KR100373934B1 - Liquid crystal align apparatus for liquid crystal beam projector - Google Patents

Abstract

The present invention relates to a liquid crystal alignment apparatus, and more particularly, to a liquid crystal alignment apparatus for a liquid crystal beam projector configured to adjust respective liquid crystals to minimize misconvergence of beams reflected through three liquid crystals in a reflective liquid crystal beam projector. It is about.

An object of the present invention is to solve the above problems, to provide a liquid crystal alignment device for a liquid crystal beam projector that can minimize the volume as well as make adjustments in all directions, and improve the adjustment accuracy. have.

In order to achieve the above object, the present invention provides a fixed lower plate (1), an upper plate (2) located on the upper surface of the lower plate (1) and movable to front, rear, left and right, and the lower A horizontal drive means formed between the upper plates 1 and 2 to adjust the focus by moving the upper plate 2, a support rail 3 fixed to the upper plate 2 in the horizontal direction, A rectangular plate-shaped bracket 4 which is located on the upper surface of the support rail 3 and is rotatably connected to the X axis by a rolling means, and is coupled to the bracket 4 by a tilting means, and is centered on the X axis. Characterized in that it consists of a reflective liquid crystal panel 51 installed to adjust the inclination angle.

Description

Liquid crystal alignment apparatus for liquid crystal beam projector

The present invention relates to a liquid crystal alignment apparatus, and more particularly, to a liquid crystal alignment apparatus for a liquid crystal beam projector configured to adjust respective liquid crystals to minimize misconvergence of beams reflected through three liquid crystals in a reflective liquid crystal beam projector. It is about.

In general, a beam projector and a rear projection TV using a liquid crystal panel (LCD) reproduce images by combining RGB colors using three transmissive or reflective liquid crystal panels.

6, the beam splitter 52 reflecting the white beam emitted from the illumination optical system 50 toward the liquid crystal panel 51, and the beam splitter 52. It is composed of an X prism 54 for separating and supplying the reflected light to the three liquid crystal panel 51 and projecting it back to the projection lens 53 through the beam splitter 52.

That is, when a white beam is emitted from the illumination optical system 50, the beam splitter 52 reflects the white beam to the X prism 54, and the white beam is three liquid crystal panels 51 through the X prism 54. When the beams are dispersed in the beam splitter 52, the beams are reflected by the beam splitter 52 and the beams are combined by the projection lens 53 to reproduce an image.

Therefore, an important factor for determining the image quality is how much the pixels in the three liquid crystal panels 51 match.

That is, the diagonal size of the liquid crystal panel 51 is about 1.3 inches, and in the case of the XGA class, the pitch between pixels is within several tens of micrometers, so it is very important to precisely match the pixels in the liquid crystal panel 51 described above. Will be done.

Therefore, in order to match the pixels of the liquid crystal panels 51 described above, an adjustment mechanism capable of adjusting each of the liquid crystal panels 51 may be integrally installed or adjusted, or a separate adjustment apparatus may be manufactured to adjust the liquid crystal panel 51. After the adjustment, the LCD beam projector is assembled.

However, as described above, when a separate adjustment device is installed in each of the liquid crystal panels, the adjustment device needs to be moved forward, backward, left and right, and rotated, left and right, and tilted up and down. Increasingly, there is a problem that it is difficult to achieve miniaturization of the liquid crystal beam projector.

In addition, when assembling the liquid crystal beam projector after adjusting the liquid crystal using a separate adjusting device when assembling the liquid crystal beam projector, since the liquid crystal must be adjusted outside the liquid crystal beam projector assembly line of the liquid crystal beam projector, The adjusting device itself becomes complicated, and accordingly, there is a problem that the investment cost for facility investment and automation becomes large.

Accordingly, an object of the present invention is to solve the above problems, and it is possible to minimize the volume as well as to adjust in all directions, the liquid crystal alignment apparatus for a liquid crystal beam projector that can improve the adjustment accuracy In providing.

In order to achieve the above object, the present invention is formed between a fixed lower plate, an upper plate positioned on the upper surface of the lower plate and movably moved back, front, left, and right, and the lower and upper plates. A horizontal drive means for adjusting focus by moving the plate, a support rail fixed in the horizontal direction to the upper plate, and a quadrangle positioned on the upper surface of the support rail and rotatably connected to the X axis by a rolling means. It is characterized by consisting of a plate-like bracket, and a reflective liquid crystal panel coupled to the bracket by a tilting means and installed to adjust the inclination angle about the X axis.

