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1. (WO1998050804) DYNAMIC DRIVE METHODS AND APPARATUS FOR A BISTABLE LIQUID CRYSTAL DISPLAY
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/050804 International Application No.: PCT/US1998/009259
Publication Date: 12.11.1998 International Filing Date: 06.05.1998
IPC:
G09G 3/36 (2006.01)
G PHYSICS
09
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20
for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
34
by control of light from an independent source
36
using liquid crystals
Applicants:
KENT STATE UNIVERSITY [US/US]; East Main and Lincoln Streets Kent, OH 44242, US
Inventors:
YANG, Deng-Ke; US
ZHU, Yang-Ming; US
HUANG, Xiao-Yang; US
Agent:
WEBER, Ray, L. ; Renner, Kenner, Greive, Bobak, Taylor & Weber 1610 First National Tower Akron, OH 44308-1456, US
Priority Data:
08/852,31907.05.1997US
Title (EN) DYNAMIC DRIVE METHODS AND APPARATUS FOR A BISTABLE LIQUID CRYSTAL DISPLAY
(FR) PROCEDES D'EXCITATION DYNAMIQUE ET APPAREIL POUR UN ECRAN A CRISTAUX LIQUIDES BISTABLE
Abstract:
(EN) A flat-panel liquid crystal display (10). The display includes a flat sheet of bistable chiral nematic liquid crystal material activated by a drive circuit that individually controls the display state of multiple picture elements. The driver circuitry activates the liquid crystal domains with various drive schemes which have any number of different phases (300, 312, 318, and 320) to attain various addressing sequence times. At the end of each drive scheme, the texture of the liquid crystal material is allowed to provide either focal conic or twisted planar end states (320) across the two-dimensional array of picture elements. Each drive scheme employs at least a preparation phase (300) and a selection phase (318) to predispose the liquid crystal material to one of the end states.
(FR) Ecran plat à cristaux liquides qui comporte une feuille plate d'une matière à cristaux liquides nématiques chirale bistable activée par un circuit d'excitation qui commande individuellement l'état d'affichage d'élément d'image multiples. Le circuit d'excitation active les domaines de cristaux liquides à l'aide de divers processus d'excitation qui présentent un certain nombre de phases différentes pour parvenir à divers moments de séquence d'adressage. A la fin de chaque processus d'excitation, la texture de la matière à cristaux liquides peut prendre des états finaux qui sont soit coniques focaux, soit plans torsadés, sur l'ensemble à deux dimensions des éléments d'image. Chaque processus d'excitation comporte au moins une phase de préparation et une phase de sélection de manière à prédisposer la matière à cristaux liquides pour qu'elle adopte l'un des états finaux.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
KR1020000022562EP0954841JP2000514932 CN1231048AU1998072911