LED Illumination Device with Speaker Function, and Method for Extracting Light and Sound From LED Illumination Device with Speaker Function

Patent metadata

Field	Value
Publication number	US-2020173644-A1
Application number	US-202016739912-A
Country	US
Kind code	A1
Filing date	Jan 10, 2020
Priority date	Jul 11, 2017
Publication date	Jun 4, 2020
Grant date	—

Abstract

A frame member is attached to an opening in an outer light-reflection plate. The frame member is composed of an inner frame part, and an outer frame part disposed around the inner frame part. A light extraction part is formed between the outer frame part and the inner frame part. The inner frame part is constituted by a separate extraction part that extracts acoustic vibrations and light. A space of the separate extraction part includes, on both ends, a sound intake port on an internal space side where a sound source is disposed, and a sound extraction port formed in the top of the inner frame part so as to open toward the outside of an LED illumination device. The sound intake port and the sound extraction port are formed separated from each other by a prescribed distance, and the space is formed continuously in the inner frame part so as to connect the sound intake port and the sound extraction port.

First claim

What is claimed is:

1 . An LED illumination device with a speaker function, comprising:
an outer light-reflection plate that is in a concave shape having an opening portion, the outer light-reflection plate also serving as an outer frame body; an inner light-reflection plate that is disposed at a position facing the outer light-reflection plate, the inner light-reflection plate also serving as an inner frame body; a frame member attached to the opening portion, the frame member being formed with an extraction part from which light is extracted; an LED light source that is disposed in a space formed between facing surfaces of the inner light-reflection plate and the outer light-reflection plate, and a sound source that is disposed in the space at a position that is different from the position at which the LED light source is disposed, or is disposed on a reverse surface of the outer light-reflection plate, wherein: the opening portions of the outer light-reflection plate and the inner light-reflection plate are fixed to the frame member; and the frame member inside the illumination device is formed with a separate extraction part that can extract sound and light from an inside to an outside of the illumination device.

2 . The LED illumination device with a speaker function according to claim 1 , wherein:
either the LED light source and a connection portion of the sound source, to which the sound source directly gives vibration, are disposed facing each other at a substantially center of the space, or the LED light source is disposed at a substantially center of an inner surface of the outer light-reflection plate and the sound source is disposed at a substantially center of an outer surface of the outer light-reflection plate, and the frame member includes an inner frame part, an outer frame part, and a light extraction part; the light extraction part is formed between the inner frame part and the outer frame part or on outside of the inner flame part so as to adjoin either the inner frame part or the outer frame part; the opening portion of the outer light-reflection plate is fixed to the outer frame part of the frame member; the opening portion of the inner light-reflection plate is fixed to the inner frame part; either the outer frame part or the inner frame part includes the separate extraction part; and the separate extraction part comprises a sound and light extraction space formed inside the illumination device, the sound and light extraction space has a predetermined length, and sound generated by vibration of the sound source can be extracted from the separate extraction part directly to the outside of the illumination device.

3 . The LED illumination device with a speaker function according to claim 2 , wherein:
the separate extraction part includes a sound and light intake port and a sound and light extraction port either at the outer frame part or at the inner frame part, or on the outside of the inner frame part so as to adjoin the inner frame part, the sound and light intake port being on a side of an inner space in which the sound source and the LED light source are disposed, and the sound and light extraction port opening to the outside of the illumination device; and the sound and light intake port and the sound and light extraction port are formed to be connected continuously being a predetermined distance away from each other.

4 . The LED illumination device with a speaker function according to claim 2 , wherein the sound source is disposed at a substantially center of one of the outer light-reflection plate and the inner light-reflection plate, and one or a plurality of the LED light sources are provided at a substantially center of either the outer light-reflection plate or the inner light-reflection plate on which the sound source is not disposed.

5 . The LED illumination device with a speaker function according to claim 2 , wherein the inner light-reflection plate is disposed on a bottom surface of the inner frame part directly or via a circuit board so as to face the outer light-reflection plate.

6 . The LED illumination device with a speaker function according to claim 2 , wherein the separate extraction part is formed in the inner frame part, an inner storage part is formed inside of the separate extraction part, an inner illumination space is formed provided with a light reflection plate on an inner surface of the inner storage part, an inner LED light source is provided at any position of the inner illumination space, and, furthermore, a light extraction member is disposed at the light extraction part which extracts light from the inner illumination space.

7 . The LED illumination device with a speaker function according to claim 2 , wherein the separate extraction part is formed in the inner frame part, an inner storage part is formed inside of the separate extraction part, a plurality of storage sections are formed in the inner storage part, an inner LED light source is disposed in the storage section in a center portion, and one or a plurality of switches are disposed in the storage sections on the outer sides.

8 . The LED illumination device with a speaker function according to claim 3 , wherein the separated extraction part includes a waveguide space that forms a bent waveguide in which the sound and light intake port is disposed at an angle so as not to be seen from the sound and light extraction port, and the separate extraction part inhibits light guided from the inside from emitting directly out of the sound and light extraction port.

9 . The LED illumination device with a speaker function according to claim 3 , wherein a width of the sound and light intake port, a width of the sound and light extraction port, and a width of the sound and light extraction space connecting the sound and light intake port with the sound and light extraction port in the separate extraction part are all set between 2 and 10 mm, which is larger than a wavelength of light from the LED light source, smaller than a wavelength of sound taken out of the sound source, and equal to or less than a wavelength of a sound wave in a human audible range.

10 . The LED illumination device with a speaker function according to claim 2 , wherein an inner surface of the sound and light extraction space of the separate extraction part is formed of a light reflection member.

11 . The LED illumination device with a speaker function according to claim 2 , wherein an inner surface of the sound and light extraction space of the separate extraction part is formed of a light-absorbing member, or an anti-reflection film is formed on the inner surface of the sound and light extraction space.

12 . The LED illumination device with a speaker function according to claim 2 , wherein luminance of light extracted from the light extraction part is stronger than intensity of light extracted from the separate extraction part, and sound extracted from the separate extraction part is louder than sound extracted from the light extraction part.

13 . The LED illumination device with a speaker function according to claim 2 , wherein:
the outer light-reflection plate is a light reflection plate made of micro foam resin, which also serves as an acoustic vibration plate; the outer light-reflection plate is any one of PET resin, PC resin, acrylic resin, and flame-retardant acrylic resin; and when an aluminum oxide light reflection plate is taken as a standard plate, a ratio of light reflectivity of the outer light-reflection plate to that of the aluminum oxide light reflection plate is 90% or more for total reflectivity and 90% or more for diffusive reflectivit

Assignees

• Furukawa Electric Co Ltd

Inventors

• Yamamoto Syunji
• Kubota Tetsuji
• Kabumoto Akira
• Okumura Masahiro

Classifications

• H04R1/025

  Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture · CPC title

• F21V33/0056 Primary

  Audio equipment, e.g. music instruments, radios or speakers · CPC title

• H04R17/00

  Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00}) · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• G10K11/22

  for conducting sound through hollow pipes, e.g. speaking tubes · CPC title