Method and System for Improving a Color Shift of Viewing Angle of Skin Color of an LCD Screen
First Claim
1. A method for improving a color shift of viewing angle of skin color of an LCD screen, the method comprising:
- obtaining gamma curves of red (R), green (G), blue (B) and white (W) of front viewing angle of skin color picture of the LCD screen under a backlight;
calculating an initial white balance voltage, the initial white balance voltage includes a red-white-balance (RWB) voltage, a green-white-balance (GWB) voltage and a blue-white-balance (BWB) voltage, and adjusting the gamma curves of red (R), green (G) and blue (B) of skin color picture of the LCD screen according to the initial white balance voltage;
obtaining gamma curves of red (R), green (G), blue (B) and white (W) of front viewing angle and oblique viewing angle of skin color picture of the LCD screen after adjusting according to the initial white balance voltage;
comparing the gamma curves and the chromaticity of 0-255 grayscale of front viewing angle and oblique viewing angle to obtain a color shift result of oblique viewing angle of skin color picture of the LCD screen; and
changing a voltage dividing proportion of the blue-white-balance (BWB) voltage according to the color shift result to make a color shift value of oblique viewing angle of skin color picture of the LCD screen be always within a specification requirement;
wherein, the specification requirement is a color difference specification requirement between the front viewing angle and the oblique viewing angle, and the color difference specification requirement is that the color shift value of oblique viewing angle is within (−
0.03, +0.03).
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Abstract
The present invention discloses a method and system for improving a color shift of viewing angle of skin color of an LCD screen. The method comprises: comparing the gamma curves and the chromaticity of 0-255 grayscale of front viewing angle and oblique viewing angle of red (R), green (G), and blue (B) after adjusting according to the initial white balance voltage and changing the voltage dividing proportion of the blue-white-balance (BWB) voltage according to the color shift result to make a color shift value of oblique viewing angle of skin color picture of the LCD screen be always within a specification requirement. Through foregoing method, the present invention makes the color shift of skin color of viewing angle of the LCD screen is always within the specification requirement.
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Citations
13 Claims
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1. A method for improving a color shift of viewing angle of skin color of an LCD screen, the method comprising:
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obtaining gamma curves of red (R), green (G), blue (B) and white (W) of front viewing angle of skin color picture of the LCD screen under a backlight; calculating an initial white balance voltage, the initial white balance voltage includes a red-white-balance (RWB) voltage, a green-white-balance (GWB) voltage and a blue-white-balance (BWB) voltage, and adjusting the gamma curves of red (R), green (G) and blue (B) of skin color picture of the LCD screen according to the initial white balance voltage; obtaining gamma curves of red (R), green (G), blue (B) and white (W) of front viewing angle and oblique viewing angle of skin color picture of the LCD screen after adjusting according to the initial white balance voltage; comparing the gamma curves and the chromaticity of 0-255 grayscale of front viewing angle and oblique viewing angle to obtain a color shift result of oblique viewing angle of skin color picture of the LCD screen; and changing a voltage dividing proportion of the blue-white-balance (BWB) voltage according to the color shift result to make a color shift value of oblique viewing angle of skin color picture of the LCD screen be always within a specification requirement; wherein, the specification requirement is a color difference specification requirement between the front viewing angle and the oblique viewing angle, and the color difference specification requirement is that the color shift value of oblique viewing angle is within (−
0.03, +0.03). - View Dependent Claims (2, 3)
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4. A method for improving a color shift of viewing angle of skin color of an LCD screen, the method comprising:
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obtaining gamma curves of red (R), green (G), blue (B) and white (W) of front viewing angle of skin color picture of the LCD screen under a backlight; calculating an initial white balance voltage, the initial white balance voltage includes a red-white-balance (RWB) voltage, a green-white-balance (GWB) voltage and a blue-white-balance (BWB) voltage, and adjusting the gamma curves of red (R), green (G) and blue (B) of skin color picture of the LCD screen according to the initial white balance voltage; obtaining gamma curves of red (R), green (G), blue (B) and white (W) of front viewing angle and oblique viewing angle of skin color picture of the LCD screen after adjusting according to the initial white balance voltage; comparing the gamma curves and the chromaticity of 0-255 grayscale of front viewing angle and oblique viewing angle to obtain a color shift result of oblique viewing angle of skin color picture of the LCD screen; and changing a voltage dividing proportion of the blue-white-balance (BWB) voltage according to the color shift result to make a color shift value of oblique viewing angle of skin color picture of the LCD screen be always within a specification requirement. - View Dependent Claims (5, 6, 7, 8)
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9. A system for improving a color shift of viewing angle of skin color of an LCD screen, wherein, the system comprises a gamma curve acquisition unit, an adjustment unit, a comparing unit, and a voltage-dividing unit,
wherein the gamma curve acquisition unit obtains gamma curves of red (R), green (G), blue (B) and white (W) of front viewing angle of skin color picture of the LCD screen under a backlight; -
wherein the adjustment unit for calculates an initial white balance voltage, the initial white balance voltage includes a red-white-balance (RWB) voltage, a green-white-balance (GWB) voltage and a blue-white-balance (BWB) voltage, and adjusting the gamma curves of red (R), green (G) and blue (B) of skin color picture of the LCD screen according to the initial white balance voltage; wherein the gamma curve acquisition unit obtains gamma curves of red (R), green (G), blue (B) and white (W) of front viewing angle and oblique viewing angle of skin color picture of the LCD screen after adjusting according to the initial white balance voltage; wherein the comparing unit compares the gamma curves and the chromaticity of 0-255 grayscale of front viewing angle and oblique viewing angle to obtain a color shift result of oblique viewing angle of skin color picture of the LCD screen; and wherein the voltage-dividing unit changes a voltage dividing proportion of the blue-white-balance (BWB) voltage according to the color shift result to make a color shift value or oblique viewing angle of skin color picture of the LCD screen be always within a specification requirement. - View Dependent Claims (10, 11, 12, 13)
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Specification