US4808990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display assembly
Assignee: Sharp Corp
•
Filing: 1984-11-09
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Granted: 1989-02-28
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Expires: 2004-11-09
Abstract
Abstract A liquid crystal display unit integrally assembling both the liquid crystal elements and the drive circuit boards that drive the liquid crystal elements. In particular, the liquid crystal display unit has a configuration wherein the liquid crystal cell is connected to the drive circuit board through a flexible printed circuit board, and the drive circuit board and the liquid crystal cell are structured to sandwich a chassis so that all the elements thereof are integrally assembled together therebetween into a single unit by employing an angle that covers the elements from the front surface of the liquid crystal cell.
Inventors
- 👤 Koshi Kamigaki
- 👤 Toshimichi Katsube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:42
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345; G02F1/13452; Y; Y10; Y10S; Y10S345/00; Y10S345/905
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
88 words
A liquid crystal display assembly which comprises a liquid crystal cell, at least two drive circuit boards, at least two flexible printed circuit boards, each of said of flexible printed circuit boards providing electrical connection between the liquid crystal cell and one end of each of said drive circuit boards, and a chassis sandwiched between the liquid crystal cell and the drive circuit boards, through the flexible nature of the printed circuit boards, the other end of each of said drive circuit boards being fixed to said chassis.
Claim 2
Dependent Claim
88 words
A liquid crystal display assembly which comprises a liquid crystal cell, at least two drive circuit boards, at least two flexible printed circuit boards, each of said of flexible printed circuit boards providing electrical connection between the liquid crystal cell and one end of each of said drive circuit boards, and a chassis sandwiched between the liquid crystal cell and the drive circuit boards, through the flexible nature of the printed circuit boards, the other end of each of said drive circuit boards being fixed to said chassis.
Claim 3
Dependent Claim
39 words
The liquid crystal display assembly according to claim 1, containing a plurality of drive circuit boards, wherein projections are provided on the chassis and the edge portions of the drive circuit board engage with the projections on the chassis.
Claim 4
Dependent Claim
36 words
The liquid crystal display assembly according to claim 2 wherein at least one connector pin is disposed on the chassis which causes the plurality of the drive circuit boards to be electrically connected to each other.
Claim 5
Dependent Claim
43 words
The liquid crystal display assembly according to claim 2 wherein the chassis is provided with a plurality of through-holes which permit communication between the components of the drive circuit board on one side of the chassis to components on the other side thereof.
Claim 6
Dependent Claim
22 words
The liquid crystal display assembly of claim 1 wherein the chassis contains corner projections which are secured to the drive circuit boards.
Claim 7
Dependent Claim
42 words
The liquid crystal display assembly of claim 5 wherein a linear projection is formed in the center of the chassis, said linear projection containing grooves, and a connector pin is disposed in each of said grooves for connecting said drive circuit boards.
Claim 8
Dependent Claim
53 words
The liquid crystal display assembly of claim 5 wherein a linear projection is formed in the center of the chassis, a portion of the linear projection being cut out and a connector pin containing a plurality of electrical connector arms are disposed in said cut out for connecting with said drive circuit boards.
Claim 9
Dependent Claim
34 words
The liquid crystal display assembly of claim 1 wherein at least one stationary single member is provided for securing the drive circuit boards to the liquid crystal cells, with said chassis being disposed therebetween.
Claim 10
Dependent Claim
36 words
The liquid crystal display assembly of claim 8 wherein at least one connector pin is installed in the center of the chassis for electrically connecting the drive circuit boards at the position of the stationary angle.
Claim 11
Dependent Claim
29 words
The liquid crystal display assembly of claim 1 wherein shaped projections are operatively associated with said chassis for engaging each of said other ends of said drive circuit boards.
Claim 12
Dependent Claim
15 words
The crystal display assembly of claim 10 wherein said shaped projections have a T-shaped configuration.
Claim 13
Dependent Claim
20 words
The liquid crystal display assembly of claim 11 wherein the shaped projections are disposed at the center of the chassis.
Claim 14
Dependent Claim
20 words
The liquid crystal display assembly of claim 1 wherein the shaped projections mechanically and electrically connect the drive circuit boards.
Claim 15
Dependent Claim
22 words
The liquid crystal display assembly of claim 1 wherein recessed areas are provided in the chassis for receiving the drive circuit boards.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |