US4945349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display
Assignee: Mitsubishi Electric Corp
•
Filing: 1988-09-07
•
Granted: 1990-07-31
•
Expires: 2008-09-07
Abstract
Abstract In a liquid crystal display, a shade frame (9) is provided between a light source (1) and a filter (41) in order to shade heat coming from the light source (1) toward the filter (41).
Inventors
- 👤 Yukiharu Sanai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:34
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133308; G02F1/1335; G02F1/133509; G09; G09F; G09F9/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
A liquid crystal display comprising: a liquid crystal display board; a light guide which is disposed at a rear side of said liquid crystal display board; a light source which is disposed at said rear side of the liquid crystal display board; a filter which is disposed between said liquid crystal display board and said light guide; shade means which is of high thermal conductivity and is disposed between said light source and said filter for selectively shading heat coming from said light source toward said filter; and at least one case which covers said liquid crystal display board, said light guide, said light source, said filter and said shade means therewith, said case having an opening to show said liquid crystal display board therethrough.
Claim 2
Dependent Claim
125 words
A liquid crystal display comprising: a liquid crystal display board; a light guide which is disposed at a rear side of said liquid crystal display board; a light source which is disposed at said rear side of the liquid crystal display board; a filter which is disposed between said liquid crystal display board and said light guide; shade means which is of high thermal conductivity and is disposed between said light source and said filter for selectively shading heat coming from said light source toward said filter; and at least one case which covers said liquid crystal display board, said light guide, said light source, said filter and said shade means therewith, said case having an opening to show said liquid crystal display board therethrough.
Claim 3
Dependent Claim
59 words
A liquid crystal display in accordance with claim 1, wherein said shade means is formed into a frame-shaped configuration which has an opening for passing light coming from said light source through said light guide at a center part thereof and a cut-off part for passing a lead of said liquid crystal display board at a circumferential part thereof.
Claim 4
Dependent Claim
21 words
A liquid crystal display in accordance with claim 1, wherein said shade means and said case are made of similar metals.
Claim 5
Dependent Claim
130 words
A liquid crystal display comprising: a liquid crystal display board; a light guide which is disposed at a rear side of said liquid crystal display board; a light source which is disposed at said rear side of the liquid crystal display board; a filter which is disposed between said liquid crystal display board and said light guide; shade means which is of high thermal conductivity and is disposed between said light source and said filter for shading heat coming from said light source toward said filter; a first case which covers said light guide and said light source together with said shade means; and a second case which covers said liquid crystal display board and said filter, said second case having an opening to show said liquid crystal display board.
Claim 6
Dependent Claim
130 words
A liquid crystal display comprising: a liquid crystal display board; a light guide which is disposed at a rear side of said liquid crystal display board; a light source which is disposed at said rear side of the liquid crystal display board; a filter which is disposed between said liquid crystal display board and said light guide; shade means which is of high thermal conductivity and is disposed between said light source and said filter for shading heat coming from said light source toward said filter; a first case which covers said light guide and said light source together with said shade means; and a second case which covers said liquid crystal display board and said filter, said second case having an opening to show said liquid crystal display board.
Claim 7
Dependent Claim
25 words
A liquid crystal display in accordance with claim 4, wherein said shade means, said first case and said second case are made of similar metals.
Claim 8
Dependent Claim
19 words
A liquid crystal display in accordance with claim 4, wherein said second case is fixed to said first case.
Claim 9
Dependent Claim
133 words
A liquid crystal display comprising: a liquid crystal display board; a light guide which is disposed at a rear side of said liquid crystal display board; a light source which is disposed at said rear side of the liquid crystal display board; a filter which is disposed between said liquid crystal display board and said light guide; a first case which is of high thermal conductivity and has a shade frame formed integrally therewith and covers said light guide and said light source, said shade frame being disposed between said light source and said filter for shading heat coming from said light source toward said filter; and a second case which covers said liquid crystal display board and said filter, said second case having an opening to show said liquid crystal display board.
Claim 10
Dependent Claim
133 words
A liquid crystal display comprising: a liquid crystal display board; a light guide which is disposed at a rear side of said liquid crystal display board; a light source which is disposed at said rear side of the liquid crystal display board; a filter which is disposed between said liquid crystal display board and said light guide; a first case which is of high thermal conductivity and has a shade frame formed integrally therewith and covers said light guide and said light source, said shade frame being disposed between said light source and said filter for shading heat coming from said light source toward said filter; and a second case which covers said liquid crystal display board and said filter, said second case having an opening to show said liquid crystal display board.
Claim 11
Dependent Claim
22 words
A liquid crystal display in accordance with claim 7, wherein said first case and said second case are made of similar metals.
Claim 12
Dependent Claim
19 words
A liquid crystal display in accordance with claim 7, wherein said second case is fixed to said first case.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |