JP2011047977A - Electrooptical device, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrooptical device suitable for tiling system by achieving narrowing of a frame. <P>SOLUTION: The thickness of each of two glass substrates constituting a display panel 18 is set to ≤50 μm while microcracks are not caused at a periphery, so that the display panel can be bent at an almost right angle. The display panel 18 is fixed to a side of a supporting frame 50 by bending frame areas F on respective sides to the supporting frame 50 side from the vicinity of the periphery of a display area V while the back side of the display area V is supported on a surface of the supporting frame 50. Namely, the frame area F is bent to the supporting frame 50 side, thereby the length in terms of plane of the frame area is shortened. Furthermore, all the frame areas F on the four sides are constituted to be bent, thereby the display panel is suitable for the tiling system. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

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

Organic EL (Electro Luminescence) display devices, which are self-luminous devices, are easier to make thinner than liquid crystal display devices that require lighting devices such as backlights. Has been proposed.
For example, Patent Document 1 proposes an organic EL display device in which an organic EL layer is sandwiched between two glass substrates thinned to 100 μm or less. According to the display device, since the organic EL layer is sandwiched between two glass substrates having excellent barrier properties, moisture can be prevented from entering the organic EL layer and durability can be improved. It is said. Further, the glass substrate can be made flexible by making it thinner.

  Similarly, Patent Document 2 discloses a liquid crystal display device in which a glass substrate is thinned to realize flexibility. According to this document, when a thin liquid crystal display device is bound and used in a notebook or notebook, even if an external force such as dropping or bending is applied, the external force can be released by utilizing flexibility. It is possible to prevent fatal damage such as cracks. In addition, the flexibility of the liquid crystal display device is presumed to be flexible enough to make the whole from the description and the form of the drawings.

In such a display device, a driving circuit for driving a plurality of pixels formed in the display area and wirings are formed in a peripheral portion of the display area, that is, a so-called frame area.
In the case of an organic EL display device, in order to prevent moisture from entering from the peripheral edge of the glass substrate, the frame region is lengthened and the sealant is sufficiently filled. In other words, the frame region also functions as a barrier layer to ensure reliability (lifetime).
On the other hand, narrowing of the picture frame has been sought as market needs. This is because, in an electronic device in which a display device is incorporated, if the frame area is long, the planar size of the electronic device increases accordingly. There is also a need for a display device that can accommodate a so-called tiling method, in which a plurality of display devices with narrowed frames are arranged to achieve a desired aspect ratio and size.

JP 2005-19082 A Japanese Patent No. 4131639

However, the conventional display device has a problem that it is difficult to realize a narrow frame. Specifically, there is a trade-off between narrowing the frame and ensuring reliability, and it is difficult to ensure reliability if the frame area is shortened, while on the other hand, if the length of a certain frame area is secured, it will not become a narrow frame. There was a problem. In other words, the conventional display device has a problem that it is difficult to achieve both reliability and narrowing of the frame. Further, even if the display device has flexibility, the frame area does not become shorter by that, so it is still difficult to realize a narrow frame.
In addition, if the frame area is long, the frame area becomes an obstacle even when tiling is performed, and it is difficult to realize seamless display, and it is difficult to obtain sufficient display quality. In other words, there has been a problem that a display device corresponding to a tiling method capable of realizing a display in which joints are suppressed has not been proposed.
Further, even if the display device is flexible enough to bend the entire display device as disclosed in Patent Document 2, it can only be used for binding to a notebook or a notebook, and is flexible. It was hard to say that it was fully utilized. In other words, the conventional display device merely adds flexibility to the thin display device, and does not propose a new application because it has flexibility.
That is, there is a problem that an effective use due to flexibility is not found.

  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 display panel formed by forming an electro-optic layer including a display region in which a plurality of pixels are formed on a glass substrate having a thickness of 50 μm or less, and a planar size substantially the same as the display region. The display panel has a frame region extending from one side to the outside of the display region for each side of the display region, and each of the frame regions is supported from the vicinity of the periphery of the display region. An electro-optical device that is bent to a side and fixed to a side surface of a support frame.

According to the findings from various experimental results conducted by the inventors, bending near a right angle is realized by setting the thickness of the glass substrate to 50 μm or less in the state where microcracks are not generated in the peripheral portion. I understand that I can do it. In addition, the bending close to the right angle state refers to an aspect that can be regarded as being bent substantially at a right angle macroscopically, although the angle R due to bending exists. Based on this knowledge, this application example has been derived after creative ingenuity, and by utilizing this flexibility (flexibility), a narrow frame is realized and a display device suitable for a tiling method is proposed. Is.
According to this electro-optical device, since the thickness of the glass substrate on which the electro-optical layer is formed is set to 50 μm or less, the display panel can be bent at a substantially right angle.
Each of the frame regions in the display panel is bent toward the support frame from the vicinity of the periphery of the display region, and is fixed to the side surface of the support frame.
That is, since each frame region is bent toward the support frame, the planar length of the frame region is shortened.
Accordingly, it is possible to provide an electro-optical device that realizes a narrow frame.

Further, since the frame region is bent, the length of the frame region can be set to a length necessary for ensuring reliability.
Therefore, it is possible to provide an electro-optical device capable of ensuring both reliability and narrowing the frame.
Further, by providing the display panel with a flexibility that allows the display panel to be bent substantially at a right angle, it is possible to realize a narrow frame with high market needs.
Therefore, it is possible to propose an effective use of the electro-optical device by having flexibility. In other words, it is possible to provide an electro-optical device that realizes a narrow frame using flexibility.
Furthermore, by realizing a narrow frame, it is possible to realize a seamless display when tiling. Therefore, it is possible to provide a display device suitable for a tiling method that can obtain a sufficient display quality with suppressed seams.

Moreover, it is preferable that the support frame and the display area are formed with substantially the same area in plan view.
The support frame is a metal plate-like member, and preferably has a thickness of 2 mm or more.
A first adhesive layer for fixing the display panel is disposed on the surface of the support frame on the display panel side, and a second adhesive layer for fixing the frame region is disposed on the side surface of the support frame. It is preferable that
Moreover, it is preferable that the notch part which has a predetermined curvature is formed in the bent part of the frame area | region.
Moreover, it is preferable to further include a tape member or a bezel that presses a portion bent to the side surface of the support frame from the outside.

The display panel includes a display panel formed by forming an electro-optic layer including a display region in which a plurality of pixels are formed on a glass substrate having a thickness of 50 μm or less, and a support frame that supports the display panel. Each frame region has a frame region extending from one side to the outside of the display region, and when the display panel side surface of the support frame is the front surface and the surface opposite to the front surface is the back surface, each of the frame regions is The electro-optical device is folded back from the vicinity of the peripheral edge of the display area to the back side of the support frame.
In addition, a first adhesive layer for adhering and supporting the display panel is provided on the front surface of the support frame, and a third adhesive layer for adhering one folded side is provided on the back surface. The bending radius of the glass substrate in the portion is preferably substantially the same radius as half the thickness of the support frame plus the thickness of the first adhesive layer and the third adhesive layer.

When the glass substrate is the first substrate, the display panel further includes a second substrate made of a glass substrate having substantially the same thickness as the first substrate, and the electro-optic layer includes the first substrate and the second substrate. It is preferable that it is pinched | interposed between.
Further, it is preferable to further include a resin film that covers and laminates the display panel from the first substrate side and the second substrate side.
In addition, a pixel circuit including a driving circuit for displaying and driving a plurality of pixels is formed in the frame area of the display panel, and a pixel and a pixel are included in a bent portion or a bent portion. It is preferable that a wiring portion for connecting the circuit is formed.
Moreover, it is preferable that the length of the frame region to be folded or folded is secured to 2 mm or more.
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.
An electronic apparatus comprising a plurality of electro-optical devices as described above and a display unit on which tiling of the plurality of electro-optical devices is provided.
An electronic apparatus including a plurality of the electro-optical devices described above, wherein a first electro-optical device having a bezel disposed on an upper side which is a display panel side on a side surface, and a bezel disposed on a lower side opposite to the upper side on the side surface A plurality of second electro-optical devices, and when the first electro-optical device and the second electro-optical device are arranged, the bezels are arranged so as not to overlap in the plane direction. An electronic apparatus comprising a display unit in which tiling is arranged so that an optical device and a second electro-optical device are alternately arranged.

(A) The top view which shows the one aspect | mode of the display apparatus which concerns on Embodiment 1, (b) is a sectional side view in the ee cross section of (a), (c) is the enlarged view of the i section in (b). The top view of a display panel. The side sectional view in the jj section of FIG. The graph which showed correlation with the thickness of a glass substrate, and permissible bending radius (R). The perspective view which shows the one aspect | mode of the 1st multi-display apparatus as an electronic device. (A) The top view which shows the one aspect | mode of the display apparatus which concerns on Embodiment 2, (b) The rear view. The top view of a display panel. (A) is a sectional side view in the s-s section of Fig.6 (a), (b) is an enlarged view of the l section in (a). (A) The top view which shows the one aspect | mode of the display panel which concerns on Embodiment 3, (b) The manufacture aspect figure of a lamination process. (A) Side sectional drawing in the nn cross section of Fig.9 (a), (b) Action | operation explanatory drawing of a laminate structure. The top view which shows the vehicle-mounted meter as an electronic device. (A) The perspective view which shows the one aspect | mode of the 2nd multi-display apparatus as an electronic device, (b) The side sectional view of a display apparatus, (c) is the sectional side view in the qq cross section of (a). FIG. 6 is a side sectional view of a display panel according to Modification Example 1. FIG. 10 is a side sectional view of a display panel according to Modification 3. (A) A plan view of a display panel according to Modification 4 and a tiling aspect diagram of a display device including the display panel; (b) a plan view of a display panel having a different form; and a display device including the display panel Tiling aspect diagram.

  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. 1A is a plan view showing one mode of a display device according to the present embodiment, and FIG. 1B is a side cross-sectional view taken along the line ee of FIG. FIG.1 (c) is an enlarged view of the i section in (b).
First, an outline of the display device 100 as an electro-optical device according to Embodiment 1 of the present invention will be described.

The display device 100 is an organic EL display device, and includes a support frame 50 and a display panel 18 set on the support frame. The display panel 18 is an organic EL panel in which an organic EL layer is sandwiched between a pair of sufficiently thin glass substrates, and has a flexibility that can be bent almost at a right angle. The thickness and flexibility of the glass substrate will be described later.
The display panel 18 includes a display region V composed of a plurality of pixels arranged in a matrix. 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 region V has a substantially square shape as a preferred example, and the vertical direction of the paper surface when viewed directly in FIG. 1A is defined as the Y-axis direction and the horizontal direction is defined as the X-axis direction. Note that the shape is not limited to a square, and may be any shape that can be arranged with substantially no gap when the display areas V are arranged next to each other, such as a rectangle.
The thickness direction of the display panel 18 is the Z-axis direction. Further, the Y-axis (+) and (−) directions are defined as the vertical direction, and the X-axis (−) and (+) directions are defined as the horizontal direction.

Here, as shown in FIG. 1A, the outer shape of the display device 100 is substantially the same as the square of the display region V in plan view. Specifically, although the frame area F extends from the respective sides of the display area V by a length k2, the extension length is slight, so that the frame area F is observed in substantially the same manner as the square of the display area V. Yes.
As shown in FIGS. 1B and 1C, this is realized by bending the frame region F on each side of the display panel 18 to the support frame 50 side (Z-axis (+) side). . Specifically, each frame region F is bent from the peripheral edge of the display region V to the Z-axis (+) side for each side, and is fixed to the side surface of the support frame 50 by the adhesive layer 61. The lower frame region F is bent to the side surface of the support frame 50 and then further bent to the back surface of the support frame 50. Here, the bent state is a bent state in which the back surface of the display area V of the display panel 18 is bent at 0 degrees or more with respect to the reference surface in the X-axis direction.
Further, shortening the length of the planar frame region by bending the frame region F in this way is referred to as narrowing the frame.
In this way, by narrowing each side of the frame area F at an angle close to a substantially right angle, the frame around the entire periphery of the display panel 18 can be narrowed. Therefore, the display device 100 is suitable for tiling applications.

"Detailed configuration of the display panel"
FIG. 2 is a plan view of the display panel and corresponds to FIG.
Next, the detailed configuration of the display panel 18 will be described with reference to FIGS. 1 and 2.

FIG. 2 is a plan view of the display panel 18 in a single product state, in which the frame region F is extended on all sides (four sides). In other words, the shape of the flat display panel 18 before being set on the support frame 50 is shown.
The display panel 18 has a configuration in which an element substrate 1 made of a glass substrate and a counter substrate are bonded together, and a frame region that protrudes outside the display region V from each side of the display region V. F is formed. In other words, around the display area V, four rectangular frame areas F each having one side of the display area V are formed. Further, the four corners of the display area V are notched in an L shape so as to partition each frame area F, and the corner of the notch has a predetermined radius of curvature. A corner radius Ra is formed. The corner radius Ra is set to a radius of about 1.0 mm, for example.
In the present embodiment, a frame region F is defined as a portion outside the display region V and where the element substrate 1 and the counter substrate overlap each other.

As shown in FIG. 2, in the initial state, the length of the frame region F on the upper side and the left and right sides is set to be the same with a length k1 on all three sides. Of these, when the left and right sides are bent and the display panel 18 is set on the support frame 50, as shown in FIG. 1A, the planar lengths of the left and right sides are both length k2. . The upper side is similarly the length k2.
In addition, the length of the lower frame region F in the initial state is set to a length k5 that is longer than the length k1. This is because, as described above, the lower frame region F is folded back on the back surface of the support frame 50, and thus is set longer. When the frame area is folded back to the back surface of the support frame 50, the planar length becomes the length k2 as in the other side, as shown in FIG.
In FIG. 2, portions indicated by dot hatches along each side of the display panel 18 are portions that are bent along with bending when being set on the support frame 50, and are set as a bending area m.

In addition, an extended region in which the element substrate 1 extends from the counter substrate is formed at an end portion of the lower frame region F in the lower direction (Y-axis (−) side).
A flexible substrate 20 is connected to the overhang region. The flexible board is an abbreviation for a flexible printed circuit board having flexibility in which an iron foil wiring or the like is formed on a polyimide film base. In addition, a driving IC (Integrated Circuit) 21 is mounted on the flexible substrate 20, and a plurality of terminals 22 for connecting to a dedicated controller or an external device (none of which are shown) are provided at the end of the flexible substrate 20. Is formed.
The display panel 18 displays images, characters, and the like in the display region V by receiving control signals including power and image signals from an external device via the flexible substrate 20.

FIG. 3 is a side sectional view of the display panel 18 of FIG.
The display panel 18 includes an element substrate 1, an element layer 2, a planarization layer 4, a pixel electrode 6, a partition wall 7, an organic EL layer 8, a common electrode 9, an electrode protective layer 10, a buffer layer 11, a gas barrier layer 12, and a filler 13. , CF layer 14, counter substrate 16, and the like. A portion sandwiched between the element substrate 1 and the counter substrate 16 is referred to as a functional layer 17 as an electro-optical layer. 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. The pixel circuit uses low-temperature polysilicon as the active layer as a preferred example, but may have a configuration using amorphous silicon as the active layer.

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.

Electrode protective layer 10, SiO ₂ or, Si ₃ N _4, SiOxNy transparent such, and is configured of a material having a function of blocking water by density.
The buffer layer 11 is a transparent organic buffer layer such as a thermosetting epoxy resin.
The gas barrier layer 12 is a transparent sealing layer such as SiO ₂ , Si ₃ N ₄ , or SiOxNy, and has a function of blocking moisture due to high density, 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 fills the uneven surface between the gas barrier layer 12 and the CF layer 14 and bonds them together. Further, it also functions to prevent moisture from entering the organic EL layer 8 from the outside.

The counter 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.

The counter substrate 16 and the element substrate 1 are bonded and sealed with a sealant 15 formed on the peripheral edge of the counter substrate 16. As the sealant 15, an epoxy adhesive, an ultraviolet curable resin, or the like is used. In other words, the frame region F is filled with the sealing agent 15. Note that the sealant 15 is also filled between the display region V and the four corners Ra in FIG.
Here, the functional layer 17 including the organic EL layer 8 is covered with the element substrate 1 made of a glass substrate having excellent barrier properties and the counter substrate 16 after the surface is covered with an inorganic gas barrier layer 12. Therefore, the barrier property against moisture intrusion from the thickness (Z-axis) direction is high.
On the other hand, the barrier configuration (layer) that prevents moisture permeation from the peripheral edge of the display panel 18 is mainly composed of the sealing agent 15 and the gas barrier layer 12, and therefore has a longer filling length of the sealing agent 15. Can improve the barrier property. In other words, the reliability (life) of the display panel 18 is determined according to the length of the frame area F.

In the frame region F, a shift register used when displaying and driving a plurality of pixels, a circuit portion n including an inspection circuit, a wiring portion connecting the circuit portion and the pixel circuit, and the like are formed. The circuit portion n and the wiring portion are built in the element substrate 1 by the same process as that of the pixel circuit.
Here, in the frame region F on each side, a wiring portion is formed in the curved area m, and a circuit portion n is formed in a region excluding the area. In other words, the circuit part n is formed outside the curved area m where the wiring part is formed.
In FIG. 2, the curved area m extends to the inside of the display area V. Even in the inner peripheral portion of the display area V, the pixel circuit such as the drive transistor 3 is not arranged in the area. It is because it is laid out.

Returning to FIG.
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 counter 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 counter substrate 16.
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.

"Detailed structure of support frame"
Returning to FIG.
Here, the configuration of the support frame 50 will be described with reference to FIG.
The support frame 50 is a plate-like member formed in a planar size, that is, an area substantially the same as that of the display region V, and the surface that supports the display panel 18 is a flat surface. Further, the side surface to which the bent frame region F is attached is formed substantially perpendicularly from the surface. In addition, a chamfering process is performed on the corner from the surface to the side surface.
On the back surface, which is the surface opposite to the front surface, a fitting projection 53 is formed for determining a planar position at the time of tiling.
The projection 53 is a square-shaped projection formed substantially at the center of the back surface in a plan view, and a semicircular shape is formed on the upper side. This semicircular shape is for determining the vertical and horizontal directions of the display device 100 (display panel 18).

The support frame 50 needs functions such as strength to reinforce the sheet-like display panel 18 and heat dissipation properties that absorb heat generated by the display panel 18 and transmit (release) it to the outside.
In the present embodiment, as a suitable example, a machined aluminum plate is used as the support frame 50. Note that the material is not limited to this, and any material having the above-described functions may be used.For example, stainless steel, steel, or an alloy of iron and nickel, which has a low thermal expansion coefficient near room temperature, etc. May be used.
Moreover, it is not limited to a metal, You may form the support frame 50 with resin. As the molding method, an injection molding method or an extrusion molding method can be used.
As a specific resin, a general-purpose resin such as an ABS resin can be used, but from the viewpoint of being thin and tough, it is more preferable to use an engineering plastic such as polycarbonate, polyacetal, or polypropylene terephthalate.
Moreover, when using resin, in order to improve heat dissipation, it is preferable to perform surface treatment, such as plating, sputtering, or heat radiation coating, on the support frame 50. When performing the plating process, for example, two-layer plating of copper and nickel or three-layer plating of copper, nickel and chromium is performed on the entire surface. When performing the sputtering process, at least the surface of the support frame 50 is sputtered with aluminum or nickel. When performing heat radiation coating, at least the surface is coated with a paint containing a heat conductive filler such as aluminum nitride, alumina, or silicon carbide.

"About the dimensions of each part and manufacturing method"
Here, the optimum dimensions of each part necessary for ensuring the reliability of the display device 100 and bending the frame region F 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.

In the present embodiment, as a suitable example, the thickness of the element substrate 1 and the counter substrate 16 is about 30 μm. The total thickness of the display panel 18 is about 70 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 thickness of the element substrate 1 and the counter substrate 16 is required to be about 10 μm or more. It is understood that. In other words, by setting the thicknesses of the element substrate 1 and the counter substrate 16 to about 10 μm or more, sufficient moisture resistance can be ensured.
On the other hand, if the thicknesses of the element substrate 1 and the counter substrate 16 exceed about 50 μm, the allowable bending radius increases, and the degree (effect) of the narrow frame becomes dilute (small).
For this reason, it is preferable to set the thicknesses of the element substrate 1 and the counter substrate 16 within a range of 10 to 50 μm, respectively. Moreover, it is more preferable to set it in the range of 10-30 micrometers. Furthermore, the total thickness of the display panel 18 in which the element substrate 1 and the counter substrate 16 are overlapped is preferably set within a range of 30 to 110 μm.

The element substrate 1 and the counter substrate 16 are thinned by polishing or etching each of which has a thickness of about 0.3 to 0.7 mm in the initial stage. Preferably, after manufacturing a large panel having a plurality of display panels with thick glass substrates on the front and back sides, etching is performed using an etching solution (aqueous solution) in which hydrofluoric acid (hydrofluoric acid) is dissolved. Manufacture large format panels of the desired thickness. Then, the display panel 18 is cut out from the large format panel. 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.
Here, when the display panel 18 is cut out from the large panel, a known cutting method can be used, but it is necessary to prevent microcracks from being generated in the peripheral portion of the display panel 18. This is because the display panel 18 is used in a folded state, so that it is prevented from being broken at the time of bending. For this reason, it is particularly preferable to use a laser scribing method using laser light for cutting the sides in the vicinity of the corner radius Ra at the four corners in FIG. 2, that is, the sides including the curved area m. In addition, after cutting, it is necessary to dissolve at least the end of the curved area m with a solution such as hydrofluoric acid to eliminate the microcracks.
Further, a resin may be coated on the peripheral portion of the display panel 18 in order to protect the end face after cutting. For example, the peripheral edge portion may be coated with an epoxy resin, an acrylic resin, a urethane resin, or a silicon resin by a dipping method.

FIG. 4 is a graph showing the correlation between the glass substrate thickness and the allowable bending radius (R). The horizontal axis indicates the thickness of the glass substrate, and the vertical axis indicates the allowable bending R.
This graph is derived from the results of various experiments conducted by the inventors, and is an important index for realizing a narrow frame. As described above, according to findings from various experimental results conducted by the inventors, it has been found that bending close to a right angle state can be realized by setting the thickness of the glass substrate to 50 μm or less.
On the other hand, even if it is possible to bend at a substantially right angle, if the bend R is too large, it becomes difficult to narrow the frame. For this reason, in the present embodiment, narrowing the frame is realized by setting the dimensions of each part using the allowable bending R as one index.

The allowable bend R is the minimum bend radius (R) allowed when a glass substrate having a predetermined thickness is bent substantially at a right angle. In other words, it is the minimum bending radius (R) that can maintain the bent state without breaking when the glass substrate is bent at a substantially right angle. Further, it has been confirmed that when the glass substrate is folded, that is, when the glass substrate is bent 180 degrees as shown in FIG. 8B, the allowable bending R is substantially equal to the allowable bending R shown in FIG.
As shown in FIG. 4, the thickness of the glass substrate and the allowable bending R are in a substantially direct relationship, and it can be seen that the allowable bending R increases as the thickness of the glass substrate increases. In other words, as the thickness of the glass substrate increases, the degree of narrow frame becomes dilute.
FIG. 4 is a graph when a glass substrate having no microcracks is used. Incidentally, when a glass substrate including microcracks is used, the allowable bending R is extremely large even if the thickness is the same. It has been confirmed that For example, when a glass substrate having a thickness of 30 μm and including microcracks is used, the allowable bending R is about 5.5 mm, and it is difficult to narrow the frame.

In the preferred example described above, the thickness of the glass substrate is 30 μm. In this case, the allowable bending R in one glass substrate is about 0.8 mm. The actual display panel 18 has a structure in which two glass substrates are stacked. However, the allowable bending R in this structure is an allowable value when the thickness is 60 μm according to the results of experiments by the inventors. It has been confirmed that the radius is substantially equal to the allowable bending R in one glass substrate, not the bending R. This is because the main part of the functional layer 17 (FIG. 3) interposed between the two glass substrates is made of a resin such as the sealant 15 and the layer functions as a buffer layer. Yes.
As a result, as shown in FIG. 1C, the right side of the frame region of the display panel 18 is bent toward the support frame 50 with the bending radius Rb inside the element substrate 1 being about 1.0 mm. In the preferred example, the starting point of the bending is from the curved area m. However, the bending point is not limited to the configuration of bending from the curved area m. If the area actually used for display is visible on the surface of the display panel 18 (the outer surface of the counter substrate 16), the display area V may be bent. Further, the frame region F may be bent as long as the apparent frame region is smaller than the conventional one. In any case, since the frame area F is folded back to the back surface, it is possible to realize a narrow frame of the display panel 18.

Returning to FIG.
Next, the planar dimensional relationship in the initial state of the display panel 18 will be described.
The length k1 of the frame region F on the upper side and the left and right sides of the display panel 18 in the preferred example is set to about 3.0 mm for all three sides.
In addition, the length k5 of the frame region F on the lower side of the display panel 18 in the preferred example is set to about 6.0 mm. In addition, it is not limited to these numerical values, and may be appropriately set with a length of 2.0 mm or more according to required specifications (reliability).

Subsequently, a manufacturing method for setting the display panel 18 described above to the support frame 50 to form the display device 100 and dimensions of related parts will be described.
First, the adhesive layer 60 made of double-sided tape is attached to the surface of the support frame 50. The thickness of the double-sided tape in the preferred example is 0.3 mm. In addition, it is not limited to this thickness, What is necessary is just in the range of 0.1-0.5 mm.
Moreover, it is not limited to sticking a double-sided tape on the whole surface of the support frame 50, and the display area V may be arranged so as to be supported (fixed) in a substantially flat state. For example, three strip-shaped double-sided tapes extending in the X-axis direction may be arranged in stripes so as to be positioned substantially at the center and both ends of the display area V in the Y-axis direction. According to this configuration, it is possible to reduce the generation of bubbles when the display panel 18 is attached.
Moreover, you may use the double-sided tape containing the above-mentioned heat conductive filler for heat dissipation improvement. Moreover, it is not limited to a double-sided tape, You may use the adhesive agent which has the same adhesiveness.

Subsequently, as shown in FIG. 1A, the back surface of the display area V of the display panel 18 is attached to the surface of the support frame 50. Note that the plane size of the support frame 50 in the preferred example is slightly larger than the display area V. Specifically, the length is set to be slightly larger than the display area V by the length u1. In other words, both vertical and horizontal lengths are set larger by “2 × length u1”. Note that the length u1 in the preferred example is about 0.5 mm.
This is because when the frame region F is affixed to the side surface of the support frame 50, the frame region F is approximately the surface of the support frame 50 in consideration of the thickness of the display panel 18 and the adhesive layer 60. This is to make a right angle.
Moreover, the thickness of the support frame 50 in a suitable example shall be about 3.5 mm, and the chamfering in the range of C0.5-1.0 mm is given to the corner | angular part from the surface to a side surface, for example. The height of the protrusion 53 from the back surface is about 5.0 mm.

Then, as shown in FIGS. 1B and 1C, the frame region F on the left and right sides is bent to the Z-axis (+) side and attached to the side surface of the support frame 50 with an adhesive layer 61 made of double-sided tape. . In addition, the thickness of the double-sided tape in a suitable example is 0.5 mm. In addition, it is not limited to this thickness, What is necessary is just in the range of 0.1-1.0 mm. Similarly, the frame region F on the upper side is bent and attached to the side surface of the support frame 50 with the adhesive layer 61.
The lower frame region F is bent to the Z-axis (+) side, attached to the side surface of the support frame 50 with the adhesive layer 61, and further bent to the back surface of the support frame 50 to end the frame region. Is attached to the back with double-sided tape.
In addition, as shown by a dotted line in FIG. 1C, the pasted frame region F may be further pressed by a tape member 85 from the outside. The tape member 85 may be a resin tape or a steel belt formed in a ring shape (bezel). If the tape member 85 is provided, the frame area F can be more reliably fixed to the side surface of the support frame 50. Further, the tape member 85 functions as an impact buffering member when the side surface hits during handling or tiling.

Through the above-described steps, as shown in FIGS. 1B and 1C, the frame region F on each side is bent at a substantially right angle and fixed to the side surface of the support frame 50.
First, the planar length k2 of the frame region F in the preferred example is about 1.1 mm.
That is, the plane size of the display device 100 is slightly larger than the display area V by the frame area F, but the width (length k2) of the frame area F in the preferred example is suppressed to about 1.1 mm on the entire circumference. It has been.
Further, the total thickness of the support frame 50 (excluding the protrusion 53) in the preferred example is about 3.9 mm.
Note that the dimensions of the above preferred examples are one of the preferred examples derived by the inventors from the experimental results and physical property data after creative ingenuity, and are not limited thereto. The dimensions can be appropriately set according to the size of the display panel and the application within a range not departing from the idea.

"Tiling mode"
FIG. 5 is a perspective view showing an aspect of a multi-display device equipped with the display device of this embodiment.
Here, an aspect in the case where tiling is performed using a plurality of the display devices 100 described above will be described.
The multi-display device 200 as an electronic device has a configuration in which a plurality of display devices 100 can be tiled to form a horizontally long large screen with an accept ratio of 5: 3.
A multi-display device 200 as an electronic device includes a pedestal portion 201, a plurality of display devices 100, and the like.
The pedestal part 201 is partitioned in a matrix of 3 rows × 5 columns, and the mating holes 202 into which the projections 53 of the display device 100 are fitted are shown in the upper left part of FIG. And a storage hole 203 for storing the connection substrate 23 is formed.

The fitting hole 202 has a planar shape that is one size larger than the planar shape of the protrusion 53. Moreover, the semicircular shape of each fitting hole 202 is aligned in the upward direction (Y-axis (+) direction).
In addition, a connection substrate 23 made of a flexible printed circuit board is connected to the terminal 22 (FIG. 2) of the flexible circuit board 20 in each display device 100.
The storage hole 203 stores the connection board in a state where the terminal portion of the connection board 23 is inserted into the socket inside. Further, on the back surface of the pedestal portion 201, wirings connected to the sockets of the partition areas and a controller (none of which is shown) for collecting the wirings are arranged, and the display devices 100 are arranged by the controller. It is configured to be capable of display driving.
Then, by setting 15 display devices 100 in all the partitioned areas, a horizontally long large screen with an acceptance ratio of 5: 3 is formed. In the preferred example, the gap between the display area V and the display area V in the two adjacent display devices 100 is set to about 3.0 mm in both the vertical and horizontal directions in consideration of a margin such as an attachment error.

As described above, according to the display device 100 according to the present embodiment, the following effects can be obtained.
According to the display device 100, the frame area F on each side of the display panel 18 is bent from the peripheral edge of the display area V toward the support frame 50 and fixed to the side surface of the support frame 50.
That is, since each frame area F is bent toward the support frame 50, the planar length k2 of the frame area is shortened.
Accordingly, it is possible to provide the display device 100 that realizes a narrow frame.

Furthermore, since the thicknesses of the two glass substrates in the preferred example are each about 30 μm, the allowable bending R as the display panel 18 is about 0.8 mm. However, in the display device 100, in consideration of durability, The bending radius Rb is set to about 1.0 mm larger than the allowable bending R. Therefore, durability is ensured while narrowing the frame.
Further, since the frame region F is bent, the length of the frame region F can be set to a length necessary for ensuring reliability.
Therefore, it is possible to provide the display device 100 capable of ensuring both reliability and narrowing the frame.
Further, by providing the display panel with a flexibility that allows the display panel to be bent substantially at a right angle, it is possible to realize a narrow frame with high market needs.
Therefore, it is possible to provide the display device 100 that realizes a narrow frame using flexibility.

Furthermore, by realizing a narrow frame, it is possible to realize a seamless display when tiling. Therefore, it is possible to provide a display device 100 suitable for a tiling method that can obtain a sufficient display quality with suppressed seams.
In particular, according to the multi-display device 200, in a preferred example, the gap between the display region V and the display region V in the two adjacent display devices 100 can be about 3.0 mm in both the vertical and horizontal directions.
When observing such a large screen at an appropriate viewing distance, it is substantially difficult to visually recognize a gap of about 3.0 mm, so that a seamless display can be realized.

Further, since the wiring part is selectively formed in the curved area m of the frame area F and the circuit part n is formed in the area excluding the area, damage to the circuit part n due to bending can be prevented. .
Therefore, the display device 100 with high reliability can be provided.
Moreover, since the support frame 50 is formed using aluminum having a thermal conductivity higher than that of resin or glass, heat generated by the display panel 18 can be efficiently absorbed and radiated to the outside. Therefore, it is possible to provide a display device 100 with a narrow frame that is excellent in heat dissipation.

(Embodiment 2)
FIG. 6A is a plan view (front view) illustrating one mode of the display device according to the second embodiment, and corresponds to FIG. FIG. 6B is a rear view of the display device. FIG. 7 is a plan view of the display panel and corresponds to FIG. FIG. 8A is a side sectional view taken along the line ss of FIG. 6A and corresponds to FIG. FIG. 8B is an enlarged view of a portion l in FIG. 8A 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 employs a display panel 19 in which the frame regions F on the upper side and the left and right sides of the display panel 18 of the first embodiment are lengthened, and a display that adopts a structure that folds the frame region F on each side. Device.

The display device 110 includes a support frame 55 (FIG. 8), a display panel 19, a spacer 65, a magnet sheet 66, and the like.
The support frame 55 is a metal flat plate having a planar size substantially the same as the display area V of the display panel 19. In this embodiment, an aluminum plate is used as a suitable example. Further, chamfering processing is performed on the peripheral portions on the front and back surfaces.
Note that the present invention is not limited to aluminum, and various metals described in Embodiment 1 may be used. Further, various resins described in the first embodiment may be used, or resin plates subjected to various surface treatments such as plating may be used.

FIG. 7 shows a planar shape of the display panel 19 in a single product state before being set on the support frame 55.
The display panel 19 differs from the display panel 18 of the first embodiment only in that the frame regions F on the upper side and the left and right sides are longer. Specifically, the length of the frame region F on the upper side and the left and right sides is a length k6 longer than the length k1. Further, the width of the curved area m is ensured at least twice that of the display panel 18 of the first embodiment. Further, the length of the frame region F on the lower side remains the same length k5 as that of the display panel 18 of the first embodiment.
The length k6 of the frame region F on the upper side and the left and right sides is slightly longer than the length k5 of the lower side. This is because the glue margin on the back surface of the support frame 55 is long for an amount corresponding to the protruding region on the lower side.
The spacer 65 is a sheet member made of a resin film.
The magnet sheet 66 is a flexible sheet member having magnetism formed by mixing magnetic powder with a binder resin such as rubber or elastomer.

"Manufacturing method and dimensions of each part"
In the second embodiment, the frame area F of each side of the display panel 19 is folded back to the back surface of the support frame 55 to realize a narrow frame.
Specifically, in a state where the back surface of the display area V of the display panel 19 is fixed to the front surface of the support frame 55, the frame regions F on the left and right sides are folded back to the back surface of the support frame 55 as shown in FIG. Then, a spacer 65 that complements the height is affixed between the frame regions F on the right and left sides that are folded back. Then, the frame regions F on the upper and lower sides are folded and pasted on the frame regions F on the left and right sides that have been folded and the spacer 65.
On the exposed spacer 65, a magnet sheet 66 having a substantially square shape is attached.

Next, specific dimensions of each part will be described.
First, the thickness relationship of the display panel 19 is the same as that of the display panel 18 of the first embodiment.
The length k6 of the frame region F on the upper side and the left and right sides in the preferred example is about 8.0 mm. Note that the length is not limited to this, and may be any length as long as a margin capable of maintaining the folded state can be secured.
Further, the support frame 55 in the preferred example is set to have the same planar size as the display area V of the display panel 19 and a thickness of about 1.6 mm. Moreover, the chamfering process of the peripheral part is about C0.2 mm.

FIG. 8B is a side cross-sectional view of a portion where the frame region F on the right side is folded.
The adhesive layers 60, 62 and 63 in the preferred example are both made of double-sided tape, and the thickness thereof is both 0.2 mm. In addition, the edge part of the frame area | region F of the folded upper side is observed in the lowest layer of FIG.8 (b). In addition, it is not limited to this thickness, What is necessary is just in the range of 0.1-0.5 mm. Moreover, you may use an adhesive agent similarly to description in Embodiment 1. FIG.
Further, the thickness obtained by adding the adhesive layers 60 and 62 to the support frame 55 in the preferred example is about 2.0 mm.
Further, the thickness of the spacer 65 in the preferred example is about 0.27 mm.

When these are combined, as shown in FIG. 8B, the frame region F is curved around the substantially center of the end surface of the support frame 55, and the folded portion is fixed to the back surface of the support frame 55. Become. At this time, the frame area F on the right side of the display panel 19 has a bending radius Rb on the inner side of the element substrate 1 of about 1.0 mm. This value is larger than the allowable bending R described with reference to FIG. In the preferred example, the starting point of bending is from the curved area m. However, the bending point is not limited to the configuration of bending from the curved area m, and bending may be performed at the boundary between the display area V and the frame area F. If the area actually used for display is visible on the surface of the display panel 19 (the outer surface of the counter substrate 16), the display area V may be bent. Further, the frame region F may be bent as long as the apparent frame region is smaller than the conventional one. In any case, since the frame area F is folded back to the back surface, the display panel 19 can be narrowed.
Further, the length k2 of the frame region F on each side of the display device 110 (display panel 19) in this completed state is about 1.1 mm as in the first embodiment.
The total thickness of the display device 110 (excluding the magnet sheet 66) is about 2.4 mm, which is thinner than the total thickness (about 3.9 mm) of the display device 100 of the first embodiment.
Note that the dimensions of the above preferred examples are one of the preferred examples derived by the inventors from the experimental results and physical property data after creative ingenuity, and are not limited thereto. The dimensions can be appropriately set according to the size of the display panel and the application within a range not departing from the idea.

As described above, according to the display device 110 of the present embodiment, in addition to the effects of the first embodiment, the following effects can be obtained.
According to the display device 110, the frame region F on each side is folded back to the back surface of the support frame 55 in a state where the back surface of the display region V of the display panel 19 is fixed using the support frame 55 as a core material. By fixing, the frame is narrowed and thinned.
Accordingly, it is possible to provide the display device 110 that realizes a narrow frame. In other words, it is possible to provide the display device 110 that realizes a narrow frame using flexibility.

In addition, since the length k6 of the frame region F of the display panel 19 is longer than the length k1 of the first embodiment, the barrier layer becomes correspondingly longer and the reliability can be improved.
Further, since the wiring part is selectively formed in the curved area m of the frame area F and the circuit part n is formed in the area excluding the area, damage to the circuit part n due to bending can be prevented. .
Therefore, it is possible to provide the display device 110 that ensures both reliability and a narrow frame.

In addition, since the support frame 55 is formed using an aluminum plate having excellent thermal conductivity, the heat generated by the display panel 19 during display can be efficiently absorbed and radiated to the outside.
Therefore, it is possible to provide the display device 110 with a narrow frame that is excellent in heat dissipation.
Furthermore, since the support frame 55 is a simple flat plate, it can be efficiently manufactured by press working, and component costs can be suppressed.
Further, the total thickness of the support frame 55 plus the adhesive layers 60 and 62 in the preferred example is about 2.0 mm, and half the total thickness (about 1.0 mm) and the bending radius Rb (inside the element substrate 1) Approximately 1.0 mm).
Therefore, it is possible to prevent the element substrate 1 from being bent beyond the allowable bending R due to the total thickness. In other words, by adjusting the total thickness of the support frame 55 including the adhesive layers 60 and 62 to the allowable bending R of the element substrate 1, a narrow frame can be easily achieved within the allowable bending R range of the element substrate 1. can do.
The total thickness of the display device 110 (excluding the magnet sheet 66) is about 2.4 mm, which is thinner than the total thickness (about 3.9 mm) of the display device 100 of the first embodiment.
Therefore, it is possible to provide the display device 110 that achieves both a reduction in thickness and a narrow frame.

(Embodiment 3)
FIG. 9A is a plan view showing an aspect of the display panel according to Embodiment 3, and corresponds to FIG. FIG.9 (b) is a figure which shows the manufacture aspect of the lamination process of a display panel. Fig.10 (a) is a sectional side view in the nn cross section of Fig.9 (a).
Hereinafter, a display panel according to Embodiment 3 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.
In each of the above embodiments, the display panel with the glass substrate exposed is folded or folded, but a display panel in which the front and back surfaces are laminated with a resin film may be used.

  As shown in FIG. 10A, the display panel 28 according to Embodiment 3 is obtained by laminating the display panel 18 according to Embodiment 1 from the surface on the counter substrate 16 side and the surface of the element substrate 1 with resin films 25a and 25b. It has become the composition. In other words, resin films 25a and 25b for laminating the display panel 18 from the front and back surfaces are provided. Since the laminated resin films 25 a and 25 b are integrated with the display panel 18, the laminate of the two resin films is referred to as a laminate structure 25.

FIG. 9A is a plan view of the display panel 28 in a single product state.
The display panel 28 is basically the same as the display panel 18 of the first embodiment, but the length of the flexible substrate 20 is slightly longer. Specifically, it is longer in the Y-axis (−) direction by a glue margin (laminate) length u2. Although described in detail later, this is for exposing the driving IC 21 from the laminate structure 25.
The planar size of the laminate structure 25 is slightly larger than the display panel 18 by the amount of glue (laminate). Specifically, all four sides are larger than the outer shape of the display panel 18 by a length (width) u2. That is, the length of the frame region F on each side is increased by the length u2.
Further, the corner radius Ra portions (including the cutout portions) at the four corners of the display area V are not laminated and have the same shape as the outer shape of the display panel 18.

“Resin film material and dimensions”
Returning to FIG.
Here, the material of the two resin films 25a and 25b constituting the laminate structure 25 will be described.
The resin films 25a and 25b that cover and laminate the display panel 18 have adhesiveness to a glass substrate, flexibility, transparency (light extraction property), moldability (insulation and heat resistance) of the flexible substrate 20, and the inside. Functions such as water resistance to prevent moisture intrusion 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.
In the present embodiment, as a suitable example, an ethylene-vinyl acetate copolymer (EVA), which is a kind of polyethylene copolymer, is employed as the material of the resin films 25a and 25b.

In addition, it is not limited to EVA, What is necessary is just a polyethylene-type copolymer which has the same function.
For example, polyethylene terephthalate (PET), ethylene-hydroxyalkyl methacrylate copolymer, ethylene-alkoxyethyl methacrylate copolymer, ethylene-aminoethyl methacrylate copolymer, ethylene-hydroxyglycidyl methacrylate copolymer, ethylene -It is preferable to use any one of vinyl alcohol copolymer (EVOH), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), and 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 by heat in combination with a crosslinking component such as an epoxy-based curing agent so that acrylic acid does not remain.

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 results of experiments by the inventors, 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 and to secure the contraction stress. I know that
Considering the balance between these characteristics and the total thickness of the display device 110, 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 a lamination are considered, it is more preferable to exist in the range of 40-80 micrometers.

"Lamination method of display panel"
FIG. 9B is a diagram showing a manufacturing mode of the laminating process.
Next, a method for manufacturing the display panel 28 will be described in detail.

First, each member is put in a superimposed state (preparation body) and set in a laminating apparatus. Specifically, the display panel 18 and the resin film 25a are overlaid in this order on the resin film 25b. Although this step is performed under a normal environment as a suitable example, it may be performed under a reduced pressure environment described later.
A transparent adhesive may be applied in advance to the inner surfaces of the resin films 25a and 25b (the surface on the display panel 18 side). Examples of adhesives include thermosetting adhesives such as epoxy, urethane, and nylon, rubber flexible adhesives such as SBR, chloroprene, and nitrile rubber, or acrylic and synthetic rubber pressure sensitive. An adhesive or the like can be used.
Then, the preparation is set in the laminating apparatus. In FIG. 9B, only the pressure rollers 81 and 82 of the laminating apparatus are shown.

Subsequently, the environment in which the laminating apparatus and the preparation body are installed is decompressed to obtain a decompressed 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.
Subsequently, as shown by an arrow in FIG. 9B, 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. . 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 covers and adheres to the display panel 18 and the flexible substrate 20. In other words, each part of the resin film in which the adherend is dissolved is laminated integrally.
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 the drawing, the laminated display panel 28 is pushed out between the pressure rollers 81 and 82 to complete the lamination.

In addition, about the corner | angular radius Ra part (a notch part is included) of four corners of the display area V shown by hatching in FIG.9 (b), it cuts out after lamination. Or you may use resin film 25a, 25b of the state from which the said part was notched from the initial stage.
Further, the laminating apparatus is not limited to the roll laminating system including the pair of pressure rollers 81 and 82, and any apparatus capable of laminating the prepared body to the completed state of the display panel 28 may be used. For example, using a diaphragm-type vacuum laminating apparatus in which a preparation body is set on one plate-like heating plate (hot plate), a deformed rubber sheet is pressed against the preparation body by a pressure difference, and heated and pressurized. Also good.

"Operation of laminate structure"
FIG. 10A also serves as an explanatory diagram of the operation of the laminate structure. FIG. 10B is an operation explanatory diagram when a display panel having a laminate structure is applied to the folded structure of FIG. 8B.
Here, the effect | action regarding the bending tolerance by having laminated | stacked the display panel 18 with the laminate structure 25 is demonstrated.
The laminate structure 25 has an effect of improving bending resistance in addition to the effects of preventing the entry of moisture from the outside by wrapping the display panel 18 and softening the mechanical impact.
Specifically, the laminate structure 25 is heated when laminating and then naturally cooled. Therefore, the laminate structure 25 is always shrunk at room temperature after cooling as shown by the arrow in FIG. It is in a state where the shrinkage stress is working.

After laminating, the shrinkage stress on the front and back surfaces is offset in a state where the laminating structure 25 is fixed at the marginal margin. In other words, since the shrinkage stress on the front and back surfaces is balanced, the display panel 28 is kept flat.
According to the findings from the experiment results of the inventors, it has been confirmed that this shrinkage stress has the same action as the compressive stress layer formed on the front and back of the tempered glass. In other words, when a tensile force is applied to break the tempered glass (display panel), the compressive stress layer (laminate structure) on the surface works to counteract this, compared with the case where the layer is not formed. And more than double the strength performance.

Also, this action has been found to work effectively, particularly at the bends.
For example, FIG. 10B shows a case where the display panel 28 having a laminate structure according to this embodiment is applied to the folded structure according to the second embodiment.
As shown in FIG. 10B, when the display panel 28 is bent, tensile stress is generated in the curved portion of the internal display panel 18 as indicated by the inner arrow. For example, when there is a microcrack at the end of the curved portion, the tensile stress acts in a direction to spread the microcrack.
On the other hand, shrinkage stress is acting on the curved portion of the laminate structure 25 as indicated by the outer arrow. This shrinkage stress acts in a direction to suppress the internal display panel 18 from being bent excessively. For example, when there is a microcrack at the end of the curved portion of the display panel 18, the microcrack acts so as not to expand.
Here, since the material and thickness of each part in the display panel 28 are set so that the contraction stress is larger than the tensile stress, the laminate structure 25 is laminated rather than the case of the display panel 18 alone. The display panel 28 has better bending resistance. In other words, since the display panel 28 has excellent bending resistance, the display panel 28 can also be used for bending (turning back) at 180 degrees as shown in FIG.
Even when the display panel 28 of the present embodiment is applied to the folding structure of the first embodiment, the same operational effects can be obtained.

  When the display panel 28 of the present embodiment is applied to the folding structure of the first embodiment or the folded structure of the second embodiment, the thickness of the support frames 50 and 55 and the frame region F of the display panels 18 and 19 The length and the like may be adjusted as appropriate according to the size and application of the display panel, required specifications, and the like.

As described above, when the display panel having the laminate structure of the present embodiment is used for the folding structure of the first embodiment or the folded structure of the second embodiment, the following effects can be obtained in addition to the effects of the respective embodiments. .
By applying the display panel 28 having a configuration in which the display panel 18 is laminated with the laminate structure 25 to the folding structure of the first embodiment or the folding structure of the second embodiment, bending resistance can be improved.
In addition, it is possible to further improve the moisture entry prevention property from the outside. Furthermore, since the mechanical impact is softened, the handleability can be improved.
Therefore, it is possible to provide a display device that ensures both reliability and a narrow frame.

In general, the connecting portion between the overhanging region of the display panel 18 and the flexible substrate 20 is reinforced by a molding agent such as a silicone resin (adhesive) covering the connecting portion. there were.
On the other hand, according to the display panel 28, since the reinforcing structure is also used by laminating with the resin films 25a and 25b, the manufacturing efficiency is high. Further, since the connection portion and the display panel 19 are bonded (filled) with the same resin, sufficient practical strength (toughness) can be secured 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.

(Electronic equipment 1)
FIG. 11 is a plan view showing an on-vehicle meter equipped with the display device.
The display device 110 according to the second embodiment described above can be used by being mounted on, for example, an in-vehicle meter 210 for an automobile as an electronic device.
The in-vehicle meter 210 includes three display devices 110 arranged side by side. Specifically, the display device 111, the display device 112, and the display device 113 are arranged in this order from the left. Note that the outline of the display device is indicated by a dotted line.
The display device 112 located in the middle has a panel size that is slightly larger than the left and right display devices 111 and 113. With these three display devices, one on-vehicle meter exposed from the opening 212 of the dashboard is displayed. It is composed. In other words, one in-vehicle meter exposed from a horizontally long and elliptical opening 212 having a base cut in a straight line is configured by tiling three display devices 111, 112, and 113 in the horizontal direction. Yes.

For example, a fuel gauge, a water temperature gauge, and the like are displayed on the left display device 111.
For example, a speedometer, a direction indicator, and the like are displayed on the central display device 112.
For example, a tachometer or the like is displayed on the right display device 113. Note that FIG. 11 shows a state in which analog display is performed, but digital display can also be performed by operating a switch (not shown).
Here, the composite display by the three display devices is required to be close and seamless. For this reason, the display device 110 capable of handling a narrow frame is employed, and a narrow frame is realized.
Instead of the display device 110, the display device 100 according to the first embodiment may be used. Moreover, you may use combining these. Even with this configuration, tiling is possible in the same manner, and narrowing of the frame can be realized.

Further, the present invention is not limited to the use of tiling a plurality of display devices, and even a configuration using a single display panel can be applied to an electronic device that requires a narrow frame.
For example, it can be suitably used for a mobile phone that is compact but requires a relatively large display screen. The mobile phone may also be a foldable type in which the display unit can be folded with respect to the main body, or a mobile phone that can be turned in addition to folding. Alternatively, the mobile phone may be an integrated mobile phone or a sliding mobile phone in which an operation unit is housed in an integrated main body.
In addition, the electronic device is not limited to a mobile phone, and any electronic device including a display panel may be used. For example, it can be used in various electronic devices such as a display device for a car navigation system, PDA (Personal Digital Assistants), a mobile computer, a digital camera, a digital video camera, an in-vehicle device, and an audio device.

(Electronic equipment 2)
FIG. 12A is a perspective view showing an embodiment of a multi-display device equipped with the display device, and corresponds to FIG. FIG. 12B is a side cross-sectional view of the display device, and corresponds to FIG. FIG.12 (c) is a sectional side view in the qq cross section of (a).
Here, a multi-display device 220 having a connection configuration of display devices different from the multi-display device 200 described above will be described.

The multi-display device 220 as an electronic device has a configuration capable of forming a horizontally long large screen with an acceptance ratio of 4: 3 by tiling a plurality of display devices 100.
The base part 201 of the multi-display device 220 is the same as the base part 201 of the first embodiment, and the configuration of the plurality of display devices 100 is different from that of the first embodiment.
Specifically, as illustrated in FIG. 12B, each display device 100 includes bezels 86 and 87 that press the frame region F from the outside toward the support frame 50. The bezels 86 and 87 are members that function in the same manner as the tape member 85 described in the first embodiment, but have different names depending on the mounting position of the bezel in the thickness direction (Z-axis direction).
In FIG. 12B, a bezel arranged on the upper side (Z-axis (−) direction) of the side surface of the support frame 50 is a bezel 86, and a display device to which the bezel is attached is a display device 101.
Further, a bezel arranged on the lower side (Z-axis (+) direction) of the side surface of the support frame 50 is a bezel 87, and a display device to which the bezel is attached is a display device 102.
Moreover, although the bezels 86 and 87 in a suitable example are metal rings, other members described in the first embodiment may be used. Further, the heights of the bezels 86 and 87 in the Z-axis direction are set to about half of the thickness of the support frame 50, respectively. A chamfering process is applied to the corners on the inner peripheral side (the frame region F side) of the bezels 86 and 87.

FIG. 12C is a side cross-sectional view between the adjacent display device 101 and the display device 102 that are tiled on the pedestal portion 201. As shown in the drawing, between the tiled display device 101 and the display device 102, the bezel 86 and the bezel 87 do not overlap in the left-right direction (horizontal direction), but in the up-down direction (vertical direction). ). Therefore, the gap between adjacent display devices can be reduced. In other words, a narrow frame can be achieved.
Further, as shown in FIG. 12A, when tiling the display devices 101 and 102, they are arranged alternately in the row direction and the column direction. Further, when setting the pedestal 201, the display device 101 is set after all the display devices 102 are set.

Thus, according to the display devices 101 and 102, since the bezels 86 and 87 are provided, respectively, the frame region F can be more reliably fixed to the side surface of the support frame 50. Further, since the bezels 86 and 87 function as an impact buffering member when the side surfaces hit during handling or tiling, they are easy to use and excellent in reliability.
Therefore, according to the multi-display device 220, since the display devices 101 and 102 are provided, it is possible to achieve both narrowing of the frame and high reliability.
12A, the case where the acceptance ratio 4: 3 is formed has been described. However, according to the multi-display device 220, a large screen having a desired acceptance ratio can be obtained by setting the matrix section of the pedestal 201. It can be simply configured.

In the first embodiment, the flexible printed circuit board is connected to the terminal 22 (FIG. 2) of the flexible circuit board 20 in each display device, and is further connected to the controller inside the pedestal unit 201 via the wiring from the circuit board. However, it may be configured to be connected to the controller wirelessly.
Specifically, each display device is equipped with a small controller, a power supply circuit, a wireless LAN terminal, and an antenna for the terminal. Note that the power supply circuit includes a power receiving module including a power receiving coil and a secondary battery.
In addition, the pedestal 201 is equipped with a main controller, a wireless LAN terminal, and an antenna for the terminal, and transmits power in a non-contact manner by electromagnetic induction to the power supply circuit of the display device for each partitioned area. A power transmission module including a coil is arranged.

According to this configuration, a control signal including an image signal or the like is wirelessly transmitted from the main controller to each display device via a wireless LAN, and the power of each display device is contactless from a power transmission module installed for each partition area. Will be powered.
Therefore, when the display device is set on the pedestal portion, it is only necessary to fix the display device for each partition region, so that troublesome work such as wiring can be reduced.
Further, since communication is possible within a wireless LAN communication area, for example, the main controller may be installed at a location away from the multi-display device.
According to this configuration, it is possible to display desired information without requiring wiring processing or the like wherever the multi-display device is installed in the communication area.
Therefore, it is possible to provide a multi-display device that is easy to use.

  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)
FIG. 13 is a side sectional view of a display panel according to the first modification, and corresponds to FIG.
In each of the above embodiments, the display panel has been described as a configuration using two glass substrates. However, the present invention is not limited to this, and any configuration may be used as long as at least one glass substrate is used. In addition, about the component same as Embodiment 1, the same number is attached | subjected and the overlapping description is abbreviate | omitted.
The display panel 118 of Modification 1 is a bottom emission type organic EL display panel having a configuration in which an organic EL layer and a barrier layer are stacked on an element substrate 1 made of glass. For this reason, compared with the display panel 18 of FIG. 3, the stacking order (top and bottom) is reversed, and the element substrate 1 is located on the top (Z-axis (−) side). Further, the element substrate 1 serves as a display surface, and display light is emitted from the element substrate 1 side as indicated by a white arrow.

The display panel 118 includes an element substrate 1, an element layer 2, a planarization 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 protection layer 10, a buffer layer 11, and a gas barrier layer. 12 or the like. The material and configuration of each part are the same as described in the first embodiment.
Moreover, in this modification, as a suitable example, the organic EL layers 8r, 8g, and 8b of each color of red, green, and blue are formed by a three-color painting method using an ink-jet method using a polymer material. For example, in the blue organic EL layer 8b, PEDOT / PSS is used as the hole injection layer, TFB is used as the hole transport layer, and a polyfluorene derivative is used as the light emitting layer. In the red and green organic EL layers 8r and 8g, polymer materials that emit red or green are used.

When this display panel 118 is applied to each of the above-described embodiments, the gas barrier layer 12 side faces the support frames 50 and 55. Therefore, in order to make the support frame and the support substrate have the function of the counter substrate, the adhesive layer It is preferable to attach 60 to the entire surface and adhere.
Even when the display panel 118 is applied to each of the above-described embodiments, it can be bent in the same manner, so that the same effects as those of the above-described embodiments can be obtained. In addition, since the support frame and the support substrate can have the function of the counter substrate, the same reliability as in each of the above embodiments can be ensured.

Further, a display panel having a configuration based on a so-called three-color coating method in which a color filter is deleted from the configuration of the display panel of each of the above embodiments and a light emitting layer of each RGB color is formed for each RGB color pixel may be used. .
Further, the display panel of each of the above embodiments 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 counter 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 above-described embodiments, the display area V is described as being formed on a flat surface portion, but the display area V may be on the bending radius Rb. In other words, the display area V may include a bent portion.
According to this configuration, since the end portion of the frame region F includes the curved surface portion of the bending radius Rb in FIG. 1C, the length k2 of the frame region F is shortened accordingly, and the narrower frame and can do. Further, the present invention can also be applied to the configuration of FIG. 8B, and similarly, a narrow frame can be achieved.
Further, in the portion of the display area V that covers the curved surface portion of the bending radius Rb, for example, the planar display mode can be made uniform by increasing the display luminance of the pixels as compared with the planar portion. In other words, the display image can be made uniform by changing the display driving condition in the display region V portion applied to the curved surface portion of the bending radius Rb from that of the flat surface portion. Further, in the curved surface portion of the bending radius Rb, display driving may be performed so as to gradually increase the display luminance of the pixels by adding gradation as the distance from the portion near the display region V (plane portion) increases.
That is, the frame can be narrowed if it is bent or folded from the vicinity of the peripheral edge of the display region V.

(Modification 3)
FIG. 14 is a cross-sectional view of a display panel according to Modification Example 3, and corresponds to FIG.
In each of the above embodiments, the display panel has been described as an organic EL panel, but the present invention is not limited to this, and any structure may be used as long as at least one glass substrate is used. A thin display panel provided with an electro-optic layer may be used. For example, an electrophoretic panel including an electrophoretic layer may be used as the electro-optical layer.
Hereinafter, the display panel 128 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 128 of the present embodiment is a reflective electrophoretic panel provided with an electrophoretic layer 97 as an electro-optical layer.

The display panel 128 has a configuration in which an electrophoretic layer 97 is sandwiched between the element substrate 1 and the counter substrate 95. 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 95 is a transparent substrate made of, for example, glass or plastic. On the element substrate 1 side of the counter substrate 95, a counter electrode 94 is formed on the entire surface (solid shape) so as to face the plurality of pixel electrodes 6. The counter electrode 94 is made of a transparent conductive material such as ITO.
The electrophoretic layer 97 includes a plurality of microcapsules 90, a binder 92 that holds the microcapsules, an adhesive layer 91, and the like. Note that the display panel 128 includes an electrophoretic sheet in which the electrophoretic layer 97 is fixed to the counter substrate 95 in advance with a binder 92, and the element substrate 1 on which the pixel electrode 6 and the like are formed separately from the sheet. Is formed by bonding with an adhesive layer 91.

One or a plurality of microcapsules 90 are sandwiched between the pixel electrode 6 and the counter electrode 94 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. 14, the microcapsule 90 has a configuration in which a dispersion medium 78, a plurality of white particles 76, and a plurality of black particles 77 are enclosed in a coating 75. The microcapsule 90 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 78 is a medium for dispersing the white particles 76 and the black particles 77 in the microcapsules 90 (in other words, in the coating film 75).

The white particles 76 are particles (polymer or colloid) made of a white pigment such as titanium dioxide, zinc white (zinc oxide), and antimony trioxide, and are negatively charged, for example.
The black particles 77 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 76 and the black particles 77 move in the dispersion medium 78 due to the electric field (potential difference) generated by the potential difference between the pixel electrode 6 and the counter electrode 94, so that the particles gathered on the counter electrode 94 side. The color tone will be displayed.
It should be noted that color display such as red, green, and blue can be performed by replacing the pigment used for the white particles 76 and the black particles 77 with pigments such as red, green, and blue.
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.

(Modification 4)
FIG. 15A is a plan view of a display panel according to Modification 4 and a tiling aspect diagram of a display device including the display panel. FIG. 15B is a plan view of a display panel of a different form according to the modified example 4, and a tiling aspect diagram of a display device including the display panel.
In each of the above embodiments, the display area V (planar shape of the display device) has been described as a rectangle including a square. However, the present invention is not limited to this, and any polygon that can be tiled may be used.
Hereinafter, the tiling mode of the display panel and the display device according to the modified example 4 will be described with reference to FIGS. In addition, about the same component as each said embodiment, the same number is attached | subjected and the overlapping description is abbreviate | omitted.

The display panel 30 in FIG. 15A includes a display area V having a substantially equilateral triangle. Further, the external shape of the display device 130 in which the display panel 30 is applied to the folding structure of the first embodiment or the folded structure of the second embodiment is also a substantially equilateral triangle. The laminate structure of the third embodiment may be applied to the display panel 30.
Even with these configurations, a seamless large screen can be configured by tiling a plurality of display devices 130 as shown in the lower right of FIG. Note that the shape of the display region V is not limited to an equilateral triangle, and may be any triangle that can be arranged as a graphic without a gap, such as an isosceles triangle.

The display panel 31 shown in FIG. 15B includes a substantially regular hexagonal display area V. Further, the external shape of the display device 131 in which the display panel 31 is applied to the folding structure of the first embodiment or the folded structure of the second embodiment is also a substantially regular hexagon. Note that the laminate structure of the third embodiment may be applied to the display panel 31.
Even with these configurations, a seamless large screen can be configured by tiling a plurality of display devices 131 as shown in the lower right of FIG. The shape of the display region V is not limited to a rectangle, a triangle, or a regular hexagon, and may be any shape that can be arranged as a figure without a gap, such as a rhombus or a trapezoid.
If it is such a polygon, the frame area F on each side of the display panel is bent from the vicinity of the peripheral edge of the display area V to the support frame side and fixed to the side surface of the support frame, or folded back and the back surface of the support frame By fixing to the frame, a narrow frame can be realized, and a seamless large screen can be configured by tiling.
That is, it is possible to obtain the same effects as those of the above embodiments.

  DESCRIPTION OF SYMBOLS 1 ... Element board | substrate as a glass substrate, 8 ... Organic EL layer, 16 ... Opposite board | substrate as a glass substrate, 17 ... Functional layer as an electro-optic layer, 18, 19, 28 ... Display panel, 20 ... Flexible substrate, 25 ... Laminate structure, 25a, 25b ... resin film, 50, 55 ... support frame, 60, 61, 62 ... adhesive layer, 85 ... tape member, 86, 87 ... bezel, 100, 110 ... display device as electro-optical device, 200, 220 ... multi-display device as electronic device, 210 ... vehicle-mounted meter as electronic device, F ... frame region, V ... display region.

Claims (16)

A display panel formed by forming an electro-optic layer including a display region in which a plurality of pixels are formed on a glass substrate having a thickness of 50 μm or less;
A planar size is formed substantially the same as the display area, and includes a support frame that supports the display panel,
The display panel has a frame region extending from the one side to the outside of the display region for each side of the display region,
Each of the frame regions is bent toward the support frame from the vicinity of the peripheral edge of the display region, and is fixed to a side surface of the support frame.   The electro-optical device according to claim 1, wherein the support frame and the display area are formed with substantially the same area in a plan view.   The electro-optical device according to claim 1, wherein the support frame is a metal plate-like member and has a thickness of 2 mm or more.   A first adhesive layer for fixing the display panel is disposed on a surface of the support frame on the display panel side, and a second frame for fixing the frame region on the side surface of the support frame. The electro-optical device according to claim 1, wherein an adhesive layer is disposed.   The electro-optical device according to claim 1, wherein a notched portion having a predetermined curvature is formed in the bent portion of the frame region.   The electro-optical device according to claim 1, further comprising a tape member or a bezel that presses the bent portion on the side surface of the support frame from the outside. A display panel formed by forming an electro-optic layer including a display region in which a plurality of pixels are formed on a glass substrate having a thickness of 50 μm or less;
A support frame for supporting the display panel,
The display panel has a frame region extending from the one side to the outside of the display region for each side of the display region,
When the surface on the display panel side of the support frame is the front surface, and the surface opposite to the front surface is the back surface,
Each of the frame regions is folded back from the vicinity of the peripheral edge of the display region to the back surface side of the support frame. A first adhesive layer for bonding and supporting the display panel is provided on the front surface of the support frame, and a third adhesive layer for bonding the folded one side to the back surface. Is provided,
The bending radius of the glass substrate in the folded portion is substantially the same radius as the half of the thickness of the support frame plus the thickness of the first adhesive layer and the third adhesive layer. The electro-optical device according to claim 7. When the glass substrate is the first substrate,
The display panel further includes a second substrate made of a glass substrate having substantially the same thickness as the first substrate, and the electro-optic layer is sandwiched between the first substrate and the second substrate. The electro-optical device according to claim 1, wherein   The electro-optical device according to claim 9, further comprising a resin film that covers and laminates the display panel from the first substrate side and the second substrate side. In the frame area of the display panel, a pixel circuit including a drive circuit for driving the plurality of pixels is formed,
11. The wiring portion for connecting the pixel and the pixel circuit is formed in the bent portion or the bent and bent portion. The electro-optical device according to one item.   12. The electro-optical device according to claim 1, wherein a length of the frame region that is bent or folded back is secured to 2 mm or more.   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. A plurality of electro-optical devices according to claim 1,
An electronic apparatus comprising a display unit that tiles the plurality of electro-optical devices. An electronic apparatus comprising a plurality of electro-optical devices according to claim 6,
A plurality of first electro-optical devices each having the bezel disposed on the upper side of the side surface, which is the display panel side, and a plurality of second electro-optical devices each having the bezel disposed on the lower side opposite to the upper side of the side surface. And
When the first electro-optical device and the second electro-optical device are arranged, the bezels are arranged so as not to overlap in the plane direction;
An electronic apparatus comprising: a display unit formed by tiling and arranging the first electro-optical device and the second electro-optical device alternately.

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