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Projection display device

A technology of a display device and a projection unit, which is applied to projection devices, optics, instruments, etc., and can solve problems such as narrowing the size adjustment range of projected images, inability to reduce the minimum size of projected images, and restrictions on the shape and size of the projector body, etc. To achieve the effect of compact body shape

Inactive Publication Date: 2011-11-16
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when adjusting the size of the projected image by moving the projector closer to or away from the screen, the minimum size of the projected image cannot be reduced, and the adjustment range of the size of the projected image becomes narrower.
[0008] As described above, for a projector with an oblique projection structure, there are various restrictions on the shape and size of the main body of the projector.

Method used

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Examples

Experimental program
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Embodiment Construction

[0046] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0047] figure 1 and figure 2 It is a figure which shows the external appearance structure of a projector. figure 1 (a) is a perspective view of the projector viewed from the front, figure 1 (b) is a perspective view of the projector viewed from the rear. in addition, figure 2 is the bottom view of the projector. It should be noted that, for the convenience of explanation, figure 1 (a), (b) and figure 2 Arrows are drawn to indicate the front, rear, left, and right directions, respectively. Hereinafter, arrows indicating front, rear, left, and right directions are similarly drawn as necessary in other drawings.

[0048] The projector of this embodiment is a so-called short-throw type projector. refer to figure 1 , the projector includes a main body casing 1 having a substantially rectangular parallelepiped shape. The main body case 1 is composed of a lower c...

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PUM

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Abstract

The present invention provides a projection display device, which may make the shape of a main body using an inclined projection structure compact, without reducing the projection function. The projection display device includes: a lamp unit (14), a light modulating unit (15), a projection optical unit (17), a control circuit portion (23) and a main boby cabinet (1). The projection optical unit (17) includes a projection lens unit (101) and a mirror portion (102) which reflects the light having passed through the projection lens portion (101) and lets the light travel toward a projection plane. The mirror portion (102) is disposed so as to be shifted from an optical axis of the projection lens portion (101) in a direction opposite to a direction in which the incident light from the projection lens portion is turned back. The control circuit portion (23) is disposed in a space (G) which is produced between the projection lens portion (101) and the main body cabinet (1) by a position gap between the projection lens portion (101) and the mirror portion (102) .

Description

technical field [0001] The present invention relates to a projection display device that modulates light from a light source by a light modulation element and magnifies and projects it onto a projected surface. In particular, it relates to imaging an image on the light modulation element as an intermediate image between a projection lens portion and a mirror portion, A projection display device that enlarges and projects the intermediate image to the mirror. Background technique [0002] Conventionally, in projection display devices such as liquid crystal projectors (hereinafter referred to as "projectors"), the projection optical system has been widened in order to shorten the distance between the screen and the projector. In addition, along with the widening of the angle of view, a projector having a configuration for oblique projection has been proposed in which projection light emitted from the projector is projected toward a screen from an oblique direction. [0003] I...

Claims

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Application Information

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IPC IPC(8): G03B21/14G03B21/20G03B21/16G03B21/00
CPCG03B21/28G03B21/14H04N9/3141G03B21/145
Inventor 小谷和范吉村太一久保敦志李在炫神原稔昌长田泰辅粉川博之渡部慎一
Owner SANYO ELECTRIC CO LTD