Patent ID: 7889235
Filing Date: 2011-02-15
Classification: G09G

Abstract:
1. A liquid crystal television adjustment system comprising: a liquid crystal television including a tuner for receiving an analog television signal according to a predetermined broadcasting system from an antenna, thereby generating an intermediate frequency signal before outputting the same, a nonvolatile semiconductor memory capable of rewriting information, a scaler IC for executing analog-to-digital conversion of an analog picture signal as inputted, and generating RGB picture signals to thereby execute white balance adjustment for respective RGB color components of the RGB picture signals by referring to a white balance adjustment value stored in the nonvolatile semiconductor memory, before outputting a picture with white balance adjusted, a liquid crystal module for displaying a picture on a predetermined screen on the basis of the RGB picture signals as inputted, and a microcomputer for controlling the tuner, nonvolatile semiconductor memory, scaler IC, and liquid crystal module; and a computer including a color analyzer capable of picking up an image of a screen of the liquid crystal television, and outputting information corresponding to luminance of a picture as picked up, for causing a test pattern in white to be displayed on the screen of the liquid crystal television, causing the color analyzer to pick up an image of the test pattern displayed on the screen, and acquiring the information corresponding to the luminance of the picture as picked up, thereby setting an adjustment value for adjusting white balance according to the information acquired into the liquid crystal television, wherein the microcomputer sets a white balance adjustment value by setting an output ratio among the respective RGB color components of the RGB picture signals, and causes contrast to be lowered by a predetermined amount by control of the computer to thereby cause the adjustment value set by the computer to be stored in the nonvolatile semiconductor memory, and the computer outputs a picture signal for a white color that is a reference signal to the liquid crystal television, causing the color analyzer to pick up the image of the picture displayed on the screen of the liquid crystal television on the basis of the picture signal outputted, acquires information expressing luminance values of the respective RGB colors of the picture as picked up to thereby generate information expressing chromaticity, determines whether or not the information expressing the chromaticity undergoes a change by increasing outputs of the respective RGB colors of the picture displayed on the screen by a predetermined amount at high luminance while determining whether or not the information expressing the chromaticity undergoes a change by decreasing the outputs of the respective RGB colors of the picture displayed on the screen by a predetermined amount at low luminance, lowers the contrast in the screen by a predetermined amount by controlling the liquid crystal television when it is determined that the information expressing the chromaticity has not changed, and sets the adjustment value into the liquid crystal television when the information expressing the chromaticity substantially matches information expressing chromaticity of a white color.