Dynamic shading apparatus and projector using the same

A shading device and dynamic technology, applied in projection devices, installation, optics, etc., can solve problems such as shading device vibration, motor overheating, shading device failure, etc., to achieve the effect of isolating heat from entering, preventing failure, and suppressing vibration

Inactive Publication Date: 2009-05-13
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the traditional shading device controls the passage of different amounts of light, so the shape design of the shading part and the light-transmitting part are not completely symmetrical, and the color wheel of the shading element is driven by a motor, so the traditional shading device is prone to vibration due to imbalance, resulting in shading device failure
In addition, due to the continuous irradiance of light on the shading surface, the heat will be conducted to the motor through the shaft, causing the motor to overheat and fail. Therefore, the problem of heat dissipation needs to be solved urgently.

Method used

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  • Dynamic shading apparatus and projector using the same
  • Dynamic shading apparatus and projector using the same
  • Dynamic shading apparatus and projector using the same

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Embodiment Construction

[0027] A dynamic shading device according to a preferred embodiment of the present invention will be described below with reference to related drawings, wherein the same components will be described with the same reference symbols.

[0028] Please refer to Figure 1A , Figure 1B and Figure 1C , the dynamic shading device 1 according to a preferred embodiment of the present invention includes a motor 11 , a shading element 12 and a counterweight 13 . The dynamic shading device 1 can be installed on a projector or other devices for controlling the amount of light passed by the light source. The light shielding element 12 has a light shielding portion 121 and a hub portion 122 , and the hub portion 122 is connected to the light shielding portion 121 . The motor 11 can be a stepping motor, and has a rotating shaft 111 sleeved with a hub 122 . The light-shielding portion 121 has an opening O, and the opening O is used to control the passing amount of light. In this embodiment,...

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PUM

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Abstract

The invention discloses a dynamitic shading device which comprises a motor, a shading element and a counterweight. The motor is provided with a rotating shaft; the shading element is provided with a shading part and a hub part connected with the shading part; and the hub part is sheathed on the rotating shaft. The counterweight is arranged in the shading element.

Description

technical field [0001] The invention relates to a light amount adjusting device of a projector, in particular to a dynamic shading device and a projector using the same. Background technique [0002] In general optical devices, such as front projection projectors, rear projection projectors, or cameras, etc., a control mechanism for passing light is required to generate image data with different brightness. In the case of a projector, the light source module generates light of a single color to a color wheel, and after being converted into colored light, it is necessary to continuously adjust the ratio of the amount of light passing through to produce an appropriate brightness and a good contrast ratio of the projected image. In order to meet this requirement, the prior art usually adopts a dynamic shading device to improve the projected image quality by continuously adjusting the amount of light passing through the light source. [0003] However, the traditional shading de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/00G03B21/00
Inventor 廖立群梁俊伟游锦祥
Owner DELTA ELECTRONICS INC
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