WO2017101534A1 - Colour signal conversion method and device for liquid crystal display screen - Google Patents

Colour signal conversion method and device for liquid crystal display screen Download PDF

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Publication number
WO2017101534A1
WO2017101534A1 PCT/CN2016/098789 CN2016098789W WO2017101534A1 WO 2017101534 A1 WO2017101534 A1 WO 2017101534A1 CN 2016098789 W CN2016098789 W CN 2016098789W WO 2017101534 A1 WO2017101534 A1 WO 2017101534A1
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signal
grayscale value
rgb
rgby
value
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PCT/CN2016/098789
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French (fr)
Chinese (zh)
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宁超
曹谦
苏文华
姚键
潘柏宇
王冀
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合一智能科技（深圳）有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/643—Hue control means, e.g. flesh tone control
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals

Definitions

  • the present invention relates to the field of liquid crystal display, and in particular, to a color signal conversion method and device for a liquid crystal display.
  • the pixels of LCD (English: Liquid Crystal Display, Chinese: LCD panel) and OLED (English: Organic Light-Emitting Diode, Chinese: organic electroluminescent display panel) are generally RGB (red, Green, blue) composed of three sub-pixels, however, there are gradually four panels of RGBY (red, green, blue, yellow) four sub-pixels. Thanks to the Y (yellow) signal, the yellow and gold signals are obtained. Better reproduction, the skin color picture that appears more frequently in the video will be closer to the real world color, and the yellow color of the blue complementary color will be enhanced, and the expression of blue will also be improved.
  • RGB red, Green, blue
  • RGBY red, green, blue, yellow
  • RGB signals transmitted by signal transmission interfaces such as VGA (English: Video Graphics Array), DVI (English: Digital Visual Interface), etc. are all RGB signals.
  • Applying RGB signals directly to an RGBY display can cause image distortion, so it is necessary to convert the RGB signals that are connected to the RGBY display.
  • the color of the converted RGB signal may not be bright enough, and in the case where the input color is yellow, the yellow color of the converted RGBY signal may not be enough. Bright.
  • the technical problem to be solved by the present invention is how to convert the RGB signals so that the color of the converted color signals is more vivid.
  • a color signal conversion method for a liquid crystal display panel including:
  • the grayscale value of the Y signal in the first RGBY signal is a grayscale value of the G signal in the RGB signal
  • the gray scale value of the G signal in the first RGBY signal is a minimum gray scale value
  • the grayscale value of the B signal in the first RGBY signal is a grayscale value of the B signal in the RGB signal
  • a grayscale value of the R signal in the first RGBY signal according to a grayscale value of the R signal in the RGB signal, a grayscale value of the Y signal in the first RGBY signal, a maximum grayscale value, and a predetermined
  • the brightness curve gamma value is determined.
  • the method further includes:
  • the grayscale value of the R signal in the RGB signal is less than or equal to the grayscale value of the G signal, converting the RGB signal into a second RGBY signal and outputting the second RGBY signal,
  • the gray level value of the Y signal in the second RGBY signal is R in the RGB signal
  • the gray level value of the R signal in the second RGBY signal is a minimum gray scale value
  • the grayscale value of the B signal in the second RGBY signal is a grayscale value of the B signal in the RGB signal
  • a grayscale value of the G signal in the second RGBY signal according to a grayscale value of the G signal in the RGB signal, a grayscale value of the Y signal in the second RGBY signal, a maximum grayscale value, and the The predetermined brightness curve gamma value is determined.
  • the first is calculated according to the following formula 1
  • the grayscale value of the R signal in the RGBY signal is calculated according to the following formula 1
  • R 2 is a grayscale value of the R signal in the first RGBY signal
  • N is a maximum grayscale value
  • R 1 is a grayscale value of the R signal in the RGB signal
  • Y 2 is the first The gray scale value of the Y signal in the RGBY signal
  • ⁇ is a predetermined luminance curve gamma value.
  • G 2 is a grayscale value of a G signal in the second RGBY signal
  • N is a maximum grayscale value
  • G 1 is a grayscale value of a G signal in the RGB signal
  • Y 2 is the second The gray scale value of the Y signal in the RGBY signal
  • ⁇ is a predetermined luminance curve gamma value.
  • the method further includes:
  • the RGB signal is converted into a third RGBY signal and the third RGBY signal is output,
  • the converting the RGB signal into a third RGBY signal and outputting the third RGBY signal includes:
  • the O point is determined by reference white point coordinates
  • the D1 point is a point corresponding to the RGB signal in the RGB triangle
  • the D point is an intersection of the ray OD1 and the RGB triangle.
  • the corresponding point D2 of the third RGBY signal in the RGB triangle is obtained according to the following formula 3,
  • OD2 is the length of the line segment OD2
  • OD is the length of the line segment OD
  • S1 is the relative saturation after the lifting.
  • a color signal conversion device for a liquid crystal display panel including:
  • a comparing unit for comparing a magnitude of a grayscale value of the R signal, the G signal, and the B signal in the input RGB signal
  • a conversion output unit connected to the comparison unit, wherein a comparison result of the comparison unit is that a grayscale value of a B signal in the RGB signal is minimum and a grayscale value of the R signal is greater than a grayscale value of the G signal
  • a comparison result of the comparison unit is that a grayscale value of a B signal in the RGB signal is minimum and a grayscale value of the R signal is greater than a grayscale value of the G signal
  • the grayscale value of the Y signal in the first RGBY signal is a grayscale value of the G signal in the RGB signal
  • the gray scale value of the G signal in the first RGBY signal is a minimum gray scale value
  • the grayscale value of the B signal in the first RGBY signal is a grayscale value of the B signal in the RGB signal
  • a grayscale value of the R signal in the first RGBY signal according to a grayscale value of the R signal in the RGB signal, a grayscale value of the Y signal in the first RGBY signal, a maximum grayscale value, and a predetermined
  • the brightness curve gamma value is determined.
  • the conversion output unit is further configured to: when the comparison result of the comparison unit is that the gray level value of the B signal in the RGB signal is the smallest and the R signal is When the grayscale value is less than or equal to the grayscale value of the G signal, converting the RGB signal into a second RGBY signal and outputting the second RGBY signal,
  • the grayscale value of the Y signal in the second RGBY signal is a grayscale value of the R signal in the RGB signal
  • the gray level value of the R signal in the second RGBY signal is a minimum gray scale value
  • the grayscale value of the B signal in the second RGBY signal is a grayscale value of the B signal in the RGB signal
  • a grayscale value of the G signal in the second RGBY signal according to a grayscale value of the G signal in the RGB signal, a grayscale value of the Y signal in the second RGBY signal, a maximum grayscale value, and the The predetermined brightness curve gamma value is determined.
  • the conversion output unit is according to the following formula 1 Calculating a grayscale value of the R signal in the first RGBY signal,
  • R 2 is a grayscale value of the R signal in the first RGBY signal
  • N is a maximum grayscale value
  • R 1 is a grayscale value of the R signal in the RGB signal
  • Y 2 is the first The gray scale value of the Y signal in the RGBY signal
  • ⁇ is a predetermined luminance curve gamma value.
  • the conversion output unit is according to the following formula 2 calculating a gray scale value of the G signal in the second RGBY signal
  • G 2 is a grayscale value of a G signal in the second RGBY signal
  • N is a maximum grayscale value
  • G 1 is a grayscale value of a G signal in the RGB signal
  • Y 2 is the second The gray scale value of the Y signal in the RGBY signal
  • ⁇ is a predetermined luminance curve gamma value.
  • the conversion output unit is further configured to: when the comparison result of the comparison unit is that the gray level value of the B signal in the RGB signal is not the minimum Converting the RGB signal into a third RGBY signal and outputting the third RGBY signal,
  • the converting the RGB signal into a third RGBY signal and outputting the third RGBY signal includes:
  • the O point is determined by reference white point coordinates
  • the D1 point is a point corresponding to the RGB signal in the RGB triangle
  • the D point is an intersection of the ray OD1 and the RGB triangle.
  • the conversion output unit acquires a corresponding point D2 of the third RGBY signal in the RGB triangle according to the following formula 3,
  • OD2 is the length of the line segment OD2
  • OD is the length of the line segment OD
  • S1 is the relative saturation after the lifting.
  • a color signal conversion method and apparatus for a liquid crystal display can convert an original RGB signal into an RGBY signal.
  • an RGBY signal that makes the yellow color more vivid can be output, and when the input color is not yellow, an RGB signal that makes the colors of other colors more vivid can be output.
  • the color signal conversion method and apparatus can make the color of the converted color signal more vivid.
  • FIG. 1 is a flow chart showing a color signal conversion method of a liquid crystal display according to an embodiment of the present invention
  • FIG. 2 is a flow chart showing a color signal conversion method of a liquid crystal display according to another embodiment of the present invention.
  • FIG. 3 illustrates a schematic diagram of determining chromaticity coordinate points of a new RGB signal from chromaticity coordinate points of original RGB signals, in accordance with an embodiment of the present invention
  • Figure 5 shows a schematic diagram of a sinusoidal function as a function of increasing the relative saturation of RGB signals
  • FIG. 6 is a block diagram showing the structure of a color signal conversion device of a liquid crystal display according to an embodiment of the present invention.
  • FIG. 7 is a block diagram showing the structure of a color signal conversion device of a liquid crystal display according to an embodiment of the present invention.
  • the color signal conversion method may mainly include the following steps S100 to S130.
  • Step S100 Compare the magnitudes of the grayscale values of the R signal, the G signal, and the B signal in the input RGB signals.
  • the original RGB signal transmitted in a VGA interface, a DVI interface or the like is first input to the color signal conversion device of the present invention, and then the color signal conversion device compares the R signal and the G signal in the input RGB signal. And the size of the grayscale value of the B signal.
  • the minimum grayscale value of the R signal, the G signal, and the B signal in the RGB signal is 0, and the maximum grayscale value is 255.
  • the grayscale values of the R signal, the G signal, and the B signal are all in the range of 0 to 255.
  • Step S110 Comparing the grayscale values of the R signal and the G signal in the RGB signal in a case where the grayscale value of the B signal in the RGB signal is the smallest;
  • Step S120 In a case where the grayscale value of the R signal in the RGB signal is greater than the grayscale value of the G signal, the RGB signal is converted into the first RGBY signal and the first RGBY signal is output.
  • the grayscale value of the Y signal in the first RGBY signal is a grayscale value of the G signal in the RGB signal, and the grayscale value of the G signal in the first RGBY signal is a minimum grayscale value.
  • a grayscale value of a B signal in the first RGBY signal is a grayscale value of a B signal in the RGB signal, and a grayscale value of an R signal in the first RGBY signal is based on an R in the RGB signal
  • a grayscale value of the signal, a grayscale value of the Y signal in the first RGBY signal, a maximum grayscale value, and a predetermined luminance curve gamma value are determined.
  • the grayscale values of the R signal, the G signal, and the B signal are 150, 100, and 50, respectively, and in the above step S100, it is determined that the gray level of the B signal in the RGB signal is The grayscale value of the value is the smallest. Then, in the above step S110, it is determined that the grayscale value of the R signal is larger than the G signal. At this time, in step S120, the input RGB signal is converted into a first RGBY signal and the first RGBY signal is output.
  • the grayscale value of the Y signal is a grayscale value of the G signal in the input RGB signal, that is, 100, and the grayscale value of the G signal is a minimum grayscale value, that is, 0, B
  • the grayscale value of the signal remains unchanged, that is, still 50.
  • the grayscale value of the R signal can be based on the grayscale value of the R signal in the input RGB signal, the grayscale value of the Y signal in the first RGBY signal, and the maximum value.
  • the gray scale value and the predetermined luminance curve gamma value are determined. In a possible implementation, pre The set luminance curve has a gamma value of 2.2.
  • the color signal conversion device can convert the input original RGB signal into an RGBY signal and output it to the RGBY display screen to display the color corresponding to the converted signal.
  • the original RGB signal can be converted into an RGBY signal.
  • the R signal of the converted RGBY signal can be better reflected, and the yellow color is enhanced, so that the color of the output RGBY signal is more vivid.
  • the color signal conversion method of the embodiment of the present invention may further include step S130.
  • Step S130 In a case where the grayscale value of the R signal in the RGB signal is less than or equal to the grayscale value of the G signal, the RGB signal is converted into the second RGBY signal and the second RGBY is output.
  • the grayscale value of the Y signal in the second RGBY signal is a grayscale value of the R signal in the RGB signal, and the grayscale value of the R signal in the second RGBY signal is a minimum grayscale value, and the second RGBY
  • the grayscale value of the B signal in the signal is a grayscale value of the B signal in the RGB signal
  • the grayscale value of the G signal in the second RGBY signal is based on a grayscale value of the G signal in the RGB signal, the second RGBY
  • the grayscale value of the Y signal in the signal, the maximum grayscale value, and a predetermined luminance curve gamma value are determined.
  • the grayscale values of the R signal, the G signal, and the B signal are 100, 150, and 50, respectively, and in the above step S100, it is determined that the gray scale of the B signal in the RGB signal is The grayscale value of the value is the smallest. Then, in the above step S110, it is determined that the grayscale value of the R signal is smaller than the G signal.
  • the input RGB signal is converted into a second RGBY signal.
  • the grayscale value of the Y signal is a grayscale value of the R signal in the input RGB signal, that is, 100
  • the grayscale value of the R signal is a minimum grayscale value, that is, 0.
  • the grayscale value of the B signal remains unchanged, that is, still 50.
  • the grayscale value of the G signal may be based on the grayscale value of the G signal in the input RGB signal, and the grayscale of the Y signal in the second RGBY signal. Value, maximum grayscale value, and The predetermined brightness curve gamma value is determined.
  • the predetermined luminance curve gamma value is the same as the predetermined luminance curve gamma value in the above embodiment, and is also 2.2.
  • the color signal conversion device can convert the input original RGB signal into an RGBY signal and output it to the RGBY display screen to display the color corresponding to the converted signal.
  • the original RGB signal can be converted into an RGBY signal by the color signal conversion method in the above embodiment. And, by the above-described color signal conversion method, the G signal of the converted RGBY signal can be better reflected, and the yellow color is enhanced, so that the color of the output RGBY signal is more vivid.
  • the color signal conversion method of the embodiment of the present invention in the input RGB signal, when the grayscale value of the B signal is the smallest, it can be determined that the input color is yellow.
  • the magnitudes of the grayscale values of the R signal and the G signal in the RGB signals are compared, and then the R signal or the G signal is better embodied by the step S120 or S130 in the above color signal conversion method. If it is determined that the grayscale value of the R signal is greater than the grayscale value of the G signal, the R signal is better embodied by the above step S120; otherwise, the G signal is better embodied by the above step S130.
  • the color of yellow can be enhanced, so that the color of the RGBY signal is more vivid.
  • the difference between this embodiment and the first embodiment is mainly that, in the above step S120, in the case that the grayscale value of the R signal in the input RGB signal is greater than the grayscale value of the G signal, the following formula 1 may be specifically To calculate the grayscale value of the R signal in the first RGBY signal,
  • R 2 is the gray scale value of the R signal in the first RGBY signal
  • N is the maximum gray scale value, for example, 255
  • R 1 is the gray scale value of the R signal in the input RGB signal
  • Y 2 is the first
  • the original RGB signal can be converted into an RGBY signal.
  • the color of the R signal in the converted RGBY signal is enhanced, that is, the colors of colors other than yellow are enhanced, so that all colors are more vivid and balanced.
  • the calculation may be specifically performed according to the following formula 2
  • the grayscale value of the G signal in the second RGBY signal in a case where the grayscale value of the R signal in the input RGB signal is less than or equal to the grayscale value of the G signal, the calculation may be specifically performed according to the following formula 2
  • the grayscale value of the G signal in the second RGBY signal in a case where the grayscale value of the R signal in the input RGB signal is less than or equal to the grayscale value of the G signal.
  • G 2 is the grayscale value of the G signal in the second RGBY signal
  • N is the maximum grayscale value, for example, 255
  • G 1 is the grayscale value of the G signal in the input RGB signal
  • Y 2 is the first
  • the original RGB signal can be converted into an RGBY signal by the color signal conversion method in the above embodiment.
  • the R signal or the G signal can be better embodied, and the color of the yellow color is enhanced, so that the color of the RGBY signal is more vivid.
  • FIG. 2 is a flow chart showing a color signal conversion method of a liquid crystal display according to another embodiment of the present invention.
  • the steps in FIG. 2 having the same reference numerals as in FIG. 1 have the same functions, and a detailed description of these steps will be omitted for the sake of brevity.
  • the main difference between the color signal conversion method shown in FIG. 2 and the color signal conversion method shown in FIG. 1 is that if the B signal in the input RGB signal is not the smallest, it can be judged as If the color of the input signal is not yellow, it is not necessary to activate the Y pixel.
  • the Y signal can be made the minimum grayscale value, and the color enhancement is performed according to the following step S200 (including steps S2010 to S2030).
  • step S200 in addition to the steps S100 to S130 in the above embodiment, the following step S200 may be further included (including steps S2010 to S2030).
  • Step S200 In a case where the grayscale value of the B signal in the input RGB signal is not the smallest, the input RGB signal is converted into a third RGBY signal and the third RGBY signal is output.
  • the above step S200 may mainly include the following steps:
  • Step S2010 improving the relative saturation of the input RGB signal
  • Step S2020 Acquire a corresponding point D2 in the RGB triangle according to the increased relative saturation of the input RGB signal and the length of the line segment OD in the RGB triangle, wherein, as shown in FIG. 3, the RGB triangle is used for Represents the color gamut range of the LCD, wherein, in the RGB triangle, the O point is determined by the reference white point coordinate, the D1 point is the corresponding point of the input RGB signal in the RGB triangle, and the OD1 is connected, and the OD1 direction extended line segment OD1 is extended. To form the ray OD1, the intersection of the ray OD1 and the RGB triangle is D;
  • Step S2030 outputting a third RGBY signal according to the chromaticity coordinates of D2, wherein the grayscale value of the Y signal in the third RGBY signal is a minimum grayscale value.
  • the input RGB is first determined in the RGB triangle.
  • the signal corresponds to the chromaticity point D1, and increases the relative saturation of the input RGB signal, and then acquires a new chromaticity point D2 according to the relative saturation after the lifting and the length of the line segment OD.
  • the new chromaticity point D2 is the same as the hue H of the original chromaticity point D1, except that the relative saturation of the new chromaticity point D2 with respect to the original chromaticity point D1 is improved.
  • the final output RGBY signal is determined based on the principle that the brightness is closest to the brightness of the original RGB signal.
  • the corresponding point D2 of the third RGBY signal in the RGB triangle may be acquired according to the following formula 3,
  • OD2 is the length of the line segment OD2
  • OD is the length of the line segment OD
  • S1 is the relative saturation after the lifting.
  • FIG. 4 shows a specific example of a color signal conversion method when the input color is not yellow in the embodiment of the present invention.
  • the color signal conversion method may mainly include the following steps.
  • the chromaticity (x, y) and the luminance Y corresponding to the entire color of the LCD display can be calculated.
  • the grayscale value range of the R signal, the G signal, and the B signal in the RGB signal may all be 0 to 255, that is, the minimum grayscale value is 0, and the maximum grayscale value is 255. In other words, for an 8-bit LCD, there are 255 3 RGB combinations and colors.
  • the relative saturation S of the RGB signal of any input can be calculated (step S320 shown in Fig. 4).
  • the color gamut range indicating the LCD can be obtained as shown in FIG. Triangle (hereinafter referred to as RGB triangle).
  • the chromaticity values of the arbitrary RGB combinations can be calculated, and the points corresponding to the chromaticity values in the RGB triangles can be determined based on the calculated chromaticity values of the RGB combinations.
  • the chrominance value can be calculated first, and then the color is determined.
  • the point corresponding to the degree value is D1 as shown in FIG.
  • the OD1 is connected, and the line segment OD1 is extended in the OD1 direction to obtain the ray OD1. Further, a point at which the ray OD1 intersects with the side of the RGB triangle may be set to D.
  • the relative saturation of the signal Since S is in the range of (0, 1) and the sin function changes nonlinearly within (0, pi/2), S1 increases as S increases. In this way, a new relative saturation S1 of the RGB signal can be obtained, and a smooth transition of the RGB signal can be ensured without oversaturation.
  • the sinusoidal function diagram for saturation stretching can be roughly as shown in FIG.
  • the relative saturation of the RGB signals can be appropriately increased.
  • the degree of improvement can be made smaller and smaller. This avoids the occurrence of oversaturation and ribbon or color patches.
  • the above sinusoidal function is taken as an example to illustrate the improvement of the relative saturation of RGB signals.
  • other functions may also be used to enhance the relative saturation of the RGB signal as long as the function satisfies the relative saturation of the RGB signal and the function is in the range of (0, 1). It can be changed linearly inward.
  • the relative saturation S of the RGB signal can also be multiplied by a number greater than one.
  • the length of the line segment OD is used to determine the new chromaticity point D2 after the relative saturation is increased.
  • the length of the line segment OD2 can be determined by using the above formula 3, thereby determining the new chromaticity point D2 after the relative saturation is increased.
  • the new chromaticity point D2 is the same as the hue H of the original chromaticity point D1, except that the saturation is changed, that is, the relative saturation of the new chromaticity point D2 relative to the original chromaticity point D1 is improved. .
  • the present invention has been described with the gray scale value of the RGB signal ranging from 0 to 255. Those skilled in the art can know that the gray scale value range of the RGB signal can be other ranges. Further, in the above embodiment, the present invention has been described with a predetermined luminance curve gamma value of 2.2, and those skilled in the art can know that the predetermined luminance curve gamma value can be other values.
  • FIG. 6 is a block diagram showing the structure of a color signal conversion device of a liquid crystal display according to an embodiment of the present invention.
  • the color signal conversion device 60 may mainly include a comparison unit 61 and a conversion output unit 62.
  • the comparison unit 61 is mainly used to compare the magnitudes of the grayscale values of the R signal, the G signal, and the B signal in the input RGB signals;
  • the conversion output unit 62 is connected to the comparison unit 61, and is mainly used in the comparison unit 61.
  • the RGB signal is converted into the first RGBY signal and the first An RGBY signal, wherein Y in the first RGBY signal a grayscale value of the signal is a grayscale value of the G signal in the RGB signal, a grayscale value of the G signal in the first RGBY signal is a minimum grayscale value, and a B signal in the first RGBY signal
  • the grayscale value is a grayscale value of the B signal in the RGB signal
  • the grayscale value of the R signal in the first RGBY signal is according to a grayscale value of the R signal in the RGB signal, the first RGBY
  • the grayscale value of the Y signal in the signal, the maximum grayscale value, and a predetermined luminance curve gamma value are determined.
  • the conversion output unit 62 is further configured to: when the comparison result of the comparison unit 61 is that the gray level value of the B signal in the RGB signal is the smallest and the gray level value of the R signal is less than or In the case of a grayscale value equal to the G signal, converting the RGB signal into a second RGBY signal and outputting the second RGBY signal, wherein a grayscale value of the Y signal in the second RGBY signal is a grayscale value of the R signal in the RGB signal, a grayscale value of the R signal in the second RGBY signal is a minimum grayscale value, and a grayscale value of the B signal in the second RGBY signal is the RGB signal a grayscale value of the B signal in the second RGBY signal, a grayscale value of the G signal according to the grayscale value of the G signal in the RGB signal, and a grayscale value of the Y signal in the second RGBY signal
  • the value, the maximum grayscale value, and the predetermined luminance curve gamma value are determined.
  • the color signal conversion device of the present embodiment can be used to perform the color signal conversion method of the first embodiment.
  • the specific flow of the color signal conversion method is described in detail in the above embodiment 1.
  • the conversion output unit 62 calculates the first RGBY according to the following formula 1.
  • the grayscale value of the R signal in the signal is greater than the grayscale value of the G signal.
  • R 2 is a grayscale value of the R signal in the first RGBY signal
  • N is a maximum grayscale value
  • R 1 is a grayscale value of the R signal in the RGB signal
  • Y 2 is the first The gray scale value of the Y signal in the RGBY signal
  • ⁇ is a predetermined luminance curve gamma value.
  • the gray level value of the R signal in the RGB signal is less than or In the case of a grayscale value equal to the G signal, the conversion output unit 62 calculates a grayscale value of the G signal in the second RGBY signal according to Equation 2 below,
  • G 2 is a grayscale value of a G signal in the second RGBY signal
  • N is a maximum grayscale value
  • G 1 is a grayscale value of a G signal in the RGB signal
  • Y 2 is the second The gray scale value of the Y signal in the RGBY signal
  • ⁇ is a predetermined luminance curve gamma value.
  • the color signal conversion device of the present embodiment can be used to perform the color signal conversion method of the second embodiment.
  • the conversion output unit 62 is further configured to: when the comparison result of the comparison unit 61 is that the grayscale value of the B signal in the RGB signal is not the smallest, the RGB is Converting a signal into a third RGBY signal and outputting the third RGBY signal, wherein converting the RGB signal into a third RGBY signal and outputting the third RGBY signal comprises: performing relative saturation of the RGB signal Lifting; obtaining a corresponding point D2 of the RGB triangle according to the increased relative saturation of the RGB signal and the length of the line segment OD in the RGB triangle, the RGB triangle being used to represent the color of the liquid crystal display Domain range; and outputting the third RGBY signal according to chromaticity coordinates of D2, wherein a grayscale value of the Y signal in the third RGBY signal is a minimum grayscale value, wherein, among the RGB triangles, The point is determined by reference white point coordinates, the point D1 is the corresponding point of the RGB signal in the RGB triangle, and the point D is the intersection of the ray
  • the conversion output unit 62 acquires a corresponding point D2 of the third RGBY signal in the RGB triangle according to the following formula 3,
  • OD2 is the length of the line segment OD2
  • OD is the length of the line segment OD
  • S1 is the relative saturation after the lifting.
  • the above-mentioned color signal conversion device of the present embodiment can be used to perform the color signal conversion method of the third embodiment.
  • the specific flow of the color signal conversion method is described in detail in the above embodiment 3.
  • a color signal conversion device of a liquid crystal display is capable of converting an original RGB signal into an RGBY signal.
  • an RGBY signal that makes the yellow color more vivid can be output, and when the input color is not yellow, an RGB signal that makes the colors of other colors more vivid can be output.
  • the color signal conversion device can make the color of the converted color signal more vivid.
  • FIG. 7 is a block diagram showing the structure of a color signal conversion device of a liquid crystal display according to an embodiment of the present invention.
  • the color signal conversion device 1100 of the liquid crystal display may be a host server having a computing capability, a personal computer PC, or a portable computer or terminal that can be carried.
  • the specific embodiments of the present invention do not limit the specific implementation of the computing node.
  • the color signal conversion device 1100 of the liquid crystal display includes a processor 1110, a communication interface 1120, a memory 1130, and a bus 1140.
  • the processor 1110, the communication interface 1120, and the memory 1130 complete communication with each other through the bus 1140.
  • Communication interface 1120 is for communicating with network devices, including, for example, a virtual machine management center, shared storage, and the like.
  • the processor 1110 is configured to execute a program.
  • the processor 1110 may be a central processing unit CPU, or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.
  • ASIC Application Specific Integrated Circuit
  • the memory 1130 is used to store files.
  • the memory 1130 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.
  • Memory 1130 can also be a memory array.
  • the memory 1130 may also be partitioned, and the blocks may be combined into a virtual volume according to certain rules.
  • the above program may be program code including computer operating instructions.
  • the program can be specifically used to: perform the operations of the steps in Embodiments 1 to 3.
  • the function is implemented in the form of computer software and sold or used as a stand-alone product, it is considered to some extent that all or part of the technical solution of the present invention (for example, a part contributing to the prior art) is It is embodied in the form of computer software products.
  • the computer software product is typically stored in a computer readable non-volatile storage medium, including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all of the methods of various embodiments of the present invention. Or part of the steps.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

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Abstract

The present invention relates to a colour signal conversion method and device for a liquid crystal display screen. The method comprises: comparing the sizes of grey scale values of an R signal, a G signal and a B signal in an input RGB signal; and where the grey scale value of the B signal in the RGB signal is the minimum and the grey scale value of the R signal is larger than the grey scale value of the G signal, converting the RGB signal into a first RGBY signal, and outputting the first RGBY signal, wherein a grey scale value of a Y signal in the first RGBY signal is the grey scale value of the G signal in the RGB signal, a grey scale value of a G signal in the first RGBY signal is the minimum grey scale value, a grey scale value of a B signal in the first RGBY signal is the grey scale value of the B signal in the RGB signal, and a grey scale value of an R signal in the first RGBY signal is determined according to the grey scale value of the R signal in the RGB signal, the grey scale value of the Y signal in the first RGBY signal, the maximum grey scale value and a pre-set brightness curve gamma value. According to the present invention, the colour of a converted colour signal can be brighter.

Description

液晶显示屏的色彩信号转换方法及装置Color signal conversion method and device for liquid crystal display
交叉引用cross reference
本申请主张2015年12月14日提交的中国专利申请号为201510925030.8的优先权，其全部内容通过引用包含于此。The present application claims priority to Chinese Patent Application No. 20151092503, filed on Dec. 14, 2015, which is hereby incorporated by reference.
技术领域Technical field
本发明涉及液晶显示领域，尤其涉及一种液晶显示屏的色彩信号转换方法及装置。The present invention relates to the field of liquid crystal display, and in particular, to a color signal conversion method and device for a liquid crystal display.
背景技术Background technique
目前主流的显示设备中，LCD(英文：Liquid Crystal Display，中文：液晶显示面板)和OLED(英文：Organic Light-Emitting Diode，中文：有机电致发光显示面板)的像素一般是由RGB(红色、绿色、蓝色)三个子像素构成的，然而目前逐渐出现了RGBY(红色、绿色、蓝色、黄色)四个子像素构成的面板，由于加入了Y(黄色)信号，黄色、金色的信号得到了较好的再现，视频中较常出现的肤色画面也会更加接近真实世界的颜色，同时作为蓝色补色的黄色被增强后，对蓝色的表现力也会起到很好的提升作用。In the current mainstream display devices, the pixels of LCD (English: Liquid Crystal Display, Chinese: LCD panel) and OLED (English: Organic Light-Emitting Diode, Chinese: organic electroluminescent display panel) are generally RGB (red, Green, blue) composed of three sub-pixels, however, there are gradually four panels of RGBY (red, green, blue, yellow) four sub-pixels. Thanks to the Y (yellow) signal, the yellow and gold signals are obtained. Better reproduction, the skin color picture that appears more frequently in the video will be closer to the real world color, and the yellow color of the blue complementary color will be enhanced, and the expression of blue will also be improved.
一般情况下，诸如VGA(英文：Video Graphics Array，中文：视频图形阵列)接口、DVI(英文：Digital Visual Interface，中文：数字视频接口)等的信号传输接口传输的像素信号都是RGB信号，若将RGB信号直接应用于RGBY显示器会导致图像失真，因此需要对接入RGBY显示器的RGB信号进行转换。在传统的RGB信号转换方法中，在输入颜色不是黄色的情况下，转换后的RGB信号的色彩可能不够鲜艳，而在输入颜色为黄色的情况下，转换后的RGBY信号中黄色的色彩可能不够鲜艳。 In general, pixel signals transmitted by signal transmission interfaces such as VGA (English: Video Graphics Array), DVI (English: Digital Visual Interface), etc. are all RGB signals. Applying RGB signals directly to an RGBY display can cause image distortion, so it is necessary to convert the RGB signals that are connected to the RGBY display. In the conventional RGB signal conversion method, when the input color is not yellow, the color of the converted RGB signal may not be bright enough, and in the case where the input color is yellow, the yellow color of the converted RGBY signal may not be enough. Bright.
发明内容Summary of the invention
技术问题technical problem
有鉴于此，本发明要解决的技术问题是，如何对RGB信号进行转换，以使得转换后的色彩信号的颜色更加鲜艳。In view of this, the technical problem to be solved by the present invention is how to convert the RGB signals so that the color of the converted color signals is more vivid.
解决方案solution
为了解决上述技术问题，根据本发明的一个方面，提供了一种液晶显示屏的色彩信号转换方法，包括：In order to solve the above technical problem, according to an aspect of the present invention, a color signal conversion method for a liquid crystal display panel is provided, including:
比较输入的RGB信号中的R信号、G信号和B信号的灰阶值的大小；Comparing the magnitudes of the grayscale values of the R signal, the G signal, and the B signal in the input RGB signal;
在所述RGB信号中的B信号的灰阶值最小的情况下，比较所述RGB信号中的R信号与G信号的灰阶值的大小；Comparing the magnitudes of the grayscale values of the R signal and the G signal in the RGB signal in a case where the grayscale value of the B signal in the RGB signal is the smallest;
在所述RGB信号中的R信号的灰阶值大于G信号的灰阶值的情况下，将所述RGB信号转换成第一RGBY信号并输出所述第一RGBY信号，In a case where the grayscale value of the R signal in the RGB signal is greater than the grayscale value of the G signal, converting the RGB signal into a first RGBY signal and outputting the first RGBY signal,
其中，所述第一RGBY信号中的Y信号的灰阶值为所述RGB信号中的G信号的灰阶值，The grayscale value of the Y signal in the first RGBY signal is a grayscale value of the G signal in the RGB signal,
所述第一RGBY信号中的G信号的灰阶值为最小灰阶值，The gray scale value of the G signal in the first RGBY signal is a minimum gray scale value,
所述第一RGBY信号中的B信号的灰阶值为所述RGB信号中的B信号的灰阶值，The grayscale value of the B signal in the first RGBY signal is a grayscale value of the B signal in the RGB signal,
所述第一RGBY信号中的R信号的灰阶值根据所述RGB信号中的R信号的灰阶值、所述第一RGBY信号中的Y信号的灰阶值、最大灰阶值以及预定的亮度曲线伽马值来确定。a grayscale value of the R signal in the first RGBY signal according to a grayscale value of the R signal in the RGB signal, a grayscale value of the Y signal in the first RGBY signal, a maximum grayscale value, and a predetermined The brightness curve gamma value is determined.
对于上述色彩信号转换方法，在一种可能的实现方式中，还包括：For the above color signal conversion method, in a possible implementation manner, the method further includes:
在所述RGB信号中的R信号的灰阶值小于或等于G信号的灰阶值的情况下，将所述RGB信号转换成第二RGBY信号并输出所述第二RGBY信号，In a case where the grayscale value of the R signal in the RGB signal is less than or equal to the grayscale value of the G signal, converting the RGB signal into a second RGBY signal and outputting the second RGBY signal,
其中，所述第二RGBY信号中的Y信号的灰阶值为所述RGB信号中的R 信号的灰阶值，Wherein the gray level value of the Y signal in the second RGBY signal is R in the RGB signal The grayscale value of the signal,
所述第二RGBY信号中的R信号的灰阶值为最小灰阶值，The gray level value of the R signal in the second RGBY signal is a minimum gray scale value,
所述第二RGBY信号中的B信号的灰阶值为所述RGB信号中的B信号的灰阶值，The grayscale value of the B signal in the second RGBY signal is a grayscale value of the B signal in the RGB signal,
所述第二RGBY信号中的G信号的灰阶值根据所述RGB信号中的G信号的灰阶值、所述第二RGBY信号中的Y信号的灰阶值、最大灰阶值以及所述预定的亮度曲线伽马值来确定。a grayscale value of the G signal in the second RGBY signal according to a grayscale value of the G signal in the RGB signal, a grayscale value of the Y signal in the second RGBY signal, a maximum grayscale value, and the The predetermined brightness curve gamma value is determined.
对于上述色彩信号转换方法，在一种可能的实现方式中，在所述RGB信号中的R信号的灰阶值大于G信号的灰阶值的情况下，根据如下公式1来计算所述第一RGBY信号中的R信号的灰阶值，For the above color signal conversion method, in a possible implementation manner, in a case where the grayscale value of the R signal in the RGB signal is greater than the grayscale value of the G signal, the first is calculated according to the following formula 1 The grayscale value of the R signal in the RGBY signal,
Figure PCTCN2016098789-appb-000001
Figure PCTCN2016098789-appb-000001
其中，R2为所述第一RGBY信号中的R信号的灰阶值，N为最大灰阶值，R1为所述RGB信号中的R信号的灰阶值，Y2为所述第一RGBY信号中的Y信号的灰阶值，γ是预定的亮度曲线伽马值。Wherein R 2 is a grayscale value of the R signal in the first RGBY signal, N is a maximum grayscale value, R 1 is a grayscale value of the R signal in the RGB signal, and Y 2 is the first The gray scale value of the Y signal in the RGBY signal, γ is a predetermined luminance curve gamma value.
对于上述色彩信号转换方法，在一种可能的实现方式中，在所述RGB信号中的R信号的灰阶值小于或等于G信号的灰阶值的情况下，根据如下公式2来计算所述第二RGBY信号中的G信号的灰阶值，For the above color signal conversion method, in a possible implementation manner, in a case where the grayscale value of the R signal in the RGB signal is less than or equal to the grayscale value of the G signal, the calculation is performed according to the following formula 2 The grayscale value of the G signal in the second RGBY signal,
Figure PCTCN2016098789-appb-000002
Figure PCTCN2016098789-appb-000002
其中，G2为所述第二RGBY信号中的G信号的灰阶值，N为最大灰阶值，G1为所述RGB信号中的G信号的灰阶值，Y2为所述第二RGBY信号中的Y信号的灰阶值，γ是预定的亮度曲线伽马值。Wherein G 2 is a grayscale value of a G signal in the second RGBY signal, N is a maximum grayscale value, G 1 is a grayscale value of a G signal in the RGB signal, and Y 2 is the second The gray scale value of the Y signal in the RGBY signal, γ is a predetermined luminance curve gamma value.
对于上述色彩信号转换方法，在一种可能的实现方式中，所述方法还包括： In a possible implementation manner, the method further includes:
在所述RGB信号中的B信号的灰阶值不是最小的情况下，将所述RGB信号转换成第三RGBY信号并输出所述第三RGBY信号，In a case where the grayscale value of the B signal in the RGB signal is not the smallest, the RGB signal is converted into a third RGBY signal and the third RGBY signal is output,
其中，将所述RGB信号转换成第三RGBY信号并输出所述第三RGBY信号，包括：The converting the RGB signal into a third RGBY signal and outputting the third RGBY signal includes:
对所述RGB信号的相对饱和度进行提升；Enhancing the relative saturation of the RGB signals;
根据所述RGB信号的提升后的相对饱和度以及RGB三角形中的线段OD的长度，来获取所述RGB三角形中对应的点D2，所述RGB三角形用于表示所述液晶显示屏的色域范围；以及Obtaining a corresponding point D2 in the RGB triangle according to the improved relative saturation of the RGB signal and the length of the line segment OD in the RGB triangle, the RGB triangle being used to represent the color gamut range of the liquid crystal display ;as well as
根据D2的色度坐标来输出所述第三RGBY信号，其中所述第三RGBY信号中的Y信号的灰阶值为最小灰阶值，Outputting the third RGBY signal according to chromaticity coordinates of D2, wherein a grayscale value of the Y signal in the third RGBY signal is a minimum grayscale value,
其中，在所述RGB三角形中，O点由参考白点坐标确定，D1点为所述RGB信号在所述RGB三角形中对应的点，D点为射线OD1与所述RGB三角形的交点。Wherein, in the RGB triangle, the O point is determined by reference white point coordinates, the D1 point is a point corresponding to the RGB signal in the RGB triangle, and the D point is an intersection of the ray OD1 and the RGB triangle.
对于上述色彩信号转换方法，在一种可能的实现方式中，根据如下公式3来获取所述第三RGBY信号在所述RGB三角形中对应的点D2，For the color signal conversion method described above, in a possible implementation, the corresponding point D2 of the third RGBY signal in the RGB triangle is obtained according to the following formula 3,
OD2＝OD*S1       式3OD2=OD*S1 Equation 3
其中，OD2为线段OD2的长度，OD为线段OD的长度，S1为提升后的相对饱和度。Where OD2 is the length of the line segment OD2, OD is the length of the line segment OD, and S1 is the relative saturation after the lifting.
为了解决上述技术问题，根据本发明的另一方面，提供了一种液晶显示屏的色彩信号转换装置，包括：In order to solve the above technical problem, according to another aspect of the present invention, a color signal conversion device for a liquid crystal display panel is provided, including:
比较单元，用于比较输入的RGB信号中的R信号、G信号和B信号的灰阶值的大小；以及a comparing unit for comparing a magnitude of a grayscale value of the R signal, the G signal, and the B signal in the input RGB signal;
转换输出单元，与所述比较单元连接，用于在所述比较单元的比较结果为所述RGB信号中的B信号的灰阶值最小并且R信号的灰阶值大于G信号的灰阶值的情况下，将所述RGB信号转换成第一RGBY信号并输出所述第一 RGBY信号，And a conversion output unit, connected to the comparison unit, wherein a comparison result of the comparison unit is that a grayscale value of a B signal in the RGB signal is minimum and a grayscale value of the R signal is greater than a grayscale value of the G signal In the case, converting the RGB signal into a first RGBY signal and outputting the first RGBY signal,
其中，所述第一RGBY信号中的Y信号的灰阶值为所述RGB信号中的G信号的灰阶值，The grayscale value of the Y signal in the first RGBY signal is a grayscale value of the G signal in the RGB signal,
所述第一RGBY信号中的G信号的灰阶值为最小灰阶值，The gray scale value of the G signal in the first RGBY signal is a minimum gray scale value,
所述第一RGBY信号中的B信号的灰阶值为所述RGB信号中的B信号的灰阶值，The grayscale value of the B signal in the first RGBY signal is a grayscale value of the B signal in the RGB signal,
所述第一RGBY信号中的R信号的灰阶值根据所述RGB信号中的R信号的灰阶值、所述第一RGBY信号中的Y信号的灰阶值、最大灰阶值以及预定的亮度曲线伽马值来确定。a grayscale value of the R signal in the first RGBY signal according to a grayscale value of the R signal in the RGB signal, a grayscale value of the Y signal in the first RGBY signal, a maximum grayscale value, and a predetermined The brightness curve gamma value is determined.
对于上述色彩信号转换装置，在一种可能的实现方式中，所述转换输出单元还用于在所述比较单元的比较结果为所述RGB信号中的B信号的灰阶值最小并且R信号的灰阶值小于或等于G信号的灰阶值的情况下，将所述RGB信号转换成第二RGBY信号并输出所述第二RGBY信号，In a possible implementation manner, the conversion output unit is further configured to: when the comparison result of the comparison unit is that the gray level value of the B signal in the RGB signal is the smallest and the R signal is When the grayscale value is less than or equal to the grayscale value of the G signal, converting the RGB signal into a second RGBY signal and outputting the second RGBY signal,
其中，所述第二RGBY信号中的Y信号的灰阶值为所述RGB信号中的R信号的灰阶值，The grayscale value of the Y signal in the second RGBY signal is a grayscale value of the R signal in the RGB signal,
所述第二RGBY信号中的R信号的灰阶值为最小灰阶值，The gray level value of the R signal in the second RGBY signal is a minimum gray scale value,
所述第二RGBY信号中的B信号的灰阶值为所述RGB信号中的B信号的灰阶值，The grayscale value of the B signal in the second RGBY signal is a grayscale value of the B signal in the RGB signal,
所述第二RGBY信号中的G信号的灰阶值根据所述RGB信号中的G信号的灰阶值、所述第二RGBY信号中的Y信号的灰阶值、最大灰阶值以及所述预定的亮度曲线伽马值来确定。a grayscale value of the G signal in the second RGBY signal according to a grayscale value of the G signal in the RGB signal, a grayscale value of the Y signal in the second RGBY signal, a maximum grayscale value, and the The predetermined brightness curve gamma value is determined.
对于上述色彩信号转换装置，在一种可能的实现方式中，在所述RGB信号中的R信号的灰阶值大于G信号的灰阶值的情况下，所述转换输出单元根据如下公式1来计算所述第一RGBY信号中的R信号的灰阶值， For the above color signal conversion device, in a possible implementation manner, in a case where the grayscale value of the R signal in the RGB signal is greater than the grayscale value of the G signal, the conversion output unit is according to the following formula 1 Calculating a grayscale value of the R signal in the first RGBY signal,
Figure PCTCN2016098789-appb-000003
Figure PCTCN2016098789-appb-000003
其中，R2为所述第一RGBY信号中的R信号的灰阶值，N为最大灰阶值，R1为所述RGB信号中的R信号的灰阶值，Y2为所述第一RGBY信号中的Y信号的灰阶值，γ是预定的亮度曲线伽马值。Wherein R 2 is a grayscale value of the R signal in the first RGBY signal, N is a maximum grayscale value, R 1 is a grayscale value of the R signal in the RGB signal, and Y 2 is the first The gray scale value of the Y signal in the RGBY signal, γ is a predetermined luminance curve gamma value.
对于上述色彩信号转换装置，在一种可能的实现方式中，在所述RGB信号中的R信号的灰阶值小于或等于G信号的灰阶值的情况下，所述转换输出单元根据如下公式2来计算所述第二RGBY信号中的G信号的灰阶值，For the above color signal conversion device, in a possible implementation manner, in a case where the grayscale value of the R signal in the RGB signal is less than or equal to the grayscale value of the G signal, the conversion output unit is according to the following formula 2 calculating a gray scale value of the G signal in the second RGBY signal,
Figure PCTCN2016098789-appb-000004
Figure PCTCN2016098789-appb-000004
其中，G2为所述第二RGBY信号中的G信号的灰阶值，N为最大灰阶值，G1为所述RGB信号中的G信号的灰阶值，Y2为所述第二RGBY信号中的Y信号的灰阶值，γ是预定的亮度曲线伽马值。Wherein G 2 is a grayscale value of a G signal in the second RGBY signal, N is a maximum grayscale value, G 1 is a grayscale value of a G signal in the RGB signal, and Y 2 is the second The gray scale value of the Y signal in the RGBY signal, γ is a predetermined luminance curve gamma value.
对于上述色彩信号转换装置，在一种可能的实现方式中，所述转换输出单元还用于在所述比较单元的比较结果为所述RGB信号中的B信号的灰阶值不是最小的情况下，将所述RGB信号转换成第三RGBY信号并输出所述第三RGBY信号，In a possible implementation manner, the conversion output unit is further configured to: when the comparison result of the comparison unit is that the gray level value of the B signal in the RGB signal is not the minimum Converting the RGB signal into a third RGBY signal and outputting the third RGBY signal,
其中，将所述RGB信号转换成第三RGBY信号并输出所述第三RGBY信号，包括：The converting the RGB signal into a third RGBY signal and outputting the third RGBY signal includes:
对所述RGB信号的相对饱和度进行提升；Enhancing the relative saturation of the RGB signals;
根据所述RGB信号的提升后的相对饱和度以及RGB三角形中的线段OD的长度，来获取所述RGB三角形中对应的点D2，所述RGB三角形用于表示所述液晶显示屏的色域范围；以及Obtaining a corresponding point D2 in the RGB triangle according to the improved relative saturation of the RGB signal and the length of the line segment OD in the RGB triangle, the RGB triangle being used to represent the color gamut range of the liquid crystal display ;as well as
根据D2的色度坐标来输出所述第三RGBY信号，其中所述第三RGBY信号中的Y信号的灰阶值为最小灰阶值， Outputting the third RGBY signal according to chromaticity coordinates of D2, wherein a grayscale value of the Y signal in the third RGBY signal is a minimum grayscale value,
其中，在所述RGB三角形中，O点由参考白点坐标确定，D1点为所述RGB信号在所述RGB三角形中对应的点，D点为射线OD1与所述RGB三角形的交点。Wherein, in the RGB triangle, the O point is determined by reference white point coordinates, the D1 point is a point corresponding to the RGB signal in the RGB triangle, and the D point is an intersection of the ray OD1 and the RGB triangle.
对于上述色彩信号转换装置，在一种可能的实现方式中，所述转换输出单元根据如下公式3来获取所述第三RGBY信号在所述RGB三角形中对应的点D2，In a possible implementation manner, the conversion output unit acquires a corresponding point D2 of the third RGBY signal in the RGB triangle according to the following formula 3,
OD2＝OD*S1         式3OD2=OD*S1 Equation 3
其中，OD2为线段OD2的长度，OD为线段OD的长度，S1为提升后的相对饱和度。Where OD2 is the length of the line segment OD2, OD is the length of the line segment OD, and S1 is the relative saturation after the lifting.
有益效果Beneficial effect
根据本发明实施例的液晶显示屏的色彩信号转换方法及装置，能够将原始的RGB信号转换成RGBY信号。在所输入的颜色为黄色的情况下，能够输出使黄色的色彩更加鲜艳的RGBY信号，在所输入的颜色不是黄色的情况下，能够输出使其它颜色的色彩更加鲜艳的RGB信号。这样，根据本发明实施例的色彩信号转换方法及装置，能够使得转换后的色彩信号的颜色更加鲜艳。A color signal conversion method and apparatus for a liquid crystal display according to an embodiment of the present invention can convert an original RGB signal into an RGBY signal. When the input color is yellow, an RGBY signal that makes the yellow color more vivid can be output, and when the input color is not yellow, an RGB signal that makes the colors of other colors more vivid can be output. Thus, the color signal conversion method and apparatus according to the embodiment of the present invention can make the color of the converted color signal more vivid.
根据下面参考附图对示例性实施例的详细说明，本发明的其它特征及方面将变得清楚。Further features and aspects of the present invention will become apparent from the Detailed Description of the Drawing.
附图说明DRAWINGS
包含在说明书中并且构成说明书的一部分的附图与说明书一起示出了本发明的示例性实施例、特征和方面，并且用于解释本发明的原理。The accompanying drawings, which are incorporated in FIG
图1示出根据本发明一实施例的液晶显示屏的色彩信号转换方法的流程图；1 is a flow chart showing a color signal conversion method of a liquid crystal display according to an embodiment of the present invention;
图2示出根据本发明另一实施例的液晶显示屏的色彩信号转换方法的流程图； 2 is a flow chart showing a color signal conversion method of a liquid crystal display according to another embodiment of the present invention;
图3示出根据本发明一实施例由原始RGB信号的色度坐标点确定新的RGB信号的色度坐标点的示意图；3 illustrates a schematic diagram of determining chromaticity coordinate points of a new RGB signal from chromaticity coordinate points of original RGB signals, in accordance with an embodiment of the present invention;
图4示出本发明实施例中输入颜色不是黄色时的色彩信号转换方法的具体示例；4 shows a specific example of a color signal conversion method when the input color is not yellow in the embodiment of the present invention;
图5示出作为提升RGB信号的相对饱和度的函数的正弦函数的示意图；Figure 5 shows a schematic diagram of a sinusoidal function as a function of increasing the relative saturation of RGB signals;
图6示出根据本发明一实施例的液晶显示屏的色彩信号转换装置的结构框图；6 is a block diagram showing the structure of a color signal conversion device of a liquid crystal display according to an embodiment of the present invention;
图7示出根据本发明一实施例的液晶显示屏的色彩信号转换装置的结构框图。FIG. 7 is a block diagram showing the structure of a color signal conversion device of a liquid crystal display according to an embodiment of the present invention.
具体实施方式Detailed ways
以下将参考附图详细说明本发明的各种示例性实施例、特征和方面。附图中相同的附图标记表示功能相同或相似的元件。尽管在附图中示出了实施例的各种方面，但是除非特别指出，不必按比例绘制附图。Various exemplary embodiments, features, and aspects of the invention are described in detail below with reference to the drawings. The same reference numerals in the drawings denote the same or similar elements. Although the various aspects of the embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.
在这里专用的词“示例性”意为“用作例子、实施例或说明性”。这里作为“示例性”所说明的任何实施例不必解释为优于或好于其它实施例。The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustrative." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or preferred.
另外，为了更好的说明本发明，在下文的具体实施方式中给出了众多的具体细节。本领域技术人员应当理解，没有某些具体细节，本发明同样可以实施。在一些实例中，对于本领域技术人员熟知的方法、手段、元件和电路未作详细描述，以便于凸显本发明的主旨。In addition, numerous specific details are set forth in the Detailed Description of the invention in the Detailed Description. Those skilled in the art will appreciate that the invention may be practiced without some specific details. In some instances, methods, means, components, and circuits that are well known to those skilled in the art are not described in detail in order to facilitate the invention.
实施例1Example 1
图1示出根据本发明一实施例的液晶显示屏的色彩信号转换方法的流程图。如图1所示，该色彩信号转换方法主要可以包括以下步骤S100～S130。1 is a flow chart showing a color signal conversion method of a liquid crystal display according to an embodiment of the present invention. As shown in FIG. 1 , the color signal conversion method may mainly include the following steps S100 to S130.
步骤S100、比较输入的RGB信号中的R信号、G信号和B信号的灰阶值的大小。 Step S100: Compare the magnitudes of the grayscale values of the R signal, the G signal, and the B signal in the input RGB signals.
具体而言，首先将在诸如VGA接口、DVI接口等中传输的原始的RGB信号输入至本发明的色彩信号转换装置，然后色彩信号转换装置再比较所输入的RGB信号中的R信号、G信号和B信号的灰阶值的大小。其中，在一种可能的实现方式中，RGB信号中的R信号、G信号和B信号的最小灰阶值为0，最大灰阶值为255。换句话说，R信号、G信号和B信号的灰阶值均在0～255的范围内。Specifically, the original RGB signal transmitted in a VGA interface, a DVI interface or the like is first input to the color signal conversion device of the present invention, and then the color signal conversion device compares the R signal and the G signal in the input RGB signal. And the size of the grayscale value of the B signal. Wherein, in a possible implementation manner, the minimum grayscale value of the R signal, the G signal, and the B signal in the RGB signal is 0, and the maximum grayscale value is 255. In other words, the grayscale values of the R signal, the G signal, and the B signal are all in the range of 0 to 255.
步骤S110、在RGB信号中的B信号的灰阶值最小的情况下，比较RGB信号中的R信号与G信号的灰阶值的大小；Step S110: Comparing the grayscale values of the R signal and the G signal in the RGB signal in a case where the grayscale value of the B signal in the RGB signal is the smallest;
步骤S120、在RGB信号中的R信号的灰阶值大于G信号的灰阶值的情况下，将RGB信号转换成第一RGBY信号并输出该第一RGBY信号。Step S120: In a case where the grayscale value of the R signal in the RGB signal is greater than the grayscale value of the G signal, the RGB signal is converted into the first RGBY signal and the first RGBY signal is output.
其中，所述第一RGBY信号中的Y信号的灰阶值为所述RGB信号中的G信号的灰阶值，所述第一RGBY信号中的G信号的灰阶值为最小灰阶值，所述第一RGBY信号中的B信号的灰阶值为所述RGB信号中的B信号的灰阶值，所述第一RGBY信号中的R信号的灰阶值根据所述RGB信号中的R信号的灰阶值、所述第一RGBY信号中的Y信号的灰阶值、最大灰阶值以及预定的亮度曲线伽马值来确定。The grayscale value of the Y signal in the first RGBY signal is a grayscale value of the G signal in the RGB signal, and the grayscale value of the G signal in the first RGBY signal is a minimum grayscale value. a grayscale value of a B signal in the first RGBY signal is a grayscale value of a B signal in the RGB signal, and a grayscale value of an R signal in the first RGBY signal is based on an R in the RGB signal A grayscale value of the signal, a grayscale value of the Y signal in the first RGBY signal, a maximum grayscale value, and a predetermined luminance curve gamma value are determined.
举例而言，在所输入的RGB信号中，R信号、G信号、B信号的灰阶值分别为150、100、50，则在上述步骤S100中，判断为RGB信号中的B信号的灰阶值的灰阶值最小。然后，在上述步骤S110中，判断为R信号的灰阶值大于G信号。这时，在步骤S120中，将所输入的RGB信号转换成第一RGBY信号并输出该第一RGBY信号。其中，在该RGBY信号中，Y信号的灰阶值为所输入的RGB信号中的G信号的灰阶值、即为100，G信号的灰阶值为最小灰阶值、即为0，B信号的灰阶值保持不变、即仍为50，R信号的灰阶值可以根据所输入的RGB信号中的R信号的灰阶值、第一RGBY信号中的Y信号的灰阶值、最大灰阶值以及预定的亮度曲线伽马值来确定。在一种可能的实现方式中，预 定的亮度曲线伽马值为2.2。For example, in the input RGB signal, the grayscale values of the R signal, the G signal, and the B signal are 150, 100, and 50, respectively, and in the above step S100, it is determined that the gray level of the B signal in the RGB signal is The grayscale value of the value is the smallest. Then, in the above step S110, it is determined that the grayscale value of the R signal is larger than the G signal. At this time, in step S120, the input RGB signal is converted into a first RGBY signal and the first RGBY signal is output. Wherein, in the RGBY signal, the grayscale value of the Y signal is a grayscale value of the G signal in the input RGB signal, that is, 100, and the grayscale value of the G signal is a minimum grayscale value, that is, 0, B The grayscale value of the signal remains unchanged, that is, still 50. The grayscale value of the R signal can be based on the grayscale value of the R signal in the input RGB signal, the grayscale value of the Y signal in the first RGBY signal, and the maximum value. The gray scale value and the predetermined luminance curve gamma value are determined. In a possible implementation, pre The set luminance curve has a gamma value of 2.2.
这样，通过上述步骤S120，色彩信号转换装置就可以将输入的原始RGB信号转换成RGBY信号并输出至RGBY显示屏，以显示与转换后的信号对应的颜色。Thus, through the above step S120, the color signal conversion device can convert the input original RGB signal into an RGBY signal and output it to the RGBY display screen to display the color corresponding to the converted signal.
通过本发明实施例的上述色彩信号转换方法，能够将原始的RGB信号转换成RGBY信号。并且，通过上述色彩信号转换方法，所转换出的RGBY信号中R信号能够被更好地体现，并且黄色的色彩被增强，从而使得输出的RGBY信号的色彩更加鲜艳。With the above color signal conversion method of the embodiment of the present invention, the original RGB signal can be converted into an RGBY signal. Also, by the above-described color signal conversion method, the R signal of the converted RGBY signal can be better reflected, and the yellow color is enhanced, so that the color of the output RGBY signal is more vivid.
在一种可能的实现方式中，本发明实施例的色彩信号转换方法还可以包括步骤S130。In a possible implementation manner, the color signal conversion method of the embodiment of the present invention may further include step S130.
步骤S130、在RGB信号中的R信号的灰阶值小于或等于G信号的灰阶值的情况下，将RGB信号转换成第二RGBY信号并输出该第二RGBY。Step S130: In a case where the grayscale value of the R signal in the RGB signal is less than or equal to the grayscale value of the G signal, the RGB signal is converted into the second RGBY signal and the second RGBY is output.
其中，该第二RGBY信号中的Y信号的灰阶值为RGB信号中的R信号的灰阶值，该第二RGBY信号中的R信号的灰阶值为最小灰阶值，该第二RGBY信号中的B信号的灰阶值为RGB信号中的B信号的灰阶值，该第二RGBY信号中的G信号的灰阶值根据RGB信号中的G信号的灰阶值、该第二RGBY信号中的Y信号的灰阶值、最大灰阶值以及预定的亮度曲线伽马值来确定。The grayscale value of the Y signal in the second RGBY signal is a grayscale value of the R signal in the RGB signal, and the grayscale value of the R signal in the second RGBY signal is a minimum grayscale value, and the second RGBY The grayscale value of the B signal in the signal is a grayscale value of the B signal in the RGB signal, and the grayscale value of the G signal in the second RGBY signal is based on a grayscale value of the G signal in the RGB signal, the second RGBY The grayscale value of the Y signal in the signal, the maximum grayscale value, and a predetermined luminance curve gamma value are determined.
举例而言，在所输入的RGB信号中，R信号、G信号、B信号的灰阶值分别为100、150、50，则在上述步骤S100中，判断为RGB信号中的B信号的灰阶值的灰阶值最小。然后，在上述步骤S110中，判断为R信号的灰阶值小于G信号。这时，在步骤S130中，将所输入的RGB信号转换成第二RGBY信号。其中，在该第二RGBY信号中，Y信号的灰阶值为所输入的RGB信号中的R信号的灰阶值、即为100，R信号的灰阶值为最小灰阶值、即为0，B信号的灰阶值保持不变，即仍为50，G信号的灰阶值可以根据所输入的RGB信号中的G信号的灰阶值、该第二RGBY信号中的Y信号的灰阶值、最大灰阶值以及 预定的亮度曲线伽马值来确定。在一种可能的实现方式中，该预定的亮度曲线伽马值与上述实施方式中预定的亮度曲线伽马值相同，也为2.2。For example, in the input RGB signal, the grayscale values of the R signal, the G signal, and the B signal are 100, 150, and 50, respectively, and in the above step S100, it is determined that the gray scale of the B signal in the RGB signal is The grayscale value of the value is the smallest. Then, in the above step S110, it is determined that the grayscale value of the R signal is smaller than the G signal. At this time, in step S130, the input RGB signal is converted into a second RGBY signal. Wherein, in the second RGBY signal, the grayscale value of the Y signal is a grayscale value of the R signal in the input RGB signal, that is, 100, and the grayscale value of the R signal is a minimum grayscale value, that is, 0. The grayscale value of the B signal remains unchanged, that is, still 50. The grayscale value of the G signal may be based on the grayscale value of the G signal in the input RGB signal, and the grayscale of the Y signal in the second RGBY signal. Value, maximum grayscale value, and The predetermined brightness curve gamma value is determined. In a possible implementation manner, the predetermined luminance curve gamma value is the same as the predetermined luminance curve gamma value in the above embodiment, and is also 2.2.
这样，通过上述步骤S130，色彩信号转换装置就可以将输入的原始RGB信号转换成RGBY信号并输出至RGBY显示屏，以显示与转换后的信号对应的颜色。Thus, through the above step S130, the color signal conversion device can convert the input original RGB signal into an RGBY signal and output it to the RGBY display screen to display the color corresponding to the converted signal.
通过上述实施方式中的色彩信号转换方法，能够将原始的RGB信号转换成RGBY信号。并且，通过上述色彩信号转换方法，所转换出的RGBY信号中G信号能够被更好地体现，并且黄色的色彩被增强，从而使得输出的RGBY信号的色彩更加鲜艳。The original RGB signal can be converted into an RGBY signal by the color signal conversion method in the above embodiment. And, by the above-described color signal conversion method, the G signal of the converted RGBY signal can be better reflected, and the yellow color is enhanced, so that the color of the output RGBY signal is more vivid.
通过本发明实施例的上述色彩信号转换方法，在所输入的RGB信号中，在B信号的灰阶值最小的情况下，可以判断为所输入的颜色为黄色。在这种情况下，再比较RGB信号中的R信号和G信号的灰阶值的大小，然后利用上述色彩信号转换方法中的步骤S120或S130来更好地体现R信号或G信号。如果判断为R信号的灰阶值大于G信号的灰阶值，则通过上述步骤S120来更好地体现R信号；否则，通过上述步骤S130来更好地体现G信号。通过上述色彩信号转换方法，能够使黄色的色彩被增强，从而使得RGBY信号的色彩更加鲜艳。According to the color signal conversion method of the embodiment of the present invention, in the input RGB signal, when the grayscale value of the B signal is the smallest, it can be determined that the input color is yellow. In this case, the magnitudes of the grayscale values of the R signal and the G signal in the RGB signals are compared, and then the R signal or the G signal is better embodied by the step S120 or S130 in the above color signal conversion method. If it is determined that the grayscale value of the R signal is greater than the grayscale value of the G signal, the R signal is better embodied by the above step S120; otherwise, the G signal is better embodied by the above step S130. By the above color signal conversion method, the color of yellow can be enhanced, so that the color of the RGBY signal is more vivid.
实施例2Example 2
本实施例与上述实施例1的区别主要在于，在上述步骤S120中，在所输入的RGB信号中的R信号的灰阶值大于G信号的灰阶值的情况下，可以具体根据如下公式1来计算第一RGBY信号中的R信号的灰阶值，The difference between this embodiment and the first embodiment is mainly that, in the above step S120, in the case that the grayscale value of the R signal in the input RGB signal is greater than the grayscale value of the G signal, the following formula 1 may be specifically To calculate the grayscale value of the R signal in the first RGBY signal,
Figure PCTCN2016098789-appb-000005
Figure PCTCN2016098789-appb-000005
其中，R2为第一RGBY信号中的R信号的灰阶值，N为最大灰阶值、例如为255，R1为所输入的RGB信号中的R信号的灰阶值，Y2为第一RGBY信号中 的Y信号的灰阶值，γ是预定的亮度曲线伽马值、例如γ＝2.2。Where R 2 is the gray scale value of the R signal in the first RGBY signal, N is the maximum gray scale value, for example, 255, R 1 is the gray scale value of the R signal in the input RGB signal, and Y 2 is the first The gray scale value of the Y signal in an RGBY signal, γ is a predetermined luminance curve gamma value, for example, γ=2.2.
通过本发明实施例的上述色彩信号转换方法，能够将原始的RGB信号转换成RGBY信号。并且，通过上述色彩信号转换方法，所转换出的RGBY信号中R信号的色彩被增强，即除黄色以外的其它颜色的色彩被增强，从而使得全部颜色更加鲜艳、均衡。With the above color signal conversion method of the embodiment of the present invention, the original RGB signal can be converted into an RGBY signal. Moreover, by the color signal conversion method described above, the color of the R signal in the converted RGBY signal is enhanced, that is, the colors of colors other than yellow are enhanced, so that all colors are more vivid and balanced.
在一种可能的实现方式中，在上述步骤S140中，在所输入的RGB信号中的R信号的灰阶值小于或等于G信号的灰阶值的情况下，可以具体根据如下公式2来计算第二RGBY信号中的G信号的灰阶值，In a possible implementation manner, in the foregoing step S140, in a case where the grayscale value of the R signal in the input RGB signal is less than or equal to the grayscale value of the G signal, the calculation may be specifically performed according to the following formula 2 The grayscale value of the G signal in the second RGBY signal,
Figure PCTCN2016098789-appb-000006
Figure PCTCN2016098789-appb-000006
其中，G2为第二RGBY信号中的G信号的灰阶值，N为最大灰阶值、例如为255，G1为所输入的RGB信号中的G信号的灰阶值，Y2为第二RGBY信号中的Y信号的灰阶值，γ是预定的亮度曲线伽马值、例如为γ＝2.2。Where G 2 is the grayscale value of the G signal in the second RGBY signal, N is the maximum grayscale value, for example, 255, G 1 is the grayscale value of the G signal in the input RGB signal, and Y 2 is the first The gray scale value of the Y signal in the two RGBY signals, γ is a predetermined luminance curve gamma value, for example, γ=2.2.
通过上述实施方式中的色彩信号转换方法，能够将原始的RGB信号转换成RGBY信号。并且，能够更好地体现R信号或G信号，并使黄色的色彩被增强，从而使得RGBY信号的色彩更加鲜艳。The original RGB signal can be converted into an RGBY signal by the color signal conversion method in the above embodiment. Moreover, the R signal or the G signal can be better embodied, and the color of the yellow color is enhanced, so that the color of the RGBY signal is more vivid.
实施例3Example 3
图2示出根据本发明另一实施例的液晶显示屏的色彩信号转换方法的流程图。图2中标号与图1相同的步骤具有相同的功能，为简明起见，省略对这些步骤的详细说明。2 is a flow chart showing a color signal conversion method of a liquid crystal display according to another embodiment of the present invention. The steps in FIG. 2 having the same reference numerals as in FIG. 1 have the same functions, and a detailed description of these steps will be omitted for the sake of brevity.
如图2所示，图2所示的色彩信号转换方法与图1所示色彩信号转换方法的主要区别在于，如果所输入的RGB信号中的B信号不是最小的情况下，则可以判断为所输入的信号的颜色不是黄色，则不需要启动Y像素，此时可以使Y信号为最小灰阶值，并根据以下的步骤S200(包括步骤S2010～S2030)来进行色彩增强。 As shown in FIG. 2, the main difference between the color signal conversion method shown in FIG. 2 and the color signal conversion method shown in FIG. 1 is that if the B signal in the input RGB signal is not the smallest, it can be judged as If the color of the input signal is not yellow, it is not necessary to activate the Y pixel. In this case, the Y signal can be made the minimum grayscale value, and the color enhancement is performed according to the following step S200 (including steps S2010 to S2030).
换句话说，在本发明实施例的色彩信号转换方法中，除了上述实施例中的步骤S100～S130以外，主要还可以包括以下步骤S200(包括步骤S2010～S2030)。In other words, in the color signal conversion method of the embodiment of the present invention, in addition to the steps S100 to S130 in the above embodiment, the following step S200 may be further included (including steps S2010 to S2030).
步骤S200、在所输入的RGB信号中的B信号的灰阶值不是最小的情况下，将所输入的RGB信号转换成第三RGBY信号并输出该第三RGBY信号。Step S200: In a case where the grayscale value of the B signal in the input RGB signal is not the smallest, the input RGB signal is converted into a third RGBY signal and the third RGBY signal is output.
其中，上述步骤S200主要可以包括以下步骤：The above step S200 may mainly include the following steps:
步骤S2010、对所输入的RGB信号的相对饱和度进行提升；Step S2010, improving the relative saturation of the input RGB signal;
步骤S2020、根据所输入的RGB信号的提升后的相对饱和度以及RGB三角形中的线段OD的长度，来获取该RGB三角形中对应的点D2，其中，如图3所示，该RGB三角形用于表示LCD的色域范围，其中，在RGB三角形中，O点由参考白点坐标确定，D1点为所输入的RGB信号在RGB三角形中对应的点，并且连接OD1，并延OD1方向延长线段OD1以形成射线OD1，射线OD1与RGB三角形的交点为D；以及Step S2020: Acquire a corresponding point D2 in the RGB triangle according to the increased relative saturation of the input RGB signal and the length of the line segment OD in the RGB triangle, wherein, as shown in FIG. 3, the RGB triangle is used for Represents the color gamut range of the LCD, wherein, in the RGB triangle, the O point is determined by the reference white point coordinate, the D1 point is the corresponding point of the input RGB signal in the RGB triangle, and the OD1 is connected, and the OD1 direction extended line segment OD1 is extended. To form the ray OD1, the intersection of the ray OD1 and the RGB triangle is D;
步骤S2030、根据D2的色度坐标来输出第三RGBY信号，其中第三RGBY信号中的Y信号的灰阶值为最小灰阶值。Step S2030, outputting a third RGBY signal according to the chromaticity coordinates of D2, wherein the grayscale value of the Y signal in the third RGBY signal is a minimum grayscale value.
通过本实施例的上述色彩信号转换方法，在所输入的RGB信号中的B信号的灰阶值不是最小、即所输入的颜色不是黄色的情况下，首先在RGB三角形中确定与所输入的RGB信号相对应的色度点D1，并提升所输入的RGB信号的相对饱和度，然后根据提升后的相对饱和度以及线段OD的长度获取新的色度点D2。这样，新的色度点D2和原始色度点D1的色调H相同，只是新的色度点D2相对于原始色度点D1的相对饱和度有所提升。然后，根据新的色度点D2来找出某些RGB组合，使得它们的色度坐标在RGB三角形中为D2点。最后，根据亮度最接近原始RGB信号的亮度的原则，确定最终输出的RGBY信号。With the above color signal conversion method of the present embodiment, in a case where the grayscale value of the B signal in the input RGB signal is not the smallest, that is, the input color is not yellow, the input RGB is first determined in the RGB triangle. The signal corresponds to the chromaticity point D1, and increases the relative saturation of the input RGB signal, and then acquires a new chromaticity point D2 according to the relative saturation after the lifting and the length of the line segment OD. Thus, the new chromaticity point D2 is the same as the hue H of the original chromaticity point D1, except that the relative saturation of the new chromaticity point D2 with respect to the original chromaticity point D1 is improved. Then, some RGB combinations are found based on the new chrominance point D2 such that their chromaticity coordinates are D2 points in the RGB triangle. Finally, the final output RGBY signal is determined based on the principle that the brightness is closest to the brightness of the original RGB signal.
通过上述色彩信号转换方法，能够使得在所输入的颜色不是黄色的情况 下，使全部颜色更加鲜艳、均衡。By the above color signal conversion method, it is possible to make the input color not yellow Under, make all colors more vivid and balanced.
在一种可能的实现方式中，在上述步骤S2020中，可以根据如下公式3来获取所述第三RGBY信号在所述RGB三角形中对应的点D2，In a possible implementation manner, in the foregoing step S2020, the corresponding point D2 of the third RGBY signal in the RGB triangle may be acquired according to the following formula 3,
OD2＝OD*S1          式3OD2=OD*S1 Equation 3
其中，OD2为线段OD2的长度，OD为线段OD的长度，S1为提升后的相对饱和度。Where OD2 is the length of the line segment OD2, OD is the length of the line segment OD, and S1 is the relative saturation after the lifting.
图4示出本发明实施例中输入颜色不是黄色时的色彩信号转换方法的具体示例，如图4所示，该色彩信号转换方法主要可以包括以下步骤。FIG. 4 shows a specific example of a color signal conversion method when the input color is not yellow in the embodiment of the present invention. As shown in FIG. 4, the color signal conversion method may mainly include the following steps.
(1)使用色彩分析仪CA310或者其它仪器分别测量LCD的RGB信号的XYZ，并且根据光的线性叠加原理可以计算出所输入的任意RGB信号的色度(x，y)和亮度Y(如图4中的步骤S300、S310)。具体地，根据光的线性叠加原理，由公式：X＝Xr+Xg+Xb，Y＝Yr+Yg+Yb，Z＝Zr+Zg+Zb即可得到任意的RGB信号的XYZ。然后，根据色度学公式x＝X/(X+Y+Z)，y＝Y/(X+Y+Z)，可以计算出对应的色度值、即色度坐标。这样，可以计算出LCD显示全部颜色对应的色度(x，y)和亮度Y。这里，RGB信号中的R信号、G信号、B信号的灰阶值范围均可以为0～255，即最小灰阶值为0，最大灰阶值为255。换句话说，对于8 bit的LCD而言，共有2553种RGB组合和颜色。(1) Measure the XYZ of the LCD RGB signal using the color analyzer CA310 or other instruments, and calculate the chromaticity (x, y) and brightness Y of the input arbitrary RGB signal according to the linear superposition principle of light (Figure 4). Steps S300, S310). Specifically, according to the principle of linear superposition of light, XYZ of an arbitrary RGB signal can be obtained by the formula: X=Xr+Xg+Xb, Y=Yr+Yg+Yb, Z=Zr+Zg+Zb. Then, according to the colorimetric formula x=X/(X+Y+Z), y=Y/(X+Y+Z), the corresponding chromaticity value, that is, the chromaticity coordinate can be calculated. In this way, the chromaticity (x, y) and the luminance Y corresponding to the entire color of the LCD display can be calculated. Here, the grayscale value range of the R signal, the G signal, and the B signal in the RGB signal may all be 0 to 255, that is, the minimum grayscale value is 0, and the maximum grayscale value is 255. In other words, for an 8-bit LCD, there are 255 3 RGB combinations and colors.
(2)根据上述色度数据，可以计算出任意输入的RGB信号的相对饱和度S(如图4所示的步骤S320)。(2) Based on the above chromaticity data, the relative saturation S of the RGB signal of any input can be calculated (step S320 shown in Fig. 4).
具体而言，根据步骤(1)所测得的RGB从最小灰阶值到最大灰阶值、即0～255阶的色度值，可以得到如图3所示的表示LCD的色域范围的三角形(以下称为RGB三角形)。Specifically, according to the RGB measured from the minimum grayscale value to the maximum grayscale value, that is, the chromaticity value of 0 to 255 steps measured in the step (1), the color gamut range indicating the LCD can be obtained as shown in FIG. Triangle (hereinafter referred to as RGB triangle).
根据步骤(1)，可以计算出任意RGB组合的色度值，并且，能够根据所计算出的RGB组合的色度值，来确定在上述RGB三角形中与该色度值相对应的点。以待转换的RGB信号为例，可以首先计算出其色度值，然后确定与该色 度值相对应的点，如图3所示为D1。其中，如图3所示，在该RGB三角形中，与RGB＝(255，255，255)时对应的色度点为O。连接OD1，并将线段OD1延OD1方向延长，得到射线OD1。并且，该射线OD1与上述RGB三角形的边相交的点可以设为D。According to the step (1), the chromaticity values of the arbitrary RGB combinations can be calculated, and the points corresponding to the chromaticity values in the RGB triangles can be determined based on the calculated chromaticity values of the RGB combinations. Taking the RGB signal to be converted as an example, the chrominance value can be calculated first, and then the color is determined. The point corresponding to the degree value is D1 as shown in FIG. Here, as shown in FIG. 3, in the RGB triangle, the chromaticity point corresponding to RGB=(255, 255, 255) is 0. The OD1 is connected, and the line segment OD1 is extended in the OD1 direction to obtain the ray OD1. Further, a point at which the ray OD1 intersects with the side of the RGB triangle may be set to D.
由此，可以计算出该RGB信号的相对饱和度S＝OD1/OD，其中，OD1、OD分别表示线段OD1和OD的长度。Thereby, the relative saturation S = OD1/OD of the RGB signal can be calculated, wherein OD1, OD represent the lengths of the line segments OD1 and OD, respectively.
(3)使用正弦函数S1＝sin(S*pi/2)对饱和度S进行转换(如图4所示的步骤S330)，其中pi＝π。(3) The saturation S is converted using a sine function S1 = sin (S * pi / 2) (step S330 shown in Fig. 4), where pi = π.
具体而言，对于在步骤(2)中得到的相对饱和度S，在一种可能的实现方式中，可以使用正弦函数S1＝sin(S*pi/2)进行适当的拉伸，以提升RGB信号的相对饱和度。由于S在(0，1)范围内，而sin函数在(0，pi/2)内非线性递增变化，因此，S1是随着S的增大而增大的。这样，可以得到RGB信号的新的相对饱和度S1，且能够保证RGB信号的平滑过渡，而不会出现过饱和现象。对饱和度拉伸的正弦函数图可以大致如图5所示。Specifically, for the relative saturation S obtained in the step (2), in a possible implementation, the sine function S1=sin(S*pi/2) can be used for appropriate stretching to enhance RGB. The relative saturation of the signal. Since S is in the range of (0, 1) and the sin function changes nonlinearly within (0, pi/2), S1 increases as S increases. In this way, a new relative saturation S1 of the RGB signal can be obtained, and a smooth transition of the RGB signal can be ensured without oversaturation. The sinusoidal function diagram for saturation stretching can be roughly as shown in FIG.
利用上述正弦函数，可以适当提高RGB信号的相对饱和度。当RGB信号本身的饱和度越高时，能够对其提升的程度会越来越小。这样就可以避免出现过饱和及色带或者色块的出现。With the above sinusoidal function, the relative saturation of the RGB signals can be appropriately increased. When the saturation of the RGB signal itself is higher, the degree of improvement can be made smaller and smaller. This avoids the occurrence of oversaturation and ribbon or color patches.
以上以正弦函数为例说明了对RGB信号的相对饱和度进行提升。在一种可能的实现方式中，也可以使其它函数来对RGB信号的相对饱和度进行提升，只要该函数能够满足使RGB信号的相对饱和度提升，并且该函数在(0，1)的范围内呈线性递增变化即可。例如，还可以将RGB信号的相对饱和度S乘以某一大于1的数。The above sinusoidal function is taken as an example to illustrate the improvement of the relative saturation of RGB signals. In a possible implementation, other functions may also be used to enhance the relative saturation of the RGB signal as long as the function satisfies the relative saturation of the RGB signal and the function is in the range of (0, 1). It can be changed linearly inward. For example, the relative saturation S of the RGB signal can also be multiplied by a number greater than one.
(4)保持色调H不变，根据新的相对饱和度S1，计算出新的色度点的色度坐标D2(如图4所示的步骤S340)。(4) The hue H is kept constant, and the chromaticity coordinate D2 of the new chromaticity point is calculated based on the new relative saturation S1 (step S340 shown in Fig. 4).
具体而言，根据在步骤(3)中得到的饱和度S1及步骤(2)中RGB三角形中 的线段OD的长度，来确定相对饱和度提升后新的色度点D2。例如，利用上述公式3能够线段OD2的长度，从而确定出相对饱和度提升后新的色度点D2。如图3所示，新的色度点D2和原始色度点D1的色调H相同，只是饱和度有改变，即新的色度点D2相对于原始色度点D1的相对饱和度有所提升。Specifically, according to the saturation S1 obtained in the step (3) and the RGB triangle in the step (2) The length of the line segment OD is used to determine the new chromaticity point D2 after the relative saturation is increased. For example, the length of the line segment OD2 can be determined by using the above formula 3, thereby determining the new chromaticity point D2 after the relative saturation is increased. As shown in FIG. 3, the new chromaticity point D2 is the same as the hue H of the original chromaticity point D1, except that the saturation is changed, that is, the relative saturation of the new chromaticity point D2 relative to the original chromaticity point D1 is improved. .
(5)根据D2的坐标及原始测量数据，找出某些RGB组合，使它们的色度坐标在D2点，再根据亮度最接近原始RGB亮度的原则，确定最终输出的RGB信号Y(其中，Y的灰阶值为最小灰阶值)信号(如图4所示的步骤S350)。(5) According to the coordinates of D2 and the original measurement data, find some RGB combinations so that their chromaticity coordinates are at point D2, and then determine the final output RGB signal Y according to the principle that the brightness is closest to the original RGB brightness (where The gray scale value of Y is the minimum gray scale value) signal (step S350 shown in FIG. 4).
需要说明的是，在上述色彩信号转换方法，以色度点D1进行了说明。本领域技术人员能够知道，利用上述色彩信号转换方法，能够对任意的RGB信号对应的色度点进行转换，以相对饱和度提升但色调H不变的RGB信号。It should be noted that the above-described color signal conversion method has been described with the chromaticity point D1. Those skilled in the art can know that, by using the above-described color signal conversion method, it is possible to convert chromaticity points corresponding to arbitrary RGB signals to RGB signals which are increased in relative saturation but have a constant hue H.
通过如上所述色彩信号转换方法，能够使得在所输入的颜色不是黄色的情况下，对RGB信号的色彩进行增强，从而使得输出的RGB信号的色彩更加鲜艳。By the color signal conversion method as described above, it is possible to enhance the color of the RGB signal in the case where the input color is not yellow, so that the color of the output RGB signal is more vivid.
需要说明的是，在上述实施例中，以RGB信号的灰阶值范围为0～255阐述了本发明，本领域技术人员能够知道，RGB信号的灰阶值范围可以为其它范围。此外，在上述实施例中，以预定的亮度曲线伽马值为2.2阐述了本发明，本领域技术人员能够知道，预定的亮度曲线伽马值可以为其它值。It should be noted that, in the above embodiment, the present invention has been described with the gray scale value of the RGB signal ranging from 0 to 255. Those skilled in the art can know that the gray scale value range of the RGB signal can be other ranges. Further, in the above embodiment, the present invention has been described with a predetermined luminance curve gamma value of 2.2, and those skilled in the art can know that the predetermined luminance curve gamma value can be other values.
实施例4Example 4
图6示出根据本发明一实施例的液晶显示屏的色彩信号转换装置的结构框图。如图6所示，色彩信号转换装置60主要可以包括比较单元61和转换输出单元62。其中，比较单元61主要用于比较输入的RGB信号中的R信号、G信号和B信号的灰阶值的大小；转换输出单元62与比较单元61连接，主要用于在所述比较单元61的比较结果为所述RGB信号中的B信号的灰阶值最小并且R信号的灰阶值大于G信号的灰阶值的情况下，将所述RGB信号转换成第一RGBY信号并输出所述第一RGBY信号，其中，所述第一RGBY信号中的Y 信号的灰阶值为所述RGB信号中的G信号的灰阶值，所述第一RGBY信号中的G信号的灰阶值为最小灰阶值，所述第一RGBY信号中的B信号的灰阶值为所述RGB信号中的B信号的灰阶值，所述第一RGBY信号中的R信号的灰阶值根据所述RGB信号中的R信号的灰阶值、所述第一RGBY信号中的Y信号的灰阶值、最大灰阶值以及预定的亮度曲线伽马值来确定。FIG. 6 is a block diagram showing the structure of a color signal conversion device of a liquid crystal display according to an embodiment of the present invention. As shown in FIG. 6, the color signal conversion device 60 may mainly include a comparison unit 61 and a conversion output unit 62. The comparison unit 61 is mainly used to compare the magnitudes of the grayscale values of the R signal, the G signal, and the B signal in the input RGB signals; the conversion output unit 62 is connected to the comparison unit 61, and is mainly used in the comparison unit 61. When the comparison result is that the grayscale value of the B signal in the RGB signal is the smallest and the grayscale value of the R signal is greater than the grayscale value of the G signal, the RGB signal is converted into the first RGBY signal and the first An RGBY signal, wherein Y in the first RGBY signal a grayscale value of the signal is a grayscale value of the G signal in the RGB signal, a grayscale value of the G signal in the first RGBY signal is a minimum grayscale value, and a B signal in the first RGBY signal The grayscale value is a grayscale value of the B signal in the RGB signal, and the grayscale value of the R signal in the first RGBY signal is according to a grayscale value of the R signal in the RGB signal, the first RGBY The grayscale value of the Y signal in the signal, the maximum grayscale value, and a predetermined luminance curve gamma value are determined.
在一种可能的实现方式中，所述转换输出单元62还用于在所述比较单元61的比较结果为所述RGB信号中的B信号的灰阶值最小并且R信号的灰阶值小于或等于G信号的灰阶值的情况下，将所述RGB信号转换成第二RGBY信号并输出所述第二RGBY信号，其中，所述第二RGBY信号中的Y信号的灰阶值为所述RGB信号中的R信号的灰阶值，所述第二RGBY信号中的R信号的灰阶值为最小灰阶值，所述第二RGBY信号中的B信号的灰阶值为所述RGB信号中的B信号的灰阶值，所述第二RGBY信号中的G信号的灰阶值根据所述RGB信号中的G信号的灰阶值、所述第二RGBY信号中的Y信号的灰阶值、最大灰阶值以及所述预定的亮度曲线伽马值来确定。In a possible implementation, the conversion output unit 62 is further configured to: when the comparison result of the comparison unit 61 is that the gray level value of the B signal in the RGB signal is the smallest and the gray level value of the R signal is less than or In the case of a grayscale value equal to the G signal, converting the RGB signal into a second RGBY signal and outputting the second RGBY signal, wherein a grayscale value of the Y signal in the second RGBY signal is a grayscale value of the R signal in the RGB signal, a grayscale value of the R signal in the second RGBY signal is a minimum grayscale value, and a grayscale value of the B signal in the second RGBY signal is the RGB signal a grayscale value of the B signal in the second RGBY signal, a grayscale value of the G signal according to the grayscale value of the G signal in the RGB signal, and a grayscale value of the Y signal in the second RGBY signal The value, the maximum grayscale value, and the predetermined luminance curve gamma value are determined.
本实施例的上述色彩信号转换装置能够用来执行上述实施例1的色彩信号转换方法，该色彩信号转换方法的具体流程参见上述实施例1的具体阐述。The color signal conversion device of the present embodiment can be used to perform the color signal conversion method of the first embodiment. The specific flow of the color signal conversion method is described in detail in the above embodiment 1.
在一种可能的实现方式中，在所述RGB信号中的R信号的灰阶值大于G信号的灰阶值的情况下，所述转换输出单元62根据如下公式1来计算所述第一RGBY信号中的R信号的灰阶值，In a possible implementation manner, in a case where the grayscale value of the R signal in the RGB signal is greater than the grayscale value of the G signal, the conversion output unit 62 calculates the first RGBY according to the following formula 1. The grayscale value of the R signal in the signal,
Figure PCTCN2016098789-appb-000007
Figure PCTCN2016098789-appb-000007
其中，R2为所述第一RGBY信号中的R信号的灰阶值，N为最大灰阶值，R1为所述RGB信号中的R信号的灰阶值，Y2为所述第一RGBY信号中的Y信号的灰阶值，γ是预定的亮度曲线伽马值。Wherein R 2 is a grayscale value of the R signal in the first RGBY signal, N is a maximum grayscale value, R 1 is a grayscale value of the R signal in the RGB signal, and Y 2 is the first The gray scale value of the Y signal in the RGBY signal, γ is a predetermined luminance curve gamma value.
在一种可能的实现方式中，在所述RGB信号中的R信号的灰阶值小于或 等于G信号的灰阶值的情况下，所述转换输出单元62根据如下公式2来计算所述第二RGBY信号中的G信号的灰阶值，In a possible implementation manner, the gray level value of the R signal in the RGB signal is less than or In the case of a grayscale value equal to the G signal, the conversion output unit 62 calculates a grayscale value of the G signal in the second RGBY signal according to Equation 2 below,
Figure PCTCN2016098789-appb-000008
Figure PCTCN2016098789-appb-000008
其中，G2为所述第二RGBY信号中的G信号的灰阶值，N为最大灰阶值，G1为所述RGB信号中的G信号的灰阶值，Y2为所述第二RGBY信号中的Y信号的灰阶值，γ是预定的亮度曲线伽马值。Wherein G 2 is a grayscale value of a G signal in the second RGBY signal, N is a maximum grayscale value, G 1 is a grayscale value of a G signal in the RGB signal, and Y 2 is the second The gray scale value of the Y signal in the RGBY signal, γ is a predetermined luminance curve gamma value.
本实施例的上述色彩信号转换装置能够用来执行上述实施例2的色彩信号转换方法，该色彩信号转换方法的具体流程参见上述实施例2的具体阐述。The color signal conversion device of the present embodiment can be used to perform the color signal conversion method of the second embodiment. For the specific flow of the color signal conversion method, refer to the specific embodiment of the above embodiment 2.
在一种可能的实现方式中，所述转换输出单元62还用于在所述比较单元61的比较结果为所述RGB信号中的B信号的灰阶值不是最小的情况下，将所述RGB信号转换成第三RGBY信号并输出所述第三RGBY信号，其中，将所述RGB信号转换成第三RGBY信号并输出所述第三RGBY信号，包括：对所述RGB信号的相对饱和度进行提升；根据所述RGB信号的提升后的相对饱和度以及RGB三角形中的线段OD的长度，来获取所述RGB三角形中对应的点D2，所述RGB三角形用于表示所述液晶显示屏的色域范围；以及根据D2的色度坐标来输出所述第三RGBY信号，其中所述第三RGBY信号中的Y信号的灰阶值为最小灰阶值，其中，在所述RGB三角形中，O点由参考白点坐标确定，D1点为所述RGB信号在所述RGB三角形中对应的点，D点为射线OD1与所述RGB三角形的交点。In a possible implementation manner, the conversion output unit 62 is further configured to: when the comparison result of the comparison unit 61 is that the grayscale value of the B signal in the RGB signal is not the smallest, the RGB is Converting a signal into a third RGBY signal and outputting the third RGBY signal, wherein converting the RGB signal into a third RGBY signal and outputting the third RGBY signal comprises: performing relative saturation of the RGB signal Lifting; obtaining a corresponding point D2 of the RGB triangle according to the increased relative saturation of the RGB signal and the length of the line segment OD in the RGB triangle, the RGB triangle being used to represent the color of the liquid crystal display Domain range; and outputting the third RGBY signal according to chromaticity coordinates of D2, wherein a grayscale value of the Y signal in the third RGBY signal is a minimum grayscale value, wherein, among the RGB triangles, The point is determined by reference white point coordinates, the point D1 is the corresponding point of the RGB signal in the RGB triangle, and the point D is the intersection of the ray OD1 and the RGB triangle.
在一种可能的实现方式中，所述转换输出单元62根据如下公式3来获取所述第三RGBY信号在所述RGB三角形中对应的点D2，In a possible implementation, the conversion output unit 62 acquires a corresponding point D2 of the third RGBY signal in the RGB triangle according to the following formula 3,
OD2＝OD*S1            式3OD2=OD*S1 Equation 3
其中，OD2为线段OD2的长度，OD为线段OD的长度，S1为提升后的相对饱和度。 Where OD2 is the length of the line segment OD2, OD is the length of the line segment OD, and S1 is the relative saturation after the lifting.
本实施例的上述色彩信号转换装置能够用来执行上述实施例3的色彩信号转换方法，该色彩信号转换方法的具体流程参见上述实施例3的具体阐述。The above-mentioned color signal conversion device of the present embodiment can be used to perform the color signal conversion method of the third embodiment. The specific flow of the color signal conversion method is described in detail in the above embodiment 3.
根据本发明实施例的液晶显示屏的色彩信号转换装置，能够将原始的RGB信号转换成RGBY信号。在所输入的颜色为黄色的情况下，能够输出使黄色的色彩更加鲜艳的RGBY信号，在所输入的颜色不是黄色的情况下，能够输出使其它颜色的色彩更加鲜艳的RGB信号。这样，根据本发明实施例的色彩信号转换方装置，能够使得转换后的色彩信号的颜色更加鲜艳。A color signal conversion device of a liquid crystal display according to an embodiment of the present invention is capable of converting an original RGB signal into an RGBY signal. When the input color is yellow, an RGBY signal that makes the yellow color more vivid can be output, and when the input color is not yellow, an RGB signal that makes the colors of other colors more vivid can be output. Thus, the color signal conversion device according to the embodiment of the present invention can make the color of the converted color signal more vivid.
实施例5Example 5
图7示出根据本发明一实施例的液晶显示屏的色彩信号转换装置的结构框图。所述液晶显示屏的色彩信号转换装置1100可以是具备计算能力的主机服务器、个人计算机PC、或者可携带的便携式计算机或终端等。本发明具体实施例并不对计算节点的具体实现做限定。FIG. 7 is a block diagram showing the structure of a color signal conversion device of a liquid crystal display according to an embodiment of the present invention. The color signal conversion device 1100 of the liquid crystal display may be a host server having a computing capability, a personal computer PC, or a portable computer or terminal that can be carried. The specific embodiments of the present invention do not limit the specific implementation of the computing node.
所述液晶显示屏的色彩信号转换装置1100包括处理器(processor)1110、通信接口(Communications Interface)1120、存储器(memory)1130和总线1140。其中，处理器1110、通信接口1120、以及存储器1130通过总线1140完成相互间的通信。The color signal conversion device 1100 of the liquid crystal display includes a processor 1110, a communication interface 1120, a memory 1130, and a bus 1140. The processor 1110, the communication interface 1120, and the memory 1130 complete communication with each other through the bus 1140.
通信接口1120用于与网络设备通信，其中网络设备包括例如虚拟机管理中心、共享存储等。 Communication interface 1120 is for communicating with network devices, including, for example, a virtual machine management center, shared storage, and the like.
处理器1110用于执行程序。处理器1110可能是一个中央处理器CPU，或者是专用集成电路ASIC(Application Specific Integrated Circuit)，或者是被配置成实施本发明实施例的一个或多个集成电路。The processor 1110 is configured to execute a program. The processor 1110 may be a central processing unit CPU, or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.
存储器1130用于存放文件。存储器1130可能包含高速RAM存储器，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。存储器1130也可以是存储器阵列。存储器1130还可能被分块，并且所述块可按一定的规则组合成虚拟卷。 The memory 1130 is used to store files. The memory 1130 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory. Memory 1130 can also be a memory array. The memory 1130 may also be partitioned, and the blocks may be combined into a virtual volume according to certain rules.
在一种可能的实施方式中，上述程序可为包括计算机操作指令的程序代码。该程序具体可用于：实现实施例1至实施例3中各步骤的操作。In a possible implementation, the above program may be program code including computer operating instructions. The program can be specifically used to: perform the operations of the steps in Embodiments 1 to 3.
本领域普通技术人员可以意识到，本文所描述的实施例中的各示例性单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件形式来实现，取决于技术方案的特定应用和设计约束条件。专业技术人员可以针对特定的应用选择不同的方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。Those of ordinary skill in the art will appreciate that the various exemplary elements and algorithm steps in the embodiments described herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can select different methods for implementing the described functions for a particular application, but such implementation should not be considered to be beyond the scope of the present invention.
如果以计算机软件的形式来实现所述功能并作为独立的产品销售或使用时，则在一定程度上可认为本发明的技术方案的全部或部分(例如对现有技术做出贡献的部分)是以计算机软件产品的形式体现的。该计算机软件产品通常存储在计算机可读取的非易失性存储介质中，包括若干指令用以使得计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各实施例方法的全部或部分步骤。而前述的存储介质包括U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。If the function is implemented in the form of computer software and sold or used as a stand-alone product, it is considered to some extent that all or part of the technical solution of the present invention (for example, a part contributing to the prior art) is It is embodied in the form of computer software products. The computer software product is typically stored in a computer readable non-volatile storage medium, including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all of the methods of various embodiments of the present invention. Or part of the steps. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。 The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims (12)

  1. 一种液晶显示屏的色彩信号转换方法，其特征在于，包括：A color signal conversion method for a liquid crystal display, comprising:
    比较输入的RGB信号中的R信号、G信号和B信号的灰阶值的大小；Comparing the magnitudes of the grayscale values of the R signal, the G signal, and the B signal in the input RGB signal;
    在所述RGB信号中的B信号的灰阶值最小的情况下，比较所述RGB信号中的R信号与G信号的灰阶值的大小；Comparing the magnitudes of the grayscale values of the R signal and the G signal in the RGB signal in a case where the grayscale value of the B signal in the RGB signal is the smallest;
    在所述RGB信号中的R信号的灰阶值大于G信号的灰阶值的情况下，将所述RGB信号转换成第一RGBY信号并输出所述第一RGBY信号，In a case where the grayscale value of the R signal in the RGB signal is greater than the grayscale value of the G signal, converting the RGB signal into a first RGBY signal and outputting the first RGBY signal,
    其中，所述第一RGBY信号中的Y信号的灰阶值为所述RGB信号中的G信号的灰阶值，The grayscale value of the Y signal in the first RGBY signal is a grayscale value of the G signal in the RGB signal,
    所述第一RGBY信号中的G信号的灰阶值为最小灰阶值，The gray scale value of the G signal in the first RGBY signal is a minimum gray scale value,
    所述第一RGBY信号中的B信号的灰阶值为所述RGB信号中的B信号的灰阶值，The grayscale value of the B signal in the first RGBY signal is a grayscale value of the B signal in the RGB signal,
    所述第一RGBY信号中的R信号的灰阶值根据所述RGB信号中的R信号的灰阶值、所述第一RGBY信号中的Y信号的灰阶值、最大灰阶值以及预定的亮度曲线伽马值来确定。a grayscale value of the R signal in the first RGBY signal according to a grayscale value of the R signal in the RGB signal, a grayscale value of the Y signal in the first RGBY signal, a maximum grayscale value, and a predetermined The brightness curve gamma value is determined.
  2. 根据权利要求1所述的方法，其特征在于，还包括：The method of claim 1 further comprising:
    在所述RGB信号中的R信号的灰阶值小于或等于G信号的灰阶值的情况下，将所述RGB信号转换成第二RGBY信号并输出所述第二RGBY信号，In a case where the grayscale value of the R signal in the RGB signal is less than or equal to the grayscale value of the G signal, converting the RGB signal into a second RGBY signal and outputting the second RGBY signal,
    其中，所述第二RGBY信号中的Y信号的灰阶值为所述RGB信号中的R信号的灰阶值，The grayscale value of the Y signal in the second RGBY signal is a grayscale value of the R signal in the RGB signal,
    所述第二RGBY信号中的R信号的灰阶值为最小灰阶值，The gray level value of the R signal in the second RGBY signal is a minimum gray scale value,
    所述第二RGBY信号中的B信号的灰阶值为所述RGB信号中的B信号的灰阶值，The grayscale value of the B signal in the second RGBY signal is a grayscale value of the B signal in the RGB signal,
    所述第二RGBY信号中的G信号的灰阶值根据所述RGB信号中的G信号的灰阶值、所述第二RGBY信号中的Y信号的灰阶值、最大灰阶值以及所述预定的亮度曲线伽马值来确定。 a grayscale value of the G signal in the second RGBY signal according to a grayscale value of the G signal in the RGB signal, a grayscale value of the Y signal in the second RGBY signal, a maximum grayscale value, and the The predetermined brightness curve gamma value is determined.
  3. 根据权利要求1所述的方法，其特征在于，在所述RGB信号中的R信号的灰阶值大于G信号的灰阶值的情况下，根据如下公式1来计算所述第一RGBY信号中的R信号的灰阶值，The method according to claim 1, wherein in the case where the grayscale value of the R signal in the RGB signal is greater than the grayscale value of the G signal, the first RGBY signal is calculated according to the following formula 1 Grayscale value of the R signal,
    Figure PCTCN2016098789-appb-100001
    Figure PCTCN2016098789-appb-100001
    其中，R2为所述第一RGBY信号中的R信号的灰阶值，N为最大灰阶值，R1为所述RGB信号中的R信号的灰阶值，Y2为所述第一RGBY信号中的Y信号的灰阶值，γ是所述预定的亮度曲线伽马值。Wherein R 2 is a grayscale value of the R signal in the first RGBY signal, N is a maximum grayscale value, R 1 is a grayscale value of the R signal in the RGB signal, and Y 2 is the first The gray scale value of the Y signal in the RGBY signal, γ is the predetermined luminance curve gamma value.
  4. 根据权利要求2所述的方法，其特征在于，在所述RGB信号中的R信号的灰阶值小于或等于G信号的灰阶值的情况下，根据如下公式2来计算所述第二RGBY信号中的G信号的灰阶值，The method according to claim 2, wherein in the case where the grayscale value of the R signal in the RGB signal is less than or equal to the grayscale value of the G signal, the second RGBY is calculated according to the following formula 2 The grayscale value of the G signal in the signal,
    Figure PCTCN2016098789-appb-100002
    Figure PCTCN2016098789-appb-100002
    其中，G2为所述第二RGBY信号中的G信号的灰阶值，N为最大灰阶值，G1为所述RGB信号中的G信号的灰阶值，Y2为所述第二RGBY信号中的Y信号的灰阶值，γ是所述预定的亮度曲线伽马值。Wherein G 2 is a grayscale value of a G signal in the second RGBY signal, N is a maximum grayscale value, G 1 is a grayscale value of a G signal in the RGB signal, and Y 2 is the second The gray scale value of the Y signal in the RGBY signal, γ is the predetermined luminance curve gamma value.
  5. 根据权利要求1-4中任一项所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 1 to 4, wherein the method further comprises:
    在所述RGB信号中的B信号的灰阶值不是最小的情况下，将所述RGB信号转换成第三RGBY信号并输出所述第三RGBY信号，In a case where the grayscale value of the B signal in the RGB signal is not the smallest, the RGB signal is converted into a third RGBY signal and the third RGBY signal is output,
    其中，将所述RGB信号转换成第三RGBY信号并输出所述第三RGBY信号，包括：The converting the RGB signal into a third RGBY signal and outputting the third RGBY signal includes:
    对所述RGB信号的相对饱和度进行提升；Enhancing the relative saturation of the RGB signals;
    根据所述RGB信号的提升后的相对饱和度以及RGB三角形中的线段OD的长度，来获取所述RGB三角形中对应的点D2，所述RGB三角形用于表示 所述液晶显示屏的色域范围；以及Obtaining a corresponding point D2 in the RGB triangle according to the improved relative saturation of the RGB signal and the length of the line segment OD in the RGB triangle, the RGB triangle being used to represent a color gamut range of the liquid crystal display;
    根据D2的色度坐标来输出所述第三RGBY信号，其中所述第三RGBY信号中的Y信号的灰阶值为最小灰阶值，Outputting the third RGBY signal according to chromaticity coordinates of D2, wherein a grayscale value of the Y signal in the third RGBY signal is a minimum grayscale value,
    其中，在所述RGB三角形中，O点由参考白点坐标确定，D1点为所述RGB信号在所述RGB三角形中对应的点，D点为射线OD1与所述RGB三角形的交点。Wherein, in the RGB triangle, the O point is determined by reference white point coordinates, the D1 point is a point corresponding to the RGB signal in the RGB triangle, and the D point is an intersection of the ray OD1 and the RGB triangle.
  6. 根据权利要求5所述的方法，其特征在于，根据如下公式3来获取所述第三RGBY信号在所述RGB三角形中对应的点D2，The method according to claim 5, wherein the corresponding point D2 of the third RGBY signal in the RGB triangle is obtained according to the following formula 3,
    OD2＝OD*S1                 式3OD2=OD*S1 Equation 3
    其中，OD2为线段OD2的长度，OD为线段OD的长度，S1为提升后的相对饱和度。Where OD2 is the length of the line segment OD2, OD is the length of the line segment OD, and S1 is the relative saturation after the lifting.
  7. 一种液晶显示屏的色彩信号转换装置，其特征在于，包括：A color signal conversion device for a liquid crystal display, comprising:
    比较单元，用于比较输入的RGB信号中的R信号、G信号和B信号的灰阶值的大小；以及a comparing unit for comparing a magnitude of a grayscale value of the R signal, the G signal, and the B signal in the input RGB signal;
    转换输出单元，与所述比较单元连接，用于在所述比较单元的比较结果为所述RGB信号中的B信号的灰阶值最小并且R信号的灰阶值大于G信号的灰阶值的情况下，将所述RGB信号转换成第一RGBY信号并输出所述第一RGBY信号，And a conversion output unit, connected to the comparison unit, wherein a comparison result of the comparison unit is that a grayscale value of a B signal in the RGB signal is minimum and a grayscale value of the R signal is greater than a grayscale value of the G signal In the case, converting the RGB signal into a first RGBY signal and outputting the first RGBY signal,
    其中，所述第一RGBY信号中的Y信号的灰阶值为所述RGB信号中的G信号的灰阶值，The grayscale value of the Y signal in the first RGBY signal is a grayscale value of the G signal in the RGB signal,
    所述第一RGBY信号中的G信号的灰阶值为最小灰阶值，The gray scale value of the G signal in the first RGBY signal is a minimum gray scale value,
    所述第一RGBY信号中的B信号的灰阶值为所述RGB信号中的B信号的灰阶值，The grayscale value of the B signal in the first RGBY signal is a grayscale value of the B signal in the RGB signal,
    所述第一RGBY信号中的R信号的灰阶值根据所述RGB信号中的R信号的灰阶值、所述第一RGBY信号中的Y信号的灰阶值、最大灰阶值以及预定 的亮度曲线伽马值来确定。a grayscale value of the R signal in the first RGBY signal according to a grayscale value of the R signal in the RGB signal, a grayscale value of the Y signal in the first RGBY signal, a maximum grayscale value, and a predetermined The brightness curve gamma value is determined.
  8. 根据权利要求7所述的装置，其特征在于，所述转换输出单元还用于在所述比较单元的比较结果为所述RGB信号中的B信号的灰阶值最小并且R信号的灰阶值小于或等于G信号的灰阶值的情况下，将所述RGB信号转换成第二RGBY信号并输出所述第二RGBY信号，The apparatus according to claim 7, wherein the conversion output unit is further configured to: in the comparison result of the comparing unit, a grayscale value of a B signal in the RGB signal is minimum and a grayscale value of the R signal is In the case of less than or equal to the grayscale value of the G signal, converting the RGB signal into a second RGBY signal and outputting the second RGBY signal,
    其中，所述第二RGBY信号中的Y信号的灰阶值为所述RGB信号中的R信号的灰阶值，The grayscale value of the Y signal in the second RGBY signal is a grayscale value of the R signal in the RGB signal,
    所述第二RGBY信号中的R信号的灰阶值为最小灰阶值，The gray level value of the R signal in the second RGBY signal is a minimum gray scale value,
    所述第二RGBY信号中的B信号的灰阶值为所述RGB信号中的B信号的灰阶值，The grayscale value of the B signal in the second RGBY signal is a grayscale value of the B signal in the RGB signal,
    所述第二RGBY信号中的G信号的灰阶值根据所述RGB信号中的G信号的灰阶值、所述第二RGBY信号中的Y信号的灰阶值、最大灰阶值以及所述预定的亮度曲线伽马值来确定。a grayscale value of the G signal in the second RGBY signal according to a grayscale value of the G signal in the RGB signal, a grayscale value of the Y signal in the second RGBY signal, a maximum grayscale value, and the The predetermined brightness curve gamma value is determined.
  9. 根据权利要求7所述的装置，其特征在于，在所述RGB信号中的R信号的灰阶值大于G信号的灰阶值的情况下，所述转换输出单元根据如下公式1来计算所述第一RGBY信号中的R信号的灰阶值，The apparatus according to claim 7, wherein in the case where the grayscale value of the R signal in the RGB signal is greater than the grayscale value of the G signal, the conversion output unit calculates the The grayscale value of the R signal in the first RGBY signal,
    Figure PCTCN2016098789-appb-100003
    Figure PCTCN2016098789-appb-100003
    其中，R2为所述第一RGBY信号中的R信号的灰阶值，N为最大灰阶值，R1为所述RGB信号中的R信号的灰阶值，Y2为所述第一RGBY信号中的Y信号的灰阶值，γ是预定的亮度曲线伽马值。Wherein R 2 is a grayscale value of the R signal in the first RGBY signal, N is a maximum grayscale value, R 1 is a grayscale value of the R signal in the RGB signal, and Y 2 is the first The gray scale value of the Y signal in the RGBY signal, γ is a predetermined luminance curve gamma value.
  10. 根据权利要求8所述的装置，其特征在于，在所述RGB信号中的R信号的灰阶值小于或等于G信号的灰阶值的情况下，所述转换输出单元根据如下公式2来计算所述第二RGBY信号中的G信号的灰阶值，The apparatus according to claim 8, wherein in a case where a grayscale value of the R signal in the RGB signal is less than or equal to a grayscale value of the G signal, the conversion output unit calculates according to the following formula 2 a grayscale value of the G signal in the second RGBY signal,
    Figure PCTCN2016098789-appb-100004
    Figure PCTCN2016098789-appb-100004
    其中，G2为所述第二RGBY信号中的G信号的灰阶值，N为最大灰阶值，G1为所述RGB信号中的G信号的灰阶值，Y2为所述第二RGBY信号中的Y信号的灰阶值，γ是预定的亮度曲线伽马值。Wherein G 2 is a grayscale value of a G signal in the second RGBY signal, N is a maximum grayscale value, G 1 is a grayscale value of a G signal in the RGB signal, and Y 2 is the second The gray scale value of the Y signal in the RGBY signal, γ is a predetermined luminance curve gamma value.
  11. 根据权利要求7-10中任一项所述的装置，其特征在于，所述转换输出单元还用于在所述比较单元的比较结果为所述RGB信号中的B信号的灰阶值不是最小的情况下，将所述RGB信号转换成第三RGBY信号并输出所述第三RGBY信号，The apparatus according to any one of claims 7 to 10, wherein the conversion output unit is further configured to: when the comparison result of the comparison unit is that the gray level value of the B signal in the RGB signal is not the minimum In the case of converting the RGB signal into a third RGBY signal and outputting the third RGBY signal,
    其中，将所述RGB信号转换成第三RGBY信号并输出所述第三RGBY信号，包括：The converting the RGB signal into a third RGBY signal and outputting the third RGBY signal includes:
    对所述RGB信号的相对饱和度进行提升；Enhancing the relative saturation of the RGB signals;
    根据所述RGB信号的提升后的相对饱和度以及RGB三角形中的线段OD的长度，来获取所述RGB三角形中对应的点D2，所述RGB三角形用于表示所述液晶显示屏的色域范围；以及Obtaining a corresponding point D2 in the RGB triangle according to the improved relative saturation of the RGB signal and the length of the line segment OD in the RGB triangle, the RGB triangle being used to represent the color gamut range of the liquid crystal display ;as well as
    根据D2的色度坐标来输出所述第三RGBY信号，其中所述第三RGBY信号中的Y信号的灰阶值为最小灰阶值，Outputting the third RGBY signal according to chromaticity coordinates of D2, wherein a grayscale value of the Y signal in the third RGBY signal is a minimum grayscale value,
    其中，在所述RGB三角形中，O点由参考白点坐标确定，D1点为所述RGB信号在所述RGB三角形中对应的点，D点为射线OD1与所述RGB三角形的交点。Wherein, in the RGB triangle, the O point is determined by reference white point coordinates, the D1 point is a point corresponding to the RGB signal in the RGB triangle, and the D point is an intersection of the ray OD1 and the RGB triangle.
  12. 根据权利要求11所述的装置，其特征在于，所述转换输出单元根据如下公式3来获取所述第三RGBY信号在所述RGB三角形中对应的点D2，The apparatus according to claim 11, wherein the conversion output unit acquires a corresponding point D2 of the third RGBY signal in the RGB triangle according to the following formula 3,
    OD2＝OD*S1             式3OD2=OD*S1 Equation 3
    其中，OD2为线段OD2的长度，OD为线段OD的长度，S1为提升后的相对饱和度。 Where OD2 is the length of the line segment OD2, OD is the length of the line segment OD, and S1 is the relative saturation after the lifting.
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