US4951177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device
Assignee: Nissan Motor Co Ltd
•
Filing: 1990-01-11
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Granted: 1990-08-21
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Expires: 2010-01-11
Abstract
Abstract A display device includes first and second light sources. Lights emitted from the first and second light sources respectively provide different illumination effects on a display face so that a combination of the first and second light sources provides variety of illumination patterns.
Inventors
- 👤 Hiroshi Nishizaki
- 👤 Miyako Nagasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:36
CPC Classifications
G; G01; G01D; G01D7/00; G01D7/02; G01D7/04; G01D7/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
164 words
A display device comprising: a housing; a display member provided in said housing; first lighting means, provided in said housing behind said display member, for emitting light toward said display member onto its back side, said light being transmitted through said display member toward its front side; second lighting means, provided in said housing forward of said display member, for emitting light toward said display member onto its front side, said first and second lighting means having first, second, and third operating modes; in said first mode, said first lighting means being turned on to illuminate said display member from its back side, while said second lighting means being turned off; in said second mode, said second lighting means being turned on to illuminate said display member from its front side, while said first lighting means being turned off; in said third mode, said first and second lighting means being turned on to illuminate said display member from both its back and front sides.
Claim 2
Dependent Claim
164 words
A display device comprising: a housing; a display member provided in said housing; first lighting means, provided in said housing behind said display member, for emitting light toward said display member onto its back side, said light being transmitted through said display member toward its front side; second lighting means, provided in said housing forward of said display member, for emitting light toward said display member onto its front side, said first and second lighting means having first, second, and third operating modes; in said first mode, said first lighting means being turned on to illuminate said display member from its back side, while said second lighting means being turned off; in said second mode, said second lighting means being turned on to illuminate said display member from its front side, while said first lighting means being turned off; in said third mode, said first and second lighting means being turned on to illuminate said display member from both its back and front sides.
Claim 3
Dependent Claim
19 words
A display device as set forth in claim 1, wherein said first lighting means is electrically operated lighting means.
Claim 4
Dependent Claim
18 words
A display device as set forth in claim 2, wherein said electrically lighting means is an electric lamp.
Claim 5
Dependent Claim
19 words
A display device as set forth in claim 2, wherein said second lighting means is electronically operated lighting means.
Claim 6
Dependent Claim
19 words
A display device as set forth in claim 3, wherein said second lighting means is electronically operated lighting means.
Claim 7
Dependent Claim
39 words
A display device as set forth in claim 5, wherein said electronically operated lighting means is an electro-luminesence unit which is fixed in said housing and faces only peripheral area of said display member with a predetermined space therebetween.
Claim 8
Dependent Claim
31 words
A display device as set forth in claim 6, wherein said electro-luminesence unit is entirely covered by a cover member which is fixed in said housing forward of said electro-luminesence unit.
Claim 9
Dependent Claim
25 words
A display device as set forth in claim 7, wherein said cover member is a smoked acrylic plate and is fixed to said electro-luminesence unit.
References Cited (Backward Citations)
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US4233927A
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US4621306A
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US4667273A
Cited
US4559582A
Cited
US4581683A
Cited
US4771368A
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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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |