US5045706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent screen
Assignee: Pioneer Corp
•
Filing: 1990-04-05
•
Granted: 1991-09-03
•
Expires: 2010-04-05
Abstract
Abstract A fluorescent screen comprises a plate woven or knitted from one or more threads each including an organic fluorescent substance. Since the luminescent light is scattered by the threads constructing the plate, the light emitted from the screen is increased to a level higher than that of the conventional fluorescent screen to enhance brightness thereof.
Inventors
- 👤 Satoru Tanaka
- 👤 Yasushi Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:46
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/2004; H01J29/30; H01J29/32
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
91 words
A fluorescent screen specially adapted for use in an image display device of rear-projection or front-projection type and having a plurality of picture elements which emit light when stimulated by a scanning beam of stimulating light impinging onto the fluorescent screen in the form of a spot, comprising a fabric plate woven or knitted from one or more threads, each of said threads including an organic fluorescent substance, said fabric plate comprising a plurality of picture elements wherein at least three intersected portions of said threads exist within each picture element.
Claim 2
Dependent Claim
91 words
A fluorescent screen specially adapted for use in an image display device of rear-projection or front-projection type and having a plurality of picture elements which emit light when stimulated by a scanning beam of stimulating light impinging onto the fluorescent screen in the form of a spot, comprising a fabric plate woven or knitted from one or more threads, each of said threads including an organic fluorescent substance, said fabric plate comprising a plurality of picture elements wherein at least three intersected portions of said threads exist within each picture element.
Claim 3
Dependent Claim
15 words
A fluorescent screen as claimed in claim 1, in which said threads are spun yarns.
Claim 4
Dependent Claim
32 words
A fluorescent screen as claimed in claim 2, wherein said spun yarn comprises a plurality of fibers and a mixture of said organic fluorescent substance and a binder dispersed among said fibers.
Claim 5
Dependent Claim
14 words
A fluorescent screen as claimed in claim 3, in which said binder is polymethylmethacrylate.
Claim 6
Dependent Claim
18 words
A fluorescent screen as claimed in claim 2, wherein said fabric plate has a plain weave fabric structure.
Claim 7
Dependent Claim
84 words
A fluorescent screen as claimed in claim 5, wherein said threads comprise a first fluorescent thread carrying a first organic fluorescent substance which emits red light when activated by a stimulating light, a second fluorescent thread carrying a second organic fluorescent substance which emits green light when activated by a stimulating light and a third fluorescent thread carrying a third organic fluorescent substance which emits blue light when activated by a stimulating light, wherein said three intersected portions correspond to three primary colors portions.
Claim 8
Dependent Claim
29 words
A fluorescent screen as claimed in claim 6, wherein said threads further comprise a conductive index filament which generates a beam index signal when irradiated by a light beam.
Claim 9
Dependent Claim
14 words
A fluorescent screen as claimed in claim 1, in which said threads are filaments.
Claim 10
Dependent Claim
15 words
A fluorescent screen as claimed in claim 5, in which said synthetic resin is polymethylmethacrylate.
Claim 11
Dependent Claim
19 words
A fluorescent screen as claimed in claim 5, in which said fabric plate has a plain weave fabric structure.
Claim 12
Dependent Claim
85 words
A fluorescent screen as claimed in claim 10, in which said filaments comprise a first fluorescent filament carrying a first organic fluorescent substance which emits red light when activated by a stimulating light, a second fluorescent filament carrying a second organic fluorescent substance which emits green light when activated by a stimulating light and a third fluorescent filament carrying a third organic fluorescent substance which emits blue light when activated by a stimulating light, wherein said three intersected portions correspond to three primary colors portions.
Claim 13
Dependent Claim
30 words
A fluorescent screen as claimed in claim 11, in which said filaments further comprise a conductive index filament which generates a beam index signal when irradiated by a light beam.
Claim 14
Dependent Claim
19 words
A fluorescent screen as claimed in claim 1, in which said fabric plate has a plain weave fabric structure.
