JP5315965B2 - Protective plate integrated display panel and manufacturing method thereof - Google Patents

Description

  The present invention relates to a protective plate integrated display panel and a method for manufacturing the same.

  As a protective plate-integrated display panel, a display element for displaying an image and an observation surface protective plate arranged on the observation side of the display element are filled in a gap between them and polymerized after filling. There is a protective panel integrated display panel.

This protective plate integrated display panel is provided with a spacer on the observation side surface of the display element so as to surround the screen area of the display element, and in the region surrounded by the spacer on the observation side surface of the display element. By supplying unpolymerized resin, placing an observation surface protection plate on the observation side of the display element, and pressing the protection plate against the supplied unpolymerized resin layer, the display element and the protection plate It is manufactured by a method in which the protective plate is brought into contact with the spacer in a state in which the unpolymerized resin is filled in the space between the spacers, and then the resin layer is polymerized (Patent Document 1). reference).
JP-A-6-337411

  The protective plate-integrated display panel has an air gap between the protective plate and the unpolymerized resin layer when the observation surface protective plate is pressed against the unpolymerized resin layer supplied on the observation side surface of the display element. May be trapped, and bubbles may be formed in the polymerized resin layer thereafter to deteriorate the display quality.

  An object of the present invention is to provide a protective plate-integrated display panel in which a resin layer for joining a display element and an observation surface protection plate can be formed without generating bubbles and good display quality can be obtained. It is what.

  Another object of the present invention is to provide a manufacturing method of a protection plate integrated display panel capable of joining the display element and the observation surface protection plate without causing bubbles in the resin layer. Is.

In order to achieve the above-mentioned object, a protective plate integrated display panel according to the present invention includes a display element, a spacer attached to a first surface of the display element so as to surround a screen area of the display element, The spacer is disposed on the first surface side and is formed of a transparent plate formed in a shape covering the first surface, and the spacer is formed on a surface facing the first surface of the two plate surfaces of the transparent plate. corresponding to the four sides of the region surrounded by the mountain-like surface shape from each side inclined in a direction to protrude on the first surface side to the side corresponding to the central portion of the region is formed, wherein A surface opposite to the first surface is filled in the region surrounded by the spacer in the gap between the protective plate abutting the spacer and the display element and the protective plate, and is polymerized after filling. and a resin layer for bonding the protective plate and the display device It is characterized in.

In order to achieve the above-described object, a manufacturing method of a protective plate-integrated display panel according to the present invention includes a display element and a protective plate disposed on the first surface side of the display element in a gap between them. In the manufacturing method of a protective plate integrated display panel filled with a resin layer that is filled and polymerized after filling, a step of pasting a spacer around the screen area of the display element on the first surface; A step of supplying unpolymerized resin to a region surrounded by the spacer on one surface, and a protective plate made of a transparent plate formed on the first surface side so as to cover the first surface The protective plate is disposed on the supplied unpolymerized resin layer, and the portion closer to the side of the region is delayed from the portion corresponding to the central portion of the region surrounded by the spacer. To provide a time difference in contact with the unpolymerized resin layer. The step of bringing the protective plate into contact with the spacer in a state where the unpolymerized resin is filled in the region surrounded by the spacer in the gap between the display element and the protective plate; And a step of polymerizing the unpolymerized resin, wherein the protective plate has at least a side corresponding to the two sides facing each other of the region surrounded by the spacer on a surface facing the first surface. From a transparent plate formed with a mountain-shaped surface inclined in a direction protruding toward the first surface toward the side corresponding to the central portion of the region, and the mountain-shaped surface of the protection plate is , And press against the unpolymerized resin layer .

  According to the protection plate integrated display panel of the present invention, a resin layer for joining the display element and the observation surface protection plate can be formed without generating bubbles, and good display quality can be obtained.

  Moreover, according to the manufacturing method of the protection plate integrated display panel of the present invention, the display element and the observation surface protection plate can be joined without causing bubbles in the resin layer.

(First embodiment)
1 to 5 show a first embodiment of the present invention. FIG. 1 is a plan view of a display panel integrated type display panel, and FIGS. 2 and 3 are II-II and III-III lines in FIG. FIG.

  This protective plate-integrated display panel includes a display element 1 for displaying an image, a spacer 9 that is attached to an observation side surface of the display element 1 so as to surround a screen area 1a of the display element 1, and the display An observation surface protection plate 10 disposed on the observation side of the element 1 and having a surface facing the display element 1 in contact with the spacer 9, and the spacer in the gap between the display element 1 and the protection plate 10 9 and a transparent resin layer 16 that is filled and polymerized after filling.

  The display element 1 is, for example, a liquid crystal display element. The display element 1 is disposed opposite to each other with a predetermined gap therebetween, and is joined to the observation side and the opposite side thereof via a frame-shaped sealing material 4 surrounding the rectangular screen area 1a. A pair of transparent substrates 2 and 3, a liquid crystal layer 5 sealed in a region surrounded by the sealing material 4 in a gap between the substrates 2 and 3, and an outer surface of the pair of substrates 2 and 3, respectively. And a pair of polarizing plates 6 and 7 on the opposite side.

  The liquid crystal display element 1 is an active matrix liquid crystal display element in which, for example, a TFT (thin film transistor) is used as an active element. A plurality of transparent pixel electrodes arranged in a matrix in the row direction and the column direction, a plurality of TFTs arranged corresponding to these pixel electrodes and connected to the corresponding pixel electrodes, and each row A plurality of scanning lines for supplying gate signals to the TFTs of the TFTs and a plurality of signal lines for supplying data signals to the TFTs of each column are provided, and the plurality of scanning lines are provided on the inner surface of the other substrate, for example, the substrate 2 on the observation side. A single-film transparent counter electrode facing the pixel electrode array region is provided.

  The opposite substrate 3 is formed with a driver mounting portion 3a extending outward from the observation side substrate 2, and the plurality of scanning lines and signal lines are mounted on the driver mounting portion 3a. Connected to the display driver 8, the counter electrode is connected to the counter electrode via a cross connection portion (not shown) provided at a substrate bonding portion by the sealing material 4 and a counter electrode connection line (not shown) formed on the driver mounting portion 3 a. Connected to a potential source.

  Further, although not shown in the figure, the inner surface of the observation-side substrate 2 has red, green, blue corresponding to a plurality of pixels each having a region in which the plurality of pixel electrodes and the counter electrode face each other. These three color filters are provided, and the counter electrode is formed on the color filter. An alignment film is provided on the inner surfaces of the pair of substrates 2 and 3 so as to cover the electrodes, and the liquid crystal molecules of the liquid crystal layer 5 are interposed between the pair of substrates 2 and 3 by the alignment film. It is oriented in the defined orientation state.

  The liquid crystal display element 1 displays an image by controlling transmission of light emitted from a surface light source (not shown) disposed on the opposite side to the observation side by applying a voltage between the electrodes of the plurality of pixels. To do.

  The spacer 9 is made of a resin sheet having a predetermined thickness formed in a rectangular frame shape corresponding to the peripheral edge of the observation side surface of the liquid crystal display element 1 (the outer surface of the observation side polarizing plate 6). Surrounding the screen area 1 a of the liquid crystal display element 1, the liquid crystal display element 1 is affixed to a peripheral portion of an observation side surface (hereinafter referred to as an observation surface) with a double-sided adhesive tape (not shown).

  The observation surface protection plate 10 is a tempered glass plate or an acrylic resin formed in a shape that covers the observation surface of the liquid crystal display element 1, for example, a rectangular shape with a peripheral portion projecting around the liquid crystal display element 1. It is made of a transparent plate such as a plate, and corresponds to at least two sides of the rectangular region surrounded by the spacer 9 on the surface facing the liquid crystal display element 1 of the two plate surfaces. A mountain-like surface 11 is formed which is inclined from the side to be projected toward the liquid crystal display element 1 toward the side corresponding to the central portion of the region.

  FIG. 4 is a perspective view of the observation surface protection plate 10, and the mountain-like surface 11 of the protection plate 10 is a portion of the surface of the protection plate 10 that faces the liquid crystal display element 1 and abuts against the spacer 9. A portion of the surface facing the liquid crystal display element 1 that is formed in a rectangular region on the inner side and abutting on the spacer 9 and a portion on the outer side thereof are flush over the entire circumference of the protective plate 10. It is formed on a flat surface.

  Further, the mountain-shaped surface 11 of the protective plate 10 is directed toward the liquid crystal display element 1 from the side corresponding to the four sides of the region surrounded by the spacer 9 toward the side corresponding to the central portion of the region. It is formed in a shape inclined in the protruding direction.

  In this embodiment, the mountain-shaped surface 11 has a rectangular planar shape corresponding to the region surrounded by the spacer 9 as shown in FIG. 4, and the center between the two long sides of the rectangular portion. The portion has a linear top portion parallel to the long side and shorter than the long side, and the height of the top portion with respect to the flat surface of the peripheral edge of the protective plate 10 is larger than the thickness of the spacer 9. Further, the two inclined surfaces 12a and 12b from the two long sides toward the top are formed into trapezoidal surfaces inclined at substantially the same inclination angle, and the two short sides of the rectangular portion are set. The two inclined surfaces 12c and 12d heading from the top to the top are formed into triangular surfaces inclined at substantially the same inclination angle as the two long-side inclined surfaces 12a and 12b, respectively, and are inclined in four directions. Is formed.

  Further, a flat surface around the mountain-shaped surface 11 of the surface of the protective plate 10 facing the liquid crystal display element 1 is shielded from light so as to correspond to a region outside the screen area 1 a of the liquid crystal display element 1. A light-shielding film 15 made of a coating film of paint or a plating or vapor deposition film of a metal such as chromium is formed.

  The protective plate 10 has, on the observation side of the liquid crystal display element 1, a flat surface (light shielding film 15 surface) around the mountain-shaped surface 11 out of the surfaces facing the liquid crystal display element 1. The liquid crystal display element 1 is filled with a resin layer 16 that is filled in a region surrounded by the spacer 9 in the gap between the liquid crystal display element 1 and the protective plate 10 and polymerized after filling. It is joined to the observation surface.

  The resin layer 16 has a refractive index after polymerization in order to reduce light scattering at the interface between the resin layer 16 and the observation surface of the liquid crystal display element 1 and the interface with the protective plate 10. A member that forms the observation surface of the display element 1, that is, the refractive index of the observation-side polarizing plate 6 and the refractive index of the protective plate 10, or the refractive index of the observation-side polarizing plate 6 and the protective plate 10. Is formed of a low scattering resin.

Further, the resin layer 16 is a resin material having both ultraviolet-polymerizable and thermal-polymerizable characteristics, for example, an acrylic monomer such as acrylate and methacrylate, or a low polymer of one or both of acrylate and methacrylate. It is formed of a resin material obtained by adding a curing initiator made of an organic peroxide such as a sulfonium salt to an alicyclic epoxy resin such as an acrylic oligomer.

  This resin material has a viscosity in an unpolymerized state of 1500 to 10,000 mPa · s (millipascal second), preferably 3000 to 5000 mPa · s, and an E-code hardness after ultraviolet polymerization and thermal polymerization of E4 to E13, preferably It is desirable that E7 to E10 have a shrinkage ratio of 0.9 to 2.0%, preferably 0.97 to 1.64% due to ultraviolet polymerization and thermal polymerization.

  In this protection plate integrated display panel, a spacer 9 is attached on the observation surface of the liquid crystal display element 1 so as to surround the screen area 1 a of the liquid crystal display element 1, and the liquid crystal display is provided on the observation side of the liquid crystal display element 1. An observation surface protection plate 10, which is made of a transparent plate formed in a shape covering the observation surface of the element 1 and has the mountain-shaped surface 11 formed on the surface facing the liquid crystal display element 1, is disposed. The surface facing the liquid crystal display element 1 is brought into contact with the spacer 9, and the liquid crystal display element 1 and the protective plate 10 are filled in a region surrounded by the spacer 9 in the gap between them. Since the resin layer 16 that has been polymerized later is bonded, the resin layer 16 for bonding the liquid crystal display element 1 and the protective plate 10 is formed without generating bubbles, and good display quality is achieved. Can be obtained.

  FIG. 5 shows a manufacturing method of the protective plate integrated display panel. The protective plate integrated display panel surrounds the screen area 1 a of the liquid crystal display element 1 on the observation surface of the liquid crystal display element 1. The step of attaching the spacer 9, the step of supplying unpolymerized resin 16 a to the region surrounded by the spacer on the observation surface of the liquid crystal display element 1, and the liquid crystal on the observation side of the liquid crystal display element 1 The protective plate 10 having the mountain-shaped surface 11 formed on the surface facing the display element 1 is arranged, and the protective plate 10 is surrounded by the supplied unpolymerized resin 16a layer with the spacer 9. The liquid crystal display element 1 and the liquid crystal display element 1 are pressed by providing a time difference in which the portion other than the portion corresponding to the central portion of the region is closer to the side portion of the region and comes into contact with the layer of the unpolymerized resin 16a with a delay. Between the protective plate 10 The region surrounded by the spacer 9 is filled with the unpolymerized resin 16a and the protective plate 10 is brought into contact with the spacer 9 and the filled unpolymerized resin 16a is polymerized. To do.

  In this manufacturing method, the unpolymerized resin 16a is applied to the entire region surrounded by the spacer 9 on the observation surface of the liquid crystal display element 1 by means such as dropping by a dispenser, transfer, or screen printing. Supply a little thicker than the height.

  The protective plate 10 has a flat surface around the mountain-shaped surface 11 of the surface of the protective plate 10 facing the liquid crystal display element 1 on the observation side of the liquid crystal display element 1. It arrange | positions so that it may oppose, and this protective plate 10 is pressurized by the pressurization means which is not shown in figure from the outer surface (surface opposite to the surface which opposes the liquid crystal display element 1) side.

  As described above, when the protective plate 10 is arranged on the observation side of the liquid crystal display element 1 and is pressed from the outer surface side, the mountain-shaped surface 11 formed on the surface of the protective plate 10 facing the liquid crystal display element 1 is formed. The top portion first contacts the layer of the unpolymerized resin 16a, and the top portion of the mountain-shaped surface 11 crushes the layer of the unpolymerized resin 16a. Subsequently, the inclined surface 12a of the peripheral surface of the mountain-shaped surface 11 is formed. 12b, 12c, and 12d contact the layer of the unpolymerized resin 16a in order from the top side, and the layer of the unpolymerized resin 16a is formed on the top of the mountain-shaped surface 11 by the inclined surfaces 12a, 12b, 12c, and 12d. Are crushed sequentially from the side corresponding to the side toward the side corresponding to the peripheral edge of the mountain-shaped surface 11.

  That is, the mountain-shaped surface 11 of the protective plate 10 has a side other than the top corresponding to the central portion of the region surrounded by the spacer 9 with respect to the layer of the unpolymerized resin 16a. The side closer to is abutted later, and accordingly, the layer of the unpolymerized resin 16a is crushed in order from the center side toward the periphery.

  Therefore, the protective plate 10 is formed by removing the air between the mountain surface 11 and the layer of the unpolymerized resin 16a around the mountain surface 11, while the mountain surface 11 and the unpolymerized resin 16a. It is pressed against the layer of the unpolymerized resin 16a without confining air between the layer and the layer of the unpolymerized resin 16a so that the layer of the unpolymerized resin 16a is in close contact with the mountain-shaped surface 11 without gaps. Can be crushed.

  The protective plate 10 is formed by filling the unpolymerized resin 16a in the region surrounded by the spacer 9 in the gap between the liquid crystal display element 1 and the protective plate 10, and A peripheral flat surface (light shielding film 15 surface) is brought into contact with the spacer 9.

  The filling amount of the gap between the liquid crystal display element 1 and the protective plate 10 in the region surrounded by the spacer 9 in the unpolymerized resin 16a supplied on the observation surface of the liquid crystal display element 1 The surplus is over the spacer 9 as it is crushed by the crest surface 11 of the protective plate 10 and is pushed out to the outside, and the resin on the spacer 9 Is pushed out by bringing the flat surface of the protective plate 10 into contact with the spacer 9.

  Then, after the flat surface of the protective plate 10 is brought into contact with the spacer 9, the excess unpolymerized resin 16a pushed out of the spacer 9 is wiped off, and then the liquid crystal display element 1 and the protection The unpolymerized resin 16a filled in the region surrounded by the spacer 9 in the gap between the plate 10 is polymerized to complete the protection plate integrated display panel.

The unpolymerized resin 16a is made of a resin material having both ultraviolet polymerizability and thermal polymerizability, and the polymerization of the unpolymerized resin 16a maintains the pressurized state of the protective plate 10. Then, ultraviolet rays are irradiated from the outer surface side of the protective plate 10 for a certain period of time, and then the pressure of the protective plate 10 is released and heat treatment is performed for a certain period of time in a heating atmosphere maintained at the polymerization temperature of the resin material. By doing.

That is, the resin material having both ultraviolet polymerizable properties and heat polymerizable properties is ultraviolet polymerized by irradiating ultraviolet rays from the outer surface side of the protective plate 10 while maintaining the pressure of the protective plate 10, The liquid crystal display element 1 and the protective plate 10 are joined together by a layer of resin material that has been polymerized with ultraviolet light.

  The irradiation of the ultraviolet ray is performed for a time slightly longer than the time required for the resin material to undergo ultraviolet polymerization according to the characteristics of the resin material, and thereafter, that is, by the ultraviolet polymerization of the resin material, the liquid crystal display element 1. After the protective plate 10 is joined, the pressure is released.

  In the ultraviolet polymerization of the resin material, the ultraviolet light irradiated from the outer surface side of the protective plate 10 is blocked by the light shielding film 15 formed on the flat surface of the protective plate 10 facing the liquid crystal display element 1. In addition, when the protective plate 10 is printed for decoration or the like, the ultraviolet ray is blocked by the printed film. In the portion corresponding to the film, an insufficiently polymerized portion or an unpolymerized portion remains.

  The resin layer 16 in which the polymerization insufficient part and the unpolymerized part of the resin material layer by ultraviolet irradiation are thermally polymerized by heating to the polymerization temperature of the resin material after the ultraviolet irradiation, and the entire resin material layer is polymerized. Is formed.

  In the thermal polymerization of the resin material, since the liquid crystal display element 1 and the protective plate 10 are already bonded by ultraviolet polymerization of the resin material, the resin plate is maintained without maintaining the pressurized state of the protective plate 10. The heat treatment can be performed in a heated atmosphere maintained at the polymerization temperature of the material by heat treatment for a time required for the resin material to undergo thermal polymerization.

  In this manufacturing method, the mountain-like surface 11 is formed on the surface facing the liquid crystal display element 1 in the unpolymerized resin 16 a supplied to the region surrounded by the spacer 9 on the observation surface of the liquid crystal display element 1. The observed surface protecting plate 10 is applied to the layer of the unpolymerized resin 16a with a delay from the portion corresponding to the central portion of the region surrounded by the spacer 9 toward the side closer to the side of the region. The protective plate 10 is pressed in a state in which the unpolymerized resin 16a is filled in a region surrounded by the spacer 9 in the gap between the liquid crystal display element 1 and the protective plate 10 by pressing the contact plate with a time difference. Since the spacer 9 is brought into contact with the spacer 9, the liquid crystal display element 1 and the protective plate 10 can be joined without causing bubbles in the resin layer 16 for joining them.

  Moreover, in the said Example, the mountain-shaped surface 11 of the said protective plate 10 is formed in the area | region inside the part contact | abutted to the said spacer 9 among the surfaces facing the liquid crystal display element 1 of the said protective plate 10, Of the surface facing the liquid crystal display element 1, the portion in contact with the spacer 9 and the portion outside the surface are formed on a flat surface that is flush with the entire circumference of the protective plate 10. The plate 10 can be brought into contact with the spacer 9 without generating a gap therebetween.

  Moreover, in the above embodiment, the mountain-shaped surface 11 of the protective plate 10 is directed from the side corresponding to the four sides of the rectangular region surrounded by the spacer 9 to the side corresponding to the central portion of the region. In this way, the protective plate 10 is formed in a shape inclined in the direction protruding toward the liquid crystal display element 1, that is, in a shape inclined in four directions, so that the protective plate 10 is formed with its mountain surface 11 and the layer of the unpolymerized resin 16a. It is possible to more effectively prevent air bubbles from being generated in the resin layer 16 by pressing against the layer of the unpolymerized resin 16a while excluding the air between them to the periphery of the mountain-shaped surface 11.

