CN116013211A - Dimming method and device for double liquid crystal layers, electronic equipment and storage medium - Google Patents
Dimming method and device for double liquid crystal layers, electronic equipment and storage medium Download PDFInfo
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- CN116013211A CN116013211A CN202211697296.8A CN202211697296A CN116013211A CN 116013211 A CN116013211 A CN 116013211A CN 202211697296 A CN202211697296 A CN 202211697296A CN 116013211 A CN116013211 A CN 116013211A
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Abstract
The invention provides a dimming method and device for double liquid crystal layers, electronic equipment and storage medium, wherein the dimming method comprises the following steps: assigning parameters in a standard gamma adjustment curve of the second liquid crystal layer; 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-light transmittance V-T curve of the second liquid crystal layer; judging whether the voltage-light transmittance V-T curve is attached to the assigned standard gamma adjustment curve or not; if yes, determining the gamma voltage; if not, reassigning. The invention can adjust the assignment of the parameters of the standard gamma adjustment curve of the second liquid crystal layer, obtain a proper gamma voltage group to debug the second liquid crystal layer, can increase the brightness of the picture, improve the contrast of the picture and has better display effect.
Description
Technical Field
The present invention relates to the field of display, and in particular, to a dimming method and device for a dual liquid crystal layer, an electronic device, and a storage medium.
Background
In the dual-liquid crystal display device, the display screen is the superposition of the screen formed by the first liquid crystal layer and the screen formed by the second liquid crystal layer, and compared with the single-liquid crystal display device, the display effect is better.
However, when both the first liquid crystal layer and the second liquid crystal layer of the dual liquid crystal layer display device perform the standard gamma curve y=x 2.2 A first liquid crystal layer and a second liquidThe light transmittance of the crystal layers corresponds to the gray level, for example, in the case of the gray level 131, the light transmittance of the first liquid crystal layer is 23%, and the light transmittance of the second liquid crystal layer is 23%, so that the light transmittance of the second liquid crystal layer reduces the brightness of the back light source when the first liquid crystal layer forms a picture, and compared with a display device with a single liquid crystal layer, the whole picture is dark, and the display effect is poor.
Disclosure of Invention
In view of the foregoing, it is an object of the present invention to provide a dimming method, apparatus, electronic device, and storage medium for a dual liquid crystal layer.
The embodiment of the invention provides a dimming method of a double liquid crystal layer, wherein the double liquid crystal layer comprises a first liquid crystal layer and a second liquid crystal layer positioned on the light incident side of the first liquid crystal layer, and the dimming method of the double liquid crystal layer assigns parameters in a standard gamma adjustment curve of the second liquid crystal layer; acquiring 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-light transmittance V-T curve of the second liquid crystal layer; judging whether the voltage-light transmittance V-T curve is attached to the assigned standard gamma adjustment curve or not; if yes, determining the gamma voltage; if not, reassigning.
Specifically, the dimming method further includes: judging whether the contrast of the picture is larger than a preset contrast; if yes, determining the gamma voltage; if not, reassigning.
Specifically, the dimming method further includes: judging whether the picture quality of the picture is normal or not; if yes, determining the gamma voltage; if not, reassigning.
Specifically, the standard gamma adjustment curve is: y=1- (1-x) c The method comprises the steps of carrying out a first treatment on the surface of the c is a parameter.
Specifically, the obtaining the gamma voltage group according to the assigned standard gamma adjustment curve includes: determining each gray scale and the corresponding light transmittance according to the assigned standard gamma adjustment curve; and determining gamma voltages corresponding to the gray scales according to the gray scales and the corresponding light transmittance to obtain the gamma voltage group.
Specifically, the determining each gray scale and the corresponding light transmittance according to the assigned standard gamma adjustment curve includes: and determining a plurality of ordinate values, wherein the abscissa values are the ratio of the sum of the gray scales plus 1 to the total gray scale, and the ordinate values correspond to the light transmittance of each gray scale.
Specifically, the obtaining the gamma voltage group according to the assigned standard gamma adjustment curve includes: and drawing a gamma adjustment curve according to the assigned standard gamma adjustment curve.
The embodiment of the invention also provides a dimming device with double liquid crystal layers, which comprises: the assignment module is used for assigning parameters in the standard gamma adjustment curve of the second liquid crystal layer; the gamma voltage acquisition module is used for acquiring a gamma voltage group according to the assigned standard gamma adjustment curve; the debugging detection module is used for debugging the second liquid crystal layer according to the gamma voltage group to obtain a voltage-light transmittance V-T curve of the second liquid crystal layer; the judging module is used for judging whether the voltage-light transmittance V-T curve is attached to the assigned standard gamma adjustment curve or not, if so, determining the version of gamma voltage; if not, the assignment module reassigns the value.
The embodiment of the invention also provides electronic equipment, which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the dimming method when executing the computer program.
The embodiment of the invention also provides a storage medium, wherein the storage medium stores a computer program, and the computer program realizes the steps of the dimming method when being executed by a processor.
According to the dimming method, device, electronic equipment and storage medium for the double liquid crystal layers, the parameters in the standard gamma adjustment curve of the second liquid crystal layer are assigned; 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-light transmittance V-T curve of the second liquid crystal layer; judging whether the voltage-light transmittance V-T curve is attached to the assigned standard gamma adjustment curve or not; if yes, determining the gamma voltage; if not, reassigning. Therefore, the assignment of the parameters of the standard gamma adjustment curve of the second liquid crystal layer can be adjusted, the second liquid crystal layer can be debugged by a proper gamma voltage group, the brightness of a picture can be increased, the contrast of the picture is improved, and the display effect is better.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
Drawings
Fig. 1 is a flowchart of a dimming method according to an embodiment of the present invention.
FIG. 2 is a graph of gamma adjustment curves for parameters of a standard gamma adjustment curve under a plurality of different assignments according to an embodiment of the present invention.
FIG. 3 is a graph showing the gamma adjustment curve and the voltage-transmittance V-T curve when the second liquid crystal layer is adjusted according to an embodiment of the present invention.
Fig. 4a, 4b, and 4c are schematic diagrams of a frame formed by the second liquid crystal layer after dimming, a frame formed by the first liquid crystal layer, and a frame formed by bonding the first liquid crystal layer and the second liquid crystal layer according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative of the application and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
Fig. 1 is a flowchart of a dimming method according to an embodiment of the present invention. The embodiment of the invention provides a dimming method suitable for a double liquid crystal layer, wherein the double liquid crystal layer comprises a first liquid crystal layer and a second liquid crystal layer positioned on the light incident side of the first liquid crystal layer, as shown in fig. 1, the dimming method comprises the following steps:
s110, assigning parameters in a standard gamma adjustment curve of the second liquid crystal layer.
The present embodiment is illustrated with an 8bit 256-level image, and the standard gamma adjustment curve of the second liquid crystal layer should satisfy the following 3 conditions:
1. when the first liquid crystal layer is in 0 gray scale, the display brightness of the second liquid crystal layer is required to be 0 so as to improve the contrast ratio;
2. when the first liquid crystal layer is in 1-254 gray scale, the display brightness of the second liquid crystal layer is required to be as high as possible at the high level, so that the true color of the picture of the first liquid crystal layer is restored as much as possible, and 0 level can be accepted at the low level, so that the picture is smoothly transited;
3. the first liquid crystal layer needs to display the second liquid crystal layer as the maximum brightness when the first liquid crystal layer has 255 gray scales so as to meet the maximum brightness requirement of the display module.
In an embodiment of the present invention, the standard gamma adjustment curve of the second liquid crystal layer may be determined according to 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 The curve f (x ', y') can be obtained by rotating around the point (a, b), then y+y '=2b, x+x' =2a is substituted into y=x 2.2 2b-y '= (2 a-x') 2 . 2 Substituting points (0.5 ), i.e., a=0.5, b=0.5, into the reduction yields y '=1- (1-x') 2 . 2 The shape of the standard gamma adjustment curve of the second liquid crystal layer is obtained.
Meanwhile, as the design architecture and the display effect of the display module are different, the protrusion degree required by the standard gamma adjustment curve of the second liquid crystal layer is different, and the standard gamma adjustment curve of the second liquid crystal layer is: y=1- (1-x) c The method comprises the steps of carrying out a first treatment on the surface of the c is a parameter. Wherein y is 0 or more and 1 or less, and x is 0 or more and 1 or less.
FIG. 2 is a graph of gamma adjustment curves for parameters of a standard gamma adjustment curve under a plurality of different assignments according to an embodiment of the present invention. As shown in fig. 2, the standard gamma adjustment curve y=1- (1-x) of the second liquid crystal layer c After different assignment, if c is assigned to 4 values, such as 6, 5, 3 and 2.2, respectively, the gamma adjustment curves with 4 different degrees of protrusion can be obtained, wherein A1 represents y=1- (1-x) corresponding to c after assignment of 6 6 A2 represents the corresponding y=1- (1-x) after c has been assigned a value of 5 5 A3 represents the corresponding y=1- (1-x) after c is assigned 3 3 A4 represents the corresponding y=1- (1-x) after a c value of 2.2 is assigned 2 . 2 Gamma adjustment curves of (c).
Specifically, the parameters in the standard gamma adjustment curve of the second liquid crystal layer are assigned, and the assigned standard gamma adjustment curve can be obtained. For example, the standard gamma adjustment curve of the second liquid crystal layer may be y=1- (1-x) c The method comprises the steps of carrying out a first treatment on the surface of the c is a parameter, the parameter c can be assigned to q, and the assigned standard gamma adjustment curve y=1- (1-x) q 。
S120, obtaining a gamma voltage group according to the assigned standard gamma adjustment curve.
In an embodiment of the present invention, obtaining a gamma voltage group according to the assigned standard gamma adjustment curve includes: determining each gray scale and the corresponding light transmittance according to the assigned standard gamma adjustment curve; and determining gamma voltages corresponding to the gray scales according to the gray scales and the corresponding light transmittance to obtain a gamma voltage group.
Specifically, the assigned standard gamma adjustment curve is, for example, y=1- (1-x) q The x can be corresponding to the gray scale, the x value can be a gray scale normalization value, the y can be corresponding to the light transmittance or brightness, and the x can be used for determining the relation between each gray scale and the corresponding light transmittance, namely, the light transmittance value can be determined according to the gray scale value. In one embodiment, the x-axis is the ratio of the sum of the gray scales plus 1 to the total gray scale, such as 1/256, 2/256, 3/256 … …/256, 255/256, 256/256, and a plurality of y-axis values are determined, and the y-axis values are the light transmittance of each gray scale, i.e. corresponding to 256 sets (x, y), but the embodiment is not limited thereto, such as corresponding to 64 sets (x, y) if a 6bit 64-level image is displayed. Then, according to each gray level and the corresponding light transmittance, and according to the relation between the light transmittance and the gamma voltage, the gamma voltage corresponding to each gray level can be determined, and a gamma voltage group is obtained.
In an embodiment of the present invention, obtaining a gamma voltage group according to the assigned standard gamma adjustment curve includes: and S111, drawing a gamma adjustment curve according to the assigned standard gamma adjustment curve. Specifically, the gamma adjustment curve is adjusted according to the assigned standard gamma, e.g., y=1- (1-x) q And drawing a corresponding gamma adjustment curve, and directly determining the y value of the ordinate corresponding to the point according to the point corresponding to the x value of the abscissa on the gamma adjustment curve, wherein the y value of the ordinate corresponding to the point can be used for determining gamma voltages corresponding to all gray scales to generate a gamma voltage group, and can also be used for judging whether the gamma adjustment curve is attached to a voltage-light transmittance V-T curve during debugging of a second liquid crystal layer.
S130, debugging the second liquid crystal layer according to the gamma voltage group to obtain a voltage-light transmittance V-T curve of the second liquid crystal layer.
Specifically, the second liquid crystal layer is debugged according to the gamma voltage group, so that the second liquid crystal layer carries out gamma voltage adjustment according to each gray level to change the light transmittance corresponding to each gray level, and then the actual light transmittance of the second liquid crystal layer at each gray level can be obtained by detecting the voltage-light transmittance V-T curve of the second liquid crystal layer.
S140, judging whether the voltage-light transmittance V-T curve is attached to the assigned standard gamma adjustment curve, if so, determining the version gamma voltage; if not, reassigning.
In an embodiment of the present invention, determining whether the voltage-transmittance V-T curve is attached to the assigned standard gamma adjustment curve includes: and carrying out gray scale normalization processing on the abscissa of the voltage-light transmittance V-T curve. Therefore, the difference between the actual light transmittance and the expected light transmittance can be more easily determined when the two curves are in the same gray level, and the difference can be used for judging whether the curves are attached.
Specifically, if the actually measured voltage-light transmittance V-T curve is not attached to the assigned standard gamma adjustment curve, the actual light transmittance and the expected light transmittance may be different, which may cause abnormal brightness when displaying a certain gray scale, so that the parameter assignment of the standard gamma adjustment curve needs to be repeated. If the actually measured voltage-light transmittance V-T curve is attached to the assigned standard gamma adjustment curve, the gamma voltage is set, the actual light transmittance is consistent with the expected light transmittance, the brightness change is normal when each gray level is displayed, the brightness of a picture is increased, the contrast of the picture is improved, and the display effect is better.
In an embodiment of the present invention, the dimming method further includes: judging whether the contrast of the picture is larger than a preset contrast; if yes, determining the gamma voltage; if not, reassigning. Namely, by comparing the contrast of the picture with the preset contrast, the second liquid crystal layer can obtain better picture contrast after dimming according to the assigned standard gamma adjustment curve. The present embodiment is not limited to the method of measuring the contrast of the screen, and may be implemented by a conventional technique such as a photometer or an image processing method.
In an embodiment of the present invention, the dimming method further includes: judging whether the picture quality of the picture is normal or not; if yes, determining the gamma voltage; if not, reassigning. The abnormal image quality of the picture includes over-dark picture, over-bright picture, image distortion, etc. And through judging the picture quality, the second liquid crystal layer can obtain a picture with normal picture quality after dimming according to the assigned standard gamma adjustment curve. The present embodiment is not limited to the method of determining the image quality, and may be implemented by conventional means such as eyes and an image processing method.
In an embodiment of the present invention, the dimming method further includes: and if the judgment is that the reassignment is not needed, setting the gamma voltage group generated under the current assignment of the parameters as the fixed-version gamma voltage. Therefore, the second liquid crystal layer is debugged according to the fixed version gamma voltage, the brightness of the picture can be increased, the contrast of the picture is improved, and the display effect is better.
FIG. 3 is a graph showing the gamma adjustment curve and the voltage-transmittance V-T curve when the second liquid crystal layer is adjusted according to an embodiment of the present invention. As shown in fig. 3, in an embodiment, the voltage-light transmittance V-T curve (refer to B2 in fig. 3) is very fit to the assigned standard gamma adjustment curve (refer to B1 in fig. 3), and then it is determined that the voltage-light transmittance V-T curve is fit to the assigned standard gamma adjustment curve, and then re-assignment is not required. As shown in fig. 3, in one embodiment, the standard gamma adjustment curve is: y=1- (1-x) c The method comprises the steps of carrying out a first treatment on the surface of the c is a parameter; when the parameter c is assigned to 5, B2 in fig. 3 corresponds to the actually measured voltage-transmittance V-T curve, and B1 in fig. 3 corresponds to y=1- (1-x) when c is assigned to 5 5 In the gamma curve of (a), the transmittance measured at point C1 is 0, the transmittance measured at point C2 is 74, the transmittance measured at point C3 is 130, the transmittance measured at point C3 is 95, the transmittance measured at point C4 is 255 is 100, and y=1- (1-x) in the voltage-transmittance V-T curve B2 5 In the gamma curve of (a) B1, the transmittance of 0 at the point D1, 74 at the point D2, 97 at the point D3, and 100 at the point D4, respectively, for the gray scale of 0, 60, 97 at the point D3, and 255, it can be seen that the actually measured voltage-transmittance V-T curve is very closely attached to the assigned standard gamma adjustment curve, i.e., y=1- (1-x) 5 And the display effect is good, and the gamma voltage group generated when the parameter c is currently assigned to 5 can be set as the fixed-version gamma voltage without reassigning.
Fig. 4a, 4b, and 4c are schematic diagrams of a frame formed by the second liquid crystal layer after dimming, a frame formed by the first liquid crystal layer, and a frame formed by bonding the first liquid crystal layer and the second liquid crystal layer according to an embodiment of the present invention. Referring to fig. 4a, fig. 4b and fig. 4c, after dimming by the dimming method of the present embodiment, the light transmittance of the second liquid crystal layer is relatively increased, the brightness of the back light source is increased when the first liquid crystal layer forms a picture, the whole picture displayed after dimming is no longer dark, the picture contrast is higher, and the display effect is better.
Based on the same inventive concept, the embodiments of the present invention also provide a dimming device with dual liquid crystal layers, and for brevity description, reference may be made to the corresponding contents in the above embodiments where the portion of the embodiment is not mentioned.
The dimming device provided by the embodiment comprises an assignment module, a gamma voltage acquisition module, a debugging detection module and a judgment module. The assignment module is used for assigning parameters in the standard gamma adjustment curve of the second liquid crystal layer. The gamma voltage acquisition module is used for acquiring a gamma voltage group according to the assigned standard gamma adjustment curve. The debugging detection module is used for debugging the second liquid crystal layer according to the gamma voltage group to obtain a voltage-light transmittance V-T curve of the second liquid crystal layer. The judging module is used for judging whether the voltage-light transmittance V-T curve is attached to the assigned standard gamma adjustment curve or not; if yes, determining the gamma voltage; if not, the assignment module reassigns the value.
The embodiment of the invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the dimming method of the embodiment. The implementation of the electronic device may refer to the embodiment of the dimming method with two liquid crystal layers, and the repetition is not repeated.
The embodiment of the invention also provides a storage medium, and the storage medium stores a computer program which executes the steps of the dimming method of the embodiment when being executed by a processor. The implementation of the storage medium can refer to the embodiment of the dimming method of the dual liquid crystal layer, and the repetition is omitted.
The dimming method, the dimming device, the electronic equipment and the storage medium for the second liquid crystal layer suitable for the double liquid crystal layers are used for assigning parameters in a standard gamma adjustment curve of the second liquid crystal layer; 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-light transmittance V-T curve of the second liquid crystal layer; judging whether the voltage-light transmittance V-T curve is attached to the assigned standard gamma adjustment curve or not; if yes, determining the gamma voltage; if not, reassigning. Therefore, the assignment of the parameters of the standard gamma adjustment curve of the second liquid crystal layer can be adjusted, the second liquid crystal layer can be debugged by a proper gamma voltage group, the brightness of a picture can be increased, the contrast of the picture is improved, and the display effect is better.
The present invention is not limited to the preferred embodiments, but is capable of modification and variation in detail, and is intended to cover modifications, equivalents and variations of the above embodiments in accordance with the principles of the present invention, without departing from the scope of the invention.
Claims (10)
1. A dimming method of a dual liquid crystal layer, the dual liquid crystal layer including a first liquid crystal layer and a second liquid crystal layer located at an incident side of the first liquid crystal layer, the dimming method of the dual liquid crystal layer comprising:
assigning parameters in a standard gamma adjustment curve of the second liquid crystal layer;
acquiring 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-light transmittance V-T curve of the second liquid crystal layer;
judging whether the voltage-light transmittance V-T curve is attached to the assigned standard gamma adjustment curve or not; if yes, determining the gamma voltage; if not, reassigning.
2. The method of dimming a dual liquid crystal layer according to claim 1, further comprising:
judging whether the contrast of the picture is larger than a preset contrast; if yes, determining the gamma voltage; if not, reassigning.
3. The method of dimming a dual liquid crystal layer according to claim 1, further comprising:
judging whether the picture quality of the picture is normal or not; if yes, determining the gamma voltage; if not, reassigning.
4. The method of claim 1, wherein the standard gamma adjustment curve is: y=1- (1-x) c The method comprises the steps of carrying out a first treatment on the surface of the c is a parameter.
5. The method of claim 1, wherein the obtaining the gamma voltage group according to the assigned standard gamma adjustment curve comprises:
determining each gray scale and the corresponding light transmittance according to the assigned standard gamma adjustment curve;
and determining gamma voltages corresponding to the gray scales according to the gray scales and the corresponding light transmittance to obtain the gamma voltage group.
6. The method for dimming a dual liquid crystal layer according to claim 5, wherein determining each gray level and the corresponding transmittance according to the assigned standard gamma adjustment curve comprises:
and determining a plurality of ordinate values, wherein the abscissa values are the ratio of the sum of the gray scales plus 1 to the total gray scale, and the ordinate values correspond to the light transmittance of each gray scale.
7. The method of claim 1, wherein the obtaining the gamma voltage group according to the assigned standard gamma adjustment curve comprises:
and drawing a gamma adjustment curve according to the assigned standard gamma adjustment curve.
8. A dual liquid crystal layer dimming device, comprising:
the assignment module is used for assigning parameters in the standard gamma adjustment curve of the second liquid crystal layer;
the gamma voltage acquisition module is used for acquiring a gamma voltage group according to the assigned standard gamma adjustment curve;
the debugging detection module is used for debugging the second liquid crystal layer according to the gamma voltage group to obtain a voltage-light transmittance V-T curve of the second liquid crystal layer;
the judging module is used for judging whether the voltage-light transmittance V-T curve is attached to the assigned standard gamma adjustment curve or not; if yes, determining the gamma voltage; if not, the assignment module reassigns the value.
9. An electronic device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the dimming method of any of claims 1 to 7 when the computer program is executed.
10. A storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the dimming method of any one of claims 1 to 7.
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