Optical regulator

Abstract

This invention provides one audio play system optic al adjusting device, which is to adjust the focus of one lens set in system, wherein, the lens set comprises one first lens set and one second lens set; the adjusting device comprises one controller to generate one adjusting signal and one movable device to connect to the controller and lens set and to adjust positions of first and second lens set according to signals to alternate the lens set focus and imaging focus.

Description

[0001] The technical field to which the invention belongs [0002] The invention relates to an adjustment device, in particular to an optical adjustment device applied to an audio-video playback system. Background technique [0003] The image projected by the current rear-projection TV, because the lens is in the form of a fixed focal length, the focal length of the lens cannot be changed, so there is no way to change the size of the image, so the current rear-projection TV does not have the function of zooming in or reducing the image. [0004] refer to figure 1 , figure 1 It is a schematic diagram of an image projected by a rear projection TV 10 in the known technology. Such as figure 1 As shown, because the edge of the image 14 projected by the rear projection TV 10 often has unstable interference signals, the image 14 is usually enlarged to make the image 14 larger than the size of the screen 12, and then the screen 12 is used to capture stable However, the general rea...

AI Technical Summary

Problems solved by technology

like Figure 2B As shown, when the lens 20 projects an enlarged image, the overall brightness will be beyond the range of the screen 22 and blocked by the screen so that the image cannot be projected outward. This will cause refraction of light, and then the overall brightness of the image will be lost, so it will be reduced. image clarity

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