EP0399372A2
Expired / Lapsed
EP
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Liquid crystal display
Assignee: Citizen Watch Co Ltd
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Filing: 1990-05-17
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Granted: —
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Expires: 2010-05-17
Abstract
Abstract A liquid crystal display having an LCD cell composed of a common glass, a segment glass and a liquid crystal sealed therebetween. Electrodes are provided on the surfaces of the common glass and the segment glass to form a matrix. Each electrode terminal is connected to a circuit substrate. The circuit substrate is divided into a common circuit substrate (30) and a segment circuit substrate (32). The end portions of these substrates are connected through folded flat cables (34, 36) in the state in which the end portion thereof overlap with the LCD cell. The division of the circuit substrate reduces the total thickness of the display and overlapping arrangement restricts the necessary displaying area to the minimum.
Inventors
- 👤 Masaru Yoshida
- 👤 Yasuhiro Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 01:40
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345; G02F1/13452; H; H05; H05K; H05K1/00; H05K1/02; H05K1/14; H05K3/00; H05K3/36; H05K3/361
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
162 words
A liquid crystal display (hereinunder referred to as "LCD") comprising: an LCD cell including a common glass with common electrodes disposed on the surface thereof in such a manner as to extend to the periphery thereof, a segment glass with segment electrodes disposed on the surface thereof in such a manner as to extend to the periphery thereof, and a liquid crystal held between said common glass and said segment glass; a circuit substrate with display circuit elements mounted thereon which is connected to the electrode terminals of said LCD cell; said circuit substrate being divided into a common circuit substrate and a segment circuit substrate which are connected to the corresponding end portions of said common substrate and said segment substrate, respectively, of said LCD cell by flat cables; and the end portions of said common circuit substrate and said segment circuit substrate overlapping with the end portions of said common glass and said segment glass, respectively, through said flat cables.
Claim 2
Dependent Claim
162 words
A liquid crystal display (hereinunder referred to as "LCD") comprising: an LCD cell including a common glass with common electrodes disposed on the surface thereof in such a manner as to extend to the periphery thereof, a segment glass with segment electrodes disposed on the surface thereof in such a manner as to extend to the periphery thereof, and a liquid crystal held between said common glass and said segment glass; a circuit substrate with display circuit elements mounted thereon which is connected to the electrode terminals of said LCD cell; said circuit substrate being divided into a common circuit substrate and a segment circuit substrate which are connected to the corresponding end portions of said common substrate and said segment substrate, respectively, of said LCD cell by flat cables; and the end portions of said common circuit substrate and said segment circuit substrate overlapping with the end portions of said common glass and said segment glass, respectively, through said flat cables.
Claim 3
Dependent Claim
31 words
An LCD according to Claim 1, wherein said common circuit substrate and said segment circuit substrate are opposed to the electrode terminals of said common glass and said segment glass, respectively.
Claim 4
Dependent Claim
73 words
An LCD according to Claim 2, wherein the length of said segment circuit substrate is set at a value equal to the width of the matrix of said electrode terminals of said segment glass and the length of said common circuit substrate is set at a value equal to the sum of the width of the matrix of said electrode terminals of said common glass and the length of said segment circuit substrate.
Claim 5
Dependent Claim
32 words
An LCD according to Claim 1, wherein each of said common circuit substrate and said segment circuit substrate is composed of a heat-resistant resin substrate plated with copper on both sides thereof.
Claim 6
Dependent Claim
29 words
An LCD according to Claim 4, wherein an LCD driver IC is mounted on the under surface of each of said common circuit substrate and said segment circuit substrate.
Claim 7
Dependent Claim
33 words
An LCD according to Claim 5, wherein said driver IC is mounted on each of said circuit substrates in the form of a bare chip and sealed with a resin after wire bonding.
Claim 8
Dependent Claim
48 words
An LCD according to Claim 4, wherein wirings for input signals and a power source are mounted on the upper surface of each of said circuit substrates and are electrically connected to each of said driver IC's through a through hole formed in each of said circuit substrates.
Claim 9
Dependent Claim
59 words
An LCD according to Claim 1, wherein each of said flat cables is composed of a heat-sealing connector including a printed wiring of silver and graphite provided on a thin plastic polyester film substrate of 25 to 50 µm thick, and a hot-melt adhesive is printed at the electrically connecting portions with said electrode terminals and said circuit substrate.
Claim 10
Dependent Claim
27 words
An LCD according to Claim 1, wherein said common glass of said LCD cell is fixed to the inside of a holder case through a cushion rubber.
Claim 11
Dependent Claim
41 words
An LCD according to Claim 9, wherein an electroluminescence (hereinunder referred to as "EL") plate for a backlight is removably provided at a gap between said holder case and said LCD cell in said holder case formed by said cushion rubber.
Claim 12
Dependent Claim
18 words
An LCD according to Claim 10, wherein said EL plate is fixed to said holder case by screwing.
Claim 13
Dependent Claim
19 words
An LCD according to Claim 9, wherein said common circuit substrate is fixed to said holder case by screwing.
Claim 14
Dependent Claim
74 words
An LCD according to Claim 9, wherein a shield plate for covering said common circuit substrate so as to prevent the external leakage of electromagnetic noise is disposed on the surface of said common circuit substrate such that one end of said shield plate is connected to the grounding terminal of said common circuit substrate, and said common circuit substrate and said shield plate are electrically connected to said holder case through a screw.
Claim 15
Dependent Claim
33 words
An LCD according to Claim 13, wherein said common circuit substrate and said electrode terminals of said common glass are connected to each other by said flat cable which is folded back singly.
Claim 16
Dependent Claim
37 words
An LCD according to Claim 13, wherein a receiver plate is disposed on the said segment circuit substrate, and said segment circuit substrate and said receiver plate are integrally fixed to said holder case through a screw.
Claim 17
Dependent Claim
58 words
An LCD according to Claim 15, wherein one end of said receiver plate is extended to the end portion of said segment glass of said LCD cell, whereby said LCD cell is held by said holder case by said screw and said receiver plate and said holder case are electrically connect with each other through said holder case.
Claim 18
Dependent Claim
35 words
An LCD according to Claim 16, wherein display circuit elements including a segment driving IC are disposed on said segment circuit substrate in such a manner as to face the back surface of said LCD.
Claim 19
Dependent Claim
63 words
An LCD according to Claim 17, wherein said segment circuit substrate and said common circuit substrate are disposed such that said elements mounted on each of said substrates are substantially at the same level with said common glass of said LCD cell, and said electrodes are provided on the same side of each of said circuit substrates on which said elements are mounted.
Claim 20
Dependent Claim
54 words
An LCD according to Claim 18, wherein said electrode terminals of said segment glass and said segment circuit substrate are provided on the respective bottom surface sides, and said electrode terminals are connected to each other by said flat cable which is folded back doubly between said segment glass and said segment circuit substrate.
References Cited (Backward Citations)
No citation records indexed.
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