JP2001305651A - Projection unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection device which instantaneously form images from a projector with good accuracy and with small driving power to an objective surface. SOLUTION: The projection device 10 which has the projected light from the projector 11 reflected to a mirror 12 and forms the original image from the projector 11 to the objective surface has an inclination angle control mechanism which controls the inclination angle of the mirror 12 and a swiveling angle control mechanism which swivels the mirror 12 around the optical axis of the projected light from the projector 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector capable of forming an original image from a projector on a target surface without moving the projector.

[0002]

2. Description of the Related Art Conventionally, when an original image from a projector is formed on a target surface, the projector is directly moved,
The position of the image formed on the target surface is changed. This makes it possible to change the position of the image formed on the target surface, form an image on a new target surface existing in another direction, and form an image formed on the target surface on the target surface. It can be moved in an imaged state.

[0003]

However, when the target surface on which the original image from the projector is to be formed is large, such as a movie screen, the size of the projector is reduced in order to secure the illuminance of the target surface. The projector had to be large, and the weight of the projector was heavy. Therefore,
When the projector is moved to move the position of the image formed on the target surface, the following problem occurs. (1) If an image to be formed on the target surface is to be moved quickly with the image formed on the target surface, the projector must be moved quickly, but since the projector is heavy,
The movement of the image formed on the target surface becomes slow. (2) When automatically adjusting the position of the projector, even if the projector is to be stopped at a target position, the projector is a heavy object, and inertial force acts on the projector to make fine adjustment difficult. (3) When the position of the projector is automatically adjusted, the power for moving the projector main body increases because the projector is heavy. The present invention has been made in view of such circumstances, and has as its object to provide a projection device capable of forming an original image from a projector accurately, instantaneously, and with small power on a target surface.

[0004]

According to a first aspect of the present invention, there is provided a projection apparatus which reflects a projection light from a projector to a mirror and forms an original image from the projector on a target surface. And a turning angle control mechanism for turning the mirror around the optical axis of the light projected from the projector. Thus, the original image from the projector can be formed at any position on the target surface without moving the projector, and the image formed on the target surface can be moved while being formed on the target surface. .

A projection apparatus according to a second aspect of the present invention irradiates projection light from a plurality of projectors onto one or a plurality of target surfaces via mirrors provided for the respective projectors. In a projection apparatus that forms an original image on a target surface, the projection conditions including the tilt angle φ and the turning angle θ of each mirror, the zoom degree Z of each projector, and the optimum focus value F of each projector correspond to 1 Or, a control device that obtains an experimental image for a plurality of target surfaces in advance, stores it in a data storage unit, and reproduces an original image from each projector based on a data value of a projection condition stored in the data storage unit. It has. Thus, the projection conditions can be stored in the data storage unit, so that when an original image from each projector is formed on the target surface, it is possible to form the image without resetting the projection conditions. Here, in the projection device according to the second aspect of the present invention, the data value of the projection condition for the new target surface to be projected is not in the data storage unit, and
If the position and size of the new target surface are known,
The tilt angle φ and the turning angle θ of each mirror are calculated by interpolation from the data values for each target surface stored in the data storage unit.
Preferably, the control device is provided with arithmetic means for calculating the zoom degree Z of each projector and the optimum focus value F of each projector. This makes it possible to form an original image from each projector on the target surface without storing all the data values of the projection conditions in the data storage unit.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a perspective view of a projection device according to a first embodiment of the present invention, FIGS. 2A and 2B are a side view, a plan view, and FIG. Configuration diagram of a projection device according to a second embodiment, FIG.
(A), (B), and (C) are front views of images formed on a target surface using the same projection device, and FIGS. 5A and 5B are diagrams of an embodiment to which the same projection device is applied. It is a front view and a plan view.

As shown in FIGS. 1, 2A and 2B,
The projection device 10 according to the first embodiment of the present invention reflects the projection light from the projector 11 on the mirror 12,
This is a projection device that forms an original image from the projector 11 on a target surface (not shown). In addition, this projection device 1
Reference numeral 0 denotes a tilt angle control mechanism for controlling the tilt angle of the mirror 12, and a turning angle control mechanism for turning the mirror 12 about the optical axis of the light projected from the projector 11. The details will be described below. Projector 11
Is, for example, a liquid crystal projector, and a lens unit 1 that forms an original image from the projector 11 on a target surface.
3 is provided. The lens unit 13 includes a lens unit 13
Mounting member 14 for mounting the mirror 12 above the
Are mounted in parallel with the optical axis of the light projected from the projector 11. The mirror 12 is attached to a mounting member 14 so as to be rotatable around an iron core 15 as an example of a fixing member.
, And can reflect the projection light from the projector 11.

Here, one end of an iron core 15 for fixing the mirror 12 to the mounting member 14 has an inclination angle φ of the mirror 12.
Motor 16 which is an example of a tilt angle motor for changing the angle
Is provided. Then, on the side of the lens unit 13,
The mirror 12 is turned so that the mirror 12 can be turned around the optical axis of the projection light from the projector 11.
Is provided with a pulse motor 17 which is an example of a turning angle motor that changes the turning angle θ. The pulse motor 16 that changes the tilt angle φ of the mirror 12 operates after setting the initial value. After the operation, the tilt angle φ is adjusted by a tilt angle adjustment unit (not shown) that adjusts the tilt angle φ of the mirror 12. , The inclination angle φ of the mirror 12 is controlled. On the other hand, the pulse motor 17 that changes the turning angle θ of the mirror 12 also operates after setting the initial value, and after the operation, the turning angle θ is adjusted by a turning angle adjustment unit (not shown) that adjusts the turning angle θ of the mirror 12. The mirror 12 is turned around the optical axis of the light projected from the projector 11. Accordingly, the tilt angle control mechanism and the turning angle control mechanism are respectively constituted by the pulse motor 16 and the tilt angle adjusting unit, and the pulse motor 17 and the turning angle adjusting unit.

The tilt angle adjusting section of the mirror 12 and the turning angle adjusting section of the mirror 12 are each configured as a program in a control computer (not shown). Here, the control computer includes a display,
A keyboard and mouse are included. In this embodiment, the motors that change the tilt angle φ of the mirror 12 and the turning angle θ of the mirror 12 are pulse motors 16 and
17, the tilt angle φ and the turning angle θ are changed depending on the number of revolutions (that is, the number of pulses) of the pulse motors 16 and 17, respectively. It is also possible to convert the rotation angle displacement into a digital quantity and change the inclination angle φ and the turning angle θ, respectively.

Further, the lens unit 13 is provided with a zoom function for adjusting the size of the formed image when the original image from the projector 11 is formed on the target surface. Can be adjusted. Further, the lens unit 13 is provided with a focus function so that the optimum focus value F of the projector 11 can be obtained after adjusting the zoom degree Z of the projector 11. Thereby, the size of the image formed on the target surface can be easily adjusted. Also, the projector 11 is provided with a hanger portion 18 having such strength that the projector 11 does not fall down even when the projector 11 is mounted on a wall or ceiling so that the projector 11 can be easily mounted on a wall or ceiling. is there. Thereby, the projector 11 can be easily mounted on a wall, a ceiling, or the like.

Therefore, it is possible to reflect the projection light from the projector 11 to the mirror 12 without moving the projector 11, and to form an original image from the projector 11 on the target surface. For this reason, the projection device 10
Does not need to be moved manually, so that the original image from the projector 11 can be instantaneously and accurately formed with small power on the target surface.

Next, a projection apparatus 20 according to a second embodiment of the present invention will be described with reference to FIG. 3, but members other than the changed parts will be described in the first embodiment of the present invention. Are the same as those used in the projection device 10 according to the above, the same members are denoted by the same reference numerals and description thereof will be omitted. Projection device 20 according to a second embodiment of the present invention
Irradiates projection light from a plurality of (four in this embodiment) projectors 11 onto one or more (eg, 2 to 6) target surfaces (not shown) via mirrors 12 provided respectively. Further, the projector is a projection device that forms an original image from each projector 11 on a target surface. The projection device 20 includes a control device 23 having a control computer 21 and an image computer 22. The control device 23 is connected to each projector 11 via a multi-matrix box 24. The details will be described below.

The multi-matrix box 24 is a switching device for sending a signal from the control device 23 to each projector 11. In the control computer 21,
As a program, the tilt angle adjusting unit 25 of each mirror 12
And a turning angle adjustment unit 26 of each mirror 12 are configured,
Moreover, the first calculating means 27 and the first data storage unit 28
Is provided. Therefore, the first data storage unit 28
Can store the tilt angle φ and the turning angle θ of each mirror 12. On the other hand, in the image computer 22, a zoom degree adjustment unit 29 of the projector 11 and a focus value adjustment unit 30 of the projector 11 are configured as programs.
D31, a second calculating means 32, and a second data storage unit 33 are provided. Therefore, the second data storage unit 3
Reference numeral 3 can store the zoom degree Z of each projector 11 and the optimum focus value F of each projector 11. The control computer 21 and the image computer 22 each include a display, a keyboard, and a mouse (not shown).

With this configuration, the control device 23
, The tilt angle φ and the turning angle θ of each mirror 12,
First and second data storage units that determine in advance projection conditions including a zoom degree Z of each projector 11 and an optimum focus value F of each projector 11 on one or more corresponding target surfaces. 28 and 33. Thereby, the first and second data storage units 2
Based on the data values of the projection conditions stored in 8, 33,
The original image is sent from the image HD31 to each projector 11, and the original image can be reproduced from the projector 11 on the target surface. Therefore, each projector 11
The data values of the projection conditions stored in the first and second data storage units 28 and 33 are used again without inputting the data values of the projection conditions again for the target surface on which the original image from Thus, the reproduction of the original image from each projector 11 can be performed instantaneously.

The first and second operation means 27 and 32
Indicates that the data values of the projection conditions for a new target plane (not shown) to be projected are stored in the first and second data storage units 2.
8 and 33, and can be used when the position and size of a new target surface are known. In this case, the first and second calculation means 27 and 32 are used to interpolate each mirror 11 from the data values for each target surface stored in the first and second data storage units 28 and 33 by interpolation. The tilt angle φ and the turning angle θ, the zoom degree Z of each projector 11, and the optimum focus value F of each projector 11 can be obtained. Thus, the data values of the projection conditions for the new target surface to be projected can be easily obtained by calculating the data values of the projectors 11 without having to obtain all the data by experiments.

Next, regarding the operation method of the projection device 20 according to the second embodiment of the present invention, the data values of the projection conditions for the target surface are stored in the (1) first and second data storage units 2.
The case where the data is stored in the data storage units 8 and 33 and the case where (2) the data value of the projection condition for the new target surface is not stored in the first and second data storage units 28 and 33 will be described. (1) When the data values of the projection conditions for the target surface are stored in the first and second data storage units 28 and 33. First, the tilt angle φ and the turning angle θ of each mirror 12 and the projector Of zoom Z
And the projection condition (initial value) including the optimum focus value F of each projector are input (set). As a result, the pulse motor 16 that changes the tilt angle φ of each mirror 12 operates, and after the operation, the tilt angle φ is adjusted by the tilt angle adjusting unit 25 that adjusts the tilt angle φ of each mirror 12, and each mirror 12 is tilted. I do. Subsequently, after adjusting the tilt angle φ, each pulse motor 17 that changes the turning angle θ of each mirror 12 operates, and after the turning, the turning angle θ is adjusted by the turning angle adjustment unit 26 that adjusts the turning angle θ of each mirror 12. It is adjusted and each mirror 12 turns.

After the adjustment of the tilt angle φ and the turning angle θ is completed, each of the projectors 11 is
Is adjusted by the focus value adjustment unit 30 so that the optimum focus value F of each projector 11 is obtained. The tilt angle φ and the turning angle θ of each mirror 12 and the zoom degree Z of each projector 11
And the optimal focus value F of each projector 11, and then further fine-tune (for example, re-input of data value)
To obtain the data value of the projection condition. The data value of the projection condition is obtained by performing an experiment on the target surface in advance by the above method, and stored in the first and second data storage units 28 and 33, respectively.

Therefore, as shown in FIGS. 4A, 4B, and 4C, for example, images 34a to 34d arranged vertically and horizontally and images 35a to 35d arranged horizontally.
d, images 36a to 36d having different sizes are experimentally determined in advance to determine the projection conditions, and the first and second data storage units 28, 3
The projection conditions (tilt angle φ, turning angle θ, zoom degree Z,
By storing the data value of the optimum focus value F), the position of the image formed on the target surface from each projector 11 via the mirror 12 can be variously changed, that is, FIG.
From one image group of (A), (B), and (C),
(A), (B), and (C) can be changed to any one of the other image groups to instantaneously form an image on the target surface.
In addition, although the case where four projectors 11 are used is shown here, 1 to 3 projectors are used depending on the use purpose.
Alternatively, it is also possible to use five or more devices.

(2) When the data value of the projection condition for the new target surface is not in the first and second data storage units 28 and 33, if the position and size of the new target surface are known, the first The projection conditions can be obtained from the data values for each target surface stored in the second data storage units 28 and 33. Therefore, for example, as shown in FIG. 4B, the data values of the target planes of the images 35a and 35d at both ends are stored in the first and second data storage units 28 and 33, and the two images 3 in the central part are stored.
When the data values of the target surfaces 5b and 35c are not stored in the first and second data storage units 28 and 33, the data values of the target surfaces stored in the first and second data storage units 28 and 33 From the data values, the inclination angle φ and the turning angle θ of the mirror 12, the zoom degree Z of the projector 11,
The optimum focus value F of the projector 11 can be obtained by the first and second calculation means 27 and 32.

Here, the above-mentioned interpolation method will be described. First, the projection condition of an image to be formed on a target surface is represented by f (X).
, The discrete value of X, X ₀ ,
X _1, X _2, ···, against X _n, a value f _0, f _1, f ₂ of the function f (X), ···, the f _n can be determined, respectively. At this time, any value X on the function f (X)
It is possible to obtain the value of f (X) with respect to. Here, X _{n corresponds} to the tilt angle φ _n of the mirror 12, the turning angle θ _n , the zoom degree Z _{n of} the projector 11, and the optimum focus value F _n of the projector 11, respectively. Thereby, the first and second data storage units 28 and 33
By using the data value of the projection condition in
Since (X) can be obtained, the data value of the projection condition of the image to be projected can be obtained on the function f (X). Therefore, even if the data value of the projection condition of the image to be projected is not stored in the first and second data storage units 28 and 33, the image can be easily formed on the target surface. .

Since the control device 23 is provided with the first and second calculation means 27 and 32, the projection device 20
Can be operated as follows. First, based on the data values stored in the first and second data storage units 28 and 33, the data values of the projection conditions are stored in the image by using the first and second calculation means 27 and 32. Not points
It can be connected as a line. As a result, even if the target surface moves, all points on the trajectory of the image are tested, and the trajectory of the moving target surface is automatically followed without taking the data value of the projection condition, and the image is formed. It is possible to do.

In the embodiment of the present invention, when the original image from the projector 11 is formed on the target surface, the range of image formation is limited by conditions such as the installation location of the projector 11. Therefore, it is necessary to clarify in advance how far the image needs to be moved. When the original image from the projector 11 is formed on the target surface, after setting the projector 11 at a predetermined location, the moving range of the moving object serving as the target surface of the image is predicted in advance, and the moving range in both directions of the moving range is estimated. The inclination angle φ is set substantially starting from the center (0 degree). Further, in the turning range in which the light is turned around the optical axis of the light projected from the projector 11, the turning angle θ is defined as the starting point (0 degree) when the reflection surface of the mirror 12 is substantially parallel to the ground.
Is basically set. Accordingly, it is possible to detect the amount of change in ± of the inclination angle φ and the turning angle θ. Note that this method of setting the starting point is one method. When an original image from the projector 11 is formed on a target surface, an experiment is performed in advance to check the image forming effect and the like, and then the adjustment or re-adjustment is freely performed. It is also possible to set.

Next, the upper limit value and the lower limit value of the tilt angle φ and the turning angle θ of the mirror 12 will be described. The inclination angle φ of the mirror 12 is obtained by estimating the image forming range of the target surface in advance, and setting the starting point (0 degree) substantially at the center of both sides of the moving range around the projected image. Any number of times is possible as long as it is within the range of the angle at which the image is formed on the target surface without breaking. The upper limit value and the lower limit value of the tilt angle φ vary depending on the distance between the lens unit 13 and the mirror 12 provided above the lens unit 13 and the size of the mirror 12, but −180 degrees < It can be tilted in the range of φ <180 degrees. The turning angle θ of the mirror 12 can be turned in a range of −180 degrees <θ <180 degrees in a turning range of turning around the optical axis of the light projected from the projector 11.

In the above embodiment, the case where a liquid crystal projector is used as the projector 11 has been described. However, a device for forming an original image from the projector on a target surface, such as an overhead projector, a lighting device, or the like It is also possible to use. The mirror 12 is mounted via an iron core, which is an example of a fixing member. However, any mirror that can fix the mirror 12 to a mounting portion such as a mounting member and can change the inclination angle φ of the mirror can be used. Others may be used. In the above embodiment, the pulse motor 16 for controlling the tilt angle φ of the mirror 12 and the pulse motor 17 for controlling the turning angle θ of the mirror 12 are mounted outside the iron core 15 and the projector 11, respectively. . However, taking the appearance into consideration, the inside of the fixing member 15 and the projector 11
It is also possible to arrange each inside. Furthermore, in the above-described embodiment, the mirror 12 is mounted above the lens unit 13 of the projector 11 via the mounting member 14 and the iron core 15. It can also be installed on the ground or the like, or installed on the wall of a building.

As described above, the present invention has been described with reference to the first and second embodiments. However, the present invention is not limited to the configuration described in the above embodiment, and claims And other embodiments and modifications that can be considered within the scope of the matters described in the range. For example,
In the above embodiment, it is also possible to irradiate only the projection light (light) from the projector as the image to be formed on the target surface.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the projection apparatus 20 according to the present invention is applied and implemented will be described. As shown in FIGS. 5A and 5B, here, a total of six projectors 11 are arranged, one each on each surface around the inside of the hexagonal hole 40. In the center of the hall 40, a stage 45 played by an actor 43 and a special glass 41, which is an example of a target surface, are arranged substantially perpendicular to the stage 45, and a spectator space 42 is provided around the stage. Have been. Thus, the audience 44 can perform the actor 43 on the stage 45 or the special glass 4
1 can be appreciated. here,
The special glass 41 is a glass in which liquid crystal is provided between glass, and becomes frosted glass when a voltage is applied,
If no voltage is applied, it becomes transparent glass.

Thus, when the special glass 41 is made transparent, the actor 43 moving on the stage 45 (for example, the upper surface of the stage 45 is set as a target surface), the first of the control device 23,
Based on the data values in the second data storage units 28 and 33,
The projection light (light) from the projector 11 is emitted. On the other hand, when the data value of the projection condition for the target surface to be projected is not in the first and second data storage units 28 and 33, the object stored in the first and second data storage units 28 and 33 The projection condition is obtained from the data value for each surface by interpolation, and the target surface can be irradiated with light. Next, when the special glass 41 is frosted glass, the original image from each projector 11 is based on the data values of the projection conditions for the frosted glass obtained by experiments in advance in the first and second data storage units 28 and 33. Can be reproduced. Therefore, the original image from each projector 11 can be instantaneously formed on the special glass 41. The above-described method can be repeatedly executed instantaneously.

[0028]

According to the first aspect of the present invention, the original image from the projector can be formed at any position on the target surface without moving the projector, and the image formed on the target surface is converted to the target surface. It is possible to move in a state where an image is formed. Therefore, the original image from the projector can be formed on the target surface accurately, instantly, with small power, and with good workability. In the projection device according to the second and third aspects, since the projection condition can be stored in the data storage unit, when the original image from the projector is formed on the target surface, the image is formed without setting the projection condition again. Becomes possible. Therefore, it is possible to instantly form an original image from the projector on the position of the target surface. In particular, in the projection device according to the third aspect, it is possible to form an original image from the projector on the target surface without storing all the data values of the projection conditions in the data storage unit. Therefore, even when the data values of the projection conditions of the image formed on the target surface are known at only a few points, it is possible to obtain the data values of the projection conditions by instantaneous arithmetic processing. Thereby, since the original image from the projector can be formed on the target surface without performing all the data values of many projection conditions in advance, the workability is very good.

[Brief description of the drawings]

FIG. 1 is a perspective view of a projection device according to a first embodiment of the present invention.

FIGS. 2A and 2B are a side view and a plan view, respectively, of the projector.

FIG. 3 is a configuration diagram of a projection device according to a second embodiment of the present invention.

FIGS. 4A, 4B, and 4C are front views of images formed on a target surface using the projection device.

FIGS. 5A and 5B are a front view and a plan view of an embodiment to which the projection apparatus is applied, respectively.

[Explanation of symbols]

10: Projection device, 11: Projector, 12: Mirror, 13: Lens portion, 14: Mounting member, 15: Iron core (fixing member), 16: Pulse motor, 17: Pulse motor, 18: Hanger portion, 20: Projection device , 21: control computer, 22: video computer, 23: control device, 24: multi-matrix box, 25: mirror tilt angle adjusting unit, 26: mirror turning angle adjusting unit,
27: first calculation means, 28: first data storage unit, 2
9: zoom degree adjustment unit, 30: focus value adjustment unit, 3
1: image HD, 32: second calculation means, 33: second data storage unit, 34a to 34d, 35a to 35d, 36a
36d: Image, 40: Hall, 41: Special glass (target surface), 42: Audience space, 43: Actor, 44: Audience, 45: Stage

Claims (3)

[Claims] 1. A projection device that reflects projection light from a projector to a mirror and forms an original image from the projector on a target surface, wherein the tilt angle control mechanism controls a tilt angle of the mirror; A turning angle control mechanism for turning a mirror around the optical axis of the light projected from the projector. 2. Projection light from a plurality of projectors,
In a projection apparatus that irradiates one or a plurality of target surfaces via respective provided mirrors and forms an original image from each of the projectors on the target surface, a tilt angle φ and a turning angle θ of each of the mirrors And a projection condition including a zoom degree Z of each of the projectors and an optimum focus value F of each of the projectors are obtained by performing an experiment on the corresponding one or more target surfaces in advance, and stored in the data storage unit. In addition, the projection device further includes a control device that reproduces an original image from each of the projectors based on the data value of the projection condition stored in the data storage unit. 3. The projection apparatus according to claim 2, wherein the data value of the projection condition for the new target plane to be projected is not in the data storage unit, and furthermore, the position and size of the new target plane. When it is known, the tilt angle φ and the turning angle θ of each of the mirrors, the zoom degree Z of each of the projectors, and the interpolation method from the data value for each target surface stored in the data storage unit, A projection device, wherein a calculation means for obtaining an optimum focus value F of each of the projectors is provided in the control device.