JPH05103334A - Device for adjusting convergence of oil film controlling and projecting device - Google Patents

Abstract

PURPOSE:To provide a device for adjusting convergence of oil film controlling and projecting device constituted in such a way that the valve shifting angle of a 3-tube type oil film controlling and projecting device can be freely changed from the outside even after the device is installed and adjusted. CONSTITUTION:Of three fixed plates 11a, 11b, and 11c fitted with projecting devices, the left and right plates 11a and 11c are supported by a main body 13 so that the plates 11a and 11c can be rotated by a 1ittle amount and are respectively provided with pins 14 and 15. The central plate 11b is also similarly supported by the main body 13 and a gear 17 which is integrally united with an adjusting section 19 provided outside the main body 13 is rotatably fitted to the plate 11b. One ends of two slide levers 20 and 21 are respectively engaged with pins 14 and 15 and long hole sections 20a and 21a in which shafts 21 and 23 fixed to the central plate 11b are put and sections 20b and 21b engaged with the gear 17 are respectively provided on the other ends of the levers 20 and 21. When the gear 17 is rotated by means of the adjusting section 19, the valve shifting angle can be freely changed from the outside even after the main body is installed and adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a convergence adjusting device for an oil film control projection device used as a large image display device.

[0002]

2. Description of the Related Art In recent years, in a large-screen image display device using a light source such as xenon, a method of projecting an image by controlling an oil film has come to be used for an event or the like. Although there are one to three oil film valves, a three-tube type is used to obtain brightness on a large screen. In recent years, an integrated three-tube valve has also been devised.

An outline of a typical structure (one-tube valve) of the above-described oil film control projection device will be described below with reference to FIG. Reference numeral 1 is a light source, and 2 is a color filter that transmits only the necessary RGB colors (the three-tube type has R, G, and B, respectively).
With a filter for). Reference numeral 3 denotes an input side rod-shaped grating that transmits only the light component in the vertical (or horizontal) direction. Reference numeral 4 denotes an output-side rod-shaped grating, which serves as a light component in a vertical (or horizontal) direction and transmits or blocks light corresponding to a light component transmitted through the input-side rod-shaped grating 3. A Schlieren lens 5 has a function of forming an image on the input side rod-shaped grating 3 and the output side rod-shaped grating 4 so as to be optically common to each other. Reference numeral 6 denotes an oil film disk, which is red on the oil film surface by an electron beam emitted from an electron gun 7.
Draw each blue and green diffraction grating. A projection lens 8 includes a schlieren lens 5 and projects an image on a screen (not shown). Reference numeral 9 denotes oil, which forms a smooth oil film surface by rotating the surface of the oil film disk 6 partially immersed in the oil sump. FIG. 3 is an exploded perspective view of the valve portion of FIG. Further, FIG. 4 shows a structure of a three-tube structure in which three colors are combined on the screen surface with a constant tilt angle. FIG. 4 (a) is for projection at a short distance, and in the case of projecting from a considerable distance in a large theater, convergence adjustment is performed using a valve having a tilt angle in FIG. 4 (b).

[0004]

As described above, the conventional oil film control projection device has various types of devices depending on the installation location (FIG. 4 (a)).
(B)) is required, and once set, it is impossible to mechanically adjust the convergence even if the projection lens is replaced and the size of the image is changed.

In view of the above problems, the present invention aims to provide an oil film control projection device which can adjust the convergence by changing the valve tilt angle even after the installation adjustment.

[0006]

SUMMARY OF THE INVENTION A convergence adjusting device for an oil film control projection device according to the present invention includes three light sources which are as close to point light sources as possible and light emitted from the three light sources as RG.
Three oil film valve systems consisting of a filter for color separation into B, an input / output rod grating, an oil film disk for writing a diffraction grating by an electron gun, oil, an oil sump, etc., and the three oil film valve systems are each fixed and the focal length is variable. Possible projection lens, first, second, and third fixing plates that respectively support the three oil film valve systems, and both sides of which can be rotated by a small amount around one of them, and the three fixing plates. A rotating body that is rotatably attached to a second fixing plate located in the center of the second fixing plate by forming a gear around a point, and is manually rotatable from the outside of the main body; One of which meshes with the gear part is attached to the first and third fixing plates, slides by rotation of the gear part, and rotates the first and third fixing plates in opposite directions according to the slide. Sly It characterized the structure consisting of a lever.

[0007]

According to the convergence adjusting device of the oil film control projection device of the present invention, since the valve tilt angle can be freely changed from the outside even after the installation adjustment, the size of the screen screen and the projection distance after setting the projection lens are set by the zoom system. When changing the valve, first, the valve tilt angle can be roughly changed simultaneously on the left and right to adjust the convergence, and as a result, the mechanical tilt angle of the valve can be easily adjusted.

[0008]

EXAMPLE An example of the present invention will be described below (see FIGS.
This will be described using 4). FIG. 1 shows the configuration of a convergence adjusting device of an oil film control projection device according to an embodiment of the present invention.
Reference numeral 1 is a light source group similar to that described above, and 10 is a light valve body shown in detail in FIGS.
One is attached to each of a, 11b, and 11c. Three
The left and right fixing plates 11a and 11c of the one fixing plate are supported by the main body 13 (not shown) so as to be rotatable by a small amount around the fulcrum 12, and pins 14 and 15 are attached to one of them. Similarly, the central fixing plate 11b is supported by the main body 13 substantially in parallel with the fixing plates 11a and 11c. A support shaft 16 is provided on the fixed plate 11b, and a gear 17 is attached to the fixed plate 11b so as to be rotatable. A rotating shaft 18 is connected to the gear 17, and an adjusting unit 19 is integrally provided via the rotating shaft 18. Reference numerals 20 and 21 denote slide levers, one end of which is engaged with the pins 14 and 15 and the other end of which is fitted with the shafts 22 and 23 fixed to the fixing plate 11b.
0a, 21a, and the meshing part 20b, 2 with the gear 17
1b meshes with each other.

The operation of the convergence adjusting device of the oil film control projection device configured as described above will be described. When the adjusting portion 19 is rotated from the outside, the gear 17 is rotated and the slide levers 20 and 21 slide in opposite directions, respectively, and as a result, the fixed plates 11a and 11c simultaneously rotate in a reverse direction about the fulcrum 12 by a small amount. Therefore, the left and right lenses have the same tilt angle. When shortening the focal point, the tilt angle may be made large as shown in FIG. 4 (a), and at the long focal point it may be made small as shown in FIG. 4 (b) to zoom the lens to bring it into focus.

[0010]

As described above, according to the convergence adjusting device of the oil film control projection device of the present invention, the valve tilt angle can be freely changed from the outside even after the installation adjustment, so that the projection lens is zoomed and the screen screen after setting is set. Even when changing the size and the projection distance, it is possible to roughly adjust the tilt angle of the valve at the same time to the left and right to adjust the convergence, and as a result, mechanically adjust the tilt angle of the valve into a compact and inexpensive device. Can be done easily.

[Brief description of drawings]

FIG. 1 is a schematic plan view (a) and a schematic front view (b) of a convergence adjusting device of an oil film control projection device according to an embodiment of the present invention.

FIG. 2 is a typical structure of the oil film control projection device (one-tube type).
Schematic side view showing the outline of

FIG. 3 is an exploded perspective view of the oil film control projection device.

FIG. 4 is a plan view showing large (a) and small (b) tilt angles of the oil film control projection apparatus.

[Explanation of symbols]

 11a 11b 11c Fixed plate 17 Gear wheel 20 21 Slide lever

Claims (1)

[Claims] 1. A light source that is as close as possible to three point light sources, three oil film valve systems that are arranged in a substantially coplanar manner corresponding to each light source, and are fixed to the three oil film valve systems, respectively. A projection lens with a variable focal length,
The first, second, and third fixing plates that support the three oil film valve systems and are configured to be able to rotate a small amount about one of them are located at the center of the three fixing plates. A rotating body that is rotatably attached to the second fixed plate by forming a gear partially around one point and that is manually rotatable from the outside of the main body, and the gear portion of the rotating body. , One of which is attached to the first and third fixing plates, slides by rotation of the gear portion, and rotates the first and third fixing plates in opposite directions according to the slide. Convergence adjusting device for oil film control projection device consisting of slide lever.