JPH1039270A - Convergence mechanism and convergence method for liquid crystal projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a convergence mechanism which can deal with the high definition of liquid crystal panel and the miniaturization of set, and whose space is saved, whose operation is satisfactory, and which has a high adjusting accuracy. SOLUTION: In the convergence mechanism 32 with which the position of the panel display part 31 of a liquid crystal display panel member 30 in a liquid crystal projector is adjusted, supporting piece parts 3b, 2b having a screw hole part 33 with which a common screw part 5 can be simultaneously engaged and whose center axial lines 0 coincide each other are provided on the fixing frame 1 of a liquid crystal display panel member 30 and an adjusting frame 3 incorporating a panel display part 31 and the adjusting screw 5 is inserted through the screw hole part 33 is both supporting piece parts 3b, 2b. Moreover, an elastic member 4 is provided in between the supporting piece parts 3b, 2b so that a bias force is applied along the axial center line 0 of the adjusting screw 5 with respect to respective supporting piece parts 3b, 2b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a convergence mechanism and a convergence method for adjusting the positions of panels in a liquid crystal projector or the like using a plurality of liquid crystal panels.

[0002]

2. Description of the Related Art In a liquid crystal projector using a combination of a plurality of liquid crystal panels, such as a color liquid crystal projector, in order to display an appropriate color, the position of each pixel of each liquid crystal display panel is appropriately adjusted (convergence). Adjustment). The accuracy required for the convergence adjustment has been further increased with the increase in the definition of the liquid crystal display panel. For this reason, various adjustment mechanisms have been proposed and put into practical use.

For example, as a convergence mechanism used in a conventional liquid crystal projector, Japanese Utility Model Laid-Open No. 5-1 has been proposed.
No. 5035 is known. FIG. 7 shows an example of the configuration of such a conventional convergence mechanism. That is, in the prior art,
An adjustment screw 18 is provided to adjust and move the adjustment plate 16 to which the liquid crystal panel 15 is attached with respect to the fixed plate 14, and an urging spring 17 is provided to eliminate backlash of the adjustment screw 18.

Here, the adjusting screw 18 is attached to the fixing plate 14.
Into the screw holes provided on the side surfaces of the
4, the position of the adjustment plate 16 is adjusted. Further, two adjustment screws 18 and two biasing springs 17 are provided below the fixed plate 14 so that the rotation direction can be adjusted in the panel plane.

[0005]

A first problem in the above prior art is that the movement of the adjusting plate with respect to the adjusting screw is not smooth. That is, as shown in FIG. 7, when a spring having a mechanism having two springs and two adjustment screws is attached to a place not coaxial with the adjustment screw, an unnecessary moment is applied to the adjustment screw. is there. This tendency becomes more remarkable due to variations in the screw mounting position and the spring force.

[0006] The second problem is that the size of the apparatus becomes large. That is, in the above-described conventional technique, a place for stopping a spring for urging the adjustment plate against the adjustment screw must be newly provided, and prevention of the falling off must be considered. It is. Further, the third problem is that it is difficult to cope with automation because the adjustment mechanism is complicated.

That is, in this conventional example, the screw holes are cut in the fixed frame, so that the position of the head of the adjustment screw moves together with the adjustment plate during adjustment. Thus, it is necessary to provide a mechanism that follows the movement of the head of the screw on the adjustment driver side of the automatic adjuster.
As an example of a conventional method of adjusting a liquid crystal display panel, as shown in JP-A-6-29872, a liquid crystal display panel is gripped from its outer periphery and the liquid crystal display panel is fixed to a predetermined frame. There is disclosed a liquid crystal display panel position adjusting jig, which uses a pressing mechanism using a spindle mechanism and a spring member provided on the opposite side thereof. The method of adjusting the position with respect to the frame is shown, but also in this method, there is a problem that the mechanism is complicated and the size is increased, and the method is also accurate due to occurrence of backlash or generation of an unnecessary moment. In addition, it has been difficult to perform position adjustment in a minute range.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the above-mentioned disadvantages of the prior art and to adopt a simple structure to eliminate the backlash of the adjusting screw portion and to prevent the adjusting frame from being slightly moved with respect to the fixed frame. An object of the present invention is to provide a convergence mechanism and a convergence method for a liquid crystal display panel which can be performed.

[0009]

The present invention employs the following technical configuration to achieve the above object. That is, as a first mode according to the present invention, in a liquid crystal projector configured by combining a plurality of liquid crystal display panel members arranged independently of each other, a panel display portion of each liquid crystal display panel member is provided. A convergence mechanism provided on each liquid crystal display panel member for adjusting a position with respect to a panel display portion of another liquid crystal display panel member, wherein the convergence mechanism is a fixed convergence mechanism provided on the liquid crystal display panel member. A common screw part is simultaneously fitted to the frame and at least one adjustment frame having a built-in panel display unit, and the adjustment frame and a fixed frame or another adjustment frame not having a panel display unit. Support pieces having screw hole portions whose central axes are coincident with each other are provided, and the support pieces in both the support pieces are provided. A common adjusting screw is inserted through the through hole, and a predetermined biasing force is applied to each of the supporting pieces along the axis of the adjusting screw between the supporting pieces. A second aspect is a liquid crystal projector comprising a combination of a plurality of liquid crystal display panel members arranged independently of each other. A convergence method for adjusting a position of a panel display portion of each liquid crystal display panel member with respect to a panel display portion of another liquid crystal display panel member, wherein a fixed frame provided on the liquid crystal display panel member is provided. A first adjustment frame incorporating a panel display unit and a second adjustment frame not incorporating a panel display unit engaged with the fixed frame and the first adjustment frame. By rotating the adjusting screw inserted through the screw hole of the support piece having the screw hole whose central axis coincides with each other, the common screw can be fitted at the same time. , Which incorporates a panel display unit,
Is slid relative to the fixed frame or the second adjustment frame, and the direction of relative movement between the first adjustment frame and the fixed frame by the adjustment screw between the two support pieces is opposite. This is a convergence method of moving the first adjustment frame in a predetermined direction and a predetermined distance while applying a bias force in the direction.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a convergence mechanism for a liquid crystal display panel or the like according to the present invention, in order to solve the above problem, an elastic member including an urging spring is provided coaxially with the adjusting screw to reduce the backlash of the adjusting screw. This eliminates unnecessary moments applied to the adjustment screw and the adjustment screw, so that the adjustment-side plate moves smoothly in response to the movement of the adjustment screw, and at the same time, prevents the biasing spring from falling off.

More specifically, an adjusting frame for moving the liquid crystal panel, an urging spring applied between operating points of adjusting screws for adjusting the position of the fixed plate to be moved, and a dropping of the urging spring. In order to prevent this, an adjustment screw is provided to pass through the support hole of the biasing spring. Further, by having two adjustment screws in the same direction and having a biasing spring between the action points of both adjustment screws, the adjustment frame can be rotated with respect to the fixed frame.

Further, by providing a screw hole for an adjustment screw in the adjustment plate, the adjustment frame incorporating the liquid crystal display panel can be integrated with the fixed frame or the fixed frame only by rotating the adjustment screw. It is possible to move and adjust relative to an adjustment frame that does not have a built-in liquid crystal display panel.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an outline of a convergence mechanism and a convergence method in a liquid crystal display panel according to the present invention will be described in detail with reference to the accompanying drawings. 1 to 5 show one specific example of a convergence mechanism in a liquid crystal projector according to the present invention. In the drawings, a plurality of liquid crystal display panel members 30 arranged independently of each other are combined. In the liquid crystal projector thus configured, each liquid crystal display for adjusting the position of the panel display section 31 of each liquid crystal display panel member 30 with respect to the panel display section 31 'of another liquid crystal display panel member 30'. Convergence mechanism 32 provided on panel member 30
The convergence mechanism 32 includes a fixed frame 1 provided on the liquid crystal display panel member 30 and at least one adjustment frame (first adjustment frame) 3 having the panel display unit 31 therein. In addition, the adjustment frame 3 and the fixed frame 1 or another adjustment frame (second adjustment frame) 2 which does not incorporate the panel display unit 31 have a central axis line to which a common adjustment screw part 5 can be simultaneously fitted. Support pieces 3b and 2b each having a screw hole 33 where O coincides with each other are provided, and a common adjustment screw 5 is inserted through the screw holes 33 in both support pieces 3b and 3c. , The support piece 3b
And an elastic member 4 is provided between the support pieces 3b and 2b along the axial center line O of the adjusting screw 5 so as to apply a predetermined bias force to the support pieces 3b and 2b. Is shown.

In the convergence mechanism of the liquid crystal display panel member 30 according to the present invention, as described above, since the elastic member 4 such as the urging spring is hung between the operating points of the adjusting screw 5, Since the occurrence of backlash of the adjusting screw portions 5 is prevented and unnecessary moment is not generated for each adjusting screw portion 4, the adjusting frame 3 does not incorporate the fixed frame 1 or the liquid crystal display panel 31. To move smoothly with respect to the other adjustment frame 2,
Precise adjustments can be made.

Further, in the present invention, since the elastic member 4 is prevented from dropping off by the adjusting screw portion 5, it is not necessary to lock a spring or the like, so that the apparatus can be downsized. Further, in the present invention, the liquid crystal display panel itself can be rotated and its rotation can be achieved by disposing the elastic members 4 on the two adjustment screw portions 5 in the same adjustment direction as described above. The operation is smoother and precise adjustments can be made.

On the other hand, in the present invention, support pieces 3b and 2b each having a screw hole 33 into which the above-mentioned adjusting screw 5 can be simultaneously fitted are provided on the side of the adjusting frame to be adjusted. Therefore, even if the adjustment screw portion 5 is turned, the adjustment frame 3 on the moving side only moves, and the fixed frame 1 which is a fixed side plate of the adjustment screw portion 5 or the liquid crystal display integrated with the fixed frame 1 Panel 31
The position of the head of the adjustment screw 5 does not change because the position of the head relative to the other adjustment frame 2 that does not have the built-in does not change. Therefore, when operating the convergence mechanism 32, the head of the adjustment screw 5 is For example, the convergence of the liquid crystal display panel 31 can be easily executed simply by rotating the liquid crystal display panel 31 with a driver or the like.

Further, in the present invention, since the convergence mechanism 32 is operated, the convergence mechanism 32 can be operated by rotating only the adjusting screw 5 to perform the required convergence. This makes it easy to automate, and it is not necessary to provide a mechanism for following the change in the position of the head of the adjusting screw portion 5 on the adjusting driver side in the automatic adjusting device as in the related art. This makes it possible to use a small automatic adjustment device.

The convergence mechanism 32 according to the present invention will be described in more detail. The convergence mechanism according to the present invention comprises a plurality of liquid crystal display panel members 30, usually three liquid crystal display panel members 30. In liquid crystal projectors, especially color display liquid crystal projectors, if the positions of the corresponding pixel portions of the liquid crystal display panel 31 in each liquid crystal display panel member 30 do not match, an accurate image and Since accurate colors cannot be projected, a plurality of liquid crystal display panel members 30
In each of the above, the position of the liquid crystal display panel 31 provided on each liquid crystal display panel member 30 is finely adjusted to adjust the position of each corresponding pixel portion of each liquid crystal display panel. In the present invention, assuming that one color liquid crystal projector includes, for example, three liquid crystal display panel members 30, 30 ′, and 30 ″.
Among them, one liquid crystal display panel member 30 is defined as a reference liquid crystal display panel member, and for each pixel position of the liquid crystal display panel of the reference liquid crystal display panel member 30, each of the remaining liquid crystal display panel members 30 ′, 30 ″. Fine adjustment is made so that the pixel positions of the liquid crystal display panel in the above are matched.

Specifically, the operator operates the convergence mechanism 32 of the two liquid crystal display panel members 30 manually or by a remote control method while watching the projected image of the color liquid crystal projector on the screen. Then, by finely adjusting the liquid crystal display panel 31,
Each pixel position on each liquid crystal display panel 31 of the individual liquid crystal display panel members 30 can be matched.

FIG. 1 is a front view showing the structure of a specific example of the convergence mechanism 32 according to the present invention.
Is a perspective view thereof, and FIG. 3 is a side view thereof. Here, the fixed frame 1 is fixedly provided with respect to the mounting portion 10, and is provided on the front surface of the fixed frame 1 so as to be movable in the horizontal direction, and is an adjustment frame that does not hold the liquid crystal display panel 31. 2 is provided, and an adjustment frame 3 holding a liquid crystal display panel 31 which is configured to be vertically movable is disposed on the front surface of the adjustment frame 2.

In the present invention, the liquid crystal display panel 3
The adjustment frame 3 holding 1 is referred to as a first adjustment frame, and the adjustment frame 2 not holding the liquid crystal display panel 31 is referred to as a second adjustment frame. However, it is not always necessary to use the fixed frame 1 and the first adjustment frame 3 may be used.

Even if the second adjustment frame 2 is provided, the second adjustment frame 2 can be moved in the lateral direction by using, for example, an appropriate movement restricting member 40 so that the second adjustment frame 2 cannot be moved in the horizontal direction. If configured, the first adjustment frame 3
When viewed from above, regarding the vertical sliding movement, the second adjustment frame 2 may be considered to be integrated with the fixed frame 1.

Further, by making the second adjustment frame 2 movable only in the horizontal direction with respect to the fixed frame 1, the first adjustment frame 3 can be moved vertically or horizontally with respect to the fixed frame 1. Fine adjustment can also be made in the direction. The engagement between the second adjustment frame 2 and the fixed frame 1 is determined by the convergence mechanism 32 according to the present invention.
And may be joined by a conventionally known means.

Now, the adjustment frame 3 and the fixed frame 1
If the convergence mechanism 32 between the first adjustment frame 2 and the second adjustment frame 2 is described,
It is desirable that one or two such convergence mechanisms 32 be arranged on the adjustment frame 3 as shown in the figure. That is, when the number of the convergence mechanism 32 is one, the first adjustment frame 3 is the fixed frame 1 or the second adjustment frame integrated with the fixed frame 1.
Can be slid in the vertical direction with respect to the adjustment frame 2. If the two convergence mechanisms 32 are arranged as shown in FIG.
Can rotate and slide the fixed frame 1 or the second adjustment frame 2 integrated with the fixed frame 1, thereby correcting the inclination of the projected image. Becomes

The convergence mechanism 32 includes, as described above, the fixed frame 1 provided on the liquid crystal display panel member 30 or the composite frame of the fixed frame and the adjustment frame 2 engaged with the fixed frame, and the panel display section. 3
8 is provided in the adjustment frame 3 including the adjustment frame 3 and the adjustment frame 3 and the fixed frame 1 or another adjustment frame 2 not including the panel display unit 31.
As shown in FIG. 5, support pieces 3b and 2b having screw holes 33 whose central axes O coincide with each other can be fitted with the common adjustment screw 5 at the same time, and both support pieces 3b and 2b are provided. The common adjustment screw 5 is inserted through the screw hole 33 in the above, and each of the support pieces is provided between the support pieces 3b and 2b along the axial center line O of the adjustment screw 5. The convergence mechanism 32 of the liquid crystal projector in which the elastic member 4 is provided so that a predetermined bias force is applied to 3b and 2b is shown.

The elastic member 4 used in the present invention is not particularly limited. For example, a plate-like spring body, a coil-like spring body, a bar spring body, a rubber An elastic body composed of a synthetic resin body or the like can be used. In FIG. 1, in particular, it is composed of a fixed frame 1, a second adjustment frame 2 that slides in the horizontal direction, and a first adjustment frame 3 that slides in the vertical direction. An example is shown in which the above-mentioned support pieces 2b and 3b are provided on the first adjustment frame 3 that slides in the direction shown in FIG.

That is, the first adjustment frame 3 which is a vertical adjustment plate is supported so as to be able to move in the vertical and rotational directions with respect to the second adjustment frame 2 which is a horizontal adjustment plate. The adjustment frame 2 is supported so as to be movable only in the lateral direction with respect to the fixed frame 1. Between the support pieces 3a, 3b of the first adjustment frame 3 and the support pieces 2a, 2b of the second adjustment frame 2, leaf springs 4a, 4b as shown In the direction in which the action point x of the support pieces 3a and 3b in the first adjustment frame 3 and the action point y of the support pieces 2a and 2b in the second adjustment frame 2 approach each other. A biasing force is applied.

The support pieces 3a, 3b of the first adjustment frame 3 and the support pieces 2a, 2b of the second adjustment frame 2 are provided with screw holes 33, 33 ', respectively. A suitable screw hole 33 "is provided in a part of the leaf springs 4a and 4b.
Adjusting screws 5a and 5b are provided so as to penetrate 3 ′ and the screw holes 33 ″ of the springs 4a and 4b.

In the figure, reference numeral 9 denotes a pressing force in a range that does not prevent the fixed frame 1, the second adjustment frame 2 and the first adjustment frame 3 from sliding with each other. Reference numeral 42 denotes a convergence mechanism that is used when the second adjustment frame 2 is slidably adjusted in the horizontal direction, and is a convergence mechanism that holds the three members at a predetermined pressure. The second adjustment frame 2 is slid with respect to the second adjustment frame 2.

The pressing force can be adjusted by, for example, an appropriate screw mechanism 11.
a and 11b. Such a structure is
The same applies to the fixing member 8 at the lower end of each frame portion. Although the configuration of the convergence mechanism 42 is not particularly limited, the same configuration as the convergence mechanism 32 in the present invention as described above may be employed.

That is, in the present invention, the elastic member 4
Is desirably held between the support pieces 2 and 3 by the adjustment screw 5, and the convergence mechanism 3
Reference numeral 2 denotes a configuration in which the adjustment frame 3 can be moved and adjusted in a vertical direction or a horizontal direction with respect to the fixed frame 1. In the present invention,
The convergence mechanism 32 is, through a predetermined interval,
At least two adjustment frames are arranged on the adjustment frame 3 so that the adjustment frame 3 can be rotated by a predetermined angle with respect to the fixed frame 1.

In the present invention, the convergence mechanism 32 includes a first adjustment frame 3 that can be moved and adjusted in a vertical direction with respect to the fixed frame 1 and a left and right direction with respect to the fixed frame 1. And a second adjustment frame 2 that can be moved and adjusted, and one adjustment frame may be configured to perform the same function as the fixed frame 1 with respect to the other adjustment frame.

Further, in the present invention, the adjusting screw 5 held between the support pieces 2 and 3 of the adjusting frame 3 is provided.
Is rotated to adjust the adjustment frame 3 to the fixed frame 1.
, The relative position of the adjusting screw 5 with respect to the fixed frame 1 does not change. Further, the above configuration is also applied to the case where the second adjustment frame 2 is omitted in the above-described drawings, and various members attached to the second adjustment frame 2 are not used. The same effect can be achieved by forming it on the fixed frame 1.

Next, the operation of the convergence mechanism 32 according to the present invention will be described with reference to FIGS. That is, the first adjustment frame 3 holding the liquid crystal display panel 31 by rotating the adjustment screw 5, specifically 5a, 5b at a predetermined angle, is moved relative to the second adjustment frame 2 and the fixed frame 1. , Can be moved up and down, or rotated by a predetermined angle.

Since the second adjustment frame 2 moves only in the lateral direction with respect to the fixed frame 1, the first adjustment frame 3 is fixed to the mounting portion 10 by the vertical movement or the predetermined rotational movement. It can be said that the motion is with respect to the fixed frame 1. The support pieces 3a of the first adjustment frame 3,
The leaf springs 4a, 4b are hung on the points of action x and y between the support piece 3b and the support pieces 2a, 2b of the second adjustment frame 2, so that the support pieces 3a, 3b and 2a, 2b approach each other. The biasing force is applied to the adjustment screws 5 to eliminate the backlash of the adjustment screws 5a and 5b fitted to the respective support pieces, which are the adjustment screws 5, so that the adjustment is performed by rotating the adjustment screws 5a and 5b. The support pieces 3a of the frame 3
The distance between the support pieces 3b and the support pieces 2a and 2b of the second adjustment frame 2 can be changed smoothly, whereby the first adjustment frame 3 moves easily and finely with respect to the fixed frame 1.

At this time, the leaf springs 4a and 4
Since the point of action of the force b is coaxial with the point of action of the adjusting screws 5a and 5b, the moment force by the leaf spring 4a does not interfere with the moment force by the leaf spring 4b. Therefore, the first adjustment frame 3 is smoothly moved by the adjustment screw 5 without being affected by variations in the spring force of the leaf springs 4a and 4b.

Therefore, the adjustment frame 3 can be precisely adjusted in the vertical and rotational directions with respect to the fixed frame 1. In the present invention, since the adjusting screws 5a and 5b which are specific examples of the adjusting screw 5 are provided so as to pass through the support holes 33 "of the leaf springs 4a and 4b, the leaf springs 4a and 4b are provided.
It also has the function of locking. For this reason, it is not necessary to separately provide a locking member or the like, and the device can be downsized.

By providing screw holes 33, 33 'in the first adjusting frame 3, the adjusting screws 5a, 3'
By turning 5b, only the first adjustment frame 3 moves,
Since the positions of the adjusting screws 5a and 5b with respect to the second adjusting frame 2 do not change, the positions of the heads of the adjusting screws 5a and 5b with respect to the fixed plate 1 do not change, and the adjusting screw 5a is provided to the adjusting driver side of the automatic adjuster. , 5b, there is no need to provide a mechanism for following the movement of the head, and automation is easy.

Next, the convergence mechanism 3 according to the present invention.
Another specific example 2 will be described with reference to FIG. That is, as a second specific example according to the present invention, as shown in FIG. 6, a coil spring 4 is used instead of a leaf spring as an example of the elastic member 4 used in the first embodiment. The adjustment screw 5 is fitted into the center space of the coil to prevent the elastic member 4 from dropping off, and the operating direction axis of the screw matches the action line of the elastic member 4. The difference from the above-described specific example is that, in this specific example, the biasing direction of the bias of the elastic member 4 is set in a direction in which the support pieces are separated from each other. Is the same as that of the above specific example.

In the present invention, therefore, in order to perform a predetermined convergence operation using the above-described convergence mechanism, for example, a plurality of liquid crystal display panel members arranged independently of each other are combined. In the liquid crystal projector, a convergence method for adjusting the position of the panel display portion of each liquid crystal display panel member with respect to the panel display portions of other liquid crystal display panel members, provided in the liquid crystal display panel member. The fixed screw provided with the fixed frame and at least one of the adjustment frames including the panel display unit and the other adjustment frame not including the fixed frame or the panel display unit is simultaneously fitted with the adjustment frame. A support piece having a screw hole having a central axis coinciding with each other is provided, and through the screw holes of the two support pieces. By rotating the adjustment screw to be inserted, the adjustment frame incorporating the panel display section is slidably moved with respect to the fixed frame or another adjustment frame not incorporating the panel display section, and between the two support pieces. A convergence method of moving the adjustment frame in a predetermined direction and a predetermined distance while applying a bias force in a direction opposite to a relative movement direction of the adjustment frame and the fixed frame by the adjustment screw.

[0041]

The first effect of the convergence mechanism according to the present invention is that the adjusting screw and the fixed frame move smoothly with respect to each other by the adjusting screw 5, thereby enabling more precise adjustment. That is, since the elastic member 4 is hung between the application points of the adjusting screw 5, no unnecessary moment acts, and at the same time, the influence of the variation between the elastic members 4, the distance between the application point and the biasing position of the spring, and the like. This is to avoid receiving.

A second effect of the convergence mechanism according to the present invention is that the size of the apparatus can be reduced. That is,
This is because the adjusting screw 5 prevents the elastic member 4 from dropping off, and does not require the locking of the spring, which is conventionally required. A third effect of the convergence mechanism according to the present invention is that the rotation direction of the liquid crystal display panel in the liquid crystal projector can be precisely adjusted.

This is because the two convergence mechanisms are provided, and the adjusting screws 5 of the convergence mechanism are provided with biasing springs, so that both adjusting screws can move smoothly. This is because there is no difference in the movement depending on the rotation direction of. Further, a fourth advantage of the convergence mechanism according to the present invention is that the automatic adjuster is easy to use.

That is, in the present invention, by providing a screw hole on the adjustment frame side, even if the adjustment screw 5 is turned, only the adjustment frame 3 moves, and the fixed side plate 1 is moved.
This is because the position of the head of the adjusting screw 5 does not change with respect to, so that there is no need to provide a mechanism for following the movement of the head of the adjusting screw 5 on the adjusting driver side of the automatic adjusting machine.

[Brief description of the drawings]

FIG. 1 is a plan view of a convergence mechanism according to the present invention.

FIG. 2 is a perspective view of a convergence mechanism according to the present invention.

FIG. 3 is a side view of a convergence mechanism according to the present invention.

FIG. 4 is a top view of a convergence mechanism according to the present invention.

FIG. 5 is an enlarged side view showing a main part of an adjusting screw portion of the convergence mechanism according to the present invention.

FIG. 6 is an enlarged side view showing a main part of an adjusting screw portion in another specific example of the convergence mechanism according to the present invention.

FIG. 7 is a schematic plan view of a conventional convergence mechanism.

FIG. 8 is an enlarged perspective view showing an outline of a configuration of a convergence mechanism according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fixed frame 2 ... 2nd adjustment frame 3 ... 1st adjustment frame 4 ... Elastic member 5 ... Adjustment screw material 8, 9 ... Holding part 10 ... Mounting part 11 ... Screw mechanism 15 ... Liquid crystal panel 16 ... Adjustment plate 17 ... biasing spring 18 ... adjusting screw 30 ... liquid crystal display panel member 31 ... panel display unit 32 ... convergence mechanism 33 ... screw hole 40 ... regulating member 3b, 2b ... support piece

Claims (7)

[Claims] In a liquid crystal projector constituted by combining a plurality of liquid crystal display panel members arranged independently of each other, the position of a panel display section of each liquid crystal display panel member is changed to another liquid crystal display panel member. A convergence mechanism provided on each of the liquid crystal display panel members for adjusting with respect to the panel display unit, wherein the convergence mechanism includes a fixed frame and a panel display unit provided on the liquid crystal display panel member. The first adjustment frame or the fixed frame, the second adjustment frame not including the panel display unit engaged with the fixed frame, and the first adjustment frame, and the first adjustment frame. A common screw portion is simultaneously fitted to the adjustment frame and the fixed frame or the second adjustment frame engaged with the fixed frame. Support pieces having screw holes whose center axes coincide with each other are provided, and a common adjusting screw is inserted through the screw holes in the two support pieces, and the support piece is inserted between the support pieces. A convergence mechanism for a liquid crystal projector, wherein an elastic member is provided so that a predetermined biasing force is applied to each of said support pieces along an axis center line of said adjusting screw. 2. The device according to claim 1, wherein the elastic member is held between the support pieces by the adjusting screw.
A convergence mechanism of the liquid crystal projector described in the above. 3. The convergence mechanism is configured such that the first adjustment frame can be moved and adjusted vertically or horizontally with respect to the fixed frame or the second adjustment frame. 3. The convergence mechanism according to claim 1, wherein: 4. At least two convergence mechanisms are disposed on the first adjustment frame at a predetermined interval, thereby rotating the first adjustment frame by a predetermined angle with respect to the fixed frame. 4. The convergence mechanism according to claim 1, wherein the convergence mechanism is configured as follows. 5. A convergence mechanism comprising: a first adjustment frame movable up and down with respect to the fixed frame; and a second adjustment frame movable up and down with respect to the fixed frame. The convergence mechanism according to claim 3, wherein the second adjustment frame is configured to perform the same function as the fixed frame with respect to the first adjustment frame. 6. An adjustment screw held on the supporting piece of the first adjustment frame is rotated to move the first adjustment frame with respect to the fixed frame or the second adjustment frame. 4. The convergence mechanism according to claim 3, wherein a relative position of the adjusting screw with respect to the fixed frame does not change. 7. In a liquid crystal projector constituted by combining a plurality of liquid crystal display panel members arranged independently of each other, the position of a panel display section of each liquid crystal display panel member is changed to another liquid crystal display panel member. A convergence method for adjusting with respect to the panel display unit, wherein the fixed frame provided on the liquid crystal display panel member and the first adjustment frame incorporating the panel display unit, or the first frame is engaged with the fixed frame. Second without built-in panel display
The first adjustment frame and the first adjustment frame are respectively inserted through the screw holes of the support piece having screw holes whose central axes coincide with each other, in which common screw portions can be fitted simultaneously. By turning the adjusting screw
The first adjustment frame is replaced with the fixed frame or the second adjustment frame.
In a direction opposite to the relative movement direction of the first adjustment frame and the fixed frame or the second adjustment frame by the adjustment screw between the two support pieces while sliding with respect to the adjustment frame. A convergence method characterized by moving the first adjustment frame in a predetermined direction and a predetermined distance while applying the biasing force.