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Light source device, projector, and display device

A technology of a light source device and a light source unit, which is applied in projection devices, optics, instruments, etc., and can solve problems such as damage to liquid crystal panels and decreased reliability of liquid crystal panels

Active Publication Date: 2022-04-22
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the sub-pixels of the liquid crystal panel are damaged, and the reliability of the liquid crystal panel may decrease.

Method used

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  • Light source device, projector, and display device
  • Light source device, projector, and display device
  • Light source device, projector, and display device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0033] Below, use Figure 1 to Figure 7 A first embodiment of the present invention will be described.

[0034] figure 1 It is a schematic configuration diagram of the projector 1 of the present embodiment.

[0035] In addition, in each of the following drawings, in order to facilitate the observation of each component, the scale of the dimension may be different depending on the component.

[0036] The projector 1 of the present embodiment modulates light emitted from the light source device 2 to form an image corresponding to image information, and enlarges and projects the formed image onto a projection surface such as a screen. In other words, the projector 1 forms an image by modulating the light emitted from the light source device 2 by one light modulation device 6 including one liquid crystal panel 61 , and projects the formed image. The projector 1 is a so-called single-panel type projector.

[0037] Such as figure 1 As shown, the projector 1 has a light source d...

no. 2 Embodiment approach

[0183] Below, use Figure 10 A second embodiment of the present invention will be described.

[0184] The basic configuration of the light source device and the projector of the second embodiment is the same as that of the first embodiment, and the configuration of the wavelength conversion element is different from that of the first embodiment. Therefore, in this embodiment, the overall description of the light source device and the projector is omitted.

[0185] Figure 10 It is a front view of the light conversion device 72 viewed from the +Z direction in the light source device 14 of the second embodiment.

[0186] exist Figure 10 In the drawings, the same reference numerals are assigned to the same components as those in the drawings used in the first embodiment, and description thereof will be omitted. In addition, in Figure 10 In the figure, when observing the light conversion device 72 viewed from the -Z direction, the diffusion element 32, the first wavelength ...

no. 3 Embodiment approach

[0198] Below, use Figure 11 ~ Figure 16 A third embodiment of the present invention will be described.

[0199] The basic structure of the projector of the third embodiment is the same as that of the first embodiment, and the structure of the light source device is different from that of the first embodiment. Therefore, in this embodiment, an overall description of the projector is omitted.

[0200] Figure 11 It is a perspective view of the light source device 15 of this embodiment. Figure 12 It is a plan view of the light source device 15 seen from the +Y direction, and shows the behavior of light in the first period. Figure 13 It is a plan view of the light source device 15 seen from the +Y direction, and shows the behavior of light in the second period. Figure 14 It is a front view of the light converting device 65 viewed from the −Z direction. Figure 15 It is a side view of the light source device 15 seen from the -X direction, and shows the behavior of light in...

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PUM

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Abstract

A light source device, a projector, and a display device are capable of emitting a plurality of colored lights from spatially different positions. The light source device includes: a light source unit; a first polarization separation element that transmits the first light in the first polarization direction from the light source unit and reflects the first light in the second polarization direction; a first phase difference element; a second polarization separation element that reflects the first light in the second polarization direction from the first phase difference element; a second phase difference element; and a light conversion device having a diffusion element that diffuses the first light from the second phase difference element, a first wavelength conversion element that converts the wavelength of the first light and emits second light, and a substrate, the diffusion element and the first wavelength conversion element being arranged side by side on the same circumference of the substrate, and the second phase difference element being arranged between the first and second polarization separation elements and the substrate. The first and second polarization separation elements respectively transmit the first light from the diffusion element and the second light from the first wavelength conversion element.

Description

technical field [0001] The present invention relates to a light source device, a projector and a display device. Background technique [0002] There is known a projector that modulates light emitted from a light source to generate image light based on image information, and projects the generated image light. Patent Document 1 below discloses a projection type color image display device including a light source, a plurality of dichroic mirrors, a liquid crystal display element having a microlens array, and a projection lens. The projection-type color image display device separates the white light emitted from the light source into a plurality of color lights of different colors, and makes the separated color lights enter different sub-pixels in a liquid crystal display element, thereby performing color display . [0003] In the projection type color image display device described above, the red reflective dichroic mirror, the green reflective dichroic mirror, and the blue ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G03B21/00
CPCG03B21/2073G03B21/204G03B21/208G03B21/006H04N9/3158H04N9/3167H04N9/3108G02B27/283G02B5/0284H04N9/31
Inventor 安松航中村典生得能友太秋山光一
Owner SEIKO EPSON CORP