A projector

Abstract

The invention provides a projector. An optical element makes temperature higher above zero DEG, and prevents water vapor generate condensation of moisture on the optical element because of evaporation of dew generated by a cooler. The device is provided with a light source lamp, a color separation optical system that separates light ejected by the light source lamp, a light modulation component that concocts light of at least primitive colors that separated by the color separation optical system corresponding to image information, and a color synthesis optical system that synthesizes light concocted by the light modulation component; the device also comprises a heat insulation room inside the device that is used for heat insulation and equipped with the color separation optical system andthe color synthesis optical system; a cooling chamber that supplies cold air after heat exchange by the collar to the heat insulation room; and a heating mechanism set on the color separation opticalsystem and / or the color synthesis optical system, which is started when main body of the device stops running.

Description

technical field [0001] The present invention relates to a projector device (projection type image display device) that modulates and synthesizes light of at least three primary colors according to image information to generate projection light, and projects an image onto a screen through a projection lens Background technique [0002] In most existing projector devices, the light source used to generate light of the three primary colors is a light source lamp such as a metal halide lamp or an ultra-high pressure mercury lamp. In the case of a so-called three-plate type, the light source is separated by a dichroic mirror. The white light emitted by the lamp is divided into three primary colors of red (R), green (G), and blue (B). After the three primary colors are modulated according to the image information and synthesized by a color synthesis prism (dichroic prism), the three primary colors are captured by the projection lens. The image is enlarged and displayed on the scre...

AI Technical Summary

Problems solved by technology

[0009] If such condensation occurs on the surface of the color synthesis prism or condenser lens, it will have a significant impact on the production of projected light, and even if the condensation water evaporates, the surface will be polluted, dirty or left attached. dust, which, in this case, degrades the quality of the projected image and has to be cleaned

However, the portion where the optical elements are arranged is a structurally narrow portion, so cleaning is not easy, and even if the cleaning operation is performed, there is a risk of damage to the optical elements and wiring, so it is desirable not to perform maintenance on this portion.

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