JP5287541B2 - Electro-optical device and electronic apparatus - Google Patents

Description

  The present invention relates to an electro-optical device and an electronic apparatus including the electro-optical device.

A thin panel and a flat panel display used for a mobile phone are required to be thin and lightweight. Recently, a flat panel display with flexibility has been proposed for developing new applications.
For example, Patent Document 1 proposes an organic EL display device in which an organic EL (Electro Luminescence) layer is sandwiched between two glass substrates thinned to 100 μm or less. The document also describes that a resin-made reinforcing layer is provided on the outside of the front and back glass substrates in order to compensate for the lack of strength associated with the reduction in thickness.

Further, in Patent Document 2, as shown in FIG. 11, a liquid crystal display device having a structure in which a liquid crystal panel 90 made of a pair of thin glass substrates is wrapped and laminated with two transparent resin films 95a and 95b from the front and back surfaces. 300 have been proposed. Further, a polarizing plate 91 also serving as a reinforcing layer is disposed on the front surface of the liquid crystal panel 90, and a resin reinforcing plate 92 is disposed on the back surface. That is, the liquid crystal panel 90 was laminated by the two resin films 95a and 95b in a state where the resin reinforcing plates were attached to the front and back surfaces.
These reinforcing plates and the reinforcing structure by laminating resin films are considered to supplement the characteristics of the glass substrate, which is relatively strong against compressive stress but very weak against tensile stress. Further, this document also describes that the reinforcing structure can be applied to an organic EL panel.

JP 2005-19082 A Japanese Patent No. 4131639

However, there is a problem that it is difficult to obtain sufficient practical strength with a conventional reinforcing structure made of a resin reinforcing plate or a resin film laminate. In other words, the conventional display device has a problem that it is difficult to achieve both flexibility and practical strength (toughness).
This is because a resin reinforcing plate or a resin film attached to the glass substrate bends following the glass substrate when bending stress is applied. In other words, the reinforcing plate and the resin film are easily bent to the limit point (limit radius) of the glass substrate together with the glass substrate, so that the glass substrate may be cracked and cracked.

Moreover, in the conventional reinforcing structure, since the liquid crystal panel with the reinforcing plates attached to the front and back surfaces is laminated by the two resin films 95a and 95b, the liquid crystal panel 90 is not only thickened. When laminating, there is a problem that a gap G is generated at the peripheral edge of the liquid crystal panel 90.
This gap G becomes a problem particularly when the reinforcing structure is applied to an organic EL panel. Specifically, if a large gap G is formed at the peripheral edge of the organic EL panel, moisture may enter the gap G, leading to deterioration of the organic EL layer.
In addition, since the organic EL panel is a self-luminous device and generates heat during display, the conventional reinforcing structure has a problem that no consideration is given to heat dissipation. In other words, the conventional reinforcing structure has a problem that it is difficult to suppress deterioration due to heat generation of the organic EL panel.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following application examples or forms.

(Application example)
A resin film that is laminated so as to cover a display panel in which an electro-optic layer is sandwiched between a pair of glass substrates, a first surface on the display area side of the display panel, and a second surface facing the first surface And a reinforcing member is provided on the resin film covering at least the first surface, and the reinforcing member is formed so as to have an opening in a display area of the display panel. An electro-optical device.

According to this electro-optical device, since the reinforcing member has a structure that is provided on the outer surface of the resin film so as to have an opening in the display area of the display panel, the reinforcing plate is attached to the front and back surfaces of the display panel. The display panel can be made thinner than conventional display devices. Therefore, the gap generated at the peripheral edge of the display panel when laminating can be reduced.
Furthermore, the reinforcing member includes a first carbon fiber layer including a plurality of carbon fibers extending in the first direction in a plan view, and a plurality of carbon fibers extending in a second direction intersecting the first direction. It includes a laminated structure with the second carbon fiber layer, and is provided so as to surround the display area of the display panel in a planar manner.
The reinforcing member includes a first carbon fiber layer including a plurality of carbon fibers extending in a first direction, and a second carbon fiber layer including a plurality of carbon fibers extending in a second direction intersecting the first direction. As both layers include a laminated structure, the tensile strength from all directions increases in both directions, and even if bending stress is applied from any direction, the glass substrate is prevented from bending to the limit point (limit radius). can do.
Carbon fiber is a long fiber made from PAN (polyacrylonitrile), pitch, etc., and carbonized with high purity at a high temperature of 1000 ° C. or higher. High tensile strength, low thermal deformation rate (low linear expansion coefficient) And high thermal conductivity. By using CFRP (Carbon Fiber Reinforced Plastics) in which such carbon fibers are combined with a binder resin such as epoxy resin, the tensile strength is higher than that of conventional resin reinforcing plates combined with inorganic particles and glass fibers. Even if bending stress is applied in the extending direction of the carbon fiber in a state where a very thin frame-like reinforcing member such as 50 to 200 μm is attached, the glass substrate is the limit point ( Bending to the limit radius) can be suppressed.
Therefore, according to the electro-optical device according to the application example, sufficient practical strength can be obtained.

  Furthermore, since the reinforcing member including carbon fibers having a thermal conductivity superior to that of the resin has a higher thermal conductivity than the conventional resin-made reinforcing plate, the heat generated by the display panel can be efficiently radiated.

Further, the first carbon fiber layer and the second carbon fiber layer are formed of a prepreg obtained by impregnating carbon fiber with a resin, and the reinforcing member includes three or more layers of the first carbon fiber layer and the second carbon fiber layer. A laminated and cured laminate is preferred.
The reinforcing member is preferably made of invar, titanium, or a titanium alloy.

Moreover, it is preferable that the opening shape of the reinforcing member is provided in the same shape as the display area, and the reinforcing member has a size that covers the end of the display panel in a plan view.
The reinforcing member includes a first reinforcing member provided on the resin film covering the first surface, and a second reinforcing member provided on the resin film covering the second surface. It is preferable.
Moreover, it is preferable that the thickness of a glass substrate is 100 micrometers or less, respectively.

The resin film is preferably a polyethylene copolymer material.
Moreover, the optical film which covers a display area is provided in the opening part of the reinforcement member, and it is preferable that the resin film is an adhesive which bonds a display panel, a reinforcement member, and an optical film.

In addition, the display panel has an overhang region in which one side of one of the pair of glass substrates overhangs the other glass substrate, and one end of the flexible substrate is connected to the overhang region. In addition, it is preferable that one end of the flexible substrate is covered with a resin film, and the other end of the flexible substrate is exposed to the outside from an end portion of the resin film.
The electro-optical layer is preferably an organic EL layer including an organic light emitting layer.

  An electronic apparatus comprising the electro-optical device described above as a display unit.

