JP2017187635A - Manufacturing apparatus of display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take countermeasure against insufficiently cured ultraviolet curable resin under a black frame of a cover glass by ultraviolet.SOLUTION: There is provided a manufacturing apparatus of a display device 400 comprising: a display panel; and a cover glass including a transparent part and a black frame, bonded to the display device by ultraviolet curable resin. The manufacturing apparatus comprises: a light source 10 emitting ultraviolet; a mounting table 50 on which the display device is mounted; a curved surface mirror 20 arranged covering the light source 10 opposite the mounting table 50; and an optical path changing element 30 changing an optical path of ultraviolet from the light source 10, arranged closer to the mounting table 50 than the light source 10. An angle formed between ultraviolet from the optical path changing element 30 and a principal surface of the display device 400 is smaller than an angle formed between ultraviolet reflected by the curved surface mirror 20 and the principal surface of the display device 400.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a display device manufacturing apparatus, and more particularly to a manufacturing apparatus for bonding a cover glass to a display panel using an ultraviolet curable resin.

  A flat display such as a liquid crystal display device or an organic EL display device is thin and lightweight, and therefore, there is an increasing demand for a portable display such as a mobile phone. A cover glass is disposed on the liquid crystal display device or the organic EL display device for mechanical protection. The present invention relates to adhesion of a cover glass to a display panel. In this specification, a liquid crystal display device is mainly described, but the present invention can also be applied to an organic EL display device.

  In a liquid crystal display device, a TFT substrate in which pixel electrodes and thin film transistors (TFTs) are formed in a matrix and a counter substrate are arranged opposite the TFT substrate, and liquid crystal is sandwiched between the TFT substrate and the color filter substrate. It has become. An image is formed by controlling the light transmittance of the liquid crystal molecules for each pixel.

  In order to adhere the cover glass to the surface of the liquid crystal display panel, an ultraviolet curable resin is used. There is an example in which an ultraviolet curable resin is used for bonding a seal portion between a TFT substrate and a counter substrate in a liquid crystal display panel. As an example in the case of using an ultraviolet curable resin as a sealing material, Patent Document 1. Patent document 2 and patent document 3 are mentioned.

Japanese Patent No. 05417545 JP 2005-208479 A JP 2014-235278 A

  A black frame (hereinafter referred to as a black frame) is formed on the cover glass bonded to the surface of the liquid crystal display panel by printing or the like because of a demand for design. The adhesive includes a thermosetting resin and an ultraviolet curable resin, and an ultraviolet curable resin having a short curing time is used as an adhesive for bonding the cover glass and the liquid crystal display panel.

  Although the ultraviolet rays are irradiated to the main surface side of the cover glass, the resin is difficult to cure because the ultraviolet rays do not pass through the black frame portion. If uncured resin is present, the resin may flow out or bubbles may be generated. The resin may initially be in the form of a sheet, but if it is not cured, a sufficient adhesive force will not be generated, which causes a problem of peeling between the cover glass and the liquid crystal display panel.

  Further, if there are a portion where the resin is cured and a portion where the resin is not cured, uneven stress occurs on the counter substrate of the liquid crystal display panel, and this is the distance between the TFT substrate and the counter substrate in the liquid crystal display panel, that is, the layer of the liquid crystal layer. It may affect the thickness and cause color unevenness.

  An object of the present invention is to cure an ultraviolet curable resin for bonding a liquid crystal display panel and a cover glass even in a black frame portion of the cover glass, and to cure the ultraviolet curable resin on the entire surface of the liquid crystal display panel and the cover glass. .

  The present invention solves the above-mentioned problems, and typical configurations are as follows.

  (1) An apparatus for manufacturing a display device in which a display panel, a cover glass having a transparent portion and a black frame are bonded by an ultraviolet curable resin, a light source that emits ultraviolet light, and a mounting table on which the display device is mounted A curved mirror is disposed so as to cover the light source on the side opposite to the mounting table with respect to the light source, and an optical path changing element is disposed on the mounting table side before the light source, and reflected ultraviolet rays from the optical path changing element An apparatus for manufacturing a display device, characterized in that an angle formed with the main surface of the display device is smaller than an angle formed between the main surface of the display device and ultraviolet light that reflects the curved mirror.

  (2) The display device manufacturing apparatus according to (1), wherein the mounting table is a conveyor that moves the display device in a first direction.

  (3) The light source has a cylindrical shape having a major axis in a second direction perpendicular to the first direction, and the curved mirror is disposed so as to cover the light source ( A display device manufacturing apparatus according to 2).

It is a top view of a liquid crystal display device. It is AA sectional drawing of FIG. It is sectional drawing which shows the example of the apparatus which hardens ultraviolet curing resin with an ultraviolet-ray. It is sectional drawing which shows the problem in the case of hardening | curing ultraviolet curable resin with an ultraviolet-ray with the apparatus of FIG. It is an example which shows the ultraviolet-ray for hardening the ultraviolet curable resin of a black frame part. It is sectional drawing which shows the example of the ultraviolet irradiation device by this invention. It is a schematic diagram which shows the optical path of the ultraviolet-ray in FIG. It is a top view which shows the example of the ultraviolet irradiation device by this invention. 3 is a graph showing an angular distribution of ultraviolet intensity in Example 1. It is sectional drawing of the orthogonal | vertical direction with FIG. 6 which shows the example of the ultraviolet irradiation device by this invention. It is sectional drawing which shows the whole structure of the ultraviolet irradiation device by this invention. It is sectional drawing which shows the optical path of the ultraviolet-ray at the time of using an elliptical reflecting mirror. It is sectional drawing which shows the example of the ultraviolet irradiation device of Example 2. 6 is a graph showing an angular distribution of ultraviolet intensity in Example 2. It is sectional drawing of an organic electroluminescence display. It is sectional drawing which shows the problem of hardening of the ultraviolet curable resin in an organic electroluminescence display.

  Hereinafter, the present invention will be described in detail using examples.

  FIG. 1 is a plan view of a liquid crystal display device, and FIG. 2 is a cross-sectional view of the liquid crystal display device. In FIG. 1, a cover glass 300 is disposed on the upper side of the liquid crystal display panel. The cover glass 300 is formed larger than the TFT substrate 100 in the liquid crystal display panel, but this is an example, and the cover glass 300 may be the same size as the liquid crystal display panel or may be smaller than the liquid crystal display panel. is there.

  In FIG. 1, a black frame 301 is formed by printing around a cover glass so as to surround a transparent display region 302. The black frame 301 is formed on the counter substrate 200 side of the cover glass 300. The width of the black frame 301 is larger on the terminal portion side where the main flexible wiring board 120, the driver IC 110, etc. are arranged in the liquid crystal display panel.

  2 is a cross-sectional view taken along the line AA in FIG. In FIG. 2, the TFT substrate 100 and the counter substrate 200 are bonded by a sealing material, and the liquid crystal is sandwiched between the TFT substrate 100 and the counter substrate 200. The TFT substrate 100 is formed to be larger than the counter substrate 200. A portion where the TFT substrate 100 is a single portion is a terminal portion, a driver IC 110 for driving the liquid crystal display panel is disposed, and an external portion is provided. A main flexible wiring board 120 for supplying power and signals from is connected. The counter substrate 200 has a touch panel function, and a touch panel flexible wiring substrate 130 is connected to the counter substrate 200 in order to input and output signals to and from the touch panel.

  A lower polarizing plate 101 is attached to the lower side of the TFT substrate 100, and an upper polarizing plate 201 is attached to the upper side of the counter substrate 200. The TFT substrate 100, the counter substrate 200, the lower polarizing plate 101, and the upper polarizing plate 201 constitute a liquid crystal display panel. A cover glass 300 is attached on the upper polarizing plate 201 with a resin 350. This is for mechanically protecting the liquid crystal display panel.

  In FIG. 2, the thickness of the cover glass 300 is not less than 0.5 mm and not more than about 1.5 mm. Moreover, the thickness of the TFT substrate 100 and the counter substrate 200 is about 0.2 mm to 0.7 mm, and the thickness of the upper polarizing plate 201 and the lower polarizing plate 101 is about 0.13 mm. The thickness of the ultraviolet curable resin 350 bonding the upper polarizing plate 201 and the cover glass 300 is about 30 μm to 170 μm.

  The ultraviolet curable resin 350 may be initially a liquid with a high viscosity or a film. For example, OCA (Optical Clear Adhesive) is used as the resin film, and OCR (Optical Clear Resin) is used as the initial liquid resin, for example. In the following description, the ultraviolet curable resin 350 is described as being liquid before curing, but the contents of the invention can be similarly applied to the case where the ultraviolet curable resin 350 is initially a sheet.

  FIG. 3 is a cross-sectional view of an ultraviolet irradiation device for curing the ultraviolet curable resin in FIG. 1 or FIG. In FIG. 3, a light source 10 is a metal halide lamp, and has a cylindrical shape that is long in the direction perpendicular to the paper surface. The metal halide lamp emits ultraviolet light UV having a wavelength of 356 nm. The ultraviolet light UV from the light source 10 is converted into parallel light by the parabolic reflecting mirror 20 and enters the main surface of the liquid crystal display device 400 perpendicularly.

  On the other hand, the liquid crystal display device 400 is placed on the conveyor 50 and moves from left to right. Therefore, while the liquid crystal display device 400 moves in the irradiation device, the ultraviolet ray UV is irradiated and the ultraviolet curable resin is cured.

  However, when ultraviolet rays UV are irradiated as shown in FIG. 3, the problem shown in FIG. 4 occurs. FIG. 4 is a cross-sectional view of the liquid crystal display device. In FIG. 4, ultraviolet UV for curing the ultraviolet curable resin 350 is irradiated from the main surface side of the cover glass 300. In FIG. 4, in the transparent display area where the black frame 301 does not exist, since the ultraviolet ray UV is irradiated, the ultraviolet curable resin 350 is cured. However, in the portion where the black frame 301 is formed, the ultraviolet ray UV is not transmitted, and thus the ultraviolet curable resin 350 is not cured. This portion is indicated by an uncured resin 351 in FIG.

  In order to prevent this, as shown in FIG. 5, it is necessary to irradiate ultraviolet rays UV also from the lateral direction. In order to irradiate such ultraviolet rays UV, it is necessary to irradiate ultraviolet rays UV from four directions of the liquid crystal display device in addition to the light source shown in FIG. However, when there are a plurality of ultraviolet light sources, it is necessary to adjust the ultraviolet rays for each light source, which complicates the apparatus. In addition, the maintenance of the apparatus becomes complicated and the manufacturing cost increases.

  FIG. 6 is a cross-sectional view of an ultraviolet irradiation apparatus according to the present invention. Hereinafter, the ultraviolet ray UV may be simply referred to as light. In FIG. 6, ultraviolet light UV having a wavelength of 356 nm is emitted from a light source 10 using a metal halide lamp. A parabolic reflecting mirror 20 is disposed so as to cover the light source 10, and the ultraviolet light UV from the light source 10 becomes parallel light and travels toward the liquid crystal display device 400. The feature of the present invention is that the optical path changing element 30 is arranged in a part of the light region from the light source 10 and the parabolic reflector 20, and a part of the parallel light is at a small angle with respect to the main surface of the liquid crystal display device 400. It is to form ultraviolet rays UV incident on. The small angle is, for example, 10 ° or less.

  In FIG. 6, a part of the light from the parabolic reflector 20 enters the optical path changing element 30 and enters the liquid crystal display device 400 at a small angle η2.

  On the other hand, part of the light incident on the optical path changing element 30 enters the liquid crystal display device 400 perpendicularly as parallel light. Accordingly, it is possible to simultaneously obtain ultraviolet rays for curing the ultraviolet curable resin under the black frame of the cover glass and ultraviolet rays for curing the ultraviolet curable resin corresponding to the transparent portion other than the black frame.

  The angle η2 of the ultraviolet UV incident on the liquid crystal display device 400 can be arbitrarily changed by changing the structure inside the optical path changing element 30. FIG. 7 shows an example. In FIG. 7, the first mirror 35 is inclined by η1 with respect to the vertical direction of the main surface of the liquid crystal display device 400. On the other hand, the second mirror 40 is perpendicular to the main surface of the liquid crystal display device 400. At this time, the angle η2 of the light reflected by the second mirror 40 with respect to the main surface of the liquid crystal display device 400 is η2 = η1 / 2.

  FIG. 7 is an example. For example, even when the inclination η1 of the first mirror 35 is set to 45 ° and the angle of the second mirror 40 is slightly inclined, the angle with respect to the main surface of the liquid crystal display device 400 is small. Can be obtained. In FIG. 7, the first mirror 35 and the second mirror 40 are plane mirrors, but may be curved mirrors or polygon mirrors as necessary.

  Further, the optical path changing element 30 has an internal structure that can change the optical path of the light beam in the direction perpendicular to the main surface of the liquid crystal display device 400 by using not only a mirror but also a prism, for example.

  FIG. 8 is a plan view of the ultraviolet irradiation apparatus shown in FIG. In FIG. 8, a parabolic reflecting mirror 20 is disposed so as to cover the light source 10. The external shape of the light source 10 is an elongated cylinder. An optical path changing element 30 is disposed below the parabolic reflecting mirror 20.

  In FIG. 8, the liquid crystal display device 400 is disposed on the conveyor 50. As the conveyor 50 moves from left to right, the UV light is irradiated on the liquid crystal display device 400 below the parabolic reflector 20. In FIG. 8, the liquid crystal display devices 400 are arranged in four rows on the conveyor 50. That is, the four liquid crystal display devices 400 undergo ultraviolet curing simultaneously.

  FIG. 9 is a graph showing the angular distribution of the intensity of ultraviolet rays incident on the liquid crystal display device in the ultraviolet irradiation device shown in FIG. In FIG. 9, the horizontal axis represents the angle θ, and the vertical axis represents the intensity I of the ultraviolet rays. In FIG. 9, θ is an angle with respect to the normal direction of the liquid crystal display device, and is an incident angle of ultraviolet rays. FIG. 9 shows a case where ultraviolet rays are collimated relatively high by a parabolic reflector. As shown in FIG. 6, the angular distribution of ultraviolet rays varies depending on the location of the irradiation device. FIG. 9 shows an integrated value of ultraviolet rays irradiated while the liquid crystal display device moves in the ultraviolet irradiation device.

  In FIG. 9, the incident angles of the ultraviolet rays that are directly incident on the liquid crystal display device from the parabolic reflector are distributed in the range of + 10 ° to −10 °. This portion is displayed as region A in FIG. Region A indicates the intensity of ultraviolet light that cures the ultraviolet curable resin in the transparent region of the cover glass.

  On the other hand, the incident angle of the ultraviolet UV incident on the liquid crystal display device 400 from the optical path changing element 30 is distributed between + 70 ° and + 90 °, or between −70 ° and −90 °. This region is indicated by region B in FIG. Region B indicates the intensity of ultraviolet rays that cure the corresponding ultraviolet curable resin under the black frame of the cover glass.

  Conventionally, the area B is almost zero, but the ultraviolet ray in the area B can be obtained simultaneously with the area A by using the ultraviolet exposure apparatus of the present invention. That is, the region B can be made larger than zero. On the other hand, since the feature of the present invention is to obtain the ultraviolet rays in the region A and the ultraviolet rays in the region B at the same time, it is problematic to increase only one of them. Preferably, the area of the region B is 10% or more and 50% or less of the area of the region A, and more preferably 10% or more and 30% or less.

  FIG. 6 is a cross-sectional view of the ultraviolet irradiation device in a direction parallel to the direction in which the liquid crystal display device 400 passes through the ultraviolet irradiation device. In this direction, since the light source 10 is almost a point light source, the ultraviolet irradiation angle is particularly problematic. On the other hand, the state of the ultraviolet irradiation device in the direction perpendicular to FIG. 6 is different from that in FIG.

  FIG. 10 is a cross-sectional view of the ultraviolet irradiation device in a direction perpendicular to the direction in which the liquid crystal display device 400 passes through the ultraviolet irradiation device. In FIG. 10, the conveyor 50 and the liquid crystal display device 400 move in the direction perpendicular to the paper surface. As shown in FIG. 10, the light source 10 is a linear light source in this direction. Therefore, even when the optical path changing element 30 is not present, it is possible to obtain ultraviolet rays UV incident at a small angle as indicated by η3. However, the second mirror 40 should be present in order to prevent the ultraviolet rays UV from leaking from the apparatus.

  FIG. 11 is a cross-sectional view showing the entire ultraviolet irradiation apparatus. In FIG. 11, the conveyor 50 flows from the left to the right, and accordingly, the liquid crystal display device 400 moves in the ultraviolet irradiation device from the left to the right. The ultraviolet irradiation device of the present invention forms ultraviolet rays with a small angle. Therefore, it is important to prevent ultraviolet rays from leaking outside the apparatus.

  In FIG. 11, the liquid crystal display device enters the ultraviolet irradiating device through the shield 70 for shielding ultraviolet rays twice. The shield 70 has a “warm” shape made of a material that shields ultraviolet rays. The housing 60 of the ultraviolet irradiation device has a ridge 61 at the entrance and the exit, and a shield is formed at the base of the ridge and the tip of the ridge. In other words, in FIG. 11, leakage of ultraviolet rays to the outside is prevented by arranging double shields 70 at the entrance and exit of the housing 60.

