JP2014092570A - Manufacturing device and manufacturing method of display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of easily producing a display device having an intended cell gap.SOLUTION: A manufacturing method of a display device related to one embodiment of the present invention comprises steps of:providing a display material (e.g., liquid crystal 9) within a display area A1 surrounded by a photocurable adhesive agent 8 in a first substrate 5;laminating a second light-transmissive substrate 6 on the first substrate 5 to form a laminate 7;providing a first substrate pressing part 4 on the opposite side of the second substrate 6 with respect to the first substrate 5;providing a second substrate pressing part 3 including a light transmissive part 12 and a light shielding part 13 on the opposite side of the first substrate 5 with respect to the second substrate 6, making the light transmissive part 12 correspond to an arrangement area of the adhesive agent 8, and making the light shielding part 13 correspond to the display area A1; and radiating light on the light transmissive part 12 of the second substrate pressing part 3 while pressing the laminate 7 with the first substrate pressing part 4 and the second substrate pressing part 3.

Description

  The present invention relates to a display element manufacturing apparatus and manufacturing method, and more particularly, to a display element manufacturing apparatus and manufacturing method in which a first substrate and a second substrate are laminated via a photocurable adhesive.

  A liquid crystal display element composed of a liquid crystal layer and two substrates sandwiching the liquid crystal layer is widespread and widely used, and is used not only in a liquid crystal television but also in an image projection apparatus such as a projector. In recent years, by using microprojection or microdisplay technology such as LCOS (Liquid Crystal On Silicon), miniaturization of the reflective liquid crystal display element and the image display device itself is progressing.

  In such a liquid crystal display element, not only each component such as various substrates, liquid crystal layers, or adhesives and their materials, but also a manufacturing apparatus and a manufacturing method that consider the quality and productivity of the liquid crystal display element are also important. . For example, Patent Document 1 describes a manufacturing apparatus and a manufacturing method of a liquid crystal display element that have high image quality and high productivity and that reduce costs.

  In the manufacturing method described in Patent Document 1, a seal adhesive is applied around the display area of a silicon IC (Integrated Circuit) substrate, and liquid crystal is dropped onto the display area surrounded by the seal adhesive. Next, the silicon IC substrate and the glass substrate are stacked in a vacuum state and sandwiched with a predetermined pressure. Next, the application of pressure is canceled and the pressure is increased from a vacuum state to an atmospheric pressure state, thereby reducing the cell gap between the silicon IC substrate and the glass substrate to a predetermined cell gap. Next, the sealing adhesive is cured by irradiating ultraviolet rays. Finally, the laminate of the silicon IC substrate and the glass substrate is cut.

JP 2004-177542 A

  By the way, a small liquid crystal display element as described above generally has a relatively small panel size of 0.5 to 0.9 inches. Further, the gap interval between the substrates (hereinafter also referred to as “cell gap”) is a narrow gap interval of about 1 μm to 3 μm in order to increase the liquid crystal response speed.

  In the method for manufacturing a liquid crystal display element of Patent Document 1, the seal adhesive is cured after the application of pressure is released. Therefore, there is a case where the cell gap between the silicon IC substrate and the glass substrate is widened after the application of pressure is released until the seal adhesive is cured. Therefore, in the manufacture of the liquid crystal display element having a narrow gap of about 1 μm to 3 μm as described above, there is a problem that it is difficult to realize the intended cell gap and the yield is lowered.

  An object of the present invention has been made to solve the above-described problems, and provides a display element manufacturing apparatus and a manufacturing method capable of easily manufacturing a display element having an intended cell gap. It is in.

The manufacturing method of the display element which concerns on one form of this invention is the 1st surface which has a predetermined display area | region (A1), and a 1st board | substrate (5) provided with a 2nd surface on the opposite side to the 1st surface. On the other hand, an adhesive placement step of placing a photocurable adhesive (8) on the outer periphery of the display area (A1) of the first surface, and the adhesive surrounded by the adhesive (8) of the first surface A light-transmissive second substrate (6) comprising a display material arranging step of arranging a display material (for example, liquid crystal 9) in the display region (A1), and a third surface and a fourth surface on the opposite side. The first substrate pressing portion (4) includes a laminate forming step in which the first surface is opposed to the third surface and laminated on the first substrate (5) to form a laminate (7). A first substrate pressing portion disposing step disposed on the second surface side of the substrate (5); a light transmitting portion (12); and a light shielding portion (13). The second substrate pressing portion (3) on the fourth surface side of the second substrate (6), the light transmission portion (12) corresponding to the arrangement region of the adhesive (8), and the light shielding portion (13) A second substrate pressing part arrangement step that arranges the display area (A1) so as to correspond to the display area (A1), A pressing step of pressing the laminate (7) with the first substrate pressing portion (4) and the second substrate pressing portion (3).
A display element manufacturing apparatus (1) according to an embodiment of the present invention includes a first substrate (5) having a first surface having a predetermined display area (A1) and a second surface opposite to the first surface. ) And a light-transmissive second substrate (6) having a third surface and a fourth surface on the opposite side thereof are disposed on the outer periphery of the display area (A1) and have a photo-curing adhesive ( 8) and a display material (for example, liquid crystal 9) disposed in a space formed by the first substrate (5), the second substrate (6), and the adhesive (8). A first substrate pressing portion (4) for pressing the body (7) from the second surface side of the first substrate (5), a light transmitting portion (12), and a light shielding portion (13); Light is emitted to the second substrate pressing portion (3) for pressing the laminate (7) from the fourth surface side of the second substrate (6) and the second substrate pressing portion (3). A light source (2), and the light transmitting portion (12) of the second substrate pressing portion (3) corresponds to a region where the adhesive (8) is disposed when the laminate (7) is pressed. The light shielding portion (13) is provided at a position corresponding to the display area (A1) when the stacked body (7) is pressed.
A method for manufacturing a display element according to an aspect of the present invention includes a first substrate (5) including a first surface having a predetermined display area (A1) and a second surface opposite to the first surface; A light-transmitting second substrate (6) having a third surface and a fourth surface on the opposite side is provided with a photocurable adhesive (8) disposed on the outer periphery of the display area (A1). And a laminate (7) in which a display material (for example, liquid crystal 9) is sealed in a space formed by the first substrate (5), the second substrate (6), and the adhesive (8). ) From the second surface side of the first substrate (5) by the first substrate pressing portion (4), and a light transmitting portion (12) and a light shielding portion (13). While irradiating the second substrate pressing portion (3) with light, the second substrate pressing portion (3) causes the second substrate (6) from the fourth surface side. And a second substrate pressing step for pressing the laminate (7), wherein the second substrate pressing step disposes the light transmission part (12) on the adhesive (8). The second substrate pressing portion (3) is arranged so as to correspond to the region and the light shielding portion (13) to correspond to the display region (A1).

  ADVANTAGE OF THE INVENTION According to this invention, the display element manufacturing apparatus and manufacturing method which can manufacture the display element which has the intended cell gap easily can be provided.

It is a perspective view which shows roughly the manufacturing apparatus of Embodiment 1 of this invention. It is a disassembled perspective view which shows schematically the manufacturing apparatus of Embodiment 1 of this invention. It is sectional drawing which shows schematically the manufacturing apparatus of Embodiment 1 of this invention. It is a figure which shows roughly the display area periphery in a 1st board | substrate. It is sectional drawing which shows the 2nd board | substrate press part in the manufacturing apparatus of Embodiment 1 of this invention roughly. It is sectional drawing which shows schematically the manufacturing apparatus of Embodiment 2 of this invention. It is a figure which shows in plan the area | region where a light transmissive part is formed, and the area | region where a light-shielding part is formed in the surface facing the 2nd board | substrate in the light transmissive member of a 2nd board | substrate press part. (A) is the elements on larger scale of FIG. (B) is sectional drawing of (A). (A) is the elements on larger scale of FIG. (B) is sectional drawing of (A). It is a figure for demonstrating the width dimension of the convex part of a 2nd board | substrate press part. It is a figure for demonstrating the height of the convex part of a 2nd board | substrate press part. It is sectional drawing which shows schematically the manufacturing apparatus of Embodiment 3 of this invention. It is sectional drawing which shows schematically the manufacturing apparatus of Embodiment 4 of this invention. It is sectional drawing which shows schematically the manufacturing apparatus of Embodiment 5 of this invention.

  DESCRIPTION OF EMBODIMENTS Preferred embodiments of a display element manufacturing apparatus and manufacturing method according to the present invention will be described below with reference to the drawings. Specific numerical values and the like shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not described. . In addition, for clarity of explanation, the following description and drawings are simplified as appropriate.

<Embodiment 1>
First, a display device manufacturing apparatus according to the present embodiment will be schematically described. The manufacturing apparatus of this Embodiment is used when manufacturing a liquid crystal display element, for example with a liquid crystal dropping method. The manufacturing apparatus includes a first substrate pressing unit for sandwiching a laminate in which a first substrate and a light transmissive second substrate are laminated with a predetermined pressure through a photocurable adhesive surrounding a display region. And a second substrate pressing portion. The first substrate pressing unit presses the first substrate toward the second substrate. The second substrate pressing unit presses the second substrate toward the first substrate. Here, the second substrate pressing portion includes a light transmitting portion that transmits light at a position (region) corresponding to the position of the adhesive disposed (applied) between the first substrate and the second substrate. .

  In the display element manufacturing apparatus of the present embodiment, the cell gap between the first substrate and the second substrate is maintained at a predetermined value by sandwiching the stacked body between the first substrate pressing portion and the second substrate pressing portion. Meanwhile, the adhesive can be cured by transmitting light from the light transmitting portion of the second substrate pressing portion through the light transmitting second substrate. Therefore, the cell gap adjusted by sandwiching the first substrate pressing portion and the second substrate pressing portion can be used as the cell gap after curing the adhesive. Therefore, a display element having an intended cell gap can be easily manufactured.

  Below, the manufacturing apparatus and manufacturing method of the display element of this Embodiment are demonstrated in detail. As shown in FIG. 1, the manufacturing apparatus 1 includes a light source 2, a second substrate pressing unit 3, and a first substrate pressing unit 4. The light source 2, the second substrate pressing portion 3, and the first substrate pressing portion 4 are accommodated in a chamber (not shown) in which the internal pressure can be adjusted. Then, as shown in FIG. 2, the laminated body 7 in which the first substrate 5 and the second substrate 6 are laminated is sandwiched between the second substrate pressing portion 3 and the first substrate pressing portion 4.

  A plurality of display elements are finally formed from one laminated body 7. The laminated body 7 is cut along a dividing line (not shown) after completion of bonding of the substrates described later. Then, individual display elements are formed. FIG. 3 is an enlarged cross-sectional view of a portion corresponding to one of the plurality of display elements formed in the stacked body 7. As illustrated in FIG. 3, the stacked body 7 includes a first substrate 5, a second substrate 6, an adhesive 8, and a liquid crystal 9. As shown in FIG. 2, the first substrate 5 is stacked with the second substrate 6. The first substrate 5 is provided with a plurality of <display areas A <b> 1> on the surface facing the second substrate 6. Each <display area A1> includes a plurality of pixel electrodes 10 (however, each pixel electrode is shown in a simplified manner in FIG. 2 because it is fine). In the first substrate 5 of the present embodiment, for example, a plurality of <display areas A1> are arranged in an array, and pixel electrodes 10 are arranged in an array based on a predetermined rule in each <display area A1>. The silicon IC substrate. The first substrate 5 has a disk shape.

  The second substrate 6 is a substrate having optical transparency. The second substrate 6 of the present embodiment is a glass substrate that transmits ultraviolet rays (hereinafter referred to as “UV”). The second substrate 6 has a disk shape substantially equal to the shape of the first substrate 5. The second substrate 6 includes a glass plate, and a transparent electrode film (not shown) is formed on the surface of the glass plate facing the first substrate 5. An antireflection film (not shown) is formed on the surface of the glass plate opposite to the first substrate 5. Regarding the second substrate 6, a glass substrate that transmits UV is used in the present embodiment, but any substrate that can transmit light rays (electromagnetic waves) having a wavelength capable of curing the adhesive 8 may be used.

  The adhesive 8 serves to join the first substrate 5 and the second substrate 6 and to seal the liquid crystal 9 dropped on the display area A1. The adhesive 8 has photocurability. In the present embodiment, the adhesive 8 is an adhesive having UV curability, and an adhesive generally used in a liquid crystal dropping method can be used. As shown in FIG. 4, the adhesive 8 is arranged (applied) so as to surround each <display area A <b> 1> (shown in the right-down hatching in FIG. 4). Note that, on the surface of the first substrate 5 facing the second substrate 6, either the region opposite to the <display region A <b> 1>, that is, the region outside the adhesive 8, with the adhesive 8 interposed therebetween <electrode region A <b> 2>. Is formed. In the present embodiment, an UV curable adhesive is used as an example of the adhesive 8, but the adhesive 8 may be an adhesive having a general photocurability.

  When the manufactured liquid crystal display element is mounted on an image projection apparatus such as a projector, for example, light emitted from a light source included in the image projection apparatus is received in an area where pixel electrodes are arranged. At this time, the liquid crystal display element needs to be designed so that the adhesive 8 does not block the light emitted from the light source. That is, it is necessary to prevent the adhesive 8 from being shaded when the region where the pixel electrode is disposed receives light. Similarly, it is necessary to prevent the adhesive 8 from being shaded by the reflected light from the pixel electrode. This is because when the pixel electrode is shaded, the projected image display light is damaged. In addition, it is necessary to design the applied adhesive 8 so that it does not cover the pixel electrodes when rolled by pressing both substrates.

  Therefore, as shown in FIG. 4, the interval T1 between the adhesive 8 and the display region A1 (the peripheral portion of the <display region A1> surrounded by the adhesive 8 and the end of the adhesive 8 on the <display region A1> side) Are set to be appropriate. In other words, in order to ensure the space T1 between the adhesive 8 and the display area A1, the area A3 that does not contribute to display between the display area A1 and the adhesive 8 (shown in the right-up hatching in FIG. 4). Is formed.

  Returning to FIG. 3, the liquid crystal 9 is disposed in a space surrounded by the first substrate 5, the second substrate 6, and the adhesive 8. The liquid crystal 9 changes the molecular arrangement according to the voltage applied from the pixel electrode 10 of the first substrate 5 and the transparent conductive film of the second substrate 6. As the liquid crystal 9, a liquid crystal generally used for a liquid crystal display element can be used.

  Returning to FIG. 1, the light source 2 emits UV. The light source 2 is arranged at a position where the second substrate pressing portion 3 can be irradiated with light. The light source 2 of the present embodiment is disposed on the opposite side of the first substrate pressing portion 4 with the second substrate pressing portion 3 interposed therebetween. In the present embodiment, the light source 2 uses a light source that emits UV light, but any light source that emits light rays (electromagnetic waves) having a wavelength capable of curing the adhesive 8 may be used.

