Method and system for improving low-light refresh rate of display screen

Abstract

The invention discloses a method and system for improving the low-brightness refresh rate of a display screen. The method comprises the steps that the brightness of the display screen is set to be the maximum brightness, the maximum current gain is kept unchanged, the gray scales of the display screen are changed, display parameters of all the gray scales of the display screen are detected, and each gray scale corresponds to a set of display parameters; the current gain of the display screen is gradually reduced from the maximum current gain, the calibration matrix is calculated once every time the current gain of the display screen is reduced, and the current gain j of each order of the display screen corresponds to one calibration matrix; and selecting a display screen current gain matched with the current picture according to the current picture of the display screen, and adjusting the display screen according to the calibration matrix corresponding to the current gain. According to the invention, by selecting the parameter with lower maximum brightness, the change rate of the gray scale is reduced, so that the picture change is softer, the refresh rate of the picture is improved, and the problems of eyestrain and the like caused by low refresh rate of the picture of a user are prevented.

Description

Technical Field

[0001] The present invention relates to the field of LED display technology, and in particular to a method and system for improving the low-brightness refresh rate of a display screen. Background Art

[0002] The refresh rate of LED display is controlled by the driver chip. Although the refresh rate of the driver chip can reach 3840Hz or 7680Hz, this value can only be achieved when the display is at maximum brightness. As the brightness of the display decreases, the refresh rate of the display will also decrease due to the rapid decrease of grayscale.

[0003] Assume that the maximum brightness of a display screen is 600nit, and the indoor scene is usually within 300nit, and some pictures are even only 50nit. At this time, the refresh rate of the display screen under the picture is too low. Watching the picture with a low refresh rate will cause eyes to quickly fatigue and unable to work continuously. Sometimes it may even cause dizziness, eye pain and other discomfort symptoms. Therefore, there is a need for a method that can still ensure the refresh rate when the brightness of the LED display screen is low. Summary of the invention

[0004] To solve the above problems, the present invention provides a method for improving the low-brightness refresh rate of a display screen. By calculating a calibration matrix using the display effects at different current gains of the screen, unified adjustments are made according to the calibration matrix, thereby solving the problem of too low refresh rate at low brightness in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for improving the low-brightness refresh rate of a display screen, comprising the following steps:

[0006] S1. Set the brightness of the display screen to the maximum brightness, record the current gain of the display screen as the maximum current gain, keep the current gain of the display screen at the maximum current gain, change the grayscale of the display screen from the maximum grayscale, use a spectrophotometer to detect the display parameters of all grayscales of the display screen, each grayscale corresponds to a set of display parameters, record the display parameter set of all grayscales at this time as T0;

[0007] S2. Starting from the maximum current gain, the current gain of the display screen is gradually reduced. Each time the current gain of the display screen is reduced, a calibration matrix is ​​calculated according to the display parameter set T0. Each level of display screen current gain j corresponds to a calibration matrix M. j , until the current gain drops to 0, stop calculating the calibration matrix;

[0008] S3. According to the current screen of the display, select the current gain that matches the current screen, and according to the calibration matrix M corresponding to the current gain j Make adjustments to the display.

[0009] Furthermore, the display parameters include brightness and color temperature.

[0010] Furthermore, in step S1, the display parameters of all grayscales of the display screen are detected by using a spectrocolorimeter, the grayscale i ranges from 1 to 65535, and for each grayscale i, the brightness L of the display screen is measured by using a spectrocolorimeter. i , and color temperature t i (x i ,y i ).

[0011] Furthermore, in step S2, the current gain of the display screen is gradually reduced starting from the maximum current gain, and the specific implementation method is: the current gain of the display screen is proportionally reduced from the maximum current gain.

[0012] Furthermore, the ratio is 10%.

[0013] Further, in step S2, the calibration matrix is ​​calculated once according to the display parameter set T0, and the specific implementation method is as follows: after each reduction of the display current gain, according to the ratio of the current gain at this time to the maximum current gain of the display, the maximum gray scale is multiplied by the ratio to obtain the calibration gray scale, and the maximum brightness L of the display at this time is detected by the spectrophotometer. j , and color temperature t j (x j ,y j ) until the maximum brightness of the display is L j and color temperature t j The brightness L corresponding to the calibration grayscale i and color temperature t i The same, the adjustment coefficient is the calibration matrix M j .

[0014] Furthermore, the display parameters also include chromaticity z, and the specific formula of the calibration matrix is:

[0015]

[0016] Among them, R, G, B are the values ​​of the red, green, and blue channels, RX D is the target value, RX D is the original value measured by the spectrocolorimeter, z is the chromaticity, Y D =L i , Y O =L j ,

[0017] Furthermore, the current gain that matches the current picture is selected, and its specific implementation method is: the current maximum brightness Lumi is calculated according to the current picture and the current display brightness, and the current gain whose maximum brightness is closest to the current maximum brightness Lumi is selected.

[0018] Through the above technical scheme, the present invention has the following beneficial effects: obtaining display parameters of different grayscales at maximum brightness, and then adjusting the power circuit gain and calibrating according to the display parameters, so as to adjust the screen in real time under low brightness conditions, so as to reduce the grayscale decrease speed while maintaining the display effect, thereby ensuring the screen refresh rate and improving the user's visual experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic diagram of the overall process of a method for improving the low-brightness refresh rate of a display screen.

[0020] Figure 2 A schematic diagram of the structure of a system for improving the low-brightness refresh rate of a display screen provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1

[0024] See also Figure 1 , a method for improving the low-brightness refresh rate of a display screen, comprising the following steps:

[0025] S1. Set the brightness of the display screen to the maximum brightness, record the current gain of the display screen as the maximum current gain, keep the current gain of the display screen at the maximum current gain, change the grayscale of the display screen from the maximum grayscale, use a spectrophotometer to detect the display parameters of all grayscales of the display screen, each grayscale corresponds to a set of display parameters, record the display parameter set of all grayscales at this time as T0;

[0026] S2. Starting from the maximum current gain, the current gain of the display screen is gradually reduced. Each time the current gain of the display screen is reduced, a calibration matrix is ​​calculated according to the display parameter set T0. Each level of display screen current gain j corresponds to a calibration matrix M.j , until the current gain drops to 0, stop calculating the calibration matrix;

[0027] S3. According to the current screen of the display, select the current gain that matches the current screen, and according to the calibration matrix M corresponding to the current gain j Make adjustments to the display.

[0028] Furthermore, the display parameters include brightness and color temperature.

[0029] The brightness refers to the intensity of light emitted by the screen, which determines the visual brightness of the image or text on the screen. The color temperature is a unit of measurement for the color components contained in the light. The above display parameters are measured for subsequent picture calibration.

[0030] Furthermore, in step S1, the display parameters of all grayscales of the display screen are detected by using a spectrocolorimeter, the grayscale i ranges from 1 to 65535, and for each grayscale i, the brightness L of the display screen is measured by using a spectrocolorimeter. i , and color temperature t i (x i ,y i ).

[0031] Grayscale refers to the different brightness levels of pixels in digital images from darkest to brightest. Therefore, under the same current gain, different grayscale sizes will result in different brightness displayed on the screen. When the grayscale reaches the maximum, the screen can display the maximum brightness.

[0032] Furthermore, in step S2, the current gain of the display screen is gradually reduced starting from the maximum current gain, and the specific implementation method is: the current gain of the display screen is proportionally reduced from the maximum current gain.

[0033] Furthermore, the ratio is 10%.

[0034] Select a suitable ratio to gradually reduce the current gain. Different current gains correspond to different maximum brightness to adapt to different pictures.

[0035] Further, in step S2, the calibration matrix is ​​calculated once according to the display parameter set T0, and the specific implementation method is as follows: after each reduction of the display current gain, according to the ratio of the current gain at this time to the maximum current gain of the display, the maximum gray scale is multiplied by the ratio to obtain the calibration gray scale, and the maximum brightness L of the display at this time is detected by the spectrophotometer. j , and color temperature t j (x j ,y j ) until the maximum brightness of the display is L j and color temperature t jThe brightness L corresponding to the calibration grayscale i and color temperature t i The same, the adjustment coefficient is the calibration matrix M j .

[0036] By calibrating the picture parameters of different grayscale brightness at different current gains and the same brightness at maximum current gain, it is ensured that the picture effect at different current gains can remain consistent, and there will be no sudden changes in the picture due to changing the current gain, so as to maintain the same visual experience.

[0037] Furthermore, the display parameters also include chromaticity z, and the specific formula of the calibration matrix is:

[0038]

[0039] Among them, R, G, B are the values ​​of the red, green, and blue channels, RX D is the target value, RX D is the original value measured by the spectrocolorimeter, z is the chromaticity, Y D =L i , Y O =L j ,

[0040] Furthermore, the current gain that matches the current picture is selected, and its specific implementation method is: the current maximum brightness Lumi is calculated according to the current picture and the current display brightness, and the current gain whose maximum brightness is closest to the current maximum brightness Lumi is selected.

[0041] By selecting a parameter with a lower maximum brightness, the grayscale change rate is reduced, making the picture changes softer, increasing the picture refresh rate, and preventing users from problems such as eye fatigue due to the low picture refresh rate.

