Dual liquid crystal layer dimming method, device, electronic device and storage medium

Abstract

The present invention provides a dual-liquid crystal layer dimming method, device, electronic device, and storage medium. The dimming method includes: assigning values ​​to parameters in a standard gamma adjustment curve for a second liquid crystal layer; obtaining a gamma voltage set based on the assigned standard gamma adjustment curve; adjusting the second liquid crystal layer based on the gamma voltage set to obtain a voltage-transmittance (V-T) curve for the second liquid crystal layer; determining whether the voltage-transmittance (V-T) curve matches the assigned standard gamma adjustment curve; if so, fixing the gamma voltage; if not, reassigning values. The present invention can adjust the assigned values ​​of the parameters in the standard gamma adjustment curve for the second liquid crystal layer to obtain a suitable gamma voltage set for adjusting the second liquid crystal layer, thereby increasing image brightness, improving image contrast, and achieving a better display effect.

Description

Technical Field

[0001] The present invention relates to the field of display, and in particular to a dual-liquid crystal layer dimming method, device, electronic equipment and storage medium. Background Art

[0002] In a dual-liquid crystal layer display device, the display image is a superposition of an image formed by the first liquid crystal layer and an image formed by the second liquid crystal layer, and has a better display effect than a single-liquid crystal layer display device.

[0003] However, when the first and second liquid crystal layers of the dual-liquid crystal display device are both subjected to the standard gamma curve y=x 2.2 When the voltage is adjusted, the transmittance of the first liquid crystal layer and the second liquid crystal layer corresponds to the grayscale. For example, at grayscale 131, the transmittance of the first liquid crystal layer is 23%, and the transmittance of the second liquid crystal layer is 23%. As a result, the transmittance of the second liquid crystal layer reduces the brightness of the backlight source when the first liquid crystal layer forms a picture. Compared with a display device with a single liquid crystal layer, the overall picture is darker and the display effect is poor. Summary of the Invention

[0004] In view of the above problems, an object of the present invention is to provide a dual liquid crystal layer dimming method, device, electronic device and storage medium.

[0005] An embodiment of the present invention provides a dimming method for a dual liquid crystal layer, wherein the dual liquid crystal layer includes a first liquid crystal layer and a second liquid crystal layer located on the light incident side of the first liquid crystal layer. The dimming method for the dual liquid crystal layer assigns values ​​to parameters in a standard gamma adjustment curve of the second liquid crystal layer; obtains a gamma voltage group based on the assigned standard gamma adjustment curve; debugs the second liquid crystal layer based on the gamma voltage group to obtain a voltage-transmittance V-T curve of the second liquid crystal layer; determines whether the voltage-transmittance V-T curve is consistent with the assigned standard gamma adjustment curve; if so, fixes the gamma voltage; if not, reassigns the value.

[0006] Specifically, the dimming method further includes: determining whether the contrast of the picture is greater than a preset contrast; if so, fixing the gamma voltage; if not, re-assigning the value.

[0007] Specifically, the dimming method further includes: determining whether the image quality is normal; if so, fixing the gamma voltage; if not, re-assigning the value.

[0008] Specifically, the standard gamma adjustment curve is: y=1-(1-x) c ;c is the parameter.

[0009] Specifically, obtaining the gamma voltage group according to the assigned standard gamma adjustment curve includes: determining each grayscale and the corresponding transmittance according to the assigned standard gamma adjustment curve; determining the gamma voltage corresponding to each grayscale according to the grayscale and the corresponding transmittance, and obtaining the gamma voltage group.

[0010] Specifically, the grayscale and the corresponding transmittance are determined based on the assigned standard gamma adjustment curve, including: the horizontal axis value is the ratio of the sum of each grayscale plus 1 to the total number of grayscales, and multiple vertical axis values ​​are determined, and the multiple vertical axis values ​​correspond to the transmittance of each grayscale.

[0011] Specifically, obtaining a gamma voltage group according to the assigned standard gamma adjustment curve includes: drawing a gamma adjustment curve according to the assigned standard gamma adjustment curve.

[0012] An embodiment of the present invention also provides a dual-liquid crystal layer dimming device, including: an assignment module for assigning parameters in the standard gamma adjustment curve of the second liquid crystal layer; a gamma voltage acquisition module for obtaining a gamma voltage group based on the assigned standard gamma adjustment curve; a debugging and detection module for debugging the second liquid crystal layer according to the gamma voltage group to obtain a voltage-transmittance V-T curve of the second liquid crystal layer; a judgment module for judging whether the voltage-transmittance V-T curve is consistent with the assigned standard gamma adjustment curve, and if so, fixing the gamma voltage; if not, the assignment module reassigns.

[0013] An embodiment of the present invention further provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the dimming method described above when executing the computer program.

[0014] An embodiment of the present invention further provides a storage medium storing a computer program, which implements the steps of the above-mentioned dimming method when executed by a processor.

[0015] The dual-liquid crystal layer dimming method, device, electronic device, and storage medium provided by the present invention assign values ​​to the parameters of the standard gamma adjustment curve of the second liquid crystal layer; obtain a gamma voltage set based on the assigned standard gamma adjustment curve; adjust the second liquid crystal layer based on the gamma voltage set to obtain a voltage-transmittance V-T curve for the second liquid crystal layer; determine whether the voltage-transmittance V-T curve matches the assigned standard gamma adjustment curve; if so, set the gamma voltage; if not, re-assign values. Thus, the assigned values ​​of the parameters of the standard gamma adjustment curve of the second liquid crystal layer can be adjusted to obtain a suitable gamma voltage set for adjusting the second liquid crystal layer, thereby increasing image brightness, improving image contrast, and achieving better display effects.

[0016] In order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 4 is a flow chart of a dimming method according to an embodiment of the present invention.

[0018] Figure 2 1 is a gamma adjustment curve diagram of parameters of a standard gamma adjustment curve under multiple different assigned values ​​according to an embodiment of the present invention.

[0019] Figure 3 This is a graph showing the gamma adjustment curve and the voltage-transmittance V-T curve when adjusting the second liquid crystal layer according to an embodiment of the present invention.

[0020] Figure 4a 、 4b 4c are schematic diagrams of a screen formed by the second liquid crystal layer after dimming, a screen formed by the first liquid crystal layer, and a screen formed after the first liquid crystal layer and the second liquid crystal layer are bonded together according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0022] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0023] Figure 1This is a flow chart of a dimming method according to an embodiment of the present invention. The embodiment of the present invention provides a dimming method applicable to a double liquid crystal layer, wherein the double liquid crystal layer includes a first liquid crystal layer and a second liquid crystal layer located on the light incident side of the first liquid crystal layer, such as Figure 1 As shown, the dimming method includes:

[0024] S110 , assigning values ​​to parameters in a standard gamma adjustment curve of the second liquid crystal layer.

[0025] This embodiment uses an 8-bit 256-level image as an example to illustrate that the standard gamma adjustment curve of the second liquid crystal layer should meet the following three conditions:

[0026] 1. When the first liquid crystal layer is at grayscale 0, the display brightness of the second liquid crystal layer needs to be 0 to improve the contrast;

[0027] 2. When the first liquid crystal layer is in grayscale 1-254, the second liquid crystal layer needs to display as high brightness as possible at high grayscale to restore the true color of the first liquid crystal layer as much as possible, and can take over the 0th grayscale at low grayscale to ensure smooth transition;

[0028] 3. When the first liquid crystal layer is at grayscale 255, the second liquid crystal layer needs to display at maximum brightness to achieve the maximum brightness requirement of the display module.

[0029] In one embodiment of the invention, the standard gamma adjustment curve of the second liquid crystal layer can be determined based on the gamma curve of the first liquid crystal layer. For example, the gamma curve of the first liquid crystal layer is y=x 2.2 , we can rotate around point (a, b) to get the curve f(x', y'), then substitute y+y'=2b, x+x'=2a into y=x 2.2 , we can get 2b-y'=(2a-x') 2 . 2 , substitute the point (0.5, 0.5) i.e. a=0.5, b=0.5 and simplify to get y'=1-(1-x') 2 . 2 , that is, the shape of the standard gamma adjustment curve of the second liquid crystal layer is obtained.

[0030] At the same time, due to the different design structures and display effects of the display modules, the standard gamma adjustment curve of the second liquid crystal layer requires different convexity. The standard gamma adjustment curve of the second liquid crystal layer is: y = 1-(1-x) c c is a parameter. y is greater than or equal to 0 and less than or equal to 1, and x is greater than or equal to 0 and less than or equal to 1.

[0031] Figure 2 : is a gamma adjustment curve diagram of the parameters of the standard gamma adjustment curve under multiple different assignments according to an embodiment of the present invention. Figure 2 As shown, the standard gamma adjustment curve of the second liquid crystal layer is y=1-(1-x) c When the parameter c is assigned different values, such as 6, 5, 3, and 2.2, four gamma adjustment curves with different convexities can be obtained. Among them, A1 represents y=1-(1-x) corresponding to c assigned to 6. 6 Gamma adjustment curve, A2 represents y=1-(1-x) when c is assigned a value of 5 5 Gamma adjustment curve, A3 represents y=1-(1-x) when c is assigned a value of 3 3 Gamma adjustment curve, A4 represents y = 1-(1-x) after c is assigned a value of 2.2 2 . 2 gamma adjustment curve.

