06411306 is referenced by 84 patents and cites 1 patents.

An apparatus and method is provided for dynamically modifying both the luminance and contrast of an image as it is displayed on a display unit in response to changing lighting conditions. Sensors are utilized to continually measure the luminance of the light illuminating the display unit and the display surround luminance. Measurement signals generated by the light sensors are processed to provide display luminance and contrast adjustment control signals that gradually cause the adjustment of the display unit's luminance and contrast in response thereto. Continual adjustment of the luminance and contrast of a display unit according to changing lighting conditions such that the brightness and contrast perception of the displayed image remains constant under the varying conditions. As a result, a number of advantages our obtained including: the brightness and contrast perception of images displayed on a display unit remains constant as the display device illumination changes; the brightness and contrast perception of images displayed on a display unit remains constant as the display unit surround luminance changes; and power consumption is decreased in dim environments.

Title
Automatic luminance and contrast adustment for display device
Application Number
8/970327
Publication Number
6411306 (B1)
Application Date
November 14, 1997
Publication Date
June 25, 2002
Inventor
James R Niederbaumer
Webster
NY, US
Michael E Miller
Rochester
NY, US
Agent
David A Novais
US
Gordon M Stewart
US
Assignee
Eastman Kodak Company
NY, US
IPC
G09G 5/10
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