[0042] Example 2

[0043] like Figure 2 As shown, a system for improving the low-brightness refresh rate of a display screen comprises:

[0044] The parameter detection module is used to set the brightness of the display screen to the maximum brightness, record the current gain of the display screen as the maximum current gain, keep the current gain of the display screen at the maximum current gain, change the grayscale of the display screen from the maximum grayscale, and use the spectrophotometer to detect the display parameters of all grayscales of the display screen. Each grayscale corresponds to a set of display parameters. The display parameter set of all grayscales at this time is recorded as T0;

[0045] The matrix calculation module is used to gradually reduce the current gain of the display screen from the maximum current gain. Each time the current gain of the display screen is reduced, a calibration matrix is ​​calculated according to the display parameter set T0. Each level of display screen current gain j corresponds to a calibration matrix M. j , until the current gain drops to 0, stop calculating the calibration matrix;

[0046] The picture adjustment module is used to select the current gain that matches the current picture according to the current picture of the display screen, and the calibration matrix M corresponding to the current gain j Make adjustments to the display.

[0047] The embodiment disclosed in this specification is only an example of a unilateral feature of the present invention, and the protection scope of the present invention is not limited to this embodiment, and any other functionally equivalent embodiments fall within the protection scope of the present invention. For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A method for improving the low-brightness refresh rate of a display screen, characterized in that: The following steps are involved: S1. Set the brightness of the display screen to the maximum brightness, record the current gain of the display screen as the maximum current gain, keep the current gain of the display screen at the maximum current gain, change the grayscale of the display screen from the maximum grayscale, use a spectrophotometer to detect the display parameters of all grayscales of the display screen, each grayscale corresponds to a set of display parameters, record the display parameter set of all grayscales at this time as T0; S2. Starting from the maximum current gain, the current gain of the display screen is gradually reduced. Each time the current gain of the display screen is reduced, a calibration matrix is ​​calculated according to the display parameter set T0. Each level of display screen current gain j corresponds to a calibration matrix M. j , until the current gain drops to 0, stop calculating the calibration matrix; S3. According to the current screen of the display, select the display current gain that matches the current screen, and according to the calibration matrix M corresponding to the current gain j Make adjustments to the display.

2. A method for improving the low-brightness refresh rate of a display screen according to claim 1, characterized in that: The display parameters include brightness and color temperature.

3. A method for improving the low-brightness refresh rate of a display screen according to claim 1, characterized in that: In step S1, the display parameters of all grayscales of the display screen are detected by using a spectrocolorimeter, the grayscale i ranges from 1 to 65535, and for each grayscale i, the brightness L of the display screen is measured by using a spectrocolorimeter. i , and color temperature t i (x i ,y i ).

4. The method for improving the low-brightness refresh rate of a display screen according to claim 1, characterized in that: In step S2, the current gain of the display screen is gradually reduced starting from the maximum current gain, and the specific implementation method is: the current gain of the display screen is proportionally reduced from the maximum current gain.

5. A method for improving the low-brightness refresh rate of a display screen according to claim 4, characterized in that: The ratio is 10%.

6. A method for improving the low-brightness refresh rate of a display screen according to claim 1, characterized in that: In step S2, the calibration matrix is ​​calculated once according to the display parameter set T0, and the specific implementation method is as follows: after each reduction of the display current gain, the maximum gray scale is multiplied by the ratio of the current gain at this time to the maximum current gain of the display to obtain the calibration gray scale, and the maximum brightness L of the display at this time is detected by the spectrophotometer. j , and color temperature t j (x j ,y j ) until the maximum brightness of the display is L j and color temperature t j The brightness L corresponding to the calibration grayscale i and color temperature t i The same, the adjustment coefficient is the calibration matrix M j .

7. A method for improving the low-brightness refresh rate of a display screen according to claim 6, characterized in that: The display parameters also include chromaticity z, and the specific formula of the calibration matrix is: Among them, R, G, B are the values ​​of the red, green, and blue channels, RX D is the target value, RX D is the original value measured by the spectrocolorimeter, z is the chromaticity, Y D =L i , Y O =L j , 8. The method for improving the low-brightness refresh rate of a display screen according to claim 1, characterized in that: The current gain that matches the current picture is selected, and its specific implementation method is: calculate the current maximum brightness Lumi according to the current picture and the current display brightness, and select the current gain whose maximum brightness is closest to the current maximum brightness Lumi.

9. A system for improving the refresh rate of a display screen at low brightness, characterized in that: include: The parameter detection module is used to set the brightness of the display screen to the maximum brightness, record the current gain of the display screen as the maximum current gain, keep the current gain of the display screen at the maximum current gain, change the grayscale of the display screen from the maximum grayscale, and use the spectrophotometer to detect the display parameters of all grayscales of the display screen. Each grayscale corresponds to a set of display parameters. The display parameter set of all grayscales at this time is recorded as T0; The matrix calculation module is used to gradually reduce the current gain of the display screen from the maximum current gain. Each time the current gain of the display screen is reduced, a calibration matrix is ​​calculated according to the display parameter set T0. Each level of display screen current gain j corresponds to a calibration matrix M. j , until the current gain drops to 0, stop calculating the calibration matrix; The picture adjustment module is used to select the current gain that matches the current picture according to the current picture of the display screen, and the calibration matrix M corresponding to the current gain j Make adjustments to the display.

Images