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US4733127A Expired / Lapsed US ⏱️ 0.0 years remaining

Unit of arrayed light emitting diodes

Assignee: Sanyo Electric Co Ltd
•
Filing: 1985-06-07
•
Granted: 1988-03-22
•
Expires: 2005-06-07
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Abstract

Abstract A unit of arrayed light emitting diodes in accordance with the present invention is formed in a manner in which gold paste or the like is applied by screen printing on a substrate (11) to form an elongate printed conductor (12) having a thickness of less than 40 μm, on which light emitting diode arrays (14) having a large number of light emitting areas (5) are disposed. The elongate printed conductor (12) comprises a plurality of printed thick films (121, 122 and 123), the lowermost thick film (121) for example being of a thickness of 10 μm or less, so that both longer side edges of the thick film (121) may have good linearity. Accordingly, using the parallel longer side edges of the elongate printed conductor (12) as reference lines, a plurality of light emitting diode arrays (14) can be disposed with good linearity. In addition, by decreasing a resistance value per unit length of the elongate printed conductor (12) to 1.1 mΩ/mm or less, the current capacity can be increased and the resistance can be lowered.

Inventors

  • 👤 Hiromi Takasu
  • 👤 Shigeru Sakaguchi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 13:21
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/30; B; B41; B41J; B41J2/00; B41J2/435; B41J2/447; B41J2/45; H10H; H10H29/00; H10H29/10; H10H29/14; H10W90/00; H10W72/071; H10W72/073; H10W72/075; H10W72/851; H10W72/874; H10W72/884; H10W90/701; H10W90/751; H10W90/754; H10W90/756

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 158 words
A unit of arrayed light emitting diodes comprising: a substrate, an elongate printed conductor formed on said substrate, light emitting diode arrays disposed on said elongate printed conductor and having a plurality of light emitting portions on the surface of said light emitting diode arrays, patterns formed on said substrate in the vicinity of said elongate printed conductor, for connecting said light emitting diode arrays, and a multi-layer connection formed on said substrate, said elongate printed conductor having at least one thick film of a thickness of 10 μm or less, said light emitting portions being arrayed over said plurality of light emitting diode arrays, the arrays of the light emitting portions being substantially parallel to a longer side edge of said elongate printed conductor, said patterns being fine patterns having a density of four lines or more per millimeter, and said multi-layer connection being formed remotely from said elongate printed conductor and not on said fine patterns.
Claim 2
Dependent Claim 158 words
A unit of arrayed light emitting diodes comprising: a substrate, an elongate printed conductor formed on said substrate, light emitting diode arrays disposed on said elongate printed conductor and having a plurality of light emitting portions on the surface of said light emitting diode arrays, patterns formed on said substrate in the vicinity of said elongate printed conductor, for connecting said light emitting diode arrays, and a multi-layer connection formed on said substrate, said elongate printed conductor having at least one thick film of a thickness of 10 μm or less, said light emitting portions being arrayed over said plurality of light emitting diode arrays, the arrays of the light emitting portions being substantially parallel to a longer side edge of said elongate printed conductor, said patterns being fine patterns having a density of four lines or more per millimeter, and said multi-layer connection being formed remotely from said elongate printed conductor and not on said fine patterns.
Claim 3
Dependent Claim 30 words
A unit of arrayed light emitting diodes in accordance with claim 1, wherein said multilayer connection includes a common connection for said light emitting diode array and a terminal portion.
Claim 4
Dependent Claim 55 words
A unit or arrayed light emitting diodes in accordance with claim 1, which further comprises drive devices disposed on said substrate, in the regions between said elongate printer conductor and multilayer connection so as to enable said light emitting diode array by selectively supplying a current to said light emitting portions through said fine patterns.

References Cited (Backward Citations)

US3315248A Cited
US3536830A Cited
US3967893A Cited
US4259679A Cited
US4445132A Cited
US4480261A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-03-22 1991-09-21 1992-03-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-03-22 1995-09-21 1996-03-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-03-22 1999-09-21 2000-03-22 $7700.00 Window Closed / Lapsed

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