Display device test procedure and apparatus
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United States of America Patent
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Nov 18, 2003
Grant Date -
Feb 27, 2003
app pub date -
Aug 22, 2001
filing date -
Aug 22, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A test method (80) for testing a reflective LCD array (10) and apparatus including a mirror read pass transistor (45). In the reflective LCD array (10) has a plurality of system cells (36), wherein data is written to a mirror (33). A measurement device (76) which, in one embodiment is a mirror read pass transistor (45) allows read back of voltage on the mirror (33), thereby providing a measurable criteria for determining if the mirror (33) a mirror electrical contact (43) and associated driving circuitry such as a master cell (40), a slave cell (41) and an analog mux (42) are properly connected and functioning.
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