Patent US4663670A successfully refreshed from Google Patents.
US4663670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television receiver having a liquid crystal display device
Assignee: Citizen Watch Co Ltd
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Filing: 1984-12-11
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Granted: 1987-05-05
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Expires: 2004-12-11
Abstract
Abstract A television receiver having a liquid crystal display device includes a receiver having a electromagnetically shielded case and a receiving circuit provided in the shielded case and electrically connected to an antenna for producing audio signals and video signals. A liquid crystal display panel of the liquid crystal display device is electromagnetically shielded by a transparent and conductive shielding film for shielding the liquid crystal display panel.
Inventors
- 👤 Katsu Ito
- 👤 Munehiro Shinabe
- 👤 Akira Miyajima
- 👤 Nobuyuki Hashimoto
- 👤 Hideshi Ohno
- 👤 Akira Tsuzuki
- 👤 Shigeru Morokawa
- 👤 Minoru Natori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:26
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133308; H; H04; H04N; H04N5/00; H04N5/44; H04N5/64; G02F1/133331; G02F1/133334; G02F1/1335; G02F1/1336; G02F1/133618
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
112 words
A television receiver comprising: a case having an electromagnetic shielding quality and having an opening at an upper side thereof; an antenna; receiving means, provided in said case and electrically connected to the antenna, for producing audio signals and video signals; a liquid crystal display panel disposed adjacent to said opening; a reflector disposed adjacent to said panel opposite from said opening; driving means, responsive to the video signals, for driving the liquid crystal display panel to display said video signals; and transparent and conductive shielding means for electromagnetically shielding a surface of the liquid crystal display panel so as to prevent radiation of pulse noise from said liquid crystal display panel.
Claim 2
Dependent Claim
112 words
A television receiver comprising: a case having an electromagnetic shielding quality and having an opening at an upper side thereof; an antenna; receiving means, provided in said case and electrically connected to the antenna, for producing audio signals and video signals; a liquid crystal display panel disposed adjacent to said opening; a reflector disposed adjacent to said panel opposite from said opening; driving means, responsive to the video signals, for driving the liquid crystal display panel to display said video signals; and transparent and conductive shielding means for electromagnetically shielding a surface of the liquid crystal display panel so as to prevent radiation of pulse noise from said liquid crystal display panel.
Claim 3
Dependent Claim
39 words
The television receiver according to claim 1 further comprising a cover glass provided to cover the surface of said liquid crystal display panel, and said transparent and conductive shielding means is provided on the underside of the cover glass.
Claim 4
Dependent Claim
19 words
The television receiver according to claim 1 wherein said transparent and conductive shielding means is formed of indium oxide.
Claim 5
Dependent Claim
19 words
The television receiver according to claim 1 wherein said transparent and conductive shielding means is formed of tin oxide.
Claim 6
Dependent Claim
89 words
A television receiver comprising: a case; an antenna mounted on said case; receiving means, provided in said case and electrically connected to said antenna, for producing audio and video signals; a liquid crystal display panel; driving means, responsive to said video signals, for driving said liquid crystal display panel with said video signals; and shield means for electromagnetically shielding said antenna and receiving means from pulse noise developed by said liquid crystal display panel, said shield means including a transparent conductive layer formed over said liquid crystal display panel.
Claim 7
Dependent Claim
89 words
A television receiver comprising: a case; an antenna mounted on said case; receiving means, provided in said case and electrically connected to said antenna, for producing audio and video signals; a liquid crystal display panel; driving means, responsive to said video signals, for driving said liquid crystal display panel with said video signals; and shield means for electromagnetically shielding said antenna and receiving means from pulse noise developed by said liquid crystal display panel, said shield means including a transparent conductive layer formed over said liquid crystal display panel.
Claim 8
Dependent Claim
16 words
The television receiver of claim 5 wherein said transparent conductive layer is formed of indium oxide.
Claim 9
Dependent Claim
18 words
The television receiver of claim 5 wherein said shield means includes said case, said case being electrically conductive.
Claim 10
Dependent Claim
17 words
The television receiver of claim 7 wherein said case is electrically connected to said transparent conductive layer.
Claim 11
Dependent Claim
27 words
The television receiver of claim 5 wherein said case is formed of a non-conductive material, said shield means including a conductive case layer formed over said case.
Claim 12
Dependent Claim
19 words
The television receiver of claim 9 wherein said conductive case layer and said transparent conductive layer are electrically connected.
Claim 13
Dependent Claim
31 words
The television receiver of claim 5 wherein said case includes a first portion containing said receiving means and a second portion containing said liquid crystal display panel and said driving means.
Claim 14
Dependent Claim
20 words
The television receiver of claim 11 wherein said shield means includes a conductive case layer on each said case portion.
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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) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |