Patent US4354115A successfully refreshed from Google Patents.
US4354115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocoupling device
Assignee: Hitachi Ltd
•
Filing: 1980-11-28
•
Granted: 1982-10-12
•
Expires: 2000-11-28
Abstract
Abstract A photo-coupler for electricity-light-electricity conversion comprising: (1) a light emitting part; (2) a photosensing device comprising a plurality of photosensing elements electrically connected in series in a light receiving surface of an insulating substrate, said photosensing elements being radially arrayed in said light receiving surface; and (3) a light guiding means optically coupling said light emitting part and said photosensing device, whereby light is emitted from said light emitting part and directed through said light guiding means to said photosensing device to generate a photoelectric conversion output.
Inventors
- 👤 Terunori Warabisako
- 👤 Shigeo Shiono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:35
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/80; H04B10/801; H10; H10F; H10F55/00; H10F55/20; H10F55/25; H10F77/00; H10F77/10; H10F77/14; H10F77/147; Y; Y02; Y02E; Y02E10/00; Y02E10/50
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
87 words
A photo-coupler for electricity-light-electricity conversion comprising: (1) a light emitting part; (2) a photosensing device comprising a plurality of photosensing elements electrically connected in series in a light receiving surface of an insulating substrate, said photosensing elements being radially arrayed in said light receiving surface; and (3) a light guiding means optically coupling said light emitting part and said photosensing device, whereby light is emitted from said light emitting part and directed through said light guiding means to said photosensing device to generate a photoelectric conversion output.
Claim 2
Dependent Claim
87 words
A photo-coupler for electricity-light-electricity conversion comprising: (1) a light emitting part; (2) a photosensing device comprising a plurality of photosensing elements electrically connected in series in a light receiving surface of an insulating substrate, said photosensing elements being radially arrayed in said light receiving surface; and (3) a light guiding means optically coupling said light emitting part and said photosensing device, whereby light is emitted from said light emitting part and directed through said light guiding means to said photosensing device to generate a photoelectric conversion output.
Claim 3
Dependent Claim
19 words
A photo-coupler as claimed in claim 1, wherein said light emitting part is a plurality of light emitting diodes.
Claim 4
Dependent Claim
21 words
A photo-coupler as claimed in claim 1 or 2, wherein said light guiding means is made of an electrically insulating material.
Claim 5
Dependent Claim
18 words
A photo-coupler as claimed in claim 3, wherein said light guiding means is made of glass or ceramic.
Claim 6
Dependent Claim
27 words
A photo-coupler as claimed in claim 1, wherein said photosensing elements are electrically connected in series by lead portions disposed external to the array of photosensing elements.
Claim 7
Dependent Claim
29 words
A photocoupler device as claimed in claim 1, wherein each of said photosensing elements extends from the central portion of said light receiving surface to the peripheral portion thereof.
Claim 8
Dependent Claim
68 words
A photocoupler device as claimed in claim 6, wherein each of said photosensing elements has a central angle of 360°/n, where n is the number of said photosensing elements, the two sides defining each central angle extend radially from the central portion of said light receiving surface, and said photosensing elements are electrically connected in series with each other at the peripheral portion of said light receiving surface.
Claim 9
Dependent Claim
82 words
A photocoupler device as claimed in claim 1, 6 or 7, wherein said substrate is provided with a plurality of metalization patterns at positions corresponding to said plural photosensing elements respectively, said metalization patterns including lead portions disposed external to the array of said photosensing elements, and each of said photosensing elements is electrically connected at its back surface electrode to one of said metalization patterns and at its front surface electrode to the lead portion of the next adjacent metalization pattern.
Claim 10
Dependent Claim
33 words
A photocoupler device as claimed in claim 8, wherein the lead portion of said metalization pattern is connected to the front surface electrode of said photosensing element by bonding a lead wire therebetween.
Claim 11
Dependent Claim
42 words
A photocoupler device as claimed in claim 8, further comprising a cover provided with a metalized layer, the lead portion of said metalization pattern being connected to the front surface electrode of said photosensing element by a portion of said metalized layer.
Claim 12
Dependent Claim
38 words
A photocoupler device as claimed in claim 10, wherein said cover is bonded by solder bonding to said photosensing elements by the connection of said portion of said metalized layer with said lead portion of said metalization pattern.
Claim 13
Dependent Claim
22 words
A photocoupler device as claimed in claim 10, wherein said cover has an opening through which light passes towards said photosensing elements.
Claim 14
Dependent Claim
23 words
A photocoupler device as claimed in claim 8, wherein said substrate is made of epoxi-glass, and said metalization patterns are provided by copper.
Claim 15
Dependent Claim
27 words
A photocoupler device as claimed in claim 8, wherein said substrate is made of a ceramic material, and said metalization patterns are provided by gold plated molybdenum.
References Cited (Backward Citations)
US3480783A
Cited
US3560750A
Cited
US3427797A
Cited
US3786624A
Cited
US3890776A
Cited
US4001704A
Cited
US4118633A
Cited
US4124860A
Cited
US4087960A
Cited
US4074143A
Cited
US4112308A
Cited
US4068121A
Cited
US4151005A
Cited
US4210923A
Cited
US4249959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |