Projector with cleanable protective cover for camera lens

A protective cover and projector technology, applied in the field of projectors, can solve problems affecting light transmittance, etc., to achieve the effect of ensuring projection effect, good light transmittance, and prolonging service life

Inactive Publication Date: 2007-08-01
XINCHENG ZHIDIAN NETWORK TECH CO LTD SHANGHAI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual work, absolute ethanol is generally used to clean the glass surface of the lens. However, although absolute ethanol volatilizes quickly, it absorbs water quickly. Therefore, after the lens is cleaned with absolute ethanol, it often forms a stain on the lens surface. A layer of water stains will affect the light transmittance, and the degree of influence can reach 10%

Method used

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  • Projector with cleanable protective cover for camera lens

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Embodiment Construction

[0014] Referring to Fig. 1, the projector with a washable lens protective cover of the present invention includes a housing 1 and a light engine, a circuit board, a light source and a corresponding heat dissipation mechanism arranged in the housing 1, and the projection lens 2 in the light engine protrudes On one side of the casing, a washable lens protective cover 3 is covered on the projection lens. The washable lens protection cover is a light-transmitting body coated with anti-reflection coating on both sides, and the light-transmitting body is made of CR39, PC or similar light-transmitting materials.

[0015] The washable lens protection cover in the projector with the washable lens protection cover of the present invention is a part of the projection lens in terms of optical characteristics, and completes the projection of images together with the projection lens. Radius of curvature, thickness and refractive index, etc.) are designed and determined together with the pro...

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PUM

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Abstract

This invention provides one projection machine with clear lens head protection cover, which comprises shell, light engine inside shell, circuit board, light source, and relative dissipation structure, wherein, the light engine projection lens stretches out of shell; the projection lens head is covered with flexible loading protection cover. This invention adopts clear lens protection cover kept on the lens head in work.

Description

technical field [0001] The invention relates to a projector, in particular to a projector with a washable lens protection cover. Background technique [0002] Projectors are widely used in education, business and home. A common projector generally includes a housing, a light engine, a circuit board, a light source and a corresponding heat dissipation mechanism arranged in the housing. According to the number of lenses used in the light engine, projectors can be divided into single-lens projectors and three-lens projectors. In terms of design, the white light generated by the light source is generally separated into red, green and blue three-color light, and the three-color light is modulated by three liquid crystal light valves respectively. The modulated three-color light is different according to the design of single lens or three lenses. processed in different ways. In a single-lens projector, the three-color light is synthesized with a color combining element and proj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/14
Inventor 邓运明
Owner XINCHENG ZHIDIAN NETWORK TECH CO LTD SHANGHAI
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