JP2014132319A - Display panel and display device using the same - Google Patents

Display panel and display device using the same Download PDF

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Publication number
JP2014132319A
JP2014132319A JP2013000684A JP2013000684A JP2014132319A JP 2014132319 A JP2014132319 A JP 2014132319A JP 2013000684 A JP2013000684 A JP 2013000684A JP 2013000684 A JP2013000684 A JP 2013000684A JP 2014132319 A JP2014132319 A JP 2014132319A
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side
display
display area
display panel
substrate
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JP2013000684A
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Masumi Ido
眞澄 井土
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Panasonic Corp
パナソニック株式会社
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Priority to JP2013000684A priority Critical patent/JP2014132319A/en
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Abstract

PROBLEM TO BE SOLVED: To provide a display panel capable of reducing defects and improving reliability.SOLUTION: A display panel 10 includes: a polygonal shape display region 1 in which a plurality of pixels are formed; a non-display region 3 which is located adjacent to the outside of the display region 1; and extending regions 4a, 4b, 4c and 4d which are located adjacent to the outside of the non-display region 3 with a plurality of sides including a first side 2a and a second side 2b being a boundary. The extending regions 4a, 4b, 4c and 4d are folded in the direction opposite from the display side in the display region 1 in the vicinity of the boundary with the non-display region 3. The non-display region 3 has a notch part 5a located between the first side 2a and the second side 2b and formed more on the display region side than an intersection between an extension line of the first side 2a and an extension line of the second side 2b.

Description

  The present invention relates to a display panel, and more particularly to a display panel in which a display area of a larger screen can be configured by arranging a plurality of display devices to which the display panel is fixed.

  In recent years, display devices such as display devices and lighting devices tend to become larger and larger. From the viewpoint of manufacturing, transportation, and maintenance, it is more advantageous to increase the size by joining smaller display panels than to construct a large display area with a single large display panel. It is considered.

  Patent Document 1 discloses a display unit in which an end portion of a display panel is bent rearward and a signal connector is disposed in the rear bent portion. By joining a plurality of such display units, it is possible to realize an increase in the size of the display device.

Japanese Patent Laid-Open No. 61-223878

  However, when a display unit is configured by folding the display panel as in Patent Document 1, when the display panel is folded, strong stress is applied at the corner where the folded side and the folded side of the display panel intersect. There arises a problem that distortion occurs and the display panel breaks.

  The present invention has been made in view of the above problems, and an object thereof is to provide a display panel or the like that can reduce defects and improve reliability.

  In order to solve the above problems, a display panel according to the present invention includes a polygonal display region in which a plurality of pixels are formed, a non-display region located adjacent to the outside of the display region, and a first adjacent one. A plurality of sides including the second side and the second side as a boundary, and a lead-out region located adjacent to the outside of the non-display region, wherein the lead-out region is near the boundary with the non-display region. The non-display area is bent between the first side and the second side, and the extension line of the first side and the second side are bent. It has a notch formed on the display area side from the intersection with the extension line.

  According to the display panel of the present invention, it is possible to reduce defects and improve reliability.

It is a figure which shows typically schematic structure of the display panel which concerns on embodiment. It is an enlarged view of the notch part of the display panel which concerns on embodiment. It is a figure which shows another example of a notch part. It is sectional drawing which shows the structure of one pixel of the display panel which concerns on embodiment. 4A is a top view illustrating a configuration of the display device according to the embodiment, and FIG. 4B is a side cross-sectional view of the display device taken along line aa in FIG. It is an enlarged view of the corner | angular part of the display apparatus which concerns on embodiment. It is a perspective view which shows schematic structure of the display comprised by combining a some display apparatus.

  In order to achieve the above object, a display panel according to one embodiment of the present invention includes a polygonal display region in which a plurality of pixels are formed, a non-display region positioned adjacent to the outside of the display region, A plurality of sides including a first side and a second side that meet each other as a boundary, and a lead-out region located adjacent to the outside of the non-display region, wherein the lead-out region is in the vicinity of the boundary with the non-display region And the non-display area is located between the first side and the second side, the extension line of the first side and the second side A notch formed on the display area side of the intersection with the extension line of the side.

  Thereby, since the stress concerning the notch part vicinity located between a 1st edge | side and a 2nd edge | side can be relieve | moderated, the fracture | rupture of the display panel by stress can be suppressed. Therefore, defects can be reduced and reliability can be improved.

  Further, for example, on the straight line from the intersection of the extension line of the first side and the extension line of the second side to the corner closest to the intersection among the plurality of corners of the display area, the notch The range in which is formed may be shorter than the range in which the notch is not formed.

  Thereby, since the distance from the end surface of the display panel to the display area can be secured, it is possible to suppress the light emission failure of the pixel due to the intrusion of moisture from the notch to the display area.

  In addition, for example, the display panel is provided in the display area, the non-display area, and the lead-out area, and a first substrate located on a light extraction side that is a display side of the display area; the display area; A second substrate provided in the non-display area and the lead-out area and positioned opposite to the first substrate, and provided in the display area and sandwiched between the first substrate and the second substrate. And an electro-optic layer.

  In addition, for example, the notch includes a first substrate notch formed on the first substrate and a second substrate notch formed on the second substrate, The area of the first substrate notch may be larger than the area of the second substrate notch.

  Thereby, the stress concerning the notch part vicinity located between a 1st edge | side and a 2nd edge | side can further be relieve | moderated. Specifically, when the display panel is bent, the stress applied to the first substrate is larger than the stress applied to the second substrate. Therefore, the stress applied to the first substrate can be relieved more greatly by increasing the area of the first substrate cutout portion than the area of the second substrate cutout portion. Therefore, compared with the case where the area of the 1st board notch part and the area of the 2nd board notch part are the same, the stress concerning the notch part vicinity can be eased further.

  In addition, for example, the first substrate is formed in a region where the area of the non-display region and the extraction region is smaller than that of the second substrate and the second substrate notch is not formed. It may be.

  Accordingly, the end of the first substrate notch and the end of the second substrate notch do not overlap, that is, the contour of the first substrate and the contour of the second substrate do not overlap. The stress applied in the vicinity of the notch can be further relaxed.

  For example, the drawer region may be bent into a curved shape, and the bending start position of the curved shape may be in contact with the first side and the second side.

  Thus, by bending the drawer region in a curved shape, the stress applied to the display panel can be reduced as compared with the case where the drawer region is bent without being bent (for example, when the drawer region is bent at a right angle). In addition, since the bending start position is in contact with the first side and the second side, it is possible to reduce a pull-out region observed when the display panel is viewed in plan from the display side. That is, it is possible to make the joints less noticeable when tiling using a plurality of display panels.

  Further, for example, the display area has a quadrangular shape, and the non-display area surrounds the display area and is surrounded by four sides including the first side and the second side and the notch. Also good.

  For example, the four sides are adjacent to the first side, the second side, the third side adjacent to the second side, the first side, and the third side. And the display panel includes the second side and the third side, the third side and the fourth side, the fourth side and the third side. Between the first side and the intersection of the extension line of the second side and the extension line of the third side, respectively, the display region side, the extension line of the third side, and the fourth side, respectively. A cutout is formed on the display area side from the intersection with the extension line of the side, and a cutout is formed on the display area side from the intersection of the extension line of the fourth side and the extension line of the first side. The region may be composed of four independent regions located adjacent to the outside of the non-display region with the first to fourth sides as a boundary.

  A display device according to one embodiment of the present invention includes the display panel. Specifically, a display device according to one embodiment of the present invention includes the above display panel and a support member to which the display panel is fixed, and the display panel is opposite to the display side of the display area. It is bent in the direction and fixed to the support member.

  In addition, for example, the support member includes a surface having a shape substantially the same as an area including the display area and the non-display area of the display panel, and a side surface located around the surface, and the display panel The display area and the non-display area may be disposed on the surface of the support member, and the drawer area of the display panel may be disposed on the side surface of the support member.

(Embodiment)
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. However, the present invention is naturally not limited to these forms, and numerical values, shapes, and materials shown in the following embodiments. The component, the arrangement position and connection form of the component, the process, the order of the process, etc. are examples, and the configuration not described in the independent claim indicating the highest concept among the components in the following embodiments Elements are described as optional components.

  In addition, in each figure, about the substantially same component, the same code | symbol is attached | subjected. Each figure is a mimetic diagram and is not necessarily illustrated strictly.

[Display panel]
A display panel according to an embodiment of the present invention will be described with reference to FIGS. 1A and 1B. FIG. 1A is a diagram schematically showing a schematic configuration of a display panel according to an embodiment of the present invention, and shows a state of a flat display panel before being bent.

  As shown in FIG. 1A, the display panel 10 is positioned outside the display area 1, the first side 2a, the second side 2b, the third side 2c, and the fourth side 2d. A non-display area 3 surrounded by an extension line of each side (first side 2a, second side 2b, third side 2c, fourth side 2d), and non-display area 3 with each side as a boundary And lead-out regions 4a, 4b, 4c, and 4d projecting outward. The display panel 10 realizes a shape suitable for the tiling method by bending the lead-out regions 4a, 4b, 4c, and 4d in a direction opposite to the display side of the display region 1.

  In the display area 1, for example, 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. The display panel 10 is not limited to a display panel that performs color display, and may be a display panel that performs monochrome display.

  The non-display area 3 is formed in a frame shape corresponding to the four sides of the display area 1 so as to surround the display area 1. For example, in order to supply power and various control signals to each color pixel arranged in the display area 1. Wiring and the like are formed. The display panel 10 forms substantially the same surface in the display area 1 and the non-display area 3.

  The lead-out areas 4a, 4b, 4c, and 4d are located adjacent to the outside of the non-display area 3 with the first side 2a, the second side 2b, the third side 2c, and the fourth side 2d as boundaries. For example, wiring for supplying power and various control signals from the outside of the display panel 10 to the wiring in the non-display area 3 is formed. The lead-out areas 4a, 4b, 4c, and 4d are in the vicinity of the first side 2a, the second side 2b, the third side 2c, and the fourth side 2d, and are opposite to the display side of the display area 1. Folded in the direction.

  In the present embodiment, the shape of each of the drawer regions 4a, 4b, 4c, and 4d in plan view is such that the drawer regions 4a, 4b, 4c, and 4d do not overlap each other when the display panel 10 is bent. It is almost trapezoidal. The shape of the extraction regions 4a, 4b, 4c, and 4d is not limited to a substantially trapezoidal shape. For example, the first side 2a, the second side 2b, the third side 2c, and the fourth side 2d are one side. The rectangular lead-out regions 4a, 4b, 4c, and 4d may be used.

  Further, the display panel 10 includes a notch portion 5a formed between the first side 2a and the second side 2b, and a notch formed between the second side 2b and the third side 2c. A portion 5b, a cutout portion 5c formed between the third side 2c and the fourth side 2d, and a cutout portion 5d formed between the fourth side 2d and the first side 2a. Have. That is, the non-display area 3 includes the four sides including the first side 2a, the second side 2b, the third side 2c, and the fourth side 2d, and the notches 5a, 5b, 5c, and 5d. Surrounded.

  A detailed cross-sectional structure of the display panel 10 will be described later, but will be briefly described with reference to FIG.

  The display panel 10 includes a first substrate 11 located on the light extraction side that is the display side of the display region 1, and a second substrate 12 that faces the first substrate 11, and includes the first substrate 11 and the first substrate 11. The organic EL layer 14 (electro-optical layer) is sandwiched between the two substrates 12. Specifically, the first substrate 11 is provided in the display area 1, the non-display area 3, and the extraction areas 4 a, 4 b, 4 c, and 4 d and is located on the light extraction side that is the display side of the display area 1. . The second substrate 12 is provided in the display area 1, the non-display area 3, and the extraction areas 4 a, 4 b, 4 c, and 4 d, and is positioned to face the first substrate 11. The organic EL layer 14 is provided in the display region 1 and is sandwiched between the first substrate 11 and the second substrate 12.

  Next, the structure of the above-described notches 5a, 5b, 5c, and 5d will be specifically described.

  FIG. 1B is an enlarged view of a portion where the extension line of the first side 2a of the display panel 10 and the extension line of the second side 2b of FIG. 1A intersect.

  As shown in FIG. 1B, the non-display area 3 is located at the first corner located between the first side 2a and the second side 2b than on the extension line of the first side 2a and the second side 2b. It has a notch 5a located on the display area 1 side. In other words, the first side 2a and the second side 2b are adjacent to each other through the notch 5a.

  That is, the non-display area 3 is located between the first side 2a and the second side 2b, and is more display area than the intersection P1 between the extension line of the first side 2a and the extension line of the second side 2b. It has a notch 5a formed on one side.

  Thereby, when the display panel 10 is bent, the stress applied to the first corner located between the first side 2a and the second side 2b can be relaxed. The first corner corresponds to the periphery of the corner formed by the extension line of the first side 2a and the extension line of the second side 2b. That is, it is a corner of the non-display area 3 in a state where the notch 5a is not formed. That is, it is the vicinity of the notch part 5a in the state in which the notch part 5a was formed.

  Specifically, the display panel 10 according to the present embodiment has the first side compared to the case where the first side 2a and the second side 2b are in contact with each other without providing the notch 5a. Since the notch 5a is formed between 2a and the second side 2b, the end of the first side 2a on the second side 2b side and the first side of the second side 2b The stress applied to the end on the side 2a side can be relaxed. That is, the stress applied in the vicinity of the notch 5a can be relaxed. As a result, the display panel 10 is distorted by applying a strong stress, and as a result, defects such as breakage of the display panel 10 can be reduced and reliability can be improved.

  Although the cutout portion 5a has been described here, the other cutout portions 5b, 5c, and 5d have the same structure. Specifically, as described above, the display panel 10 includes the second side 2b and the third side 2c, the third side 2c and the fourth side 2d, and the fourth side 2d and the first side 2a. Notches 5b, 5c, and 5d formed at each corner located between the respective sides. That is, the notch 5b is formed on the display region 1 side from the intersection of the extension line of the second side 2b and the extension line of the third side 2c, and the notch part 5c is formed on the third side 2c. The notch 5d is formed on the display area 1 side from the intersection of the extension line and the extension line of the fourth side 2d, and the notch 5d is the intersection of the extension line of the fourth side 2d and the extension line of the first side 2a. Rather than the display area 1 side.

  In addition, the shape of the notches 5a, 5b, 5c, and 5d is not particularly limited as long as it can relieve stress applied to the corners located between the sides. For example, the shape of the notch 5a may be a shape as shown in FIG.

  Further, the structure of the cutout portion 5a includes a non-display area on a straight line from the intersection point P1 between the extension line of the first side 2a and the extension line of the second side 2b to the nearest corner P2 of the display area 1. 3, the portion where the notch 5a is present is shorter than the portion where the notch 5a is not present, and the portion where the notch 5a is not present does not cause deterioration of the organic EL layer 14 due to moisture permeation from the side. The length will be secured.

  That is, a straight line from the intersection P1 of the extension line of the first side 2a and the extension line of the second side 2b to the angle P2 closest to the intersection point P1 among the plurality of corners of the display area (hereinafter, line segment P1-P2). In the above, the range in which the notch 5a is formed is shorter than the range in which the notch 5a is not formed. That is, in the line segment P1-P2, when the length of the range where the notch 5a is formed is W1, and the length of the range where the notch 5a is not formed is W2, W1 <W2 is satisfied.

  Thereby, the distance from the end surface of the display panel 10 to the display area 1 can be secured, and the intrusion of moisture from the notch 5a to the display area 1 can be suppressed.

  Further, the length W1 of the range in which the notch 5a is formed in the line segment P1-P2 varies depending on the constituent material of the display panel 10. For example, the lower the flexibility of the constituent material of the display panel 10, the more easily stress is applied when the lead-out regions 4a, 4b, 4c, 4d are bent. Therefore, in order to reduce the breakage of the display panel 10 due to stress, it is necessary to increase the length W1 of the range where the notch 5a is formed in the line segment P1-P2.

  For example, when the width of the non-display area 3 between the display area 1 and each extraction area (extraction areas 4a, 4b, 4c, 4d) is 250 μm, the range in which the notch 5a is formed in the line segment P1-P2. Is set as follows with respect to the length W1 + W2 of the line segment P1-P2. For example, when the first substrate 11 is 30 μm thick polyimide, W1 / (W1 + W2) is 20%, and when the first substrate 11 is 70 μm thick polyethylene naphthalate, W1 / (W1 + W2) is 50%. And

  As will be described in detail later, when an organic EL panel is used as the display panel 10, a sealing layer 16 for protecting the organic EL layer 14 from moisture is formed as shown in FIG. Depending on the sealing performance of the 16 materials, the length W1 of the range where the notch 5a is formed in the line segment P1-P2 may be changed. Specifically, the higher the sealing performance of the sealing layer 16, the shorter the length W1 of the range where the notch 5a is formed in the line segment P1-P2.

  Further, as shown in FIG. 1B, the notch portion 5 a includes a notch portion 51 (first substrate notch portion) formed on the first substrate 11 and a notch formed on the second substrate 12. Part 52 (second substrate cutout part), and the area of the cutout part 51 formed in the first substrate 11 is larger than the cutout part 52 formed in the second substrate 12.

  Thereby, when the display panel 10 is bent, the stress applied to the first corner located between the first side 2a and the second side 2b can be further relaxed. Specifically, when the display panel 10 is bent, the stress applied to the first substrate 11 is greater than the stress applied to the second substrate 12. Therefore, the stress applied to the first substrate 11 can be further relaxed by making the area of the notch 51 larger than the area of the notch 52. As a result, the first corner (near the notch 5a) and the second corner (near the notch 5b) are compared with the case where the area of the notch 51 and the area of the notch 52 are the same. The stress applied to the third corner (near the notch 5c) and the fourth corner (near the notch 5d) can be further relaxed.

  Here, the area of the cutout portion 51 formed in the first substrate 11 is an extension line of the first side 2a in the cutout portion 5a when viewed in plan before the display panel 10 is bent. And the extension line of the second side 2b and the contour line of the first substrate 11. The area of the notch 52 formed in the second substrate 12 is the extension of the first side 2a in the notch 5a when viewed in plan before the display panel 10 is bent. This is an area surrounded by the extended line of the second side 2 b and the outline of the second substrate 12.

  In addition, as shown in FIG. 1B, the first substrate 11 has a smaller area than the second substrate 12 in the non-display area 3 and the extraction areas 4a and 4b, and the notched portion 52 is not formed. Is formed. That is, when viewed from the display side of the display area 1 in a state before the display panel 10 is bent, the second substrate 12 is visually recognized from the periphery of the first substrate 11 in the vicinity of the notch portion 5a. In other words, the outline of the first substrate 11 and the outline of the second substrate 12 do not overlap. In addition, although FIG. 1B demonstrated the notch part 5a, it is the same also about the other notch parts 5b, 5c, and 5d.

  As a result, the end of the notch formed in the first substrate 11 and the end of the notch formed in the second substrate 12 do not overlap, so the notches 5a, 5b, 5c, The stress applied to the vicinity of 5d (first to fourth corners) can be further relaxed.

  As described above, the display panel 10 according to the present embodiment includes the rectangular display area 1 in which a plurality of pixels are formed, the non-display area 3 located adjacent to the outside of the display area 1, and the first display area 10. It includes drawer areas 4a, 4b, 4c, and 4d that are adjacent to the outside of the non-display area 3 with the side 2a, the second side 2b, the third side 2c, and the fourth side 2d as boundaries. The regions 4a, 4b, 4c, and 4d are bent in the direction opposite to the display side of the display region 1 near the boundary with the non-display region 3, and the non-display region 3 has notches 5a, 5b, 5c, and 5d. .

  Thereby, when the display panel 10 bends the drawer regions 4a, 4b, 4c, and 4d, the first corner, the second side 2b, and the second side located between the first side 2a and the second side 2b are bent. A second corner located between the third side 2c, a third corner located between the third side 2c and the fourth side 2d, and a position between the fourth side 2d and the first side 2a. The stress applied to the fourth corner can be relaxed. As a result, breakage of the display panel 10 at each corner (first corner, second corner, third corner, and fourth corner) can be suppressed. Therefore, the display panel 10 can reduce defects and improve reliability.

  In the present embodiment, the shape of the display area 1 is a quadrangle (for example, a substantially square), but may be a polygon such as a triangle or a hexagon. In other words, the shape of the display region 1 is a shape that does not cause a gap between the display panels 10 when the display panels 10 are arranged side by side with the lead-out regions 4a, 4b, 4c, and 4d folded. Other shapes can be used.

  In the above description, the shape of the notch 5a is not limited to the shape shown in FIG. 1B, but may be the shape shown in FIG. 2, for example. However, in the state where the display panel 10 is viewed in plan view, It is desirable that an angle formed between each of the sides forming the notch 5a and the line segment P1-P2 is less than 90 °. Specifically, as shown in FIG. 2, an angle θ <b> 1 formed by each of the sides forming the notch 51 of the first substrate 11 and the line segment P <b> 1-P <b> 2 and the notch of the second substrate 12. The angle θ2 formed by each of the sides forming the portion 52 and the line segment P1-P2 is preferably less than 90 °.

