Light collecting device for projection equipment

Abstract

The invention relates to a light collecting device for projection equipment, which comprises a first light collecting post and a second light collecting post which are symmetrically arranged along a symmetrical axis, wherein the emergent end parts of the first light collecting post and the second light collecting post face the symmetrical axis; therefore, light properly passes through the first light collecting post and the second light collecting post respectively, and parallelly advances along the symmetrical axis after emitting from the emergent end parts.

Description

technical field [0001] The present invention relates to a light collecting device used in projection equipment; in particular, a light collecting device that utilizes a light collecting column to integrate multiple light sources. Background technique [0002] Projection equipment has become a commonly used imaging equipment in offices, homes and conference rooms, and usually consists of a light source, prism, color wheel, imaging lens and other optical components. Among them, the light generated by the light source must be integrated through the light collecting column, and then enter the color wheel and imaging lens to be projected. The configuration and design of the light collecting column has become the key technology of projection equipment. [0003] Among the many types of projection equipment, digital light processing projection equipment (Digital Light Processing, DLP) can receive digital signals, and then generate a series of digital light pulses. The internal conf...

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Problems solved by technology

[0007] However, there are still many disadvantages in the structure of the prior art

First of all, the above-mentioned methods must be equipped with a light-collecting column (such as the aforementioned light-collecting column 223 or the third light-collecting column 243) at the end to eliminate shortcomings such as dark lines at the junction of the front prisms, and integrate the light from different light sources into a conforming Digital micromirror device size; conceivably, the more light collecting rods or optical elements are used in the light combination process, the more light loss will be caused, and the complexity of assembly will also increase

[0008] In addition, the existing light source configuration method is more difficult in the arrangement of heat dissipation

Since the wick of each light source will generate high temperature locally, it is necessary to configure a fan to dissipate heat for the wick, and additionally configure a system fan to export the hot air inside the projection device. However, if Figure 2B In the existing structure shown, since the light sources are all arranged at the same horizontal position, the configuration of many fans will be more complicated, and the circulation of the air flow will not be smooth, resulting in poor overall heat dissipation efficiency, high operating temperature, and long service life of the wick. Reduced, and not conducive to the configuration of components inside the projection device

Moreover, setting the light sources at the same level has the disadvantage of being difficult to replace, which increases maintenance costs

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