  In Example 1, a parallel light beam is formed using a parabolic reflecting mirror as a reflecting mirror for the light source. In this embodiment, an elliptical reflecting mirror 80 is used as a reflecting mirror, and the reflected light from the reflecting mirror is given an angular distribution. FIG. 12 is a cross-sectional view showing the distribution of ultraviolet rays reflected from the elliptical reflecting mirror 80 when the elliptical reflecting mirror 80 is used. In FIG. 12, in order not to make the figure complicated, the reflection of light from only one elliptical reflecting mirror is shown.

  In FIG. 12, the liquid crystal display device 400 is placed on the conveyor 50 and moves from the left side to the right side in the figure. As shown in FIG. 12, the ultraviolet rays from the light source 10 arranged at the first focal point of the elliptical reflecting mirror 80 are focused on the second focal point 81 and then diverge. Therefore, the light passing through the second focal point 81 has an angular distribution. In some cases, it is more advantageous to have an angular distribution than a perfect collimated light because a shadow against ultraviolet rays is less likely to appear. However, even if an elliptical reflecting mirror 80 as shown in FIG. 12 is used, it is difficult to make ultraviolet rays UV enter under the black frame 301 of the cover glass 300 as shown in FIG.

  FIG. 13 is a cross-sectional view showing the second embodiment. FIG. 13 also shows only the operation of the elliptical reflecting mirror on one side so as not to complicate the figure. In FIG. 13, the liquid crystal display device 400 is placed on the conveyor 50 and moves from the left side to the right side in the figure. In FIG. 13, the ultraviolet UV reflected by the elliptical reflecting mirror 80 is focused at the second focal point 81 and then diverges. In FIG. 13, the optical path changing element 30 is disposed at a location past the second focus 81.

  In FIG. 13, part of the ultraviolet light that has passed the second focal point 81 is incident on the optical path changing element 30, and ultraviolet light UV incident on the liquid crystal display device 400 at a small angle can be obtained. In FIG. 13, since ultraviolet rays UV of various angles are incident on the optical path changing element 30, various angles are also generated in the ultraviolet UV emitted from the optical path changing element 30. A part of the light reflected by the elliptical reflecting mirror 80 is directly incident on the liquid crystal display device 400 without entering the optical path changing element 30.

  As described above, in the second embodiment, compared to the first embodiment, the incident angle distribution of the ultraviolet UV with respect to the liquid crystal display device 400 can be widened. FIG. 14 is a graph showing the angular distribution of the intensity of ultraviolet UV incident on the liquid crystal display device 400 in the ultraviolet irradiation apparatus of FIG. In FIG. 14, θ is an angle with respect to the normal direction of the liquid crystal display device, and is an incident angle of ultraviolet rays UV. As shown in FIG. 13, the angular distribution of ultraviolet rays UV varies depending on the location of the irradiation device. FIG. 14 shows an integrated value of the ultraviolet rays UV irradiated while the liquid crystal display device 400 moves in the ultraviolet irradiation device.

  In FIG. 14, when θ is zero, it is a trough of the intensity I of ultraviolet rays. This is because, as shown in FIG. 13, since the optical path changing element 30 is disposed at a location past the focal point of the elliptical reflecting mirror 80, ultraviolet rays that are directly incident in the normal direction of the liquid crystal display device 400 are eliminated. is there. In FIG. 14, the reason why the ultraviolet intensity I does not become zero when θ is zero is that the ultraviolet UV is dispersed without being completely collimated.

  In FIG. 14, a region A indicates the intensity of ultraviolet light that cures the ultraviolet curable resin in the transparent region of the cover glass. Region B shows the intensity of the ultraviolet rays for curing the ultraviolet curable resin in the portion under the black frame of the cover glass. Since the feature of the present invention is to obtain the ultraviolet ray UV in the region A and the ultraviolet ray UV in the region B at the same time, it is problematic to increase only one of them. Preferably, the area of the region B is 10% or more and 50% or less of the area of the region A, and more preferably 10% or more and 30% or less.

  FIG. 14 is an example, and the intensity distribution of the ultraviolet ray UV can be easily changed by the arrangement position of the mirror or the like in the optical path changing element 30. In FIG. 13, the structure inside the optical path changing element 30 may be a plane mirror, a curved surface, a polygonal mirror, or a prism.

  Note that the contents described in FIGS. 10 and 11 of the first embodiment can also be applied to this embodiment.

  In this embodiment, the present invention is applied to an organic EL display device. FIG. 15 is a cross-sectional view of an organic EL display device. The organic EL display panel has a configuration in which an element substrate 500 on which an organic EL element or the like is formed is covered with a sealing substrate 600 via a sealing resin. The element substrate 500 is formed larger than the sealing substrate 600, the driver IC 110 is attached to a portion where the element substrate 500 is a single piece, and a main flexible for supplying power and signals to the organic EL display panel. A wiring board 120 or the like is connected.

  The sealing substrate 600 also serves as a touch panel, and the touch panel flexible wiring substrate 130 is connected to the sealing substrate 600. A polarizing plate 601 for preventing reflection is attached on the sealing substrate 600. However, a polarizing plate for preventing reflection may not exist depending on the organic EL display device.

  In FIG. 15, a cover glass 300 for protecting the organic EL display panel is bonded onto the sealing substrate 600 via an ultraviolet curable resin 350. The black frame 301 is formed around the cover glass 300 as in the case of the liquid crystal display device shown in FIGS.

  That is, even in the case of an organic EL display device, there arises a problem that the ultraviolet curable resin 350 under the black frame 301 of the cover glass 300 is not cured. FIG. 16 is a cross-sectional view showing this problem in the organic EL display device. FIG. 16 is the same as FIG. 4 described in the liquid crystal display device. Therefore, the configuration of the present invention described in the first and second embodiments can be applied to the organic EL display device.

  DESCRIPTION OF SYMBOLS 10 ... Light source, 20 ... Parabolic reflecting mirror, 30 ... Optical path changing element, 35 ... 1st mirror, 40 ... 2nd mirror, 50 ... Conveyor, 60 ... Housing | casing, 61 ... 庇, 70 ... Shield, 80 ellipse Reflecting mirror, 81 ... second focus, 100 ... TFT substrate, 101 ... lower polarizing plate, 110 ... driver IC, 120 ... main flexible wiring substrate, 130 ... flexible wiring substrate for touch panel, 200 ... counter substrate, 201 ... upper polarizing plate , 300: Cover glass, 301: Black frame, 302: Display area, 350: UV curable resin, 351: Uncured portion, 400: Liquid crystal display device, 500: Element substrate, 600: Sealing substrate, 601: Antireflection polarization Board, UV ... UV

Claims (10)

An apparatus for manufacturing a display device in which a display panel, a cover glass having a transparent portion and a black frame are bonded with an ultraviolet curable resin,
A light source that emits ultraviolet light; and a mounting table on which the display device is mounted;
A curved mirror is disposed so as to cover the light source on the side opposite to the mounting table with respect to the light source,
An optical path changing element is arranged on the mounting table side before the light source,
Manufacturing of a display device characterized in that an angle formed between the ultraviolet ray from the optical path changing element and the main surface of the display device is smaller than an angle formed between the ultraviolet ray reflecting the curved mirror and the main surface of the display device. apparatus.   The display device manufacturing apparatus according to claim 1, wherein the mounting table is a conveyor that moves the display device in a first direction.   3. The light source according to claim 2, wherein the light source has a cylindrical shape having a long axis in a second direction perpendicular to the first direction, and the curved mirror is disposed so as to cover the light source. The manufacturing apparatus of the display apparatus of description. The angular distribution of the irradiation amount of the ultraviolet rays when the display device passes through the manufacturing device is the first region in a range where the angle with the normal direction of the display device is small and the normal direction of the display device. A second region having a large angle range,
2. The display device manufacturing apparatus according to claim 1, wherein the strength of the second region is greater than zero and is 50% or less of the strength of the first region. 3. The angular distribution of the irradiation amount of ultraviolet rays when the display device passes through the manufacturing device is the first region in a range where the angle with the normal direction of the display device is small and the normal direction of the display device. A second region having a large angle range,
2. The display device manufacturing apparatus according to claim 1, wherein the strength of the second region is 10% or more and 50% or less of the strength of the first region. 3. The manufacturing apparatus has a housing, the display device has an entrance into the housing, and the display device has an exit from the housing,
At the entrance and the exit, a ridge is formed on the housing,
2. The display device manufacturing apparatus according to claim 1, wherein a shielding body made of a material that shields the ultraviolet rays is formed at both the tip of the heel and the base of the heel. 3.   The display apparatus manufacturing apparatus according to claim 1, wherein the curved mirror is a parabolic reflecting mirror.   The display apparatus manufacturing apparatus according to claim 1, wherein the curved mirror is an elliptical reflecting mirror.   The display device manufacturing apparatus according to claim 1, wherein the display panel is a liquid crystal display panel.   The display device manufacturing apparatus according to claim 1, wherein the display panel is an organic EL display panel.

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