WO2019097850A1

WO2019097850A1 - Display device

Info

Publication number: WO2019097850A1
Application number: PCT/JP2018/035807
Authority: WO
Inventors: 浅田　智
Original assignee: 株式会社ジャパンディスプレイ
Priority date: 2017-11-17
Filing date: 2018-09-26
Publication date: 2019-05-23
Also published as: JP2019095472A

Abstract

A display device according to one embodiment is provided with: a first resin substrate which is flexible; a plurality of pixels disposed above the first resin substrate; a plurality of scanning lines which extend in a display region including the plurality of pixels; and a plurality of signal lines which extend in the display region and intersect the plurality of scanning lines. The first resin substrate includes a filamentous first resin layer, and a plate-shaped second resin layer which covers at least a side surface of the first resin layer.

Description

Display device

Embodiments of the present invention relate to a display device.

Conventionally, in display devices such as liquid crystal display devices and organic electroluminescent display devices, glass substrates are used as the substrates of display panels. In recent years, a display device in which flexibility is given to a display panel has been developed by using a resin base for the base of the display panel.

At the time of manufacturing such a display panel, a resin substrate is formed on a glass substrate. Then, after various insulating layers, electrodes, and wirings are formed on the resin base, the resin base is peeled off from the glass substrate.

By peeling from the glass substrate, the resin substrate loses the support and slightly expands and contracts. If this expansion and contraction is not uniform throughout the resin substrate, distortion of the display surface or pitch deviation of the terminal portion on which the IC or wiring board is mounted may occur. In addition, in a manufacturing method in which elements corresponding to a plurality of display panels are formed on a resin substrate formed on a mother glass, and the resin substrates are peeled off from the mother glass and then individual display panels are cut out. May break the cutting line.

Furthermore, in the case where resin substrates are used for both the array substrate and the counter substrate of the liquid crystal display device, if the expansion and contraction of each resin substrate differs depending on the location, wiring of the array substrate and pixel electrodes There is a possibility of shifting. When such a shift occurs, color mixing may occur between adjacent pixels.

Japanese Patent Application Laid-Open No. 11-231325 JP, 2015-26055, A

One of the objects of the present disclosure is to prevent a failure due to the expansion and contraction of a resin substrate in a display device including a flexible resin substrate.

The display device according to one embodiment includes a plurality of flexible first resin substrates, a plurality of pixels disposed above the first resin substrate, and a plurality of scans extending to a display area including the plurality of pixels. And a plurality of signal lines extending to the display area and intersecting the plurality of signal lines. The first resin base includes a linear first resin layer and a plate-like second resin layer covering at least a side surface of the first resin layer.

FIG. 1 is a plan view showing a configuration example of a display device in the first embodiment. FIG. 2 is a view showing an example of a cross section of a display panel provided in the display device. FIG. 3 is a schematic plan view showing the shapes of the first resin layer and the third resin layer provided in the display panel. FIG. 4 is a plan view schematically showing the vicinity of the intersection of the first resin layer. FIG. 5 is a schematic plan view of a mother glass on which a first substrate of the display panel is formed. FIG. 6 is a schematic cross-sectional view of a display panel cut out from the mother glass. FIG. 7 is a schematic cross-sectional view showing the manufacturing process subsequent to FIG. FIG. 8 is a schematic cross-sectional view showing the manufacturing process subsequent to FIG. FIG. 9 is a schematic cross-sectional view showing the manufacturing process continued from FIG. FIG. 10 is a schematic plan view of the display panel in the second embodiment. FIG. 11 is a schematic plan view of the display panel in the third embodiment. FIG. 12 is a schematic plan view of the display panel in the fourth embodiment. FIG. 13 is a schematic plan view of the display panel in the fifth embodiment. FIG. 14 is a schematic plan view of the display panel in the sixth embodiment. FIG. 15 is a schematic plan view of the display panel in the seventh embodiment. FIG. 16 is a schematic cross-sectional view of the display panel in the eighth embodiment. FIG. 17 is a plan view showing a configuration example of a display device in the ninth embodiment. FIG. 18 is a diagram showing an example of a circuit configuration of a sub-pixel included in the display device. FIG. 19 is a view showing an example of a cross section of a display panel provided in the display device. FIG. 20 is a schematic plan view of the display panel.

Several embodiments will be described with reference to the drawings.
The disclosure is merely an example, and those that can be easily conceived of as appropriate changes while maintaining the gist of the invention are naturally included in the scope of the present invention. In addition, the drawings may be schematically represented as compared to the actual embodiment in order to clarify the description, but are merely examples and do not limit the interpretation of the present invention. In each of the drawings, reference numerals may be omitted for identical or similar elements arranged in succession. In addition, in the present specification and the drawings, components having the same or similar functions as those described above with reference to the drawings already described may be denoted by the same reference symbols, and overlapping detailed descriptions may be omitted.

In each embodiment, a liquid crystal display and an organic electroluminescence (EL) display are disclosed as an example of the display. However, each embodiment does not prevent the application of the individual technical idea disclosed in each embodiment to other types of display devices. As another type of display device, for example, an electronic paper type display device having an electrophoretic element or the like, a display device to which MEMS (Micro Electro Mechanical System) is applied, or a display device to which electrochromism is applied is assumed.

First Embodiment
FIG. 1 is a plan view showing a configuration example of a liquid crystal display device DSP1 (hereinafter referred to as a display device DSP1) according to the first embodiment. In the present embodiment, as illustrated, a first direction X, a second direction Y, and a third direction Z are defined. The respective directions X, Y and Z are directions orthogonal to each other in the present embodiment, but may intersect at angles other than perpendicular.

The display device DSP1 includes a display panel PNL1, a flexible circuit board FPC, and a controller CT. The display panel PNL1 includes a first substrate SUB1 (array substrate), a second substrate SUB2 (counter substrate), and a liquid crystal layer LC disposed between the substrates SUB1 and SUB2.

