Liquid crystal cells – elements and systems – With specified nonchemical characteristic of liquid crystal... – Within smectic phase
Reexamination Certificate
2005-08-02
2005-08-02
Kim, Robert H. (Department: 2871)
Liquid crystal cells, elements and systems
With specified nonchemical characteristic of liquid crystal...
Within smectic phase
C349S086000, C349S165000, C349S172000, C349S175000, C349S185000
Reexamination Certificate
active
06924873
ABSTRACT:
The objective of the present invention is to provide a liquid crystal display device for displaying colors by transmission and reflection modes and a method for producing such devices, whereby the additive color mixing can be used, the structure is simplified, the driving-voltage is lower, the contrast is higher, the response speed is higher, and the screen can be larger. This objective can be achieved by a method including the following steps: mixing 0.001 to 20 wt % of dichromatic melanotic pigment into chiral nematic liquid crystal mixed with chiral dopant; preparing a mixture of the liquid crystal and prepolymer to be polymerized into transparent polymeric solid; inserting the mixture into the space between two conductive substrates, wherein at least one of which is transparent; and irradiating ultra-violet light or neighboring short-wavelength light onto the mixture. This process creates an accumulation of small packets composed of the liquid crystal packed with a thin film of the transparent polymeric solid within a light-controlling layer between the two conductive substrates. When no voltage is applied, the pigment molecules absorb light because they are distributed within the space with their longitudinal axis randomly directed. When a voltage is applied, elongated liquid crystal molecules are oriented perpendicular to the substrates, and the pigment molecules are also oriented in a similar manner. In this state, the black color of the pigment molecules does not appear, so that light is allowed to pass therethrough.
REFERENCES:
patent: 5574593 (1996-11-01), Wakita et al.
patent: 6203723 (2001-03-01), Hsu
patent: A 05-88150 (1993-04-01), None
patent: A 06-194633 (1994-07-01), None
patent: A 09-318977 (1997-12-01), None
patent: B2 3030973 (2000-02-01), None
T. Asada et al., “Spatial Light modulator by Using Polymer Cell-Wall Type Liquid Crystal Optical Shutter”, Mol. Cryst. Liq. Cryst., 1996 vol. 282, pp. 355-363.
Asada Tadahiro
Kim Robert H.
Nguyen (Nancy) Thanh-Nhan P
Oliff & Berridg,e PLC
LandOfFree
Liquid crystal display device and its production method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid crystal display device and its production method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display device and its production method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3448263