JPH0468689A - lcd projector - Google Patents

Abstract

PURPOSE:To avoid the deterioration of performance caused by the heat source conduction from a light source by fixing a light source enclosure holding the light source an a cold mirror to an optical supporting member only in the vicinity of an installation part and constructing this projector so as to be through an air layer with non-connection other than the vicinity of the installation part. CONSTITUTION:A light source 1 and a cold mirror 2 separating infrared rays and visible rays are held by a light source box 3. An optical supporting member 4 holding a panel an a dichroic mirror pinches the light source box 3 with a part in construction, and is connected to the light source box 3 through the air layer by integrally provided plural connection members 5A-5F. Thus, since the member 4 and the box 3 are fixed with the minimum space by the connection members 5A-5F, the heat conduction from the light source 1 to the member 4 is extremely small, the heat from the light source 1 is smoothly discharged by a fan 8, and the increase of the temperature in the entire set can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a liquid crystal projector that enlarges and projects liquid crystal panels using light from a light source, and particularly relates to a structure that reduces the effect of heat from the light source on the panel. The present invention relates to a liquid crystal projector.

2. Description of the Related Art Devices for enlarging and projecting a liquid crystal panel using a light source such as a metal halide have been on the market, and are called liquid crystal projectors. This is driven at high voltage to increase the brightness of the light source, but at the same time it emits considerable infrared light.

Therefore, the temperature inside the center, especially near the light source, becomes quite high. However, LCD panel-related components are easily affected by temperature, so there was a need for a structure that would prevent heat from the heat source from being conducted to the liquid crystal part.

Problems to be Solved by the Invention However, in general, the light source block is constructed integrally with the base chassis in order to achieve optical system accuracy, and as a result, panels, lenses, etc. are easily affected by heat, causing performance deterioration. Ta. In addition, there was a need to quickly discharge the further temperature rise of the block due to the high brightness to the outside.

In view of this, the present invention provides a liquid crystal projector that is constructed so that the heat of the light source block, which is a box body, is not easily conducted to the parts when mounted on the panel, in order to avoid as much as possible the performance deterioration of the panel and lens due to the heat source from the light source. − The purpose is to provide.

Means for Solving the Problems In order to solve the above problems, the liquid crystal projector of the present invention includes a light source, a cold mirror that separates visible light and infrared light from the light source, and a cold mirror that separates visible light and infrared light from the light source. a liquid crystal group to be controlled; an optical system that enlarges or reduces an image formed by the liquid crystal group using light from the light source; an optical support member that holds the liquid crystal group and the optical system; and a box that holds the light source and the cold mirror. A liquid crystal projector comprising a light source box having a shape, wherein the light source box is connected and fixed to the optical support member only in the vicinity of the mounting part, and is not connected except in the vicinity of the mounting part through an air layer. That is.

According to the present invention, the box-shaped light source box holding the light source and the cold mirror is connected and fixed to the optical support member only in the vicinity of the attachment part, and is not connected except in the vicinity of the attachment part through an air layer. Since it is a liquid crystal projector, it is possible to avoid performance deterioration of the panel and lens due to heat conduction from the light source.

Embodiment FIG. 1 shows a liquid crystal projector according to an embodiment of the present invention.
FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 shows a part of the connection between the light source block and the main body. It is an enlarged view of.

In FIGS. 1 to 4, 1 is a light source, 2 is a cold mirror that separates infrared light and visible light, and 3 is a light source box that holds these. Further, there is an optical support member 4A that holds a panel, a guichroic mirror, etc.

4B is configured to partially sandwich the light source box 3, and is connected to the light source box 3 via an air layer by a plurality of integrally provided connecting members 5A to 5F.

Specifically, the fixing members between the light source box 3 and the supporting members 4A and 4B are screws 6 for each of the connecting members 5A to 5F.

Additionally, the entire centrifuge 7, a fan 8 for discharging heat to the outside, and the like are other components.

As described above, in the liquid crystal projector of this embodiment, the optical support member 4 and the light source box 3 are fixed in a minimum space by the connecting members 5A to 5F.

Therefore, according to this embodiment, the heat conduction from the light a1 to the optical support member 4 is extremely small, and the heat from the light source 1 is smoothly discharged to the outside by the fan 8, making it possible to avoid an increase in the temperature of the entire cent.

In addition, in FIG. 1, color separation is performed when white light emitted from a light source 1 passes through a total reflection mirror 9 and then passes through a guichroic mirror 10.
a to 10c, the components are separated into red, blue, and green, which are collected by the lens 11 and displayed on the respective liquid crystal panels 12 (12a to 12).
c). The liquid crystal panel 12 is attached to the metal fittings 13 respectively, and 0-color composition is also performed in the same way, and red, blue, and green are combined into white light by the dichroic ink mirrors 14a to 14c.

Effects of the Invention As described above, the present invention includes a light source, a cold mirror that separates visible light and infrared light from the light source, a liquid crystal group that controls the transmission of the light from the light source, and a liquid crystal group that controls the transmission of the light from the light source. A liquid crystal projector comprising an optical system for enlarging and reducing an image formed by a liquid crystal group, an optical support member for holding the liquid crystal group and the optical system, and a box-shaped light source box body for holding the light source and the cold mirror. The light source box body is connected and fixed to the optical support member only in the vicinity of the mounting part, and is not connected except in the vicinity of the mounting part through an air layer, thereby reducing the heat transfer from the light source to the optical support member. Conduction is extremely low, and the heat from the light source is smoothly discharged to the outside by the fan, avoiding a rise in temperature of the entire center. Therefore, it is possible to suppress image unevenness due to a rise in the temperature of the panel, which has a great practical effect.

[Brief explanation of drawings]

FIG. 1 shows a liquid crystal projector according to an embodiment of the present invention.
2 is a side view of FIG. 1, FIG. 3 is a plan view thereof, and FIG. 4 is a detailed view of section A in FIG. 3. 1...Light source, 2...Cold mirror,
3... Light source box, 4... Optical support member,
5... Connection member. Name of agent: Patent attorney Shigetaka Awano Haka 1 person! −1
Yugen 2- Cold Me 5- 3-=*, negative box

Claims (1)

[Claims] a light source, a cold mirror that separates visible light and infrared light from the light source, a liquid crystal group that controls transmission of light from the light source, and an optical system that enlarges or reduces an image formed by the liquid crystal group using the light from the light source. an optical support member that holds the liquid crystal group and the optical system; and a box-shaped light source box that holds the light source and the cold mirror, the light source box that supports the optical support. A liquid crystal projector configured to be connected and fixed to a member only in the vicinity of the mounting part, and not connected except in the vicinity of the mounting part through an air layer.