JP2004038149A - Optical path adjusting device for projector and rear projector equipped with same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical path adjusting device for projector which can provide an easy-to-adjust, accurate optical path adjusting mechanism, and to provide a rear projector equipped with the same. <P>SOLUTION: The designing of the optical path adjusting device for projector is completed by designing a plurality of platforms and design in which one degree of freedom is controlled by using the respective platforms is employed instead of conventional design in which a plurality of degrees of freedom are controlled by a single platform. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical path adjustment device for a projector applied to an optical path adjustment in a kind of rear projector, and more particularly, to an optical path adjustment device for a projector that adopts a multi-platform design and is easy to adjust.
[0002]
[Prior art]
Usually, when we report at a meeting, we explain and show the data using a projector facility. Projectors are divided into two types, optical projectors and liquid crystal projectors, depending on the needs of the user.The main difference is that optical projectors are usually used for expressing static data, and can be used only by combining slides. It can be connected to a notebook computer, can express the effects of various computers, and is currently the most commonly used method for reporting. Of course, projectors can be connected to multimedia and used for broadcast of conference reports as well as for leisure and entertainment.
[0003]
With the development of projector display technology, projector systems and equipment have remarkably evolved in the last few years, becoming lighter and smaller, and there are other options than high brightness LCD or DLP projectors and CRT type projectors. All of the first projectors use the light emission of the optical module, project the image directly on the screen, consider the light path imaging, and maintain a certain distance between them, so the length of the projector Could not be reduced.
[0004]
To respond to the trend of volume reduction, the rear projector (rear projector) was developed.
In the projector, a reflector is additionally provided inside the projector, and the image beam of the projector is projected and imaged on the screen by the reflection of the reflector, so that the overall length of the projector can be greatly reduced. In order to image the image clearly and accurately on the screen, the reflector must be able to provide a mechanism of adjustment, and mechanically, the object has six degrees of freedom in three-dimensional space, which has three axes ( X, Y, and Z axes) and three axes of rotation. A well-known adjustment mechanism is that the projector is mounted on an adjustment platform, the reflector provides two degrees of freedom of rotation, the adjustment platform utilizes a mutual combination of three independent adjustment rods, and four other Provides adjustment of degrees of freedom. While such a structure is fairly simple, adjustment is rather difficult for the rear end operator. Because the three adjustment rods are independent of each other, once adjusting one of them, the horizontal position of the entire adjustment platform is affected, after which the other adjustment rod must be adjusted Therefore, even if there is an error in only one direction, the three adjustment rods must be adjusted in order, and the final required state cannot be obtained unless the adjustment is performed over a long time. That's why. This is very laborious for the user. In addition, since a single platform is used, it is not sufficiently stable and effective vibration absorption cannot be performed.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical path adjusting device for a projector and a rear projector having the same that solves the above-mentioned problems, which provides an interface that is easy for an operator to operate, and that can be easily and accurately adjusted. And
[0006]
The optical path adjusting device for a projector according to the present invention has a plurality of platforms combined, each platform can independently adjust different degrees of freedom, an operator can make adjustments in each direction, and can easily adjust to the best condition. . And the multi-platform design increases the stability and vibration absorption capacity of the adjustment device.
[0007]
The present invention comprises a fixed seat, a first adjustment platform, and a second adjustment platform, wherein the fixed seat is attached to the rear projector, the first and second platforms are sequentially attached to the fixed seat, and the optical crisis is applied to the second adjustment platform. It is attached. The first adjustment platform can use the height adjustment means at both ends to provide the height adjustment at both ends of the first adjustment platform, can adjust the tilt angle of the first adjustment platform using the single height adjustment means, or can use the height adjustment means at both sides. The height of the first adjustment platform with respect to the fixed seat can be adjusted by the combination of the adjustment means. The second adjustment platform can slide slightly parallel to the platform plane of the first adjustment platform, providing two vertical plane sliding degrees of freedom, and the upper reflector combined to provide two degrees of freedom, Provides six degrees of freedom adjustment.
[0008]
In addition, a design in which the second adjusting platform is composed of two sliding platforms is also possible, providing two vertical degrees of freedom, all of which are independent of each other, thereby stabilizing the adjusting device. And the convenience of the adjusting device.
[0009]
[Means for Solving the Problems]
The invention according to claim 1 is an optical path adjusting device for a projector,
Fixed seat,
A first adjusting platform, mounted on the fixed seat, and comprising two sets of altitude adjusting means, the altitude adjusting means being respectively mounted on both ends of the first adjusting platform, of which one of the altitude adjusting means is used for the first adjusting platform; The first adjusting platform, wherein the tilt angle of the platform is adjusted and the two altitude adjusting means are adjusted in synchronization to adjust the distance between the first adjusting platform and the fixed seat;
A second adjustment platform, attached to the first adjustment platform and provided for mounting the projector, and comprising a movement adjustment means, in the direction of a plane parallel to the second adjustment platform; The second adjustment platform, wherein the position of the second adjustment platform relative to the first adjustment platform is adjusted;
And a light path adjusting device for a projector.
According to a second aspect of the present invention, in the optical path adjusting device for a projector according to the first aspect, each of the altitude adjusting means includes two adjusting columns located at the same end, and the two adjusting columns are synchronously adjusted at the time of adjustment. (1) An optical path adjusting device for a projector, wherein one end of an adjusting platform is maintained in a horizontal state.
According to a third aspect of the present invention, in the optical path adjusting device for a projector according to the second aspect, the altitude adjusting means includes a screw rod coupled to the adjusting column, and can adjust the altitude of the first adjusting platform. It is an optical path adjustment device for the projector. According to a fourth aspect of the present invention, in the optical path adjusting device for a projector according to the second aspect, an elastic means is attached to the adjusting column, and the elastic means has an elasticity perpendicular to a plane of the first adjusting platform. An optical path adjusting device for a projector, characterized by maintaining stability during adjustment of an adjusting platform.
According to a fifth aspect of the present invention, in the optical path adjusting device for a projector according to the first aspect, the second adjusting platform is composed of two slide platforms.
According to a sixth aspect of the present invention, in the optical path adjusting device for a projector according to the fifth aspect, the two slide platforms provide two vertical slides, respectively.
According to a seventh aspect of the present invention, there is provided the optical path adjusting device for a projector according to the sixth aspect, wherein the two slide platforms transmit by a method of coupling a screw rod.
According to an eighth aspect of the present invention, there is provided the optical path adjusting device for a projector according to the sixth aspect, wherein the two slide platforms transmit by a method of coupling threads.
According to a ninth aspect of the present invention, in a rear projector including an optical path adjusting device, the rear projector includes an optical path adjusting device including a projector, a screen, and at least one reflecting mirror, and the optical path adjusting device of the projector projects the light. Provided for mounting the projector, the optical path adjustment device of the projector,
A fixed seat attached to the rear projector,
A first adjusting platform, mounted on the fixed seat, and comprising two sets of altitude adjusting means, the altitude adjusting means being respectively mounted on both ends of the first adjusting platform, of which one of the altitude adjusting means is used for the first adjusting platform; The first adjusting platform, wherein the tilt angle of the platform is adjusted and the two altitude adjusting means are adjusted in synchronization to adjust the distance between the first adjusting platform and the fixed seat;
A second adjustment platform, attached to the first adjustment platform and provided for mounting the projector, and comprising a movement adjustment means, in the direction of a plane parallel to the second adjustment platform; The second adjustment platform, wherein the position of the second adjustment platform relative to the first adjustment platform is adjusted;
And a rear projector provided with an optical path adjusting device.
According to a tenth aspect of the present invention, in the rear projector including the optical path adjusting device according to the ninth aspect, each of the altitude adjusting means is provided with two adjusting columns located at the same end, and the two adjusting columns are synchronously adjusted at the time of adjustment. In this case, a horizontal state of one end of the first adjustment platform is maintained, thereby providing a rear projector including an optical path adjustment device.
According to an eleventh aspect of the present invention, in the rear projector provided with the optical path adjusting device according to the tenth aspect, the altitude adjusting means includes a screw rod coupled to the adjusting column, and can adjust the altitude of the first adjusting platform. A rear projector equipped with an optical path adjusting device.
