CN109686337B - Pixel signal conversion method and device - Google Patents
Pixel signal conversion method and device Download PDFInfo
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- CN109686337B CN109686337B CN201910145133.0A CN201910145133A CN109686337B CN 109686337 B CN109686337 B CN 109686337B CN 201910145133 A CN201910145133 A CN 201910145133A CN 109686337 B CN109686337 B CN 109686337B
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Abstract
The application relates to a pixel signal conversion method and a pixel signal conversion device, wherein a first stimulus value signal, a second stimulus value signal and a third stimulus value signal are obtained correspondingly according to an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal in a pixel signal. And obtaining a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after the gain processing. And respectively obtaining a first sub-pixel signal, a second sub-pixel signal and a third sub-pixel signal according to the difference value of the stimulus value signal and the corresponding fourth stimulus value signal. And converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal to be used as converted pixel signals. When the converted pixel signals are applied to a color-mixed color display formed by W, R, G, B four-color sub-pixels, the display effect is closer to the actual expression of the original R, G, B color-mixed color, the defect of large-viewing-angle color cast is reduced, and the display effect is improved.
Description
Technical Field
The present disclosure relates to the field of liquid crystal display technologies, and in particular, to a pixel signal conversion method and device.
Background
In a conventional lcd, three color light sources, which are generally generated by three sub-pixels of R (Red), G (Green), and B (Blue), are mixed to generate a desired display color. The R, G, B three-color light source is absorbed by R, G, B three sub-pixel absorbing photo resist material for the light band of the sub-pixel units other than R, G, B, so that R, G, B three sub-pixels generate the corresponding R, G, B three-color light source.
With the improvement of the resolution of the liquid crystal display, the increase of the sub-pixels overlaps the decrease of the aperture ratio of the corresponding pixels of the sub-pixels, which causes the transmittance loss of the high-resolution display and leads to the decrease of the light efficiency. Therefore, to balance the high resolution, transmittance, light efficiency, and backlight architecture cost of liquid crystal displays, mixed color displays have emerged that are constructed with W (White), R, G, B four-color subpixels. The W sub-pixel has no photoresistive absorption material for absorbing visible light energy, so that the transmittance and the light efficiency of the display can be improved.
However, the W sub-pixel has a large transmittance, and color shift is caused by light leakage at a large viewing angle, which affects the quality of the image viewed at the large viewing angle, and the optical characteristics of the lcd viewed at the large viewing angle cannot maintain the same correct color rendering as the viewing at the front viewing angle due to the different transmittance characteristics of the full-wavelength visible light at the front viewing angle and the large viewing angle.
In summary, when a mixed-color display composed of W, R, G, B four-color sub-pixels is driven by R, G, B three-color sub-pixel signals, there is a large viewing angle color shift defect.
Disclosure of Invention
Accordingly, it is desirable to provide a pixel signal conversion method and apparatus for solving the problem of large viewing angle color shift defect when R, G, B three-color sub-pixel signals are used for driving a color mixing color display composed of W, R, G, B four-color sub-pixels.
A pixel signal conversion method, comprising the steps of:
acquiring a pixel signal; the pixel signals comprise an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal; the pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel and a third sub-pixel in a specific pixel unit;
obtaining each first stimulus value signal of the initial first sub-pixel signal according to the initial first sub-pixel signal, obtaining each second stimulus value signal of the initial second sub-pixel signal according to the initial second sub-pixel signal, and obtaining each third stimulus value signal of the initial third sub-pixel signal according to the initial third sub-pixel signal;
acquiring a maximum value and a first minimum value of a stimulation value signal set, and determining a gain value according to the maximum value and the first minimum value; wherein the set of stimulus value signals includes a first stimulus value signal, a second stimulus value signal, and a third stimulus value signal;
performing gain processing on the first stimulus value signal, the second stimulus value signal and the third stimulus value signal according to the gain value;
obtaining a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after gain processing;
acquiring each fourth stimulus value signal of the fourth sub-pixel signal, acquiring a conversion first sub-pixel signal according to the difference value of any first stimulus value signal and the corresponding fourth stimulus value signal, acquiring a conversion second sub-pixel signal according to the difference value of any second stimulus value signal and the corresponding fourth stimulus value signal, and acquiring a conversion third sub-pixel signal according to the difference value of any third stimulus value signal and the corresponding fourth stimulus value signal;
converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal as converted pixel signals; the converted pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel in a specific pixel unit.
In one embodiment, the process of determining a gain value based on a maximum value and a first minimum value includes the steps of:
if the maximum value is smaller than a first minimum value of the preset multiple, determining the preset gain value as a gain value, otherwise, determining the gain value as follows:
q is a gain value, Max is a maximum value, Min is a first minimum value, and k is a preset multiple.
In one embodiment, the process of obtaining the fourth sub-pixel signal according to the second minimum value in the stimulation value signal set includes the steps of:
and assigning any fourth stimulus value signal as a second minimum value according to the relationship between the fourth sub-pixel signal and any fourth stimulus value signal of the fourth sub-pixel signal to obtain a fourth sub-pixel signal.
In one embodiment, the fourth stimulation value signal is a fourth X stimulation value signal, a fourth Y stimulation value signal, or a fourth Z stimulation value signal;
any one of the fourth stimulus value signals is a fourth Y stimulus value signal.
In one embodiment, if the second minimum value of the set of gain-processed stimulus value signals is greater than 1, any of the fourth stimulus value signals is 1.
In one embodiment, the first stimulus value signal is a first X stimulus value signal, a first Y stimulus value signal, or a first Z stimulus value signal;
the second stimulation value signal is a second X stimulation value signal, a second Y stimulation value signal or a second Z stimulation value signal;
the third stimulus value signal is a third X stimulus value signal, a third Y stimulus value signal, or a third Z stimulus value signal.
In one embodiment, the set of stimulation value signals includes a first X stimulation value signal, a second Y stimulation value signal, and a third Z stimulation value signal.
In one embodiment, the process of obtaining each first stimulus value signal of the initial first sub-pixel signal according to the initial first sub-pixel signal is as follows:
a process of obtaining each second stimulus value signal of the initial second sub-pixel signal according to the initial second sub-pixel signal, as follows:
a process of obtaining each third stimulus value signal of the initial third sub-pixel signal according to the initial third sub-pixel signal, as follows:
wherein, RX is a first X stimulus value signal, RY is a first Y stimulus value signal, RZ is a first Z stimulus value signal, and R is an initial first sub-pixel signal; GX is a second X stimulus value signal, GY is a second Y stimulus value signal, GZ is a second Z stimulus value signal, and G is an initial second sub-pixel signal; BX is a third X stimulus value signal, BY is a third Y stimulus value signal, BZ is a third Z stimulus value signal, and B is an initial third sub-pixel signal; t is the maximum value of the pixel signal;
wherein, γ RX, γ RY and γ RZ are the power functions of the stimulus value of the initial first sub-pixel signal; gamma GX, gamma GY and gamma GZ are stimulation value power functions of the initial second sub-pixel signal; gamma BX, gamma BY, and gamma BZ are all power functions of the stimulus value of the initial third subpixel signal.
A pixel signal conversion apparatus comprising:
the pixel signal acquisition module is used for acquiring pixel signals; the pixel signals comprise an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal; the pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel and a third sub-pixel in a specific pixel unit;
the signal processing module is used for obtaining each first stimulus value signal of the initial first sub-pixel signal according to the initial first sub-pixel signal, obtaining each second stimulus value signal of the initial second sub-pixel signal according to the initial second sub-pixel signal, and obtaining each third stimulus value signal of the initial third sub-pixel signal according to the initial third sub-pixel signal;
the gain value determining module is used for acquiring the maximum value and the first minimum value of the stimulation value signal set and determining a gain value according to the maximum value and the first minimum value; wherein the set of stimulus value signals includes a first stimulus value signal, a second stimulus value signal, and a third stimulus value signal;
the gain processing module is used for performing gain processing on the first stimulus value signal, the second stimulus value signal and the third stimulus value signal according to the gain value;
a fourth sub-pixel obtaining module, configured to obtain a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after the gain processing;
a conversion sub-pixel obtaining module, configured to obtain each fourth stimulus value signal of the fourth sub-pixel signals, obtain a conversion first sub-pixel signal according to a difference between any first stimulus value signal and the corresponding fourth stimulus value signal, obtain a conversion second sub-pixel signal according to a difference between any second stimulus value signal and the corresponding fourth stimulus value signal, and obtain a conversion third sub-pixel signal according to a difference between any third stimulus value signal and the corresponding fourth stimulus value signal;
the signal conversion module is used for converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal to be used as converted pixel signals; the converted pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel in a specific pixel unit.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
acquiring a pixel signal; the pixel signals comprise an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal; the pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel and a third sub-pixel in a specific pixel unit;
obtaining each first stimulus value signal of the initial first sub-pixel signal according to the initial first sub-pixel signal, obtaining each second stimulus value signal of the initial second sub-pixel signal according to the initial second sub-pixel signal, and obtaining each third stimulus value signal of the initial third sub-pixel signal according to the initial third sub-pixel signal;
acquiring a maximum value and a first minimum value of a stimulation value signal set, and determining a gain value according to the maximum value and the first minimum value; wherein the set of stimulus value signals includes a first stimulus value signal, a second stimulus value signal, and a third stimulus value signal;
performing gain processing on the first stimulus value signal, the second stimulus value signal and the third stimulus value signal according to the gain value;
obtaining a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after gain processing;
acquiring each fourth stimulus value signal of the fourth sub-pixel signal, acquiring a conversion first sub-pixel signal according to the difference value of any first stimulus value signal and the corresponding fourth stimulus value signal, acquiring a conversion second sub-pixel signal according to the difference value of any second stimulus value signal and the corresponding fourth stimulus value signal, and acquiring a conversion third sub-pixel signal according to the difference value of any third stimulus value signal and the corresponding fourth stimulus value signal;
converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal as converted pixel signals; the converted pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel in a specific pixel unit.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
acquiring a pixel signal; the pixel signals comprise an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal; the pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel and a third sub-pixel in a specific pixel unit;
obtaining each first stimulus value signal of the initial first sub-pixel signal according to the initial first sub-pixel signal, obtaining each second stimulus value signal of the initial second sub-pixel signal according to the initial second sub-pixel signal, and obtaining each third stimulus value signal of the initial third sub-pixel signal according to the initial third sub-pixel signal;
acquiring a maximum value and a first minimum value of a stimulation value signal set, and determining a gain value according to the maximum value and the first minimum value; wherein the set of stimulus value signals includes a first stimulus value signal, a second stimulus value signal, and a third stimulus value signal;
performing gain processing on the first stimulus value signal, the second stimulus value signal and the third stimulus value signal according to the gain value;
obtaining a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after gain processing;
acquiring each fourth stimulus value signal of the fourth sub-pixel signal, acquiring a conversion first sub-pixel signal according to the difference value of any first stimulus value signal and the corresponding fourth stimulus value signal, acquiring a conversion second sub-pixel signal according to the difference value of any second stimulus value signal and the corresponding fourth stimulus value signal, and acquiring a conversion third sub-pixel signal according to the difference value of any third stimulus value signal and the corresponding fourth stimulus value signal;
converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal as converted pixel signals; the converted pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel in a specific pixel unit.
According to the pixel signal conversion method and device, the corresponding first stimulus value signal, second stimulus value signal and third stimulus value signal are obtained according to the initial first sub-pixel signal, the initial second sub-pixel signal and the initial third sub-pixel signal in the pixel signals. Further, the stimulation value signal set is subjected to gain processing through a gain value determined by the maximum value and the first minimum value of the stimulation value signal set, and a fourth sub-pixel signal is obtained according to the second minimum value of the stimulation value signal set after the gain processing. And simultaneously respectively obtaining a first sub-pixel signal, a second sub-pixel signal and a third sub-pixel signal according to the difference value of the stimulus value signal and the corresponding fourth stimulus value signal. And finally, converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal to be used as converted pixel signals. Therefore, when the converted pixel signals are applied to a color-mixed color display formed by W, R, G, B four-color sub-pixels, the display effect is closer to the actual expression of the original R, G, B color-mixed color, the defect of large-viewing-angle color cast is reduced, and the display effect is improved.
Drawings
FIG. 1 is a schematic flow chart illustrating a pixel signal conversion method according to an embodiment;
FIG. 2 is a schematic diagram of a four color display array;
FIG. 3 is a graph illustrating a set of stimulus value signals according to an embodiment;
FIG. 4 is a graph illustrating a stimulation value signal set curve according to another embodiment;
FIG. 5 is a flowchart of a pixel signal conversion method according to another embodiment;
FIG. 6 is a diagram of conventional gray scale signals;
FIG. 7 is a gray scale signal diagram with a preset multiple of 2;
FIG. 8 is a diagram of gray scale signals with a preset multiple of 1.5;
FIG. 9 is a diagram of gray scale signals with a preset multiple of 2.5;
FIG. 10 is a gray scale signal contrast diagram;
fig. 11 is a block diagram of a pixel signal conversion device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The application provides a pixel signal conversion method, which comprises the following steps:
fig. 1 is a schematic flow chart of a pixel signal conversion method according to an embodiment, and as shown in fig. 1, the pixel signal conversion method includes steps S100 to S106:
s100, acquiring a pixel signal; the pixel signals comprise an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal; the pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel and a third sub-pixel in a specific pixel unit;
fig. 2 is a schematic diagram of a four-color display array, and as shown in fig. 2, the four-color display array includes a plurality of four-color pixel units 200 arranged in rows and columns, and each of the four-color pixel units 200 includes four sub-pixels, i.e., an R sub-pixel, a G sub-pixel, a B sub-pixel, and a W (White) sub-pixel. In a conventional three-color display array, a plurality of three-color pixel units are arranged in rows and columns, and each three-color pixel unit includes three sub-pixels, i.e., an R sub-pixel, a G sub-pixel, and a B sub-pixel. The specific pixel unit can be any one of the pixel units in the four-color display array shown in fig. 2. The pixel signals before conversion acquired in step S100 are used to correspondingly drive the R, G, and B sub-pixels in a specific pixel unit for changing the brightness and darkness of the correspondingly driven sub-pixels. As one of the driving methods, the R sub-pixel is driven by an initial first sub-pixel signal, the G sub-pixel is driven by an initial second sub-pixel signal, and the B sub-pixel is driven by an initial third sub-pixel signal. Correspondingly, the fourth sub-pixel signal is used for driving the W sub-pixel.
S101, obtaining each first stimulus value signal of an initial first sub-pixel signal according to an initial first sub-pixel signal, obtaining each second stimulus value signal of an initial second sub-pixel signal according to an initial second sub-pixel signal, and obtaining each third stimulus value signal of an initial third sub-pixel signal according to an initial third sub-pixel signal;
the pixel signal includes three sub-pixel signals, namely, an initial first sub-pixel signal, an initial second sub-pixel signal, and an initial third sub-pixel signal. Wherein, each sub-pixel signal corresponds to a stimulus value signal according to the optical brightness. It should be noted that one sub-pixel signal may correspond to a plurality of stimulus value signals. Specifically, a type of stimulus value signal corresponding to the initial first sub-pixel signal is a first stimulus value signal, a type of stimulus value signal corresponding to the initial second sub-pixel signal is a second stimulus value signal, and a type of stimulus value signal corresponding to the initial third sub-pixel signal is a third stimulus value signal.
In one embodiment, the first stimulus value signal is a first X stimulus value signal or a first Y stimulus value signal or a first Z stimulus value signal;
the second stimulation value signal is a second X stimulation value signal or a second Y stimulation value signal or a second Z stimulation value signal;
the third stimulus value signal is a third X stimulus value signal or a third Y stimulus value signal or a third Z stimulus value signal.
Correspondingly, the process of obtaining each first stimulus value signal of the initial first sub-pixel signal according to the initial first sub-pixel signal is as follows:
a process of obtaining each second stimulus value signal of the initial second sub-pixel signal according to the initial second sub-pixel signal, as follows:
a process of obtaining each third stimulus value signal of the initial third sub-pixel signal according to the initial third sub-pixel signal, as follows:
wherein, RX is a first X stimulus value signal, RY is a first Y stimulus value signal, RZ is a first Z stimulus value signal, and R is an initial first sub-pixel signal; GX is a second X stimulus value signal, GY is a second Y stimulus value signal, GZ is a second Z stimulus value signal, and G is an initial second sub-pixel signal; BX is a third X stimulus value signal, BY is a third Y stimulus value signal, BZ is a third Z stimulus value signal, and B is an initial third sub-pixel signal; t is the maximum value of the pixel signal;
wherein the maximum value of the pixel signal depends on the type of the display image, for example, the maximum value of the pixel signal is 2 when displaying 8-bit gray scale image8-1＝255。
Wherein, γ RX, γ RY and γ RZ are the power functions of the stimulus value of the initial first sub-pixel signal; gamma GX, gamma GY and gamma GZ are stimulation value power functions of the initial second sub-pixel signal; gamma BX, gamma BY, and gamma BZ are all power functions of the stimulus value of the initial third subpixel signal.
S102, acquiring a maximum value and a first minimum value of a stimulation value signal set, and determining a gain value according to the maximum value and the first minimum value; wherein the set of stimulus value signals includes a first stimulus value signal, a second stimulus value signal, and a third stimulus value signal;
wherein, RX is a first X stimulus value signal, RY is a first Y stimulus value signal, and RZ is a first Z stimulus value signal; GX is a second X stimulus value signal, GY is a second Y stimulus value signal, and GZ is a second Z stimulus value signal; BX is the third X stimulus value signal, BY is the third Y stimulus value signal, and BZ is the third Z stimulus value signal, for example, the stimulus value signal set can be a set based on each different stimulus value signal, such as (RX, GX, BX), (RX, GY, BZ), or (RY, GY, BY). As an alternative embodiment, the set of stimulus value signals is (RX, GY, BZ). Based on this, the maximum value of the stimulus value signal set is Max (RX, GY, BZ) and the first minimum value is Min (RX, GY, BZ).
Wherein the gain value may be determined based on a ratio or difference of the maximum value and the first minimum value.
In one embodiment, the process of determining the gain value according to the maximum value and the first minimum value in step S102 includes the steps of:
if the maximum value is smaller than a first minimum value of the preset multiple, determining the preset gain value as a gain value, otherwise, determining the gain value as follows:
q is a gain value, Max is a maximum value, Min is a first minimum value, and k is a preset multiple.
As an alternative embodiment, the preset gain value is 2. That is, when Max-k Min is less than 0, the gain value is the preset gain value, i.e., Q is 2. At Max-k Min >0, the gain value is given by:
wherein, the preset multiple can be adjusted according to the image quality color purity, if the image quality with high brightness and low pure color vividness is required to be presented, k is more than 2; if a high color vividness representation is desired, reducing the effect of the fourth sub-pixel signal on the overall vividness may be chosen to be 1< k < 2.
S103, performing gain processing on the first stimulus value signal, the second stimulus value signal and the third stimulus value signal according to the gain value;
wherein, as above, the first stimulus value signal comprises RX, RY and RZ. The first stimulus value signal is subjected to gain processing, and taking the gain value Q as 2 as an example, the gain-processed first stimulus value signal is twice as large as the original stimulus value signal, i.e., 2RX, 2RY, and 2 RZ. Similarly, the second stimulus value signals after the double gain processing are 2GX, 2GY and 2 GZ; the third stimulus value signals after the double gain processing are 2BX, 2BY and 2 BZ.
In one embodiment, the set of stimulus value signals includes a RY stimulus value signal, a GY stimulus value signal, and a BY stimulus value signal.
Assuming that the stimulus value signal set is U1, U1 is (RY, GY, BY). Fig. 3 is a graph illustrating an aggregate of stimulus value signals according to an embodiment, where the horizontal axis represents sub-pixel signals and the vertical axis represents stimulus value signals as shown in fig. 3. The variation of the stimulus value signals from the set of stimulus value signals with sub-pixel signals is characterized as shown in fig. 3. Wherein the first minimum Min1 of the set of stimulus value signals is Min (RY, GY, BY). Note that after the double gain processing, U2 is (2RY, 2GY, 2BY).
In one embodiment, the set of stimulation value signals includes a first X stimulation value signal, a second Y stimulation value signal, and a third Z stimulation value signal.
Assuming that the stimulus value signal set is U2, U2 ═ (RX, GY, BZ). Note that after the double gain processing, U2 is (2RX, 2GY, 2 BZ). Fig. 4 is a graph illustrating an aggregate of stimulus value signals according to another embodiment, and as shown in fig. 4, the horizontal axis represents sub-pixel signals and the vertical axis represents stimulus value signals. The variation of the stimulus value signals from the set of stimulus value signals with sub-pixel signals is characterized as shown in fig. 3. As shown in fig. 3, the stimulus value signal set U2 is closer to the stimulus value signal set U1 in proportion to the stimulus value signals in the stimulus value signal set U2, so that the sub-pixel signals after the subsequent conversion can be closer to the actual expression of the original first, second, and third mixed color.
Wherein the first minimum Min1 of the set of stimulus value signals is Min (RX, GY, BZ).
S104, obtaining a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after gain processing;
taking the combination of stimulus value signals as (RX, GY, BZ) for example, let gain value Q be 2, and the set of stimulus value signals after gain processing be (2RX, 2GY, 2BZ), i.e., the second minimum value is Min2(2RX, 2GY, 2 BZ).
Fig. 5 is a flowchart of a pixel signal conversion method according to another embodiment, and as shown in fig. 5, the process of obtaining a fourth sub-pixel signal according to the minimum value in the set of stimulation value signals after the gain processing in step S104 includes step S200:
and S200, assigning any fourth stimulation value signal as a second minimum value according to the relationship between the fourth sub-pixel signal and any fourth stimulation value signal of the fourth sub-pixel signal to obtain a fourth sub-pixel signal.
Correspondingly, the fourth sub-pixel signal also includes a fourth X stimulus value signal, a fourth Y stimulus value signal, or a fourth Z stimulus value signal. The relationship between the fourth sub-pixel signal and each corresponding stimulus value signal is as follows:
wherein WX is a fourth X stimulus value signal, WY is a fourth Y stimulus value signal, WZ is a fourth Z stimulus value signal, and W is a fourth sub-pixel signal; t is the pixel signal maximum. γ WX, γ WY, and γ WZ are all stimulation value power functions of the fourth sub-pixel signal.
After determining the second minimum value, any fourth stimulus value signal can be assigned to the second minimum value, i.e., WX ═ second minimum value, WY ═ second minimum value, or WZ ═ second minimum value. As an alternative embodiment, the fourth Y stimulus value signal is assigned to the second minimum value. That is, in one embodiment, any of the fourth stimulus value signals is a fourth Y stimulus value signal.
In one embodiment, if the second minimum value is greater than 1, any fourth stimulus value signal equal to the second minimum value is 1.
Correspondingly, after determining the stimulus value signal of the fourth sub-pixel signal, the fourth sub-pixel signal is obtained as follows:
wherein WX is a fourth X stimulus value signal, WY is a fourth Y stimulus value signal, WZ is a fourth Z stimulus value signal, and W is a fourth sub-pixel signal; t is the pixel signal maximum. γ WX, γ WY, and γ WZ are all stimulation value power functions of the fourth sub-pixel signal.
S105, obtaining each fourth stimulus value signal of the fourth sub-pixel signals, obtaining conversion first sub-pixel signals according to the difference value of any first stimulus value signal and the corresponding fourth stimulus value signal, obtaining conversion second sub-pixel signals according to the difference value of any second stimulus value signal and the corresponding fourth stimulus value signal, and obtaining conversion third sub-pixel signals according to the difference value of any third stimulus value signal and the corresponding fourth stimulus value signal;
the first stimulus value signal, the second stimulus value signal, and the third stimulus value signal in step S105 are all stimulus value signals subjected to gain processing.
In one embodiment, the fourth stimulation value signal corresponding to the first X stimulation value signal is a fourth X stimulation value signal, the fourth stimulation value signal corresponding to the first Y stimulation value signal is a fourth Y stimulation value signal, and the fourth stimulation value signal corresponding to the first Z stimulation value signal is a fourth Z stimulation value signal; a fourth stimulus value signal corresponding to the second X stimulus value signal is a fourth X stimulus value signal, a fourth stimulus value signal corresponding to the second Y stimulus value signal is a fourth Y stimulus value signal, and a fourth stimulus value signal corresponding to the second Z stimulus value signal is a fourth Z stimulus value signal; the fourth stimulus value signal corresponding to the third X stimulus value signal is a fourth X stimulus value signal, the fourth stimulus value signal corresponding to the third Y stimulus value signal is a fourth Y stimulus value signal, and the fourth stimulus value signal corresponding to the third Z stimulus value signal is a fourth Z stimulus value signal.
Taking any one of the first stimulation value signals after gain processing as RX', the first sub-pixel signal is converted as follows:
wherein the content of the first and second substances,
to convert the first subpixel signal, WX is the fourth X stimulus value signal, and γ RX is the stimulus value power function of the original first subpixel signal.
Similarly, the second sub-pixel signal can be converted:
taking any one of the second stimulus value signals after gain processing as GY', the second sub-pixel signal is converted as follows:
wherein the content of the first and second substances,
for converting the second sub-pixel signal, WY is the fourth Y stimulus value signal, and γ GY is the stimulus value power function of the initial second sub-pixel signal.
Similarly, the second sub-pixel signal can be converted:
taking any one of the third stimulus value signals after gain processing as BZ', the third sub-pixel signal is converted as follows:
wherein the content of the first and second substances,
to convert the third subpixel signal, WZ is the fourth Z stimulus value signal and γ BZ is the stimulus value power function of the initial third subpixel signal.
S106, converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal to be used as converted pixel signals; the converted pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel in a specific pixel unit.
The converted pixel signals comprise a first sub-pixel signal, a second sub-pixel signal, a third sub-pixel signal and a fourth sub-pixel signal. Correspondingly, as shown in fig. 2, the first sub-pixel signal is converted to drive the first sub-pixel, the second sub-pixel signal is converted to drive the second sub-pixel, the third sub-pixel signal is converted to drive the third sub-pixel, and the fourth sub-pixel signal drives the fourth sub-pixel.
The following explains the technical effects of the embodiment of the present invention by taking the first sub-pixel as the R sub-pixel, the second sub-pixel as the G sub-pixel, the third sub-pixel as the B sub-pixel, and the fourth sub-pixel as the W sub-pixel as an example:
fig. 6 is a diagram of conventional gray scale signals, and as shown in fig. 6, when R, G, B three sub-pixel signals R keep 255 the maximum gray scale signal, the input signal G ═ B changes linearly from the minimum gray scale signal 0 to the maximum gray scale signal 255. FIG. 7 is a diagram of gray scale signals with a predetermined multiple of 2, and when the predetermined multiple is 2, the converted W, R, G, B quad-sub-pixel signals are shown in FIG. 7. FIG. 8 is a gray scale signal diagram with a predetermined multiple of 1.5, and the converted W, R, G, B four-subpixel signals are shown in FIG. 8. FIG. 9 is a diagram of gray scale signals with a predetermined multiple of 2.5, and the converted W, R, G, B four-subpixel signals are shown in FIG. 9.
Fig. 10 is a gray scale signal comparison chart, and as shown in fig. 10, fig. 10 compares W sub-pixel signals in fig. 7, 8 and 9. As shown in fig. 10, when the preset multiple k is 1.5, the input signal of R, G, B three-subpixel signal G-B increases, and the proportional speed curve of W-subpixel signal output becomes more gradual, so that the proportion of W-subpixel is reduced when the overall W, R, G, B four-subpixel image quality is presented, and the color vividness of the overall image quality is more vivid than the adjustment factor k-2, as compared with the preset multiple k-2. Similarly, when the adjustment factor k is 2.5, as the input signal of R, G, B three-subpixel signal G-B increases, the proportional rate curve of W-subpixel signal output becomes steeper, so that the proportion of W-subpixel is increased when the whole W, R, G, B four-subpixel image quality is presented, and the color vividness of the whole image quality is less vivid than that of the adjustment factor k being 2, but the brightness contrast of the image quality is increased.
In the pixel signal conversion method according to any of the embodiments, the first stimulus value signal, the second stimulus value signal, and the third stimulus value signal are obtained according to the initial first sub-pixel signal, the initial second sub-pixel signal, and the initial third sub-pixel signal in the pixel signal. Further, the stimulation value signal set is subjected to gain processing through a gain value determined by the maximum value and the first minimum value of the stimulation value signal set, and a fourth sub-pixel signal is obtained according to the second minimum value of the stimulation value signal set after the gain processing. And simultaneously respectively obtaining a first sub-pixel signal, a second sub-pixel signal and a third sub-pixel signal according to the difference value of the stimulus value signal and the corresponding fourth stimulus value signal. And finally, converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal to be used as converted pixel signals. Therefore, when the converted pixel signals are applied to a color-mixed color display formed by W, R, G, B four-color sub-pixels, the display effect is closer to the actual expression of the original R, G, B color-mixed color, the defect of large-viewing-angle color cast is reduced, and the display effect is improved.
The application provides a pixel signal conversion device:
fig. 11 is a block diagram of a pixel signal conversion device according to an embodiment, and as shown in fig. 11, the pixel signal conversion device includes blocks 100 to 106:
a pixel signal obtaining module 100, configured to obtain a pixel signal; the pixel signals comprise an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal; the pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel and a third sub-pixel in a specific pixel unit;
the signal processing module 101 is configured to obtain each first stimulus value signal of the initial first subpixel signal according to the initial first subpixel signal, obtain each second stimulus value signal of the initial second subpixel signal according to the initial second subpixel signal, and obtain each third stimulus value signal of the initial third subpixel signal according to the initial third subpixel signal;
the gain value determining module 102 is configured to obtain a maximum value and a first minimum value of the stimulation value signal set, and determine a gain value according to the maximum value and the first minimum value; wherein the set of stimulus value signals includes a first stimulus value signal, a second stimulus value signal, and a third stimulus value signal;
the gain processing module 103 is configured to perform gain processing on the first stimulus value signal, the second stimulus value signal, and the third stimulus value signal according to a gain value;
a fourth sub-pixel obtaining module 104, configured to obtain a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after the gain processing;
a conversion sub-pixel obtaining module 105, configured to obtain each fourth stimulus value signal of the fourth sub-pixel signals, obtain a conversion first sub-pixel signal according to a difference between any first stimulus value signal and the corresponding fourth stimulus value signal, obtain a conversion second sub-pixel signal according to a difference between any second stimulus value signal and the corresponding fourth stimulus value signal, and obtain a conversion third sub-pixel signal according to a difference between any third stimulus value signal and the corresponding fourth stimulus value signal;
a signal conversion module 106, configured to convert the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal, and the fourth sub-pixel signal as converted pixel signals; the converted pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel in a specific pixel unit.
The pixel signal conversion device obtains a first stimulus value signal, a second stimulus value signal and a third stimulus value signal according to an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal in the pixel signals. Further, the stimulation value signal set is subjected to gain processing through a gain value determined by the maximum value and the first minimum value of the stimulation value signal set, and a fourth sub-pixel signal is obtained according to the second minimum value of the stimulation value signal set after the gain processing. And simultaneously respectively obtaining a first sub-pixel signal, a second sub-pixel signal and a third sub-pixel signal according to the difference value of the stimulus value signal and the corresponding fourth stimulus value signal. And finally, converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal to be used as converted pixel signals. Therefore, when the converted pixel signals are applied to a color-mixed color display formed by W, R, G, B four-color sub-pixels, the display effect is closer to the actual expression of the original R, G, B color-mixed color, the defect of large-viewing-angle color cast is reduced, and the display effect is improved.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
acquiring a pixel signal; the pixel signals comprise an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal; the pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel and a third sub-pixel in a specific pixel unit;
obtaining each first stimulus value signal of the initial first sub-pixel signal according to the initial first sub-pixel signal, obtaining each second stimulus value signal of the initial second sub-pixel signal according to the initial second sub-pixel signal, and obtaining each third stimulus value signal of the initial third sub-pixel signal according to the initial third sub-pixel signal;
acquiring a maximum value and a first minimum value of a stimulation value signal set, and determining a gain value according to the maximum value and the first minimum value; wherein the set of stimulus value signals includes a first stimulus value signal, a second stimulus value signal, and a third stimulus value signal;
performing gain processing on the first stimulus value signal, the second stimulus value signal and the third stimulus value signal according to the gain value;
obtaining a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after gain processing;
acquiring each fourth stimulus value signal of the fourth sub-pixel signal, acquiring a conversion first sub-pixel signal according to the difference value of any first stimulus value signal and the corresponding fourth stimulus value signal, acquiring a conversion second sub-pixel signal according to the difference value of any second stimulus value signal and the corresponding fourth stimulus value signal, and acquiring a conversion third sub-pixel signal according to the difference value of any third stimulus value signal and the corresponding fourth stimulus value signal;
converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal as converted pixel signals; the converted pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel in a specific pixel unit.
According to the computer equipment, the corresponding first stimulation value signal, the second stimulation value signal and the third stimulation value signal are obtained according to the initial first sub-pixel signal, the initial second sub-pixel signal and the initial third sub-pixel signal in the pixel signals. Further, the stimulation value signal set is subjected to gain processing through a gain value determined by the maximum value and the first minimum value of the stimulation value signal set, and a fourth sub-pixel signal is obtained according to the second minimum value of the stimulation value signal set after the gain processing. And simultaneously respectively obtaining a first sub-pixel signal, a second sub-pixel signal and a third sub-pixel signal according to the difference value of the stimulus value signal and the corresponding fourth stimulus value signal. And finally, converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal to be used as converted pixel signals. Therefore, when the converted pixel signals are applied to a color-mixed color display formed by W, R, G, B four-color sub-pixels, the display effect is closer to the actual expression of the original R, G, B color-mixed color, the defect of large-viewing-angle color cast is reduced, and the display effect is improved.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring a pixel signal; the pixel signals comprise an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal; the pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel and a third sub-pixel in a specific pixel unit;
obtaining each first stimulus value signal of the initial first sub-pixel signal according to the initial first sub-pixel signal, obtaining each second stimulus value signal of the initial second sub-pixel signal according to the initial second sub-pixel signal, and obtaining each third stimulus value signal of the initial third sub-pixel signal according to the initial third sub-pixel signal;
acquiring a maximum value and a first minimum value of a stimulation value signal set, and determining a gain value according to the maximum value and the first minimum value; wherein the set of stimulus value signals includes a first stimulus value signal, a second stimulus value signal, and a third stimulus value signal;
performing gain processing on the first stimulus value signal, the second stimulus value signal and the third stimulus value signal according to the gain value;
obtaining a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after gain processing;
acquiring each fourth stimulus value signal of the fourth sub-pixel signal, acquiring a conversion first sub-pixel signal according to the difference value of any first stimulus value signal and the corresponding fourth stimulus value signal, acquiring a conversion second sub-pixel signal according to the difference value of any second stimulus value signal and the corresponding fourth stimulus value signal, and acquiring a conversion third sub-pixel signal according to the difference value of any third stimulus value signal and the corresponding fourth stimulus value signal;
converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal as converted pixel signals; the converted pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel in a specific pixel unit.
The computer-readable storage medium obtains a first stimulus value signal, a second stimulus value signal, and a third stimulus value signal according to the initial first sub-pixel signal, the initial second sub-pixel signal, and the initial third sub-pixel signal in the pixel signals. Further, the stimulation value signal set is subjected to gain processing through a gain value determined by the maximum value and the first minimum value of the stimulation value signal set, and a fourth sub-pixel signal is obtained according to the second minimum value of the stimulation value signal set after the gain processing. And simultaneously respectively obtaining a first sub-pixel signal, a second sub-pixel signal and a third sub-pixel signal according to the difference value of the stimulus value signal and the corresponding fourth stimulus value signal. And finally, converting the first sub-pixel signal, the second sub-pixel signal, the third sub-pixel signal and the fourth sub-pixel signal to be used as converted pixel signals. Therefore, when the converted pixel signals are applied to a color-mixed color display formed by W, R, G, B four-color sub-pixels, the display effect is closer to the actual expression of the original R, G, B color-mixed color, the defect of large-viewing-angle color cast is reduced, and the display effect is improved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A pixel signal conversion method, comprising the steps of:
acquiring a pixel signal; the pixel signals comprise an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal; the pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel and a third sub-pixel in a specific pixel unit;
obtaining each first stimulus value signal of the initial first sub-pixel signal according to the initial first sub-pixel signal, obtaining each second stimulus value signal of the initial second sub-pixel signal according to the initial second sub-pixel signal, and obtaining each third stimulus value signal of the initial third sub-pixel signal according to the initial third sub-pixel signal;
acquiring a maximum value and a first minimum value of a stimulation value signal set, and determining a gain value according to the maximum value and the first minimum value; wherein the set of stimulus value signals includes one of the first stimulus value signal, one of the second stimulus value signal, and one of the third stimulus value signal;
performing gain processing on the first stimulus value signal, the second stimulus value signal and the third stimulus value signal according to the gain value;
obtaining a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after gain processing;
obtaining fourth stimulus value signals of the fourth sub-pixel signals, obtaining conversion first sub-pixel signals according to the difference value of any one of the first stimulus value signals and the corresponding fourth stimulus value signal, obtaining conversion second sub-pixel signals according to the difference value of any one of the second stimulus value signals and the corresponding fourth stimulus value signal, and obtaining conversion third sub-pixel signals according to the difference value of any one of the third stimulus value signals and the corresponding fourth stimulus value signal, wherein the fourth stimulus value signals comprise a fourth X stimulus value signal, a fourth Y stimulus value signal and a fourth Z stimulus value signal, the fourth X stimulus value signal, the fourth Y stimulus value signal and the fourth Z stimulus value signal are in a functional relationship with the fourth sub-pixel signals respectively, and the fourth stimulus value signals corresponding to the first stimulus value signals are different from each other;
taking the converted first sub-pixel signal, the converted second sub-pixel signal, the converted third sub-pixel signal and the fourth sub-pixel signal as converted pixel signals; the converted pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel in the specific pixel unit.
2. The pixel signal converting method according to claim 1, wherein said process of determining a gain value based on said maximum value and a first minimum value comprises the steps of:
if the maximum value is smaller than the first minimum value of a preset multiple, determining a preset gain value as the gain value, otherwise, the gain value is as follows:
and Q is the gain value, Max is the maximum value, Min is the first minimum value, and k is a preset multiple.
3. The pixel signal conversion method according to claim 1, wherein the process of obtaining a fourth sub-pixel signal according to a second minimum value in the set of stimulus value signals comprises the steps of:
and assigning any fourth stimulation value signal to be the second minimum value according to the relationship between the fourth sub-pixel signal and any fourth stimulation value signal of the fourth sub-pixel signal so as to obtain the fourth sub-pixel signal.
4. The pixel signal conversion method according to claim 3, wherein the fourth stimulus value signal is a fourth X stimulus value signal, a fourth Y stimulus value signal, or a fourth Z stimulus value signal;
any one of the fourth stimulus value signals is the fourth Y stimulus value signal.
5. The method according to claim 2, wherein if the second minimum value of the set of gain-processed stimulus value signals is greater than 1, any of the fourth stimulus value signals is 1.
6. The pixel signal conversion method according to claim 1, wherein the first stimulus value signal is a first X stimulus value signal, a first Y stimulus value signal, or a first Z stimulus value signal;
the second stimulus value signal is a second X stimulus value signal, a second Y stimulus value signal or a second Z stimulus value signal;
the third stimulus value signal is a third X stimulus value signal, a third Y stimulus value signal or a third Z stimulus value signal;
wherein the first X stimulus value signal or the second X stimulus value signal or the third X stimulus value signal corresponds to the fourth X stimulus value signal, the first Y stimulus value signal, the second Y stimulus value signal or the third Y stimulus value signal corresponds to the fourth Y stimulus value signal, and the first Z stimulus value signal, the second Z stimulus value signal or the third Z stimulus value signal corresponds to the fourth Z stimulus value signal.
7. The pixel signal conversion method according to claim 6, wherein the stimulus value signal set includes the first X stimulus value signal, the second Y stimulus value signal, and the third Z stimulus value signal.
8. The pixel signal converting method according to claim 6, wherein the process of obtaining each first stimulus value signal of the initial first sub-pixel signal according to the initial first sub-pixel signal is as follows:
the process of obtaining each second stimulus value signal of the initial second sub-pixel signal according to the initial second sub-pixel signal is as follows:
the process of obtaining each third stimulus value signal of the initial third sub-pixel signal according to the initial third sub-pixel signal is as follows:
wherein RX is the first X stimulus value signal, RY is the first Y stimulus value signal, RZ is the first Z stimulus value signal, and R is the initial first subpixel signal; GX is the second X stimulus value signal, GY is the second Y stimulus value signal, GZ is the second Z stimulus value signal, and G is the initial second sub-pixel signal; BX is the third X stimulus value signal, BY is the third Y stimulus value signal, BZ is the third Z stimulus value signal, and B is the initial third subpixel signal; t is the maximum value of the pixel signal;
wherein, γ RX, γ RY and γ RZ are the power functions of the stimulus value of the initial first sub-pixel signal; gamma GX, gamma GY and gamma GZ are stimulation value power functions of the initial second sub-pixel signal; gamma BX, gamma BY, and gamma BZ are all power functions of the stimulus value of the initial third subpixel signal.
9. A pixel signal conversion apparatus, comprising:
the pixel signal acquisition module is used for acquiring pixel signals; the pixel signals comprise an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal; the pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel and a third sub-pixel in a specific pixel unit;
a signal processing module, configured to obtain each first stimulus value signal of the initial first subpixel signal according to the initial first subpixel signal, obtain each second stimulus value signal of the initial second subpixel signal according to the initial second subpixel signal, and obtain each third stimulus value signal of the initial third subpixel signal according to the initial third subpixel signal;
the gain value determining module is used for acquiring the maximum value and the first minimum value of the stimulation value signal set and determining a gain value according to the maximum value and the first minimum value; wherein the set of stimulus value signals includes one of the first stimulus value signal, one of the second stimulus value signal, and one of the third stimulus value signal;
the gain processing module is used for performing gain processing on the first stimulus value signal, the second stimulus value signal and the third stimulus value signal according to the gain value;
a fourth sub-pixel obtaining module, configured to obtain a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after the gain processing;
a conversion sub-pixel obtaining module, configured to obtain each fourth stimulus value signal of the fourth sub-pixel signals, obtain a conversion first sub-pixel signal according to a difference between any one of the first stimulus value signals and a corresponding fourth stimulus value signal, obtain a conversion second sub-pixel signal according to a difference between any one of the second stimulus value signals and a corresponding fourth stimulus value signal, and obtain a conversion third sub-pixel signal according to a difference between any one of the third stimulus value signals and a corresponding fourth stimulus value signal; the fourth stimulus value signal comprises a fourth X stimulus value signal, a fourth Y stimulus value signal and a fourth Z stimulus value signal, the fourth X stimulus value signal, the fourth Y stimulus value signal and the fourth Z stimulus value signal are respectively in a functional relationship with the fourth sub-pixel signal, and the fourth stimulus value signals corresponding to the first stimulus value signals are different from each other;
a signal conversion module, configured to use the converted first sub-pixel signal, the converted second sub-pixel signal, the converted third sub-pixel signal, and the converted fourth sub-pixel signal as converted pixel signals; the converted pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel in the specific pixel unit.
10. A computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, carries out the steps of:
acquiring a pixel signal; the pixel signals comprise an initial first sub-pixel signal, an initial second sub-pixel signal and an initial third sub-pixel signal; the pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel and a third sub-pixel in a specific pixel unit;
obtaining each first stimulus value signal of the initial first sub-pixel signal according to the initial first sub-pixel signal, obtaining each second stimulus value signal of the initial second sub-pixel signal according to the initial second sub-pixel signal, and obtaining each third stimulus value signal of the initial third sub-pixel signal according to the initial third sub-pixel signal;
acquiring a maximum value and a first minimum value of a stimulation value signal set, and determining a gain value according to the maximum value and the first minimum value; wherein the set of stimulus value signals includes one of the first stimulus value signal, one of the second stimulus value signal, and one of the third stimulus value signal;
performing gain processing on the first stimulus value signal, the second stimulus value signal and the third stimulus value signal according to the gain value;
obtaining a fourth sub-pixel signal according to the second minimum value of the stimulation value signal set after gain processing;
obtaining fourth stimulus value signals of the fourth sub-pixel signals, obtaining conversion first sub-pixel signals according to the difference value of any one of the first stimulus value signals and the corresponding fourth stimulus value signal, obtaining conversion second sub-pixel signals according to the difference value of any one of the second stimulus value signals and the corresponding fourth stimulus value signal, and obtaining conversion third sub-pixel signals according to the difference value of any one of the third stimulus value signals and the corresponding fourth stimulus value signal, wherein the fourth stimulus value signals comprise a fourth X stimulus value signal, a fourth Y stimulus value signal and a fourth Z stimulus value signal, the fourth X stimulus value signal, the fourth Y stimulus value signal and the fourth Z stimulus value signal are in a functional relationship with the fourth sub-pixel signals respectively, and the fourth stimulus value signals corresponding to the first stimulus value signals are different from each other;
taking the converted first sub-pixel signal, the converted second sub-pixel signal, the converted third sub-pixel signal and the fourth sub-pixel signal as converted pixel signals; the converted pixel signals are used for correspondingly driving a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel in the specific pixel unit.
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