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Light source device and projection apparatus

A light source device and technology of light source, which can be applied to projection devices, optics, instruments, etc., can solve the problems of high cost and difficulty in miniaturizing projection devices.

Pending Publication Date: 2020-10-20
STANLEY ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a light source that emits light of each primary color of R, G, and B is used for color display, it will be difficult to miniaturize the entire projection device, and the cost will also increase

Method used

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  • Light source device and projection apparatus
  • Light source device and projection apparatus
  • Light source device and projection apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0101] Next, several embodiments of the light source device 1 will be described. First, refer to figure 2 and image 3 The light source device of the first embodiment will be described.

[0102] (light source device)

[0103] First, the light source device 4 will be described. figure 2 is an exploded perspective view showing the light source device, image 3 is expressed in figure 2A diagram of an example of a fluorescent wheel used in the light source device. The light source device 1 includes a fluorescent wheel 2 rotatable around a rotation axis Ax, a motor 4 positioned on the rotation axis Ax to rotate the fluorescent wheel 2 , and a semiconductor light source 3 . The semiconductor light source 3 emits light that reaches the incident surface 2 a of the fluorescent wheel 2 . The motor 4 and the semiconductor light source 3 are controlled by the output signal from the light source device control unit 7 , specifically, the rotational drive of the motor 4 and the lig...

no. 2 Embodiment approach

[0126] In the above-mentioned first embodiment, as the second phosphor layer formed on the phosphor wheel 2, the second phosphor layer 35 mixed with the second phosphor is formed on the first phosphor layer 34. The embodiment is different in that a diffusion layer not containing phosphor is used. Other points are the same as those of the above-mentioned embodiment, so descriptions are omitted here. Using the one used in the description of the first embodiment image 3 , and the second embodiment will be described. Wherein, the reference numeral 35 is replaced by a diffusion layer.

[0127] like image 3 As shown, the second segment region 22 includes a second segment forming layer 32 composed of a first phosphor layer 34 and a diffusion layer 35 covering the first phosphor layer 34 . The first phosphor layer 34 is an annular layer with a uniform thickness. The diffusion layer 35 is formed to cover the first phosphor layer 34 so as to straddle the first phosphor layer 34 ....

no. 3 Embodiment approach

[0131] use Figure 4 A third embodiment will be described. Figure 4 is a cross-sectional view along the radius of the first region of the fluorescent wheel 60 . In the first embodiment, the fluorescent wheel 2 uses a metal material as the supporting substrate 10, and the flat surface 12 as a polished surface is formed in the outer peripheral region 10b in order to improve the reflectance. This embodiment differs from the first embodiment in that a reflective coating is provided on the entire surface of the support substrate 10 on the incident surface 2 a side, and the segment formation layer 30 is provided via the reflective coating. In addition, in Figure 4 In FIG. 2 , the dimensions in the thickness direction are shown exaggerated in some thicknesses for convenience of description.

[0132] Figure 4 The fluorescent wheel 60 of (A) uses a white reflective layer obtained by dispersing white inorganic ceramic fine particles in a high concentration in a silicone resin as ...

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Abstract

The invention provides a light source device and a projection apparatus. Provided is the light source device which has a simple structure and does not generate a gap between phosphors. In addition, aprojection-type display device capable of obtaining higher illuminance can be provided. A fluorescent wheel provided with an incident surface on which light emitted from a semiconductor light source is incident is provided, a first segment region and a second segment region which are adjacent to each other are provided in the circumferential direction on a reflective substrate, and a segment-forming layer corresponding to each segment region is applied. The lower layer of the second segment region is a phosphor layer of the first segment region, and the upper layer of the second segment regionis a phosphor layer or a diffusion layer of a predetermined size. As a result, the reflective substrate is prevented from being exposed by generating a gap between the segment regions.

Description

technical field [0001] The invention relates to a light source device and a projection device. Background technique [0002] In recent years, small projection display devices that perform color display have been developed. If light sources emitting light of each primary color of R, G, and B are used for color display, it is difficult to reduce the size of the entire projection device, and the cost also increases. Therefore, it has been proposed to use a light source device that irradiates excitation light to a fluorescent wheel on which a phosphor layer is formed on a rotating plate, and emits light including R, G, and B from the fluorescent wheel (for example, Patent Document 1). [0003] Patent Document 1 describes a light source device using a fluorescent wheel on which a red phosphor layer, a green phosphor layer, and a blue phosphor layer are formed as a fluorescent wheel provided with a plurality of phosphor layers. Phosphor layers that emit various colors are arrang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20
CPCG03B21/204
Inventor 森京介山本英明
Owner STANLEY ELECTRIC CO LTD
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