1879172-A1 is referenced by 70 patents and cites 6 patents.

The present invention provides a display board (30) comprising an array of light emitting elements (31), a driving means (32) for driving the light emitting elements (31) with image data, and an aging determination means (33). The aging determination means (33) comprises one or more light emitting elements for emitting light representative of the light emitted by the light emitting elements (31) of the display board (30), and at least o ne reference light emitting element (35) which, during use of the display board (30) is not driven. At the time of a n intermediate calibration, the at least one reference light emitting element (35) is driven with calibration data and the light emitted by the reference light emitting element (35) is measured, as well as light representative of the light emitted by the light emitting elements.; The difference between the light emitted by the at least one reference light emitting element (35) and the light representative of the light emitted by the light emitting elements is a measure for the degree of aging of the light emitting elements (31) of the array.

Title
Aging compensation for display boards comprising light emitting elements
Application Number
EP20070013567 20070711
Publication Number
1879172 (A1)
Application Date
July 11, 2007
Publication Date
January 16, 2008
Inventor
Gerets Peter
BE
Assignee
Barco
BE
IPC
G09G 03/32
G09G 03/32
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