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WO2021022405A1 - 显示装置和显示装置的制造方法 - Google Patents

显示装置和显示装置的制造方法 Download PDF

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Publication number
WO2021022405A1
WO2021022405A1 PCT/CN2019/099038 CN2019099038W WO2021022405A1 WO 2021022405 A1 WO2021022405 A1 WO 2021022405A1 CN 2019099038 W CN2019099038 W CN 2019099038W WO 2021022405 A1 WO2021022405 A1 WO 2021022405A1
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WO
WIPO (PCT)
Prior art keywords
panel
distance
film
display device
bent
Prior art date
Application number
PCT/CN2019/099038
Other languages
English (en)
French (fr)
Inventor
赵二瑾
蒋志亮
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to JP2019565536A priority Critical patent/JP7466311B2/ja
Priority to PCT/CN2019/099038 priority patent/WO2021022405A1/zh
Priority to US16/957,572 priority patent/US11839135B2/en
Priority to CN201980001249.5A priority patent/CN112740435B/zh
Publication of WO2021022405A1 publication Critical patent/WO2021022405A1/zh

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Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/87—Arrangements for heating or cooling
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/1201—Manufacture or treatment
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/122—Pixel-defining structures or layers, e.g. banks
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8794—Arrangements for heating and cooling

Definitions

  • the embodiment of the present disclosure relates to a display device and a method of manufacturing the display device.
  • the end of the flexible panel connected with the external circuit can be bent (or flipped) toward the back side of the panel.
  • At least one embodiment of the present disclosure provides a display device including a flexible panel and a protective film.
  • the flexible panel includes a first panel part, a second panel part, and a bent part connected between the first panel part and the second panel part.
  • the protective film is adhered to the surface of the non-display side of the flexible panel, and includes a first film portion adhered to the first panel portion and a second film portion adhered to the second panel portion .
  • the flexible panel is bent at the bent portion so that the first panel part and the second panel part overlap each other in a first direction perpendicular to the surface.
  • the first edge of the first film portion close to the second film portion is a first distance from the first boundary between the first panel portion and the bent portion
  • the second film portion is close to
  • the second edge of the first film portion is a second distance from the second boundary between the second panel portion and the bent portion, and the sum of the first distance and the second distance is greater than 0, And neither the first distance nor the second distance is less than zero.
  • the first distance is equal to zero.
  • the second distance is equal to zero.
  • the first distance and the second distance are both greater than zero.
  • the flexible panel further includes a first alignment mark provided in the first panel portion and a second alignment mark provided in the second panel portion, the first alignment mark and The second alignment mark is used for alignment when the bent portion is bent.
  • At least one of the first distance and the second distance is greater than or equal to the absolute value of the maximum deviation of the alignment of the first alignment mark and the second alignment mark and The sum of the absolute value of the maximum manufacturing deviation of the width of the opening between the first film portion and the second film portion.
  • At least one of the first distance and the second distance is in a range greater than 0 and less than or equal to 200 ⁇ m.
  • the display device further includes a heat dissipation film.
  • the heat dissipation film In the first direction, the heat dissipation film is between the first film portion and the second film portion, and the heat dissipation film covers the entire first film portion.
  • the flexible panel is bent at the bent portion such that the second film portion contacts the first film portion.
  • the first panel portion includes a display unit, the display unit includes a plurality of pixels, and each pixel includes a light-emitting element and a pixel circuit.
  • the display device further includes: a flexible printed circuit board.
  • the flexible printed circuit board is connected to the second panel part.
  • At least one embodiment of the present disclosure also provides a method for manufacturing a display device, including: adhering a protective film to a non-display side surface of a flexible panel, the flexible panel including a first panel part, a second panel part, and a connection The bent portion between the first panel portion and the second panel portion; remove a portion of the protective film to form a first film portion adhered to the first panel portion and adhere to The second film portion of the second panel portion; and the bending portion is bent so that the first panel portion and the second panel portion are in a first direction perpendicular to the non-display side surface of each other Overlap upwards.
  • the first edge of the first film portion close to the second film portion is a first distance from the first boundary between the first panel portion and the bent portion, and the second film portion
  • the second edge close to the first film portion is a second distance from the second boundary between the second panel portion and the bent portion, and the sum of the first distance and the second distance is greater than 0 , And neither the first distance nor the second distance is less than zero.
  • bending the bending part includes: fixing one of the first panel part and the second panel part; and turning over the first panel part and the second panel part The other one of them causes the first alignment mark provided in the first panel portion and the second alignment mark provided in the second panel portion to be aligned.
  • the first distance is equal to zero.
  • the bending of the bending part includes: fixing the first panel part; and turning over the second panel part so that the first alignment mark provided in the first panel part and the first alignment mark provided in the second panel part Two alignment marks are aligned.
  • the second distance is equal to zero.
  • the bending of the bending part includes: fixing the second panel part; and turning over the first panel part so that the first alignment mark provided in the first panel part and the first alignment mark provided in the second panel part Two alignment marks are aligned.
  • the first distance and the second distance are both greater than zero.
  • the method further includes: adhering a heat dissipation film to a side of the first film portion facing away from the first panel portion.
  • the heat dissipation film covers the entire first film portion.
  • At least one of the first distance and the second distance is in a range greater than 0 and less than or equal to 200 ⁇ m.
  • FIG. 1A shows a cross-sectional view of a display device according to an embodiment of the present disclosure
  • FIG. 1B shows a bottom view of the display device in FIG. 1A before the bent portion is bent
  • FIG. 2 shows a partial view of the display unit of the first panel part in FIG. 1A;
  • FIG. 3 shows a cross-sectional view of a display device according to another embodiment of the present disclosure
  • Figure 4 shows a cross-sectional view of a display device according to another embodiment of the present disclosure
  • FIG. 5 shows a flowchart of a manufacturing method of a display device according to an embodiment of the present disclosure
  • 6A-6C show steps of a method of manufacturing a display device according to an embodiment of the present disclosure
  • FIG. 7 shows a flowchart of a manufacturing method of a display device according to another embodiment of the present disclosure.
  • FIGS. 8A-8C show steps of a manufacturing method of a display device according to another embodiment of the present disclosure.
  • FIG. 9 shows a cross-sectional view of a display device according to another embodiment of the present disclosure.
  • Fig. 10 shows a cross-sectional view of a display device.
  • FIG. 10 shows a display device 10.
  • the display device 10 includes a flexible panel 10 and a protective film 20.
  • the flexible panel 10 includes a first panel part 11, a second panel part 12 and a bent part 13 connected between the first panel part 11 and the second panel part 12.
  • the flexible panel 10 includes a display side surface and a non-display side surface, and the display side surface serves as a screen portion that performs a display function.
  • the protective film 20 is adhered to the non-display side surface of the flexible panel 10, and includes a first film portion 21 substantially adhered to the first panel portion 11 and a second film portion substantially adhered to the second panel portion 12 twenty two.
  • the flexible panel 12 is bent at the bent portion 13 so that the first panel portion 11 and the second panel portion 12 overlap each other in a first direction perpendicular to the surface of the flexible panel 10.
  • An opening 23 corresponding to the bent portion 13 is formed between the first film portion 21 and the second film portion 22 to reduce damage to the flexible panel 10 due to the difference in stress between the protective film 20 and the flexible panel 10.
  • a portion 22' of the second film portion 22 Will be bent together with the bent portion 13. This may cause damage (e.g., breakage, etc.) in the section near the section 22' such as the bent portion 13.
  • Some embodiments of the present disclosure provide a display device including a flexible panel and a protective film.
  • the flexible panel includes a first panel part, a second panel part, and a bent part connected between the first panel part and the second panel part.
  • the protective film is adhered to the surface of the non-display side of the flexible panel, and includes a first film portion adhered to the first panel portion and a second film portion adhered to the second panel portion.
  • the flexible panel is bent at the bent portion so that the first panel part and the second panel part overlap each other in a first direction perpendicular to the surface.
  • the first edge of the first film portion close to the second film portion is a first distance from the first boundary between the first panel portion and the bent portion.
  • the second edge of the second film portion close to the first film portion is a second distance from the second boundary between the second panel portion and the bent portion.
  • the sum of the first distance and the second distance is greater than zero. Moreover, neither the first distance nor the second distance is less than zero.
  • the first film portion and the second film portion can be avoided when bending the bent portion It is bent together with the bent part to avoid damage to the bent part and improve the quality and life of the display device.
  • FIG. 1A shows a cross-sectional view of a display device 100 according to an embodiment of the present disclosure.
  • the display device 100 includes a flexible panel 110, a protective film 120 and a heat dissipation film 130.
  • the flexible panel 10 includes a display side surface and a non-display side surface.
  • the display side surface as the part of the screen that performs the display function, can be viewed by the user during use; the non-display side surface has no display function and can be viewed by the user during use.
  • the flexible panel 110 includes a first panel part 111, a second panel part 112, and a bending part 113 connected between the first panel part 111 and the second panel part 112.
  • the flexible panel 110 may be bent at the bent part 113 so that the first panel part 111 and the second panel part 112 overlap each other.
  • FIG. 1B shows a bottom view (viewed from the non-display side) of the display device 100 in FIG. 1A before the bent portion 113 is bent.
  • the protective film 120 is adhered to the surface 114 of the non-display side of the flexible panel 110, and includes a first film portion 121 adhered to the first panel portion 111 and a second panel The second membrane portion 122 of the portion 112.
  • the first panel portion 111 and the second panel portion 112 overlap in a first direction perpendicular to the surface 114.
  • An opening 123 is formed between the first film portion 121 and the second film portion 122.
  • the opening 123 can be formed by cutting.
  • a complete protective film 120 is adhered to the entire surface 114, and then a part of the opening 123 of the complete protective film 120 is cut off to form the first film portion 121 and the second film portion 122.
  • the opening 123 may be a closed opening, so that the first membrane part 121 and the second membrane part 122 can be connected by other membrane parts; or, the opening 123 may be a non-closed opening (see FIG. 1B), so that the first membrane part 121 And the second membrane portion 122 are separated from each other.
  • the protective film 120 is used to support and protect the flexible panel 110.
  • the protective film 120 may be made of materials such as polyethylene terephthalate (PET) and polyimide (PI).
  • PET polyethylene terephthalate
  • PI polyimide
  • the protective film 120 is transparent.
  • the protective film 120 may be adhered to the surface 114 of the flexible panel 110 through an adhesive layer (not shown).
  • the adhesive layer may be formed of OCA glue (Optically Clear Adhesive), for example.
  • the first edge of the first film portion 121 close to the second film portion 122 is a first distance x1 from the first boundary between the first panel portion 111 and the bent portion 113.
  • the second edge of the second film portion 122 close to the first film portion 121 is a second distance x2 from the second boundary between the second panel portion 112 and the bent portion 113.
  • the sum of the first distance x1 and the second distance x2 is greater than zero, and both the first distance x1 and the second distance x2 are not less than zero.
  • the first panel portion 111 is straight at least near the first boundary, that is, its curvature is zero
  • the bent portion 113 is curved at least near the first boundary, that is, its curvature is not zero.
  • the second panel portion 112 is straight at least near the second boundary, that is, its curvature is zero, and the bent portion 113 is curved at least near the second boundary, that is, its curvature is not zero.
  • the first distance x1 is equal to zero, and the second distance x2 is greater than zero.
  • the bent part 113 When bending the bent part 113, the first panel part 111 and the first film part 121 adhered to it can be fixed first, and then the bent part 113 is bent so that the first panel part 111 and the second panel part 112 Overlap in the first direction. Since the second distance is designed to be greater than 0, it is possible to prevent the second film portion 122 adhered to the second panel portion 112 from being bent together with the bending portion 113.
  • the flexible panel 110 further includes a first alignment mark 161 provided in the first panel portion 111 and a second alignment mark provided in the second panel portion 112 162.
  • first alignment mark 161 and the second alignment mark 162 are aligned.
  • the first alignment mark 161 and the second alignment mark 162 are positioned such that when the distance between the first panel portion 111 and the second panel portion 112 in the first direction is determined, when the first alignment mark 161 and the second When the two alignment marks 162 are aligned, the second distance x2 is realized.
  • the shapes of the first alignment mark 161 and the second alignment mark 162 may be the same or complementary.
  • the shape of the first alignment mark 161 and the second alignment mark 162 may be the same cross-shaped pattern; alternatively, the first alignment mark 161 has a cross-shaped pattern, and the second alignment mark 162 has the same cross-shaped pattern. Opening.
  • the first alignment mark 161 and the second alignment mark 162 are arranged to be visible from the non-display side of the flexible panel 110, for example, on the surface 114 of the non-display side of the flexible panel, thereby allowing alignment of the first alignment A mark 161 and a second alignment mark 162.
  • the opening 123 between the first film portion 121 and the second film portion 122 may be formed by cutting.
  • one of the first panel part 111 and the second panel part 112 may be fixed while the other is turned over, while the first alignment mark 161 and the second alignment mark 162 are aligned.
  • the width of the opening 123 (that is, the distance between the first film portion 121 and the second film portion 123 in the second direction perpendicular to the first direction and the first boundary) is subject to cutting tolerances. Affected, the relative position between the first panel portion 111 and the second panel portion 112 in the second direction is affected by the alignment tolerance between the first alignment mark 161 and the second alignment mark 162.
  • the sum of the distances of the first distance x1 and the second distance x2 is set to be greater than zero, wherein both the first distance x1 and the second distance x2 are not less than 0 to prevent the protective film 120 from being bent together with the bending portion 113 .
  • At least one of the first distance x1 and the second distance x2 may be determined based on the cutting tolerance, alignment tolerance, and the like.
  • the second distance x2 is equal to the maximum deviation between the alignment of the first alignment mark 161 and the second alignment mark 162 The sum of the absolute value of and the absolute value of the maximum manufacturing deviation of the width of the opening 123 between the first film portion 121 and the second film portion 122.
  • the second distance x2 can also be designed to be greater than the absolute value of the maximum deviation of the alignment between the first alignment mark 161 and the second alignment mark 162 and the opening 123 between the first film portion 121 and the second film portion 122 The sum of the absolute value of the maximum manufacturing deviation of the width.
  • the second distance may be greater than 0 and less than or equal to 500 ⁇ m, or greater than 0 and less than or equal to 300 ⁇ m, or greater than 0 and less than or equal to 100 ⁇ m, or greater than 100 ⁇ m and less than or equal to 200 ⁇ m.
  • the first distance x1 may be equal to zero.
  • the second distance x2 may also be considered to determine the second distance x2, for example, the positioning tolerance of the first membrane portion 121, that is, the distance between the first edge of the first membrane portion 121 and the first boundary Tolerance of distance x1.
  • first edge of the first film portion 121 and the first boundary may be at a non-zero angle, that is, the first edge may be arranged obliquely to the first boundary.
  • first edge of the first film portion 121 may have an irregular shape, such as a sawtooth shape.
  • first distance x1 refers to the minimum distance between the first edge of the first film portion 121 and the first boundary.
  • second distance x2 refers to the minimum distance from the second edge of the second film portion 122 to the second boundary.
  • the heat dissipation film 130 may be disposed between the first film part 121 and the second film part 122.
  • the heat dissipation film 130 substantially covers the entire first film portion 121 for dissipating the heat generated by the first panel portion 111.
  • the heat dissipation film 130 may be adhered only to the first film part 121 or may be adhered to both the first film part 121 and the second film part 122.
  • the heat dissipation film 130 may be a graphite heat dissipation film, a nanocarbon heat dissipation film, or the like.
  • the heat dissipation film 130 is a composite material including foam, copper foil, graphite, and EMBO glue.
  • the heat dissipation film 130 may block the first alignment mark 161 and the second alignment mark 162. Therefore, the heat dissipation film substantially covers the entire first film portion 121, but the heat dissipation film 130 is designed to be misaligned with the first alignment mark 161 and the second alignment mark 162. To prevent the first alignment mark 161 and the second alignment mark 162 from being blocked by the heat dissipation film 130.
  • first film portion 121 and the second film portion 122 may be in contact with each other without the heat dissipation film 130, as shown in FIG. 9.
  • specific components may be provided between the first film portion 121 and the second film portion 122 as required. The distance between the first panel portion 111 and the second panel portion 112 in the first direction can be determined according to the thickness of these components.
  • the first panel part 111 includes a display area on the display side surface, the display area including a display unit.
  • the display unit includes a plurality of pixels arranged in an array. A plurality of pixels emit light toward the display side of the flexible panel 110 opposite to the non-display side in the display area to display an image.
  • FIG. 2 shows a partial view of the display unit of the first panel part 111 in FIG. 1A.
  • each pixel includes a light-emitting element and a pixel circuit.
  • the pixel circuit includes, for example, a thin film transistor (TFT), and the light-emitting element includes, for example, an organic light emitting diode (OLED).
  • TFT thin film transistor
  • OLED organic light emitting diode
  • the embodiment of the present disclosure does not limit the type of the display unit.
  • the OLED display unit it may also be a quantum dot light emitting diode (QLED) display unit.
  • QLED quantum dot light emitting diode
  • the first panel part 111 includes a substrate 410, a light shielding part 420, a thin film transistor, an organic light emitting diode, and an encapsulation layer 480.
  • the thin film transistor includes an active layer 441, a gate 443, and a source and drain 444.
  • the organic light emitting diode includes a first driving electrode 461, a second driving electrode 463, and a light emitting layer 462 between the first driving electrode 461 and the second driving electrode 463.
  • a plurality of insulating layers are provided between the respective electrode layers.
  • the plurality of insulating layers may include a buffer layer 430, a gate insulating layer 442, an intermediate dielectric layer 445, a planarization layer 450, a pixel defining layer 470, and the like.
  • the flexible panel 110 of the display device is an OLED display panel.
  • the flexible panel 110 may also be a light emitting diode (LED) display panel, a quantum dot light emitting diode (QLED) display panel, or the like.
  • the first panel portion 111 may have other configurations, and the embodiments of the present disclosure are not limited thereto.
  • the first panel part 111 may also include a capacitor, a touch electrode layer, a polarizer, and the like.
  • the display device further includes a flexible printed circuit board 140 and a circuit element 150 (for example, an integrated circuit element).
  • the flexible printed circuit board 1450 is connected or bonded to the second panel portion 112 by, for example, an anisotropic conductive film (ACF).
  • ACF anisotropic conductive film
  • the circuit element 150 is electrically and mechanically connected to the second panel portion 112 through the flexible printed circuit board 140.
  • the circuit element 150 may be an integrated circuit chip, for example, an integrated circuit chip used to implement a display function or a touch function, and the integrated circuit chip may also be mounted on the flexible printed circuit board 1450 in a suitable packaging form.
  • FIG. 3 shows a cross-sectional view of a display device 200 according to another embodiment of the present disclosure.
  • the display device 200 includes a flexible panel 210, a protective film 220, a heat dissipation film 230, a flexible printed circuit board 240 and circuit elements 250.
  • the flexible panel 210 includes a first panel part 211, a second panel part 212, and a bending part 213 connected between the first panel part 211 and the second panel part 212.
  • the flexible panel 210 is bent at the bent part 213 so that the first panel part 211 and the second panel part 212 overlap each other.
  • the flexible panel 210 also includes a first alignment mark 261 provided in the first panel part 211 and a second alignment mark 262 provided in the second panel part 212. When the bent portion 213 is bent, the first alignment mark 261 and the second alignment mark 262 are aligned in the direction in which the first panel portion 211 and the second panel portion 212 overlap each other.
  • the protective film 220 is adhered to the surface 214 on the non-display side of the flexible panel 210 and includes a first film portion 221 adhered to the first panel portion 211 and a second film portion 222 adhered to the second panel portion 212.
  • An opening 223 is formed between the first film portion 221 and the second film portion 222.
  • the first edge of the first film portion 221 close to the second film portion 222 is a first distance x1 from the first boundary between the first panel portion 211 and the bent portion 213.
  • the second edge of the second film portion 222 close to the first film portion 221 is a second distance x2 from the second boundary between the second panel portion 212 and the bent portion 213.
  • the sum of the first distance x1 and the second distance x2 is greater than zero, and both the first distance x1 and the second distance x2 are not less than zero.
  • the first panel portion 211 is straight at least near the first boundary, that is, its curvature is zero
  • the bent portion 213 is curved at least near the first boundary, that is, its curvature is not zero.
  • the second panel portion 212 is straight at least near the second boundary, that is, its curvature is zero, and the bent portion 213 is curved at least near the second boundary, that is, its curvature is not zero.
  • the difference from the display device 100 is that, in the display device 200, the second distance x2 is equal to zero, and the first distance x1 is greater than zero.
  • the second panel part 212 may be fixed and the first panel part 211 may be bent. Since the first distance x1 is greater than 0, the protective film 220 can be prevented from being bent together with the bent portion 213.
  • the first distance x1 is greater than or equal to the absolute value of the maximum deviation between the first alignment mark 261 and the second alignment mark 262 and The sum of the absolute value of the maximum manufacturing deviation of the width of the opening 223 between the first film portion 221 and the second film portion 222.
  • the first distance x1 may be greater than 0 and less than or equal to 500 ⁇ m, or greater than 0 and less than or equal to 300 ⁇ m, or greater than 0 and less than or equal to 100 ⁇ m, or greater than 100 ⁇ m and less than or equal to 200 ⁇ m.
  • the second distance x2 is equal to zero.
  • FIG. 4 shows a cross-sectional view of a display device 300 according to another embodiment of the present disclosure.
  • the display device 300 includes a flexible panel 310, a protective film 320, a heat dissipation film 330, a flexible printed circuit board 340, and circuit elements 350.
  • the flexible panel 310 includes a first panel part 311, a second panel part 312, and a bending part 313 connected between the first panel part 311 and the second panel part 312.
  • the flexible panel 310 is bent at the bent part 313 so that the first panel part 311 and the second panel part 312 overlap each other.
  • the flexible panel 310 also includes a first alignment mark 361 provided in the first panel part 311 and a second alignment mark 362 provided in the second panel part 312. When the bent portion 313 is bent, the first alignment mark 361 and the second alignment mark 362 are aligned.
  • the protective film 320 is adhered to the surface 314 on the non-display side of the flexible panel 310 and includes a first film portion 321 adhered to the first panel portion 311 and a second film portion 322 adhered to the second panel portion 312. An opening 323 is formed between the first film portion 321 and the second film portion 322.
  • the first edge of the first film portion 321 close to the second film portion 322 is a first distance x1 from the first boundary between the first panel portion 311 and the bent portion 313.
  • the second edge of the second film portion 322 close to the first film portion 321 is a second distance x2 from the second boundary between the second panel portion 312 and the bent portion 313.
  • the sum of the first distance x1 and the second distance x2 is greater than zero, and both the first distance x1 and the second distance x2 are not less than zero.
  • the first panel portion 311 is straight at least near the first boundary, that is, its curvature is zero
  • the bent portion 313 is curved at least near the first boundary, that is, its curvature is not zero.
  • the second panel portion 312 is straight at least near the second boundary, that is, its curvature is zero
  • the bent portion 313 is curved at least near the second boundary, that is, its curvature is not zero.
  • both the first distance x1 and the second distance x2 are greater than zero.
  • one of the first panel part 311 and the second panel part 212 may be fixed and the other may be bent. Since the first distance x1 and the second distance x2 are both greater than 0, it is possible to prevent the protective film 320 from being bent together with the bent portion 313.
  • the second distance x2 may be greater than 0 and less than or equal to 500 ⁇ m, or greater than 0 and less than or equal to 300 ⁇ m, or greater than 0 and less than or equal to 100 ⁇ m, Or greater than 100 ⁇ m and less than or equal to 200 ⁇ m.
  • the first distance x1 may be greater than 0 and less than or equal to 500 ⁇ m, or greater than 0 and less than or equal to 300 ⁇ m, or greater than 0 and less than or equal to 100 ⁇ m, Or greater than 100 ⁇ m and less than or equal to 200 ⁇ m.
  • the first distance x1 and the second distance x2 may both be greater than 0 and less than or equal to 500 ⁇ m, or greater than 0 and less than or equal to 300 ⁇ m, or greater than 0 and less than or equal to 100 ⁇ m, or greater than 100 ⁇ m and less than or equal to 200 ⁇ m.
  • Some embodiments of the present disclosure also provide a manufacturing method of a display device.
  • FIG. 5 shows a flowchart of a manufacturing method of a display device according to an embodiment of the present disclosure.
  • 6A-6C show steps of a method of manufacturing a display device according to an embodiment of the present disclosure.
  • the manufacturing method of the display device can be used to manufacture the above-mentioned display devices 100 and 300.
  • the following takes the display device 100 as an example to describe the manufacturing method of the display device according to this embodiment.
  • the manufacturing method of the display device 100 includes steps S110-S160.
  • a flexible panel 110 is provided.
  • the flexible panel 110 includes a display side and a non-display side, and includes a first panel portion 111, a second panel portion 112, and connected to the first panel portion 111 and the second panel portion 112.
  • the bent portion 113 to be bent between.
  • step S120 a complete protective film 120 is adhered to the surface 114 of the non-display side of the flexible panel 110, as shown in FIG. 6A.
  • step S130 a part of the protective film 120 is removed to form a first film portion 121 adhered to the first panel portion 111 and a second film portion 122 adhered to the second panel portion 112, as shown in FIG. 6B .
  • a part of the protective film 120 may be removed by cutting the protective film 120.
  • step S120 and step S130 the protective film 120 including the first film portion 121, the second film portion 122, and the opening 123 between the first film portion 121 and the second film portion 122 is directly provided, and will protect The film 120 is adhered to the flexible panel 110.
  • the protective film 120 adhered to the flexible panel 110 has been cut to form the opening 123 before being adhered.
  • step S140 the heat dissipation film 130 is attached to the side of the first film portion 121 facing away from the first panel portion 111, as shown in FIG. 6C.
  • step S150 the first panel portion 111 is fixed so that the first edge of the first film portion 121 close to the second film portion 122 is a first distance x1 from the first boundary between the first panel portion 111 and the bent portion 113 .
  • the first distance x1 is equal to zero.
  • step S160 with the first panel portion 111 fixed, the second panel portion 112 is turned over in the direction indicated by the arrow in FIG. 6C and the bent portion 113 is bent so as to be disposed in the first panel portion 111
  • the first alignment mark 161 and the second alignment mark 162 provided in the second panel portion 112 are aligned, and the first panel portion 111 and the second panel portion 112 are in a first direction perpendicular to the surface 114 with each other overlap.
  • step 160 after bending the bending portion 113, the second edge of the second film portion 122 close to the first film portion 121 is designed to be away from the second boundary between the second panel portion 112 and the bending portion 113
  • the second distance x2, the second distance x2 is greater than zero.
  • the second film portion 122 of the protective film 120 can be prevented from being bent together with the bending portion 113.
  • FIG. 7 shows a flowchart of a manufacturing method of a display device according to an embodiment of the present disclosure.
  • 8A-8C show steps of a method of manufacturing a display device according to an embodiment of the present disclosure.
  • the manufacturing method of the display device can be used to manufacture the above-mentioned display devices 200 and 300. Taking the display device 200 as an example, the manufacturing method of the display device according to this embodiment will be described.
  • the manufacturing method of the display device 200 includes steps S210-S260.
  • a flexible panel 210 is provided.
  • the flexible panel 210 includes a display side and a non-display side, and includes a first panel part 211, a second panel part 212 and connected to the first panel part 211 and the second panel part 212.
  • step S220 a complete protective film 220 is adhered to the surface 214 of the non-display side of the flexible panel 210, as shown in FIG. 6A.
  • step S230 a part of the protective film 220 is removed to form a first film portion 221 adhered to the first panel portion 211 and a second film portion 222 adhered to the second panel portion 212, as shown in FIG. 6B .
  • a part of the protective film 220 may be removed by cutting the protective film 220.
  • step S220 and step S230 the protective film 220 including the first film portion 221, the second film portion 222, and the opening 223 between the first film portion 221 and the second film portion 222 is directly provided, and will protect The film 220 is adhered to the flexible panel 210.
  • the protective film 220 adhered to the flexible panel 210 has been cut to form an opening 223 before being adhered.
  • step S240 the heat dissipation film 230 is attached to the side of the first film portion 221 facing away from the first panel portion 211, as shown in FIG. 6C.
  • step S250 the second panel portion 212 is fixed so that the second edge of the second film portion 222 close to the first film portion 221 is a second distance x2 from the second boundary between the second panel portion 212 and the bent portion 213 .
  • the second distance x2 is equal to zero.
  • step S260 the first panel part 211 is turned over in the direction indicated by the arrow in FIG. 8C and the bending part 213 is bent, so that the first alignment mark 261 provided in the first panel part 211 and the second The second alignment mark 262 in the panel part 212 is aligned, and the first panel part 211 and the second panel part 212 overlap each other in a first direction perpendicular to the surface 214.
  • step 160 after bending the bending portion 213, the first edge of the first film portion 221 close to the second film portion 222 is designed to be away from the first boundary between the first panel portion 211 and the bending portion 213
  • the first distance x1, the second distance x1 is greater than zero.
  • the first distance x1 is greater than 0, it is possible to prevent the first film portion 221 of the protective film 220 from being bent together with the bending portion 213.

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Abstract

显示装置(100)及其制造方法，显示装置(100)包括柔性面板(110)和保护膜(120)。柔性面板(110)包括第一面板部分(111)、第二面板部分(112)、连接在第一面板部分(111)和第二面板部分(112)之间的弯折部分(113)。保护膜(120)粘附到柔性面板(110)的非显示侧的表面(114)上，并且包括粘附到第一面板部分(111)的第一膜部分(121)和粘附到第二面板部分(112)的第二膜部分(122)。柔性面板(110)在弯折部分(113)处被弯折使得第一面板部分(111)和第二面板部分(112)彼此在垂直于表面(114)的第一方向上交叠。第一膜部分(121)的靠近第二膜部分(122)的第一边缘距第一面板部分(111)与弯折部分(113)之间的第一边界第一距离(x1)，第二膜部分(122)的靠近第一膜部分(121)的第二边缘距第二面板部分(112)与弯折部分(113)之间的第二边界第二距离(x2)，第一距离(x1)和第二距离(x2)的和大于0，并且第一距离(x1)和第二距离(x2)均不小于0。

Description

显示装置和显示装置的制造方法 技术领域
本公开的实施例涉及显示装置和显示装置的制造方法。
背景技术
人们已经开发了具有弯曲区域的柔性面板的显示装置。例如，为了实现显示装置的窄边框设计，可以将柔性面板的连接有外部电路的一端向面板的背侧进行弯折(或，翻转)。
发明内容
本公开的至少一实施例提供一种显示装置，包括柔性面板和保护膜。所述柔性面板包括第一面板部分、第二面板部分、连接在所述第一面板部分和所述第二面板部分之间的弯折部分。所述保护膜粘附到所述柔性面板的非显示侧的表面上，并且包括粘附到所述第一面板部分的第一膜部分和粘附到所述第二面板部分的第二膜部分。所述柔性面板在所述弯折部分处被弯折使得所述第一面板部分和所述第二面板部分彼此在垂直于所述表面的第一方向上交叠。所述第一膜部分的靠近所述第二膜部分的第一边缘距所述第一面板部分与所述弯折部分之间的第一边界为第一距离，所述第二膜部分的靠近所述第一膜部分的第二边缘距所述第二面板部分与所述弯折部分之间的第二边界为第二距离，所述第一距离和所述第二距离的和大于0，并且所述第一距离和所述第二距离均不小于0。
例如，在一些实施例中，所述第一距离等于0。
例如，在一些实施例中，所述第二距离等于0。
例如，在一些实施例中，所述第一距离和所述第二距离均大于0。
例如，在一些实施例中，所述柔性面板还包括设置在第一面板部分中的第一对准标记和设置在第二面板部分中的第二对准标记，所述第一对准标记和所述第二对准标记用于在弯折所述弯折部分时用于对准。
例如，在一些实施例中，所述第一距离和所述第二距离中的至少一个大 于或等于对准所述第一对准标记和所述第二对准标记的最大偏差的绝对值与所述第一膜部分和所述第二膜部分之间的开口的宽度的最大制造偏差的绝对值的和。
例如，在一些实施例中，所述第一距离和所述第二距离中的至少一个在大于0且小于等于200μm的范围内。
例如，在一些实施例中，所述显示装置还包括散热膜。在所述第一方向上，所述散热膜在所述第一膜部分和所述第二膜部分之间，并且所述散热膜覆盖整个所述第一膜部分。
例如，在一些实施例中，所述柔性面板在所述弯折部分处被弯折使得所述第二膜部分接触所述第一膜部分。
例如，在一些实施例中，所述第一面板部分包括显示单元，所述显示单元包括多个像素，每个像素包括发光元件和像素电路。
例如，在一些实施例中，所述显示装置还包括：柔性印刷电路板。所述柔性印刷电路板连接到第二面板部分。
本公开的至少一实施例还提供一种显示装置的制造方法，包括：将保护膜粘附到柔性面板的非显示侧表面上，所述柔性面板包括第一面板部分、第二面板部分和连接在所述第一面板部分和所述第二面板部分之间的弯折部分；移除所述保护膜的一部分，以形成粘附到所述第一面板部分的第一膜部分和粘附到所述第二面板部分的第二膜部分；以及弯折所述弯折部分，使得所述第一面板部分和所述第二面板部分彼此在垂直于所述非显示侧表表面的第一方向上交叠。所述第一膜部分的靠近所述第二膜部分的第一边缘距所述第一面板部分与所述弯折部分之间的第一边界为第一距离，并且所述第二膜部分的靠近所述第一膜部分的第二边缘距所述第二面板部分与所述弯折部分之间的第二边界为第二距离，所述第一距离和所述第二距离的和大于0，并且所述第一距离和所述第二距离均不小于0。
例如，在一些实施例中，弯折所述弯折部分包括：固定所述第一面板部分和所述第二面板部分中的一个；以及翻转所述第一面板部分和所述第二面板部分中的另一个，使得设置在第一面板部分中的第一对准标记和设置在第二面板部分中的第二对准标记被对准。
例如，在一些实施例中，所述第一距离等于0。弯折所述弯折部分包括： 固定所述第一面板部分；以及翻转所述第二面板部分，使得设置在第一面板部分中的第一对准标记和设置在第二面板部分中的第二对准标记被对准。
例如，在一些实施例中，所述第二距离等于0。弯折所述弯折部分包括：固定所述第二面板部分；以及翻转所述第一面板部分，使得设置在第一面板部分中的第一对准标记和设置在第二面板部分中的第二对准标记被对准。
例如，在一些实施例中，所述第一距离和所述第二距离均大于0。
例如，在一些实施例中，所述方法还包括：将散热膜粘附到所述第一膜部分的背离所述第一面板部分的一侧。所述散热膜覆盖整个所述第一膜部分。
例如，在一些实施例中，所述第一距离和所述第二距离中的至少一个在大于0且小于等于200μm的范围内。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本公开的某些实施例，因此不应被看作是对保护范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1A示出了根据本公开实施例的显示装置的剖视图；
图1B示出了在弯折部分被弯折之前，图1A中的显示装置的仰视图；
图2示出了图1A中的第一面板部分的显示单元的局部视图；
图3示出了根据本公开另一实施例的显示装置的剖视图；
图4示出了根据本公开另一实施例的显示装置的剖视图；
图5示出了根据本公开实施例的显示装置的制造方法的流程图；
图6A-图6C示出了根据本公开实施例的显示装置的制造方法的步骤；
图7示出了根据本公开另一实施例的显示装置的制造方法的流程图；
图8A-图8C示出了根据本公开另一实施例的显示装置的制造方法的步骤；
图9示出了根据本公开另一实施例的显示装置的剖视图；
图10示出了一种显示装置的剖视图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“上”、“下”、“左”、“右”等仅用于表示相对准置关系，当被描述对象的绝对准置改变后，则该相对准置关系也可能相应地改变。
图10示出了一种显示装置10。该显示装置10包括柔性面板10和保护膜20。柔性面板10包括第一面板部分11、第二面板部分12和连接在第一面板部分11和第二面板部分12之间的弯折部分13。柔性面板10包括显示侧表面和非显示侧表面，显示侧表面作为执行显示功能的屏幕部分。保护膜20粘附到柔性面板10的非显示侧表面上，并且包括基本上粘附到第一面板部分11的第一膜部分21和基本上粘附到第二面板部分12的第二膜部分22。柔性面板12在弯折部分13处被弯折使得第一面板部分11和第二面板部分12彼此在垂直于柔性面板10的该表面的第一方向上交叠。第一膜部分21和第二膜部分22之间形成有对应于弯折部分13的开口23，以降低由于保护膜20和柔性面板10之间的应力差异导致的对柔性面板10的损坏。
然而，如图10所示，例如，由于在裁切开口23时产生的裁切公差和在弯折弯折部分13时产生的对准公差等，第二膜部分22的一部段22’将与弯折部分13一起被弯折。这可能导致在例如弯折部分13的在部段22’附近的部段的损坏(例如，断裂等)。
