JP2013164555A5

JP2013164555A5 -

Info

Publication number: JP2013164555A5
Application number: JP2012028703A
Authority: JP
Filing date: 2012-02-13
Publication date: 2015-02-26
Anticipated expiration: 2032-02-13

Description

上記の課題を解決するため、本発明のプロジェクターは、照明光を変調する光変調装置と、励起光を射出する励起光源と、前記励起光が照射されることで蛍光を放射する蛍光発光領域を有する蛍光発光素子と、を備え、前記光変調装置を照明する光源装置と、前記光源装置から射出された光の一部の強度を検出する検出装置と、前記光変調装置が遮光状態に保持された状態で前記励起光源から前記励起光が射出されることを開始させ、前記検出装置による検出結果に基づいて、前記光変調装置の遮光状態を解除するか否かを判断する制御装置と、を含むことを特徴とする。
In order to solve the above problems, a projector according to the present invention includes a light modulation device that modulates illumination light, an excitation light source that emits excitation light, and a fluorescence emission region that emits fluorescence when irradiated with the excitation light. A light source device that illuminates the light modulation device, a detection device that detects the intensity of a part of light emitted from the light source device, and the light modulation device is held in a light-shielded state. A control device that starts emitting the excitation light from the excitation light source in a state where the light modulation device is released and determines whether or not to cancel the light shielding state of the light modulation device based on a detection result by the detection device; It is characterized by including.

Claims

A light modulation device for modulating illumination light;
A light source device that illuminates the light modulation device, comprising: an excitation light source that emits excitation light; and a fluorescence light-emitting element that has a fluorescence emission region that emits fluorescence when irradiated with the excitation light;
A detection device for detecting the intensity of a part of the light emitted from the light source device;
Whether the excitation light is emitted from the excitation light source while the light modulation device is held in a light-shielded state, and the light-shielding state of the light modulation device is released based on a detection result by the detection device. A control device for determining whether or not;
Including a projector.

The detection device includes:
A fluorescence intensity detection device for detecting the intensity of a part of the fluorescence;
An excitation light intensity detection device for detecting the intensity of a part of the excitation light;
The projector according to claim 1, comprising at least one of the projectors.

The detection device comprises the fluorescence intensity detection device,
The projector according to claim 2, wherein the control device releases the light blocking state of the light modulation device when the light intensity detected by the fluorescence intensity detection device is equal to or higher than a predetermined intensity.

The detection device includes the excitation light intensity detection device,
3. The projector according to claim 2, wherein the control device releases the light blocking state of the light modulation device when the light intensity detected by the excitation light intensity detection device is less than a predetermined intensity.

The detection device comprises the fluorescence intensity detection device and the excitation light intensity detection device,
The control device estimates the conversion efficiency of the excitation light into the fluorescence by the fluorescence emission region based on the detection result of the fluorescence intensity detection device and the detection result of the excitation light intensity detection device, and the estimated conversion efficiency The projector according to claim 2, wherein the light shielding state of the light modulation device is canceled when is equal to or greater than a predetermined value.

The fluorescent light emitting element is a rotating plate that rotates around a predetermined rotation axis,
The projector according to claim 1, wherein the fluorescent light emitting region is provided along a rotation direction of the rotating plate.

At least during the period when the irradiation spot of the excitation light is located in the fluorescence emission region, the detection device detects the intensity of a part of the light emitted from the light source device,
The projector according to claim 6, wherein the detection device determines whether or not to cancel a light blocking state of the light modulation device based on a detection result of the period.

The control device rotates the fluorescent light emitting element in a state where the light modulation device is held in a light shielding state, and the excitation light source emits the excitation when the rotational speed of the fluorescent light emitting element is equal to or higher than a predetermined rotational speed. The projector according to claim 6, wherein light is started to be emitted.

The projector according to claim 1, wherein the excitation light source emits laser light as the excitation light.