  As shown in FIG. 2, the second substrate pressing unit 3 sandwiches the stacked body 7 together with the first substrate pressing unit 4. The second substrate pressing unit 3 presses the surface of the second substrate 6 opposite to the surface facing the first substrate 5. Here, the second substrate pressing portion 3 includes a light transmitting portion 12 and a light shielding portion 13 as shown in FIG.

  The second substrate pressing portion 3 according to the present embodiment forms a light shielding portion 13 on the UV transmissive light transmitting member 14, thereby transmitting light to the stacked body 7 and light traveling toward the stacked body 7. It has the area which intercepts. Hereinafter, a portion of the second substrate pressing portion 3 corresponding to a region that transmits light is referred to as a light transmitting portion 12, and a region corresponding to a region that blocks light toward the stacked body 7 is referred to as a light shielding portion 13. Here, “to make the light transmissive part correspond to the adhesive placement region” in the present invention means that the light transmissive part 12 has a position and an area covering the region where the adhesive 8 is placed. In the present invention, “to make the light shielding portion correspond to the display region” means that the light shielding portion 13 has a position and an area covering the <display region A1>.

  The light transmitting member 14 is made of quartz or non-alkali glass that transmits UV. The light transmitting member 14 has a sufficient area to cover the stacked body 7. The light transmitting member 14 has a thickness that does not deform when the stacked body 7 is pressed. In the present embodiment, the light transmitting member 14 is made to be able to transmit UV, but may be any material that can transmit light rays (electromagnetic waves) having a wavelength capable of curing the adhesive 18. The light-shielding portion 13 has substantially the same area as the <display area A1> at a position corresponding to the <display area A1> so that UV is not transmitted to the <display area A1> provided in the display element. , Provided. That is, the light shielding part 13 is formed on the second substrate pressing part 3 so as to prevent the liquid crystal 9 from being irradiated with light. On the other hand, the light shielding portion 13 has a position and an area that do not cover the region where the adhesive 8 is disposed so as not to hinder the irradiation of light to the adhesive 8.

  The light shielding portion 13 of the present embodiment is formed in an array so as to cover each <display area A1> on the surface of the light transmitting member 14 facing the second substrate 6. As a result, on the surface of the light transmitting member 14 facing the second substrate 16, the region other than the region where the light blocking portion 13 is formed becomes the light transmitting portion 12, and the light transmitting portion 12 covers all the regions where the adhesive 8 is disposed. It is arranged in a grid so as to cover.

  The light shielding unit 13 is a mask member made of metal, chromium, or the like that can shield UV light. However, the formation part and the material of the light shielding part 13 are not particularly limited as long as the light irradiation to the liquid crystal 9 is prevented and the light irradiation to the adhesive 8 is not inhibited.

  Here, the light transmitting member 14 is preferably reinforced by a frame member 15. As shown in FIGS. 1 and 5 and the like, the frame member 15 of the present embodiment includes an opening 15a, a horizontal portion 15b, and a vertical portion 15c. Specifically, an opening 15a is formed at a substantially central portion of a flat plate member having an outline that is substantially similar to the external shape of the second substrate 6, and this flat plate member serves as the horizontal portion 15b with the second substrate 6 in the light transmitting member 14. It is arranged on the surface opposite to the facing surface. And the vertical part 15c is connected with the outer periphery of the horizontal part 15b so that the side part of the 2nd board | substrate 6 may be covered. Thereby, the vicinity of the side that forms the surface opposite to the surface facing the second substrate 6 in the light transmitting member 14 is covered, and the light transmitting member 14 is reinforced. Further, the light transmitting member 14 is exposed from the opening 15a. Then, light passes through the light transmitting member 14 through the opening 15a and is irradiated on the laminate 7. The frame member 15 is fixed to the light transmission member 14.

  The frame member 15 is joined to a fixing jig (not shown) fixed to the chamber. As a result, the second substrate pressing portion 3 is supported by the fixing jig. The second substrate pressing unit 3 of the present embodiment is fixed at a position where the light from the light source 2 can be irradiated in the chamber.

  The first substrate pressing unit 4 presses the surface of the first substrate 5 opposite to the surface facing the second substrate 6. As shown in FIGS. 1 and 2, the first substrate pressing portion 4 of the present embodiment includes a spacer 16 and a press plate 17. The spacer 16 is a flat plate member having an area larger than that of the first substrate 5 in order to press the entire region of the first substrate 5. The press plate 17 is a flat plate member having an outer shape substantially equal to the outer shape of the spacer 16. A load is applied to the press plate 17 from a press device (not shown), and the press plate 17 moves to the first substrate 5 side.

  Here, as shown in FIGS. 1 and 2, the first substrate pressing unit 4 preferably includes a heating unit 18. The heating unit 18 heats the adhesive 8. The heating unit 18 of the present embodiment is formed in an outer shape that is substantially equal to the outer shape of the spacer 16. The heating unit 18 includes heating means (not shown) for heating by applying a voltage to the resistor, for example. Here, the heating means is not particularly limited. Thereby, the adhesive 8 is heated by the heating unit 18 through the spacer 16 and the first substrate 5.