  Thereby, the distance from the edge part of the display area 1 to the edge part of the display panel 10 can be ensured, and the deterioration of the organic EL layer 14 due to moisture entering the organic EL layer 14 from the notch part 5a. Can be suppressed more reliably.

  Next, each component of the display panel 10 will be described in detail with reference to FIG. In the present embodiment, a top emission type organic EL panel with a passive matrix driving method will be described as an example of the display panel 10, but the present invention is not limited to this.

  As shown in FIG. 3, the display panel 10 is formed on the second substrate 12 made of a flexible material, the light-impermeable electrode wiring 13 formed on the second substrate 12, and the electrode wiring 13. The organic EL layer 14, which is an electro-optical layer including a light emitting layer, and the electrode wiring 15 formed on the organic EL layer 14, is an organic EL composed of the electrode wiring 13, the organic EL layer 14, and the electrode wiring 15. The element 18 is configured to be sealed by the sealing layer 16 and the first substrate 11. Note that the first substrate 11 which is the light extraction side substrate which is the display side of the display area 1 is also made of a flexible material.

  The first substrate 11 and the second substrate 12 may be any substrate having flexibility, for example, polyester such as polyethylene terephthalate, polyethylene naphthalate or polybutylene terephthalate, cellulose such as triacetyl cellulose or diacetyl cellulose. Resin, polyethylene, polycarbonate, polyarylate, polysulfone, polyethersulfone, polyetherimide, polyimide, polyolefin, or acrylic resin such as polymethyl methacrylate can be used. Moreover, as the 1st board | substrate 11 and the 2nd board | substrate 12, the transparent resin substrate which consists of other transparent resin can be used.

  As described above, the display panel 10 that is an organic EL panel has a configuration in which the electrode wiring 13, the organic EL layer 14, and the electrode wiring 15 are sequentially laminated on one surface of the second substrate 12 as shown in FIG. 3. The sealing layer 16 is formed and sealed so as to cover the organic EL layer 14 and the electrode wiring 15.

  The electrode wiring 13 functions as, for example, an anode, and although not shown, a plurality of electrode wirings 13 are formed in the column direction in the display region 1. The electrode wiring 15 functions as, for example, a cathode, and a plurality of electrode wirings 15 are formed in the row direction in the display region 1. That is, the electrode wiring 13 and the electrode wiring 15 are formed orthogonally.

  One end of each of the electrode wiring 13 and the electrode wiring 15 extends beyond the display area 1 to the non-display area 3 and further to the lead-out areas 4a, 4b, 4c, and 4d. The exposed portions at the end portions function as electrode terminals. However, the present invention is not limited to this, and it is only necessary that an electrode terminal is formed at any one of the panel end portions of the four extraction regions 4a, 4b, 4c, and 4d.

  The electrode wiring 13 is preferably formed of a material having a low work function. For example, a metal such as Al, Ca, or Mg, a compound thereof, or an alloy containing them can be used. Further, in the top emission type organic EL panel, since it is necessary to extract light through the electrode wiring 15 which is the upper electrode, the electrode wiring 15 is preferably transparent to the light from the organic EL element 18. The electrode wiring 15 is preferably formed of a material having a high work function. For example, a conductive material such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), ZnO (zinc oxide), or SnO (tin oxide). A transparent electrode made of a conductive oxide, or a thin wire electrode made of a metal such as Cr, Mo, Ni, Pt, Au or a compound thereof, or an alloy containing them can be used.

  The organic EL layer 14 can be formed by a general method. The organic EL layer 14 is often formed of a plurality of layers. For example, an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, and the like are formed from the lower layer. In some cases, a hole injection layer is provided between the hole transport layer and the electrode wiring 15 as the upper electrode. On the organic EL layer 14, an electrode wiring 15 is formed.

  A general material can also be used for the material of each layer of the organic EL layer 14, for example, the following materials can be used.

  As the electron transporting layer, a material that exhibits electron transporting properties and easily forms a charge transfer complex by co-evaporation with an alkali metal can be used. For example, tris (8-quinolinolato) aluminum, tris (4-methyl-8-quinolinolato) ) Aluminum, bis (2-methyl-8-quinolinolato) -4-phenylphenolate-aluminum, metal complexes such as bis (2- (2-hydroxyphenyl) benzoxazolate) zinc and 2- (4-biphenylyl) -5- (4-tert-butylphenyl) -1,3,4-oxydiazole, 1,3-bis (5- (p-tert-butylphenyl) -1,3,4-oxydiazole-2 -Yl) benzene and the like can be used.

  The electron injection layer can be formed by co-evaporating a material that exhibits an electron donating property with respect to the substance used for the electron transport layer. Examples of materials that exhibit electron donating properties include alkali metals such as lithium and cesium, alkaline earth metals such as magnesium and calcium, and metals such as rare earth metals, or oxides, halogen compounds, and carbonates thereof. You can choose.

  Examples of the hole transport layer include tetraarylbenzidine compounds (triphenyldiamine: TPD), aromatic tertiary amines, hydrazone derivatives, carbazole derivatives, triazole derivatives, imidazole derivatives, oxadiazole derivatives having amino groups, and polythiophene derivatives. Copper phthalocyanine derivatives and the like can be used.

  As the material for the light emitting layer, a host material having the ability to transport electrons and holes and a dopant that emits fluorescence or phosphorescence by recombination thereof may be used. For example, Tris (8-quinolinolato) is used as the host. ) Aluminum, bis (8-ninolinolato) magnesium, bis (benzo {f} -8-quinolinolato) zinc, bis (2-methyl-8quinolinolato) aluminum oxide, tris (8-quinolinolato) indium, tris (5-methyl-) 8-quinolinolato) aluminum, 8-quinolinolatolithium, tris (5-chloro-8-quinolinolato) gallium, bis (5-chloro-8-quinolinolato) calcium, 5,7-dichloro-8-quinolinolato aluminum, Tris (5,7-dibromo-8-hydroxyquinolinolato) Aluminum, poly - complexes, anthracene derivatives such as (zinc (II) bis (8-hydroxy-5-quinolinyl) methane), a carbazole derivative, or the like can be used.

  In addition, the dopant captures electrons and holes in the host to recombine and emits light. For example, in the light emitting layer corresponding to red, it corresponds to a pyran derivative, and in the light emitting layer corresponding to green, it corresponds to a coumarin derivative and blue. The light emitting layer may be a fluorescent substance such as an anthracene derivative, or a phosphorescent substance such as an iridium complex or a pyridinate derivative.

  Note that a bank 17 is formed between the pixel (sub-pixel) and the pixel (sub-pixel) so that the organic EL layer 14 is less likely to be broken due to breakage at the end. The bank 17 may be formed of an organic material or may be formed of an inorganic material such as SiN. When an organic material is used as the material of the bank 17, it is generally formed of an acrylic resin.

  The electrode wiring 15 is formed on the organic EL layer 14 and the bank 17 by vapor deposition or sputtering. Moreover, since the light emission efficiency is lowered when moisture is present in the organic EL layer 14, the sealing layer 16 is formed to protect the organic EL layer 14 from moisture. For example, the sealing layer 16 is relatively moisture-proof such as inorganic materials such as silicon nitride (SiNx), silicon nitride oxide (SiOxNy), aluminum oxide (AlOx), and aluminum nitride (AlNx), and polyparaxylylene. It is formed into a thin film using a high organic material.

  The display panel 10 configured as described above can be manufactured, for example, as follows.

  First, a conductive thin film serving as a material for the electrode wiring 13 is formed on the second substrate 12, and the conductive thin film is patterned by photolithography, etching, or the like, whereby a plurality of electrode wirings 13 having a predetermined shape are formed. Form.

  Next, a plurality of thin films such as an electron injection layer, an electron transport layer, a light emitting layer, and a hole transport layer are sequentially stacked on the upper surface of the electrode wiring 13 by using, for example, a vapor deposition method to form the organic EL layer 14. . Thereafter, after further forming a plurality of electrode wirings 15 by using a vapor deposition method, a sealing layer 16 is formed on the entire surface and sealed by using a plasma CVD method or the like.

  In the present embodiment, an organic EL panel of a passive matrix driving system is used as the display panel 10, but the present invention is not limited to this. For example, as the display panel 10, an active matrix driving type organic EL panel may be used. In this case, a switching TFT for selecting a pixel is provided for each pixel between the second substrate 12 and the electrode wiring 13. In this case, a passivation film may be formed to further protect the TFT. Even if the TFT is not provided, a passivation film may be formed in order to planarize the surface on which the organic EL layer 14 is formed.

  As described above, according to the display panel 10 in the present embodiment, at the corners located between the sides surrounding the non-display area 3, the cuts located on the display area 1 side with respect to the extended lines of the sides and the sides. It has notches 5a, 5b, 5c, 5d. As a result, when the lead-out regions 4a, 4b, 4c, and 4d are bent in the direction opposite to the light extraction side of the display region 1 in the vicinity of the boundary with the non-display region 3, the sides and sides of the non-display region 3 are surrounded. Since the stress applied to the corners located between them can be relieved, the first substrate 11 and the sealing layer 16 that are generated at each corner can be hardly cracked. As a result, it is possible to suppress deterioration of the organic EL element 18 due to moisture intrusion from the cracked portions of the first substrate 11 and the sealing layer 16 and improve reliability.

[Display device]
Next, a display device according to an embodiment of the present invention using the display panel 10 will be described with reference to FIG. 4A is a plan view showing the configuration of the display device according to the embodiment of the present invention, and FIG. 4B is a diagram of the display device taken along the line aa in FIG. It is a sectional side view.

  As shown in FIG. 4A, the outer shape of the display device 20 is substantially the same as the quadrangle of the display area 1 in plan view. Specifically, the non-display area 3 is visually recognized corresponding to the four sides of the display area 1 so as to surround the display area 1. In addition, the first side 2a, the second side 2b, the third side 2c, and the fourth side 2d that surround the non-display area 3 together with the notches 5a, 5b, 5c, and 5d are defined as boundaries of the non-display area. The drawer regions 4a, 4b, 4c, and 4d located adjacent to the outside are visually recognized. Here, since the widths of the non-display area 3 and the extraction areas 4a, 4b, 4c, and 4d are small, the outer shape of the display device 20 is observed in substantially the same manner as the square of the display area 1 in plan view. This is because, as shown in FIG. 4B, the lead-out areas 4a, 4b, 4c, and 4d are bent in the direction opposite to the display side of the display area 1 near the boundary with the non-display area 3. Realized.

  Further, as shown in FIG. 4B, the lead-out areas 4a, 4b, 4c, and 4d are curved toward the direction opposite to the display side of the display area 1 near the boundary with the non-display area 3. Is bent. Thereby, the stress applied to the display panel 10 can be relaxed as compared with the case where the lead-out regions 4a, 4b, 4c, and 4d are bent without being bent (for example, when bent at a right angle).

  As shown in FIGS. 4A and 4B, the display device 20 according to the embodiment of the present invention includes the display panel 10 described above and a support member 21a for fixing (supporting) the display panel 10. 21b. The support member 21a is provided with a screw 22, and the support member 21b is provided with a through-hole through which the screw 22 is inserted. Specifically, first, each of the pull-out areas 4a, 4b, 4c, and 4d of the display panel 10 covers the entire support member 21a in the direction opposite to the light extraction side of the display area 1 near the boundary with the non-display area 3. The screw 22 provided in the support member 21 a is passed through the through hole of the support member 21 b, and the display panel 10 is pressed and held by the nut 23. The head of the screw 22 is preferably embedded in the support member 21a in order to avoid adverse effects on the display panel 10. Further, the position of the screw 22 preferably takes into account the width of the sealing member of the display panel 10 and the arrangement relationship of the electrodes.

  In the embodiment of the present invention, the display panel 10 is fixed to the support members 21a and 21b by the method described above, but the present invention is not limited to this.

  Further, the shape of the planar area of the support member 21 a is substantially the same as the area composed of the display area 1 and the non-display area 3 of the display panel 10. Further, the support member 21a has side surfaces located around the surface.

  FIG. 5 is an enlarged view of a corner portion of the display device 20. As shown in FIG. 5, the display device 20 according to the embodiment of the present invention is on an extension line of each side and side at a corner located between each side surrounding the non-display area 3 in the display panel 10. It has notches 5a, 5b, 5c, and 5d located on the display area 1 side. Thereby, when the display panel 10 is bent and fixed to the support member 21a, the notches 5a, 5b, 5c, and 5d exist on the four corners of the support member 21a. Therefore, by relaxing the stress applied to each corner of the display panel 10, the first substrate 11 and the sealing layer 16 can be prevented from cracking. As a result, it is possible to suppress deterioration of the organic EL element 18 due to moisture intrusion from the cracked portions of the first substrate 11 and the sealing layer 16 and improve reliability.

  In this Embodiment, the edge part of the drawer | drawing-out area | region 4a, 4b, 4c, 4d located in the back surface of the supporting member 21a is pressed by the supporting member 21b at the supporting member 21a side. As a result, the restoring force of the display panel 10 due to the bending is evenly applied to the opposite end portions of the support member 21b, so that the display panel 10 can be easily held. Therefore, the display panel 10 is firmly supported and fixed by the support members 21a and 21b in a bent state. In the display panel 10, the bent state means that the display area 1, which is a substantially flat surface of the display panel 10, has a convex portion that bulges outward at an angle larger than 0 degrees, and is bent at least at one place. Means that.

  In the present embodiment, the thickness of the support member 21a is larger than the thickness of the support member 21b. If the thickness of the support member 21a itself is too thin, the display panel 10 may be broken when the display panel 10 is bent to the back surface of the support member 21a. The thickness of the support member 21a is at least twice the radius of curvature that the display panel 10 can withstand bending. In addition, the material of the support members 21a and 21b is not particularly limited. For example, a resin such as acrylic or a metal such as aluminum can be used.

  Further, in order to support the fixation between the display panel 10 and the support member 21a, an adhesive or a non-slip sheet is attached between the non-light extraction side of the display panel 10 and the display panel side of the support member 21a in the display area 1. May be attached.

  In the embodiment of the present invention, the contour of the cross section of the corner portion of the support member 21a has a predetermined radius of curvature. Since the corners of the support member 21a have a predetermined radius of curvature, the bent portions of the display panel 10 can be bent by bending the lead-out regions 4a, 4b, 4c, and 4d of the display panel 10 along the corners of the support member 21a. The radius of curvature can be defined. Furthermore, it is possible to control the widths of the extraction regions 4a, 4b, 4c, and 4d that are observed when the display device 20 is viewed in plan from the display side. Further, by setting the radius of curvature to a value at which the display panel 10 can be bent, it is possible to make it difficult to damage the substrate (the first substrate 11 and the second substrate 12) or the electrode wiring in the display panel 10. .

  As described above, the display device 20 according to the present embodiment includes the display panel 10 and the support member 21a to which the display panel 10 is fixed. The display panel 10 has a direction opposite to the display side of the display area 1. And is fixed to the support member 21a. Further, the support member 21a has a surface having substantially the same shape as an area composed of the display area 1 and the non-display area 3 of the display panel 10 and side surfaces positioned around the surface, and the display area of the display panel 10 1 and the non-display area 3 are arranged on the surface of the support member 21a, and the lead-out areas 4a, 4b, 4c and 4d of the display panel 10 are arranged on the side surface of the support member 21a.

  In the above configuration, the lead areas 4a, 4b, 4c, and 4d are bent near the boundary with the non-display area 3. However, the bending start positions of the lead areas 4a, 4b, 4c, and 4d that are bent into a curved shape are used. Rs may be in contact with the first side 2a, the second side 2b, the third side 2c, and the fourth side 2d.

  Thereby, the drawer | drawing-out area | region 4a, 4b, 4c, 4d observed when the display panel 10 is planarly viewed from the display side can be made the smallest. That is, the joints when tiling using a plurality of display panels 10 can be made more inconspicuous.

  In the above description, the lead areas 4a, 4b, 4c, and 4d are bent into a curved shape from the vicinity of the boundary with the non-display area 3, but the boundary vicinity is the boundary itself, that is, the first side 2a, the first side. 2 side 2b, 3rd side 2c, and 4th side 2d are included. Further, the vicinity of the boundary may be separated from the boundary by the thickness of the display panel 10, the thickness of the first substrate 11, the thickness of the second substrate 12, or the like.

  Although the display panel and the display device according to the present invention have been described based on the embodiments, the present invention is not limited to the above-described embodiments. Unless it deviates from the meaning of this invention, what made the various deformation | transformation which those skilled in the art conceivable to this Embodiment is also contained in the scope of the present invention.

  Further, by combining a plurality of display devices 20 as described above in a matrix and fixing the plurality of display devices 20 to the housing 30, a display 100 having one large display screen as shown in FIG. It is possible to configure.

  As described above, the display panel according to the present invention can be applied to a display device such as a display device or a lighting device. In particular, it is useful for realizing a large display by joining together small display panels.

DESCRIPTION OF SYMBOLS 1 Display area 2a 1st edge | side 2b 2nd edge | side 2c 3rd edge | side 2d 4th edge | side 3 Non-display area | region 4a, 4b, 4c, 4d Pull-out area | region 5a, 5b, 5c, 5d, 51, 52 Notch DESCRIPTION OF SYMBOLS 10 Display panel 11 1st board | substrate 12 2nd board | substrate 13 Electrode wiring 14 Organic EL layer 15 Electrode wiring 16 Sealing layer 17 Bank 18 Organic EL element 20 Display apparatus 21a, 21b Support member 22 Screw 23 Nut 100 Display

Claims (10)

  1. A polygonal display area in which a plurality of pixels are formed;
    A non-display area located adjacent to the outside of the display area;
    A plurality of sides including a first side and a second side adjacent to each other, and a lead-out region located adjacent to the outside of the non-display region,
    The lead-out area is bent in the direction opposite to the display side of the display area near the boundary with the non-display area,
    The non-display area is located between the first side and the second side, and is closer to the display area than the intersection of the extension line of the first side and the extension line of the second side. Having a notch formed,
    Display panel.
  2. The notch is formed on a straight line from an intersection of the extension line of the first side and the extension line of the second side to a corner closest to the intersection among a plurality of corners of the display area. The range is shorter than the range where the notch is not formed,
    The display panel according to claim 1.
  3. The display panel is
    A first substrate provided in the display area, the non-display area, and the lead-out area, and located on a light extraction side that is a display side of the display area;
    A second substrate provided in the display region, the non-display region, and the lead-out region, and positioned opposite to the first substrate;
    An electro-optic layer provided in the display area and sandwiched between the first substrate and the second substrate;
    The display panel according to claim 1.
  4. The notch is
    A first substrate notch formed in the first substrate;
    A second substrate notch formed in the second substrate,
    An area of the first substrate notch is larger than an area of the second substrate notch,
    The display panel according to claim 3.
  5. The first substrate has a smaller area than the second substrate in the non-display region and the lead-out region, and is formed in a region where the second substrate cutout portion is not formed.
    The display panel according to claim 4.
  6. The drawer region is bent into a curved shape,
    The bending start position of the curved shape is in contact with the first side and the second side,
    The display panel according to claim 1.
  7. The display area has a rectangular shape,
    The non-display area surrounds the display area and is surrounded by the four sides including the first side and the second side and the cutout portion.
    The display panel according to claim 1.
  8. The four sides are the first side, the second side, the third side adjacent to the second side, and the fourth side adjacent to the first side and the third side. Including
    The display panel is between the second side and the third side, between the third side and the fourth side, and between the fourth side and the first side. , Respectively, the intersection of the extension line of the second side and the extension line of the third side with respect to the display area side, the extension line of the third side and the extension line of the fourth side A cutout is formed on the display area side of the display area side, the intersection of the extension line of the fourth side and the extension line of the first side,
    The lead-out area is composed of four independent areas located adjacent to the outside of the non-display area with the first to fourth sides as boundaries.
    The display panel according to claim 7.
  9. The display panel according to claim 1, and a support member to which the display panel is fixed, wherein the display panel is bent in a direction opposite to the display side of the display area. Fixed to the support member
    Display device.
  10. The support member has a surface that has substantially the same shape as an area composed of the display area and the non-display area of the display panel, and a side surface that is located around the surface.
    The display area and the non-display area of the display panel are disposed on the surface of the support member, and the drawer area of the display panel is disposed on the side surface of the support member.
    The display device according to claim 9.
JP2013000684A 2013-01-07 2013-01-07 Display panel and display device using the same Pending JP2014132319A (en)

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EP3174033A4 (en) * 2014-09-02 2018-06-20 Shenzhen Royole Technologies Co. Ltd. Display module and electronic device having said display module
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