Patent US5654779A successfully refreshed from Google Patents.
US5654779A
Expired / Lapsed
US
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Liquid crystal display device having a removable holding member for the light source
Assignee: Mitsubishi Electric Corp
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Filing: 1994-12-29
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Granted: 1997-08-05
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Expires: 2014-12-29
Abstract
Abstract A liquid crystal display device adaptable for various applications is provided which comprises a liquid crystal display panel, lamps, lamp holders respectively holding the lamps, a photoconductive board provided between the lamps, and a frame covering both the lamps and the lamp holders, wherein the photoconductive board comprises an outer photoconductive part fixed to the lamp holders, and an inner photoconductive part held on the rear side thereof by a holding member provided to the frame.
Inventors
- 👤 Tatsuya Nakayama
- 👤 Takanori Takaki
- 👤 Seiki Takahashi
- 👤 Toshio Tobita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:21
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; F; F21; F21S; F21S8/00; G02B; G02B6/00; G02B6/0001; F21Y; F21Y2103/00; G02F2203/00; G02F2203/68; Y; Y10; Y10S; Y10S345/00; Y10S345/905; Y10S385/00; Y10S385/901
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
74 words
A liquid crystal display device comprising: a liquid crystal display panel; lamps; lamp holders holding respective lamps; a light guiding board positioned between the lamps; and a frame supporting the lamp holders, wherein the light guiding board comprises an outer light guiding part fixed to the lamp holders, and an inner light guiding part removably fitting into and securable within the outer light guiding part with a holding member removably mounted to the frame.
Claim 2
Dependent Claim
74 words
A liquid crystal display device comprising: a liquid crystal display panel; lamps; lamp holders holding respective lamps; a light guiding board positioned between the lamps; and a frame supporting the lamp holders, wherein the light guiding board comprises an outer light guiding part fixed to the lamp holders, and an inner light guiding part removably fitting into and securable within the outer light guiding part with a holding member removably mounted to the frame.
Claim 3
Dependent Claim
91 words
The liquid crystal display device according to claim 1 comprising: a diffusing plate disposed on a first side of the inner light guiding part for diffusing light passing through the inner light guiding part; a light scattering part disposed on a second side of the inner light guiding part for directing light from the lamps toward the liquid crystal display panel; and a reflector sheet disposed on the second side of the inner light guiding part for reflecting light from the lamps toward the liquid crystal display panel in a pattern.
Claim 4
Dependent Claim
17 words
The liquid crystal display device according to claim 1 wherein the holding member comprises a leaf spring.
Claim 5
Dependent Claim
17 words
The liquid crystal display device according to claim 1 wherein the holding member comprises a plate spring.
Claim 6
Dependent Claim
98 words
A liquid crystal display device comprising: a liquid crystal display panel; lamps; lamp holders holding respective lamps; a light guiding board positioned between the lamps; and a frame supporting the lamps and the lamp holders, wherein the light guiding board comprises an outer light guiding part fixed to the lamp holders, and an inner light guiding part removably fitted into and securable within the outer light guiding part with a holding member removably mounted to the frame, the light guiding board having first and second surfaces and first and second edges, the first surface being convex or concave.
Claim 7
Dependent Claim
98 words
A liquid crystal display device comprising: a liquid crystal display panel; lamps; lamp holders holding respective lamps; a light guiding board positioned between the lamps; and a frame supporting the lamps and the lamp holders, wherein the light guiding board comprises an outer light guiding part fixed to the lamp holders, and an inner light guiding part removably fitted into and securable within the outer light guiding part with a holding member removably mounted to the frame, the light guiding board having first and second surfaces and first and second edges, the first surface being convex or concave.
Claim 8
Dependent Claim
15 words
The liquid crystal display device according to claim 5 wherein the first surface is convex.
Claim 9
Dependent Claim
15 words
The liquid crystal display device according to claim 5 wherein the first surface is concave.
Claim 10
Dependent Claim
91 words
The liquid crystal display device according to claim 5 comprising: a diffusing plate disposed on a first side of the inner light guiding part for diffusing light passing through the inner light guiding part; a light scattering part disposed on a second side of the inner light guiding part for directing light from the lamps toward the liquid crystal display panel; and a reflector sheet disposed on the second side of the inner light guiding part for reflecting light from the lamps toward the liquid crystal display panel in a pattern.
Claim 11
Dependent Claim
134 words
A liquid crystal display device comprising: a liquid crystal display panel; lamps; lamp holders holding respective lamps; a light guiding board positioned between the lamps, the light guiding board having first and second edges; a frame holding the lamp holders, wherein the frame comprises a front frame part covering a front side of the lamps and lamp holders, and a rear frame part supporting a rear side of the lamp holders and the light guiding board with a removable holding member, the rear frame part being disposed outside the first and second edges of the light guiding board and having an end edge closest to the first and second edges of the light guiding board that is outwardly spaced apart from the light guiding board; and a reinforcing frame positioned between the lamp holders.
Claim 12
Dependent Claim
134 words
A liquid crystal display device comprising: a liquid crystal display panel; lamps; lamp holders holding respective lamps; a light guiding board positioned between the lamps, the light guiding board having first and second edges; a frame holding the lamp holders, wherein the frame comprises a front frame part covering a front side of the lamps and lamp holders, and a rear frame part supporting a rear side of the lamp holders and the light guiding board with a removable holding member, the rear frame part being disposed outside the first and second edges of the light guiding board and having an end edge closest to the first and second edges of the light guiding board that is outwardly spaced apart from the light guiding board; and a reinforcing frame positioned between the lamp holders.
Claim 13
Dependent Claim
87 words
The liquid crystal display device according to claim 9 comprising: a diffusing plate disposed on a first side of the light guiding board for diffusing light passing through the light guiding board; a light scattering part disposed on a second side of the light guiding board for directing light from the lamps toward the liquid crystal display panel; and a reflector sheet disposed on the second side of the light guiding board for reflecting light from the lamps toward the liquid crystal display panel in a pattern.
Claim 14
Dependent Claim
141 words
A liquid crystal display device comprising: a liquid crystal display panel; a frame holding the liquid crystal display panel; a light guiding board positioned in the frame with a removable holding member mounted to the frame for guiding light introduced into the light guiding board; at least one lamp disposed within the light guiding board for producing light introduced into the light guiding board; a diffusing plate disposed on a first side of the light guiding board for diffusing light passing through the light guiding board; a light scattering part disposed on a second side of the light guiding board for directing light from the lamp toward the liquid crystal display panel: and a reflector sheet disposed on the second side of the light guiding board for reflecting light from the lamp toward the liquid crystal display panel in a pattern.
Claim 15
Dependent Claim
141 words
A liquid crystal display device comprising: a liquid crystal display panel; a frame holding the liquid crystal display panel; a light guiding board positioned in the frame with a removable holding member mounted to the frame for guiding light introduced into the light guiding board; at least one lamp disposed within the light guiding board for producing light introduced into the light guiding board; a diffusing plate disposed on a first side of the light guiding board for diffusing light passing through the light guiding board; a light scattering part disposed on a second side of the light guiding board for directing light from the lamp toward the liquid crystal display panel: and a reflector sheet disposed on the second side of the light guiding board for reflecting light from the lamp toward the liquid crystal display panel in a pattern.
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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) | 2000-08-04 | 2001-02-03 | 2001-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-04 | 2005-02-03 | 2005-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-04 | 2009-02-03 | 2009-08-05 | $7700.00 | Window Closed / Lapsed |