Patent ID: 6677958
Filing Date: 2004-01-13
Classification: G09G,H04N

Abstract:
A method of calibrating a flat panel, comprising the steps of:a) providing a flat panel display having an overall and individual channel adjustment for both gain and offset and an adjustment to provide a white point for the display, the white point including color temperature, chromaticity and luminance level, b) displaying a first target using a low level code value for each channel of the display; c) sensing the luminance level of the displayed first target; d) adjusting the gain of the display so that the sensed luminance level matches a first predetermined aim value representing a luminance level at least 3 decades lower than a maximum luminance level; e) displaying a second target using intermediate code values for each channel of the display device; f) sensing the luminance level and chromaticities of the displayed second target; g) adjusting the individual channel offsets so that the luminance level matches a second predetermined aim value representing an intermediate luminance level and the chromaticities match a first set of predetermined chromaticities that represent a desired white point; h) displaying a third target using maximum code values for each channel of the display; i) sensing the luminance level and chromaticities of the displayed third target; j) adjusting the individual channel gains so that the luminance level matches a third predetermined aim value the maximum luminance level and the chromaticities match the first set of predetermined chromaticities; and k) repeating steps e) through j) a number of times until no further adjustment is required in step j).