06356029 is referenced by 158 patents and cites 6 patents.

In an active matrix electroluminescent display device the drive current through an EL display element (

20

) in each pixel (

10

) in a drive period is controlled by a driving device (

22

) based on a drive signal applied to the pixel in preceding address period and stored as a voltage on an associated storage capacitor (

36

). In order to counteract the effects of display element ageing through which the light output of an element for a given drive signal level diminishes over time, the pixel includes a feedback circuit (

40, 45, 47, 48

) which is responsive to the potential difference across the display element in an initial part of the drive period indicative of the extent of ageing and which is arranged to adjust the voltage stored on the storage capacitance accordingly.

Title
Active matrix electroluminescent display device
Application Number
9/677803
Publication Number
6356029 (B1)
Application Date
October 2, 2000
Publication Date
March 12, 2002
Inventor
Iain M Hunter
Brighton
US
Assignee
U S Philips Corporation
NY, US
IPC
G09G 3/10
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