JPH02257191A - Projection type display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a projection type display device for displaying video images, computer images, and the like. In particular, the present invention relates to a projection type display device using a transmission type light valve, which has excellent contrast and can realize a compact size.

[Prior Art 1] A conventional projection type display device using a transmission type light valve has been proposed, such as one having a configuration as shown in FIG. (
SID87 DIGEST 75P) A version with 70,400 pixels is planned to be commercialized.

[Problems to be Solved by the Invention] However, the above-described projection type display device had a drawback in that the life of the light source was short. As a result, situations often arise where, for example, the light source goes out while enjoying a movie, and the user has to replace the light source each time.
I felt uncomfortable. I had such a problem.

[Means for Solving the Problems] A projection type display device of the present invention collimates light from a light source, modulates it with a transmission light valve, and modulates it with a projection optical means. The type display device includes a light source unit group having two or more light source units including collimating means, and has a function that allows another light source unit to be used immediately by rotating the light source unit group. It is characterized by

[Function 1] In the projection type display device configured as described above, even if the light source is cut out during use, the spare light source unit can be immediately used by rotating the light source unit group. Furthermore, by providing a function that automatically rotates the light source unit group, the user virtually does not need to replace the light source, and the image is displayed only for a few seconds while the light source unit is automatically rotating. It's just an inconvenience because it stops, so you don't have to worry about it. The user can simply replace the light source unit that has slowly broken down after enjoying the video or the like.

Hereinafter, the present invention will be explained in detail using examples. However, the present invention is not limited to the following examples.

(Example 1) FIG. 1 is a diagram showing the configuration of a projection type display device of the present invention. 1 is a light source unit group containing a plurality of light source units. 2 to the light source unit 1 in use. 3 is a spare light source unit. 4 is a groic mirror 5 is a mirror 6
is a transparent light bulb. 7 is the Guicroic Prism.

8 is a projection lens. 9 is a screen.

As is clear from the figure, if the light source unit 2 in use breaks down, one light source unit group rotates and a spare light source unit 3 can be used. (FIG. 3) At this time, in conjunction with switching to the light source unit 1 to be used, the power line supplied to the light source is also changed.

A malfunctioning light source unit 10 can be replaced with a new light source unit after using the projection display device, or the entire light source unit may be replaced without replacing the light source unit.

Although the light source unit group can be rotated manually, the addition of an automatic function has made it even easier to use. That is, there is no need for the user to replace the light source while using the projection display device. The user only has to replace the malfunctioning light source unit after use.

It is obvious that the present invention is effective for both front and rear types.

[Comparison example] FIG. 4 shows the configuration of a conventional projection display device.

If the light source breaks down, the light source or light source unit must be replaced even during use, which causes discomfort to the user.

[Effects of the Invention 1] The projection display device of the present invention is a projection display device in which light from a light source is collimated, modulated by a transmission light valve, and modulated by a projection optical means. Equipped with a light source unit group having two or more light source units including collimating means, and equipped with a function that allows you to immediately use another light source unit by rotating the light source unit group, which reduces the hassle of replacing the light source. is significantly reduced. Furthermore, by adding a function to automatically move the light source unit, the user does not need to replace the light source, which eliminates the problems associated with using conventional projection display devices. It has the effect of being able to.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a projection type display device of the present invention. FIG. 2 is a configuration diagram of a light source unit group of the present invention. FIG. 3 is a configuration diagram of a conventional projection display device. Light source unit group ・Light source unit in use Spare light source unit Guicroic Mira ゛ζζtsu - Transparent light bulb ・Gicroic Prism projection lens ·screen

Claims (1)

[Claims] In a projection display device that collimates light from a light source, modulates it with a transmission light valve, and modulates it with a projection optical means,
The projection type display device includes a light source unit group having two or more light source units including collimating means, and has a function that allows another light source unit to be used immediately by rotating the light source unit group. A projection display device characterized by: