Patent US5951150A successfully refreshed from Google Patents.
US5951150A
Expired / Lapsed
US
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Display system
Assignee: Eaton Corp
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Filing: 1997-09-11
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Granted: 1999-09-14
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Expires: 2017-09-11
Abstract
Abstract A display system includes a plurality of color filters disposed between a plurality of light sources and a display panel. A first light source is energizeable to transmit light through a first color filter to illuminate the display panel with a first color (red). A second light source is energizeable to transmit light through a second color filter to illuminate the display panel with a second color (green). The first and second light sources are simultaneously energizeable to transmit light through both of the color filters to illuminate the display panel with a third color (yellow). The display panel includes inner and outer layers containing light absorbing pigment and light scattering particulate. The outer layer of the panel contains a greater quantity of pigment than the inner layer. The inner layer of the panel contains a greater quantity of light scattering particulate than the outer layer. The inner and outer layers of the panel have the same optical density.
Inventors
- 👤 Robert Patrick Helstern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:04
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/04; H; H01; H01H; H01H13/00; H01H13/02; H01H13/023; H01H2219/00; H01H2219/054
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
211 words
A display system comprising a housing, a display panel connected with said housing, said display panel includes inner and outer layers containing light absorbing pigment and light scattering particulate, each unit volume of said outer layer of said display panel containing a greater quantity of light absorbing pigment than a corresponding unit volume of said inner layer, each unit volume of said inner layer of said display panel containing a greater quantity of light scattering particulate than a corresponding unit volume of said outer layer, a plurality of light sources disposed in said housing, and a plurality of color filters disposed in said housing between said light sources and said display panel, a first light source of said plurality of light sources being energizeable to transmit light through a first color filter of said plurality of color filters to illuminate said display panel with a first color, a second light source of said plurality of light sources being energizeable to transmit light through a second color filter of said plurality of color filters to illuminate said display panel with a second color, said first and second light sources being simultaneously energizeable to simultaneously transmit light through said first and second color filters to illuminate said display panel with a third color.
Claim 2
Dependent Claim
211 words
A display system comprising a housing, a display panel connected with said housing, said display panel includes inner and outer layers containing light absorbing pigment and light scattering particulate, each unit volume of said outer layer of said display panel containing a greater quantity of light absorbing pigment than a corresponding unit volume of said inner layer, each unit volume of said inner layer of said display panel containing a greater quantity of light scattering particulate than a corresponding unit volume of said outer layer, a plurality of light sources disposed in said housing, and a plurality of color filters disposed in said housing between said light sources and said display panel, a first light source of said plurality of light sources being energizeable to transmit light through a first color filter of said plurality of color filters to illuminate said display panel with a first color, a second light source of said plurality of light sources being energizeable to transmit light through a second color filter of said plurality of color filters to illuminate said display panel with a second color, said first and second light sources being simultaneously energizeable to simultaneously transmit light through said first and second color filters to illuminate said display panel with a third color.
Claim 3
Dependent Claim
62 words
A display system as set forth in claim 1 wherein said first color filter has a major side surface area which slopes in a direction away from said display panel and toward said second color filter, said second color filter has a major side surface area which slopes in a direction away from said display panel and toward said first color filter.
Claim 4
Dependent Claim
44 words
A display system as set forth in claim 1 further including an opaque wall structure blocking transmission of light from said first light source through said second color filter and blocking transmission of light from said second light source through said first color filter.
Claim 5
Dependent Claim
24 words
A display system as set forth in claim 1 wherein said inner and outer layers of said display panel have the same optical density.
Claim 6
Dependent Claim
30 words
A display system as set forth in claim 1 wherein said first and second layers of said display panel are interconnected at a location which is free of optical discontinuities.
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) | 2002-09-13 | 2003-03-15 | 2003-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-09-13 | 2007-03-15 | 2007-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-09-13 | 2011-03-15 | 2011-09-14 | $7700.00 | Window Closed / Lapsed |