JP2012027052A5

JP2012027052A5 -

Info

Publication number: JP2012027052A5
Application number: JP2010162499A
Authority: JP
Filing date: 2010-07-20
Publication date: 2013-06-27
Anticipated expiration: 2030-07-20

Description

本開示の光源装置は、投写型表示装置に用いられる光源であって、レーザーと、レーザーからの光を受けて蛍光を発する蛍光体層を有する蛍光基板と、蛍光が蛍光基板から出射する側に設けられ、入射した光の入射角に応じて屈折光と反射光とに分離するプリズム面を有するプリズムアレイと、を備える。このプリズムアレイは、プリズム面と蛍光基板との間の多重反射により、蛍光の指向性を高めることを要旨とする。上記構成の光源装置は、固体光源により蛍光を発した光が、高い指向性をもつため、出射光束の立体角を小さくでき、高効率な光源が構成できる。 A light source device of the present disclosure is a light source used in a projection display device, and includes a laser, a fluorescent substrate having a phosphor layer that emits fluorescence upon receiving light from the laser, and a side on which fluorescence is emitted from the fluorescent substrate. And a prism array having a prism surface that separates into refracted light and reflected light according to an incident angle of incident light. The gist of this prism array is to enhance fluorescence directivity by multiple reflection between the prism surface and the fluorescent substrate. In the light source device having the above configuration, since the light emitted by the solid light source has high directivity, the solid angle of the emitted light beam can be reduced, and a highly efficient light source can be configured.

上記の光源装置において、プリズムアレイは、複数の四角錐プリズムを有しており、蛍光基板と対向する入射面側が四角錐の底面となるよう、複数の四角錐プリズムが配置されるとよい。すなわち、プリズムアレイは、平面側を入射面、プリズム面側を出射面とする。In the above light source device, the prism array includes a plurality of quadrangular pyramid prisms, and the plurality of quadrangular pyramid prisms may be arranged so that the incident surface side facing the fluorescent substrate is a bottom surface of the quadrangular pyramid. That is, in the prism array, the plane side is the entrance surface and the prism surface side is the exit surface.

本開示の投写型表示装置は、光源部と、映像信号に応じて画像を形成する画像形成部と、光源装置からの光を集光して画像形成部を照明する照明部と、画像形成部で形成された画像を拡大投写する投写部と、を備え、この光源部に上記の光源装置を用いることを要旨とする。上記の光源装置を用いるため、長寿命で、光利用効率が高く、明るい投写型表示装置が構成できる。 A projection display device of the present disclosure includes a light source unit, an image forming unit that forms an image according to a video signal, an illumination unit that collects light from the light source device and illuminates the image forming unit, and an image forming unit And a projection unit for enlarging and projecting the image formed in (1) above, and using the above light source device for the light source unit. Since the light source device described above is used, a bright projection display device having a long life, high light use efficiency, and high brightness can be configured.

Claims

With laser,
A fluorescent substrate having a phosphor layer that emits fluorescence in response to light from the laser;
A light source device comprising: a prism array having a prism surface that is provided on a side where the fluorescence is emitted from the fluorescent substrate and separates into refracted light and reflected light according to an incident angle of incident light;
The light source device characterized in that the prism array enhances the directivity of the fluorescence by multiple reflection between the prism surface and the fluorescent substrate .

The light source device according to claim 1,
The prism array is
Having a plurality of square pyramid prisms,
The light source device , wherein the plurality of quadrangular pyramid prisms are arranged such that an incident surface side facing the fluorescent substrate is a bottom surface of the quadrangular pyramid .

A light source unit, an image forming unit that forms an image in response to a video signal, an illumination unit that collects light from the light source device to illuminate the image forming unit, and an image formed by the image forming unit. A projection display device comprising: a projection unit that performs enlargement projection;
3. A projection display device using the light source device according to claim 1 or 2 for the light source unit.