[0032] Specifically, the parameters in the standard gamma adjustment curve of the second liquid crystal layer are assigned to obtain the assigned standard gamma adjustment curve. For example, the standard gamma adjustment curve of the second liquid crystal layer can be y=1-(1-x) c ; c is a parameter, then the parameter c can be assigned to q first, then the standard gamma adjustment curve after assignment is y=1-(1-x) q .

[0033] S120 , obtaining a gamma voltage group according to the assigned standard gamma adjustment curve.

[0034] In one embodiment of the invention, a gamma voltage group is obtained according to the assigned standard gamma adjustment curve, including: determining each grayscale and the corresponding transmittance according to the assigned standard gamma adjustment curve; determining the gamma voltage corresponding to each grayscale according to each grayscale and the corresponding transmittance, to obtain the gamma voltage group.

[0035] Specifically, the standard gamma adjustment curve after assignment is, for example, y=1-(1-x) q , x can correspond to the grayscale, the x value can be the grayscale normalized value, y can correspond to the transmittance or brightness, and can be used to determine the relationship between each grayscale and the corresponding transmittance, that is, the transmittance value can be determined according to the grayscale value. In one embodiment, the horizontal axis x value is the ratio of the sum of each grayscale plus 1 to the total number of grayscales, such as 1 / 256, 2 / 256, 3 / 256...254 / 256, 255 / 256, 256 / 256, and multiple vertical axis y values ​​are determined. The multiple vertical axis y values ​​correspond to the transmittance of each grayscale, that is, corresponding to 256 groups (x, y), but this embodiment is not limited to this. For example, if a 6-bit 64-level image is displayed, it corresponds to 64 groups (x, y). Then, according to each grayscale and the corresponding transmittance, and according to the relationship between the transmittance and the gamma voltage, the gamma voltage corresponding to each grayscale can be determined to obtain a gamma voltage group.

[0036] In one embodiment of the invention, obtaining a gamma voltage group according to the assigned standard gamma adjustment curve includes: S111, drawing a gamma adjustment curve according to the assigned standard gamma adjustment curve. Specifically, according to the assigned standard gamma adjustment curve, for example, y=1-(1-x) q , a corresponding gamma adjustment curve is drawn. Then, the y-value of the ordinate corresponding to the point corresponding to the x-value of the abscissa on the gamma adjustment curve can be directly determined. This can be used to determine the gamma voltage corresponding to each grayscale to generate a gamma voltage group. It can also be used to graphically determine whether the gamma adjustment curve is consistent with the voltage-transmittance V-T curve during debugging of the second liquid crystal layer.

[0037] S130 , adjusting the second liquid crystal layer according to the gamma voltage group to obtain a voltage-transmittance V-T curve of the second liquid crystal layer.

[0038] Specifically, the second liquid crystal layer is debugged according to the gamma voltage group, so that the second liquid crystal layer adjusts the gamma voltage according to each grayscale, changes the transmittance corresponding to each grayscale, and then, by detecting the voltage-transmittance V-T curve of the second liquid crystal layer, the actual transmittance of the second liquid crystal layer at each grayscale can be obtained.

[0039] S140: Determine whether the voltage-transmittance V-T curve matches the assigned standard gamma adjustment curve. If so, fix the gamma voltage; if not, reassign the value.

[0040] In one embodiment of the invention, determining whether the voltage-transmittance V-T curve aligns with the assigned standard gamma adjustment curve includes grayscale normalization of the abscissa of the voltage-transmittance V-T curve. This makes it easier to determine the difference between the actual transmittance and the expected transmittance when the two curves are at the same grayscale, which can be used to determine whether the curves align.

[0041] Specifically, if the measured voltage-transmittance V-T curve does not align with the assigned standard gamma adjustment curve, there is a difference between the actual transmittance and the expected transmittance, which may cause abnormal brightness when displaying a certain grayscale, necessitating the re-assignment of the parameters of the standard gamma adjustment curve. If the measured voltage-transmittance V-T curve aligns with the assigned standard gamma adjustment curve, the gamma voltage is fixed, and the actual transmittance is consistent with the expected transmittance. The brightness changes normally when displaying each grayscale, increasing the brightness of the picture, improving the picture contrast, and improving the display effect.

[0042] In one embodiment of the invention, the dimming method further includes determining whether the image contrast is greater than a preset contrast; if so, setting the gamma voltage; if not, re-assigning the gamma voltage. Specifically, by comparing the image contrast with the preset contrast, the second liquid crystal layer is ensured to achieve a good image contrast after dimming according to the assigned standard gamma adjustment curve. It should be noted that this embodiment does not limit the method for measuring image contrast; for example, it can be achieved using existing technologies such as a photometer or image processing.

[0043] In one embodiment of the invention, the dimming method further includes: determining whether the image quality is normal; if so, fixing the gamma voltage; if not, re-assigning the value. Abnormal image quality may include images that are too dark, too bright, or distorted. By determining the image quality, the second liquid crystal layer is ensured to produce a normal image quality image after dimming according to the assigned standard gamma adjustment curve. It should be noted that this embodiment does not limit the method for determining image quality; for example, it can be achieved through existing technologies such as the human eye and image processing.

[0044] In one embodiment of the invention, the dimming method further includes: if it is determined that re-assignment is not necessary, setting the gamma voltage set generated by the currently assigned parameter values ​​as the fixed gamma voltage. Thus, adjusting the second liquid crystal layer according to the fixed gamma voltage can increase image brightness, improve image contrast, and provide a better display effect.

[0045] Figure 3 This is a graph showing the gamma adjustment curve and the voltage-transmittance V-T curve when debugging the second liquid crystal layer according to an embodiment of the present invention. Figure 3 As shown, in one embodiment, the voltage-transmittance V-T curve (reference Figure 3 B2 in the figure is very close to the standard gamma adjustment curve after assignment (reference Figure 3 If the voltage-transmittance V-T curve is consistent with the assigned standard gamma adjustment curve, then there is no need to re-assign the value. Figure 3 As shown, in one embodiment, the standard gamma adjustment curve is: y=1-(1-x) c ; c is a parameter; when the parameter c is assigned a value of 5, Figure 3 B2 in the figure corresponds to the actual measured voltage-transmittance V-T curve. Figure 3 When B1 in the figure corresponds to c being assigned a value of 5, the corresponding y=1-(1-x) 5 The gamma curve of the voltage-transmittance V-T curve obtained by the test is B2. When the grayscale of point C1 is 0, the transmittance is 0%. When the grayscale of point C2 is 60, the transmittance is 74%. When the grayscale of point C3 is 130, the transmittance is 95%. When the grayscale of point C4 is 255, the transmittance is 100%. And y=1-(1-x) 5In the gamma curve diagram B1, when the grayscale of point D1 is 0, the transmittance is 0%, when the grayscale of point D2 is 60, the transmittance is 74%, when the grayscale of point D3 is 130, the transmittance is 97%, and when the grayscale of point D4 is 255, the transmittance is 100%. It can be seen that the actual measured voltage-transmittance V-T curve is very consistent with the standard gamma adjustment curve after the assignment, that is, y=1-(1-x). 5 , and the display effect is good, there is no need to re-assign the value. The gamma voltage group generated when the current value of parameter c is 5 can be set as the fixed version gamma voltage.

[0046] Figure 4a 、 4b 4c is a schematic diagram of a screen formed by the second liquid crystal layer after dimming, a screen formed by the first liquid crystal layer, and a screen formed after the first liquid crystal layer and the second liquid crystal layer are bonded together according to an embodiment of the present invention. Figure 4a 、 Figure 4b and Figure 4c After dimming using the dimming method of this embodiment, the transmittance of the second liquid crystal layer is relatively increased, which increases the brightness of the backlight source when the first liquid crystal layer forms a picture. After dimming, the overall picture displayed is no longer dark, the picture contrast is higher, and the display effect is better.

[0047] Based on the same inventive concept, an embodiment of the present invention further provides a dual liquid crystal layer dimming device. For the sake of brief description, for matters not mentioned in this embodiment, reference may be made to the corresponding contents in the above embodiments.

[0048] The dimming device provided in this embodiment includes an assignment module, a gamma voltage acquisition module, a debugging and detection module, and a judgment module. The assignment module is used to assign values ​​to the parameters in the standard gamma adjustment curve of the second liquid crystal layer. The gamma voltage acquisition module is used to obtain a gamma voltage group based on the assigned standard gamma adjustment curve. The debugging and detection module is used to debug the second liquid crystal layer based on the gamma voltage group to obtain a voltage-transmittance (V-T) curve of the second liquid crystal layer. The judgment module is used to determine whether the voltage-transmittance (V-T) curve matches the assigned standard gamma adjustment curve; if so, the gamma voltage is set; if not, the assignment module reassigns values.

[0049] An embodiment of the present invention further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable by the processor. When the processor executes the computer program, the steps of the dimming method described in the above embodiment are implemented. The implementation of this electronic device can be found in the above embodiment of the dual liquid crystal layer dimming method, and any repetitive details are omitted.

[0050] An embodiment of the present invention further provides a storage medium storing a computer program that, when executed by a processor, performs the steps of the dimming method described above. The implementation of this storage medium can be found in the embodiment of the dual liquid crystal layer dimming method described above, and any repetitions are omitted.

[0051] The present invention provides a dimming method, device, electronic device, and storage medium for the second liquid crystal layer of a dual liquid crystal layer. The method assigns values ​​to the parameters of the standard gamma adjustment curve for the second liquid crystal layer; obtains a gamma voltage set based on the assigned standard gamma adjustment curve; adjusts the second liquid crystal layer based on the gamma voltage set to obtain a voltage-transmittance (V-T) curve for the second liquid crystal layer; determines whether the voltage-transmittance (V-T) curve matches the assigned standard gamma adjustment curve; if so, sets the gamma voltage; if not, reassigns the gamma voltage. Thus, the assigned values ​​of the parameters of the standard gamma adjustment curve for the second liquid crystal layer can be adjusted to obtain a suitable gamma voltage set for adjusting the second liquid crystal layer, thereby increasing image brightness, improving image contrast, and achieving a better display effect.

[0052] The above description is merely 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, it is not intended to limit the invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of the technical contents disclosed above without departing from the scope of the technical solution of the invention. However, any simple modifications, 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 dimming method for a dual liquid crystal layer, wherein the dual liquid crystal layer comprises a first liquid crystal layer and a second liquid crystal layer located on the light incident side of the first liquid crystal layer, characterized in that: The dimming method of the dual liquid crystal layer includes: Assign values ​​to the parameters of the standard gamma adjustment curve of the second liquid crystal layer, wherein the standard gamma adjustment curve is: y=1-(1-x) c ;c is a parameter; Obtaining a gamma voltage group according to the assigned standard gamma adjustment curve; Debugging the second liquid crystal layer according to the gamma voltage group to obtain a voltage-transmittance V-T curve of the second liquid crystal layer; Determine whether the voltage-transmittance V-T curve matches the assigned standard gamma adjustment curve; if so, fix the gamma voltage; if not, reassign the value.

2. The dual liquid crystal layer dimming method according to claim 1, wherein: Also includes: Determine whether the contrast of the image is greater than a preset contrast; if so, set the gamma voltage; If not, reassign the value.

3. The dual liquid crystal layer dimming method according to claim 1, wherein: Also includes: Determine whether the image quality is normal; if so, set the gamma voltage; If not, reassign the value.

4. The dual liquid crystal layer dimming method according to claim 1, wherein: The step of obtaining a gamma voltage group according to the assigned standard gamma adjustment curve includes: Determining each grayscale and its corresponding transmittance according to the assigned standard gamma adjustment curve; According to the grayscales and the corresponding light transmittances, the gamma voltage corresponding to each grayscale is determined to obtain the gamma voltage group.

5. The dual liquid crystal layer dimming method according to claim 4, characterized in that: Determining each grayscale and the corresponding transmittance according to the assigned standard gamma adjustment curve includes: The value of the horizontal axis is the ratio of the sum of each grayscale plus 1 to the total number of grayscales, and multiple vertical axis values ​​are determined. The multiple vertical axis values ​​correspond to the transmittance of each grayscale.

6. The dual liquid crystal layer dimming method according to claim 1, wherein: The step of obtaining a gamma voltage group according to the assigned standard gamma adjustment curve includes: A gamma adjustment curve is drawn according to the assigned standard gamma adjustment curve.

7. A dual liquid crystal layer dimming device, characterized in that: include: The assignment module is used to assign values ​​to the parameters in the standard gamma adjustment curve of the second liquid crystal layer, where the standard gamma adjustment curve is: y=1-(1-x) c ;c is a parameter; A gamma voltage acquisition module, configured to obtain a gamma voltage group according to the assigned standard gamma adjustment curve; a debugging and detecting module, configured to debug the second liquid crystal layer according to the gamma voltage group and obtain a voltage-transmittance V-T curve of the second liquid crystal layer; The judgment module is used to judge whether the voltage-transmittance V-T curve is consistent with the assigned standard gamma adjustment curve; if so, the gamma voltage is fixed; if not, the assignment module reassigns the value.

8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the dimming method according to any one of claims 1 to 6 are implemented.

9. A storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the dimming method according to any one of claims 1 to 6 are implemented.

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