Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2005-05-17
2005-05-17
Mengistu, Amare (Department: 2673)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S089000
Reexamination Certificate
active
06894668
ABSTRACT:
A driving scheme for chiral nematic (cholesteric) liquid crystal displays comprises a preparation step, a holding-selection step, and an evolution step. The column and row drivers require only 2 voltage levels: U or 0. Duty cycles and phases in the preparation step, the holding-selection step, and the evolution step, are varied to generate optimized contrast, brightness, and gray levels on cholesteric liquid crystal displays.
REFERENCES:
patent: 4435047 (1984-03-01), Fergason
patent: 5251048 (1993-10-01), Doane et al.
patent: 5437811 (1995-08-01), Doane et al.
patent: 5503952 (1996-04-01), Suzuki et al.
patent: 5644330 (1997-07-01), Catchpole et al.
patent: 5748277 (1998-05-01), Huang et al.
patent: 6154190 (2000-11-01), Yang et al.
patent: 6198466 (2001-03-01), Morich et al.
patent: 6268840 (2001-07-01), Huang
patent: 6518944 (2003-02-01), Doane et al.
patent: 20020186182 (2002-12-01), Stephenson et al.
patent: 20030122758 (2003-07-01), Lee et al.
patent: 20030169221 (2003-09-01), Stephenson et al.
patent: 20040125056 (2004-07-01), Mi
A. Rybalochka et al. (Dynamic Drive Scheme for Fast Addressing of Cholesteric Displays, SID 2000, pp. 818-821).
A. Kozachenko et al. (Hysteresis as a Key Factor for the Fast Control of Reflectivity in Cholesteric LCDs, Institute of Semiconductor Physics, Pr. Nauki 45, 252650, Kyiv, Ukraine, SID 97 Digest, pp. 148-151).
X.-Y. Huang et al.,22.3: Dynamic Drive for Bistable Reflective Cholesteric Displays: A Rapid Addressing Scheme, SID 95 Digest, pp. 347-350.
X.-Y. Huang et al., 36.3: Unipolar Implementation for the Dynamic Drive Scheme of Bistable Reflective Cholesteric Displays, SID 97 Digest, pp. 899-9022.
V. Sorokin (Simple Driving Methods for Cholesteric Reflective LCDs, Asia Display 1998, pp. 749-752).
X.-Y. Huang et al., High-Performance Dynamic Drive Scheme for Bistable Reflective Cholesteric Displays, SID 96 Digest, pp. 359-362.
Y.-M. Zhu et al., 9.1: High-Speed Dynamic Drive Scheme for Bistable Reflective Cholesteric Displays, SID 97 Digest, pp. 97-100.
A. Rybalochka et al. (Simple Drive scheme for Bistable Cholesteric LCDs, SID 2001, pp. 882-885).
Mi Xiang-Dong
Stephenson Stanley W.
LandOfFree
General 2 voltage levels driving scheme for cholesterical... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with General 2 voltage levels driving scheme for cholesterical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and General 2 voltage levels driving scheme for cholesterical... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3373898