Claim 15
Dependent Claim
85 words
A fluorescent screen as claimed in claim 13, in which said filaments comprise a first fluorescent filament carrying a first organic fluorescent substance which emits red light when activated by a stimulating light, a second fluorescent filament carrying a second organic fluorescent substance which emits green light when activated by a stimulating light and a third fluorescent filament carrying a third organic fluorescent substance which emits blue light when activated by a stimulating light, wherein said three intersected portions correspond to three primary colors portions.
Claim 16
Dependent Claim
30 words
A fluorescent screen as claimed in claim 14, in which said filaments further comprise a conductive index filament which generates a beam index signal when irradiated by a light beam.
Claim 17
Dependent Claim
32 words
A fluorescent screen as claimed in claim 1, wherein said picture element has an area corresponding to the spot formed by the scanning beam of stimulating light impinging onto the fluorescent screen.
Claim 18
Independent Claim
150 words
A method for manufacturing a fluorescent screen specially adapted for use in an image display device of a rear-projection or front-projection type and having a plurality of picture elements which emit light when stimulated by a scanning beam of stimulating light impinging onto the fluorescent screen in the form of a spot, comprising the steps of: preparing spun yarns comprising a plurality of fibers, preparing a solution including a solvent and a mixture which comprises an organic fluorescent substance and a binder, immersing said spun yarns into said solution, drying said spun yarns to remove said solvent therefrom so that said organic fluorescent substance is dispersed within the fibers of said spun yarns, and weaving or knitting one or more of said spun yarns into a plate of fabric comprising a plurality of picture elements, wherein at least three intersected portions of said spun yarns exist within each picture element.
Claim 19
Independent Claim
150 words
A method for manufacturing a fluorescent screen specially adapted for use in an image display device of a rear-projection or front-projection type and having a plurality of picture elements which emit light when stimulated by a scanning beam of stimulating light impinging onto the fluorescent screen in the form of a spot, comprising the steps of: preparing spun yarns comprising a plurality of fibers, preparing a solution including a solvent and a mixture which comprises an organic fluorescent substance and a binder, immersing said spun yarns into said solution, drying said spun yarns to remove said solvent therefrom so that said organic fluorescent substance is dispersed within the fibers of said spun yarns, and weaving or knitting one or more of said spun yarns into a plate of fabric comprising a plurality of picture elements, wherein at least three intersected portions of said spun yarns exist within each picture element.
Claim 20
Dependent Claim
18 words
A method for manufacturing a fluorescent screen as claimed in claim 6, in which said binder is polymethylmethacrylate.
Claim 21
Independent Claim
115 words
A method for manufacturing a fluorescent screen specially adapted for use in an image display device of a rear-projection or front-projection type and having a plurality of picture elements which emit light when stimulated by a scanning beam of stimulating light impinging onto the fluorescent screen in the form of a spot, comprising the steps of: preparing a fluid of material for a synthetic resin including an organic fluorescent substance, preparing spun yarns through extrusion from said fluid, and weaving or knitting one or more of said spun yarns into a plate of fabric comprising a plurality of picture elements, wherein at least three intersected portions of said spun yarns exist within each picture element.
Claim 22
Independent Claim
115 words
A method for manufacturing a fluorescent screen specially adapted for use in an image display device of a rear-projection or front-projection type and having a plurality of picture elements which emit light when stimulated by a scanning beam of stimulating light impinging onto the fluorescent screen in the form of a spot, comprising the steps of: preparing a fluid of material for a synthetic resin including an organic fluorescent substance, preparing spun yarns through extrusion from said fluid, and weaving or knitting one or more of said spun yarns into a plate of fabric comprising a plurality of picture elements, wherein at least three intersected portions of said spun yarns exist within each picture element.
Claim 23
Dependent Claim
19 words
A method for manufacturing a fluorescent screen as claimed in claim 8, in which said synthetic resin is polymethylmethacrylate.
References Cited (Backward Citations)
US2716082A
Cited
US2716081A
Cited
US2802753A
Cited
US2851612A
Cited
US3291668A
Cited
US4032791A
Cited
US4916321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-02 | 1995-03-04 | 1995-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-02 | 1999-03-04 | 1999-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-02 | 2003-03-04 | 2003-09-03 | $7700.00 | Window Closed / Lapsed |