FIG. 6 is a perspective view illustrating one embodiment of a display device according to Embodiment 1; The side sectional view of the display in the ff section of Drawing 1. The enlarged view of the d section in FIG. The schematic diagram which shows the laminated structure of CFRP. The flowchart figure which shows the flow of the manufacturing method of a display apparatus. The figure which shows the manufacture aspect in each process of (a), (b). Sectional drawing of the display apparatus which concerns on Embodiment 2. FIG. Sectional drawing of the display apparatus which concerns on Embodiment 3. FIG. FIG. 11 is a perspective view illustrating an electronic book as an electronic apparatus. Sectional drawing of the display panel which concerns on the modification 3. FIG. The sectional side view of the conventional display apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the scale of each layer and each part is different from the actual scale so that each layer and each part can be recognized on the drawing.

(Embodiment 1)
"Overview of display device"
FIG. 1 is a perspective view showing an aspect of the display device according to the present embodiment. FIG. 2 is a side sectional view of the display device taken along the line ff of FIG.
First, an overview of the display device 100 as an electro-optical device according to the first embodiment of the invention will be described.

The display device 100 is a flexible organic EL display device having a structure in which a display panel 18 which is a thin organic EL panel is laminated with two resin films 25a and 25b. In the following description, the laminate structure or the laminated display panel 18 is also referred to as a laminate structure 25.
The display panel 18 includes a display region V composed of a plurality of pixels arranged in a matrix. Further, in order to ensure flexibility, the thickness of the pair of substrates constituting the display panel 18 is set to 100 μm or less. In the display area V, red (R), green (G), and blue (B) color pixels are periodically arranged, and a full color image is displayed by display light emitted from each pixel. Note that the display panel is not limited to a display panel that performs color display, and may be a display panel that performs monochrome display. The display area V has a horizontally long rectangle. In each of the drawings including FIG. 1, the horizontal direction is defined as the X-axis direction, and the vertical direction shorter than the horizontal direction is defined as the Y-axis direction. The thickness direction of the display panel 18 is the Z-axis direction. The surface on the display area V side is referred to as a front surface as the first surface, and the opposite surface is referred to as a back surface as the second surface.

Here, on the display region V side of the laminate structure 25, a frame-shaped reinforcing member 28 surrounding the display region V in a plan view is attached. The frame shape is a configuration that covers the display panel 18 so as to have an opening in the display region V. Further, the shape of the opening of the reinforcing member 28 is provided along the outline of the display region V, and the end of the reinforcing member 28 preferably covers the end of the display panel 18. The reinforcing member 28 is a member for reinforcing the thin display panel 18 and is made of a material having excellent tensile strength. For example, it is preferable to use a material containing carbon fiber. In addition, corners R are formed at the four corners of the opening (hole) exposing the display region V.
With such a configuration, the display device 100 has the flexibility that can be bent and the practical strength that the display panel 18 does not break even when bent, as shown by the dotted line in FIG.
As shown in FIG. 2, the display panel 18 includes an element substrate 1 and a CF (color filter) substrate 16, and one end of the element substrate 1 extends from the CF substrate 16 at one end thereof. An overhang region is formed. A flexible substrate 20 is connected to the overhang region. The flexible substrate is an abbreviation for a flexible printed circuit. In addition, a driving IC (Integrated Circuit) 21 is mounted on the flexible substrate 20, and a plurality of terminals for connecting to an external device are formed at the end thereof.

"Detailed configuration of the display panel"
FIG. 3 is an enlarged view of a portion d in the display panel 18 of FIG.
Next, a detailed configuration of the display panel 18 will be described.
The display panel 18 includes an element substrate 1, an element layer 2, a planarizing layer 4, a pixel electrode 6, a partition wall 7, an organic EL layer 8 as an electro-optic layer, a common electrode 9, an electrode protective layer 10, a buffer layer 11, and a gas barrier layer. 12, a filler 13, a CF layer 14, a CF substrate 16, and the like. A portion sandwiched between the element substrate 1 and the CF substrate 16 is referred to as a functional layer 17. In other words, the laminated structure from the element layer 2 to the CF layer 14 is referred to as a functional layer 17.
The element substrate 1 is made of transparent inorganic glass. In this embodiment, alkali-free glass is used as a suitable example.
In the element layer 2, a pixel circuit for actively driving each pixel is formed. The pixel circuit includes a selection transistor for selecting a pixel made of a TFT (Thin Film Transistor), a driving transistor 3 for flowing a current to the organic EL layer 8, and the like, which are formed corresponding to each pixel. Has been.

In the upper layer (Z-axis (−) direction) of the element layer 2, for example, a planarization layer 4 that is an insulating layer made of an acrylic resin or the like is formed.
The reflective layer 5 and the pixel electrode 6 are laminated in this order on the flattening layer 4 so as to be divided for each pixel. The reflection layer 5 is a reflection layer made of, for example, aluminum, and reflects light traveling from the organic EL layer 8 toward the element substrate 1 to make light that contributes to display.
The pixel electrode 6 is composed of a transparent electrode such as ITO (Indium Tin Oxide) or ZnO, and is connected to a drain terminal of the driving transistor 3 of the element layer 2 and a contact hole penetrating the planarization layer 4 for each pixel. ing.
The partition wall 7 is made of a photocurable black resin or the like, and partitions each pixel in a lattice shape in a plane. Note that the pixel circuit including the driving transistor 3 in the element layer 2 is disposed so as to overlap the partition in a planar manner in order to prevent malfunction due to light.

The organic EL layer 8 is formed so as to cover the pixel electrode 6 and the partition wall 7. In FIG. 3, the structure is a single layer. Actually, each layer is composed of a hole transport layer, a light emitting layer, an electron injection layer, and the like made of an organic thin film. Are stacked. The hole transport layer is made of a sublimable material such as aromatic diamine (TPAB2Me-TPD, α-NPD). The light emitting layer is composed of an organic light emitting material thin film composed of a multilayer that emits white light formed by combining three colors of red, green, and blue. The electron injection layer is made of LiF (lithium fluoride) or the like.
The common electrode 9 is a metal thin film layer in which a metal such as MgAg is formed very thin so as to transmit light. Further, a transparent conductive film such as a metal oxide such as ZnO or a metal nitride layer such as TiN may be stacked in order to lower the resistance.

The electrode protective layer 10 is made of a transparent and high-density material such as SiO ₂ , Si ₃ N ₄ , or SiOxNy that has a function of blocking moisture.
The buffer layer 11 is a transparent organic buffer layer such as a thermosetting epoxy resin.
The gas barrier layer 12 is a sealing layer that is transparent, has a high density, and has a function of blocking moisture, such as SiO ₂ , Si ₃ N ₄ , and SiOxNy, and prevents moisture from entering the organic EL layer 8. Take on the function.
The filler 13 is a transparent adhesive layer made of, for example, a thermosetting epoxy resin, and is filled in the uneven surface between the gas barrier layer 12 and the CF layer 14 and adheres both. Further, it also functions to prevent moisture from entering the organic EL layer 8 from the outside.

