JP2010217342A - Protective plate integrated display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective plate integrated display apparatus that has sufficient strength and can reduce the width of a periphery of a screen area of a display panel. <P>SOLUTION: The display panel 10 is disposed on one surface side of a supporting member 4 having an opening 6 corresponding to a screen area 11a of the display panel 10 so that a peripheral edge of an optical film provided on an observation side surface thereof is fixed to the supporting member 4. The protective plate 32 is fixedly arranged on the other surface side of the supporting member 4, and a resin layer 34 is charged into at least the opening 6 of the supporting member 4 between the display panel 10 and protective plate 32. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a protective plate integrated display device.

  The protective plate-integrated display device has a display panel and a protective plate for protecting the surface on the observation side of the display panel joined by a resin layer filled in a gap between the display panel and the protective plate. And is mounted on an electronic device such as a mobile phone (see Patent Document 1).

Japanese Patent Laid-Open No. 11-174417

  However, the strength of the conventional protection plate integrated display device in which the display panel and the protection plate are simply joined by the resin layer is not sufficient.

  An object of the present invention is to provide a protective plate-integrated display device that has sufficient strength and can reduce the width of the peripheral portion of the screen area of the display panel.

The invention described in claim 1
In a protective plate integrated display device in which a display panel and a protective plate for protecting a surface on the observation side of the display panel are joined by a resin layer filled in a gap between the display panel and the protective plate ,
A plate-like support member having an opening corresponding to the screen area of the display panel;
The display panel is arranged on one surface side of the support member with the screen area facing the opening and a peripheral portion of an optical film provided on the observation side surface fixed to the support member. ,
The protective plate is arranged on the other surface side of the support member, with the peripheral edge of the protective plate fixed to the support member,
The resin layer is filled in at least an opening of the support member between the display panel and the protective plate.

  According to a second aspect of the present invention, in the protection plate integrated display device according to the first aspect, the optical film is a polarizing plate.

  According to a third aspect of the present invention, in the protection plate integrated display device according to the first or second aspect, the protection plate intermittently surrounds the opening between the support member and the protection plate. It is fixed to the support member via a plurality of provided spacers, and is arranged.

  According to a fourth aspect of the present invention, in the protection plate-integrated display device according to the first or second aspect, the protective plate continues the entire circumference of the opening between the support member and the protective plate. It is fixed to the support member via a frame-shaped spacer provided so as to be surrounded.

  According to a fifth aspect of the present invention, in the protection plate integrated display device according to any one of the first to fourth aspects, the display panel has the opening between the support member and the display panel. It is fixed to the support member via a plurality of adhesive layers that are intermittently provided in a surrounding manner.

  According to a sixth aspect of the present invention, in the protection plate integrated display device according to any one of the first to fourth aspects, the display panel has the opening between the support member and the display panel. It is characterized by being arranged fixed to the support member via a frame-shaped adhesive layer provided continuously surrounding the entire circumference.

  The invention according to claim 7 is the protective plate integrated display device according to any one of claims 2 to 6, wherein the spacer is made of a double-sided adhesive film.

  According to an eighth aspect of the present invention, in the protection plate integrated display device according to the fifth or sixth aspect, the adhesive layer is made of a double-sided adhesive film.

  The invention according to claim 9 is the protection plate integrated display device according to any one of claims 1 to 8, wherein the support member is a member constituting a display panel housing case, The display panel is disposed in the case with a peripheral portion of the observation side surface fixed to the inner surface of the support member, and the protection plate is disposed outside the case and fixed to the outer surface of the support member. It is characterized by being.

  A tenth aspect of the present invention is the protection plate integrated display device according to any one of the first to ninth aspects, wherein the display panel is a liquid crystal display panel. What is the observation side of the liquid crystal display panel? A surface light source for irradiating illumination light toward the liquid crystal display panel is disposed on the opposite side.

  According to the protection plate integrated display device of the present invention, the strength is sufficient, and the width of the peripheral portion of the screen area of the display panel can be reduced.

1 is a plan view of a protection plate integrated display device showing an embodiment of the present invention; Sectional drawing which abbreviate | omitted the center part of the said protective plate integrated display device. An enlarged view of a portion of FIG. The top view of the adhesion layer provided between the support member and display panel in the said protective plate integrated display device. The top view which shows the modification of the said adhesion layer. The top view which shows the filling state of the resin layer in the said protective plate integrated display device. The layer expanded sectional view in the VII-VII line of FIG. Sectional drawing of the part corresponding to FIG. 3 which shows a 1st comparative example. Sectional drawing of the part corresponding to FIG. 7 which shows a 2nd comparative example. The top view which shows the filling state of the resin layer in a 3rd comparative example. The top view which shows the modification of the spacer provided between the supporting member and protection plate in the said protection plate integrated display apparatus. The top view which shows the other modification of the said spacer. The top view which shows the other modification of the said spacer. The top view which shows the other modification of the said spacer. The top view which shows the other modification of the said spacer. The top view which shows the other modification of the said spacer. The top view which shows the other modification of the said spacer.

  Hereinafter, embodiments of the present invention will be described in detail.

  The protective plate integrated display device of the present invention is mounted in an electronic device such as a mobile phone or an electronic dictionary. As shown in FIGS. The display panel 10 arranged and a protective plate 32 for protecting the surface on the viewing side of the display panel 10 are provided.

  The protection plate integrated display device of this embodiment is provided with a liquid crystal display panel as the display panel 10, and is disposed on the opposite side to the observation side of the liquid crystal display panel 10, and faces the liquid crystal display panel 10. And a surface light source 20 that emits illumination light.

  The liquid crystal display panel 10 is arranged to face each other with a predetermined gap, and is connected to a viewing side and a pair of transparent substrates 12 and 13 on the opposite side joined via a frame-shaped sealing material 14 surrounding the screen area 11a. The liquid crystal layer 15 enclosed in the region surrounded by the sealing material 14 in the gap between the substrates 12 and 13, the observation side attached to the outer surfaces of the pair of substrates 12 and 13, and the opposite side Polarizing plates 16 and 17 as optical films.

  The liquid crystal display panel 10 is an active matrix liquid crystal display panel using TFTs (thin film transistors), for example, as active elements. Although not shown in the figure, the liquid crystal display panel 10 has a matrix in the row and column directions on the inner surface of the opposite substrate 13. A plurality of transparent pixel electrodes arranged in a row, a plurality of TFTs arranged corresponding to these pixel electrodes and connected to the corresponding pixel electrodes, and a gate signal to each row of TFTs A plurality of scanning lines, a plurality of signal lines for supplying data signals to the TFTs in each column, and a first alignment film formed so as to cover them are provided. Three color filters of red, green, and blue formed in correspondence with each pixel electrode, and the arrangement region of each pixel electrode on these color filters are opposed to each other. And unilamellar shaped transparent counter electrode formed, and a second alignment film formed to cover the counter electrode is provided.

  The opposite substrate 13 has, on one side thereof, a driver mounting portion 13a that protrudes outward from the observation-side substrate 12, and each of the scanning lines is provided on the driver mounting portion 13a. A driver element 18 for sequentially applying a gate signal to the signal line and applying a data signal to each signal line is mounted, and a wiring film 19 for connecting the driver element 18 to a driver control circuit (not shown) is connected. .

  The liquid crystal display panel 10 includes a TN type in which liquid crystal molecules are twisted with a twist angle of substantially 90 °, an STN type in which liquid crystal molecules are twisted with a twist angle of 180 ° to 270 °, and liquid crystal molecules. Vertical alignment type, which is aligned substantially perpendicular to the substrate surface, non-twisted horizontal alignment type, in which liquid crystal molecules are aligned substantially parallel to the substrate surface with the molecular long axis aligned in one direction, liquid crystal molecules Any of the bend alignment types for bend alignment may be used, and a ferroelectric or antiferroelectric liquid crystal display element may be used.

  Further, the liquid crystal display panel 10 is not limited to the one in which electrodes for forming a plurality of pixels are provided on the pair of substrates 12 and 13, and a plurality of pixels are formed on the inner surface of the substrate 13 on the opposite side. A plurality of elongate electrodes formed on the liquid crystal layer side of the first electrode and the substrate 13 side opposite to the first electrode and insulated from the first electrode. A horizontal electric field control type liquid crystal display panel in which a second electrode having an electrode portion is provided and a horizontal electric field (an electric field in a direction along the substrate surface) is generated between these electrodes to change the alignment state of liquid crystal molecules may be used.

