JPH1039269A - Liquid crystal projector and its projection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust the angle of a projection video, etc., with a simple constitution and also to realize a simple focusing, etc., by forming a liquid crystal projector of a first structure body incorporating an optical system and a second structure body incorporating an electric control system and respectively and independently moving the first and the second structure bodies. SOLUTION: The first structure body 4 incorporating the optical system 3 is separated from the second structure body 7 incorporating the electric control system including a heavy power source 6 and a control system member 5. The structure bodies 4 and 7 are connected with each other through a movable arm part 30, so that the body 4 can relatively move back and forth or up and down with respect to the body 7. Since the body 4 is constituted to be rotatable within the range of an adequate angle with respect to the part 30, the height of the projection video, a projection angle and inclination can be easily adjusted. Functions for simple zooming and focusing can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal projector that irradiates an image on a liquid crystal panel with an appropriate lamp and projects the image at a predetermined magnification with a predetermined optical lens.

[0002]

2. Description of the Related Art Conventionally, when adjusting a projection image in a liquid crystal projector, the adjustment of the projection angle is performed, for example, as shown in FIG.
The projection angle of the image projected on the screen is adjusted (tilted) by extending and contracting the foot 16 provided at the front part of the lower part of the main body of the main body 2 and, as shown in FIG. The inclination of the projected image is adjusted by appropriately adjusting one or both of the two feet 16 provided in the front part of the lower part of the main body 22 and substantially in parallel with the front part of the main body of the liquid crystal projector 22. It was common.

[0003] Specifically, as an angle adjustment method using the foot 16, first, the main body of the liquid crystal projector set 22 is lifted by hand, and the screw 17 itself constituting the foot 16 is turned. This is a method of moving the liquid crystal projector set body 22 up and down while moving the liquid crystal projector set 22 to adjust the projected image to an appropriate position on the screen. Then, there is a method in which the liquid crystal projector set main body 22 is moved up and down to adjust the projected image to an appropriate position on the screen.

However, in this method, since the weight of the liquid crystal projector set main body 22 is basically applied to the feet 16, the more the weight of the liquid crystal projector set main body 22 increases, the more the liquid crystal projector set becomes. It is difficult to raise and rotate the set body 22. Even if the rotating plate 18 is rotated, the load applied to the rotating plate 18 is increased, and there is a problem that the rotating plate 18 is damaged. Accordingly, it has been demanded that the weight and weight of the liquid crystal projector set be improved so that the projection position and the projection angle can be easily adjusted.

[0005] To improve such a conventional method of adjusting the projection angle and projection position of an image, for example, Japanese Patent Application Laid-Open No. H6-175099 or Japanese Utility Model Application Laid-Open No. H6-479.
No. 22 has been proposed. Such a proposal is shown in FIG.
As shown in the figure, a cylindrical part 19 containing an optical system part such as a projection lens and a reflecting mirror and another part, that is, a support base part 20 containing a power supply and a control system are integrally formed. By rotating the cylindrical portion 19 including the reference numeral 21 around the longitudinal axis O of the cylindrical portion 19 as shown by arrow D, the angle of the projected image is adjusted, and the cylindrical portion 19 is rotated on the support base 20. By rotating the shape portion 19 as shown by the arrow E, the inclination of the projected image is adjusted.

With this configuration, the operation of lifting the liquid crystal projector set main body 22 by hand and adjusting the screw itself of the foot 16 is not required as in the above-described conventional example. Load 2 with the shaped part 19
Since it is divided, there is no need to rotate the disk 18 fitted to the screw 17 with a high torque as in the above-described conventional example.

However, even in such a method, it is necessary to simultaneously adjust the height or angle of the projected image on the screen, and since there is no focus function or zoom function, fine adjustment of the projected image is easy. Could not be done. In order to solve such a problem, as shown in FIG. 2A, the entire support plate 25 on which the liquid crystal projector set main body 22 is mounted is moved up and down by using an appropriate lifting / lowering means 23 to project a projected image. Although there is a method of adjusting the projection device to an appropriate position on the screen, the size of the entire projection device is too large, and it is inconvenient to move or handle the projection device.

[0008]

That is, the first problem in the above-mentioned conventional liquid crystal projector is that it is not easy to adjust the distance between projected images with respect to a screen.
That is, the conventional liquid crystal projector set main body 22 has only a partial adjustment mechanism provided in the main body, so that the set main body is lifted or the rotating disk 18 is rotated with a high torque to adjust the separation. Is required to be rotated.

Therefore, there has been a demand for a system that can more simply adjust the distance between projected images in the liquid crystal projector set body. The second problem is that the conventional liquid crystal projector set main body does not have a function of adjusting the height of the projected image, and is generally provided with a dedicated stand, that is, as shown in FIG. Since the adjustment is generally performed using the vertically movable support 25 in (A), a considerably large installation space is required, and at the same time,
It was inconvenient to move and the operability was not good.

Accordingly, an object of the present invention is to improve the above-mentioned disadvantages of the prior art, and to easily perform various adjustment operations such as the angle, height, and inclination of a projected image with a simple configuration, and to achieve a simple operation. It is a liquid crystal projector having both a focus function and a zoom function, and further provides a lightweight and portable liquid crystal projector.

[0011]

The present invention basically employs the following technical configuration in order to achieve the above object. That is, a liquid crystal display panel,
A first structure including an optical system including a lamp and a projection lens system and a second structure including an electric control system including a power supply and a control member are formed by the first structure. The liquid crystal projector is configured to be movable independently of the second structure.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a liquid crystal projector according to the present invention, a first structure incorporating an optical system and a second structure incorporating an electric control system including a heavy power supply and a control system member. And the first structure and the second structure are separated from each other.
Are connected to each other via a movable arm,
Thereby, the first structure is configured to be capable of moving back and forth or up and down relative to the second structure, and further, the first structure is Since it is configured to be rotatable within an appropriate angle range with respect to the arm, not only the adjustment of the height of the projection image but also the adjustment of the projection angle, the adjustment of the inclination of the projection image, etc. can be easily performed. It is possible to do.

Further, in the liquid crystal projector according to the present invention, it is possible to have a simple zoom mechanism or a focus mechanism capable of finely adjusting the projected image.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of a liquid crystal projector according to the present invention will be described below in detail with reference to the drawings. That is, FIGS. 1, 3 and 4 show one embodiment of the liquid crystal projector according to the present invention.
FIG. 3 is a view schematically showing a configuration in a specific example, in which a first structure 4 incorporating a liquid crystal display panel 1, a lamp 2, an optical system 3 including a projection lens system, a power supply 6, and a main board are shown. And a second structure 7 incorporating an electric control system including a control member 5 and the like.
1 shows a liquid crystal projector 100 configured such that the structure 4 can be moved independently of the second structure 7.

That is, as a characteristic of the liquid crystal projector 100 of the present invention, the first structure 4
The first structure 4 and the second structure 7 are connected to each other via a movable arm 30, and are configured separately from the second structure 7. Thereby, the first structure 4 is configured to be capable of moving back and forth or up and down relative to the second structure 7.

The configuration of the arms 30 according to the present invention is not particularly limited, but is, for example, pivotally connected to each other via a pivotable joint 14 as shown in FIG. It is also possible to use a hinge structure 8 composed of a plurality of supporting rods 81 and 82 and the like, and although not shown, a single flexible rod-like body or panda that can be expanded or contracted or bent. It is also possible to use an elastic structure having a graph configuration.

In the embodiment of the liquid crystal projector 100 according to the present invention shown in FIG. 1, the first structure 4 and the second structure 7 are mutually connected via a bent hinge structure 8. The first structure 4 is connected so as to be able to move and move independently of the heavy second structure 7. That is, in the above specific example, the pivotable joint 14 in the hinge structure 8 is used.
Alternatively, at the lower end of the hinge structure 8, the second structure 7
The height of the projection image projected from the first structure 4 on the screen and the projection angle can be appropriately and easily adjusted by arbitrarily adjusting the angle of the connecting portion 15 which is connected to the first structure 4 so as to be freely rotatable. Becomes possible.

Furthermore, the liquid crystal projector 10 according to the present invention
In a specific example of “0”, it is desirable that the lower end of the arm portion 30 is slidably joined to the second structure 7. As an example for this purpose, as shown in FIG. 1, the connection portion 15 at the lower end of the hinge structure 8 as an example of the arm portion 30 is formed by a groove or a rail portion provided in the second structure 7. 13 and the groove or rail 13
It is configured to be able to freely move back and forth along the.

According to this configuration, a zoom function or a focus function for the screen of the projected image in the liquid crystal projector is added, so that it is possible to easily adjust the distance between the projected images or finely adjust the projected image. .
On the other hand, the first structure 4 is gripped by the upper end of the arm 30, and the first structure 4 pivots about the optical axis P of the first structure 4. It is desirable that the arm 30 grip the arm 30 as much as possible.

Specifically, for example, the joint between the first structure 4 and the hinge structure 8 is an annular body provided at the tip of the hinge structure 81 as shown in FIG. 31, the cylindrical portion 10 of the first structure 4 is fitted so as to be rotatable, and at the same time, the first structure 4
Is provided with an arc-shaped projection 9 for rotation control on a part of the cylindrical part 10, and the arc-shaped projection 9 engages with a stopper 11 provided on a part of the annular body 31. Thus, the turning range of the cylindrical portion 10 of the first structure 4 is restricted.

With this configuration, the inclination of the projected image can be easily adjusted. Further, in the liquid crystal projector 100 according to the present invention, as shown in FIG. 4, an image signal for driving the liquid crystal panel output from the control system of the second structure 7 is provided inside the arm 30. It is desirable that a wiring portion 12 for supplying various signals or power including power for driving a lamp or the like to the first structure 4 be inserted.

The liquid crystal projector 100 according to the present invention
In this case, it is desirable that the second structure 7 be provided with a space 32 for accommodating the first structure 4. When projecting a predetermined image using the liquid crystal projector 100 according to the present invention, the separation of the image 24 projected on the screen is adjusted. First, the projection angle Θ and the projection image In the specific example of FIG. 1, the adjustment of the height direction y is performed in the pivotable joint portion 14 and the lower end connection portion 1.
5 is rotated by an arbitrary angle to adjust the distance, and the distance to the screen is adjusted by sliding the connection portion 15 in the groove portion or the rail portion 13 to perform the zoom function and the focus function. It is.

The inclination α of the projected image 24 on the screen
Can be adjusted by rotating the cylindrical portion 10 of the first structure 4 along the annular body 31 at an appropriate angle. Liquid crystal projector 1 of the present invention
In the specific example of 00, after the projection operation is completed, the arm 30 composed of the hinge structure 8 is contracted, and the first structure 4 is provided on the second structure 7. By storing the liquid crystal projector 100 in the space 32, the external dimensions of the liquid crystal projector 100 itself can be reduced, and the liquid crystal projector 100 can be easily carried.

The liquid crystal projector 100 according to the present invention
Since the appropriate wiring portion 12 is built in the arm portion 30, the connecting portion 15 between the arm portion 30 and the second structure 7 or the arm portion 30 and the first In the connection portion with the structure 4, it is preferable to adopt a slit-like structure in which the wiring portion can slide and move so that the wiring portion 12 is not cut.

Further, in the present invention, the telescopic turning movement of each of the arms 30 or the sliding movement of the arms 30 with respect to the second structure 7, and further, the cylindrical portion 10 of the first structure 4
The pivoting motion at the connection between the arm and the tip of the arm 30 is
It may be configured to automatically turn and slide based on a control signal from the control unit of the second structure 7 using appropriate driving means.

On the other hand, in the liquid crystal projector according to the present invention, for example, copper plating is applied to part or all of the inside of the cylindrical portion of the first structure 4 in order to prevent noise from being applied to the video signal. It is also desirable to apply
It is also desirable to cover the lamp portion 2 with a molding material provided with an appropriate opening in order to release the heat generated from the fan, or to provide an appropriate blowing means such as a fan in parallel.

Further, in order to easily replace the lamp portion, it is preferable that the lamp portion 2 is configured to be attached to and detached from the cylindrical portion 10. It is also desirable to provide an appropriate polarizing plate at the front or rear part of the liquid crystal display panel 1 and adopt a structure in which dust, dust and the like do not enter between them. Further, in the present invention, as the size of the liquid crystal display panel 1 is miniaturized, fine adjustment of the projection conditions is required, and therefore, for example, the projection condition is set in the cylindrical portion 10 of the first structure 4. Any one of the existing liquid crystal display panel 1, the lamp 2, and the optical system 3 including the projection lens system is extended over an appropriate length in a direction perpendicular to the longitudinal axis P of the cylindrical portion 10 with respect to other members. It is also desirable to adopt a configuration in which fine movement is performed so as to relatively displace.

