LIGHT IRRADIATION SUBSTRATE

• US 20180043178A1
• Filed: 01/22/2016
• Published: 02/15/2018
• Est. Priority Date: 02/26/2015
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: IGUCHI, KATSUJI, KAWANISHI, HIDENORI, MORI, JUN, NAKANISHI, TOHRU
• Granted Patent: US 10,463,875 B2
• Time in Patent Office: Days
• CPC Class Codes: A61N 2005/063 comprising light transmitting means, e.g. optical fibres
• CPC Class Codes: A61N 2005/0645 Applicators worn by the patient
• CPC Class Codes: A61N 2005/0652 Arrays of diodes
• CPC Class Codes: A61N 5/0616 Skin treatment other than tanning
• CPC Class Codes: A61N 5/062 Photodynamic therapy, i.e. excitation of an agent

Abstract

A light irradiation substrate (1) includes plural unit substrates (10) that have a flexible substrate (11). A portion of the unit substrates (10) have a pair of external connection portions (21). A first surface of the flexible substrate (11) is provided with an LED chip (13) and a wire (12) for each of the unit substrates (10), and a second surface is provided with a back surface wire (19) across the unit substrates (10).

Claims

1. A light irradiation substrate comprising:

plural unit substrates that have a flexible substrate and are mutually detachable, wherein

a first surface of the flexible substrate has a light-emitting element and a first wire for each of the unit substrates,

a portion of the unit substrates among the unit substrates have at least one pair of external connection portions that supply power from an outside to the light-emitting element via the first wire, and

a second wire that is connected with the external connection portion and the first wire and supplies power from the external connection portion to the light-emitting element of the unit substrate which is not provided with the external connection portion via the first wire is provided on a second surface on an opposite side to the first surface on the flexible substrate and across the unit substrates in parallel.

3. The light irradiation substrate according to claim 1 or 2, wherein

the first wires of all the unit substrates are connected together in one line,

the second wire is provided across all the unit substrates, and

the light-emitting elements of all the unit substrates are connected in series.

4. The light irradiation substrate according to claim 1 or 2, wherein

the light-emitting elements of each of the unit substrates are arranged as a two-dimensional array along a first direction and a second direction that is orthogonal to the first direction, and

a distance between centers of the light-emitting elements that neighbor each other while facing a boundary between the neighboring unit substrates in the first direction is in a range that is 0.8 to 2 times as large as a distance between the centers of the light-emitting elements that neighbor each other in the first direction in each of the unit substrates.

5. The light irradiation substrate according to claim 1 or 2, wherein

the light-emitting elements of each of the unit substrates are arranged as a two-dimensional array along the first direction and the second direction that is orthogonal to the first direction,

the unit substrates are aligned only in the first direction, and

a double of a distance between an edge portion of the unit substrate in the second direction and the center of the light-emitting element that faces the edge portion is in a range of ±

20% of a distance between the centers of the light-emitting elements that neighbor each other in the second direction in each of the unit substrates.

2. A light irradiation substrate comprising:

plural unit substrates that have a flexible substrate and are mutually detachable, wherein

a first surface of the flexible substrate has a light-emitting element and a first wire for each of the unit substrates,

a portion of the unit substrates among the unit substrates have at least one pair of external connection portions that supply power from an outside to the light-emitting element via the first wire,

a second wire that is connected with the external connection portion and the first wire and supplies power from the external connection portion to the light-emitting element of the unit substrate which is not provided with the external connection portion via the first wire is provided on a second surface on an opposite side to the first surface on the flexible substrate and across the unit substrates,

the first wire is independently provided to each of the unit substrates,

the second wire has plural power supply lines that are arranged in parallel with each other,

the power supply lines extend from a connection portion with the external connection portion in the second wire to the unit substrates that are provided with the light-emitting elements to which power is supplied by the power supply lines and are electrically connected with the first wires of the unit substrates, and

the second wire connects, in parallel, the light-emitting element that is provided to the unit substrate which is provided with the external connection portion with the light-emitting element that is provided to the unit substrate which is not provided with the external connection portion, and differences in resistance values among the power supply lines are within 20%.