Projector light machine and projector

Abstract

The invention discloses a projection light machine and a projector. The projection light machine includes a housing, a beam splitting prism, a first elastic member, two second elastic members and a DMD light modulator. The inner cavity of the housing includes a rear limiting surface 1. The side limit surface, the rear limit surface is located at the periphery of the rear installation port of the housing, the side limit surface is adjacent to the first side wall surface and faces the second side wall surface; the beam splitting prism is installed in the inner cavity of the housing through the upper installation port; The initial incidence surface of the prism is set downward; the inner cavity of the housing forms a first clamping cavity and a second clamping cavity on the left and right sides of the beam splitting prism respectively; the first elastic member is arranged in the first clamping cavity or the second clamping cavity, and the second clamping cavity An elastic piece connects the left or right end surface of the shell and the beam splitting prism so that the beam splitting prism abuts against the side limit surface; two second elastic pieces are respectively located at the lower part of the first clip cavity and the second clip cavity, and the second elastic piece connects the housing The lower end of the body and the beam-splitting prism makes the beam-splitting prism lean against the rear limiting surface. The elastic member of the present invention is easy to assemble, and the dichroic prism is assembled stably in two transverse directions.

Description

technical field [0001] The invention relates to the technical field of optical projection equipment, in particular to a projection light machine and a projector. Background technique [0002] The core component of the micro projector is the projection light engine, and the beam splitting prism and the DMD light modulator are the two core components of the projection light engine. The accuracy of the relative position between the dichroic prism and the DMD light modulator has a very important influence on the projection quality. In the production process, in order to modulate the projection light machine, the common methods include: 1. Use the DMD light modulator as a fixed reference to adjust the position of the beam splitting prism; 2. Contrary to the first method, use the beam splitting prism as a fixed reference Adjust the position of the DMD light modulator. In the latter approach, the assembly of the dichroic prism itself is required to be highly stable. [0003] In ...

AI Technical Summary

Problems solved by technology

However, after changing the spatial position of the dichroic prism so that the orientation of the original upper and lower end surfaces is changed to the horizontal direction, if the stable assembly technical solution in the related art is directly applied, it is necessary to add an installation opening and a side cover on the side of the housing; and due to the original slope Or the space for installing the elastic member on the front side of the imaging exit face is relatively dispersed relative to the installation space of the first elastic member, and the installation space of the second elastic member adjacent to the upstream position of the optical path will also be located at the bottom of the cavity, at a distance from the cavity The upper opening of the cavity is far away, which inevitably leads to the difficulty of assembling the second elastic member itself and / or the components related to the elastic force transmission around the second elastic member

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