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EP0167368A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid crystal display device

Assignee: Nippon Seiki Co Ltd
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Filing: 1985-06-28
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Granted: —
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Expires: 2005-06-28
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Abstract

Abstract The present invention provides a liquid crystal display device (3) comprising: a box-shaped securing member (6) having a penetrating portion (6a) at a peripheral portion thereof and serving as a foundation piece for assembly of the device; an illuminating member (12) arranged on one side of said securing member (6); a liquid crystal element (a), disposed in layered relationship on said illuminating member (12), in which the directions of arrangement of the molecules of the liquid crystal (32) vary in response to the application of signal potentials for controlling transmission of light to effect indication a holding member (8), disposed on the side of said liquid crystal element (9) remote from said securing member (6), for holding said liquid crystal element (9) on said securing member (6); a circuit board (17), on which is provided a drive circuit (20) for outputting signal potentials for controlling said liquid crystal element (9), said circuit board (17) being disposed on the side of said securing member (6) remote from said liquid crystal element (9); and a conducting member (23) located in said penetrating portion (6a) of said securing member (6) said circuit board (17) and holding member (8) being secured to said securing member (6) so that said conducting member (23) establishes electrical connection between said liquid crystal element (9) and said circuit board (17)

Inventors

  • 👤 Isao Yasuhara
  • 👤 Norihiro Tamura

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-27 05:04
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133602; G02F1/133608; B; B60; B60Q; B60Q3/00; B60Q3/10; B60Q3/14; G02F1/133308; G02F1/133317; G02F1/133604; G02F2201/00; G02F2201/46; G02F2201/465

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 218 words
A liquid crystal display device (3) comprising: a box-shaped securing member (6) having a penetrating portion (6a) at a peripheral portion thereof and serving as a foundation piece for assembly of the device; an illuminating member (12) arranged on one side of said securing member (6); a liquid crystal element (a), disposed in layered relationship on said illuminating member (12), in which the directions of arrangement of the molecules of the liquid crystal (32) vary in response to the application of signal potentials for controlling transmission of light to effect indication a holding member (8), disposed on the side of said liquid crystal element (9) remote from said securing member (6), for holding said liquid crystal element (9) on said securing member (6); a circuit board (17), on which is provided a drive circuit (15) for outputting signal potentials for controlling said liquid crystal element (9), said circuit board (17) being disposed on the side of said securing member (6) remote from said liquid crystal element (9); and a conducting member (23) located in said penetrating portion (6a) of said securing member (6) said circuit board (17) and holding member (8) being secured to said securing member (6) so that said conducting member (23) establishes electrical connection between said liquid crystal element (9) and said circuit board (17)
Claim 2
Dependent Claim 218 words
A liquid crystal display device (3) comprising: a box-shaped securing member (6) having a penetrating portion (6a) at a peripheral portion thereof and serving as a foundation piece for assembly of the device; an illuminating member (12) arranged on one side of said securing member (6); a liquid crystal element (a), disposed in layered relationship on said illuminating member (12), in which the directions of arrangement of the molecules of the liquid crystal (32) vary in response to the application of signal potentials for controlling transmission of light to effect indication a holding member (8), disposed on the side of said liquid crystal element (9) remote from said securing member (6), for holding said liquid crystal element (9) on said securing member (6); a circuit board (17), on which is provided a drive circuit (15) for outputting signal potentials for controlling said liquid crystal element (9), said circuit board (17) being disposed on the side of said securing member (6) remote from said liquid crystal element (9); and a conducting member (23) located in said penetrating portion (6a) of said securing member (6) said circuit board (17) and holding member (8) being secured to said securing member (6) so that said conducting member (23) establishes electrical connection between said liquid crystal element (9) and said circuit board (17)
Claim 3
Dependent Claim 75 words
A liquid crystal display device (3) according to claim 1, wherein said illuminating member (12) is a light transmissive member in the form of a flat plate which takes in light from a light source (16) provided on said circuit board (17) through a light intake portion (12a) provided at least at a portion of a side face of said light transmissive member (12) and which transmits the light to said liquid crystal element (9).
Claim 4
Dependent Claim 72 words
A liquid crystal display device (3) according to claim 2, wherein said securing member (6) serves as a foundation piece for said light transmissive member (12) and said light source (16) so that when said light transmissive member (12) and said circuit board (17) are disposed on said securing member (6), a light emitting portion of said light source (16) opposes the light intake portion (12a) of said light transmissive member (12)
Claim 5
Dependent Claim 111 words
A liquid crystal display device according to claim 2 or 3, wherein said light transmissive member (12) is positioned by said securing member (6) and a heat radiating member (13) located on the face of said securing member (6) remote from said circuit board (17), the heat radiating member (13) covering the face of said light transmissive member (12) remote from said light source (16), said heat radiating member (13) having portions of a region thereof which covers said face of said light transmissive member (12) cut away in correspondence with indicating portions of said liquid crystal element (9) while another portion thereof is exposed outwardly of said securing member (6).
Claim 6
Dependent Claim 51 words
A liquid crystal display device according to claim 4, wherein said heat radiating member (13) has disposed on the face thereof remote from said light source (16) a heat insulating member (11) which is cut away at portions thereof in correspondence with the indicating portions of said liquid crystal element (9).
Claim 7
Dependent Claim 56 words
A liquid crystal display device according to any one of claims 1 to 5, which further comprises a semitransmissive reflecting plate (10) located on the face of said liquid crystal element (9) adjacent said securing element (6) and including a filter element which is colored corresponding to the indicating portions of said liquid crystal element (9).
Claim 8
Dependent Claim 32 words
A liquid crystal display device according to any one of claims 1 to 6, wherein said penetrating portion (6a) is a through-hole formed at a peripheral portion of said securing member (6).

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