KR20200124059A - A display including a transparent protective layer having a different thickness in a bending region and a flexible electronic device having the same - Google Patents

Abstract

Disclosed is a display. According to various embodiments of the present invention, the display comprises: a flexible display panel including a bendable bending portion, a first area extending from one side of the bending portion, and a second area extending in a direction opposite to the first area from the other side of the bending portion; a transparent layer disposed on the flexible display panel; and a transparent photosensitive film (TPF) disposed on at least one surface of the transparent layer, cured in an area corresponding to the first area and the second area, and developed in an area corresponding to the bending area to be thinner than the first area and the second area. According to various embodiments of the present invention, an electronic device can increase the strength of the surface of the display by laminating a protective film on the surface of the display, thereby improving the durability of the electronic device.

Description

A display including a protective layer having a different thickness in the bending area, and a flexible electronic device including the same.

Various embodiments relate to a display including a passivation layer having a different thickness in a bending area, and a flexible electronic device including the same.

Electronic devices such as mobile devices are gradually becoming smaller, but demand for large screen display devices is also increasing. The mobile device can minimize a bezel on a surface on which the display device is disposed in response to a demand for a large screen display device.

Even if the bezel is minimized, since it is difficult to expand the screen due to the limitation of the size of the electronic device, the electronic device may include a foldable display device. The foldable display device can be folded and unfolded as needed, and the user can select and use a large screen or a small screen. The display of the foldable display device may be formed of a substrate including a flexible material, and windows stacked on the display may also be formed of a flexible material.

Since the foldable display device is formed of a soft material, there is a higher risk of surface damage compared to other display devices. In order to prevent surface damage, when the thickness of the protective film is increased, compressive force and tensile force are applied to the foldable area of the foldable display by the use of an electronic device, so that deformation due to stress may occur.

Deformation of the foldable area may cause a bend or step, and the deformation of the foldable area may be visually recognized to the outside. Electronic devices according to various embodiments of the present disclosure require various methods to increase rigidity of a display surface while reducing the cause of deformation.

The display may include a bendable bending portion, a first region extending from one side of the bending region, and a second region extending from the other side of the bending region in a direction opposite to the first region. ) A display panel, a transparent layer disposed on the flexible display panel, and a transparent layer disposed on at least one surface of the transparent layer, cured in a region corresponding to the first region and the second region, in the bending region A transparent photosensitive film (TPF) that is developed in a corresponding region and is thinner than the first region and the second region may be included.

The foldable electronic device, as a foldable housing, includes a hinge structure, a first surface connected to the hinge structure and facing in a first direction, and a second surface facing in a second direction opposite to the first direction. 1 housing structure, a third surface connected to the hinge structure, facing in a third direction, and a fourth surface facing in a fourth direction opposite to the third direction, wherein the first surface is connected to the hinge structure as an axis. A second housing structure folded with the housing structure, and a side member surrounding at least a portion of a space between the first and second surfaces and a space between the third and fourth surfaces; A foldable housing including, a bendable bending portion, a first region extending from one side of the bending region, and a second region extending from the other side of the bending region in a direction opposite to the first region A window including a flexible display panel, a transparent layer disposed on the flexible display, a first transparent photosensitive film disposed on the transparent layer, and a protective layer disposed on the first photosensitive film, And a display forming the first surface and the third surface, and the first photosensitive film may form a groove formed to correspond to the bending area on a surface opposite to a surface in contact with the transparent layer.

According to various implementations, the electronic device may increase the strength of the display surface by laminating a protective film on the display surface, thereby improving durability of the electronic device.

According to various embodiments, flexibility may be secured by forming a thin protective film in a bending area of an electronic device.

1 is a diagram illustrating an unfolded state of an electronic device according to an exemplary embodiment.
2 is a diagram illustrating a folded state of an electronic device according to an exemplary embodiment.
3 is an exploded perspective view of an electronic device according to an exemplary embodiment.
4 is a diagram illustrating a display according to an exemplary embodiment.
5 is a cross-sectional view taken along line AA′ of the display of FIG. 4 according to an exemplary embodiment.
6A and 6B illustrate a manufacturing process of a display according to an exemplary embodiment.
7A and 7B exemplarily illustrate a deformation of a display according to repetition of folding or unfolding of the electronic device.
8 to 11 illustrate various examples of arrangements of various types of transparent photosensitive films included in the display of FIG. 5.

1 is a diagram illustrating an unfolded state of an electronic device according to an exemplary embodiment, and FIG. 2 is a diagram illustrating a folded state of an electronic device according to an exemplary embodiment.

Referring to FIGS. 1 and 2, in an embodiment, the electronic device 10 includes a foldable housing 500, a hinge cover 530 covering a foldable portion of the foldable housing, and the foldable housing. A flexible or foldable display 100 (hereinafter, abbreviated as “display” 100) disposed in the space formed by 500 may be included. In this document, the surface on which the display 100 is disposed is defined as the first surface or the front surface of the electronic device 10. In addition, the opposite surface of the front surface is defined as the second surface or the rear surface of the electronic device 10. In addition, a surface surrounding the space between the front and rear surfaces is defined as a third surface or a side surface of the electronic device 10.

In one embodiment, the foldable housing 500 includes a first housing structure 510, a second housing structure 520 including a sensor area 524, a first rear cover 580, and a second rear surface. A cover 590 may be included. The foldable housing 500 of the electronic device 10 is not limited to the shape and combination shown in FIGS. 1 and 2, and may be implemented by combining and/or combining other shapes or components. For example, in another embodiment, the first housing structure 510 and the first rear cover 580 may be integrally formed, and the second housing structure 520 and the second rear cover 590 are integrally formed. Can be formed.

In the illustrated embodiment, the first housing structure 510 and the second housing structure 520 are disposed on both sides around a folding axis (A axis), and may have a shape that is generally symmetric with respect to the folding axis A. . As will be described later, the first housing structure 510 and the second housing structure 520 have different angles or distances depending on whether the electronic device 10 is in an open state, a folded state, or an intermediate state. I can. In the illustrated embodiment, unlike the first housing structure 510, the second housing structure 520 additionally includes the sensor area 524 in which various sensors are disposed, but in other areas, the second housing structure 520 has a mutually symmetric shape. Can have

In an embodiment, as shown in FIG. 1, the first housing structure 510 and the second housing structure 520 may form a recess for accommodating the display 100 together. In the illustrated embodiment, due to the sensor region 524, the recess may have two or more different widths in a direction perpendicular to the folding axis A.

For example, the recess is (1) formed at the edge of the sensor region 524 of the first housing structure 510 and the first portion 510a parallel to the folding axis A and the second housing structure 520 The first width w1 between the first portion 520a, and (2) does not correspond to the sensor region 524 of the second portion 510b and the second housing structure 520 of the first housing structure 510. It may have a second width w2 formed by the second portion 520b parallel to the folding axis A while not being formed. In this case, the second width w2 may be formed longer than the first width w1. In other words, the first portion 510a of the first housing structure 510 having an asymmetric shape and the first portion 520a of the second housing structure 520 form a first width w1 of the recess. And, the second portion 510b of the first housing structure 510 having a mutually symmetric shape and the second portion 520b of the second housing structure 520 form a second width w2 of the recess. I can. In an embodiment, the first portion 520a and the second portion 520b of the second housing structure 520 may have different distances from the folding axis A. The width of the recess is not limited to the illustrated example. In various embodiments, the recess may have a plurality of widths due to the shape of the sensor region 524 or a portion having an asymmetric shape of the first housing structure 510 and the second housing structure 520.

In one embodiment, at least a portion of the first housing structure 510 and the second housing structure 520 may be formed of a metal material or a non-metal material having a rigidity of a size selected to support the display 100.

In an embodiment, the sensor region 524 may be formed to have a predetermined region adjacent to one corner of the second housing structure 520. However, the arrangement, shape, and size of the sensor area 524 are not limited to the illustrated example. For example, in another embodiment, the sensor region 524 may be provided at another corner of the second housing structure 520 or in any region between the upper and lower corners. In one embodiment, components for performing various functions built into the electronic device 10 are electronically transmitted through the sensor area 524 or through one or more openings provided in the sensor area 524. It may be exposed on the front of the device 10. In various embodiments, the components may include various types of sensors. The sensor may include, for example, at least one of a front camera, a receiver, and a proximity sensor.

The first rear cover 580 is disposed on one side of the folding shaft on the rear surface of the electronic device, may have, for example, a substantially rectangular periphery, and the first housing structure 510 The edges can be wrapped. Similarly, the second rear cover 590 may be disposed on the other side of the folding shaft on the rear surface of the electronic device, and the edge thereof may be wrapped by the second housing structure 520.

In the illustrated embodiment, the first rear cover 580 and the second rear cover 590 may have a substantially symmetrical shape around the folding axis (A axis). However, the first rear cover 580 and the second rear cover 590 do not necessarily have mutually symmetrical shapes. In another embodiment, the electronic device 10 includes a first rear cover 580 having various shapes and A second rear cover 590 may be included. In another embodiment, the first rear cover 580 may be integrally formed with the first housing structure 510, and the second rear cover 590 may be integrally formed with the second housing structure 520. have.

In one embodiment, the first rear cover 580, the second rear cover 590, the first housing structure 510, and the second housing structure 520 are various components of the electronic device 10 (for example, A space in which a printed circuit board or a battery) can be disposed may be formed. In an embodiment, one or more components may be disposed or visually exposed on the rear surface of the electronic device 10. For example, at least a portion of the sub-display 190 may be visually exposed through the first rear area 582 of the first rear cover 580. In another embodiment, one or more components or sensors may be visually exposed through the second rear area 592 of the second rear cover 590. In various embodiments, the sensor may include a proximity sensor and/or a rear camera.

Referring to FIG. 2, the hinge cover 530 is disposed between the first housing structure 510 and the second housing structure 520 to be configured to cover an internal part (eg, a hinge structure). I can. In one embodiment, the hinge cover 530 may include a first housing structure 510 and a second housing structure according to the state of the electronic device 10 (flat state or folded state). 520) may be covered by a part or exposed to the outside.

For example, as shown in FIG. 1, when the electronic device 10 is in an open state, the hinge cover 530 may be covered by the first housing structure 510 and the second housing structure 520 and may not be exposed. . For example, as shown in FIG. 2, when the electronic device 10 is in a folded state (for example, in a fully folded state), the hinge cover 530 includes a first housing structure 510 and a second housing. It may be exposed to the outside between the structures 520. For example, when the first housing structure 510 and the second housing structure 520 are in an intermediate state in which the first housing structure 510 and the second housing structure 520 are folded with a certain angle, the hinge cover 530 has a first housing structure. A portion may be exposed to the outside between the 510 and the second housing structure 520. However, in this case, the exposed area may be less than the fully folded state. In one embodiment, the hinge cover 530 may include a curved surface.

The display 100 may be disposed on a space formed by the foldable housing 500. For example, the display 100 is mounted on a recess formed by the foldable housing 500 and may constitute most of the front surface of the electronic device 10.

Accordingly, the front surface of the electronic device 10 may include the display 100 and a partial region of the first housing structure 510 adjacent to the display 100 and a partial region of the second housing structure 520. Further, the rear surface of the electronic device 10 includes a first rear cover 580, a partial area of the first housing structure 510 adjacent to the first rear cover 580, a second rear cover 590, and a second rear cover. It may include a partial region of the second housing structure 520 adjacent to 590.

The display 100 may mean a display in which at least a portion of the area can be transformed into a flat or curved surface. In one embodiment, the display 100 includes a folding area 103, a first area 101 and the other side disposed on one side (left side of the folding area 103 shown in FIG. 1) based on the folding area 103 It may include a second area 102 disposed on the right side of the folding area 103 shown in FIG. 1.

The division of regions of the display 100 illustrated in FIG. 1 is exemplary, and the display 100 may be divided into a plurality (eg, four or more or two) regions according to a structure or function. As an example, in the embodiment shown in FIG. 1, the area of the display 100 may be divided by the folding area 103 extending parallel to the y-axis or the folding axis (A-axis), but in another embodiment, the display ( 100) may be divided based on another folding area (eg, a folding area parallel to the x-axis) or another folding axis (eg, a folding axis parallel to the x-axis).

The first region 101 and the second region 102 may have a shape that is generally symmetric about the folding region 103. However, unlike the first area 101, the second area 102 may include a notch cut according to the presence of the sensor area 524, but in other areas, the first area It may have a shape symmetrical to the region 101. In other words, the first region 101 and the second region 102 may include a portion having a shape symmetrical to each other and a portion having a shape asymmetrical to each other.

Hereinafter, the operation of the first housing structure 510 and the second housing structure 520 according to the state of the electronic device 10 (eg, a flat state and a folded state) and the display 100 Each area of is described.

In an embodiment, when the electronic device 10 is in a flat state (eg, FIG. 1), the first housing structure 510 and the second housing structure 520 form an angle of 180 degrees and move in the same direction. Can be arranged facing. The surface of the first area 101 and the surface of the second area 102 of the display 100 form 180 degrees to each other, and may face the same direction (eg, the front direction of the electronic device). The folding area 103 may form the same plane as the first area 101 and the second area 102.

In an embodiment, when the electronic device 10 is in a folded state (eg, FIG. 2 ), the first housing structure 510 and the second housing structure 520 may be disposed to face each other. The surface of the first area 101 and the surface of the second area 102 of the display 100 form a narrow angle (eg, between 0° and 10°) and may face each other. At least a portion of the folding area 103 may be formed of a curved surface having a predetermined curvature.

