KR100241422B1 - Optical regulator of projection system - Google Patents

Abstract

The present invention relates to an optical controller of a projection system, comprising: a projection system in which one color image is magnified and displayed on a screen by images projected by three projectors, the adjustment image projected by the projector and formed on a screen; An optical lens comprising an imaging lens for forming an image into a projector again, a quadrature element for detecting an image formed by the imaging lens as a voltage or current value, and the projection by the voltage or current difference detected from the optical controller. And a projector driving device for correcting the position of the eye.

The present invention has the effect of simple and precise adjustment of the exact positional arrangement of the components in the projection system, the present invention is a front and rear projection system using a multi-projector, front and rear projection TV and video using a multi-projector It can be applied to multi-projection system and TV.

Description

Optical regulator of the projection system

1 is a block diagram of a conventional projection system.

2 to 8 are views showing the configuration and operation of the projection system according to the present invention,

2 is an overall configuration diagram of a projection system.

3 and 4 (a), 4 (b) is a diagram showing a different embodiment of the light regulator.

5 is an explanatory diagram of the operation.

Fig. 6 (a) and Fig. 6 (b) are explanatory diagrams of adjustment actions.

Fig. 7 (a) is a cross-sectional view showing the structure of the projector driving apparatus Fig. 7 (b) is a cross-sectional view showing the rotation support plate side configuration, and Fig. 7 (c) is a cross-sectional view taken along the line A-A of Fig. 7 (a).

8 (a) and 8 (b) are exploded and combined perspective views of partially cutout portions of the projector driving device.

* Explanation of symbols for main parts of the drawings

1 screen 2: magnified projection lens

3 projector 4 light controller

5: imaging lens 6: 4-split element

7: rotating support plate 7a: annular guide groove

10: fixed bracket 11: one side support plate

12: other side support plate 13: drive motor

13a: drive shaft 13 ′: magnet

14 drive support member 14a cylindrical portion

14b: between upper and lower guide 14c: annular protruding ring

14d: end 15: driven gear

16: drive gear 17: rack

18: through hole 19: upper and lower guide hole

20,20 ′: Bearing 22: Guide

22a: guide hole 23: support shaft

The present invention relates to an optical controller of a projection system that minimizes the difficulty of optical alignment of a screen and a projector in a projection apparatus and a projection TV.

In the conventional projection system, there are many difficulties in the correction of the image change and the overall shape change due to the arrangement of the screen and the projector and the mechanical error, and the adjustment also depends only on the correction by vision.

1 is a view showing the configuration of a conventional projection system, in which 1 is a screen, 2 an imaging lens, and 3 is a projector such as CRT. In this conventional projection system, an image produced by the R, G, B projectors 3, which are image projectors, is enlarged and projected by the projection lens 2 to form an image on the screen 1. In the case of a three-tube-3 line arrangement, three enlarged projected images are formed on the screen 1 so that both head images are off-centered from the screen 1 as compared to the center image.

This off-center movement of the phase requires precise adjustment. However, arrangements and adjustments were made based on time, unless otherwise specified. Therefore, it contains many error factors and has a lot of difficulty in adjusting.

As described above, the dependence of vision on the adjustment of small optical and mechanical errors in the projection system implies a greater error occurrence factor. And in mass production, the fine tuning of all products results in technical and time loss. In particular, the optical values are fine so that the adjustment by the sensor and the mechanism is inevitable rather than the adjustment by vision.

The present invention has been devised to solve the above-mentioned defects, and the mechanical and optical errors caused by the distance between the projection system air projectors forming one image on one screen using multiple projectors are eliminated. It is an object of the present invention to provide an optical controller of a projection system that can sense by using a four-part photodiode, an imaging lens, and a pinhole to precisely adjust the optical mechanical arrangement.

In order to achieve the above object, the present invention provides a projection system in which one color image is enlarged and displayed on a screen by an image projected by three projectors, and the adjustment image projected by the projector and formed on the screen is again displayed. An optical controller comprising an imaging lens for imaging with a projector, a quadrature element for detecting an image formed by the imaging lens as a voltage or a current value, and a position of the projector by a voltage or current difference detected from the optical controller It is configured to include a projector driving device to correct the.

Hereinafter, the apparatus of the present invention will be described in detail with reference to the accompanying drawings.

2 shows a configuration of a projection system according to the present invention, in which 1 shows a screen such as a screen, 2 shows an enlarged projection lens, 3 shows a CRT, and 4 shows a light controller.

In the present invention, as shown in FIG. 2, the light regulators 4 are respectively coupled to the center and the corrected positions of the projectors 3, and the light adjusters 4 adjust the image.

Figure 3 (a) (b) shows the configuration of the light regulator 4 according to the present invention, (a) is a light regulator opening degree using a lens, (b) is a quadrature element and a voltage difference generating circuit will be.

4 (a) and 4 (b) show another embodiment of the light regulator according to the present invention, (a) is a schematic view of the light regulator using a pinhole, and (b) shows a four-division element.

As shown in FIG. 3 and FIG. 4, the light regulator 4 is composed of a four-segment element 6 such as a four-segment photodiode, an imaging lens 5 or a pinhole 5 '. .

7 (a) is a sectional view showing the configuration of the projector driving apparatus (b) is a cross-sectional view showing the rotational support promotion configuration, (c) is a cross-sectional view taken along the line AA of (a), and FIG. (b) shows a partially cutout exploded perspective view and a combined perspective view of the projector driving device, respectively. As shown in FIG. 7, the projector 3 may move left and right using a gear and a DC-motor as shown in FIG. It is configured to rotate, and the drive motor 13, such as a DC motor, which provides a driving force to the drive device for horizontally moving and rotating the projector 3 is caused by the voltage difference generated in the quadrant 6 Rotation is controlled.

Since the 4-split element 6 senses a small amount of change (μ unit), the 4-split element 6 forms an image with a lens having a small focal length so as to accurately form an adjustment amount (image of a screen) corresponding to an object on the 4-split element 6. The light adjusters 4 thus constructed are fixed to predetermined positions of the respective projectors 3 as shown in FIG.

The driving device for adjusting the position by linearly moving and rotating the projector 3 rotates the projector 3 by the drive motor 13 and the gears 15 and 16, and the drive motor 13 and the gear. It is comprised so that the position may be adjusted by linear movement by 16 and the rack 17. FIG.

The drive shaft 13a of the drive motor 13 is allowed to move forward and backward by the magnet 13 '. As the drive shaft 13a of the drive motor 13 moves forward, the drive gear 16 is a wave gear ( And the drive gear 16 is bitten by the rack 17 while the drive shaft 13a returns to its original state.

When explaining the configuration of the drive device for adjusting the position of the projector 3 in more detail, one support plate 11 and the other support plate 12 is fixed to a casing in which the projection system is built a fixed distance, the projector ( 3) is coupled to the projector fixing bracket 10 is coupled between one side support plate 11 and the other side support plate 12, the projection lens 2 is coupled to the front of the projector 3 by the coupler (9). It is.

Through-holes 18 are formed in the middle portion of the other side support plate 12, and guide holes 19 are formed in the upper and lower portions thereof, respectively, and the driving support member 14 is coupled to the other side support plate 12. .

The driving support member 14 has a pair of guide bars 14b integrally formed at one end of the cylindrical portion 14a up and down, and an annular protruding ring 14c is formed at the outer circumferential surface of the cylindrical portion 14a. The driving support member 14 includes an upper and lower guide rod 14b inserted into the upper and lower guide holes 19 of the other supporting plate 12 to guide the hole based on FIG. 7C. It is coupled to move from side to side along (19).

In addition, the support bracket 7 is fixed to the fixed bracket 10, and the end portion 14d of the driving support member 14 is inserted into the annular guide groove 7a formed in the rotation support plate 7. The fixed bracket 10 may rotate by inserting the support shaft 23 fixed to the other side of the fixed bracket 10 into the guide hole 22a formed in the guide 22 of the one side support plate 11. It is supposed to be.

The driving motor 13 is inserted into the driving support member 14 to be fixed between the upper and lower guide bars 14b, and the driving shaft 13a of the driving motor 13 is a housing of the driving motor 13. The magnet 13 'coupled to the inner and the outside is enabled to go out, and the drive gear 16 is fixed to the front end of the drive shaft 13a.

The driven gear 15 is fixed to the middle portion of the rotary support plate 7, the rack 17 is fixed to the intermediate through hole 18 of the other support plate 12, and the drive shaft 13a is extended to the outside. When the gear 16 is engaged with the driven gear 15 and is reduced inward, the drive gear 16 is configured to engage with the rack 17.

In addition, the bearing 20, 20 'between the other side support plate 12 and the annular protruding ring 14c, and between the rotary support plate 7 and the annular protruding ring 14c to facilitate linear movement and rotation. ) Is combined.

The drive gear 16 is a double gear having gears formed on an inner circumferential surface and an outer circumferential surface thereof, and meshes the driven gear 15 with the inner gear and the rack 17 with the outer gear.

5 is an explanatory diagram of the operation, and FIGS. 6 (a) and 6 (b) are explanatory diagrams of the adjustment operation. In FIG. 5, reference numeral 8 denotes an adjustment phase, and FIGS. 6 (a) and (b) Reference numeral 8 'shows an image of an adjustment phase.

Hereinafter, the operational effects of the present invention as described above will be described with reference to FIGS. 2 to 7.

Each projector 3 and projection lens 2 of the projection system are arranged at the projection position, and the initial adjustment image is imaged on the screen by the central projector 3 and the projection lens 2. Then, the adjustment image formed on the screen 1 is imaged on the projector 3 on both sides and the light controller 4 located on the projection lens 2 (see FIG. 6).

Thereafter, the voltage difference and the current difference due to the images formed in the four-segment element 6 are compared and analyzed to arrange the projectors 3 and the projection lenses 2 on both sides in the correct positions.

Subsequently, a voltage difference is obtained by using the four-segment element 6 configured as shown in FIG. 3 and the OP-amp shown in FIG. 3 to rotate and project the block of the projector 3 to the left and right by the driving force of the drive motor 13 of the driving apparatus. Will be adjusted.

In the driving device, the rotation of the block of the projector 3 is adjusted as the gears 15 and 16 and the driving motor 13 of FIG. 7, and the left and right driving are the gear 16 and the rack 17 and the driving motor 13. ).

When the projector 3 is rotated, the drive shaft 13a is advanced by the magnet 13 'so that the drive gear 15 and the driven gear 15 mesh with each other to rotate. The left and right movements are such that the drive gear 16 is bitten by the rack 17 while the drive shaft 13a returns to its original state, between the other support plate 12 and the annular protruding ring 14c, and the rotation support plate 7. Bearings 20 and 20 'are coupled between the annular protruding ring 14c to facilitate linear movement and rotation, thereby changing the position of the projector 3 while smoothly rotating and moving left and right. Let it be.

The drive gear 16 connected to the drive shaft 13a of the drive motor 13 rotates the driven gear 15 by an internal gear, and engages with the rack 17 to move left and right. The drive shaft 13a and the support shaft 23 rotate about the same axis, and the support shaft 23 moves along the guide hole 22a of the guide 22 when moving left and right and guide hole 19 at the stopped position. To rely on

As described above, the present invention uses a three-tube three-lens in-line projection system to enlarge and project on one screen to finely adjust optical and mechanical values in the arrangement of the projectors. The error can be minimized. In the case of mass production of the projection system, the projection system and the screen can be used for the alignment inspection of each projector, and the arrangement of the multiple projection system and the alignment of the projector can be arranged in a direction that minimizes errors. In addition, it is possible to easily correct the convergence angle due to the spacing of each projector. In addition, the present invention can improve the optical performance such as color shift, uniformity of the image by minimizing the error of the optical, mechanical correction amount and the exact positional arrangement of the components using the four-segment device.

As described above, the present invention is used in the front and rear projection system consisting of a three-tube lens and a three-tube, three-lens array to position the optical controller in each projector and then use it for optical and mechanical adjustment of each projector. In the case of mass production, it is used to arrange the position of each projector. In the case of mass production, it is used to examine the position of each projector. It can be used very advantageously for convergence correction.

Claims (4)

In a projection system in which one color image is magnified and displayed on the screen 1 by the images projected by the three projectors 3 respectively, the adjustment image projected by the projector 3 and formed on the screen 1. An optical controller 4 composed of an imaging lens 5 for forming an image into the projector 3 again, a quadrature element 6 for detecting an image formed by the imaging lens 5 as a voltage or a current value; An optical control of the projection system, characterized in that the projection comprises a driving device for correcting the position of the projector (3) by the voltage or current difference detected from the light regulator (4). The optical adjuster of a projection system according to claim 1, wherein the projector driving device is configured to correct the position by rotating and horizontally moving the projector (3). According to claim 2, wherein the projector drive device is fixed to the casing, the support plate 11 is provided with a guide 22 having a guide hole (22a), and the through hole 18 is formed in the middle and the upper, lower A guide hole 19 is formed in the other support plate 12 fixed at a predetermined distance from the one side support plate 11 and a pair of upper and lower guide sections 14b at one end of the cylindrical portion 14a. A driving support member 14 which is formed and is inserted into the upper and lower guide holes 14b of the other supporting plate 12 into the upper and lower guide gaps 14b and moves left and right, and a fixed bracket fixing the projector 3. Rotating support plate 7 fixed to one side of the kit 10 and provided with an annular guide groove 7a and rotatably coupled to the end 14d of the drive support member 14 by the annular guide groove 7a. And a support shaft 23 fixed to the other side of the fixing bracket 10 and inserted into the guide hole 22a of the guide 22, and the driving support member. A drive motor 13 fixed between the upper and lower guide bars 14b of the 14 and removably coupled to the drive shaft 13a by a magnet 13 ', and an intermediate portion of the rotary support plate 7; The driven gear 15 to be fixed, the rack 17 fixed to the upper portion of the intermediate through-hole 18 of the other supporting plate 12, and the driven gear 15 and the rack are fixed to the distal end of the drive shaft 13a. And a drive gear (16) for selectively engaging the (17) to rotate or linearly move the block of the projector (3). According to claim 3, Between the annular projection ring 14c and the other support plate 12 provided in the cylindrical portion (14a) of the drive support member 14, and the annular projection ring (14c) and the rotary support plate ( 7) The optical controller of the projection system, characterized in that composed of a combination of the bearings 20, 20 'to facilitate the linear movement and rotation between.