Multilayer wavelength conversion device and projector

Patent metadata

Field	Value
Publication number	US-10281808-B2
Application number	US-201615156338-A
Country	US
Kind code	B2
Filing date	May 17, 2016
Priority date	Aug 31, 2015
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

A wavelength conversion device adapted to convert a wavelength of an exciting light beam is provided. The wavelength conversion device includes a main body, a middle connection layer and a wavelength conversion adhesive layer. The main body has a reflective surface, wherein the reflective surface has a first region and a second region, and the second region is located at a transmission path of the exciting light beam. The middle connection layer is disposed on the first region and exposes the second region. The wavelength conversion adhesive layer is adhered on the middle connection layer and covers the second region, wherein the exciting light beam is adapted to pass the wavelength conversion layer to be reflected by the second region. In addition, a projector having a wavelength conversion device is also provided.

First claim

What is claimed is:

1. A wavelength conversion device adapted to convert a wavelength of an exciting light beam, the wavelength conversion device comprising:
a main body having a reflective surface, wherein the reflective surface has a first region and a second region, the second region is located at a transmission path of the exciting light beam and the first region is not located at the transmission path of the exciting light beam;
a middle connection layer disposed on the first region and exposing the second region; and
a wavelength conversion adhesive layer adhered on the middle connection layer, wherein the wavelength conversion adhesive layer covers and adheres without a spatial air gap to the second region, wherein the exciting light beam is adapted to pass through the wavelength conversion adhesive layer to be reflected by the second region, wherein the middle connection layer is disposed between the first region and the wavelength conversion adhesive layer.

2. The wavelength conversion device according to claim 1 , wherein the middle connection layer is a modifier.

3. The wavelength conversion device according to claim 1 , wherein the middle connection layer is an adhesive layer.

4. The wavelength conversion device according to claim 2 , wherein a material of the modifier comprises organic silicon.

5. The wavelength conversion device according to claim 2 , wherein a chemical reaction is generated between the modifier and the first region of the reflective surface such that the modifier is combined with the first region of the reflective surface.

6. The wavelength conversion device according to claim 1 , wherein the first region at least partially surrounds the second region.

7. The wavelength conversion device according to claim 1 , wherein at least a portion of an edge of the wavelength conversion adhesive layer is adhered on the middle connection layer.

8. The wavelength conversion device according to claim 1 , wherein the wavelength conversion adhesive layer has a first wavelength conversion region and a second wavelength conversion region, and the main body is adapted to rotate so as to drive the first wavelength conversion region and the second wavelength conversion region to move in sequence to the transmission path of the exciting light beam, the first wavelength conversion region covers a portion of the second region, the second wavelength conversion region covers another portion of the second region, the wavelength conversion adhesive layer is adapted to convert the exciting light beam into a first conversion light beam having a first wavelength by the first wavelength conversion region, and adapted to covert the exciting light beam into a second conversion light beam having a second wavelength by the second wavelength conversion region, and the first wavelength is different from the second wavelength.

9. The wavelength conversion device according to claim 1 , wherein the wavelength conversion adhesive layer is adhered on the second region.

10. The wavelength conversion device according to claim 1 , wherein the main body has a light transmission region, and the light transmission region is adjacent to the reflective surface.

11. A wavelength conversion device adapted to convert a wavelength of an exciting light beam, the wavelength conversion device comprising:
a main body having a reflective surface, wherein the reflective surface is located at a transmission path of the exciting light beam;
a middle adhesive layer adhered on the reflective surface, wherein a material of the middle adhesive layer comprises a first adhesive and a first phosphor powder; and
a wavelength conversion adhesive layer adhered on the middle adhesive layer, wherein the exciting light beam is adapted to pass through the wavelength conversion adhesive layer to be reflected by the reflective surface,
wherein a material of the wavelength conversion adhesive layer comprises a second adhesive and a second phosphor powder, and a concentration of the first phosphor powder in the middle adhesive layer is lower than a concentration of the second phosphor powder in the wavelength conversion adhesive layer, so that the middle adhesive layer comprising the first adhesive has better adhesive force than the wavelength conversion adhesive layer comprising the second adhesive,
wherein a material type of the first phosphor powder of the middle adhesive layer is the same as a material type of the second phosphor powder of the wavelength conversion adhesive layer, and the first phosphor powder of the middle adhesive layer and the second phosphor powder of the wavelength conversion adhesive layer are excited to generate the same conversion light beam.

12. The wavelength conversion device according to claim 11 , wherein the exciting light beam is adapted to pass through the wavelength conversion adhesive layer and the middle adhesive layer to be reflected by the reflective surface.

13. The wavelength conversion device according to claim 11 , wherein the reflective surface has a first region and a second region, the second region is located at the transmission path of the exciting light beam, the middle adhesive layer is adhered on the first region and exposes the second region, the wavelength conversion adhesive layer is adhered on the middle adhesive layer and covers the second region, the exciting light beam is adapted to pass through the wavelength conversion adhesive layer to be reflected by the second region.

14. The wavelength conversion device according to claim 13 , wherein the wavelength conversion adhesive layer is adhered on the second region.

15. The wavelength conversion device according to claim 13 , wherein the first region at least partially surrounds the second region.

16. The wavelength conversion device according to claim 11 , wherein at least a portion of an edge of the wavelength conversion adhesive layer is adhered on the middle adhesive layer.

17. The wavelength conversion device according to claim 11 , wherein the wavelength conversion adhesive layer has a first wavelength conversion region and a second wavelength conversion region, and the main body is adapted to rotate so as to drive the first wavelength conversion region and the second wavelength conversion region to move in sequence to the transmission path of the exciting light beam, the first wavelength conversion region covers a portion of the reflective surface, the second wavelength conversion region covers another portion of the reflective surface, the wavelength conversion adhesive layer is adapted to convert the exciting light beam into a first conversion light beam having a first wavelength by the first wavelength conversion region, and adapted to convert the exciting light beam into a second conversion light beam having a second wavelength by the second wavelength conversion region, and the first wavelength is different from the second wavelength.

18. The wavelength conversion device according to claim 11 , wherein the main body has a light transmission region, and the light transmission region is adjacent to the reflective surface.

19. A projector, comprising:
an exciting light source device adapted to provide an exciting light beam;
a wavelength conversion device adapted to convert a wavelength of the exciting light beam, the wavelength conversion device comprising:
a main body having a reflective surface, wherein the reflective surface has a first region and a second region, the second region is located at a transmission path of the exciting light beam and the first region is not loc

Assignees

• Coretronic Corp

Inventors

• Hsu Pi-Tsung
• Tsai Chia-Lun

Classifications

• G03B33/08

  Sequential recording or projection (G03B33/02, G03B33/04, G03B33/06 take precedence) · CPC title

• G03B21/204 Primary

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

• H04N9/3114

  by using a sequential colour filter producing one colour at a time · CPC title

• G03B21/2066

  Reflectors in illumination beam (in projection beam G03B21/28) · CPC title

• G02B26/008

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