In an embodiment, when the electronic device 10 is in a folded state (for example, FIG. 2 ), the first housing structure 510 and the second housing structure 520 are at a certain angle. ) Can be placed. A surface of the first region 101 and a surface of the second region 102 of the display 100 may form an angle that is larger than the folded state and smaller than the unfolded state. At least a portion of the folding area 103 may be formed as a curved surface having a predetermined curvature, and the curvature at this time may be smaller than that in the folded state.

3 is an exploded perspective view of an electronic device according to an exemplary embodiment.

Referring to FIG. 3, in an embodiment, the electronic device 10 includes a display unit 20, a bracket assembly 30, a substrate unit 600, a first housing structure 510, and a second housing structure 520. , A first rear cover 580 and a second rear cover 590 may be included. In this document, the display unit 20 may be referred to as a display module or a display assembly.

The display unit 20 may include a display 100 and one or more plates or layers 140 on which the display 100 is mounted. In one embodiment, the plate 140 may be disposed between the display 100 and the bracket assembly 30. The display 100 may be disposed on at least a portion of one surface of the plate 140 (eg, an upper surface with reference to FIG. 3 ). The plate 140 may be formed in a shape corresponding to the display 100. For example, a partial region of the plate 140 may be formed in a shape corresponding to the notch 104 of the display 100.

The bracket assembly 30 covers a hinge structure disposed between the first bracket 410, the second bracket 420, the first bracket 410 and the second bracket 420, and the hinge structure when viewed from the outside. It may include a hinge cover 530 and a wiring member 430 (eg, a flexible printed circuit board (FPC), a flexible printed circuit) crossing the first bracket 410 and the second bracket 420.

In one embodiment, the bracket assembly 30 may be disposed between the plate 140 and the substrate part 600. For example, the first bracket 410 may be disposed between the first region 101 and the first substrate 610 of the display 100. The second bracket 420 may be disposed between the second region 102 and the second substrate 620 of the display 100.

In one embodiment, the wiring member 430 and at least a portion of the hinge structure may be disposed inside the bracket assembly 30. The wiring member 430 may be disposed in a direction crossing the first bracket 410 and the second bracket 420 (eg, in the x-axis direction). The wiring member 430 may be disposed in a direction (eg, an x-axis direction) perpendicular to the folding axis (eg, y-axis or folding axis A of FIG. 1) of the folding area 103 of the electronic device 10. have.

The substrate part 600, as mentioned above, includes a first substrate 610 disposed on the first bracket 410 side and a second substrate 620 disposed on the second bracket 420 side. I can. The first substrate 610 and the second substrate 620 are bracket assembly 30, a first housing structure 510, a second housing structure 520, a first rear cover 580 and a second rear cover It may be disposed inside the space formed by 590. Components for implementing various functions of the electronic device 10 may be mounted on the first substrate 610 and the second substrate 620.

The first housing structure 510 and the second housing structure 520 may be assembled with each other so as to be coupled to both sides of the bracket assembly 30 while the display unit 20 is coupled to the bracket assembly 30. As will be described later, the first housing structure 510 and the second housing structure 520 may slide on both sides of the bracket assembly 30 to be coupled to the bracket assembly 30.

In one embodiment, the first housing structure 510 may include a first rotational support surface 512, and the second housing structure 520 is a second rotational support corresponding to the first rotational support surface 512. It may include a face 522. The first rotation support surface 512 and the second rotation support surface 522 may include curved surfaces corresponding to the curved surfaces included in the hinge cover 530.

In an embodiment, the first rotation support surface 512 and the second rotation support surface 522 are the hinge cover 530 when the electronic device 10 is in an unfolded state (eg, the electronic device of FIG. 1 ). The hinge cover 530 may not be exposed to the rear surface of the electronic device 10 or may be exposed to a minimum. Meanwhile, the first rotation support surface 512 and the second rotation support surface 522 are curved surfaces included in the hinge cover 530 when the electronic device 10 is in a folded state (eg, the electronic device of FIG. 2 ). By rotating along the hinge cover 530 may be exposed to the rear surface of the electronic device 10 as much as possible.

Electronic devices according to various embodiments disclosed in this document may be devices of various types. The electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. The electronic device according to the embodiment of the present document is not limited to the above-described devices.

Various embodiments of the present document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutes of the corresponding embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or a plurality of the items unless clearly indicated otherwise in a related context. In this document, “A or B”, “at least one of A and B”, “at least one of A or B,” “A, B or C,” “at least one of A, B and C,” and “A Each of the phrases such as "at least one of B, or C" may include all possible combinations of items listed together in the corresponding phrase among the phrases. Terms such as "first", "second", or "first" or "second" may be used simply to distinguish the component from other corresponding components, and the components may be referred to in other aspects (eg, importance or Order) is not limited. Some (eg, a first) component is referred to as “coupled” or “connected” with or without the terms “functionally” or “communicatively” to another (eg, second) component. When mentioned, it means that any of the above components can be connected to the other components directly (eg by wire), wirelessly, or via a third component.

4 is a diagram illustrating a display according to an exemplary embodiment.

According to various embodiments, the display unit 20 may include a transparent plate 710, a polarizing layer 730, and a display panel 750. The display unit 20 may include a first area 101, a second area 102, and a folding area 103. The display unit 20 may include a plurality of folding areas. For example, the folding area may be additionally formed between the second area 102 and another planar area. Through this, a folding area may be included on both sides of the second area 102. According to various embodiments, the planar region extending from the second region 102 may be symmetrical with the first region 101 or the second region 102 and may be formed asymmetrically. According to various embodiments, the folding area may be formed in various positions of the display. Each layer of the display unit 20 may also be folded in the folding area 103. The display unit 20 may be formed of a soft material.

According to an embodiment, the transparent plate 710 may include a soft polymer layer (eg, polyimide (PI) or polyethylene terephthalate (PET)). The transparent plate 710 may be formed of a plurality of layers. The transparent plate 710 may form a part of the exterior of the housing (eg, the first housing 510 or the second housing 520) of the electronic device (eg, the electronic device 10 of FIG. 1 ). The transparent plate 710 may include a transparent photosensitive film (TPF) in order to maintain flexibility and rigidity. The transparent plate 710 may also be formed of a plurality of layers of a transparent material. An additional cover window may be included over the photosensitive film.

According to an embodiment, the polarizing layer 730 may be disposed on one surface of the transparent plate 710 and disposed on the display panel 750 disposed in an inner space of the electronic device housing. The polarizing layer 730 may convert unpolarized light emitted from the display 750 into linearly polarized light. The polarization layer 730 may further include a phase delay layer that converts linearly polarized light into circularly polarized light.

According to an embodiment, the display panel 750 may be disposed under the polarizing layer 730. The display panel 750 may include a pixel layer and a thin film transistor (TFT) layer. The TFT layer can be controlled to emit a specified color from the pixel layer. Light emitted from the pixel layer may pass through the polarizing layer 730 and the transparent plate 710 stacked on the display panel 750 and transmitted to the outside.

At least a portion of the display unit 20 may include a notch 104, and a sensor module or a camera module may be disposed under the notch 104 area. According to various embodiments, the display unit 20 may include a hole corresponding to an area in which a sensor module or a camera module is disposed. For example, in the display unit 20, the first area 101 and the second area 102 may be formed symmetrically, and the display unit 20 may be formed in the area corresponding to the notch 104. . The display unit 20 may include a hole for transmitting signals transmitted and received from the sensor. The sensor may be disposed below the region corresponding to the notch 104, and the sensor may be disposed to correspond to the hole.

5 is a cross-sectional view taken along line AA′ of the display of FIG. 4 according to an exemplary embodiment.

Referring to FIG. 5, the display unit 20 may include a transparent plate 710, a polarizing layer 730, a display panel 750, a buffer member 760 (or a cushion layer), or a shielding layer 770. I can.

According to an embodiment, the buffer member 760 may be stacked on the shielding layer 770. The cushioning member 760 is compressed when pressed (or pressure) acts to absorb or alleviate an external impact on the transparent plate 710, and a material having elasticity restored to the original harm when the pressing is removed can be applied. have. The buffer member 760 may be a black layer including a plurality of air holes or a pattern (or embossed pattern) having an uneven shape for compression when pressed.

According to an embodiment, the shielding layer 770 may be attached to the lower portion of the buffer member 760. An adhesive layer for attaching therebetween may be interposed between the shielding layer 770 and the buffer member 760. The shielding layer 770 may block heat generated from other electronic components included in the electronic device. For example, a main processor, a graphic processing device, a communication processor, and a battery mounted on a printed circuit board (for example, 30 in FIG. 3) of an electronic device generate a lot of heat when driven as major heat sources of an electronic device. I can. The shielding layer 770 may block heat transfer from such electronic components to prevent performance degradation of the display panel 750.

According to an embodiment, the display panel 750 may include a touch panel 759 and a pixel layer 751. The touch panel 759 may be formed of an On cell type formed on a cell of the pixel layer 751 or an In cell type formed together with a cell of the pixel layer 751. According to another embodiment, the touch panel 759 may be formed as an add-on type attached to the display panel. The touch panel 759 may include a conductive pattern and may sense a user's approach or contact.

According to an exemplary embodiment, the display panel 750 may further include any suitable components such as a thin film encapsulation layer for encapsulating the pixel layer and a back film for supporting the base substrate.

According to an embodiment, an adhesive member (or a pressure-sensitive adhesive or adhesive) may be used to mutually attach the transparent plate 710, the polarizing layer 730, and the display panel 750, and respective layers included therein. The adhesive member may include, for example, a double-sided adhesive film, a pressure sensitive adhesive (PSA), an optical clear adhesive (OCA), or an optical clear adhesive resin (OCR). I can.

According to an embodiment, the transparent plate 710 may include a transparent layer (or a polyimide (PI) layer) 711 or a photosensitive adhesive film 716 (TPF, transparent photosensitive film). The transparent layer 711 may include a PI layer or a transparent layer. For example, the transparent layer 711 may include a soft polymer layer (eg, polyimide (PI) or polyethylene terephthalate (PET)). The photosensitive adhesive film 716 may be disposed on the PI layer 711. The transparent plate 710 may further include a plurality of layers. For example, the transparent plate 710 may include an anti-reflection layer (or AR layer, antireflection layer), an anti-glare layer (or AG layer, antiglare layer), an anti-fingerprint layer (or AF layer, anti-fingerprint layer), or a hard coating layer. I can. Each of the layers forming the transparent plate 710 may function to prevent reflection, prevent glare, prevent external visibility of components inside the electronic device, or enhance surface hardness.

According to various embodiments, an additional hard coating layer may be included separately from the hard coating layer included in the transparent plate 710. The hard coating layer may be disposed on the photosensitive adhesive film 716 and may form an outer surface of the transparent plate 710.

According to an embodiment, the PI layer 711 may be transparent and flexible. The PI layer 711 may include a transparent material capable of transmitting light emitted from a pixel to the outside, and the PI layer 711 may include a flexible material applicable to a foldable electronic device.

Strength can be improved with various types of strength protective films laminated on the PI layer 711. In order to secure flexibility in the bending area 103, the strength protection film may have a thickness of the bending area 103 thinner than that of the rest area. The strength protective film may be formed by removing the film in the region corresponding to the bending region 103. According to various embodiments, the strength protection film may include a transparent photosensitive film 716. The transparent photosensitive film 716 may be disposed on the PI layer 711 to reinforce the rigidity of the PI layer 711, which is a flexible material. The transparent photosensitive film 716 can increase the durability of the display unit 20 by reinforcing the rigidity of the PI layer 711, and can be manufactured with a uniform thickness. The transparent photosensitive film 716 may be adhered to the PI layer 711 or other layers forming the display unit 20 with an adhesive force of itself during bonding. For example, a separate adhesive member may be bonded between the transparent photosensitive film 716 and the PI layer 711 without interposing. By using the transparent photosensitive film 716, the overall thickness of the display unit 20 may be reduced.

The transparent photosensitive film 716 may be formed with a first thickness t1 in the first region 101 and the second region 102, and a second thickness thinner than the first thickness t1 in the folding region 103 Can be formed as In the folding area 103, the transparent photosensitive film 716 may include a groove 719 recessed toward the display panel 750. The transparent photosensitive film 716 may be an acrylic film including a photoinitiator. The transparent photosensitive film 716 may be cured by a chemical reaction of a photoinitiator by ultraviolet rays including strong energy. For example, the transparent photosensitive film 716 may be converted into a polymer by transmitting strong energy of ultraviolet rays in the state of a monomer or an intermediate (oligomer). The photoinitiator included in the transparent photosensitive film 716 may be cured into a solid polymer by initiating a photopolymerization reaction in a liquid monomer or intermediate. The groove 719 of the transparent photosensitive film 716 is not cured by ultraviolet rays, but may be removed and formed during the development process.

According to various embodiments, the transparent photosensitive film 716 may be formed with a specified thickness t1. The transparent photosensitive film 716 may be formed of a first reinforcement part 717a, a second reinforcement part 717b, and a deformation part 718 corresponding to the first region 101. The deformation portion 718 is a portion corresponding to the groove 719, and the thickness of the deformation portion 718 may be formed to be thinner than the specified thickness t1. The thickness of the deformation portion 718 may be formed to a thickness such that deformation does not occur in the folded state of the electronic device. According to various embodiments, the deformable part 718 may be formed by removing at least a part of the transparent photosensitive film 716 in a region corresponding to the folding region 103. For example, the deformed portion 718 may be partially removed to form a groove, and may be formed between the first and second reinforcing portions 717a and 717b. The transparent photosensitive film 716 in the area corresponding to the folding area 103 is completely removed, so that the first reinforcing portion 717a and the second reinforcing portion 717b may be separated from each other.

According to various embodiments, the deformable portion 718 may be removed from a partial thickness of the deformable portion 718, so that the thickness of the deformable portion 718 is easily adjusted. The transparent photosensitive film 716 can select flexibility and strength according to the degree of curing of ultraviolet rays.

According to various embodiments, the display unit 20 may be an in-folding type flexible display in which the display panels 750 are deformed to face each other around the deformable unit 718, and the deformable unit 718 is centered on the display unit 718. As a result, the display panel 750 may be an out-folding type flexible display that is exposed to the outside in a folded state.

6A and 6B illustrate a manufacturing process of a display according to an exemplary embodiment.

Referring to FIG. 6A, a display panel 750, a polarizing layer 730, a PI layer 711, and a transparent photosensitive film 716 may be sequentially stacked on the buffer member 760. Through the process of manufacturing the display unit 20, an adhesive layer may be interposed between each layer. The adhesive layer may be formed of, for example, a double-sided adhesive film, a pressure-sensitive adhesive, an optically transparent adhesive film, or an optically transparent adhesive resin. According to various embodiments, a layer in contact with the transparent photosensitive film 716 (eg, a PI layer 711 or a hard coating layer in contact with the transparent photosensitive film) may be bonded without a separate adhesive. Since the transparent photosensitive film has its own adhesive strength, the thickness of the transparent plate 710 may be formed to be thin.

According to an embodiment, the transparent photosensitive film 716 may include an acrylic resin containing a photoinitiator. The photoinitiator of the laminated transparent photosensitive film 716 may be a liquid monomer or an intermediate.

According to various embodiments, a transmission layer 790 including a mask 791 may be partially disposed on the stacked display unit 20. In the mask 791, the transmission layer 790 may be positioned on the display unit 20 to be positioned corresponding to the folding area (eg, the folding area 103 of FIG. 5 ). When ultraviolet rays are irradiated from the upper portion of the transmission layer 790 toward the display unit 20, the ultraviolet rays cannot be transmitted in the region where the mask 791 is located, and the ultraviolet rays may pass through the transmission layer 790 in the remaining regions. . The transmitted ultraviolet rays may reach the transparent photosensitive film 716, and the transparent photosensitive film 716 may be cured by the transmitted ultraviolet rays. For example, the transparent photosensitive film 716 may be transformed from a liquid state to a solid polymer by receiving energy from ultraviolet rays.

According to various embodiments, a region to which ultraviolet rays cannot be reached by the mask 791 may be maintained as a liquid monomer or intermediate. The transparent photosensitive film 716 may include a region cured by ultraviolet rays transmitted through the transmission layer 790 in which the mask 791 is not located, and a region in which the mask 791 is positioned so that an image is maintained.

According to an embodiment, the transparent photosensitive film 716 may undergo a development process after curing by ultraviolet rays. Through the developing process, a portion of the transparent photosensitive film 716 that is not exposed to ultraviolet rays by the mask 791 may be removed.

Referring to FIG. 6B, the transparent photosensitive film 716 may include a groove 719 through a curing and developing process. The transparent photosensitive film 716 may include a first reinforcement part 717a, a second reinforcement part 717b, and a deformation part 718. According to various embodiments, the first reinforcement part 717a and the second reinforcement part 717b may be regions that are cured by irradiating ultraviolet rays through the transmission layer 790. The first reinforcement portion 717a and the second reinforcement portion 717b may be maintained at a predetermined thickness t1 or more to improve the strength of the PI layer 711 and the display panel 750, and the first reinforcement portion 717a ) And the second reinforcing part 717b may have a hardness greater than that of the PI layer 711. According to another embodiment, the first reinforcement part 717a and the second reinforcement part 717b may be formed on the PI layer 711 to prevent scratches that may be formed by being stamped on the PI layer 711.

According to various embodiments, the deformable part 718 may be formed by removing an uncured transparent photosensitive film through a developing process. The thickness of the deformable part 718 may be thinner than that of the first and second reinforcing parts 717a and 717b. Flexibility can be secured even when the display unit 20 is folded through the thinly formed deformable portion 718.

The width w of the deformable portion 718 may be formed to be wider than a region in which deformation occurs when the inflexible display is repeatedly bent. The width of the folding region 103 and the width of the deformable portion 718 may be the same, and the width of the deformable portion 718 may be greater than the width of the folding region 103.

7A and 7B exemplarily illustrate a deformation of a display according to repetition of folding or unfolding of the electronic device.

7A and 7B, the display unit 20 may deform the folding area 103 by a plurality of bendings. Various types of deformation may have a repetitive uneven shape or uneven shape in the bending area. As for the deformation that appears mainly, there is no deformation in the first region 101 and the second region 102, and some deformation may occur in the bending region 103. During the bending and spreading process of the bending region 103, stress is applied, and deformation may occur due to residual stress. The display unit 20 may be mainly deformed into a bending area 103a having two irregularities or a bending area 103b having one groove or protrusion. By providing the shape of the bending area of FIG. 5 or 6B, flexibility in the bending area 103a or 103b to be deformed can be secured, and the display unit 20 can be prevented from being deformed. The bending area 103a or 103b may correspond to the deformation part 718 of FIG. 6A or 6B, and the width w of the groove of the transparent photosensitive film formed in the bending area may be 3mm to 7.5mm.

8 to 11 illustrate various examples of arrangements of various types of transparent photosensitive films included in the display of FIG. 5.

Referring to FIG. 8, the display unit 20 includes a buffer member 760, a display panel 750 disposed on the buffer member 760, a polarizing layer 730 disposed on the display panel 750, and a polarizing layer. A PI layer 711 disposed on 730, a transparent photosensitive film 716 disposed on the PI layer 711, and a cover window 720 disposed on the transparent photosensitive film 716 may be included. Compared with FIG. 5, the display unit 20 of FIG. 8 may further include a cover window 720.

The cover window 720 may be disposed on the transparent photosensitive film 716. The cover window 720 may be formed of a transparent material. The cover window 720 may include PET material. The PI layer 711, the transparent photosensitive film 716, and the cover window 720 may be combined with each other to form a transparent plate (eg, the transparent plate 710 of FIG. 4 ). The transparent plate 710 may be formed of a plurality of layers, and may include an additional layer or coating in addition to the PI layer 711, the transparent photosensitive film 716, and the cover window 720. For example, a hard coating layer for reinforcing the strength of the PI layer 711 may be included, and a transparent layer including a PET material may be additionally included under the PI layer 711.

When the groove 719 of the transparent photosensitive film 716 is removed, a space may be formed as much as an area in which the groove 719 is formed. When the cover window 720 is stacked on the transparent photosensitive film 716, the groove 719 may have an air gap. Air and the transparent photosensitive film 716 may have different refractive indices. Due to the difference in refractive index between the air and the transparent photosensitive film 716, the boundary between the folding area 103 and the first area 101 or the second area 102 may be visually recognized from the outside.

According to various embodiments, a transparent filler 725 may be disposed in the groove 719 of the transparent photosensitive film 716. The filler 725 may secure flexibility and use a material with high transmittance and low reflectance. For example, the filler 725 may be a liquid type and may be formed of a material having a refractive index similar to that of the transparent photosensitive film 716. When the refractive index of the transparent photosensitive film 716 is different, external visibility of the boundary between the folding area 103 and the first area 101 or the second area 102 through adjusting the optical characteristics of the transparent photosensitive film 716 Can be prevented.

According to various embodiments, the outside of the boundary between the folding area 103 and the first area 101 or the second area 102 by adjusting the optical properties of the transparent photosensitive film 716 without including the filler 725 You can prevent poetry. The optical characteristics of the transparent photosensitive film 716 may be adjusted by adjusting the brightness such as L*, a*, and b*, and the perceived chromaticity to improve the reflectance or refractive index, or the phase delay of light ( retardation). In addition, external visibility of the boundary between the folding region 103 and the first region 101 or the second region 102 may be prevented by adjusting the index matching of the substrate surface of the transparent photosensitive film 716. The color sense of the transparent photosensitive film 716 can be adjusted by adding a dye to the substrate of the transparent photosensitive film 716.

According to various embodiments, the width of the groove 719 may be larger than the width w of the deformable portion 718 of the display unit 20. The step difference of the groove 719 (for example, the difference between the height of the deformation portion 718 and the first reinforcement portion 717a or the second reinforcement portion 717b based on the PI layer 711) is approximately 30 μm or less Can be formed as The thickness of the transparent photosensitive film 716 may be formed to a thickness sufficient to reinforce the rigidity of the PI layer 711 and the display panel 750, and may be formed within about 40 μm.

Referring to FIG. 9, the display unit 20 includes a buffer member 760, a display panel 750 disposed on the buffer member 760, a polarizing layer 730 disposed on the display panel 750, and a polarizing layer. A transparent photosensitive film 916 disposed on 730, a transparent layer 911 (or PI layer) disposed on the transparent photosensitive film 916, and a cover window 720 disposed on the transparent layer 911 It may include. Compared with FIG. 8, in the display unit 20 of FIG. 9, a transparent photosensitive film 916 may be disposed between the polarizing layer 730 and the transparent layer 911. The transparent layer 911 may include a PI material or a soft transparent material.

According to various embodiments, the transparent photosensitive film 916 may be formed as one of layers forming a transparent plate formed on the display panel 750 to protect the display panel 750. Even when the transparent photosensitive film 916 is disposed under the PI layer 911 of the transparent plate, the thickness of the deformable portion 918 is formed to be thinner than the thickness of the first and second reinforcing portions 917a and 917b. Can be. The deformable part 918 is formed to have a thin thickness, so that when the display part 20 is converted to a folded state or a folded state, flexibility may be ensured. The first reinforcing portion 917a and the second reinforcing portion 917b may be formed to have a sufficient thickness to reinforce the strength of the PI layer 911.

The transparent photosensitive film 916 may be disposed between the PI layer 911 and the polarizing layer 730. According to various embodiments, the transparent photosensitive film 916 may be laminated through various processes. The transparent photosensitive film 916 is first laminated on one surface of the PI layer 911, and ultraviolet rays may be irradiated onto the transparent photosensitive film 916 through a transparent plate including a mask corresponding to the deformation portion 918. The region corresponding to the deformed portion 918 of the transparent photosensitive film 916 is not cured by ultraviolet rays, and the first region 917a and the second region 917b of the transparent photosensitive film 916 are cured by ultraviolet rays. I can. Through the developing process, a part of the transparent photosensitive film 916 is removed so that the deformation portion 918 may be formed to have a thin thickness. The deformation part 918 of the transparent photosensitive film 916 may have a groove 919, and the transparent photosensitive film 916 contacts one surface of the PI layer 911, but a part of the transparent photosensitive film 916 is polarized. It may not be in contact with the layer 730. A portion of the transparent photosensitive film 916 that does not contact the polarizing layer 730 may correspond to the deformation portion 918 and may be a groove 919 formed in the deformation portion 918. The width of the groove 919 formed in the deformable portion 918 may be narrower toward the PI layer 911.

According to various embodiments, one surface of the polarizing layer 730 may be stacked on one surface of the display panel 750. The transparent photosensitive film 916 may be laminated on the other surface of the polarizing layer 730. For example, the transparent photosensitive film 916 may face the display panel 750 with the polarizing layer 730 therebetween. Ultraviolet rays may be irradiated to the transparent photosensitized island film 916 through a transparent plate including a mask corresponding to the deformable part 918. The region corresponding to the deformed portion 918 of the transparent photosensitive film 916 is not cured by ultraviolet rays, and the first region 917a and the second region 917b of the transparent photosensitive film 916 are cured by ultraviolet rays. I can. Through the developing process, a part of the transparent photosensitive film 916 is removed, so that the deformation portion 918 may be formed to have a thin thickness to have a groove 919. Different from that shown in FIG. 9, the transparent photosensitive film 916 does not contact one surface of the PI layer 911, but a part of the transparent photosensitive film 916 may contact the polarizing layer 730. A part of the transparent photosensitive film 916 that does not contact the PI layer 911 may correspond to the deformation portion 918 and may be a groove 919 formed in the deformation portion 918. The width of the groove 919 formed in the deformable portion 918 may be wider toward the PI layer 911.

According to various embodiments, the groove 919 of the transparent photosensitive film 916 may be formed in a different shape according to the folding type of the display unit 20.

Referring to FIG. 10, the display unit 20 includes a buffer member 760, a display panel 750 disposed on the buffer member 760, a polarizing layer 730 disposed on the display panel 750, and a polarizing layer. A first transparent photosensitive film 916 disposed on 730, a PI layer 911 disposed on the first transparent photosensitive film 916, and a second transparent photosensitive film 913 disposed on the PI layer 911 ) And a cover window 720 disposed on the second transparent photosensitive film 913. Compared with FIG. 9, in the display unit 20 of FIG. 10, a second transparent photosensitive film 913 may be disposed between the PI layer 911 and the cover window 720.

According to various embodiments, the thickness t3 of the first transparent photosensitive film 916 may be equal to or thicker than the thickness t2 of the second transparent photosensitive film 913. The first transparent photosensitive film 916 includes the groove 919 in the folding area 103, and the thickness of the deformation portion 918 may be thin, but the thickness t2 of the second transparent photosensitive film 913 Since is the same in the folding region 103, the first region 101, and the second region 102, the thickness may be thin for folding in the folding region 103. The thickness of the deformable part 918 may be determined in consideration of the thickness t2 of the second transparent photosensitive film 913.

Referring to FIG. 11, the display unit 20 includes a buffer member 760, a display panel 750 disposed on the buffer member 760, a polarizing layer 730 disposed on the display panel 750, and a polarizing layer. A first transparent photosensitive film 916 disposed on 730, a PI layer 911 disposed on the first transparent photosensitive film 916, and a second transparent photosensitive film 1113 disposed on the PI layer 911 ) And a cover window 720 disposed on the second transparent photosensitive film 913. Compared with FIG. 10, in the display unit 20 of FIG. 11, a second transparent photosensitive film 1113 may include a second deformable part 1115.

The first photosensitive film 916 may include a first reinforcement part 917a, a second reinforcement part 917b, and a first deformation part 918. The thickness of the first deformation portion 918 may be thinner than the thickness t3 of the first reinforcement portion 917a or the second reinforcement portion 917b. The second photosensitive film 1113 may include a third reinforcing part 1114a, a fourth reinforcing part 1114b, and a second deforming part 1115. The thickness of the second deformable portion 1115 may be thinner than the thickness t2 of the third reinforcement portion 1114a or the fourth reinforcement portion 1114b.

According to various embodiments, the first transparent photosensitive film 916 may be disposed between the PI layer 911 and the polarizing layer 730. The first transparent photosensitive film 916 may be laminated through various processes. The transparent photosensitive film 916 is first laminated on one surface of the PI layer 911, and through a transparent plate including a mask corresponding to the deformation portion 918, a curing process in which ultraviolet rays are irradiated to the transparent photosensitive film 916, and A part of the deformed portion 918 may be removed through the developing process. The width of the groove 919 formed in the first deformation portion 918 may be narrower as it approaches one surface of the PI layer 911. According to various embodiments, the first transparent photosensitive film 916 is laminated on the polarizing layer 730, and then, a part of the deformed portion 918 may be removed through a curing and developing process by ultraviolet rays. The width of the groove 919 formed in the first deformation portion 918 may increase as it approaches one surface of the PI layer 911.

According to various embodiments, after the second transparent photosensitive film 1113 is stacked on the PI layer 911, a mask corresponding to the second deformed portion 1115 is disposed, and a curing process and a developing process by UV irradiation are performed. Through this, a part of the second transparent photosensitive film 1113 may be removed from the area corresponding to the second deformable part 1115. The thickness t2 of the third reinforcing portion 1114a or the fourth reinforcing portion 1114b may be thicker than the thickness of the second deformable portion 1115. According to various embodiments, the sum of the thicknesses of the first deformation portion 918 and the second deformation portion 1115 may be determined as a thickness capable of securing flexibility of the folding area.

According to various embodiments, the thickness t3 of the first transparent photosensitive film 916 may be formed to be equal to or thicker than the thickness t2 of the second transparent photosensitive film 1113.

When the display unit 20 is folded in an in-folding type, the thickness t3 of the first transparent photosensitive film 916 may be formed to be thinner than the thickness t2 of the second transparent photosensitive film 1113. When folded in the in-folding type, the curvature of the first transparent photosensitive film 916 may be smaller than the curvature of the second transparent photosensitive film 1113 in the folded state. For example, since the compressive force applied to the first transparent photosensitive film 916 is smaller than the compressive force applied to the second transparent photosensitive film 1113, the amount of deformation of the first deformable portion 918 may be small.

According to another embodiment, even when the display unit 20 is folded in an out-folding type, the thickness t3 of the first transparent photosensitive film 916 is formed to be thinner than the thickness t2 of the second transparent photosensitive film 1113 Can be. When folded in the out-folding type, the curvature of the first transparent photosensitive film 916 in the folded state may be greater than the curvature of the second transparent photosensitive film 1113. For example, since the tensile force applied to the first transparent photosensitive film 916 is smaller than the tensile force applied to the second transparent photosensitive film 1113, the amount of deformation of the first deformable portion 918 may be small. According to various embodiments, in a layer disposed close to the center of the display unit 20, the amount of deformation may be relatively smaller than that in other layers.

The above-described display unit 20 or the electronic device 10 including the display unit 20 may form a protective layer having a flat thickness using a transparent photosensitive film. In the bonding process of the transparent photosensitive film, a part of the transparent photosensitive film corresponding to the folding area may be removed through ultraviolet curing and development processes. According to an embodiment, the transparent photosensitive film may reinforce the strength of the display panel and the window in the first and second regions, and may secure flexibility in the folding region. According to an embodiment, the electronic device may naturally implement a change in a folded or unfolded state while preventing damage to a display or a window due to an external force in the foldable electronic device.

The display according to the various embodiments described above includes a bendable bending portion (eg, the folding area 103 of FIG. 5), and a first area extending from one side of the bending area (eg, the first A flexible display panel (e.g., a flexible display panel including an area 101) and a second area extending in a direction opposite to the first area from the other side of the bending area (eg, the second area 102 of FIG. 5) : The display panel 750 of FIG. 5, a transparent layer (eg, the transparent layer 711 of FIG. 5) disposed on the flexible display panel, and disposed on at least one surface of the transparent layer, the first region, and A transparent photosensitive film (TPF) that is cured in a region corresponding to the second region, developed in a region corresponding to the bending region, and is thinner than the first region and the second region ( Example: The transparent photosensitive film 716 of FIG. 5 may be included.

According to various embodiments, the transparent photosensitive film may include an empty space (eg, the groove 719 of FIG. 5) formed as a groove or an opening in the bending area.

According to various embodiments, the empty space may be filled with a transparent filler made of a softer material than the transparent photosensitive film (eg, the filler 725 of FIG. 8 ).

According to various embodiments, the transparent photosensitive film may be index-matched with the filler in a bending area.

According to various embodiments, the transparent photosensitive film may be disposed between the transparent layer and the display panel.

According to various embodiments, an additional transparent photosensitive film facing the transparent photosensitive film based on the transparent layer (eg, the second transparent photosensitive film 913 of FIG. 10 or the second transparent photosensitive film 1113 of FIG. 11) It may further include.

According to various embodiments, the display further includes a cover window (eg, the cover window 720 of FIG. 5) disposed on the transparent layer, wherein the transparent photosensitive film is disposed between the cover window and the transparent layer. Can be placed.

According to various embodiments, the display may include a hard coating layer disposed on the transparent photosensitive film.

According to various embodiments, a difference between the thickness of the bending region of the transparent photosensitive film and the thickness of the first region or the second region may be 5 μm to 30 μm.

According to various embodiments, the transparent layer may include a layer made of a transparent polymer material.

