Patent Publication Number: US-11647595-B2

Title: Electronic apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 16/775,763, filed Jan. 29, 2020, which claims priority to and the benefit of Korean Patent Application No. 10-2019-0016264, filed Feb. 12, 2019, the entire content of both of which is incorporated herein by reference. 
    
    
     BACKGROUND 
     1. Field 
     The present disclosure herein relates to an electronic apparatus, and, more particularly, to an electronic apparatus with improved reliability. 
     2. Description of the Related Art 
     An electronic apparatus may provide an electrically activated active area to a user. A user may receive information through an image provided in the active area and/or may provide an input signal to the active area to control the electronic apparatus. 
     Typically, an electronic apparatus may display information and/or sense an external input in a designated screen. Recently, electronic apparatuses including flexible display panels and/or flexible touch panels have been developed. Unlike a flat panel, flexible panels may be foldable, rollable, or bendable like a piece of paper. The flexible panels of which shapes can be variously changed may be carried regardless of a screen size, thereby improving user convenience. 
     SUMMARY 
     Aspects of embodiments of the present disclosure are directed toward a foldable electronic apparatus with improved reliability. 
     In an embodiment of the inventive concepts, an electronic apparatus includes a display panel including a folding portion overlapping with a folding axis of the display panel, a first non-folding portion, and a second non-folding portion, the first and second non-folding portions being spaced apart from each other with the folding portion interposed therebetween, a support unit including a first support portion overlapping with the first non-folding portion and a second support portion overlapping with the second non-folding portion and spaced apart from the first support portion, an impact absorbing member interposed between the display panel and the support unit and coupled to the display panel, an adhesive member interposed between the impact absorbing member and the support unit to couple the impact absorbing member and the support unit to each other, a receiving portion defined in at least one of the first support portion or the second support portion, and a protrusion connected to the impact absorbing member and arranged in the receiving portion. A planar area of the protrusion is less than a planar area of the receiving portion. 
     In an embodiment, the adhesive member may include a pressure sensitive adhesive (PSA). 
     In an embodiment, the protrusion may have a circular shape when viewed in a plan view. 
     In an embodiment, the protrusion may be spaced apart from an inner sidewall of the receiving portion. 
     In an embodiment, the protrusion may have a bar shape extending in one direction when viewed in a plan view. 
     In an embodiment, the protrusion may be in contact with an inner sidewall of the receiving portion in the one direction and may be spaced apart from an inner sidewall of the receiving portion in another direction crossing or intersecting the one direction. 
     In an embodiment, the electronic apparatus may further include an elastic member arranged in the receiving portion and interposed between the protrusion and an inner sidewall of the receiving portion. 
     In an embodiment, the elastic member may have an elastic force higher than that of the protrusion. 
     In an embodiment, the protrusion may be connected directly to the impact absorbing member. 
     In an embodiment, the protrusion may penetrate the adhesive member. 
     In an embodiment, the support unit may further include a hinge portion overlapping with the folding portion and connecting the first support portion and the second support portion. The first support portion and the second support portion may be foldable about the hinge portion. 
     In an embodiment, the adhesive member may be spaced apart from the hinge portion when viewed in a plan view. 
     In an embodiment, the impact absorbing member may be lower in elastic modulus than that of the support unit. 
     In an embodiment of the inventive concepts, an electronic apparatus includes a display panel including a folding portion overlapping with a folding axis of the display panel, a first non-folding portion, and a second non-folding portion, the first and second non-folding portions being spaced apart from each other with the folding portion interposed therebetween and connected to the folding portion, a support unit including a first support portion arranged under the first non-folding portion and a second support portion arranged under the second non-folding portion and spaced apart from the first support portion, an impact absorbing member interposed between the display panel and the support unit and coupled to the display panel, an adhesive member interposed between the impact absorbing member and the support unit to couple the impact absorbing member and the support unit to each other, and a guide portion arranged on each of the first and second support portions. The guide portion is spaced apart from the display panel and the adhesive member when viewed in a plan view. 
     In an embodiment, the guide portion may have a bar shape facing an edge of the display panel and extending in a direction parallel to the edge, when viewed in a plan view. 
     In an embodiment, the guide portion may have a shape which is spaced apart from a vertex of the display panel and is bent to surround two edges of the display panel, when viewed in a plan view. 
     In an embodiment, the guide portion may be provided in plurality, and the guide portions may be arranged along edges of the display panel. 
     In an embodiment, the support unit may further include a hinge portion overlapping with the folding portion and connecting the first support portion and the second support portion. The adhesive member may not overlap with the hinge portion when viewed in a plan view. 
     In an embodiment, the adhesive member may include a pressure sensitive adhesive (PSA). 
     In an embodiment, the impact absorbing member may be lower in elastic modulus than that of the support unit. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee. 
