Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1993-02-01
1994-05-24
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
257444, H01J 4014
Patent
active
053151011
ABSTRACT:
A large area active matrix array (2) is manufactured by providing four substrates (1) each carrying a sub-array (21) having an active area (11) comprising a matrix of switching elements (30) and associated row and column conductors (41) and (42) for enabling addressing of individual switching elements (30). The row and column conductors (41) and (42) terminate in respective connecting leads (41a and 42a) extending beyond the active area (11). A portion (1a) of each substrate (1) and the connecting leads carried is removed so as to form a new substrate edge (1'a) adjacent each of two adjoining edges of the active area (11) and the substrates (1) are mounted onto a support (12) so that each new substrate edge is adjacent another new substrate edge (1'a) to form the large area array (2), thereby allowing the same pixel pitch to be maintained across the array (2). Each sub-array (2') may be fully tested before completion of the array (2) which should allow higher yields.
REFERENCES:
patent: 4832457 (1989-05-01), Saitoh et al.
patent: 4866291 (1989-09-01), Shimada et al.
patent: 5070236 (1991-12-01), Miyake
patent: 5184018 (1993-02-01), Conrads et al.
Hughes John R.
Powell Martin J.
Kraus Robert J.
Nelms David C.
Shami K.
U.S. Philips Corporation
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