US4040727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transflector
Assignee: Boeing North American Inc
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Filing: 1975-09-10
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Granted: 1977-08-09
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Expires: 1995-09-10
Abstract
Abstract There is provided an efficient semi-transparent reflector (transflector) which reflects direct light under normal, ambient light conditions but permits back lighting of a display, such as an LCD display, under dark ambient light conditions. Such a "transflector" is inexpensive to manufacture and provides an efficient device in which the pattern and body color of the reflector can easily be changed.
Inventors
- 👤 Richard D. Ketchpel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:56
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133553; G02F1/133555; G02B; G02B5/00; G02F2203/00; G02F2203/09
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
A transflector comprising, a sheet of light transmitting material having an undulating surface, and a discontinuous film of light reflecting material on said surface of said sheet forming a plurality of islands which exhibit a fissured pattern running in one direction across said sheet, said film arranged to reflect substantial portions of incident light to prevent incident light from passing through said sheet and to permit light to be transmitted through said sheet from a light source behind said sheet.
Claim 2
Dependent Claim
80 words
A transflector comprising, a sheet of light transmitting material having an undulating surface, and a discontinuous film of light reflecting material on said surface of said sheet forming a plurality of islands which exhibit a fissured pattern running in one direction across said sheet, said film arranged to reflect substantial portions of incident light to prevent incident light from passing through said sheet and to permit light to be transmitted through said sheet from a light source behind said sheet.
Claim 3
Dependent Claim
24 words
The transflector recited in claim 1 wherein said islands are formed of metals and oxides of semiconductors, deposited on said surface of said sheet.
Claim 4
Dependent Claim
14 words
The transflector recited in claim 2 wherein said metal is a light reflective metal.
Claim 5
Dependent Claim
23 words
The transflector recited in claim 1 wherein said discontinuous film comprises discrete portions which are arranged at an angle relative to each other.
Claim 6
Dependent Claim
14 words
The transflector recited in claim 1 wherein said sheet comprises a transparent plastic material.
Claim 7
Dependent Claim
40 words
The transflector recited in claim 1 wherein said surface of said sheet has a wavelength of about 200 to 600 microns between crests of raised portions thereof and said crests have an amplitude of at least 4% of the wavelength.
Claim 8
Dependent Claim
20 words
The transflector recited in claim 1 wherein said surface exhibits a random variation in the wavelength, amplitude and orientation thereof.
Claim 9
Dependent Claim
21 words
The transflector recited in claim 1 wherein said sheet is fabricated of vinyl, and said surface of said sheet is calendared.
Claim 10
Dependent Claim
23 words
The transflector recited in claim 4 wherein, said discrete portions which are arranged at an angle relative to each other exhibit different colors.
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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |