A brightness adjustment method and device for a display panel

Abstract

The present invention discloses a method and device for adjusting the brightness of a display panel. The brightness adjustment method includes: obtaining an initial duty ratio of a light emission control signal; using the initial duty ratio as an adjustment initial value, sequentially adjusting the duty ratio of the light emission control signal of each display panel to be adjusted, so that the brightness change value when each display panel to be adjusted displays a picture at a first set frequency is less than a preset value. The present invention provides a method and device for adjusting the brightness of a display panel, which improves the display effect of the display panel.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a method and a device for adjusting the brightness of a display panel. Background Art

[0002] With the increasingly wide application of OLED (Organic Light-Emitting Diode) display panels in mobile phones, tablets, and notebook products, the terminal has higher and higher requirements for the power consumption of OLED display panels. The LTPO (Low Temperature Polycrystalline Oxide) technology has emerged as the times require, but the display effect of the display panel during application is not good. Summary of the Invention

[0003] The present invention provides a method and a device for adjusting the brightness of a display panel, which improve the display effect of the display panel.

[0004] According to one aspect of the present invention, there is provided a method for adjusting the brightness of a display panel, the brightness adjustment method comprising:

[0005] Obtaining an initial duty ratio of a light emission control signal;

[0006] Taking the initial duty ratio as an adjustment initial value, and sequentially adjusting the duty ratio of the light emission control signal of each display panel to be adjusted, so that the brightness change value of each display panel to be adjusted when displaying a picture at a first set frequency is less than a preset value.

[0007] Optionally, the display panel to be adjusted includes a plurality of different brightness modes, the minimum display brightness corresponding to different brightness modes is the same, and the maximum display brightness corresponding to different brightness modes is different;

[0008] The taking the initial duty ratio as an adjustment initial value, and sequentially adjusting the duty ratio of the light emission control signal of each display panel to be adjusted, so that the brightness change value of each display panel to be adjusted when displaying a picture at a first set frequency is less than a preset value, includes:

[0009] For each display panel to be adjusted, sequentially adjusting the duty ratio of the light emission control signal corresponding to different brightness modes, so that the brightness change value of the display panel to be adjusted in different brightness modes when displaying a picture at the first set frequency is less than the preset value.

[0010] Optionally, the obtaining an initial duty ratio of a light emission control signal includes:

[0011] Obtain the sub-initial duty ratios of the light-emitting control signals corresponding to multiple different brightness modes, where each brightness mode corresponds to a sub-initial duty ratio;

[0012] For each of the to-be-adjusted display panels, sequentially adjust the duty ratios of the light-emitting control signals corresponding to different brightness modes, so that the brightness change values of the to-be-adjusted display panel when displaying a picture at the first set frequency in different brightness modes are all less than a preset value, including:

[0013] For each brightness mode, use the sub-initial duty ratio corresponding to this brightness mode as the adjustment initial value.

[0014] Optionally, for each to-be-adjusted display panel, sequentially adjust the duty ratios of the light-emitting control signals corresponding to different brightness modes, including:

[0015] Select n different brightness modes for adjustment for each to-be-adjusted display panel, where n is less than the total number of brightness modes of the to-be-adjusted display panel;

[0016] Use an interpolation algorithm to determine the duty ratio of the light-emitting control signal corresponding to the brightness mode that has not been adjusted.

[0017] Optionally, for each to-be-adjusted display panel, sequentially adjust the duty ratios of the light-emitting control signals corresponding to different brightness modes, including:

[0018] Adjust the duty ratio of the light-emitting control signal based on at least one set gray level for each brightness mode; among them, the values of the set gray levels used in at least some brightness modes are different.

[0019] Optionally, the obtaining of the initial duty ratio of the light-emitting control signal includes:

[0020] Obtain the duty ratios of the light-emitting control signals of a set number of preset display panels; where the preset display panels are the same type of display panel as the to-be-adjusted display panel;

[0021] Determine the average value of the duty ratios of the light-emitting control signals of the set number of preset display panels as the initial duty ratio, where the set number is greater than 1.

[0022] Optionally, using the initial duty ratio as the adjustment initial value, sequentially adjust the duty ratios of the light-emitting control signals of each to-be-adjusted display panel, so that the brightness change value of each to-be-adjusted display panel when displaying a picture at the first set frequency is less than a preset value, including:

[0023] Adjust the duty ratios of the light-emitting control signals when each to-be-adjusted display panel displays a picture at at least two different first set frequencies;

[0024] For the unregulated frequency, an interpolation algorithm is used to determine the duty cycle of its light emission control signal.

[0025] Optionally, the first set frequency is less than or equal to 10 Hz.

[0026] Optionally, the brightness adjustment method provided in this embodiment further includes:

[0027] Determine the duty cycle of the light emission control signal corresponding to the second set frequency according to the duty cycle of the light emission control signal corresponding to the first set frequency, where the second set frequency is greater than 10 Hz.

[0028] According to another aspect of the present invention, there is provided a brightness adjustment device for a display panel, the brightness adjustment device including a duty cycle acquisition module and a duty cycle adjustment module;

[0029] The duty cycle acquisition module is used to acquire the initial duty cycle of the light emission control signal;

[0030] The duty cycle adjustment module is used to use the initial duty cycle as the adjustment initial value, and sequentially adjust the duty cycle of the light emission control signal of each display panel to be adjusted, so that the brightness change value when each display panel to be adjusted displays a picture at the first set frequency is less than a preset value.

[0031] This embodiment provides a brightness adjustment method for a display panel. The brightness adjustment method includes: first acquiring the initial duty cycle of the light emission control signal, and then using the initial duty cycle as the adjustment initial value to separately adjust the duty cycle of the light emission control signal of each display panel to be adjusted when displaying a picture at the first set frequency, so that the brightness change value corresponding to the adjusted duty cycle of the light emission control signal is less than a preset value. At the first set frequency, the duty cycle of the light emission control signal of each display panel to be adjusted is separately adjusted, so that the brightness change value of each adjusted display panel to be adjusted is less than a preset value, improving the display effect of the display panel.

[0032] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1It is a schematic flowchart of a method for adjusting the brightness of a display panel according to an embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of the test results of a method for adjusting the brightness of a display panel according to an embodiment of the present invention;

[0036] Figure 3 It is a schematic structural diagram of a device for adjusting the brightness of a display panel according to an embodiment of the present invention. Detailed implementation manners

[0037] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0039] Figure 1 It is a schematic flowchart of a method for adjusting the brightness of a display panel according to an embodiment of the present invention. Refer to Figure 1 , the brightness adjustment method includes the following steps:

[0040] S110. Obtain the initial duty ratio of the light emission control signal.

[0041] Specifically, the display panel includes a plurality of light-emitting units. The light-emitting control signal is used to control the light-emitting duration of the light-emitting units within one frame of the picture. The duty ratio of the light-emitting control signal is the ratio of the light-emitting duration of the light-emitting units within one frame of the picture to the total duration of one frame of the picture. The initial duty ratio can be set according to experience, or can be obtained by adjusting the light-emitting control signal of the preset display panel. When the brightness change value of the preset display panel meets the requirements, the duty ratio of the light-emitting control signal of the preset display panel is used as the initial duty ratio. Exemplarily, the duty ratio of the light-emitting control signal of a preset display panel can be used as the initial duty ratio, or the average value of the duty ratios of the light-emitting control signals of multiple preset display panels can be used as the initial duty ratio. The preset display panel and the display panel to be adjusted can be the same type of display panel. Based on the initial duty ratio of the same type of display panel, adjusting the duty ratio of the light-emitting control signal of the display panel to be adjusted can shorten the time for adjusting the duty ratio of the light-emitting control signal of the display panel to be adjusted and improve the adjustment efficiency.

[0042] S120. Taking the initial duty ratio as the adjustment initial value, sequentially adjust the duty ratio of the light-emitting control signal of each display panel to be adjusted, so that the brightness change value when each display panel to be adjusted displays the picture at the first set frequency is less than the preset value.

[0043] Specifically, when the display panel to be adjusted displays one frame of the picture, if the brightness change of the light-emitting units is large, the display panel to be adjusted will flicker, and the user can observe the brightness change of the display picture, which affects the display effect of the display panel. The brightness change value can be the difference between the maximum brightness and the minimum brightness when the display panel to be adjusted displays one frame of the picture. The brightness size of the display panel to be adjusted when displaying one frame of the picture can be detected by an optical device, so as to determine the brightness change value. When the brightness change value is less than the preset value, the user is not easily aware of the brightness change of the display panel to be adjusted.

[0044] In addition, since the brightness change of the display panel to be adjusted is more serious when the display panel to be adjusted displays the picture at a relatively small frequency than when it displays the picture at a relatively large frequency, the first set frequency can be a relatively small display frequency. Exemplarily, the first set frequency can be less than or equal to 10 Hz.

[0045] When adjusting the duty ratio of the light emission control signal of the display panel to be adjusted, the brightness change value when the duty ratio of the light emission control signal of the display panel to be adjusted is equal to the initial adjustment value can be detected first. If the brightness change value corresponding to the initial adjustment value is less than the preset value, the initial adjustment value is used as the duty ratio of the light emission control signal of the display panel to be adjusted. If the brightness change value corresponding to the initial adjustment value is greater than the preset value, the duty ratio of the light emission control signal of the display panel to be detected can be set as the initial adjustment value plus a set value, and it is detected whether the brightness change value of the display panel to be adjusted is less than the preset value. If it is not less than, the duty ratio of the light emission control signal of the display panel to be detected is continuously increased by the set value until the brightness change value of the display panel to be adjusted is less than the preset value. Then, the duty ratio of the light emission control signal of another display panel to be adjusted is adjusted by the same method. The set value can be equal to ±0.2% of the initial duty ratio.

[0046] The inventor found through research that in the existing technology, a set of duty ratios of the light emission control signal is adopted for different display panels. However, due to the differences between different display panels, the brightness change degrees of different display panels are inconsistent after adopting the same duty ratio of the light emission control signal, resulting in a large brightness change for some display panels, which affects the display effect of the display panel.

[0047] In this embodiment, the duty ratio of the light emission control signal of each display panel to be adjusted is adjusted separately, rather than sharing a set of duty ratios of the light emission control signal for different display panels to be adjusted. Thus, the brightness change value of each display panel to be adjusted when displaying a picture at the first set frequency is less than the preset value, and the brightness change values of each display panel to be adjusted at the same first set frequency are relatively close. Figure 2 FIG. is a schematic diagram of the test results of a method for adjusting the brightness of a display panel provided by an embodiment of the present invention. Refer to Figure 2 , Figure 2 In, the abscissa represents the gray scale, and the ordinate represents the brightness change value. Figure 2 shows the brightness change values of five different display panels to be adjusted at the first set frequency. As can be seen from Figure 2 , by using the brightness adjustment method provided by this embodiment, the brightness change values of different display panels to be adjusted at the same gray scale can be relatively close. By using the brightness adjustment method provided by this embodiment, the brightness change value of each display panel to be adjusted can be less than the preset value.

[0048] This embodiment provides a method for adjusting the brightness of a display panel. The brightness adjustment method includes: first obtaining the initial duty ratio of the light-emitting control signal, and then using the initial duty ratio as the adjustment initial value to adjust the duty ratio of the light-emitting control signal of each display panel to be adjusted when displaying a picture at a first set frequency, so that the brightness change value corresponding to the adjusted duty ratio of the light-emitting control signal is less than a preset value. At the first set frequency, the duty ratio of the light-emitting control signal of each display panel to be adjusted is adjusted separately, so that the brightness change value of each display panel to be adjusted after adjustment is less than the preset value, thereby making the brightness change degree of each display panel to be adjusted relatively consistent. The brightness adjustment method of the display panel provided by this embodiment solves the problem that the brightness of the display panel changes greatly when displaying at a relatively low frequency, and improves the display effect of the display panel.

[0049] Optionally, the display panel to be adjusted includes multiple different brightness modes, the minimum display brightness corresponding to different brightness modes is the same, and the maximum display brightness corresponding to different brightness modes is different;

[0050] Taking the initial duty ratio as the adjustment initial value, adjusting the duty ratio of the light-emitting control signal of each display panel to be adjusted in sequence, so that the brightness change value of each display panel to be adjusted when displaying a picture at the first set frequency is less than the preset value, includes:

[0051] For each display panel to be adjusted, adjusting the duty ratio of the light-emitting control signal corresponding to different brightness modes in sequence, so that the brightness change value of the display panel to be adjusted when displaying a picture at the first set frequency in different brightness modes is less than the preset value.

[0052] Specifically, in different brightness modes, adjusting the duty ratio of the light-emitting control signal of the display panel to be adjusted, so that the brightness change value of the display panel to be adjusted in different brightness modes is less than the preset value, so that the display panel to be adjusted has a good display effect in different brightness modes.

[0053] Different brightness modes correspond to different brightness ranges. The brightness ranges corresponding to different brightness modes can include 0 - 0.2 nit, 0 - 2 nit, 0 - 5 nit, 0 - 30 nit, 0 - 50 nit, and 0 - 100 nit, etc. When adjusting the duty cycle of the light emission control signal of the display panel to be adjusted, several different brightness modes can be selected for adjustment. Exemplarily, the selected brightness modes are 0 - 0.2 nit, 0 - 2 nit, 0 - 5 nit, 0 - 30 nit. In the brightness mode of 0 - 0.2 nit, the brightness change value when adjusting the display panel to be adjusted to display a picture at the first set frequency is less than the preset value. In the brightness mode of 0 - 2 nit, the brightness change value when adjusting the display panel to be adjusted to display a picture at the first set frequency is less than the preset value. In the brightness mode of 0 - 5 nit, the brightness change value when adjusting the display panel to be adjusted to display a picture at the first set frequency is less than the preset value. In the brightness mode of 0 - 30 nit, the brightness change value when adjusting the display panel to be adjusted to display a picture at the first set frequency is less than the preset value. After the duty cycle of the light emission control signal of one display panel to be adjusted in different brightness modes is adjusted, then adjust the duty cycle of the light emission control signal of the other display panel to be adjusted in different brightness modes.

[0054] In addition, when adjusting the duty cycle of the light emission control signal of the display panel to be adjusted in different brightness modes, these brightness modes can be numbered. They can be numbered in descending order according to the magnitude of the maximum brightness in these brightness modes, or numbered in other orders, and then adjusted in descending or ascending order according to the numbers.

[0055] Optionally, obtaining the initial duty cycle of the light emission control signal includes: obtaining the sub-initial duty cycles of the light emission control signals corresponding to multiple different brightness modes, where each brightness mode corresponds to a sub-initial duty cycle;

[0056] For each display panel to be adjusted, sequentially adjusting the duty cycle of the light emission control signal corresponding to different brightness modes so that the brightness change value when the display panel to be adjusted displays a picture at the first set frequency in different brightness modes is less than the preset value, includes:

[0057] For each brightness mode, use the sub-initial duty cycle corresponding to this brightness mode as the adjustment initial value.

[0058] Specifically, since the duty ratios of the emission control signals in different brightness modes may be different, sub-initial duty ratios can be set for different brightness modes respectively. When adjusting the display panel to be adjusted, for each brightness mode, the sub-initial duty ratio corresponding to this brightness mode is used as the adjustment initial value. Exemplarily, when adjusting the display panel to be adjusted in the 0-0.2 nit brightness mode, the sub-initial duty ratio in the 0-0.2 nit brightness mode is used as the adjustment initial value. For each brightness mode, using the sub-initial duty ratio corresponding to this brightness mode as the adjustment initial value can further shorten the adjustment time and improve the adjustment efficiency.

[0059] Optionally, for each display panel to be adjusted, sequentially adjusting the duty ratios of the emission control signals corresponding to different brightness modes includes:

[0060] Selecting n different brightness modes for adjustment for each display panel to be adjusted, where n is less than the total number of brightness modes of the display panel to be adjusted;

[0061] Using an interpolation algorithm to determine the duty ratio of the emission control signal corresponding to the brightness mode that has not been adjusted.

[0062] Specifically, the duty ratio of the emission control signal in the brightness mode that has not been adjusted is determined according to the duty ratios of the emission control signals in the brightness modes that have been adjusted. The interpolation algorithm can include linear interpolation and non-linear interpolation, etc., and this embodiment does not make specific limitations. Exemplarily, if the brightness mode that has not been adjusted is 0-4 nit, and the brightness modes that have been adjusted are 0-0.2 nit, 0-2 nit, 0-5 nit, 0-30 nit, then the duty ratio of the emission control signal in the brightness mode of 0-2 nit and the duty ratio of the emission control signal in the brightness mode of 0-5 nit can be selected to calculate the duty ratio of the emission control signal in the brightness mode of 0-4 nit by linear interpolation algorithm. Interpolating to determine the duty ratio of the emission control signal in the brightness mode that has not been adjusted according to the duty ratios of the emission control signals in the brightness modes that have been adjusted can make the duty ratio of the emission control signal in the unadjusted brightness mode better adapted to this brightness mode, and can better reduce the brightness change value of the display panel to be adjusted in this brightness mode. In addition, using the interpolation algorithm can shorten the adjustment time for adjusting the duty ratio of the emission control signal of the display panel to be adjusted and improve the adjustment efficiency.

[0063] Optionally, for each display panel to be adjusted, sequentially adjusting the duty ratios of the emission control signals corresponding to different brightness modes includes:

[0064] Adjusting the duty ratio of the emission control signal based on at least one set gray level for each brightness mode; where the values of the set gray levels used in at least some brightness modes are different.

[0065] Specifically, the set gray level can be a gray level with a relatively large brightness change value in a brightness mode. In a brightness mode, at least one set gray level is selected to adjust the duty cycle of the light emission control signal, which can shorten the adjustment time and improve the adjustment efficiency. Since the gray levels corresponding to the maximum brightness change values are not equal in different brightness modes, at least some of the set gray levels used in different brightness modes have different values. The gray level with the largest brightness change value in each brightness mode can be used as the set gray level for that brightness mode, and finally, the brightness change values in different brightness modes can be adjusted to the optimal values.

[0066] Optionally, obtaining the initial duty cycle of the light emission control signal includes:

[0067] Obtaining the duty cycles of the light emission control signals of a set number of preset display panels; wherein, the preset display panels and the display panel to be adjusted are of the same type of display panel;

[0068] Determining the average value of the duty cycles of the light emission control signals of the set number of preset display panels as the initial duty cycle, where the set number is greater than 1.

[0069] Specifically, the set number can be set as needed. Exemplarily, the set number can be greater than or equal to 10, such as the set number can be 10, 15, 20, 30, or 40, etc. Using the average value of the duty cycles of the light emission control signals of the preset display panels with the set number as the initial duty cycle can avoid contingency and improve the accuracy of the initial duty cycle. The preset display panels and the display panel to be adjusted can be display panels produced in the same batch.

[0070] Optionally, with the initial duty cycle as the adjustment initial value, the duty cycle of the light emission control signal of each display panel to be adjusted is adjusted in sequence so that the brightness change value when each display panel to be adjusted displays a picture at a first set frequency is less than a preset value, including:

[0071] Adjusting the duty cycles of the light emission control signals when each display panel to be adjusted displays a picture at at least two different first set frequencies;

[0072] Determining the duty cycle of its light emission control signal for the unadjusted frequency using an interpolation algorithm.

[0073] Specifically, the interpolation algorithm can be linear interpolation, non-linear interpolation, etc., and this embodiment does not make specific limitations. Adjusting the duty cycle of the light emission control signal of the display panel to be adjusted at multiple first set frequencies can make the brightness change values of the display panel to be adjusted when displaying pictures at multiple first set frequencies less than the preset value, reduce the brightness change of the display panel to be adjusted when displaying pictures at multiple first set frequencies, and further improve the display effect of the display panel to be adjusted. Using the linear interpolation algorithm to determine the duty cycle of its light emission control signal for the unadjusted frequency can shorten the time for adjusting the duty cycle of the light emission control signal and improve the adjustment efficiency.

[0074] Optionally, the first set frequency is less than or equal to 10 Hz.

[0075] Specifically, when the frequency of the display panel is lower than 10 Hz, the screen flashing phenomenon is relatively serious. In this embodiment, setting the first set frequency to be less than or equal to 10 Hz can better improve the problem of large brightness change of the display panel.

[0076] Optionally, the brightness adjustment method provided in this embodiment further includes: determining the duty cycle of the light emission control signal corresponding to the second set frequency according to the duty cycle of the light emission control signal corresponding to the first set frequency, where the second set frequency is greater than 10 Hz.

[0077] Specifically, in the same brightness mode, the duty cycle of the light emission control signal corresponding to the second set frequency can be the same as the duty cycle of the light emission control signal corresponding to the first set frequency. Exemplarily, if the second set frequency is 60 Hz, then in the same brightness mode, the duty cycle of the light emission control signal corresponding to the refresh frequency of 60 Hz can be the same as the duty cycle of the light emission control signal corresponding to any first set frequency, and the duty cycle of the light emission control signal corresponding to the refresh frequency of 60 Hz can also be the same as the duty cycle of the light emission control signal corresponding to the maximum first set frequency.

[0078] Figure 3 is a schematic structural diagram of a brightness adjustment device for a display panel according to an embodiment of the present invention. Refer to Figure 3 , the brightness adjustment device includes a duty cycle acquisition module 110 and a duty cycle adjustment module 120; the duty cycle acquisition module 110 is used to acquire the initial duty cycle of the light emission control signal; the duty cycle adjustment module 120 is used to use the initial duty cycle as the adjustment initial value to sequentially adjust the duty cycle of the light emission control signal of each display panel to be adjusted, so that the brightness change value of each display panel to be adjusted when displaying pictures at the first set frequency is less than the preset value.

[0079] Optionally, the display panel to be adjusted includes multiple different brightness modes, the minimum display brightness corresponding to different brightness modes is the same, and the maximum display brightness corresponding to different brightness modes is different;

[0080] The duty cycle adjustment module is specifically configured to adjust the duty cycle of the light emission control signals corresponding to different brightness modes for each display panel to be adjusted, so that the brightness change values of the display panel to be adjusted when displaying a picture at a first set frequency in different brightness modes are all less than a preset value.

[0081] Optionally, the duty cycle acquisition module 110 is specifically configured to acquire sub-initial duty cycles of the light emission control signals corresponding to multiple different brightness modes, where each brightness mode corresponds to a sub-initial duty cycle;

[0082] The duty cycle adjustment module 120 is specifically configured to use the sub-initial duty cycle corresponding to each brightness mode as the adjustment initial value for each brightness mode.

[0083] Optionally, the duty cycle adjustment module 120 includes a duty cycle adjustment unit and a first interpolation unit;

[0084] The duty cycle adjustment unit is configured to adjust n different brightness modes for each display panel to be adjusted, where n is less than the total number of brightness modes of the display panel to be adjusted;

[0085] The first interpolation unit is configured to use an interpolation algorithm to determine the duty cycle of the light emission control signal corresponding to the brightness mode that has not been adjusted.

[0086] Optionally, the duty cycle adjustment module is specifically configured to adjust the duty cycle of the light emission control signal based on at least one set gray level for each brightness mode; where the values of the set gray levels used for at least some brightness modes are different.

[0087] Optionally, the duty cycle acquisition module includes a set duty cycle acquisition unit and an initial duty cycle determination unit;

[0088] The set duty cycle acquisition unit is configured to acquire the duty cycles of the light emission control signals of a set number of preset display panels; where the preset display panels are the same type of display panel as the display panel to be adjusted;

[0089] The initial duty cycle determination unit is configured to determine the average value of the duty cycles of the light emission control signals of the set number of preset display panels as the initial duty cycle, where the set number is greater than 1.

[0090] Optionally, the duty cycle adjustment module includes a first adjustment unit and a second interpolation unit;

[0091] The first adjustment unit is configured to adjust the duty cycles of the light emission control signals when each display panel to be adjusted displays a picture at at least two different first set frequencies;

[0092] The second interpolation unit is configured to use an interpolation algorithm to determine the duty cycle of its light emission control signal for the unadjusted frequency.

[0093] Optionally, the duty cycle adjustment module is further configured to determine the duty cycle of the light emission control signal corresponding to the second set frequency according to the duty cycle of the light emission control signal corresponding to the first set frequency, and the second set frequency is greater than 10 Hz.

[0094] The brightness adjustment device of the display panel provided by the embodiments of the present invention has corresponding beneficial effects with the brightness adjustment method of the display panel provided by any embodiment of the present invention. The technical details not elaborated in this embodiment are elaborated in the brightness adjustment method of the display panel provided by any embodiment of the present invention.

