Thin-Film Bucket Brigade Device Charge-Transfer Efficiency Improvements for Display Applications.
Final rept. 15 Mar-14 Nov 77,
AEROJET ELECTROSYSTEMS CO AZUSA CALIF
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Aerojets approach to improving the charge-transfer efficiency CTE of bucket-brigade devices BBD for flat panel display applications is described. The task entailed studying candidate BBD configurations, making tradeoff analyses, determining factors which affect BBD CTE efficiency and analyzing display-to-cell interface circuit considerations. Recovery from initial setback in optimizing interface circuitry between BBD and classic active matrix forced an innovative approach involving a new class of active matrix cascode circuit to avoid requirement for high-voltage BBDs with their attendant loss of transconductance. It is concluded that full TV format display addressing can be achieved with the 99.7 BB CTE attained. This is possible with the new matrix control architecture developed for achieving the required high yield. A program for the design, construction, assembly, and testing of flat-panel displays is recommended as a means of demonstrating the matrix control concept developed. Efforts to further improve the CTE of the BBD are also recommended. Author
- Electrical and Electronic Equipment