JPS63123019A - Liquid crystal display multiple projection device - Google Patents

Abstract

PURPOSE:To accurately reduce the size of a device and to position many projection surfaces by assembling a lighting unit, an image installation unit with an adjusting function for transmission image plane twisting, and a projection lens installation unit on a base plate. CONSTITUTION:Plural projection devices A consisting of lighting units 1, image installation units 2, and projection lens installation units 3 are assembled on the base plate B. Their image planes are positioned mutually by rotating the fitting position adjustment part 3b of a lens 3a with large depth of focus to determine the size of an image, a projection lens installation flange 3c is moved forth and back, and right and left, and the twisting of an image is adjusted by rotating a liquid crystal fitting part 2c. Further, the enlargement accuracy of a projection lens 3a is determined for distortion according to required image composition accuracy. Consequently, many projection planes are accurately position and a large-sized liquid crystal display is realized.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides multi-projection using a plurality of projection devices that enlarge and project a transmitted image formed on a liquid crystal display onto a screen using an illumination device and a projection lens. The present invention relates to a liquid crystal display multi-projection device configured to.

<Conventional technology> Increasing the area of liquid crystal displays has been achieved, for example, by Nikkei Electronics [Accelerating development of large liquid crystal displays (8th
It is known that a panel with a pixel count of 640 x 400 dots and a size equivalent to a 12-inch panel has been published by J (1985, December 30, 1985, daily edition), etc. (pp. 1-93).

<Problems to be Solved by the Invention> However, in the case of liquid crystal displays, increasing the size of the panel beyond the above-mentioned size still has technical problems and has not yet been realized.

The present invention has been made in view of the problems of the prior art, and uses a plurality of liquid crystal displays to perform multi-projection on a screen. The purpose of the present invention is to provide a liquid crystal display multi-projection device that can easily obtain high-quality, high-definition images.

A liquid crystal display multi-projection device according to the present invention for achieving the above-mentioned objects includes: an illumination unit having a built-in light source and emitting illumination light; and a liquid crystal display that forms a transmitted image. an image installation unit having a liquid crystal mounting part configured such that the mounting torsion can be adjusted according to the optical axis without changing the liquid crystal display itself, and the transmitted image is illuminated with the illumination light; When a projection lens is installed and the transmitted image of the liquid crystal display irradiated with the illumination light is enlarged and projected onto the projection screen using the projection lens, the size of the projected image is determined within the focal depth of the projection lens as a whole. A projection device including a projection lens installation unit configured to be able to adjust the vertical position of the projection lens, and a plurality of the projection devices are roughly installed.

The projection apparatus includes at least a base plate having a structure that allows adjustment between the projection apparatuses.

<Example> Hereinafter, an example of the present invention will be described with reference to the configuration diagram of a liquid crystal display multi-projection apparatus as a specific example of the present invention shown in FIG.

In FIG. 1, there are a plurality of projection apparatuses A each consisting of a plurality of functional units (in this embodiment, a case of four is shown).
Such a large-scale projection device A is prepared using a one-piece base plate B.
The position etc. are adjusted and assembled.

The functional units of the projection apparatus A include a plurality of functional units: an illumination unit 1, an image installation unit 2, and a projection lens installation unit 3.

The lighting unit 1 includes, for example, a lamp (light source) 1c installed in a lamp case 1a and a lamp cover 1b to emit illumination light α, and a condenser lens 1d that condenses the light emitted from the lamp 1C. In combination with a reflection mirror 1e provided to change the optical path of the light collected by the condensing lens 1d by, for example, 90 degrees, and a projection lens to be described in detail later, an image is successfully formed on a projection screen (not shown). Each of them is composed of a condensing Fresnel lens 1f placed at a certain position, and a bracket 1q that integrates these parts into an integral structure.

The image installation unit 2 includes a bracket 2a, three rollers 2b provided on the bracket 2a, and the three rollers 2b.
A transmissive liquid crystal display 4, which is formed of a disk-shaped easel supported on rollers 2b, and which forms a transmissive image, is mounted using fasteners 2c, and the twisting caused when the liquid crystal display is mounted is It is supported on the three rollers 2b using the liquid crystal position adjustment knob 2C2 without changing the 4 itself, with a rigidity that does not move by normal vibration etc., and that can be adjusted (rotated) for the optical axis. LCD mounting part 2
C, and a reflecting mirror 2d provided to change the optical path of the transmitted image of the liquid crystal display 4 illuminated with the illumination light α by, for example, 90°.

The projection lens installation unit 3 has a projection lens 3a in order to enlarge and project the transmitted image β of the liquid crystal display 4 from the image installation unit 2 onto the projection screen to a predetermined size.
The projection lens 3a is assembled with a screw, for example, and the size of the projected image can be adjusted by adjusting the vertical position of the entire projection lens within the depth of focus of the projection lens. The projection lens installation flange 3C has a structure in which the lens mounting/position adjustment part 3b and the projection lens mounting/position adjustment part 3b are assembled with a screw 3b and can be assembled to a single-piece base plate B. It is configured.

The single-piece base plate B is used to facilitate alignment of the projection screens on the projection screen when four projection devices A having the above configuration (the other three have the same configuration) are assembled. At least these components are assembled so that the positional relationship between them can be adjusted. Here, a case is shown in which the projection apparatus A is assembled into a structure in which the positional relationship and the like of the individual functional units can also be adjusted. That is, this base plate B is
The projection lens installation flange 3C is assembled into 7 lunge holes B+ so that the positional relationship can be adjusted (the diameter is such that it can be moved forward, backward, 6, left and right, etc.; the same applies hereinafter), and the projection lens inserted into the flange hole B1. Lens installation flange 3C
A hole B2 into which a screw 5 can be inserted for fixing after the position has been adjusted, a knob adjustment hole B3 having a width and length that allows the liquid crystal position adjustment knob 2C2 to rotate, and a knob adjustment hole B3. The screw 6 is used to fix the image installation unit 2 to the base plate 8 after the liquid crystal position adjustment knob 2C2 is inserted and the entire position of the image installation unit 2 is adjusted including the relationship with the optical axis.
A hole B4 into which a screw can be inserted, and a hole B5 into which a screw 7 can be attached for fixing the lighting unit 1 to the second hole B are provided. are adjusted including the relationship of the optical axis, etc., and fixed with each screw 5 to 7), and these 8 holes are connected to the projection device A.
Machining according to the number of fixing screws, etc. (in Fig. 1, the distance between the projection screen and the base plate B is predetermined, that is, the magnification is almost fixed,
In the case of a machine in which the holes 81 to B5 allow the adjustment amount of each unit to be adjusted by a minute amount of movement of ±mm, the 7-lunge hole B1
In other words, the center-to-center distance is machined to 1/2 the length of each side of the projected image.

In such a configuration, the projection images are aligned as follows.

■: The size of both images can be varied within the depth of focus by selecting a lens with a deep depth of focus. to move the projection lens 3a up and down (arrow γ
) and change the focal length.

(2) The alignment of the two images in the longitudinal and lateral directions (χ, y directions) is performed by moving the projection lens installation flange 3C by ± several mm.

(2): Both image torsions are adjusted by rotating the liquid crystal mounting portion 2C on the three rollers 2b on the optical axis using the liquid crystal position adjustment knob 2C2.

(2): Nib distortion is determined by the magnification accuracy of the projection lens 3a, so it is determined by the required image synthesis accuracy.

<Other Examples> The present invention is not limited to the configuration shown in FIG.

For example, the shape of the base plate B (number of holes, arrangement, overall size, etc.) can be arbitrarily changed depending on the number and arrangement of the projection devices A. Here, if the number of projection devices A is 2.3.5, the shape of the base plate B may be a large comb depending on the number of installations, and the projection devices A may be arranged in a horizontal row.

Of course, it goes without saying that the installation method and the number of installations can be arbitrarily changed depending on the installation.

In addition, by changing the shape and number of the eight holes in the base plate B as shown in the diagram of other embodiments in FIG. Needless to say, it can be changed and adjusted.

Furthermore, the structure of each unit can be arbitrarily modified by changing the design as long as there is no essential change.

For example, the shape of the liquid crystal mounting part 2C can be made into a square instead of a disk shape, and in this case, a groove into which the roller 2b is inserted can be provided inside so that the liquid crystal mounting part rotates on the optical axis. In addition, the angle and position of each reflecting mirror may also be determined by the joining relationship between the illumination unit, image installation unit, and projection lens installation unit (for example, the joining relationship of a combination structure in a vertical line in which the optical axis advances without refraction, etc.). In some cases, an image installation unit and a projection lens installation unit are attached to the base plate.

<Effects of the Invention> As described above, the present invention has been specifically explained along with the examples.
Each component of the projection device is a lighting unit.

The liquid crystal display multi-projection of the present invention is formed into units such as an image installation unit and a projection lens installation unit, and is attached to a base plate, and at this time, the image installation unit incorporates a mechanism for adjusting the torsion of the transmitted screen. According to the device, not only can the entire device be miniaturized, but also many projection surfaces can be easily and precisely aligned on the projection screen, which has the effect of making it possible to realize a larger liquid crystal display. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a liquid crystal display multi-projection device according to a specific embodiment of the present invention, and FIG. 2 is a diagram showing another embodiment of the present invention. A... Projection device, B... Base plate, 1... Lighting unit, 2... Image installation unit, 3... Projection lens installation unit.

Claims (1)

[Claims] A lighting unit having a built-in light source and emitting illumination light, and a liquid crystal mounting part having a structure in which a liquid crystal display that forms a transmitted image is attached and the mounting twist can be adjusted around the optical axis without tampering with the liquid crystal display itself. an image installation unit in which the transmitted image is illuminated with the illumination light; and a projection lens is installed, and the transmitted image of the liquid crystal display irradiated with the illumination light is enlarged onto a projection screen using the projection lens. a projection device comprising a projection lens installation unit configured to be able to adjust the vertical position of the entire projection lens within the depth of focus of the projection lens to adjust the size of the projected image when projected; A liquid crystal display multi-projection device comprising: a base plate having a structure that allows adjustment between the projection devices.