KR19990042777A - AMA panel positioning device for projection image display - Google Patents

Abstract

The present invention relates to a panel position adjusting device for adjusting the position of the AMA panel, the position of the AMA panel on the left and right fine adjustment (U _X ), up and down fine adjustment (U _Y ), front and rear fine adjustment (U _Z ) and Left and right (U _X ) adjustment knob, up and down (U _Y ) adjustment knob, front and rear (U _Z ) adjustment knob, Θ _Y angle adjustment knob for five degrees of freedom of angle adjustment (Θ _Y, Θ _Z ) And a Θ _Z angle adjustment knob, the panel position adjustment device comprising _: a grip portion having a driver groove formed at one end of the front and rear (U _Z ) adjustment knobs; A central shaft portion formed at the other end surface of the gripping portion and coupled to one side slit of the side frame; It is formed eccentrically from the center of the central shaft portion, it is made of a cam shaft portion coupled to the cam shaft hole of the second adjustment plate.

Therefore, the front and rear (U _Z ) adjustment knob 450 can adjust the front and rear direction (U _Z ) position of the plurality of holder assemblies 300 so that each holder assembly must have a front and rear (U _Z ) adjustment knob. Compared with the conventional coupling structure, the number of components can be reduced.

Description

AMA panel positioning device for projection image display

The present invention relates to an AMA panel positioning device of a projection image display device, and more particularly, the front and rear (U _Z ) adjustment knobs can be detached from the holder assembly after completing the front and rear (U _Z ) positioning operation of the panel. To one panel positioning device.

In general, a device for projecting optical energy onto a screen includes a direct-view image display device and a projection-type image display device according to a method of displaying optical energy on a screen. type image display device).

An example of a direct-view image display apparatus is a cathode ray tube (CRT), which is a so-called CRT device, which has excellent image quality but increases in weight and volume as the size of the screen increases, leading to an increase in manufacturing cost. There is.

Projection type image display devices are referred to as liquid crystal displays (hereinafter referred to as LCDs), deformable mirror devices (hereinafter referred to as DMDs), and actuated mirror arrays (hereinafter referred to as AMAs). ).

Since the LCD has a very simple optical structure, it can be thinly formed to reduce the weight and the volume. However, due to the polarity of light, the light efficiency is low, and there is a problem inherent in the liquid crystal material, for example, a slow response speed and a disadvantage in that the inside is easily overheated. In addition, the maximum light efficiency of existing transmission light modulators is limited to a range of 1 to 2% and requires dark room conditions to provide acceptable display quality.

Optical modulators such as DMD and AMA have been developed to solve the problems of the aforementioned LCD type optical modulators.

DMD shows a relatively good light efficiency of about 5%, but serious fatigue problems are caused by the hinge structure employed in the DMD. In addition, there is a disadvantage that a very complicated and expensive driving circuit is required.

In contrast, AMA is a piezoelectrically driven mirror array that provides light efficiency of 10% or more. In an AMA light modulator, each actuator generates a deformation in accordance with an electric field generated by an applied electric image signal and a bias voltage. When the actuator causes deformation, each of the mirrors mounted on the actuator is inclined to reflect the light incident from the light source at a predetermined angle.

The AMA optical modulator has a simple structure and operation principle, and can obtain high light efficiency compared to LCD or DMD. It also provides enough contrast to provide a bright and clear image under normal room temperature light conditions. Moreover, it is not only affected by the polarity of the incident light, but also by the polarity of the reflected light. In addition, the reflective properties of the AMA are relatively less sensitive to temperature, which has the advantage of improving the brightness of the screen compared to other devices that are easily affected by high power light sources.

As shown, the previously applied projection type image display apparatus includes a lamp assembly 1 for radiating high-brightness white light, a barrel lamp 3 for paralleling the beams radiated from the lamp assembly 1, and the lamp assembly. A source stop (4) formed with a hole so as to determine the amount of light radiated from (2), a source mirror (6) for reflecting the light beam passing through the source stop (4) in the direction of the AMA module assembly (5), A dichroic filter (2) which separates white light into main beams and reflects or transmits them to the respective AMA module assemblies (5), an AMA panel (5) which changes the optical path of the main beams incident upon the action of piezoelectric actuators, A projection stop (not shown in the figure) for limiting the transmission amount of the main beams whose light path is adjusted, a projection lens 7 installed for projecting the synthesized main beams in the direction of the screen, and a cage for embedding these components 8 ) Consists of

On the other hand, the AMA panel 5 is the AMA panel 5 in order to achieve the optimum position with the optical system, the left and right fine adjustment (U _X ), vertical fine adjustment (U _Y ), front and rear fine adjustment (U) on the plane _Z) and angle fine adjustment (there are five degrees of freedom to allow a fine adjustment panel position adjustment in the AMA holder assembly 100, the device is configured such Θ _Y, Θ _Z). (where Θ _Y is the starting point Y axis The angle of the AMA panel is adjusted as it is rotated, and Θ _Z is the angle of the AMA panel as it is rotated around the Z axis.)

FIG. 2 is an exploded perspective view showing the constituent members of the AMA holder assembly to which the AMA panel described in the patent application No. 97-28906 previously filed on June 30, 1997 by the applicant.

As shown, the conventional AMA holder assembly 100 includes a holder 120, a middle plate 130, a holder support plate 140, a first adjustment plate 150, and a first side on which an AMA panel is fixed. The plate 160, the second side plate 170, and the second adjustment plate 180 are configured.

The angle Θ _Y adjustment knob 210 is inserted from the right side to the left side of the second support bracket 148, and then the interposition member 212 is disposed between the right side surface of the locking jaw 218 and the left side surface of the adjustment knob 210. By being interposed, the second support bracket 148 is rotatably mounted. The threaded portion 216 of the adjustment knob 210 is coupled to the threaded hole of the cap member 214. Therefore, when the head portion of the adjustment knob 210 is rotated, the cam member 214 coupled to the screw portion 216 moves in the left and right directions U _X. At this time, according to the degree that the inclined surface of the cam member 214 is in contact with the lower end of the holder 120 is pushed in the left and right angle (Θ _Y ) direction around the hinge axis to the left and right of the AMA panel 120 The angle Θ _Y is adjusted.

Left and right (U _X ) adjustment knob 220 is coupled between the bracket 154 of the first adjustment plate 150 and the bracket 186 of the second adjustment plate 180 is rotated by adjusting the adjustment knob 220 The first adjustment plate 150 moves in the longitudinal direction U _X while the second adjustment plate 180 coupled to the threaded portion 226 of 220 is fixed. At this time, the guide bent portion 184 of the second adjustment plate 180 is in contact with the bent portions 164 and 174 of the first and second side plates 160 and 170, respectively. Guide the move. The middle plate 130 maintains a fixed position with the second adjusting plate 180, and the holder supporting plate 140 has a guide pin 145 in the width direction slit 152 of the first adjusting plate 150. ), The guide slit 162 of the first side plate 160, and the widthwise slit 172 of the second side plate 170 are respectively attached to the first adjustment plate 150 by adjusting the adjustment knob 220. By the control of, it moves in the left-right direction U _X with the 1st adjustment plate 150. FIG. As the holder support plate 140 moves in the left and right directions U _X , the AMA panel fixed to the holder 120 moves in the left and right directions U _X.

The upper and lower U _Y adjustment knobs 230 are rotatably inserted into the bracket 156 of the first adjustment plate 150 and screwed into the brackets 168 of the first side plate 160. On the other hand, the screw 166 is guided through the slit 161 to be fastened to the screw hole 153 of the first adjustment plate 150. Therefore, when the adjustment knob 230 is rotated, the slit 152 and the guide slit 162 move the first side plate 160 in the horizontal direction U _X with respect to the bracket 156 of the first adjustment plate 150. The holder support plate 140 is moved in the up and down direction U _Y with respect to the first adjustment plate 150 by the guide pin 145 coupled thereto. The first adjusting plate 150 is maintained in a vertical state U _Y by the bent portion 184 and the bent portions 164 and 174. Accordingly, the holder supporting plate 140, the holder 120, and the AMA panel mounted thereon are vertically held while the positions of the first and second adjustment plates 150 and 180 and the middle plate 130 are fixed. It is adjusted in the direction U _Y.

The angle Θ _Z adjustment knob 240 is rotatably inserted into the bracket 158 of the first adjustment plate 150 and is screwed with the bracket 178 of the second side plate 170. The screw 176 is coupled to the longitudinal slit 172 of the second side plate 170 and secured to the threaded hole 151 of the first adjustment plate 150. The guide pin 147 of the holder support plate 140 is coupled to the slit 172 of the second side plate 170 and the slit 155 of the first adjustment plate 150. Accordingly, when the adjustment knob 230 is rotated, the holder support plate 140 is slitd while the second side plate 170 is moved in the horizontal direction U _X with respect to the bracket 158 of the first adjustment plate 150. The guide pin 145 coupled to the 152 and the guide slit 162 moves in the (Θ _Z ) direction.

The front and rear (U _Z ) adjustment knob 250 comprises a cylindrical head portion 252 having a driver groove formed at one end thereof, and an insertion portion 254 formed at the other end eccentrically from the center of the head portion 252. It is coupled to both ends in the longitudinal direction of the (100), the cylindrical connecting member 256 is fixedly coupled between the insertion portion 254. The circumferential surface of the head portion 252 is coupled to the slit formed in the vertical direction at one end of the side frame not shown in the drawing, the circumferential surface of the connecting member 156 is a bracket 181 of the second adjustment plate 180 It is coupled to the through holes 185 and 186 of the 182. Accordingly, when the adjustment knob 250 is rotated, the head 252 moves in the slit in the vertical direction (U _Y ) while the connecting member 256 is rotated about the eccentric shaft to fix the second adjustment plate with respect to the fixed side frame. Move 180 in the front-rear direction U _Z. Thus, the holder assembly 100 that includes a second adjustment plate 180 is moved in the front-rear direction (U _Z) is adjusted in the front-rear direction (U _Z) position of the AMA panel.

However, in such a conventional panel position adjusting device, the front and rear (U _Z ) adjustment knob 250 for adjusting the front and rear direction (U _Z ) position of the panel is mounted on the holder assembly 100 even after the position adjustment operation is completed. There was a disadvantage to maintain. That is, after adjusting the front and rear direction (U _Z ) position of the panel with the adjustment knob 250 and then fixed to the adjusted position using a fixing screw, etc., even though the adjustment knob 250 is unnecessary, the adjustment knob 250 is a holder. Both ends of the assembly 100 had a coupling structure that cannot be separated. Accordingly, since the adjustment knob 250 must be provided for each holder assembly 100, the manufacturing cost of the component parts is increased.

Therefore, the present invention has been made to overcome the above-mentioned disadvantages, and after completing the front and rear direction (U _Z ) positioning operation of the panel, the front and rear (U _Z ) adjustment knob can be separated from the holder assembly to reduce the number of parts. The object is to provide a panel positioning device that can be saved.

The present invention for achieving this object is an AMA to a holder assembly consisting of a holder, a middle plate, a holder support plate, a first adjustment plate, a first side plate, a second side plate and a second adjustment plate to which the AMA panel is fixed. The panel position can be adjusted in five degrees of freedom: left and right fine tuning (U _X ), vertical fine tuning (U _Y ), front and rear fine tuning (U _Z ) and angle fine tuning (Θ _Y, Θ _Z ). In the panel positioning device provided with a left and right (U _X ) adjustment knob, up and down (U _Y ) adjustment knob, front and rear (U _Z ) adjustment knob, Θ _Y angle adjustment knob and Θ _Z angle adjustment knob. _Z ) an adjustment knob is formed on the gripping portion, the other end surface of the gripping portion and coupled to one side guide slit of the side frame, and is eccentrically formed from the center of the central shaft portion, and the cam shaft hole of the second adjustment plate. Coupled to It made up of the cam shaft to provide the panel position adjusting device capable of positioning the holder assembly in the longitudinal direction (U _Z) with respect to the side frame.

According to the present invention, the guide slit of the side frame is formed as a long hole in the vertical direction to move in the vertical direction while the central shaft portion is rotated, the diameter of the central shaft portion is formed the same as the short axis of the guide slit.

According to the present invention, the diameter of the eccentric shaft portion is formed to be equal to the diameter of the cam shaft hole of the second adjusting plate so that the front and rear direction U _{Z of} the second adjusting plate can be moved according to the eccentric rotation of the eccentric shaft portion.

According to the present invention, the front and rear (U _Z ) adjustment knob is coupled to enable insertion and removal from one side of the side frame.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

1 is a schematic diagram showing a projection image display device using a conventional AMA;

2 is an exploded perspective view showing a constituent member of the conventional AMA panel positioning device;

3 is an exploded perspective view showing a constituent member of the AMA panel positioning device according to the present invention;

4 is a front sectional view of an AMA panel positioning device according to the present invention;

5 is a perspective view showing another embodiment of the front and rear adjustment knob according to the present invention.

<Description of Symbols for Main Parts of Drawings>

300; Holder assembly 380; 2nd adjusting plate

385; Through hole 387; Brackets

388; Camshaft hole 450; Front and rear adjustment knob

452; Gripping portion 454; Central axis

456; Camshaft portion 460; Side frame

462; Guide slit

Hereinafter, an AMA panel position adjusting device of a projection image display device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is an exploded perspective view showing the constituent members of the AMA panel positioning device according to the present invention, Figure 4 is a front sectional view of the AMA panel positioning device according to the present invention.

As shown, the AMA holder assembly 300 is a holder 320 to which the AMA panel is fixed at the top, the holder 320 is rotatably mounted around the hinge axis, the Θ _Y angle adjustment knob 410 on one side The holder support plate 340 is installed, the middle plate 330 interposed between the holder 320 and the holder support plate 340, located below the holder support plate 340, and adjusts the left and right (U _X ) in one central part. up-and-down direction of the knob 420 is installed and the vertical to the front and rear side (U _Y) adjustment knob 430, and Θ _Z each control knob first adjustment plate 350, a first adjusting plate (350) (440) is installed, The first side plate 360, which is installed on one side and is coupled to the threaded portion of the upper and lower (U _Y ) adjustment knobs 430, is installed on the other side of the first adjustment plate 350 in the vertical direction, and the threaded portion of the θ _Z angle adjustment knobs 440. Positioned under the second side plate 170 and the first adjustment plate 350 coupled to the DE frames are provided so as to be movable in the longitudinal direction on the (460) it consists of a front and rear (U _Z) to adjust the eccentric shaft portion second adjustment plate 380, which 456 is installed in the knob 450 at one side.

The angle (Θ _Y ) adjustment knob 410, the left and right (U _X ) adjustment knob 420, the up and down (U _Y ) adjustment knob 430, and the angle (Θ _Z ) adjustment knob 440 are the conventional structures described above. Since it is made of the same coupling structure and detailed description thereof will be omitted.

Front and rear (U _Z ) adjustment knob 450 according to a characteristic element of the present invention is a gripping portion 452, a central shaft portion 454, the other end surface of the gripping portion 452 is formed in the center, and the central shaft portion It consists of a camshaft part 456 formed eccentrically from the center of 454. A driver groove may be formed at one end of the gripping portion 452 to operate the driver. In addition, the auxiliary gripping portion 452 'is formed in a direction orthogonal to the central axis portion 454 so that it can be conveniently operated by hand.

On the other hand, a bracket 387 is formed on the bottom of the second adjustment plate 380 at predetermined intervals in the left and right direction, and the cam shaft hole 388 is formed on the bracket 387 on the same left and right axis as the through hole 385. Is formed. In addition, a long slot-shaped guide slit 462 is formed at one end of the side frame 460 in the same straight line as the through hole 385 and the cam shaft hole 388.

The guide slit 462 has a long axis in the vertical direction, and consists of a long hole having a short axis in the front and rear directions.

The diameter φ A of the grip portion 452 of the adjustment knob 450 is formed to be similar to the short axis diameter φ A ′ of the guide slit 462 of the side frame 460, and the diameter of the cam shaft portion 456. φa is formed to be similar to the diameter φa 'of the camshaft hole 388 of the second adjusting plate 380.

The adjustment knob 450 penetrates the guide slit 462 of the side frame 460, penetrates the through hole 385 of the second adjustment plate 380, and moves the cam shaft hole 388 on the same axis. Is coupled through, the circumferential surface of the central shaft portion 454 of the adjustment knob 450 is in contact with the guide slit 462 of the side frame 460 and the through hole 385 of the second adjustment plate 380, The circumferential surface of the camshaft 456 is in contact with the camshaft hole 388 of the second adjustment plate 380.

Therefore, when the grip part 452 of the adjustment knob 450 is rotated using a driver or the like, the central axis part 454 moves in the vertical direction U _Y in the guide slit 462 of the fixed side frame 460. In this case, since the cam shaft 456 rotates about the eccentric shaft, the cam shaft 456 moves within an eccentric displacement in the vertical direction U _Y and the front and rear directions U _Z. On the other hand, the movement of the eccentric cam 456, the vertical direction (U _Y) of the so proceed at the same time as the vertical direction (U _Y) movement of the central axis (454) cancel each other. Therefore, only the displacement of the front and rear direction U _Z of the eccentric cam 456 is transmitted to the second adjustment plate 380, so that the position of the front and rear direction U _Z of the holder assembly 300 can be finely adjusted.

After adjusting the front and rear direction (U _Z ) position with the front and rear (U _Z ) adjustment knob 450 as described above, the second adjusting plate 380 is fixed to the side frame 460 by using a fixing means such as a screw (not shown). The front and rear (U _Z ) adjustment knob 450 is disengaged. That is, the front and rear (U _Z ) adjustment knob 450 according to the present invention has a coupling structure that is inserted from one side of the second adjustment plate can be separated after finishing the position adjustment. Therefore, the front and rear (U _Z ) adjustment knob 450 can adjust the front and rear direction (U _Z ) position of the plurality of holder assemblies 300 so that each holder assembly must have a front and rear (U _Z ) adjustment knob. Compared with the conventional coupling structure, the number of components can be reduced.

In the above description, it should be understood that those skilled in the art can make modifications and changes to the present invention without changing the gist of the present invention as it merely illustrates a preferred embodiment of the present invention.

As described above, according to the present invention, the front and rear direction (U _Z ) of the plurality of holder assemblies with one front and rear (U _Z ) adjustment knob by providing a coupling structure that can be released after the front and rear direction (U _Z ) position adjustment. _Z ) The position can be adjusted, which can reduce the number of components and reduce the production cost.

Claims (7)

Finely adjust the position of the AMA panel on the left and right in a holder assembly consisting of a holder, a middle plate, a holder support plate, a first adjustment plate, a first side plate, a second side plate and a second adjustment plate to which the AMA panel is fixed. U _X), the vertical fine adjustment (U _Y), before and after fine-tuning (U _Z) and angle fine adjustment (Θ _Y, the right and left (U _X) adjustment knob, the vertical FIG five kinds of freedom of Θ _Z) to allow fine adjustment In the panel positioning device provided with a (U _Y ) adjustment knob, front and rear (U _Z ) adjustment knob, Θ _Y angle adjustment knob and Θ _Z angle adjustment knob, The front and rear (U _Z ) adjustment knob and the gripping portion; A central shaft portion coupled to a guide slit formed on one side of the side frame; Eccentric from the center of the central shaft portion is formed extending from the central shaft portion, consisting of a cam shaft portion coupled to the cam shaft hole of the second adjustment plate, coupled to enable insertion and detachment and the front and rear of the holder assembly with respect to the side frame Position adjustment device for the AMA panel of the projection image display device which can be adjusted in the direction (U _Z ). The position of the AMA panel of the projection type image display apparatus according to claim 1, wherein the guide slit of the side frame is formed in a long hole shape in a vertical direction so that the second plate can be moved in the front-rear direction while the central shaft portion is rotated. Adjustment device. The AMA panel position adjusting device of a projection image display device according to claim 1, wherein the diameter of the central shaft portion is formed to be similar to the short axis diameter of the long slot-shaped guide slit. The AMA panel position adjustment apparatus of claim 1, wherein the camshaft hole is formed at one end of a bracket formed below the second adjustment plate. The projection type image according to claim 1, wherein the diameter of the eccentric shaft portion is formed to be similar to the diameter of the cam shaft hole so that the front and rear direction U _Z of the second adjustment plate can be moved according to the eccentric rotation of the eccentric shaft portion. AMA panel positioning device on display. The AMA panel position adjusting device of a projection image display device according to claim 1, wherein a driver groove is formed at one end of the gripping portion. 2. An AMA panel position adjusting device according to claim 1, wherein an auxiliary gripping portion orthogonal to the axial direction of the central axis portion is formed at one end of the gripping portion.