JPH07152011A - Adjusting mechanism for liquid crystal panel of liquid crystal projector - Google Patents

Abstract

PURPOSE:To facilitate the adjustment of a liquid crystal panel in a three- dimensional direction. CONSTITUTION:A 1st adjusting bar 4 and a 2nd adjusting bar 8 are laid on the supporting piece 20 of a panel unit 3. The screw part 81 of the 2nd adjusting bar 8 is screwed in the screw hole 50 of a supporting bracket 5. The 1st adjusting bar 4 is equipped with a barrel shaft 4a and projecting shafts 40 and 40 projected eccentrically from the end face of the barrel shaft 4a to the barrel shaft 4a, and one projecting shaft 40 is fitted in the supporting bracket 5. The other projecting shaft 40 is fitted in a rotation adjusting plate 7 sliding up and down in contact with a supporting bracket 6. The adjustment in the right-and-left and up-and-down directions is performed by rotating the 2nd and the 1st adjusting bars 8 and 4, and the adjustment in a rotating direction is performed by rotating a rotation adjusting pin and sliding the plate 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adjusting mechanism for setting a liquid crystal panel provided in a liquid crystal projector mainly used for business such as high definition theater to an appropriate position.

[0002]

2. Description of the Related Art As such a liquid crystal projector, one shown in FIG. 11 is known. The optical system in the projector body (10) allows the light from the light source (11) to pass only the visible light through the filter (12), and the dichroic mirrors (13), (13) and (13) allow the red light (R) and the green light to pass. Light (G) and blue light (B)
Separate into (R) (G) (B). Separated three primary color lights (R) (G)
After passing through the condenser lenses (14), (14) and (14), (B) superimposes the image signal on each primary color light by the liquid crystal panel (1), (1) and (1), and the dichroic mirror (15) ( By 15), the three primary color lights (R), (G), and (B) on which the images are superimposed are combined, and the combined light is projected by the projection lens unit (16) to form an image on the screen (17).

Here, if the positions of the liquid crystal panels (1), (1) and (1) deviate from the predetermined positions, the images cannot be properly superimposed on the respective primary color lights, and the screen (17) is displayed. The projected image may be misaligned or blurred. Therefore, after the liquid crystal panels (1), (1) and (1) are once attached to the projector body (10), position adjustment is performed and the liquid crystal panels (1), (1) and (1) are accurately set at predetermined positions. For the actual adjustment, turn on the light source (11),
Adjust while displaying the image on the screen (17).

10 (a) and 10 (b) show a conventional adjusting mechanism.
The X axis, which is the direction perpendicular to the liquid crystal panel (1) surface, that is, the optical axis direction is the front-rear direction, the Y axis along the liquid crystal panel surface is the horizontal direction, and the Z axis is the vertical direction. Further, the condenser lens and the like are omitted. A support bracket (100) is attached inside the projector body by screws (103) (103). From the top edge of the support bracket (100),
The panel unit (3) is provided below the horizontal plate (101). The horizontal plate (101) has long holes (102) (102) that are long in the left and right, and adjustment screws (110) (111) are long holes (102) (102) from above the horizontal plate (101). Penetrates through. The adjustment screws (110) and (111) are screwed onto the upper end of the panel unit (3), and the compression spring (112) is attached to the screw portion of each adjustment screw (110).
Is wrapped around. The upper end of the panel unit (3) is fixed to the support bracket (100) with a fixing screw (120).

An eccentric pin (130) having a slit (131) at its tip end projects from the upper surface of the panel unit (3). The eccentric pin (130) is eccentric in the front-rear direction, and its tip portion penetrates the horizontal plate (101). Adjustment is left / right, up / down and X
This is done about the rotation direction around the axis. Prior to adjustment, lightly tighten the fixing screw (120). For adjustment in the left-right direction, a jig is inserted into the slit (131) of the eccentric pin (130) and the eccentric pin (130) is rotated. The panel unit (3) has a long hole (10
Move left and right along 2). For adjustment in the vertical direction, the adjustment screws (110) and (111) are rotated. The panel unit (3) moves up and down and tightens the fixing screw (120) at a predetermined position.
For the adjustment of the rotation direction, for example, the adjustment screw (110) is fixed and the adjustment screw (111) is rotated. The panel unit (3) rotates facing the front of the panel unit (3) around the screwed portion with the adjustment screw (110). By the urging force of the compression spring (112),
The panel unit (3) rotates smoothly. After adjusting the above directions, tighten the fixing screw (120).

[0006]

In the conventional method, it is necessary to adjust the panel unit (3) by adjusting screws (110) and (111) in the vertical and rotational directions at the same time. . Therefore, adjustment requires skill and takes a long time for adjustment. An object of the present invention is to provide a mechanism capable of independently adjusting a panel unit in a direction orthogonal to a liquid crystal panel surface and in two directions orthogonal to the direction.

[0007]

[Means for Solving the Problems] The adjusting mechanism is a liquid crystal panel.
Supports the first adjusting rod (4) and the second adjusting rod (8) arranged on both sides of the panel unit (3) to which (1) is attached, and the ends of both adjusting rods (4) and (8) Support brackets (5) (6)
Equipped with. The projecting shafts (40) (40) are eccentrically provided from the tip end surface of the first adjusting rod (4), are allowed to move in the X-axis direction, and are restricted from moving in the Z-axis direction. The second adjusting rod (8) is restricted from moving in the X-axis direction and the Y-axis direction, and has a threaded portion (81) formed at one end, and the threaded portion (81) is screwed into the support bracket (5). The support bracket (6) is fitted with the shaft portion of the rotation adjusting pin (9) with the head portion (90) being eccentric, and the protruding shaft (4) of the first adjusting rod (4).
(0) is fitted, and the protrusion shaft (40) is moved in the Z-axis direction by being linked to the rotation of the head (90) of the rotation adjusting pin (9) and sliding in contact with the support bracket (6). A rotation adjusting plate (7) is provided.

[0008]

When the protruding shaft (40) is rotated, the protruding shaft (40) is eccentric with respect to the first adjusting rod (4), so that the panel unit (3) to which the first adjusting rod (4) is attached is , Move in the Z-axis direction. When the second adjusting rod (8) is rotated, the screw part (81) rotates in the screw hole (50), so that the panel unit (3) to which the second adjusting rod (8) is attached is moved in the Y-axis direction. Moving. Furthermore, when the head (90) of the rotation adjusting pin (9) is rotated and the rotation adjusting plate (7) is slid, the protruding shaft of the first adjusting rod (4)
Since the (40) slides in the Z-axis direction, the first adjusting rod (4) rotates around the fitting portion between the support bracket (5) and the first adjusting rod (4).

[0009]

The panel unit (3) includes the first adjusting rod (4).
Is rotated to move in the Z-axis direction, and the second adjusting rod (8) is rotated to move in the Y-axis direction. When the rotation adjusting plate (7) is slid, one end of the first adjusting rod (4) slides in the Z-axis direction, and the other end of the first adjusting rod (4) slides on the support bracket.
Since it is fitted in (5), the first adjusting rod (4) is the liquid crystal panel.
(1) Rotate on a plane substantially parallel to the plane. Therefore, the adjustment in each direction can be performed independently, which simplifies the adjustment and can be performed in a short time.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. In addition, in the following description, the liquid crystal panel
The X-axis direction, which is the optical path direction incident on (1), is the front-rear direction, the Y-axis direction is the left-right direction, and the Z-axis direction is the up-down direction.
Further, the display surface side of the liquid crystal panel (1) is referred to as the front. As shown in FIG. 1, a panel holder (2) is provided. Panel holder
(2) One side portion forms a step portion (24) toward the front, and the support pieces (20) and (20) project rearward from the inside of the step portion (24). A liquid crystal panel (1) is attached to the front surface of the panel holder (2), and a deflector (not shown) and a condenser lens (14) are provided on the opposite side of the panel holder (2).
Are attached to form a panel unit (3) as a whole.

As shown in FIG. 2, a pair of chassis pieces (31) and (31) are provided between the step portion (24) and the support piece (20) substantially orthogonal to the surface of the liquid crystal panel (1). Has been. A leaf spring (30) is provided at the upper front portion of each chassis piece (31), and the leaf spring (30) biases the panel unit (3) backward. The panel unit (3) is biased by the leaf spring (30) and pressed against the stoppers (32) (32) of the chassis piece (31).

At the upper end of the support pieces (20) (20), there is a second adjusting rod.
(8) and the first adjusting rod (4) are installed. Second adjusting rod
As shown in FIG. 4, (8) is a body shaft (8a), a shaft (80) projecting concentrically from the body shaft (8a) from one end surface of the body shaft (8a), and a body shaft (8).
The screw part (81) protruding from the other end face of a) is integrally formed. A slit (82) is provided on the tip surface of the shaft (80). Slit grooves (83) and (83) are provided around both ends of the body shaft (8a), and the slit grooves (83) are provided on the support piece (2
Fit in the notch (22) in (0). By this, the second adjusting rod
Although the movement of (8) is restricted in the left-right and front-rear directions, it can move in the upward direction.

The first adjusting rod (4) is provided in front of the second adjusting rod (8). As shown in FIG. 3, the first adjusting rod (4) is integrally formed with a barrel shaft (4a) and a protruding shaft (40) eccentrically protruding from the both end faces of the barrel shaft (4a) to the barrel shaft (4a). is doing. A slit (41) is provided on the tip surface of one of the salient shafts (40). As shown in Fig. 1, both ends of the body shaft (4a) are provided with support pieces.
It fits in the openings (23) and (23) of the (20). The trunk (4a) is open
(23) is fitted with a margin in the front-rear direction, and the support piece (2)
The upward movement is restricted by the protruding piece (21) protruding inward from the upper end of the opening (23) (see FIG. 9). Shaft (80) of second adjusting rod (8), screw part (81) and protruding shaft of first adjusting rod (4)
The (40) and (40) face the support brackets (5) and (6) provided on the sides of the support pieces (20) and (20), respectively.

The support bracket (5) has screw holes (50) and holes (5
1) is opened, and the screw part (81) of the second adjusting rod (8) is the screw hole.
Screw to (50). One protruding shaft (40) of the first adjusting rod (4) is a hole
Fits in (51). The rotation adjusting plate (7) is attached to the inner surface of the support bracket (6) in contact therewith. As shown in FIG. 5 (a), the rotation adjusting plate (7) is L-shaped and has two through holes (70) (70) at the upper end thereof. On the support bracket (6), the opening (6
0) is formed.

Below the through holes (70) (70) of the rotation adjusting plate (7), there are formed long holes (71) extending in the front-rear direction. The position corresponding to the long hole (71) on the support bracket (6) is shown in FIG.
As shown in (b), the hole (61) is opened, and the hole (61) and the long hole are formed.
The rotation adjusting pin (9) is fitted in (71). As shown in FIG. 6, the rotation adjusting pin (9) integrally includes a head (90) and a shaft (91) eccentric to the head (90). A slit (92) is provided at the tip of the shaft (91). As shown in FIG. 5 (b),
The shaft (91) fits into the hole (61) and the head (90) fits into the long hole (71). The outer diameter of the head (90) matches the vertical width of the long hole (71), and the rotation adjusting pin (9) has a washer (Fig. (Not shown) is fitted to prevent it from coming off.

From the end of the rotation adjusting plate (7), a protrusion
(72) and (72) are projected toward the support bracket (6). The protrusions (72) (72) are fitted in the guide holes (62) (62) opened up and down in the support bracket (6), and the rotation adjusting plate
(7) can slide up and down. The rotation adjusting plate (7) is attached to the support bracket (6) with screws or the like, but this is a known technique and will not be described. As shown in FIG. 2, the first adjusting rod facing the support bracket (6)
The protruding shaft (40) of (4) and the shaft (80) of the second adjusting rod (8) are fitted into the through holes (70) and (70), respectively. The protruding shaft (40) penetrates the opening (60) of the support bracket (6). The support brackets (5) and (6) are attached to the chassis pieces (31) and (31), and the panel unit (3) is attached to the chassis pieces (31) and (31).

(Position Adjustment) After the panel unit (3) is attached to the chassis piece (31), the attachment position is adjusted. Position adjustment in each direction is performed as follows. (Adjustment in the left-right direction) As shown in FIG. 7, the jig (85) is inserted into the slit (82) of the second adjusting rod (8) to adjust the second adjusting rod (8).
To rotate. The jig (85) is composed of, for example, a so-called minus driver. Since the screw portion (81) is screwed into the screw hole (50) of the support bracket (5), when the second adjusting rod (8) is rotated, the second adjusting rod (8) provided with the screw portion (81) is 8) moves left and right. The slit groove (83) of the second adjusting rod (8) fits into the support piece (20), and the shaft (80) of the second adjusting rod (8) has the through hole (70) of the rotation adjusting plate (7). ), The panel unit (3) moves left and right.

(Adjustment of Rotation Direction) First, as shown in FIG.
A jig (not shown) is inserted into the slit (92) of the shaft (91) of the rotation adjusting pin (9), and the rotation adjusting pin (9) is rotated about the hole (61). The outer diameter of the head (90) of the rotation adjusting pin (9) is in contact with the upper and lower ends of the elongated hole (71), and the shaft (91) is eccentric with respect to the head (90). By rotating the
(90) and the rotation adjusting plate (7) move up and down along the guide hole (62).

When the rotation adjusting plate (7) moves upward, the protruding shaft (40) of the first adjusting rod (4) fitted in the through hole (70) shown in FIG. 1 rises. The other salient shaft (40) is the support bracket (5)
Since it is supported by the first adjusting rod (4), the first adjusting rod (4) rotates about the fitting portion between the protruding shaft (40) and the support bracket (5). Since the first adjusting rod (4) is restricted from moving upward by the projecting piece (21) of the supporting piece (20), the supporting piece (20) and the panel unit (3) are centered on the fitting portion. Rotate (see Figure 8). The second adjusting rod (8) also rotates upward, but the notch of the support piece (20)
It does not reach the point where it is disengaged from (22). Further, the shaft (80) of the second adjusting rod (8) is displaced, so that strain stress is applied to the screw portion (81), but since the adjustment amount is generally small, the screw portion (81) is It does not deform.

(Vertical adjustment) The protruding shaft (4
Insert the jig into the slit (41) of 0) and rotate the first adjusting rod (4). As shown in FIG. 9, the protruding shaft (40) is the first adjusting rod.
Since it is eccentric with respect to (4), when the protruding shaft (40) is rotated, the first adjusting rod (4) causes the protruding shaft (40) and the support bracket (5) to move.
It tries to swing around the fitting part with (6). First adjusting rod
The support piece (20) fitted with the body shaft (4a) of (4) and the panel unit (3) also try to swing around, but as described above, the panel unit (3) is attached to the chassis piece by the leaf spring (30). The first adjusting rod is urged by the stoppers (32) and (32) of (31)
Since (4) is fitted into the opening (23) of the support piece (20) with a sufficient margin in the front-rear direction, the panel unit (3) does not move in the front-rear direction. Therefore, the panel unit (3) moves vertically with the support piece (20) in contact with the stopper (32), and
The back focus distance BF from the liquid crystal panel (1) to the projection lens unit (16) shown in 1 does not shift. Incidentally, after adjusting the above-mentioned respective directions, a known screw locking agent is applied to the protruding shaft (40),
It is common practice to coat the shaft (80) and the rotation adjustment pin (9) so that the adjustment position does not shift.

As described above, by rotating the first adjusting rod (4) and the second adjusting rod (8), the panel unit (3) can be adjusted vertically and horizontally, and the rotation adjusting plate (7) can be adjusted. Is moved up and down to rotate the panel unit (3) around the fitting portion with the support bracket (5). That is,
Up and down, left and right, rotation direction can be adjusted independently,
Easy and quick adjustment.

The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or limiting the scope. The configuration of each part of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made within the technical scope described in the claims.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a panel unit and a support bracket.

FIG. 2 is a perspective view of a panel unit with a chassis piece attached thereto.

FIG. 3 is a perspective view of a first adjusting rod.

FIG. 4 is a perspective view of a second adjusting rod.

5A is a side view of the state in which the rotation adjusting plate of the support bracket is attached, as seen from the inside, and FIG. 5B is a side view as seen from the outside.

FIG. 6 is a perspective view of a rotation adjusting pin.

FIG. 7 is a front view of a panel unit and a support bracket.

FIG. 8 is a front view showing a state in which the panel unit is rotationally adjusted.

FIG. 9 is a side view showing a part of a panel unit and a chassis piece.

10A is a plan view of a conventional adjusting mechanism, and FIG. 10B is a front view of the same.

FIG. 11 is a side view showing the inside of the projector body.

[Explanation of symbols]

 (1) Liquid crystal panel (3) Panel unit (4) First adjusting rod (8) Second adjusting rod

Claims (1)

[Claims] 1. An adjusting mechanism for setting a liquid crystal panel (1) provided in a projector body (10) at a predetermined position, wherein a direction substantially orthogonal to the liquid crystal panel (1) plane is defined as an X-axis direction, and X
The Y-axis and Z-axis directions are the two axis directions orthogonal to the axis, and are installed on both sides of the panel unit (3) to which the liquid crystal panel (1) is attached, and the movement in the X-axis direction is allowed.
The first adjusting rod (4), which is restricted from moving in the axial direction and has the protruding shafts (40) and (40) eccentric from both end surfaces, and is installed on both sides of the panel unit (3), and also in the X-axis direction. And a second adjustment rod (8) whose movement in the Y-axis direction is restricted and which has a threaded portion (81) at one end, and a support bracket (5) which supports the ends of both adjustment rods (4) and (8).
(6), the one support bracket (5), the screw part of the second adjusting rod (8)
A screw hole (50) into which (81) is screwed is opened, and a shaft portion of a rotation adjusting pin (9) with an eccentric head portion (90) is fitted to the other support bracket (6). First
The protruding shaft (40) of the adjusting rod (4) is fitted, and the protruding shaft (40) is connected to the rotation of the head of the rotation adjusting pin (9) and slid in contact with the support bracket (6). An adjusting mechanism characterized in that a rotation adjusting plate (7) for moving in the Z-axis direction is provided.