Optical device and projector

A technology of optical devices and dimming devices, which is applied in the fields of projectors and optical devices, can solve problems such as increased heat density, insufficient cooling of liquid crystal panels, and difficulty in fully utilizing the performance of liquid crystal panels, so as to improve cooling performance, enhance strength, Effect of improving cooling performance

Inactive Publication Date: 2003-03-12
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in recent years, with the progress of miniaturization and high brightness of projectors, the heat density in the device has increased compared with the past, and the structure of cooling the liquid crystal panel only by the air passage cannot sufficiently dissipate heat inside the projector. It is impossible to fully cool the liquid crystal panel, and it is difficult to give full play to the performance of the liquid crystal panel

Method used

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  • Optical device and projector
  • Optical device and projector
  • Optical device and projector

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0181] Next, a first embodiment of the present invention will be described with reference to the drawings.

[0182] (1. The main structure of the projector)

[0183] figure 1 is an overall perspective view of the projector 1 according to the first embodiment viewed from above, figure 2 is an overall perspective view of the projector 1 viewed from below, Figure 3 to Figure 5 It is a perspective view showing the inside of the projector 1 . Specifically, image 3 From figure 1 The figure when the upper box body 21 of the projector 1 is unloaded in the state of Figure 4 From image 3The figure seen when the shield plate 80, the drive plate 90, and the upper housing 472 are removed and viewed from the rear side, Figure 5 From Figure 4 The state shows the removal of the optical unit 4. The components 4, 21, 80, 90, 472 constituting the projector will be described in detail below.

[0184] exist Figure 1 to Figure 5 Among them, the projector 1 is equipped with an out...

no. 2 Embodiment approach

[0288] Next, a second embodiment of the present invention will be described.

[0289] In the following description, the same structure and the same member as those of the above-mentioned first embodiment are given the same reference numerals, and their detailed descriptions are omitted or simplified.

[0290] In the optical device of the first embodiment described above, the holding member 446 is provided with a rectangular plate-shaped body 446A and pins 447A protruding from four corners of the rectangular plate-shaped body 446A. On the other hand, the optical device of the second embodiment is different in that, as shown in FIG. 15 , the holding member 446 has a standing piece 447B having a substantially L-shaped front surface. Other configurations and manufacturing methods are the same as those of the first embodiment. In addition, the materials described in the first embodiment can be used for the materials of the respective components.

[0291] Specifically, the upright...

no. 3 Embodiment approach

[0295] Next, a third embodiment of the present invention will be described.

[0296] In the following description, the same structures and the same components as those of the first embodiment are given the same reference numerals, and detailed descriptions thereof are omitted or simplified.

[0297] In the optical device of the first embodiment described above, the holding member 446 is provided with a rectangular plate-shaped body 446A and pins 447A protruding from four corners of the rectangular plate-shaped body 446A. On the other hand, the optical device of the third embodiment is different in that, as shown in FIG. 16 , a holding member 446 is provided with a standing piece 447C having a substantially L-shaped front surface. Other configurations and manufacturing methods are the same as those of the first embodiment. In addition, the same materials as those described in the first embodiment can be used for the materials of various components.

[0298] Specifically, the ...

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Abstract

The invention provides a structure to attach a liquid crystal panel to a prism, which enables further enhancements in cooling capabilities. The structure includes a storing member fixed on a base and holding a holding frame, where a liquid crystal panel is held. Erected pieces to form a space to receive the holding frame are formed protruding on both left and right sides at the light incident side. Protrusions to form an air path with a cross-dichroic prism are formed on both left and right sides on the light emitting side. The liquid crystal panel is attached to the cross-dichroic prism through a holding member having an opening at a portion corresponding to the panel face of the liquid crystal panel.

Description

technical field [0001] The present invention is an optical device which integrates a dimming device for modulating colored light according to image information, a color synthesizing optical element for synthesizing the colored light modulated by the dimming device, and a projector using the optical device. Background technique [0002] The mounting structure of a liquid crystal panel and a prism in a projector is disclosed in, for example, JP-A-2000-221587 or JP-A-2000-221588. In these publications, some measures are taken to improve the assembly performance and reliability of this part by housing the liquid crystal panel in the display panel frame and attaching it to the prism. At the same time, the cooling of the liquid crystal panel basically relies on the cooling of the air passage provided between the display panel frame and the prism. [0003] However, in recent years, with the progress of miniaturization and high brightness of projectors, the heat density in the devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02B7/18G02F1/1333G02F1/1335G03B21/00G03B21/14G03B21/16G03B21/20H04N5/74H04N9/31
CPCH04N9/3144H04N9/3197G03B21/006H04N9/3141G03B21/145G03B21/00
Inventor 藤森基行柳泽佳幸上原太介桥爪俊明北林雅志渡边信男
Owner SEIKO EPSON CORP
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