Phosphor wheel device, phosphor wheel device accommodating housing and projection-type image display device

Patent metadata

Field	Value
Publication number	US-9664893-B2
Application number	US-201514852015-A
Country	US
Kind code	B2
Filing date	Sep 11, 2015
Priority date	Sep 17, 2014
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A phosphor wheel device includes: a phosphor wheel; a motor; and a plurality of blades. The phosphor wheel has: a disc-shaped substrate; and a phosphor disposed on one surface of the substrate in a circumferential direction. The motor rotatably drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to be integrally rotated with the phosphor wheel, and extend in a radial direction of the phosphor wheel from an axis of rotation of the motor.

First claim

What is claimed is:

1. A phosphor wheel device comprising:
a phosphor wheel having: a disc-shaped substrate and a phosphor disposed on one surface of the substrate in a circumferential direction;
a motor which rotatably drives the phosphor wheel; and
a fan member fixed to the other surface of the substrate so as to be integrally rotated with the phosphor wheel, having a plurality of blades extending in a radial direction of the phosphor wheel from an axis of rotation of the motor, and formed of a material different from a material that forms the substrate.

2. The phosphor wheel device according to claim 1 , wherein the blades are disposed on the other surface of the substrate such that the blades are positioned more inside than a position of the phosphor.

3. The phosphor wheel device according to claim 2 , wherein a distance from the blades to the phosphor is set to equal to or larger than a height of the blades.

4. The phosphor wheel device according to claim 1 , wherein the fan member is formed by bending a stainless steel plate.

5. The phosphor wheel device according to claim 1 , wherein at least a region, where the phosphor is disposed, of the one surface of the substrate has undergone a surface treatment such that the region reflects light emitted from the phosphor.

6. The phosphor wheel device according to claim 1 , wherein the substrate is formed of a heat conductive material.

7. The phosphor wheel device according to claim 6 , wherein the substrate is formed of an aluminum alloy.

8. The phosphor wheel device according to claim 6 , wherein the substrate is formed of sapphire glass.

9. A phosphor wheel device accommodating housing comprising a heat exchange element and hermetically accommodating a phosphor wheel device therein, wherein
the phosphor wheel device comprises:
a phosphor wheel having: a disc-shaped substrate, and a phosphor disposed on one surface of the substrate in a circumferential direction;
a motor which rotatably drives the phosphor wheel; and
a fan member fixed to the other surface of the substrate so as to be integrally rotated with the phosphor wheel, having a plurality of blades extending in a radial direction of the phosphor wheel from an axis of rotation of the motor, and formed of a material different from a material that forms the substrate.

10. The phosphor wheel device accommodating housing according to claim 9 , wherein the blades are disposed on the other surface of the substrate such that the blades are positioned more inside than a position of the phosphor.

11. The phosphor wheel device accommodating housing according to claim 10 , wherein a distance from the blades to the phosphor is set equal to or larger than a height of the blades.

12. The phosphor wheel device accommodating housing according to claim 9 further comprising a first window which allows incidence of excitation light to enter therein and irradiation of light emitted from the phosphor to outgo therefrom, wherein the phosphor wheel device is hermetically accommodated by fitting a first lens unit into the first window.

13. The phosphor wheel device accommodating housing according to claim 9 further comprising:
a first window which allows irradiation of light emitted from the phosphor to outgo therefrom; and
a second window which allows incidence of excitation light to enter therein, wherein
the phosphor wheel device is hermetically accommodated by fitting a first lens unit into the first window and by fitting a second lens unit into the second window.

14. A projection-type image display device comprising:
a phosphor wheel device including:
a phosphor wheel having a disc-shaped substrate and a phosphor disposed on one surface of a substrate in a circumferential direction;
a motor which rotatably drives the phosphor wheel; and
a fan member fixed to the other surface of the substrate so as to be integrally rotated with the phosphor wheel, having a plurality of blades extending in a radial direction of the phosphor wheel from an axis of rotation of the motor, and formed of a material different from a material that forms the substrate;

a phosphor wheel device accommodating housing having a heat exchange element and hermetically accommodating the phosphor wheel device therein;
an excitation light source generating excitation light which excites the phosphor; and
an optical modulation element generating image light by modulating incident light based on an image signal.

15. The projection-type image display device according to claim 14 , wherein the blades are disposed on the other surface of the substrate such that the blades are positioned more inside than a position of the phosphor.

16. The projection-type image display device according to claim 15 , wherein a distance from the blades to the phosphor is set equal to or larger than a height of the blades.

17. The projection-type image display device according to claim 14 , wherein the fan member is formed by bending a stainless steel plate.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yamagishi Shigekazu
• Chikayama Manabu

Classifications

• G02B26/008 Primary

  in the form of devices for effecting sequential colour changes, e.g. colour wheels · CPC title

• G03B21/16

  Cooling; Preventing overheating · CPC title

• G03B21/204

  using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197) · CPC title

• G02B7/008

  with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation · CPC title