JPH0728048A - Liquid crystal display element manufacturing method and manufacturing apparatus - Google Patents

Abstract

(57) [Summary] [Structure] When the microlens array is attached to the liquid crystal panel with an adhesive, the microlens array is vibrated from above the liquid crystal panel while being held by suction by the lens holding means. However, the adhesive layer is gradually lowered until the thickness of the adhesive layer reaches a predetermined thickness, that is, until it is confirmed that the descending distance has reached the predetermined distance (S1.2.3.
4). After the predetermined distance is reached, the lens vibration moving means is stopped, the suction of the lens holding means is released, and the microlens array is lowered by its own weight (S5.
6) Then, the thickness of the adhesive is adjusted. [Effect] The reliability of the liquid crystal panel is improved by suppressing non-uniformity of the cell gap in the liquid crystal panel, deterioration of the image quality due to the non-uniformity, and deterioration of the image quality due to bubbles mixed in the adhesive agent, and adhesion. It is possible to improve productivity by shortening the required time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a liquid crystal display device having a microlens array attached to the surface of a liquid crystal panel for improving the effective aperture ratio.

[0002]

2. Description of the Related Art In recent years, liquid crystal display elements have been in high demand not only as direct-viewing type display elements but also as projection type display elements used in OHP (Overhead Projector), projection television and the like. When the liquid crystal display element is used as a projection type, if the enlargement ratio is increased by the conventional number of pixels, the screen roughness becomes conspicuous. Therefore, in order to obtain a fine image with a high aperture ratio, it is necessary to increase the number of pixels.

However, when the number of pixels of the liquid crystal display element is increased, particularly in the active matrix type liquid crystal display device, the area occupied by the portions other than the pixels becomes relatively large, and accordingly, these portions are covered. The area of the black matrix increases. When the area of the black matrix is increased, the area of the pixels contributing to the display is reduced and the aperture ratio of the display element is reduced. That is, simply increasing the number of pixels results in a decrease in the aperture ratio, the screen becomes dark, and the image quality deteriorates.

Therefore, it has been proposed to form a microlens on one surface of the liquid crystal display element in order to prevent the reduction of the aperture ratio of the display element due to the increase in the number of pixels. -165621-165624). According to this, by forming a plurality of microlenses corresponding to each pixel, it is possible to condense the light, which was conventionally shielded by the black matrix, into the pixel of the liquid crystal display element, and to provide an effective light Can be used.

A substrate-shaped microlens array on which microlenses are formed is bonded to a liquid crystal panel (hereinafter, a liquid crystal display element before the microlens array is attached is referred to as a liquid crystal panel). The same effect can be obtained by sticking. Specifically, for example, an ultraviolet curable adhesive (hereinafter, simply referred to as an adhesive) is applied to the entire surface of one substrate of the liquid crystal panel, and a microlens array is placed on the surface to which the adhesive is applied. After applying pressure to adjust the thickness of the adhesive, the adhesive is irradiated with ultraviolet rays to be cured.

As a method for manufacturing the above-mentioned microlens array, an ion exchange method (Appl. Optics, 21.
(6), p1052 (1982)), swelling method (new method for producing plastic microlenses, 24th Micro Optical Research Group), heat slump method (Appl. Optics, 2)
7, p1281 (1988), vapor deposition method (JP-A-55-
135808), thermal transfer method (JP-A-61-1641).
58), machining methods, and the like.

[0007]

However, when the microlens array is attached to the liquid crystal panel by such a method, the substrate of the liquid crystal panel is thin and lacks in rigidity. The cell gap is likely to be locally non-uniform, which causes a problem that the image quality is degraded due to light leakage, lighting unevenness, etc. when completed as a liquid crystal display element.

Further, if the cell gap is locally non-uniform, a large stress is generated between the adhesive and the substrate of the liquid crystal panel, peeling is likely to occur, and productivity and reliability are impaired. This is not only due to the slight warpage of the microlens array itself, but also the pressure applied during sticking, which is applied for a certain period of time, remains in the liquid crystal display element, and this non-uniform pressure remains. It is considered that this is because the adhesive hardens in the state of being formed.

In order to prevent such a problem, the microlens array is not loaded, that is, the microlens array is not pressed so that the pressing force does not remain in the liquid crystal panel at the time of attachment. Although it is also proposed to attach the sheet by its own weight, it takes a long time and the productivity is remarkably reduced.