1 is a perspective view showing a liquid crystal aligning device for a liquid crystal beam projector according to the present invention;

2 is an exploded perspective view of FIG. 1;

3 is a cross-sectional view illustrating the damper in FIGS. 1 and 2;

4 is a front view showing the roller and the support rail for rotation adjustment in FIG.

5 is a cross-sectional view showing the focus and left and right positioning hub in FIG.

6 is a schematic diagram showing a reflective three-panel optical system in a general liquid crystal beam projector.

<Description of the symbols for the main parts of the drawings>

1: lower plate 2: upper plate

3: support rail 4: Bracket

5: fixing hole 6: guide ball

7: fixing pin 8: rotating pin

9: operator 10: adjustment hub

11 damper 12 liquid crystal panel fixing pin

13 tilting adjustment hub 14 through hole

15: groove 16: support groove

17: roller 19: screw hole

20: adjusting groove 21: flange

22: adjusting screw

1 and 2 are a perspective view and an exploded perspective view showing a liquid crystal aligning device for a liquid crystal beam projector according to the present invention. As shown in the drawing, a lower plate fixed as a plate member provided on the lower side is shown in the drawing. (1) is formed between the upper plate (2) arranged as a top plate located above the lower plate (1) so as to be movable forward, backward, left and right, and the lower and upper plates (1, 2). Horizontal drive means for adjusting the focus by moving the upper plate 2, the support rail 3 fixed in the horizontal direction to the upper plate 2, and the upper surface of the support rail 3, A square plate-shaped bracket 4 rotatably connected to the axis by a rolling means, and a reflection installed to adjust the inclination angle about the X axis by being coupled to the bracket 4 by a tilting means. Type lower liquid crystal panel 51. The lower plate 1 is fixed to a predetermined fixing plate or the like not shown, and the above-described configurations are used to form the X prism 54 as shown in FIG. It is arranged in three directions.

Here, the horizontal drive means is fixed pin (7) is inserted into the guide hole (6) one end is fixed to the fixing hole (5) of the lower plate (1) and the other end is formed in the four corners of the upper plate (2) And an adjustment hub 10 fixed to the lower plate 1 by the rotary pin 8 and inserted into a rectangular working hole 9 formed in the upper plate 2.

In addition, the tilting means is located between the liquid crystal panel 51 and the bracket 4 and configured to be spaced apart by a predetermined interval, and the four dampers 11 of a soft material, the liquid crystal panel 51 and four Liquid crystal panel fixing pin 12 penetrating and fixing each of the dampers 11 and the bracket 4, and four tilting adjustment screwed to the liquid crystal panel fixing pin 12 and positioned on the back of the bracket (4) It consists of the hub 13.

Here, the damper 11 has a through hole 14 through which the liquid crystal panel fixing pin 12 penetrates as shown in FIG. 3, and an outer diameter and a diameter in order to soften the contraction and expansion of the damper 11. It consists of the groove part 15 formed in the inner diameter.

That is, the groove 15 is formed so that the damper 11 is more easily compressed or expanded when the tilting hub 13 tightens or loosens the liquid crystal panel fixing pin 12.

As shown in FIG. 4, the rolling means is inserted into the support groove 16 formed at the center of the support rail 3 and the support groove 16 and installed to adjust the left and right angles of the bracket 4. A flange 21 protrudingly formed at both ends of the roller 17 and the bracket 4, and an adjustment groove 20 formed to correspond to a screw hole 19 formed in the support rail 3, and the above-described adjustment. The screw head is positioned in the groove 20 and is screwed to the screw hole 19 and is composed of an adjustment screw 22 that can move the bracket 4 when rotating.

That is, when the adjustment screw 22 is tightened or loosened as shown by the arrow, the bracket 4 may be rotated around the roller 17 to adjust the rotation angle.

When explaining the operation and effect of the present invention as described above, it is to perform the tilt adjustment, rotation adjustment, focus and up, down, left and right adjustment in order.

That is, the tilt amount of the liquid crystal panel 51 is adjusted by tightening or loosening the four tilting adjustment hubs 13, respectively. When the tilting adjustment hub 13 is rotated, the liquid crystal panel fixing pin ( The tilting state of the liquid crystal panel 51 is adjusted while the liquid crystal panel 51 is pulled or pushed by screwing with 12).

At this time, the damper 11 is compressed or expanded in accordance with the control of the liquid crystal panel 51 to support the liquid crystal panel 51, the liquid crystal panel 51 is due to the elasticity of the damper 11 Since the liquid crystal panel 51 is firmly elastically supported, the liquid crystal panel 51 is not shaken by vibration or the like, thereby preventing the focus from being changed.

When the tilting state of the liquid crystal panel 51 is adjusted, the rotational position of the liquid crystal panel 51 with respect to the X axis is adjusted. When the adjusting screw 22 is tightened or loosened, the roller 17 is removed. As the center of the bracket 4 is rotated left and right to adjust the rotation angle.

When the rotation angle is adjusted, the position of the liquid crystal panel 51 with respect to the horizontal plane is adjusted. As shown in FIG. 5, the hub 10 fixed by the rotation pin 8 is rotated.

When the hub 10 is rotated, since the rotating pin 8 is deflected at the center of the hub 10, the upper plate 2 moves according to the rotation of the hub 10.

That is, when one hub 10 is rotated, the upper plate 2 moves left and right according to the rotation of the hub 10, and when the other hub 10 is rotated, the upper plate 2 is rotated. By moving back and forth, the position of the upper plate 2 is adjusted by rotating the two hubs 10 described above.

Of course, since the upper plate 2 is guided by the fixing pin 7 when the upper plate 2 moves by the hub 10, the upper plate 2 moves to move only in the front-back direction or the left-right direction, respectively. This is to be maintained.

Here, when the hub 10 for moving the upper plate 2 in the front and rear directions is rotated, the liquid crystal panel 51 is moved in the front and rear directions with respect to the X prism 54. The focus of the light reflected from the liquid crystal panel 51 is adjusted.

As described above, the liquid crystal panel 51 can be adjusted in the 6-axis direction so as to adjust all the factors affecting the miss convergence of the screen through a very compact adjustment device.

As described above, the present invention provides a liquid crystal panel on the lower, upper plate, support rail and bracket, which are manufactured in a very compact manner, and adjusts the front, rear, left, right, and rotation and tilt states of the liquid crystal panel by tilting means and horizontal driving means. In addition, there is an advantage that can simplify the configuration of the liquid crystal beam projector and facilitate the adjustment of the liquid crystal panel.

Claims (5)

The upper plate is formed between a fixed lower plate, an upper plate positioned on an upper surface of the lower plate and movable in front, rear, left and right, and the lower and upper plates. A horizontal drive means for adjusting focus by moving, a support rail fixed to the upper plate in a horizontal direction, and a rolling means positioned on an upper surface of the support rail and rotatably rolling about an X axis. The liquid crystal alignment device for a liquid crystal beam projector comprising: a rectangular plate-like bracket, and a reflective liquid crystal panel coupled to the bracket by tilting means and configured to adjust an inclination angle about an X axis. The method of claim 1, The horizontal drive means is fixed to the fixing hole of the lower plate and the other end is fixed to the guide pin formed in the four corners of the upper plate, and the eccentric fixed by the rotation pin so as to be rotatable to the lower plate A liquid crystal aligning device for a liquid crystal beam projector, comprising: an adjusting hub inserted into a rectangular working hole formed in an upper plate and configured to move the upper plate forward, backward, left, and right when rotating. The method according to claim 1 or 2, The tilting means is located between the liquid crystal panel and the bracket and is configured to be spaced apart by a predetermined interval and four dampers of soft material, and the liquid crystal panel fixing pin for fixing the penetrating through the liquid crystal panel and the four dampers, respectively, the bracket And four tilting adjustment hubs screwed to the liquid crystal panel fixing pin and positioned on the rear surface of the bracket. The method of claim 3, wherein The damper includes a through hole through which the liquid crystal panel fixing pin penetrates, and a groove formed in the outer diameter and the inner diameter to soften the contraction and expansion of the damper. The method according to claim 1 or 2, The rolling means includes a support groove formed in the center portion of the support rail, a roller inserted into the support groove so as to adjust the left and right angles of the bracket, protruding from both ends of the bracket, and a screw hole formed in the support rail. Liquid crystal alignment device for a liquid crystal beam projector, characterized in that the flange is formed with an adjusting groove so as to correspond, and the screw head is positioned in the adjusting groove and the adjusting screw which is screwed to the screw hole to move the bracket during rotation. .