  Next, a method for manufacturing a display element using the manufacturing apparatus 1 described above will be described. In this manufacturing method, first, the laminated body 7 is formed. That is, the adhesive 8 is applied to the first substrate 5 so as to surround the display area A1 of the first substrate 5, and the liquid crystal 9 is dropped on the display area A1 surrounded by the adhesive 8. And the 1st board | substrate 5 with which the liquid crystal 9 was dripped in the chamber of the manufacturing apparatus 1 is conveyed, the 1st board | substrate 5 and the 2nd board | substrate 6 are bonded together, and the laminated body 7 is formed. The second substrate 6 may be set in the chamber in advance or may be set when the first substrate 5 is transferred.

  Next, the laminate 7 is sandwiched between the second substrate pressing portion 3 and the first substrate pressing portion 4 with a predetermined pressure, and the cell gap between the first substrate 5 and the second substrate 6 is maintained at a predetermined value. The laminate 7 is irradiated with UV. Specifically, the press device is controlled to move the first substrate pressing portion 4 to the second substrate pressing portion 3 side. Since the second substrate pressing unit 3 is fixed in the chamber, the laminate 7 is sandwiched between the second substrate pressing unit 3 and the first substrate pressing unit 4. Then, the pressing apparatus is controlled so that the cell gap between the first substrate 5 and the second substrate 6 is maintained at a predetermined value.

  At the same time, the light source 2 is controlled to irradiate the laminate 7 with UV from the light source 2 as shown in FIG. At this time, since the light transmission part 12 of the second substrate pressing part 3 is provided at a position corresponding to the arrangement of the adhesive 8, UV passes through the light transmission part 12 and is applied to the adhesive 8. Accordingly, the adhesive 8 can be cured while maintaining the cell gap between the first substrate 5 and the second substrate 6 at a predetermined value. FIG. 3 schematically shows the second substrate pressing portion 3 and the first substrate pressing portion 4.

  On the other hand, since the light-shielding part 13 of the second substrate pressing part 3 is arranged so as to cover the display area A1, it is possible to prevent the liquid crystal 9 from being irradiated with UV. Therefore, deterioration of the liquid crystal 9 due to UV irradiation can be suppressed.

  Here, when the heating unit 18 is heated when the laminated body 7 is sandwiched between the second substrate pressing unit 3 and the first substrate pressing unit 4, the adhesive 8 can be heated. Thereby, the viscosity of the adhesive 8 can be reduced, and the cell gap between the first substrate 5 and the second substrate 6 can be narrowed. Therefore, a display element with a small cell gap and high response can be manufactured more easily.

  And if the laminated body 7 which the adhesive agent 8 hardened | cured was taken out from the chamber and it divided | segmented along a division line, a display element can be obtained for every <display area | region A> formed on the 1st board | substrate 5. FIG.

  The conventional manufacturing apparatus hardens the seal adhesive after releasing the application of pressure to the laminate as described above. Therefore, by releasing the pressure on the laminate, the adhesive before curing widens the cell gap between the silicon IC substrate and the glass substrate due to its elastic force. In order to intend the cell gap between the silicon IC substrate and the glass substrate, it is necessary to adjust the cell gap when pressure is applied in consideration of the spread of the adhesive due to the elastic force. However, it is extremely difficult to fully predict and control the spread of the adhesive. In addition, when the cell gap between the silicon IC substrate and the glass substrate widens in the stacking direction of the silicon IC substrate and the glass substrate, the width of the adhesive (the length of the adhesive in the direction across the adhesive) becomes narrower. In addition, the liquid crystal may be sucked into the adhesive to inhibit the curing of the adhesive. In addition, the adhesive elutes in the region where the liquid crystal is disposed, so that the response performance of the liquid crystal may be degraded, and the quality of the display image may be degraded.

  On the other hand, the manufacturing apparatus and the manufacturing method of the present embodiment irradiate the adhesive 8 with light while maintaining the cell gap between the first substrate 5 and the second substrate 6 at a predetermined value. It can be cured. Therefore, the thickness of the adhesive 8 is almost the same when the cell gap between the first substrate 5 and the second substrate 6 is maintained at a predetermined value by sandwiching the laminate 7 and when the adhesive 8 is cured. It does not change. Therefore, the cell gap between the first substrate 5 and the second substrate 6 can be accurately set to a desired value. Moreover, the liquid crystal 9 is not sucked into the adhesive 8, the adhesive 8 is cured well, and the quality of the display image is not deteriorated.

  Moreover, since the light transmission part 12 of the 2nd board | substrate press part 3 is arrange | positioned so as to correspond to arrangement | positioning of the adhesive agent 8, the adhesive agent 8 at the time of pinching | stacking the laminated body 7 can be observed. Thereby, it is also possible to observe the degree of pressing, the degree of curing, and the like on the adhesive 8.

<Embodiment 2>
The manufacturing apparatus according to the second embodiment is different from the manufacturing apparatus according to the first embodiment described above in the configuration of the second substrate pressing portion. The second substrate pressing portion in the second embodiment has a convex portion for pressing an adhesive placement (application) region in the laminate. Other configurations are substantially the same as those of the manufacturing apparatus 1 of the first embodiment. Therefore, the description which overlaps is abbreviate | omitted and demonstrates using the same code | symbol for the same element.

