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Projector

A technology of projection TV and clamping device, which is applied in the direction of using projection device image reproducer, projection device, projector with built-in screen/external-mounted screen, etc. question

Inactive Publication Date: 2008-07-30
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the lamp is burnt out, then the rear projection type TV unit will not be able to display the picture at all
In addition, if it takes a long time to repair, the rear projection type television set cannot be used for a long time
[0012] In addition, if the lamp is burnt out, since the lamp generates high-temperature heat, such a burnt-out lamp must be replaced by a professional, so that replacement of such a useless lamp is not easy, and it takes a lot of time to replace the useless lamp
Therefore, compared with a television receiver with a CRT, the user cannot watch desired images for a long time
[0013] As described above, the large-sized rear projection type television set has the above-mentioned problem that although this lamp is necessary as a light source for this rear projection type television set, its life is not long, and the fork is not easy to replace when it burns out.

Method used

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Embodiment Construction

[0032] A rear projection television device according to the present invention, ie, a liquid crystal rear projector, will be described below with reference to the accompanying drawings. Figure 2 to Figure 6 in and figure 1 The same elements are given the same reference numerals for a clearer understanding of the invention.

[0033] Such as figure 2 and image 3 As shown, the liquid crystal rear projector 1A includes an upper housing 2A and a lower housing 3A.

[0034] The upper case 2A has a rectangular frame portion 10 at its front and a screen 4A fixed to the frame 10 . Such as image 3 As shown, the upper case 2A has a box shape, is hollow inside, and is closed around its periphery. Specifically, the upper case 2A includes an upper wall 11 , respective side walls 12 , a rear wall 13 and a bottom wall 14 . The reflection mirror 5A is fixed on the inner side of the rear wall 13 through a bottom plate (not shown).

[0035] The lower case 3A has all the components requi...

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Abstract

A light source for use in a liquid-crystal rear projector serving as a projection apparatus can be changed from a front to thereby improve a performance of the apparatus. The liquid-crystal rear projector serving as the projection apparatus includes a light source accommodating portion provided at a front for accommodating therein a lamp house having a lamp light source, the lamp house being of a cartridge type accommodated in the light source accommodating portion, and a handling portion disposed at a front of the accommodated lamp house for explaining how to exchange the lamp house.

Description

[0001] Related application statement [0002] This application is a divisional application of a patent application with an application date of October 3, 1996, an application number of 96121173.3, and an invention title of "projection device". technical field [0003] The present invention relates to a rear projection device, and more particularly, to a rear projection device having a light source for projecting light from behind a screen to project an image. Background technique [0004] Such a rear projection TV device, such as a liquid crystal rear projector (hereinafter referred to as "liquid crystal rear projection TV") installed in a TV device, includes a liquid crystal display part (hereinafter referred to as "LCD"), a convex lens, a light source, and a reflection mirror. Optical devices, as well as screens positioned in front of them, are already known. [0005] The liquid crystal rear projector can reduce its depth and widen its screen, and the liquid crystal rear ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/64G02B27/18H04N5/74H04N9/31G02F1/13G03B21/20
CPCG03B21/10H04N9/3141G03B21/145G03B21/20G03B21/2093H04N5/74
Inventor 根岸史明山下胜弘铃木章夫九里大志
Owner SONY CORP
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