Yu I Feng

US Patent:

54613973, Oct 24, 1995

Filed:

Oct 7, 1993

Appl. No.:

8/133561

Inventors:

Chao Zhang - Santa Clara CA
Yu Feng - Santa Clara CA
Shichao Ge - Santa Clara CA
Jemm Y. Liang - San Jose CA
Hsi-Sheng Chen - Milpitas CA

Assignee:

PanoCorp Display Systems - Sunnyvale CA

International Classification:

G09G 336
G09G 328
G09G 300

US Classification:

345102

Abstract:

A display device containing an LCD light shutter front end to modulate light transmittance and a substantially flat gas discharge back end unit containing multiple gas discharge tunnels. The back end unit contains priming means to allow fast ignition of gas discharge and control means to allow independent discharge control of each discharge tunnel. The control circuit is further simplified to allow a small number of driving signals to control a large number of discharge tunnels. This backlight structure allows color light pulses to be generated in synchronization with the scanning operation of the front end unit. The combined operation of these two units can produce color images through time sequential color mixing principle. Compact and power efficient color display panels can be produced without the use of color filter in the LCD.

US Patent:

53879210, Feb 7, 1995

Filed:

Apr 26, 1993

Appl. No.:

8/052772

Inventors:

Chao Zhang - Santa Clara CA
Yu Feng - Santa Clara CA
Shichao Ge - Santa Clara CA
Jemm Y. Liang - San Jose CA
Hsi-Shang Chen - Milpitas CA

Assignee:

Panocorp Display Systems - Sunnyvale CA

International Classification:

G09G 336
G09G 328
G09G 300

US Classification:

345102

Abstract:

A scanning flat back light source for use with light valve devices such as liquid crystal displays. It is formed by an array of parallel fluorescent tubes with fluorescent layers therein. One end of each tube is provided with an electrode and the other end connected together through a transverse chamber to form a single vacuum unit. When electrical potential is applied across electrodes in two different chambers, the two chambers and the portion of the transverse chamber connecting the two chambers form a fluorescent lamp where gas discharge produces ultraviolet light that causes a fluorescent layer on the inside walls of the tubes to produce single-color or multi-color light. During successive time intervals in the scanning operation, at least one of the tubes which are caused to emit light during one time interval is also causes to emit light during a subsequent time interval so that the charged particles present in such overlapping tube accelerate the gas discharge process during the subsequent time interval. This device is particularly suitable for portable devices such as portable computers and has high brightness and efficiency without excessive power consumption.