Further, in the above-mentioned conventional sticking method, bubbles are apt to be mixed in the adhesive, so that the refractive index of light locally changes due to the mixed bubbles, which also causes
This causes a situation in which the image quality deteriorates.

Therefore, the present invention has been made in view of the above problems, and a method of manufacturing a liquid crystal display device capable of suppressing the deterioration of image quality to improve reliability and also improving productivity, and It is intended to provide a manufacturing apparatus.

[0012]

In order to solve the above-mentioned problems, a method for manufacturing a liquid crystal display device according to claim 1 of the present invention has a pair of transparent substrates, and a liquid crystal substance is filled between the substrates. In a method for manufacturing a liquid crystal display element, in which a microlens array for condensing light on each of the pixels is lowered from above on a liquid crystal panel on which a large number of pixels are formed, and which is attached via an adhesive, during attachment, Until the thickness of the adhesive layer interposed between the liquid crystal panel and the microlens array reaches a predetermined thickness, the microlens array is pressed and lowered, and the adhesive layer has a predetermined thickness. After reaching, the feature is that the microlens array is lowered by its own weight.

In order to solve the above-mentioned problems, the method of manufacturing a liquid crystal display element according to a second aspect is the method of manufacturing a liquid crystal display element according to the first aspect, wherein the microlens array is pressed and lowered. The microlens array is vibrated.

In order to solve the above-mentioned problems, a liquid crystal display device manufacturing apparatus according to a third aspect of the present invention has a panel supporting means for supporting a liquid crystal panel and a microscopic device attached to the liquid crystal panel via an adhesive. Lens holding means for holding the lens array, lens vibration moving means for lowering the microlens array held by the lens holding means while vibrating the liquid crystal panel supported by the panel supporting means, and the lens vibration movement The means is controlled so that the microlens array is lowered by a predetermined distance from the descent start point, and the lens holding means is configured to hold the microlens array when the descent distance of the microlens array reaches a predetermined distance. And a control means for controlling so as to be released.

[0015]

According to the method of claim 1, the thickness of the adhesive layer is a predetermined thickness, for example, the thickness of the adhesive spread to about 1/3 of the area of one surface of the liquid crystal panel in contact with the microlens array. Until, the microlens array is pressed and lowered, and thereafter, the microlens array is lowered by its own weight. Therefore, it is possible to have both the advantage that the time required for sticking can be shortened by lowering the pressure and the advantage that the pressure force does not remain in the liquid crystal display element due to the lowering of the self-weight. It is possible to suppress the unevenness of the image and the deterioration of the image quality due to the unevenness, thereby improving the reliability, and shortening the time required for sticking to improve the productivity.

Further, according to the method of claim 2, since the microlens array is vibrated when the pressure is lowered, it becomes difficult for bubbles to be taken into the adhesive due to the action of the vibration, and the bubbles mixed in the adhesive. It is possible to suppress the deterioration of the image quality due to and further improve the reliability. Then, by using the apparatus according to the third aspect, the method for manufacturing the liquid crystal display element described above can be more effectively realized.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS.
It will be described below with reference to.

The microlens array 1 used in this embodiment is manufactured by, for example, an ion exchange method,
It is formed of soda glass or the like containing a large amount of Na ions, and as shown in FIG. 2 (a), on the lower surface in the figure,
A plurality of microlenses corresponding to each pixel of the liquid crystal panel 2 described later are formed by the refractive index distribution generated by the Na ion concentration distribution.

The microlens array 1 has a liquid crystal panel 2 and an ultraviolet curable adhesive 3 (hereinafter,
The adhesive is simply abbreviated). The liquid crystal panel 2 includes substrates 2a and 2b made of borosilicate glass.
The substrates 2a and 2b are attached to each other at their end faces by an annular sealing material 6, and liquid crystal is filled between them to form a liquid crystal layer 5. On the other hand, on the surface of the substrate 2b in contact with the liquid crystal layer 5, a pixel electrode, a switching element,
Bus wiring and the like are formed.

The adhesive 3 is preliminarily mixed with a spacer 4 for equalizing the thickness of the adhesive layer, for example, a spherical plastic spacer having a diameter of 20 μm in this embodiment. Then, as the adhesive 3, for example, quick-curing type LX1347, NORLAND manufactured by Nippon Loctite Co., Ltd.
NOA-61 made by the company, AV made by THREE BOND
R-100 etc. can be mentioned.

Next, the manufacturing apparatus 50 used in the step of attaching the microlens array 1 to the liquid crystal panel 2 will be described with reference to FIG.
Will be described with reference to.

In the manufacturing apparatus 50, a circular index table 21 is rotatably driven in the direction of arrow F at intervals of 90 ° around a vertical rotation axis 51 at approximately the center of a base 59.
Is equipped with. The index table 21 can suck and hold the liquid crystal panel 2 placed on a tray (not shown) together with the tray on the peripheral end side thereof, and intermittently rotate the arrow F every 90 °. The four stop positions P ₁ , P ₂ , P which are distributed by being rotationally driven in the direction
₃ and P ₄ .

At the first point P ₁ at the stop position, there is provided a supply means 52 having a traveling body 53 which is driven to travel in the arrow E ₁ -E ₂ direction. The supplying means 52 mounts the liquid crystal panel 2 (on which the microlens array is not adhered), which is placed on the tray by the traveling body 53 and whose surface is coated with a predetermined amount of the adhesive 3, for example, 4 Vacuum suction is performed by a suction pad (not shown), and the suction power is supplied to the index table 21 in synchronization with the intermittent rotation operation of the index table 21.

At the second point P _2, there is provided a supply means 54 having a traveling body 55 which is driven to travel in the direction of the arrow G ₁ -G ₂ ,
The sticking device 20 including the arm 40 is provided.
The feeding means 54 holds the microlens array 1 on the surface of which a predetermined amount of the adhesive 3 is applied on the running body 55 and feeds it to the sticking device 20.
In the sticking device 20, the microlens array 1 supplied from the supply means 54 is vacuum-sucked by the lens holding means (not shown) provided at the tip of the arm 40, and the microlens array 1 is placed on the liquid crystal panel 2. The microlens array 1 is attached. The details of the structure and operation of the sticking device 20 will be described later.

At a third point P ₃ , an alignment device (not shown) for aligning the microlens array 1 attached on the liquid crystal panel 2 and an adhesive 3 shown by a phantom line in the drawing are cured. And an ultraviolet irradiation device 56 that irradiates ultraviolet rays for the purpose.

At the fourth point P _4, there is provided a carry-out means 57 having a traveling body 58 which is driven to travel in the directions of the arrows G ₁ -G ₂ . The carry-out means 57 uses the traveling body 58.
The liquid crystal panel 2 having the microlens array 1 attached to the surface thereof, that is, the liquid crystal display element 7 is carried out from the index table 21. In addition, in the carry-out means 57,
A detection unit (not shown) for detecting the non-defective product and the defective product is provided, and the non-defective product and the defective product are sorted based on the determination of the detection unit.

Next, a process of manufacturing the liquid crystal display element 7 by the manufacturing apparatus 50 will be described with reference to the process chart of FIG.

The liquid crystal panel 2 placed on a tray (not shown) is set on the traveling body 53, sucked and held, and conveyed in the direction of the arrow E ₁ (process 1, hereinafter, the process is abbreviated as P). Before being supplied onto the index table 21, a predetermined amount of the adhesive 3 is applied to the substantially central portion of the upper surface thereof (P2). Thus, the liquid crystal panel 2 supplied to the first point P ₁ of the index table 21 through P1 and P2 is arranged at the second point P ₂ by the rotation of the index table 21 in the arrow F direction.

On the other hand, the microlens array 1 is set on the traveling body 55 (P3), and a predetermined amount of the adhesive 3 is applied to the substantially central portion of the upper surface thereof (P4), and the supplying means 54 is used to apply the sticking device. The 20 lens holding means is conveyed to a position where the microlens array 1 can be held. Then, in the microlens array 1 held by the lens holding means of the sticking device 20, the application surfaces of the adhesive 3 are relatively placed on the liquid crystal panel 2 arranged at the second point P ₂ of the index table 21. They are laminated and attached so that they face each other (P5). After passing through P5, the liquid crystal panel 2 to which the microlens array 1 is attached is placed at the third point P ₃ by the rotation of the index table 21 in the arrow F direction.

Then, after the alignment is performed by the alignment device (P6), about 1 ultraviolet ray is emitted by the ultraviolet irradiation device 56.
It is irradiated for 0 seconds (P7). As a result, the adhesive 3 interposed between the liquid crystal panel 2 and the microlens array 1 is hardened, the liquid crystal panel 2 and the microlens array 1 are bonded, and the liquid crystal display element 7 is formed.

After that, the liquid crystal display element 7 is placed at the fourth point P ₄ by the rotation of the index table 21 in the direction of the arrow F, is placed on the traveling body 58, and is carried out of the apparatus by the carrying-out means 57. It With this, the liquid crystal panel 2
The step of sticking the microlens array 1 on is completed.

Next, the second point P ₂ is provided,
The sticking apparatus 20 that performs the process 5 will be described with reference to FIGS. 5 and 6.

As shown in FIG. 5, the sticking device 20 includes an index table 21 provided in the manufacturing device 50 described above.
Panel supporting means 22 for supporting the liquid crystal panel 2 placed on the liquid crystal panel, lens holding means 23 for adsorbing and holding the microlens array 1 attached to the liquid crystal panel 2 with an adhesive, and lens holding means. The lens vibrating moving means 24 is configured to move the microlens array 1 held by 23 on the liquid crystal panel 2 supported by the panel supporting means 22 while lowering it while vibrating it.
The index table 21 is included in the supporting means 22.

The lens vibration moving means 24 includes a base 25.
Has a servo motor 26 attached thereto, and the power of the servo motor 26 is transmitted to a screw rod 30 arranged in the vertical direction via a pulley 27, a timing belt 28 and a pulley 29. There is. This screw rod 3
An elevating body 31 is screwed to the 0 position so that the elevating body 31 can be moved up and down according to the rotation direction of the screw rod 30. An inverted L-shaped support member 33 is fixed to the elevating body 31 by a placket 32, and the support member 33 is attached to one of the bases 25 by a vertical guide means 34 composed of a plurality of rollers and the like. Side wall 3 rising vertically from the side
5 and the arm 40 described above. With such a configuration, the arm 40 can be moved up and down by driving the servo motor 26.

The rib 36 of the support member 33 has
A pulley 38 driven by a servo motor 37 is pivotally supported, and a belt 39 wound around the pulley 38 is provided.
The arm 4 attached to the support member 33 via
The power is transmitted to the other pulley 41 connected to the base unit of 0. As a result, the arm 40 extends substantially horizontally to the index table 21 side, as shown by the solid line in the figure, and an imaginary line 40.
As shown by a, it is driven to be reversed in the directions of arrows B ₁ -B _{2 while} being driven to be angularly displaced in the direction of arrow B ₂ .

The lens holding means 23 is provided at the free end of the arm 40. The lens holding means 23 is provided with a suction pad 42 to which a suction force is guided from a suction source 43, whereby the lens holding means 2 is provided.
3 is capable of holding the microlens array 1 by vacuum suction as described above. On the other hand, this sticking device 2
As shown in FIG. 6, 0 includes a CPU (Central Processing Unit) 11 realized by, for example, a microprocessor, and the CPU 11 stores programs for controlling various operations of the sticking device 20. ROM (Read On
memory 12 and an input means 13 for inputting data for controlling the rotational drive of the servo motors 26, 37, etc.
And a RAM (Random Access Memory) 14 for temporarily storing the data input from the input means 13,
The display means 15 such as a liquid crystal display for displaying the data stored in the RAM 14 is connected to the servo motors 26 and 37 and the suction source 43. The CPU 11, the ROM 12, and the RAM 14 constitute a control device 10 which is a control means, and controls the servo motors 26 and 37 and the suction source 43 as described later. The descending distance of the microlens array 1 in the sticking device 20 controlled by the controller 10 is within the range of 1.5 μm to 2000 μm, for example, and the frequency of descending at a constant speed at this time is 2 HZ.
˜30 KHZ, amplitude in the range of 10 μm to 50 μm.

The operation at the time of sticking by the sticking device 20 based on the control of the control device 10 is based on the flow chart of FIG. 1 and with reference to FIG. 2, and the liquid crystal panel 2 and the microlens array 1 at that time. It will be explained while showing the state.

