KR20170061804A - Method of manufacturing display device - Google Patents

Method of manufacturing display device Download PDF

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Publication number
KR20170061804A
KR20170061804A KR1020150166712A KR20150166712A KR20170061804A KR 20170061804 A KR20170061804 A KR 20170061804A KR 1020150166712 A KR1020150166712 A KR 1020150166712A KR 20150166712 A KR20150166712 A KR 20150166712A KR 20170061804 A KR20170061804 A KR 20170061804A
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KR
South Korea
Prior art keywords
transparent member
bending
bent
display device
flat
Prior art date
Application number
KR1020150166712A
Other languages
Korean (ko)
Inventor
황성진
김지연
조종환
히로유키 네모토
이장두
정철호
Original Assignee
삼성디스플레이 주식회사
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Publication date
Application filed by 삼성디스플레이 주식회사 filed Critical 삼성디스플레이 주식회사
Priority to KR1020150166712A priority Critical patent/KR20170061804A/en
Publication of KR20170061804A publication Critical patent/KR20170061804A/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

A method of manufacturing a foldable display device folded or unfolded about a folding axis extending in one direction comprises the steps of providing a transparent member bent along a bending axis extending in one direction, RTI ID = 0.0 > a < / RTI >

Description

[0001] METHOD OF MANUFACTURING DISPLAY DEVICE [0002]

The present invention relates to a display device manufacturing method, and more particularly, to a method of manufacturing a display device.

The display device displays various images on the display screen to provide information to the user. Generally, the display module displays information within the allocated screen. BACKGROUND ART [0002] Recently, a foldable display device having a flexible display member that can be bent is being developed.

Foldable display devices can be folded or unfolded to have the same effect as viewing a book. The folder-type display device, which can be variously changed in shape, can be carried regardless of the existing screen size, and the user convenience is improved.

Therefore, the present invention relates to a method of manufacturing a foldable display device with improved reliability.

A method of manufacturing a display device for manufacturing a foldable display device folded or unfolded around a folding axis extending in one direction includes the steps of providing a transparent member bent along the bending axis extending in one direction, And bonding the protection member to the protection member in a flat state.

The bended transparent member may be glass.

The thickness of the bent transparent member may be 100 탆 or less.

The step of providing the bendable transparent member may include providing a flat transparent member, heat treating the flat transparent member, and bending the heat treated flat transparent member to form the bendable transparent member . ≪ / RTI >

The heat treatment may be performed at a temperature of 600 to 800 degrees Celsius.

The method of manufacturing a display device according to an embodiment of the present invention further includes slow cooling the heat-treated flat transparent member, bending the slowly cooled transparent member along the bending axis, A transparent member can be formed.

The heat-treated flat transparent member may be bonded to the jig and bent.

The jig may be robot arms coupled to both ends of the heat treated flat transparent member.

The jig may be a refractory brick.

INDUSTRIAL APPLICABILITY According to the present invention, a foldable display device can be manufactured using a bent transparent member having a folding angle. The bent transparent member can function as a window of the display device.

By forming the foldable display device using the bent transparent member, the folding stress applied to the window when the foldable display device is folded can be reduced. Thus, the deformation of the window is reduced, and the reliability of the display device can be improved.

1 is an exploded perspective view of a display device according to an embodiment of the present invention.
2A to 2C are combined perspective views of a display device according to an embodiment of the present invention.
FIGS. 3A through 3C are cross-sectional views illustrating shapes of a bending transparent member according to an embodiment of the present invention. FIG.
4 is a perspective view showing an embodiment of a display device according to an embodiment of the present invention.
5A to 5D show a method of manufacturing a window according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is an exploded perspective view of a display device according to an embodiment of the present invention. 2A to 2C are combined perspective views of a display device according to an embodiment of the present invention. 2A to 2C show display devices in various states for easy explanation. Hereinafter, the display device will be described with reference to Figs. 1 to 2C.

The display device DS includes a bending transparent member 100 and a protective member 200. The bending transparent member 100 may have a high transmittance so that the incident light is transmitted. The bending transparent member 100 functions as a cover window of the display device DS.

A predetermined bending axis BX may be defined in the bending transparent member 100. [ The bending axis BX extends along the second direction D2 across the bending transparent member 100 when both ends of the bending transparent member 100 are facing each other in the first direction D1.

The bending transparent member 100 may have a predetermined bending angle [theta] B. The bending transparent member 100 is provided in a bent state at a bending angle? B along the bending axis BX. The bending axis BX coincides with the folding axis FX of the display device DS as an imaginary line.

The bending transparent member 100 may be divided into a first portion 110 and a second portion 120 about a bending axis BX. Depending on the relative movement of the first portion 110 and the second portion 120, the shape of the bended transparent member 100 may vary.

The bending transparent member 100 may be designed to have flexibility. The flexibility of the bending transparent member 100 can mean the degree of flexibility that a member of a rigid material has as a result of having a thin film thickness.

For example, the bending transparent member 100 may be a thin film substrate made of glass. The flexibility of the bending transparent member 100 may vary depending on the content ratio of materials constituting the glass, the manufacturing process, and the like.

At this time, the bent transparent member 100 may have a thickness of about 100 탆 or less. The bending transparent member 100 according to an exemplary embodiment of the present invention may be formed of various materials and is not limited to any one embodiment.

The protective member 200 defines the appearance of the display device DS. The protective member 200 receives the bending transparent member 100 and determines the shape of the bending transparent member 100. The bent transparent member 100 is received in the protective member 200 and the shape of the transparent member 100 bent according to the shape of the protective member 200 is determined.

The protective member 200 may include a plurality of receiving members 210 and 220 and a coupling member 230. The accommodation members 210 and 220 include a first accommodation member 210 and a second accommodation member 220 arranged along the first direction D1.

The first housing member 210 accommodates the first portion 110 and the second housing member 220 accommodates the second portion 120. The movement of the first part 110 and the second part 120 is dependent on the movement of the first receiving member 210 and the second receiving member 220, respectively.

The coupling member 230 is disposed between the first and second receiving members 210 and 220 so that the first and second receiving members 210 and 220 are integrally formed with the first and second receiving members 210 , 220). The first and second receiving members 210 and 220 move relative to each other about the coupling member 230.

The display device DS is folded or unfolded along a predetermined folding axis FX. The folding axis FX can be defined between the first and second receiving members 210 and 220 and can overlap with the engaging member 230. [ The display device DS is folded or unfolded according to the movement of the first and second housing members 210 and 220. [

The coupling member 230 may include first coupling portions 231A and 231B and second coupling portions 232A and 232B. The first engaging portions 231A and 231B are disposed apart from each other along the second direction D2 with the first and second receiving members 210 and 220 interposed therebetween. The first coupling portions 231A and 231B couple one side of the accommodation members 210 and 220 and the other sides of the first and second accommodation members 210 and 220, respectively.

The bending transparent member 100 has a shape bent along the bending axis BX before being assembled to the display device DS. The bending axis BX can be defined at the point of bending with the largest curvature in the bending transparent member 100. [ Thereafter, when the display device DS is assembled, the shape of the bent transparent member 100 can be determined by the protective member 200. [

As shown in Fig. 2A, the display device DS may have a shape bent at a predetermined angle along the folding axis FX. Alternatively, as shown in Fig. 2B, the display device DS can be completely folded about the folding axis FX. At this time, the bent transparent member 100 may have a bent or folded shape corresponding to the shape of the display device DS.

Alternatively, as shown in Fig. 2C, the display device DS can be fully opened around the folding axis FX. At this time, the bent transparent member 100 may have a flat shape parallel to the plane defined by the first direction D1 and the second direction D2. A detailed description of the bent transparent member 100 will be described later.

FIGS. 3A through 3C are cross-sectional views illustrating shapes of a bending transparent member according to an embodiment of the present invention. FIG. 3A to 3C are respectively shown to correspond to FIGS. 2A to 2C for easy explanation.

3A, when the display device DS is in the shape shown in Fig. 2A, the bending transparent member 100 can be bent at a first angle? 1 about the bending axis BX have. At this time, the first angle? 1 may correspond to the bending angle? B (see FIG. 1) of the bending transparent member 100 before being assembled into the display device DS. Accordingly, the bending transparent member 100 may not be subjected to any stress even in the bending state.

As shown in Fig. 3B, when the display device DS is in the shape shown in Fig. 2B, the bending transparent member 100 can be completely bent around the bending axis BX. The bending angle at this time may be smaller than the first angle? 1 . For ease of explanation, FIG. 3B shows an embodiment in which the bending transparent member 100 is bent at a bending angle of 0 degrees. On the other hand, this is illustratively shown, and the bending transparent member 100 may be bent to have a predetermined curvature about the bending axis BX.

Referring again to FIG. 3B, the bent transparent member 100 is subjected to the first stress PS1 so as to have a bending angle smaller than the first angle? 1 . The first stress PS1 may be equal to the magnitude of the external force exerted on the bending transparent member 100 and at the same time the magnitude of the repulsive force for restoring the bending transparent member 100 back to its original state. At this time, the first stress PS1 may be smaller than the stress required to bend the flat transparent member to the shape corresponding to FIG. 3B.

As shown in Fig. 3C, when the display device DS is in the shape shown in Fig. 2C, the bending transparent member 100 can be fully extended about the bending axis BX. At this time, the bent transparent member 100 may have a second bending angle of the angle (θ 2), the angle may be a 2 (θ 2) is substantially 180.

At this time, the bending transparent member 100 is subjected to the second stress PS2 to be realized in a flat shape. As described above, the second stress PS2 is equal to the magnitude of the external force exerted on the bending transparent member 100, and is equal to the magnitude of the repulsive force for restoring the bending transparent member 100 back to its original state can do.

The bending transparent member 100 is assembled with the display device DS while being bent at a pre-assembly bending angle? B. Accordingly, in order to maintain a flat state, it is necessary to provide a pressing force in the direction opposite to the third direction D3.

At this time, the second stress PS2 may be smaller than the first stress PS1. The magnitude of the first stress PS1 and the magnitude of the second stress PS2 are each dependent on the bending angle? B of the bending transparent member 100.

1) according to an exemplary embodiment of the present invention includes the bending transparent member 100, so that the first stress PS1 having a size smaller than that of bending the transparent member in a flat state The display device DS can be bent.

The second stress PS2 has a smaller magnitude than the first stress PS1 so that the bending of the transparent member 100 is substantially the same as the first stress PS2 because a second stress PS2 is additionally required to realize a flat state. Less impact. Accordingly, as the display apparatus DS according to the embodiment of the present invention is folded or unfolded, the repulsive force on the bending transparent member 100 can be reduced, and the bending transparent member 100 100 can be prevented from being deformed.

4 is a cross-sectional view illustrating a bending transparent member according to an embodiment of the present invention. As shown in Fig. 4, the bending transparent member 100-1 may be a bent shape in a plurality of regions. A plurality of bending axes BX1, BX2, BX3 can be defined in the bending transparent member 100-1. The plurality of bending axes BX1, BX2, and BX3 can be defined in a portion where the bending transparent member 100-1 has the largest curvature in a predetermined bending region.

The bending transparent member 100-1 is bent at a first bending angle? Ba in a portion of the plurality of bending axes BX1, BX2, BX3 where the first bending axis BX1 is defined. The bending transparent member 100-1 is bent at a second bending angle? Bb at a portion where the second bending axis BX2 of the plurality of bending axes BX1, BX2 and BX3 is defined. The bending transparent member 100-1 is bent at a third bending angle? Bc in a portion of the plurality of bending axes BX1, BX2, BX3 where the third bending axis BX3 is defined.

The bending transparent member 100-1 is bent inward in each of the portions of the plurality of bending axes BX1, BX2 and BX3 where the first bending axis BX1 and the third bending axis BX3 are defined, And bends outward at a portion of the plurality of bending axes BX1, BX2, BX3 where the second bending axis BX2 is defined.

On the other hand, this is illustrated by way of example, and the bending transparent member 100-1 according to an embodiment of the present invention can be bent at various regions, and the degree of bending or bending direction for each region is different can do. The bending transparent member 100-1 according to an embodiment of the present invention includes a plurality of regions previously bended, thereby alleviating the folding stress caused by the folding of the collapsible display device.

5 is a perspective view showing an embodiment of a display device according to an embodiment of the present invention. 5, the protective member 200 (see FIG. 1) is omitted for easy explanation.

As shown in FIG. 5, the display device may further include a display member 300 coupled to the bending transparent member 100. The display member 300 is coupled to one side of the bending transparent member 100. Accordingly, the display member 300 can have a shape corresponding to the bending transparent member 100-1.

At this time, the bent transparent member 100-1 may have a bending angle? B1 before being assembled, and the bending angle? B1 may be substantially larger than the bending angle? B shown in FIG. 1 .

On the other hand, this is an exemplary illustration, and the bending angle &thetas; B1 is determined by the flexibility of the display member 300, the bending angle of the bending transparent member 100-1, And is not limited to any one embodiment.

6A to 6D show a method of manufacturing a window according to an embodiment of the present invention. 6A to 6D, a method of forming a window will be described.

As shown in Fig. 6A, a flat transparent member 100-R is provided. The flat transparent member 100-R may be in the form of a plate parallel to a predetermined plane in the entire region.

At this time, the flat transparent member 100-R is heat-treated. The flat transparent member 100-R is exposed to heat (HT) at a temperature of about 600 degrees to about 800 degrees. Although not shown, the heat treatment (HT) can proceed in an electric furnace.

As shown in FIG. 6B, the heat-treated transparent member 100-H is subjected to a slow cooling process (CT). The slow cooling process (CT) can prevent deformation of the heat-treated transparent member 100-H in accordance with the residual stress. Although not shown, the slow cooling process (CT) can proceed in an electric furnace.

As shown in Fig. 6C, the annealed transparent member 100-C is bent. The annealed transparent member 100-C may be bent by a predetermined jig ZG. The jig (ZG) can have various structures.

For example, as shown in Fig. 6C, the jig ZG may be a plurality of robot arms coupled to each of the two stages of the slow cooling transparent member 100-C. The jig ZG moves the both ends of the slow-cooling transparent member 100-C so that the both ends of the slowly cooled transparent member 100-C are brought close to each other to bend the slowly cooled transparent member 100- do.

As the both ends of the transparent member 100-C annealed according to the jig ZG are closer to each other, the bending strength becomes larger. Further, the bending time increases as the slow cooling transparent member 100-C is maintained in the bending state. By controlling the bending strength and bending time,

Alternatively, although not shown, the jig ZG may be a structure extending along one direction and having a plurality of grooves parallel to each other. As the both ends of the annealed transparent member 100-C are respectively bonded to the grooves, the annealed transparent member 100-C can be folded.

At this time, the jig ZG may be a member having a fireproof property. For example, the jig ZG may be a refractory brick extending along one direction on one side and defining two grooves parallel to each other. The transparent member 100-C subjected to the slow cooling process can be bent by inserting both ends of the slowly cooled transparent member 100-C into the respective grooves. As the spaced distance of the grooves approaches, the curvature of the bending transparent member 100 may increase. The jig ZG may be a mold of various shapes capable of bending the slowly cooled transparent member 100-C, and is not limited to any one embodiment.

The gradually cooled transparent member 100-C can be bent in various shapes according to the structure of the jig ZG. For example, as shown in Fig. 6C, the annealed transparent member 100-C may be bent with a predetermined curvature.

Alternatively, although not shown, the annealed transparent member 100-C may be bent in an irregular shape with various curvatures depending on the position. Alternatively, although not shown, the slow-cooling transparent member 100-C may be bent at only one portion and the remaining portion may not be bent. The annealed transparent member 100-C may be bent into various shapes and is not limited to any one embodiment.

As shown in FIG. 6D, the transparent member 100 bent through the bending process is formed. The bending transparent member 100 may be bent at a predetermined bending angle? B about a point at which the bending axis BX is defined.

The bending angle? B may be a factor indicating the extent to which the transparent member 100 is bent when the jig ZG is removed in Fig. 6C. The bending angle [theta] B may have an angle of more than 0 degrees and less than 180 degrees, as the bending angle [theta] B of the flat plane is 180 degrees.

The bending angle &thetas; B may vary depending on the bending strength or the bending time. The greater the bending strength, the longer the bending time, the greater the bending angle? B. As described above, the folding stress on the transparent member 100 when the display device DS is in the folded state can be alleviated as the bending angle? B is increased.

On the other hand, the larger the bending angle? B , the greater the unfolding stress on the transparent member 100 when the display device DS is unfolded. Accordingly, the bending transparent member 100 according to the present invention may have a bending angle? B capable of generating unfolding stress and folding stress to such an extent that the bending transparent member 100 is not deformed .

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that various modifications and changes may be made thereto without departing from the scope of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

DS: Display device 100: Bending transparent member
200: Protective member BX: Bending axis
FX: Folding axis 300: Display member

Claims (9)

A method of manufacturing a foldable display device folded or unfolded around a folding axis extending in one direction,
Providing a transparent member that is bent along the bending axis extending in one direction; And
And bonding the bent transparent member to the protection member in a flat state. The method according to claim 1,
Wherein the bent transparent member is made of glass. 3. The method of claim 2,
Wherein the thickness of the bending transparent member is 100 占 퐉 or less. The method according to claim 1,
Wherein providing the bended transparent member comprises:
Providing a flat transparent member;
Heat treating the flat transparent member; And
And bending the heat-treated flat transparent member so that the bent transparent member is formed. 5. The method of claim 4,
Wherein the heat treatment is performed at a temperature of 600 DEG C or more and 800 DEG C or less. 5. The method of claim 4,
Further comprising slow cooling the heat-treated flat transparent member,
Wherein the bendable transparent member is formed by bending the slowly cooled flat transparent member along the bending axis. 5. The method of claim 4,
Wherein the heat-treated flat transparent member is bonded to the jig and bent. 8. The method of claim 7,
Wherein the jig is robot arms coupled to both ends of the heat treated flat transparent member. The method of claim 7,
Wherein the jig is a refractory brick.
KR1020150166712A 2015-11-26 2015-11-26 Method of manufacturing display device KR20170061804A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109523920A (en) * 2018-08-07 2019-03-26 *** A kind of folding stand, display, keyboard and electric appliance
WO2020119008A1 (en) * 2018-12-13 2020-06-18 武汉华星光电半导体显示技术有限公司 Foldable display apparatus
US10698446B2 (en) 2018-06-12 2020-06-30 Samsung Display Co., Ltd. Display apparatus
CN111986567A (en) * 2019-05-22 2020-11-24 三星显示有限公司 Manufacturing method of display module
US10908644B2 (en) 2018-10-30 2021-02-02 Samsung Display Co., Ltd. Display device including a hinge and support portions having an increasing thickness
CN112396959A (en) * 2020-11-11 2021-02-23 武汉华星光电半导体显示技术有限公司 Display device
US11690275B2 (en) 2020-04-13 2023-06-27 Samsung Display Co., Ltd. Method of fabricating display device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10698446B2 (en) 2018-06-12 2020-06-30 Samsung Display Co., Ltd. Display apparatus
US10969828B2 (en) 2018-06-12 2021-04-06 Samsung Display Co., Ltd. Display apparatus
CN109523920A (en) * 2018-08-07 2019-03-26 *** A kind of folding stand, display, keyboard and electric appliance
CN109523920B (en) * 2018-08-07 2020-09-15 *** Folding leg, display, keyboard and electric appliance
US10908644B2 (en) 2018-10-30 2021-02-02 Samsung Display Co., Ltd. Display device including a hinge and support portions having an increasing thickness
WO2020119008A1 (en) * 2018-12-13 2020-06-18 武汉华星光电半导体显示技术有限公司 Foldable display apparatus
CN111986567A (en) * 2019-05-22 2020-11-24 三星显示有限公司 Manufacturing method of display module
US11609604B2 (en) 2019-05-22 2023-03-21 Samsung Display Co., Ltd. Method for manufacturing display module
US11690275B2 (en) 2020-04-13 2023-06-27 Samsung Display Co., Ltd. Method of fabricating display device
CN112396959A (en) * 2020-11-11 2021-02-23 武汉华星光电半导体显示技术有限公司 Display device

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