According to a twelfth aspect of the invention, in the rear projector including the optical path adjusting device according to the tenth aspect, an elastic means is attached to the adjusting column, and the elastic means has elasticity perpendicular to a plane of the first adjusting platform. A rear projector provided with an optical path adjustment device, characterized in that stability during adjustment of the first adjustment platform is maintained.
According to a thirteenth aspect of the present invention, there is provided a rear projector including the optical path adjusting device according to the ninth aspect, wherein the second adjusting platform is composed of two slide platforms. I have. According to a fourteenth aspect of the present invention, there is provided a rear projector including the optical path adjusting device according to the thirteenth aspect, wherein the two slide platforms respectively provide two vertical slides. It is a projector.
According to a fifteenth aspect of the present invention, there is provided the rear projector including the optical path adjusting device according to the fourteenth aspect, wherein the two slide platforms are driven by a screw rod coupling system. And
According to a sixteenth aspect of the present invention, there is provided a rear projector including the optical path adjusting device according to the fourteenth aspect, wherein the two slide platforms transmit by a method of coupling threads. .
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
The optical path adjusting device of the projector according to the present invention and the rear projector having the same include a fixed seat 10, a first adjusting platform 20, and a second adjusting platform 30, as shown in FIG. The first adjustment platform 20 and the second adjustment platform 30 are sequentially attached to the apparatus. And the second adjustment platform 30 is provided with a mounting groove 301 for mounting the device, which can be adjusted (not shown) with four degrees of freedom with respect to the electronic device.
[0011]
As shown in FIG. 2, the first adjusting platform 20 is mounted on the fixed seat 10 using the first altitude adjusting means 21 and the second altitude adjusting means 22 (see FIG. 3), and the first altitude adjusting means is provided. Reference numeral 21 includes a first adjustment column 212, a second adjustment column 213, and an adjustment rod 211. The adjustment rod 211 includes two screw rods 2112, 2113 and an exposed knob 2111. Gears 214 and 215 are provided on the first adjustment column 212 and the second adjustment column 213, respectively (they may be worm gears; the same applies to the gears described below), and a screw rod 2112 attached to the adjustment rod 211, 2113 are coupled to the gears 214 and 215, respectively, and are attached to the first adjustment column 212 using elastic means 216. The second altitude adjusting means 22 includes a first adjusting column 222, a second adjusting column 223, and an adjusting rod 221. The adjusting rod 221 includes two screw rods 2212, 2213 and an exposed knob 2211. The second adjustment column 223 is provided with gears 224 and 225, respectively, and the screw rods 2212 and 2213 attached to the adjustment rod 221 are coupled to the gears 224 and 225, respectively, and the second adjustment column using elastic means 226. 223.
[0012]
In addition, the first altitude adjusting means 21 and the second altitude adjusting means 22 are respectively attached to the opposite ends of the first adjusting platform 20 (see FIG. 3), whereby the knob 2111 of the first altitude adjusting means 21 is turned. , The adjustment rod 211 is driven and rotated, whereby the gears 214 and 215 connected to the screw rods 2112 and 2113 are rotated. The gears 214, 215 are fixed to the first adjustment platform 20 and coupled to the first adjustment column 212 and the second adjustment column 213, respectively, so that the gears 214, 215 are connected to the first adjustment column 212 and the second adjustment column 213. By altering the combined altitude, the altitude on the left side of the first adjustment platform 20 can be lowered or increased (see FIG. 4).
[0013]
Of course, similarly, by turning the knob 2211 of the second altitude adjusting means 22, the adjusting rod 221 is rotated, whereby the gears 224, 225 connected to the screw rods 2212, 2213 are rotated, and the gears 224, 225 are rotated. Are fixed to the first adjustment platform 20 and coupled to the first adjustment column 222 and the second adjustment column 223, respectively, so that the height of the gears 224, 225 to be coupled to the first adjustment column 222 and the second adjustment column 223, respectively. , The altitude on the right side of the first adjustment platform 20 can be raised and lowered (see FIG. 4). The height of the first adjustment platform 20 with respect to the fixed seat 10 can be adjusted by the combination of the first height adjustment means 21 and the second height adjustment means 22. Also, the use of the elastic means 216 and 226 provides a stable activity relationship. Taken together, the first adjustment platform 20 provides two degrees of freedom adjustment.
[0014]
As shown in FIG. 5, the second adjustment platform 30 includes a first slide platform 31 and a second slide platform 32, which are sequentially attached to the first adjustment platform 20, and respectively have slots 314, 324 and screws 315, 325, respectively. Is used, the second adjustment platform 30 is restricted to be slidable in a plane parallel to the first adjustment platform 20, and the relative distance between them is immutable. The first slide platform 31 is operated and adjusted using a knob 311 using a combination of a screw rod 312 and a gear 313, and is slidably adjusted in the left and right direction as illustrated. A mounting groove 301 is provided on the upper surface of the second slide platform 32 to be used for mounting a reflecting mirror (not shown), and the knob 323 is similarly exposed by using the connection between the screw thread 322 and the screw hole 321. The slide of the two-slide platform 32 is adjusted, and what is shown is the slide adjustment in the front-back direction. The second adjustment platform 30 provides another two degrees of freedom adjustment, the first adjustment platform 20 and the reflector each also provide two degrees of freedom, for a total of six degrees of freedom adjustment. In addition, the adjustment of each degree of freedom is independent adjustment and does not affect each other, and can provide a convenient adjustment function as compared with a known technique.
[0015]
In addition, the above-described embodiment is a description of one embodiment applying the basic spirit of the present invention, and the exchange of the adjustment mechanism and the adjustment of the degree of freedom between the platforms can be exchanged and modified using a simple method. . When applied to the rear projector 4, as shown in FIG. 6, the rear projector 4 includes a screen 44, a reflector 43, and a projector 41, and the projector 41 is connected to the rear projector 4 using an optical path adjusting device 42. The light beam emitted by the projector 41, which is fixed, is reflected by the reflecting mirror 43 and projected on the screen 44. The reflecting mirror 43 provides two degrees of freedom of rotation, and further provides the optical path adjusting device 42 of the present invention. The other four degrees of freedom adjustment provide a total of six degrees of freedom adjustment.
[0016]
【The invention's effect】
The present invention provides an optical path adjusting device for a projector and a rear projector including the same.The optical path adjusting device for the projector is designed with a plurality of platforms, and each platform controls one degree of freedom. Simple and accurate adjustment can be performed, and the stability and vibration absorbing ability of the adjustment device are increased.
[0017]
The foregoing is only a description of preferred embodiments of the present invention, and any changes and modifications that can be made based on the present invention shall fall within the scope of the present invention.
[Brief description of the drawings]
FIG. 1 is a display diagram of the present invention.
FIG. 2 is an exploded view of a first adjustment platform of the present invention.
FIG. 3 is a combination display diagram of a first adjustment platform of the present invention.
FIG. 4 is a combination display diagram of a first adjustment platform of the present invention.
FIG. 5 is a combination display diagram of a second adjustment platform of the present invention.
FIG. 6 is an embodiment diagram applied to a rear projector of the present invention.
[Explanation of symbols]
10 Fixed seat 20 First adjusting platform 21 First altitude adjusting means 211 Adjusting rod 2111 Knob 2112 Screw rod 2113 Screw rod 212 First adjusting column 213 Second adjusting column 214 Gear 215 Gear 22 Second altitude adjusting unit 221 Adjusting rod 2211 Knob 2212 Screw rod 2213 Screw rod 222 First adjustment column 223 Second adjustment column 224 Gear 225 Gear 226 Elastic means 30 Second adjustment platform 301 Mounting groove 31 First slide platform 311 Knob 312 Screw rod 313 Gear 314 Slot 315 Screw 32 2 slide platform 321 screw hole 322 screw thread 323 knob 324 long hole 325 screw 4 rear projector 41 projector 42 light path adjusting device 43 reflector 44 screen

Claims (16)

In the optical path adjusting device of the projector,
Fixed seat,
A first adjusting platform, mounted on the fixed seat, and comprising two sets of altitude adjusting means, the altitude adjusting means being respectively mounted on both ends of the first adjusting platform, of which one of the altitude adjusting means is used for the first adjusting platform; The first adjusting platform, wherein the tilt angle of the platform is adjusted and the two altitude adjusting means are adjusted in synchronization to adjust the distance between the first adjusting platform and the fixed seat;
A second adjustment platform, attached to the first adjustment platform and provided for mounting the projector, and comprising a movement adjustment means, in the direction of a plane parallel to the second adjustment platform; The second adjustment platform, wherein the position of the second adjustment platform relative to the first adjustment platform is adjusted;
An optical path adjusting device for a projector, comprising: 2. The optical path adjusting device for a projector according to claim 1, wherein each of the altitude adjusting means includes two adjusting columns located at the same end, and the two adjusting columns are synchronously adjusted at the time of adjustment, so that one end of the first adjusting platform is horizontal. An optical path adjusting device for a projector, wherein a state is maintained. The optical path adjusting device for a projector according to claim 2, wherein the altitude adjusting means includes a screw rod connected to the adjusting column, and the altitude of the first adjusting platform can be adjusted. 3. The optical path adjusting device for a projector according to claim 2, wherein an elastic means is attached to the adjusting column, and the elastic means has an elasticity perpendicular to a plane of the first adjusting platform, and the first adjusting platform is stable when adjusted. An optical path adjusting device for a projector, wherein the optical path adjusting device maintains the property. The optical path adjusting device for a projector according to claim 1, wherein the second adjusting platform is composed of two slide platforms. 6. The optical path adjusting device for a projector according to claim 5, wherein each of the two slide platforms provides two vertical slides. 7. The optical path adjusting device for a projector according to claim 6, wherein the two slide platforms are driven by a screw rod. 7. The optical path adjusting device for a projector according to claim 6, wherein the two slide platforms are driven by a screw connection method. In a rear projector including an optical path adjustment device, the rear projector includes an optical path adjustment device including a projector, a screen, and at least one reflecting mirror, and the optical path adjustment device of the projector is provided for mounting the projector, Optical path adjusting device of the projector,
A fixed seat attached to the rear projector,
A first adjusting platform, mounted on the fixed seat, and comprising two sets of altitude adjusting means, the altitude adjusting means being respectively mounted on both ends of the first adjusting platform, of which one of the altitude adjusting means is used for the first adjusting platform; The first adjusting platform, wherein the tilt angle of the platform is adjusted and the two altitude adjusting means are adjusted in synchronization to adjust the distance between the first adjusting platform and the fixed seat;
A second adjustment platform, attached to the first adjustment platform and provided for mounting the projector, and comprising a movement adjustment means, in the direction of a plane parallel to the second adjustment platform; The second adjustment platform, wherein the position of the second adjustment platform relative to the first adjustment platform is adjusted;
A rear projector comprising an optical path adjusting device, comprising: 10. A rear projector comprising the optical path adjusting device according to claim 9, wherein each of the altitude adjusting means includes two adjusting columns located at the same end, and at the time of adjustment, the two adjusting columns are synchronously adjusted to adjust the first adjusting platform. A rear projector including an optical path adjusting device, wherein a horizontal state of one end is maintained. 11. The rear projector including the optical path adjusting device according to claim 10, wherein the altitude adjusting means includes a screw rod coupled to the adjusting column, and can adjust the altitude of the first adjusting platform. Rear projector. 11. The rear projector provided with the optical path adjusting device according to claim 10, wherein an elastic means is attached to the adjusting column, and the elastic means has elasticity perpendicular to a plane of the first adjusting platform, and adjusts the first adjusting platform. A rear projector equipped with an optical path adjusting device, characterized by maintaining the stability of the projector. 10. The rear projector with an optical path adjusting device according to claim 9, wherein the second adjusting platform is composed of two slide platforms. 14. The rear projector with an optical path adjustment device according to claim 13, wherein the two slide platforms each provide two vertical slides. 15. The rear projector with an optical path adjusting device according to claim 14, wherein the two slide platforms transmit by a method of coupling a screw rod. 15. The rear projector with an optical path adjustment device according to claim 14, wherein the two slide platforms transmit by a screw thread connection method.

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