Patent US4561044A successfully refreshed from Google Patents.
US4561044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting device for a display panel of an electronic device
Assignee: Citizen Watch Co Ltd
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Filing: 1984-10-23
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Granted: 1985-12-24
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Expires: 2004-10-23
Abstract
Abstract A liquid crystal display panel is hinged on a body comprising a case provided with an electric circuit therein. On the case, a mirror is provided for watching an image on the liquid crystal display panel by the light passing through the display panel. An electroluminescence device is detachably provided in a receptacle in the case. The electroluminescence device can be positioned at a position adjacent the liquid crystal display panel so as to light the panel.
Inventors
- 👤 Takashi Ogura
- 👤 Toshihide Hirohara
- 👤 Masaaki Matsunaga
- 👤 Kiyoshi Kamiya
- 👤 Tetsuo Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:13
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133308; G02F1/133616
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
An improved lighting device for an electronic device having a body comprising a case provided with an electric circuit therein, a liquid crystal display panel provided on the case and a mirror for watching an image on the liquid crystal display panel by the light passing through the display panel, wherein the improvement comprising: an electroluminescence device detachably provided in the case; first means for supplying a current from the electric circuit to the electroluminescence device; second means for positioning the electroluminescence device at a position adjacent the liquid crystal display panel so as to light the panel.
Claim 2
Dependent Claim
98 words
An improved lighting device for an electronic device having a body comprising a case provided with an electric circuit therein, a liquid crystal display panel provided on the case and a mirror for watching an image on the liquid crystal display panel by the light passing through the display panel, wherein the improvement comprising: an electroluminescence device detachably provided in the case; first means for supplying a current from the electric circuit to the electroluminescence device; second means for positioning the electroluminescence device at a position adjacent the liquid crystal display panel so as to light the panel.
Claim 3
Dependent Claim
28 words
The lighting device according to claim 1 wherein the liquid crystal display panel is hinged on the case at one end thereof and held in a slanted position.
Claim 4
Dependent Claim
19 words
The lighting device according to claim 2 further comprising third means for receiving the electroluminescence device in the case.
Claim 5
Dependent Claim
23 words
The lighting device according to claim 3 wherein the electroluminescence device is attached to the upper surface of the liquid crystal display panel.
Claim 6
Dependent Claim
30 words
The lighting device according to claim 3 wherein the electroluminescence device is positioned in a position adjacent the underside of the liquid crystal display panel disposed in the horizontal position.
Claim 7
Dependent Claim
40 words
The lighting device according to claim 3 wherein the electroluminescence device is attached to the rear side of the mirror to form a panel member and the panel member is so arranged as to be reversibly mounted on the 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) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |