JP2002189431A - Method of manufacturing laminated display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of aligning and laminating a plurality of display elements without the occurrence of warpage in a display device, such as a liquid crystal display device. SOLUTION: The second display element 6B is thrust by a press roller 34 from its one end toward the other end across a tacky adhesive sheet 30 on one surface of the first display element 6A arranged on a flat plate 32, by which the first and second display elements 6A and 6B are aligned. Next, the aligned first and second display elements 6A and 6B are arranged on the flat plate 32 in such a manner that the one surface of the first display element 6A comes to a lower side. In succession, the third display element 6C is thrust by a pres roller 34 from its one end toward the other end through a tacky adhesive sheet 31 on the other surface of the first display element 6A, by which the third display element 6C is laminated to the aligned first and second display elements 6A and 6B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a multilayer display device (for example, a liquid crystal display device) in which a plurality of display elements each having a display layer sandwiched between a pair of flexible substrates are stacked.

[0002]

2. Description of the Related Art In recent years, a liquid crystal display device using a light and thin film substrate made of resin or the like has been made possible, and thus a multi-layer liquid crystal display device in which a plurality of such liquid crystal display devices are stacked has attracted attention. .

FIG. 8 is a partial cross-sectional view schematically showing one example of such a liquid crystal display device. As shown in the drawing, the display device 2 includes three display elements 6 (a blue display element 6B, a green display element 6G, and a red display element 6R in this order from the observation side).

Each of the display elements 6 (6B, 6G, 6R) has a film-shaped first substrate 9 (9B, 9B) made of a transparent material.
G, 9R) and the second substrate 10 (10B, 10G, 10
R), a resin structure 12 for bonding and supporting the first substrate 9 and the second substrate 10, and a liquid crystal 14 filled in a gap formed by the resin structure 12. The liquid crystal 14 is, for example, a chiral nematic liquid crystal that can selectively reflect light having a wavelength in the visible region. In the following description, a portion sandwiched between the first substrate 9 and the second substrate 10 is called a display layer. Although not shown, a spherical spacer is also included between the first and second substrates 9 and 10. If necessary, the second substrate 10 of the red display element 6R
A light absorbing layer 15 is provided on the back surface of R. Also, the first substrate 9
A plurality of transparent strip-shaped upper electrodes 16 (16B, 1B)
6G, 16R) are arranged in parallel at predetermined intervals. On the other hand, on the upper surface of the second substrate 10, a plurality of lower transparent electrodes 18 (18B, 18G, 18R) are arranged in parallel at predetermined intervals. These upper electrodes 16
The arrangement direction of the lower electrode 18 and the lower electrode 18 are orthogonal to each other when viewed from a direction perpendicular to the substrate, and the point at which the upper electrode 16 and the lower electrode 18 face each other (the intersection point when viewed from the direction perpendicular to the substrate) is The pixels of the display device 2 are formed. A set of these pixels is arranged in a matrix, and display is performed by the set of pixels. Specifically, predetermined upper and lower electrodes 16,
By applying a predetermined voltage to the display 18, the state of the liquid crystal portion located at the intersection of the upper electrode 16 and the lower electrode 18 (when viewed from a direction perpendicular to the substrate) is changed to perform display.

A multilayer liquid crystal display device is manufactured, for example, by laminating a plurality of display elements 6B, 6G, and 6R with good alignment via an adhesive sheet and bonding them together. It is important to stick together.

Until now, there has been almost no proposal on a method of laminating such display elements.

Accordingly, the present invention comprises a plurality of laminated display elements including a plurality of flexible display elements and a flexible display element and a flexible panel member other than the display elements. It is an object of the present invention to provide a new and useful method for manufacturing a display device.

Another object of the present invention is to provide a display device manufacturing method in which a plurality of display elements or a display element and another member are bonded and laminated without causing a warp in a display device such as a liquid crystal display device. And

It is another object of the present invention to provide a display device manufacturing method capable of manufacturing a display device in which a plurality of display elements are stacked and displacement of the display elements is suppressed.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, a first aspect of a manufacturing method according to the present invention comprises a display element having a display layer sandwiched between a pair of flexible substrates; In a method for manufacturing a display device in which a first panel having a structure and a second panel having flexibility are laminated, the first panel is sequentially pressed by a pressing member on one surface of a display element via an adhesive layer. By pressing, the first step of bonding the first panel to the display element, and by pressing the second panel sequentially with the pressing member through the adhesive layer to the other surface of the display element, And a second step of bonding the second panel to the display element.

An adhesive sheet is preferably used as an adhesive layer.

The first step is performed with the display element supported on a flat surface, and then the second step is performed with the bonded display element and the first panel supported on a flat surface. be able to. At this time, the bonding can be performed by relatively moving the pressing member along the flat surface.

In one embodiment, the first panel and / or the second panel is another display element having a display layer sandwiched between a pair of flexible substrates. In another embodiment, the first panel and / or the second panel is a support member or a protective film that maintains the shape of the display element.

In a second aspect of the manufacturing method according to the present invention, a display element having a display layer sandwiched between a pair of flexible substrates and a first flexible panel are laminated. In a method for manufacturing a display device, a first step of disposing a display element on a concave surface and sequentially pressing a first panel by a pressing member via an adhesive layer on one surface of the display element disposed on the concave surface A second step of bonding the first panel to the display element.

After the second step, the bonded display element and the first panel are arranged on the concave surface, and the flexible second panel is successively placed thereon by a pressing member via an adhesive layer. The display device having three layers may be manufactured by pressing the second panel to the bonded display element and the first panel by pressing.

In a third aspect of the manufacturing method according to the present invention, a display element having a display layer sandwiched between a pair of flexible substrates and a first flexible panel are laminated. In the method for manufacturing a display device, a step of bonding the display element and the first panel by passing the display element and the first panel between a pair of rollers with the adhesive layer interposed therebetween is included. It is characterized by including.

After the second step, the bonded display element and the first panel and the flexible second panel are passed between a pair of rollers with the adhesive layer interposed therebetween. Then, the display device having three layers may be manufactured by attaching the second panel to the attached display element and the first panel.

In a fourth aspect of the manufacturing method according to the present invention, a display element having a display layer sandwiched between a pair of flexible substrates; a first flexible panel; In a method for manufacturing a display device in which a second panel having a property is laminated, a display element, a first panel, and a second panel are provided between the display element and the first panel, and between the display element and the second panel. By passing between a pair of rollers with an adhesive layer sandwiched between the panel and the panel, the three members are simultaneously bonded.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

(First Embodiment) FIGS. 1 and 2 are process diagrams showing a first embodiment of a display device manufacturing method according to the present invention. A pair of film substrates 22 (22A, 22B, 22
C), 24 (24A, 24B, 24C) between the display layer 26
(26A, 26B, 26C) are sandwiched between at least three display elements 6A, 6B, 6C.
8, they are attached to each other via the adhesive sheets 30 and 31. As the pressure-sensitive adhesive sheet, for example, a sheet having release sheets (not shown) on both surfaces thereof before use can be used.

Since the pressure-sensitive adhesive sheet has no fluidity like a liquid adhesive and fixes the relative positions of the display elements when the display elements are overlapped with each other, the adhesive layer is formed as in the case of using a liquid adhesive. No curing step is required, and the display element does not deviate from its initial position after overlapping. It should be noted that a pressure-sensitive adhesive to which both display elements are adhered by an adhesive force generated by pressing can be used instead of the pressure-sensitive adhesive sheet.

Each of the display elements 6A, 6B, 6C is, for example,
The same configuration as that shown in FIG. 8, that is, a resin material (for example, polycarbonate or polyether sulfone)
The liquid crystal and the spacer may be sandwiched between one film substrate made of Note that a resin structure that adheres and supports both substrates may be arranged in the display area according to a predetermined rule. In this case, the gap between the substrates becomes more constant, and problems such as peeling of the substrate due to bending of the element can be suppressed. A seal wall may be provided so as to surround the display area.

The bonding device 28 has a flat plate 32 and a pressing roller 34 disposed above the flat plate 32 and having an axis parallel to the surface of the flat plate 32. The flat plate 32 is a table slidable in the direction of the arrow 35 in the figure. The shaft of the pressing roller 34 is fixed at a predetermined position. The height of the shaft of the pressing roller 34 with respect to the flat plate 32 is adjustable.

In order to suction-fix the first display element 6A by negative pressure, the flat plate 32 has a plurality of suction holes 36 on the surface facing the display element.
2, and further connected to a vacuum pump 40 via an electromagnetic valve 38.

One end of the upper display element (second display element 6B or third display element 6C) bonded to the lower display element (first display element 6A) fixed on the flat plate 32 is moved. It is intended to be lifted and held by a possible holding member 42. The holding member 42 also appropriately pulls one end of the upper display element so as not to sag. By bonding one end of the panel to be bonded (here, the display element) while lifting one end (that is, bending the panel), it is possible to prevent air bubbles from being trapped between the panel and the display element.

In the bonding operation of the display elements, first, the release sheets on one side are respectively peeled off from both sides of the first display element 6A, and the adhesive sheets 30, 31 are attached [FIG.
(A)]. Next, the first display element 6A is arranged at a predetermined position on the flat plate 32, and the electromagnetic valve 38 is opened to adsorb and fix the first display element 6A on the flat plate 32. Then, after the release sheet on the other surface of the adhesive sheet 30 is peeled off, the second display element 6 is removed by an appropriate positioning means.
B and the other end of the first display element 6A are positioned.

Examples of positioning include, but are not limited to, (1) a hole is provided at a position corresponding to a pixel in each panel (here, each display element) to be bonded;
(2) At least one end face of each panel (here, each display element) to be bonded is cut at a position corresponding to a pixel, and an end face is formed. (3) Each panel (here, each display element) is stacked using an appropriate holding tool (not shown) with the release sheet attached, and the holding tool is attached while observing the overlapping state of the pixels. Adjust the position in the plane direction. In this state, the holder is separated vertically, the release sheet is peeled off, the holder is lowered again, and the ends of the panels are overlapped without any displacement. As the pressure-sensitive adhesive film, a method in which a release sheet is transparent is used. Such a method can be adopted in each of the embodiments after the second embodiment.

Subsequently, by sliding the flat plate 32 in the direction of arrow 35, the pressing roller 34 provided at a predetermined position
The first and second display elements 6A and 6B are overlapped and laminated while sequentially rotating the second display element 6B against the first display element 6A while rotating in the direction of the arrow 43 in the figure. 1 (b)]. Instead of moving the flat plate 32 with respect to the roller 34, the position of the flat plate 32 is fixed, and the roller 34 is rotated while moving in the direction opposite to the arrow 35, or both the flat plate 32 and the roller 34 are mutually moved. It may be moved in the opposite direction.

Subsequently, the first and second display elements 6A and 6B are opened from above the flat plate 32 by closing the electromagnetic valve 38. FIG. 1C shows the first and second display elements 6A and 6B in a state where the display elements are detached from the flat plate 32.
The entire two display elements are convexly curved in the direction toward the second display element 6B.

If the warpage is large, the upper and lower display elements are misaligned, and the image quality is degraded. Further, when the warped display element is returned to a flat surface for mounting, stress is generated in the display element, which may lead to breakage of the display element, for example, cracking of an electrode. The present inventors have proposed that when the two display elements are bonded together, the display element facing the roller, which is a pressing member, is slightly stretched in the roller moving direction by the pressing of the roller, so that the two display elements are bonded together. It is assumed that the upper display element facing the roller is longer than the lower display element arranged on the flat plate in the state in which the display element is placed, and the entire display element becomes convex toward the upper display element. are doing. Further, it is considered that warping becomes remarkable by bonding the third display element to the convex surface side in the same manner.

As shown in FIG. 1 (a), since two adhesive sheets are adhered in a state where the display element is flat,
The step of attaching an adhesive sheet to a warped display element as shown in FIG. 1C is omitted, and the manufacturing process is simplified.

Therefore, in the present embodiment, the first and second display elements 6A and 6B are placed on the flat plate 32 in a predetermined state with the surface of the first element 6A to which the adhesive sheet 31 is attached facing upward. It is arranged at a position and fixedly adsorbed [FIG. 2 (d)].
After peeling off the release sheet on the other surface of the adhesive sheet 31 and adjusting the height of the axis of the pressing roller 34 with respect to the flat plate 32,
Lastly, while the third display element 6C is sequentially pressed against the first display element 6A by the pressing roller 34, the third display element 6C is overlapped and attached to the first display element 6A [ FIG. 2 (e)]. FIG. 2F shows a state in which the first, second, and third display elements 6A, 6B, and 6C are bonded together. As described above, the third display element 6C is connected to the second display element 6C. By pasting the first display element 6A from the side opposite to the side to which the display element 6B is pasted, the warpage shown in FIG. 1C is canceled, and a flat display device as a whole can be manufactured.

In this embodiment, since the display element initially mounted on the flat plate eventually becomes the center element when three display elements are stacked, the element stacking order is considered in advance.
The display element (green display element in the embodiment of FIG. 8) stacked in the center is first placed on a flat plate.

The light-absorbing layer may be painted black on the back surface of the display element farthest from the observation side after or before element lamination, or may be black on the back surface of the display element farthest from the observation side. Such a method can be provided.

(Second Embodiment) FIG. 3 is a process chart showing a second embodiment of the display device manufacturing method according to the present invention. In the present embodiment, the display elements are attached to each other in a state where the display elements are arranged on the support base 44 having the concave support surface 44a. Since the support surface 44a is concave,
A different display element will be attached to the concavely curved display element while sequentially pressing it with a roller, and the lower display element curved in the concave shape will cancel the warpage in the direction toward the upper display element, as a whole A flat display device can be manufactured. In FIG. 3, the curvature of the support surface 44a is shown in an emphasized manner, and an adhesive sheet for bonding the display elements is omitted.

More specifically, the first display element 6A provided with an adhesive sheet on one side is supported on a support base 4 fixed at a predetermined position.
4, and one end of the second display element 6B and one end of the first display element 6A are positioned by an appropriate positioning means.
Subsequently, with the other end of the second display element 6B held by the holding member 46, the rotatable pressing roller 48 is
It is moved in the direction of arrow 50 while maintaining a predetermined distance from 4a [FIG. 3 (a)]. At this time, the pressing roller 48 rotates in the direction of the arrow 52 in the drawing, and overlaps the first and second display elements 6A and 6B while pressing the second display element 6B against the first display element 6A. I will go along.

FIG. 3B shows a state where the first and second display elements 6A and 6B are removed from the support base 44 after the step of FIG. 3A. In this case, the first and second display elements 6A and 6B are removed. The whole of the two display elements 6A and 6B are stuck flat as shown in the figure.

The second display element 6B is replaced with the first display element 6A.
After attaching the display elements 6A and 6B to the support 4
4 while being fixedly adsorbed on the second display element 6.
The third display element 6C is attached on B using a pressure roller 48 via an adhesive sheet [FIG. 3 (c)]. Note that, as described with reference to FIG. 3B, since the bonded element is flat, the first display element 6A differs from the above-described procedure.
May be fixed and adsorbed to the support base 44 with the second display element 6B on the lower side and the third display element 6C attached. In any case, the three display elements 6A, 6B, 6C
After attaching to the support base 44,
As shown in FIG. 3D, these display elements 6A, 6A
The entirety of B and 6C is stuck flat.

Since the stacked display elements are flat as shown in FIG. 3B, an adhesive sheet may be provided on the upper surface of the display element 6B or the lower surface of the display element 6A at this time, or prior to the lamination. An adhesive sheet may be provided on the upper surface of the display element 6B or the lower surface of the display element 6A in advance.

In order to manufacture a display device without warpage with higher accuracy, different curvatures are used for bonding two display elements and for bonding another display element to the two bonded display elements. A support surface may be used.

(Third Embodiment) FIG. 4 is a process chart showing a third embodiment of the display device manufacturing method according to the present invention. In this embodiment, the display elements are attached to each other while passing between a pair of pressing rollers. In FIG. 4, an adhesive sheet for bonding display elements to each other is not shown.

More specifically, the first and second display elements 6A, 6B are provided between a pair of pressing rollers 60, 62, which are rotatably supported and whose rotating shafts are arranged at a predetermined interval.
Are held at one end of these elements by holding members 64 and 66,
The other end is made to enter while being aligned by a suitable alignment means. Next, while rotating the pressing rollers 60 and 62 in the directions of arrows 68 and 70, respectively, the first and second
By pressing the display elements 6A and 6B, the first and second display elements 6A and 6B are conveyed downstream (in the direction of the arrow 72) while being bonded [FIG. 4 (a)]. Since both the first and second display elements 6A and 6B are bonded while being pressed by the pressing rollers 60 and 62, respectively (that is, the two display elements 6A and 6B are bonded under substantially equivalent conditions). As in the first embodiment, it is possible to prevent warpage caused by pressing the pressing roller from only one display element side.

After adjusting the distance between the pair of pressing rollers 60 and 62, the first and second display elements 6A and 6B are bonded in the same manner as in the step of bonding the first and second display elements 6A and 6B. And the third display element 6C are adhered while passing between the pair of pressing rollers 60 and 62 [FIG. 4B]. Also in this case, since both the first and second display elements 6A and 6B and the third display element 6C that are bonded are pressed by the pressing rollers 60 and 62, respectively, the warpage is less likely to occur.

(Fourth Embodiment) FIG. 5 is a process chart showing a fourth embodiment of the display device manufacturing method according to the present invention. In the present embodiment, three display elements are bonded at one time while passing between a pair of pressing rollers.

More specifically, the first, second and third display elements 6 are provided between a pair of pressing rollers 80 and 82 which are rotatably supported and whose rotation shafts are arranged at a predetermined interval.
A, 6B and 6C are inserted with one end of each of these elements being held by a holding member (not shown) and the other end being aligned by a suitable alignment means. Next, the pressing roller 8
By pressing the second and third display elements 6B and 6C across the first display element 6A while rotating 0 and 82 in the directions of arrows 84 and 86, respectively, the first, second and third elements are pressed. The display elements 6A, 6B, and 6C are bonded together via an adhesive sheet (not shown) between the first and second display elements 6A and 6B and the first and third display elements 6A and 6C. It is transported downstream (in the direction of arrow 88).

(Other Embodiments) In the above embodiment,
Although the method for bonding three display elements has been described, the manufacturing method according to the present invention can be applied to bonding a flexible member other than the display element to the display element. For example, using the manufacturing method according to the first embodiment, instead of the third display element, as shown in FIG. 6, another supporting member 90 or the like having flexibility but holding the shape of the entire display device is used. Panel may be attached.

As shown in FIG. 7, a support member 92 having flexibility but retaining the shape of the entire display element is attached to one of the three display elements 6A, 6B and 6C. At the same time, another panel such as a protective film 94 may be attached to the other surface. The support members 90 and 92 may also serve as a light absorbing layer.

6 and 7, the manufacturing method according to the first embodiment is used, and therefore, the odd-numbered layers (three layers, five layers) are used.
Layer) is suitable for manufacturing a display device including the above-described odd-numbered layers as well as even-numbered layers (two-layer, four-layer, etc.). It is also suitable for manufacturing a display device. Both methods can prevent warpage by a very simple method.Moreover, in order to prevent warpage, there is no need to use special materials for the substrate, adhesive layer, panel, etc. There are few restrictions.

In each embodiment, the pressing is performed sequentially from one end to the other end of the panel. However, the pressing may be performed sequentially from the center to the end. Further, in any of the embodiments, a roller is used as the pressing member, but instead of the roller, a convex curved surface member having a large curvature may be sequentially pressed, or a convex which does not rotate but has a high surface smoothness. Pressing may be performed by scanning a curved surface member relative to the panel.

[0050]

According to the present invention, a display element having high flatness can be manufactured. In the case where a plurality of display elements are stacked, displacement of the display elements is suppressed, and thus a display device that accurately displays a desired image can be provided.

[Brief description of the drawings]

FIG. 1 is a process chart showing a first embodiment of a display device manufacturing method according to the present invention.

FIG. 2 is a process chart showing a first embodiment of a display device manufacturing method according to the present invention.

FIG. 3 is a process chart showing a second embodiment of the display device manufacturing method according to the present invention.

FIG. 4 is a process chart showing a third embodiment of the display device manufacturing method according to the present invention.

FIG. 5 is a process chart showing a fourth embodiment of the display device manufacturing method according to the present invention.

FIG. 6 is a process chart showing another embodiment of the display device manufacturing method according to the present invention.

FIG. 7 is a process chart showing still another embodiment of the display device manufacturing method according to the present invention.

FIG. 8 is a detailed cross-sectional view of a liquid crystal display device.

[Explanation of symbols]

 2: liquid crystal display device 6: display element 22, 24: film substrate 26: display layer 30, 31, adhesive sheet 32: flat plate (table) 34, 48, 68, 70, 80, 82: pressing roller 42, 46: holding Member 44: support base 44a: concave support surface of support base 90, 92: support member 94: protective film

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahide Ueda 2-3-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka F-term in Osaka International Building Minolta Co., Ltd. 2H089 HA32 KA01 QA08 QA16 TA01 TA06 TA12 5C094 BA43 DA03 DA06 DA11 GB01 5G435 BB12 EE10 KK03 KK05 KK10

Claims (20)

[Claims] 1. A display element in which a display layer is sandwiched between a pair of flexible substrates, a first flexible panel, and a second flexible panel are stacked. In the method for manufacturing a display device, a first step of bonding the first panel to the display element by sequentially pressing the first panel with a pressing member on one side of the display element via an adhesive layer; A second step of sequentially pressing the second panel with the pressing member on the other surface of the display element via an adhesive layer to bond the second panel to the display element. 2. The method according to claim 1, wherein the first step and the second step are sequentially performed. 3. The first step is performed in a state where the display element is supported on a flat surface, and the second step is performed by mounting the bonded display element and the first panel on a flat surface. 3. The method according to claim 2, wherein the step is carried out in a state of being supported.
Manufacturing method. 4. The method according to claim 3, wherein in the first and / or second step, the pressing member is relatively moved along the flat surface. 5. The display device according to claim 1, wherein the first panel is a second display element having a display layer sandwiched between a pair of flexible substrates. The manufacturing method as described. 6. The display device according to claim 1, wherein the second panel is a third display element having a display layer sandwiched between a pair of flexible substrates. The manufacturing method as described. 7. A method for manufacturing a display device in which a display element having a display layer sandwiched between a pair of flexible substrates and a first panel having flexibility is laminated, a display on a concave surface is provided. A first step of arranging the elements, and sequentially pressing the first panel by a pressing member via an adhesive layer on one side of the display elements arranged on the concave surface, thereby causing the first panel to be pressed by the display element. And a second step of pasting to the substrate. 8. The method according to claim 7, wherein the first panel is a second display element having a display layer sandwiched between a pair of flexible substrates. 9. The method according to claim 7, wherein in the first and / or second step, the pressing member is relatively moved along the concave surface. 10. After the second step, the display element and the first panel bonded to each other are arranged on a concave surface so that the display element faces the concave surface, and an adhesive layer is formed on one surface of the first panel. The manufacturing method according to claim 7, further comprising a third step of sequentially pressing the second panel having flexibility with the pressing member via the step (c), thereby bonding the second panel to the first panel. 11. After the second step, the display element and the first panel bonded to each other are arranged on the concave surface such that the first panel faces the concave surface, and the display element and the first panel are bonded to the other surface of the display element. 8. The method according to claim 7, further comprising a third step of sequentially pressing the flexible second panel with the pressing member via the layer to bond the second panel to the display element.
Manufacturing method. 12. The manufacturing method according to claim 10, wherein the second panel is a third display element having a display layer sandwiched between a pair of flexible substrates. Method. 13. A method for manufacturing a display device in which a display element having a display layer sandwiched between a pair of flexible substrates and a first panel having flexibility is laminated, wherein the display element and A manufacturing method including a step of bonding a display element and a first panel by passing a first panel between a pair of rollers with an adhesive layer interposed therebetween. 14. The method according to claim 13, wherein the first panel is a second display element having a display layer sandwiched between a pair of flexible substrates. 15. A pair of a display element and a first panel which are bonded to each other and a second panel having flexibility are arranged at a predetermined interval with an adhesive layer interposed therebetween. By passing between the rollers, the second panel is
The manufacturing method according to claim 13, further comprising a step of bonding the display element and the first panel to each other. 16. The method according to claim 15, wherein the second panel is a third display element having a display layer sandwiched between a pair of flexible substrates. 17. A display element in which a display layer is sandwiched between a pair of flexible substrates, a first flexible panel, and a second flexible panel are stacked. In the method for manufacturing a display device, the display element, the first panel, and the second panel each have an adhesive layer interposed between the display element and the first panel and between the display element and the second panel. A manufacturing method including a step of simultaneously bonding three members by passing between a pair of rollers in a state. 18. The method according to claim 17, wherein the first panel is a second display element having a display layer sandwiched between a pair of flexible substrates. 19. The manufacturing method according to claim 17, wherein the second panel is a third display element having a display layer sandwiched between a pair of flexible substrates. Method. 20. The method according to claim 1, wherein the adhesive layer is an adhesive sheet.