JP6671420B2 - Display device and method of manufacturing display device - Google Patents

Description

  The present invention relates to a display device and a method for manufacturing the display device.

  2. Description of the Related Art In recent years, a display panel formed using a resin film or a thin glass plate as a base material has been used for a flat display device such as an organic EL display device and a liquid crystal display device in order to meet a demand for thinning. . Thin display panels using an ultra-thin material such as a resin film as a base material can be applied to the surface of any support in many display devices to provide shape retention or mechanical strength suitable for the application. It is pasted. For example, Patent Document 1 discloses a digital signage having an image display panel attached to a glass plate. In Patent Literature 1, an image display panel is attached to a window glass via a layer containing a photocurable resin.

JP-A-2006-97650

  It is extremely difficult to remove a display panel attached to a support using an adhesive made of a photo-curable resin, a thermosetting resin, or the like as in Patent Literature 1. Even if it can be removed, it is considered that it is difficult to reuse the display panel and the support because the residue of the adhesive and the debris of the display panel or the support remain on the attaching surface. Can be Further, with the attaching method disclosed in Patent Document 1, it is difficult to accurately attach a display panel to a predetermined position on a glass plate. In addition, since the display panel is attached using an adhesive such as a photocurable resin, it is difficult to relocate the display panel once disposed at an inappropriate position to a proper position.

  Therefore, the present invention provides a display device in which, even when a defect or the like occurs in some of the components of the display device, other components can be easily reused in the display device or another display device. The purpose is to: Another object of the present invention is to provide a method of manufacturing a display device, in which such components can be easily reused, and a display device having a display panel at an appropriate position can be easily manufactured. I do.

  A display device according to an embodiment of the present invention includes a display panel that displays an image by controlling emission or transmission of light, a support having a surface on which the display panel is mounted, and the surface of the support. And a holding member that holds the display panel at a predetermined position on the surface by engaging with an edge of the display panel, wherein the display panel supports the opposite surface of the display surface. The holding member is formed of a material that transmits light and is formed of a material that transmits light, and a plate-shaped front portion that covers the display surface, and a first surface that is directed to the display surface in the front portion. And a frame formed by a rod-shaped member provided along the edge of the front portion, wherein the front portion is opposite to the first surface or the first surface. On the second side, the light propagation And a first functional layer having a predetermined function.

  In a method for manufacturing a display device according to another embodiment of the present invention, a display panel is formed by forming a plurality of display elements on a substrate, and a support having a surface on which the display panel is to be mounted is provided. A plate-shaped front portion, and a frame portion formed by a bar-shaped member protruding from a first surface, which is a surface other than a side surface of the front portion, and provided along an edge of the front portion. Preparing a holding member having the first surface facing the support, bonding the holding member to the surface of the support, and covering the display surface of the display panel with the front surface. Engaging the inner wall of the frame and the edge of the display panel, mounting the display panel on the surface of the support with the opposite surface of the display surface facing the support, In preparing the holding member, light is transmitted. Forming the front surface using a material, and providing a first functional layer having a predetermined function with respect to light propagation on the first surface or the second surface opposite to the first surface of the front surface. Contains.

  According to an embodiment of the present invention, even when a part of a component of a display device has a defect, other components can be easily reused in the display device or another display device. Further, according to another embodiment of the present invention, it is possible to easily manufacture a display device in which components can be easily reused and a display panel is provided at an appropriate position.

It is a front view showing an example of the display of Embodiment 1 of the present invention. It is sectional drawing in the IB-IB line | wire of FIG. 1A. FIG. 1B is a rear view of an example of a holding member in the display device illustrated in FIG. 1A. FIG. 2B is a plan view of the holding member illustrated in FIG. 2A. FIG. 2B is a partially enlarged view of another example of the holding member illustrated in FIG. 2A. FIG. 2B is a partially enlarged view of another example of the holding member illustrated in FIG. 2A. FIG. 4 is a cross-sectional view illustrating another example of the display device according to the first embodiment of the present invention. FIG. 9 is a front view showing still another example of the display device according to the first embodiment of the present invention. It is sectional drawing in the VB-VB line of FIG. 5A. FIG. 5B is a rear view of an example of a holding member in the display device illustrated in FIG. 5A. It is sectional drawing in the VIB-VIB line of FIG. 6A. FIG. 6 is a cross-sectional view illustrating an example of a display device according to a second embodiment of the present invention. FIG. 8 is a rear view illustrating an example of a holding member in the display device illustrated in FIG. 7. FIG. 8B is a plan view of the holding member illustrated in FIG. 8A. FIG. 2 is a cross-sectional view illustrating an example of a display panel used in the display device according to the embodiment of the present invention. It is a figure showing an example of the manufacturing method of the display of Embodiment 3 of the present invention. FIG. 2C is a diagram illustrating an example of a method of forming the first and second functional layers illustrated in FIG. 2B. FIG. 2C is a diagram illustrating an example of a method of forming the holding member illustrated in FIG. 2B. FIG. 9B is a diagram illustrating an example of a method of forming the holding member illustrated in FIG. 8B. FIG. 11 is a diagram illustrating an example of mounting a display panel in the manufacturing method illustrated in FIG. 10. FIG. 11 is a diagram illustrating an example of mounting a display panel in the manufacturing method illustrated in FIG. 10. It is a figure showing other examples of a manufacturing method of a display of Embodiment 3 of the present invention. FIG. 14 is a diagram illustrating an example of engagement between a holding member and a display panel in the manufacturing method illustrated in FIG. 13.

  In a display device having a display panel fixed to a surface of a support, the present inventor has proposed a display panel or a support having no defect, or a defect other than the above, when a defect occurs in some components. Intensive studies have been made on a structure that enables the reuse of component parts without any problem. Then, by using a structure in which the display panel is fixed to the support via a member capable of holding the display panel at a predetermined position of the support, the display panel can be appropriately fixed to the surface of the support, Further, they have found that the display panel can be easily removed from the support as needed. That is, the display panel is engaged with a holding member formed to hold the display panel on the support without being bonded to the support, and the holding member is bonded to the support. Since the movement of the display panel relative to the support is limited by the holding member, the display panel can be fixed at a predetermined position on the surface of the support. When the display panel is removed from the support, the display panel can be easily removed from the support by simply separating the holding member and the display panel that are not bonded to each other but are engaged with each other.

  Furthermore, the present inventor has newly found that by providing a portion for covering the display surface of the display panel in such a holding member, it is possible to reuse additional components without defects. That is, a polarizing plate or an anti-reflection layer which is provided on the display surface of the display panel and performs a specific function is conventionally discarded together with the display panel when a defect occurs in the display panel. Polarizing plates have a much simpler structure than display panels, and there is no risk of deterioration in electrical characteristics. Is considered to have been discarded due to defects. On the other hand, when the holding member has a portion that covers the display surface of the display panel, a layer that performs a specific function such as a polarizing plate can be provided in that portion. When a defect occurs in the display panel, the display panel and the holding member can be separated as described above, and the functional layer including the polarizing plate and the like can be reused together with the holding member for another display panel. it can. As described above, the present inventor provides a holding member for holding a display panel on a support, by providing a specific functional layer that can be provided on the display panel in a conventional display device, for example, when the display panel needs to be replaced. In addition, they have newly found that such a functional layer can be reused in addition to the support.

  Hereinafter, a display device according to an embodiment of the present invention and a method for manufacturing the display device will be described with reference to the drawings. It should be noted that the materials, shapes, relative positional relationships, and the like of each component in the embodiments described below are merely examples. The display device and the method for manufacturing the display device of the present invention are not construed as being limited to these.

[Embodiment 1]
1A is a front view of the display device 1 according to the first embodiment, and FIG. 1B is a cross-sectional view of the display device 1 taken along line IB-IB in FIG. 1A. The display device 1 includes a display panel 3 that displays an image by controlling the emission or transmission of light, a support 5 having a surface 5a on which the display panel 3 is mounted, and a display device 1 adhered to the surface 5a of the support 5. And a holding member 4 that holds the display panel 3 at a predetermined position on the surface 5a of the support 5 by engaging with the edge of the display panel 3. The display panel 3 has the surface 3 b opposite to the display surface 3 a facing the support 5. The display device 1 further includes a wiring 9 connected to the display panel 3. Note that, in FIG. 1B and each cross-sectional view referred to in the following description, each component is appropriately emphasized in the thickness direction of the display panel 3 for easy viewing.

  2A shows a rear view of the holding member 4 shown in FIGS. 1A and 1B (a rear view when the surface shown in FIG. 1A is the front of the holding member 4), and FIG. The figure (the figure which looked at the holding member 4 from above in FIG. 2A) is shown. The holding member 4 is formed of a material that transmits light, and has a plate-shaped front portion 41 that covers the display surface 3a (see FIG. 1B) of the display panel 3; And a frame portion 42 composed of a rod-shaped member provided along the edge of the front surface portion 41 so as to protrude from the first surface 41 a facing the first surface 41 a. The front surface 41 includes a first functional layer 61 having a predetermined function with respect to light propagation on the first surface 41a or the second surface 41b opposite to the first surface 41a. In the examples of FIGS. 1A, 1B, 2A and 2B, the holding member 4 includes a first functional layer 61 on the first surface 41a and a second functional layer 62 having a predetermined function with respect to light propagation. It is provided on two surfaces 41b. The second functional layer 62 preferably has a function different from the function of the first functional layer 61. The second functional layer 62 may not be provided. In that case, the first functional layer 61 may be provided on either the first surface 41a or the second surface 41b.

  Here, the “function” of “having a predetermined function with respect to light propagation” may include various functions. For example, a function of a polarizing plate that transmits only polarized light (linearly polarized light, circularly polarized light or elliptically polarized light) having a specific regularity with respect to the vibration direction of an electric field and a magnetic field, an antireflection function that suppresses light reflection, and light of a specific wavelength A selective reflection function of reflecting light of a specific wavelength, a selective transmission function of transmitting only light of a specific wavelength, and the like. The first functional layer 61 and the second functional layer 62 (and the third functional layer described below) may have any of the functions illustrated herein, and are illustrated herein for light propagation. It may have any function other than the above. In addition, each functional layer may have either a function directly acting on light propagation (optical function) or a function acting indirectly on light propagation.

  Here, the "direct" of the "function directly acting on the propagation of light" refers to the function of the above-described polarizing plate for the propagation of light, and each of antireflection, selective reflection, selective absorption, and selective transmission. Like a function, it means an aspect of an action which causes transmission, reflection or absorption of light by itself. In addition, “indirect” of “the function that acts indirectly on light propagation” means a mode of action through suppression or enhancement of a substance that can act on light propagation. For example, the “function that acts indirectly on the propagation of light” includes a function of suppressing adhesion or generation of dust, dirt, scratches, or the like that can unintentionally cause light reflection or absorption on the front surface 41 of the holding member 4. And the like. Therefore, such a function may be an antistatic function, an antifouling function, a surface protection function, and the like, and may be a function other than these that acts indirectly on the propagation of light.

  Examples of the display panel 3 include an organic EL display panel and a liquid crystal display panel. However, the display panel 3 is not limited to these. The display panel 3 illustrated in FIGS. 1A and 1B has a rectangular shape on the display surface 3a, and has a side surface and a display on a lower side and two shorter sides of two long sides of the rectangular shape. It is in contact with the holding member 4 at the surface 3a. Therefore, the display panel 3 holds the movement along the long side direction and the movement in the direction of the arrow Y drawn from the upper side to the lower side in parallel with the short side direction of the display panel 3 in FIG. 1A. Limited by member 4. The holding member 4 is bonded to the support 5 using an adhesive 8. When the display device 1 is arranged so that the lower side of the display panel 3 in FIG. 1A is lower than the upper side in the vertical direction, the display panel 3 moves in the direction opposite to the direction of the arrow Y. Can also be limited by gravity. As a result, the display panel 3 can be fixed at a predetermined position on the surface 5 a of the support 5.

  On the other hand, the display panel 3 itself is not bonded to the support 5. Accordingly, the display panel 3 can be held on the support 5 during normal use of the display device 1, and the display panel 3 can be easily removed from the support 5 when necessary. For example, the display panel 3 can be removed from the support 5 by moving the display panel 3 to the outside of the holding member 4 in the direction opposite to the direction of the arrow Y shown in FIG. 1A. Therefore, when a defect occurs in any of the support 5 and the display panel 3, the support 5 or the display panel 3 having no defect can be reused.

  Further, in the present embodiment, the holding member 4 includes at least the first functional layer 61 on the first surface 41a or the second surface 41b of the front surface portion 41. 1A and 1B, the first surface 41a is provided with the first functional layer 61, and the second surface 41b is provided with the second functional layer 62. The first functional layer 61 and the second functional layer 62 can have various functions as described above. For example, the first functional layer 61 or the second functional layer 62 may be configured by an antireflection layer configured to suppress reflection of light or a polarizing plate. For example, in the conventional liquid crystal display panel, a linear polarizing plate provided on a counter substrate disposed to face a TFT (thin film transistor) substrate on which a driving transistor is formed is provided on the holding member 4 as the first functional layer 61. Good. Alternatively, a circularly polarizing plate provided on the light emitting surface of the organic EL display panel may be provided as the first functional layer 61. By doing so, the arrangement of at least one polarizing plate on the display panel 3 can be omitted. When a defect occurs in the display panel 3, the linear polarizing plate or the like provided as the first functional layer 61 can be reused together with the holding member 4 and the second functional layer 62 for another display panel or the like. .

  When the first functional layer 61 is formed of a polarizing plate, the second functional layer 62 may be an anti-reflection layer configured to suppress light reflection. For example, an anti-reflection film or the like formed on the display surface of a conventional organic EL display panel or the like and preventing a decrease in visibility due to light reflection may be provided on the holding member 4 as the second functional layer 62. By doing so, the formation of the antireflection film on the display panel 3 can be omitted. When a defect occurs in the display panel 3, the anti-reflection film provided as the second functional layer 62 can be reused for another display panel together with the holding member 4 and the first functional layer 61. . As described above, only the first functional layer 61 may be provided on the holding member 4. In that case, a first functional layer 61 constituted by an anti-reflection layer may be provided on the second surface 41b of the front part 41.

  When a polarizing plate is provided as the first functional layer 61 or the second functional layer 62, a commercially available polarizing plate may be adhered to the front surface 41. For example, a linear polarizing plate having a structure in which a layer mainly composed of polyvinyl alcohol on which an iodine compound is adsorbed and oriented is sandwiched between two triacetyl cellulose films is adhered to the front part 41. Further, a circularly polarizing plate in which a ４ retardation plate made of polycarbonate or the like is laminated on such a linearly polarizing plate may be bonded to the front surface portion 41. The polarizing plate provided as the first functional layer 61 or the second functional layer 62 is preferably provided on the first surface 41 a of the holding member 4.

  When the first functional layer 61 or the second functional layer 62 is an anti-reflection layer, such an anti-reflection layer has, for example, a refractive index n lower than a refractive index of a material forming the front surface portion 41 of the holding member 4. It is formed using a dielectric material or the like. Each of the functional layers 61 and 62 is formed to have such a thickness that reflected lights on the front and back surfaces of the functional layers 61 and 62 weaken each other by interference. Preferably, as a thickness d of a layer formed of a dielectric material or the like, an optical path length L (= n × d) of light in a visible light region (for example, light having a wavelength λ) of the layer is (１ ／). × λ is selected as the thickness. When the first function layer 61 and the second function layer 62 are antireflection layers, they may have a multilayer structure including a plurality of layers formed of a dielectric material or the like. By doing so, reflection of light of a wide range of wavelengths can be efficiently suppressed. The antireflection layer provided as the first functional layer 61 or the second functional layer 62 is preferably provided on the second surface 41b of the holding member 4.

When the first functional layer 61 or the second functional layer 62 has the above-described selective reflection function, for example, a function of reflecting infrared rays, each functional layer is, for example, a multilayer in which materials having mutually different refractive indexes are alternately laminated. It has a structure. Layers formed of materials having different refractive indices, for example, titanium oxide (TiO ₂ ) and silicon dioxide (SiO ₂ ), or zinc sulfide (ZnS) and magnesium fluoride (MgF ₂ ), respectively, It is formed with a thickness such that reflected lights in the infrared region at the interface reinforce each other. By reflecting the infrared rays, it is possible to suppress a rise in the temperature of the display panel 3, and therefore, it is possible to alleviate the deterioration of the characteristics and quality of the display panel 3. The film provided as the first functional layer 61 or the second functional layer 62 and having a function of selectively reflecting infrared rays is preferably provided on the second surface 41 b of the holding member 4.

  When the first functional layer 61 or the second functional layer 62 has an ultraviolet absorbing function as the selective absorbing function described above, each functional layer is made of a resin to which an ultraviolet absorbing agent is added, such as a polycarbonate resin or an acrylic resin. Formed by Examples of the ultraviolet absorber include a besozophenone derivative, a salicylate derivative, a triazole derivative, and an acrylic derivative. By absorbing the ultraviolet rays, when the display panel 3 is an organic EL display panel, it is possible to reduce the stress on the organic elements due to the ultraviolet rays. Further, the first functional layer 61 or the second functional layer 62 having the selective transmission function described above can be formed by combining the layer having the selective reflection function and the layer having the selective absorption function.

  The shape and material of the support 5 are not particularly limited as long as the support 5 can appropriately support the display panel 3. The support 5 can be formed using any material such as glass, metal, and synthetic resin. Further, the support 5 may be a glass plate used for a housing of various devices, a window of a house, a show window, a display case, or the like. The support 5 may also be a windshield of a motor vehicle, in which case the surface 5a is preferably the surface of the windshield facing the passenger compartment.

  The wiring 9 is provided in the display device 1 to connect a driver (not shown) for supplying a drive signal to the display panel 3 and the display panel 3. The wiring 9 is connected to a connection pad (not shown) provided on the display surface 3a at one end of the wiring 9 using an anisotropic conductive film (ACF) or the like. As shown in FIGS. 1A and 1B, the connection between the wiring 9 and the display panel 3 is housed in a space surrounded by the holding member 4 and the support 3, and is covered by the front surface 41 of the holding member 4. ing. The wiring 9 is drawn out of the holding member 4 through a discontinuous portion in the frame portion 42 of the holding member 4. The wiring 9 is exemplified by a flexible wiring board (FPC), but any wiring member may be used for the wiring 9.

  The adhesive 8 is not particularly limited as long as it has an adhesive strength capable of stably joining the holding member 4 to the support 5. Any epoxy adhesive or acrylic adhesive can be used for the adhesive 8. For example, an arbitrary adhesive such as acrylic, silicone, or urethane, which is called an optical transparent adhesive (OCA: Optical Clear Adhesive) or an optical transparent resin (OCR: Optical Clear Resin), is used for the adhesive 8. obtain.

  As shown in FIGS. 1A, 1B, 2A and 2B, the holding member 4 has a generally rectangular front shape, and has a front portion 41 having a first surface 41a and a second surface 41b, and a front surface. And a frame portion 42 protruding from the first surface 41a at an edge of the portion 41. In the example of FIGS. 2A and 2B, the front surface portion 41 and the frame portion 42 are formed integrally. However, the front part 41 and the frame part 42 may be formed separately and then connected (see FIG. 11B). In the example shown in FIG. 2A and the like, a frame portion 42 is formed along both short sides and a lower side, which is one of the long sides, of the substantially rectangular front portion 41. The frame part 42 has a discontinuous part at a part of the edge of the front part 41 (the upper side of the front part 41 in FIG. 2). As a result, as shown in FIG. 2B, a notch 42a is formed on a side surface (illustrated in front in FIG. 2B) formed by the frame portion 42 in the holding member 4. The notch 42a is formed in a size that allows the display panel 3 to be inserted. By providing the cutout 42a having such a size, the display panel 3 can be removed from the support 5 as needed while the holding member 4 is adhered to the support 5.

  The first surface 41a of the front portion 41 of the holding member 4 abuts on the display surface 3a of the display panel 3 immediately inside the frame portion. Further, on the first surface 41a, the inside of the contact portion 411 with the display panel 3 is further recessed toward the second surface 41b than the contact portion 411, and the recess 412 is provided with the first functional layer 61. I have. It is preferable that the display surface 3a of the display panel 3 is in contact with a first functional layer 61 or the like that can be provided on the first surface 41a of the holding member 4. This is because, if there is a gap between the two, external light is reflected, and the transmittance of light from the display panel 3 is reduced, thereby lowering visibility. Therefore, the depth of the concave portion 412 is selected so that the surface of the first functional layer 61 facing the display panel 3 and the contact portion 411 on the first surface 41a of the holding member 4 are substantially flush. Is preferred. If there is a gap between the display surface 3a of the display panel 3 and the first functional layer 61 or the like that can be provided on the first surface 41a, the gap is substantially the same as the refractive index of the first functional layer 61. It is preferably filled with a filler having a ratio.

  FIGS. 3A and 3B show a modification of the shape of the inner wall of the frame portion 42 of the holding member 4 exemplified in FIGS. 2A and 2B. 3A and 3B are enlarged views of a portion corresponding to a portion surrounded by a chain line in FIG. 2B. In the example shown in FIG. 3A, a groove 4 a is formed on the inner wall of the frame portion 42. The edge of the display panel 3 is inserted into the groove 4a, and the display panel 3 is in contact with the holding member 4 even on the opposite surface 3b of the display surface at the edge. Therefore, whether the contact between the display panel 3 and the first functional layer 61 provided on the first surface 41 a of the holding member 4 is affected by the variation in the thickness of the adhesive 8 (see FIG. 1B). Can be avoided.

  However, as shown in FIG. 3B, the holding member 4 does not have to have the groove 4a as shown in FIG. 3A on the inner wall of the frame portion 42. The contact portion 411 with the display panel 3 as shown in FIG. 2B may not be provided. In other words, the first surface 41a does not necessarily have to have the concave portion 412 shown in FIG. 2B. In the example shown in FIG. 3B, the movement of the display panel 3 away from the support 5 (see FIG. 1B) can be limited by contact with the first functional layer 61 or friction with the inner wall of the frame portion 42. .

  At least a portion of the front surface portion 41 of the holding member 4 that covers an image displayed on the display panel 3 is formed using a material that transmits light. For example, the front portion 41 is formed using glass or flexible transparent silicone rubber. By using the transparent silicone rubber, even if the surface 5a of the support 5 is a curved surface like the surface of a windshield of an automobile, the holding member 4 can be attached to the support 5 without causing excessive stress on the front portion 41. Can be adhered to. Except for the portion of the display panel 3 that covers the image, the holding member 4 can be formed of any material. For example, a synthetic resin such as an epoxy resin or a general-purpose plastic, a natural resin such as a natural rubber, a rubber sponge, or the like may be used as a material of the holding member 4. However, the holding member 4 is preferably formed of a material having flexibility and elasticity as a whole, not only the front surface portion 41 described above. The holding member 4 is made of a material that transmits light, such as the above-described transparent silicone rubber, acrylic resin, transparent PC (polycarbonate) resin, transparent PET (polyethylene terephthalate) resin, as well as the front part 41 described above. Alternatively, it may be formed using a transparent MS (polymethacrylstyrene) resin or the like. By doing so, it is possible to make the display device 1 less noticeable to a viewer.

  FIG. 4 shows another example of the display device 1 of the present embodiment. As shown in FIG. 4, a polarizing plate 51 may be provided on the surface 5 a of the support 5 separately from a polarizing plate that can be provided as the first functional layer 61 provided on the holding member 4. By providing, for example, a linear polarizing plate as the polarizing plate 51 on the surface 5a of the support 5, when the display panel 3 is a liquid crystal display panel, a linear polarizing plate that can be provided on a TFT substrate in a conventional liquid crystal display panel is omitted. can do. In the example of FIG. 4, when a linear polarizer is provided as the first functional layer 61, the polarization axis of the linear polarizer provided as the first functional layer 61 and the polarization axis of the linear polarizer provided as the polarizer 51. May be orthogonal or parallel. Further, the polarization axes of these linear polarizing plates may be inclined by 45 degrees with respect to each other. When the polarizing plate 51 is provided on the support 5, when a defect occurs in the display panel 3, the polarizing plate 51 can be reused for another display panel together with the holding member 4 and the support 5. it can. In addition to or in place of the polarizing plate 51, a functional layer (not shown) having the above-described infrared reflecting function or ultraviolet absorbing function for the first functional layer 61 may be provided. For example, when the support 5 is a windshield of an automobile, the stress on the display panel 3 can be reduced by reflecting infrared rays contained in sunlight or absorbing ultraviolet rays.

  5A and 5B show still another example of the display device 1 of the present embodiment. In the example of FIGS. 5A and 5B, the display panel 3 having a substantially rectangular front shape has the side surface, the display surface 3a, and the opposite of the display surface in any of the two long sides and the two short sides of the rectangular shape. The holding member 4 is in contact with the surface 3b. That is, the frame portion 42 of the holding member 4 is continuous at the edge of the front surface portion 41 without interruption, and surrounds the display panel 3 on the entire periphery. The frame part 42 has a groove 4a on the inner wall, as in the example of FIG. 3A, and the edge of the display panel 3 is inserted into the groove 4a. Accordingly, the movement of the display panel 3 in any direction along the surface 5a of the support 5 and in the direction away from the surface 5a can be restricted by the holding member 4. Further, as described above with reference to FIG. 3A, the success or failure of the contact between the display panel 3 and the first functional layer 61 is not affected by the variation in the thickness of the adhesive 8. In the display device illustrated in FIGS. 5A and 5B, the adhesive 8 is softened by using a solvent or the like, and the holding member 4 and the support 5 are separated from each other to support the display panel 3 as necessary. It can be removed from the body 5.

  As shown in FIG. 5B, a weak adhesive layer 7 made of an adhesive is provided between the display panel 3 and the support 5 that can be generated by using the holding member 4 having the groove 4a. The display panel 3 and the support 5 are securely adhered to each other by the weak adhesive layer 7. Therefore, lifting of the display panel 3 during use of the display device 1 and incorporation of bubbles into the interface between the display panel 3 and the support 5 are prevented. In addition, "weak adhesion" adheres to the adherend exactly, but it can be easily peeled without applying any force in the peeling direction without damaging the adherend and leaving glue etc. on the adhered surface. It means the degree of adhesion obtained. The weak adhesive layer 7 is made of, for example, an adhesive containing, as a main component, an acrylic resin, a silicone resin, or a urethane resin alone or in combination.

  5A and 5B, since the holding member 4 is engaged with the edge of the display panel 3 on the entire periphery of the display panel 3, the wiring 9 connected to the display surface 3a is Is drawn out of the holding member 4 through an opening 4b formed in the front portion 41 of the holding member 4. The opening 4b is provided at a position corresponding to a joint between the wiring 9 and the display panel 3, and has an oblong front shape.

  FIG. 6A shows a rear view of the holding member 4 shown in FIGS. 5A and 5B (a rear view when the surface shown in FIG. 5A is the front of the holding member 4), and FIG. Is a sectional view taken along line VIB-VIB in FIG. The opening 4b is formed near one long side of the holding member 4 having a substantially rectangular front shape so that the direction along the long side coincides with the longitudinal direction of the opening 4b. The opening 4b is preferably not formed in a portion of the front portion 41 that covers an image displayed on the display panel 3 (see FIG. 5B). Therefore, the first functional layer 61 and the second functional layer 62 can be provided in a portion that covers an image displayed on the display panel 3. A groove 4a is formed on the inner wall of the frame portion 42 over the entire circumference of the frame portion 42. The display device 1 shown in FIGS. 5A and 5B has the holding member 4 in which the frame portion 42 is formed over the entire circumference, the front surface portion 41 is formed with the opening 4b, and the weak adhesive layer 7 is formed of the support 5 and the display panel. 3 is the same as the display device 1 shown in FIG. 1A and FIG. 1A and 1B will not be described again.

[Embodiment 2]
FIG. 7 is a cross-sectional view of the display device 1a according to the second embodiment. FIG. 7 shows a cross section corresponding to the cross section shown in FIG. 1B of the display device 1a of the first embodiment described above for the display device 1a of the second embodiment. 8A shows a rear view of the holding member 40 shown in FIG. 7 (a rear view with the surface facing the support 5 in FIG. 7 as a back surface), and FIG. 8B shows a plan view of the holding member 40. (FIG. 8A is a view of the holding member 40 viewed from above). As shown in FIGS. 7, 8A and 8B, the holding member 40 has a front surface portion 41 and a frame portion 42, similarly to the holding member 4 used in Embodiment 1 described above. It has a plate-shaped rear part 43. The rear part 43 is connected to the front part 41 via the frame part 42 so as to be separated from and opposed to the first surface 41 a of the front part 41. The holding member 40 has a back surface 43 adhered to the surface 5 a of the support 5. In the example of FIG. 7, the entire surface of the holding member 40 facing the support 5 is adhered to the surface 5 a of the support 5 using the adhesive 8. The display panel 3 is arranged between the front part 41 and the back part 43 of the holding member 40. The display device 1a according to the second embodiment is the same as the display device 1 according to the first embodiment illustrated in FIGS. 1A and 1B except that the holding member 40 has a back surface portion 43. Therefore, in FIG. 7, FIG. 8A, and FIG. 8B, the same components as those of the display device 1 of the first embodiment are denoted by the same reference numerals as those in FIG. 1A, and redundant description is omitted. .

  In the example of FIG. 7, the rear surface 43 includes a third functional layer 63 having a predetermined function with respect to light propagation on a third surface 43 c facing the first surface 41 a of the front surface 41. Unlike the example of FIG. 7, the back surface 43 may include the third functional layer 63 on a surface (fourth surface) 43d opposite to the third surface 43c. The predetermined function of the third functional layer 63 is exemplified by the same functions as those of the first functional layer 61 and the second functional layer 62 described above. For example, the back surface 43 may include a polarizing plate as the third functional layer 63 on the third surface 43c. When the third functional layer 63 is, for example, a linear polarizing plate, the liquid crystal display panel mounted as the display panel 3 on the surface 5a of the support 5 omits the linear polarizing plate conventionally provided on the TFT substrate. be able to. In the example of FIG. 7, when a linear polarizing plate is provided as the first functional layer 61, the polarization axis of the linear polarizing plate provided as the first functional layer 61 is different from that of the linear polarizing plate provided as the third functional layer 63. The polarization axis may be orthogonal or parallel. Further, the polarization axes of these linear polarizing plates may be inclined by 45 degrees with respect to each other. The third functional layer 63 may have the above-described selective reflection function, selective absorption function, or the like, and may have the same structure as the first functional layer 61 having the same function. If the holding member 40 is provided with a polarizing plate or a layer having a selective reflection function or a selective absorption function as the third functional layer 63, when the display panel 3 is defective, the holding member 40 and the support 5 In addition, the polarizing plate and the like provided as the third functional layer 63 can be reused for another display panel.

  As shown in FIG. 8A and FIG. 8B, the rear surface 43 is disposed so as to face the first surface 41 a of the front surface 41, and is connected to the front surface 41 via the frame 42. The frame portion 42 is discontinuous at a part of the edges of the front portion 41 and the back portion 43 (upper side of the back surface 43 in FIG. 8A), similarly to the frame portion 42 of the holding member 4 illustrated in FIGS. 2A and 2B. Has a part. As a result, as shown in FIG. 8B, an opening 42b is formed on the side surface (illustrated in front in FIG. 8B) of the holding member 40 constituted by the frame portion 42. Preferably, an opening 42b through which the display panel 3 can be inserted is formed. By providing the opening 42b of such a size, the display panel 3 can be detached from the support 5 as needed, with the holding member 40 adhered to the support 5.

  In the example of FIGS. 8A and 8B, the third surface 43 c of the back surface portion 43 is a contact portion 431 in contact with the display panel 3 (see FIG. 7) immediately inside the frame portion 42, and further inside the contact portion 431. In addition, a concave portion 432 that is recessed toward the fourth surface 43d from the contact portion 431 is provided. The third functional layer 63 is provided in the concave portion 432. Preferably, the depth of the concave portion 432 is adjusted such that the surface of the third functional layer 63 facing the display panel 3 and the contact portion 431 on the third surface 43c are substantially flush. However, the concave portion 432 may not be provided. A groove 4c is formed inside the side surface of the holding member 40. The edge of the display panel 3 is inserted into the groove 4c. 8A and 8B, the front surface portion 41 includes the first functional layer 61 and the second functional layer 62, but at least the first functional layer 61 includes the first surface 41a or the second surface 41b. It should just be prepared for. The rear portion 43 is preferably formed using the same material as one or both of the frame portion 42 and the front portion 41. The rear portion 43 may be formed using a material that transmits light. Further, the back surface portion 43 may be formed integrally with the front surface portion 41 and the frame portion 42, or may be formed separately therefrom and then connected to each other.

  On the back surface 43 of the holding member 40, in addition to the third functional layer 63, as shown by a two-dot chain line in FIG. 8B, a fourth functional layer 64 having a predetermined function with respect to light propagation may be provided. Good. The fourth functional layer 64 is provided on the surface of the back surface 43 opposite to the surface on which the third functional layer 63 is provided (the third surface 43c or the fourth surface 43d). When a polarizing plate is provided as the third functional layer 63 on the third surface 43c as in the examples of FIGS. 7 and 8B, for example, the fourth functional layer 64 having an infrared reflecting function or an ultraviolet absorbing function is replaced with the fourth surface 43d. May be provided. As described above, since the holding member 40 has the back surface portion 43 adhered to the support 5, the fourth surface 43 d faces the support 5. When the support 5 is, for example, a windshield of an automobile, stress on the display panel 3 due to infrared rays or ultraviolet rays included in sunlight can be reduced.

[Display panel]
FIG. 9 shows an example of a cross-sectional structure of an organic EL display panel used as the display panel 3 in each of the above-described embodiments. As shown in FIG. 9, the display panel 3 includes a substrate 3c and a plurality of display elements 30 formed on the substrate 3c. The substrate 3c is, for example, a resin film formed using a polyimide resin, or a glass plate. When the display panel 3 is a transparent organic EL display panel having flexibility, for example, a transparent polyimide resin is used as a material of the substrate 3c. Each display element 30 includes a TFT 31, a first electrode 33 connected to the TFT 31, an organic layer 34 formed of an organic material deposited on the first electrode 33 and emitting light, and an organic layer 34 on the organic layer 34. And the second electrode 35 formed. Each display element 30 is separated by a bank 36 formed using SiO ₂ or the like. The first electrode 33 and the bank 36 are formed on the flattening film 32 covering the TFT 31.

The TFT 31 is formed using, for example, polycrystalline silicon or the like, and a transparent amorphous oxide semiconductor such as an oxide of indium, gallium, or zinc may be used for a channel layer thereof. Further, the TFT 31 may be formed using an organic semiconductor material. The first electrode 33 is formed of, for example, a light-transmitting conductive material such as an ITO film. Although the organic layer 34 is shown as a single layer in FIG. 4, it can be actually formed as a multilayer film having a multilayer structure including a hole transport layer, a light emitting layer, an electron transport layer, and the like. The hole transport layer is formed of, for example, an amine-based material, and the light-emitting layer is formed of, for example, a material prepared by doping a host material, such as Alq ₃ or BAlq, with a dopant according to the emission color. The electron transport layer is formed of, for example, Alq ₃ . The organic layer 34 may further include a hole injection layer and an electron injection layer (not shown). The second electrode 35 is formed of a metal having a small work function, such as an Mg-Ag alloy layer or aluminum. Note that the cross-sectional structure shown in FIG. 9 is merely an example, and the structure of the organic EL display panel constituting the display panel 3 and the material of each component are not limited to the structures and materials described here.

In the example illustrated in FIG. 9, the display panel 3 further includes a barrier film formed using a moisture-impermeable material between the display element 30 and the substrate 3c and on the display element 30. . A first barrier film 37 is formed between the display element 30 and the substrate 3c, and a second barrier film 38 is formed on the display element 30. The first barrier film 37 is specifically formed between the TFT 31 and the substrate 3c. The water vapor permeability of the first barrier film 37 and the second barrier film 38 is, for example, 1 × 10 ⁻⁴ g / m ² / day or less. By providing the first barrier film 37 and the second barrier film 38 in this manner, the organic layer 34 that is easily degraded due to contact with moisture is protected. Further, permeation of moisture that reaches the interface between the display panel 3 and the support 5 (see FIG. 1B) through the display panel 3 is strictly prevented. For example, when the display panel 3 is a transparent organic EL display panel, if the display panel 3 partially floats at the interface between the display panel 3 and the support 5 due to the permeation of moisture, etc. Color unevenness or the like may occur in an image seen by the eyes. However, by providing the first barrier film 37 and the second barrier film 38 as shown in FIG. 9, such an adverse effect on the image can be prevented. Note that, unlike the example of FIG. 9, the display panel 3 may include the barrier films 37 and 38 between the display element 30 and the substrate 3c or only on the display element 30.

  In the example of FIG. 9, the first barrier film 37 is a multilayer film including a silicon nitride film 37a and a silicon oxide film 37b. The silicon oxide film 37b is sandwiched between two silicon nitride films 37a. By forming the first barrier film 37 as such a multilayer film, it is possible to obtain a barrier film having high barrier performance and hardly causing cracks or the like. However, the first barrier film 37 may be a single layer film or a multilayer film including a plurality of layers other than three layers, and is formed using a material other than silicon nitride and silicon oxide. Is also good.

  In the example of FIG. 9, the second barrier film 38 has a five-layer structure including two silicon nitride films 38a, two silicon oxide films 38b, and an organic film 38c. The organic film 38c is formed using, for example, an epoxy resin or an acrylic resin. Since irregularities on the surface of the display element 30 and foreign substances (not shown) attached to the surface are buried in the organic film 38c which may have flexibility, the silicon nitride film 38a and the like are stably formed on the organic film 38c. Can be formed. Further, by interposing the silicon oxide film 38b, the adhesion between the silicon nitride film 38a and the organic film 38c can be improved. However, the silicon oxide film 38b and the organic film 38c may not be formed, and a silicon oxynitride film having a high film forming speed may be provided instead of the silicon nitride film 38a. It may be a single layer film or a multilayer film including a plurality of layers other than five layers.

  In each of the above-described embodiments, a circular polarizing plate or an antireflection layer that can be provided on a plurality of display elements in a conventional organic EL display panel includes the first functional layer 61 provided on the front surface 41 of the holding member 4 or the like. It can be replaced by the second functional layer 62 (see FIG. 2B). Further, an infrared reflecting layer or an ultraviolet absorbing layer which can be provided on the upper surface (the surface on which the display element is provided) and / or the lower surface (the surface facing the display element) of the substrate on which the TFT is formed is provided on the back surface of the holding member 40. The third functional layer 63 or the fourth functional layer 64 (see FIG. 8B) provided in the portion 43 can be substituted.

  Although not shown, when the display panel 3 is a liquid crystal display panel, the display panel 3 is separated from a first substrate (TFT substrate) formed using a glass plate or the like and the first substrate. And a liquid crystal layer between the first and second substrates. Further, the display panel 3 includes a TFT formed on the first substrate, a pixel electrode connected to the TFT, and a first alignment film formed on the pixel electrode. Further, the display panel 3 includes a color filter, a common electrode, and a second alignment film which are sequentially provided on a surface of the second substrate facing the first substrate. A polarizing plate is provided on each of the first and second substrates on the opposite side to the side facing the liquid crystal layer. As described above, these polarizing plates can be replaced by polarizing plates that can be provided as the first functional layer 61 or the third functional layer 63 in the holding member 4 (see FIG. 2B) or the holding member 40 (see FIG. 8B). . Note that the structure of the liquid crystal display panel that can constitute the display panel 3 in the display devices 1 and 1a of the above-described embodiments is not limited to the structure described here.

[Production method]
Next, a method for manufacturing the display device according to the third embodiment will be described with reference to the drawings. FIG. 10 shows an outline of the manufacturing method of the present embodiment, taking the display device 1 shown in FIG. 1 referred to in the above description as an example. As shown in FIG. 10, in the manufacturing method of the display device of the present embodiment, the display panel 3 is formed by forming a plurality of display elements 30 (see FIG. 9) on the substrate 3c, and the display panel 3 is mounted. A holding member having a support body 5 having a surface 5a to be placed and having a plate-shaped front part 41 and a frame part 42 formed by a bar-shaped member provided along an edge of the front part 41 4 including preparing. Furthermore, in the method for manufacturing a display device of the present embodiment, the holding member 4 is bonded to the surface 5 a of the support 5 with the first surface 41 a of the front portion 41 facing the support 5, and the display panel 3 is formed by the front portion 41. The display panel 3 is supported such that the inner wall of the frame portion 42 of the holding member 4 is engaged with the edge of the display panel 3 so that the display surface 3a is covered, and the opposite surface 3b of the display surface 3a faces the support 5. Resting on the surface 5 a of the body 5. In the method of manufacturing the display device according to the present embodiment, in preparing the holding member 4, the front surface 41 is formed using a material that transmits light, and the first surface 41 a of the front surface 41 or the first surface 41 a is opposite to the first surface 41 a. This includes providing a first functional layer 61 having a predetermined function with respect to light propagation on the second surface 41b (see FIGS. 11A and 11B). The details will be described below.

  First, the formation of the display panel 3 will be described with reference to FIG. 9 again. As the display panel 3, an organic EL display panel or a liquid crystal display panel is formed. When an organic EL display panel is formed as the display panel 3, for example, an organic EL display element (display element 30) including a TFT 31, an organic layer 34, and the like is provided on a substrate 3c made of a polyimide film or a glass plate. It is formed. At this time, preferably, the first barrier film 37 is formed between the substrate 3c and the display element 30 using a moisture-impermeable material. Non-moisture permeable materials include silicon nitride and silicon oxide. In the example of FIG. 9, the first barrier film 37 is formed by forming three layers of films (a silicon oxide film 37b and silicon nitride films 37a on both upper and lower sides of the silicon oxide film 37b) on the substrate 3c. . The silicon nitride film 37a and the silicon oxide film 37b are formed by, for example, a plasma enhanced chemical vapor deposition (PECVD) method, a sputtering method, or the like.

  Since the TFT 31 constituting the organic EL display element, the first and second electrodes 33 and 35, and the organic layer 34 can be formed by any method including a known method, a detailed description thereof will be omitted. Also, when a liquid crystal display panel is formed as the display panel 3, the electrodes, the alignment film, the polarizing plate, and the liquid crystal layer constituting the liquid crystal display element can be formed by any method including a known method. Therefore, the detailed description is omitted.

  After the formation of the display element 30, a second barrier film 38 is preferably formed on the display element 30 using a non-moisture permeable material. In the example of FIG. 9, a silicon nitride film 38a, a silicon oxide film 38b, and an organic film 38c are sequentially formed on the display element 30, and the silicon oxide film 38b and the silicon nitride film 38a are formed again. The silicon nitride film 38a and the silicon oxide film 38b are formed by, for example, a PECVD method or a sputtering method. The organic film 38c is formed, for example, by printing an epoxy resin or an acrylic resin using an inkjet printer. When the second barrier film 38 is formed, for example, only the silicon nitride film 38a and the organic film 38c may be formed. As described above, in the method of manufacturing the display device according to the present embodiment, in forming the display panel 3, one of or both of the substrate 3 c and the display element 30 and the upper part of the display element 30 are made of a non-moisture permeable material. The barrier film (the first barrier film 37 and the second barrier film 38) may be formed using a material.

  FIG. 10 is referred to again. The holding member 4 is prepared by appropriately processing a material such as a synthetic resin or a natural resin. The holding member 4 has a plate-shaped front part 41 and a frame part 42 formed by a bar-shaped member provided to protrude from the first surface 41 a of the front part 41 along the edge of the front part 41. Then, it is formed by molding or pressing using an appropriately manufactured mold or cutting. The first surface 41 a of the front surface 41 of the holding member 4 is a surface other than the side surface of the plate-shaped front portion 41 and is a surface facing the display panel 3 and the support 5 in the display device 1. In the example of FIG. 10, a notch 42 a is provided on the side surface of the holding member 4 by providing a discontinuous portion in the frame portion 42. For example, the notch 42a can be provided in the holding member 4 by appropriately manufacturing a mold used for forming the holding member 4. As described later, the display panel 3 is moved from the outside of the frame portion 42 to a predetermined mounting position inside the frame portion 42 through the notch 42a.

  In preparing the holding member 4, at least a portion of the front portion 41 that covers an image displayed on the display panel 3 is formed using a material that transmits light. For example, the entire holding member 4 may be integrally formed by molding using a transparent silicone rubber, an acrylic resin, a transparent PC resin, a transparent PET resin, a transparent MS resin, or the like.

  With reference to FIGS. 11A and 11B, preparation of the holding member 4 will be further described. In preparing the holding member 4, the first functional layer 61 is provided as described above. In preparing the holding member 4, in addition to the first functional layer 61, a second functional layer 62 having a predetermined function different from the function of the first functional layer 61 with respect to light propagation is provided on the front surface portion 41. You may. The predetermined functions of the first functional layer 61 and the second functional layer 62 are, as described above, a function as a polarizing plate, a selective reflection function, a selective absorption function, and the like. The second functional layer 62 is provided on a surface of the front portion 41 opposite to the surface on which the first functional layer 61 is provided. That is, as shown in FIG. 11A, when the first functional layer 61 is provided on the first surface 41a, the second functional layer 62 is formed on the second surface 41b.

  When the first functional layer 61 or the second functional layer 62 having a function as a polarizing plate is provided, for example, a commercially available polarizing plate is used as the first functional layer 61 shown in FIG. 41 may be adhered. Such a polarizing plate is adhered to the holding member 4 using an optical transparent adhesive such as the above-described OCA or OCR.

  When the first functional layer 61 or the second functional layer 62 having the above-described anti-reflection function or selective reflection, selective absorption or selective transmission functions is provided, an optical functional film or the like having these functions is provided. And may be adhered to the holding member 4. However, the optically functional film formed separately from the holding member 4 usually has a base material, so that the light transmittance is reduced and the interface between materials having different refractive indexes is increased. Further, when a gap is formed between the film formed separately and the holding member 4, the interface further increases. Therefore, the first functional layer 61 or the second functional layer 62 having an anti-reflection function or the like is preferably formed directly on the front surface 41 of the holding member 4. For example, as in the case of the second functional layer 62 shown in FIG. 11A, a sputtering method for attaching the sputtered particles S to the front surface portion 41 of the holding member 4, a vacuum evaporation method, a CVD (Chemical Vapor Deposition) method, or the like is used. . Preferably, the first functional layer 61 or the second functional layer 62 having an optical function is formed by forming a multilayer film containing magnesium fluoride or the like using any of these methods. You. Further, the first functional layer 61 or the second functional layer 62 having an optical function may be formed by applying, drying, and heating a solution containing material particles using a sol-gel method.

The first functional layer 61 or the second functional layer 62 having an antistatic function is formed by sputtering a transparent conductive material such as indium tin oxide (ITO) or indium oxide-zinc oxide (IZO), or a solution thereof. And heat curing. Further, the first functional layer 61 or the second functional layer 62 having a sludge prevention function can be formed by, for example, coating a fluororesin. Further, the first functional layer 61 or the second functional layer 62 having a surface protection function against scratches or the like can be formed by a film containing SiO ₂ or the like. The film containing SiO ₂ is formed to a thickness of, for example, about 10 μm to 30 μm by a CVD method or coating. The film containing SiO ₂ may have a pencil hardness of about 5H by being formed in this way, and may have a pencil hardness of about 6H to 8H by being baked. Further, a film containing SiO ₂ having a thickness of 5 μm or less and having a pencil hardness of more than 8H may be formed as the first functional layer 61 or the second functional layer 62 by a sputtering method or a vacuum evaporation method.

  As shown in FIG. 11B, the front surface portion 41 and the frame portion 42 of the holding member 4 may be separately formed by die molding or the like, and then both may be bonded. In this case, the front part 41 and the frame part 42 may be formed using different materials. For example, a glass plate may be used for the front part 41 formed using a material that transmits light. In the example of FIG. 11B, the first functional layer 61 and the second functional layer 62 are already provided on the front surface portion 41 before being bonded to the frame portion 42. Since the bonding of the polarizing plate and / or the formation of the optical function film described above can be performed in the state of the front part 41 alone, the first function layer 61 and the like can be easily formed. The bonding between the front portion 41 and the frame portion 42 is performed after the frame portion 42 alone is bonded to the support 5 and before or after the display panel 3 (see FIG. 10) is placed on the surface 5 a of the support 5. You may. By doing so, the mounting of the display panel 3 may be facilitated.

  With reference to FIG. 10 again, the method of manufacturing the display device of the present embodiment will be continuously described. A support 5 having a surface 5a on which the display panel 3 is to be placed is prepared. Any material such as glass, metal, and synthetic resin can be used for the support 5. The support 5 may be prepared by processing these materials by an arbitrary method, or an existing article may be prepared as the support 5. As described above, for example, a glass plate used for a housing of various devices, a window of a house or a display case, or a windshield of an automobile may be prepared as the support 5.

  Although not shown in FIG. 10, a polarizing plate 51 (see FIG. 4) may be provided on the surface 5a of the support 5. In addition to or in place of the polarizing plate 51, a functional layer (not shown) having an infrared reflecting function or an ultraviolet absorbing function may be provided. These optically functional films or polarizing plates that can be provided on the surface 5a of the support 5 can be provided by the same method as the method for forming the first functional layer 61 and the second functional layer 62 described above.

  The holding member 4 is adhered to the surface 5 a of the prepared support 5 using an adhesive 8. The holding member 4 is bonded to the support 5 at a position where the frame portion 42 surrounds a proper mounting position of the display panel 3. If necessary, heat treatment is performed to cure the adhesive 8. Further, a wiring 9 composed of an FPC or the like is prepared. For example, the wiring 9 and the display panel 3 are formed by pressing and heating while an anisotropic conductive film is sandwiched between the wiring 9 and the display panel 3. Is connected. The adhesive 8 may be applied to one or both of the joining surface and the surface 5a of the holding member 4, and as shown in FIG. And the support 5. As the adhesive 8, an arbitrary adhesive such as acrylic, silicone, or urethane is used.

  After the holding member 4 is bonded to the support 5, the inner wall of the frame 42 of the holding member 4 and the edge of the display panel 3 are engaged. As shown in FIG. 10, the display panel 3 is moved from the outside of the frame 42 to a predetermined mounting position inside the frame 42 through the notch 42 a formed in the holding member 4. Inside the frame 42, the inner wall of the frame 42 engages with the edge of the display panel 3, and the front surface 41 covers the display surface 3 a of the display panel 3. The display panel 3 is moved inside the frame portion 42 with the opposite surface 3b of the display surface 3a toward the support 5. Then, the display panel 3 is placed, for example, at an appropriate placement position where the front end of the display panel 3 in the movement direction abuts on the inner wall of the frame portion 42 facing the notch 42a. By attaching the holding member 4 to an appropriate position of the support body 5, the display panel 3 is moved from the notch 42a to the inside of the frame 42, and the front end of the display panel 3 contacts the inner wall of the frame 42. The display panel 3 can be positioned at an appropriate mounting position only by moving the display panel 3 until it touches. Even if the holding member 4 is not adhered to an appropriate position on the surface 5a of the support body 5, the holding member 4, which can have a simple structure as compared with the display panel 3, can be supported without being damaged. It is considered that it is easily removed from the body and adhered again. Further, even if the holding member 4 is damaged, the holding member 4 can be prepared at a lower cost than the display panel 3, so that the loss cost can be reduced.

  Note that the display panel 3 and the holding member 4 may be combined with each other before the holding member 4 is bonded to the support 5 so that the edge of the display panel 3 and the inner wall of the holding member 4 may be engaged. . Then, after that, the holding member 4 may be bonded to the support 5 and the display panel 3 may be placed on the front surface 5a. Also in this case, the possibility of rearrangement of the holding member 4 is relatively high, and it is easy to suppress the loss cost in the event of an emergency, as described above.

  FIG. 10 shows an outline of the manufacturing method of the present embodiment by taking the display device 1 shown in FIG. 1 as an example. However, the display device 1a shown in FIG. It can be manufactured in a similar manner. When the display device 1a illustrated in FIG. 7 is manufactured, the holding member 40 illustrated in FIGS. 8A and 8B referred to above is prepared. The holding member 40 further has a plate-shaped rear part 43 connected to the front part 41 via a frame part 42 so as to be separated from and opposed to the first surface 41 a of the front part 41. The holding member 40 can be formed by the same method as the above-described method of forming the holding member 4 so as to have such a back surface portion 43. The holding member 40 is bonded to the front surface 5a of the support 5 with the back surface 43 facing the support 5 and preferably using the adhesive 8 or the like over the entire back surface 43. Further, for example, by appropriately manufacturing a mold used for forming the holding member 40, a discontinuous portion is provided in the frame portion 42, and as a result, an opening 42b is provided in a side surface of the holding member 4. When the display panel 3 is placed on the surface 5a of the support 5 described above, the display panel 3 is moved from the outside of the frame 42 to a predetermined placement position inside the frame 42 through the opening 42b.

  When the holding member 40 is prepared, the method of manufacturing the display device according to the present embodiment uses the third surface 43c or the third surface 43c facing the first surface 41a of the front portion 41 in the back portion 43 of the holding member 40. May be further provided on the surface (the fourth surface 43d) opposite to the third functional layer 63 having a predetermined function with respect to light propagation. As the third functional layer 63, a polarizing plate may be provided similarly to the first functional layer 61 or the second functional layer 62, and an optical functional film having an optional function such as a selective reflection function or a selective absorption function may be used. It may be provided. The third functional layer 63 can be formed by a method similar to the method of providing the first functional layer 61 and the second functional layer 62 described above.

  In preparing the holding member 40, the front part 41 and the back part 43 may be formed separately as shown in FIG. 11C, and then both may be connected. In that case, preferably, before the front part 41 and the back part 43 are connected, the first functional layer 61 is provided on the first surface 41 a of the front part 41 as necessary, and the third functional layer 63 is provided. Are provided on the third surface 43c of the back surface portion 43. That is, after performing one or both of providing the first functional layer 61 on the first surface 41a of the front surface portion 41 and providing the third functional layer 63 on the third surface 43c of the rear surface portion 43, The front part 41 and the back part 43 may be connected via the frame part 42. By separately forming the front portion 41 and the back portion 43, one or both of the first functional layer 61 and the third functional layer 63 can be easily provided before connecting the both.

  When the display panel 3 is moved to a predetermined mounting position as shown in FIG. 10 referred to above, the lubricity of the display panel 3 is improved by using the lubricant F as shown in FIG. 12A. May be. In the example of FIG. 12A, the surface 5a of the support 5 is covered with the lubricant F supplied by application, dropping, spraying, or the like. By using the lubricant F, the display panel 3 can be smoothly moved toward the mounting position. Examples of the lubricant F include a water-soluble solvent such as ethanol and silicone oil, but the lubricant F is not limited thereto. If one or both of the above-described first and second barrier films 37 and 38 (see FIG. 9) are formed, the permeation of the lubricant F into the display panel 3 is prevented. Lubricant F can be used.

  When the lubricant F is used, the display panel 3 is moved to a predetermined mounting position, and then, as shown in FIG. It may be extruded from between the support and the support 5. In the example of FIG. 12B, the display panel 3 is pressed by the pressing member 101 toward the support 5 from the second surface 41 b of the front portion 41 of the holding member 4 together with the front portion 41. As described above, when the holding member 4 is formed using a material having elasticity, such as transparent silicone rubber, the display can be performed without giving excessive stress to the holding member 4 in such a pressing operation. An appropriate load can be applied to the panel 3.

  The pressing member 101 is preferably moved from the distal end to the proximal end of the display panel 3 from the notch 42a or the opening 42b (see FIG. 8B) of the holding member 4. That is, the display panel 3 is pushed toward the support 5 while changing the pressing position from the distal end to the proximal end from the notch 42a or the opening 42b (see FIG. 8B) of the holding member 4 in the display panel 3. . By pushing the display panel 3 in this way, the lubricant F can be efficiently pushed out from between the display panel 3 and the support 5. Further, the display panel 3 and the support 5 can be brought into close contact with each other without newly entrapped air bubbles. The pressing member 101 is not particularly limited as long as it can apply a load to the display panel 3. A rollable member such as a roller is preferable as the pressing member 101 from the viewpoint of reducing stress applied to the holding member 4 and the like.

  When the display panel 3 is removed from the support 5 as necessary, for example, a gas may be injected from the notch 42a of the holding member 4 or the opening 42b (see FIG. 8B) of the holding member 40. By doing so, the display panel 3 and the surface 5a of the support 5 can be easily separated. In addition, as shown in FIG. 12B, such a gas injection hole 42c may be provided in the frame portion 42 of the holding member 4. Such a vent hole 42c is useful in that it can serve as a gas exhaust hole inside the holding member 4 even when the display panel 3 is moved inside the frame portion 42.

  FIG. 13 shows another example of the display device manufacturing method of the present embodiment, taking the display device 1 shown in FIGS. 5A and 5B referred to above as an example. The holding member 4 used in the display device 1 shown in FIG. 5A and FIG. 5B does not have a discontinuous portion in the frame portion 42, and therefore, both the notch and the opening are formed on the side surface of the holding member 4. Not formed. Therefore, the method shown in FIG. 13 differs from the example shown in FIG. 10 mainly in how the display panel 3 is engaged with the holding member 4 and how the support 5 is placed on the surface 5a.

  That is, the display panel 3, the holding member 4, and the support 5 are prepared in the same manner as the method described with reference to FIG. 10, and thereafter, the display panel 3 includes the display surface 3 a and the front surface of the holding member 4. The first member 41 is combined with the holding member 4 from a state where the first surface 41a (see FIG. 5B) faces the first member 41. The edge of the display panel 3 is inserted into the groove 4a (see FIG. 5B) of the inner wall of the frame 42, and the edge of the display panel 3 and the inner wall of the frame 42 engage. Further, the display surface 3 a of the display panel 3 is covered by the front surface 41 of the holding member 4. When the holding member 4 is formed of a material having elasticity or flexibility such as the above-described silicone rubber or the like, as shown in FIG. The edge can be easily inserted. Further, as shown in FIG. 13, the wiring 9 is drawn out of the holding member 4 through the opening 4 b in the front surface portion 41 of the holding member 4.

  The holding member 4 is bonded to the surface 5a of the support 5 with an adhesive 8 or the like with the first surface 41a of the front surface portion 41 facing the support 5 in a state where the holding member 4 is combined with the display panel 3. Further, together with the bonding, the display panel 3 is placed on the surface 5a of the support 5 with the surface opposite to the display surface 3a facing the support 5. In the example shown in FIG. 13, the display panel 3 is placed on the surface 5 a of the support 5 via the weak adhesive layer 7. The weak adhesive layer 7 can be formed, for example, by arranging a weak adhesive sheet formed using an adhesive on the surface 5a of the support 5 or on the surface of the display panel 3 opposite to the display surface 3a. . Also in the example shown in FIG. 13, before the display panel 3 is mounted on the surface 5 a of the support 5, the polarizing plate 51 or the optically functional film having a selective reflection function is provided on the surface 5 a of the support 5. It may be formed by the method described above.

[Summary]
(1) A display device according to an embodiment of the present invention includes a display panel that displays an image by controlling emission or transmission of light, a support having a surface on which the display panel is mounted, and the support. A holding member adhered to the surface of the display panel and engaging the edge of the display panel to hold the display panel at a predetermined position on the surface, wherein the display panel has a surface opposite to the display surface. The holding member is formed using a material that transmits light, a plate-shaped front portion that covers the display surface, and a second portion that is directed to the display surface at the front portion. And a frame formed by a rod-shaped member protruding from one surface and provided along an edge of the front surface, wherein the front surface is the first surface or the first surface. Light propagation on the second surface opposite to And a first functional layer having a predetermined function regarding.

  According to the configuration of (1), even when some of the components of the display device are defective, the other components can be easily reused in the display device or another display device.

(2) In the display device according to (1), the first functional layer may be formed of an antireflection layer configured to suppress light reflection or a polarizing plate. By doing so, even when a defect occurs in the display panel, the polarizing plate or the antireflection layer can be reused.

(3) In the display device according to the above (1) or (2), the holding member includes the first functional layer on the first surface of the front surface, and the first functional layer has light propagation. A second functional layer having a predetermined function different from the function may be provided on the second surface. By doing so, even when a defect occurs in the display panel, two functional layers having different functions with respect to light propagation can be reused.

(4) In the display device according to (3), the first functional layer may include a polarizing plate, and the second functional layer may include an anti-reflection layer configured to suppress light reflection. Good. By doing so, the polarizing plate and the display panel can be brought into contact with each other, so that an appropriate polarizing action can be obtained and the reflection of external light can be effectively prevented.

(5) In the display device according to any one of (1) to (4), the holding member is connected to the front surface via the frame so as to be separated from and opposed to the first surface of the front surface. The display panel may further include a flat plate-shaped back portion, wherein the back portion is bonded to the surface, and the display panel is disposed between the front portion and the back portion. By doing so, it becomes easy to provide a specific functional layer between the display panel and the support.

(6) In the display device according to (5), the back surface has a predetermined function with respect to light propagation on a third surface opposite to the first surface of the front surface or a surface opposite to the third surface. May be provided. By doing so, an optically functional film or the like that can be provided on the surface opposite to the display surface in the conventional display panel can be reused when a defect occurs in the display panel.

(7) In the display device according to (6), the rear surface may include a polarizing plate as the third functional layer on the third surface. By doing so, the polarizing plate can be provided in contact with the display panel, and the polarizing plate can be reused when a defect occurs in the display panel.

(8) In the display device according to any one of (1) to (5), a polarizing plate may be provided on the surface of the support. By doing so, the polarizing plate that can be provided on the surface opposite to the display surface in the conventional display panel can be reused when a defect occurs in the display panel.

(9) In the display device according to any one of (1) to (8), the frame portion has a discontinuous portion at a part of the edge portion of the front surface portion, and is configured by the frame portion. A cutout or an opening through which the display panel can be inserted may be formed on a side surface of the holding member. By doing so, the display panel can be easily removed from the support as needed.

(10) In the display device according to any one of (1) to (9), the display panel includes a substrate, and a plurality of display elements formed on the substrate, and the display panel further includes: A barrier film formed using a moisture-impermeable material may be provided between the display element and the substrate and / or on the display element. By doing so, the display panel can be protected from moisture and the like. In addition, floating of the display panel from the support can be suppressed.

(11) In the display device according to the above (10), the water vapor permeability of the barrier film may be 1 × 10 ⁻⁴ g / m ² / day or less. By doing so, it is possible to more reliably prevent moisture from penetrating into the display panel.

(12) In a method of manufacturing a display device according to another embodiment of the present invention, a display panel is formed by forming a plurality of display elements on a substrate, and a support having a surface on which the display panel is to be mounted is provided. A body is prepared, and is constituted by a plate-shaped front portion and a rod-shaped member protruding from a first surface which is a surface other than a side surface of the front portion, and provided along an edge of the front portion. A holding member having a frame portion, the first surface facing the support, the holding member being bonded to the surface of the support, and the front surface covering the display surface of the display panel. As described above, the inner wall of the frame portion is engaged with the edge of the display panel, and the display panel is placed on the surface of the support with the opposite surface of the display surface facing the support. In the preparation of the holding member, light is transmitted. Forming the front surface using a material to be formed, and providing a first functional layer having a predetermined function with respect to light propagation on the first surface or the second surface opposite to the first surface of the front surface. Contains.

  According to the configuration of (12), it is possible to easily manufacture a display device in which components can be easily reused and the display panel is provided at an appropriate position.

(13) In the display device manufacturing method according to the above (12), the first functional layer is provided on the first surface of the front surface of the holding member, and the first functional layer is provided on the second surface with respect to light propagation. The method may further include providing a second functional layer having a predetermined function different from the function of the layer. By doing so, it is possible to manufacture a display device in which two functional layers having different functions with respect to light propagation can be reused even when a defect occurs in the display panel.

(14) In the method of manufacturing a display device according to the above (12) or (13), the holding member is connected to the front surface via the frame so as to be separated from and opposed to the first surface of the front. Further comprising a plate-shaped rear surface, and in preparing the holding member, a third surface of the rear surface opposite to the first surface of the front surface, or a surface opposite to the third surface. The method may further include providing a third functional layer having a predetermined function with respect to propagation of light, and the holding member may be bonded to the surface of the support with the back surface facing the support. By doing so, it is possible to manufacture a display device that can reuse an optically functional film or the like that can be provided on a surface opposite to a display surface in a conventional display panel when a defect occurs in the display panel.

(15) In the method for manufacturing a display device according to (14), in preparing the holding member, the front surface and the rear surface are separately formed, and the first functional layer is formed on the first surface of the front surface. And providing the third functional layer on the third surface of the rear portion, and connecting the front portion and the rear portion via the frame portion. May be further included. By doing so, the first functional layer and / or the third functional layer can be easily provided.

(16) The method for producing a display device according to (12) or (13) may further include providing a polarizing plate on the surface of the support. By doing so, it is possible to manufacture a display device in which a polarizing plate that can be provided on a surface opposite to a display surface in a conventional display panel can be reused when a defect occurs in the display panel.

(17) In the method for manufacturing a display device according to any one of (12) to (16), in forming the display panel, the display device may be disposed between the substrate and the display element and / or on the display element. And forming a barrier film using a non-moisture permeable material. By doing so, the display panel is protected from moisture and the like, and a display device in which the display panel floats little from the support can be manufactured.

(18) In the method for manufacturing a display device according to any one of the above (12) to (17), in the preparation of the holding member, an opening or a cutout is formed in a side surface of the holding member by providing a discontinuous portion in the frame portion. And may further include moving the display panel from the outside of the frame to a predetermined mounting position inside the frame through the opening or the notch. By doing so, the display panel can be easily mounted at a predetermined mounting position.

(19) In the method of manufacturing a display device according to the above (18), in forming the display panel, a barrier is formed by using a non-moisture permeable material both between the substrate and the display element and above the display element. Further comprising forming a film, when moving the display panel to the predetermined mounting position, using a lubricant to improve the slidability of the display panel, and mounting the display panel in the predetermined mounting position. After moving to the position, pressing the display panel toward the support while changing the pressing position from the distal end to the proximal end from the opening or notch in the display panel, the lubricant is applied to the display panel. Extruding from between the display panel and the support may further comprise. By doing so, the display panel can be smoothly moved toward the mounting position, and the display panel can be in close contact with the surface of the support.

1, 1a Display device 3 Display panel 3a Display surface 3b Opposite surface 3c Substrate 30 Display element 37 First barrier film 4, 40 Holding member 41 Front surface 41a First surface 41b Second surface 42 Frame 42a Notch 42b Opening 43 Back Part 43c third surface 43d opposite surface (fourth surface)
5 Support 5a Surface 51 Polarizer 61 First functional layer 62 Second functional layer 63 Third functional layer 64 Fourth functional layer 101 Pressing member F Lubricant

Claims (16)

A display panel that displays an image by controlling the emission or transmission of light;
A support having a surface on which the display panel is mounted,
A holding member adhered to the surface of the support, and holding the display panel at a predetermined position on the surface by engaging with an edge of the display panel;
The display panel has a surface opposite to the display surface facing the support,
The holding member,
A plate-shaped front portion including a portion formed of a material that transmits light and covering an image displayed on the display panel,
A frame portion configured by a rod-shaped member protruding from the first surface facing the display surface in the front surface portion and provided along an edge of the front surface portion;
A plate-shaped rear portion connected to the front portion via the frame portion so as to be spaced and opposed to the first surface of the front portion;
Has,
The front part and the frame part are integrally formed,
The back portion is adhered to the surface,
The display panel is disposed between the front part and the back part,
The front part, the second surface opposite the first surface or the first surface, first have to have a predetermined function with respect to the propagation of light that are formed on the first surface or the second surface A display device having a functional layer. The display device according to claim 1 , wherein the first functional layer has an infrared reflecting function or an ultraviolet absorbing function . The front surface includes the first functional layer on the first surface, and a second functional layer on the second surface having a predetermined function different from the function of the first functional layer with respect to light propagation. The display device according to claim 1. The display device according to claim 3, wherein the second functional layer has an infrared reflecting function or an ultraviolet absorbing function. The said back surface part is provided with the 3rd functional layer which has a predetermined function regarding light propagation in the 3rd surface facing the said 1st surface of the said front surface part, or the surface opposite to the said 3rd surface. The display device according to any one of claims 1 to 4 . Before Symbol third functional layer, anti-reflection function, has an infrared reflection function, or the ultraviolet absorption function, the display device according to claim 5. The display device according to claim 1, wherein a functional layer having an infrared reflecting function or an ultraviolet absorbing function is provided on the surface of the support. The frame portion has a discontinuous portion at a part of the edge portion of the front surface portion,
The display device according to claim 1, wherein a cutout or an opening through which the display panel can be inserted is formed on a side surface of the holding member formed by the frame portion. The display device according to claim 8, wherein the display panel is in contact with the holding member at a side surface, the display surface, and a surface opposite to the display surface at an edge of the display panel. Further comprising a wiring connected to the display panel,
The display device according to claim 8, wherein the holding member includes an opening in the front surface portion through which the wiring is passed. The display device according to claim 8, wherein a front portion of the holding member is formed using transparent silicone rubber. Forming a display panel by forming a plurality of display elements on a substrate,
Prepare a support having a surface on which the display panel is to be mounted,
A plate-shaped front portion, a frame portion formed by a bar-shaped member protruding from a first surface which is a surface other than a side surface of the front portion, and provided along an edge of the front portion; A holding member having a plate-shaped rear surface portion connected to the front surface portion via the frame portion so as to be spaced and opposed to the first surface of the front surface portion,
Bonding the holding member to the surface of the support,
Engage the inner wall of the frame portion and the edge of the display panel so that the display surface of the display panel is covered by the front portion,
Placing the display panel on the surface of the support with the opposite side of the display surface facing the support,
Including
In preparing the holding member,
Using a material that transmits light, the front part including a part to cover an image displayed on the display panel is formed integrally with the frame part ,
A first functional layer having a predetermined function with respect to light propagation is directly formed on the first surface or the second surface opposite to the first surface in the front surface,
A third functional layer having a predetermined function with respect to light propagation is provided on a third surface of the back surface facing the first surface of the front surface, or on a surface opposite to the third surface. ,
A method for manufacturing a display device, comprising: bonding the back surface to the support when bonding the holding member to the surface. In prepared before Symbol holding member,
The first functional layer is directly formed on the first surface before SL front portion,
Before Stories second surface, providing a second functional layer having a predetermined function different from the functions of the terms of the propagation of light first functional layer further including the method of manufacturing a display device according to claim 12 . 14. The method according to claim 12 , further comprising: providing a functional layer having an infrared reflecting function or an ultraviolet absorbing function on the surface of the support. In the preparation of the holding member, further comprising providing an opening or a notch in a side surface of the holding member by providing a discontinuous portion in the frame portion,
The display device according to any one of claims 11 to 14 , further comprising: moving the display panel from outside the frame portion to a predetermined mounting position inside the frame portion through the opening or notch. Manufacturing method. Connecting wiring to the display panel;
The method of manufacturing a display device according to claim 15, further comprising: drawing the wiring to the outside of the holding member through an opening in the front surface of the holding member.

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