US5090800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projector having a liquid crystal display panel
Assignee: Fujifilm Holdings Corp
•
Filing: 1991-05-02
•
Granted: 1992-02-25
•
Expires: 2011-05-02
Abstract
Abstract On the outside of a body of a projector, an LCD is provided for displaying an image. A lamp is incorporated in the projector body for illuminating from the rear an image displayed on the LCD. A movable member is provided on the outside of the projector body for vertical swinging movement between open and closed states, and, in the closed state, allows the LCD to be directly observed. A projecting head is provided on the movable member for projecting, in the open state, the image illuminated by the lamp onto a screen outside the projector body.
Inventors
- 👤 Seimei Ushiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:54
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133626; G02F1/133627; Y; Y10; Y10S; Y10S353/00; Y10S353/03
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
103 words
A projector comprising: a projector body; electro-optical display means provided on the outside of said projector body for displaying an image; a light source in said projector body for illuminating from the rear said image displayed on said electro-optical display means; a movable member mounted on the outside of said projector body for movement between open and closed states, said movable member in said closed state allowing said electro-optical display means to be directly observed; and a projecting head on said movable member for projecting in said open state said image illuminated by said light source onto a screen outside said projector body.
Claim 2
Dependent Claim
103 words
A projector comprising: a projector body; electro-optical display means provided on the outside of said projector body for displaying an image; a light source in said projector body for illuminating from the rear said image displayed on said electro-optical display means; a movable member mounted on the outside of said projector body for movement between open and closed states, said movable member in said closed state allowing said electro-optical display means to be directly observed; and a projecting head on said movable member for projecting in said open state said image illuminated by said light source onto a screen outside said projector body.
Claim 3
Dependent Claim
18 words
A projector as defined in claim 1, wherein said electro-optical display means is a liquid crystal display panel.
Claim 4
Dependent Claim
24 words
A projector as defined in claim 2, wherein an illuminating optical system is disposed between said light source and said liquid crystal display panel.
Claim 5
Dependent Claim
26 words
A projector as defined in claim 3, wherein said illuminating optical system includes first and second condenser lenses and a mirror disposed between said condenser lenses.
Claim 6
Dependent Claim
41 words
A projector as defined in claim 2, wherein said projector body has a base on which the projector rests when said movable member is closed, said liquid crystal display panel being inclined upwardly rearwardly when said projector rests on said base.
Claim 7
Dependent Claim
41 words
A projector as defined in claim 5, wherein said projector body has an end on which the projector rests when said movable member is open, said liquid crystal display panel being inclined upwardly rearwardly when said projector rests on said end.
Claim 8
Dependent Claim
24 words
A projector as defined in claim 6, wherein said base and said end adjoin and are disposed at a right angle to each other.
Claim 9
Dependent Claim
21 words
A projector as defined in claim 1, further comprising a first lens in said projecting head for enlarging said illuminated image.
Claim 10
Dependent Claim
28 words
A projector as defined in claim 8, further comprising a mirror in said projecting head for reflecting light which has passed through said first lens toward said screen.
Claim 11
Dependent Claim
34 words
A projector as defined in claim 9, further comprising a second lens mounted in said movable member, positioned in said closed state in front of said liquid crystal display panel for enlarging said image.
Claim 12
Dependent Claim
63 words
A projector as defined in claim 1, further comprising: means for sensing said open and closed states of said movable member; and light source control means for determining a brightness of said light source in accordance with an output of said sensing means selectively to be a first value corresponding to said open state or a second value corresponding to said closed state.
Claim 13
Dependent Claim
17 words
A projector as defined in claim 11, wherein said first value is greater than said second value.
Claim 14
Dependent Claim
37 words
A projector as defined in claim 12, wherein a diffusion plate for diffusing light is inserted in an optical path between said light source and said liquid crystal display panel when said brightness has said second value.
Claim 15
Dependent Claim
18 words
A projector as defined in claim 1, wherein said movable member is pivotably mounted on said projector body.
References Cited (Backward Citations)
US3387535A
Cited
US3479116A
Cited
US3899246A
Cited
US3904286A
Cited
US4030821A
Cited
US4140377A
Cited
US4163610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |