Projector

Abstract

A projector including light valves respectively corresponding to red light, green light, and blue light. A color combining prism (e.g., cross dichroic prism 41) combines modulated light emitted from the light valves. A projection lens enlarges and projects the combined light from the color combining prism. An aberration correction lens corrects a chromatic aberration of magnification of the projection lens. A pressing member 65 resiliently presses and fixes the aberration correction lens 42 to the color combining prism at a light entrance surface for at least one of the red, green, and blue light.

Description

technical field [0001] The present invention relates to a projector that separates white light from a light source lamp into three colors of red, green, and blue lights, and uses a liquid crystal panel or the like to light-modulate the lights of each color, and then synthesizes the modulated lights and enlarges and projects them onto the projector through a projection lens. on the screen. Background technique [0002] Conventionally, there is known a projector that enlarges and projects an image formed by an image display panel such as a liquid crystal display panel onto a screen through a projection lens. Also, as a representative of such projectors, there is known a so-called three-panel liquid crystal projector that displays color images using liquid crystal display panels for red, green, and blue light, for example. [0003] In this three-plate liquid crystal projector, light from a white light source lamp is collimated by, for example, a reflector, and the light beam i...

AI Technical Summary

Problems solved by technology

[0015] In the first conventional example, although the aberration correction lens 103 has a low light absorption rate and a low heat generation, there is a problem that the space occupied by the optical engine becomes large because an extra gap is provided behind the aberration correction lens 103.

[0016] On the other hand, the second conventional example does not have an unnecessary gap as in the first conventional example, but when the aberration correction lens 103 is attached to the color synthesis prism 102, the adhesive absorbs heat and the temperature rises. Therefore, the durability may deteriorate, and when the projected pixels become smaller, the pasting accuracy becomes strict, and there is a problem that it is difficult to manage by pasting

[0017] In addition, in the third conventional example, since the aberration correcting lens 206 is attached to the emission surface of the transparent substrate 202c on the emission side of the liquid crystal display panel 202, the same as the case of the above-mentioned second conventional example, the influence of heat absorption or the adhesion occurs. precision problem

In addition, in this case, there is also a problem that the cooling effect of the liquid crystal display panel 202 by the external air is reduced.

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