US4257084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device
Assignee: Individual
•
Filing: 1979-02-21
•
Granted: 1981-03-17
•
Expires: 1999-02-21
Abstract
Abstract A light-projection device for digital instrumentation consists of a one-piece body including reflective and diffusive surfaces and a chamber to locate a plurality of sources of varicolored light. Light from the sources is diffused to fill an entire line segment of the seven in a typical digit, with varicolored sources of light affording the potential for polychromatic display, thus enhancing the data with color to signify danger, normality, negative values, et cetera.
Inventors
- 👤 Christopher H. Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:48
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0066; G02B6/0068; G01; G01D; G01D11/00; G01D11/28; G02B6/0013; G02B6/0015; G02B6/0018; G02B6/0033; G02B6/0035; G02B6/004; G02B6/0043; Y; Y10; Y10S; Y10S362/00; Y10S362/80
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A light-projecting device comprising an integral unit of material that is at least translucent, said unit including light-diffusing surfaces, a chamber dimensioned to accommodate a plurality of sources of varicolored light, and reflecting surface disposed at an angle relative to said light diffusing surfaces such as to reflect by means of total internal reflection the light cast from the chamber to said diffusing surfaces which ar textured to cast said light towards the user.
Claim 2
Dependent Claim
74 words
A light-projecting device comprising an integral unit of material that is at least translucent, said unit including light-diffusing surfaces, a chamber dimensioned to accommodate a plurality of sources of varicolored light, and reflecting surface disposed at an angle relative to said light diffusing surfaces such as to reflect by means of total internal reflection the light cast from the chamber to said diffusing surfaces which ar textured to cast said light towards the user.
Claim 3
Dependent Claim
14 words
The device of claim 1 in which the reflective surface includes a reflective coating.
Claim 4
Dependent Claim
14 words
The device of claim 1 in which the diffusing surfaces include a diffusive coating.
Claim 5
Dependent Claim
17 words
The device of claim 1 and means supporting a plurality of varicolored light sources in said chamber.
Claim 6
Dependent Claim
12 words
The device of claim 4 in which the light sources are light-emitting-diodes.
Claim 7
Dependent Claim
40 words
The device of claim 1 in which the reflecting surface is aligned with said light diffusing surfaces and disposed to define with the proximal end portion thereof an obtuse angle, and said proximal end at least partly overlying said chamber.
Claim 8
Dependent Claim
20 words
The device of claim 4 in which the light sources include a plurality of monochromatic light sources for each color.
Claim 9
Dependent Claim
25 words
A plurality of the devices of claim 1 configured to form symbols, digits, numerals, or characters so as to be useful for the display thereof.
References Cited (Backward Citations)
US2195672A
Cited
US2566026A
Cited
US2585503A
Cited
US3040168A
Cited
US3821590A
Cited
US3823550A
Cited
US3828182A
Cited
US4059916A
Cited
US4082029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |