Light emitting device

Patent metadata

Field	Value
Publication number	US-2026099112-A1
Application number	US-202519199482-A
Country	US
Kind code	A1
Filing date	May 6, 2025
Priority date	Oct 7, 2024
Publication date	Apr 9, 2026
Grant date	—

Abstract

A light emitting device includes: multiple light-emitting-element arrays each including multiple light emitting elements; a first wire commonly connected to the multiple light-emitting-element arrays; a second wire connected to each of groups of multiple light-emitting-element arrays obtained by dividing the multiple light-emitting-element arrays; and a transfer unit that includes multiple transfer thyristors and that performs lighting control on the multiple light emitting elements included in each of the multiple light-emitting-element arrays via the first wire and the second wire, in which the transfer thyristors are larger in number than the light-emitting-element arrays, and the transfer thyristors that are adjacent to each other are connected to a single first light-emitting-element array included in the multiple light-emitting-element arrays.

First claim

What is claimed is:

1 . A light emitting device comprising:
a plurality of light-emitting-element arrays each including a plurality of light emitting elements; a first wire commonly connected to the plurality of light-emitting-element arrays; a second wire connected to each of groups of multiple light-emitting-element arrays obtained by dividing the plurality of light-emitting-element arrays; and a transfer unit that includes a plurality of transfer thyristors and that performs lighting control on the plurality of light emitting elements included in each of the plurality of light-emitting-element arrays via the first wire and the second wire, wherein the transfer thyristors are larger in number than the light-emitting-element arrays, and the transfer thyristors that are adjacent to each other are connected to a single first light-emitting-element array included in the plurality of light-emitting-element arrays.

2 . The light emitting device according to claim 1 ,
wherein a second light-emitting-element array included in the plurality of light-emitting-element arrays is adjacent to the first light-emitting-element array and is lit simultaneously with the first light-emitting-element array, the second light-emitting-element array being connected to the transfer thyristor disposed further adjacent to the transfer thyristor connected to the first light-emitting-element array.

3 . The light emitting device according to claim 2 ,
wherein the plurality of light emitting elements included in the first light-emitting-element array are arranged long in a direction in which the light-emitting-element arrays to be simultaneously lit are adjacent to each other.

4 . The light emitting device according to claim 3 ,
wherein the plurality of light-emitting-element arrays include two light-emitting-element arrays arranged in the direction of adjacency and n light-emitting-element arrays arranged in a direction orthogonal to the direction of adjacency, n being an integer larger than or equal to 2.

5 . The light emitting device according to claim 2 ,
wherein two chips are disposed opposing each other, each chip being constituted by a combination of the transfer unit and the plurality of light-emitting-element arrays, and wherein the light-emitting-element arrays in the two chips are simultaneously lit in a direction in which the light-emitting-element arrays are adjacent to each other.

6 . The light emitting device according to claim 5 ,
wherein the two chips share a line connected to the first wire.

7 . The light emitting device according to claim 6 ,
wherein the two chips disposed opposing each other have substantially line-symmetrical configurations.

8 . The light emitting device according to claim 6 ,
wherein the two chips have substantially mirror-symmetrical connections with respect to the first wire and the second wire that connect the light-emitting-element arrays and the transfer unit to each other, and share a line connected to the second wire.

9 . The light emitting device according to claim 6 ,
wherein the two chips disposed opposing each other have substantially point-symmetrical configurations.

Assignees

• Fujifilm Business Innovation Corp

Inventors

• Takeyama Kei

Classifications

• H10W90/00

  Package configurations · CPC title

• H10W70/65

  Shapes or dispositions of interconnections · CPC title

• B41J2/447

  using arrays of radiation sources (B41J2/475 takes precedence) · CPC title

• G03G15/04036

  Details of illuminating systems, e.g. lamps, reflectors (lamp housings for copying cameras, reflex exposure lighting G03B27/542) · CPC title

• G03G15/043 Primary

  with means for controlling illumination or exposure (G03G15/041 takes precedence) · CPC title