US4956684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printer head with light emitting element array
Assignee: Sanyo Electric Co Ltd
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Filing: 1988-09-20
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Granted: 1990-09-11
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Expires: 2008-09-20
Abstract
Abstract A printer head has an LED element array which is composed of a plurality of LED chips having a predetermined number of LED elements. In order to reduce the contrast of image forming light profile, end portions of a light emitting portion of the LED element are coated with an SiN film.
Inventors
- 👤 Manabu Urata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:13
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/84; B; B41; B41J; B41J2/00; B41J2/435; B41J2/447; B41J2/45; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1238; G06K15/1242; G06K15/1247; H10H29/00; H10H29/10; H10H29/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
A printer head having an array of light emitting elements, comprising: a plurality of light emitting portions formed on a substrate; electrode portions disposed on said respective light emitting portions; and transparent film disposed only on edge portions of said respective light emitting portions in an aligning direction of the array.
Claim 2
Dependent Claim
51 words
A printer head having an array of light emitting elements, comprising: a plurality of light emitting portions formed on a substrate; electrode portions disposed on said respective light emitting portions; and transparent film disposed only on edge portions of said respective light emitting portions in an aligning direction of the array.
Claim 3
Dependent Claim
58 words
A printer head having an array of light emitting elements as claimed in claim 1, wherein said array of light emitting elements comprises a plurality of chips, each of said chips having a predetermined number of said light emitting elements, whereby selected ones of said edge portions of said light emitting portions are covered with said transparent film.
Claim 4
Dependent Claim
23 words
A printer head having an array of light emitting elements as claimed in claim 1, wherein said transparent film is made of SiN.
Claim 5
Dependent Claim
25 words
A printer head having an array of light emitting elements as claimed in claim 1, wherein said light emitting element is a light emitting diode.
Claim 6
Dependent Claim
47 words
A printer head having an array of light emitting elements as claimed in claim 1, wherein each of said electrode portions is disposed on each of said light emitting portions so as to cover a center area thereof, said center area extending perpendicularly to said aligning direction.
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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) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |