CN113393804B - High-brightness display device and brightness adjusting method thereof - Google Patents
High-brightness display device and brightness adjusting method thereof Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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Abstract
The invention discloses a high-brightness display device and a brightness adjusting method thereof, wherein the high-brightness display device comprises a high-brightness adjusting unit, the high-brightness adjusting unit comprises a plurality of groups of gamma curves, 255 gray scales of the gamma curves correspond to the same brightness, and a gray scale brightness formula corresponding to the X gray scale of each group of gamma curves is that the brightness of the X gray scale is 255 gray scale brightness (X/255) Target gamma value And in the multiple groups of gamma curves, the target gamma value is smaller than the standard gamma value of the highlight display device. According to the invention, the brightness of the 0-254 gray scale is improved by changing the relative relation between the brightness of the 0-254 gray scale and the brightness of the 255 gray scale without changing the brightness of the 255 gray scale, so that the watching effect of images under sunlight is improved, the heat dissipation requirement on the highlight display device is reduced, and the service life of the highlight display device is prolonged.
Description
Technical Field
The invention relates to the technical field of display, in particular to a highlight display device and a brightness adjusting method thereof.
Background
When a mobile phone is used outdoors in daytime or a liquid crystal television is watched, screen contents are easily seen unclear, and especially, the stronger the sunlight is, the less clear the screen contents are, so that the appearance is influenced. Therefore, it is desirable to provide a highlight display device, that is, a display device capable of viewing screen contents in direct sunlight with a high brightness.
However, in the existing high brightness display device, the way of increasing the maximum brightness of the screen is realized by increasing the backlight power or increasing the number of Light emitting diodes (leds), which increases the product cost, and the higher the brightness is, the higher the temperature of the display module is, the higher the heat dissipation requirement for the display device is, especially under outdoor high-intensity sunlight, the bad heat dissipation of the module can affect the service life of the outdoor high brightness display screen.
Disclosure of Invention
The embodiment of the invention provides a highlight display device and a brightness adjusting method thereof, which aim to solve the technical problem that screen content is easy to be unclear when the existing highlight display device is used outdoors in daylight.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the invention provides a high brightness display device, which comprises a high brightness adjusting unit, wherein the high brightness adjusting unit comprises a plurality of groups of gamma curves, 255 gray scales of the gamma curves correspond to the same brightness, a gray scale brightness formula corresponding to an X gray scale of each group of the gamma curves is as follows,x gray scale brightness 255 gray scale brightness (X/255) Target gamma value And in the plurality of groups of gamma curves, the target gamma value is smaller than the standard gamma value of the highlight display device.
According to the highlight display device provided by the invention, the target gamma value is less than 2.2.
According to the highlight display device provided by the invention, the value range of the target gamma value is 0.1-1.8.
The invention provides a brightness adjusting method of a highlight display device, which comprises the following steps:
acquiring a plurality of groups of gamma curves of the highlight display device and target gamma values corresponding to X gray scales, wherein 255 gray scales of the plurality of groups of gamma curves correspond to the same brightness;
acquiring the 255 gray scale brightness according to the multiple groups of gamma curves; and
substituting the target gamma value and the 255 gray scale brightness into a gray scale brightness formula corresponding to the X gray scale to obtain X gray scale brightness; the gray scale brightness formula corresponding to the X gray scale is as follows: x gray scale brightness 255 gray scale brightness (X/255) Target gamma value And the target gamma value is smaller than the standard gamma value of the highlight display device.
According to the brightness adjusting method of the highlight display panel provided by the invention, the target gamma value corresponding to the X gray scale is obtained, and the method comprises the following steps:
acquiring a brightness gain multiple corresponding to the X gray scale; and
and obtaining the target gamma value according to the brightness gain multiple and a pre-obtained target gamma value pre-estimation strategy.
According to the brightness adjusting method of the highlight display panel provided by the invention, the target gamma value is obtained according to the brightness gain multiple and a pre-obtained target gamma value estimation strategy, and the method comprises the following steps:
acquiring a sample data set of the highlight display device, wherein the sample data set comprises a plurality of sets of sample data corresponding to the X gray scale in the gamma curve, and each sample data comprises the brightness gain multiple and the target gamma value;
simulating to obtain a target gamma value estimation model by using the sample data set; and
and determining the target gamma value prediction strategy by using the target gamma value prediction model.
According to the brightness adjusting method of the highlight display device, the target gamma value estimation formula of the highlight display device is obtained through fitting calculation according to the plurality of sample data in the sample data set.
According to the brightness adjusting method of the highlight display panel, the brightness gain multiple is substituted into the target gamma value estimation formula to obtain the target gamma value.
According to the brightness adjusting method of the highlight display panel provided by the invention, the brightness gain multiple is the ratio of the brightness of the X gray scale corresponding to the target gamma value to the brightness of the X gray scale corresponding to the standard gamma value of the highlight display device.
According to the brightness adjusting method of the highlight display panel, the value range of the target gamma value is 0.1-1.8.
The invention has the beneficial effects that: the highlight display device comprises a plurality of groups of gamma curves, 255 gray scales of the gamma curves correspond to the same brightness, the brightness of the 255 gray scale is not changed for each group of gamma curves, the brightness of the 0-254 gray scale is improved by changing the relative relation between the brightness of the 0-254 gray scale and the brightness of the 255 gray scale, the screen content can be clearly seen when the highlight display device is used in sunlight outdoors in daytime, and the watching effect of images in sunlight is improved. In addition, compared with the mode of obtaining highlight display by increasing the highest brightness of a screen in the prior art, for example, by increasing the backlight power or increasing the number of light emitting diodes, the highlight display device provided by the invention reduces the heat dissipation requirement on the highlight display device, is beneficial to prolonging the service life of the highlight display device and reduces the cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a highlight display device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of three sets of gamma curves with gamma values of 2, 2.2 and 2.4, respectively, according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a plurality of gamma curves provided by an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a brightness adjustment method for a highlighting device according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a brightness adjustment method of a highlight display device, according to an embodiment of the present invention, step S2;
FIG. 6 is a flowchart illustrating a brightness adjustment method of a highlight display device, according to an embodiment of the present invention, step S12;
FIG. 7 is a graph illustrating brightness gain multiples with different gamma values according to an embodiment of the present invention;
FIG. 8 is a diagram illustrating a relationship between a brightness gain multiple corresponding to a 50 gray level and a target gamma value according to an embodiment of the present invention;
FIG. 9 is a diagram illustrating a relationship between a target gamma value corresponding to 50 gray levels and a brightness gain multiple according to an embodiment of the present invention.
Description of reference numerals:
100. a highlight display device; 101. and a highlight adjusting unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Furthermore, it should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, and are not intended to limit the present invention. In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means upper and lower in the actual use or operation of the device, particularly in the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a highlight display device according to an embodiment of the present invention. The invention provides a highlight display device 100, wherein the highlight display device 100 comprises a highlight adjusting unit 101 which is used for adjusting the brightness of the highlight display device 100. The highlight adjusting unit 101 comprises a plurality of sets of gamma curves, wherein 255 gray scales of the plurality of sets of gamma curves correspond to the same brightness, and the gray scale brightness formula corresponding to the X gray scale of each set of gamma curve is that X gray scale brightness is 255 gray scale brightness (X/255) Target gamma value In the plurality of sets of gamma curves, the target gamma value is smaller than the standard gamma value of the highlight display device 100.
Specifically, the X gray level refers to any one of the gray levels 0 to 254, and the X gray level brightness refers to the brightness corresponding to any one of the gray levels 0 to 254 in each set of gamma curves.
It can be understood that the screen display image is formed by combining the 0-255 gray scales, including the 0-254 gray scale and the 255 gray scale. Since the 255 gray scale is only one gray scale, in most display scenes such as images and videos, the 255 gray scale images and videos are rarely displayed separately, and although the viewing effect of the images in sunlight can be improved by only improving the brightness of the 255 gray scale, the high brightness can cause the temperature of the highlight display device 100 to be higher. The invention improves the watching effect of the image under sunlight by improving 0-254 gray scale brightness, specifically, the 0-254 gray scale brightness is improved by changing the relative relation between the 0-254 gray scale brightness and the 255 gray scale brightness without changing the 255 gray scale brightness, and on the basis of improving the watching effect of the image under sunlight, compared with the mode of obtaining highlight display by increasing the highest brightness of a screen in the prior art, for example, by increasing backlight power or increasing the number of light emitting diodes, the highlight display device 100 provided by the invention reduces the heat dissipation requirement on the highlight display device 100, is particularly suitable for being used in outdoor environment, is beneficial to prolonging the service life of the highlight display device and reduces the cost.
It should be noted that the standard gamma value of the conventional display device is usually set within a range of 2.2 ± 0.3, i.e., the value of the gamma value of the conventional display device is 1.9-2.5. In general, in order to balance true color and brightness, the standard gamma value of the existing display device is usually set to 2.2 by default, which has been set as the standard gamma value of the existing display device, i.e. when displaying normally, X gray-scale brightness is 255 gray-scale brightness (X/255) 2.2 。
Specifically, taking the standard gamma value of the highlight display device 100 as 2.2 as an example, as shown in fig. 2, fig. 2 is a schematic diagram of three groups of gamma curves with gamma values of 2, 2.2 and 2.4 respectively provided by the embodiment of the present invention. Three groups of gamma curves with gamma values of 2, 2.2 and 2.4 are selected and simulated, and for each group of gamma curves, the 255 gray-scale brightness is the same and keeps constant. It can be clearly seen from the figure that, for a gamma value greater than 2.2, the luminance of gray levels 0 to 254 in the gamma curve with a gamma value of 2 > the luminance of gray levels 0 to 254 in the gamma curve with a gamma value of 2.2 > the luminance of gray levels 0 to 254 in the gamma curve with a gamma value of 2.4, it can be seen that, for a gamma value greater than 2.2, the luminance of gray levels 0 to 254 in the gamma curve is less than the luminance of gray levels 0 to 254 in the gamma curve with a standard gamma value of 2.2. For the gamma value less than the standard gamma value 2.2, the 0-254 gray scale brightness in the gamma curve is greater than the 0-254 gray scale brightness in the gamma curve with the standard gamma value 2.2. Therefore, the invention can improve the 0-254 gray scale brightness by reducing the gamma value of the highlight display device 100 relative to the standard gamma value of 2.2, i.e. by setting the target gamma value to be smaller than the standard gamma value.
Specifically, the target gamma value is less than 2.2.
Further, also taking the standard gamma value of the highlighting device 100 as 2.2 as an example, as shown in fig. 3, fig. 3 is a schematic diagram of a plurality of sets of gamma curves provided by the embodiment of the invention. Selecting and simulating a plurality of groups of gamma curves, wherein the plurality of groups of gamma curves comprise gamma curves with gamma values within the range of 0.1-2.2 and gamma curves with gamma values of 2.2, and specifically, the gamma values of the plurality of groups of gamma curves are respectively 0.1, 0.2, 0.3 … … 2.0.0, 2.1 and 2.2. Wherein, for each set of gamma curves, the brightness of 255 gray scales is the same and remains constant. As is clear from the figure, the gamma curve with a gamma value of 2.2 is located at the lowest of all the gamma curves, the gamma curve with a gamma value of 0.1 is located at the highest of all the gamma curves, and the gamma curve with a higher gamma value is located at the upper part of the gamma curve with a lower gamma value, for example, the gamma curve with a gamma value of 0.1 is located at the upper part of the gamma curve with a gamma value of 0.2, the gamma curve with a gamma value of 0.2 is located at the upper part … … of the gamma curve with a gamma value of 2.0 is located at the upper part of the gamma curve with a gamma value of 2.1, and the gamma curve with a gamma value of 2.1 is located at the upper part of the gamma curve with a gamma value of 2.2. That is, the gamma curves with the gamma values within the range of 0.1-2.2 are all above the gamma curve with the gamma value of 2.2, that is, the 0-254 gray-scale brightness of the gamma curve with the gamma value within the range of 0.1-2.2 is all greater than the 0-254 gray-scale brightness of the gamma curve with the gamma value of 2.2, that is, the lower the target gamma value is, the higher the 0-254 gray-scale brightness of the gamma curve is.
Specifically, in the embodiment of the present invention, in order to greatly increase the 0-254 gray scale brightness, the value range of the target gamma value can be set to 0.1-1.8.
As shown in fig. 4, fig. 4 is a schematic flowchart of a brightness adjusting method of a highlight display device according to an embodiment of the present invention. The embodiment of the invention also provides a brightness adjusting method of the highlight display device, which comprises the following steps:
s1: and acquiring a plurality of groups of gamma curves of the highlight display device and target gamma values corresponding to the X gray scales, wherein 255 gray scales of the plurality of groups of gamma curves correspond to the same brightness.
S2: and acquiring 255 gray-scale brightness according to the multiple groups of gamma curves.
S3: substituting the target gamma value and the 255 gray scale brightness into a gray scale brightness formula corresponding to the X gray scale to obtain X gray scale brightness; wherein, the X gray scale brightness formula is: x gray scale brightness 255 gray scale brightness (X/255) Target gamma value And the target gamma value is smaller than the standard gamma value of the highlight display device.
Specifically, the X gray level refers to any one of the gray levels 0 to 254, and the X gray level brightness refers to the brightness corresponding to any one of the gray levels 0 to 254 in each set of gamma curves.
According to the brightness adjusting method of the highlight display device, the watching effect of an image under sunlight is improved by improving 0-254 gray scale brightness, specifically, the 0-254 gray scale brightness is improved by changing the relative relation between the 0-254 gray scale brightness and the 255 gray scale brightness without changing the 255 gray scale brightness, and on the basis of improving the watching effect of the image under sunlight, compared with a mode of obtaining highlight display by increasing the highest brightness of a screen in the prior art, for example, by increasing backlight power or increasing the number of light emitting diodes, the heat dissipation requirement of the highlight display device is reduced, the method is particularly suitable for being used in an outdoor environment, the service life of the highlight display device is prolonged, and the cost is reduced.
In an embodiment of the present invention, as shown in fig. 5, fig. 5 is a flowchart illustrating an embodiment of step S2 of a brightness adjustment method for a highlighting device according to an embodiment of the present invention, specifically, the acquiring a target gamma value corresponding to the X gray scale includes the following steps:
s11: and acquiring the brightness gain multiple corresponding to the X gray scale.
S12: and obtaining the target gamma value according to the brightness gain multiple and a pre-obtained target gamma value pre-estimation strategy.
Specifically, a brightness gain multiple corresponding to the X gray scale may be determined according to an actual brightness requirement, where the brightness gain multiple is a ratio of the X gray scale brightness corresponding to a target gamma value to the X gray scale brightness corresponding to a standard gamma value of the highlight display device. For example, when the standard gamma value is 2.2, the brightness gain multiple is the ratio of the brightness of the X gray scale in the gamma curve with the target gamma value to the brightness of the X gray scale in the gamma curve with the gamma value of 2.2. It can be understood that the larger the brightness gain multiple value, the higher the amplitude of the rise of the brightness for the X gray scale, and the smaller the brightness gain multiple value, the smaller the amplitude of the rise of the brightness for the X gray scale, wherein the brightness gain multiple value is greater than 1.
On the basis of the foregoing embodiment, as shown in fig. 6, fig. 6 is a flowchart of an embodiment of step S12 of a brightness adjustment method for a highlight display device according to an embodiment of the present invention, specifically, the obtaining the target gamma value according to the brightness gain multiple and a pre-obtained target gamma value estimation policy includes the following steps:
s121, obtaining a sample data set of the highlight display device, wherein the sample data set comprises a plurality of sets of sample data corresponding to the X gray scale in the gamma curve, and each sample data comprises the brightness gain multiple and the target gamma value.
And S122, simulating to obtain a target gamma value estimation model by using the sample data set.
S123, determining the target gamma value estimation strategy by using the target gamma value estimation model.
Specifically, a sample data set of the highlight display device is obtained, where the sample data set includes a brightness gain multiple and a target gamma value corresponding to the X gray scale in multiple sets of gamma curves, the X gray scale in each set of gamma curve corresponds to one brightness gain multiple and one target gamma value, the brightness gain multiple and the target gamma value corresponding to the same gray scale in different sets of gamma curves are different, and the brightness gain multiple and the target gamma value corresponding to different gray scales in the same set of gamma curves are also different.
After the sample data set is obtained, a mathematical model of the highlight display device is established by using simulation software such as Excel or Icepak, and after the mathematical model of the highlight display device is obtained, a target gamma value estimation strategy of the highlight display device can be determined by using the mathematical model.
Specifically, in order to clearly explain the technical solutions provided by the embodiments of the present invention, the embodiments of the present invention are described by taking an example in which the X gray scale is 50 gray scale and the standard gamma value of the highlight display device is 2.2.
FIG. 7 is a diagram illustrating a relationship between a luminance gain multiple and gray scale for different gamma values according to an embodiment of the present invention. Selecting and simulating a plurality of groups of relation curves of brightness gain multiples and gray scales with different gamma values, wherein the different gamma values comprise a target gamma value and a standard gamma value, the target gamma value is set in an interval range of 0.1-2.2 and is respectively 0.1, 0.2, 0.3 … … 2.0.0 and 2.1, and the standard gamma value is 2.2.
Gain multiples of brightness corresponding to 50 gray levels in a gamma curve having different gamma values with respect to brightness corresponding to 50 gray levels in a gamma curve having a gamma value of 2.2 are calculated, respectively. For example, the gain multiple of the luminance corresponding to the 50 gray scale in the gamma curve with the gamma value of 0.1 with respect to the luminance corresponding to the 50 gray scale in the gamma curve with the gamma value of 2.2 is 30.6, the gain multiple of the luminance corresponding to the 50 gray scale in the gamma curve with the gamma value of 0.2 with respect to the luminance corresponding to the 50 gray scale in the gamma curve with the gamma value of 2.2 is 26.0 … …, the gain multiple of the luminance corresponding to the 50 gray scale in the gamma curve with the gamma value of 2.0 with respect to the luminance corresponding to the 50 gray scale in the gamma curve with the gamma value of 2.2 is 1.4, and the gain multiple of the luminance corresponding to the 50 gray scale in the gamma curve with the gamma value of 2.1 with respect to the luminance corresponding to the 50 gray scale in the gamma curve with the gamma value of 2.2 is 1.2. It can be seen that the lower the target gamma value is, the higher the gain multiple of the luminance corresponding to the 50 gray levels is.
The following table shows a corresponding relationship table between the brightness gain multiple and the target gamma value corresponding to the 50 gray levels, and other gray levels can be calculated according to the above method.
Since the number of data in the sample data set is limited, and the finally selected brightness gain multiple and the target gamma value are within a range, it is impossible to calculate all data in the range according to this method, and therefore, according to a plurality of sample data in the sample data set, as shown in fig. 8, fig. 8 is a schematic diagram of a relationship curve between the brightness gain multiple and the target gamma value corresponding to 50 gray levels provided by the embodiment of the present invention. And fitting to obtain a relation curve of the brightness gain multiple corresponding to the 50 gray scales and the gamma value, wherein the ordinate in the relation curve represents the target gamma value, the abscissa represents the brightness gain multiple, and fitting calculation is performed according to the relation curve to obtain a target gamma value estimation formula of the high-brightness display device.
In the above embodiment, the estimation formula of the target gamma value corresponding to the 50 gray levels obtained by fitting is as follows:
Y＝-0.0002027*x 3 +0.0122480*x 2 -0.2583185 × x + 2.2833934; wherein X is the brightness gain multiple and Y is the target gamma value.
After the target gamma value estimation formula is obtained, if the target gamma value corresponding to the 50 gray scales is to be estimated, only the brightness gain multiple corresponding to the 50 gray scales needs to be confirmed, and the brightness gain multiple is substituted into the target gamma value estimation formula to obtain the target gamma value corresponding to the 50 gray scales.
Furthermore, if the target gamma values corresponding to other gray scales are to be estimated, only the brightness gain multiples corresponding to the other gray scales need to be confirmed, and the brightness gain multiples are substituted into the target gamma value estimation formula to obtain the target gamma values corresponding to the gray scales.
Further, in an embodiment, a brightness gain multiple may also be obtained according to the target gamma value, the target gamma value is determined first, and then the brightness gain multiple is obtained according to the target gamma value, so as to obtain the sample data set.
The following table shows a corresponding relationship table of the target gamma value and the brightness gain multiple corresponding to the 50 gray levels, and other gray levels can be calculated according to the method.
Similarly, since the number of data in the sample data set is limited, and the finally selected brightness gain multiple and the target gamma value are within a range, it is impossible to calculate all data in the range according to this method, and therefore, according to a plurality of sample data in the sample data set, as shown in fig. 9, fig. 9 is a schematic diagram of a relationship curve between the target gamma value and the brightness gain multiple corresponding to 50 gray levels provided by the embodiment of the present invention. And fitting to obtain a relation curve of the target gamma value corresponding to the 50 gray scales and the brightness gain multiple, wherein the ordinate in the relation curve represents the brightness gain multiple, the abscissa represents the target gamma value, and fitting calculation is performed according to the relation curve to obtain a brightness gain multiple estimation formula of the high-brightness display device.
In the above embodiment, the estimation formula of the brightness gain multiple corresponding to the 50 gray levels obtained by fitting is as follows:
Y＝＝-4.7417*X 3 +25.526*X 2 -48.715X + 34.784; wherein X is the target gamma value and Y is the brightness gain multiple.
After the brightness gain multiple estimation formula is obtained, if the brightness gain multiple corresponding to the 50 gray scales is to be estimated, only the target gamma value corresponding to the 50 gray scales needs to be confirmed, and the target gamma value is substituted into the brightness gain multiple estimation formula to obtain the brightness gain multiple corresponding to the 50 gray scales.
Furthermore, if the brightness gain multiple corresponding to other gray scales is to be estimated, only the target gamma value corresponding to other gray scales needs to be confirmed, and the brightness gain multiple is substituted into the brightness gain multiple estimation formula to obtain the brightness gain multiple corresponding to the gray scale.
Specifically, in the embodiment of the present invention, the target gamma value is less than 2.2.
Furthermore, in the embodiment of the invention, the value range of the target gamma value is set to be 0.1-1.8.
According to the brightness adjusting method of the highlight display device, 255 gray scale brightness is not changed for each group of gamma curves, 0-254 gray scale brightness is improved by changing the relative relation between 0-254 gray scale brightness and 255 gray scale brightness, the sunlight image watching effect is improved, the heat dissipation requirement on the highlight display device is reduced, and the service life of the highlight display device is prolonged.
The beneficial effects are that: according to the highlight display device and the brightness adjusting method thereof provided by the embodiment of the invention, the highlight display device comprises a plurality of groups of gamma curves, 255 gray scales of the gamma curves correspond to the same brightness, the brightness of the 255 gray scale is not changed for each group of gamma curves, the brightness of the 0-254 gray scale is improved by changing the relative relation between the brightness of the 0-254 gray scale and the brightness of the 255 gray scale, the screen content can be clearly seen when the highlight display device is used in the daylight outdoors, and the watching effect of images in the daylight is improved. In addition, compared with the mode of obtaining highlight display by increasing the highest brightness of a screen in the prior art, for example, by increasing the backlight power or increasing the number of light emitting diodes, the highlight display device provided by the invention reduces the heat dissipation requirement on the highlight display device, is beneficial to prolonging the service life of the highlight display device and reduces the cost.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (7)
1. The highlight display device is characterized by comprising a highlight adjusting unit, wherein the highlight adjusting unit comprises a plurality of groups of gamma curves, 255 gray scales of the gamma curves correspond to the same brightness, and a gray scale brightness formula corresponding to an X gray scale of each group of gamma curves is that X gray scale brightness is 255 gray scale brightness (X/255) Target gamma value In a plurality of groupsIn the gamma curve, the target gamma value is smaller than the standard gamma value of the highlight display device; the target gamma value is obtained by a brightness gain multiple and a pre-obtained target gamma value pre-estimation strategy, wherein the brightness gain multiple is the ratio of the X gray scale brightness corresponding to the target gamma value to the X gray scale brightness corresponding to the standard gamma value of the highlight display device; the target gamma value prediction strategy is determined by a target gamma value prediction model obtained by simulating a sample data set of the highlight display device, the sample data set comprises a plurality of groups of sample data corresponding to the X gray scale in the gamma curve, and each sample data comprises a brightness gain multiple and a target gamma value.
2. The highlighting apparatus of claim 1, wherein the target gamma value is less than 2.2.
3. The highlight display device according to claim 2, wherein the value range of the target gamma value is 0.1-1.8.
4. A brightness adjustment method of a highlight display device according to any one of claims 1 to 3, characterized in that said brightness adjustment method comprises the steps of:
acquiring a plurality of groups of gamma curves of the highlight display device and target gamma values corresponding to the X gray scale, wherein 255 gray scales of the plurality of groups of gamma curves correspond to the same brightness;
acquiring 255 gray scale brightness according to the multiple groups of gamma curves; and
substituting the target gamma value and the 255 gray scale brightness into a gray scale brightness formula corresponding to the X gray scale to obtain X gray scale brightness; the gray scale brightness formula corresponding to the X gray scale is as follows: x gray scale brightness 255 gray scale brightness (X/255) Target gamma value The target gamma value is smaller than the standard gamma value of the highlight display device;
the method for acquiring the target gamma value corresponding to the X gray scale comprises the following steps:
acquiring a brightness gain multiple corresponding to the X gray scale, wherein the brightness gain multiple is the ratio of the brightness of the X gray scale corresponding to the target gamma value to the brightness of the X gray scale corresponding to the standard gamma value of the high-brightness display device; and
obtaining the target gamma value according to the brightness gain multiple and a pre-obtained target gamma value pre-estimation strategy, and the method comprises the following steps:
acquiring a sample data set of the highlight display device, wherein the sample data set comprises a plurality of sets of sample data corresponding to the X gray scale in the gamma curve, and each sample data comprises the brightness gain multiple and the target gamma value;
simulating to obtain a target gamma value estimation model by using the sample data set; and
and determining the target gamma value prediction strategy by using the target gamma value prediction model.
5. The method according to claim 4, wherein a target gamma estimation formula of the highlight display device is obtained by fitting calculation according to a plurality of sample data in the sample data set.
6. The method as claimed in claim 5, wherein the target gamma value is obtained by substituting the brightness gain multiple into the target gamma value estimation formula.
7. The brightness adjustment method of the highlight display device according to claim 4, wherein the value range of the target gamma value is 0.1-1.8.
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