FIG. 6 is an enlarged cross-sectional view of a portion corresponding to one of the plurality of display elements formed in the stacked body pressed in the second embodiment. The second substrate pressing portion 22 of the manufacturing apparatus 21 shown in FIG. 6 includes a convex portion 22a that protrudes toward the second substrate 6 and has an end surface that contacts the surface of the second substrate 6 opposite to the first substrate 5. . And the end surface of the said convex part 22a is made into the position and area corresponding to the arrangement | positioning area | region of the adhesive agent 8 in a 2nd board | substrate at the time of the press of a 2nd board | substrate. As shown in FIG. 6, when the manufacturing apparatus 21 presses the stacked body 7, the convex portion 22 a of the second substrate pressing portion 22 contacts the second substrate 6. The surface of the second substrate pressing portion 22 where the convex portion 22a is in contact with the second substrate 6, that is, the end surface of the convex portion 22a can press the entire area where the adhesive 8 is disposed. It is desirable to have an area larger than the area where the adhesive 8 is disposed at a position corresponding to the area where the adhesive 8 is disposed. However, the area of the end face of the convex portion 22a is limited to a size that does not cover the area corresponding to the area where the liquid crystal 9 is disposed (dropped). In addition, the area of the end surface of the convex part 22a does not necessarily need to be larger than the area where the adhesive 8 is disposed as long as the area where the adhesive 8 is disposed can be pressed. Therefore, for example, the end surface of the convex portion 22a may have a shape that is substantially similar to the region where the adhesive 8 is disposed and has a smaller area than the region where the adhesive 8 is disposed.
On the other hand, the area | region corresponding to the area | region where the liquid crystal 9 of the laminated body 7 is arrange | positioned (dropped) at the time of the press among the 2nd board | substrate press parts 22 becomes a structure which does not contact the 2nd board | substrate 6.

  By configuring the second substrate pressing portion 22 as described above, the pressure applied by the second substrate pressing portion 22 to the stacked body 7 from the second substrate 6 toward the first substrate 5 is arranged by the adhesive 8. Therefore, the liquid crystal 9 is mainly applied to the region where the liquid crystal 9 is disposed, and is not applied to the region where the liquid crystal 9 is disposed.

  FIG. 7 is a perspective view of the light transmitting member 23 of the second substrate pressing portion 22 as viewed from above the surface facing the second substrate 6. As described above, the light transmitting member 23 of the second substrate pressing portion 22 is provided with the convex portion 22a at a position corresponding to the arrangement region of the adhesive 8 of the laminated body 7. The entire transmission member 23 is provided in a lattice beam shape as shown in FIG. Then, the region corresponding to the region where the liquid crystal 9 of the laminate 7 is arranged as shown in FIG. 6, that is, the rectangular region surrounded by the convex portions 22a provided in a lattice beam shape is blocked by the light transmitting member 23. Part 25. And the part in which the convex part 22a was provided becomes the light transmissive part 24. FIG. The light transmission part 24 is configured to protrude toward the second substrate 6 as compared with the light shielding part 25.

  As shown in FIGS. 8A and 8B, such a convex portion 22 a is a light shielding portion with respect to the reference surface 23 a of the light transmitting member 23 that comes into contact with the second substrate 6 when the stacked body 7 is pressed. It can be formed by digging down the region where 25 is formed. However, as shown in FIGS. 9A and 9B, the convex portion 22 a may be formed by projecting a region where the light transmitting portion 24 is formed with respect to the reference surface 23 a of the light transmitting member 23. it can.

  By forming the convex portions 22 a on the second substrate pressing portion 22, it is possible to concentrate and apply pressure to a region of the laminate 7 where the adhesive 8 is applied (arranged). Generally, the viscosity of the adhesive 8 is higher than the viscosity of the liquid crystal 9. Since the pressure is concentrated on the adhesive 8 having a high viscosity, the substrate 6 can be prevented from being bent at the time of pressing, and the cell gap can be secured with higher accuracy.

  Further, the formation of the convex portion 22a can prevent pressure from being applied to the region where the liquid crystal 9 is disposed when pressed. Thereby, it is possible to prevent the pixel electrode 10 and the alignment film from being damaged, and the liquid crystal 9 from entering the region where the adhesive 8 is disposed.

  As described above, the formation of the convex portion 22a makes it possible to maintain the uniformity of the cell gap, prevent the pixel electrode 10 and the alignment film from being damaged, or ensure the placement region of the liquid crystal 9 with high accuracy, and has a high quality liquid crystal display element. Can be made easier.

  Here, as shown in FIG. 10, with respect to the convex portion 22a of the second substrate pressing portion 22 of the second embodiment, the width dimension of the convex portion 22a (the length of the convex portion 22a in the direction crossing the convex portion 22a). It is preferable that T2 is set to be substantially equal to the interval between a plurality of <region A3 that does not contribute to display> adjacent to each other. Thereby, the width dimension T2 of the convex part 22a becomes wider than the width dimension T3 of the adhesive 8 (the length of the adhesive 8 in the direction crossing the adhesive 8). That is, the end portion on the <display area A1> side of the convex portion 22a is arranged on the <display area A1> side from the end portion on the <display area A1> side in the adhesive 8. Therefore, the side of the adhesive 8 can be irradiated with light favorably, and the adhesive 8 can be reliably cured. In addition, the convex portion 22a can be easily formed as compared with the case where the convex portion 22a is formed along the arrangement of the adhesives 8. Moreover, the intensity | strength of the convex part 22a is securable. However, you may form the convex part 22a along arrangement | positioning of each adhesive agent 8. FIG.

  At this time, the height of the convex portion 22a is preferably set so that the light incident on the convex portion 22a is not irradiated on the display area A1. That is, as shown in FIG. 11, the incident angle of the incident light with respect to the surface F1 (indicated by a broken line in FIG. 11) where the display surface of the display area A1 exists among the light emitted from the light source 2 and incident on the light transmitting portion 24. Considering the position P1 at which the light R having the smallest value reaches the surface F1 and the distance T4 between the end E1 of the display area A1 and the end E2 of the projection 22a on the display area A1 side, Designed. In other words, of the light emitted from the light source 2, the light R incident from the farthest to the end of the convex portion 22a on the display area A1 side is not irradiated to the display area A1, so that the liquid crystal 9 does not deteriorate. Set to

<Embodiment 3>
The manufacturing apparatus according to the third embodiment is different from the manufacturing apparatus according to the second embodiment described above in the configuration of the light shielding unit provided in the second substrate pressing unit. In the third embodiment, the second substrate pressing portion has a convex portion for pressing the adhesive placement (application) region in the laminate, and a light shielding portion is also provided on the side surface of the convex portion. Other configurations are substantially the same as those of the manufacturing apparatus 1 of the first embodiment. Therefore, the description which overlaps is abbreviate | omitted and demonstrates using the same code | symbol for the same element.

  In the manufacturing apparatus 31 shown in FIG. 12, the light shielding part 25 is also arranged on the side surface of the convex part 22a on the display area side. That is, when the second substrate pressing portion 22 presses the second substrate, the region facing the display region A1 in the second substrate pressing portion 22 is the light shielding portion 25, and the facing region, A surface that is continuous with the end surface of the second substrate 6 on the second substrate 6 that is in contact with the surface opposite to the first substrate 5 is the light shielding portion 25. Thereby, light is not emitted from the side surface of the convex portion 22a, and irradiation of light to the display area A1, that is, the liquid crystal 9 can be reliably prevented. In addition, as with the manufacturing apparatus 21 of the second embodiment, the pressure applied to the adhesive 8 can be concentrated when pressing the laminate 7, maintaining the cell gap uniformity, the pixel electrode 10, and the alignment film It is possible to prevent the damage of the liquid crystal or to secure a highly accurate arrangement region of the liquid crystal 9 and to make it easier to manufacture a high-quality liquid crystal display element.

<Embodiment 4>
The manufacturing apparatus according to the fourth embodiment is different from the manufacturing apparatus according to the first embodiment described above in that a convex portion is provided on the first substrate pressing portion. The first substrate pressing portion in the fourth embodiment has a convex portion for pressing the adhesive placement (application) region in the laminate. Other configurations are substantially the same as those of the manufacturing apparatus 1 of the first embodiment. Therefore, the description which overlaps is abbreviate | omitted and demonstrates using the same code | symbol for the same element.

  FIG. 13 is an enlarged cross-sectional view of a portion corresponding to one of the plurality of display elements formed in the stacked body pressed in the fourth embodiment. The first substrate pressing portion 42 of the manufacturing apparatus 41 shown in FIG. 13 includes a convex portion 42a that protrudes toward the first substrate 5 and has an end surface that contacts the surface of the first substrate 5 opposite to the second substrate 6. . And the said convex part 42a is made into the position and area corresponding to the arrangement | positioning area | region of the adhesive agent 8. As shown in FIG. As shown in FIG. 13, when the manufacturing apparatus 41 presses the stacked body 7, the convex portion 42 a of the first substrate pressing portion 42 contacts the first substrate 5. The surface of the first substrate pressing portion 42 where the convex portion 42a is in contact with the first substrate 5 corresponds to the region where the adhesive 8 is disposed so that the entire region where the adhesive 8 is disposed can be pressed. It has an area larger than the region where the adhesive 8 is disposed at the position where the adhesive 8 is disposed. On the other hand, the area | region corresponding to the area | region where the liquid crystal 9 of the laminated body 7 is arrange | positioned (dropped) at the time of the press among the 1st board | substrate press parts 42 becomes a structure which does not contact the 1st board | substrate 5.

  By configuring the first substrate pressing portion 42 as described above, the pressure applied by the first substrate pressing portion 42 to the stacked body 7 from the first substrate 5 toward the second substrate 6 is arranged by the adhesive 8. Therefore, the liquid crystal 9 is mainly applied to the region where the liquid crystal 9 is disposed, and is not applied to the region where the liquid crystal 9 is disposed.

  In the manufacturing apparatus 41 shown in FIG. 13, a convex portion 42 a that protrudes toward the first substrate 5 is formed on the surface of the first substrate pressing portion 42 that faces the first substrate 5. For example, the convex portion 42 a is formed along the arrangement of the adhesive 8 on the surface of the spacer 16 of the first substrate pressing portion 4 in the first embodiment that faces the first substrate 5. This makes it possible to concentrate the pressure applied to the adhesive 8 when pressing the laminated body 7, maintaining the uniformity of the cell gap, preventing damage to the pixel electrode 10 and the alignment film, or the highly accurate liquid crystal 9. As a result, it is possible to secure a high-quality liquid crystal display element.

  At this time, the convex portion 42a may be formed in a lattice beam shape like the convex portion 22a of the second embodiment. Moreover, if the spacer 16 in which the convex part 42a is formed is made of metal, the durability of the convex part 42a can be improved.

<Embodiment 5>
The manufacturing apparatus of the present embodiment is configured by combining the manufacturing apparatus 21 of the second embodiment and the manufacturing apparatus 41 of the fourth embodiment. Therefore, the description which overlaps is abbreviate | omitted and demonstrates using the same code | symbol for the same element.

  In the manufacturing apparatus 51 shown in FIG. 14, the convex portion 22 a is formed on the surface of the second substrate pressing portion 22 facing the second substrate 6, and the convex portion 42 a is formed on the surface of the first substrate pressing portion 42 facing the first substrate 5. Is formed. This makes it possible to concentrate the pressure applied to the adhesive 8 when pressing the laminated body 7, maintaining the uniformity of the cell gap, preventing damage to the pixel electrode 10 and the alignment film, or the highly accurate liquid crystal 9. As a result, it is possible to secure a high-quality liquid crystal display element.

The present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.
For example, in the above embodiment, the load is applied only to the first substrate pressing portion and the laminate 7 is sandwiched at a predetermined pressure. However, the load is applied only to the second substrate pressing portion and the laminate 7 is predetermined. Alternatively, the laminate 7 may be sandwiched at a predetermined pressure by applying a load to the first substrate pressing portion and the second substrate pressing portion.

DESCRIPTION OF SYMBOLS 1 Display device manufacturing apparatus 2 Light source 3 2nd board | substrate press part 4 1st board | substrate press part 5 1st board | substrate 6 2nd board | substrate 7 Laminated body 8 Adhesive 9 Liquid crystal 10 Pixel electrode 12 Light transmission part 13 Light-shielding part

Claims (3)

For a first substrate having a predetermined display area and a first substrate having a second surface on the opposite side of the first surface, a photo-curing adhesive is provided on the outer periphery of the display area of the first surface. An adhesive placement step to place;
A display material disposing step of disposing a display material in the display region surrounded by the adhesive on the first surface;
A light-transmitting second substrate having a third surface and a fourth surface on the opposite side is stacked on the first substrate with the third surface facing the first surface, and a stacked body is formed. A body formation step;
A first substrate pressing portion arranging step of arranging a first substrate pressing portion on the second surface side of the first substrate;
A second substrate pressing portion having a light transmission portion and a light shielding portion is arranged on the fourth surface side of the second substrate, the light transmission portion is made to correspond to the adhesive arrangement region, and the light shielding portion is arranged in the display region. A second substrate pressing portion arrangement step to be arranged so as to correspond to
A method for manufacturing a display element, comprising: a pressing step of pressing the stacked body with the first substrate pressing portion and the second substrate pressing portion while irradiating light to the light transmitting portion of the second substrate pressing portion. A light-transmissive second comprising a first surface having a predetermined display area, a first substrate having a second surface on the opposite side of the first surface, and a third surface and a fourth surface on the opposite side. A substrate is laminated via a photo-curing adhesive disposed on the outer periphery of the display region, and a display material is formed in the space formed by the first substrate, the second substrate, and the adhesive. A first substrate pressing portion that presses the disposed laminated body from the second surface side of the first substrate;
A second substrate pressing portion that has a light transmission portion and a light shielding portion and presses the laminate from the fourth surface side of the second substrate;
A light source for emitting light to the second substrate pressing portion,
The light transmitting portion of the second substrate pressing portion is provided at a position corresponding to the adhesive placement region when the laminate is pressed, and the light shielding portion is provided on the display region when the laminate is pressed. An apparatus for manufacturing a display element, which is provided at a corresponding position. A light-transmissive second comprising a first surface having a predetermined display area, a first substrate having a second surface on the opposite side of the first surface, and a third surface and a fourth surface on the opposite side. A substrate is laminated via a photo-curing adhesive disposed on the outer periphery of the display region, and a display material is formed in the space formed by the first substrate, the second substrate, and the adhesive. A first substrate pressing step of pressing the enclosed laminated body from the second surface side of the first substrate by a first substrate pressing portion;
A second substrate pressing step of pressing the laminated body from the fourth surface side of the second substrate by the second substrate pressing portion while irradiating light to the second substrate pressing portion having the light transmitting portion and the light shielding portion. A method for manufacturing a display element comprising:
In the second substrate pressing step, the second substrate pressing portion is disposed so that the light transmission portion corresponds to the adhesive placement region and the light shielding portion corresponds to the display region. A method for manufacturing a display element.

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