  Further, the surface light source 20 is made of a plate-shaped transparent member, and an incident end face 22 for allowing light to enter is formed on one end face thereof, and an exit for emitting the light incident from the incident end face 22 on one of two plate faces. A light guide plate 21 formed with a reflection surface 24 for reflecting light incident on the other plate surface from the incident end surface 22 toward the output surface 23, and the incident end surface 22 of the light guide plate 21. A plurality of light emitting elements 25 such as LEDs (light emitting diodes) disposed to face each other, a diffusion layer 26 that is provided on the emission surface 23 of the light guide plate 21 and diffuses the emitted light from the light guide plate 21; It consists of two prism sheets 27 and 28 that are stacked on the diffusion layer 26.

  In FIG. 2, each of the prism sheets 27 and 28 is shown as a single film. However, one of the prism sheets 27 and 28, for example, the prism sheet 27 on the diffusion layer 26 side, has the light guide plate. A plurality of elongate prisms along the width direction of 21 (direction parallel to the incident end face 22 and the exit face 23) are formed at a dense pitch, and the other prism sheet 28 has a longitudinal direction of the light guide plate 21 (the guide light). A plurality of elongated prisms along a direction perpendicular to the width direction of the optical plate 21 and parallel to the emission surface 23 are formed at a dense pitch.

  Each of the light emitting elements 25 is provided on a light source circuit board 29 on which a lighting circuit of the light emitting elements 25 is formed, and the side edge portion of the circuit board 29 is disposed on the emission surface of the light guide plate 21. The light guide plate 21 is disposed so as to oppose the light incident end face 22 by being attached to an end of the light guide end face 22 with a double-sided adhesive tape 30.

  The surface light source 20 emits the light emitted from each light emitting element 25 and incident on the light guide plate 21 from the incident end face 22 from the entire exit surface 23 of the light guide plate 21, and the light is diffused. The light is diffused by the layer 26 and further refracted by the two prism sheets 27 and 28 so that the angle with respect to the normal direction of the light exit surface 23 of the light guide plate 21 is reduced. Illumination light having a high intensity distribution is emitted.

  On the other hand, the case 1 includes a rectangular frame-shaped resin frame 2 having a space larger than the outer shape of the liquid crystal display panel 10 and the surface light source 20, a bottom plate 3 a having a shape corresponding to the outer shape of the frame 2, and the bottom plate 3 a. The lower case 3 made of a metal plate comprising a side plate 3b bent upward from the periphery, the upper surface plate 4a having a shape corresponding to the outer shape of the lower case 3, and the lower surface 3 bent downward from the periphery of the upper surface plate 4a It is comprised by the upper case 4 made from a metal plate which consists of the side plate 4b.

  In this case 1, the lower case 3 is fitted to the frame 2, the bottom plate 3 a of the lower case 3 is brought into contact with the lower surface of the frame 2, and the upper case 4 is fitted to the upper case 4. The face plate 4a is brought into contact with the upper surface of the frame 2, and the side plate 4b is fitted over the side plate 3b of the upper case 4 so as to be assembled.

  Although not shown in the drawing, a plurality of protrusions are provided on the outer peripheral surface of the frame 2, and the side plates 3b and 4b of the lower case 3 and the upper case 4 respectively correspond to the protrusions. A plurality of retaining holes are provided, and the lower case 3 and the upper case 4 are respectively engaged with the frame 2 by fitting the retaining holes into the protrusions.

  The surface light source 20 is formed on the bottom plate 3a of the lower case 3 fitted to the frame 2 on the side opposite to the emission side of the illumination light, that is, the reflective surface 24 of the light guide plate 21. It is arrange | positioned facing.

  A reflective film 5 is formed on the bottom plate 3 a of the lower case 3 to reflect the leaked light from the reflective surface 24 of the light guide plate 21 of the surface light source 20 and re-enter the light guide plate 21. The surface light source 20 is disposed with the reflection surface 24 of the light guide plate 21 in contact with the reflection film 5.

  The upper case 4 also serves as a support member that supports the liquid crystal display panel 10 and the protection plate 32. A rectangular opening 6 corresponding to the screen area 11 a of the liquid crystal display panel 10 is provided in the upper surface plate 4 a of the upper case 4, and the liquid crystal display panel 10 defines the screen area 11 a in the upper case 4. The peripheral edge of the polarizing plate 16 provided on the observation side surface of the liquid crystal display panel 10 is disposed between the inner surface of the upper case 4 and the liquid crystal display panel 10. It arrange | positions so that it may fix to the inner surface of the said upper case 4 with the adhesion layer 31 provided in the surroundings.

  The opening 6 of the upper case 4 is formed so as to correspond to a region other than the end portion on the incident end face 22 side of the light guide plate 21 of the surface light source 20, and the liquid crystal display panel 10 has its screen. The area 11 a is opposed to the opening 6, and the driver mounting portion 13 a is disposed so as to correspond to the arrangement side of the light emitting element 25 of the surface light source 20.

  As shown in FIG. 4, the adhesive layer 31 is made of a double-sided adhesive film formed in a frame shape that continuously surrounds and surrounds the entire circumference of the opening 6, and the liquid crystal display panel 10 has a peripheral portion. It is continuously connected over the entire circumference and is arranged to be fixed to the inner surface of the upper case 4 by the adhesive layer 31.

  In addition, the adhesive layer 31 has a frame-like shape in which a plurality of double-sided adhesive films 31a, 31b, 31c, 31d formed in a rectangular shape are abutted with each other as in the modification shown in FIG. The plurality of double-sided adhesive films 31a, 31b, 31c, and 31d may be formed so as to be continuously connected to each other.

  The protective plate 32 is made of a transparent plate such as a glass plate or an acrylic resin plate, and is arranged so that the peripheral edge thereof overlaps the upper surface plate 4 a of the upper case 4. Specifically, the opening 6 is rectangular and has four sides as edges, and the protection plate 32 is rectangular and has four edges arranged along each side of the opening 6. And the protection plate 32 has four regions corresponding to each of the sides of the opening 6 and the edges of the protection plate 32 arranged along the sides, respectively. It overlaps with the upper surface plate 4a.

  Then, at least one of the four regions, that is, in this embodiment, the region overlapping with the driver mounting portion 13a of the liquid crystal display panel 10 is arranged along that region of the sides of the opening 6. Further, a length along the direction perpendicular to the side of the opening 6 (the protruding direction of the protective plate 32) (the protruding width of the protective plate 32) is formed in a shape larger than the other regions of the four regions. Has been.

  On the other hand, the polarizing plate 16 or the observation side substrate 12 of the liquid crystal display panel 10 is arranged so that the peripheral edge thereof overlaps the upper surface plate 4 a of the upper case 4. Specifically, the polarizing plate 16 or the observation-side substrate 12 of the liquid crystal display panel 10 has a rectangular shape having four edges disposed along each side of the opening 6, and the liquid crystal display panel 10. The polarizing plate 16 or the observation-side substrate 12 of the liquid crystal display panel 10 arranged along each side of the opening 6 and the edges of the polarizing plate 16 or the observation-side substrate 12, respectively. And the upper plate 4a of the upper case 4 in four regions corresponding to each other. Here, a direction perpendicular to the side of the opening 6 arranged along each region is referred to as a projecting direction of the liquid crystal display panel 10, and a length along the projecting direction of the liquid crystal display panel 10 is referred to as the liquid crystal display. This is called the overhang width of the panel 10.

  As described above, the protective plate 32 extends so that the peripheral edge thereof overlaps the periphery of the opening 6 of the upper case 4, and the protruding width of at least one edge of the peripheral edge is the other edge. It is formed in a shape larger than the overhanging width, and intermittently surrounding the opening 6 between the outer surface of the upper case 4 and the protective plate 32 outside the case 1, that is, on the upper case 4. Are fixed to the outer surface of the upper case 4 via a plurality of spacers 33a and 33b provided in the upper case 4.

  In this embodiment, the protective plate 32 has an extended width of an edge overlapping with the driver mounting portion 13a of the liquid crystal display panel 10 among the peripheral edge protruding around the opening 6 of the upper case 4 as the other edge. It is formed in a shape larger than the overhang width.

  As shown in FIG. 6, the spacers 33 a arranged along the edges of the plurality of spacers 33 a and 33 b where the overhang width of the protection plate 32 is small are parallel to the edges of the opening 6. Each spacer 33b, which is formed in an elongated rectangular shape whose direction is the long axis and is arranged along the edge portion where the protruding width of the protective plate 32 is large, has a long axis in the direction parallel to the protruding direction of the protective plate 32. And is formed so as to be continuously connected from the edge of the opening 6 to the edge of the protection plate 32.

  Each of the plurality of spacers 33 a and 33 b is made of a double-sided adhesive film, and each spacer 33 a arranged along the edge portion where the overhang width of the protective plate 32 is small is parallel to the edge portion of the opening 6. The length of the protective plate 32 is longer than the length of the protective plate 32 along the protruding direction, and is arranged at the edge of the opening 6, and the protective plate 32 is arranged along the edge where the protruding width is large. Each of the spacers 33 b is formed in a shape in which the length along the protruding direction of the protection plate 32 is longer than the length along the direction parallel to the edge of the opening 6. Further, in this embodiment, each spacer 33b has a side along the protruding direction of the protection plate 32 of each spacer 33b, and an edge portion on the side where each spacer 33b of the edge portion of the opening 6 is disposed. Are arranged in parallel to each other in a direction substantially perpendicular to. The spacers 33b are arranged such that the sides along the protruding direction of the protective plate 32 are parallel to each other and at a predetermined interval.

  The protective plate 32 is arranged to be fixed to the outer surface of the upper case 4 by a plurality of spacers 33a and 33b made of the double-sided adhesive film, and the outer surface of the upper case 4 and the protective plate 32 An air vent that opens to the outside from the region surrounded by the plurality of spacers 33a, 33b is formed in the portion between the adjacent spacers 33a, 33a, 33b, 33b, and 33a, 33b, respectively. Are arranged.

  Further, a transparent resin layer 34 is filled in the opening 6 of the upper case 4 between the liquid crystal display panel 10 and the protective plate 32 and the region surrounded by the plurality of spacers 33a and 33b. The liquid crystal display panel 10 and the protective plate 32 are joined by curing the filled resin layer 34.

  The resin layer 34 is formed as follows. That is, first, before the protective plate 32 and the liquid crystal display panel 10 are fixedly arranged, a resin having a thermosetting property, a photocurable property, or both a photocurable property and a thermosetting property is used. Then, the liquid crystal display panel 10 is supplied to the liquid crystal display panel 10 that is fixed to the inner surface of the upper case 4. In this case, the resin may be supplied onto the surface of the protective plate 32 that is fixed to the inner surface of the upper case 4 and that faces the liquid crystal display panel 10.

  Next, the protective plate 32 is overlaid on the upper case 4 and pressed, so that the protective plate 32 is fixed to the outer surface of the upper case 4 by the plurality of spacers 33a and 33b. At the same time, the supplied resin is spread and the inside of the opening 6 of the upper case 4 between the liquid crystal display panel 10 and the protective plate 32, the adhesive layer 31 and the plurality of spacers 33a, The entire region surrounded by 33b is filled. Furthermore, the resin layer 34 is formed by curing the resin in that state.

  In the formation of the resin layer 34, the supplied resin causes the air in the space between the liquid crystal display panel 10 and the protection plate 32 to flow between the adjacent spacers 33a, 33a, 33b, 33b, and 33a. , 33b is pushed out while being removed from the air vent portion, and excess resin is filled from the air vent portion as shown in FIGS.

  The case 1 is assembled by mounting the upper case 4 to which the liquid crystal display panel 10 and the protection plate 32 are attached to the frame 2 and the lower case 3 in which the surface light source 20 is accommodated. A side surface of the case 1 is provided with a lead-out port for the wiring film 19 connected to the driver mounting portion 13a of the liquid crystal display panel 10, and the wiring film 19 and the light source circuit board 29 are connected to an external circuit. A lead wire (not shown) for connecting to is pulled out of the case 1 from the outlet.

  The protective plate integrated display device is arranged such that the peripheral edge thereof overlaps the upper surface plate 4 a of the upper case 4. That is, in the protection plate integrated display device, the upper case 4 which is a part of the display panel housing case 1 is used as a support member that supports the liquid crystal display panel 10 and the protection plate 32, and the liquid crystal display panel 10 is arranged on the inner surface side of the upper case 4 such that the screen area 11a faces the opening 6 provided in the upper case 4 and the peripheral portion of the observation side surface is fixed to the upper case 4. The protective plate 32 is disposed on the outer surface side of the upper case 4 via a plurality of spacers 33 a and 33 b provided intermittently between the upper case 4 and the protective plate 32 so as to surround the opening 6. While being fixed to the upper case 4, the resin is disposed in the opening 6 of the upper case 4 between the liquid crystal display panel 10 and the protective plate 32 and in a region surrounded by the plurality of spacers 33a and 33b. 34, and the liquid crystal display panel 10 and the protection plate 32 are joined by the resin layer 34. Therefore, the liquid crystal display panel 10 and the protection plate 32 are reinforced from the periphery by the upper case 4. Therefore, the strength against bending or the like is sufficient.

  In addition, as shown in FIG. 3, the protective plate integrated type display device includes the liquid crystal display panel 10, the peripheral portion of the polarizing plate 16 provided on the observation side surface of the upper case 4 by the adhesive layer 31. Since it is fixed on the inner surface, the width of the portion 11b around the screen area 11a of the liquid crystal display panel 10 can be reduced.

  That is, as shown in FIG. 8, the liquid crystal display panel 10 is placed on the upper case with the adhesive layer 31 at a portion outside the polarizing plate 16 provided on the observation side surface, that is, a peripheral portion of the observation side substrate 12. In the first comparative example, which is fixedly disposed on the inner surface of 4, the peripheral portion of the observation-side substrate 12 is placed on the polarized light in order to fix the liquid crystal display panel 10 to the upper case 4 with sufficient strength. The overlapping width of the adhesive layer 31 must be ensured by projecting around the plate 16, and for this purpose, it is necessary to increase the width of the portion 11 b around the screen area 11 a of the liquid crystal display panel 10. The outer shape of the liquid crystal display panel 10 is considerably larger than the size of the screen area 11a.

  On the other hand, in the protection plate integrated display device of the above embodiment, the peripheral edge of the polarizing plate 16 provided on the observation side surface of the liquid crystal display panel 10 is fixed to the inner surface of the upper case 4 by the adhesive layer 31. Therefore, unlike the first comparative example, it is not necessary to greatly extend the peripheral edge of the observation side substrate 12 around the polarizing plate 16, and accordingly, the screen area of the liquid crystal display panel 10 Since the width of the portion 11b around 11a can be reduced, the outer shape of the liquid crystal display panel 10 can be reduced, and the display device can be downsized.

  Further, in the protection plate integrated display device of the above embodiment, the liquid crystal display panel 10 is formed in a frame shape as shown in FIG. 4 or 5 that continuously surrounds the entire circumference of the opening 6 of the upper case 4. The protective layer 32 is disposed so as to be fixed to the inner surface of the upper case 4 by the adhesive layer 31 formed, and the protective plate 32 is provided on the upper case 4 by a plurality of spacers 33a and 33b provided intermittently surrounding the opening 6. Since it is arranged so as to be fixed to the outer surface and an air vent is formed between the spacers 33a and 33b, an excess is required when filling the resin layer 34 between the liquid crystal display panel 10 and the protective plate 32. No resin protrudes to the liquid crystal display panel 10 side.

  That is, as shown in FIG. 9, the liquid crystal display panel 10 is arranged so as to be fixed to the inner surface of the upper case 4 by a plurality of adhesive layers 35 that are intermittently provided surrounding the opening 6 of the upper case 4. Then, an air vent is formed between the adhesive layers 35, and the outer surface of the upper case 4 is formed by a spacer 36 formed in a frame shape surrounding the protective plate 32 by continuously connecting the entire circumference of the opening 6. In the second comparative example arranged so as to be fixed to the liquid crystal display panel 10, when the resin layer 34 is filled between the liquid crystal display panel 10 and the protective plate 32, excess resin protrudes around the liquid crystal display panel 10, and the protrusion When the amount is large, the protruding resin hits the frame 2, or the protruding resin wraps around the surface opposite to the observation side of the liquid crystal display panel 10 and hits the surface light source 20, Or longer can be assembled, it can affect the placement of such other electronic components to the vicinity of the liquid crystal display panel 10.

  On the other hand, in the protection plate integrated display device of the above embodiment, the excess resin does not protrude to the liquid crystal display panel 10 side, so that the assembly of the case 1 can be performed without hindrance, and the liquid crystal display panel Other electronic components and the like can be arranged in the vicinity of 10 without any obstacles.

  In this protective plate integrated display device, when the excessive resin is allowed to protrude to the liquid crystal display panel 10 side to some extent, the protective plate 32 is opened as in the above embodiment. For fixing and arranging the liquid crystal display panel 10 on the inner surface of the upper case 4 while fixing it to the outer surface of the upper case 4 by a plurality of spacers 33a and 33b provided intermittently around the The adhesive layer 31 is intermittently provided surrounding the opening 6 of the upper case 4, and an air vent is formed between the plurality of spacers 33 a and 33 b and between the plurality of adhesive layers 31, respectively. It is also possible to cause the resin to protrude to both the protective plate 32 side and the liquid crystal display panel 10 side, and in this way, the amount of excess resin protruding to the liquid crystal display panel 10 side is It can be reduced as compared with the serial second comparative example.

  Furthermore, in the protection plate integrated display device of the above embodiment, each spacer 33b disposed along the edge of the plurality of spacers 33a and 33b that has a large projecting width from the opening 6 of the protection plate 32 is provided. In the resin layer 34 filled between the liquid crystal display panel 10 and the protective plate 32, the edge of the opening 6 is continuously connected to the edge of the protective plate 32. Air accumulation can be prevented.

  That is, the peripheral edge of the protective plate 32 projects around the opening 6 of the upper case 4, and at least one edge of the peripheral edge (in the above embodiment, the driver mounting portion 13a of the liquid crystal display panel 10). The edge of the protective plate 32 facing the upper case 4 is opposed to the edge of the upper case 4. The length of the region along the overhanging direction is opposed to the upper case 4 with a width larger than the length along the overhanging direction of the region where the other edge and the upper case 4 are opposed.

  Therefore, as shown in FIG. 10, the spacers 33 b arranged along the edge portions where the projecting width of the protective plate 32 from the opening 6 is large are similar to the spacers 33 a arranged along the other edge portions. In the first comparative example in which the length along the projecting direction is formed in a shape shorter than the length along the direction parallel to the edge of the opening 6 and arranged at the edge of the opening 6, The resin that protrudes from the air vents between the spacers 33b and 33b arranged along the edge where the overhang width of the protection plate 32 extends is spread between the protection plate 32 and the upper case 4 and adjacent to each other. Resins that protrude from the air vent part are connected to each other, and air is trapped between the connection part of the protruded resin and the spacer 33b to cause an air reservoir A.

  Therefore, in the protection plate integrated display device according to the third comparative example, the air reservoir A expands in a high temperature environment, and corresponds to the screen area 11a such as the screen area 11a of the liquid crystal display panel 10. Otherwise, display quality may be impaired.

  On the other hand, as shown in FIG. 6, the protection plate integrated display device of the above embodiment includes the spacers 33 b arranged along the edges of the protection plate 32 that extend from the opening 6. Since it is formed so as to be continuously connected from the edge of the opening 6 to the edge of the protection plate 32, the space between the spacers 33b and 33b arranged along the edge where the overhang width of the protection plate 32 is large. The resin that protrudes from the air vents is not connected between the protective plate 32 and the upper case 4 as in the first comparative example, and does not cause an air pocket in the resin layer 34.

  As described above, the protection plate integrated display device of the above embodiment can maintain good display quality because there is no air pool in the resin layer 34.

  In the above embodiment, the spacers 33b arranged along the edge of the protection plate 32 extending from the opening 6 have a long and narrow rectangular shape having a long axis parallel to the extension direction of the protection plate 32. The spacers 33b are formed in an elongated shape having a long axis that is connected continuously from the edge of the opening 6 to the edge of the protection plate 32 and parallel to the protruding direction of the protection plate 32. For example, the shape is not limited to an elongated rectangular shape, but may be an arbitrary shape such as a rhombus shape as shown in FIG. 9, a blade cross-sectional shape as shown in FIG. 10, or an elliptical shape as shown in FIG. 11.

  Further, each spacer 33b is not limited to an elongated shape as long as it does not retain air in the resin layer 34, and is parallel to the square shape as shown in FIG. 12 or the edge as shown in FIG. A rectangular shape having a long axis or a circular shape as shown in FIG. 14 may be used, and a shape such as a dot shape as shown in FIG. 15 that is not continuously connected from the edge of the opening 6 to the edge of the protective plate 32. It may be.

  Further, as described above, when the adhesive layer 31 for fixing and arranging the liquid crystal display panel 10 on the inner surface of the upper case 4 is intermittently provided surrounding the opening 6 of the upper case 4, The plurality of adhesive layers 31 are formed so that the length along the projecting direction of the liquid crystal display panel 10 is longer than the length along the direction parallel to the edge of the opening 6, similarly to the spacer 33 b of the above embodiment. It may be formed and arranged at the edge of the opening 6.

  In this case, in particular, each of the adhesive layers 31 disposed along the edge of the liquid crystal display panel 10 having a large overhanging width among the plurality of adhesive layers 31 is moved from the edge of the opening 6 to the liquid crystal display panel. 10 in the resin layer 34 filled between the liquid crystal display panel 10 and the protective plate 32 by continuously forming the polarizing plate 16 or the observation side substrate 12 so as to be continuously connected to the periphery. It is possible to prevent accumulation. Further, only one spacer surrounding the opening 6 of the upper case 4 may be provided, and the one spacer may be formed to continuously connect the entire circumference of the opening 6 of the upper case 4. Further, each adhesive layer 31 may be a spacer made of a double-sided adhesive film formed in a tape shape.

  Further, the protective plate 32 is not limited to the shape having an edge portion with a large protruding width from the opening 6 of the upper case 4 as in the above embodiment, and the protruding width from all the edge portions to the opening 6 is not limited. The spacers 33a and 33b may be formed in a small shape, in which case the length along the direction parallel to the edge of the opening 6 is longer than the length along the protruding direction of the protective plate 32. Alternatively, it may be formed in a long shape and provided along each edge of the opening 6.

  The protective plate integrated display device of the above embodiment includes the liquid crystal display panel 10 provided with polarizing plates 16 and 17 on the observation side and the opposite surface, respectively. 10 may be one in which a plurality of optical films including a retardation plate for improving contrast, viewing angle, and the like and the polarizing plate 16 are laminated on the surface on the observation side.

  Furthermore, the protective plate integrated display device of the above embodiment includes the liquid crystal display panel 10 as a display panel. However, the display panel is not limited to the liquid crystal display panel, and at least the optical film on the observation side surface. Is provided, for example, on the observation side surface, a quarter wavelength retardation plate (λ / 4 plate) for preventing reflection of external light from the surface and a polarizing plate are arranged so as to overlap each other. A light-emitting display panel such as an electroluminescence display panel may be used. In that case, the surface light source 20 in the above embodiment is not necessary.

  Further, the protection plate integrated display device of the above embodiment includes a display panel housing case 1, and the display panel and the protection plate 32 are supported by the upper case 4 of the members constituting the case 1. However, the support member that supports the display panel and the protection plate 32 may be another plate-like member.

  DESCRIPTION OF SYMBOLS 1 ... Display panel accommodation case, 2 ... Frame, 3 ... Lower case, 4 ... Upper case (support member), 6 ... Opening, 10 ... Liquid crystal display panel, 11a ... Screen area, 16, 17 ... Polarizing plate, 20 ... Surface Light source, 31 ... adhesive layer, 32 ... protective plate, 33a, 33b ... spacer, 34 ... resin layer.

Claims (10)

In a protective plate integrated display device in which a display panel and a protective plate for protecting a surface on the observation side of the display panel are joined by a resin layer filled in a gap between the display panel and the protective plate ,
A plate-like support member having an opening corresponding to the screen area of the display panel;
The display panel is arranged on one surface side of the support member with the screen area facing the opening and a peripheral portion of an optical film provided on the observation side surface fixed to the support member. ,
The protective plate is arranged on the other surface side of the support member, with the peripheral edge of the protective plate fixed to the support member,
The protective plate integrated display device, wherein the resin layer is filled in at least an opening of the support member between the display panel and the protective plate.   The protective plate integrated display device according to claim 1, wherein the optical film is a polarizing plate.   The said protective plate is fixed and arrange | positioned at the said supporting member through the some spacer provided intermittently surrounding the said opening between the said supporting member and the said protective plate, It is characterized by the above-mentioned. Item 3. The protective plate integrated display device according to Item 1 or 2.   The protection plate is fixedly disposed on the support member via a frame-shaped spacer provided continuously surrounding the entire periphery of the opening between the support member and the protection plate. 3. The protective plate integrated display device according to claim 1, wherein the protective plate is integrated with the display device.   The display panel is arranged to be fixed to the support member via a plurality of adhesive layers provided intermittently surrounding the opening between the support member and the display panel. The protective plate integrated display device according to any one of claims 1 to 4.   The display panel is fixed and arranged on the support member via a frame-shaped adhesive layer provided continuously surrounding the entire circumference of the opening between the support member and the display panel. The protective plate integrated display device according to claim 1, wherein:   The protective plate integrated display device according to claim 2, wherein the spacer is made of a double-sided adhesive film.   The protective plate integrated display device according to claim 5, wherein the adhesive layer is made of a double-sided adhesive film.   The support member is composed of a member constituting a display panel housing case, and the display panel is disposed in the case with a peripheral portion of the observation side surface fixed to an inner surface of the support member, The protection plate-integrated display device according to claim 1, wherein the protection plate is disposed outside the case and fixed to the outer surface of the support member.   2. The display panel according to claim 1, wherein the display panel is a liquid crystal display panel, and a surface light source for irradiating illumination light toward the liquid crystal display panel is disposed on a side opposite to the viewing side of the liquid crystal display panel. The protective plate integrated display device according to any one of claims 1 to 9.

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