Testing an image display device

Details Testing an image display device Testing an image display device

2006-01-03

2006-01-03

Patel, Kanjibhai (Department: 2625)

Image analysis

Applications

Manufacturing or product inspection

C382S172000, C382S275000, C345S055000, C324S701000

Reexamination Certificate

active

06983067

ABSTRACT:
A method of testing functionality of a LCD device (5) in a mobile telephone handset (MS1), involves applying first and second test patterns to electrodes (17, 18) of the device (5) and capturing image data corresponding to the display produced, using a camera (11). A processor (12) compares the image data for the first and second test patterns, for each display element of the device (5). The first and second patterns are arranged so that each element is switched on and off. When the data from the first and second patterns is compared, functional elements provide relatively high value resultant data (r), whereas non-functional data do not. The resultant data (r) is summed by row and column and compared with a threshold to detect fault conditions.

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