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Shutter opening and closing apparatus for beam projector

A technology for projectors and shutters, applied in projection devices, instruments, optics, etc., can solve the problems of lengthening electrical wiring, increasing the thickness of shutter components, increasing costs, etc., and achieve the effects of reducing wiring length, reducing electric power, and reducing driving load

Inactive Publication Date: 2008-05-21
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The disadvantages of the shutter opening and closing device according to the prior art in protecting the projection lens of the projector are that since the shutter member 20 moves together with the drive unit 30 mounted thereon, the thickness of the shutter assembly increases, making it difficult to manufacture small-sized, Lightweight, compact enclosures made difficult
[0010] Another disadvantage is the unavoidable use of a high-power motor resulting in increased power consumption due to an increase in driving load due to an increase in the weight of the shutter assembly, which adversely affects the reliability and quality of the product
[0011] Yet another drawback is that the electrical wiring between the drive motor and the controller is lengthened, which leads to increased cost and consequent instability in quality

Method used

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  • Shutter opening and closing apparatus for beam projector
  • Shutter opening and closing apparatus for beam projector
  • Shutter opening and closing apparatus for beam projector

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Embodiment Construction

[0033] A preferred embodiment of the projection lens shutter opening and closing device of the beam projector according to the present invention will be described in detail below with reference to the accompanying drawings.

[0034] 2 and 3, the projection lens shutter opening and closing device of the beam projector according to the present invention comprises: an outer casing 110 having an opening 112 that exposes the light output surface of the projection lens (not shown); a planar shutter member 120 disposed on the bottom surface of the outer case 110 ; and a driving unit 130 supported on the bottom surface of the outer case 110 to drive the shutter member 120 .

[0035] According to the present invention, the drive unit 130 includes a drive unit 132 capable of forward and reverse rotation, a worm gear 133 disposed at the end of the output shaft of the drive motor 130, a gear set 134 and a transmission gear 135 connected to the worm gear 133, and a gear set 135 disposed on ...

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Abstract

A shutter opening and closing apparatus for protecting a projection lens of a beam projector, wherein a shutter member is provided at an exterior case for selectively opening and closing an opening for exposing the light output surface of the projection lens and a driving unit mounted separately from the shutter member for driving the shutter member whereby the apparatus can be used as a wall hanging slim beam projector or a stand-up type slim beam projector capable of operating with a reduced consumption of electricity because of its compact, light-weight construction.

Description

technical field [0001] The invention relates to an opening and closing device of an optical lens shutter of a beam projector, and more particularly relates to a shutter opening and closing device for protecting a projection lens of a projector. Specifically, the present invention relates to a projection lens shutter opening and closing device especially suitable for thin wall-mounted or vertical beam projectors. Background technique [0002] With the upgrading of high-definition TVs and the huge market for home theater equipment, the popularity of projectors that can obtain image information through a large screen to meet consumer needs is increasing. [0003] As a representative projector, a beam projector mainly used for projection by being connected to a computer, for example, has been widely marketed and started to become popular. These types of beam projectors work by projecting a matrix of images onto a large screen by projecting beams of light at fixed pitches with i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/74
CPCG03B21/14G03B21/145H04N5/74
Inventor 陈大根
Owner LG ELECTRONICS INC
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