Patent ID: 7301545
Filing Date: 2007-11-27
Classification: G01J,G09G,H04N

Abstract:
1. A method of visually measuring the brightness of ambient lighting surrounding a display device, the method comprising: selecting the type of the display device; displaying a plurality of gray patterns to set a black level of the display device when the display device is a self-luminescent display device and displaying a plurality of gray patterns to set a white level of the display device when the display device is a transmissive display device; determining a reference brightness of the display device according to whether the gray patterns are visually distinguished from one another by using a brightness adjuster or a contrast adjuster; receiving information about at least one location where the display device is used from a user and setting illuminance values of the display device corresponding to brightness stages based on the reference brightness and the location information; converting a reference image into a converted image having the illuminance values corresponding for each of the brightness stages; displaying the converted images to the user; and selecting an image having a brightness value nearest to the brightness of the ambient lighting, such that the brightness value of the selected image is determined as the brightness of ambient lighting.