The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 1997
Filed:
Feb. 28, 1995
Edison H Chiu, Richardson, TX (US);
Shigeki Numaga, Ibaraki-ken, JP;
Takeshi Honzawa, Ibaraki-ken, JP;
Texas Instruments Incorporated, Dallas, TX (US);
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.