Liquid crystal display apparatus and liquid crystal display panel of the reflective type

Assignee: Hitachi Ltd

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Filing: 1992-03-17

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Granted: —

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Expires: 2012-03-17

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Abstract

Abstract According to the present invention the liquid crystal display apparatus comprises a pair of substrates; a liquid crystal layer interposed between said pair of substrate; one of said pair of substrates is a monocrystalline semiconductor substrate having; (a) a display area (131) having a plurality of pixel electrodes disposed in a matrix and a plurality of transistors, each of said transistors being connected to a corresponding one of said plurality of pixel electrodes; (b) a peripheral circuit area (132) to drive said display area having scanning driving circuit and a signal driving circuit; (c) a frame memory (133) which stores display information provided to said signal driving circuit; and (d) a controller (134) which control said frame memory (133) and an other substrate of said pair of substrates being a transparent substrate having transparent counter electrode for transparent substrate includes transparent counter electrode for selectively applying a voltage to said liquid crystal layer together with said pixel electrodes.

Inventors

👤 Yoshiharu Nagae
👤 Yuji Mori
👤 Yoshiro Mikami
👤 Hideo Sato
👤 Minoru Hoshino
👤 Kyohei Fukuda

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-11-09 14:27

CPC Classifications

G; G02; G02F; G02F1/00; G02F1/01; G02F1/015; H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105; H04N9/312; H04N9/3141; H04N9/315; H04N9/3155; H04N9/3179; H04N5/00; H04N5/74; H04N5/7416; H04N5/7441

Claims Analysis

Total Claims: 4

Claim 1

Independent Claim 153 words

A liquid crystal display apparatus comprising a pair of substrates; a liquid crystal layer interposed between said pair of substrate; one of said pair of substrates is a monocrystalline semiconductor substrate having; (a) a display area (131) having a plurality of pixel electrodes disposed in a matrix and a plurality of transistors, each of said transistors being connected to a corresponding one of said plurality of pixel electrodes; (b) a peripheral circuit area (132) to drive said display area having scanning driving circuit and a signal driving circuit; (c) a frame memory (133) which stores display information provided to said signal driving circuit; and (d) a controller (134) which control said frame memory (133) and an other substrate of said pair of substrates being a transparent substrate having transparent counter electrode for transparent substrate includes transparent counter electrode for selectively applying a voltage to said liquid crystal layer together with said pixel electrodes.

Claim 2

Dependent Claim 61 words

A liquid crystal display apparatus according to claim 1, wherein said display area includes a plurality of row electrodes, each of said row electrodes being connected to a corresponding one gates of said plurality of transistors and a plurality of column electrodes, each of said column electrodes being connected to a corresponding one of main electrodes of said plurality of transistors.

Claim 3

Dependent Claim 37 words

A liquid crystal display apparatus according to claim 2, wherein said scanning driving circuit applies time-sequentially a voltage pulse to said row electrodes and said signal driving circuit applies time-sequentially a image signal to said column electrodes.

Claim 4

Dependent Claim 199 words

A liquid crystal display panel of a reflective type, for selectively reflecting incident light in units of pixels in response to electric signals inputted thereto, comprising: a monocrystalline semiconductor substrate having; (a) a display area having a transistor provided for each pixel thereon, said transistor changing a conductivity state thereof in response to a corresponding electric signal, and having a pixel electrode provided for each pixel and being connected to said transistors, said pixel electrode selectively reflecting incident light in connection with a chance in the conductive state of said transistor; (b) a peripheral circuit area to drive said display area having scanning driving circuit and a signal driving circuit; (c) a frame memory which stores display information provided to said signal driving circuit; and (d) a controller which control said frame memory; and a liquid crystal layer; a transparent substrate having at least one transparent counter electrode thereon, said liquid crystal layer being sandwiched by said pixel electrode and said at least one counter electrode, said at least one transparent counter electrode applying selectively a voltage to said liquid crystal layer together with said pixel electrodes in accordance with a change in the conductive state of said transistor.

References Cited (Backward Citations)

US3862360A Cited

US4239346A Cited

JPS6126027A Cited

US4745485A Cited

WO1988007250A2 Cited

EP0294899A2 Cited

EP0342925A2 Cited

WO1991002372A1 Cited

WO1991003003A1 Cited

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