Spatial light modulator having redundant memory cells

Details Spatial light modulator having redundant memory cells Spatial light modulator having redundant memory cells

1995-02-28

1997-09-23

Faile, Andrew

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

365200, G09G 334

Patent

active

056709765

ABSTRACT:
A spatial light modulator (10) of the DMD type having an array of memory cells (16) controlling an array of pixels (12). The memory cell array (16) has several integral, interleaved spare rows of memory cells MR (R1), MR (R2), and MR (R3), which can be selectively utilized to replace a defective row of primary memory cells. A fused row address mapping logic circuit (40) includes a network of fuses (F0-F12) and controls the implementation of memory cells, as well as the mapping of address signals to the memory cells as a function of inputs (R0-R11) received from a row decoder circuit (20). This circuit (40) is transparent to the row address decoder circuit (20). The present invention is suitable for large spatial light modulators compatible with high definition television (HDTV). High yield devices can be obtained with the present invention.

REFERENCES:
patent: 5061049 (1991-10-01), Hornbeck
patent: 5079544 (1992-01-01), DeMond et al.
patent: 5105369 (1992-04-01), Nelson
patent: 5278652 (1994-01-01), Urbanus
patent: 5471427 (1995-11-01), Muzakami et al.

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