JP2012037681A5

JP2012037681A5 -

Info

Publication number: JP2012037681A5
Application number: JP2010176839A
Authority: JP
Filing date: 2010-08-06
Publication date: 2013-09-05
Anticipated expiration: 2030-08-06

Description

本発明は、このような従来技術の問題点に鑑みてなされたものであり、画面の輝度を向上させることのできる光源ユニットと、この光源ユニットを備えたプロジェクタと、を提供することを目的としている。
The present invention has been made in view of the problems of the prior art, and has an object to provide a light source unit capable of improving the luminance of a screen and a projector including the light source unit. Yes.

本発明の光源ユニットは、蛍光体の層が形成された蛍光発光部と、光を透過する透過部と、を有する蛍光板と、前記蛍光体を励起可能な波長帯域の光を射出する第一光源と、前記蛍光体から射出される蛍光光及び前記第一光源から射出される光とは異なる波長帯域の光を射出する第二光源と、前記蛍光板から射出される各色波長帯域光を所定の一面に導光する導光光学系と、前記第一光源及び第二光源の発光を個別に制御する光源制御手段と、を備え、前記蛍光板の蛍光発光部には、光を反射する反射面が形成され、該反射面上に蛍光体の層が形成されており、前記蛍光板は、前記第一光源及び第二光源の光路上に配置され、前記第一光源の光軸と前記第二光源の光軸とが交差する位置に、前記第一光源から射出される光を透過させ前記第二光源から射出される光を反射する、又は、前記第一光源から射出される光を反射し前記第二光源から射出される光を透過させるダイクロイック面が配置され、前記第一光源及び第二光源から射出される光が前記蛍光板の蛍光発光部と透過部とに照射可能とされていることを特徴とする。
The light source unit of the present invention emits a fluorescent light emitting unit layer of the phosphor is formed, and transparently portion that spend translucent light, a fluorescent plate having, the phosphor light excitable wavelength band One light source, a second light source that emits light in a wavelength band different from the light emitted from the phosphor and the light emitted from the first light source, and each color wavelength band light emitted from the phosphor plate are predetermined. A light guide optical system that guides light to one surface, and a light source control unit that individually controls light emission of the first light source and the second light source, and a fluorescent light emitting portion of the fluorescent plate has a reflective surface that reflects light And a phosphor layer is formed on the reflecting surface, and the fluorescent plate is disposed on the optical path of the first light source and the second light source, and the optical axis of the first light source and the second light source The light emitted from the first light source is transmitted at a position where the optical axis intersects the second optical axis. A dichroic surface that reflects light emitted from the light source or reflects light emitted from the first light source and transmits light emitted from the second light source is disposed, and the first light source and the second light source are arranged. light emitted is characterized in that it is capable irradiated to the fluorescent light emitting portion and transparently part of the fluorescent screen from.

本発明によれば、画面の輝度を向上させることのできる光源ユニットと、この光源ユニットを備えたプロジェクタと、を提供することができる。
ADVANTAGE OF THE INVENTION According to this invention, the light source unit which can improve the brightness | luminance of a screen, and a projector provided with this light source unit can be provided.

Claims

A fluorescent screen having a fluorescent emission portion a layer of phosphor is formed, and transparently portion that spend translucent light, and
A first light source that emits light in a wavelength band capable of exciting the phosphor;
A second light source that emits light of a wavelength band different from the fluorescent light emitted from the phosphor and the light emitted from the first light source;
A light guide optical system for guiding each color wavelength band light emitted from the fluorescent plate to a predetermined surface;
Light source control means for individually controlling the light emission of the first light source and the second light source,
In the fluorescent light emitting portion of the fluorescent plate, a reflective surface for reflecting light is formed, and a phosphor layer is formed on the reflective surface,
The fluorescent plate is disposed on an optical path of the first light source and the second light source,
Transmits light emitted from the first light source and reflects light emitted from the second light source at a position where the optical axis of the first light source and the optical axis of the second light source intersect, or A dichroic surface that reflects light emitted from the first light source and transmits light emitted from the second light source is disposed,
Light source unit and a light emitted from the first light source and second light source is capable irradiated to the fluorescent light emitting portion and transparently part of the fluorescent screen.

The light guide optical system includes a condenser a plurality of mirrors and light is disposed on the optical path of light emitted from the first light source and second light source spent permeable fluorescent light or the fluorescent screen being emitted from said fluorescent plate Composed of multiple lenses
A dichroic surface that transmits light emitted from the first light source and the second light source and reflects fluorescent light emitted from the phosphor of the fluorescent plate is disposed between the first light source, the second light source, and the fluorescent plate. The light source unit according to claim 1, wherein the light source unit is arranged.

The light guide optical system is disposed between the first light source and the second light source and the fluorescent plate, and without changing the direction of the optical axis of the light emitted from the light source, and the fluorescent light emitting unit A first optical axis conversion member having a dichroic surface for converting the direction of the optical axis of the fluorescent light emitted from
Or wherein the first light source and the dichroic mirror or a normal reflecting mirror which converts the direction of the optical axis of light emitted from the second light source is transmitted through the transparently section of the fluorescent plate, emitted from the first light source and second light source A second optical axis conversion member that is a dichroic mirror that converts the optical axis of the fluorescent light emitted from the fluorescent light emitting part of the fluorescent plate without changing the direction of the optical axis of the light
By further converting the optical axis of the fluorescent light converted by the first optical axis conversion member and the optical axis of the light emitted from the first light source and the second light source converted by the second optical axis conversion member, The third optical axis converting member and the fourth optical axis converting member for guiding each color wavelength band light emitted from the fluorescent plate to the same optical path directed in the same direction, Light source unit.

The first optical axis conversion member is disposed between the fluorescent plate and the light source on an optical path of light emitted from the first light source and the second light source,
The second optical axis conversion member is disposed at a position opposite to the light source with respect to the fluorescent plate on an optical path of light emitted from the first light source and the second light source,
The third optical axis conversion member is disposed on the optical axis of the light emitted from the first light source and the second light source converted by the second optical axis conversion member,
The fourth optical axis conversion member includes an optical axis of fluorescent light emitted from the fluorescent light emitting unit converted by the first optical axis conversion member, the first light source converted by a third optical axis conversion member, and The light source unit according to claim 3, wherein the light source unit is disposed at a position where the optical axis of light emitted from the second light source intersects.

The light source unit according to claim 3, wherein the first optical axis conversion member is a dichroic prism.

The light source unit according to claim 3, wherein the first optical axis conversion member is a dichroic mirror.

The second to fourth optical axis conversion members include two reflection mirrors that convert the optical axes of light or fluorescent light emitted from the first light source and the second light source, and the first light source and the second light source. The optical axis of the emitted light, and one dichroic mirror that converts the other without converting any one of the optical axes of the fluorescent light emitted from the fluorescent light emitting unit. The light source unit according to claim 3, wherein the light source unit is a light source unit.

The secondary optical axis changing member is a said first light source and a reflecting mirror for converting the optical axis by 90 degrees of the light emitted from the second light source is transmitted through the transparently part of the fluorescent screen,
The third optical axis conversion member is a reflection mirror that converts the optical axis of the light emitted from the first light source and the second light source converted by the second optical axis conversion member by 90 degrees,
The fourth optical axis conversion member does not change the direction of the optical axis of the light emitted from the first light source and the second light source converted by the third optical axis conversion member, and the first light 8. The light source unit according to claim 7, wherein the light source unit is a dichroic mirror that converts the direction of the optical axis of fluorescent light converted by the axis conversion member by 90 degrees.

The light source according to any one of claims 3 to 6, wherein the second to fourth optical axis conversion members are three reflection mirrors that convert the optical axis of light by 90 degrees. unit.

The fluorescent plate is a luminescent wheel consisting of a disc-shaped base member which is rotated by a wheel motor, according to claim, characterized in that said luminous light emitting device and transparently parts are juxtaposed in the circumferential direction The light source unit according to any one of claims 1 to 9.

The first light source is a laser emitter that emits light in a blue wavelength band,
The second light source is a laser emitter that emits light in a red wavelength band,
11. The light source unit according to claim 1, wherein the phosphor is a phosphor that receives excitation light from the first light source and emits fluorescent light in a green wavelength band. .

The light source unit according to claim 1, wherein the transmission unit is a diffusion transmission unit that diffuses and transmits light.

The light source unit according to any one of claims 1 to 12 , a display element, a light source side optical system that condenses light from the light source unit on the display element, and the light emitted from the display element. A projector comprising: a projection-side optical system that projects an image on a screen; and a projector control unit that controls the light source unit and the display element.