[0095] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps recited in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0096] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for adjusting the brightness of a display panel, characterized in that, Including: Obtaining an initial duty ratio of a light emission control signal; Taking the initial duty ratio as an adjustment initial value, and sequentially adjusting the duty ratio of the light emission control signal of each display panel to be adjusted, so that the brightness change value when each display panel to be adjusted displays a picture at a first set frequency is less than a preset value; The display panel to be adjusted includes a plurality of different brightness modes, the minimum display brightness corresponding to different brightness modes is the same, and the maximum display brightness corresponding to different brightness modes is different; The taking the initial duty ratio as an adjustment initial value, and sequentially adjusting the duty ratio of the light emission control signal of each display panel to be adjusted, so that the brightness change value when each display panel to be adjusted displays a picture at a first set frequency is less than a preset value, includes: For each display panel to be adjusted, sequentially adjusting the duty ratio of the light emission control signal corresponding to different brightness modes, so that the brightness change value when the display panel to be adjusted displays a picture at the first set frequency in different brightness modes is less than the preset value.

2. The brightness adjustment method according to claim 1, characterized in that, The obtaining an initial duty ratio of a light emission control signal includes: Obtaining sub-initial duty ratios of light emission control signals respectively corresponding to a plurality of different brightness modes, wherein each brightness mode corresponds to a sub-initial duty ratio; The for each display panel to be adjusted, sequentially adjusting the duty ratio of the light emission control signal corresponding to different brightness modes, so that the brightness change value when the display panel to be adjusted displays a picture at the first set frequency in different brightness modes is less than the preset value, includes: For each brightness mode, taking the sub-initial duty ratio corresponding to this brightness mode as an adjustment initial value.

3. The brightness adjustment method according to claim 1, characterized in that, For each display panel to be adjusted, sequentially adjusting the duty ratio of the light emission control signal corresponding to different brightness modes, includes: Selecting n different brightness modes for adjustment for each display panel to be adjusted, where n is less than the total number of brightness modes of the display panel to be adjusted; Determining the duty ratio of the light emission control signal corresponding to the unadjusted brightness mode by using an interpolation algorithm.

4. The brightness adjustment method according to claim 1, characterized in that, For each display panel to be adjusted, sequentially adjusting the duty ratio of the light emission control signal corresponding to different brightness modes, includes: Adjusting the duty ratio of the light emission control signal based on at least one set gray level for each brightness mode; wherein, the values of the set gray levels adopted by at least some brightness modes are different.

5. The brightness adjustment method according to claim 1, characterized in that, The obtaining an initial duty ratio of a light emission control signal, includes: Obtaining the duty ratios of the light emission control signals of a set number of preset display panels; wherein, the preset display panels and the display panels to be adjusted are of the same type of display panel; Determining the average value of the duty ratios of the light emission control signals of the set number of preset display panels as the initial duty ratio, where the set number is greater than 1.

6. The brightness adjustment method according to claim 1, characterized in that, Taking the initial duty ratio as an adjustment initial value, and sequentially adjusting the duty ratio of the light emission control signal of each display panel to be adjusted, so that the brightness change value when each display panel to be adjusted displays a picture at a first set frequency is less than a preset value, includes: Adjust the duty cycle of the light emission control signal when at least two different first set frequencies of display screens are used for each display panel to be adjusted; Determine the duty cycle of the light emission control signal for the unadjusted frequency using an interpolation algorithm.

7. The brightness adjustment method according to claim 1, characterized in that, The first set frequency is less than or equal to 10 Hz.

8. The brightness adjustment method according to claim 7, characterized in that, It further includes: Determine the duty cycle of the light emission control signal corresponding to the second set frequency according to the duty cycle of the light emission control signal corresponding to the first set frequency, and the second set frequency is greater than 10 Hz.

9. A device for adjusting the brightness of a display panel, characterized in that, It includes a duty cycle acquisition module and a duty cycle adjustment module; The duty cycle acquisition module is used to acquire the initial duty cycle of the light emission control signal; The duty cycle adjustment module is used to use the initial duty cycle as the adjustment initial value, and sequentially adjust the duty cycle of the light emission control signal of each display panel to be adjusted, so that the brightness change value of each display panel to be adjusted when displaying a screen at the first set frequency is less than a preset value; The display panel to be adjusted includes multiple different brightness modes, the minimum display brightness corresponding to different brightness modes is the same, and the maximum display brightness corresponding to different brightness modes is different; The duty cycle adjustment module is specifically used to, for each display panel to be adjusted, sequentially adjust the duty cycle of the light emission control signal corresponding to different brightness modes, so that the brightness change value of the display panel to be adjusted when displaying a screen at the first set frequency in different brightness modes is less than a preset value.

Images