JP-7856718-B2 - Light source device and projection image display device

Inventors

• 奥野 学

Assignees

• パナソニックプロジェクター＆ディスプレイ株式会社

Dates

Publication Date

20260511

Application Date

20240920

Claims (11)

1. A first enclosure that defines a first space that is substantially sealed and comprises a first transmissive window and a second transmissive window, which are members that allow light to pass through, A light source is positioned outside the first space of the first housing and emits light so as to pass through the first transparent window and enter the first space of the first housing, A second space is defined in a substantially sealed state in which the light source is arranged, and the second housing is attached to the first housing, The first housing comprises an output light generation optical system housed in the first space of the first housing, which generates a predetermined output light from light transmitted through the first transmission window and transmits the output light through the second transmission window to the outside of the first housing, The output light generation optical system includes a phosphor wheel device including a reflective substrate, Light source device.
2. The light source device according to claim 1, wherein the phosphor wheel device includes a phosphor that converts blue light into yellow light.
3. The light source device according to claim 2, wherein the output light generation optical system spectrally separates the blue light from the light source into a first blue light and a second blue light, guides the first blue light toward the reflective substrate, and generates white light as the output light by combining the yellow light reflected from the reflective substrate with the second blue light.
4. The light source device according to claim 1 , wherein the second housing is detachably attached to the first housing.
5. The light source device according to claim 3 , wherein the output light generation optical system has a mirror into which the second blue light is incident.
6. The device has a focusing lens positioned at the location where the first blue light is incident, The light source device according to claim 3 , wherein the first blue light focused by the focusing lens is incident on the phosphor wheel device.
7. The light source device according to claim 1, further comprising a first cooling device on the outer surface of the first housing for cooling the phosphor wheel device.
8. The light source device according to claim 1 , further comprising a second cooling device for cooling the light source on the outer surface of the second housing.
9. A light source device according to any one of claims 1 to 8 , An image forming module that converts the output light of the light source device into image light, A projection-type image display device comprising: a projection optical system for projecting image light from the image forming module.
10. The image forming module and a third housing having a third transparent window are provided. The projection image display device according to claim 9 , wherein light emitted from the second transmissive window is incident on the third transmissive window, which is a light-transmitting member.
11. The projection image display device according to claim 10 , wherein the third housing is located outside the second housing.

Description

This disclosure relates to a light source device and a projection-type image display device equipped with a light source device. Patent Document 1 discloses a projection-type image display device in which the light source can be easily replaced. Japanese Patent Publication No. 2015-179227 A schematic diagram showing a projection image display device equipped with a light source device according to Embodiment 1 of this disclosure.A schematic diagram showing a light source device in which the light source module and the output light generation module are separated from each other.A schematic diagram showing a light source device according to Embodiment 2 of this disclosure, in which the light source module and the output light generation module are separated from each other.A schematic diagram showing a light source device according to Embodiment 3 of this disclosure. A light source device according to one aspect of this disclosure comprises: a first housing defining a sealed space and having a first transmissive window and a second transmissive window; a light source disposed outside the sealed space of the first housing and emitting light so as to pass through the first transmissive window and enter the sealed space of the first housing; and an output light generation optical system housed within the sealed space of the first housing, which generates a predetermined output light from the light that has passed through the first transmissive window and emits the output light through the second transmissive window to the outside of the sealed space of the first housing. According to this embodiment, in a light source device for a projection-type image display device, the light source can be replaced while suppressing the adhesion of foreign matter to the optical elements of the optical system. For example, the light source device may further include a second housing containing the light source. In this case, the second housing is detachably attached to the first housing such that the light source faces the first translucent window. For example, the light source may be housed in a sealed space defined by the cooperation of the first and second housings when the second housing is attached to the first housing. For example, the second housing may define a sealed space for housing the light source. For example, the light source may emit blue light as the light source, and the output light generation optical system may include a phosphor wheel device that includes a reflective substrate that converts and reflects the blue light into yellow light. In this case, the output light generation optical system spectrally separates the blue light from the light source into a first blue light and a second blue light, guides the first blue light toward the reflective substrate, and generates white light as the output light by combining the yellow light reflected from the reflective substrate with the second blue light. For example, the light source may emit blue light as the light source, and the light source device may further include a phosphor wheel device located outside the first housing, which includes a reflective substrate that converts and reflects the blue light into yellow light. In this case, the first housing further includes a third transmissive window facing the reflective substrate. Furthermore, the output light generation optical system spectrally separates the blue light from the light source into first blue light and second blue light, guides the first blue light to pass through the third transmissive window toward the reflective substrate, and generates white light as the output light by combining the yellow light reflected from the reflective substrate and passed through the third transmissive window with the second blue light. Furthermore, another embodiment of the projection-type image display device of this disclosure comprises the above-described light source device, an image forming module that converts the output light of the light source device into image light, and a projection optical system that projects the image light from the image forming module. According to this embodiment, in a light source device for a projection-type image display device, the light source can be replaced while suppressing the adhesion of foreign matter to the optical elements of the optical system. The embodiments will be described in detail below, with reference to the drawings as appropriate. However, unnecessarily detailed explanations may be omitted. For example, detailed explanations of already well-known matters or redundant explanations of substantially identical configurations may be omitted. This is to avoid unnecessarily verbose explanations and to facilitate understanding for those skilled in the art. The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this disclosure and are not intended to limit the subject matter described in the claim