1879169-A1 is referenced by 71 patents and cites 3 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 at least a first reference light emitting element (34) which, during use of the display board (30), is driven with a value derived from the image data, and second reference light emitting element (35) which, during use of the display board (30) is not driven. At the time of an intermediate calibration, the at least first and second reference light emitting elements (34, 35) are driven with respectively first and second calibration data and the light emitted by the reference light emitting elements (34, 35) is measured.; The difference between the light emitted by the first reference light emitting element (34) and the light emitted by the second reference light emitting element (35) 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
EP20060014750 20060714
Publication Number
1879169(A1)
Application Date
July 14, 2006
Publication Date
January 16, 2008
Inventor
Gerets Peter
BE
Assignee
Barco
BE
IPC
G09G 03/32
G09G 03/32
View Original Source Download PDF