Patent ID: 9064438
Filing Date: 2015-06-23
Classification: G09G

Abstract:
1. A method of compensating for a display defect of a flat panel display, comprising: detecting a display defect of a display panel in a specific reference gray level and receiving position information indicative of a position of the display defect and level information indicative of a degree of the display defect; generating a reference gray level compensation value for compensating for the display defect in the specific reference gray level based on the level information; storing the position information and the reference gray level compensation value in memory; and calculating compensation values for all gray levels by executing gamma point estimation (GPE) functions for expanding the reference gray level compensation value into all the gray levels based on received gain factor control information, modulating digital video data to be displayed in the display defect position by the calculated compensation values, and displaying the modulated digital video data in the display panel, wherein the gamma point estimation functions use only one reference gray level compensation value to obtain compensation values for all gray levels, wherein the gain factor control information includes a parameter fixed for each model and panel, and a parameter for compensating a significance difference between degrees of display defects for respective gray levels, wherein the gain factor control information is used to minutely control the parameters, wherein the GPE functions are used to calculate the compensation values for all the gray levels by nonlinearly changing the reference compensation data in response to the entire gray level area, and wherein the GPE functions are represented by the following equations, where ‘M1data’ denotes the only one reference gray level compensation value, ‘Input Data’ denotes the digital video data to be displayed in the display defect position, ‘α’ denotes the parameter fixed for each model and panel, ‘β’ denotes the parameter for compensating the significance difference between degrees of display defects for respective gray levels, ‘M2data’ denotes the compensation values for all the gray levels, and ‘Output Data’ denotes the digital video data modulated by the compensation values.