JP5529428B2 - ELECTRO-OPTICAL DEVICE, MANUFACTURING METHOD THEREOF, AND ELECTRONIC DEVICE - Google Patents

Description

  The present invention relates to an electro-optical device, a manufacturing method thereof, and an electronic apparatus, and more particularly, to an adhesive structure between an electro-optical panel and a light-transmitting substrate.

  Generally, when a translucent substrate such as a protective substrate such as a cover glass or an optical substrate such as a viewing angle adjusting plate is attached to an electro-optical panel such as a liquid crystal panel or an EL panel, or the electro-optical panel is translucent. In some cases, a touch panel provided with a substrate is attached. In these cases, a semi-solid transparent adhesive or UV curable sheet or tape is used to bond the electro-optical panel and the translucent substrate. The liquid transparent adhesive is used.

  As an example of the above, for example, when a transparent touch panel is bonded to the display unit, a method of fully bonding using a transfer tape made of an acrylic pressure-sensitive adhesive has been proposed (for example, see Patent Document 1 below). ). Further, a structure has been proposed in which a large number of spacers are arranged and bonded to the outer side of the display area when the function-added member is bonded to the liquid crystal display panel with a transparent adhesive (see, for example, Patent Document 2 below). ).

JP 7-105781 A JP 2008-58862 A

  However, in the method using the semi-solid transparent adhesive in the form of a sheet or tape as described in Patent Document 1, the workability of the adhesion is good, the member management is easy, and even a complicated planar shape can be easily adhered. On the other hand, it is inferior in transparency, easily affected by optical effects such as lowering the brightness, and because the adhesive layer is thick, it is difficult to reduce the thickness of the device. Depending on the surface), there is a problem that bubbles and foreign substances are likely to be mixed.

  On the other hand, the method using a liquid transparent adhesive has an advantage that it is difficult to give an optical influence because it is excellent in light transmittance, and the adhesive layer can be made thin, and is hardly affected by the surface shape of the adhesive surface. There are problems in that the bonding work becomes complicated, the amount of the adhesive is difficult to manage, and the planar shape of the bonding region is difficult to control. In particular, since the transparent adhesive sometimes protrudes around the substrate at the time of bonding, it may be necessary to scrape off the protruded adhesive after the adhesive is cured.

  Therefore, the present invention solves the above-described problems, and an object of the present invention is to realize an adhesion structure and an adhesion method that can hardly affect the optical characteristics and can facilitate the adhesion work.

In view of such circumstances, an electro-optical device of the present invention, an electro-optical panel and light-transmitting substrate which are arranged to overlap in a plane to the effective display region of the electro-optical panel having an effective display area, the A transparent counter substrate disposed opposite to the translucent substrate on the electro-optical panel side and configured to be smaller than the translucent substrate, and disposed between the translucent substrate and the counter substrate. In at least the effective display area, an input panel comprising: a transparent conductive film; and a wiring electrically connected to the transparent conductive film, wherein the translucent substrate is disposed in a region extending from an end of the counter substrate . said electric disposed between the optical panel and the input panel, the electro-optical panel and said input panel and directly or indirectly bonded to the transparent adhesive, the with the transparent adhesive and the electro-optical panel input panel Disposed between, anda peripheral wall having a partially open portion is formed in a frame shape as a whole extends along the outer edge of the effective display region, said peripheral wall, An insulating transparent material is used to cover the wiring.

  According to the present invention, when a liquid adhesive is used, by providing a peripheral wall extending along the outer edge of the effective display area, the outflow of the adhesive in the outer peripheral direction is suppressed, By providing the opening in the wall, it is possible to smoothly spread the adhesive inside the surrounding wall while avoiding the generation of bubbles, so that the workability of the bonding work can be improved.

  Here, the peripheral wall may be adhered to the surface of the electro-optical panel and the surface of the translucent substrate with a transparent adhesive, or the transparent adhesive may be electrically connected to the peripheral wall. It may be interposed between the optical panels or at least one of the peripheral wall and the translucent substrate. In the former case, the peripheral wall functions as a spacer that defines the thickness of the transparent adhesive layer between the electro-optical panel and the translucent substrate. In the latter case, the transparent adhesive may overhang the surrounding wall and protrude outward. Even if it is such an aspect, the holding effect with respect to the transparent adhesive of a surrounding wall is not necessarily lost, but the point which can make an adhesion | attachment operation | work easy is unchanged.

  In addition, the opening may be configured by a part in which a part of the peripheral wall along the outer edge of the effective display area is completely omitted, or a part in which the part is configured to be low and configured in a concave shape. It may be comprised.

In addition , since the surrounding wall is made of a transparent material, the surrounding wall will not stand out in appearance. For example, the surrounding wall may be formed within a visible range or formed in an effective display area. Since the formation position can be freely set, the position and shape of the peripheral wall can be easily optimized in order to facilitate the bonding operation. In this case, it is more desirable that the surrounding wall is made of the same material as the transparent adhesive. If it does in this way, adhesiveness with a panel, a board | substrate, and the said transparent adhesive agent can be improved.

Furthermore, the surrounding wall comprised with the insulating material coat | covers several wiring, and can further improve the tolerance with respect to the static electricity of several wiring. In particular, it is desirable that the entire area where the wiring is exposed is covered with a peripheral wall.

In still another aspect of the invention, the electro-optical panel and the input panel are configured in a rectangular shape, the peripheral wall is configured in a rectangular frame shape, and the opening is provided at a corner of the rectangular frame shape. . In general, since the effective display area is often configured in a rectangular shape, it is preferable that the electro-optical panel and the input panel also have a rectangular shape corresponding thereto. In this case, the peripheral wall is also formed in a rectangular frame shape, and the opening is formed in the corner portion, so that when the liquid adhesive is used, the air escapes from the corner portion, so that the adhesive is used during the bonding operation. Can be smoothly spread to the inside of the corner on the inside of the surrounding wall. In addition, when the electro-optical panel or the input panel is configured in a rectangular shape, when the rectangular corner portion and the corner portion of the surrounding wall are provided at corresponding positions, the edge of the panel or the substrate from the opening portion. Since a large distance to the (corner portion) can be taken, even if the adhesive protrudes outside from the opening, a large margin until it protrudes from the edge of the panel or substrate can be secured. In addition, the structure which provides an opening part in the corner | angular part of the said surrounding wall has the same meaning not only when a panel or a board | substrate is rectangular shape but when it is polygonal shape.

  In another aspect of the present invention, at least the surface of the peripheral wall is made of a silicone resin or a fluorine resin. According to this, when a liquid adhesive is used, the surface tension of the adhesive with respect to the surrounding wall can be reduced (wetting can be increased), so that the adhesive is held on the surface of the surrounding wall. Therefore, even when the surrounding wall is overcome, the protrusion of the adhesive to the outside can be suppressed.

  In this case, the entire peripheral wall may be made of a silicone resin or a fluorine resin, or the surface of another material may be coated with a silicone resin or a fluorine resin. As another method, a configuration in which the surface of the surrounding wall is coated with a surface conditioner that reduces the surface tension is also conceivable. In this case, the surface conditioner only needs to reduce the surface tension of the surrounding wall itself. For example, as a commonly used surface conditioner, an acrylic surface conditioner, a vinyl surface conditioner, a silicone type Either a surface conditioner or a fluorine-based surface conditioner can be used.

  In still another aspect of the invention, the inner surface of the peripheral wall is configured to be uneven in a direction along the outer edge of the effective display area. According to this, when the inner surface of the peripheral wall is configured to be uneven along the outer edge of the effective display area, the spread of the adhesive along the peripheral wall is suppressed when a liquid adhesive is used. Therefore, it is possible to prevent the adhesive from concentrating on the opening and protruding greatly.

  In a different aspect of the present invention, a plurality of island-shaped separation walls are arranged along the outer edge of the effective display area inside the peripheral wall. In this case, when a plurality of island-shaped separation walls are arranged along the outer edge of the effective display area on the inner side of the peripheral wall, when a liquid adhesive is used, the peripheral wall of the adhesive is aligned. Since the spread can be suppressed, it can be prevented that the adhesive concentrates on the opening and protrudes greatly.

Next, a method of manufacturing an electro-optical device of the present invention, an electro-optical panel having an effective display area, are arranged to overlap in a plane to the effective display region of the electro-optical panel, through the transparency adhesive In a method for manufacturing an electro-optical device including an input panel bonded directly or indirectly, the input panel includes a light-transmitting substrate disposed in a plane so as to overlap the effective display area of the electro-optical panel. A transparent counter substrate disposed opposite to the translucent substrate on the electro-optical panel side and configured to be smaller than the translucent substrate, and disposed between the translucent substrate and the counter substrate. A transparent conductive film that is electrically connected to the transparent conductive film, and a wiring that is disposed in a region in which the translucent substrate projects from an end of the counter substrate. any and among the input panel A peripheral wall forming step for forming a peripheral wall that extends along an outer edge of the effective display area and is formed in a frame shape as a whole and partially provided with an opening on the one side surface; An adhesive disposing step of disposing a liquid adhesive in a region corresponding to the inside of the peripheral wall on at least one of the optical panel and the input panel ; and the electric via the liquid adhesive A substrate laminating step for laminating the optical panel and the input panel ; and an adhesive curing step for curing the liquid adhesive to form the transparent adhesive , wherein the wiring is covered by the peripheral wall. Is done.

According to the present invention, since the liquid adhesive is disposed in a region corresponding to the inside of the peripheral wall after the peripheral wall is formed, the electro-optical panel and the input panel are bonded together. By preferentially spreading inward, it can be easily extended to the entire effective display area, and by providing an opening in the peripheral wall, it is possible to prevent the spread of the adhesive, and in the inner side of the peripheral wall. Air bubbles are less likely to be generated. Accordingly, an adhesive layer made of a transparent adhesive with little optical influence can be formed by using a liquid adhesive, and the adhesive can be surely spread to a necessary portion while suppressing a large protrusion of the adhesive. Therefore, the bonding operation can be easily performed.

  In one aspect of the present invention, the peripheral wall forming step includes a step of disposing a mask having an opening pattern on the surface, a step of embedding an uncured wall material in the opening pattern, and the uncured wall Curing the wall material and removing the mask. According to this, a peripheral wall can be easily formed by arranging a mask provided with an opening pattern, and embedding an uncured wall material in the opening pattern and then curing the wall material.

In this case, the mask is a light-shielding mask, the wall material is a photocurable resin, and in the stage of curing the uncured wall material, the wall material is irradiated by irradiating light from the input panel side. It is preferable to cure. According to this, after embedding an uncured wall material in the opening pattern and irradiating light from the input panel side, light is irradiated only in the opening pattern by the light-shielding mask, so that the mask surface other than the opening pattern Since the wall material made of the photo-curing resin attached to the film is hard to be cured, it is easy to remove the mask and it is also possible to prevent burrs from occurring on the surrounding wall.

  In another aspect of the invention, the wall material is preferably the same material as the liquid adhesive. By making the wall material the same material as the liquid adhesive, the transparency of the surrounding wall can be increased and the optical influence can be reduced. In addition, since the degree of freedom of the formation position of the peripheral wall can be increased, the peripheral wall can be formed in an optimal position and shape in order to optimize the spread of the liquid adhesive and prevent the protrusion.

  According to another aspect of the invention, an electronic apparatus includes the electro-optical device according to any one of the above and a control unit of the electro-optical device. Such an electronic device is not particularly limited, and examples thereof include various display devices including a display body provided with a coordinate input device (touch panel) on a display screen.

  According to the present invention, it is possible to achieve an excellent effect that it is possible to realize a bonding structure and a bonding method that can hardly affect the optical characteristics and can facilitate the bonding work.

1 is a schematic exploded perspective view schematically showing a schematic configuration of an electro-optical device according to a first embodiment. FIG. 2 is a schematic plan view illustrating a planar configuration of an adhesive surface according to the first embodiment. The schematic plan view which shows the plane structure of the adhesion surface of 2nd Embodiment. Schematic process sectional drawing (a)-(e) which shows the manufacturing method of 1st Embodiment. 1 is a schematic longitudinal sectional view showing a schematic configuration of an electro-optical device according to a first embodiment. The schematic plan view which shows the plane structure of the adhesion surface of 3rd Embodiment. FIG. 10 is a schematic longitudinal sectional view illustrating a schematic configuration of an electro-optical device according to a fourth embodiment. The schematic plan view which shows the plane structure of the adhesion surface of 5th Embodiment. The schematic plan view which shows the plane structure of the adhesion surface of 6th Embodiment. FIG. 6 is a schematic process cross-sectional view illustrating an example of a method for forming a peripheral wall according to each embodiment. FIG. 10 is a schematic longitudinal sectional view schematically showing a schematic configuration of an electro-optical device according to a seventh embodiment. The schematic perspective view which shows the external appearance of an electronic device. The schematic block diagram which shows the display control system of an electronic device.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[First embodiment]
1 is a schematic exploded perspective view schematically showing a configuration of an electro-optical device according to a first embodiment of the present invention, FIG. 2 is a schematic plan view showing a planar configuration of an adhesive surface, and FIG. 5 is a schematic longitudinal section of the electro-optical device. FIG.

  The electro-optical device 100 according to the present embodiment includes an electro-optical panel 10 and an input panel 20 that is disposed so as to overlap the electro-optical panel 10 in a planar manner. The electro-optical panel 10 and the input panel 20 are transparently bonded. It is bonded with the agent 30.

  As shown in FIG. 5, the electro-optical panel 10 is formed by bonding transparent substrates 11 and 12 made of, for example, glass or synthetic resin with a sealing material 13, and disposing a liquid crystal 14 between these substrates. Are provided with a plurality of pixels that can be controlled by electrodes (not shown). Further, polarizing plates 16 and 17 are arranged on the outer surface side of the substrates 11 and 12 as necessary. In addition, since the polarizing plates 16 and 17 are arbitrary components, in the following description, the surface of the electro-optical panel 10 is omitted and the polarizing plates 16 and 17 are omitted, and the surface of the transparent substrates 11 and 12 is configured. However, even in this case, when the polarizing plates 16 and 17 exist, the surface is the surface of the polarizing plate.

  As shown in FIG. 1, the electro-optical panel 10 is provided with an effective display area A that is a planar area in which the pixels are arranged within a range where the liquid crystal 14 is arranged. Here, each pixel in the effective display area A is driven by a drive signal output from the drive circuit 15 made of a semiconductor IC chip or the like, and is controlled so as to be in a predetermined transmission state for each pixel.

  In the electro-optic panel 10, the transparent substrate 11 has a substrate overhanging portion 11 </ b> T that protrudes outward from the edge of the transparent substrate 12, and is pulled out from the effective display area A on the substrate overhanging portion 11 </ b> T. The driving side wiring 18a and the input side wiring 18b extending to the edge of the substrate overhanging portion 11t are formed, and the driving circuit 15 electrically connected to both the wirings 18a and 18b is mounted. A wiring member 19 made of a flexible wiring board or the like that is conductively connected to the input side wiring 18b is mounted on the edge of the board overhanging portion 11T. The wiring member 19 is provided with an input terminal 19a, and this input terminal 19a is connected to a control circuit of an electronic device described later.

  In the illustrated example, the input panel 20 is a transparent touch panel. Although various structures are conceivable as the structure of the input panel 20, any system such as a resistive film system, a capacitance system, a surface acoustic wave system, an infrared system, an electromagnetic induction system, a microswitch system, or the like may be used. Although the structure of the input panel 20 differs depending on the above-described method, in the illustrated example, as shown in FIG. It will be pasted together. As shown in FIG. 1, an input region B provided with a transparent conductive film or a plurality of electrodes (none of which are shown) is generally provided inside the sealing material 26, although it differs depending on the type. It is done. A plurality of wirings 23 and 24 are drawn out from the input area B, and these wirings 23 and 24 are conductively connected to a wiring member 25 such as a flexible wiring board mounted on the end of the transparent substrate 22. The wiring member 25 is mounted on the transparent substrate 22 at a side (the left side in the drawing) where the outer edge of the transparent substrate 21 is disposed inside the outer edge of the transparent substrate 22.

  As shown in FIG. 2, the input area B is provided so as to completely include at least the effective display area A. That is, the input area B includes a range that overlaps all of the effective display area A, and a range that extends to the outside of the range as necessary. However, in the present invention, the input area B may be arranged so as to overlap with the effective display area A in a plan view. For example, the input area B may have a portion that does not overlap with the effective display area A. A portion that does not overlap the input region B may exist in the region A.

  The electro-optical panel 10 is a liquid crystal display panel in the illustrated example, but is not limited to a liquid crystal display panel, and may be an organic EL display panel, a plasma display panel, an electrophoresis panel, or the like.

  In the present embodiment, the electro-optical panel 10 and the input panel 20 are bonded by the transparent adhesive 30. The transparent adhesive 30 is obtained by curing a liquid adhesive, and various types such as an epoxy adhesive, an acrylic adhesive, a silicone adhesive, a urethane adhesive, etc., as long as it is transparent after curing. An adhesive can be used. The transparent adhesive 30 is disposed so as to fill at least the entire effective display area A, and the electro-optical panel 10 and the input panel 20 are bonded to each other in the effective display area A. Although the thickness of the transparent adhesive 30 is not specifically limited, It is preferable to exist in the range of 1-100 micrometers, and it is more preferable to exist in the range of 10-60 micrometers. If it is this range, it will become possible to obtain sufficient adhesive force, reducing an optical influence.

  A peripheral wall 31 is disposed between the electro-optical panel 10 and the input panel 20 together with the transparent adhesive 30. The peripheral wall 31 extends along the outer edge of the effective display area A and is configured as a frame as a whole. The peripheral wall 31 has an opening 31a in a part of the frame shape. In the illustrated example, the opening 31a is provided as a part in which the peripheral wall 31 is completely missing, but a part of the peripheral wall 31 is configured to be lower than the other part, and as a result, the concave part is formed as the opening. It is good also as 31a. Further, the peripheral wall 31 may be arranged inside the effective display area A or outside the effective display area A, but in the illustrated example, the peripheral wall 31 is arranged outside the effective display area A. ing. The thickness of the peripheral wall 31 is preferably within a range suitable as the thickness of the transparent adhesive 30. In this case, the peripheral wall 31 can be used as a spacer for determining the thickness of the transparent adhesive 30 and making it uniform.

  In the illustrated example, both the electro-optical panel 10 and the input panel 20 have a rectangular planar shape, and correspondingly, the effective display area A and the input area B are also rectangular. As shown in FIG. 2, the peripheral wall 31 is formed in a rectangular frame shape along the outer edge of the rectangular effective display area A. In the illustrated example, the peripheral wall 31 is disposed outside the effective display area A and the input area B. The openings 31a are respectively provided at the four corners of the rectangular frame shape. That is, the peripheral wall 31 is configured by four strip-shaped portions 31t that extend along the four sides of the rectangular shape and are arranged in a manner to provide the openings 31a apart from each other.

  The transparent adhesive 30 fills the inner region of the peripheral wall 31 and is exposed to the outer peripheral side through the opening 31a. Although the arrangement | positioning aspect of the transparent adhesive 30 in the opening part 31a is arbitrary, in the example of illustration, it is set as the state which the transparent adhesive 30 protruded slightly in the opening part 31a. The opening 31a serves to release air when the liquid adhesive forming the transparent adhesive 30 (adhesive L, which will be described later) is spread evenly over the entire effective display area A, and the liquid adhesive. This is to secure a quantitative margin of the liquid adhesive while preventing the liquid adhesive from protruding over the peripheral wall 31 by allowing the agent to protrude to the outside.

  In the present embodiment, the outer peripheral portion along the side where the liquid adhesive is most likely to protrude normally is blocked by the band-shaped portion 31t of the peripheral wall 31, and the opening 31a is provided at the corner portion so that air can escape from here. The adhesive can be smoothly spread to the inside of the corner. Further, even if the adhesive protrudes greatly from the opening 31a, the distance from the opening 31a to the corners of the electro-optical panel 10 and the input substrate 20 can be ensured larger than the outer peripheral portion along the side. As a result, it is easy to prevent the adhesive from protruding from between the transparent substrate 12 of the electro-optical panel 10 and the transparent substrate 21 of the input substrate 20.

  In other words, this means the following. That is, the transparent adhesive 30 of the present embodiment is formed by arranging an appropriate amount of a liquid adhesive, spreading it between the adhesive surfaces, and then curing it. At this time, it is necessary to adjust the amount of the liquid adhesive in advance so that the transparent adhesive 30 does not run out and is not excessive so as to protrude to the periphery. In this case, the presence of the peripheral wall 31 as described above makes it possible to ensure a sufficient margin for the amount of liquid adhesive.

  In the present embodiment, since the transparent adhesive 30 obtained by curing the liquid adhesive is uniformly disposed in the effective display area A or the input area B, the optical influence of the adhesive layer can be extremely reduced. it can. Further, since the peripheral wall 31 having the opening 31a is formed, it is possible to easily avoid the liquid adhesive sticking out and the generation of bubbles in the effective display area A or the input area B. The workability at the time of bonding the electro-optical panel 10 and the input panel 20 through the agent can be greatly improved.

  In the present embodiment, the structure for bonding the electro-optical panel 10 and the input panel 20 has been described. However, the present invention is not limited to this, and the electro-optical panel and other light-transmitting substrates (for example, optical A substrate, a cover substrate, a viewing angle control plate, a parallax barrier plate for three-dimensional display, and the like can also be used. This also applies to the embodiments described below.

[Second Embodiment]
Next, an electro-optical device 100 ′ according to a second embodiment of the present invention will be described with reference to FIG. In the present embodiment, the description of the same parts as those in the first embodiment is omitted, and the same parts are denoted by the same reference numerals.

  As shown in FIG. 3, the present embodiment is different from the first embodiment in that the transparent substrate 21 is configured to be slightly smaller than the transparent substrate 22 in the input panel 20. According to such a configuration, the wirings 23 and 24 drawn out from the input area B to the outside are extended out on the transparent substrate 22 from the transparent substrate 21. Accordingly, the wirings 23 and 24 are exposed to the electro-optical panel 10 side except for the region covered with the wiring member 25 on the transparent substrate 22, and the exposed wiring region is covered with the peripheral wall 31 ′. Yes.

Since the peripheral wall 31 ′ is formed of an insulating material, the wirings 23 and 24 are in an insulating coating state. In the present embodiment, the shape of the portion of the peripheral wall 31 (band-shaped portion along the two sides) 31t ′ formed in the region where the wirings 23 and 24 are exposed is the other portion (band-shaped along the remaining two sides). (Part) The shape is different from that of 31t, so that all the exposed wiring regions of the wirings 23 and 24 are covered. The wirings 23 and 24 may be covered with the transparent adhesive 30, but the covering area of the transparent adhesive 30 may vary to some extent, whereas the surrounding wall formed in a predetermined plane pattern By covering the wirings 23 and 24 with 31 ', insulation coating can be more reliably performed. By performing such an insulating coating, the input panel 20 can be hardly affected by external static electricity or the like, and can have a good electrical reliability.
In this embodiment, the transparent substrate 21 and the transparent substrate 22 having different external dimensions are bonded to each other so that the wirings 23 and 24 are exposed. However, the transparent substrate is configured by only one sheet. In this input panel, even if the wiring is exposed, this embodiment can be applied.

[Method of manufacturing electro-optical device]
Next, a method for manufacturing the electro-optical device according to the first embodiment will be described with reference to FIG. This manufacturing method is not limited to the first embodiment, but can also be applied to the manufacturing method of the second embodiment, and can be similarly applied to other embodiments described later. In FIG. 4, only the portion where the two transparent substrates 12 and 21 are bonded is illustrated, but in actuality, this is a process of bonding the electro-optical panel 10 and the input panel 20. As described above, the same applies to the case where various light-transmitting substrates are bonded to the electro-optical panel.

  In this manufacturing method, first, when the electro-optical panel 10 and the input panel 20 are bonded together, the surface 10X which is the surface of the electro-optical panel 10 (the surface of the transparent substrate 12) and the input facing the surface 10X. A peripheral wall 31 is formed on one of the other 20X, which is the surface of the panel 20 (the surface of the transparent substrate 21) (peripheral wall forming step). FIG. 4 shows an example in which the peripheral wall 31 is formed on the surface 20X.

  In this manufacturing method, first, as shown in FIG. 4A, a mask M is arranged on one surface 20X (mask arrangement stage). The mask M has the same thickness as that of the transparent adhesive 30 and the surrounding wall 31 and has an opening pattern Ma. The material of the mask M is not particularly limited, but when it is used repeatedly, it is preferable to have resistance to a liquid adhesive, which will be described later, and it is more preferable that the transparent adhesive easily peels off. Furthermore, in this embodiment, it is preferable that the mask M is a light shielding material such as a metal sheet or a black sheet.

  Next, as shown in FIG. 4B, in a state where the mask M is disposed on the surface 20X, an uncured resin N is disposed on the mask M, and the resin N is placed on the surface using a squeegee (not shown). Embed in the opening pattern Ma (material placement stage). Here, it is preferable that the resin N is not left as much as possible on the upper surface of the mask M, but some resin N may remain as shown in the figure. Although not particularly limited in the present invention, in the illustrated example, the uncured resin N is a photocurable resin (ultraviolet curable resin). The uncured resin N may be liquid, but it is preferably semi-solid (paste) in order to improve the embedding property in the opening pattern Ma.

  Thereafter, light is irradiated from the input panel 20 side (transparent substrate 21 side) to cure the resin N arranged in the opening pattern Ma (material curing stage). When the resin N is not a photocurable resin, for example, in the case of a thermosetting resin or a thermoplastic resin, the resin N may be cured by heating or drying. In the illustrated example, since light is irradiated from the input panel 20 side (transparent substrate 21 side), the resin N remaining on the surface of the mask M is not cured because the light is not irradiated due to the light shielding property of the mask M. .

  Thereafter, when the resin N disposed in the opening pattern Ma is sufficiently cured, the mask M is removed as shown in FIG. 4C (mask removal step). At this time, since some of the resin N remaining on the surface of the mask M is not cured as described above, when the mask M is removed, the resin N in the opening pattern Ma peels from the surface 20X. Or burrs can be prevented from remaining at the upper corners of the resin N in the opening pattern Ma.

  The resin N disposed and cured in the opening pattern Ma as described above is used as the peripheral wall 31. The shape of the peripheral wall 31 is the same as that of the first or second embodiment and other embodiments described later. In this case, the optical influence by the surrounding wall 31 can be reduced irrespective of the formation position of the surrounding wall 31 because the surrounding wall 31 is comprised with a transparent material. Moreover, as said uncured resin N, the same thing as the liquid adhesive L mentioned later can also be used. Here, it is possible to improve the adhesion on the surface 20X by configuring the peripheral wall 31 with an adhesive. In addition to the method of embedding the uncured resin N in the opening pattern Ma of the mask M, the method of forming the peripheral wall 31 is to apply the resin N by screen printing or apply it with a dispenser. Or a method of attaching a sheet-like or tape-like member to be described later.

  When the peripheral wall 31 is formed on the surface 20X as described above, next, as shown in FIG. 4D, the liquid is formed on the surface 20X or the surface 10X in a plane region corresponding to the inside of the peripheral wall 31. The adhesive L is disposed (adhesive placement step). Here, the adhesive L may be disposed on the surface 10X as long as it is in a region corresponding to the inside of the peripheral wall 31, but is preferably disposed on the surface 20X on which the peripheral wall 31 is formed. Moreover, it is preferable that the adhesive L is disposed by a preset amount using a dispenser or the like (not shown). Accordingly, it is possible to prevent the adhesive L from being insufficient and air bubbles from being generated in the adhesion range, or the adhesive L from becoming excessive and the adhesive L from protruding from the adhesion range to the surroundings. Furthermore, the adhesive L is preferably arranged in a plurality of locations in the plane area as indicated by the dotted line in the figure. For example, when the planar area is rectangular as shown in the first embodiment, the droplets of the adhesive L are disposed at positions shifted from the center of the area toward the four corners. Thus, the adhesive L can be smoothly spread in the corner direction in the following substrate bonding step. In this application, the term “liquid” is used to include a state having fluidity such as a paste in addition to the liquid, and the liquid adhesive is a material that flows between the bonding surfaces by flowing in the substrate bonding process. Anything can be used.

  Thereafter, the electro-optical panel 10 and the input panel 20 are bonded together with the surfaces 10X and 20X facing each other. At this time, the liquid adhesive L is pushed and spread between the surfaces 10X and 20X by applying a flat pressure evenly to the electro-optical panel 10 and the input panel 20, and the entire inside of the peripheral wall 31 is spread. (Board bonding process). Further, although some of the adhesive L protrudes from the opening 31a depending on the amount of the adhesive L, the protrusion of the adhesive L is previously prevented so that the protrusion does not protrude further from the outer edges of the surfaces 10X and 20X. The amount is determined. Here, in the substrate bonding step, when the surfaces 10X and 20X are pressure-bonded, the peripheral wall 31 functions as a spacer and the thickness of the adhesive L is regulated.

  Next, the adhesive L is cured in a state where the adhesive L is spread as described above (adhesive curing step). Here, the above-described adhesive L in the illustrated example is a photo-curable adhesive, but the present invention is not limited to the photo-curable adhesive as described above, and a thermosetting adhesive or a volatile solvent. Various adhesives such as an adhesive using pressure and a pressure sensitive adhesive can be used. In this step, a curing process corresponding to the type of the adhesive L is performed, but when the adhesive L is a photocurable adhesive, light is irradiated from the input panel 20 side (transparent substrate 21 side). When the adhesive L is cured as described above, the electro-optical panel 10 and the input panel 20 (surfaces 10X and 20X) are bonded and fixed by the transparent adhesive 30.

[Third Embodiment]
Next, an electro-optical device 100 ″ according to a third embodiment of the present invention will be described with reference to FIG. 6. In this embodiment, the description of the same parts as those of the first embodiment will be omitted, and the same parts will be omitted. Are given the same reference numerals.

  This embodiment is the same as the previous embodiments in that the peripheral wall 31 ″ extends along the outer edge of the effective display area A and is formed in a frame shape so as to surround the effective display area A. However, the peripheral wall 31 ″ of the present embodiment is different in that the opening 31a ″ is not a corner portion but provided in the middle of each side. In the illustrated example, a plurality of openings 31a ″ extend along each side. Each of the peripheral walls 31 ″ is provided with a belt-like portion 31t separated by an opening 31a ″ and a refractive portion 31t ″ configured in an L shape. Thus, even when the opening 31a ″ is provided at a place other than the corner, the basic effect of the opening can be obtained, so that the liquid adhesive L is held inside the peripheral wall 31 ″ while the liquid adhesive L is held. It can be spread smoothly on the inside.

  In addition, the said structure of this embodiment is applicable similarly in said 2nd Embodiment and other embodiment mentioned later. In addition, each structure of each embodiment in this specification can be implemented in combination with each other appropriately as long as a part or all of them are not mutually contradictory.

[Fourth Embodiment]
Next, an electro-optical device 200 according to a fourth embodiment of the invention will be described with reference to FIG. In the present embodiment, the description of the same parts as those in the first embodiment is omitted, and the same parts are denoted by the same reference numerals.

  In the present embodiment, the electro-optical panel 10 and the input panel 20 are bonded by the transparent adhesive 30 as in the previous embodiments, and a frame-shaped peripheral wall 31 is disposed on the outer peripheral portion thereof. However, in each of the previous embodiments, the peripheral wall 31 is in contact with the surface (10X) of the electro-optical panel 10 and the surface (20X) of the input panel 20, whereas in the present embodiment, the peripheral wall 31 is One of the above surfaces is in contact with the other, but not the other, and one of the transparent adhesive 30 is provided between the peripheral wall 31 and the other surface (the surface 20X of the input device 20 in the illustrated example). The part 30p is interposed.

  As in the present embodiment, the peripheral wall 31 is not for completely preventing the liquid adhesive L from moving outward, but merely prevents the adhesive L from protruding greatly outward. Therefore, the adhesive L may enter between the peripheral wall 31 and one of the adhesive surfaces, and the adhesive L may get over the peripheral wall 31 and protrude slightly to the outer peripheral side. In the illustrated example, the adhesive L partially protrudes beyond the peripheral wall 31 and is cured in that state, so that the transparent adhesive 30 has a portion 30 s disposed on the outer surface of the peripheral wall 31, and A portion 30t arranged on one surface (10X) is provided on the outer side of the portion 30s.

  In the present embodiment, it is preferable that the surface tension of the liquid adhesive L with respect to the peripheral wall 31 is low. This configuration is determined by the material and mode of the surface of the adhesive L and the surrounding wall 31. In general, when the surface material of the peripheral wall 31 is made of a silicone resin or a fluorine resin, the surface tension can be reduced, and the wettability of the liquid adhesive L to the peripheral wall 31 can be improved. Thereby, since the adhesive L is easily held on the surface of the peripheral wall 31, even when the adhesive L gets over the peripheral wall 31, the amount of the adhesive protruding to the outside can be suppressed.

  In this case, the entire peripheral wall 31 may be made of a silicone resin or a fluorine resin, or the surface of another material may be coated with a silicone resin or a fluorine resin. As another method, a configuration in which the surface of the peripheral wall 31 is covered with a surface conditioner that reduces the surface tension is also conceivable. In this case, the surface conditioner may be any as long as it reduces the wettability of the surrounding wall 31 itself. For example, acrylic surface conditioners, vinyl surface conditioners, silicones are generally used as surface conditioners. Either a system surface conditioner or a fluorine-based surface conditioner can be used.

  In addition, the structure of said transparent adhesive 30 of this embodiment can be similarly employ | adopted not only in 1st Embodiment thru | or 3rd Embodiment but in other embodiment mentioned later. However, in these cases, the function as a spacer played by the peripheral wall is relatively weak. The configuration relating to the surface tension of the adhesive L with respect to the peripheral wall 31 can also be applied to all other embodiments. This configuration brings about an effect that the spread of the adhesive L to the outside of the opening 31a can be suppressed by increasing the wettability of the adhesive L around the opening 31a, for example.

[Fifth Embodiment]
Next, an electro-optical device 200 ′ according to a fifth embodiment of the invention will be described with reference to FIG. In the present embodiment, the description of the same parts as those in the first embodiment is omitted, and the same parts are denoted by the same reference numerals.

  In the present embodiment, the peripheral wall 32 extends along the outer edge of the effective display area A and is configured in a frame shape, and is similar to each of the previous embodiments in that it has an opening 32a in part. is there. However, the inner wall 32 is configured to be uneven in the direction along the outer edge of the effective display area A. In the illustrated example, a plurality of projecting portions 32 b projecting inward are provided on the inner surface of the peripheral wall 32. The plurality of protrusions 32 b are periodically formed along the outer edge of the effective display area A.

  By configuring the inner surface of the peripheral wall 32 to be uneven as described above, when the liquid adhesive L is spread between the electro-optical panel 10 and the input panel 20 (transparent substrate 21), in the vicinity of the peripheral wall 32. Since the flow of the adhesive L along the extending direction is suppressed, the amount of movement of the adhesive L from the extending direction of the peripheral wall 32 toward the opening 32a is reduced, and as a result, the opening 32a. Thus, the adhesive L is prevented from flowing out vigorously. Therefore, the adhesive L is prevented from protruding significantly from the opening 32a, and as a result, the adhesive L is also prevented from protruding from the outer edge of the panel.

  Since a predetermined amount of the above-mentioned adhesive L is basically arranged in advance according to the area and thickness of the bonding region, the amount of the adhesive L is absolutely too large in the substrate bonding step, so that it protrudes to the surroundings. However, when the position where the adhesive L is arranged before the substrate bonding step is close to the specific opening 32a, the opening closest to the adhesive L when it is spread out It is conceivable that the adhesive L flows intensively toward 32a, and as a result, the adhesive L protrudes greatly from the opening 32a. In the present embodiment, the above-described situation is prevented by suppressing the flow of the adhesive L in the direction along the peripheral wall 32 in the outer peripheral portion near the peripheral wall 32 by the uneven shape.

The uneven shape does not need to be formed over the entire inside of the peripheral wall 32, and can be provided partially. For example, unlike the illustrated example, it is possible to prevent the adhesive L from flowing out of the opening 32a vigorously by providing one or a plurality of protrusions only on the inner portions on both sides of the opening 32a.
Further, in the configuration in which the wiring is exposed as in the second embodiment, if the convex portion and the wiring are arranged so as to overlap, the input panel 20 is hardly affected by external static electricity and the like, and the electrical reliability is good. It can be in a state.

[Sixth Embodiment]
Next, an electro-optical device 200 ″ according to a sixth embodiment of the present invention will be described with reference to FIG. 9. In the present embodiment, the description of the same parts as those of the first embodiment will be omitted, and the same parts will be omitted. Are given the same reference numerals.

  In the present embodiment, the peripheral wall 32 'is basically the same main wall 32A as in the first to third embodiments, and an island-shaped separation wall arranged separately in the vicinity of the inside of the main wall 32A. 32B. A plurality of separation walls 32B are arranged along the extending direction of the main wall 32A. In the illustrated example, the plurality of separation walls 32B are periodically arranged in a direction parallel to the main wall 32A at regular intervals.

  The plurality of separation walls 32B of the present embodiment have the effect of suppressing the flow of the adhesive L in the extending direction of the main wall 32A in the vicinity of the inner side of the main wall 32A, as in the fifth embodiment. Even in this case, the position of the separation wall 32B is not particularly limited as in the fifth embodiment, and the separation wall 32B can be disposed in any position as long as it is in the vicinity of the main wall 32A, and is uniformly distributed along the main wall 32A. It is not limited to the case where it arrange | positions, You may arrange | position only to one part. For example, in order to prevent the adhesive L from flowing directly from the inside to the outside of the opening 32a, one or more separation walls 32B may be arranged only in the vicinity of the opening 32a. Further, in the configuration in which the wiring is exposed as in the second embodiment, if the separation wall 32B and the wiring are arranged so as to overlap, the input panel 20 is hardly affected by external static electricity and the like, and the electrical reliability is improved. It can be in a good state.

[Method of forming the surrounding wall]
Next, another example of the method for forming a peripheral wall according to the present invention will be described with reference to FIG. In this example, as shown to Fig.10 (a), the sheet-like (tape-like) film material S is stuck on the surface of the transparent substrate 21 which should form a surrounding wall. At this time, the film material S is preferably made of an adhesive material, but for example, the film material S may be provided with a separate adhesive layer on the surface. The film material S is affixed to a base material U such as release paper, and the film material S is formed in advance in a planar shape of the peripheral wall, or in accordance with the shape of the peripheral wall in advance as illustrated. To be disconnected.

  And after the film material S is affixed on the surface of the transparent substrate 21, the base material U is peeled off, so that the film material S having a predetermined planar shape remains on the surface of the transparent substrate 21, and this is the periphery. It becomes a wall 32 ″.

  As in the above example, the peripheral wall shown in each of the above-described embodiments can be formed by sticking a sheet-like or tape-like solid film material. If it does in this way, although shaping | molding of film material is needed previously, once film material can be prepared, the subsequent process can be performed very simply and easily.

[Seventh Embodiment]
Next, an electro-optical device 300 according to a seventh embodiment of the invention will be described with reference to FIG. In the present embodiment, the description of the same parts as those in the first embodiment is omitted, and the same parts are denoted by the same reference numerals.

  In the present embodiment, an electro-optical panel 10 similar to the above, an input panel 20 similar to the above, and a transparent cover plate 1 made of glass, hard resin, or the like disposed on the surface of the input panel 20 are provided. The cover plate 1 is fixed to or in contact with the opening edge of the display window 2a of the housing 2. The cover plate 1 is bonded to the input panel 20 via a transparent adhesive 40. The electro-optical panel 10 and the input panel 20 are preferably bonded with a transparent adhesive 30 similar to that described above, and a peripheral wall 31 similar to the above is preferably provided, although not shown.

  A peripheral wall (not shown) is formed in the same manner as described above on the structural portion bonded with the transparent adhesive 40 between the input panel 20 and the cover plate 1. In such a structure, the electro-optical panel 10 has the input panel 20 interposed, but is indirectly bonded to the cover plate 1 by the transparent adhesive 40, and the bonding structure includes a peripheral wall (not shown). Therefore, when the cover plate 1 is a translucent substrate, it is included in the configuration of the present invention.

  In the present embodiment, an illumination unit 60 is disposed behind the electro-optical panel 10, and the illumination unit 60 includes a light source 61 such as an LED, a light guide plate 62 that emits light while propagating light emitted from the light source 61, and A reflection plate 63 disposed behind the light guide plate 62 and an optical sheet 64 disposed on the light output surface of the light guide plate 62 are provided.

[Electronics]
Finally, an embodiment of an electronic apparatus including the electro-optical device 100 will be described with reference to FIGS. The electronic apparatus 400 includes the electro-optical device 100 including the electro-optical panel 10, the transparent adhesive 30, and the peripheral wall 31. FIG. 12 illustrates a mobile phone as an example of the electronic apparatus 400. ing.

  The electronic apparatus 400 includes an operation unit 401 having a plurality of operation buttons, a mouthpiece, and the like, and a display unit 402 having an earpiece, and the electro-optical device 100 is incorporated in the display unit 402. Become. The effective display area A (see FIG. 1) of the electro-optical panel 10 of the electro-optical device 100 can be viewed on the surface (inner surface) of the display unit 402. In this case, a display control circuit to be described later for controlling the electro-optical device 100 is provided inside the electronic apparatus 200. The display control circuit sends a predetermined control signal to the drive circuit 15 that drives the electro-optical panel 10 to determine the display mode of the electro-optical device 100.

  FIG. 13 is a schematic configuration diagram illustrating an overall configuration of a control system (display control system) for the electro-optical device 100 mounted on the electronic apparatus 400. The electronic apparatus 400 shown here includes a display information output source 291, a display information processing circuit 292, a power supply circuit 293, a timing generator 294, and a light source control circuit 295 that supplies power to the illumination unit 60. A circuit 290 is included. In addition, the electro-optical device 100 includes the electro-optical panel 10 having the above-described configuration, a drive circuit 15 that drives the panel 10, and an illumination unit 60 that illuminates the panel 10.

  The display information output source 291 includes a memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory), a storage unit such as a magnetic recording disk or an optical recording disk, and a tuning circuit that tunes and outputs a digital image signal. The display information is supplied to the display information processing circuit 292 in the form of an image signal or the like of a predetermined format based on various clock signals generated by the timing generator 294.

  The display information processing circuit 292 includes various known circuits such as a serial-parallel conversion circuit, an amplification / inversion circuit, a rotation circuit, a gamma correction circuit, and a clamp circuit, and executes processing of input display information to obtain image information. Are supplied to the drive circuit 15 together with the clock signal CLK. The drive circuit 15 includes a scanning line drive circuit, a signal line drive circuit, and an inspection circuit. The power supply circuit 293 supplies a predetermined voltage to each of the above-described components.

  The light source control circuit 295 supplies power to the light source of the illumination unit 60 based on the voltage supplied from the power supply circuit 293, and controls whether or not the light source is turned on and its brightness based on a predetermined control signal. ing.

  In addition to the mobile phone shown in FIG. 12, examples of the electronic apparatus according to the present invention include a liquid crystal television, a car navigation device, an electronic notebook, a calculator, a workstation, a videophone, and a POS terminal. The electro-optical device according to the present invention can be used as a display unit of these various electronic devices. However, since the electro-optical device 100 can be easily manufactured, the present invention is particularly effective when used in small portable electronic devices such as a mobile phone, an electronic timepiece, and a portable information terminal.

  Note that the illumination device and the electro-optical device of the present invention are not limited to the illustrated examples described above, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Electro-optical panel, 11, 12 ... Transparent substrate, 13 ... Sealing material, 14 ... Liquid crystal, 15 ... Drive circuit, 16, 17 ... Polarizing plate, 18a ... Drive side wiring, 18b ... Input side wiring, 19 ... Wiring member 20 ... input panel 21,22 ... transparent substrate, 23,24 ... wiring, 25 ... wiring member, 30 ... transparent adhesive, 31,32 ... peripheral wall, 31a, 32a ... opening, 32b ... projection, 32A ... Main wall, 32B ... Separation wall, L ... Liquid adhesive, A ... Effective display area, B ... Input area

Claims (10)

An electro-optic panel with an effective display area;
A translucent substrate disposed in a planar manner on the effective display area of the electro-optic panel; and disposed opposite to the electro-optic panel with respect to the translucent substrate and smaller than the translucent substrate. A transparent counter substrate configured, a transparent conductive film disposed between the translucent substrate and the counter substrate, and the transparent substrate electrically connected to the transparent conductive film, wherein the translucent substrate is the counter substrate An input panel having wiring arranged in a region extending from the end of
A transparent adhesive that is disposed between the electro-optical panel and the input panel at least in the effective display area, and directly or indirectly bonds the electro-optical panel and the input panel ;
The transparent adhesive is disposed between the electro-optical panel and the input panel , extends along the outer edge of the effective display area, is formed in a frame shape as a whole, and partially includes an opening. A surrounding wall ,
The surrounding wall is formed of an insulating transparent material and covers the wiring.
Electro-optic device. The electro-optical panel and the input panel are configured in a rectangular shape, the peripheral wall is configured in a rectangular frame shape, and has the opening at a corner of the rectangular frame shape,
The electro-optical device according to claim 1. At least the surface of the peripheral wall is made of a silicone resin or a fluorine resin,
The electro-optical device according to claim 1. The inner surface of the peripheral wall is configured to be uneven along the outer edge of the effective display area,
The electro-optical device according to claim 1. A plurality of island-shaped separation walls are arranged along the outer edge of the effective display area on the inner side of the peripheral wall.
The electro-optical device according to claim 1. An electro-optical panel having an effective display area; and an input panel that is arranged to overlap the effective display area of the electro-optical panel in a plane and is directly or indirectly bonded via a transparent adhesive. In the method of manufacturing the electro-optical device,
The input panel is disposed so as to overlap the effective display area of the electro-optical panel in a planar manner, and is disposed to face the electro-optical panel with respect to the translucent substrate. A transparent counter substrate configured to be smaller than the transparent substrate, a transparent conductive film disposed between the light transmissive substrate and the counter substrate, and the light transmissive electrically connected to the transparent conductive film A substrate is disposed in a region protruding from an end of the counter substrate, and
On the surface of either one of the electro-optic panel and the input panel, the periphery extends along the outer edge of the effective display area and is formed in a frame shape as a whole and partially includes an opening. A surrounding wall forming process for forming a wall;
An adhesive placement step of placing a liquid adhesive in a region corresponding to the inside of the peripheral wall on the surface of at least one of the electro-optic panel and the input panel;
A substrate laminating step for laminating the electro-optical panel and the input panel via the liquid adhesive;
An adhesive curing step for curing the liquid adhesive to form the transparent adhesive,
The wiring is covered by the surrounding wall;
Manufacturing method of electro-optical device. The surrounding wall forming step includes
Placing a mask with an opening pattern on the surface;
Embedding uncured wall material in the opening pattern;
Curing the uncured wall material;
Removing the mask;
The method for manufacturing an electro-optical device according to claim 6, wherein: The mask is a light-shielding mask, the wall material is a photocurable resin, and the wall material is cured by irradiating light from the input panel side at the stage of curing the uncured wall material.
A method for manufacturing the electro-optical device according to claim 7. The wall material is the same material as the liquid adhesive,
The method for manufacturing an electro-optical device according to claim 7 .
An electronic apparatus comprising the electro-optical device according to claim 1 and a control unit for the electro-optical device.

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