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Projection display device

A technology for a display device and a projection port, which is applied to projection devices, optics, instruments, etc., can solve problems such as the deterioration of the characteristics of a resin lens, and achieve the effect of suppressing the deterioration of the characteristics

Active Publication Date: 2011-07-27
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Higher luminance of the light source makes the deterioration of the characteristics of the resin lens more noticeable

Method used

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Examples

Experimental program
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Embodiment Construction

[0042] Embodiments of the present invention will be described below with reference to the drawings.

[0043] figure 1 It is a perspective view showing the configuration of the projector. figure 1 (a) is a perspective view of the appearance of the projector, figure 1 (b) is a perspective view of the projector in a state where the upper casing 12 and the control circuit unit are removed.

[0044] refer to figure 1 , the projector includes a main body casing 10 . The main body case 10 is composed of a lower case 11 and an upper case 12 covering the lower case 11 from above.

[0045] The lower case 11 is formed in a shallow-bottomed box shape with an open upper surface. The lower case 11 is formed such that the front surface 11F is higher than the left and right side surfaces 11L, 11R and the rear surface 11B. The left and right side surfaces 11L, 11R rise gradually at the front end and are connected to the front surface 11F.

[0046] An intake port 111 is formed on the fro...

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PUM

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Abstract

A projection display device includes an imager portion which modulates light based on an image signal; a projection lens unit (30) which includes a resin lens (20) and projects the light modulated by the imager portion; a projection port which is formed in a main body cabinet, and passes light from the projection lens unit; an air inlet which is formed in a vicinity of the projection port (121) of the main body cabinet (10); and an air passing portion (111) which draws in an air through the air inlet (EW) and passes the drawn-in air through a first row of fans (801) along the projection lens unit (30).

Description

technical field [0001] The present invention relates to a projection display device for amplifying and projecting light modulated by a light modulation element onto a projected surface. Background technique [0002] In a projection display device (hereinafter referred to as "projector"), light modulated by a light modulation element such as a liquid crystal panel is projected onto a projected surface through a projection lens unit. In such a projector, heat is generated in the power supply unit and the light source. Thus, a structure for releasing internally generated heat to the outside is used in the projector. [0003] In this case, if the high-temperature exhaust gas reaches the projected light, fluctuations will occur in the projected image. Therefore, in the heat release structure, it is necessary to provide or configure an exhaust port so that the exhaust gas does not affect the projected image (Patent Document 1). [0004] Patent Document 1: Japanese Patent Laid-O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/16G03B21/14H05K7/20
CPCG03B21/16
Inventor 桥场祐治山本祐介猿渡俊弘
Owner SANYO ELECTRIC CO LTD