Patent US3864730A successfully refreshed from Google Patents.
US3864730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television receiver including a large screen projection system
Assignee: Individual
•
Filing: 1973-11-05
•
Granted: 1975-02-04
•
Expires: 1993-11-05
Abstract
Abstract A large screen television receiver using a laser beam to excite filaments or films of metal to incandescence. The discrete elements are focused onto a viewing screen which may be viewed by a large audience. The laser beam is split into three parts to show a three color image. Laser beam modulators, of any known type, are used to vary the beam intensity in accordance with the receiver signals. Synchronous moving mirrors are employed to scan the array of elements and a projector system is employed to project the received pattern onto a large screen.
Inventors
- 👤 Solo S Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:57
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3129
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
162 words
A large screen television receiver comprising: a. a laser for generating a concentrated beam of light; b. Optical means for dividing the beam into three equal spaced beams; c. modulation means positioned in the path of each beam for modulating the beam energies in accordance with a three color television signal; d. horizontal and vertical scanning means for forming a three color pattern of a television signal in a first image plane; e. an intermediate screen positioned in the first image plane, said screen including a transparent supporting sheet, a plurality of strips of a metal which is rendered incandescent when struck by a laser beam, and a plurality of color filters positioned adjacent to the strips for filtering the light produced by the metal strips; f. optical means for focusing the light generated by the intermediate screen and projecting it to a second image plane; and g. a viewing screen positioned in the second image plane for showing the television signal.
Claim 2
Dependent Claim
162 words
A large screen television receiver comprising: a. a laser for generating a concentrated beam of light; b. Optical means for dividing the beam into three equal spaced beams; c. modulation means positioned in the path of each beam for modulating the beam energies in accordance with a three color television signal; d. horizontal and vertical scanning means for forming a three color pattern of a television signal in a first image plane; e. an intermediate screen positioned in the first image plane, said screen including a transparent supporting sheet, a plurality of strips of a metal which is rendered incandescent when struck by a laser beam, and a plurality of color filters positioned adjacent to the strips for filtering the light produced by the metal strips; f. optical means for focusing the light generated by the intermediate screen and projecting it to a second image plane; and g. a viewing screen positioned in the second image plane for showing the television signal.
Claim 3
Dependent Claim
31 words
A television receiver as claimed in claim 1 wherein said optical means for dividing the laser beam into three equal beams includes three mirrors, two of which include partially reflecting coatings.
Claim 4
Dependent Claim
17 words
A television receiver as claimed in claim 1 wherein said scanning means includes two rotating mirror arrangements.
Claim 5
Dependent Claim
23 words
A television receiver as claimed in claim 1 wherein said metal is taken from the group which consists of tungsten, platinum, and tantalum.
Claim 6
Dependent Claim
38 words
A television receiver as claimed in claim 1 wherein said intermediate screen is assembled with the metal strips positioned on one side of the transparent sheet and the filter sections positioned on the other side of the sheet.
Claim 7
Dependent Claim
22 words
A television receiver as claimed in claim 1 wherein said transparent sheet is formed with horizontal ribs to separate the filter strips.
Claim 8
Dependent Claim
23 words
A television receiver as claimed in claim 1 wherein said intermediate screen is housed within a gastight transparent envelope containing an inert gas.
Claim 9
Dependent Claim
23 words
A television receiver as claimed in claim 1 wherein said metal strips are heated to a temperature below incandescence by an electric current.
Claim 10
Dependent Claim
28 words
A television receiver as claimed in claim 1 wherein a heat absorbing material is placed in the optical means to remove infra red rays from the viewing screen.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |