US5333073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backlight device and liquid crystal display having conductive film on electromagnetic shield or diffuser between fluorescent tubes and display
Assignee: Gold Charm Ltd
•
Filing: 1992-12-29
•
Granted: 1994-07-26
•
Expires: 2012-12-29
Abstract
Abstract A liquid crystal display equipment comprising a liquid crystal display panel for displaying therein characters or an image, a backlight device serving as an auxiliary device to finely display the characters or image in the display panel by irradiating a light from the back of the liquid crystal display panel, and a sheet of light diffusion plate mounted between the liquid crystal display panel and the backlight device and making a uniform illumination plane for the display panel by diffusing the light through itself. The backlight device comprises a transparent conductive film mounted in the vicinity of a plurality of fluorescent lamps arranged in parallel relationship to one another on the back side of the light diffusion plate so as to act as a backlight source of the backlight device.
Inventors
- 👤 Mitsuhiro Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:12
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133602; G02F1/133604; F; F21; F21V; F21V25/00; G02F1/133606; G02F1/133611; G02F1/133308; G02F1/133334
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
A backlight device comprising a plurality of fluorescent lamps arranged in parallel relationship to one another on a back side of a liquid crystal display panel as a backlight of said display panel, an electromagnetic shielding means mounted between the fluorescent lamps and the display panel, two transparent conductive films, one on each side of the electromagnetic shielding means, and a light diffusion plate between the display panel and the electromagnetic shielding means for diffusing the light irradiated from said fluorescent lamps to the liquid crystal display panel.
Claim 2
Dependent Claim
88 words
A backlight device comprising a plurality of fluorescent lamps arranged in parallel relationship to one another on a back side of a liquid crystal display panel as a backlight of said display panel, an electromagnetic shielding means mounted between the fluorescent lamps and the display panel, two transparent conductive films, one on each side of the electromagnetic shielding means, and a light diffusion plate between the display panel and the electromagnetic shielding means for diffusing the light irradiated from said fluorescent lamps to the liquid crystal display panel.
Claim 3
Dependent Claim
72 words
A backlight device comprising a plurality of fluorescent lamps arranged in parallel relationship to one another on a back side of a liquid crystal display panel as a backlight of said display panel, a light diffusion plate between the display and the fluorescent lamps for diffusing the light irradiated from said fluorescent lamps to the liquid crystal display panel, and two transparent conductive films, one on each side of the diffusion plate.
Claim 4
Dependent Claim
72 words
A backlight device comprising a plurality of fluorescent lamps arranged in parallel relationship to one another on a back side of a liquid crystal display panel as a backlight of said display panel, a light diffusion plate between the display and the fluorescent lamps for diffusing the light irradiated from said fluorescent lamps to the liquid crystal display panel, and two transparent conductive films, one on each side of the diffusion plate.
Claim 5
Dependent Claim
153 words
A backlight device comprising a plurality of fluorescent lamps arranged in parallel relationship to one another on a back side of a liquid crystal display panel as a backlight of said display panel, an electromagnetic shielding means mounted between the fluorescent lamps and the display panel, and a light diffusion plate between the display panel and the electromagnetic shielding means for diffusing the light irradiated from said fluorescent lamps to the liquid crystal display panel, said electromagnetic shielding means comprising a transparent polyester film, a transparent conductive film comprising indium tin oxide formed on a surface of the electromagnetic shielding means, an aluminum pattern formed on a surface of said indium tin oxide film, and a thin over-coating layer formed on and over surfaces of said aluminum pattern and said indium tin oxide film, wherein said aluminum pattern is so formed as to border all edge portions of said indium tin oxide film.
Claim 6
Dependent Claim
153 words
A backlight device comprising a plurality of fluorescent lamps arranged in parallel relationship to one another on a back side of a liquid crystal display panel as a backlight of said display panel, an electromagnetic shielding means mounted between the fluorescent lamps and the display panel, and a light diffusion plate between the display panel and the electromagnetic shielding means for diffusing the light irradiated from said fluorescent lamps to the liquid crystal display panel, said electromagnetic shielding means comprising a transparent polyester film, a transparent conductive film comprising indium tin oxide formed on a surface of the electromagnetic shielding means, an aluminum pattern formed on a surface of said indium tin oxide film, and a thin over-coating layer formed on and over surfaces of said aluminum pattern and said indium tin oxide film, wherein said aluminum pattern is so formed as to border all edge portions of said indium tin oxide film.
Claim 7
Dependent Claim
30 words
A backlight device as set forth in claim 3, wherein said aluminum pattern is formed at such portions of said indium tin oxide film as correspond to said fluorescent lamps.
Claim 8
Dependent Claim
38 words
A backlight device as set forth in claim 4, wherein said aluminum pattern has a great number of light transmitting holes each of whose size is adjusted in proportion to the degree of luminous intensity that passes therethrough.
Claim 9
Dependent Claim
156 words
A backlight device comprising a plurality of fluorescent lamps arranged in parallel relationship to one another on a back side of a liquid crystal display panel as a backlight of said display panel, an electromagnetic shielding means mounted between the fluorescent lamps and the display panel, and a light diffusion plate between the display panel and the electromagnetic shielding means for diffusing the light irradiated from said fluorescent lamps to the liquid crystal display panel, said electromagnetic shielding means comprising a transparent polyester film, a transparent conductive film comprising indium tin oxide formed on each surface of the electromagnetic shielding means, an aluminum pattern formed on a surface of each said indium tin oxide film, and a thin over-coating layer formed on and over surfaces of each of said aluminum pattern and said indium tin oxide films, wherein said aluminum patterns are so formed as to border all edge portions of said indium tin oxide films.
Claim 10
Dependent Claim
156 words
A backlight device comprising a plurality of fluorescent lamps arranged in parallel relationship to one another on a back side of a liquid crystal display panel as a backlight of said display panel, an electromagnetic shielding means mounted between the fluorescent lamps and the display panel, and a light diffusion plate between the display panel and the electromagnetic shielding means for diffusing the light irradiated from said fluorescent lamps to the liquid crystal display panel, said electromagnetic shielding means comprising a transparent polyester film, a transparent conductive film comprising indium tin oxide formed on each surface of the electromagnetic shielding means, an aluminum pattern formed on a surface of each said indium tin oxide film, and a thin over-coating layer formed on and over surfaces of each of said aluminum pattern and said indium tin oxide films, wherein said aluminum patterns are so formed as to border all edge portions of said indium tin oxide films.
Claim 11
Dependent Claim
49 words
An electromagnetic shielding member comprising a transparent polyester film, a transparent conductive film formed on and over said polyester film, and an aluminum pattern formed on a surface of said conductive film, said aluminum pattern being so formed as to border all edge surfaces of said transparent conductive film.
Claim 12
Dependent Claim
49 words
An electromagnetic shielding member comprising a transparent polyester film, a transparent conductive film formed on and over said polyester film, and an aluminum pattern formed on a surface of said conductive film, said aluminum pattern being so formed as to border all edge surfaces of said transparent conductive film.
References Cited (Backward Citations)
US4795941A
Cited
US5029986A
Cited
US4936659A
Cited
US5195822A
Cited
US5214522A
Cited
US5143433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-25 | 1998-01-24 | 1998-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-25 | 2002-01-24 | 2002-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-25 | 2006-01-24 | 2006-07-26 | $7700.00 | Window Closed / Lapsed |