本公开的一些实施例提供了一种显示装置，该显示装置包括柔性面板和保护膜。柔性面板包括第一面板部分、第二面板部分和连接在该第一面板部分和该第二面板部分之间的弯折部分。保护膜粘附到柔性面板的非显示侧的 表面上，并且包括粘附到第一面板部分的第一膜部分和粘附到第二面板部分的第二膜部分。柔性面板在弯折部分处被弯折使得第一面板部分和第二面板部分彼此在垂直于该表面的第一方向上交叠。第一膜部分的靠近第二膜部分的第一边缘距第一面板部分与弯折部分之间的第一边界为第一距离。第二膜部分的靠近第一膜部分的第二边缘距第二面板部分与弯折部分之间的第二边界为第二距离。该第一距离和该第二距离的和大于0。并且，所述第一距离和所述第二距离均不小于0。
由于将该第一距离与该第二距离的和大于0，并且第一距离和第二距离均不小于0，因此，在弯折弯折部分时，可以避免第一膜部分和第二膜部分与弯折部分一起被弯折，从而避免弯折部分的损坏的发生，提高显示装置的质量和寿命。
图1A示出了根据本公开实施例的显示装置100的剖视图。如图1A所示，该显示装置100包括柔性面板110、保护膜120和散热膜130。柔性面板10包括显示侧表面和非显示侧表面。显示侧表面作为执行显示功能的屏幕部分，在使用过程中可被用户观看到；非显示侧表面不具有显示功能，在使用过程中可被用户观看到。
柔性面板110包括第一面板部分111、第二面板部分112和连接在该第一面板部分111和该第二面板部分112之间的弯折部分113。柔性面板110在弯折部分113处可以被弯折使得第一面板部分111和第二面板部分112彼此交叠。
图1B示出了在弯折部分113被弯折之前，图1A中的显示装置100的仰视图(从非显示侧看)。如图1A和图1B所示，保护膜120粘附到柔性面板110的非显示侧的表面114上，并且包括粘附到第一面板部分111的第一膜部分121和粘附到第二面板部分112的第二膜部分122。第一面板部分111和第二面板部分112在垂直于该表面114的第一方向上交叠。第一膜部分121和第二膜部分122之间形成开口123。该开口123可以通过裁切形成。例如，将一完整保护膜120粘附到表面114的全部，然后裁切掉该完整的保护膜120的开口123处的部分以形成第一膜部分121和第二膜部分122。开口123可以为封闭式开口，从而第一膜部分121和第二膜部分122可通过其他膜部分相连接；或者，开口123可以为非封闭式开口(参见图1B)，从而第一膜部 分121和第二膜部分122彼此分离。
保护膜120用于支撑和保护柔性面板110。例如，保护膜120可以由聚对苯二甲酸乙二醇酯(PET)、聚酰亚胺(PI)等材料制成。例如，保护膜120是透明的。此外，保护膜120可以通过粘结层(未示出)粘附到柔性面板110的表面114上。粘结层例如可以由OCA胶(固态透明光学胶，Optically Clear Adhesive)形成。
第一膜部分121的靠近第二膜部分122的第一边缘距第一面板部分111与弯折部分113之间的第一边界第一距离x1。第二膜部分122的靠近第一膜部分121的第二边缘距第二面板部分112与弯折部分113之间的第二边界第二距离x2。该第一距离x1和第二距离x2的和大于0，并且该第一距离x1和第二距离x2均不小于0。第一面板部分111至少在第一边界附近是直的，即其曲率为0，弯折部分113至少在第一边界附近是弯曲的，即其曲率不为0。第二面板部分112至少在第二边界附近是直的，即其曲率为0，弯折部分113至少在第二边界附近是弯曲的，即其曲率不为0。
在本实施例中，该第一距离x1等于0，该第二距离x2大于0。在弯折弯折部分113时，可以先固定第一面板部分111和粘附到其上的第一膜部分121，然后弯折弯折部分113以使得第一面板部分111和第二面板部分112在第一方向上交叠。由于第二距离被设计成大于0，因此，可以避免粘附到第二面板部分112的第二膜部分122与弯折部分113一起被弯折。
在本实施例中，为了更准确地执行弯折操作，柔性面板110还包括设置在第一面板部分111中的第一对准标记161和设置在第二面板部分112中的第二对准标记162。在弯折弯折部分113时，对准第一对准标记161和第二对准标记162。第一对准标记161和第二对准标记162被定位成，在第一面板部分111和第二面板部分112在第一方向上的距离确定的情况下，当第一对准标记161和第二对准标记162被对准时，实现第二距离x2。第一对准标记161和第二对准标记162的形状可以是相同的或互补的。例如，第一对准标记161和第二对准标记162的形状可以是相同的十字形图案；或者，第一对准标记161为十字形图案，而第二对准标记162具有相同的十字形的开口。第一对准标记161和第二对准标记162设置为可以从柔性面板110的非显示侧看到，例如，设置在柔性面板的非显示侧的表面114上，从而允许对准第 一对准标记161和第二对准标记162。
如上所述，可以通过裁切形成第一膜部分121和第二膜部分122之间的开口123。在制造显示装置的过程中，可以固定第一面板部分111和第二面板部分112中的一个而翻转另一个，同时将第一对准标记161和第二对准标记162对准。然而，在实际中，开口123的宽度(即，第一膜部分121和第二膜部分123之间、在垂直于第一方向和第一边界的第二方向上的距离)受裁切公差的影响，第一面板部分111和第二面板部分112之间在第二方向上的相对位置受到第一对准标记161和第二对准标记162之间的对准公差的影响。因此，将第一距离x1和第二距离x2的距离和设置为大于零，其中，第一距离x1和第二距离x2均不小于0，以避免保护膜120与弯折部分113一起被弯折。可以基于该裁切公差和对准公差等来确定该第一距离x1和第二距离x2中的至少一个。例如，在本实施例中，在固定第一面板部分111并且翻转第二面板部分112的情况下，该第二距离x2等于对准第一对准标记161和第二对准标记162的最大偏差的绝对值与第一膜部分121和第二膜部分122之间的开口123的宽度的最大制造偏差的绝对值的和。此外，第二距离x2还可以被设计为大于对准第一对准标记161和第二对准标记162的最大偏差的绝对值与第一膜部分121和第二膜部分122之间的开口123的宽度的最大制造偏差的绝对值的和。例如，该第二距离可以大于0且小于等于500μm，或者大于0且小于等于300μm，或者大于0且小于等于100μm，或者大于100μm且小于等于200μm。在本实施例中，第一距离x1可以等于0。
在其他实施例中，还可以考虑其他公差或其他因素来确定第二距离x2，例如，第一膜部分121的定位公差，即，第一膜部分121的第一边缘距第一边界的第一距离x1的公差。
需要说明的是，第一膜部分121的第一边缘与第一边界可能呈一非0的角度，即第一边缘可能倾斜于第一边界布置。或者，第一膜部分121的第一边缘可能为不规则形状，例如锯齿状。在这些情况下，第一距离x1指第一膜部分121的第一边缘距第一边界的最小距离。此外，类似地，第二距离x2指第二膜部分122的第二边缘距第二边界的最小距离。
散热膜130可以设置在第一膜部分121和第二膜部分122之间。例如，散热膜130基本上覆盖整个第一膜部分121，用于散发第一面板部分111产 生的热量。例如，散热膜130可以仅粘附到第一膜部分121或者可以粘附到第一膜部分121和第二膜部分122二者。例如，散热膜130可以为石墨散热膜、纳米碳散热膜等。例如，在本实施例中，散热膜130是包含泡棉、铜箔、石墨、EMBO胶的复合材料。
在存在非透明的散热膜130的情况下，散热膜130可能遮挡第一对准标记161和第二对准标记162。因此，散热膜基本上覆盖整个第一膜部分121，但散热膜130被设计成与第一对准标记161和第二对准标记162彼此错位。以避免第一对准标记161和第二对准标记162被散热膜130遮挡。
在另外的实施例中，第一膜部分121和第二膜部分122可以彼此接触，而不设置散热膜130，如图9所示。此外，在另外的实施例中，可以根据需要，将特定部件设置在第一膜部分121和第二膜部分122之间。可以根据这些部件的厚度，确定第一面板部分111和第二面板部分112在第一方向上的距离。
第一面板部分111包括位于显示侧表面的显示区域，该显示区域包括显示单元。该显示单元包括阵列排列的多个像素。多个像素在显示区域中朝向柔性面板110的与非显示侧相对的显示侧发射光，以显示图像。图2示出了图1A中的第一面板部分111的显示单元的局部视图。如图2所示，每个像素包括发光元件和像素电路，像素电路例如包括薄膜晶体管(TFT)等，发光元件例如包括有机发光二极管(OLED)。本公开的实施例不限制显示单元的类型，例如除了为OLED显示单元之外，还可以为量子点发光二极管(QLED)显示单元等。
如图2所示，第一面板部分111包括基底410、遮光部420、薄膜晶体管、有机发光二极管和包封层480。薄膜晶体管包括有源层441、栅极443、源漏极444。有机发光二极管包括第一驱动电极461、第二驱动电极463以及在第一驱动电极461和第二驱动电极463之间的发光层462。多个绝缘层设置在各个电极层之间。多个绝缘层可以包括缓冲层430、栅极绝缘层442、中间介电层445、平坦化层450和像素界定层470等。
根据本实施例的显示装置的柔性面板110是OLED显示面板。如上所述，在其他实施例中，该柔性面板110还可以为发光二极管(LED)显示面板、量子点发光二极管(QLED)显示面板等。在其他实施例中，第一面板部分 111可以具有其他的构造，本公开的实施例不限于此。例如，第一面板部分111还可以包括电容、触控电极层、偏光片等。
此外，如图1A和图1B所示，显示装置还包括柔性印刷电路板140和电路元件150(例如，集成电路元件)。柔性印刷电路板1450例如通过各向异性导电膜(ACF)连接或邦定(bonding)到第二面板部分112。电路元件150通过柔性印刷电路板140电连接和机械连接到第二面板部分112。电路元件150可以为集成电路芯片，例如用于实现显示功能或触控功能的集成电路芯片，该集成电路芯片也可以通过适当的封装形式安装在柔性印刷电路板1450上。
图3示出了根据本公开另一实施例的显示装置200的剖视图。
如图3所示，该显示装置200包括柔性面板210、保护膜220、散热膜230、柔性印刷电路板240和电路元件250。
柔性面板210包括第一面板部分211、第二面板部分212和连接在该第一面板部分211和该第二面板部分212之间的弯折部分213。柔性面板210在弯折部分213处被弯折使得第一面板部分211和第二面板部分212彼此交叠。柔性面板210还包括设置在第一面板部分211中的第一对准标记261和设置在第二面板部分212中的第二对准标记262。在弯折弯折部分213时，在第一面板部分211和第二面板部分212彼此交叠的方向上对准第一对准标记261和第二对准标记262。
保护膜220粘附到柔性面板210的非显示侧的表面214上，并且包括粘附到第一面板部分211的第一膜部分221和粘附到第二面板部分212的第二膜部分222。第一膜部分221和第二膜部分222之间形成开口223。
第一膜部分221的靠近第二膜部分222的第一边缘距第一面板部分211与弯折部分213之间的第一边界第一距离x1。第二膜部分222的靠近第一膜部分221的第二边缘距第二面板部分212与弯折部分213之间的第二边界第二距离x2。该第一距离x1和第二距离x2的和大于0，并且该第一距离x1和第二距离x2均不小于0。第一面板部分211至少在第一边界附近是直的，即其曲率为0，弯折部分213至少在第一边界附近是弯曲的，即其曲率不为0。第二面板部分212至少在第二边界附近是直的，即其曲率为0，弯折部分213至少在第二边界附近是弯曲的，即其曲率不为0。
与显示装置100的不同之处在于，在显示装置200中，第二距离x2等于0，第一距离x1大于0。
例如，在制造显示装置200时，可以固定第二面板部分212而弯折第一面板部分211。由于第一距离x1大于0，所以可以避免保护膜220与弯折部分213一起被弯折。
例如，在固定第二面板部分211并且翻转第一面板部分212的情况下，该第一距离x1大于或等于对准第一对准标记261和第二对准标记262的最大偏差的绝对值与第一膜部分221和第二膜部分222之间的开口223的宽度的最大制造偏差的绝对值的和。
例如，该第一距离x1可以大于0且小于等于500μm，或者大于0且小于等于300μm，或者大于0且小于等于100μm，或者大于100μm且小于等于200μm。在本实施例中，第二距离x2等于0。
图4示出了根据本公开另一实施例的显示装置300的剖视图。
如图4所示，该显示装置300包括柔性面板310、保护膜320、散热膜330、柔性印刷电路板340和电路元件350。
柔性面板310包括第一面板部分311、第二面板部分312和连接在该第一面板部分311和该第二面板部分312之间的弯折部分313。柔性面板310在弯折部分313处被弯折使得第一面板部分311和第二面板部分312彼此交叠。柔性面板310还包括设置在第一面板部分311中的第一对准标记361和设置在第二面板部分312中的第二对准标记362。在弯折弯折部分313时，对准第一对准标记361和第二对准标记362。
保护膜320粘附到柔性面板310的非显示侧的表面314上，并且包括粘附到第一面板部分311的第一膜部分321和粘附到第二面板部分312的第二膜部分322。第一膜部分321和第二膜部分322之间形成开口323。
第一膜部分321的靠近第二膜部分322的第一边缘距第一面板部分311与弯折部分313之间的第一边界第一距离x1。第二膜部分322的靠近第一膜部分321的第二边缘距第二面板部分312与弯折部分313之间的第二边界第二距离x2。该第一距离x1和第二距离x2的和大于0，并且该第一距离x1和第二距离x2均不小于0。第一面板部分311至少在第一边界附近是直的，即其曲率为0，弯折部分313至少在第一边界附近是弯曲的，即其曲率不为0。 第二面板部分312至少在第二边界附近是直的，即其曲率为0，弯折部分313至少在第二边界附近是弯曲的，即其曲率不为0。
与显示装置100的不同之处在于，在显示装置300中，第一距离x1和第二距离x2二者均大于0。
例如，在制造显示装置300时，可以固定第一面板部分311和第二面板部分212中的一个而弯折另一个。由于第一距离x1和第二距离x2均大于0，所以可以避免保护膜320与弯折部分313一起被弯折。
例如，该在固定第一面板部分311并且翻转第二面板部分312的情况下，该第二距离x2可以大于0且小于等于500μm，或者大于0且小于等于300μm，或者大于0且小于等于100μm，或者大于100μm且小于等于200μm。例如，该在固定第二面板部分312并且翻转第一面板部分311的情况下，该第一距离x1可以大于0且小于等于500μm，或者大于0且小于等于300μm，或者大于0且小于等于100μm，或者大于100μm且小于等于200μm。或者，例如，该第一距离x1和第二距离x2可以均大于0且小于等于500μm，或者大于0且小于等于300μm，或者大于0且小于等于100μm，或者大于100μm且小于等于200μm。
本公开的一些实施例还提供一种显示装置的制造方法。
图5示出了根据本公开实施例的显示装置的制造方法的流程图。图6A-图6C示出了根据本公开实施例的显示装置的制造方法的步骤。例如，该显示装置的制造方法可以用于制造上述显示装置100和300。下面以显示装置100为例，说明根据该实施例的显示装置的制造方法。
如图5-图6C所示，显示装置100的制造方法包括步骤S110-S160。
在步骤S110中，提供一柔性面板110，该柔性面板110包括显示侧和非显示侧，并且包括第一面板部分111、第二面板部分112和连接在第一面板部分111和第二面板部分112之间的将被弯折的弯折部分113。
在步骤S120中，将一完整的保护膜120粘附到柔性面板110的非显示侧的表面114，如图6A所示。
在步骤S130中，移除保护膜120的一部分，以形成粘附到第一面板部分111的第一膜部分121和粘附到第二面板部分112的第二膜部分122，如图6B所示。例如，可以通过裁切保护膜120而移除保护膜120的一部分。
替代地，在步骤S120和步骤S130中，直接提供包括第一膜部分121、第二膜部分122和第一膜部分121与第二膜部分122之间的开口123的保护膜120，并将保护膜120粘附到柔性面板110。粘附到柔性面板110的保护膜120在被粘附之前已经被裁切以形成开口123。
在步骤S140中，将散热膜130附接到第一膜部分121的背离第一面板部分111的一侧，如图6C所示。
在步骤S150中，固定第一面板部分111，使得第一膜部分121的靠近第二膜部分122的第一边缘距第一面板部分111与弯折部分113之间的第一边界第一距离x1。例如，第一距离x1等于0。
在步骤S160中，在固定第一面板部分111的情况下，在图6C中的箭头所示的方向上翻转第二面板部分112并且弯折弯折部分113，使得设置在第一面板部分111中的第一对准标记161和设置在第二面板部分112中的第二对准标记162被对准，并且第一面板部分111和第二面板部分112彼此在垂直于表面114的第一方向上交叠。
在步骤160中，在弯折弯折部分113之后，第二膜部分122的靠近第一膜部分121的第二边缘被设计成距第二面板部分112与弯折部分113之间的第二边界第二距离x2，该第二距离x2大于0。
由于第二距离大于0，所以可以避免保护膜120的第二膜部分122与弯折部分113一起被弯折。
需要说明的是，上述步骤可以并行地或者以其他顺序进行。并且，上述步骤中的一个或多个步骤可以被省略。
图7示出了根据本公开实施例的显示装置的制造方法的流程图。图8A-图8C示出了根据本公开实施例的显示装置的制造方法的步骤。例如，该显示装置的制造方法可以用于制造上述显示装置200和300。以显示装置200为例，说明根据该实施例的显示装置的制造方法。
如图7-图8C所示，显示装置200的制造方法包括步骤S210-S260。
在步骤S210中，提供一柔性面板210，该柔性面板210包括显示侧和非显示侧，并且包括第一面板部分211、第二面板部分212和连接在第一面板部分211和第二面板部分212之间的将被弯折的弯折部分213。
在步骤S220中，将一完整的保护膜220粘附到柔性面板210的非显示 侧的表面214，如图6A所示。
在步骤S230中，移除保护膜220的一部分，以形成粘附到第一面板部分211的第一膜部分221和粘附到第二面板部分212的第二膜部分222，如图6B所示。例如，可以通过裁切保护膜220而移除保护膜220的一部分。
替代地，在步骤S220和步骤S230中，直接提供包括第一膜部分221、第二膜部分222和第一膜部分221与第二膜部分222之间的开口223的保护膜220，并将保护膜220粘附到柔性面板210。粘附到柔性面板210的保护膜220在被粘附之前已经被裁切以形成开口223。
在步骤S240中，将散热膜230附接到第一膜部分221的背离第一面板部分211的一侧，如图6C所示。
在步骤S250中，固定第二面板部分212，使得第二膜部分222的靠近第一膜部分221的第二边缘距第二面板部分212与弯折部分213之间的第二边界第二距离x2。例如，第二距离x2等于0。
在步骤S260中，在图8C中箭头所示的方向上翻转第一面板部分211并且弯折弯折部分213，使得设置在第一面板部分211中的第一对准标记261和设置在第二面板部分212中的第二对准标记262被对准，并且第一面板部分211和第二面板部分212彼此在垂直于表面214的第一方向上交叠。
在步骤160中，在弯折弯折部分213之后，第一膜部分221的靠近第二膜部分222的第一边缘被设计成距第一面板部分211与弯折部分213之间的第一边界第一距离x1，该第二距离x1大于0。
由于第一距离x1大于0，所以可以避免保护膜220的第一膜部分221与弯折部分213一起被弯折。
需要说明的是，上述步骤可以并行地或者以其他顺序进行。并且，上述步骤中的一个或多个步骤可以被省略。
本公开的范围并非由上述描述的实施方式来限定，而是由所附的权利要求书及其等同范围来限定。

Claims (18)

  1. 一种显示装置，包括：
    柔性面板，包括第一面板部分、第二面板部分、连接在所述第一面板部分和所述第二面板部分之间的弯折部分；以及
    保护膜，粘附到所述柔性面板的非显示侧的表面上，并且包括粘附到所述第一面板部分的第一膜部分和粘附到所述第二面板部分的第二膜部分，
    其中，所述柔性面板在所述弯折部分处被弯折使得所述第一面板部分和所述第二面板部分彼此在垂直于所述表面的第一方向上交叠，并且
    所述第一膜部分的靠近所述第二膜部分的第一边缘距所述第一面板部分与所述弯折部分之间的第一边界为第一距离，所述第二膜部分的靠近所述第一膜部分的第二边缘距所述第二面板部分与所述弯折部分之间的第二边界为第二距离，所述第一距离和所述第二距离的和大于0，并且所述第一距离和所述第二距离均不小于0。
  2. 根据权利要求1所述的显示装置，其中，所述第一距离等于0。
  3. 根据权利要求1所述的显示装置，其中，所述第二距离等于0。
  4. 根据权利要求1所述的显示装置，其中，所述第一距离和所述第二距离均大于0。
  5. 根据权利要求1-4任一所述的显示装置，其中，
    所述柔性面板还包括设置在第一面板部分中的第一对准标记和设置在第二面板部分中的第二对准标记，所述第一对准标记和所述第二对准标记用于在弯折所述弯折部分时用于对准。
  6. 根据权利要求5所述的显示装置，其中，
    所述第一距离和所述第二距离中的至少一个大于或等于对准所述第一对准标记和所述第二对准标记的最大偏差的绝对值与所述第一膜部分和所述第二膜部分之间的开口的宽度的最大制造偏差的绝对值的和。
  7. 根据权利要求1-6任一所述的显示装置，其中，所述第一距离和所述第二距离中的至少一个在大于0且小于等于200μm的范围内。
  8. 根据权利要求1-7任一所述的显示装置，还包括散热膜，其中，在所述第一方向上，所述散热膜在所述第一膜部分和所述第二膜部分之间，并且 所述散热膜覆盖整个所述第一膜部分。
  9. 根据权利要求1-7任一所述的显示装置，其中，所述柔性面板在所述弯折部分处被弯折使得所述第二膜部分接触所述第一膜部分。
  10. 根据权利要求1-9任一所述的显示装置，其中，所述第一面板部分包括显示单元，所述显示单元包括多个像素，每个像素包括发光元件和像素电路。
  11. 根据权利要求1-10任一所述的显示装置，还包括：柔性印刷电路板，其中，所述柔性印刷电路板连接到第二面板部分。
  12. 一种显示装置的制造方法，包括：
    将保护膜粘附到柔性面板的非显示侧表面上，其中，所述柔性面板包括第一面板部分、第二面板部分和连接在所述第一面板部分和所述第二面板部分之间的弯折部分；
    移除所述保护膜的一部分，以形成粘附到所述第一面板部分的第一膜部分和粘附到所述第二面板部分的第二膜部分；以及
    弯折所述弯折部分，使得所述第一面板部分和所述第二面板部分彼此在垂直于所述非显示侧表表面的第一方向上交叠，
    其中，所述第一膜部分的靠近所述第二膜部分的第一边缘距所述第一面板部分与所述弯折部分之间的第一边界为第一距离，所述第二膜部分的靠近所述第一膜部分的第二边缘距所述第二面板部分与所述弯折部分之间的第二边界为第二距离，所述第一距离和所述第二距离的和大于0，并且所述第一距离和所述第二距离均不小于0。
  13. 根据权利要求12所述的方法，其中，
    弯折所述弯折部分包括：
    固定所述第一面板部分和所述第二面板部分中的一个；以及
    翻转所述第一面板部分和所述第二面板部分中的另一个，使得设置在第一面板部分中的第一对准标记和设置在第二面板部分中的第二对准标记被对准。
  14. 根据权利要求13所述的方法，其中，
    所述第一距离等于0，
    弯折所述弯折部分包括：
    固定所述第一面板部分；以及
    翻转所述第二面板部分，使得设置在第一面板部分中的第一对准标记和设置在第二面板部分中的第二对准标记被对准。
  15. 根据权利要求13所述的方法，其中，
    所述第二距离等于0，
    弯折所述弯折部分包括：
    固定所述第二面板部分；以及
    翻转所述第一面板部分，使得设置在第一面板部分中的第一对准标记和设置在第二面板部分中的第二对准标记被对准。
  16. 根据权利要求13所述的方法，其中，所述第一距离和所述第二距离均大于0。
  17. 根据权利要求12-16任一所述的方法，还包括：
    将散热膜粘附到所述第一膜部分的背离所述第一面板部分的一侧，其中，所述散热膜覆盖整个所述第一膜部分。
  18. 根据权利要求12-16任一所述的方法，其中，所述第一距离和所述第二距离中的至少一个在大于0且小于等于200μm的范围内。
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