Abstract: The present invention discloses a method for RGB color space gamut conversion, including: projecting any point o in RGB color space having source graphic data onto points N, M, mapped to coordination points in source cube; projecting point o? corresponding to point o onto points N?, M?, mapped to coordination points in target cube; based on coordination points in target cube, computing points N?, M?; based on points N? and M?, computing point o? in target cube corresponding to point o in RGB color space having source graphic data; and computing target color after color conversion from any point in source graphic data. The invention also discloses an apparatus for RGB color space gamut conversion and an LCD device. With this, it is possible to perform color conversion in RGB color space, adjust color performance of output in hue and color purity, and accentuate specific colors.

Abstract: The present invention discloses a method for RGB color space gamut conversion, including: projecting any point o in RGB color space having source graphic data onto points N, M; projecting point o? corresponding to point o onto points N?, M?; based on matrix equations between point N and point N?, and between point M and point M?, computing point N? and point M?; based on points N?, M?, computing point o? in target cube corresponding to point o in RGB color space having source graphic data; and computing target color after color conversion from any point in source graphic data. The invention also discloses an apparatus for RGB color space gamut conversion and a liquid crystal display device. With this, it is possible to perform color conversion in RGB color space, adjust color performance of output in hue and color purity, and accentuate specific color.

Abstract: A method for driving a liquid crystal display (LCD) panel includes: A: setting an M*M over drive (OD) table, the M*M OD table includes a grey scale value XN*a of a previous-frame image, a grey scale value XN*b of a current-frame image, and an OD value (XN*a, XN*b) corresponding to the grey scale value XN*a and the grey scale value XN*b, where a and b?[0, M], N and M are integers, and N>=2. B: regarding x? as the grey scale value of the previous-frame image and y? as the grey scale value of the current-frame image when the LCD panel is driven, the OD value (x?, y?) is fitted to a continuous two-dimensional surface by reference to an OD value (XN*a, XN*b) in the OD table, and the OD value (x?, y?) is correspondingly calculated according to function of the two-dimensional surface fitted and is output to the LCD panel.

Abstract: A liquid crystal display (LCD) panel comprises scan lines, data lines and a plurality of switch units, and a pixel electrode disposed in a pixel region formed by the scan lines intersecting with the data lines. The pixel electrode comprises a peripheral portion, branch portions and an opening portion located inside the peripheral portion. The branch portions include a first branch portion having plurality of first branches parallel with each other and a second branch portion having a plurality of second branches parallel with each other. The opening portion comprises a first opening and a second opening perpendicularly connected with the first and second branches respectively. The first and second openings are located on midperpendiculars of the first branches and the second branches respectively. Extension lines of the first and second openings intersect with one scan line and one data lines to form a right triangle respectively.

Abstract: The present invention discloses a method for applying gamma compensation to a display and a gamma compensation device. The method comprises: respectively obtaining a brightness value when the display is displaying in a first environment, a brightness value of an ambient light reflected by a screen surface of the display in a second environment, wherein, the first environment is the environment that the display does not generate the ambient light reflected by the display; fitting to obtain a fitted gamma value according to the brightness value when the display is displaying in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment; and adjusting a display brightness when the display is displaying according to the fitted gamma value. Through the above way, the present invention can increase the precise degree of the display in the environment having the ambient light, the sense of hierarchy and comfort.

Abstract: A liquid crystal panel and a liquid crystal display are disclosed. The liquid crystal display includes a liquid crystal cell having a light incident side and a light emitting side, a first polarizer arranged on the light incident side of the liquid crystal panel, a second polarizer arranged on the light emitting side of the liquid crystal panel, and a half wave plate arranged between the first polarizer and the liquid crystal cell. An absorbing axis of the first polarizer is parallel to the absorbing axis of the second polarizer, and an angle between a slow axis of the half wave plate and the absorbing axis of the first polarizer is 45 or 135 degrees. In this way, the liquid crystal display with the two polarizers parallel to each other can be in all-black state when no voltage is applied. In addition, the contrast is greatly enhanced.

Abstract: The present invention proposes a color adjustment device, a method for adjusting color and a display, which first determines a set of three stimulus values displaying as white in the CIE 1931 XYZ color space, and then converts the tristimulus value into a luminance value and two chromaticity values based on the CIE 1976 L* a* b* color space, and determines a set of target luminance value and two target chromaticity values of each and every grayscale respectively according to the set of luminance value and two chromaticity values, and finally converts the set of target luminance value and two target chromaticity values of each and every grayscale into target stimulus sets in accordance with the CIE 1931 XYZ, each grayscale corresponds to a target set of stimulus values. By this way, the color values of whites of all grayscales belong to the same hue.

Abstract: A compensation system for liquid crystal panels and a liquid crystal display are disclosed. The compensation system includes a first biaxial compensation film and a second biaxial compensation film respectively arranged on two sides of the liquid crystal panel. When the wavelength of incident lights is 550 nm, an in-plain retardation value of the first biaxial compensation film is Ro1, a thickness retardation value of the first biaxial compensation film is Rth1, an in-plain retardation value of the second biaxial compensation film is Ro2, and a thickness retardation value of the second biaxial compensation film is Rth2. Wherein 35 nmRo187.5 nm; 80 nmRth1200 nm; 28 nmRo289.6 nm; Y1Rth2Y2; Y1=0.005389×Rth12?2.367048×Rth1+323.45; Y2=?0.003571×Rth12+0.085714×Rth1+226.74. By configuring the retardation values of the double-layers biaxial compensation films, the dark-state light leakage of the liquid crystal panels may be reduced.

Abstract: The present invention provides a CIE Lab color space based color conversion method, which includes converting two-dimensional color planes Ln and Ln-1 of original diagram data into two-dimensional color planes Ln? and Ln-1?; according to a plane Lx of any lightness level between the known Ln and Ln-1, calculating Lx? between Ln? and Ln-1? and having the same lightness level as Lx; calculating a conversion matrix between Lx and Lx?; calculating color-converted and adjusted target color according to the color of any one point of the original diagram data; and completing color space of the target color. The present invention also provides a CIE Lab color space based color conversion device and a liquid crystal display device. With the above method, the present invention allows of easy construction of reverse conversion model. The algorithm can be easily implemented and the operation speed is increased.

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.

Abstract: The present invention provides a method for measuring reflective intensity of display surface, including: obtaining a luminance value of a first display and a luminance value of a second display when displaying, the first display and the second display having the same observed luminance, the peripheral of the surface of the first display being surrounded by light-shielding object, the first display and the second display being placed side by side; and obtaining the reflective intensity of the display surface in the ambient based on the luminance value of the first display and the luminance values of the second display when displaying. As such, the present invention provides convenient and accurate means to measure the reflective intensity of display surface.

Abstract: The present invention discloses a method for establishing evaluation standard parameters and method for evaluating the quality of a display image, wherein, the method comprises: taking pictures to a group of test images having different color shift severity degrees to obtain a sample picture group; selecting a standard picture by human eye; applying the Fourier transform to tristimulus values of all pictures; respectively applying convolution to the frequency distribution function corresponding to each primary color with a contrast sensitivity function of human eye; respectively normalizing to each of the convolution functions; and selecting the evaluation parameters of the three primary colors of the standard picture as the evaluation standard parameters. The present invention can obtain more objective and systemic evaluation standard parameters.

Abstract: The present invention discloses a method for establishing an evaluation standard parameter and method for evaluating the quality of a display image, wherein, the method comprises: taking pictures to a group of test images having different color shift severity degrees to obtain a sample picture group; selecting a standard picture by human eye; applying the Fourier transform for the brightness of the pictures of the sample picture group; applying convolution to the frequency distribution function and a contrast sensitivity function of human eye in the frequency domain; normalizing to the convolution function to obtain an evaluation parameter; selecting the evaluation parameter of the standard picture from the evaluation parameters of all the pictures of the sample picture group as an evaluation standard parameter. The present invention can obtain more objective and systemic evaluation standard parameter.

Abstract: The present invention provides an optical compensation film group and a method for reducing light leakage of a vertical alignment LCD using the same. For the vertical alignment LCD at a wavelength of 550 nm, an LC?nd in the range of [305.8 nm, 324.3 nm], and a pretilt angle in the range of [85°, 90°), a compensation value Ro of an in-plane optical path difference of the biaxial compensation film is in the range of 48 nm?Ro?84 nm, and a compensation value Rth of an out-of-plane optical path difference of the biaxial compensation film is in the range of 160 nm?Rth?280 nm, and a TAC compensation film having a compensation value Rth is in the range of Y1?Rth?Y2. The present invention can effectively improve the serious light leakage caused by the conventional compensation structure with a single biaxial compensation film, the contrast and sharpness at the large viewing angles, and the costs.

