EP0140350A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid crystal panel display device

Assignee: Hitachi Ltd

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Filing: 1984-10-26

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Granted: —

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Expires: 2004-10-26

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Abstract

Abstract A liquid crystal panel device comprises a liquid crystal panel (1, 11) having a relatively large area particularly while in use with an automobile dashboard and having a plurality of display sections (1a), a diffusion plate (5, 12) disposed opposing the rear face of the liquid crystal panel for diffusing receiving light rays, a printed circuit board (2, 14) disposed opposing the rear face of the diffusion plate, and a plurality of light emitting members (4,13) disposed in equally spaced relation to each other on the printed circuit board over the whole region of the liquid crystal panel. A reflection plate is provided between the diffusion plate and the board, and a partition plate corresponding to the display section (1a) of the liquid crystal panel is provided. Within a space defined by the diffusion plate, board, reflection plate, and partition plate, the light emitting members consisting of three or four incandescent lamps are disposed.

Inventors

👤 Mitsuhiro Masuda
👤 Osamu Igarashi
👤 Keiichi Tokuyama
👤 Kozo Katogi

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-11-06 11:04

CPC Classifications

G; G02; G02B; G02B1/00; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133602; G02F1/133604; G02F1/133608; G09; G09F; G09F9/00; G09F9/30; G09F9/35; H; H05; H05K; H05K3/00; H05K3/30; H05K3/301; G02F1/133606

Claims Analysis

Total Claims: 8

Claim 1

Independent Claim 88 words

A liquid crystal panel display device comprising: a liquid crystal panel (1, 11) having a relatively large area and having at least two display blocks (la); a diffusion plate (5, 12) disposed opposing the rear face of said liquid crystal panel for diffusing receiving light rays; a board (2, 14) disposed opposing the rear face of said diffusion plate; and a plurality of light emitting members (4, 13) disposed in equally spaced relation to each other on said board over the whole region of said liquid crystal panel.

Claim 2

Dependent Claim 88 words

Claim 3

Dependent Claim 41 words

A liquid crystal panel display device according to claim 1, further comprising a reflection plate (3, 15) disposed between said diffusion plate and said board for partitioning spaces corresponding to respective said plurality of display blocks of said liquid crystal panel.

Claim 4

Dependent Claim 38 words

A liquid crystal panel display device according to claim 2, wherein said plurality of light emitting members are disposed side by side in equally spaced relation to each other within a space partitioned by said partitioning reflection plate.

Claim 5

Dependent Claim 33 words

A liquid crystal panel display device according to claim 3, wherein said plurality of light emitting members are disposed perpendicularly to a longitudinal direction of a space partitioned by said partitioning reflection plate.

Claim 6

Dependent Claim 22 words

A liquid crystal panel display device according to claim 4, wherein the number of said light emitting members is at least three.

Claim 7

Dependent Claim 19 words

A liquid crystal panel display device according to claim 1, wherein said light emitting member comprises an incandescent lamp.

Claim 8

Dependent Claim 31 words

A liquid crystal panel display device according to claim 1, wherein said board comprises a printed circuit board, one of the surfaces thereof opposing said liquid crystal panel being colored white.

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