In particular, to eliminate trapezoidal distortion of the projected image,
The lamp unit 2 and the liquid crystal display panel 1 are integrally formed, and are configured to be movable back and forth with respect to the lens unit 3 along the optical axis direction or to be movable in a direction perpendicular to the optical axis direction. Things are desirable. In the present invention, when projecting a predetermined image, a first structure 4 incorporating an optical system including a liquid crystal display panel, a lamp, and a projection lens system, and an electric control system including a power supply and a control member are provided. Built-in second
Of the liquid crystal display panel 1 projected on the screen by moving the first structure 4 separately and independently from the second structure 7. This is a projection method for a liquid crystal projector that can perform projection while freely adjusting the projection state.

[0029]

In the liquid crystal projector according to the present invention, it is possible to achieve the effect that the separation of the projected image can be more easily adjusted by using a simpler structure than in the prior art. That is, in the present invention, the first structure 4 which is a part of the main part of the liquid crystal projector is separated so as to be independently movable with respect to other parts. The angle, height, and inclination of the projected image can be easily adjusted, and simple adjustment of the zoom or focus can be performed, so that the projected image in the best condition can always be obtained.

Also, in the present invention, the height and angle of the projected image can be adjusted arbitrarily by using the telescopic and movable arms. It is not necessary to use a dedicated table, and it is not necessary to select a place where the projection image is projected. In addition, the size is reduced, so that it is easy to carry.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an outline of a configuration of a liquid crystal projector according to the present invention.

FIGS. 2A to 2C are diagrams illustrating an example of a conventional method of adjusting a projected image of a liquid crystal projector.

FIG. 3 is a cross-sectional view illustrating an example of a joint between an arm and a first structure in the liquid crystal projector according to the present invention.

FIG. 4 is a diagram showing an example of an arrangement of wiring portions in the liquid crystal projector according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display panel 2 ... Lamp 3 ... Lens 4 ... First structure 5 ... Control part 6 ... Power supply part 7 ... Second structure 8 ... Hinge structure 9 ... Projection part 10 ... Cylindrical part 11 ... Stopper part DESCRIPTION OF SYMBOLS 12 ... Wiring body 13 ... Groove part, rail part 14 ... Joint part 15 ... Connection part 16 ... Foot part 17 ... Screw part 18 ... Disk part 19 ... Cylindrical part 20 ... Support part 21 ... Lens part 22 ... Liquid crystal projector set Main body 23 ... Elevating means 24 ... Screen 30 ... Arm part 31 ... Ring body 32 ... Space part 100 ... Liquid crystal projector

Claims (9)

[Claims] 1. A first structure including an optical system including a liquid crystal display panel, a lamp, and a projection lens system, and a second structure including an electric control system including a power supply and a control member. A liquid crystal projector characterized in that the first structure is movable independently of the second structure. 2. The liquid crystal projector according to claim 1, wherein the first structure is configured to be separable from the second structure. 3. The first structure and the second structure are connected to each other via a movable arm, whereby the first structure is connected to the second structure. The liquid crystal projector according to claim 1, wherein the liquid crystal projector is configured to be able to move back and forth or up and down relative to the liquid crystal display. 4. The liquid crystal projector according to claim 3, wherein said arm portion is constituted by a plurality of support rods which are pivotally connected to each other via a pivotable joint. 5. The liquid crystal projector according to claim 3, wherein a lower end of the arm is slidably or pivotably connected to the second structure. 6. The first structure is gripped by an upper end of the arm, and the first structure is pivotable about an optical axis of the first structure. 4. The liquid crystal projector according to claim 3, wherein said arm is gripped by said arm. 7. A wiring portion for supplying a signal output from a control system of the second structure to the first structure is inserted into the arm. The liquid crystal projector according to claim 3, wherein 8. The liquid crystal projector according to claim 1, wherein the second structure is provided with a space for accommodating the first structure. . 9. A first structure including an optical system including a liquid crystal display panel, a lamp, and a projection lens system, and a second structure including an electric control system including a power supply and a control member. A projection state of the liquid crystal projector by adjusting the projection state of the liquid crystal projector by moving the first structure independently of the second structure. .