level time of adjacent sub-pixels when charging is the same. Therefore, the shaking head problem caused by the different brightness of adjacent sub-pixels can be improved, the image quality can be improved, and the application ability of the display device in special scenes can be improved.

[0017] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a display device in the prior art that adopts a dual gate architecture and a 2dot inversion method.

[0019] Figure 2 yes Figure 1 A timing diagram of .

[0020] Figure 3 is a flow chart of a method for driving a display panel according to an embodiment of the present invention.

[0021] Figure 4 is a specific flow chart of a method for driving a display panel according to an embodiment of the present invention.

[0022] Figure 5 yes Figure 4 A timing diagram of .

[0023] Figure 6 yes Figure 4 Another timing diagram of .

[0024] Figure 7 yes Figure 4 Another timing diagram of .

[0025] Figure 8 is another specific flow chart of a method for driving a display panel according to an embodiment of the present invention.

[0026] Fig. 9 yes Figure 8 A timing comparison diagram.

[0027] Fig.10 yes Figure 8 Another timing comparison diagram of . DETAILED DESCRIPTION

[0028] In order to further explain the technical means and effects adopted by the present invention to achieve the intended purpose, the specific implementation methods, methods, steps, structures, characteristics and effects of the display panel driving method, timing controller and display device proposed in the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0029] Figure 3 FIG. 1 is a flow chart of a method for driving a display panel according to an embodiment of the present invention. Figure 3 As shown, the driving method of the display panel includes: S1, determine whether the abnormal image quality is caused by charging problems; S2, if yes, the output enable signal is adjusted according to the panel architecture and the inversion method so that the level time of adjacent sub-pixels during charging is the same; wherein, according to the rising edge of the output enable signal, the previous row of gate lines is closed, and according to the falling edge of the output enable signal, the next row of gate lines is opened, and during the opening period of the gate lines, the data lines charge the corresponding sub-pixels.

[0030] Figure 4 is a specific flow chart of a method for driving a display panel according to an embodiment of the present invention.

[0031] In one embodiment of the present invention, Figure 4 As shown, the output enable signal is adjusted according to the panel architecture and the inversion method, including: adjusting the number of high levels, and / or the phase, and / or the high level time of the output enable signal in the scanning cycle according to the panel architecture and the inversion method.

[0032] In one embodiment of the present invention, Figure 4 As shown, judging whether the abnormal picture quality is caused by a charging problem includes: judging whether there is a problem with the picture quality; if so, judging whether the waveform of the source drive signal is abnormal; if so, judging whether the abnormal waveform is caused by a non-charging problem; if not, judging that the abnormal picture quality is caused by a charging problem.

[0033] In one embodiment of the present invention, the output enable signal is adjusted according to the panel architecture and the inversion mode, including: if the panel architecture is a dual gate architecture and the inversion mode is a 2dot inversion mode, the number of high levels of the output enable signal in a scanning period is adjusted to 4.

[0034] For details, please also refer to Figure 3 , 4 and 5, Figure 5 yes Figure 4A timing diagram of . First, determine whether the abnormal image quality is caused by a charging problem. For example, you can first determine whether there is a problem with the image quality; if so, determine whether the waveform of the source drive signal is abnormal; if so, determine whether the waveform abnormality is caused by a non-charging problem; if not, determine that the abnormal image quality is caused by a charging problem. Then, if it is determined that the abnormal image quality is caused by a charging problem, adjust the output enable signal according to the panel architecture and inversion method. For example, if the panel architecture is a dual gate architecture and the inversion method is a 2dot inversion method, adjust the number of high levels of the output enable signal OE in the scanning cycle to 4, and the number of high levels of the output enable signal OE in the scanning cycle can also be set according to other architectures and inversion methods. The charging time of the four sub-pixels is separated according to the four high levels of the output enable signal OE. For example, when the output enable signal OE rises from a low level to the first high level, the first gate drive signal Gate① stops outputting, and when the output enable signal OE drops from the first high level to a low level, the second gate drive signal Gate② starts outputting. By adjusting the high level phase of the output enable signal OE, and / or the high level time, etc., the start time and end time of each gate drive signal can be adjusted, and then the level time of the corresponding sub-pixel when charging can be adjusted, so that the level time of adjacent sub-pixels when charging is the same and produces the same brightness, thereby improving the shaking head problem caused by the different brightness of adjacent sub-pixels and achieving improved image quality.

[0035] In one embodiment of the present invention, the output enable signal is adjusted according to the panel architecture and the inversion method, including: according to the two level times when two sub-pixels with the same polarity are charged, the smaller level time is used as the basis, and the output enable signal is adjusted to increase the corresponding high level time, so that the two level times when the two sub-pixels with the same polarity are charged are equal. Figure 6 In the figure, when sub-pixel ① is charged and raised due to the source driving signal, the level time Thold of sub-pixel ① is initially smaller than the level time Thold of sub-pixel ②. The level time Thold of sub-pixel ① is taken as the standard, and the output enable signal OE is adjusted to increase the first high level time, so that the charging start time of sub-pixel ② is delayed, and the charging time is shortened, so that the two level times of sub-pixel ① and sub-pixel ② with the same polarity are equal when they are charged, so that the brightness is uniform and the picture quality is improved.

[0036] In one embodiment of the present invention, the output enable signal is adjusted according to the panel architecture and the inversion method, including: according to the two level times when two sub-pixels with the same polarity are charged, the output enable signal is adjusted in phase based on the time that divides the two level times so that the two level times when two sub-pixels with the same polarity are equal. Figure 6In the embodiment, if the level time of sub-pixel ③ is too short, the level time of sub-pixel ③ and sub-pixel ④ can be equally divided, that is, the equally divided time of the two level times is taken as the standard, and the output enable signal OE adjusts the phase of the third high level to delay the charging end time of sub-pixel ③, thereby extending the charging time, and delay the charging start time of sub-pixel ④, thereby shortening the charging time, so that the two level times of sub-pixel ③ and sub-pixel ④ at the same polarity when charging are equal, so that the brightness is uniform and the image quality is improved.

[0037] In one embodiment of the present invention, Figure 6 As shown, according to the panel architecture and the inversion method, the output enable signal is adjusted, including: according to the two level times when the first sub-pixel and the second sub-pixel with the same polarity are charged, taking the smaller level time as the standard, the output enable signal is adjusted to increase the corresponding high level time, so that the two level times when the first sub-pixel and the second sub-pixel with the same polarity are equal; according to the two level times when the third sub-pixel and the fourth sub-pixel with the same polarity are charged, taking the equal-divided time of the two level times as the standard, the output enable signal adjusts the phase, so that the two level times when the third sub-pixel and the fourth sub-pixel with the same polarity are equal.

[0038] Understandably, Figure 6 In the example, when the source drive signal is charged, the rise time is less than the fall time. It can be easily imagined that the method steps when the rise time is greater than the fall time when the source drive signal is charged are: according to the two level times when the first sub-pixel and the second sub-pixel of the same polarity are charged, the two level times of the two level times are taken as the equal division time, and the output enable signal is adjusted to adjust the phase so that the two level times of the first sub-pixel and the second sub-pixel of the same polarity are equal; according to the two level times when the third sub-pixel and the fourth sub-pixel of the same polarity are charged, the smaller level time is taken as the basis, and the output enable signal is adjusted to increase the corresponding high level time so that the two level times of the third sub-pixel and the fourth sub-pixel of the same polarity are equal; this method step also belongs to the protection scope of the present application.

[0039] In one embodiment of the present invention, Figure 7As shown, according to the panel architecture and the inversion method, the output enable signal is adjusted, including: according to the two level times when the first sub-pixel and the second sub-pixel with the same polarity are charged, the output enable signal adjusts the phase based on the half-time of the two level times, so that the two level times when the first sub-pixel and the second sub-pixel with the same polarity are equal; according to the two level times when the third sub-pixel and the fourth sub-pixel with the same polarity are charged, the output enable signal adjusts the phase based on the half-time of the two level times, so that the two level times when the third sub-pixel and the fourth sub-pixel with the same polarity are equal.

[0040] Figure 8 is another specific flow chart of a method for driving a display panel according to an embodiment of the present invention.

[0041] In one embodiment of the present invention, Figure 8 As shown, the output enable signal is adjusted according to the panel architecture and the inversion method, including: adjusting the number of high levels of the output enable signal in the scanning period according to the panel architecture and the inversion method; judging whether the positive polarity level time is equal to the negative polarity level time; if they are not equal, the output enable signal adjusts the phase so that the two level times of two sub-pixels with the same polarity are equal; if they are equal, judging whether the holding time of the charging of adjacent sub-pixels is equal, if they are not equal, adjusting the high level time so that the level time of the adjacent sub-pixels when charging is equal.

[0042] For details, please also refer to Figure 8 , Fig. 9 and Fig.10 First, determine whether the abnormal image quality is caused by a charging problem. Then, if it is determined that the abnormal image quality is caused by a charging problem, adjust the output enable signal according to the panel architecture and inversion method. For example, if the panel architecture is a dual gate architecture and the inversion method is a 2dot inversion method, adjust the number of high levels of the output enable signal OE in the scanning cycle to 4. The number of high levels of the output enable signal OE in the scanning cycle can also be set according to other architectures and inversion methods. Then, determine whether the positive polarity level time is equal to the negative polarity level time. If it is determined that the positive polarity level time is not equal to the negative polarity level time, then as follows Fig. 9 As shown, the method of adjusting the phase of the output enable signal OE is adopted, specifically, the phase of the first high level and the third high level of the output enable signal OE is adjusted, so that the positive polarity level time is divided equally by sub-pixel ① and sub-pixel ②, and the negative polarity level time is divided equally by sub-pixel ③ and sub-pixel ④, so as to realize the equal division of the overall time of the waveform, so that the level time of adjacent sub-pixels when charging is equal. If it is determined that the positive polarity level time is equal to the negative polarity level time, then Fig.10As shown, the method of adjusting the high level time of the output enable signal OE is adopted, specifically, the time of the first high level and the third high level of the output enable signal OE is increased, which can delay the charging start time of sub-pixel ② and sub-pixel ④ accordingly, thereby shortening the charging time and making the level time of adjacent sub-pixels equal when charging. Finally, it can be determined whether the image quality is improved. If not, the above steps are restarted. According to the changes in the improvement of the image quality, the high level time and / or phase of the output enable signal OE can be adjusted accordingly, so that the level time of adjacent sub-pixels when charging is equal, thereby improving the image quality.

[0043] Based on the same inventive concept, an embodiment of the present invention further provides a timing controller, which is configured to execute the display panel driving method provided in the above embodiment. The implementation of the timing controller can refer to the embodiment of the display panel driving method, and the repeated parts will not be repeated.

[0044] In one embodiment of the present invention, the timing controller further includes a register storing at least one setting parameter of the number of high levels of the output enable signal in a scanning period, and / or a phase, and / or a high level time.

[0045] For example, Table 1 is a parameter setting table of the phase of the output enable signal in the scanning period. The corresponding phase of the output enable signal can be determined in Table 1 according to the corresponding code, and the corresponding phase can also be adjusted.

[0046] Table 1:

[0047] For example, Table 2 is a parameter setting table for the number of high levels of the output enable signal in a scanning cycle. The number of high levels of the output enable signal in a scanning cycle can be determined in Table 2 according to the corresponding code, and the corresponding number of high levels can also be adjusted.

[0048] Table 2:

[0049] Based on the same inventive concept, an embodiment of the present invention further provides a display device, which includes a timing controller as provided in the above embodiment. The implementation of the display device can refer to the above embodiment of the timing controller, and the repeated parts will not be repeated.

[0050] The display panel driving method, timing controller and display device of the present invention can determine whether the abnormal image quality is caused by charging problems; if so, the output enable signal is adjusted according to the panel structure and inversion method so that the level time of adjacent sub-pixels when charging is the same. Therefore, the shaking head problem caused by the different brightness of adjacent sub-pixels can be improved, the image quality can be improved, and the application ability of the display device in special scenes can be improved.

[0051] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the invention. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the invention without departing from the content of the technical solution of the invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for driving a display panel, characterized in that: include: Determine whether the abnormal image quality is caused by charging problems; If so, the output enable signal is adjusted according to the panel architecture and the inversion method so that the level time of adjacent sub-pixels during charging is the same; wherein, according to the rising edge of the output enable signal, the previous row of gate lines is closed, and according to the falling edge of the output enable signal, the next row of gate lines is opened, and during the opening period of the gate lines, the data lines charge the corresponding sub-pixels.

2. The method for driving a display panel according to claim 1, wherein: The adjusting of the output enable signal according to the panel architecture and the inversion mode includes: adjusting the number of high levels, and / or the phase, and / or the high level time of the output enable signal in a scanning cycle according to the panel architecture and the inversion mode.

3. The method for driving a display panel according to claim 1, wherein: The determining whether the abnormal image quality is caused by a charging problem includes: determining whether there is a problem with the image quality; if so, determining whether the waveform of the source drive signal is abnormal; if so, determining whether the abnormal waveform is caused by a non-charging problem; if not, determining that the abnormal image quality is caused by a charging problem.

4. The method for driving a display panel according to claim 1, wherein: The output enable signal is adjusted according to the panel architecture and the inversion mode, including: if the panel architecture is a dual gate architecture and the inversion mode is a 2dot inversion mode, the number of high levels of the output enable signal in a scanning period is adjusted to 4.

5. The method for driving a display panel according to claim 1, wherein: The output enable signal is adjusted according to the panel architecture and the inversion method, including: according to the two level times when two sub-pixels with the same polarity are charged, the smaller level time is used as the basis, and the output enable signal is adjusted to increase a corresponding high level time, so that the two level times when the two sub-pixels with the same polarity are charged are equal.

6. The method for driving a display panel according to claim 1, wherein: The output enable signal is adjusted according to the panel architecture and the inversion method, including: according to the two level times when two sub-pixels with the same polarity are charged, the output enable signal adjusts the phase based on the time that divides the two level times so that the two level times when two sub-pixels with the same polarity are equal.

7. The method for driving a display panel according to claim 1, wherein: The output enable signal is adjusted according to the panel architecture and the inversion mode, including: According to the panel architecture and the inversion mode, adjusting the number of high levels of the output enable signal in a scanning period; Determine whether the positive polarity level time is equal to the negative polarity level time; If they are not equal, the output enable signal adjusts the phase so that the two level times of the two sub-pixels with the same polarity are equal; If they are equal, it is determined whether the charging holding time of adjacent sub-pixels is equal. If they are not equal, the high level time is adjusted to make the level time of adjacent sub-pixels equal.

8. A timing controller, characterized in that: The device is configured to execute the method for driving a display panel according to any one of claims 1 to 7.

9. The timing controller according to claim 8, characterized in that: A register is included, and the register stores at least one setting parameter of the number of high levels of the output enable signal in a scanning period, and / or a phase, and / or a high level time.

10. A display device, characterized in that: The display device comprises the timing controller according to any one of claims 8 to 9.

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