Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Mitsuaki Osame0
Jun Koyama0
Mai Osada0
Shunpei Yamazaki0
Date of Patent
November 24, 2009
Patent Application Number
10920279
Date Filed
August 18, 2004
Patent Citations Received
Patent Primary Examiner
Patent abstract
The present invention is intended to suppress power consumption of an EL display. In accordance with the brightness of an image to be displayed in a pixel portion, the contrast of the image is determined whether to be inverted or not, and the number of bits of the digital video signal to be input into the pixel portion is reduced, and the magnitude of a current to flow through the EL element is allowed to be maintained at a constant level even when a temperature of an EL layer changes by providing the EL display with another EL element to be used for monitoring a temperature.
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