EP0437328A2
Expired / Lapsed
EP
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Reflective-type liquid crystal display device
Assignee: Panasonic Holdings Corp
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Filing: 1991-01-04
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Granted: —
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Expires: 2011-01-04
Abstract
Abstract An active matrix liquid crystal display device employing a thin film transistor (TFT) system is provided in which a semiconductor (14) of each TFT which is smaller in width than a gate bus electrode (1) is arranged on the gate bus electrode, and a drain electrode (10b) of the TFT is formed as a refelective pixel electrode providing a light diffusion effect.
Inventors
- 👤 Hiroshi Iwai
- 👤 Yoneharu Takubo
- 👤 Sadayoshi Hotta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 13:35
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/136209; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133512; G02F1/136213; G02F2202/00; G02F2202/10; G02F2202/103
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
An active matrix liquid crystal display device employing thin film transistors as switching elements, said liquid crystal display device comprising: a matrix TFT array substrate arranged such that a semiconductor layer of each thin film transistor which is smaller in width than a gate bus electrode is provided on a bus extension of the gate bus electrode and also, a corresponding pixel electrode electrically connected to a drain electrode of the thin film transistor is formed of a light reflective material; an opposite substrate having a transparent common electrode arranged on a transparent insulating substrate thereof and black stripes provided for defining a boundary between two adjacent pixels; and a liquid crystal layer sandwiched between the matrix TFT array substrate and the opposite substrate.
Claim 2
Dependent Claim
22 words
A reflective-type liquid crystal display device according to Claim 1, wherein a plurality of thin film transistors are provided for each pixel.
Claim 3
Dependent Claim
27 words
A reflective-type liquid crystal display device according to Claim 2, wherein the thin film transistors provided for each pixel are coupled to different gate bus electrodes respectively.
Claim 4
Dependent Claim
27 words
A reflective-type liquid crystal display device according to Claim 2, wherein the thin film transistors provided for each pixel are coupled to different source bus electrodes respectively.
Claim 5
Dependent Claim
18 words
A reflective-type liquid crystal display device according to Claim 1, wherein each display pixel contains an auxiliary capacitor.
Claim 6
Dependent Claim
30 words
A reflective-type liquid crystal display device according to Claim 5, wherein the auxiliary capacitor comprises a reflective pixel electrode and a common electrode provided in the matrix TFT array substrate.
Claim 7
Dependent Claim
19 words
A reflective-type liquid crystal display device according to Claim 1, wherein the pixel electrode is a light diffusing plate.
References Cited (Backward Citations)
No citation records indexed.
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