A foldable electronic device (eg, the electronic device 10 of FIG. 1) according to various embodiments is a foldable housing (eg, the foldable housing 500 of FIG. 1 ), which has a hinge structure and is connected to the hinge structure. , A first housing structure including a first surface facing in a first direction, and a second surface facing in a second direction opposite to the first direction (for example, the first housing structure 510 in FIG. 1), the hinge A second surface connected to the structure, including a third surface facing in a third direction, and a fourth surface facing in a fourth direction opposite to the third direction, and folding with the first housing structure with the hinge structure as an axis A housing structure (for example, the second housing structure 520 in FIG. 1 ), at least a part of a space between the first and second surfaces, and a space between the third and fourth surfaces, A foldable housing including a side member surrounding a portion, a bendable bending portion (for example, the folding area 103 in FIG. 5), and a first area extending from one side of the bending area (eg: FIG. 5), and a second region extending in a direction opposite to the first region from the other side of the bending region (for example, the second region 102 of FIG. 5). A display panel (eg, the display panel 750 of FIG. 5), a transparent layer (eg, the transparent layer 711 of FIG. 5) disposed on the flexible display panel, and a first transparent photosensitive film disposed on the transparent layer (Example: the first transparent photosensitive film 1113 of FIG. 5), and a window including a protective layer disposed on the first photosensitive film (eg, the window 720 of FIG. 5), and the first And a display (eg, the display unit 20 of FIG. 5) forming a surface and the third surface, wherein the first transparent photosensitive film corresponds to the bending area on a surface opposite to a surface in contact with the transparent layer. It may include a formed first empty space (for example, the groove 719 in FIG. 5 ).

According to various embodiments, the first empty space may be filled with a transparent filler made of a softer material than the first transparent photosensitive film (for example, the filler 719 in FIG. 8 ).

According to various embodiments, the first transparent photosensitive film may be index-matched with the filler in a bending area.

According to various embodiments, a second transparent photosensitive film disposed between the flexible display panel and the transparent layer may be included.

According to various embodiments, the second transparent photosensitive film (eg, the second transparent photosensitive film 916 of FIG. 11) is a second empty space formed to correspond to the bending area (eg, the groove 919 of FIG. 11). It may include.

According to various embodiments, the thickness of the first transparent photosensitive film may be thinner than that of the second transparent photosensitive film.

According to various embodiments, a difference between a thickness of a bending region of the first transparent photosensitive film and a thickness of the first region or the second region may be 5 μm to 30 μm.

According to various embodiments, the transparent layer may include a layer made of a polymer material.

According to various embodiments, the first and third surfaces of the display may face each other in a folded state.

According to various embodiments, the first and third surfaces of the display may be exposed to the outside in a folded state.

In the above-described specific embodiments of the present disclosure, components included in the disclosure are expressed in the singular or plural according to the presented specific embodiments. However, the singular or plural expression is selected appropriately for the situation presented for convenience of description, and the present disclosure is not limited to the singular or plural constituent elements, and even constituent elements expressed in plural are composed of the singular or in the singular. Even the expressed constituent elements may be composed of pluralities.

Meanwhile, although specific embodiments have been described in the detailed description of the present disclosure, various modifications are possible without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure is limited to the described embodiments and should not be determined, and should be determined by the scope of the claims as well as the equivalents of the claims to be described later.

710: transparent plate
711: PI layer
716: transparent photosensitive film
730: polarizing layer
750: display panel
760: cushioning member
770: shielding layer

Claims (20)

In the display,
A flexible display panel including a bendable bending portion, a first region extending from one side of the bending region, and a second region extending from the other side of the bending region in a direction opposite to the first region ;
A transparent layer disposed on the flexible display panel; And
It is disposed on at least one surface of the transparent layer, is cured in a region corresponding to the first region and the second region, and is developed in a region corresponding to the bending region, so that the first region and the second region Display comprising a; transparent photosensitive film (TPF, transparent photosensitive film) thinner than two areas.
The method of claim 1,
The transparent photosensitive film is a display including an empty space formed by a groove or an opening in the bending area.
The method of claim 2,
The empty space is filled with a transparent filler made of a softer material than the transparent photosensitive film.
The method of claim 3,
The transparent photosensitive film is index-matched with the filler in a bending area.
The method of claim 1,
The transparent photosensitive film is a display disposed between the transparent layer and the display panel.
The method of claim 1,
A display further comprising an additional transparent photosensitive film facing the transparent photosensitive film based on the transparent layer.
The method of claim 1,
The display further includes a cover window disposed on the transparent layer,
The transparent photosensitive film is a display disposed between the cover window and the transparent layer.
The method of claim 7,
The display includes a hard coating layer disposed on the transparent photosensitive film.

The method of claim 1,
A display having a thickness difference between the thickness of the bending area of the transparent photosensitive film and the thickness of the first area or the second area is 5um to 30um.
The method of claim 1,
The transparent layer is a display including a transparent polymer material layer.
In the foldable electronic device,
As a foldable housing,
Hinge structure;
A first housing structure connected to the hinge structure and including a first surface facing in a first direction and a second surface facing in a second direction opposite to the first direction;
It is connected to the hinge structure, and includes a third surface facing in a third direction, and a fourth surface facing in a fourth direction opposite to the third direction, and folding with the first housing structure with the hinge structure as an axis. A second housing structure; And
A foldable housing including a side member surrounding at least a portion of a space between the first surface and the second surface and a space between the third surface and the fourth surface; And
A flexible display panel including a bendable bending portion, a first region extending from one side of the bending region, and a second region extending from the other side of the bending region in a direction opposite to the first region , A window including a transparent layer disposed on the flexible display panel, a first transparent photosensitive film disposed on the transparent layer, and a protective layer disposed on the first photosensitive film, and the first surface and Including; a display forming the third surface,
The foldable electronic device of the first transparent photosensitive film including a first empty space formed to correspond to the bending area on a surface opposite to a surface in contact with the transparent layer.
The method of claim 11,
The foldable electronic device in which the first empty space is filled with a transparent filler made of a softer material than the first transparent photosensitive film.
The method of claim 12,
The first transparent photosensitive film is index-matched with the filler in a bending area.
The method of claim 11,
A foldable electronic device comprising a second transparent photosensitive film disposed between the flexible display panel and the transparent layer.
The method of claim 14,
The second transparent photosensitive film includes a second empty space formed to correspond to the bending area.
The method of claim 14,
The foldable electronic device having a thickness of the first transparent photosensitive film is thinner than that of the second transparent photosensitive film.
The method of claim 11,
A foldable electronic device in which a thickness difference between a thickness of the bending region of the first transparent photosensitive film and a thickness of the first region or the second region is 5 μm to 30 μm.
The method of claim 11,
The transparent layer is a foldable electronic device including a layer made of a polymer material.
The method of claim 11,
A foldable electronic device in which the first and third surfaces of the display face each other in a folded state.
The method of claim 11,
A foldable electronic device in which the first and third surfaces of the display are exposed to the outside in a folded state.

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