       The accompanying drawings are included to provide a further understanding of the inventive concepts, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the inventive concepts and, together with the description, serve to explain principles of the inventive concepts. In the drawings: 
         FIGS.  1 A and  1 B  are perspective views illustrating an electronic apparatus according to an embodiment of the inventive concepts; 
         FIG.  2 A  is an exploded perspective view illustrating an electronic apparatus according to an embodiment of the inventive concepts; 
         FIG.  2 B  is a cross-sectional view illustrating some components of  FIG.  2 A ; 
         FIG.  3 A  is a plan view illustrating an assembled electronic apparatus according to an embodiment of the inventive concepts; 
         FIG.  3 B  is a cross-sectional view taken along a line I-I′ of  FIG.  3 A ; 
         FIG.  4    is a plan view of a component illustrated in  FIG.  3 A ; 
         FIGS.  5 A and  5 B  are plan views illustrating an electronic apparatus according to an embodiment of the inventive concepts; 
         FIG.  5 C  is a cross-sectional view taken along a line II-II′ of  FIG.  5 A ; 
         FIG.  5 D  is a cross-sectional view taken along a line III-III′ of  FIG.  5 B ; 
         FIGS.  6 A and  6 B  are plan views schematically illustrating a component of an electronic apparatus according to some embodiments of the inventive concepts; 
         FIGS.  7 A to  7 C  are plan views schematically illustrating some components of an electronic apparatus according to some embodiments of the inventive concepts; 
         FIGS.  8 A and  8 B  are plan views illustrating electronic apparatuses according to some embodiments of the inventive concepts; 
         FIGS.  9 A to  9 C  are cross-sectional views illustrating electronic apparatuses according to some embodiments of the inventive concepts; 
         FIG.  10 A  is an exploded perspective view illustrating an electronic apparatus according to an embodiment of the inventive concepts; 
         FIGS.  10 B and  10 C  are plan views illustrating electronic apparatuses according to some embodiments of the inventive concepts; 
         FIG.  10 D  is a cross-sectional view of the electronic apparatus illustrated in  FIG.  10 A ; 
         FIGS.  11 A to  12 B  are images showing portions of electronic apparatuses according to comparative examples of the inventive concepts; and 
         FIGS.  13 A and  13 B  are images showing a portion of an electronic apparatus according to an embodiment of the inventive concepts. 
     
    
    
     DETAILED DESCRIPTION 
     The inventive concepts now will be described more fully hereinafter with reference to the accompanying drawings, in which various embodiments are shown. The inventive concepts may, however, be embodied in many different forms, and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scopes of the inventive concepts to those skilled in the art. Like reference numerals refer to like elements throughout. 
     It will be understood that when an element such as a layer, region, or substrate is referred to as being “on” another element, it can be directly on the other element or intervening elements may be present. In contrast, the term “directly” means that there are no intervening elements. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms, including “at least one,” unless the content clearly indicates otherwise. “Or” means “and/or.” It will be further understood that the terms “comprises” and/or “comprising,” or “includes” and/or “including,” when used in this specification specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof. 
     Spatially relative terms, such as “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature&#39;s relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the exemplary term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. 
     It will be understood that, although the terms first, second, etc., may be used herein to describe various elements, components, regions, layers, and/or sections, these elements, components, regions, layers, and/or sections should not be limited by these terms. These terms are used only to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, a first element, component, region, layer, or section discussed below could be termed a second element, component, region, layer, or section without departing from the teachings herein. Further, the use of “may” when describing embodiments of the inventive concept refers to “one or more embodiments of the inventive concept.” Also, the term “exemplary” is intended to refer to an example or illustration. 
     It will be understood that when an element or layer is referred to as being “on,” “connected to,” “coupled to,” or “adjacent to” another element or layer, it can be directly on, connected to, coupled to, or adjacent to the other element or layer, or one or more intervening elements or layers may be present. In contrast, when an element or layer is referred to as being “directly on,” “directly connected to,” “directly coupled to,” or “immediately adjacent to” another element or layer, there are no intervening elements or layers present. 
     As used herein, the terms “substantially,” “about,” “approximately,” and similar terms are used as terms of approximation and not as terms of degree, and are intended to account for the inherent deviations in measured or calculated values that would be recognized by those of ordinary skill in the art. Further, “about” or “approximately” as used herein is inclusive of the stated value and means within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art, considering the measurement in question and the error associated with measurement of the particular quantity (i.e., the limitations of the measurement system). 
     Exemplary embodiments are described herein with reference to cross-sectional illustrations and/or plane illustrations that are idealized exemplary illustrations. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Accordingly, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etching region illustrated as a rectangle will, typically, have rounded or curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of exemplary embodiments. 
     Hereinafter, exemplary embodiments of the inventive concepts will be described in more detail with reference to the accompanying drawings. 
       FIGS.  1 A and  1 B  are perspective views illustrating an electronic apparatus according to an embodiment of the inventive concepts. An electronic apparatus EA may display an image IM in response to an electrical signal. The electronic apparatus EA may include a display unit DU and a support unit PT. 
     The display unit DU may include a front surface FS on which the image IM is displayed. The front surface FS may include an active area AA and a peripheral area NAA. The active area AA may be an area in which light emitting elements activated in response to electrical signals are disposed, and the image IM may be displayed in the active area AA. The peripheral area NAA may be adjacent to the active area AA. Various kinds of signal lines and/or driving elements for providing electrical signals transmitted to the active area AA may be disposed in the peripheral area NAA. 
     The support unit PT may be coupled to the display unit DU to support the display unit DU. The support unit PT may include a first support portion P 1 , a second support portion P 2 , and a hinge portion LP. The first support portion P 1  may be coupled to a rear surface of a portion of the display unit DU to support the display unit DU. The second support portion P 2  may be coupled to a rear surface of another portion of the display unit DU to support the display unit DU. 
     The hinge portion LP may be disposed between the first support portion P 1  and the second support portion P 2  and may connect the first and second support portions P 1  and P 2  to each other. The hinge portion LP may support a remaining portion of the display unit DU. 
     Also, the electronic apparatus EA may be folded or unfolded about a folding axis FX, as illustrated in  FIGS.  1 A and  1 B . In the present embodiment, for the purpose of ease and convenience in description and illustration, the electronic apparatus EA in an unfolded state is illustrated in  FIG.  1 A  and an electronic apparatus EA-F in a folded state is illustrated in  FIG.  1 B . 
     The folding axis FX may extend in a second direction DR 2 . In the electronic apparatus in the unfolded state, the folding axis FX may be defined at a position overlapping with the hinge portion LP of the support unit PT in a plan view. In the support unit PT, the first support portion P 1  and the second support portion P 2  may be fluidly coupled to the hinge portion LP. In more detail, the first support portion P 1  and the second support portion P 2  may be rotatable about the hinge portion LP. 
     In one embodiment, the display unit DU should have flexibility. The display unit DU may be folded or unfolded about the folding axis FX due to the flexibility. When the electronic apparatus EA is unfolded or folded, the shape of the display unit DU may be deformed by substantially the support unit PT. 
       FIG.  2 A  is an exploded perspective view illustrating an electronic apparatus according to an embodiment of the inventive concepts.  FIG.  2 B  is a cross-sectional view illustrating some components of  FIG.  2 A .  FIG.  3 A  is a plan view illustrating an assembled electronic apparatus according to an embodiment of the inventive concepts.  FIG.  3 B  is a cross-sectional view taken along a line I-I′ of  FIG.  3 A .  FIG.  4    is a plan view of a component illustrated in  FIG.  3 A .  FIG.  2 B  illustrates a cross-sectional view of an embodiment of the display unit DU for the purpose of ease and convenience in description. Hereinafter, an embodiment of the inventive concepts will be described in more detail with reference to  FIGS.  2 A to  4   . 
     As illustrated in  FIG.  2 A , the display unit DU may include a display panel DP, a first adhesive member A 1 , an impact absorbing member ABS, and a second adhesive member A 2 . 
     The display panel DP may be a component which substantially displays the image IM. The front surface FS may mean a front surface of the display panel DP. The display panel DP may be activated by electrical signals to display the image IM and may be variously embodied. For example, the display panel DP may include, but is not limited to, an organic light emitting display panel, a quantum-dot display panel, an electrophoretic display panel, an electrowetting display panel, or a liquid crystal display panel. 
     Referring to  FIG.  2 B , the display panel DP may include a base substrate BS, a transistor TR, a light emitting element EE, and a plurality of insulating layers  10 ,  20 ,  30 ,  40 , and  50 . The insulating layers  10 ,  20 ,  30 ,  40 , and  50  may include first to fifth insulating layers  10 ,  20 ,  30 ,  40 , and  50  sequentially stacked in a third direction DR 3  (e.g., the thickness direction of the display panel DP). 
     For example, the base substrate BS may include a plastic substrate, a glass substrate, or a metal substrate. The plastic substrate may include a resin. For example, the base substrate BS may include at least one of an acrylic-based resin, a methacrylic-based resin, polyisoprene, a vinyl-based resin, an epoxy-based resin, a urethane-based resin, a cellulose-based resin, a siloxane-based resin, a polyimide-based resin, a polyamide-based resin, or a perylene-based resin. 
     The transistor TR may be disposed on the base substrate BS. The transistor TR and the light emitting element EE may constitute a pixel PX. The transistor TR may include a semiconductor pattern SP, a control electrode CE, an input electrode IE, and an output electrode OE. The semiconductor pattern SP may include a semiconductor material. For example, the semiconductor pattern SP may include at least one of a group  4  element, a group  8  element, or a metal oxide. 
     The control electrode CE may be disposed on the first insulating layer  10 . The control electrode CE may overlap with the semiconductor pattern SP in a plan view and may be spaced apart from the semiconductor pattern SP. The control electrode CE may be spaced apart from the semiconductor pattern SP with the first insulating layer  10  interposed therebetween. However, embodiments of the inventive concepts are not limited thereto. In a transistor TR according to another embodiment, the semiconductor pattern SP may be disposed on the control electrode CE. 
     The input electrode IE and the output electrode OE may be disposed on the second insulating layer  20 . The input electrode IE and the output electrode OE may be spaced apart from each other when viewed in a plan view. Each of the input electrode IE and the output electrode OE may penetrate the second insulating layer  20  and the first insulating layer  10  so as to be connected to the semiconductor pattern SP. 
     However, embodiments of the inventive concepts are not limited thereto. In a transistor TR according to certain embodiments, the input electrode IE and the output electrode OE may be disposed under the semiconductor pattern SP or may be disposed between the control electrode CE and the semiconductor pattern SP. Alternatively, the input electrode IE and the output electrode OE may be disposed on the same layer as the semiconductor pattern SP and may be in direct contact with the semiconductor pattern SP. The transistor TR according to embodiments of the inventive concepts may have any one of various structures and is not limited to a specific embodiment. 
     The light emitting element EE may be disposed on the third insulating layer  30 . The light emitting element EE may include a first electrode E 1 , an emission pattern EP, and a second electrode E 2 . The first electrode E 1  may be disposed on the third insulating layer  30  and may penetrate the third insulating layer  30  so as to be connected to the output electrode OE of the transistor TR. Also, even though not shown in the drawings, the display panel DP may further include a connection electrode disposed between the first electrode E 1  and the transistor TR. In this case, the first electrode E 1  may be electrically connected to the transistor TR through the connection electrode. 
     An opening  40 -OP may be defined in the fourth insulating layer  40 . The opening  40 -OP may expose at least a portion of the first electrode E 1 . In the present embodiment, the fourth insulating layer  40  may be a pixel defining layer. 
     The emission pattern EP may be disposed in the opening  40 -OP and may be disposed on the first electrode E 1  exposed by the opening  40 -OP. The emission pattern EP may include a light emitting material. For example, the emission pattern EP may include at least one of materials capable of emitting red light, green light, and/or blue light. In an embodiment, the emission pattern EP may include a fluorescent material and/or a phosphorescent material. The emission pattern EP may include an organic light emitting material and/or an inorganic light emitting material. The emission pattern EP may emit light in response to a potential difference between the first electrode E 1  and the second electrode E 2 . 
     The second electrode E 2  may be disposed on the emission pattern EP. The second electrode E 2  may be opposite to the first electrode E 1 . The second electrode E 2  may have a single unitary body shape in the active area AA. Thus, the second electrode E 2  may be provided in common in a plurality of the pixels. The light emitting element EE disposed in each of the pixels may receive a common power source voltage through the second electrode E 2 . 
     The second electrode E 2  may include a transparent conductive material or a semi-transparent conductive material. Thus, light generated from the emission pattern EP may easily exit in the third direction DR 3  through the second electrode E 2 . However, embodiments of the inventive concepts are not limited thereto. In another embodiment, the first electrode E 1  may include a transparent or semi-transparent conductive material, and the light emitting element EE may be driven as a rear surface light emitting type. In still another embodiment, the light emitting element EE may be driven as a both surface light emitting type in which light exits through a front surface and a rear surface. 
     The fifth insulating layer  50  may be disposed on the light emitting element EE to encapsulate the light emitting element EE. In the present embodiment, the fifth insulating layer  50  may be an encapsulation layer. The fifth insulating layer  50  may have a single unitary body shape in the active area AA. Thus, the fifth insulating layer  50  may be provided in common in the plurality of pixels. Also, in some embodiments, a capping layer covering the second electrode E 2  may be disposed between the second electrode E 2  and the fifth insulating layer  50 . 
     The fifth insulating layer  50  may include a first inorganic layer  51 , an organic layer  52  and a second inorganic layer  53 , which are sequentially stacked in the third direction DR 3 . In the present embodiment, each of the first inorganic layer  51 , the organic layer  52 , and the second inorganic layer  53  is illustrated as a single layer. However, embodiments of the inventive concepts are not limited thereto. In certain embodiments, at least one of the first inorganic layer  51 , the organic layer  52 , or the second inorganic layer  53  may be provided in plurality or may be omitted. 
     The first inorganic layer  51  may cover the second electrode E 2 . The first inorganic layer  51  may prevent external moisture and/or oxygen from permeating into the light emitting element EE. For example, the first inorganic layer  51  may include silicon nitride, silicon oxide, silicon oxynitride, or a combination thereof. The first inorganic layer  51  may be formed by a deposition process. 
     The organic layer  52  may be disposed on the first inorganic layer  51  and may be in contact with the first inorganic layer  51 . The organic layer  52  may provide a flat surface on the first inorganic layer  51 . For example, the organic layer  52  may provide the flat surface in the active area AA. 
     The organic layer  52  may cover a bent portion of a top surface of the first inorganic layer  51  and/or a particle existing on the first inorganic layer  51 , and thus it is possible to block the influence of the state of the top surface of the first inorganic layer  51  on components formed on the organic layer  52 . In addition, the organic layer  52  may relax or release stress between layers in contact with the organic layer  52 . The organic layer  52  may include an organic material and may be formed by a solution process such as a spin coating process, a slit coating process, and/or an inkjet process. 
     The second inorganic layer  53  may be disposed on the organic layer  52  to cover the organic layer  52 . The second inorganic layer  53  may be stably formed on the top surface of the organic layer  52 , which is relatively flat as compared with the top surface of the first inorganic layer  51 . The second inorganic layer  53  may encapsulate moisture outputted or evaporated from the organic layer  52  to prevent or block the moisture from being provided (or escaping) to the outside. For example, the second inorganic layer  53  may include silicon nitride, silicon oxide, silicon oxynitride, or a combination thereof. The second inorganic layer  53  may be formed by a deposition process. 
     However, embodiments of the inventive concepts are not limited thereto. In another embodiment, the fifth insulating layer  50  may be provided as a single layer in the display panel DP. 
     Referring again to  FIG.  2 A , the display panel DP may include a folding portion FBP, a first non-folding portion NFP 1 , and a second non-folding portion NFP 2 , when viewed in a plan view. The folding portion FBP may overlap with the folding axis FX (see  FIG.  1 A ), and a shape of the folding portion FBP may be deformed when the electronic apparatus EA is in the folded state. In an embodiment, when the electronic apparatus EA is in the folded state, folding stress including compressive stress and tensile stress may be applied to the folding portion FBP. 
     The first non-folding portion NFP 1  and the second non-folding portion NFP 2  may be disposed at both sides (e.g., lateral or opposite sides) of the folding portion FBP, respectively. The first non-folding portion NFP 1  and the second non-folding portion NFP 2  may be spaced apart from each other in a first direction DR 1  with the folding portion FBP interposed therebetween. The first and second non-folding portions NFP 1  and NFP 2  may be connected to the folding portion FBP, and the first and second non-folding portions NFP 1  and NFP 2  and the folding portion FBP may constitute a single unitary body shape (e.g., a single integral body). 
     The impact absorbing member ABS may be disposed between the display panel DP and the support unit PT. The impact absorbing member ABS may reduce the intensity of an external impact transmitted to the display panel DP through the support unit PT. The impact absorbing member ABS may have a modulus lower than that of the first support portion P 1  or the second support portion P 2 . Here, the modulus refers to an elastic modulus that is a ratio between stress and strain. Elastic moduli can be, e.g., of three types, Young&#39;s modulus, Shear modulus, and Bulk modulus, that specify how stress and strain are to be measured. 
     The first adhesive member A 1  may be disposed between the impact absorbing member ABS and the display panel DP to physically couple the impact absorbing member ABS and the display panel DP to each other. The first adhesive member A 1  may have adhesiveness. For example, the first adhesive member A 1  may include a pressure sensitive adhesive (PSA). 
     The first adhesive member A 1  may include a first adhesive portion A 11  and a second adhesive portion A 12 . The first adhesive portion A 11  and the second adhesive portion A 12  may be spaced apart from each other in the first direction DR 1 . The first adhesive portion A 11  may couple the first non-folding portion NFP 1  of the display panel DP and the impact absorbing member ABS to each other. The second adhesive portion A 12  may couple the second non-folding portion NFP 2  of the display panel DP and the impact absorbing member ABS to each other. 
     The second adhesive member A 2  may be disposed between the impact absorbing member ABS and the support unit PT to physically couple the impact absorbing member ABS and the support unit PT to each other. The second adhesive member A 2  may have adhesiveness. For example, the second adhesive member A 2  may include a pressure sensitive adhesive (PSA). 
     The second adhesive member A 2  may include a third adhesive portion A 21  and a fourth adhesive portion A 22 . The third adhesive portion A 21  and the fourth adhesive portion A 22  may be spaced apart from each other in the first direction DR 1 . The third adhesive portion A 21  may couple the first support portion P 1  of the support unit PT and the impact absorbing member ABS to each other. The fourth adhesive portion A 22  may couple the second support portion P 2  of the support unit PT and the impact absorbing member ABS to each other. 
     Referring to  FIG.  3 B , the folding portion FBP of the display panel DP and the hinge portion LP of the support unit PT may not overlap with the first and second adhesive members A 1  and A 2  when viewed in a plan view. The folding portion FBP and the hinge portion LP may not be coupled to the first and second adhesive members A 1  and A 2 . 
     According to an embodiment of the inventive concepts, the first and second adhesive members A 1  and A 2  may be removed from an area overlapping with the folding axis FX, and thus a thickness of the electronic apparatus EA in an area overlapping with the folding portion FBP may be less than thicknesses of the electronic apparatus EA in areas overlapping with the first and second non-folding portions NFP 1  and NFP 2 . As a result, the folding stress affecting the folding portion FBP and the hinge portion LP may be reduced. 
     Also, at least one receiving portion RC may be defined in the support unit PT according to an embodiment of the inventive concepts. In the present embodiment, two receiving portions RC are defined in the first support portion P 1 , and two receiving portions RC are defined in the second support portion P 2 . 
     The receiving portion RC may receive a protrusion CN. The protrusion CN may penetrate the second adhesive member A 2  so as to be connected to the impact absorbing member ABS. The protrusion CN may protrude from a bottom surface of the impact absorbing member ABS and may be received in the receiving portion RC. The protrusion CN and the impact absorbing member ABS may constitute a single unitary body shape. Alternatively, the protrusion CN may be physically connected to the impact absorbing member ABS like a bolt or may be physically connected to the impact absorbing member ABS through an adhesive member. 
     The protrusion CN may be provided in plurality, and the protrusions CN may be received in the receiving portions RC, respectively. As illustrated in  FIG.  4   , a planar size of the protrusion CN may be less than a planar size of the receiving portion RC. Thus, the protrusion CN may be laterally movable by a set or predetermined distance GP in the receiving portion RC. According to the embodiment of the inventive concepts, since the protrusion CN is coupled to the impact absorbing member ABS, lateral movement of the impact absorbing member ABS and the display panel DP physically coupled to the impact absorbing member ABS may be controlled. Thus, excessive lateral movement of the display unit DU by an external impact may be controlled. 
       FIGS.  5 A and  5 B  are plan views illustrating an electronic apparatus according to an embodiment of the inventive concepts.  FIG.  5 C  is a cross-sectional view taken along a line II-II′ of  FIG.  5 A , and  FIG.  5 D  is a cross-sectional view taken along a line III-III′ of  FIG.  5 B . For the purpose of ease and convenience in description,  FIG.  5 A  illustrates the electronic apparatus EA to which an external impact is not applied, and  FIG.  5 B  illustrates an electronic apparatus EA-P to which an external impact is applied. Hereinafter, an embodiment of the inventive concepts will be described with reference to  FIGS.  5 A to  5 D . 
     As illustrated in  FIGS.  5 A and  5 B , when an external impact PS is applied in an arrow direction ( FIG.  5 A ), the electronic apparatus EA may be deformed into a bent electronic apparatus EA-P. For example, the second support portion P 2  may be moved from the first support portion P 1  by the external impact PS in the direction in which the external impact PS is applied. In the present embodiment, bent deformation may occur at the support unit PT by a difference in movement between the first support portion P 1  and the second support portion P 2 . 
     The shape of the bent electronic apparatus EA-P ( FIG.  5 B ) may be generated by substantially the bent support unit PT-P (from the shape of the electronic apparatus EA in  FIG.  5 B ). The shape of the bent support unit PT-P may be generated because the first support portion P 1  or the second support portion P 2  is instantaneously moved by the external impact PS by a clearance inherent in the electronic apparatus EA, for example, by a clearance according to an assembly tolerance between the hinge portion LP and the first support portion P 1  or between the hinge portion LP and the second support portion P 2 . 
     Referring to  FIG.  5 C , before the external impact PS is applied, the protrusion CN may be received in the receiving portion RC in the electronic apparatus EA. At this time, the protrusion CN may be disposed at a center of the receiving portion RC. 
     Referring to  FIG.  5 D , when the external impact PS is applied, the bent electronic apparatus EA-P may be concurrently or instantaneously deformed such that the second support portion P 2  is relatively moved from the first support portion P 1  in the second direction DR 2 . At this time, the display panel DP may be fixed in place due to inertia, and set or predetermined deformation GS may occur at the second adhesive member A 2 . The deformation GS of the second adhesive member A 2  may correspond to substantially a movement distance of the second support portion P 2  in the second direction DR 2  with respect to the first support portion P 1 . 
     At this time, the protrusion CN may be in contact with an inner sidewall of the receiving portion RC. The protrusion CN may be connected to the impact absorbing member ABS and may be substantially physically connected to the display panel DP. Since the protrusion CN is received in the receiving portion RC, a movement distance of the display unit DU in a plan view may be controlled in the size of the receiving portion RC. 
     According to the embodiment of the inventive concepts, even though the laterally bent deformation occurs at the support unit PT by the external impact PS, the display panel DP may be independent of the support unit PT-P, and thus damage of the display panel DP may be reduced or prevented. In addition, according to the embodiment of the inventive concepts, the protrusion CN may be received in the receiving portion RC, and thus excessive deformation of the support unit PT may be easily reduced or prevented. As a result, reliability of the electronic apparatus EA may be improved. 
       FIGS.  6 A and  6 B  are plan views schematically illustrating a component of an electronic apparatus according to some embodiments of the inventive concepts.  FIGS.  7 A to  7 C  are plan views schematically illustrating some components of an electronic apparatus according to some embodiments of the inventive concepts. Protrusions and receiving portions are illustrated in  FIGS.  6 A to  7 C . Hereinafter, embodiments of the inventive concepts will be described with reference to  FIGS.  6 A to  7 C . 
     As illustrated in  FIGS.  6 A and  6 B , a receiving portion RC 1  may have another shape other than a circular shape as illustrated above. Here, the receiving portion RC 1  may have a quadrilateral shape of which vertexes are round. As illustrated in  FIG.  6 A , a protrusion CN 1 A may be provided in a shape having a length extending in the second direction DR 2 . The protrusion CN 1 A may be in contact with an upper side and a lower side of the receiving portion RC 1  when viewed in a plan view. Thus, lateral movement of the protrusion CN 1 A in a direction parallel to the second direction DR 2  may be relatively fixed, and lateral movement of the protrusion CN 1 A in a direction parallel to the first direction DR 1  may be relatively fluidly controlled. 
     Alternatively, as illustrated in  FIG.  6 B , a protrusion CN 1 B may be provided in a shape having a length extending in the first direction DR 1 . The protrusion CN 1 B may be in contact with a left side and a right side of the receiving portion RC 1  when viewed in a plan view. Thus, lateral movement of the protrusion CN 1 B in a direction parallel to the first direction DR 1  may be relatively fixed, and lateral movement of the protrusion CN 1 B in a direction parallel to the second direction DR 2  may be relatively fluidly controlled. 
     Referring to  FIGS.  6 A and  6 B , the lateral movement of the protrusion CN 1 A or CN 1 B may be controlled as one-directional movement in the direction parallel to the first direction DR 1  or the direction parallel to the second direction DR 2 . As a result, the shape of the protrusion CN 1 A or CN 1 B and/or the shape of the receiving portion RC 1  may be controlled depending on a direction of an external impact applied to the electronic apparatus, and thus the reliability of the electronic apparatus may be improved. 
     As illustrated in  FIGS.  7 A and  7 B , an electronic apparatus according to some embodiments of the inventive concepts may further include an elastic member ELA or ELB. The elastic member ELA or ELB may include a material having high elastic force, e.g., a spring, a sponge, or a damper. The elastic member ELA or ELB may be disposed in an empty space between the protrusion CN 1 A or CN 1 B and the receiving portion RC 1  to control movement of the protrusion CN 1 A or CN 1 B. 
     For example, as illustrated in  FIG.  7 A , the elastic member ELA may be provided in plurality, and the elastic members ELA may be disposed in the empty space between the protrusion CN 1 A and the receiving portion RC 1 . The elastic members ELA may be disposed between the left side of the receiving portion RC 1  and the protrusion CN 1 A and between the right side of the receiving portion RC 1  and the protrusion CN 1 A, respectively. Thus, left and right movement of the protrusion CN 1 A may be relatively reduced, as compared with the protrusion CN 1 A illustrated in  FIG.  6 A . 
     Alternatively, as illustrated in  FIG.  7 B , the elastic member ELB may be provided in plurality, and the elastic members ELB may be disposed in the empty space between the protrusion CN 1 B and the receiving portion RC 1 . The elastic members ELB may be disposed between the upper side of the receiving portion RC 1  and the protrusion CN 1 B and between the lower side of the receiving portion RC 1  and the protrusion CN 1 B, respectively. Thus, up and down movement of the protrusion CN 1 B in a plan view may be relatively reduced, as compared with the protrusion CN 1 B illustrated in  FIG.  6 B . 
     In certain embodiments, an elastic member ELs may be disposed in a receiving portion RC having a circular shape, as illustrated in  FIG.  7 C . Substantially, the elastic member ELs may be disposed in an empty space between the receiving portion RC and the protrusion CN, illustrated in  FIG.  4   . In the present embodiment, four elastic members ELs may be provided between the protrusion CN and the inner sidewall of the receiving portion RC, and thus up, down, left and right movement of the protrusion CN may be relatively reduced, as compared with the protrusion CN illustrated in  FIG.  4   . 
       FIGS.  8 A and  8 B  are plan views illustrating electronic apparatuses according to some embodiments of the inventive concepts.  FIGS.  8 A and  8 B  illustrate areas corresponding to  FIG.  3 A  for the purpose of ease and convenience in description. Hereinafter, some embodiments of the inventive concepts will be described with reference to  FIGS.  8 A and  8 B . In addition, the same components as described with reference to  FIGS.  1 A to  7 C  will be indicated by the same reference designators, and the descriptions thereof will not be provided again for the purpose of ease and convenience in description and understanding. 
     As illustrated in  FIG.  8 A , the numbers of receiving portions RC and protrusions CN in an electronic apparatus EA-A may be more than the numbers of the receiving portions RC and the protrusions CN in the electronic apparatus EA illustrated in  FIG.  3 A . Sizes of the receiving portion RC and the protrusion CN may be different from the sizes of the receiving portion RC and the protrusion CN of  FIG.  3 A . However, embodiments of the inventive concepts are not limited thereto. 
     As illustrated in  FIG.  8 B , a receiving portion RC 2  may be provided in a bar or groove shape having a length extending in the second direction DR 2 . A protrusion CN 2  may be provided in a bar shape having a length extending in the second direction DR 2  such that the shape of the protrusion CN 2  corresponds to (e.g., matches) the shape of the receiving portion RC 2 . A length and a width of the protrusion CN 2  may be designed in such a way that a separation distance between the protrusion CN 2  and the receiving portion RC 2  in the first direction DR 1  is equal to a separation distance between the protrusion CN 2  and the receiving portion RC 2  in the second direction DR 2 . Thus, lateral movement of the display unit DU by an external impact applied to an electronic apparatus EA-B may be easily controlled, and reliability of the electronic apparatus EA-B may be improved. 
       FIGS.  9 A to  9 C  are cross-sectional views illustrating electronic apparatuses according to some embodiments of the inventive concepts.  FIGS.  9 A to  9 C  illustrate areas corresponding to  FIG.  3 B  for the purpose of ease and convenience in description. Hereinafter, embodiments of the inventive concepts will be described with reference to  FIGS.  9 A to  9 C . In addition, the same components as described with reference to  FIGS.  1 A to  8 B  will be indicated by the same reference designators, and the descriptions thereof will be omitted for the purpose of ease and convenience in description and illumination. 
     As illustrated in  FIG.  9 A , in an electronic apparatus EA-C, a support unit PT 1  may include the first support portion P 1  and the second support portion P 2 . In the support unit PT 1 , the hinge portion LP of  FIG.  3 B  may be omitted. Thus, areas of the display unit corresponding to the non-folding portions NFP 1  and NFP 2  (see  FIG.  2 A ) of the display panel DP may be supported by the support unit PT 1 , but an area of the display unit corresponding to the folding portion FBP (see  FIG.  2 A ) may not overlap with the support unit PT 1  when viewed in a plan view. 
     As illustrated in  FIGS.  9 B and  9 C , in an electronic apparatus EA-D or EA-E, an impact absorbing member ABS 1  or ABS 2  may include a plurality of layers. For example, as illustrated in  FIG.  9 B , the electronic apparatus EA-D may include the impact absorbing member ABS 1  including a first layer L1 and a second layer L2. The protrusion CN may be connected to the first layer L1. 
     Alternatively, as illustrated in  FIG.  9 C , the electronic apparatus EA-E may include the impact absorbing member ABS 2  including a first layer L1, a second layer L2 and a third layer L3, which are sequentially stacked in the third direction DR 3 . The protrusion CN may be connected to the first layer L1. 
     Since the impact absorbing member ABS 1  or ABS 2  includes the plurality of layers, characteristics of reducing or relaxing an impact thereof may be improved. As a result, an impact transmitted to the display panel DP through the support unit PT 1  may be reduced to improve stability of the display panel DP. 
     In addition, since the impact absorbing member ABS 1  or ABS 2  includes the plurality of layers, folding stress may be dispersed in the layers. Thus, folding characteristics of the impact absorbing member ABS 1  or ABS 2  may be improved as compared with the case in which the impact absorbing member is a single layer. 
       FIG.  10 A  is an exploded perspective view illustrating an electronic apparatus according to an embodiment of the inventive concepts.  FIGS.  10 B and  10 C  are plan views illustrating electronic apparatuses according to some embodiments of the inventive concepts.  FIG.  10 D  is a cross-sectional view of the electronic apparatus illustrated in  FIG.  10 A .  FIG.  10 B  illustrates a plan view of the electronic apparatus EA- 1  illustrated in  FIG.  10 A , and  FIG.  10 C  illustrates a plan view of an electronic apparatus EA- 2  according to an embodiment of the inventive concepts.  FIG.  10 D  is a cross-sectional view taken along a line IV-IV′ of  FIG.  10 B . Hereinafter, embodiments of the inventive concepts will be described with reference to  FIGS.  10 A to  10 D . 
     As illustrated in  FIGS.  10 A,  10 B, and  10 D , the electronic apparatus EA- 1  may further include a guide portion DM. The guide portion DM may be disposed on the support unit PT. For example, the guide portion DM may be disposed on each of the first and second support portions P 1  and P 2 . The guide portion DM may be spaced apart from the display unit DU when viewed in a plan view. The guide portion DM may be disposed at a position surrounding each of four vertexes of the display unit DU. 
     In the present embodiment, the guide portion DM may control lateral movement of the display unit DU to be within a set or predetermined range. For example, the guide portion DM may be spaced apart from the display unit DU by a first distance GP- 11  in the first direction DR 1  and may be spaced apart from the display unit DU by a second distance GP- 12  in the second direction DR 2 . As illustrated in  FIG.  10 D , the guide portion DM may have a height equal to a thickness of the display unit DU. Thus, undesired movement of the display unit DU (e.g., the display panel DP) may be stably blocked or prevented. However, embodiments of the inventive concepts are not limited thereto. In another embodiment, the height of the guide portion DM may be less than the thickness of the display unit DU. 
     According to the embodiment of the inventive concepts, even though a clearance occurs between the first support portion P 1  and the second support portion P 2  by an external impact, lateral movement of the display unit DU may be controlled in the first distance GP- 11  or the second distance GP- 12 , thereby reducing or preventing damage of the display unit DU. 
     Alternatively, in the electronic apparatus EA- 2 , a shape of a guide portion DM 1  may be variously modified, as illustrated in  FIG.  10 C . The guide portion DM 1  may be provided in plurality, and the guide portions DM 1  may have bar shapes extending along edges of the display unit DU. Thus, damage of the display unit DU by an external impact may be reduced or prevented, and reliability of the electronic apparatus EA- 2  may be improved. 
       FIGS.  11 A and  11 B  are images showing a portion of an electronic apparatus according to a comparative example of the inventive concepts.  FIGS.  12 A and  12 B  are images showing a portion of an electronic apparatus according to a comparative example of the inventive concepts.  FIGS.  13 A and  13 B  are images showing a portion of an electronic apparatus according to an embodiment of the inventive concepts. An electronic apparatus EX shown in  FIGS.  13 A and  13 B  may correspond to the electronic apparatus EA- 1  illustrated in  FIG.  10 A . 
       FIGS.  11 A to  13 B  are images showing degrees of deformation of insulating (e.g., encapsulation) layers  50  (see  FIG.  2 B ) in color after fall experiments at the same height. The images show panel TFE principal strains. The principal strain may become lower as a color becomes closer to a blue color, and the principal strain may become higher as a color becomes closer to a red color. Hereinafter, the inventive concepts will be described with reference to  FIGS.  11 A to  13 B . 
     A comparative example CM illustrated in  FIGS.  11 A and  11 B  may have a structure in which the impact absorbing member ABS, the second adhesive member A 2 , and the guide portion DM are omitted, as compared with the electronic apparatus EA- 1  of  FIG.  10 A . As a result of the fall experiment of the comparative example CM, the principal strain of an area corresponding to the folding portion FBP is high. Here, the generated principal strain of the folding portion FBP is about 0.97%. According to the images of  FIGS.  11 A and  11 B , it may be recognized that the folding portion FBP is greatly deformed by an external impact caused by the fall of the comparative example CM. 
     A comparative example CM 1  illustrated in  FIGS.  12 A and  12 B  may have a structure in which the guide portion DM is omitted, as compared with the electronic apparatus EA- 1  of  FIG.  10 A . In other words, the comparative example CM 1  may further include the impact absorbing member ABS and the second adhesive member A 2 , as compared with the comparative example CM illustrated in  FIGS.  11 A and  11 B . 
     As a result of the fall experiment of the comparative example CM 1 , the folding portion FBP is deformed. However, the principal strain of the folding portion FBP of the comparative example CM 1  is lower than that of the folding portion FBP of the comparative example CM of  FIGS.  11 A and  11 B . The principal strain of the folding portion FBP of the comparative example CM 1  is about 0.57%. According to the images of  FIGS.  12 A and  12 B , the degrees of deformation of the folding portion FBP and an area around the folding portion FBP may be somewhat reduced by the impact absorbing member ABS (see  FIG.  10 A ), but some degree of the deformation may remain. 
     Referring to  FIGS.  13 A and  13 B , it may be recognized that the folding portion FBP is hardly deformed in the electronic apparatus EX according to the embodiment of the inventive concepts, as compared with the comparative examples CM and CM 1 . The principal strain of the folding portion FBP of the electronic apparatus EX is about 0.10%. In other words, according to the embodiment of the inventive concepts, the electronic apparatus EA- 1  may further include the guide portion DM, and thus damage of the display panel DP by an external impact may be prevented and the reliability of the electronic apparatus EA- 1  may be improved. 
     According to the embodiments of the inventive concepts, even though laterally bent or twisted deformation occurs at the support unit of the electronic apparatus by an external impact, deformation of the display panel may be reduced or prevented. Thus, the reliability of the electronic apparatus may be improved. 
     While the inventive concepts have been described with reference to example embodiments, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirits and scopes of the inventive concepts. Therefore, it should be understood that the above embodiments are not limiting, but illustrative. Thus, the scopes of the inventive concepts are to be determined by the broadest permissible interpretation of the following claims and their equivalents, and shall not be restricted or limited by the foregoing description.