Projector capable of automatically adjusting projection brightness and method

Abstract

The invention provides a projector capable of automatically adjusting projection brightness and a method. The projector comprises a memory, an optical sensor, a controller, a power supply controller, an optical engine and a projection lens group. The memory is used for storing a preset illuminance interval, wherein the preset illumination intensity interval is from 750lux to 1500lux; the optical sensor is used for receiving light from a projection surface; a controller is used for obtaining light illuminance from the optical sensor, and determining whether the light illuminance is in the preset illuminance interval stored in the memory; the power supply controller is used for controlling a power supply to adjust the illuminance of a light source when the illuminance of light from the optical sensor is not within in the preset illuminance interval, so that the illuminance of the light from the optical sensor falls into the preset illuminance interval; the optical engine is used for providing an image, and the projection lens group is used for projecting the image provided by the optical engine to a projection surface via illumination of the light source. By adopting the projector, the influence of light of an external environment on the projection brightness can be avoided.

Description

technical field [0001] The invention relates to a projector with the function of automatically adjusting projection brightness and a method thereof. Background technique [0002] At present, the brightness of the light transmitted by the projector will be affected by the ambient light, which will affect the clarity of the projection. Especially for the micro projector, users often carry the micro projector to use in different environments, and some ambient light cannot pass through the use. It is controlled by the operator itself, which will cause the problem of insufficient or excessive brightness of the projection. Contents of the invention [0003] The main purpose of the present invention is to provide a projector and method with the function of automatically adjusting the projection brightness, and adjust the brightness of the light source in the projector by sensing the illuminance value of the light reflected back from the projection surface, so as to solve the abov...

AI Technical Summary

Problems solved by technology

[0002] At present, the brightness of the light transmitted by the projector will be affected by the ambient light, which will affect the clarity of the projection. Especially for the micro projector, users often carry the micro projector to use in different environments, and some ambient light cannot pass through the use. The operator can control it by himself, which will cause the problem of insufficient or excessive brightness of the projection.

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