The CF substrate 16 is made of the same inorganic glass as the element substrate 1, and the CF layer 14 is formed on the organic EL layer 8 side (Z axis (+) side).
In the CF layer 14, a red color filter 14r, a green color filter 14g, and a blue color filter 14b are arranged similarly to the pixel arrangement. Specifically, the color filters of each color are arranged so as to overlap with the corresponding pixel electrodes 6, and light shielding portions indicated by hatching are formed between the color filters. The light shielding portion is formed in a lattice shape so as to overlap the partition wall 7 in a plan view, and optically functions as a black matrix.

From each pixel configured in this manner, display light corresponding to the color tone of the color filter is emitted. For example, in the case of a red pixel, white light emitted from the organic EL layer 8 is selected by the red color filter 14r and emitted from the CF substrate 16 as red display light. The same applies to green and blue pixels.
Thereby, in the display area V, a full-color image is displayed by display light from the plurality of color pixels emitted from the CF substrate 16.
Further, if the reflective layer 5 is eliminated, display can be performed also on the back surface of the display region V. In other words, display can be performed on both the front and back surfaces of the display panel 18.
The configuration of the display panel 18 is not limited to the top emission type, and may be a configuration in which an electro-optical layer is sandwiched between two glass substrates. For example, a bottom emission type organic EL display device that emits light emitted from the organic EL layer 8 from the element substrate 1 side may be used. Moreover, the inorganic EL display device provided with inorganic EL as a light source may be sufficient.

In addition, a flexible substrate 20 is connected to an overhang region in which one side of the element substrate 1 projects from the CF substrate 16. The flexible substrate 20 is a flexible substrate in which a wiring pattern such as a copper foil is formed on a base material of a polyimide film and a driver IC or the like is mounted on the pattern, and is formed on the element substrate 1. Electrical connection is established between the transparent electrode and the like by an anisotropic conductive adhesive film or the like.
Here, since the mechanical strength is insufficient only by the connection with the anisotropic conductive adhesive film, conventionally, the connection portion of the flexible substrate 20 is covered and molded with silicon resin (adhesive) or the like to be reinforced. However, there was a problem of easy peeling.
In this embodiment, sufficient practical strength and flexibility are ensured by making the resin film 25a function as an adhesive (filler) instead of this reinforcing structure. The resin film adhesion method (lamination method) will be described later.

"Material of laminate structure and reinforcing member"
Returning to FIG.
Subsequently, the materials of the resin films 25a and 25b and the reinforcing member 28 constituting the laminate structure 25 will be described.
The resin films 25a and 25b to be laminated are covered with the glass substrate and the reinforcing member 28 so as to cover the entire surface of the display panel 18 including the display area V to the peripheral edge of the display panel 18 from the front and back surfaces. Functions such as water resistance, transparency (light extraction property), moldability of the flexible substrate 20 (insulation and heat resistance), and water resistance to prevent moisture from entering inside are required.
In order to satisfy these functions, the resin films 25a and 25b are preferably made of a resin based on polyethylene having water resistance (low water absorption), insulation, flexibility, transparency, and low-temperature weldability. Moreover, it is more preferable that it is a copolymer partially having a polar group in order to improve adhesiveness.

  Specifically, ethylene-vinyl acetate copolymer (EVA), ethylene-methyl methacrylate copolymer (EMMA), ethylene-hydroxyalkyl methacrylate copolymer, ethylene-alkoxy methacrylate alkoxy are used as polyethylene copolymers. Ethyl copolymer, ethylene-aminoethyl methacrylate copolymer, ethylene-hydroxyglycidyl methacrylate copolymer, ethylene-vinyl alcohol copolymer (EVOH), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid It is preferable to use either an acid copolymer (EMAA) or an ethylene-alkyl acrylate copolymer. Alternatively, a copolymer obtained by combining two or more of these (for example, an ethylene-vinyl acetate-vinyl alcohol copolymer is a copolymer excellent in adhesion between both glass and CFRP), or a mixture is used. There may be.

  Moreover, in order to improve heat resistance, you may contain hardening components, such as amine compounds, such as an epoxy compound, an isocyanate compound, and a polyethyleneimine, as a crosslinking agent. In addition, when using the material which has the carboxyl group which is not esterified among ethylene copolymers, such as ethylene-acrylic acid copolymer (EAA) and ethylene-methacrylic acid copolymer (EMAA), low-temperature weldability However, it is preferable to crosslink with heat in combination with a crosslinking component such as an epoxy-based curing agent so that acrylic acid does not remain.

The reinforcing member 28 has a glass substrate end portion that is easily cracked, a panel warpage prevention by a multilayer structure made of a material having a different linear expansion coefficient, and the glass substrate is prevented from being bent to a limit point (limit radius). Therefore, functions such as toughness (tensile resistance) and heat dissipation for dissipating heat generated by the display panel 18 are required.
In order to satisfy these functions, a material having a high Young's modulus (10 GPa or more), a low linear expansion coefficient (10 ppm / ° C. or less) and a high thermal conductivity (10 W / m · k or more) is preferable.
In this embodiment, as a suitable example, CFRP (Carbon Fiber Reinforced Plastics) having both excellent tensile strength and heat dissipation is used as the material of the reinforcing member 28. Since CFRP has a low density (1.5 to 2.0 g / cm ³ ) and a high tensile strength (1000 MPa or more), high strength reinforcement is possible even if it is made thin, and it is lightweight. It is suitable as a material for the reinforcing member 28.

FIG. 4 is a schematic view showing a laminated structure of CFRP.
CFRP is a composite material composed of carbon fiber and resin, and is a precursor called prepreg in which carbon fiber aligned in one direction is impregnated with thermosetting resin such as epoxy resin or phenol resin, or thermoplastic such as polyester. It is a composite material in which two or more layers (carbon fiber layers) are laminated in different directions and cured.
Specifically, as shown in FIG. 4, a precursor including a plurality of carbon fibers extending in the X-axis direction is a carbon fiber layer h (first carbon fiber layer), and a plurality of precursors extending in the Y-axis direction. When the carbon fiber layer i (second carbon fiber layer) is used as the precursor containing the carbon fiber, four layers of the carbon fiber layer h and the carbon fiber layer i are alternately stacked, and then pressurization and heating (for example, 120 to 180 ° C.) and CFRP cured in a plate shape is used for the reinforcing member 28. In addition, in FIG. 4, the line segment shown by stripe form has shown the extending direction of carbon fiber. Further, although the layers are drawn apart for the sake of clarity, they are actually a laminated body that is bonded (contacted) and integrated.
Further, as the carbon fiber, it is preferable to use a PAN (polyacrylonitrile) -based carbon fiber or a pitch (petroleum resin) -based carbon fiber.

In the present embodiment, CFRP having a four-layer structure is adopted as a suitable example, but it is only necessary to include a laminated structure in which two or more carbon fiber layers having different carbon fiber extending directions are laminated. In other words, what is necessary is just to include the laminated structure which consists of two carbon fiber layers piled up so that the extending direction of each carbon fiber may cross | intersect.
Further, when the X-axis direction is about 0 degrees, the basic structure is a front and back symmetrical stacking order in which the extending direction of the carbon fibers is about 0 degrees, about 90 degrees, about 90 degrees, and about 0 degrees. However, the present invention is not limited to this. For example, the stacking order of about 0 degrees, about 90 degrees, about 0 degrees, about 90 degrees, and the stacking of about 0 degrees, about 0 degrees, about 90 degrees, about 90 degrees It may be in order.
Also, in the case of 3 layers, the stacking order is 0 degree, 90 degrees, 0 degrees, and in the case of 6 layers, it is a front / back symmetrical structure such as 0 degrees, 90 degrees, 0 degrees, 0 degrees, 90 degrees, 0 degrees. The order of lamination is fundamental, but these are not limited as described above.
Even if it is these structures, the expected function as the reinforcement member 28 is securable. Specifically, with respect to the tensile strength, 1000 MPa or more can be secured in substantially all planar directions.
Regarding heat dissipation, carbon fiber made of high-purity carbon is high-purity carbon, so heat conduction is 20 to 60 W / m · k, glass (1 W / m · k) and general-purpose plastic (about 0.5 w / k). Since it is higher than m · k), sufficient heat dissipation can be obtained. Furthermore, the outermost surface of the CFRP may be processed so as to increase the surface area by providing an uneven shape on the surface in order to further increase the heat radiation to the atmosphere.

“About the thickness of each part”
Returning to FIG.
Here, the optimal thickness of each part necessary for the display device 100 to achieve both flexibility and practical strength (toughness) will be described.
First, the thickness of the display panel 18 will be described.
In FIG. 3, in order to clarify the stacking relationship between the constituent parts, in particular, the scale of the functional layer 17 is enlarged as compared with other parts, but in reality, the functional layer 17 is configured to be the thinnest part. become. The thickness of the functional layer 17 is about several μm to 20 μm. Among these, the buffer layer 11 occupies more than half the thickness. Incidentally, the thickness of the organic EL layer 8 composed of a plurality of thin films with a thickness of the order of nm is less than 1 μm. As described with reference to FIG. 3, the display panel 18 is filled with an all-solid substance having no hollow structure between the substrates in order to obtain an adhesive strength that can withstand flexibility.

In this embodiment, as a suitable example, the thickness of the element substrate 1 and the CF substrate 16 is about 40 μm. The total thickness of the display panel 18 is about 90 μm as a preferred example. According to the experiment results of the inventors, in order to ensure the reliability of the organic EL panel, in addition to the sealing structure such as the gas barrier layer 12, the element substrate 1 and the CF substrate 16 must have a thickness of about 10 μm or more. It is understood that. In other words, by setting the thicknesses of the element substrate 1 and the CF substrate 16 to about 10 μm or more, it is possible to ensure impact strength sufficient to withstand flexibility and sufficient moisture resistance.
On the other hand, when the thickness of the element substrate 1 and the CF substrate 16 is about 100 μm or more, it is understood that the flexibility is impaired.
For this reason, it is preferable to set the thickness of the element substrate 1 and the CF substrate 16 within a range of 10 to 100 μm. In consideration of the balance between strength and flexibility, it is more preferable that the thickness be in the range of 20 to 80 μm.
Further, the total thickness of the display panel 18 in which the element substrate 1 and the CF substrate 16 are overlapped is preferably set in a range of 50 to 120 μm in consideration of a balance between strength and flexibility.

  Note that the element substrate 1 and the CF substrate 16 are thinned by polishing or etching each having a thickness of about 0.3 to 0.7 mm in the initial stage. Preferably, after manufacturing a display panel in which the front and back glass substrates are thick, the display panel 18 having a desired thickness is obtained by etching using an etching solution (aqueous solution) in which hydrofluoric acid (hydrofluoric acid) is dissolved. Manufacturing. Note that the present invention is not limited to this method, and any method that can form the display panel 18 having a desired thickness may be used. For example, a mechanical polishing method may be used.

Returning to FIG.
Next, the thickness of the resin films 25a and 25b constituting the laminate structure 25 will be described.
In the present embodiment, as a suitable example, an EVA film having a thickness of about 50 μm is used for the resin films 25a and 25b. According to the experiment results of the inventors, it has been found that a thickness of about 20 μm or more is required to satisfy the coverage (fillability) of the step including the gap at the peripheral edge of the display panel 18.
Considering the balance between the coverage and the total thickness of the display device 100, it is preferably in the range of 20 to 100 μm. Moreover, when the cost of a resin film and the ease (workability | operativity) of lamination are considered, it is preferable to exist in the range of 40-80 micrometers.

Next, the thickness of the reinforcing member 28 will be described.
In this embodiment, as a preferred example, CFRP having a four-layer structure and a thickness of about 100 μm is used for the reinforcing member 28.
The CFRP can be formed as long as it has a thickness of about 25 μm or more. However, the CFRP is flexible and practical in a state of being attached to the laminate structure 25 (including the display panel 18) set to the above-described thickness. In order to ensure strength (toughness), it is necessary to set the thickness within a range of 50 to 200 μm.
The total thickness of the display device 100 formed by laminating these members is about 290 μm at the thickest portion. The peripheral portion of the display panel 18 where the display panel 18 and the reinforcing member 28 overlap is the thickest portion.
Note that the dimensions of the above preferred examples are one of preferred examples derived by the inventors from the experimental results and physical property data after creative ingenuity, and are not limited thereto. Within the range, dimensions can be set according to the application.

"Manufacturing method of display device"
FIG. 5 is a flowchart showing a flow of a manufacturing method of the display device. 6 (a) and 6 (b) are diagrams showing manufacturing modes in each step.
Here, the manufacturing method of the display device 100 will be described in detail along the flowchart of FIG.

In step S1, as shown to Fig.6 (a), it is set as the state which piled up each member (preparation body), and the laminating apparatus. Specifically, the display panel 18, the resin film 25a, and the reinforcing member 28 are overlaid in this order on the resin film 25b. Although not shown in FIG. 6 (a), each member is overlapped using a dedicated guide plate, and planar alignment is also performed. This step is performed in a normal environment as a preferred example, but may be performed in a normal environment described later.
Then, the preparation is set in the laminating apparatus. In FIG. 6A, only the pressure rollers 81 and 82 of the laminating apparatus are shown.

In step S2, the environment in which the laminating apparatus and the preparation body are installed is depressurized to form a depressurized environment. The laminating apparatus is installed in a chamber apparatus (room) that can set the internal environment to a desired atmospheric pressure environment. By this step, air (bubbles) inside the preparation body is removed (defoamed).
Further, in parallel, the pressure rollers 81 and 82 are heated, and the roller surface made of a heat-transferable elastomer is heated to a temperature of 80 to 120 ° C.
In step S3, as shown by the arrow in FIG. 6A, the preparation body is inserted between the pair of pressure rollers 81 and 82 from one side of the preparation body on the opposite side of the flexible substrate 20, and lamination is performed. Is called. In the portion sandwiched between the pressure rollers 81 and 82, the resin films 25a and 25b are dissolved by the heat of the rollers, and are further pressurized and bonded to each other. Further, the dissolved resin film functions as an adhesive (filler), and the display panel 18, the flexible substrate 20, and the reinforcing member 28 are also bonded.
In addition, since the lamination is performed from one side to the other end of the preparation body, even if bubbles (air) remain in each member, the bubbles are pushed out to the other end side in the order of lamination. Then, as shown in FIG. 6B, the laminated display device 100 is pushed out between the pressure rollers 81 and 82 to complete the lamination.

In step S4, an annealing process is performed to remove residual stress in the laminated display device 100. The annealing process may be performed continuously in a reduced pressure environment or in a normal environment. In particular, when the resin films 25a and 25b contain a cross-linking component, it is preferable to perform an annealing treatment at about 100 ° C. to complete the cross-linking.
Note that the laminating apparatus is not limited to a roll laminating system including a pair of pressure rollers 81 and 82, and may be any apparatus that can laminate the prepared body to the completed state of the display device 100. For example, vacuum laminating by a diaphragm method (diaphragm method) in which a preparation body is set on one plate-shaped heating plate (hot plate), a deformed rubber sheet is pressed against the preparation body by a pressure difference, and heated and pressurized. An apparatus may be used.

Returning to FIG.
In this way, the display device 100 having both flexibility and practical strength (toughness) as shown in FIG. 1 is formed.
Note that the configuration is not limited to the configuration in which the reinforcing member 28 is attached to the display region V side (front surface), and may be a configuration in which the reinforcing member 28 is attached to the opposite side (back surface) of the display region V. In other words, a structure in which the reinforcing member 28 is provided on one outer surface of the resin films 25a and 25b may be employed. Even with this configuration, the same reinforcing effect can be obtained.

As described above, according to the display device 100 and the manufacturing method according to the present embodiment, the following effects can be obtained.
According to the display device 100, the frame-shaped reinforcing member 28 made of CFRP is provided in a plane surrounding the display region V on the laminate structure 25 set to a thickness that ensures flexibility. Since the tensile strength of the carbon fiber contained in the CFRP is higher than that of a conventional resin reinforcing plate, even if a bending stress is applied in the extending direction of the carbon fiber with the reinforcing member 28 attached, It is possible to suppress the glass substrate from bending to a limit point (limit radius) without impairing flexibility.
Furthermore, since the reinforcing member 28 includes a laminated structure in which two or more carbon fiber layers having different extending directions of the carbon fibers are laminated, the tensile strength from all directions is enhanced by both of them, and from which direction Even if bending stress is applied, the glass substrate can be prevented from bending to the limit point (limit radius).
This is due to the characteristic of carbon fibers that the elongation due to high tensile strength is extremely small and that the dimensional change is very small by laminating the fibers diagonally. Due to this characteristic, the reinforcing member 28 can be prevented from being deformed when bent to some extent even when stress is applied, and the glass substrate can be prevented from bending to a limit point (limit radius). Further, the reinforcing member 28 also has a function of deformation restraint and restoration that restores the original shape like a spring.

In addition, CFRP containing carbon fiber has a very low linear expansion coefficient of 1 ppm / ° C. or less, and therefore does not generate warp even when bonded by thermocompression bonding at about 100 ° C., which is as high as 4 ppm / ° C. of glass. Because it is close, it is very resistant to thermal shock as a panel.
In addition, since the corners R are formed at the four corners of the opening (hole) of the reinforcing member 28, the occurrence of cracks when bending stress is applied is suppressed as compared to the case where the four corners are edges. can do. For example, the corner R is formed with a radius of about 1 mm.
Accordingly, it is possible to provide the display device 100 that has both flexibility and practical strength (toughness).

Further, unlike the conventional display device (FIG. 11) in which the reinforcing plates (91, 92) are respectively attached to the front and back surfaces of the display panel, the reinforcing member 28 is attached to the front surface of the laminate structure 25 as shown in FIG. Since the structure is provided on any one of the back surfaces, the display panel 18 can be thinned. Thereby, since the shape followability of the resin film at the time of lamination becomes good, generation | occurrence | production of the clearance gap to the peripheral part of the display panel 18 can be reduced (prevented).
In particular, according to the results of experiments by the inventors, in a preferred example in which the thickness of the display panel 18 is approximately 90 μm and the thickness of the resin films 25a and 25b is approximately 50 μm, Generation of a gap was not recognized.
Further, as shown in FIG. 1, when the reinforcing member 28 is provided on the display region V side (front surface), the reinforcing member 28 is black, so that the display region V is partitioned by the member and as a parting edge to make it stand out. Can also work.
Further, since the reinforcing member 28 has a higher thermal conductivity than the resin and is attached in a state where one surface is in contact with the outside air on either the front or back surface of the laminate structure 25, the heat generation of the display panel 18 is efficiently performed. It can dissipate heat well. Therefore, deterioration due to heat generation of the display panel 18 can be suppressed.
Therefore, it is possible to provide the display device 100 having both flexibility, practical strength (toughness), and heat dissipation.

In addition, unlike the conventional reinforcing structure in which the connecting portion of the flexible substrate 20 is covered and molded with silicon resin (adhesive) or the like, the reinforcing structure is also used by laminating with the resin films 25a and 25b. , Production efficiency is good. Further, since the connection portion and the display panel 18 are bonded (filled) with the same resin, sufficient practical strength (toughness) can be ensured without impairing flexibility.
Furthermore, since the polyethylene-based adhesive layer used for the resin films 25a and 25b is excellent in insulation, water resistance, and heat resistance, sufficient electrical reliability can be ensured.

In addition, in the manufacturing method, the polyethylene-based adhesive layer has almost no initial tackiness at room temperature as seen in the acrylic adhesive layer, so that not only air bubbles are easily removed, but also in the state of a pre-stacked preparation. Positioning can be done easily. Therefore, since a multilayer structure can be formed by a single heat lamination in a reduced pressure atmosphere, manufacturing efficiency is good. Moreover, it is excellent in mass productivity.
Furthermore, since the polyethylene-based adhesive layer has almost no initial adhesion at room temperature, there is little sticking of foreign matter, and even if foreign matter is attached, it can be easily removed. Further, even when there is a foreign matter, when softened by heating, if the foreign matter is small, it is embedded in the adhesive layer, so that defects due to foreign matter contamination can be suppressed as compared with a commonly used acrylic adhesive layer. Moreover, since polyethylene-type resin is general purpose resin, member cost can be held down.

(Embodiment 2)
FIG. 7 is a cross-sectional view of the display device according to the second embodiment, and corresponds to FIG.
Hereinafter, the display device 110 according to Embodiment 2 of the present invention will be described. In addition, about the component same as Embodiment 1, the same number is attached | subjected and the overlapping description is abbreviate | omitted.
The display device 110 according to the present embodiment has a configuration in which an optical film 35 and a reinforcing member 29 on the back surface are added to the display device 100 according to the first embodiment. Other than that, it is substantially the same as the description in the first embodiment.

The display device 110 includes a similar frame-shaped reinforcing member 29 on the back surface of the laminated structure 25 in addition to the reinforcing member 28 on the surface of the laminated structure 25. The reinforcing member 29 is the same member as the reinforcing member 28.
An optical film 35 that covers the display region V is attached to the opening (hole) of the reinforcing member 28 on the surface.
The optical film 35 is provided for the purpose of reinforcing the strength, protecting the display surface, improving display visibility, and the like.
In the present embodiment, as a suitable example, PET (polyethylene terephthalate) having excellent transparency is used for the optical film 35. Further, an antireflection layer (AR) having a multilayer structure of inorganic oxides having different refractive indexes is formed on the surface, thereby improving display visibility.

The material of the optical film 35 is not limited to PET, and any material having transparency may be used. For example, PEN (polyethylene naphthalate), TAC (triacetyl cellulose), COP (cyclic olefin polymer) or the like is used.
The surface treatment of the optical film 35 is not limited to the antireflection treatment, and various treatments can be performed. For example, a hard coat process for improving wear resistance by forming a hard coat layer such as PMMA, an antireflection process for forming a low antireflective layer (LR) made of a low refractive index fluororesin, and providing unevenness on the surface Surface treatments such as anti-glare treatment, antistatic treatment for forming an antistatic layer to prevent adhesion of dust, and oil repellent treatment for forming an oil repellent layer to which sebum hardly adheres may be performed.

Moreover, the thickness of the optical film 35 is about 20-50 micrometers as a suitable example. This is because a general transparent resin including PET has a large linear expansion coefficient (20 to 80 ppm / ° C.), expands due to heating at the time of laminating, and shrinks when it returns to room temperature. There is. Therefore, if the optical film is made as thin as possible, the shape retaining force of the CFRP that is the reinforcing member becomes superior. Therefore, the optical film is less likely to shrink even when the temperature is returned to room temperature, and the panel is prevented from warping. However, in the case of an optical film having a thickness of 20 μm or less, surface coating processing such as a hard coat layer or an antireflection layer becomes difficult, so 20 to 50 μm is preferable. This thickness depends on the thickness of the reinforcing member, and it is necessary to make the optical film thinner than the reinforcing member. For example, if the thickness of the reinforcing member is about 200 μm, the thickness of the optical film is preferably in the range of 20 to 100 μm.
Moreover, it is good also as a structure which makes the size of the planar optical film 35 one size larger than the display area V, and overlaps the reinforcement member 28 on the peripheral part of the said film (refer FIG. 8). According to this configuration, the workability at the time of setting the optical film 35 can be improved.

In the above description, the thicknesses of the reinforcing member 28 and the reinforcing member 29 are both assumed to be about 100 μm of the four-layer structure of the carbon fiber layer, but are not limited to this thickness.
Since the display device 110 has a configuration in which reinforcing members are arranged on the front and back sides, a sufficient practical strength can be ensured even if each thickness is slightly reduced. Therefore, for example, the thickness of both the reinforcing member 28 and the reinforcing member 29 may be about 75 μm of the three-layer structure of the carbon fiber layers. In this case, in order to prevent warping of the panel after lamination, the thickness of the optical film 35 is preferably set in the range of 20 to 50 μm.
In addition, the thickness of the reinforcing members 28 and 29 may be made thinner than 75 μm as long as it includes a laminated structure in which two or more carbon fiber layers having different extending directions of carbon fibers are included. Further, the thickness of the reinforcing member 28 and the thickness of the reinforcing member 29 may be set to different thicknesses.

As described above, according to the present embodiment, in addition to the effects in the first embodiment, the following effects can be obtained.
According to the display device 110, in addition to the reinforcing member 28 on the surface of the laminated structure 25, a similar frame-shaped reinforcing member 29 is provided on the back surface of the laminated structure 25.
Therefore, even if bending stress is applied from any direction, the glass substrate can be prevented from bending to the limit point (limit radius). In particular, since the peripheral portion of the display panel 18 that is most likely to crack is wrapped from the front and back surfaces by the two reinforcing members, the display panel 18 can be more reliably prevented from cracking.
Therefore, the display device 110 having both flexibility and practical strength (toughness) can be provided.

Furthermore, the heat generated by the display panel 18 can be efficiently radiated by the two reinforcing members on the front and back surfaces.
Accordingly, it is possible to provide the display device 110 having both flexibility, practical strength (toughness), and heat dissipation.
Further, according to the display device 110, the optical film 35 covering the display region V is attached to the opening (hole) of the reinforcing member 28 on the surface.
Therefore, the display surface can be protected and the toughness can be improved. Moreover, display visibility can be improved.

(Embodiment 3)
FIG. 8 is a cross-sectional view of the display device according to the third embodiment and corresponds to FIG.
Hereinafter, the display device 120 according to the third embodiment of the present invention will be described. In addition, about the component same as Embodiment 2, the same number is attached | subjected and the overlapping description is abbreviate | omitted.
The display device 120 of the present embodiment is different from the display device 110 of the second embodiment only in the configuration of the reinforcing member on the back surface. Specifically, a flat reinforcing member 30 having no opening (hole) is provided on the back surface of the laminate structure 25. Further, a configuration is adopted in which the size of the planar optical film 35 is made slightly larger than the display area V, and the reinforcing member 38 is overlaid on the peripheral edge of the film. Other than that, it is the same as the description in the second embodiment.

In addition to the reinforcing member 28 on the surface of the laminate structure 25, the display device 120 includes a flat plate-like reinforcing member 30 in which no opening (hole) is formed on the back surface of the laminate structure 25. The reinforcing member 30 is a plain plate having a thickness of about 100 μm made of CFRP having a four-layer structure of carbon fiber layers formed in substantially the same plane size as the resin film 25b.
In addition, although the thickness of both the reinforcing member 28 and the reinforcing member 29 has been described as about 70 μm of the carbon fiber layer 4 layer configuration, it is not limited to this thickness, as in the description in the second embodiment, If it includes a laminated structure in which two or more carbon fiber layers having different extending directions of carbon fibers are included, the thickness may be further reduced.
Moreover, the size of the optical film 35 is made slightly larger than the display area V, and the reinforcing member 28 is stacked on the peripheral edge of the film, so that the workability at the time of attachment can be improved. . Specifically, as shown in FIG. 7, it takes skill to set the thin optical film 35 so that the thin optical film 35 is fitted into the opening of the reinforcing member 28. However, according to the above configuration, the alignment is simplified.

As described above, according to the present embodiment, in addition to the effects in the second embodiment, the following effects can be obtained.
According to the display device 120, in addition to the reinforcing member 28 on the front surface, the flat reinforcing member 30 having an opening (hole) on the back surface is provided. Therefore, the heat generated by the display panel 18 can be efficiently radiated by the two reinforcing members on the front and back surfaces. In particular, since the reinforcing member 30 on the back surface covers the entire surface of the display panel 18 including the display region V in a planar manner, heat released from the display region V during display driving can be efficiently radiated.
Therefore, the display device 120 having both flexibility, practical strength (toughness), and heat dissipation can be provided.

(Electronics)
9A and 9B are perspective views illustrating an electronic book on which the above-described display device is mounted, in which FIG. 9A is a perspective view of a display device that forms a page, and FIG. 9B is a perspective view of the electronic book.
The display device 100 described above can be used by being mounted on an electronic book 150 as an electronic device, for example. In addition, you may replace the display apparatus 100 with the display apparatus in each embodiment and a modification.

FIG. 9A shows the display device 100 of FIG. 1 arranged so that the display region V is vertically long. Further, binding holes 41 and 42 are formed at both ends of the reinforcing member 28 on the flexible substrate 20 side in order to bind the electronic book.
As shown in FIG. 9B, the electronic book 150 includes a main body 50, a hinge part 51, rings 52 and 53, a circuit part 54, an operation part 55, and the like.
The main body 50 is a file (binder) and includes front and back mount portions that are openable and closable.
The hinge portion 51 is disposed at a joint portion between the front and back mount portions and includes rings 52 and 53. Moreover, the hinge part 51 is formed so that opening and closing is possible, and the rings 52 and 53 are also opened and closed in synchronization with the opening and closing.

When the hinge portion 51 is opened, the rings 52 and 53 are also opened. In this state, the ring is passed through the binding holes 41 and 42 and the display device 100 is bound into the electronic book 150. At this time, the three flexible boards 20 are inserted into connectors formed inside the hinge portion 51. The connector is connected to the circuit unit 54. And the hinge part 51 is closed. FIG. 9B shows a state in which the display device 100 is bound in the electronic book 150 in this way. Further, a plurality of display devices 100 can be bound.
In addition, an operation unit 55 including a touch panel is provided on the front mount portion, and a desired image can be displayed on the display device 100 by touching the operation unit 55 with an operation pen 57 or a finger. .
The circuit unit 54 disposed inside the hinge unit 51 includes a rechargeable power source unit such as a lithium ion battery, an image processing unit that generates image data to be supplied to the display device 100, and various display modes by the electronic book 150. A storage unit that stores programs and data that define the control unit, a control unit that controls each unit according to the program and data, or the operation content to the operation unit 55, an interface unit that receives an image signal by connecting to an external device, etc. It is included.

For example, when the display device 100 is turned as in the case of reading a book by turning an operation by setting the operation unit 55, continuous page images may be displayed on the display device 100 that is sequentially opened. it can. Further, in this display mode, the closed (overlapped) display device 100 is in an off state and suppresses power consumption. Furthermore, if the display device 100 in which the reflective layer 5 is removed from the configuration of the display panel 18 (FIG. 3) is used, display on the front and back surfaces of one page (display device 100) is possible, and thus the usability can be further improved. it can. Since the display device 100 having flexibility is used for each page of the electronic book 150, images and sentences can be smoothly enjoyed while turning the page like a book. Further, since the display device 100 has sufficient practical strength (toughness), it can be handled in the same manner as a normal book.
Therefore, the electronic book 150 that can be handled in the same manner as a normal book can be provided.

  Further, the electronic device is not limited to the electronic book 150 and may be an electronic device provided with a display unit. For example, a mobile phone may be used. Specifically, it may be an integrated mobile phone, a foldable mobile phone, or a slide mobile phone. Alternatively, it can be used in various electronic devices such as a display device for a car navigation system, a PDA (Personal Digital Assistants), a mobile computer, a digital camera, a digital video camera, an in-vehicle device, and an audio device. Moreover, it can also be used as a lighting device for mobile objects such as automobiles, railways, and airplanes having curved walls by taking advantage of the flexibility and measures to prevent glass scattering during an accident.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be added to the above-described embodiment. A modification will be described below.

(Modification 1)
This will be described with reference to FIG.
In each of the above embodiments, the display panel 18 has been described as having a configuration in which a color filter that emits white light in common to all pixels and selectively transmits each color light of RGB from white light is provided on the display surface side. However, the present invention is not limited to this. Any color pixel may be used as long as it can emit RGB color light.
For example, a display panel having a configuration using a so-called three-color coating method in which a light emitting layer of each color of RGB is formed for each color pixel of RGB in the organic EL layer 8 may be used.
Further, in each of the above embodiments, the display device 100 has been described as an active matrix type, but may be a passive (simple) matrix type.
In this case, the element layer 2 becomes unnecessary, and the organic EL layer 8 is sandwiched between the scan electrode and the data electrode. For example, the scan electrode is formed on the element substrate 1 side, and the data electrode is formed on the CF substrate 16 side. The scan electrodes and the data electrodes are formed so as to extend in the intersecting directions so as to have a lattice shape in plan view.
Even if it is these structures, the effect similar to said each embodiment can be acquired.

(Modification 2)
This will be described with reference to FIG.
In each of the embodiments described above, CFRP containing carbon fiber is used as the reinforcing member 28. However, the present invention is not limited to this. Any material having similar physical properties may be used. The same applies to the reinforcing member 29 of the second embodiment and the reinforcing member 30 of the third embodiment.
For example, the reinforcing member 28 may be configured using invar (an iron alloy having a Ni content of 30 to 50%), titanium, a titanium alloy, or the like having low thermal deformability (low linear expansion coefficient) close to CFRP. good.
Further, for example, in the configuration of FIG. 8, these materials are used in combination such that the frame-shaped reinforcing member 28 uses invar with excellent workability and the plate-shaped reinforcing member 30 uses CFRP. Also good.
Even if it is these structures, the effect similar to said each embodiment can be acquired.

(Modification 3)
FIG. 10 is a cross-sectional view of a display panel according to Modification Example 3, and corresponds to FIG.
In each said embodiment, although the display panel 18 demonstrated as what is an organic electroluminescent panel, it is not limited to this. Any thin display panel in which an electro-optic layer is sandwiched between a pair of substrates may be used. For example, an electrophoretic panel including an electrophoretic layer may be used as the electro-optical layer.
Hereinafter, the display panel 68 according to Modification 3 will be described. In addition, about the component same as FIG. 3, the same number is attached | subjected and the overlapping description is abbreviate | omitted.
The display panel 68 of the present embodiment is a reflective electrophoretic panel provided with an electrophoretic layer 67 as an electro-optical layer.

The display panel 68 has a configuration in which an electrophoretic layer 67 is sandwiched between the element substrate 1 and the counter substrate 65. Further, the laminated structure from the element substrate 1 to the pixel electrode 6 is the same as the configuration of FIG.
The counter substrate 65 is a transparent substrate made of, for example, glass or plastic. On the element substrate 1 side of the counter substrate 65, a counter electrode 64 is formed on the entire surface (solid shape) so as to face the plurality of pixel electrodes 6. The counter electrode 64 is made of a transparent conductive material such as ITO.
The electrophoretic layer 67 includes a plurality of microcapsules 70, a binder 62 that holds the plurality of microcapsules 70, and an adhesive layer 61. The display panel 68 includes an electrophoretic sheet in which an electrophoretic layer 67 is fixed to the counter substrate 65 side in advance by a binder 62, and the element substrate 1 on which the pixel electrode 6 and the like are formed separately from the sheet. Are formed by adhering with an adhesive layer 61.

One or a plurality of microcapsules 70 are sandwiched between the pixel electrode 6 and the counter electrode 64, and are arranged in one pixel (in other words, with respect to one pixel electrode 6).
As shown in the enlarged view in the upper right of FIG. 10, the microcapsule 70 has a configuration in which a dispersion medium 71, a plurality of white particles 72, and a plurality of black particles 73 are enclosed in a coating 75. The microcapsule 70 is formed in a spherical shape having a particle size of about 50 μm, for example.
The coating 75 is made of a polymer resin having translucency such as acrylic resin, urea resin, gum arabic, and gelatin.
The dispersion medium 71 is a medium for dispersing the white particles 72 and the black particles 73 in the microcapsules 70 (in other words, in the coating film 75).

The white particles 72 are particles (polymer or colloid) made of a white pigment such as titanium dioxide, zinc white (zinc oxide), or antimony trioxide, and are negatively charged, for example.
The black particles 73 are particles (polymer or colloid) made of a black pigment such as aniline black or carbon black, and are positively charged, for example.
As a result, the white particles 72 and the black particles 73 move in the dispersion medium 71 due to the electric field (potential difference) generated by the potential difference between the pixel electrode 6 and the counter electrode 64, so that the particles gathered on the counter electrode 64 side. The color tone will be displayed.
In addition, color display of red, green, blue, etc. can also be performed by changing the pigment used for the white particle 72 and the black particle 73 to pigments, such as red, green, and blue, for example.
In addition, the present invention is not limited to the above-described microcapsule method, and an electropowder fluid type electrophoretic panel that controls display switching / on / off by switching between plus and minus by putting a charged electropowder fluid in a pixel. It may be. Alternatively, an electrophoretic panel using cholesteric liquid crystal may be used.
Even if it is these structures, the effect similar to said each embodiment can be acquired.

  DESCRIPTION OF SYMBOLS 1 ... Element board | substrate, 8 ... Organic electroluminescent layer as an electro-optic layer, 16 ... CF board | substrate, 18 ... Display panel, 20 ... Flexible substrate, 25a, 25b ... Resin film, 28 ... Reinforcing member as a 1st reinforcement member, 29 , 30 ... a reinforcing member as a second reinforcing member, 100, 110, 120 ... a display device as an electro-optical device, 150 ... an electronic book as an electronic device, h ... a carbon fiber layer as a first carbon fiber layer, i ... Carbon fiber layer as the second carbon fiber layer, V... Display area.

Claims (12)

A display panel having an electro-optic layer sandwiched between a pair of glass substrates;
A resin film laminated so as to cover the first surface on the display area side of the display panel and the second surface opposite to the first surface;
A reinforcing member is provided on at least the resin film covering the first surface,
The electro-optical device, wherein the reinforcing member is formed to have an opening in a display area of the display panel.   The reinforcing member includes a first carbon fiber layer including a plurality of carbon fibers extending in a first direction in a plane and a plurality of carbon fibers extending in a second direction intersecting the first direction. The electro-optical device according to claim 1, comprising a laminated structure including a second carbon fiber layer. The first carbon fiber layer and the second carbon fiber layer are formed of a prepreg obtained by impregnating carbon fiber with a resin,
3. The electro-optical device according to claim 2, wherein the reinforcing member is a laminated body in which three or more layers of the first carbon fiber layer and the second carbon fiber layer are laminated and cured.   The electro-optical device according to claim 1, wherein the reinforcing member is made of invar, titanium, or a titanium alloy. The opening shape of the reinforcing member is provided in the same shape as the display area,
5. The electro-optical device according to claim 1, wherein the reinforcing member is large enough to cover the end of the display panel in a planar manner.   The reinforcing member includes: a first reinforcing member provided on the resin film covering the first surface; and a second reinforcing member provided on the resin film covering the second surface; The electro-optical device according to claim 1, further comprising:   The electro-optical device according to claim 1, wherein each of the glass substrates has a thickness of 100 μm or less.   The electro-optical device according to claim 1, wherein the resin film is a polyethylene copolymer material. The opening of the reinforcing member is provided with an optical film that covers the display area,
The electro-optical device according to claim 1, wherein the resin film is an adhesive that bonds the display panel, the reinforcing member, and the optical film. In the display panel, an extended region in which one side of the glass substrate out of the pair of glass substrates protrudes from the other glass substrate is formed,
One end of a flexible substrate is connected to the overhang region,
The one end of the flexible substrate is covered with the resin film, and the other end of the flexible substrate is exposed to the outside from the end of the resin film. The electro-optical device according to Item.   The electro-optical device according to claim 1, wherein the electro-optical layer is an organic EL layer including an organic light emitting layer.   An electronic apparatus comprising the electro-optical device according to claim 1 as a display unit.

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