US4775222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light diffusing device
Assignee: Mitsubishi Chemical Corp
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Filing: 1986-11-25
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Granted: 1988-10-04
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Expires: 2006-11-25
Abstract
Abstract A light diffusing device is disclosed for an edge lighted panel wherein the device includes a thin transparent light transmitting base plate, a light diffusing layer formed on a front surface of the base plate and a light reflection surface formed in the vicinity of the rear surface of the base plate. The base plate and the light diffusing layer are integrally bonded together through an intermediate layer formed between the base plate and the light diffusing layer.
Inventors
- 👤 Makoto Ohe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:28
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133615; F; F21; F21V; F21V7/00; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0033; G02B6/005; G02B6/0051; G02B6/0055; G02B6/0066; G02B6/007; G02B6/0071; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
A process for producing a light diffusing device comprising; forming a transparent light transmitting base plate wherein at least one edge face of said base plate is a light incident face; forming a light diffusing layer on at least a first surface of said base plate; forming a light reflection surface in the vicinity of a second surface of said base plate; and forming an intermediate layer between said base plate and said light diffusing layer to integrally bond together said base plate and said light diffusing layer, said intermediate layer being formed through partial dissolution with methyl methacrylate monomer or a partial polymer thereof of said first surface of said base plate or said diffusing layer.
Claim 2
Dependent Claim
117 words
A process for producing a light diffusing device comprising; forming a transparent light transmitting base plate wherein at least one edge face of said base plate is a light incident face; forming a light diffusing layer on at least a first surface of said base plate; forming a light reflection surface in the vicinity of a second surface of said base plate; and forming an intermediate layer between said base plate and said light diffusing layer to integrally bond together said base plate and said light diffusing layer, said intermediate layer being formed through partial dissolution with methyl methacrylate monomer or a partial polymer thereof of said first surface of said base plate or said diffusing layer.
Claim 3
Dependent Claim
44 words
The process of claim 1, wherein said intermediate layer is formed through partial dissolution of said first surface of said base plate with methyl methacrylate monomer or a partial polymer thereof containing a light diffusing agent from which said light diffusing layer is formed.
Claim 4
Dependent Claim
14 words
The process of claim 1, wherein said base plate is made from polymethyl methacrylate.
Claim 5
Dependent Claim
31 words
The process of claim 1, wherein said intermediate layer is formed through partial dissolution of a surface of said light diffusing layer with methyl methacrylate monomer or a partial polymer thereof.
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) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |