Patent US2156131A successfully refreshed from Google Patents.
Patent US4668046A successfully refreshed from Google Patents.
US4668046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission type screen apparatus
Assignee: YUP CO Ltd
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Filing: 1986-02-24
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Granted: 1987-05-26
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Expires: 2006-02-24
Abstract
Abstract A transmission type projection multi-screen apparatus includes a frame, a plurality of transmission type screen units closely arranged in the frame thereby to form a multi-screen, a plurality of projectors at the rear of the screen units for projecting lights of a picture image to the screen units, respectively, and means fixed to the frame for supporting the screen units. The supporting means is placed substantially in a dead angle of the lights.
Inventors
- 👤 Yoshio Yatabe
- 👤 Tadasu Yatabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:22
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625; H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3141; H04N9/3147
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
A transmission type projection multi-screen apparatus comprising: a frame; a plurality of transmission type screen units closely arranged in the frame thereby forming a multi-screen; plurality of projectors placed at the rear of the screen units for projecting projection lights of a picture image to the screen units, respectively; and means fixed to the frame for supporting the screen units, the supporting means being places substantially within a dead angle of the lights from the projectors, wherein the supporting means is a support having a triangular tip portion which is placed in a space formed between the adjacent screen units, the space corresponding to the dead angle of the lights.
Claim 2
Dependent Claim
110 words
A transmission type projection multi-screen apparatus comprising: a frame; a plurality of transmission type screen units closely arranged in the frame thereby forming a multi-screen; plurality of projectors placed at the rear of the screen units for projecting projection lights of a picture image to the screen units, respectively; and means fixed to the frame for supporting the screen units, the supporting means being places substantially within a dead angle of the lights from the projectors, wherein the supporting means is a support having a triangular tip portion which is placed in a space formed between the adjacent screen units, the space corresponding to the dead angle of the lights.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1, wherein the screen units are continuously arranged along a previously designed straight line.
Claim 4
Dependent Claim
17 words
The apparatus of claim 1, wherein the screen units are continuously arranged along a previously designed circle.
Claim 5
Dependent Claim
32 words
The apparatus of claim 1, wherein the supporting means is a support fixed to the adjacent screen units by a plurality of thin holder plates within the dead angle of the lights.
Claim 6
Dependent Claim
22 words
The apparatus of claim 4, wherein the thin holder plates are disposed at their front end portion between the adjacent screen units.
Claim 7
Dependent Claim
49 words
The apparatus of claim 5, wherein the support includes two halves, one of which is fixed to one of the adjacent screen units by some of the holder plates, and the other of which is fixed to the other of the adjacent screen units by the other holder plates.
Claim 8
Dependent Claim
25 words
The apparatus of claim 6, wherein the holder plates extend through a full thickness of the screen units so as to appear on the multi-screen.
Claim 9
Dependent Claim
26 words
The apparatus of claim 6, wherein the holder plates are fitted at their front end portion in a channel-shaped groove formed betwen the adjacent screen units.
Claim 10
Dependent Claim
57 words
The apparatus of claim 8, wherein the adjacent screen units include a lenticular lens sheet and a Fresnel lens sheet fixed thereto in a two-layer form and wherein the holder plates are positioned only at the Fresnel lens sheet of the screen units so that the lenticular lens sheets cover the holder plates at their front end.
References Cited (Backward Citations)
US4473355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |