Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1990-08-03
1993-04-20
Hjerpe, Richard
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340793, G09G 336
Patent
active
052046591
ABSTRACT:
A liquid crystal display is described that includes gray scale capability. Each pixel of the display is subdivided into a plurality of subpixels. Each subpixel has coupled thereto a thin film transistor, the thin film transistor coupled to the effective subpixel capacitor. The liquid crystal material is contained between the effective capacitor plates. The voltage applied to the effective capacitor resulting from current flowing through the thin film transistor controls the optical activity of the subpixel. By controlling parameters associated with the thin transistor and by controlling the voltage applied to the pixel (and the subpixel thin film transistors), the optical properties of the subpixel can be controlled as a result of the charge applied across the effective capacitor to provide an angular independent gray scale for the pixel.
REFERENCES:
patent: 3647958 (1972-03-01), Sobel
patent: 4651148 (1987-03-01), Takeda et al.
patent: 4655550 (1987-04-01), Crossland et al.
patent: 4661809 (1987-04-01), Anderson et al.
patent: 4712877 (1987-12-01), Okada et al.
patent: 4743096 (1988-05-01), Wakai et al.
patent: 4747671 (1988-05-01), Takahashi et al.
patent: 4761058 (1988-08-01), Okubo et al.
patent: 4791417 (1988-12-01), Bobak
Paent Abstract of Japan, vol. 10, No. 41 (P-429) (2098) 18 Feb. 1986.
Patent Abstract of Japan, vol. 11, No. 270 (P-611) (2717) 3 Sep. 1987.
W. W. Holloway, Jr. et al., "Dynamic Scattering by a Nematic Liquid Crystal Where the Applied Electric Field is Normal to the Incident Light", Journal of Applied Physics, vol. 42, No. 13, Dec. 1971, pp. 5395-5399.
Hjerpe Richard
Honeywell Inc.
Shudy Jr. John G.
LandOfFree
Apparatus and method for providing a gray scale in liquid crysta does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for providing a gray scale in liquid crysta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for providing a gray scale in liquid crysta will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1528557