At the time of starting the operation of the sticking device 20, the data for controlling the rotational drive of the servomotors 26, 37 and the like are inputted from the input means 13 in advance. The data includes the desired film thickness D of the adhesive 3 that serves as a reference when switching from mechanical pressure descent to descent by its own weight. This varies depending on the type of the adhesive 3, for example, a microlens array. The thickness of the adhesive 3 when the adhesive 3 spreads to about 1/3 of the adhesive-applied surface of the liquid crystal panel 2 in contact with 1 may be specifically, in the range of 20 μm to 1000 μm. In the present embodiment, the predetermined film thickness D of the adhesive 3 is 500 μm, and the vibration frequency and amplitude of the microlens array 1 when descending are 150 HZ and 30 μm, respectively.
It is assumed that the position is gradually lowered from the lowering start position every 100 μm.

When the manufacturing apparatus 50 operates and the sticking apparatus 20 starts operating, first, the control apparatus 10 causes the suction source 43 with the arm 40 indicated by the phantom line 40a (see FIG. 5).
Is turned on, and the lens holding means 23 holds the microlens array 1 by suction with the surface coated with the adhesive 3 facing up (S1). Next, in this state, the servo motor 37
Is turned on, the arm 40 is angularly displaced in the direction of the arrow B ₁ , and the arm 40 is extended substantially horizontally toward the index table 21 (S2). As a result, the held microlens array 1 is located at the descent start position, and the liquid crystal panel 2 already mounted on the index table 21.
Then, the coated surfaces of the adhesive 3 face each other (see FIG. 2A).

Next, based on the data regarding the descending distance stored in the RAM 14 in advance, the servo motor 26 is turned on to drive the lens vibration moving means 24, and the microlens array 1 is moved down by 100 μm while vibrating (S3). ). Then, it is determined whether or not the descending distance has reached the distance at which the microlens array 1 should be descended from the desired film thickness D (500 μm) of the adhesive 3 stored in advance in the RAM 14 (S4).

In S4, if the descending distance of the microlens array 1 has not fallen below the predetermined distance and it is determined to be NO, the process returns to S3, S3 to S4 are repeated until the predetermined distance is reached, and the microlens array 1 descends by 100 μm. Let As a result, the surfaces of the adhesive 3 on the microlens array 1 side and the adhesive 3 on the liquid crystal panel 2 side contact each other, and the area of the adhesive 3 in contact with the surface of the substrate 2a gradually increases (FIG. 2).
(See (b)). At this time, air tends to be taken into the adhesive 3 due to the lowering of the microlens array 1, but since the microlens array 1 is vibrating, the air is released without being taken into the adhesive 3. No bubbles are generated in the adhesive 3.

Then, when the descending distance of the microlens array 1 reaches a predetermined distance and it is judged as YES, RO
The servo motor 26 is turned off according to the program stored in M12 to stop the descending of the microlens array 1 (S5), and the suction source 43 is turned off according to the program stored in the ROM 12 as well. Microlens array 1 vacuum-adsorbed on
The holding state of is released (S6). In S6, when the suction by the lens holding means 23 is released, the microlens array 1 has its own weight and the thickness of the layer of the adhesive 3 is about the thickness of the spacer mixed in the adhesive layer 3 (about 20 μm). Until it reaches (see FIG. 2 (c)). Then, as described above, it is conveyed to the third point P ₃ and processed.

As described above, in the sticking device 20 of this embodiment, until the thickness of the layer of the adhesive 3 interposed between the liquid crystal panel 2 and the microlens array 1 reaches the predetermined thickness D, After the microlens array 1 is pressed and lowered to reach a predetermined thickness, the microlens array 1 is
The adhesive 3 is attached by adjusting the thickness of the adhesive 3 by lowering it by its own weight, which is a combination of pressure lowering and self-weight lowering. Therefore, with the advantage that the time required for sticking can be shortened by lowering the pressure,
It is possible to have an advantage that the pressure force does not remain in the liquid crystal display element 7 due to its own weight lowering, and as a result, the cell gap becomes non-uniform when the liquid crystal display element 7 is completed, and the image quality due to this becomes uneven. It is possible to suppress the decrease in the adhesiveness and improve the reliability, and it is possible to shorten the time required for sticking and improve the productivity.

Further, in the sticking device 20 of this embodiment, when the microlens array 1 is pressed and lowered, the microlens array 1 is lowered while being vibrated by the lens vibration moving means 24. Because
Bubbles are less likely to be taken into the adhesive 3 due to the action of vibration, and the deterioration of the image quality due to the bubbles mixed in the adhesive is suppressed, thereby further improving the reliability.

In the manufacturing apparatus 50 of this embodiment,
Not limited to the microlens array 1, as shown in FIG.
Rectangular color filters 8a, 8b, 8c composed of the three primary colors of red, green and blue corresponding to each pixel of the liquid crystal display element 7 are
It is also possible to attach the microlens array 1'which is individually formed on the surface, and in that case, the manufacturing apparatus 5 described above is used.
The ultraviolet irradiation time at 0 may be changed from 10 seconds to 15 seconds.

[0046]

As described above, in the method of manufacturing a liquid crystal display element according to the first aspect of the present invention, the thickness of the adhesive layer interposed between the liquid crystal panel and the microlens array at the time of sticking is controlled. The microlens array is pressed and lowered until it reaches a predetermined thickness, and after the thickness of the adhesive layer reaches a predetermined thickness, the microlens array is lowered by its own weight. The liquid crystal display device manufacturing apparatus described in 2 further vibrates the microlens array when the microlens array is pressed and lowered. And the manufacturing apparatus of the liquid crystal display element according to claim 3 is an apparatus capable of effectively realizing the above-mentioned manufacturing method of the liquid crystal display element.

As a result, it is possible to combine the advantage that the time required for sticking can be shortened by lowering the pressure and the advantage that the pressure force does not remain in the liquid crystal display element due to the lowering of its own weight, and the cell in the liquid crystal panel can be obtained. It is possible to improve the reliability by suppressing the non-uniformity of the gap and the deterioration of the image quality due to the non-uniformity, and it is possible to shorten the time required for sticking and also improve the productivity. .

Further, by vibrating the microlens array when the pressure is lowered, it becomes difficult for bubbles to be taken into the adhesive due to the action of vibration, and deterioration of image quality due to bubbles mixed in the adhesive is suppressed. The effect is that the reliability can be further improved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a flow chart showing an operation of a sticking apparatus.

FIG. 2 is an explanatory view illustrating a state in which a microlens array is attached to a liquid crystal panel using the above-mentioned attaching device, FIG. 2A is a state in which the microlens array is being pressed and lowered, (B) shows a state in which the adhesive layer has a predetermined thickness and the pressurizing and descending is stopped, and (c) shows a state in which the microlens array descends by its own weight and the adhesive thickness is adjusted.

FIG. 3 is a plan view of a manufacturing apparatus used for manufacturing a liquid crystal display element.

FIG. 4 is a process diagram for manufacturing a liquid crystal display element using the manufacturing apparatus.

FIG. 5 is a configuration diagram of a sticking device provided in the manufacturing apparatus.

FIG. 6 is a block diagram of a control system provided in the sticking device.

FIG. 7 is a cross-sectional view of another liquid crystal display element manufactured by the manufacturing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Microlens array 2 Liquid crystal panel 3 Adhesive 4 Spacer 10 Control device 20 Adhesion device 22 Panel support means 23 Lens holding means 24 Lens vibration moving means 50 Manufacturing apparatus

Claims (3)

[Claims] 1. A liquid crystal panel having a pair of transparent substrates, filled with a liquid crystal material between the substrates, and having a large number of pixels formed therein, and a microlens array for focusing light on each of the pixels is lowered from above. Then, in the method for manufacturing a liquid crystal display element in which the adhesive is applied via an adhesive, at the time of adhesion, until the thickness of the adhesive layer interposed between the liquid crystal panel and the microlens array reaches a predetermined thickness, A method of manufacturing a liquid crystal display device, comprising: pressing down the microlens array, lowering the microlens array, and then lowering the microlens array by its own weight after the thickness of the adhesive layer reaches a predetermined thickness. 2. The method of manufacturing a liquid crystal display device according to claim 1, wherein the microlens array is vibrated when the microlens array is pressed and lowered. 3. A panel supporting means for supporting a liquid crystal panel, a lens holding means for holding a microlens array attached to the liquid crystal panel via an adhesive, and a microlens array held by the lens holding means. And the lens vibration moving means for moving the lens vibration moving down onto the liquid crystal panel supported by the panel supporting means and the lens vibration moving means so that the microlens array is moved down by a predetermined distance from the descent start point. At the same time, a control means is provided for controlling the lens holding means so that the holding state of the microlens array is released when the descending distance of the microlens array reaches a predetermined distance. Liquid crystal display device manufacturing equipment.