Patent ID: 8947410
Filing Date: 2015-02-03
Classification: G09G,H04N

Abstract:
1. A power calibration system for a light-based display device, comprising: a display screen having a viewing side and an excitation side; light sources for producing light to form an image on the display screen; a first detector for detecting a brightness of one or more different portions of the image formed on the display screen; a detector assembly including a second detector that measures at least a portional output intensity of one or more of the light sources, wherein the detector assembly is disposed on the excitation side of the display screen, and wherein the detector assembly further includes a neutral-density filter and a current-to-voltage converter circuit; and a controller for controlling one of the light sources to produce the light and recording correlation values that correlate an input power setting of said one of the light sources with the detected brightness of the one or more different portions of the image and the measured portional output intensity.