Light irradiation device

Patent metadata

Field	Value
Publication number	US-10317049-B2
Application number	US-201615776749-A
Country	US
Kind code	B2
Filing date	Nov 2, 2016
Priority date	Nov 16, 2015
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A light irradiation device includes a plurality of light-emitting portions that emit light by being supplied with a current. The light-emitting portions each have a first power supply terminal, and a second power supply terminal; a plurality of light-emitting elements; and a wiring pattern. The wiring pattern has a first wiring region and a second wiring region. Two of the light-emitting portions that are disposed adjacent to each other are disposed such that the space between the respective first wiring regions or the space between the respective second wiring regions is smaller than the space between the first wiring region of one of the light-emitting portions and the second wiring region of the other of the light-emitting portions.

First claim

The invention claimed is:

1. A light irradiation device comprising:
a plurality of substrates; and
a plurality of light emitting units mounted on each of the plurality of substrates that emit light when current is supplied, wherein
each of the plurality of light emitting units includes
a first feeding terminal indicating anode polarity and a second feeding terminal indicating cathode polarity, connected to a power supply,
a light emitting element group including a plurality of light emitting elements that are connected in series and are connected in parallel, and
a wiring pattern formed so as to electrically connect the first feeding terminal, the light emitting element group, and the second feeding terminal in series,

the wiring pattern includes
a first wiring area located between the first feeding terminal and a light emitting element arranged in a position electrically the closest to the first feeding terminal, and
a second wiring area located between the second feeding terminal and a light emitting element arranged in a position electrically the closest to the second feeding terminal, and

in two light emitting units from among the plurality of light emitting units mounted on two adjacently arranged substrates from among the plurality of substrates, first wiring areas or second wiring areas are arranged with an interval narrower than an interval between the first wiring area of one light emitting unit and the second wiring area of the other light emitting unit.

2. The light irradiation device according to claim 1 , wherein
in two adjacently arranged light emitting units out of the plurality of light emitting units, a direction from the first wiring area to the second wiring area in one light emitting unit is different from a direction from the first wiring area to the second wiring area in the other light emitting unit.

3. The light irradiation device according to claim 1 , wherein
in two adjacently arranged light emitting units out of the plurality of light emitting units, a direction from the first wiring area to the second wiring area in one light emitting units is opposite to a direction from the first wiring area to the second wiring area in the other light emitting unit.

4. The light irradiation device according to claim 1 , wherein
in all the adjacently arranged light emitting units out of the plurality of light emitting units, the first wiring areas or the second wiring areas are arranged with the interval narrower than the interval between the first wiring area of one light emitting unit and the second wiring area of the other light emitting unit.

5. The light irradiation device according to claim 1 , wherein
each of the plurality of light emitting units includes two first feeding terminals and two second feeding terminals, and
the first feeding terminals are arranged so as to face each other across the plurality of light emitting elements and the second feeding terminals are arranged so as to face each other across the plurality of light emitting elements.

6. The light irradiation device according to claim 2 , wherein
in two adjacently arranged light emitting units out of the plurality of light emitting units, a direction from the first wiring area to the second wiring area in one light emitting units is opposite to a direction from the first wiring area to the second wiring area in the other light emitting unit.

7. The light irradiation device according to claim 2 , wherein
in all the adjacently arranged light emitting units out of the plurality of light emitting units, the first wiring areas or the second wiring areas are arranged with the interval narrower than the interval between the first wiring area of one light emitting unit and the second wiring area of the other light emitting unit.

8. The light irradiation device according to claim 3 , wherein
in all the adjacently arranged light emitting units out of the plurality of light emitting units, the first wiring areas or the second wiring areas are arranged with the interval narrower than the interval between the first wiring area of one light emitting unit and the second wiring area of the other light emitting unit.

9. The light irradiation device according to claim 6 , wherein
in all the adjacently arranged light emitting units out of the plurality of light emitting units, the first wiring areas or the second wiring areas are arranged with the interval narrower than the interval between the first wiring area of one light emitting unit and the second wiring area of the other light emitting unit.

10. The light irradiation device according to claim 2 , wherein
each of the plurality of light emitting units includes two first feeding terminals and two second feeding terminals, and
the first feeding terminals are arranged so as to face each other across the plurality of light emitting elements and the second feeding terminals are arranged so as to face each other across the plurality of light emitting elements.

11. The light irradiation device according to claim 3 , wherein
each of the plurality of light emitting units includes two first feeding terminals and two second feeding terminals, and
the first feeding terminals are arranged so as to face each other across the plurality of light emitting elements and the second feeding terminals are arranged so as to face each other across the plurality of light emitting elements.

12. The light irradiation device according to claim 4 , wherein
each of the plurality of light emitting units includes two first feeding terminals and two second feeding terminals, and
the first feeding terminals are arranged so as to face each other across the plurality of light emitting elements and the second feeding terminals are arranged so as to face each other across the plurality of light emitting elements.

13. The light irradiation device according to claim 6 , wherein
each of the plurality of light emitting units includes two first feeding terminals and two second feeding terminals, and
the first feeding terminals are arranged so as to face each other across the plurality of light emitting elements and the second feeding terminals are arranged so as to face each other across the plurality of light emitting elements.

14. The light irradiation device according to claim 7 , wherein
each of the plurality of light emitting units includes two first feeding terminals and two second feeding terminals, and
the first feeding terminals are arranged so as to face each other across the plurality of light emitting elements and the second feeding terminals are arranged so as to face each other across the plurality of light emitting elements.

15. The light irradiation device according to claim 8 , wherein
each of the plurality of light emitting units includes two first feeding terminals and two second feeding terminals, and
the first feeding terminals are arranged so as to face each other across the plurality of light emitting elements and the second feeding terminals are arranged so as to face each other across the plurality of light emitting elements.

16. The light irradiation device according to claim 9 , wherein
each of the plurality of light emitting units includes two first feeding terminals and two second feeding terminals, and
the first feeding terminals are arranged so as to face each other across the plurality of light emitting elements and the second feeding terminals are arranged so as to face each other across the plurality of light emitting elements.

Assignees

• Ushio Electric Inc

Inventors

• Inoue Takahiro
• Matsushima Takeo
• Nakajima Toshihiro
• Kinoshita Junichi
• Ishida Kenji

Classifications

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• H05K2201/10106

  Light emitting diode [LED] · CPC title

• H05K1/02

  Details · CPC title

• H05K1/0296

  Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295 (H05K1/11 takes precedence; lay-out adapted to mounted component configuration H05K1/18) · CPC title

• F21Y2103/10

  comprising a linear array of point-like light-generating elements · CPC title