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Projector

A projector, projection lens technology, used in television, optics, instruments, etc.

Inactive Publication Date: 2006-02-15
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, there is a possibility that high-intensity laser light may be emitted to the viewer due to failure of the sensor due to unexpected external factors or failure of the laser output control circuit.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] figure 1 It is a schematic diagram showing the configuration of the projector according to Embodiment 1 of the present invention. The projector 100 of this embodiment is mainly composed of a light source 101 that emits laser light, a lens optical system 103 including a collimating optical system 104 and a beam shaping optical system 105, a scanner 106 that scans the incident laser light in a two-dimensional direction, and A projection lens 108 for enlarging and projecting the scanned light and a mirror 109 for reflecting the projected light toward a screen 120 are configured. In this projector 100, a light source 101, a lens optical system 103, a scanner 106, a projection lens 108, and a mirror 109 are housed inside a housing 110 having a screen 120, and laser light propagating in the housing 110 is 120 to scan and display images.

[0036] Next, the structure and function of the projector of this embodiment will be described.

[0037]The light source 101 is composed ...

Embodiment 2

[0068] Image 6 It is a schematic diagram showing the configuration of a projector according to Embodiment 2 of the present invention.

[0069] Such as Image 6 As shown in (a), the projector 200 of this embodiment is mainly composed of a light source 101 that emits laser light, a lens optical system 103 including a collimating optical system and a beam shaping optical system, and a scanning system that scans the incident laser light in a two-dimensional direction. A device 106 , a condensing optical system 150 for condensing the scanned light, a mirror 160 for reflecting the condensed light, and an enlarging optical system 108 for enlarging and projecting the reflected light onto the screen 120 .

[0070] In this projector 200 , laser light emitted from a light source 101 is shaped into approximately parallel light with high directivity by a lens optical system 103 , and then scanned in two-dimensional directions by a scanner 106 . The light emitted from the scanner 106 is ...

Embodiment 3

[0075] Figure 7 It is a schematic diagram showing the configuration of a projector according to Embodiment 3 of the present invention.

[0076] Such as Figure 7 As shown, the projector 300 of this embodiment is mainly composed of a light source 101 that emits laser light, a lens optical system 103 including a collimating optical system and a beam shaping optical system, and a scanner 106 that scans the incident laser light in a two-dimensional direction. , a mirror 160 that reflects the scanned light, and an enlarging optical system 170 that enlarges and projects the reflected light onto the screen 120 .

[0077] In this projector 300 , laser light emitted from a light source 101 is shaped into approximately parallel light with high directivity by a lens optical system 103 , and then scanned in two-dimensional directions by a scanner 106 . The light emitted from the scanner 106 is reflected by the mirror 160 toward the curved mirror 170 serving as a magnifying optical syst...

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Abstract

To prevent an inadvertent output of high intensity laser beam toward an observer. A projector of rear-projection type comprises a light source 101 that outputs a laser beam and a scanner 106 that scans a screen 120 with the laser beam. In the projector, when a laser beam with energy exceeding an accessible emission limit due to failure of the light source 101 or the scanner 106 is outputted, at least one optical member (a lens optical system 103, a scanner 106, a reflection mirror 109, a screen 120 or the like)located in an optical path of the laser beam is arranged so as to be broken or altered in quality and to prevent the beam with energy exceeding the accessible emission limit from being output from the screen 120.

Description

technical field [0001] The present invention relates to a rear projection type projector that displays images by scanning laser light on a screen. Background technique [0002] Conventionally, rear projection projectors that display images by scanning laser light on a screen have been proposed. Since such a projector can display complete black by stopping the supply of laser light, it can display a high-contrast display compared with, for example, a projector using a liquid crystal light valve. In addition, since the directivity of laser light is high, the projection optical system can be simplified. Therefore, the projector can have a small and simple structure. Furthermore, colorization can be easily realized by combining multiple types of laser light such as red, green, and blue, and color display with high color purity can be realized because the laser light has high monochromaticity. [0003] However, in the case of displaying an image using laser light, it is necess...

Claims

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Application Information

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IPC IPC(8): H04N5/74G02B26/10
Inventor 野岛重男米窪政敏武田高司山崎哲朗
Owner SEIKO EPSON CORP
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