JPH0536422U - Jig for LCD panel alignment adjustment - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To simplify the mechanism of the liquid crystal panel holding portion of a liquid crystal projector having three liquid crystal panels. [Structure] In an alignment adjusting jig 20 of a liquid crystal panel of a liquid crystal projector which synthesizes and projects R, G, and B images, the jig 20 is movable in X and Y directions with respect to a fixed member 22 and rotates in an XY plane. Adjusting screws 26, 28, 29 arranged between the fixed member 22 and the movable member which are freely arranged and which move the movable member in the X and Y directions and rotate in the XY plane. When the alignment of the liquid crystal panel is adjusted, the fixing member 22 and the moving member are respectively fixed to the bracket 10 fixed on the base plate and the liquid crystal mounting plate 12 fixed to the bracket 10 via the fixing screw 14. The adjustment screws 26, 28 and 29 are fixed, and the liquid crystal mounting plate 12 is rotated relative to the bracket 10 in the X and Y directions and in the XY plane. Position to adjust.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a jig for alignment adjustment of a liquid crystal panel, and in particular, a liquid crystal projector that obtains a color image by synthesizing R, G, B images transmitted through three R, G, B liquid crystal panels. Jig for LCD panel alignment adjustment.

[0002]

[Prior Art]

 FIG. 4 is a conceptual diagram showing an example of a dichroic mirror type liquid crystal projector. As shown in the figure, the light emitted from one light source (metal halide lamp or the like) L is totally reflected by the cold mirror CM and is incident on the dichroic mirror DM1 via the UV-IR cut filter F.

The dichroic mirror DM1 reflects only green (G) light of incident light and transmits red (R) and blue (B) light. The G light reflected by the dichroic mirror DM1 enters the liquid crystal panel LCD1 for G through the aluminum mirror AM1. On the other hand, the R and B lights that have passed through the dichroic mirror DM1 are incident on the dichroic mirror DM2, where the R light is reflected and enters the R liquid crystal panel LCD2, and the B light is transmitted and passed to the B light. Is incident on the liquid crystal panel LCD3.

The R, G, and B images displayed by each liquid crystal panel are illuminated by the R, G, and B lights that have been color-divided, respectively, and are combined by the aluminum mirror AM2 and the combining system dichroic mirrors DM3 and DM4. Then, a color image is projected through the projection lens 1. By the way, in order to obtain a good color image, it is necessary to adjust the alignment of each liquid crystal panel so that the R, G, and B images match.

In the conventional alignment adjustment of this type of liquid crystal panel, two of the R, G, and B liquid crystal panels are held by a liquid crystal panel holding unit having an alignment adjusting mechanism, and three liquid crystal panels are held. The two liquid crystal panels were adjusted by the alignment adjusting mechanism on the basis of one liquid crystal panel so that the images of the two liquid crystal panels coincided with each other. 5 and 6 are a front view and a left side view showing an example of a liquid crystal panel holding portion having a conventional alignment adjusting mechanism, respectively.

As shown in these drawings, the liquid crystal panel holding portion includes a bracket 2, an intermediate plate 3, a liquid crystal mounting plate 4, and Y and θ directions arranged between the intermediate plate 3 and the liquid crystal mounting plate 4. The adjusting screws 5 and 5 and the X-direction adjusting portion (not shown) arranged between the bracket 2 and the intermediate plate 3 are included. Incidentally, 7 is a liquid crystal panel, 8 is a fixing screw in the X direction, and 9 is a fixing screw in the Y and θ directions.

When the position of the liquid crystal panel 7 is adjusted by the liquid crystal panel holding portion having the above-described configuration, first, by rotating either one of the Y and θ direction adjusting screws 5, 5, the θ of the liquid crystal panel 7 is adjusted. Adjust the direction. Then, the Y and θ direction adjusting screws 5 and 5 are simultaneously rotated by the same amount to perform the Y direction adjustment. When these adjustments are completed, the intermediate plate 3 and the liquid crystal mounting plate 4 are fixed by the Y and θ direction fixing screws 9, 9.

Subsequently, after the liquid crystal panel 7 is adjusted in the X direction by an X direction adjusting unit (not shown), the bracket 2 and the intermediate plate 3 are fixed by the X direction fixing screw 8.

[0009]

[Problems to be solved by the device]

 However, since the above-mentioned conventional liquid crystal panel holding portion has three plate materials (bracket 2, intermediate plate 3, liquid crystal mounting plate 4) and an alignment adjustment mechanism between each plate material, the adjustment mechanism parts There were problems that the number of points increased and the cost increased and the weight and size increased.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a jig for alignment adjustment of a liquid crystal panel, which can simplify the mechanism of the liquid crystal panel holding portion. ..

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention illuminates three R, G, B liquid crystal panels arranged on a base plate with R, G, B lights, and transmits the R, G, B images. A jig for alignment adjustment of a liquid crystal panel in a liquid crystal projector that projects a color image obtained by synthesizing a fixed lens and a fixed member, and a jig that moves in the X and Y directions with respect to the fixed member. A movable member which is freely and rotatably arranged in the XY plane, and is arranged between the fixed member and the movable member to move the movable member in the X and Y directions and rotate in the XY plane. The fixing member and the moving member are composed of an adjusting member and the alignment member of the liquid crystal panel, and the fixing member and the moving member are fixed to the base plate and a fixing screw to the bracket, respectively. Is fixed to the liquid crystal mounting plate to be constant, it is characterized by adjusting the rotational position location of the X direction of the liquid crystal mounting plate for bracket, in Y-direction position and the XY plane by the adjusting member.

[0012]

[Action]

 According to the present invention, the alignment adjusting mechanism of the liquid crystal panel is provided in a dedicated jig, not in the liquid crystal panel holding portion, and the alignment is adjusted by using this jig at the time of adjustment. By removing it from the holding part, the mechanism of the liquid crystal panel holding part is simplified.

[0013]

【Example】

 Hereinafter, preferred embodiments of a jig for alignment adjustment of a liquid crystal panel according to the present invention will be described in detail with reference to the accompanying drawings. 1, 2, and 3 are a front view, a right side view, and a top view showing an embodiment of a liquid crystal panel including a liquid crystal panel holding portion and a dedicated jig for adjusting alignment according to the present invention. ..

As shown in these drawings, a liquid crystal panel holding portion to which a jig 20 according to the present invention is applied is a bracket 10 fixed on a base plate mainly made of aluminum die casting (not shown), and a bracket 10 attached to the bracket 10. On the other hand, it is composed of a liquid crystal mounting plate 12 which is adjusted and fixed in the X direction, the Y direction and the θ direction. By loosening the four fixing screws 14, the liquid crystal mounting plate 12 is moved relative to the bracket 10 in the X direction. Direction, Y direction and θ direction. A condenser lens 16 is arranged on the bracket 10 side, and a liquid crystal panel 18 is arranged on the liquid crystal mounting plate 12 side.

On the other hand, the jig 20 includes a jig fixing screw 21, a fixing member 22, a rotating member 23, a Y-direction moving member 24, an X-direction moving member 25, a θ-direction adjusting screw 26, a θ-direction fixing screw 27, X. It is composed of a direction adjusting screw 28, a Y direction adjusting screw 29, and a liquid crystal mounting plate clamp screw 30. The fixing member 22 is fixed on the bracket 10 by the jig fixing screws 21 and 21, and the rotating member 23 is arranged so as to be rotatable in the θ direction about the shaft 22A with respect to the fixing member 22 in the Y direction. The moving member 24 is disposed so as to be movable in the Y direction (vertical direction in FIG. 2) with respect to the rotating member 23, and the X direction moving member 25 is further arranged in the X direction (see FIG. 3) with respect to the Y direction moving member 24. It is arranged so as to be movable in the left-right direction).

The θ-direction adjusting screw 26 and the θ-direction fixing screw 27 are arranged between the fixing member 22 and the rotating member 23, and the θ-direction adjusting screw 26 is rotated with the θ-direction fixing screw 27 being loosened. By doing so, the rotating member 23 can be rotated around the shaft 22A with respect to the fixed member 22. The X-direction adjusting screw 28 is disposed between the Y-direction moving member 24 and the X-direction moving member 25, and the X-direction moving member 25 is rotated with respect to the rotating member 23 by rotating the X-direction adjusting screw 28. It can be moved in the X direction.

The Y-direction adjusting screw 29 is arranged between the rotating member 23 and the Y-direction moving member 24. By rotating the Y-direction adjusting screw 29, the Y-direction moving member 24 is moved with respect to the rotating member 23. Can be moved in the Y direction. Further, as shown in FIG. 2, the X-direction moving member 25 is integrally provided with a hook-shaped screw mounting member 31 and a clamp member 32. Further, the screw mounting member 31 has a liquid crystal mounting plate clamp screw 30. A clamp member 33 is provided which is screwed and moves forward and backward with respect to the clamp member 32 by the rotation of the liquid crystal mounting plate clamp screw 30.

Next, a method of adjusting the alignment of the liquid crystal panel by using the jig 20 having the above-described structure will be described. First, the fixing member 22 of the jig 20 is fixed on the bracket 10 which is the liquid crystal panel holding portion by the jig fixing screws 21 and 21. Then, the liquid crystal mounting plate clamp screw 30 is rotated to clamp the liquid crystal mounting plate 12 between the fixed clamp member 32 and the clamp member 33 which is moved by the liquid crystal mounting plate clamp screw 30 (see FIG. 2).

Next, the θ-direction adjusting screw 26 is rotated with the θ-direction fixing screw 27 being loosened, and the rotating member 23 is rotated with respect to the fixing member 22 about the shaft 22A. The liquid crystal mounting plate 12 with respect to 10 is adjusted in the θ direction. When the adjustment in the θ direction is completed, the rotating member 23 is fixed so as not to be rotatable by the θ direction fixing screw 27.

After that, by appropriately rotating the X direction adjusting screw 28 and the Y direction adjusting screw 29, the X direction moving member 25 is moved in the X direction with respect to the rotating member 23, and the Y direction moving member 24 is moved. By moving in the Y direction, the liquid crystal mounting plate 12 with respect to the bracket 10 is adjusted in the X and Y directions. When the adjustment of the liquid crystal mounting plate 12 with respect to the bracket 10 in the θ direction, the X direction, and the Y direction is completed in this manner, the liquid crystal mounting plate 12 is fixed to the bracket 10 by the four fixing screws 14, and then the jig 20 is used. Remove.

The structure of the jig is not limited to this embodiment, and any structure can be used as long as the liquid crystal mounting plate 12 with respect to the bracket 10 can be adjusted in the θ direction, the X direction and the Y direction.

[0022]

[Effect of the device]

 As described above, according to the liquid crystal panel alignment adjusting jig of the present invention, the liquid crystal panel alignment adjusting function is provided in the dedicated jig instead of in the liquid crystal panel holding portion. Therefore, the liquid crystal panel holding part can be configured only with the bracket, the liquid crystal mounting plate, and the fixing screws that fix the two, and the number of parts of the liquid crystal panel holding part can be significantly reduced, resulting in cost reduction and weight, You can also reduce the size.

[Brief description of drawings]

FIG. 1 is a liquid crystal panel including a liquid crystal panel holder,
FIG. 3 is a front view showing an embodiment of a dedicated jig for alignment adjustment according to the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a top view of the jig shown in FIG.

FIG. 4 is a conceptual diagram showing an example of a dichroic mirror type liquid crystal projector.

FIG. 5 is a front view showing an example of a conventional liquid crystal panel holding unit having a conventional alignment adjustment mechanism.

FIG. 6 is a left side view of FIG.

[Explanation of symbols]

 10 ... Bracket 12 ... Liquid crystal mounting plate 14 ... Fixing screw 18 ... Liquid crystal panel 20 ... Jig 21 ... Jig fixing screw 22 ... Fixing member 23 ... Rotating member 24 ... Y-direction moving member 25 ... X-direction moving member 26 ... θ Direction adjusting screw 27 ... θ direction fixing screw 28 ... X direction adjusting screw 29 ... Y direction adjusting screw 30 ... Liquid crystal mounting plate clamp screw 31 ... Screw mounting member 32, 33 ... Clamping member

Claims (1)

[Scope of utility model registration request] 1. R, G, arranged on a base plate
A liquid crystal projector that illuminates three liquid crystal panels for B with R, G, and B lights and projects a color image obtained by combining the R, G, and B images transmitted through the liquid crystal panels through a projection lens. A jig for alignment adjustment of a liquid crystal panel, comprising: a fixed member, a movable member that is movable in the X and Y directions with respect to the fixed member, and is rotatable in an XY plane; And an adjusting member which is arranged between the member and the moving member to move the moving member in the X and Y directions and to rotate in the XY plane. The members are fixed to a liquid crystal holding bracket fixed on the base plate and a liquid crystal mounting plate fixed to the bracket via fixing screws, respectively, and are adjusted by the adjusting member. X direction of the liquid crystal mounting plate for serial bracket,
A jig for alignment adjustment of a liquid crystal panel, which adjusts a position in the Y direction and a rotational position in an XY plane.