JP2015225224A - Electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic device capable of improving the removability of a panel from a support member.SOLUTION: The electronic device includes: plural panels 1 each having at least one light emitter; a support member 3 that supports plural panels; and plural adhesive layers 2a which are disposed between the plural panels 1 and the support member 3 to fix the plural panels 1 to the support member 3, the adhesive power of which decreases when an energy is given.

Description

  The present application relates to an electronic device in which a plurality of panels are arranged, and more particularly to a display device in which a plurality of organic EL (electroluminescence) panels are arranged.

  In recent years, an increase in the size of a display device has been demanded. In particular, with the development of organic EL elements, a large display device having a wide viewing angle and excellent image quality is expected. Furthermore, it is required to realize light weight and low power driving.

  A large display device having a large display area can be realized using a single large display panel. However, from the viewpoint of manufacturing, transportation, and maintenance, it is considered advantageous to realize a large display area by arranging a plurality of small display panels in a matrix.

  In the large display device disclosed in Patent Document 1, a plurality of display panels are arranged in a matrix. Each display panel is formed by attaching a display unit to the front surface of a support (base) and curving the lead electrode portion on the back surface of the base. The electrode part is connected to a drive part arranged on the back surface of the substrate.

  In the large display device disclosed in Patent Document 2, a plurality of organic EL panels are arranged on a large-area support.

  The “panel” in the present specification includes, for example, an organic EL panel, a liquid crystal panel, and an LED panel.

JP 2011-215380 A JP 2009-139463 A

  In the conventional technology described above, improvement in ease when removing the panel from the support body has been demanded.

  One non-limiting exemplary embodiment of the present application provides an electronic device that can improve ease when removing a panel from a support.

  In order to solve the above problems, an embodiment of the present invention is an electronic device in which a plurality of panels each having at least one light-emitting element are arranged, and a support body that supports the plurality of panels; and the plurality of panels A plurality of adhesive layers that are arranged between the support and the plurality of panels and fix the plurality of panels to the support. Including equipment.

  According to one embodiment of the present invention, the ease of removing a panel from a support can be improved.

1 is a schematic perspective view showing a configuration of a panel unit 10 according to an exemplary embodiment 1. FIG. 1 is a schematic external view of a display device 100 according to an exemplary embodiment 1. FIG. 3 is a schematic cross-sectional view showing a configuration of a pixel formed on the display panel 1. FIG. FIG. 3 is a schematic diagram showing a state in which the panel unit 10 is fixed to a fixed substrate 20 FIG. 6 is a schematic external view of a display device 100 according to a modification of exemplary embodiment 1. It is a typical perspective view which shows the structure of the panel unit 10 by example Embodiment 2. FIG. FIG. 10 is a schematic external view of a display device 100 according to a modification of exemplary embodiment 2. It is a typical perspective view which shows the structure of the panel unit 10 by illustrative Embodiment 3. FIG. FIG. 11 is a schematic external view of a display device 100 according to a modification of exemplary Embodiment 3.

  Hereinafter, the problems considered by the present inventors will be described.

  When a large display device is realized by arranging a plurality of small display panels, the display panel is attached to a support using an adhesive. Although the above-mentioned documents do not mention the material of the pressure-sensitive adhesive, it is generally considered that an acrylic pressure-sensitive adhesive having a strong adhesive force is used. When such an adhesive is used, the display panel can be firmly fixed to the support. However, it is difficult to easily remove the display panel from the support. When a defect occurs in some of the plurality of display panels in the large display device, it is difficult to easily replace only the display panel in which the defect has occurred. Eventually, the display device itself is discarded.

  In view of such problems of the prior art, the present inventor has come up with an electronic device having a novel structure. The outline of one embodiment of the present invention is as follows.

  An electronic device according to one embodiment of the present invention is an electronic device in which a plurality of panels having at least one light-emitting element are arranged, and a support that supports the plurality of panels, the plurality of panels, and the support A plurality of pressure-sensitive adhesive layers that fix the plurality of panels to the support, and that are provided with a plurality of pressure-sensitive adhesive layers that decrease in adhesive strength when energy is applied thereto.

  According to this aspect, by applying energy to the pressure-sensitive adhesive layer, the pressure-sensitive adhesive force of the pressure-sensitive adhesive layer is reduced, and the panel can be easily peeled off from the support. As a result, only the panel where the defect has occurred can be easily replaced.

  In one embodiment, when the energy is applied to at least one adhesive layer among the plurality of adhesive layers, at least one of the plurality of panels corresponding to the at least one adhesive layer is peeled from the support. Can be done.

  In one embodiment, the energy may be thermal energy.

  Thereby, when heat energy is applied to the pressure-sensitive adhesive layer, the pressure-sensitive adhesive force of the pressure-sensitive adhesive layer is reduced, and the panel can be easily peeled off from the support.

  In one embodiment, the plurality of adhesive layers may be formed of a material that reduces the adhesive strength when heated to 100 ° C. or higher.

  Thereby, the performance of the electronic device within a general guaranteed temperature range can be maintained.

  In a certain aspect, the heat-releasable pressure-sensitive adhesive containing an adhesive main agent and a foaming agent may be used as the material having a reduced adhesive strength.

  Thereby, a heat-peelable pressure-sensitive adhesive can be easily generated using a general material.

  A certain aspect WHEREIN: You may further provide the some heat generating body which produces | generates the said thermal energy.

  Thereby, heat energy can be supplied to the adhesion layer.

  In one embodiment, the plurality of heating elements may be disposed between the support and the plurality of adhesive layers.

  Thereby, a heat energy can be efficiently provided to an adhesion layer from a heating element.

  In one aspect, each of the plurality of heating elements may be formed from a heating wire or a coil, and the heat energy may be generated by a current flowing through the heating wire or the coil.

  Thereby, a thermal energy can be provided to an adhesion layer by sending an electric current through a heating wire or a coil.

  In one embodiment, each of the plurality of heating elements may be a heating wire formed of a metal wiring or a resistor.

  Thereby, the medium which gives a heat energy to an adhesion layer can be formed easily.

  In one embodiment, both ends of the heating wire may be disposed in a region of the support corresponding to a region where a gap between adjacent panels is located.

  Thereby, a probe can be inserted from the outside into the gap between adjacent panels, and a voltage can be applied to both ends of the heating wire.

  In one embodiment, the energy may be light energy.

  Thereby, when light energy is applied to the pressure-sensitive adhesive layer, the pressure-sensitive adhesive force of the pressure-sensitive adhesive layer decreases, and the panel can be easily peeled off from the support.

  In one embodiment, the plurality of adhesive layers may be formed of a material whose adhesive force is reduced by ultraviolet rays.

  Thereby, when the adhesive layer is irradiated with ultraviolet rays, the adhesive strength of the adhesive layer is reduced, and the panel can be easily peeled off from the support.

  In one embodiment, the material having a reduced adhesive strength may be an ultraviolet peelable adhesive that includes an adhesive main agent and a photopolymerizable resin.

  Thereby, an ultraviolet peeling adhesive can be easily produced using a general material.

  In one embodiment, the support body may include a plurality of support members respectively corresponding to the plurality of panels.

  Thereby, a large display device can be easily formed.

  In one embodiment, each of the plurality of panels may be an organic EL panel.

  Thereby, when energy is applied to the adhesive layer, the adhesive strength of the adhesive layer is reduced, and the organic EL panel can be easily peeled off from the support. As a result, only the organic EL panel in which a defect has occurred can be easily replaced.

  In one embodiment, each of the plurality of organic EL panels may be a flexible panel including a substrate formed from a flexible base material.

  Thereby, the electronic device which is light and has a curved surface can be realized.

  According to one aspect of the present invention, when energy is applied to the adhesive layer, its adhesive strength decreases. Only the panel in which the defect has occurred can be easily peeled off from the support. As a result, maintenance is facilitated and repair costs are reduced.

  Embodiments of the present invention will be described below with reference to the drawings. Of course, the present invention is not limited to the forms exemplified below. For example, numerical values, shapes, materials, constituent elements, arrangement positions of constituent elements, connection forms, processes, and order of processes are examples. Among the constituent elements exemplified below, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements. In each figure, substantially the same constituent elements are given the same reference numerals. Each figure is a schematic diagram and is not necessarily exact.

(Embodiment 1)
The configuration of the display device 100 according to the present embodiment will be described with reference to FIGS.

  In this embodiment, a display device 100 is described as an example of the electronic device. In the display device 100, a plurality of display panels 1 are arranged in a matrix. The display panel 1 is, for example, an organic EL panel or a liquid crystal panel. Hereinafter, a configuration example of the display device 100 using an organic EL panel as the display panel 1 will be described.

  First, a configuration example of the panel unit 10 and the display device 100 will be described with reference to FIGS. FIG. 1 is a schematic perspective view showing the configuration of the panel unit 10.

  As shown in FIG. 1, the panel unit 10 includes a small display panel 1 that displays an image, a support member 3, and an adhesive layer 2a. The adhesive layer 2 a is disposed between the display panel 1 and the support member 3. The display panel 1 is fixed to the support member 3 by the adhesive layer 2a. The panel unit 10 is a structural unit of the display device 100. The size of the panel unit 10 is substantially the same as the size of the small display panel 1.

  FIG. 2 is a schematic external view of the display device 100. The display device 100 is formed by arranging and fixing the plurality of panel units 10 in a matrix on the fixed substrate 20. Note that the arrangement of the panel units 10 may not be a matrix.

  Hereinafter, the structure of the panel unit 10 will be described.

[Display panel 1]
As shown in FIG. 1, the display panel 1 includes a display area 1a in which a plurality of pixels are formed, an extraction area 1b in which electrode wiring is drawn from the display area 1a, and a peripheral area 1c located around the display area 1a. Including. For example, the size of the display panel 1 is 5 inches.

  The display area 1a is an area where an image is displayed. In the present embodiment, the display area 1a has a square or rectangular rectangular plan view shape. On the other hand, the extraction area 1b and the peripheral area 1c are non-display areas where no image is displayed.

  The drawing area 1b is formed so as to protrude outward from the rectangular display area 1a. In the present embodiment, the extraction region 1b is formed so as to protrude from only one of the four sides of the display region 1a.

  The planar view shape of the display area 1a is not limited to a rectangular shape, and may be a polygon such as a triangle or a hexagon. In addition, the planar view shape of the extraction region 1b may be a shape as illustrated, or may be a rectangle whose longitudinal direction coincides with the direction in which the extraction region 1b extends, or a substantially trapezoidal shape.

  FIG. 3 schematically shows a cross section of the configuration of one element (pixel) formed in the display panel 1. In the present embodiment, an example of a display panel 1 using a passive matrix driving type organic EL panel will be described. However, the present invention is not limited to this. An active matrix driving type organic EL panel may be used.

  As shown in FIG. 3, the display panel 1 is formed on a first substrate 11 made of a flexible material, a first electrode wiring 12 formed on the first substrate 11, and a first electrode wiring 12. The organic EL layer 14 including the light emitting layer formed, the second electrode wiring 15 formed on the organic EL layer 14, the sealing layer 16 covering the second electrode wiring 15, and the sealing layer 16 Second substrate 17 formed.

  An organic EL element 18 is formed by the first electrode wiring 12, the organic EL layer 14, and the second electrode wiring 15. The organic EL element 18 is partitioned from the adjacent organic EL element 18 by the bank 13. The organic EL element 18 is sealed by the sealing layer 16 and the second substrate 17. Similarly to the first substrate 11, the second substrate 17 positioned on the light extraction side (arrow side in the figure) can also be formed of a flexible material.

  In the present embodiment, although not specifically illustrated, the lead-out wiring is formed in a direction parallel to the wiring direction of the first electrode wiring 12. The lead wiring is connected to the second electrode wiring 15 via a contact hole (not shown). Thereby, electrode wiring can be pulled out in one direction from the display area 1a. Note that the method of drawing the electrode wiring in one direction is not limited to this.

  The display panel 1 is a flexible organic EL panel. An organic EL element 18 is sandwiched between a pair of first substrate 11 and second substrate 17 which are flexible substrates. Further, the display panel 1 has a radius of curvature that does not cause cracks in the substrate or peeling or breakage of the electrode wiring, and is flexible.

  The display panel 1 may not be a top emission type in which light is emitted from the second substrate 17 but may be a bottom emission type in which light is emitted from the first substrate 11.

  As a method of cutting the display panel 1 into an arbitrary shape, the display panel 1 can be cut outside the pixel end in the display region 1a using, for example, a YAG third harmonic laser. However, the method is not limited to this method as long as the display panel 1 can be cut without damage to the organic EL element 18.

[Adhesive layer 2a]
Refer to FIG. 1 again.

  The adhesive layer 2 a is disposed between the display panel 1 and the support member 3. The thickness of the adhesive layer 2a is, for example, 50 μm. The adhesive layer 2 a is formed by sticking to the back surface of the display panel 1 or the support member 3.

  The adhesive layer 2 a fixes the display panel 1 to the support member 3. The pressure-sensitive adhesive layer 2a is formed of a pressure-sensitive adhesive whose adhesive force changes by applying heat energy. Specifically, the adhesive strength decreases. In the present specification, an adhesive having such characteristics is referred to as a “heat-peelable adhesive”. For example, as the heat-peelable pressure-sensitive adhesive, a heat-peelable pressure-sensitive adhesive sheet obtained by adding a foaming agent to a general main agent having adhesiveness (hereinafter referred to as “sticky main agent”) can be used. The general guaranteed temperature range of the display device is −30 ° C. to 85 ° C. In order to guarantee the performance of the display device 100 within the guaranteed temperature range, an adhesive whose adhesive strength is reduced by applying thermal energy of 100 ° C. or higher is preferable.

  From this, it is preferable that the adhesive main agent of the heat-peelable adhesive is a material having heat resistance of at least 100 ° C. For example, a silicone resin, a fluorine resin, and an ethylene / vinyl acetate copolymer resin can be used as the adhesive main agent.

  Moreover, the foaming agent added to the adhesive main agent is also preferably a material that expands at 100 ° C. or higher. When thermally expandable microspheres are used as the foaming agent, the adhesive force can be stably reduced. Thermally expansible microspheres encapsulate the nucleus with a gas-barrier thermoplastic resin such as ethylene / vinyl acetate copolymer resin, for example, with a gasified and thermally expansible substance (for example, hydrocarbon) as the nucleus. Can be obtained.

  An appropriate additive such as a cross-linking agent, a tackifier, a plasticizer, a filler, and an anti-aging agent may be blended in the heat-peelable pressure-sensitive adhesive.

  By applying thermal energy to such a heat-peelable pressure-sensitive adhesive, the resin (thermoplastic resin) of the outer shell of the thermally expandable microsphere is softened and expanded by the vaporization pressure of the nucleus. Thereby, the whole pressure-sensitive adhesive is foamed, and irregularities are formed on the surface thereof. The adhesion area with the support member 3 is reduced, and the adhesive force is reduced. As a result, the display panel 1 can be easily peeled from the support member 3.

[Supporting member 3]
The support member 3 is a base (base) that supports the display panel 1. The display panel 1 is fixed to the support member 3 by the adhesive layer 2a.

  In the present embodiment, by applying thermal energy, the adhesive strength of the adhesive layer 2 a can be reduced, and the display panel 1 can be peeled off from the support member 3 for replacement. For this reason, it is preferable to select a material for the support member 3 that has a heat resistance of at least 100 ° C. or higher and a temperature at which the adhesive strength of the adhesive layer 2a is lowered. For example, a high heat resistant resin, a ceramic material, and glass can be used as the material.

  As shown in FIG. 1, the support member 3 has a rectangular planar view shape and a substantially parallelogram-like plate-like cross-sectional shape. The support member 3 has a first surface 3a, a second surface 3b, a third surface 3c, and a fourth surface 3d.

  On the first surface 3a, the display region 1a of the display panel 1 is disposed via the adhesive layer 2a. The first surface 3 a is a flat surface and is a main surface (front surface) on the front side of the support member 3. In the present embodiment, the shape of the planar area of the first surface 3a is substantially the same as the area of the display panel 1 including the display area 1a and the peripheral area 1c.

  The second surface 3b is continuous with the first surface 3a and the fourth surface 3d. The second surface 3b is a surface on which the drawer region 1b of the display panel 1 is disposed. The second surface 3b is an inclined plane that is inclined with respect to the first surface 3a and the fourth surface 3d.

  The second surface 3b is inclined with an obtuse angle with the first surface 3a. As a result, even if the lead-out region 1b of the display panel 1 is bent at the boundary between the second surface 3b and the first surface 3a, the substrate of the display panel 1 is cracked or the electrode wiring is peeled off or damaged. Can be avoided.

  The third surface 3c faces the second surface 3b and is parallel to the second surface 3b. The shape of the support member 3 is not limited to the shape shown in FIG. 1 as long as the panel units 10 can be arranged flat without gaps.

  The display device 100 further includes a heating element that generates thermal energy. The heating element is disposed between the support member 3 and the adhesive layer 2a. Specifically, as shown in FIG. 1, a heating wire 4a is formed on the first surface 3a. The heating wire 4a can be formed by a metal wiring such as nichrome or cantal, or a resistor, for example. In order to generate heat energy more efficiently, it is better that the length of the heating wire 4a is long and its cross-sectional area is small. In addition, from the viewpoint of uniformly generating thermal energy in the first surface 3a, for example, the heating wire 4a is preferably formed on the entire first surface 3a. In addition, when using the material with good heat conductivity for the supporting member 3, the heating wire 4a may be inserted | pinched with the material.

  Both ends of the heating wire 4a are formed at edge portions of the first surface 3a on the third surface 3c side. A probe is inserted from a gap between adjacent panel units 10 and applied to both ends of the heating wire 4a to apply a voltage. A current flows through the heating wire 4a, and the temperature of the heating wire 4a rises. Thereby, thermal energy is added to the adhesive layer 2a. As a result, the adhesive strength of the adhesive layer 2 a is reduced, and the display panel 1 can be easily peeled off from the support member 3. Only an arbitrary display panel 1 in which a defect has occurred can be replaced.

[Display device 100]
The configuration of the display device 100 will be described with reference to FIG. FIG. 4 is a schematic diagram showing how the panel unit 10 is fixed to the fixed substrate 20.

  The display device 100 is formed by arranging a plurality of panel units 10 in a matrix with the panel unit 10 as a unit panel.

  The display device 100 includes a plurality of panel units 10 and a fixed substrate 20 that fixes the panel units 10. The display device 100 may further include a housing (not shown) that houses the plurality of panel units 10 fixed to the fixed substrate 20.

  The fixed substrate 20 fixes the plurality of panel units 10 constituting the display device 100. The plurality of panel units 10 are fixed to the fixed substrate 20 with screws or the like through insertion holes 21 provided in the fixed substrate 20 and screw holes provided on the back surface of the support member 3 of the panel unit 10. The fixed substrate 20 is not particularly limited, and can be formed from, for example, an aluminum plate or an aluminum chassis.

  The plurality of panel units 10 are arranged adjacent to each other and joined together in a matrix. For example, a plurality of panel units 10 can be arranged in a matrix so as to be rectangular as a whole. In this case, between the panel units 10 arranged in the drawing direction of the drawing area 1b among the plurality of panel units 10, the first surfaces 3a form one plane (same plane) with each other.

  Furthermore, between the panel units 10 adjacent in the pull-out direction, the second surface 3b of the one support member 3 and the third surface 3c of the other support member 3 overlap each other. In addition, the drawer region 1b of one support member 3 is sandwiched between the second surface 3b and the other third surface 3c. The lead-out region 1b is bent to the back side with an R equal to or greater than the radius of curvature of the display panel 1 and connected to a circuit board disposed on the back side.

  According to the display device 100 according to the present embodiment, a voltage is applied to the heating wire 4a provided on the support member 3 of the panel unit 10 in which a failure has occurred, and a current flows. Thereby, the heating wire 4a generates heat and the adhesive strength of the adhesive layer 2a is reduced. As a result, the display panel 1 can be easily peeled from the support member 3. The defective display panel 1 can be replaced with a new display panel 1. At the time of replacement, a new display panel 1 is fixed using a new adhesive layer 2a.

  Next, a modification according to this embodiment will be described with reference to FIG.

  FIG. 5 is a schematic external view of a display device 100 according to the modification. The modification differs from the present embodiment in that one support 3 ′ supports a plurality of display panels 1. Other configurations are the same as those of the display device 100 according to the present embodiment. Hereinafter, the structure of the support 3 'different from the present embodiment will be mainly described.

  The support 3 ′ is a base that supports the plurality of display panels 1 and also serves as the fixed substrate 20. A plurality of display panels 1 are fixed to the support 3 'in a matrix using the adhesive layer 2a. Thereby, the display device 100 having one large display screen can be realized. The display device 100 may further include a housing that holds the display device 100.

  As in the present embodiment, thermal energy is applied to the adhesive layer 2a to reduce its adhesive strength. As a result, the display panel 1 can be peeled off from the support 3 'and replaced. The support 3 ′ is preferably a flexible base material having at least 100 ° C. or more and heat resistance equal to or higher than a temperature that reduces the adhesive strength of the material used for the adhesive layer 2 a. For example, a flexible substrate such as polyethylene terephthalate can be used for the support 3 '. Thereby, the display device 100 has a curved surface shape and can draw an arbitrary arc.

  As shown in FIG. 5, a plurality of cuts 3e for inserting the extraction region 1b and a plurality of heating wires 4a are formed on the front side surface of the support 3 '. They are formed at positions corresponding to positions at which the respective display panels 1 are fixed. The lead-out region 1b is connected to a circuit board (not shown) provided on the back surface of the support 3 'through a notch 3e of the support 3'.

  The heating wire 4a is formed of a metal wiring such as nichrome or cantal, or a resistor, for example. In order to generate thermal energy more efficiently, it is preferable that the length of the heating wire 4a is long and the cross-sectional area thereof is small. Further, from the viewpoint of uniformly generating thermal energy in the region where the display panel 1 is fixed, for example, the heating wire 4a is preferably formed in the entire region.

  Both ends of the heating wire 4a are formed at positions corresponding to edge portions on the side opposite to the drawing region 1b of the display panel 1. For example, using a voltage source 30 as shown, a probe is applied to both ends of the voltage source from outside to apply a voltage. A current flows through the heating wire 4a, and the temperature of the heating wire 4a rises. Thereby, thermal energy is added to the adhesive layer 2a. As a result, the adhesive strength of the adhesive layer 2a is reduced, and the display panel 1 can be easily peeled from the support 3 '. Only an arbitrary display panel 1 in which a defect has occurred can be replaced.

  According to the display device 100 according to this modification, a voltage is applied to the heating wire 4a corresponding to the display panel 1 at the location where the defect has occurred, and a current flows, whereby the heating wire 4a generates heat. The adhesive strength of the adhesive layer 2a is reduced, and the display panel 1 can be easily peeled from the support 3 '. The defective display panel 1 can be replaced with a new display panel 1. At the time of replacement, a new display panel 1 is fixed using a new adhesive layer 2a.

(Embodiment 2)
The configuration of the panel unit 10 according to the present embodiment will be described with reference to FIG.

  The panel unit 10 according to the present embodiment is different from the panel unit 10 according to the first embodiment in that a coil 4b is disposed on the front side surface of the support member 3 instead of a heating wire as a heating element. That is, the configuration of the panel unit 10 according to the present embodiment is the same as the configuration of the panel unit 10 according to the first embodiment except for the support member 3. Hereinafter, the structure of the support member 3 different from that of the first embodiment will be mainly described.

[Supporting member 3]
FIG. 6 is a schematic perspective view showing the configuration of the panel unit 10 according to the present embodiment.

  Support member 3 in the present embodiment is formed of the same material as in the first embodiment and has the same shape. The support member 3 is not limited to this as long as the panel units can be arranged flat without gaps.

  On the front side surface of the support member 3, a coil 4b is formed as a heating element. The coil 4b is made of a metal such as copper, for example. In order to generate thermal energy more efficiently, the capacity and inductance of the coil 4b may be adjusted. The magnitude of the thermal energy is controlled by, for example, the number of turns, the diameter, and the shape of the coil 4b. From the viewpoint of uniformly generating thermal energy throughout the adhesive layer 2a, for example, the coil 4b as a current source may be formed on a part of the front side surface, and a heating wire may be formed around the coil 4b.

  A coil (primary coil) having an iron core is brought closer from the surface side of the panel unit 10 where the defect has occurred. A magnetic field is generated in the coil 4b by the primary coil. A current flows through the coil 4b by electromagnetic induction. As a result, the temperature of the coil 4b increases. Thermal energy is applied to the adhesive layer 2a, and the adhesive strength of the adhesive layer 2a decreases.

  According to panel unit 10 according to the present embodiment, display panel 1 can be easily peeled off from support member 3. Any display panel 1 in which a defect has occurred can be replaced with a new display panel 1.

  Next, a modification according to this embodiment will be described with reference to FIG.

  FIG. 7 is a schematic external view of a display device 100 according to the modification. This modification is different from the present embodiment in that one support 3 ′ supports a plurality of display panels 1. Other configurations are the same as those of the display device 100 according to the present embodiment. Hereinafter, the structure of the support 3 'different from the present embodiment will be mainly described.

  The support 3 ′ is a base that supports the plurality of display panels 1 and also serves as the fixed substrate 20. A plurality of display panels 1 are fixed to the support 3 'in a matrix using a plurality of adhesive layers 2a. Thereby, the display device 100 having one large display screen can be realized. The display device 100 may further include a housing that holds the display device 100.

  The support 3 'according to this modification is made of the same material as the support 3' according to the modification of the first embodiment, and has the same shape. Therefore, the display device 100 according to this modification has a curved surface shape and can draw an arbitrary arc.

  On the front side surface of the support 3 ′, a plurality of cuts 3 e for inserting the extraction region 1 b and a plurality of coils 4 b are formed. They are formed at positions corresponding to positions at which the respective display panels 1 are fixed. The lead-out region 1b is connected to a circuit board (not shown) provided on the back surface of the support 3 'through a notch 3e of the support 3'.

  The coil 4b is made of a metal such as copper, for example. In order to generate heat energy more efficiently, the capacity and inductance of the coil 4b may be adjusted. The magnitude of the thermal energy is controlled by, for example, the number of turns, the diameter, and the shape of the coil 4b. From the viewpoint of uniformly generating thermal energy throughout the adhesive layer 2a, for example, the coil 4b may be formed in a part of each region corresponding to the display panel 1, and a heating wire may be formed around the coil 4b.

  The primary coil is brought closer from the surface side of the display panel 1 where the defect has occurred. Then, a current flows through the coil 4b due to electromagnetic induction. As a result, the temperature of the coil 4b increases. Thermal energy is applied to the adhesive layer 2a, and the adhesive strength of the adhesive layer 2a decreases.

  According to the display device 100 according to this modification, the display panel 1 can be easily peeled off from the support 3 ′. Only an arbitrary display panel 1 in which a defect has occurred can be replaced with a new display panel 1.

(Embodiment 3)
The configuration of the panel unit 10 according to the present embodiment will be described with reference to FIG.

  The panel unit 10 according to the present embodiment is different from the panel unit 10 according to the first or second embodiment in that the panel unit 10 according to the present embodiment has an adhesive layer 2b whose adhesive strength is reduced by light energy. The configuration of the panel unit 10 according to the present embodiment is the same as the configuration of the panel unit 10 according to the first or second embodiment except for the support member 3 and the adhesive layer 2a. Hereinafter, a description will be given focusing on differences from the first embodiment.

[Adhesive layer 2b]
FIG. 8 is a schematic perspective view showing the configuration of the panel unit 10 according to the present embodiment.

  The adhesive layer 2b fixes the display panel 1 to the support member 3 like the adhesive layer 2a. The pressure-sensitive adhesive layer 2b is formed of a pressure-sensitive adhesive whose adhesive force changes by applying light energy. Specifically, the adhesive strength is reduced by applying light energy from ultraviolet rays. In the present specification, an adhesive having such characteristics is referred to as an “ultraviolet peeling adhesive”. For example, an ultraviolet peelable pressure-sensitive adhesive sheet in which a photopolymerizable resin is added to a general adhesive main agent can be used as the ultraviolet peelable adhesive.

  The adhesive main agent of the ultraviolet peeling adhesive is obtained, for example, by adding a photopolymerizable resin such as trimethylolpropane acrylate and oligoester acrylate to an acrylic resin. The adhesive layer 2b may contain appropriate additives such as a photoinitiator, a gas generating agent, a tackifier, a plasticizer, and an anti-aging agent.

  When such an ultraviolet peelable adhesive is irradiated with ultraviolet rays, the adhesive main agent is constrained by the cross-linked structure of the photopolymerizable resin, resulting in an increase in elastic modulus and volume shrinkage of the adhesive main agent. As a result, the adhesive strength of the adhesive layer 2b is reduced. Thereby, the display panel 1 can be easily peeled from the support member 3. The degree to which the adhesive strength of the adhesive layer 2b is reduced by ultraviolet irradiation can be controlled by, for example, the type, composition ratio, and ultraviolet irradiation amount of the photopolymerizable resin.

  In order to irradiate the adhesive layer 2b with ultraviolet rays from the outside, a transparent flexible substrate that transmits ultraviolet rays can be used for the first substrate 11 and the second substrate 17 of the display panel 1.

[Supporting member 3]
The support member 3 can be formed using, for example, a metal such as aluminum, a ceramic material such as alumina, or glass. The support member 3 is not limited to this as long as the panel units can be arranged flat without gaps.

According to the display device 100 according to the present embodiment, the adhesive strength of the adhesive layer 2b is reduced by irradiating the panel unit 10 in which a defect has occurred with ultraviolet rays. As a result, the display panel 1 can be easily peeled from the support member 3. The defective display panel 1 can be replaced with a new display panel 1. A new display panel 1 is fixed using a new adhesive layer 2b at the time of replacement. Next, a modification according to this embodiment will be described with reference to FIG.

  FIG. 9 is a schematic external view of a display device 100 according to the modification. The modification differs from the present embodiment in that one support 3 ′ supports a plurality of panel units 10. Other configurations are the same as those of the display device 100 according to the present embodiment. Hereinafter, the structure of the support 3 'will be mainly described.

  The support 3 ′ in this modification is a base that supports the plurality of display panels 1, and also serves as the fixed substrate 20. A plurality of display panels 1 are fixed to the support 3 'in a matrix using a plurality of adhesive layers 2b. Thereby, the display device 100 having one large display screen can be realized. The display device 100 may further include a housing that holds the display device 100.

  In this modification, the display panel 1 can be peeled off from the support 3 ′ and replaced by reducing the adhesive strength of the adhesive layer 2 b by applying light energy. The support 3 'is preferably a flexible substrate having heat resistance of at least 100 ° C or higher. For example, a flexible substrate such as polyethylene terephthalate can be used for the support 3 '. Therefore, the display device 100 according to this modification has a curved surface shape and can draw an arbitrary arc.

  A plurality of cuts 3e for inserting the drawing region 1b are formed on the front side surface of the support 3 '. They are formed at positions corresponding to positions at which the respective display panels 1 are fixed. The lead-out region 1b is connected to a circuit board (not shown) provided on the back surface of the support 3 'through a notch 3e of the support 3'.

  By irradiating the defective display panel 1 with ultraviolet rays, the adhesive strength of the adhesive layer 2b is reduced, and the display panel 1 can be easily peeled from the support 3 '.

  According to the display device 100 according to this modification, the display panel 1 can be easily peeled off from the support 3 ′. Only an arbitrary display panel 1 in which a defect has occurred can be replaced with a new display panel 1. At the time of replacement, a new display panel 1 is fixed using a new adhesive layer 2b.

(Other variations)
The electronic device according to one embodiment of the present invention is not limited to the display device described above. For example, the electronic device may be a lighting device in which a plurality of LED panels are arranged. The LED panel includes, for example, a plurality of white light emitting elements.

  The LED panel is fixed to the support member 3 via the adhesive layer 2a or 2b, and they are arranged in a matrix on the fixed substrate 20. Alternatively, as shown in FIG. 5, a plurality of LED panels are arranged on one support 3 '. Thereby, the illuminating device with a large area is realizable.

  As described above, when heat or light energy is applied to the adhesive layer, the adhesive force of the adhesive layer is reduced, and the LED panel can be easily peeled from the support member 3.

  According to another modification, the LED panel can be easily peeled from the support member 3. Only any LED panel that has failed can be replaced with a new LED panel. At the time of replacement, a new LED panel is fixed using a new adhesive.

  The technology according to the present invention is not limited to display devices and lighting devices, and can be widely used.

  The electronic device according to one embodiment of the present invention can be used as a large display device configured by arranging a plurality of small panel units. Further, the present invention can be applied to a lighting device configured by arranging a plurality of LED panels.

DESCRIPTION OF SYMBOLS 1: Display panel 1a: Display area 1b: Pull-out area | region 1c: Peripheral area | region 2a: Adhesion layer 2b: Adhesion layer 3: Support member 3 ': Support body 3a: 1st surface 3b: 2nd surface 3c: 3rd Surface 3d: Fourth surface 3e: Cut 4a: Heating wire 4b: Coil 10: Panel unit 11: First substrate 12: First electrode wiring 13: Bank 14: Organic EL layer 15: Second electrode wiring 16 : Sealing layer 17: Second substrate 18: Organic EL element 20: Fixed substrate 21: Insertion hole 30: Voltage source 100: Display device

Claims (16)

An electronic device in which a plurality of panels having at least one light emitting element are arranged,
A support that supports the plurality of panels;
A plurality of adhesive layers disposed between the plurality of panels and the support and fixing the plurality of panels to the support; a plurality of adhesive layers whose adhesive strength decreases when energy is applied; An electronic device comprising:   When the energy is applied to at least one adhesive layer among the plurality of adhesive layers, at least one of the plurality of panels corresponding to the at least one adhesive layer may be peeled from the support. Item 2. The electronic device according to Item 1.   The electronic device according to claim 2, wherein the energy is thermal energy.   The electronic device according to claim 3, wherein the plurality of adhesive layers are formed of a material that reduces the adhesive force when heated to 100 ° C. or higher.   The electronic device according to claim 4, wherein the material whose adhesive force is reduced is a heat-peelable adhesive containing an adhesive main agent and a foaming agent.   The electronic device according to claim 3, further comprising a plurality of heating elements.   The electronic device according to claim 6, wherein the plurality of heating elements are disposed between the support and the plurality of adhesive layers.   8. The electronic device according to claim 6, wherein each of the plurality of heating elements is formed of a heating wire or a coil, and generates the thermal energy by a current flowing through the heating wire or the coil.   The electronic device according to claim 8, wherein each of the plurality of heating elements is a heating wire formed of a metal wiring or a resistor.   The electronic device according to claim 9, wherein both ends of the heating wire are disposed in a region of the support body corresponding to a region where a gap between adjacent panels is located.   The electronic device according to claim 1, wherein the energy is light energy.   The electronic device according to claim 11, wherein the plurality of adhesive layers are formed of a material whose adhesive force is reduced by ultraviolet rays.   The electronic device according to claim 12, wherein the material whose adhesive force is reduced is an ultraviolet peeling adhesive including an adhesive main agent and a photopolymerizable resin.   The electronic device according to claim 1, wherein the support includes a plurality of support members respectively corresponding to the plurality of panels.   The electronic device according to claim 1, wherein each of the plurality of panels is an organic EL panel.   The electronic device according to claim 15, wherein the organic EL panel is a flexible panel including a substrate formed of a flexible base material.

Images