Projection apparatus and illumination system

Patent metadata

Field	Value
Publication number	US-2016004148-A1
Application number	US-201514753034-A
Country	US
Kind code	A1
Filing date	Jun 29, 2015
Priority date	Jul 1, 2014
Publication date	Jan 7, 2016
Grant date	—

Abstract

A projection apparatus including an illumination system, a light valve, and an image-forming system is provided. The illumination system includes a first dichroic unit, a second dichroic unit, a third dichroic unit, two wavelength conversion modules, two light sources respectively emitting a first beam and a second beam, and an excitation light source module emitting an excitation beam. The first dichroic unit and the second dichroic unit are disposed on a transmission path of the excitation beam. The two wavelength conversion modules respectively convert the corresponding partial excitation beam coming from the first dichroic unit and the second dichroic unit into two converted beams. The light valve converts the first beam, the two converted beams, and the second beam coming from the third dichroic unit into an image beam. The image-forming system is disposed on a transmission path of the image beam.

First claim

What is claimed is:

1 . A projection apparatus, comprising:
an illumination system, comprising
a first light source, emitting a first beam;
an excitation light source module, emitting an excitation beam;
a first dichroic unit and a second dichroic unit, disposed on a transmission path of the excitation beam, wherein the first dichroic unit is further disposed on a transmission path of the first beam, and the second dichroic unit is further disposed on a transmission path of the first beam coming from the first dichroic unit;
a first wavelength conversion module, disposed on a transmission path of a first partial beam of the excitation beam coming from the first dichroic unit, and converting the first partial beam into a first converted beam transmitted back to the first dichroic unit, wherein the second dichroic unit is further disposed on a transmission path of the first converted beam coming from the first dichroic unit;
a second wavelength conversion module, disposed on a transmission path of a second partial beam of the excitation beam coming from the second dichroic unit, and converting the second partial beam into a second converted beam transmitted back to the second dichroic unit;
a second light source, emitting a second beam; and
a third dichroic unit, disposed on transmission paths of the second beam and the first beam, the first converted beam, and the second converted beam coming from the second dichroic unit;
a light valve, converting the first beam, the first converted beam, the second converted beam, and the second beam coming from the third dichroic unit into an image beam; and an image-forming system, disposed on a transmission path of the image beam.

2 . The projection apparatus as claimed in claim 1 , wherein the excitation light source module comprises:
a first excitation light source, emitting the first partial beam of the excitation beam, wherein the first dichroic unit is disposed on a transmission path of the first partial beam; and a second excitation light source, emitting the second partial beam of the excitation beam, wherein the second dichroic unit is disposed on a transmission path of the second partial beam.

3 . The projection apparatus as claimed in claim 1 , wherein the excitation light source module comprises:
an excitation light source, emitting the excitation beam; a beam splitting unit, disposed on the transmission path of the excitation beam, and splitting the excitation beam into the first partial beam and the second partial beam, wherein the second dichroic unit is disposed on a transmission path of the second partial beam coming from the beam splitting unit; and a reflecting unit, disposed on a transmission path of the first partial beam coming from the beam splitting unit, and reflecting the first partial beam coming from the beam splitting unit to the first dichroic unit.

4 . The projection apparatus as claimed in claim 3 , wherein a part of the excitation beam reflected by the beam splitting unit becomes the first partial beam, and a part of the excitation beam passing through the beam splitting unit becomes the second partial beam.

5 . The projection apparatus as claimed in claim 1 , wherein the second dichroic unit splits the excitation beam into the first partial beam and the second partial beam, and the first dichroic unit is further disposed on a transmission path of the first partial beam coming from the second dichroic unit.

6 . The projection apparatus as claimed in claim 1 , wherein the first beam sequentially passes through the first dichroic unit, the second dichroic unit, and the third dichroic unit, the first converted beam is first reflected by the first dichroic unit and sequentially passes through the second dichroic unit and the third dichroic unit, the second converted beam is reflected by the second dichroic unit and then passes through the third dichroic unit, and the second beam is reflected by the third dichroic unit.

7 . The projection apparatus as claimed in claim 6 , wherein the first partial beam passes through the first dichroic unit and is then transmitted to the first wavelength conversion module, and the second partial beam passes through the second dichroic unit and is then transmitted to the second wavelength conversion module.

8 . The projection apparatus as claimed in claim 6 , wherein a part of the excitation beam reflected by the second dichroic unit becomes the first partial beam, the first partial beam is reflected to the first wavelength conversion module by the first dichroic unit, and a part of the excitation beam passing through the second dichroic unit becomes the second partial beam transmitted to the second wavelength conversion module.

9 . The projection apparatus as claimed in claim 1 , wherein the first light source, the excitation light source module, and the second light source are laser light sources with different lighting wavelengths.

10 . The projection apparatus as claimed in claim 1 , wherein the first wavelength conversion module and the second wavelength conversion module are phosphor wheels with different colors of phosphors.

11 . An illumination system, comprising:
a first light source, emitting a first beam; an excitation light source module, emitting an excitation beam; a first dichroic unit and a second dichroic unit, disposed on a transmission path of the excitation beam, wherein the first dichroic unit is further disposed on a transmission path of the first beam, and the second dichroic unit is further disposed on a transmission path of the first beam coming from the first dichroic unit; a first wavelength conversion module, disposed on a transmission path of a first partial beam of the excitation beam coming from the first dichroic unit, and converting the first partial beam into a first converted beam transmitted back to the first dichroic unit, wherein the second dichroic unit is further disposed on a transmission path of the first converted beam coming from the first dichroic unit; a second wavelength conversion module, disposed on a transmission path of a second partial beam of the excitation beam coming from the second dichroic unit, and converting the second partial beam into a second converted beam transmitted back to the second dichroic unit; a second light source, emitting a second beam; and a third dichroic unit, disposed on transmission paths of the second beam and the first beam, the first converted beam, and the second converted beam coming from the second dichroic unit.

12 . The illumination system as claimed in claim 11 , wherein the excitation light source module comprises:
a first excitation light source, emitting the first partial beam of the excitation beam, wherein the first dichroic unit is disposed on a transmission path of the first partial beam; and a second excitation light source, emitting the second partial beam of the excitation beam, wherein the second dichroic unit is disposed on a transmission path of the second partial beam.

13 . The illumination system as claimed in claim 11 , wherein the excitation light source module comprises:
an excitation light source, emitting the excitation beam; a beam splitting unit, disposed on the transmission path of the excitation beam, and splitting the excitation beam into the first partial beam and the second partial beam, wherein the second dichroic unit is disposed on a transmission path of the second partial beam coming from the beam splitting unit; and a reflecting unit, disposed on a transmission path of the first partial beam coming from the beam splitting unit, and reflecting the first partial beam coming from the beam split

Assignees

• Coretronic Corp

Inventors

• Chiu Hao-Wei
• Chen Ko-Shun
• Wang Chi-Hsun
• Hsieh Chi-Tang

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

• G03B21/2013 Primary

  Plural light sources · CPC title

• G03B21/28

  Reflectors in projection beam {(in illumination beam G03B21/2066)} · CPC title

• F21V7/0016

  on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes · CPC title