The display panel PNL1 has a display area DA in which the pixels PX are arranged in a matrix along the first direction X and the second direction Y, and a peripheral area SA around the display area DA. The peripheral area SA includes a terminal area TA in which a terminal T for external connection is disposed. In the illustrated example, the first substrate SUB1 is larger than the second substrate SUB2. The terminal area TA corresponds to an area where the first substrate SUB1 is exposed from the second substrate SUB2.

In the display area DA, the first substrate SUB1 includes a plurality of scanning lines G and a plurality of signal lines S intersecting the scanning lines G. The plurality of scanning lines G extend in the first direction X and are arranged in the second direction Y. The plurality of signal lines S extend in the second direction Y and are arranged in the first direction X.

An area divided by the adjacent scanning line G and the adjacent signal line S corresponds to the sub-pixel SP. The pixel PX includes a plurality of sub-pixels SP of different colors. For example, the pixel PX can be configured by red, green, and blue sub-pixels SP. The pixels PX may include sub-pixels SP of other colors, such as white sub-pixels SP. In the present disclosure, the sub-pixel SP may be simply referred to as a pixel.

The first substrate SUB1 includes the switching element SW and the pixel electrode PE disposed in each sub-pixel SP. Further, the first substrate SUB1 includes a common electrode CE facing the respective pixel electrodes PE. The common electrode CE may be disposed on the second substrate SUB2. The switching element SW is driven by the scanning line G and the signal line S. The pixel electrode PE is connected to the switching element SW. A common voltage is applied to the common electrode CE.

The first substrate SUB1 includes scanning line drivers GD1 and GD2 and a signal line driver SD. The scanning line drivers GD1 and GD2 supply scanning signals to the plurality of scanning lines G. The signal line driver SD supplies video signals to the plurality of signal lines S. In the example of FIG. 1, a plurality of scanning lines G are alternately connected to the scanning line drivers GD1 and GD2. As another example, the first substrate SUB1 may have only one of the scanning line drivers GD1 and GD2, and all the scanning lines G may be connected to the one.

The flexible circuit board FPC is connected to the terminal T. The controller CT is mounted on the flexible circuit board FPC. The controller CT controls the scanning line drivers GD1 and GD2 and the signal line driver SD. The controller CT may be mounted at a position different from the flexible printed circuit FPC, such as the terminal area TA, for example.

The first substrate SUB1 has a rectangular shape having a first side E11, a second side E12, a third side E13, and a fourth side E14. The second substrate SUB2 has a rectangular shape having a first side E21, a second side E22, a third side E23, and a fourth side E24. Each side E11, E12, E21, E22 is parallel to the second direction Y. Each side E13, E14, E23, E24 is parallel to the first direction X. The first sides E11 and E21 overlap each other. The second sides E12 and E22 overlap each other. The third sides E13 and E23 overlap each other. The fourth sides E14 and E24 are located on the terminal area TA side and are offset from each other. The first substrate SUB1 and the second substrate SUB2 are not limited to the rectangular shape as illustrated.

FIG. 2 is a view showing an example of a cross section along the first direction X of the display panel PNL1. Here, a part of the display area DA corresponding to one sub-pixel SP and a part of the peripheral area SA on the side of the first side E11, E21 are shown.

The first substrate SUB1 includes a flexible first resin base 10, a first insulating layer 13, a second insulating layer 14, a third insulating layer 15, a fourth insulating layer 16, and a first alignment film. A pixel electrode PE, a common electrode CE, a signal line S, and a metal wiring ML are provided.

The first resin base 10 has a first surface 10A and a second surface 10B parallel to each other. The first insulating layer 13 covers the first surface 10A. The second insulating layer 14 covers the first insulating layer 13. The signal line S is disposed on the second insulating layer 14. The scanning line G shown in FIG. 1 is disposed, for example, between the first insulating layer 13 and the second insulating layer 14. The third insulating layer 15 covers the signal line S and the second insulating layer 14. The common electrode CE is disposed on the third insulating layer 15. The metal wiring ML is disposed on the common electrode CE and is opposed to the signal line S. The fourth insulating layer 16 covers the metal interconnect ML and the common electrode CE. The pixel electrode PE is disposed on the fourth insulating layer 16. The first alignment film 17 covers the pixel electrode PE and the fourth insulating layer 16.

Each insulating

layer

13, 14, 16 is formed of, for example, an inorganic material. The third insulating layer 15 is formed of, for example, an organic material. The common electrode CE and the pixel electrode PE are formed of, for example, a transparent conductive material such as indium tin oxide (ITO).

The configuration of the first substrate SUB1 is not limited to the illustrated example. For example, the first substrate SUB1 may not include the metal wiring ML. Further, the positions of the pixel electrode PE and the common electrode CE may be switched, or the pixel electrode PE and the common electrode CE may be disposed in the same layer. The common electrode CE can also be disposed on the second substrate SUB2.

The second substrate SUB2 is provided with a flexible second resin base 20, a fifth insulating layer 23, a light shielding layer 24, a color filter 25, an overcoat layer 26, and a second alignment film 27. There is.

The second resin base 20 has a first surface 20A and a second surface 20B parallel to each other. The fifth insulating layer 23 is formed of, for example, an inorganic material, and covers the first surface 20A. The light shielding layer 24 is disposed below the fifth insulating layer 23. The color filter 25 covers the light shielding layer 24 and the fifth insulating layer 23. The overcoat layer 26 covers the color filter 25. The second alignment film 27 covers the overcoat layer 26.

The light shielding layer 24 overlaps the signal line S, the metal wiring ML, and the scanning line G in the display area DA, and has an opening corresponding to each sub-pixel SP. In addition, the light shielding layer 24 is disposed in the entire peripheral area SA.

The first substrate SUB1 and the second substrate SUB2 are bonded together by a frame-shaped sealing material SL disposed in the peripheral area SA. A liquid crystal layer LC is disposed in a space surrounded by the first alignment film 17, the second alignment film 27, and the sealing material SL.

The first polarizing plate PL1 is attached to the second surface 10B of the first resin base 10. The second polarizing plate PL2 is attached to the second surface 20B of the second resin base 20. When the display panel PNL1 is transmissive, a backlight is disposed below the first polarizing plate PL1. The display panel PNL1 may be a reflective type that displays an image using external light, or may have both transmissive and reflective functions.

Since the substrates of the substrates SUB1 and SUB2 are formed of a flexible resin material, the display panel PNL1 can be bent into any shape. For example, the terminal area TA may be bent so that the fourth side E14 shown in FIG. 1 is located below the first polarizing plate PL1. Also, other sides may be bent in the same manner.

The first resin base 10 includes a first resin layer 11 and a second resin layer 12. The first resin layer 11 is formed of, for example, polyimide. The second resin layer 12 is made of, for example, a different type of polyimide from the first resin layer 11. The Young's modulus of the first resin layer 11 is larger than the Young's modulus of the second resin layer 12.

The thickness T11 of the first resin layer 11 in the third direction Z is smaller than the thickness T12 of the second resin layer 12 in the third direction Z. For example, the thickness T11 is preferably 1/3 or more of the thickness T12, and more preferably 2/3 or more.

The first resin layer 11 is linear as described later with reference to FIG. 3, and the second resin layer 12 is in the form of a plate covering the entire first resin base 10. The first surface 10A of the first resin base 10 corresponds to the upper surface of the second resin layer 12. The second surface 10 B of the first resin base 10 is constituted by the lower surfaces of the first resin layer 11 and the second resin layer 12. The first resin layer 11 may have a shape extending from the first surface 10A to the second surface 10B. In this case, the first surface 10A is formed by the upper surfaces of the first resin layer 11 and the second resin layer 12.

In the illustrated example, the first resin layer 11 includes a frame portion 11a disposed in the peripheral area SA and an extended portion 11y disposed in the display area DA (see FIG. 3 for a planar shape). The upper surface and the side surface on the display area DA side of the frame portion 11 a are covered with the second resin layer 12. The extended portion 11 y is covered with the second resin layer 12 except for the lower surface.

The second resin base 20 includes a third resin layer 21 and a fourth resin layer 22. The material and shape of the third resin layer 21 and the fourth resin layer 22 are the same as those of the first resin layer 11 and the second resin layer 12. That is, the third resin layer 21 and the fourth resin layer 22 are formed of, for example, different types of polyimide, and the Young's modulus of the third resin layer 21 is larger than the Young's modulus of the fourth resin layer 22. The thickness T21 of the third resin layer 21 is smaller than the thickness T22 of the fourth resin layer 22. For example, the thickness T21 is preferably 1/3 or more of the thickness T22, and more preferably 2/3 or more. The first surface 20A of the second resin base 20 corresponds to the lower surface of the fourth resin layer 22. The second surface 20 B of the second resin base 20 is constituted by the upper surfaces of the third resin layer 21 and the fourth resin layer 22.

In the illustrated example, the third resin layer 21 includes a frame portion 21a disposed in the peripheral area SA and an extended portion 21y disposed in the display area DA (see FIG. 3 for a plan view). The lower surface and the side surface on the display area DA side of the frame portion 21 a are covered with the fourth resin layer 22. The extended portion 21 y is covered with the fourth resin layer 22 except for the upper surface.

The first resin layer 11 and the third resin layer 21 face each other. However, the first resin layer 11 and the third resin layer 21 may not be opposed at least in part.

FIG. 3 is a schematic plan view of the display panel PNL1 showing the shapes of the first resin layer 11 and the third resin layer 21. As shown in FIG. The first resin layer 11 has a frame portion 11 a, an extension portion 11 x extending in the first direction X, and an extension portion 11 y extending in the second direction Y. The third resin layer 21 has a frame portion 21 a, an extension portion 21 x extending in the first direction X, and an extension portion 21 y extending in the second direction Y. Note that the number of the

extended portions

11x, 11y, 21x, 21y illustrated is an example, and may be more or less. The

frame portions

11a and 21a are an example of a first frame portion.

The frame portion 11a is provided in a frame shape along the edge (each side E11 to E14) of the first resin base body 10. Similarly, the frame portion 21a is provided in a frame shape along the edge (each side E21 to E24) of the second resin base 20. Regions along the sides E21 to E23 of the frame portion 21a overlap the frame portion 11a in plan view. Therefore, in FIG. 3, a part of the frame portion 11a is hidden by the frame portion 21a.

Each extending portion 11x is connected to the frame portion 11a at both ends. Similarly, each extension portion 21x is connected to the frame portion 21a at both ends. The extending portion 21x crossing the display area DA overlaps the extending portion 11x in a plan view. In addition, the extended portion 11x is disposed below the frame portion 21a along the fourth side E24. Therefore, in FIG. 3, the extending portion 11x is hidden by the extending portion 21x or the frame portion 21a.

Each extension portion 11y is connected to the frame portion 11a at both ends. Similarly, both ends of each extension portion 21y are connected to the frame portion 21a. The extending portion 21 y overlaps with the extending portion 11 y in plan view. Therefore, in FIG. 3, a part of the extension 11y is hidden by the extension 21y. The extended portion 11y may not be disposed in the terminal area TA.

The frame portion 11a and the

extension portions

11x and 11y have, for example, a lattice shape in which the pitch in the first direction X and the second direction Y is constant as a whole. However, at least one of the pitches in the first direction X and the second direction Y may not be constant. Similarly, the frame portion 21a and the

extension portions

21x and 21y are also in the form of a lattice having a constant pitch in the first direction X and the second direction Y as a whole, for example. .

FIG. 4 is a plan view schematically showing the vicinity of the intersection of the

extension portions

11x and 11y. Here, the scanning line G, the signal line S, the light shielding layer 24, and the extending

portions

11x and 11y are shown, and illustration of other elements is omitted.

The extended portion 11x overlaps the scanning line G. The extended portion 11 y overlaps the signal line S. Furthermore, the scanning line G, the signal line S, and the

extended portions

11x and 11y all overlap the light shielding layer 24. The

extension portions

11x and 11y are connected to each other at a position where the scanning line G and the signal line S intersect. The relationship between the

extended portions

21 x and 21 y, the scanning line G, the signal line S, and the light shielding layer 24 is also the same as in the illustrated example. The

frame portions

11a and 21a overlap the light shielding layer 24 disposed in the peripheral area SA (see FIG. 2).

Subsequently, an example of a manufacturing process of the display panel PNL1 will be described. First, a plurality of first substrates SUB1 are formed on a mother glass. Similarly, a plurality of second substrates SUB2 are formed on another mother glass.

FIG. 5 is a schematic plan view of a mother glass MG on which a plurality of first substrates SUB1 are formed. The mother glass MG is cut along a cut line CL in the shape of the first substrate SUB1 in a later manufacturing process.

The first resin base 10 is formed on substantially the entire mother glass MG. The first resin layer 11 is formed in a lattice shape over the entire first resin base 10. The cut line CL overlaps the first resin layer 11.

The first resin layer 11 can be formed of, for example, photosensitive polyimide. In this case, the material that is the source of the first resin layer 11 is applied to substantially the entire mother glass MG, and this is exposed and developed to be patterned into the shape of the first resin layer 11. The first resin layer 11 can also be formed of non-photosensitive polyimide. In this case, first, the material that is the source of the first resin layer 11 is applied to substantially the entire mother glass MG, and this is cured by heating to form a polyimide layer. Next, a photosensitive resist is formed on the polyimide layer, exposed and developed to open it in the shape of the first resin layer 11. Thereafter, the polyimide layer is patterned in the shape of the first resin layer 11 by etching through the openings of the resist.

After the first resin layer 11 is formed in this manner, a material that is the source of the second resin layer 12 is applied from above the first resin layer 11 and the second resin layer 12 is cured by curing the same by heating. Form. Thereby, the first resin base 10 as shown in FIG. 2 can be obtained.
The second substrate SUB2 can also be formed by the same method as the above-described first substrate SUB1.

The two mother glasses MG on which the substrates SUB1 and SUB2 are respectively formed are bonded to each other via the above-described seal material SL. For example, the liquid crystal layer LC can be formed by dropping a liquid crystal material inside the sealing material SL and bonding two mother glasses MG in a vacuum atmosphere. Thereafter, by cutting the two mother glasses MG along the cut line CL, the individual display panels PNL1 are cut out.

FIG. 6, FIG. 7, FIG. 8 and FIG. 9 are schematic cross sectional views sequentially showing the subsequent manufacturing steps of the display panel PNL1 cut out from the mother glass MG. In each of the drawings, only the first resin base 10, the second resin base 20, the sealing material SL and the liquid crystal layer LC are shown as elements of the display panel PNL1, and the other elements are omitted.

In FIG. 6, the glass substrate GS1 cut out from the mother glass MG is attached to the second surface 10B of the first resin base 10. Further, the glass substrate GS2 cut out from the mother glass MG is attached to the second surface 20B of the second resin base 20. In this state, the glass substrate GS2 is removed by laser lift off (LLO). Specifically, laser light from the laser light source LS is irradiated from the side of the glass substrate GS2, and the interface between the glass substrate GS2 and the second resin base 20 is peeled off. As this laser beam, for example, an excimer laser or YAG laser in the ultraviolet region can be used.

After removing the glass substrate GS2, as shown in FIG. 7, a part of the second substrate SUB2 is cut. Thus, the terminal area TA is formed on the first substrate SUB1.

After the terminal area TA is formed, as shown in FIG. 8, the second polarizing plate PL2 is attached to the second surface 20B of the second resin base 20. Furthermore, similarly to the glass substrate GS2, the glass substrate GS1 is removed by LLO using the laser light source LS.

After removing the glass substrate GS1, as shown in FIG. 9, the first polarizing plate PL1 is attached to the second surface 10B of the first resin base 10. Thus, the display panel PNL1 is completed.

When the first resin substrate 10 is a uniform polyimide film, when the first resin substrate 10 and the glass substrate GS1 are peeled off, the first resin substrate 10 is not supported by the glass substrate GS1, so the first resin substrate 10 is May stretch. Similarly, when the second resin base 20 is a uniform polyimide film, when the second resin base 20 and the glass substrate GS2 are peeled off, the second resin base 20 may expand and contract.

When these expansions and contractions occur, distortion occurs in the display area DA, which may adversely affect the display quality. Moreover, a pitch shift may occur in the terminals T, which may cause a failure in connection with the flexible circuit board FPC. Furthermore, if the first resin base 10 and the second resin base 20 have different expansion and contraction modes, the scanning line G, the signal line S and the pixel electrode PE of the first substrate SUB1, the light shielding layer 24 of the second substrate SUB2 and the color filter There is a possibility that 25 may be shifted. When such a shift occurs, color mixing may occur between adjacent sub-pixels SP.

On the other hand, in the present embodiment, the first resin base 10 is provided with the linear first resin layer 11. Since the Young's modulus of the first resin layer 11 is larger than the Young's modulus of the second resin layer 12, the first resin layer 11 is less likely to expand and contract when the glass substrate GS1 is peeled off, as compared to the second resin layer 12. Therefore, expansion and contraction of the first resin base 10 can be suppressed.

When the first resin layer 11 is formed in a lattice as shown in FIG. 3, the influence of the expansion and contraction of the second resin layer 12 remains in the lattice. Therefore, the overall deformation of the first resin base 10 is reduced.

By arranging the frame portion 11a along the edge of the first substrate SUB1 as shown in FIG. 3, the outer shape of the first substrate SUB1 can be stabilized. Furthermore, by disposing the

extension portions

11x and 11y in the display area DA, it is possible to suppress the displacement of the sub-pixel SP in the display area DA.

Since the first resin layer 11 has a Young's modulus greater than that of the second resin layer 12, the transmittance may be inferior to that of the second resin layer 12. However, since the

extension portions

11x and 11y overlap with the scanning line G, the signal line S, and the light shielding layer 24, respectively, the transmittance of the display area DA is hardly affected.

If the thickness T11 of the first resin layer 11 is set to 1/3 or more of the thickness T12 of the second resin layer 12 as described above, a favorable effect of suppressing the expansion and contraction of the first resin substrate 10 can be obtained. . If the thickness T11 is 2/3 or more of the thickness T12, the effect can be further enhanced.

The effects described above for the first resin base 10 can be obtained similarly for the second resin base 20 as well. By suppressing the expansion and contraction in both the first resin base 10 and the second resin base 20, the deviation between each element of the first substrate SUB1 and each element of the second substrate SUB2 is suppressed, and color mixing of adjacent subpixels SP Can be prevented.

6 to 9 illustrate the manufacturing method of removing the glass substrates GS1 and GS2 which were a part of the mother glass MG after the display panel PNL1 is cut out from the two mother glasses MG bonded to each other. As another example, before cutting out the display panel PNL1, the first resin base 10 and the second resin base 20 may be peeled off from the mother glass MG by the above-described LLO.

In this manufacturing method, if the first resin substrate 10 is a uniform polyimide film, the first resin substrate 10 may expand and contract when the mother glass MG is removed, and the cut line CL may deviate from the original position. There is. On the other hand, in the configuration of the present embodiment, since the first resin layer 11 suppresses the expansion and contraction of the first resin base 10, the shift of the cut line CL can be suppressed. The same applies to the second resin base 20.

In the present embodiment, the first resin substrate 10 has a two-layer structure of the first resin layer 11 and the second resin layer 12, and the second resin substrate 20 has the third resin layer 21 and the fourth resin layer 22. An example has been disclosed that is a two-layer structure. However, the first resin base 10 may have a two-layer structure, and the second resin base 20 may be a uniform base. In addition, the first resin base 10 may be a uniform base, and the second resin base 20 may have a two-layer structure.

The planar shapes of the first resin layer 11 and the third resin layer 21 are not limited to those shown in FIG. In the following second to seventh embodiments, other shapes applicable to the first resin layer 11 and the third resin layer 21 are shown. The planar shapes of the first resin layer 11 and the third resin layer 21 disclosed in each embodiment can be combined as appropriate.

Second Embodiment
FIG. 10 is a schematic plan view of a display panel PNL1 showing the shapes of the first resin layer 11 and the third resin layer 21 according to the second embodiment. As in the example of FIG. 3, the first resin layer 11 has a frame portion 11a, and the third resin layer 21 has a frame portion 21a.

The first resin layer 11 has, in the terminal area TA, a plurality of extending portions 11 x which extend in the first direction X and are arranged at regular intervals in the second direction Y. Each extending portion 11x is connected to the frame portion 11a at both ends.

As in the present embodiment, in the configuration in which the first resin layer 11 extends in the first direction X in the terminal area TA, that is, in the direction intersecting the direction from the display area DA to the terminal T, the fourth side E11 is The terminal area TA can be easily bent so as to be located on the back side of the display panel PNL1.

Third Embodiment
FIG. 11 is a schematic plan view of a display panel PNL1 showing the shapes of the first resin layer 11 and the third resin layer 21 according to the third embodiment. As in the example of FIG. 10, the first resin layer 11 has a frame portion 11a and an extended portion 11x in the terminal area TA, and the third resin layer 21 has a frame portion 21a.

Furthermore, the first resin layer 11 has a frame portion 11b along the edge of the display area DA. In addition, the third resin layer 21 has a frame portion 21b along the edge of the display area DA. The frame portion 11 b and the frame portion 21 b overlap in a plan view. Therefore, in FIG. 11, the frame portion 11b is hidden by the frame portion 21b. The

frame portions

11 b and 21 b are an example of a second frame portion.

If the

frame portions

11 b and 21 b are provided as in the present embodiment, the expansion and contraction of the first resin base 10 and the second resin base 20 in the peripheral area SA hardly affect the display area DA.

Fourth Embodiment
FIG. 12 is a schematic plan view of a display panel PNL1 showing the shapes of the first resin layer 11 and the third resin layer 21 according to the fourth embodiment. As in the example of FIG. 11, the first resin layer 11 has

frame portions

11a and 11b and an extension portion 11x in the terminal area TA, and the third resin layer 21 has

frame portions

21a and 21b.

The first resin layer 11 has, in the display area DA, an extension portion 11 x extending in the first direction X and an extension portion 11 y extending in the second direction Y. The third resin layer 21 has an extended portion 21 x extending in the first direction X and an extended portion 21 y extending in the second direction Y in the display area DA.

In the display area DA, both ends of the

extension portions

11x and 11y are connected to the frame portion 11b. Both ends of the

extension portions

21x and 21y are connected to the frame portion 21b. The extending portion 21x overlaps with the extending portion 11x in a plan view. The extending portion 21 y overlaps with the extending portion 11 y in plan view. Therefore, in FIG. 12, the

extended portions

11x and 11y are hidden by the

extended portions

21x and 21y.

If the display area DA is divided into a plurality of areas by the

extended portions

11x, 11y, 21x, 21y as in the present embodiment, the influence of the expansion and contraction of the second resin layer 12 and the fourth resin layer 22 is within each area. Stay. Therefore, before and after peeling of the glass substrate, the overall deformation amount of the first resin base 10 and the second resin base 20 in the display area DA is reduced.

Fifth Embodiment
FIG. 13 is a schematic plan view of a display panel PNL1 showing the shapes of the first resin layer 11 and the third resin layer 21 according to the fifth embodiment. As in the example of FIG. 12, the first resin layer 11 has

frame portions

11a and 11b and

extension portions

11x and 11y, and the third resin layer 21 has

frame portions

21a and 21b and

extension portions

21x and 21y. ing.

Furthermore, the first resin layer 11 has extended

portions

11p and 11q extending in a direction intersecting the first direction X and the second direction Y in the display area DA. In addition, the third resin layer 21 has extended

portions

21p and 21q extending in a direction intersecting the first direction X and the second direction Y in the display area DA.

For example, as illustrated, the

extension parts

11p and 11q extend in the diagonal direction of the area divided by the

extension parts

11x and 11y and the frame part 11b. The same applies to the

extended portions

21p and 21q. The

extended portions

21p and 21q overlap with the

extended portions

11p and 11q in plan view, respectively. Therefore, in FIG. 13, the

extension portions

11 p and 11 q are hidden by the

extension portions

21 p and 21 q.

By providing the extending

portions

11p, 11q, 21p, 21q as in the present embodiment, expansion and contraction of the first resin base 10 and the second resin base 20 in multiple directions can be effectively suppressed.

Sixth Embodiment
FIG. 14 is a schematic plan view of a display panel PNL1 showing the shapes of the first resin layer 11 and the third resin layer 21 according to the sixth embodiment. As in the example of FIG. 12, the first resin layer 11 has

frame portions

11a and 11b and

extension portions

11x and 11y, and the third resin layer 21 has

frame portions

21a and 21b and

extension portions

21x and 21y. ing.

In the example of FIG. 14, in the display area DA, the

extension portions

11 x and 21 x are respectively disposed between the sub-pixels SP in the second direction Y, and the

extension portions

11 y and 21 y are in the first direction X. Are respectively disposed between. Thereby, the sub-pixels SP are partitioned in a grid shape by the

extension portions

11x, 11y, 21x, 21y. As shown in FIG. 4, the

extended portions

11x and 21x overlap the scanning line G and the light shielding layer 24, and the

extended portions

11y and 21y overlap the signal line S and the light shielding layer 24.

If the extending

portions

11x, 11y, 21x, 21y are provided at high density as in the present embodiment, expansion and contraction of the first resin base 10 and the second resin base 20 can be extremely well suppressed.

The

extension portions

11x, 11y, 21x, and 21y may divide an area for each pixel PX configured by a plurality of sub-pixels SP, for example. In addition, the size of the area divided by the

extended portions

11x, 11y, 21x, 21y can be appropriately determined.

Seventh Embodiment
FIG. 15 is a schematic plan view of a display panel PNL1 showing the shapes of the first resin layer 11 and the third resin layer 21 according to the seventh embodiment. The first resin layer 11 and the third resin layer 21 are lattice-like as in the example of FIG. 3, but gaps are provided in portions corresponding to the intersections of the lattices.

Specifically, the frame portion 11a is disposed intermittently along the sides E11 to E14, and the frame portion 21a is disposed intermittently along the sides E21 to E24. The

extension portions

11x and 21x are intermittently disposed along the first direction X, and the

extension portions

11y and 21y are disposed intermittently along the second direction Y.

From another point of view, the extension 11x and the extension 11y are separated from each other at a position corresponding to the intersection of the grids. Similarly, the frame portion 11a and the extension portion 11x, the frame portion 11a and the extension portion 11y, the extension portion 21x and the extension portion 21y, the frame portion 21a and the extension portion 21x, and the frame portion 21a and the extension portion 21y They are spaced apart from one another at positions corresponding to the intersections of the grids.

As shown in FIG. 3, when the first resin layer 11 and the third resin layer 21 are formed in a lattice, before the curing of the second resin layer 12 and the fourth resin layer 22 when the display panel PNL 1 is manufactured. When the material is applied, the material may not spread uniformly. Further, since the first resin layer 11 and the third resin layer 21 are continuous over the entire length of the first resin base 10 and the second resin base 20, the amount of expansion and contraction of the resin layers 11 and 21 is also increased.

On the other hand, in the case of the configuration of the present embodiment, the material before curing which is the source of the second resin layer 12 and the fourth resin layer 22 is the intersection point of the lattice of the first resin layer 11 and the third resin layer 21 It spreads uniformly through the gap of the position equivalent to. In addition, since the first resin layer 11 and the third resin layer 21 are subdivided, the expansion and contraction of the resin layers 11 and 21 can be also within a local range, and as a result, the overall amount of expansion and contraction is reduced. it can.

In the present embodiment, the first resin layer 11 is separated at a position corresponding to each intersection of the first resin layer 11 having a planar shape shown in FIG. 3, and the third resin layer 21 having a planar shape shown in FIG. The example which spaces apart the 3rd resin layer 21 in the position corresponded to each intersection was shown. The configuration in which the first resin layer 11 and the third resin layer 21 are separated at the positions corresponding to the respective intersections can also be applied to the first resin layer 11 and the third resin layer 21 having a planar shape shown in FIGS. it can.

Eighth Embodiment
In the eighth embodiment, another structure applicable to the first resin base 10 and the second resin base 20 is disclosed. FIG. 16 is a schematic cross-sectional view of a display panel PNL1 according to the present embodiment. Here, as in FIG. 6, the state before peeling of the glass substrates GS1 and GS2 is shown.

The first resin base 10 includes two

resin layers

12 a and 12 b instead of the second resin layer 12. The resin layers 12 a and 12 b are formed of polyimide having a Young's modulus smaller than that of the first resin layer 11. The resin layer 12a is formed on the glass substrate GS1. The first resin layer 11 is formed on the resin layer 12a. The resin layer 12 b covers the first resin layer 11 and the resin layer 12 a.

Similarly, the second resin base 20 includes two resin layers 22 a and 22 b instead of the fourth resin layer 22. The resin layers 22 a and 22 b are formed of polyimide having a Young's modulus smaller than that of the third resin layer 21. The resin layer 22a is formed under the glass substrate GS2. The third resin layer 21 is formed under the resin layer 22a. The resin layer 22 b covers the third resin layer 21 and the resin layer 22 a.

In the case of polyimide, the absorptivity of laser light tends to be smaller as the Young's modulus is larger. Therefore, when the first resin layer 11 is in contact with the glass substrate GS1 as in the first embodiment, there is a possibility that the first resin base 10 and the glass substrate GS1 can not be peeled off smoothly in the LLO. On the other hand, in the case of the structure of the present embodiment, the resin layer 12a having a Young's modulus smaller than that of the first resin layer 11 is in contact with the glass substrate GS1. And it becomes easy to peel off. The same applies to the second resin base 20.

[Ninth embodiment]
In each of the embodiments described above, the liquid crystal display device DSP1 is disclosed. In a ninth embodiment, an organic EL display device is disclosed.

FIG. 17 is a plan view showing a configuration example of an organic EL display device DSP2 (hereinafter, referred to as a display device DSP2) according to the present embodiment. Elements similar to those of the first embodiment are assigned the same reference numerals and explanation thereof is omitted.

The display device DSP2 includes a display panel PNL2. The display panel PNL2 has a rectangular shape having a first side E1, a second side E2, a third side E3, and a fourth side E4. Each side E1, E2 is parallel to the second direction Y. Each side E3, E4 is parallel to the first direction X. The display panel PNL2 is not limited to the rectangular shape.

The pixels PX arranged in the display area DA can be configured by red, green and blue sub-pixels SP. The pixels PX may include sub-pixels SP of other colors, such as white sub-pixels SP.

FIG. 18 is a diagram showing an example of the circuit configuration of the sub-pixel SP. The sub-pixel SP includes an organic EL element OLED, a first switching element SW1, and a second switching element SW2.

The pixel electrode PE (anode electrode) of the organic EL element OLED is connected to the power supply line PS via the first switching element SW1. A storage capacitor C is formed between the gate electrode and the source electrode (or drain electrode) of the first switching element SW1. The gate of the first switching element SW1 is connected to the signal line S via the second switching element SW2. The gate of the second switching element SW2 is connected to the scanning line G.

When a video signal is supplied to the pixel electrode PE via the first switching element SW1, a predetermined potential difference is generated between the pixel electrode PE and the common electrode CE (cathode electrode). Due to this potential difference, the organic light emitting layer ORG emits light in a color corresponding to each sub-pixel SP. The light emitted from the organic light emitting layers ORG of the sub-pixels SP of each color may be the same color (for example, white), and a color filter may be disposed in each sub-pixel SP.

FIG. 19 is a diagram showing an example of a cross section of the display panel PNL2. Here, a part of the display area DA corresponding to one sub-pixel SP is shown. The display panel PNL2 includes a flexible resin base 30, a barrier layer 33, a first insulating layer 34, a second insulating layer 35, a first passivation layer 36, and a second passivation layer 37. A layer 38 and a third passivation layer 39 are provided. Further, the display panel PNL includes the organic light emitting layer ORG and the pixel electrode PE disposed in each sub-pixel SP, the bank 40 disposed at the boundary of the sub-pixel SP, and the common electrode CE.

The resin base 30 has a first surface 30A and a second surface 30B parallel to each other. The barrier layer 33 covers the first surface 30A. The first insulating layer 34 covers the barrier layer 33. The signal line S is disposed on the first insulating layer 34. The second insulating layer 35 covers the signal line S and the first insulating layer 34. The first passivation layer 36 covers the second insulating layer 35.

The pixel electrode PE is disposed on the first passivation layer 36. The organic light emitting layer ORG is disposed on the pixel electrode PE. The bank 40 is disposed between the pixel electrode PE of the adjacent subpixel SP and the organic light emitting layer ORG. The common electrode CE covers the organic light emitting layer ORG and the bank 40. The second passivation layer 37 covers the common electrode CE. The sealing layer 38 covers the second passivation layer 37. The third passivation layer 39 covers the sealing layer 38. A polarizing plate PL is adhered on the third passivation layer 39.

The resin base 30 includes a first resin layer 31 and a second resin layer 32. The first resin layer 31 is formed of, for example, polyimide. The second resin layer 32 is formed of, for example, a different type of polyimide from the first resin layer 31. The Young's modulus of the first resin layer 31 is larger than the Young's modulus of the second resin layer 32.

The thickness T31 of the first resin layer 31 in the third direction Z is smaller than the thickness T32 of the second resin layer 32 in the third direction Z. For example, the thickness T31 is preferably 1/3 or more of the thickness T32, and more preferably 2/3 or more.

The first resin layer 31 is linear as described later with reference to FIG. 20, and the second resin layer 32 is in the form of a plate covering the entire resin base 30. The illustrated first resin layer 31 is covered with the second resin layer 32 except for the lower surface. The first surface 30A of the resin base 30 corresponds to the upper surface of the second resin layer 32. The second surface 30 B of the resin base 30 is constituted by the lower surfaces of the first resin layer 31 and the second resin layer 32. A member such as a support film may be attached to the second surface 30B.

Since the substrate of the display panel PNL2 is formed of a resin material, the display panel PNL2 can be bent into any shape.

FIG. 20 is a schematic plan view of the display panel PNL2 showing the shape of the first resin layer 31. As shown in FIG. Here, the example which applied the planar shape similar to the 1st resin layer 11 shown in FIG. 14 to the 1st resin layer 31 is shown. Besides, as the planar shape of the first resin layer 31, for example, the planar shape of the first resin layer 11 disclosed in FIG. 3, FIG. 10 to FIG. 13, and FIG.

In the example of FIG. 20, the first resin layer 31 has frame portions 31a and 31b. The frame portion 31 a is provided in a frame shape along the edge (each side E 1 to E 4) of the resin base 30. The frame portion 31 b is provided in a frame shape along the edge of the display area DA.

Furthermore, the first resin layer 31 has a plurality of extending portions 31 x extending in the first direction X and a plurality of extending portions 31 y extending in the second direction Y. A part of the plurality of extended portions 31x is arranged at a constant interval in the second direction Y in the terminal area TA between the display area DA and the fourth side E4. Both ends of each of the extension portions 31x are connected to the frame portion 31a.

In the display area DA, the plurality of extended portions 31x and the plurality of extended portions 31y are arranged in a lattice. Both ends of each of the

extension portions

31x and 31y are connected to the frame portion 31b. The extended portions 31x are respectively disposed between the sub-pixels SP arranged in the second direction Y. The extension portions 31y are respectively disposed between the sub-pixels SP in the first direction X. Thereby, the sub-pixels SP are partitioned in a grid shape by the

extension portions

31x and 31y. The extended portion 31x overlaps, for example, the scanning line G. The extended portion 31 y overlaps, for example, the signal line S.

Even if it is organic EL display DSP2 like this embodiment, the same effect as each above-mentioned embodiment can be acquired. Further, in the self-luminous display device DSP2, even if the first resin layer 31 is arranged in a mode not to intersect the scanning line G or the signal line S as in the

extended portions

11p and 11q of FIG. There is no impact on

The resin base 30 may have a structure in which the first resin layer 31 is sandwiched between two resin layers, similarly to the first resin base 10 shown in FIG.

All display devices that can be appropriately designed and changed by those skilled in the art based on the display devices described as the embodiments of the present invention also fall within the scope of the present invention as long as they include the subject matter of the present invention.
Within the scope of the concept of the present invention, those skilled in the art can conceive of various modifications, which are considered to be within the scope of the present invention. For example, those in which a person skilled in the art appropriately adds, deletes, or changes the design of the components or adds, omits, or changes the steps of the above-described embodiments may be included in the present invention. As long as it comprises the gist, it is included in the scope of the present invention.
In addition, with regard to the other effects brought about by the aspects described in each embodiment, what is obvious from the description of the present specification or that which can be appropriately conceived by those skilled in the art is naturally solved as the present invention. Be done.

DSP1: display device, PNL1: display panel, SUB1: first substrate, SUB2: second substrate, LC: liquid crystal layer, DA: display region, SA: peripheral region, PX: pixel, SP: subpixel, G: scanning line S: signal line, GS1, GS2: glass substrate, 10: first resin base, 11: first resin layer, 12: second resin layer, 20: second resin base, 21: third resin layer, 22: Fourth resin layer, 24 ... light shielding layer.

Claims

A flexible first resin substrate,
A plurality of pixels disposed above the first resin base,
A plurality of scan lines extending to a display area including the plurality of pixels;
A plurality of signal lines extending to the display area and intersecting the plurality of signal lines;
A display device, wherein the first resin base includes a linear first resin layer and a plate-like second resin layer covering at least a side surface of the first resin layer.
The Young's modulus of the first resin layer is larger than the Young's modulus of the second resin layer,
The display device according to claim 1.
The first resin layer includes a portion along an edge of the first resin substrate and a portion along an edge of the display area.
The display device according to claim 1.
The first resin layer includes a frame-shaped first frame portion along an edge of the first resin base,
The display device according to claim 1.
The first resin layer includes a frame-shaped second frame portion along an edge of the display area,
The display device according to claim 1.
A terminal for external connection disposed in a peripheral area outside the display area;
The first resin layer includes a portion extending between the display area and the terminal in a direction intersecting the direction from the display area to the terminal.
The display device according to claim 1.
The first resin layer includes a portion overlapping with the scanning line or the signal line.
The display device according to claim 1.
The first resin layer includes a first extending portion extending in a first direction, and a second extending portion extending in a second direction intersecting the first direction,
The first extending portion and the second extending portion are arranged in a grid shape.
The display device according to claim 1.
The first extension and the second extension are spaced apart from each other at a position corresponding to the intersection point of the grid.
The display device according to claim 8.
The first extension portion overlaps the scan line.
The display device according to claim 8.
The second extension portion overlaps the signal line.
The display device according to claim 8.
And a light shielding layer overlapping the scanning line and the signal line,
The first extending portion or the second extending portion overlaps the light shielding layer.
The display device according to claim 8.
The first resin layer further includes a third extending portion extending in a direction intersecting the first direction and the second direction.
The display device according to claim 8.
The third extension portion extends in a diagonal direction of a grid including the first extension portion and the second extension portion.
The display device according to claim 13.
The thickness of the first resin layer is 1/3 or more of the thickness of the second resin layer,
The display device according to claim 1.
The thickness of the first resin layer is 2/3 or more of the thickness of the second resin layer,
The display device according to claim 1.
The thickness of the first resin layer is smaller than the thickness of the second resin layer,
The display device according to claim 1.
A second resin base facing the first resin base;
And a liquid crystal layer disposed between the first resin base and the second resin base,
The second resin base includes a linear third resin layer, and a plate-like fourth resin layer covering at least a side surface of the third resin layer,
The Young's modulus of the third resin layer is larger than the Young's modulus of the fourth resin layer,
The display device according to claim 1.
A pixel electrode disposed in each of the plurality of pixels;
A common electrode facing the pixel electrode;
A light emitting layer disposed in each of the plurality of pixels and emitting light according to a potential difference between the pixel electrode and the common electrode;
The display device according to claim 1.
The second resin layer includes a pair of resin layers,
The first resin layer is disposed between the pair of resin layers.
The display device according to claim 1.