Abstract: The present invention provides a compensation system for liquid crystal panel and liquid crystal display device. The compensation system includes first biaxial compensation film and second biaxial compensation film, disposed on two sides of liquid crystal panel respectively, first biaxial compensation film having planar compensation value Ro1 for incident light of 550 nm wavelength and compensation value Rth1 along thickness direction, second biaxial compensation film having planar compensation value Ro2 for incident light of 550 nm wavelength and compensation value Rth2 along thickness direction; wherein 15 nm?Ro1?94 nm; 35 nm?Rth1?214 nm; 35 nm?Rth1?214 nm; 14 nm?Ro2?101 nm; Y1?Rth2?Y2; Y1=0.004302×Rth12?1.96894×Rth1+259.7; Y2=?0.00234308×Rth12?0.32227×Rth1+245. As such, the present invention effectively reduces dark state light leakage of liquid crystal panel by disposing biaxial compensation films of appropriate compensation values.

Abstract: An apparatus and a system for measuring flicker of a display panel are disclosed. The apparatus comprises a light guide tube, a measuring probe for flicker measurement, and an optical device for diverging fight. The light guide tube comprises an opening at a first end and an opening at a second end. The trumpet-shaped light guide tube gradually enlarges from the opening at the second end to the opening at the first end. The opening at the first end is used fir receiving light emitting from the periphery regions and the center region of the display. Light entering into the light guide tube through the opening at the first end emerges from the opening at the second end and is transmitted to the measuring probe through the optical device having a diverging effect. The more overall flicker information is acquired to improve the accuracy of measurement.

Abstract: A display device comprises a VA liquid crystal display unit as well as a front side polarizer and a rear side polarizer arranged respectively at both side of the VA liquid crystal display unit; wherein the VA liquid crystal display unit has an optical path difference ?nd of 324.3 nm to 305.8 nm at the wavelength of 550 nm; the front side polarizer is arranged at a side in the light-exiting direction of the VA liquid crystal unit; one of the front side polarizer and the rear side polarizer includes the biaxial compensation film, which has an in-plane delay Ro of 50.4-78 nm at the wavelength of 550 nm and a thickness direction delay Rth-b of 168-260 nm at the wavelength of 550 nm. The amount of light leakage is significantly reduced with the contrast close to the horizontal viewing angle obviously increased and the display effect further improved.

Abstract: Optical compensation films and a method for reducing dark-state light leakage of vertical alignment liquid crystal displays are disclosed. The light path difference (LC?ND) is in a range of 324.3-342.8 nm, and the pretilt angle is in a range of 85 to 90 degrees when measured at a wavelength of 550 nm. Wherein an in-plain retardation value Ro of the biaxial compensation film is in the range of 48-84 nm, an out-of-plain retardation value Rth of the biaxial compensation film is in the range of 160-280 nm, and a retardation value Rth of the TAC compensation film is within a range between Y1 and Y2. The compensation structure with single layer of biaxial compensation film not only can reduce the dark-state light leakage, but also can increase the contrastness and the resolution in the wide viewing angle.

Abstract: The present invention discloses a compensation system and a liquid crystal display apparatus used for a liquid crystal panel. The compensation system comprises a first biaxial retardation film and a second biaxial retardation film respectively disposed on either side of the liquid crystal panel. An in-plane retardation value of the first biaxial retardation film at a wavelength of 550 nm is Ro1. An out-of-plane retardation value in a thickness direction is Rth1. An in-plane retardation value of the second biaxial retardation film at the wavelength of 550 nm is Ro2. An out-of-plane retardation value in a thickness direction is Rth2. Wherein: 30.8 nm?Ro1?91 nm; 70.4 nm?Rth1?208 nm; 21 nm?Ro2?93.8 nm; Y1?Rth2?Y2; Y1=0.00424817×Rth12?1.9854256×Rth1+277.7: Y2=?0.003333×Rth12?0.033459×Rth1+234.2. The present invention effectively reduces light leakage of the liquid crystal panel in dark mode by disposing the double-layered biaxial retardation films having reasonable retardation values.

Abstract: A compensation system for liquid crystal panels and a liquid crystal display are disclosed. The compensation system includes a first biaxial compensation film and a second biaxial compensation film respectively arranged on two sides of the liquid crystal panel. When the wavelength of incident lights is 550 nm, an in-plain retardation value of the first biaxial compensation film is Ro1, a thickness retardation value of the first biaxial compensation film is Rth1, an in-plain retardation value of the second biaxial compensation film is Ro2, and a thickness retardation value of the second biaxial compensation film is Rth2. Wherein 35 nmRo187.5 nm; 80 nmRth1200 nm; 28 nmRo289.6 nm; Y1Rth2Y2; Y1=0.005389×Rth12?2,367048×Rth1+323. 45; Y2=?0.003571×Rth12+0.085714×Rth1+226.74. By configuring the retardation values of the double-layers biaxial compensation films, the dark-state light leakage of the liquid crystal panels may be reduced.