Patent Publication Number: US-2023165105-A1

Title: Electronic device including display and camera

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2020-0056215, filed on May 11, 2020, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. 
     BACKGROUND 
     Field 
     The disclosure relates to an electronic device including a display and a camera. 
     Description of Related Art 
     Electronic devices, for example, portable electronic devices, are released in various sizes according to their functions and user preferences, and may include a large-screen touch display for securing wide visibility and convenient manipulation. The electronic device may include at least one camera. For example, the electronic device may include at least one camera disposed at the periphery of the display or disposed to overlap at least a portion of the display. 
     Recently, as a method of expanding the display area of a display in an electronic device, a technology for disposing a camera around (e.g., under) an active area of the display has been researched and developed. For example, the electronic device having a camera disposed under the active area of the display is required to improve transmittance in at least a portion of the display overlapping the camera (hereinafter, referred to as “camera overlap area”) in order to increase the amount of light incident on the camera. To this end, a method may be proposed to lower the arrangement density of pixels and/or wires of the display in the camera overlap area and form a transmission area in which pixels and/or wires are not formed in the camera overlap area. 
     In addition, in the electronic device, at least some of the light incident on the camera may be influenced by at least some of the layers of the display, so that defects may occur in the image captured by the camera due to the influence. For example, the defects may include a yellowish phenomenon in which an image is photographed yellow, a rainbow phenomenon in which a photographed image includes a spotted pattern, a color shift phenomenon in which the photographed image displays an unintended color, and the like. 
     The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure. 
     SUMMARY 
     Embodiments of the disclosure may provide an electronic device including a display and a camera. 
     Embodiments of the disclosure may provide an electronic device including a display and a camera, which is capable of improving transmittance in a camera overlap area of the display overlapping the camera and preventing and/or reducing defects in images photographed through the camera. 
     An electronic device according to various example embodiments of the disclosure may include: a housing; a display viewable through a portion of the housing; and a camera disposed to overlap the display and configured to photograph external light passing through the display, wherein the display may include a colorless and transparent substrate, a pixel layer disposed in a first direction from the substrate and comprising organic light-emitting diode (OLED) type pixels, an organic encapsulation layer (e.g., a thin film encapsulation (TFE)) disposed in the first direction from the pixel layer, and a color filter layer disposed in the first direction from the organic encapsulation layer, wherein the display may include a first area overlapping at least a portion of the camera and a second area not overlapping the camera, wherein an arrangement density of a first group of pixels in the first area may be lower than an arrangement density of a second group of pixels in the second area, and wherein the color filter layer may include first color filters overlapping the pixels of the first group, second color filters overlapping the pixels of the second group, a black matrix disposed between the second color filters in the second area, and a transmission area disposed between the first color filters in the first area. 
     A display according to various example embodiments of the disclosure may include: a colorless and transparent substrate; a pixel layer disposed in a first direction from the substrate and comprising organic light-emitting diode type pixels; an organic encapsulation layer (e.g., a thin film encapsulation (TFE)) disposed in the first direction from the pixel layer; a color filter layer disposed in the first direction from the organic encapsulation layer; a first area overlapping at least a portion of the camera; and a second area not overlapping the camera, wherein an arrangement density of a first group of pixels in the first area may be lower than an arrangement density of a second group of pixels in the second area, and wherein the color filter layer may include first color filters overlapping the pixels of the first group, second color filters overlapping the pixels of the second group, a black matrix disposed between the second color filters in the second area, and a transmission area disposed between the first color filters in the first area. 
     Embodiments of the disclosure are able to provide an electronic device including a display and a camera. 
     Embodiments of the disclosure are able to improve transmittance in a camera overlap area of a display overlapping a camera and prevent and/or reduce defects in the images photographed through the camera by modifying the structure of the display. 
     Advantageous effects obtainable from the disclosure may not be limited to the above mentioned effects, and other effects which are not mentioned may be clearly understood, through the following descriptions, by those skilled in the art to which the disclosure pertains. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features and advantages of certain embodiments of the present disclosure will be more apparent from the following detailed description, taken in conjunction with the accompanying drawings, in which: 
         FIG.  1    is a front perspective view illustrating an example electronic device according to various embodiments; 
         FIG.  2    is a rear perspective view illustrating the electronic device in  FIG.  1    according to various embodiments; 
         FIG.  3    is an exploded perspective view illustrating the electronic device in  FIG.  1    according to various embodiments; 
         FIG.  4    is an exploded perspective view illustrating an example display according to various embodiments; 
         FIG.  5    is a diagram illustrating an example stacked structure of a display according to various embodiments; 
         FIG.  6    is an image illustrating an example of a yellowish defect; 
         FIG.  7    is an image illustrating an example of a rainbow defect; 
         FIG.  8    is a diagram illustrating an example of a normal display area (e.g., a second area) of a display according to various embodiments; 
         FIG.  9    is a diagram illustrating an example of a camera overlap area (e.g., a first area) of a display according to various embodiments; 
         FIG.  10    is a cross-sectional view illustrating a camera overlap area (e.g., a first area) of a display according to various embodiments; 
         FIG.  11    is a cross-sectional view illustrating a color filter layer according to various embodiments; 
         FIG.  12    is a cross-sectional view illustrating a camera overlap area of a display according to a comparative example; 
         FIG.  13    is a cross-sectional view illustrating an example embodiment in which the structure of an organic encapsulation layer is modified; 
         FIG.  14    is a cross-sectional view illustrating an example embodiment in which an LTPS layer is not removed; 
         FIG.  15    is a cross-sectional view illustrating an example embodiment in which a color filter is formed in a transmission area; 
         FIG.  16    is a diagram illustrating an example embodiment in which a color filter is formed in a transmission area; 
         FIG.  17    is a diagram illustrating an example stacked structure of a display including a flexible substrate according to various embodiments; 
         FIG.  18    is a diagram illustrating an example electronic device that is folded by an in-folding type according to various embodiments; 
         FIG.  19    is a diagram illustrating an example electronic device that is folded by an out-folding type according to various embodiments; and 
         FIG.  20    is a diagram illustrating an example electronic device including a rollable display according to various embodiments. 
     
    
    
     DETAILED DESCRIPTION 
       FIG.  1    is a front perspective view illustrating an example electronic device  100  according to various embodiments.  FIG.  2    is a rear perspective view of the electronic device  100  in  FIG.  1    according to various embodiments. 
     Referring to  FIGS.  1  and  2   , an electronic device  100  according to an embodiment may include a housing  110  including a first surface (or front surface)  110 A, a second surface (a back surface)  110 B, and a side surface  110 C surrounding the space between the first surface  110 A and the second surface  110 B. In an embodiment (not shown), the housing may refer to a structure forming a portion of the first surface  110 A, the second surface  110 B, and the side surface  110 C in  FIG.  1   . According to an embodiment, the first surface  110 A may be formed by a front plate  102  (e.g., a glass plate or polymer plate including various coated layers) of which at least a portion is substantially transparent. The second surface  110 B may be formed by a rear plate  111  that is substantially opaque. 
     According to an embodiment, the electronic device  100  may include at least one of a display  101 , an input device  103 , audio output devices  107  and  114 , sensor modules  104  and  119 , cameras  105  and  112 , a key input device  117 , an indicator (not shown), and connectors  108  and  109 . In some embodiments, the electronic device  100  may exclude at least one of the elements (e.g., the key input device  117 , the connectors  108  and  109 , or the indicator), or may further include other elements. 
     According to an embodiment, the display  101 , for example, may be visible through a portion of the front plate  102 . In some embodiments, at least a portion of the display  101  may be visible through the front plate  102  configuring the first surface  110 A. In some embodiments, the edge of the display  101  may be formed to be substantially the same as the shape of an adjacent outer border of the front plate  102 . In an embodiment (not shown), in order to expand the area through which the display  101  is visible, the distance between the outer border of the display  101  and the outer border of the front plate  102  may be formed to be substantially the same. 
     According to an embodiment, the surface of the housing  110  (or the front plate  102 ) may include a screen display area that is formed as the display  101  is visually exposed. According to an embodiment, the screen display area may include a camera overlap area A 1  (e.g., a first area) in which a first camera  105  is disposed thereunder (e.g., in the direction z 2 ) and a normal display area A 2  (e.g., a second area) in which a camera is not disposed thereunder (e.g., in the direction z 2 ). According to an embodiment, the screen display area may further include a sensor overlap area (not shown) in which at least one sensor module (not shown) is disposed thereunder (e.g., in the direction z 2 ). For example, at least one sensor module may be any of various types of sensors which operate by obtaining external light. 
     According to an embodiment, the cameras  105  and  112  may include a first camera  105  disposed on the first surface  110 A of the electronic device  100  and/or a second camera  112  disposed on the second surface  110 B thereof. The cameras  105  and  112  may include one or more lenses, an image sensor, and/or an image signal processor. The cameras  105  and  112  may further include a flash  113 . In some embodiments, two or more lenses (a wide-angle lens, an ultra-wide-angle lens, or a telephoto lens) and image sensors may be disposed on the first surface  110 A or the second surface  110 B of the electronic device  100 . In an embodiment, the electronic device  100  may include a plurality of cameras  105  and  112 . For example, the electronic device  100  may include a plurality of cameras (e.g., a dual camera or a triple camera), which have different properties (e.g., an angle of view) or functions from each other. For example, a plurality of cameras  105  and  112  including lenses having different angles of view from each other may be configured, and the electronic device  100  may perform control to change the angles of view of the cameras  105  and  112  operated in the electronic device  100 , based on the user&#39;s selection. In addition, the plurality of cameras  105  and  112  may include at least one of a wide-angle camera, a telephoto camera, a color camera, a monochrome camera, or an infrared (IR) camera (e.g., a time-of-flight (TOF) camera or a structured light camera). According to an embodiment, the IR camera may be operated as at least a portion of the sensor module. 
     According to an embodiment, a first camera  105  may be disposed under the camera overlap area A 1  of the display (e.g., in the direction z 2 ). For example, since the first camera  105  is disposed under the camera overlap area A 1  of the display (e.g., in the direction z 2 ), the position of the first camera  105  may not be visually distinguished (or exposed). According to an embodiment, when the display  101  is viewed from the front (e.g., in the direction z 1 ), the first camera  105  may obtain an image of an external subject while not being visually exposed to the outside because it is disposed in the camera overlap area A 1 , which is at least a portion of the display. For example, when the display  101  is viewed from the front (e.g., in the direction z 1 ), the first camera  105  may be disposed to overlap at least a portion of the camera overlap area A, and may not be visually exposed, thereby obtaining an image of an external subject. 
     According to an embodiment, recesses or openings may be formed in a portion of the screen display area of the display  101  (e.g., the first surface  110 A), and at least one of the audio output device  114 , the sensor module  104 , a light-emitting element (e.g., a flash), and the camera  105  may be provided so as to be aligned, at least in part, with the recesses or the openings. In an embodiment, at least one of the audio output device  114 , the sensor module  119 , the light-emitting element (e.g., a flash), and the camera  112  may be provided under the screen display area of the display  101 . 
     According to an embodiment, the display  101  may be combined with a touch detection circuit, a pressure sensor capable of measuring the strength (pressure) of a touch, and/or a digitizer for detecting magnetic stylus pens, or may be disposed adjacent thereto. 
     According to an embodiment, the input device  103  may include a microphone  103 . In some embodiments, the input device  103  may include a plurality of microphones  103  arranged to detect the direction of sound. The audio output devices  107  and  114  may include speakers  107  and  114 . The speakers  107  and  114  may include an external speaker  107  and a call receiver  114 . In some embodiments, the microphone  103 , the speakers  107  and  114 , and the connectors  108  and  109  may be disposed in the space of the electronic device  100 , and may be exposed to the outside through at least one hole formed in the housing  110 . In some embodiments, the hole formed in the housing  110  may be used in common for the microphone  103  and the speakers  107  and  114 . In some embodiments, the audio output devices  107  and  114  may include a speaker (e.g., a piezo speaker) that operates without the hole formed in the housing  110 . 
     According to an embodiment, the sensor modules  104  and  119  may generate electrical signals or data values corresponding to the internal operation state of the electronic device  100  or the external environment state. The sensor modules  104  and  119 , for example, may include a first sensor module  104  (e.g., a proximity sensor) and/or a second sensor module (not shown) (e.g., a fingerprint sensor) disposed in the first surface  110 A of the housing  110 , and/or a third sensor module  119  (e.g., an HRM sensor) disposed in the second surface  110 B of the housing  110 . The fingerprint sensor may be disposed in the first surface  110 A of the housing  110 , in a portion of the second surface  110 B, or under the display  101 . The electronic device  100  may further include at least one of sensor modules, which are not shown, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor. 
       FIG.  3    is an exploded perspective view illustrating the electronic device  100  shown in  FIG.  1    according to various embodiments. 
     The electronic device  300  in  FIG.  3    may be similar, at least in part, to the electronic device  100  shown in  FIGS.  1  and  2   , or may further include other elements. 
     Referring to  FIG.  3   , the electronic device  300  (e.g., the electronic device  100  in  FIG.  1  or  2   ) may include a side member  310  (e.g., the side bezel structure  118  in  FIG.  2   ), a first support member  311  (e.g., a bracket or a support structure), a front plate  320  (e.g., a front cover or the front plate  102  in  FIG.  1   ), a display  400  (e.g., the display  101  in  FIG.  1   ), a printed circuit board (PCB)  340  (e.g., a flexible PCB (FPCB) or a rigid flexible PCB (RFPCB)), a battery  350 , a second support member  360  (e.g., a rear case), an antenna  370 , and a rear plate  380  (e.g., a rear cover or the rear plate  111  in  FIG.  2   ). In some embodiments, the electronic device  300  may exclude at least one of the elements (e.g., the first support member  311  or the second support member  360 ), or may further include other elements. At least one of the elements of the electronic device  300  may be the same as or similar to at least one of the elements of the electronic device  100  in  FIG.  1  or  2   , and a redundant description thereof will not be repeated here. 
     According to an embodiment, the first support member  311  may be disposed inside the electronic device  300 , and may be coupled to the side member  310 , or may be integrally formed with the side member  310 . The first support member  311 , for example, may be formed of a metal material and/or a non-metal material (e.g., polymer). The first support member  311  may have one surface to which a display  400  is coupled and the opposite surface to which the printed circuit board  340  is coupled. 
     According to an embodiment, the printed circuit board  340  may have a processor, a memory, and/or an interface, which are mounted thereto. The processor may include one or more of, for example, a central processing unit, an application processor, a graphic processing unit, an image signal processor, a sensor hub processor, or a communication processor. 
     According to an embodiment, the memory may include, for example, a volatile memory or a non-volatile memory. 
     According to an embodiment, the interface may include, for example, a high-definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, and/or an audio interface. The interface, for example, may electrically or physically connect the electronic device  300  to an external electronic device, and may include a USB connector, an SD card/MMC connector, or an audio connector. 
     According to an embodiment, the battery  350  may refer, for example, to a device for supplying power to at least one element of the electronic device  300 , and may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell. At least a portion of the battery  350 , for example, may be disposed substantially on the same plane as the printed circuit board  340 . The battery  350  may be integrally disposed inside the electronic device  300 . In an embodiment, the battery  350  may be disposed to be detachable from the electronic device  300 . 
     According to an embodiment, the antenna  370  may be disposed between the rear plate  380  and the battery  350 . The antenna  370  may include, for example, a near-field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna. The antenna  370 , for example, may perform short-range communication with an external device, or may transmit and receive wireless power required for charging. In an embodiment, an antenna structure may be formed by a portion of the side bezel structure  310  and/or the first support member  311 , or a combination thereof. 
     According to an embodiment, the second support member  360  (e.g., the rear case) may be disposed between the printed circuit board  340  and the antenna  370 . According to an embodiment, the second support member  360  may include one surface to which at least one of the printed circuit board  340  or the battery  350  is coupled and the opposite surface to which the antenna  370  is coupled. 
     According to an embodiment, the first support member  311  of the side member  310  may include a first surface  3101  facing the front plate  320  and a second surface  3102  facing in the direction opposite the first surface  3101  (e.g., toward the rear plate  380 ). According to an embodiment, the camera  105  (e.g., the first camera  105  in  FIG.  1   ) may be disposed between the first support member  311  and the rear plate  380 . According to an embodiment, the camera  105  may be disposed to protrude or be visible in the direction toward the front plate  320  through a through-hole  301  leading from the first surface  3101  of the first support member  311  to the second surface  3102  thereof. According to an embodiment, the portion of the camera  105 , which protrudes through the through-hole  301 , may be disposed at the corresponding position of the display  400  so as to detect an external environment. In an embodiment, if the camera  105  is disposed between the display  400  and the first support member  311 , the through-hole  301  may be unnecessary. 
     Hereinafter, disposition of the display  400  and the camera  105  in the electronic device  300  will be described in greater detail. 
     An electronic device (e.g., the electronic device  100  in  FIG.  1   ) according to various embodiments of the disclosure may include a housing (e.g., the housing  110  in  FIG.  1   ), a display (e.g., the display  400  in  FIG.  4   ) to be viewed through a portion of the housing  110 , and a camera (e.g., the first camera  105  in  FIG.  1   ) disposed to overlap the display  400  and configured to photograph external light passing through the display  400 , wherein the display  400  may include a colorless and transparent substrate (e.g., the substrate  511  in  FIG.  5   ), a pixel layer (e.g., the pixel layer  540  in  FIG.  5   ) formed in a first direction (e.g., z 1  in  FIG.  5   ) from the substrate  511  and having pixels formed by an organic light-emitting diode (OLED) type, an organic encapsulation layer (e.g., the organic encapsulation layer  550  in  FIG.  5   ) (e.g., a thin film encapsulation (TFE)) formed in the first direction z 1  from the pixel layer  540 , and a color filter layer (e.g., the color filter layer  433  in  FIG.  5   ) formed in the first direction z 1  from the organic encapsulation layer  550 , wherein the display  400  may include a first area (e.g., A 1  in  FIG.  10   ) overlapping at least a portion of the camera  105  and a second area (e.g., A 2  in  FIG.  10   ) that does not overlap the camera  105 , wherein the arrangement density of a first group of pixels (e.g., the pixels  901  of the first group in  FIG.  10   ) formed in the first area A 1  may be lower than the arrangement density of a second group of pixels (e.g., the pixels  801  of the second group in  FIG.  10   ) formed in the second area A 2 , and wherein the color filter layer  433  may include first color filters (e.g., the first color filters  902  in  FIG.  10   ) arranged to overlap the pixels  901  of the first group, second color filters (e.g., the second color filters  802  in  FIG.  10   ) arranged to overlap the pixels  801  of the second group, a black matrix (e.g., the black matrix BM in  FIG.  11   ) disposed between the second color filters  802  in the second area A 2 , and a transmission area (e.g., the transmission area TA in  FIG.  10   ) disposed between the first color filters  902  in the first area A 1 . 
     The substrate  511  may, for example, be colorless and transparent glass. 
     The substrate  511  may, for example be a colorless, transparent, and flexible substrate  511 . 
     The display  400  may not include a polarizer. 
     An air layer may not be formed between the pixel layer  540  and the organic encapsulation layer  550 . 
     The organic encapsulation layer  550  may include a first inorganic layer  551 , an organic layer  552 , and a second inorganic layer  553  (refer to  FIG.  10   ), which are formed in the first direction z 1 . 
     The substrate  511  and the organic encapsulation layer  550  may be in contact with each other in the area between the pixels  901  (refer to  FIG.  9   ) of the first group. 
     The surface of the organic encapsulation layer  550  formed in the first area A 1  may be even. 
     The organic layer  552  may have a first variation in height in the first area A 1 , and the organic layer  552  may have a second variation in height, which is less than the first variation, in the second area A 2 . 
     The surface of the organic encapsulation layer  550  may be even from the first area A 1  to the second area A 2 . 
     In the first area A 1 , the organic layer  552  may have a first height D 1  in the area corresponding to the pixels  901  of the first group, and may have a second height D 2  greater than the first height D 1  in the area between the pixels  901  of the first group. 
     The color filter layer  433  may further include third color filters arranged in the transmission area TA, and the area of the third color filters may be less than the area of the first color filters  902  and the area of the second color filters  802 . 
     The color filter layer  433  may further include a second black matrix BM formed to be arranged irregularly between the third color filters in the transmission area TA. 
     A display (e.g., the display  400  in  FIG.  4   ) according to various example embodiments may include: a colorless and transparent substrate (e.g., the substrate  511  in  FIG.  5   ), a pixel layer (e.g., the pixel layer  540  in  FIG.  5   ) disposed in a first direction (e.g., z 1  in  FIG.  5   ) from the substrate and comprising organic light-emitting diode (OLED) type pixels, an organic encapsulation layer (e.g., the organic encapsulation layer  550  in  FIG.  5   ) (e.g., thin film encapsulation (TFE)) disposed in the first direction from the pixel layer, a color filter layer (e.g., the color filter layer  433  in  FIG.  5   ) disposed in the first direction from the organic encapsulation layer, a first area (e.g., the first area A 1  in  FIG.  10   ) overlapping at least a portion of a camera (e.g., the camera  105  in  FIG.  1   ), and a second area (e.g., the second area A 2  in  FIG.  10   ) not overlapping the camera, wherein the arrangement density of a first group of pixels (e.g., the pixels  901  of the first group in  FIG.  10   ) in the first area may be lower than the arrangement density of a second group of pixels (e.g., the pixels  801  of the second group in  FIG.  10   ) in the second area, and wherein the color filter layer may include first color filters (e.g., the first color filters  902  in  FIG.  10   ) overlapping the pixels of the first group, second color filters (e.g., the second color filters  802  in  FIG.  10   ) overlapping the pixels of the second group, a black matrix (e.g., the black matrix BM in  FIG.  11   ) disposed between the second color filters in the second area, and a transmission area (e.g., the transmission area TA in  FIG.  10   ) disposed between the first color filters in the first area. 
     The organic encapsulation layer  550  may include a first inorganic layer  551 , an organic layer  552 , and a second inorganic layer  553 , which are formed in the first direction z 1 . 
     The substrate  511  and the organic encapsulation layer  550  may be in contact with each other in an area between the pixels overlapping the camera  105 . 
     The surface of the organic encapsulation layer  550  formed in the first area A 1  may be even. 
     The organic layer  552  may have a first variation in height in the first area A 1 , and the organic layer  552  may have a second variation in height, which is less than the first variation, in the second area A 2 . 
     The surface of the organic encapsulation layer  550  may be even from the first area A 1  to the second area A 2 . 
     In the first area A 1 , the organic layer  552  may have a first height D 1  in an area corresponding to the pixels  901  of the first group, and may have a second height D 2  greater than the first height D 1  in an area between the pixels  901  of the first group. 
     A display (e.g., the display  400  in  FIG.  4   ) according to various example embodiments may include: a pixel layer (e.g., the pixel layer  540  in  FIG.  5   ) comprising organic light-emitting diode (OLED) type pixels, an organic encapsulation layer (e.g., the organic encapsulation layer  550  in  FIG.  5   ) (thin film encapsulation (TFE)) disposed in a first direction (e.g., z 1  in  FIG.  5   ) from the pixel layer, a color filter layer (e.g., the color filter layer  433  in  FIG.  5   ) disposed in the first direction from the organic encapsulation layer, a first area (e.g., the first area A 1  in  FIG.  10   ) overlapping at least a portion of a camera (e.g., the camera  105  in  FIG.  1   ), and a second area (e.g., the second area A 2  in  FIG.  10   ) not overlapping the camera, wherein the arrangement density of a first group of pixels (e.g., the pixels  901  of the first group in  FIG.  10   ) in the first area may be lower than the arrangement density of a second group of pixels (e.g., the pixels  801  of the second group in  FIG.  10   ) in the second area, and wherein the color filter layer may include first color filters (e.g., the first color filters  902  in  FIG.  10   ) overlapping the pixels of the first group, second color filters (e.g., the second color filters  802  in  FIG.  10   ) overlapping the pixels of the second group, a black matrix (e.g., the black matrix BM in  FIG.  11   ) disposed between the second color filters in the second area, and a transmission area (e.g., the transmission area TA in  FIG.  10   ) disposed between the first color filters in the first area, wherein the surface of the organic encapsulation layer may be even from the first area to the second area, and wherein the organic encapsulation layer may have a first variation in height in the first area, and the organic encapsulation layer may have a second variation in height, which is less than the first variation in height, in the second area. 
       FIG.  4    is an exploded perspective view illustrating a display  400  according to various embodiments. 
     The display  400  in  FIG.  4    may be similar, at least in part, to the display  101  in  FIG.  1    and the display  400  in  FIG.  3   , or may further include other elements of a display. 
     Referring to  FIG.  4   , the display  400  according to an embodiment may include a display panel  431 , a color filter layer  433  formed in a first direction (e.g., the upward direction) from the display panel  431 , a touch panel  432  formed between the color filter layer  433  and the display panel  431 , and/or a subsidiary material layer  440  formed in a second direction (e.g., the downward direction) from the display panel  431 . In an embodiment, the touch panel  432  may be formed in the first direction from the color filter layer  433 . 
     According to an embodiment, the display panel  431  may include organic light-emitting diodes (OLEDs). For example, the display panel  431  may include an unbreakable (UB) type OLED display (e.g., a curved display). According to an embodiment, the display panel  431  may include a first pixel (e.g., the first pixel R 1  in  FIG.  8   ) displaying a first color (e.g., red), a second pixel (e.g., the second pixel G 1  in  FIG.  8   ) displaying a second color (e.g., green), and/or a third pixel (e.g., the third pixel B 1  in  FIG.  8   ) displaying a third color (e.g., blue). According to an embodiment, the first to third pixels may be arranged parallel to each other according to a specified rule. For example, the first to third pixels may be arranged parallel to each other on the x-y plane shown in  FIG.  4   . According to various embodiments, the display panel  431  is not limited to the pixels of three colors, but may further include the pixels of other colors. For example, the display panel  431  may include pixels of three or more colors. According to various embodiments, the method in which the pixels of the display panel  431  are arranged may be variously modified or changed. According to various embodiments, the areas or shapes of the pixels of the display panel  431  may be variously modified or changed. 
     According to an embodiment, the display  400  may not include a polarizer (POL), which may be referred to, for example, as a retarder (e.g., a circular retarder), and may include the color filter layer  433  in a color filter-on-encapsulation (COE) type. According to an embodiment, since the display  400  does not include the POL, which is a retarder, it is possible to increase transmittance and to reduce thickness thereof. For example, the display  400  according to an embodiment may improve transmittance by about 20% or more, and may reduce the thickness by about 100 μm to about 150 μm, as compared to a conventional display including the POL, by removing the POL. According to an embodiment, the color filter layer  433  may perform the same or a similar function as the POL applied to the display including an organic light-emitting diodes (OLEDs). For example, the color filter layer  433  may improve outdoor visibility by blocking reflection light by the display panel  431 . 
     According to an embodiment, the subsidiary material layer  440  may include one or more polymer members  441  and  442  disposed on the back surface of the display panel  431  (e.g., the surface directed in the second direction (direction z 2 )), at least one functional member  443  disposed on the back surface of the one or more polymer members  441  and  442  (e.g., the surface directed in the second direction (direction z 2 )), and a metal sheet  444  disposed on the back surface of the at least one functional member  443  (e.g., the surface directed in the second direction (direction z 2 )). 
     According to an embodiment, the one or more polymer members  441  and  442  may include a light-shielding layer  441  (e.g., a black layer having an uneven pattern) for removing air bubbles, which may be generated between the display panel  431  and the attachments thereunder (e.g., in the second direction (direction z 2 )) and blocking the light generated from the display panel  431  or the light incident from the outside, and/or a buffer layer  442  (e.g., a sponge layer) disposed to buffer impact. According to an embodiment, the buffer layer  442  may include a cushion made of a polymer. 
     According to an embodiment, the at least one functional member  443  may include, for example, and without limitation, a heat dissipation sheet for heat dissipation (e.g., a graphite sheet), a force-touch FPCB, a fingerprint sensor FPCB, a communication antenna radiator, a conductive/non-conductive tape, an open cell sponge, or the like. 
     According to an embodiment, the metal sheet  444 , which may include a conductive member (e.g., a metal plate), may contribute to reinforcement of stiffness of the electronic device (e.g., the electronic device  300  in  FIG.  3   ), and may be used to shield ambient noise and dissipate heat emitted from surrounding heat emission components. According to an embodiment, the metal sheet  444  may include at least one of Cu, Al, Mg, SUS (steel use stainless) (e.g., stainless steel (STS)), or CLAD (e.g., a laminated member in which SUS and Al are alternately stacked). In various embodiments, the metal sheet  444  may include other alloy materials. 
     According to an embodiment, the subsidiary material layer  440  of the display  400  may further include a detection member  445  for detecting input by an electromagnetic induction type writing tool (e.g., an electronic pen). According to an embodiment, the detection member  445 , which may include a digitizer, may include a coil member disposed on the dielectric substrate in order to detect resonance frequency by an electromagnetic induction method, which is applied from the electronic pen. In some embodiments, the detection member  445  may be omitted. According to an embodiment, the detection member  445  may be disposed between at least one polymer member  442  and the functional member  443 . In an embodiment, the detection member  445  may be disposed between the display panel  431  and at least one polymer member  441 . In an embodiment, the detection member  445  may be disposed under the metal sheet  444 . 
     According to various embodiments, the subsidiary material layer  440  may include openings  4411 ,  4421 ,  4451 , and  4441  formed at the positions overlapping the camera (e.g., the camera  105  in  FIG.  5   ). According to an embodiment, the openings  4411 ,  4421 ,  4451 , and  4441  may be formed by removing portions overlapping the camera  105  from the subsidiary material layer  440 . According to an embodiment, the camera  105  may be disposed to be close to the back surface of the display panel  431  (e.g., the surface directed in the second direction (direction z 2 )) through the openings  4411 ,  4421 ,  4451 , and  4441 . According to an embodiment, the sizes (e.g., diameters or areas) of the plurality of openings  4411 ,  4421 ,  4451 , and  4441  may be determined based on the size of the camera  105  and/or the angle of view of the camera  500 , and the openings  4411 ,  4421 ,  4451 , and  4441  may have different sizes from each other. 
     According to an embodiment, the front cover  320  (e.g., a front plate, a glass plate, a first cover member, or a cover member) may be formed in the first direction from the display  400 . According to an embodiment, the front cover  320  may include a glass layer. For example, the front cover  320  may include ultra-thin glass (UTG). In some embodiments, the front cover  320  may include a polymer. For example, the front cover  320  may include polyethylene terephthalate (PET) or polyimide (PI). In some embodiments, a plurality of front cover  320  may be disposed. In some embodiments, one layer of the plurality of front covers  320  may be bonded by an adhesive (or bonding agent) that is weaker or thinner than the adhesive of another layer, thereby allowing the one layer to be easily separated from another layer. According to an embodiment, the adhesive may include an optical clear adhesive (OCA), an pressure-sensitive adhesive (PSA), a heat-reactive adhesive, a photo-reactive adhesive, a normal adhesive, and/or a double-sided tape. 
     According to an embodiment, the display  400  may exclude at least one of the touch panel  432 , the detection member  445 , and/or the metal sheet  444 . 
     According to an embodiment, the display  400  may include a control module (not shown). According to an embodiment, the control module may include an FPCB for electrically connecting the printed circuit board (e.g., the printed circuit board  340  in  FIG.  3   ) of the electronic device (e.g., the electronic device  300  of  FIG.  3   ) with the display panel  431 , and a display driver IC (DDI) mounted on the FPCB. According to an embodiment, the control module (not shown) may include a display driver IC (DDI) and/or a touch display driver IC (TDDI) disposed by a chip-on-panel (COP) or chip-on-film (COF) type. 
     In an embodiment, the display  400  may include a fingerprint sensor (not shown) disposed around the control module. According to an embodiment, the fingerprint sensor may come into contact with a finger from the outer surface of the front cover  320  through the holes that are at least partially formed in some of the elements of the display  400 , or may include an ultrasonic or optical fingerprint sensor capable of recognizing the fingerprint approaching the same. 
       FIG.  5    is a diagram illustrating an example stacked structure of a display according to various embodiments.  FIG.  6    is an image illustrating an example of a yellowish defect.  FIG.  7    is an image illustrating an example of a rainbow defect. 
     The display  400  illustrated in  FIG.  5    may be similar, at least in part, to the display  400  shown in  FIG.  4   , or may further include other elements. Hereinafter, a redundant description in relation to  FIG.  5    may not be repeated here. 
     Referring to  FIG.  5   , the display  400  according to an embodiment may include a substrate  511 , a black mask layer  520  formed in a first direction z 1  (e.g., the upward direction) from the substrate  511 , a low-temperature polycrystalline silicon (LTPS) layer  530  formed in the first direction z 1  from the black mask layer  520 , a pixel layer  540  formed in the first direction z 1  from the LTPS layer  530 , and/or an organic encapsulation layer  550  formed in the first direction z 1  from the pixel layer  540 . According to an embodiment, a touch sensor layer  432  may be formed in the first direction z 1  from the organic encapsulation layer  550  of the display  400 , and a color filter layer  433  may be formed in the first direction z 1  from the touch sensor layer  432 . According to an embodiment, the touch sensor layer  432  may be formed in the first direction z 1  from the color filter layer  433 . A window  320  may be disposed as a front cover (e.g., the front cover  320  in  FIG.  4   ) in the first direction z 1  of the display  400 . 
     According to an embodiment, the substrate  511  may be formed of a colorless and transparent material. For example, the substrate  511  may be a colorless, transparent, and non-flexible substrate  511 . According to an embodiment, the substrate  511  may be colorless and transparent glass. 
     The display  400  according to an embodiment may prevent and/or reduce a yellowish phenomenon in which the image photographed through the camera  105  becomes yellow as shown in  FIG.  6    using the colorless and transparent substrate  511 . For example, a display (not shown) according to a comparative example may include a polyimide (PI) film having a yellow color as the flexible substrate, and the yellowish phenomenon in which the image photographed through the camera  105  becomes yellow may occur due to the color of the polyimide (PI) film. 
     According to an embodiment, the black mask layer  520  may include a black mask (e.g., the black mask metal  521  in  FIG.  10   ) formed in a portion of the first area (e.g., the first area A 1  in  FIG.  10   ) overlapping at least a portion of the camera  105  (e.g., the camera  105  in  FIG.  1   ). For example, the black mask  521  may be arranged to overlap one or more pixels  901  formed to overlap the camera in the first area A 1 . According to an embodiment, the black mask  521  may be provided to reduce unintended diffraction of light in the first area A 1 , and may form a transmission area (e.g., the transmission area TA in  FIG.  10   ) having a pattern specified by adjusting the shape, size, and/or arrangement density thereof. For example, the transmission area TA may indicate the area through which external light passes. According to an embodiment of the disclosure, since the transmission area TA is formed in a specified pattern, it is possible to reduce the diffraction of the light incident on the camera  105  through the first area A 1 , thereby improving the quality of the image obtained through the camera  105 . According to an embodiment, the black mask  521  may be an opaque metal. According to various embodiments, the black mask  521  may be interchangeably used with terms such as a “light-diffraction prevention film”, a “light-transmission prevention film”, a “low-reflection light-diffraction prevention film”, and a “low-reflection light-transmission prevention film”, or may be replaced thereby. According to various embodiments, the black mask  521  may be formed of an organic material or an inorganic material in addition to the opaque metal. 
     According to an embodiment, for example, the black mask layer  520  may be included in a buffer layer. 
     According to an embodiment, the LTPS layer  530  may include a thin film transistor (TFT) (not shown) and a plurality of wires for driving the pixel layer  540 . For example, the LTPS layer  530  may include a storage capacitor, and the storage capacitor may maintain a voltage signal to the pixel, may maintain a voltage applied to the pixel within one frame, or may reduce a change in the gate voltage of the TFT due to leakage current during the light emission. The storage capacitor may maintain the voltage applied to the pixel at a predetermined time interval by routines (e.g., initialization, data write, etc.) controlling at least one TFT. According to an embodiment, in order to prevent and/or reduce unintended diffraction of light, the TFTs or the wires formed in the first area A 1  may be irregularly arranged. 
     According to an embodiment, the pixel layer  540  may include pixels in an organic light-emitting diode (OLED) type. According to an embodiment, the pixels may include a first pixel (e.g., the first pixel R 1  in  FIG.  8   ) displaying a first color (e.g., red), a second pixel (e.g., the second pixel G 1  in  FIG.  8   ) displaying a second color (e.g., green), and/or a third pixel (e.g., a third pixel B 1  in  FIG.  8   ) displaying a third color (e.g., blue). According to an embodiment, the first to third pixels may be disposed parallel to each other according to a specified rule. According to an embodiment, in order to prevent and/or reduce unintended diffraction of light, the first to third pixels formed in the first area A 1  may be irregularly arranged. 
     According to an embodiment, the pixels may include camera overlap pixels  901  arranged to overlap at least a portion of the camera  105  in the first area A 1  (hereinafter, referred to as “a first group of pixels”), and normal pixels  801  formed in the second area A 2  (hereinafter, referred to as “a second group of pixels”). 
     According to an embodiment, the organic encapsulation layer  550  may be a thin film encapsulation (TFE) including an organic layer  552 . According to an embodiment, the organic encapsulation layer  550  may include at least one inorganic layer and at least one organic layer. According to an embodiment, the organic encapsulation layer  550  may include a first inorganic layer (e.g., the first inorganic layer  551  in  FIG.  10   ) formed in the first direction z 1  from the pixel layer  540 , an organic layer (e.g., the organic layer  552  in  FIG.  10   ) formed in the first direction z 1  from the first inorganic layer  551 , and a second inorganic layer (e.g., the second inorganic layer  553 ) formed in the first direction z 1  from the organic layer  552 . According to an embodiment, an air layer may not be formed between the organic encapsulation layer  550  and the pixel layer  540 . If the air layer is formed between the organic encapsulation layer  550  and the pixel layer  540 , the transmittance or the frequency of light incident on the camera  105  through the first area A 1  may not be uniform, and an unintended color shift phenomenon may occur in the image photographed by the camera  105 . Various embodiments of the disclosure may prevent and/or reduce the color shift phenomenon by excluding the air layer between the organic encapsulation layer  550  and the pixel layer  540 . 
     According to an embodiment, the display  400  (e.g., the display  400  in  FIG.  4   ) may not include a polarizer (POL), which may be a retarder, and may include a color filter layer  433  in a color filter-on-encapsulation (COE) type. According to an embodiment, since the display  400  does not include the POL as a retarder, the transmittance may be increased and the thickness may be reduced. For example, since the transmittance of the POL is 40 to 45%, it is possible to increase the transmittance of the first area A 1  only by removing the POL in an embodiment of the disclosure. 
     The display  400  according to an embodiment may prevent and/or reduce a rainbow phenomenon, in which the image photographed through the camera  105  includes a spotted pattern as shown in  FIG.  7   , by removing the POL. For example, a combination of the POL and a polymer film (e.g., polyethylene terephthalate (PET)) stacked on at least a portion of the display  400  may cause a phase delay in the light passing through the first area A 1 , and the phase delay may cause the rainbow phenomenon. 
       FIG.  8    is a diagram illustrating an example of a normal display area (e.g., a second area A 2 ) of a display  400  according to various embodiments. 
     The display  400  shown in  FIG.  8    may be similar, at least in part, to the display  400  shown in  FIG.  4   , or may further include other elements. 
     Referring to  FIG.  8   , pixels  801  of a second group, which do not overlap the camera  105 , may be arranged in the second area A 2  of the display  400  according to an embodiment. According to an embodiment, the pixels  801  of the second group may include a first pixel R 1  displaying a first color (e.g., red), a second pixel G 1  displaying a second color (e.g., green), and/or a third pixel B 1  displaying a third color (e.g., blue). 
     According to an embodiment, the second area A 2  of the display  400  may include color filters  802  arranged to at least partially overlap the pixels  801  of the second group. For example, the color filters may include a red color filter CF_R 1  arranged to overlap the first pixel R 1 , a green color filter CF_G 1  arranged to overlap the second pixel G 1 , and a blue color filter CF_B 1  arranged to overlap the third pixel B 1 . According to an embodiment, colors of the color filters may be variously changed. According to an embodiment, the areas or shapes of the color filters may be substantially the same as the areas or shapes of the pixels. 
     In the following description, the color filters arranged in the second area A 2  of the display  400  will be referred to as “second color filters” (e.g., the second color filters  802  in  FIG.  10   ). 
       FIG.  9    is a diagram illustrating an example of a camera overlap area (e.g., a first area A 1 ) of a display  400  according to various embodiments. 
     The display  400  shown in  FIG.  9    may be similar, at least in part, to the display  400  shown in  FIG.  4   , or may further include other elements. Hereinafter, a redundant description in relation to  FIG.  9    may not be repeated here. 
     Referring to  FIG.  9   , pixels  901  of a first group, which overlap at least a portion of the camera  105 , may be arranged in the first area A 1  of the display  400  according to an embodiment. According to an embodiment, the pixels  901  of the first group may include a first pixel R 2  displaying a first color (e.g., red), a second pixel G 2  displaying a second color (e.g., green), and/or a third pixel B 2  displaying a third color (e.g., blue). 
     According to an embodiment, the first area A 1  of the display  400  may include color filters arranged to overlap the pixels  901  of the first group. For example, the color filters  902  may include a red color filter CF_R 2  arranged to overlap the first pixel R 2 , a green color filter CF_G 2  arranged to overlap the second pixel G 2 , and a blue color filter CF_B 2  arranged to overlap the third pixel B 2 . According to an embodiment, the colors of the color filters may be variously changed. 
     In the following description, the color filters arranged in the first area A 1  of the display  400  will be referred to as “first color filters” (e.g., the first color filters  902  in  FIG.  10   ). 
     According to an embodiment, the first area A 1  of the display  400  may include a black mask  521  arranged to overlap, at least in part, the pixels  901  of the first group, and a blocked area BA and a transmission area TA may be defined by the black mask  521 . For example, the blocked area BA may be the area in which the black mask  521  is formed at least in part, and may be the area overlapping the pixels  901  of the first group. For example, the transmission area TA may be the area in which the black mask  521  and the pixels  901  of the first group are not formed. According to an embodiment, the black mask  521  may be provided to reduce unintended diffraction of light in the first area A 1 , and may form a transmission area TA having a pattern specified by adjusting the shape, size, and/or arrangement density thereof. According to an embodiment of the disclosure, since the transmission area TA is formed in a specified pattern, it is possible to reduce the diffraction of the light incident on the camera  105  through the first area A 1 , thereby improving the quality of the image obtained through the camera  105 . According to an embodiment, the black mask  521  may be an opaque metal. Although the transmission area TA has the shape of a cross in the example shown in  FIG.  9   , the shape of the transmission area TA may be modified in various ways. According to various embodiments, the layer in which the black mask  521  is formed may be variously modified or changed. For example, the black mask  521  may be formed in the second direction z 2  from the substrate  511 . 
     According to an embodiment, a plurality of wires  903  for driving the pixels  901  of the first group may be formed in the blocked area BA. According to an embodiment, the plurality of wires may include touch wires electrically connected to a touch panel. 
     Comparing  FIG.  8    with  FIG.  9   , in the display  400  according to an embodiment, the arrangement density of the pixels  901  of the first group, which are formed in the first area A 1 , may be lower than the arrangement density of the pixels  801  of the second group, which are formed in the second area A 2 . Accordingly, in an embodiment of the disclosure, the transmittance of the first area A 1  may be improved. For example, when viewed in the first direction z 1  of the display  400 , the pixels  901  of the first group, which overlap at least a portion of the camera  105 , may be formed to have an arrangement density (e.g., a pixel density) of a first density (e.g., about 50%), and other pixels (e.g., the pixels  801  of the second group) other than the pixels  901  of the first group may be formed to have an arrangement density of a second density (e.g., about 80%), which is different from the first density. For example, the first density may be lower than the second density. According to an embodiment, a plurality of pixels may not be arranged in the area (e.g., the first area A 1 ) that overlaps, at least in part, at least one electronic component (e.g., the camera module or the sensor module) included in the electronic device  100 . 
       FIG.  10    is a cross-sectional view illustrating an area overlapping a camera  105  (e.g., a first area A 1 ) of a display  400  according to various embodiments. For example,  FIG.  10    may be a partially cross-sectional view of the electronic device  100  viewed from the line  10 - 10  in  FIG.  1   . 
     The display  400  shown in  FIG.  10    may be similar, at least in part, to the display  400  shown in  FIG.  4   , or may further include other elements. Hereinafter, a redundant description in relation to  FIG.  10    may not be repeated here. 
     Referring to  FIG.  10   , the display  400  according to an embodiment may include a substrate  511 , a black mask  521  formed in a first direction z 1  (e.g., the upward direction) from the substrate  511 , a low-temperature polycrystalline silicon (LTPS) layer  530  formed in the first direction z 1  from the substrate  511  including the black mask  521 , a pixel layer  540  formed in the first direction z 1  from the LTPS layer  530 , and/or an organic encapsulation layer  550  formed in the first direction z 1  from the pixel layer  540 . According to an embodiment, a color filter layer  433  which is not shown may be formed in the first direction z 1  from the organic encapsulation layer  550  of the display  400 . According to an embodiment, a touch sensor layer  432 , which is not shown, may be further formed between the organic encapsulation layer  550  and the color filter layer  433 . According to an embodiment, the touch sensor layer  432  may be formed in the first direction z 1  from the color filter layer  433 . A window  320  may be disposed as a front cover (e.g., the front cover  320  in  FIG.  4   ) in the first direction z 1  of the display  400 . 
     According to an embodiment, an air layer may not be formed between the organic encapsulation layer  550  and the pixel layer  540 . If the air layer is formed between the organic encapsulation layer  550  and the pixel layer  540 , the transmittance or the frequency of the light incident on the camera  105  through the first area A 1  may not be uniform, and an unintended color shift phenomenon may occur in the image photographed by the camera  105 . Various embodiments of the disclosure may prevent and/or reduce the color shift phenomenon by excluding the air layer between the organic encapsulation layer  550  and the pixel layer  540 . 
     According to an embodiment, the pixels  901  of the first group may be arranged in the first area A 1 , and the black mask  521  and the first color filters (e.g., the first color filters  902  in  FIG.  9   ) may be arranged to overlap the pixels  901  of the first group. According to an embodiment, the area overlapping at least in part the pixels  901  of the first group may be referred to as a “blocked area BA”. 
     According to an embodiment, the black mask  521  may not be formed in the area between the pixels  901  of the first group. For example, the area between the pixels  901  of the first group may be referred to as a “transmission area TA”. 
     According to an embodiment, the pixels  801  of the second group may be arranged in the second area A 2 , and second color filters (e.g., the second color filters  802  in  FIG.  8   ) may be arranged to overlap the pixels  801  of the second group. 
     According to an embodiment, the organic encapsulation layer  550  may include a first inorganic layer  551  formed in the first direction z 1  from the pixel layer  540 , an organic layer  552  formed in the first direction z 1  from the first inorganic layer  551 , and a second inorganic layer  553  formed in the first direction z 1  from the organic layer  552 . 
     According to an embodiment, the pixel layer  540  and the LTPS layer  530  may be removed from the transmission area TA. For example, the substrate  511  and the organic encapsulation layer  550  may be in contact with each other in the transmission area TA. For example, the substrate  511  and the first inorganic layer  551  of the organic encapsulation layer  550  may be in contact with each other in the transmission area TA. The embodiment of the disclosure described above may improve the transmittance in the first area A 1 . 
       FIG.  11    is a cross-sectional view illustrating a color filter layer  433  according to various embodiments. 
     Referring to  FIG.  11   , the display  400  according to an embodiment may have pixels  901  of a first group or pixels  801  of a second group formed in a first direction z 1  from the LTPS layer  530  and an organic encapsulation layer  550  formed in the first direction z 1  from the pixels  901  of the first group or the pixels  801  of the second group. 
     According to an embodiment, a color filter layer  433  may be formed in the first direction z 1  from the organic encapsulation layer  550 , and the color filter layer  433  may include color filters CF (e.g., the first color filters  902  or the second color filters  802  in  FIG.  10   ) and a black matrix BM. 
     According to an embodiment, the color filters CF may be arranged to overlap the pixels  901  of the first group or the pixels  801  of the second group. For example, the color filters CF may include first color filters  902  arranged to overlap the pixels  901  of the first group and second color filters  802  arranged to overlap the pixels  801  of the second group. 
     According to an embodiment, the black matrix BM may be arranged to overlap the area between the pixels  901  of the first group. The black matrix BM may be arranged to overlap at least a portion of the area between the pixels  801  of the second group. 
     In the illustrated example, reference numeral  1101  may be a first electrode (e.g., an anode electrode) of the OLED formed in the first direction z 1  from the LTPS layer  530 . 
     In the illustrated example, reference numeral  1102  may be an organic light-emitting layer formed in the first direction z 1  from the first electrode. 
     In the illustrated example, reference numeral  1103  may be a bank that partitions the first electrode and the organic light-emitting layer. For example, the bank  1103  (e.g., a partition wall) may be positioned on the LTPS layer  530 . The bank  1103  may include organic materials, such as polyacrylate resin, polyimides resin, or the like, or silica-based inorganic materials. According to an embodiment, the bank  1103  may include a light-shielding material, thereby blocking the light. In the case where the bank  1103  includes a light-shielding material, it is possible to prevent and/or reduce the mixture of colors between the light generated in the organic light-emitting layer of one pixel and the light generated in the organic light-emitting layer of a neighboring pixel. In an embodiment, the bank  1103  may include an opaque material, and may play the role of blocking light. In the case where the bank  1103  does not include the POL, it may play the role of blocking the reflection of external light. 
     In the illustrated example, reference numeral  1104  may be a second electrode (e.g., a cathode electrode) of the OLED. Although not shown, at least a portion of the second electrode  1104  may be removed from the area overlapping the transmission area TA. 
       FIG.  12    is a cross-sectional view illustrating an area A 1  overlapping a camera  105  of a display  400  according to a comparative example. 
     Referring to  FIG.  10    together, in an embodiment of the disclosure, the pixel layer  540  and the LTPS layer  530  may be removed from the transmission area TA. However, if the organic encapsulation layer  550  is formed by a normal method after the process of removing the pixel layer  540  and the LTPS layer  530  from the transmission area TA, unevenness may occur in the surface of the organic encapsulation layer  550 . The comparative example shown in  FIG.  12    may be the example in which the organic encapsulation layer  550  is formed by a normal method after the process of removing the pixel layer  540  and the LTPS layer  530  from the transmission area TA. 
     Referring to  FIG.  12   , after the process of removing the pixel layer  540  and the LTPS layer  530 , high steps may be produced in the transmission area TA. The high steps in the transmission area TA may increase the surface area of the transmission area TA, and may cause unevenness in the surface of the organic layer  552  formed in the transmission area TA. For example, the surface  552   a  of the organic layer  552  may be uneven in the first area A 1  as shown  FIG.  12   . 
     According to the comparative example, since the transmission area TA from which the pixel layer  540  and the LTPS layer  530  are removed is formed only in the first area A 1 , the surface area of the first area A 1  may be greater than the surface area of the second area A 2 , based on substantially the same area. Therefore, if the composition material of the organic layer  552  is uniformly applied to the first area A 1  and the second area A 2 , the height of the surface  552   a  of the organic layer  552  formed in the first area A 1  may be lower than the height of the surface  552   a  of the organic layer  552  formed in the second area A 2 . In addition, as indicated by reference numeral  1201  in  FIG.  12   , a concave deposition phenomenon may occur in which the surface of the organic layer  552  is recessed in a second direction z 2  (e.g., the downward direction) at the center of the first area A 1 . The organic encapsulation layer  550  in which the concave deposition phenomenon occurs may play the role of a concave lens, which may cause defocus defects in which the focal length is unintentionally increased in the camera  105 . 
     In an embodiment of the disclosure, in order to prevent and/or reduce unevenness in the surface of the organic encapsulation layer  550 , the composition material of the organic layer  552  may not be uniformly applied to the first area A 1  and the second area A 2  when forming the organic layer  552  of the organic encapsulation layer  550 . For example, in an embodiment of the disclosure, a larger amount of composition material of the organic layer  552  may be applied to a unit area of the first area A 1 , and a smaller amount of the composition material of the organic layer  552  may be applied to a unit area of the second area A 2 . 
     Accordingly, the display  400  according to an embodiment of the disclosure, as shown in  FIG.  10   , may have the first area A 1  in which the surface of the organic encapsulation layer  550  is uniform, and may prevent and/or reduce the defocus defect therein. For example, as shown in  FIG.  10   , the organic layer  552  formed in the first area A 1  may have a first height (e.g., D 1  in  FIG.  10   ) in the area overlapping the pixels  901  of the first group, and may have a second height (the second height D 2  in  FIG.  10   ), which is greater than the first height (e.g., the first height D 1  in  FIG.  10   ), in the area between the pixels  901  of the first group (e.g., the area overlapping the transmission area TA). For example, as shown in  FIG.  10   , the organic layer  552  may have may have a first variation in height (e.g., the variation corresponding to the height of the pixels  801  of the second group) in the first area A 1 , and the organic layer may have a second variation in height (e.g., the variation corresponding to the height of the LTPS layer  530  and the height of the pixels  901  of the first group), which is smaller than the first variation, in the second area. 
     Referring to  FIG.  10   , in an embodiment of the disclosure, the surface  552   a  of the organic encapsulation layer  550  formed in the first area A 1  may be substantially even. In addition, the height of the surface  552   a  of the organic encapsulation layer  550  formed in the first area A 1  may be the same as the height of the surface  552   b  of the organic encapsulation layer  550  formed in the second area A 2 . For example, the surfaces  552   a  and  552   b  of the organic encapsulation layer  552  may be even from the first area A 1  to the second area A 2 . As described above, according to an embodiment shown in  FIG.  10   , although the transmission area TA has the steps, a larger amount of composition material of the organic layer  552  may be applied to a unit area of the first area A 1 , so that unevenness in the surface of the organic encapsulation layer  550  may not occur. Accordingly, according to an embodiment of the disclosure, the defocus defects, in which the focal length is unintentionally increased, may be prevented and/or reduced in the camera  105 . 
     In the illustrated example, reference numeral  1210  may, for example, be the POL according to the comparative example. 
       FIG.  13    is a cross-sectional view illustrating an embodiment in which the structure of an organic encapsulation layer  550  is modified. 
     The embodiment shown in  FIG.  13    may be similar, at least in part, to the embodiment shown in  FIG.  10   , or may further include other embodiments. Hereinafter, a redundant description in relation to  FIG.  13    may not be repeated here. 
     Referring to  FIG.  13   , in an embodiment of the disclosure, the composition material of the organic layer  552  is uniformly applied to the first area A 1  and the second area A 2 , and an etching process is further performed on the first area A 1 , so that the surface of the organic layer  552  may be uniform in the first area A 1 . Accordingly, in an embodiment of the disclosure, although the surface height  552   a  of the organic layer  552  in the first area A 1  is less than the surface height  552   b  of the organic layer  552  in the second area A 2 , the surface of the organic encapsulation layer  550  may be formed uniformly in the first area A 1 , thereby preventing and/or reducing the aforementioned defocus defect. 
       FIG.  14    is a cross-sectional view illustrating an embodiment in which an LTPS layer  530  is not removed. 
     The embodiment shown in  FIG.  14    may be similar, at least in part, to the embodiment shown in  FIG.  10   , or may further include other embodiments. Hereinafter, a redundant description in relation to  FIG.  14    may not be repeated here. 
     Referring to  FIG.  14   , an embodiment of the disclosure may include an LTPS layer  530  in the transmission area TA of the first area A 1 . Accordingly, the relatively high step is not produced in the transmission area TA, and even if the composition material of the organic layer  552  is uniformly applied to the first area A 1  and the second area A 2  in the deposition process of the organic layer  552 , unevenness may not occur in the surface of the organic layer  552 . 
       FIG.  15    is a cross-sectional view illustrating an embodiment in which a color filter is formed in a transmission area TA.  FIG.  16    is a plan view illustrating an embodiment in which a color filter is formed in a transmission area TA. 
     The embodiments shown in  FIGS.  15  and  16    may be similar, at least in part, to the embodiments shown in  FIGS.  9  and  10   , or may further include other embodiments. Hereinafter, a redundant description in relation to  FIGS.  15  and  16    may not be repeated here. 
     Referring to  FIGS.  15  and  16   , an embodiment of the disclosure may further include color filters  1502  formed in the transmission area TA of the first area A 1 . For example, the color filter layer  433  may further include a third color filters  1502  arranged in the transmission area TA. 
     According to an embodiment, the third color filters  1502  may include a red color filter CF_R 3 , a green color filter CF_G 3 , and a blue color filter CF_B 3 . In this embodiment, the third color filters  1502  may be dummy color filters, which may prevent and/or reduce user visibility for the first area A 1 . For example, since the third color filters  1502  are further formed as dummy color filters, the user may not easily distinguish the first area A 1  from the second area A 2  while the display  400  is turned off or the display  400  is displaying black. According to an embodiment, the configuration of the third color filters  1502  is not limited to the illustrated example, and may be variously modified. For example, the colors (e.g., the red color filter CF_R 3 , the green color filter CF_G 3 , and the blue color filter CF_B 3 ) and/or the number of the third color filters  1502  may be variously changed. For example, the third color filters  1502  may be configured as only green color filters. 
     In an embodiment, the area of the third color filters  1502  may be smaller than the area of the first color filters  902  and/or the area of the second color filters  802 . 
     In an embodiment, the color filter layer  433  may further include a second black matrix (not shown) formed and arranged irregularly between the third color filters  902 . For example, since the second black matrix (not shown) is arranged irregularly, it is possible to prevent and/or reduce unintended diffraction of the light incident on the camera  105 . 
       FIG.  17    is a diagram illustrating an example stacked structure of a display including a flexible substrate according to various embodiments. 
     The embodiments shown in  FIG.  17    may be similar, at least in part, to the embodiments shown in  FIG.  5   , or may further include other embodiments. Hereinafter, a redundant description in relation to  FIG.  17    may not be repeated here. 
     Referring to  FIG.  17   , the display  400  according to an embodiment may be a flexible display including a flexible substrate  512 . The electronic device according to an embodiment may include the flexible display, and may be an electronic device in which at least a portion of the display is foldable as shown in  FIG.  18    and  FIG.  19    (e.g., the display  1840  in  FIG.  18    or the display  1940  in  FIG.  19   ). 
     Referring to  FIG.  17   , according to an embodiment, the substrate  512  may include a flexible substrate formed of a colorless and transparent material. For example, the substrate  512  may be a film of a colorless and transparent polymer material. For example, the substrate  512  may include at least one material among polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene sulfide (PES), polyethylene (PE), and polyimide (PI). According to an embodiment, the LTPS layer  530  may include LTPS or liquid crystal polymer (LCP). 
     In an embodiment, a protective film  1710  may be attached to the substrate  512  in the second direction z 2  therefrom. For example, the protective film  1710  may be polyethylene terephthalate (PET). 
     In an embodiment, the ultra-thin glass (UTG)  1720  may be attached to the color filter layer  433  in the first direction z 1  therefrom. The UTG  1720  may play the role of protecting the display  400  from external impact. 
     In an embodiment, a window  1730  may be formed as a front cover in the first direction z 1  from the UTG  1720 . For example, the window  1730  may include a polyimide (PI) material. 
       FIG.  18    is a diagram illustrating an example electronic device that is folded by an in-folding type according to various embodiments. 
     Referring to  FIG.  18   , an electronic device  1800  according to an embodiment may be an electronic device  1800  that is folded about a folding axis A by an in-folding type. For example, the folding axis A may cross the center of the display  1840  in the vertical direction. According to an embodiment not shown, the folding axis A may cross the center of the display  1840  in the horizontal direction. 
     The electronic device  1800  according to an embodiment may include foldable housings (e.g., a first housing  1810  and a second housing  1820 ), a hinge assembly  1830  for connecting the first housing  1810  and the second housing  1820  such that the second housing  1820  is rotatable with respect to the first housing  1810 , and a flexible or foldable display  1840  disposed in the space formed by the foldable housings  1810  and  1820 . 
     In an embodiment, two or more hinge assemblies  1830  may be disposed to allow the display to be folded in substantially the same direction or in different directions. 
     In an embodiment, the display  1840  may range from the first housing  1810  to the second housing  1820  across the hinge assembly  1830 . The display  1840  may be divided into a first display area  1841  disposed in the inner space of the first housing  1810  and a second display area  1842  disposed in the inner space of the second housing  1820 , based on the folding axis A. The hinge assembly  1830  may be implemented by an in-folding type in which the two display areas  1841  and  1842  face each other when the electronic device  1800  converts the state (i.e., the form) thereof from an unfolded state to a folded state. For example, the two display areas  1841  and  1842  may be directed in the same direction when the electronic device  1800  is in the unfolded state, and the two display areas  1841  and  1842  may be rotated in the direction  1860  in which they face each other according to the switching from the unfolded state to the folded state ( 1860 ). 
     In an embodiment, the camera  105  may be disposed on the back surface of (e.g., under) the display  1840 . In an embodiment, the structure in which the display and the camera  105  overlap each other may be the same as or similar to the various embodiments described with reference to  FIG.  1    to  FIG.  17   . 
       FIG.  19    is a diagram illustrating an example electronic device that is folded by an out-folding type according to various embodiments. 
     Referring to  FIG.  19   , an electronic device  1900  according to an embodiment may be an electronic device  1900  that is folded about a folding axis A by an out-folding type. For example, the folding axis A may cross the center of the display  1940  in the vertical direction. According to an embodiment not shown, the folding axis A may cross the center of the display  1940  in the horizontal direction. 
     The electronic device  1900  according to an embodiment may include foldable housings (e.g., a first housing  1910  and a second housing  1920 ), a hinge assembly  1930 , and a display  1940  disposed in the space formed by the foldable housings  1910  and  1920 . The display  1940  may be divided into a first display area  1941  disposed in the inner space of the first housing  1910  and a second display area  1942  disposed in the inner space of the second housing  1920 , based on the folding axis A. 
     The hinge assembly  1930  may be implemented by an out-folding type in which the two display areas  1941  and  1942  are directed in opposite directions to each other when the electronic device  1900  converts the state thereof from an unfolded state to a folded state. For example, the two display areas  1941  and  1942  may face in the same direction when the electronic device  1900  is in the unfolded state, and the two display areas  1941  and  1942  may be rotated in the direction in which they are directed in opposite directions to each other according to the switching from the unfolded state to the folded state ( 1960 ). 
     In an embodiment, two or more hinge assemblies  1930  may be disposed to allow the display to be folded in substantially the same direction or in different directions. 
     In an embodiment, the camera  105  may be disposed on the back surface of (e.g., under) the display  1940 . In an embodiment, the structure in which the display and the camera  105  overlap each other may be the same as or similar to the various embodiments described with reference to  FIG.  1    to  FIG.  17   . 
       FIG.  20    is a diagram illustrating an example electronic device including a rollable display according to various embodiments. 
     Referring to  FIG.  20   , the electronic device  2000  according to an embodiment may include a rollable display  2010  including a housing  220  of which the length of at least a portion is variable so that the area or width exposed to the outside is adjustable by the variable length of the housing  220 . 
     In an embodiment, the housing  220  may include a first side member  2021  that is fixed, and a second side member  2023  that is located to be movable on the opposite side of the first side member  2021 . For example, the first side member  2021  may be disposed in the direction x 1  from the display  2010  to then be fixed. For example, the second side member  2023  may be disposed in the direction x 2  from the display  2010 , and may slide to move in the direction x 2 . The exposed area or width of the display  2010  may vary with the movement of the second side member  2023  in the direction x 2 . 
     According to an embodiment, the display  2010  may include a flexible substrate (e.g., the substrate  512  in  FIG.  17   ), and the exposed width thereof may be adjusted based on the movement of the second side member  2023 . For example, as shown by the arrow  2001  in  FIG.  20   , the second side member  2023  may move in the direction x 2 , thereby increasing the exposed width of the display. For example, the second side member  2023  may move in the direction x 1 , thereby reducing the exposed width of the display  2010 . 
     Assuming that the exposed width of the display  2010  is a first width W 1  and the maximum width by which the second side member  2023  is able to move in the direction x 2  is a second width W 2  in the case where the first side member  2021  and the second side member  2023  are closest to each other, the minimum width of the display  2010  and the maximum width of the display  2010  may be as follows.
         Minimum width of display  2010 : First width W 1 ,   Maximum width of display  2010 : Sum of first width W 1  and second width W 2 .       

     Although it has been described in the illustrated example that the first side member  2021  is fixed and the second side member  2023  is movable in the direction x 2 , they are not limited thereto, and the first side member  2021  may also be movable. For example, the first side member  2021  may move in the direction x 1 , and the exposed width of the display  2010  may increase in the direction x 1 , based on the movement of the first side member  2021 . 
     Although it has been described in the illustrated example that the second side member  2023  is movable in the direction x 2 , it is not limited thereto, and the second side member  2023  may move in the direction y 1  or the direction y 2 . In this case, the exposed width of the display  2010  may increase in the direction y 1  or the direction y 2 , based on the movement of the second side member  2023 . 
     In an embodiment shown in  FIG.  20   , a camera  105  may be disposed on the back surface of (e.g., under) the display  2010 . For example, the camera  105  may be arranged in the area in which the display  2010  is fixed to be exposed. For example, the position of the camera  105  may be arranged to be fixed regardless of the width of the display  2010 . In an embodiment, the structure in which the display  2010  and the camera  105  overlap each other may be the same as or similar to the various embodiments described with reference to  FIG.  1    to  FIG.  17   . 
     While the disclosure has been illustrated and described with reference to various example embodiments, it will be understood that the various example embodiments are intended to be illustrative, not limiting. It will be further understood by those skilled in the art that various changes in form and detail may be made without departing from the true spirit and full scope of the disclosure, including the appended claims and their equivalents.