LED module

• US 10,641,437 B2
• Filed: 06/29/2017
• Issued: 05/05/2020
• Est. Priority Date: 06/30/2016
• Status: Active Grant

• Current Assignee: Nichia Corporation
• Original Assignee: Nichia Corporation
• Inventors: Miyoshi, Tomonori
• Primary Examiner(s): Carter, William J
• Application Number:
  US15/636,804
• Publication Number:
  US 20180003349A1
• Time in Patent Office: 1,041 Days
• Field of Search: 362227, 362235, 362242, 362243, 362247
• CPC Class Codes: F21K 9/62 using mixing chambers, e.g. housings with reflective walls
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 33/60 Reflective elements

Abstract

An LED module includes a mounting board and LED devices. The LED devices include at least one first LED device and second LED devices each including a light emitting diode element, a reflective member disposed lateral to the light emitting diode element, and a light transmissive member disposed above the light emitting diode element. The first LED device includes a reflective member on all lateral faces of the light transmissive member, and its upper face serves as a light extraction face. The second LED devices each includes the reflective member covering all of the lateral faces of the light transmissive member facing the at least one of the LED devices so that all of the lateral faces of the light transmissive members not facing any one of the LED devices and an upper face of a corresponding one of the second LED devices serve as light extraction faces.

Claims

1. An LED module comprising:

a mounting board; and

a plurality of LED devices arranged adjacent to one another on the mounting board, the LED devices including

at least one first LED device with all lateral faces facing corresponding ones of the plurality of LED devices, the at least one first LED device including a light emitting diode element, a light transmissive member disposed above the light emitting diode element, and a reflective member disposed lateral to all lateral faces of the light emitting diode element with the reflective member further covering all lateral faces of the light transmissive member so that an upper face of the at least one first LED device serves as a light extraction face, the reflective member being in contact with at least the light transmissive member, and

a plurality of second LED devices each having at least one lateral face facing at least one of the LED devices and at least one lateral face not facing any one of the LED devices, the second LED devices each including a light emitting diode element, a light transmissive member disposed above the light emitting diode element, and a reflective member disposed lateral to all lateral faces of the light emitting diode element with the reflective member further covering each of at least one lateral face of the light transmissive member facing the at least one of the LED devices with the reflective member not covering each of at least one lateral face of the light transmissive member not facing any one of the LED devices so that each of the at least one lateral face of the light transmissive member not facing any one of the LED devices and an upper face of a corresponding one of the second LED devices serve as light extraction faces, the reflective member being in contact with at least the light transmissive member, wherein

a part of the reflective member of one of the LED devices and a part of the reflective member of an adjacent one of the LED devices face each other while being spaced apart from each other.

2. The LED module according to claim 1, wherein

each of the reflective members disposed lateral to the light emitting diode element has an oblique face facing the light emitting diode element such that a distance from the light emitting diode element to the oblique face increases as a distance from the mounting board to the oblique face increases.

3. The LED module according to claim 2, wherein

the oblique face of each of the reflective members is curved.

4. The LED module according to claim 1, wherein

each of the reflective members extends downwardly from a position lateral to the light emitting diode element, and is disposed under the light emitting diode element.

5. The LED module according to claim 1, wherein

each of the reflective members includes white resin or a metal layer.

6. The LED module according to claim 1, wherein

the light transmissive member is made of light transmissive resin or glass.

7. The LED module according to claim 1, wherein

the light transmissive member contains at least one phosphor.

8. The LED module according to claim 1, wherein

the light transmissive member covers an entire path of light from the light emitting diode element.

9. The LED module according to claim 1, wherein

all of the light extraction faces are formed with the light transmissive member.

10. The LED module according to claim 1, wherein

each of the LED devices includes a second light transmissive member disposed between the reflective member and the light emitting diode element.

11. The LED module according to claim 10, wherein

the second light transmissive member is made of silicone resin or epoxy resin.

12. The LED module according to claim 1, wherein

a distance between adjacent ones of the LED devices is in a range from 0.2 mm to 1 mm.

13. The LED module according to claim 1, wherein

the LED devices are arranged in a matrix when viewed from the top.

14. The LED module according to claim 1, wherein

the LED devices are serially connected.

15. The LED module according to claim 1, wherein

the LED devices are disposed on an upper face and a lower face of the mounting board.

16. The LED module according to claim 1, wherein

the reflective member of the at least one first LED device includes a first portion disposed lateral to all the lateral faces of the light emitting diode element, and a second portion covering all the lateral faces of the light transmissive member, the first portion being separately formed from the second portion, and

the reflective member of each of the second LED devices includes a first portion disposed lateral to all the lateral faces of the light emitting diode element, and a second portion covering each of the at least one lateral face of the light transmissive member facing the at least one of the LED devices, the first portion being separately formed from the second portion.

17. An LED module comprising:

a mounting board; and

a plurality of LED devices arranged adjacent to one another on the mounting board, the LED devices including

at least one first LED device with all lateral faces facing corresponding ones of the plurality of LED devices, the at least one first LED device including a light emitting diode element, a light transmissive member disposed above the light emitting diode element, and a reflective member disposed lateral to all lateral faces of the light emitting diode element with the reflective member further covering all lateral faces of the light transmissive member so that an upper face of the at least one first LED device serves as a light extraction face, and

a plurality of second LED devices each having at least one lateral face facing at least one of the LED devices and at least one lateral face not facing any one of the LED devices, the second LED devices each including a light emitting diode element, a light transmissive member disposed above the light emitting diode element, and a reflective member disposed lateral to all lateral faces of the light emitting diode element with the reflective member further covering each of at least one lateral face of the light transmissive member facing the at least one of the LED devices with the reflective member not covering each of at least one lateral face of the light transmissive member not facing any one of the LED devices so that each of the at least one lateral face of the light transmissive member not facing any one of the LED devices and an upper face of a corresponding one of the second LED devices serve as light extraction faces and so that the each of at least one lateral face of the light transmissive member facing the at least one of the LED devices does not serve as a light extraction face.

18. The LED module according to claim 17, wherein

the reflective member of the at least one first LED device includes a first portion disposed lateral to all the lateral faces of the light emitting diode element, and a second portion covering all the lateral faces of the light transmissive member, the first portion being separately formed from the second portion, and

the reflective member of each of the second LED devices includes a first portion disposed lateral to all the lateral faces of the light emitting diode element, and a second portion covering each of the at least one lateral face of the light transmissive member facing the at least one of the LED devices, the first portion being separately formed from the second portion.