JP2812844B2 - Peeling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a peeling device for peeling a microlens substrate from a projection type liquid crystal display device to which a microlens substrate is adhered in a manufacturing stage.

[0002]

2. Description of the Related Art In order to realize a large-screen display with a light-weight device, there is a projection-type display device in which strong light is applied to a transmission-type display element and is projected on a screen through a projection lens. As such a display element, a color liquid crystal display element, an electrochromic display, and the like are known. In particular, color liquid crystal display elements have a high degree of perfection, and have been commercialized as the projection type liquid crystal display devices.

As a driving method of the liquid crystal display device, a simple matrix method, an active matrix method using a three-terminal switching element such as a non-linear two-terminal element or a thin film transistor (TFT), and the like are known. In an active matrix type liquid crystal display element, a switching element such as a TFT is provided for each pixel, and a signal line must be wired between each pixel in order to supply a driving signal to each pixel. The ratio of the area (this is called an aperture ratio) decreases. Further, when a light-shielding mask for preventing light leakage from a portion other than the pixel region is provided in order to obtain a clear image, light incident to a portion other than the pixel region is reflected or absorbed and does not reach the screen. For this reason, when the aperture ratio of the liquid crystal display element decreases, the projection screen becomes dark.

In order to solve such a problem, a microlens is provided on the light source side of the liquid crystal display device for condensing and irradiating light from each light source to each pixel. Microlenses include microlenses with hemispherical protrusions on the surface and those that function as lenses by forming a refractive index distribution region in the microlens substrate.Each microlens corresponds to each pixel They are arranged and formed on a microlens substrate. The microlens substrate is coated on the light source side substrate surface of the liquid crystal display element with an ultraviolet curable adhesive, etc., and then the microlens substrate is mounted on the microlens substrate. The two substrates are accurately positioned so as to collect light. Thereafter, the adhesive is cured by irradiating ultraviolet rays to complete the bonding of the microlens substrate.

FIG. 8 is a sectional view of a liquid crystal display panel 1 having a microlens substrate 2. The liquid crystal display panel 1
A liquid crystal layer is interposed between a pair of light-transmitting substrates 3 and 4 and housed in a resin frame 5 having an opening corresponding to a display area of the liquid crystal display panel 1. The resin frame 5 is fixed by a metal frame 8 having an opening corresponding to a display area of the liquid crystal display panel 1 and an upper lid 9 facing the metal frame 8 and having an opening corresponding to a light source light incident area. The resin frame 5 is formed in a rectangular frame shape, and bosses 7 are formed at four corners. Each boss 7 has a pin hole 10
Is formed. Insertion holes are respectively formed in the four corners of the metal frame 8 and the upper lid 9 opposed thereto, corresponding to the positions of the bosses 7 of the resin frame 5, and the bosses 7 are inserted into the respective insertion holes. Resin frame 5 is fixed to metal frame 8 and upper lid 9.

Further, the liquid crystal display panel 1 has a microlens substrate 2 on which a plurality of microlenses 6 for condensing light source light incident from above in FIG. It is mounted on the substrate 3 of the liquid crystal display element from the opening of the upper lid 9 and bonded.

[0007]

When dust or air bubbles of an adhesive are mixed in the bonding surface between the substrate 3 of the liquid crystal display panel 1 and the microlens substrate 2, the display element of the liquid crystal display panel 1 is non-defective. However, such a liquid crystal display panel 1 becomes a defective product. Therefore, it is necessary to separate the microlens substrate 2 from the liquid crystal display panel 1 and to clean the microlens substrate 2 and the substrate 3 in order to adhere the microlens substrate 2 again.

[0008] However, the shearing force between the substrate 3 of the liquid crystal display panel 1 and the microlens substrate 2 in a state where the adhesive has been cured and the adhesive has been cured is 10
kgw or more, and it is difficult to peel off the microlens substrate 2 using a hand or a tool. Further, when the curing of the adhesive has not progressed much, the substrate 3 of the liquid crystal display panel 1 and the microlens substrate 2 can be separated by hand or tool, but as shown in FIG. On the upper surface of the bonding surface between the substrate 3 of the display panel 1 and the microlens substrate 2,
Since the opening end of the upper lid 9 is located, the microlens substrate 2
Hits the top lid 9 and is difficult to peel off. If this is forcibly peeled off, the microlens substrate 2 will be rubbed against the opening end of the upper lid 9 to damage the microlens surface, or the uncured adhesive will adhere to the upper lid 9.

An object of the present invention is to solve the above-mentioned problem and to provide a peeling device capable of easily peeling a microlens substrate from a liquid crystal display panel.

[0010]

According to the present invention, a liquid crystal layer is interposed between a pair of light-transmitting substrates, and the microlens substrate is separated from a liquid crystal display panel having a microlens substrate mounted on one of the substrates. In the peeling device, a base on which the liquid crystal display panel is positioned and fixed, pressing means for pressing one end surface of the microlens substrate, and the pressing means disposed on the opposite side of the microlens substrate with respect to the pressing means, And a contact piece that has an inclined surface that is inclined upward toward the downstream side in the pressing direction, and that has a tip formed at an acute angle on the substrate surface on which the microlens substrate is mounted. This is a peeling device.

[0011]

According to the present invention, a peeling device is a device for peeling a microlens substrate from a liquid crystal display panel on which a microlens substrate is mounted, and the liquid crystal display panel is positioned on a base of the peeling device. Fixed. The pressing means presses one end surface of the microlens substrate mounted on the liquid crystal display panel. The contact piece has an inclined surface that is inclined upward as it goes downstream in the pressing direction by the pressing means, the leading end surface contacts the substrate surface on which the microlens substrate is mounted, and the leading end surface has an acute angle. It is formed. The corresponding contact piece is arranged on the side opposite to the pressing means of the microlens substrate, so that the end of the microlens substrate opposite to the pressing means which is pressed by the pressing means and displaced in the pressing direction can be easily inclined. The microlens substrate can be easily separated from the substrate surface of the liquid crystal display panel by mounting on the surface.

[0012]

FIG. 1 is a perspective view showing the entire structure of a peeling apparatus 11 according to one embodiment of the present invention, and FIG.
It is sectional drawing of the cross section of the peeling apparatus 11 shown by 1. In FIG. 2, the liquid crystal display panel 1 houses a liquid crystal display element formed with a liquid crystal layer interposed between a pair of light-transmitting substrates 3 and 4 in a resin frame 5 as shown in FIG. The resin frame 5 is fixed by a metal frame 8 and an upper lid 9.

The base 14 of the peeling apparatus 11 of this embodiment has four bases.
The two legs 32 are provided, and the legs 32
Is supported. A plurality of (four in this embodiment) positioning pins 13 projecting upward are formed on the surface of the base 14, and the positioning pins 13 are formed in the pin holes 10 formed in the resin frame 5 of the liquid crystal display panel 1. By inserting 13, the liquid crystal display panel 1 is positioned and the liquid crystal display panel 1 is fixed to the base 4. The distance between the pin hole 10 and the positioning pin 13 is 0.1 mm or less,
By forming the positioning pins 13, the liquid crystal display panel 1 can be accurately positioned.

The pressing member 16 of the peeling device 11 is
2 is displaceably mounted along the guide groove 41 in the direction indicated by the arrow A in FIG. 2, and the pressing surface 16 a contacts the end surface of the microlens substrate 2 adhered to the liquid crystal display panel 1, and the arrow Aa Press in the direction. A screw mounting member 51 is mounted on a side surface of the pressing member 16 opposite to the pressing surface 16a, and one end of the screw member 20 formed to have a smaller diameter than the screw member 20 is mounted. The one end is inserted through an insertion hole formed in the screw mounting member 51, and is rotatably mounted around the rotation shaft 24 of the screw member 20. A knurled operation knob 15 is formed at the other end of the screw member 20. When the operation knob 15 rotates one turn clockwise, the screw member 20 also rotates one turn, and the pressing member 16 is displaced in the direction of the arrow Aa by the pitch of the screw member 20.

In the peeling device 11 of this embodiment, the screw member 2
0 is the screw diameter of M16, and the diameter of the operation knob 15 is 60
mm. A non-rotating bush 21 having a female screw formed on a surface that abuts the screw member 20 is attached to the screw member 20. A flange 23 is formed on the detent bush 21, and such a detent bush 21 is fitted into a hole formed on the mounting plate 22 without a gap, so that when the screw member 20 is rotated, the detent bush 2 is rotated.
1 is prevented from being displaced in the direction of arrow Ab.
6 can be displaced in the direction of the arrow Aa. The non-rotating bush 21 is not fixed to the mounting plate 22, and the operation knob 15 is pressed in the direction of the arrow Aa to thereby move the arrow Aa.
It can be displaced in any direction. Pressing member 16 and screw member 20
And the operation knob 15 constitute the pressing means 31.

FIG. 3 is a cross-sectional view of the cross section of the peeling device 11 indicated by a section line X2 in FIG. An end of the base 14 facing the pressing surface 16a via the liquid crystal display panel 1 has an L
The mounting member 18 having a U-shape is disposed in the direction of displacement of the pressing member 16 (FIG. 2).
(Direction indicated by an arrow A in FIG. 2) is pivotally supported in a direction indicated by an arrow B shown in FIG. Both ends of the pin 17 in the axial direction are mounted on the base 14.
Are supported by a pair of brackets 12 erected near the end of the bracket.

The lever 2 is attached to one end of the mounting member 18.
5 are formed. At the other end of the mounting member 18, a lever 25 is swung in the direction of arrow B shown in FIG.
When the end surface of the other end of the abutment is brought into contact with the upper lid 9 of the liquid crystal display panel 1, the distal end surface of the contact piece 19 that is inclined upward toward the downstream side in the pressing direction is on the surface of the substrate 3 of the liquid crystal display panel 1. The contact piece 19 is attached so as to abut the contact piece. In this embodiment, a stainless steel plate having a thickness of 0.2 mm is used for the abutting piece 19, the tip surface is formed at an acute angle, and the microlens substrate 2 is coated with a highly lubricious coating.
The microlens substrate 2 can be peeled from the substrate 3 of the liquid crystal display panel 1 without causing any damage to the portion that comes into contact with the contact piece 19.

FIG. 4 is a sectional view of a section of the peeling device 11 indicated by a section line X3 in FIG. The mounting plate 22 is pivotally supported in the direction of the arrow D shown in FIG. 4 by a hinge pin 28 arranged in the axial direction parallel to the pressing direction shown by the arrow Aa in FIG. Of the pair of hinge pieces 2 erected near the end of the base 14.
9 supported. A force is applied to the mounting plate 22 by a torsion spring 36 mounted on the hinge pin 28 in a direction indicated by an arrow Da in FIG. A plurality (four in this embodiment) of pin plungers 26 are respectively attached to positions of the mounting plate 22 corresponding to the plurality of positioning pins 13, and a handle 30 is mounted to a free end of the mounting plate 22. . A support column 27 having a flange 40 is fixed to one side of the base 14 with bolts penetrating the flange 40, and the mounting plate 22 is swung in the direction of the arrow Db to rotate the pin plunger 26.
When the boss 7 of the liquid crystal display panel 1 is pressed by the above, the mounting plate 22 and the upper end of the support column 27 abut, and the mounting plate 22 is supported substantially horizontally. One end of a screw rod 37 is pivotally supported on the base 14 by a pin 34 and a bracket 35 in a direction indicated by an arrow E, and the free end of the screw rod 37 has a screw knob 3.
8 is attached. As the screw rod 37 is displaced in the direction of arrow E, the screw rod 37 is fitted into the fitting groove 33 of the column 27, and the mounting plate 22 is attached to the upper end of the column 27 as described above. At the time of contact, the screw rod 37 further fits into a fitting groove 39 which is a cutout formed in the mounting plate 22. The contact portion 38a of the screw knob 38 is formed to have a diameter larger than that of the screw rod 37, and contacts the upper surface of the mounting plate 22,
The attachment plate 22 is prevented from being displaced in the direction of the arrow Da by the elastic force of the torsion spring 36.

FIG. 5 is a sectional view of a section of the pressing member 16 of the peeling device 11 indicated by a section line X4 in FIG. The pressing member 16 includes an upper plate 16c and a lower plate 16d. A bolt insertion hole 43 is provided in the upper plate 16c, and the lower plate 16d
Is provided with a screw hole 44. The upper plate 16c is the guide projection 4
After the guide protrusion 47 is fitted into the guide groove 46 of the mounting plate 22, the bolt 45 is used to hold the mounting plate 22 between the lower surface 48 of the upper plate 16c and the upper surface 49 of the lower plate 16d. It is screwed.

FIG. 6 is a sectional view of a section of the rotation preventing bush 21 of the peeling device 11 indicated by a section line X5 in FIG.
The detent bush 21 has a cylindrical shape in the direction of the axis 24 of the screw member 20, and the mounting plate 22 is formed in a fitting groove 50 provided on the cylindrical side surface of the detent bush 21 in parallel to the axis 24 of the screw member 20. The rotation of the rotation preventing bush 21 is prevented by fitting the tip portion of the rotation preventing pin 42 provided on the mounting portion 22a of the above, and when the operation knob 15 is rotated, the pressing member 16 is fitted to the rotation preventing bush 21. On the other hand, it is relatively displaced in the pressing direction.

FIG. 7 shows that the microlens substrate 2 is
FIG. 9 is a cross-sectional view showing a state where the vehicle is mounted on the vehicle. Hereinafter, a procedure for separating the microlens substrate 2 from the substrate 3 of the liquid crystal display panel 1 will be described with reference to FIGS. 1, 2, 4, and 7. First, as shown in FIG. 4, the positioning pins 13 are inserted into the pin holes 10 of the liquid crystal display panel 1 to position the liquid crystal display panel 1, and the mounting plate 22 is angularly displaced in the direction of the arrow D so that the mounting plate 22 is The boss 7 of the resin frame 5 is pressed by the pin plunger 26 until it comes into contact with the upper end of the rising portion 27 of the base 14. Further, the screw rod 37 is connected to the fitting grooves 33 and 3.
9 and turn the screw knob 38 to fix the mounting plate 22. As described above, the pin plunger 26 applies a load to the boss 7 of the resin frame 5 so that the load is directly applied to the positioning pins 13, and when the microlens substrate 2 is pressed, the liquid crystal display panel 1 is pressed. Of the liquid crystal display element and the microlens substrate 2 constituting the liquid crystal display device can be prevented from being deformed or stressed. Next, as shown by the arrow B in FIG.
After the tip of the contact piece 19 is brought into contact with the surface of the substrate 3 of the liquid crystal display panel 1, the operation knob 15 is rotated clockwise or the operation knob 15 is moved in the direction of the arrow Aa. The microlens substrate 2 is pressed to bring the pressing surface 16a into contact with the end surface of the microlens substrate 2.

When the curing of the adhesive is progressing, the shearing force between the substrate 3 of the liquid crystal display panel 1 and the microlens substrate 2 is 10 kgw or more. LCD panel 1
Is difficult to separate from the substrate 3. Therefore, the operation knob 15 is rotated clockwise until the microlens substrate 2 moves without resistance, and when the microlens substrate 2 starts moving, the operation knob 15 is pressed in the direction of the arrow Aa, and FIG. As shown, the pressing surface 16 of the pressing member 16
The operation knob 15 is turned to the arrow A until the opposite end of the microlens substrate 2 with which the
Press in direction a.

As described above, in this embodiment, the screw member 2
0 screw diameter to M16, operation knob 15 diameter 60m
Choose m. In this case, the screw pitch of the screw member 20 is p,
Assuming that the screw outer diameter is d, p = 2 mm and d = 16 mm. Assuming that the tangential force acting on the circumference of the screw member 20 is Pkgw, when rotating the operation knob 15 having a diameter of 60 mm at 2 kgw, P = {(60/2) × 2} / (16/2) =
7.5, that is, the force P acting on the screw member 20 in the tangential direction is 7.5 kgw. Assuming that the friction angle of the screw member 20 is φ and the pitch angle is θ, the pressing force Wkgw of the pressing member 16 when the operation knob 15 is turned is given by the following equation (1).

W = P / tan (θ + φ) (1) Assuming that the friction coefficient of the screw member is μ, the friction angle φ is μ =
tanφ, and the pitch angle θ is tan θ = p / π
d. In this embodiment, the friction coefficient μ is μ =
0.1 and p = 2, d = 16, so tan
φ = 0.1, tan θ = 2 / (3.14 × 16) = 0.
0398, and φ = 5 ° 40 ′ and θ = 2 ° 17 ′ are obtained. Further, as described above, the operation knob 15 is
When rotating with a tangential force of gw, the pressing force Wkgw of the pressing member 16 is calculated from the equation (1) as W = 7.5 / tan (5
° 40 '+ 2 ° 17') ≒ 53 kgw. Therefore, even when the shearing force between the liquid crystal display panel 1 and the microlens substrate 2 is 10 kgw or more, even if the operation knob 15 is turned with a force of 2 kgw, the microlens substrate 2 is sufficiently separated from the liquid crystal display panel 1. can do.

As described above, according to this embodiment, the peeling device 11 replaces the plurality of positioning pins 13 formed on the surface of the base 14 with the plurality of positioning pins 13 formed on the resin frame 5 of the liquid crystal display panel 1. The liquid crystal display panel 1 is positioned by inserting it into the corresponding pin hole 10 and fixed on the base 14. By forming the positioning pins 13 such that the distance between each of the pin holes 10 of the resin frame 5 and the positioning pins 13 is 0.1 mm or less, the liquid crystal display panel 1 can be accurately positioned.

The peeling device 11 is mounted on each boss 7 of the liquid crystal display panel 1 positioned on the base 14.
The liquid crystal display panel 1 is fixed by applying a load vertically from the opposite direction. Therefore, the load is directly applied to the positioning pin 13, and when the side end surface of the microlens substrate 2 is pressed to be separated from the liquid crystal display panel 1, deformation or stress is applied to components constituting the liquid crystal display panel 1. Can be prevented from occurring.

Further, when pressing the side end surface of the microlens substrate 2, the pressing force is applied to the operation knob 1 of the screw member 20.
5, the microlens substrate 2 can be separated from the liquid crystal display panel 1 with a small force.

Further, on the opposite side of the microlens substrate 2 with respect to the pressing member 16, there is an inclined surface which is inclined upward toward the downstream side in the pressing direction. Contact piece 1 with high coating
9, the end of the contacting piece side of the microlens substrate 2 pressed by the pressing member 16 and displaced in the pressing direction is mounted on the inclined surface of the contacting piece 19, and the adhesive surface of the microlens substrate 2 is attached. Is separated from the substrate 3 of the liquid crystal display panel 1.

As a result, it is possible to prevent the microlens substrate 2 from contacting the upper lid 9 of the liquid crystal display panel 1, and the microlenses formed on the microlens substrate 2 may be damaged, or the adhesive may be applied to the upper lid 9. Adherence can be prevented. Also, the tip surface is formed at an acute angle,
By applying a coating having high lubricity, the end of the microlens substrate 2 is mounted on the inclined surface of the contact piece 19 without resistance, and the surface of the microlens substrate 2 that contacts the contact piece 19 is damaged. Can be prevented.

[0030]

As described above, according to the present invention, the peeling device positions and fixes the liquid crystal display panel on the base, and presses one end surface of the microlens substrate mounted on the liquid crystal display panel with the pressing means. Press with. Further, on the opposite side of the microlens substrate with respect to the pressing means, a contact piece having an inclined surface which is inclined upward toward the downstream side in the pressing direction of the pressing means, the tip of which is formed at an acute angle is arranged. I do.

Therefore, the pressing means is pressed by the pressing means,
The microlens substrate displaced in the pressing direction can easily be mounted on the inclined surface, and the microlens substrate can be separated from the liquid crystal display panel. Further, since the tip of the contact piece is formed at an acute angle, the adhesive surface can be more easily peeled off.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire configuration of a peeling device 11 according to one embodiment of the present invention.

FIG. 2 is a sectional view of a section of the peeling device 11 indicated by a section line X1 in FIG.

FIG. 3 is a sectional view of a section of the peeling device 11 indicated by a section line X2 in FIG.

FIG. 4 is a sectional view of a section of the peeling device 11 indicated by a section line X3 in FIG.

FIG. 5 is a cross-sectional view of a cross section of the pressing member 16 of the peeling device 11 indicated by a cutting plane line X4 in FIG.

FIG. 6 is a cross-sectional view of a cross section of the rotation preventing bush 21 of the peeling device 11 indicated by a cutting plane line X5 in FIG.

FIG. 7 is a cross-sectional view showing a state where the microlens substrate 2 is mounted on the contact piece 19.

FIG. 8 is a cross-sectional view of a liquid crystal display panel 1 including a microlens substrate 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel 2 Microlens substrate 11 Peeling device 13 Positioning pin 14 Base 16 Pressing part 19 Contact piece 20 Screw part 21 Detent bush 22 Mounting plate 26 Pin plunger

Claims (1)

(57) [Claims] 1. A peeling device for separating a microlens substrate from a liquid crystal display panel on which a microlens substrate is mounted on one of the substrates, wherein a liquid crystal layer is interposed between a pair of light-transmitting substrates. A base that is positioned and fixed; pressing means for pressing one end surface of the microlens substrate; disposed on the opposite side of the microlens substrate with respect to the pressing means and downstream of the pressing direction by the pressing means And a contact piece having an acute angle formed on the surface of the substrate on which the microlens substrate is mounted, the contact piece being in contact with the microlens substrate.