Furthermore, in the above embodiment, the unpolymerized resin 16a consisting of the liquid crystal display of the resin layer 16 for bonding the element 1 and the said protective plate 10, a resin material having characteristics of both heat polymerizable ultraviolet polymerizable This layer is polymerized by ultraviolet irradiation and heating, so that no insufficiently polymerized portion or unpolymerized portion remains in the resin layer 16. Therefore, the bonding strength between the liquid crystal display element 1 and the protective plate 10 is not increased. Can be secured sufficiently.

  In addition, the thermal polymerization after the ultraviolet polymerization of the unpolymerized resin 16a made of the resin material having both the ultraviolet polymerization property and the thermal polymerization property is released from the pressurization of the protective plate 10 and left in the heating atmosphere. Therefore, the protection plate integrated display panel can be easily manufactured.

  In the above embodiment, the mountain surface 11 of the protective plate 10 is formed in the shape shown in FIG. 4, but this mountain surface 11 is opposed to at least the region surrounded by the spacer 9. Other shapes may be used as long as the shape is inclined from the side corresponding to the two edges toward the liquid crystal display element 1 toward the side corresponding to the center of the region.

  6 and 7 each show a modification of the mountain-shaped surface of the protective plate 10, and the mountain-shaped surface 11 a shown in FIG. 6 is a rectangular plane corresponding to the region surrounded by the spacer 9. Having a shape, having a dot-like top at the center of the rectangular part, the height of the top with respect to the flat surface of the peripheral part of the protective plate 10 is set smaller than the thickness of the spacer 9, Two inclined surfaces 13a and 13b heading from the two long sides of the rectangular portion toward the top are formed into triangular surfaces inclined at substantially the same inclination angle, respectively, and the two short sides of the rectangular portion are Two inclined surfaces 13c and 13d facing the top are formed in a triangular surface inclined at a gentler inclination angle than the inclination angles of the two long side inclined surfaces 13a and 13b, respectively, and are inclined in four directions. Is formed.

  7 has a rectangular planar shape corresponding to the region surrounded by the spacer 9, and the long surface 11b is formed at the center between two long sides of the rectangular portion. The height of the top with respect to the flat surface of the peripheral edge of the protective plate 10 is set to be smaller than the thickness of the spacer 9, and has a linear top parallel to the side and the same length as the long side, The two inclined surfaces 14a and 14b from the two long sides of the rectangular portion toward the top are formed in a rectangular shape inclined at substantially the same inclination angle, and are inclined in two directions. Yes.

  The mountain surface 11b shown in FIG. 7 is formed by forming inclined surfaces 14a and 14b on the side corresponding to the two long sides of the rectangular portion, but the mountain surface having a shape inclined in two directions. Has a linear apex that is parallel to the short side and has the same length as the short side at the center between the two short sides of the rectangular part, and these short sides have these short sides. Two inclined surfaces from the side toward the top may be formed.

(Second Embodiment)
FIG. 8 is a view showing a second embodiment of the manufacturing method of the protective plate integrated display panel of the present invention, and FIG. 9 is a cross-sectional view of the protective plate integrated display panel manufactured by the manufacturing method of this embodiment. In this embodiment, parts corresponding to those of the first embodiment described above are given the same reference numerals in the drawings, and the description of the same parts is omitted.

  In the manufacturing method of this embodiment, the observation surface protection plate 10a made of a flat transparent plate has a cylindrical surface shape in which a portion corresponding to the central portion of the region surrounded by the spacer 9 is expanded toward the liquid crystal display element 1 side. To the center of the layer of unpolymerized resin 16a supplied to the region surrounded by the spacer 9 on the observation surface of the liquid crystal display element 1, and then the protective plate 10a is bent The unpolymerized resin is applied to the region surrounded by the spacer 9 in the gap between the liquid crystal display element 1 and the protective plate 10a by pressing against the layer of the unpolymerized resin 16a while returning to the original flat state from the state. The protective plate 10a is brought into contact with the spacer 9 in a state filled with 16a, and then, the filled unpolymerized resin 16a is polymerized in the same manner as in the first embodiment. .

  In this embodiment, it is desirable that the protective plate 10a formed in a rectangular shape is curved in the longitudinal direction, and by doing so, the protective plate 10a can be bent without difficulty.

  According to this manufacturing method, in the protective plate 10a, the layer of the unpolymerized resin 16a has a portion other than the portion corresponding to the central portion of the region surrounded by the spacer 9 close to the side portion of the region. Since it can be pressed with a time difference in contact with the layer of the unpolymerized resin 16a with a delay toward the side, bubbles are generated in the resin layer 16 for joining the liquid crystal display element 1 and the protective plate 10a. The protective plate integrated display panel shown in FIG. 9 can be manufactured without joining.

(Third embodiment)
FIG. 10 is a view showing a third embodiment of the manufacturing method of the protective plate integrated display panel according to the present invention, and FIG. 11 is a sectional view of the protective plate integrated display panel manufactured by the manufacturing method of this embodiment. In this embodiment, parts corresponding to those of the first embodiment described above are given the same reference numerals in the drawings, and the description of the same parts is omitted.

  In the manufacturing method of this embodiment, an unpolymerized resin 16a having a viscosity that does not flow and spread due to its own weight in a region surrounded by the spacer 9 on the observation surface of the liquid crystal display element 1 is surrounded by the spacer 9. By feeding the chevron into a chevron with a portion corresponding to the center of the region formed on the top, pressing the observation surface protection plate 10b made of a flat transparent plate on the unpolymerized resin 16a layer, The protective plate 10b is brought into contact with the spacer 9 in a state where the unpolymerized resin 16a is filled in a region surrounded by the spacer 9 in the gap between the liquid crystal display element 1 and the protective plate 10b, and thereafter The filled unpolymerized resin 16a is polymerized in the same manner as in the first embodiment.

  In this embodiment, the supply of the unpolymerized resin 16a onto the observation surface of the liquid crystal display element 1 can control the thickness of the unpolymerized resin 16a in each part of the region surrounded by the spacer 9. It can be performed by a method that can be performed, for example, dropping or transferring with a dispenser. Further, the unpolymerized resin 16a may be supplied not only in the region surrounded by the spacer 9, but also in a state of protruding above the spacer 9 as shown in FIG.

  According to this manufacturing method, in the protective plate 10b, a portion other than the portion corresponding to the central portion of the region surrounded by the spacer 9 in the layer of the unpolymerized resin 16a is closer to the side portion of the region. Since it is possible to press the liquid crystal display element 1 and the protective plate 10b with a time difference in contact with the layer of the unpolymerized resin 16a with a delay toward the side, bubbles are generated in the resin layer 16 for joining them. The protective plate integrated type display panel shown in FIG. 11 can be manufactured without joining.

(Other embodiments)
In each of the above-described embodiments, the resin layer 16 for joining the liquid crystal display element 1 and the protective plate 10b is formed of a resin material having both ultraviolet polymerizable properties and thermally polymerizable properties. However, the resin layer 16 may be formed of a resin material having one of ultraviolet polymerizable property and thermal polymerizable property.

  In addition, the display panel integrated type display panel of the above-described embodiment is an example in which the liquid crystal display element 1 and the observation surface protection plates 10, 10a, 10b are integrated, but this invention is a display element other than the liquid crystal display element. For example, the present invention can also be applied to a protective plate integrated display panel in which an organic EL (electroluminescence) display element and an observation surface protective plate are integrated and the manufacture thereof.

1 is a plan view of a protection plate integrated display panel showing a first embodiment of the present invention; FIG. Sectional drawing which follows the II-II line | wire of FIG. Sectional drawing which follows the III-III line of FIG. The perspective view of the observation surface protection board in the protection board integrated display panel of a 1st Example. The figure which shows the manufacturing method of the protection plate integrated display panel of a 1st Example. The perspective view which shows the modification of the mountain-shaped surface of the said observation surface protection board. The perspective view which shows the other modification of the mountain-shaped surface of the said observation surface protection board. The figure which shows the 2nd Example of the manufacturing method of the protection plate integrated display panel of this invention. Sectional drawing of the protection plate integrated display panel manufactured by the method of the 2nd Example. The figure which shows the 3rd Example of the manufacturing method of the protection plate integrated display panel of this invention. Sectional drawing of the protection board integrated display panel manufactured by the method of the 3rd Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display element, 1a ... Screen area, 9 ... Spacer, 10, 10a, 10b ... Observation surface protection board, 11 ... Mountain surface, 12a, 12b, 12c, 12d, 13a, 13b, 13c, 13d, 14a, 14b ... inclined surface, 15 ... light shielding film, 16 ... resin layer, 16a ... unpolymerized resin.

Claims (11)

A display element;
A spacer affixed around the screen area of the display element on the first surface of the display element;
The transparent plate is disposed on the first surface side and is formed in a shape covering the first surface, and the surface facing the first surface of the two plate surfaces of the transparent plate, mountain-like surface having a shape inclined in a direction to protrude on the first surface toward the side corresponding to the four sides of the region surrounded by the spacer to each side corresponding to the central portion of the region is formed, A protective plate in contact with the spacer on the surface facing the first surface;
A resin layer filled in the region surrounded by the spacer gap and bonding the protective plate and the display element are polymerized after the filling between the protective plate and the display element,
Equipped with a,
A protective plate integrated display panel.   The mountain-shaped surface of the protection plate is formed in the region surrounded by the spacer in a surface facing the first surface, and a portion outside the mountain-shaped surface is the entire surface of the protection plate. 2. The protection plate integrated display panel according to claim 1, wherein the display panel is formed on a flat surface over the circumference.   The mountain-shaped surface of the protection plate has a top in the region, and the height of the top from the flat surface over the entire circumference of the protection plate is set to be smaller than the thickness of the spacer. The protection plate integrated display panel according to claim 1 or 2.   4. The protection according to claim 1, wherein a light shielding film is formed on the flat surface over the entire circumference of the protection plate so as to correspond to the outside of the screen area of the display element. Board-integrated display panel. The protective plate, the protective plate-integrated display panel according to any one of claims 1 to 4, characterized in that it consists of reinforced glass or acrylic resin plate. Refractive index after the polymerization of the resin layer can be of any claims 1 to 5, wherein the difference between the same or refractive index as that of the polarizing plate forming the first surface of the display element is small A protective plate integrated display panel according to claim 1. The resin layer, the protective plate-integrated display panel according to any one of claims 1 to 6, characterized by having the properties of both the thermal resistance and the ultraviolet polymerizable. Method of manufacturing display panel integrated display panel in which display element and protective plate arranged on first surface side of display element are filled in gap between them and bonded by resin layer polymerized after filling In
A step of pasting a spacer around the screen area of the display element on the first surface;
Supplying unpolymerized resin to a region surrounded by the spacer on the first surface;
A protective plate made of a transparent plate formed in a shape covering the first surface is arranged on the first surface side, and the protective plate is surrounded by the supplied unpolymerized resin layer with the spacer. The display element and the portion are pressed by providing a time difference in which a portion other than the portion corresponding to the central portion of the region is closer to the side of the region and is in contact with the unpolymerized resin layer with a delay. A step of bringing the protective plate into contact with the spacer in a state where the unpolymerized resin is filled in the region surrounded by the spacer in a gap between the protective plate;
Polymerizing the filled unpolymerized resin;
Equipped with a,
The protective plate faces a surface facing the first surface from a side corresponding to at least two sides facing each other of the region surrounded by the spacer toward a side corresponding to the central portion of the region. A transparent plate formed with a mountain-shaped surface inclined in a direction protruding to the first surface side;
Pressing the chevron surface of the protective plate against the unpolymerized resin layer;
A manufacturing method of a protective plate-integrated display panel. The unpolymerized resin is supplied to the entire region surrounded by the spacer on the first surface of the display element to be thicker than the spacer by means of dropping, transferring or screen printing by a dispenser. The method for manufacturing a protective plate-integrated display panel according to claim 8 . The resin layer has both characteristics of the thermally polymerizable ultraviolet polymerizable, the polymerization step protection plate according to claim 8 or 9, characterized in that it consists of the thermal polymerization step subsequent to UV polymerization step Manufacturing method of integrated display panel. The protective plate is formed on a surface facing the first surface from the side corresponding to the four sides of the region surrounded by the spacer toward the side corresponding to the central portion of the region. protective board manufacturing method of the integrated display panel of claim 8, wherein the benzalkonium such a transparent plate in which the mountain-shaped surface having a shape inclined in the direction to protrude to the surface side is formed.

Images