US4605944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
LED array device for printer
Assignee: Sanyo Electric Co Ltd
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Filing: 1984-09-11
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Granted: 1986-08-12
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Expires: 2004-09-11
Abstract
Abstract An LED array device includes a plurality of LED units and a board for supporting the plurality of LED units. Each LED unit has a plurality of LED elements aligned straight in a predetermined pitch with a predetermined spacing between neighboring LED elements. The plurality of LED units are aligned straight with their end edges confronting each other such that an array of LED elements on one LED unit is in alignment with an array of LED elements on a next LED unit with the predetermined pitch being maintained. A spacing between an LED element positioned at the end of the alignment on the LED unit and the end edge of the LED unit is less than a half of the predetermined spacing.
Inventors
- 👤 Toshihiko Ishii
- 👤 Hiromi Takasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:38
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/01; H10H20/011; H10H20/013; B; B41; B41J; B41J2/00; B41J2/435; B41J2/447; B41J2/45; H10H29/00; H10H29/10; H10H29/14; Y; Y10; Y10S; Y10S257/00; Y10S257/926
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
125 words
An LED array device comprising: a plurality of LED units, each having a plurality of LED elements aligned straight in a predetermined pitch with a predetermined spacing between neighboring LED elements, said plurality of LED units aligned straight with their end edges confronting each other such that an array of LED elements on one LED unit is in alignment with an array of LED elements on a next LED unit with said predetermined pitch being maintained, a spacing between an LED element positioned at the end of said LED unit and said end edge of said LED unit being less than a half of said predetermined spacing; an electrode means extending from each LED element; and board means for supporting said plurality of LED units.
Claim 2
Dependent Claim
125 words
An LED array device comprising: a plurality of LED units, each having a plurality of LED elements aligned straight in a predetermined pitch with a predetermined spacing between neighboring LED elements, said plurality of LED units aligned straight with their end edges confronting each other such that an array of LED elements on one LED unit is in alignment with an array of LED elements on a next LED unit with said predetermined pitch being maintained, a spacing between an LED element positioned at the end of said LED unit and said end edge of said LED unit being less than a half of said predetermined spacing; an electrode means extending from each LED element; and board means for supporting said plurality of LED units.
Claim 3
Dependent Claim
120 words
A wafer comprising: a base made of a semiconductor; a plurality of LED elements formed on said base and aligned in first and second directions which are orthogonal to each other, the alignment of said LED elements in said first direction being a first LED unit such that a predetermined number of LED elements are aligned with a first predetermined spacing between neighboring LED elements, and that a second LED unit with an alignment of said predetermined number of LED elcments is repeated with a second predetermined spacing between adjacent LED elements of said first and second LED units which second predetermined spacing is less than said first predetermined spacing; and an electrode extending from each of said LED elements.
Claim 4
Dependent Claim
120 words
A wafer comprising: a base made of a semiconductor; a plurality of LED elements formed on said base and aligned in first and second directions which are orthogonal to each other, the alignment of said LED elements in said first direction being a first LED unit such that a predetermined number of LED elements are aligned with a first predetermined spacing between neighboring LED elements, and that a second LED unit with an alignment of said predetermined number of LED elcments is repeated with a second predetermined spacing between adjacent LED elements of said first and second LED units which second predetermined spacing is less than said first predetermined spacing; and an electrode extending from each of said LED elements.
Claim 5
Dependent Claim
65 words
An LED unit comprising: a base made of a semiconductor; a plurality of LED elements formed on said base and aligned straight in a predetermined pitch with a predetermined spacing between neighboring LED elements, a spacing between an LED element positioned at the end of said LED elements and a corresponding end edge of said base being less than a half of said predetermined spacing.
Claim 6
Dependent Claim
65 words
An LED unit comprising: a base made of a semiconductor; a plurality of LED elements formed on said base and aligned straight in a predetermined pitch with a predetermined spacing between neighboring LED elements, a spacing between an LED element positioned at the end of said LED elements and a corresponding end edge of said base being less than a half of said predetermined spacing.
Claim 7
Dependent Claim
35 words
An LED unit as claimed in claim 3, wherein said base has an indentation formed at said end edge and at a portion below said LED element positioned at the end of the said alignment.
Claim 8
Dependent Claim
19 words
An LED unit as claimed in claim 3, wherein said base comprises GaAs O .6 P O .4 layer.
Claim 9
Dependent Claim
92 words
An LED unit as claimed in claim 3, wherein each of said LED elements comprises: a mask deposited on said base said mask having a opening; a first region having one of the two conductivity types and being defined in said base substantially in alignment with said opening, said first region defining a PN junction at a boundary thereof, serving as a light emitting portion; and a second region having an other of the two conductivity types and being defined in said base at a portion at least surrounding said first region.
Claim 10
Dependent Claim
22 words
An LED unit as claimed in claim 6, wherein said first region has a diffusing surface smaller than a diffused bottom area.
Claim 11
Dependent Claim
24 words
An LED unit as claimed in claim 6, wherein said first region is a P-type and said second region is an over compensated N-type.
Claim 12
Dependent Claim
21 words
An LED unit as claimed in claim 6, wherein said first region is formed by the diffusion of zinc for dopant.
Claim 13
Dependent Claim
23 words
An LED unit as claimed in claim 9, wherein said second region is formed by the diffusion of sulfur or tellurium for dopant.
Claim 14
Dependent Claim
29 words
An LED unit as claimed in claim 3, further comprising a common electrode deposited on said base on a surface opposite to the surface provided with said first region.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |