Liquid crystal projection lamp and control method thereof

Abstract

The invention discloses a projection lamp and a control method thereof; the projection lamp comprises an LED array light source, a control system, an imaging system with an infrared filter, a light condensing mirror, a front lens, a light-transmission liquid crystal plate, a rear lens and a group of projection lenses, a temperature detector which collects the temperature signal in the projection lamp, a cooling system, and a pair of wedge-shaped light pipes which are used for homogenizing and collimating light beam; the infrared filter is arranged in front of the wedge-shaped light pipes; the light source enters the imaging system through the wedge-shaped light pipe; the control method comprises the steps as follows: firstly, the power supply is turned on, the control system is started, the image signal input by a host computer is scanned and processed, simultaneously, the temperature signal is collected so as to carry out the comparison treatment; the cooling system is adjusted according to the temperature signal. The projection lamp has low cost, smart and convenient use, can be used for projecting the colorful images for a long time, can change the color of the patterns, prolong the service life of the projection lamp, and extend the application range of the projection lamp.

Description

technical field [0001] The invention relates to a projection lamp for playing color patterns, in particular to a liquid crystal projection lamp using LED as a light source. Background technique [0002] At present, the mainstream projection lamps on the market, such as the calligraphy and painting projection lamp in the ZL200720063414.4 patent, and the colorful combination projection lamp in the ZL0225620.2 patent, mostly use light sources to illuminate slides, and directly illuminate the projection screen through optical devices, such as ZL The color trademark projection lamp disclosed in 99215584.3 does not need optical devices at all, directly irradiates the pattern with light, and utilizes light scattering for projection. Also have to adopt light source to be fixed, and the scheme that slide is rotated by motor rotation expresses projection effect, as the phantom projection lamp of ZL97237375.6 patent. Since the slides used in these projection lamps are fixed, they cann...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problem that the projection lamp in the prior art can neither project the colored slides for a long time, nor can it play the slides automatically, or it can meet the functional requirements but the cost is very expensive. The disadvantage is to provide a liquid crystal projection lamp that can automatically and continuously play, and has a moderate cost and a long service life and a control method for the projection lamp

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