06710548 is referenced by 47 patents and cites 5 patents.

A light emitting device is provided which is capable of displaying in desired colors stably by controlling a change in luminance of OLED when an organic light emitting layer is degraded or there is a change in temperature of the surroundings. A reference value for the amount of current flowing into a pixel portion is calculated from data of a video signal. Then, the pixel portion displays an image in accordance with the data of the video signal and the drive current at the time is measured for all of OLEDs in the pixel portion. The two voltage values supplied from a variable power supply to the pixel portion are corrected such that the measured drive current approaches the reference value. With the above structure, lowering of luminance which accompanies degradation of an organic light emitting layer is prevented and a clear image can be displayed as a result.

Title
Light emitting device and electronic equipment using the same
Application Number
10/72702
Publication Number
6710548 (B2)
Application Date
February 7, 2002
Publication Date
March 23, 2004
Inventor
Hajime Kimura
Kanagawa
US
Agent
Fish & Richardson P C
US
Assignee
Semiconductor Energy Laboratory
US
IPC
H05B 37/02
View Original Source