US4747672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light compensating liquid crystal display
Assignee: Nippon Seiki Co Ltd
•
Filing: 1986-04-08
•
Granted: 1988-05-31
•
Expires: 2006-04-08
Abstract
Abstract In the present invention, a first arm piece for fixing a liquid crystal display element and a second arm piece for fixing a reflecting plate are interconnected at their base portions to form a frame, and a printed circuit board which carries thereon a liquid crystal display element driving circuit connected electrically to the liquid crystal display element is fixed to the back of the reflecting plate, in which construction the angle between the liquid crystal display element and the reflecting plate can be set and maintained stably. Further, a light conductor is disposed on a rear face side of the liquid crystal display element and a light transmission control member is disposed on a rear surface of the light conductor whereby an internal light emitted from an internal light source for illumination of the liquid crystal display element is prevented from leaking to the observer side, that is, it can be conducted in a direction not obstructing the observer's sight.
Inventors
- 👤 Isao Yasuhara
- 👤 Shunichi Kusumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:04
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133308; G02B; G02B27/00; G02B27/01; G02B27/0101; G02B27/0149; B; B60; B60K; B60K2360/00; B60K2360/20; B60K2360/33; B60K2360/334; G02B2027/0118; G02B2027/012; G02B2027/0154; G02B2027/0165; G02B2027/0192; G02B2027/0194; G02B6/00; G02F1/1335; G02F1/133553; G02F1/1336; G02F1/133618
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
A liquid crystal display device to reflect light which has passed through said liquid crystal display device comprising: a liquid crystal display element; a reflecting plate disposed below said liquid crystal display element and inclined relative to said element by a predetermined angle; first and second arm pieces having a base portion, free ends of said arm pieces extending at an angle θ from said base portion, said first and second arm pieces and said base portion together forming a frame; said liquid crystal display element fixed on said first arm piece and said reflecting plate fixed on said second arm piece; said liquid crystal display device further comprising: a printed circuit board carrying thereon a liquid crystal display element driving circuit; and said printed circuit board fixed on a rear surface of said reflecting plate.
Claim 2
Dependent Claim
136 words
A liquid crystal display device to reflect light which has passed through said liquid crystal display device comprising: a liquid crystal display element; a reflecting plate disposed below said liquid crystal display element and inclined relative to said element by a predetermined angle; first and second arm pieces having a base portion, free ends of said arm pieces extending at an angle θ from said base portion, said first and second arm pieces and said base portion together forming a frame; said liquid crystal display element fixed on said first arm piece and said reflecting plate fixed on said second arm piece; said liquid crystal display device further comprising: a printed circuit board carrying thereon a liquid crystal display element driving circuit; and said printed circuit board fixed on a rear surface of said reflecting plate.
Claim 3
Dependent Claim
17 words
A liquid crystal display device according to claim 1, wherein said frame is secured together by bolts.
Claim 4
Dependent Claim
80 words
A liquid crystal display device according to claim 1, characterized by being a vehicular indicating instrument in which when the surroundings are light, for example, during the daytime, an external light incident through a front glass is introduced from said light transmitting window, while when the surroundings are dark, for example, during the night, an internal light emitted from said light source is directed to said liquid crystal display element through said light conductor to thereby illuminate the display element.
Claim 5
Dependent Claim
142 words
A liquid crystal display device in which a light conductor is disposed on a rear surface of a transmission type liquid crystal display element, said liquid crystal display element being illuminated through said light conductor by an internal light emitted from a light source or by an external light entering from a light transmitting window provided above said light conductor, and light which has passed through said liquid crystal display element being reflected by a reflecting plate which is disposed below said liquid crystal display element inclinedly at a predetermined angle and a display image thus reflected being seen, characterized in that a light transmission control member is disposed on a rear surface of said light conductor so that the internal light leaking from said light transmitting window toward the surface of said light conductor can be shielded from the observer side.
Claim 6
Dependent Claim
142 words
A liquid crystal display device in which a light conductor is disposed on a rear surface of a transmission type liquid crystal display element, said liquid crystal display element being illuminated through said light conductor by an internal light emitted from a light source or by an external light entering from a light transmitting window provided above said light conductor, and light which has passed through said liquid crystal display element being reflected by a reflecting plate which is disposed below said liquid crystal display element inclinedly at a predetermined angle and a display image thus reflected being seen, characterized in that a light transmission control member is disposed on a rear surface of said light conductor so that the internal light leaking from said light transmitting window toward the surface of said light conductor can be shielded from the observer side.
Claim 7
Dependent Claim
52 words
A liquid crystal display device according to claim 4, wherein said light transmission control member comprises a plurality of strips arranged approximately in parallel and inclined at an angle at which the internal light leaking from said light transmitting window toward said light conductor surface can be shielded from the observer side.
Claim 8
Dependent Claim
22 words
A liquid crystal display device according to claim 5, wherein said plural strips are inclined toward the side opposite to the observer.
Claim 9
Dependent Claim
23 words
A liquid crystal display device according to claim 5, wherein said plural strips are inclined right- and leftwards with respect to the observer.
Claim 10
Dependent Claim
116 words
A liquid crystal display device according to claim 4, wherein said light transmission control member is a shutter disposed on a rear surface of said light conductor and having a light transmitting portion, and wherein a spring member for movement formed from a shape memory alloy is disposed near said light source, said spring member for movement being connected to said shutter and capable of controlling the position of said shutter so that the external light is incident on said light conductor through said light transmitting portion when said light source is OFF and the internal light emitted from said light source does not leak from said light transmitting portion when said light source is ON.
Claim 11
Dependent Claim
80 words
A liquid crystal display device according to claim 4, characterized by being a vehicular indicating instrument in which when the surroundings are light, for example, during the daytime, an external light incident through a front glass is introduced from said light transmitting window, while when the surroundings are dark, for example, during the night, an internal light emitted from said light source is directed to said liquid crystal display element through said light conductor to thereby illuminate the display element.
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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |