Abstract:
The described technology relates generally to a display device, and the display device according to an exemplary embodiment includes: a main panel; an auxiliary panel positioned at two opposing edges of the main panel; and a cover glass covering a front surface of the main panel and the auxiliary panel, wherein the auxiliary panel has a curved shape.

Description:
RELATED APPLICATIONS 
       [0001]    This application claims priority to and the benefit of Korean Patent Application No. 10-2015-0113267 filed in the Korean Intellectual Property Office on Aug. 11, 2015, the entire contents of which are incorporated herein by reference. 
       BACKGROUND 
       [0002]    1. Field 
         [0003]    The described technology relates generally to a display device. 
         [0004]    2. Description of the Related Art 
         [0005]    A liquid crystal display (LCD) generally includes two display panels on which field generating electrodes, such as a pixel electrode and a common electrode, are formed, and a liquid crystal layer interposed between the two display panels. When a voltage is applied to the field generating electrodes to generate an electric field on the liquid crystal layer, the orientation of liquid crystal molecules of the liquid crystal layer is determined, and the polarization of incident light is controlled through the generated electric field to display an image. 
         [0006]    The two display panels forming the liquid crystal display may be a thin film transistor array panel and an opposing display panel. In the thin film transistor array panel, a gate line transmitting a gate signal and a data line transmitting a data signal are formed to be crossed, and a thin film transistor connected to the gate line and the data line and a pixel electrode connected to the thin film transistor may be formed. The opposing display panel may include a light blocking member, a color filter, a common electrode, etc. In some cases, the light blocking member, the color filter, and the common electrode may be formed in the thin film transistor array panel. 
         [0007]    The liquid crystal display may be manufactured with a large display area to be used as a TV. In this case, the edge of the TV may be taken advantage of as a secondary region to display a channel, a volume, or a subtitle, and this edge may be bent to form a curved shape. However, a process of bending the conventional liquid crystal display for the edge portion to have the curved shape is not easy. 
         [0008]    The above information disclosed in this Background section is only for enhancement of understanding of the background of the described technology and therefore may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. 
       SUMMARY 
       [0009]    The present disclosure provides a display device having an edge with a curved shape. 
         [0010]    A display device according to an exemplary embodiment includes: a main panel; an auxiliary panel positioned at two opposing edges of the main panel; and a cover glass covering a front surface of the main panel and the auxiliary panel, wherein the auxiliary panel has a curved shape. 
         [0011]    The main panel may have a flat shape. 
         [0012]    The cover glass may include a main region covering the main panel and an auxiliary region covering the auxiliary panel, the main region may have the flat shape, and the auxiliary region may have the curved shape. 
         [0013]    The main panel may be made of a liquid crystal panel or an organic light emitting panel. 
         [0014]    The liquid crystal panel may include a substrate, a thin film transistor positioned on the substrate, a pixel electrode connected to the thin film transistor, a roof layer positioned to be separated from the pixel electrode via a plurality of microcavities on the pixel electrode, a liquid crystal layer filling the microcavities, and an overcoat positioned on the roof layer and sealing the microcavities. 
         [0015]    The auxiliary panel may be formed of at least one of the liquid crystal panel, the organic light emitting panel, and the light emitting diode (LED) panel. 
         [0016]    The main panel and the auxiliary panel may be integrally formed. 
         [0017]    The main panel may have the curved shape. 
         [0018]    The bending direction of the main panel and the bending direction of the auxiliary panel may be different. 
         [0019]    The main panel may have a concave curved surface in a front view, and the auxiliary panel may have a convex curved surface in a front view. 
         [0020]    The cover glass may include a main region covering the main panel and an auxiliary region covering the auxiliary panel, and the main region and the auxiliary region may have the curved shape. 
         [0021]    The bending direction of the main region and the bending direction of the auxiliary region may be different. 
         [0022]    The main region may have the concave curved surface in a front view, and the auxiliary region may have the convex curved surface in a front view. 
         [0023]    The main panel may be formed of the liquid crystal panel or the organic light emitting panel. 
         [0024]    The liquid crystal panel may include a substrate, a thin film transistor positioned on the substrate, a pixel electrode connected to the thin film transistor, a roof layer positioned to be separated from the pixel electrode via a plurality of microcavities on the pixel electrode, a liquid crystal layer filling the microcavities, and an overcoat positioned on the roof layer and sealing the microcavities. 
         [0025]    The auxiliary panel may be formed of at least one of the liquid crystal panel, the organic light emitting panel, and the light emitting diode (LED) panel. 
         [0026]    The main panel and the auxiliary panel may be integrally formed. 
         [0027]    The cover glass may be formed of a tempered glass. 
         [0028]    The display device may be used as a TV. 
         [0029]    The auxiliary panel may display at least one among a channel, a volume, a subtitle, an e-mail, an internet icon, or a biorhythm, or is used as a lamp. 
         [0030]    The display device according to an exemplary embodiment has the following effects. 
         [0031]    In the display device according to an exemplary embodiment, by separately forming the main panel and the auxiliary panel and adhering them to the cover glass, the display device having the edge of the curved shape may be easily manufactured. 
         [0032]    Also, by integrally forming the main panel and the auxiliary panel by using the liquid crystal panel and the organic light emitting panel including the single substrate, the display device having the edge of the curved shape may be easily manufactured. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0033]      FIG. 1  is a perspective view of a display device according to an exemplary embodiment. 
           [0034]      FIG. 2  is a top view of a display device according to an exemplary embodiment. 
           [0035]      FIG. 3  is an exploded perspective view of a display device according to an exemplary embodiment. 
           [0036]      FIG. 4  is a top plan view of a partial panel of a display device according to an exemplary embodiment. 
           [0037]      FIG. 5  is a cross-sectional view of a partial panel of a display device according to an exemplary embodiment taken along a line V-V of  FIG. 4 . 
           [0038]      FIG. 6  is a top plan view of a partial panel of a display device according to an exemplary embodiment. 
           [0039]      FIG. 7  is a cross-sectional view of a partial panel of a display device according to an exemplary embodiment taken along a line VII-VII of  FIG. 6 . 
           [0040]      FIG. 8  is a top plan view of a partial panel of a display device according to an exemplary embodiment. 
           [0041]      FIG. 9  is a top plan view of a partial pixel of a partial panel of a display device according to an exemplary embodiment. 
           [0042]      FIG. 10  is a cross-sectional view of a partial panel of a display device according to an exemplary embodiment taken along a line X-X of  FIG. 9 . 
           [0043]      FIG. 11  is a cross-sectional view of a partial panel of a display device according to an exemplary embodiment taken along a line XI-XI of  FIG. 9 . 
           [0044]      FIG. 12  is a perspective view of a display device according to an exemplary embodiment. 
           [0045]      FIG. 13  is a top view of a display device according to an exemplary embodiment. 
           [0046]      FIG. 14  is an exploded perspective view of a display device according to an exemplary embodiment. 
           [0047]      FIG. 15  is a perspective view of a display device according to an exemplary embodiment. 
           [0048]      FIG. 16  is a top view of a display device according to an exemplary embodiment. 
           [0049]      FIG. 17  is an exploded perspective view of a display device according to an exemplary embodiment. 
           [0050]      FIG. 18  is a perspective view of a display device according to an exemplary embodiment. 
           [0051]      FIG. 19  is a top view of a display device according to an exemplary embodiment. 
           [0052]      FIG. 20  is an exploded perspective view of a display device according to an exemplary embodiment. 
       
    
    
     DETAILED DESCRIPTION 
       [0053]    The present system and method are described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the present system and method are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present disclosure. 
         [0054]    In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like reference numerals designate like elements throughout the specification. It is understood that when an element such as a layer, film, region, or substrate is referred to as being “on” another element, it may be directly on the other element, or intervening elements may also be present. In contrast, when an element is referred to as being “directly on” another element, there are no intervening elements present. 
         [0055]    First, a display device according to an exemplary embodiment is described with reference to  FIG. 1  to  FIG. 3 . 
         [0056]      FIG. 1  is a perspective view of a display device according to an exemplary embodiment,  FIG. 2  is a top view of a display device according to an exemplary embodiment, and  FIG. 3  is an exploded perspective view of a display device according to an exemplary embodiment. 
         [0057]    As shown in  FIG. 1  to  FIG. 3 , the display device according to an exemplary embodiment includes a main panel  1200  and an auxiliary panel  1300 . 
         [0058]    The main panel  1200  may have a flat shape. The main panel  1200  may be a liquid crystal panel or an organic light emitting diode display panel. The liquid crystal panel may have a structure in which a liquid crystal layer is positioned between two substrates. Also, the liquid crystal panel may be made of a single substrate. In this case, the liquid crystal panel may have a structure in which a plurality of microcavities are formed on one sheet substrate, the liquid crystal layer is positioned in the microcavities, and the microcavities are sealed by an overcoat. The structure of the liquid crystal panel and the organic light emitting panel is described in detail with reference to  FIG. 4  to  FIG. 11 . 
         [0059]    The auxiliary panel  1300  may have a curved shape. The auxiliary panel  1300  may be made of a liquid crystal panel, organic light emitting panel, or light emitting diode (LED) panel. In this case, the auxiliary panel  1300  includes a substrate of a material that may be bent such as a plastic. In the case of the liquid crystal panel including two sheet substrates, since it is not easy to realize the curved shape, it may be beneficial if the auxiliary panel  1300  is made of a liquid crystal panel, an organic light emitting panel, or a light emitting diode (LED) panel that is formed as a single substrate. However, the present disclosure is not limited thereto, and the auxiliary panel  1300  may be made of various display panels that may easily realize the curved shape. 
         [0060]    The main panel  1200  may be positioned at the center, and the auxiliary panel  1300  may be positioned on opposing edges of the main panel  1200 . However, the present disclosure is not limited thereto, and the position of the auxiliary panel  1300  may be variously changed. For example, the auxiliary panel  1300  may be positioned on an upper edge and/or a lower edge of the main panel  1200 . Also, the auxiliary panel  1300  may be positioned on three or more edges of the main panel  1200 . 
         [0061]    The display device according to an exemplary embodiment may be manufactured with a large area to be used as a TV. In this case, the main panel  1200  may display a motion picture, such as a movie, a drama, or news. The auxiliary panel  1300  may display other ancillary information. For example, the auxiliary panel  1300  may display a channel, a volume, subtitles, an e-mail, an internet icon, a biorhythm, etc. Also, the auxiliary panel  1300  may be used as a lamp. 
         [0062]    The auxiliary panel  1300  may display additional information related thereto when displaying the motion picture on the main panel  1200 . For example, the information of the motion picture, such as the channel, the volume, or the subtitles, that are displayed on the main panel  1200  may be displayed on the auxiliary panel  1300 . The auxiliary panel  1300  may display the additional information separately regardless of the image displayed on the main panel  1200 . For example, the user may check a transmitted mailbox, such as a personal email, through the auxiliary panel  1300 , and may write and transmit the email. The auxiliary panel  1300  may display various application program (APP, applications). The auxiliary panel  1300  may also be used when the main panel  1200  is in an off state. For example, when the main panel  1200  is in the off state, the auxiliary panel  1300  may be used as the lamp. That is, the main panel  1200  and the auxiliary panel  1300  may be used to work together, or may be independently used, respectively. 
         [0063]    The display device according to an exemplary embodiment may further include a cover glass  1100  covering the main panel  1200  and a front surface of the auxiliary panel  1300 . 
         [0064]    The cover glass  1100  includes a main region MD and an auxiliary region SD. The main region MD covers the front surface of the main panel  1200 , and the auxiliary region SD covers the front surface of the auxiliary panel  1300 . Accordingly, the main region MD of the cover glass  1100  may contact the main panel  1200 , and the auxiliary region SD may contact the auxiliary panel  1300 . 
         [0065]    The cover glass  1100  may be made of a transparent and solid material. For example, the cover glass  1100  may be made of a tempered glass, and may be made of Gorilla Glass manufactured by Corning Co. The cover glass  1100  covers the front surface of the main panel  1200  and the auxiliary panel  1300 , that is, the surfaces in which the image is displayed, thereby it may be beneficial if the cover glass  1100  is made of a material having high transmittance. Also, since the cover glass  1100  serves to protect the front surface of the main panel  1200  and the auxiliary panel  1300 , it may be beneficial if the cover glass  1100  is made of a solid and durable material. 
         [0066]    Next, a method manufacturing the display device according to an exemplary embodiment is described as follows. 
         [0067]    Firstly, heat is applied to the tempered glass made of a flat substrate to mold the edge to have the curved surface, thereby preparing the cover glass  1100 . 
         [0068]    Next, the main panel  1200  having the flat shape is adhered to the cover glass  1100 . The main panel  1200  may be adhered to the cover glass  1100  by using a transparent adhesive material. The adhesive material may be made of an OCA (optical clear adhesive), an OCR (optical clear resin), or a transparent adhesive sheet. 
         [0069]    Next, the auxiliary panel  1300  having the curved shape is adhered to the cover glass  1100 . The auxiliary panel  1300  may be adhered to the cover glass  1100  by using a transparent adhesive material. 
         [0070]    When applying the liquid crystal panel including two substrates to the large-sized TV, it may not be easy to partially bend the edge to realize the curved surface. In the present exemplary embodiment, by adhering the main panel having the flat shape to the main region of the single cover glass and the auxiliary panel having the curved shape to the auxiliary region, the display device in which the edge is partially curved is easily realized. In this case, it may be beneficial if the auxiliary panel having the curved shape is made of a liquid crystal panel, a organic light emitting panel, or a light emitting diode (LED) panel that is formed as a single substrate. 
         [0071]    Next, a partial panel of the display device according to an exemplary embodiment is described with reference to  FIG. 4  and  FIG. 5 .  FIG. 4  and  FIG. 5  show the liquid crystal panel, and particularly, show the liquid crystal panel including two substrates. This may be used as the main panel of the display device according to an exemplary embodiment. 
         [0072]      FIG. 4  is a top plan view of a partial panel of a display device according to an exemplary embodiment, and  FIG. 5  is a cross-sectional view of a partial panel of a display device according to an exemplary embodiment taken along a line V-V of  FIG. 4 . 
         [0073]    As shown in  FIG. 4  and  FIG. 5 , the liquid crystal panel of the display device according to an exemplary embodiment includes a thin film transistor array panel  100  and an opposing display panel  200 , and a liquid crystal layer  3  interposed between the two display panels  100  and  200 . 
         [0074]    Firstly, the thin film transistor array panel  100  is described. 
         [0075]    A gate line  121  and a gate electrode  124  are formed on a first substrate  110  made of a transparent glass or plastic. 
         [0076]    The gate line  121  mainly extends in a horizontal direction and transmits a gate signal. The gate signal may consist of a gate-on voltage and a gate-off voltage. The gate electrode  124  is protruded from the gate line  121 . The gate electrode  124  receives the gate signal through the gate line  121 . 
         [0077]    A gate insulating layer  140  is formed on the gate line  121  and the gate electrode  124 . The gate insulating layer  140  may be made of an inorganic insulating material such as silicon nitride (SiNx) and silicon oxide (SiOx). The gate insulating layer  140  may be made of a single layer or a multilayer. 
         [0078]    A semiconductor  154  is formed on the gate insulating layer  140 . The semiconductor  154  is positioned to overlap the gate electrode  124 . The semiconductor  154  may be made of an amorphous silicon, a polycrystalline silicon, or a metal oxide. 
         [0079]    Ohmic contacts  163  and  165  are formed on the semiconductor  154 . The ohmic contacts may be formed of a material, such as n+ hydrogenated amorphous silicon, in which an n-type impurity is doped at a high concentration, or of a silicide. In some cases, the ohmic contacts  163  and  165  may be omitted. 
         [0080]    A data conductor including a plurality of data lines  171 , a source electrode  173 , and a drain electrode  175  is formed on the ohmic contacts  163  and  165 . 
         [0081]    The data line  171  mainly extends in a longitudinal direction, thereby crossing the gate line  121 , and transmits a data signal. 
         [0082]    The source electrode  173  is protruded from the data line  171  to overlap the gate electrode  124 . The source electrode  173  is formed with a bar shape in the case of  FIG. 4 , however the present disclosure is not limited thereto, and it may have a shape that is bent, such as the shape of the letter “C”. 
         [0083]    The drain electrode  175  is formed to be separated from the source electrode  173  and overlapping the gate electrode  124 . The source electrode  173  faces the drain electrode  175 . When the source electrode  173  is formed with the “C” shape, the source electrode  173  may have a shape enclosing the drain electrode  175 . However, the present disclosure is not limited thereto, and the drain electrode  175  may have a shape that is bent, such as the shape of the letter “C”. 
         [0084]    The gate electrode  124 , the source electrode  173 , and the drain electrode  175  form a thin film transistor (TFT) along with the semiconductor  154 . In this case, the channel of the thin film transistor is formed in the semiconductor  154  in the portion exposed between the source electrode  173  and the drain electrode  175 . 
         [0085]    A passivation layer  180  is formed on the data line  171 , the source electrode  173 , the drain electrode  175 , and the semiconductor  154 . The passivation layer  180  may be made of an organic insulating material or an inorganic insulating material, and may be formed of a single layer or a multilayer. 
         [0086]    The passivation layer  180  has a contact hole  181 . The contact hole  181  may expose at least a portion of the thin film transistor, particularly at least a portion of the drain electrode  175 . 
         [0087]    A pixel electrode  191  is formed on the passivation layer  180 . The pixel electrode  191  may be made of a transparent metal oxide such as indium tin oxide (ITO) or indium zinc oxide (IZO). The pixel electrode  191  may be made with a rectangular shape approximately including two long sides and two short sides. However, the shape of the pixel electrode  191  is not limited thereto, and may be variously changed. Furthermore, the pixel electrode  191  may be made with a shape having a transverse stem, a longitudinal stem, and a plurality of minute branches extending therefrom. Also, one pixel electrode  191  may be divided into two to form sub-pixel electrodes. In this case, voltages applied to the two sub-pixel electrodes may be different to improve visibility, and the arrangement of thin film transistors connected to the two sub-pixel electrodes may be variously changed. 
         [0088]    Although not shown, a lower alignment layer may be formed on the pixel electrode  191  and the passivation layer  180 . A lower polarizer may be formed underneath the first substrate  110 . 
         [0089]    Next the opposing display panel  200  is described. 
         [0090]    A color filter  230  and a light blocking member  220  are formed under a second substrate  210 , which may be made of transparent glass or plastic. 
         [0091]    The liquid crystal panel may include a plurality of pixels, the color filter  230  may be positioned in each pixel, and the light blocking member  220  may be positioned on the boundary of each pixel. The light blocking member  220  may be further formed at a position overlapping the thin film transistor. 
         [0092]    The color filter  230  may be made of a red filter, a green filter, and a blue filter. However, the present disclosure is not limited thereto, and the color filter  230  may be made of a cyan filter, a magenta filter, a yellow filter, and a white color filter. 
         [0093]    The light blocking member  220  is referred to as a black matrix and prevents light leakage. 
         [0094]    A planarizing layer  250  that is made of an organic material to provide the flat surface is formed under the color filter  230  and the black matrix  220 . 
         [0095]    A common electrode  270  is formed under the planarizing layer  250 . The common electrode  270  may be made of a transparent metal oxide such as indium tin oxide (ITO) or indium zinc oxide (IZO). 
         [0096]    In the above, the color filter  230  and the light blocking member  220  are formed in the opposing display panel  200 , however the present disclosure is not limited thereto. The color filter  230  and/or the light blocking member  220  may be formed in the thin film transistor array panel  100 . 
         [0097]    Although not shown, an upper alignment layer may be further formed under the common electrode  270 . Also, an upper polarizer may be further formed on the top surface of the second substrate  210 . Transmissive axes of the lower polarizer and the upper polarizer cross each other. In some cases, one of the two polarizers may be omitted. 
         [0098]    The liquid crystal layer  3  includes a plurality of liquid crystal molecules  310 . The liquid crystal molecules  310  may have positive dielectric anisotropy or negative dielectric anisotropy. The liquid crystal molecules  310  may be initially aligned with a twisted state, or may be initially aligned in the vertical direction or the horizontal direction. 
         [0099]    The common electrode  270  is formed under the second substrate  210 , however the present disclosure is not limited thereto. The common electrode  270  may be formed on the first substrate  110 , and in such case, the liquid crystal molecules  310  may be horizontally aligned. 
         [0100]    Next, a partial panel of the display device according to an exemplary embodiment is described with reference to  FIG. 6  and  FIG. 7 .  FIG. 6  and  FIG. 7  show the organic light emitting panel. This may be used as the main panel or the auxiliary panel of the display device according to an exemplary embodiment. 
         [0101]      FIG. 6  is a top plan view of a partial panel of a display device according to an exemplary embodiment, and  FIG. 7  is a cross-sectional view of a partial panel of a display device according to an exemplary embodiment taken along a line VII-VII of  FIG. 6 . 
         [0102]    As shown in  FIG. 6  and  FIG. 7 , in the organic light emitting panel of the display device according to an exemplary embodiment, a buffer layer  120  is formed on the first substrate  110 . 
         [0103]    The first substrate  110  may be made of a flexible material, and the buffer layer  120  may be made of a single layer of silicon nitride (SiNx) or a dual-layer structure including silicon nitride (SiNx) and silicon oxide (SiOx). The buffer layer  120  prevents the penetration of an unnecessary component, such as an impurity or moisture, and simultaneously serves to planarize the surface. 
         [0104]    A semiconductor  130  is formed on the buffer layer  120 . The semiconductor  130  includes a switching semiconductor  135   a  and a driving semiconductor  135   b  that are separated from each other. The semiconductors  135   a  and  135   b  may be made of a polycrystalline semiconductor material or an oxide semiconductor material. When the semiconductor  130  is formed of the oxide semiconductor material, a separate protection layer to protect the oxide semiconductor material that is vulnerable to the external environment, such as high temperature, may be added. 
         [0105]    The switching semiconductor  135   a  and the driving semiconductor  135   b  are respectively divided into a channel  1355  and a source region  1356  and drain region  1357  formed at respective sides of the channel  1355 . The channel  1355  of the switching semiconductor  135   a  and the driving semiconductor  135   b  is channel-doped with a doping impurity of an n-type or a p-type, and the source region  1356  and the drain region  1357  of the switching semiconductor  135   a  and the driving semiconductor  135   b  are contact doping regions that are contact-doped with a higher doping concentration of the doping impurity than with the channel doping. 
         [0106]    The gate insulating layer  140  is formed on the switching semiconductor  135   a  and the driving semiconductor  135   b . The gate insulating layer  140  may be formed of a single layer or a multilayer including at least one of silicon nitride and silicon oxide. 
         [0107]    A gate line  121 , a driving gate electrode  125   b , and a first storage capacitor plate  128  are formed on the gate insulating film  140 . The gate line  121  extends in the horizontal direction and transmits a scan signal, and includes a switching gate electrode  125   a  protruded from the gate line  121  to overlap the switching semiconductor  135   a . The driving gate electrode  125   b  is protruded from the first storage capacitor plate  128  to overlap the driving semiconductor  135   b . The switching gate electrode  125   a  and the driving gate electrode  125   b  respectively overlap the channel  1355 . 
         [0108]    An interlayer insulating layer  160  is formed on the gate line  121 , the driving gate electrode  125   b , and the first storage capacitor plate  128 . The interlayer insulating layer  160  may be made of an inorganic insulating material such as silicon nitride (SiNx) or silicon oxide (SiOx) like the gate insulating layer  140 . Also, the interlayer insulating layer  160  may be made of an organic insulating material. 
         [0109]    The interlayer insulating layer  160  and the gate insulating layer  140  have a source contact hole  61  and a drain contact hole  62  respectively exposing the source region  1356  and the drain region  1357 , and a storage contact hole  63  exposing a part of the first storage capacitor plate  128 . 
         [0110]    On the interlayer insulating layer  160 , a data line  171  having a switching source electrode  176   a , a driving voltage line  172  having a driving source electrode  176   b  and a second storage capacitor plate  178 , a switching drain electrode  177   a  connected to the first storage capacitor plate  128 , and a driving drain electrode  177   b  are formed. 
         [0111]    The data line  171  transmits the data signal Dm and extends in the direction crossing the gate line  121 . The driving voltage line  172  transmits the driving voltage, is separated from the data line  171 , and extends in the same direction therewith. 
         [0112]    The switching source electrode  176   a  is protruded from the data line  171  to overlap the switching semiconductor  135   a , and the driving source electrode  176   b  is protruded from the driving voltage line  172  to overlap the driving semiconductor  135   b . The switching source electrode  176   a  and the driving source electrode  176   b  are respectively connected to the source region  1356  through the source contact hole  61 . 
         [0113]    The switching drain electrode  177   a  faces the switching source electrode  176   a , the driving drain electrode  177   b  faces the driving source electrode  176   b , and the switching drain electrode  177   a  and the driving drain electrode  177   b  are respectively connected to the drain region  1357  through the drain contact hole  62 . 
         [0114]    The switching drain electrode  177   a  extends to be electrically connected to the first storage capacitor plate  128  and the driving gate electrode  125   b  through the storage contact hole  63  formed in the interlayer insulating layer  160 . 
         [0115]    The second storage capacitor plate  178  is protruded from the data line  171  to overlap the first storage capacitor plate  128 . Accordingly, the first storage capacitor plate  128  and the second storage capacitor plate  178  form the storage capacitor Cst via the interlayer insulating layer  160  as the dielectric material. 
         [0116]    The switching semiconductor  135   a , the switching gate electrode  125   a , the switching source electrode  176   a , and the switching drain electrode  177   a  form the switching transistor T 1 , and the driving semiconductor  135   b , the driving gate electrode  125   b , the driving source electrode  176   b , and the driving drain electrode  177   b  form the driving transistor T 2 . 
         [0117]    The passivation layer  180  is formed on the switching source electrode  176   a , the driving source electrode  176   b , the switching drain electrode  177   a , and the driving drain electrode  177   b.    
         [0118]    A pixel electrode  710  is formed on the passivation layer  180 , and the pixel electrode  710  may be made of a transparent conductive material, such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium oxide (In2O3), or a reflective metal, such as lithium (Li), calcium (Ca), lithium fluoride/calcium (LiF/Ca), lithium fluoride/aluminum (LiF/Al), aluminum (Al), silver (Ag), magnesium (Mg), or gold (Au). The pixel electrode  710  is electrically connected with the driving drain electrode  177   b  of the driving transistor T 2  through a contact hole  81  formed in the interlayer insulating layer  160  to become an anode of an organic light emitting diode OLED. 
         [0119]    A pixel defining layer  352  is positioned on the passivation layer  180  and an edge of the pixel electrode  710 . The pixel defining layer  352  has a pixel opening  351  exposing the pixel electrode  710 . The pixel defining layer  352  may include a resin, such as a polyacrylate or polyimide, a silica-based inorganic material, and the like. 
         [0120]    An organic emission layer  720  is formed in the pixel opening  351  of the pixel defining layer  352 . The organic emission layer  720  is formed as a multilayer including one or more of an emission layer, a hole-injection layer (HIL), a hole-transporting layer (HTL), an electron-transporting layer (ETL), and an electron-injection layer (EIL). In the case where the organic emission layer  720  includes all the layers, the hole-injection layer is positioned on the pixel electrode  710 , which is an anode, and the hole-transporting layer, the emission layer, the electron-transporting layer, and the electron-injection layer may be sequentially laminated thereon. 
         [0121]    The organic emission layer  720  may include a red organic emission layer emitting red light, a green organic emission layer emitting green light, and a blue organic emission layer emitting blue light. The red organic emission layer, the green organic emission layer, and the blue organic emission layer are formed in a red pixel, a green pixel, and a blue pixel, respectively, thereby implementing a color image. 
         [0122]    Further, the organic emission layer  720  may implement the color image by laminating the red organic emission layer, the green organic emission layer, and the blue organic emission layer together in the red pixel, the green pixel, and the blue pixel, and forming a red color filter, a green color filter, and a blue color filter for each pixel. As another example, white organic emission layers emitting white light are formed in all of the red pixel, the green pixel, and the blue pixel, and a red color filter, a green color filter, and a blue color filter are formed for each pixel, thereby implementing the color image. In the case of implementing the color image by using the white organic emission layer and the color filters, a deposition mask for depositing the red organic emission layer, the green organic emission layer, and the blue organic emission layer on respective pixels, that is, the red pixel, the green pixel, and the blue pixel, may not need to be used. 
         [0123]    A common electrode  730  is formed on the pixel defining layer  352  and the organic emission layer  720 . The common electrode  730  may be made of a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium oxide (In2O3), or a reflective metal such as lithium (Li), calcium (Ca), lithium fluoride/calcium (LiF/Ca), lithium fluoride/aluminum (LiF/Al), aluminum (Al), silver (Ag), magnesium (Mg), or gold (Au). The common electrode  730  becomes the cathode of the organic light emitting diode OLED. The pixel electrode  710 , the organic emission layer  720 , and the common electrode  730  configure the organic light emitting diode OLED. 
         [0124]    Next, a partial panel of the display device according to an exemplary embodiment is described with reference to  FIG. 8  to  FIG. 11 .  FIG. 8  to  FIG. 11  show the liquid crystal panel, and particularly show the liquid crystal panel including the single substrate. This may be used as the main panel or the auxiliary panel of the display device according to an exemplary embodiment. 
         [0125]      FIG. 8  is a top plan view of a partial panel of a display device according to an exemplary embodiment, and  FIG. 9  is a top plan view of a partial pixel of a partial panel of a display device according to an exemplary embodiment.  FIG. 10  is a cross-sectional view of a partial panel of a display device according to an exemplary embodiment taken along a line X-X of  FIG. 9 , and  FIG. 11  is a cross-sectional view of a partial panel of a display device according to an exemplary embodiment taken along a line XI-XI of  FIG. 9 . 
         [0126]    As shown in  FIG. 8 , in the liquid crystal panel of the display device according to an exemplary embodiment, a microcavity  305  covered by a roof layer  360  is formed on the first substrate  110 . 
         [0127]    The first substrate  110  may be made of a flexible material. 
         [0128]    The roof layer  360  extends in a row direction, and a plurality of microcavities  305  are formed below one roof layer  360 . However, the present disclosure is not limited thereto, and the roof layer  360  may extend in a column direction. 
         [0129]    The microcavities  305  may be disposed in a matrix format, a first region V 1  is provided between the adjacent microcavities  305  provided in a column direction, and a second region V 2  is provided between the adjacent microcavities  305  provided in a row direction. 
         [0130]    The first region V 1  is provided between adjacent roof layers  360  of plurality of roof layers  360 . The microcavities  305  may not be covered by the roof layer  360  but may be exposed to the outside at portions contacting the first region V 1 . The portions are referred to as injection holes  307   a  and  307   b.    
         [0131]    The injection holes  307   a  and  307   b  are formed on respective edges of the microcavity  305 . The injection holes  307   a  and  307   b  are configured with a first injection hole  307   a  and a second injection hole  307   b . In detail, the first injection hole  307   a  is formed to expose a side of a first edge of the microcavity  305 , and the second injection hole  307   b  is formed to expose a side of a second edge of the microcavity  305 . The side of the first edge of the microcavity  305  faces the side of the second edge. 
         [0132]    The roof layers  360  are respectively formed to be separate from the substrate  110  between adjacent second regions V 2  to form the microcavities  305 . That is, the roof layers  360  are formed to cover sides other than the sides of the first edge and the second edge on which the injection holes  307   a  and  307   b  are formed. 
         [0133]    The above-described configuration of the display device according to an exemplary embodiment is an example, and various modifications are possible. For example, the dispositions of the microcavity  305 , the first region V 1 , and the second region V 2  are changeable, a plurality of roof layers  360  may be connected to each other in the first region V 1 , and part of the roof layers  360  may be formed to be separate from the substrate  110  in the second region V 2  to connect adjacent microcavities  305 . 
         [0134]    As shown in  FIG. 9  to  FIG. 11 , the gate line  121  and the gate electrode  124  protruded from the gate line  121  are formed on the first substrate  110 . 
         [0135]    The gate line  121  mainly extends in the transverse direction, and transmits the gate signal. The gate line  121  is positioned between the two microcavities  305  that are adjacent in a column direction. That is, the gate line  121  is positioned at the first valley V 1 . The gate electrode  124  protrudes from the gate line  121 . 
         [0136]    The gate insulating layer  140  is formed on the gate line  121  and the gate electrode  124 . The gate insulating layer  140  may be made of an inorganic insulating material such as silicon nitride (SiNx) and silicon oxide (SiOx). Also, the gate insulating layer  140  may be formed of a single layer or a multilayer. 
         [0137]    The semiconductor  154  is formed on the gate insulating layer  140 . The semiconductor  154  may overlap the gate electrode  124 . The semiconductor  154  may be made of amorphous silicon, polycrystalline silicon, or metal oxide. 
         [0138]    The ohmic contacts (not shown) may be formed on the semiconductor  154 . The ohmic contacts may be made of a silicide or of a material of n+ hydrogenated amorphous silicon doped with an n-type impurity at a high concentration. 
         [0139]    On the semiconductor  154  and the gate insulating layer  140 , the data line  171 , the source electrode  173 , and the drain electrode  175  are formed. 
         [0140]    The data line  171  transmits the data signal and mainly extends in the vertical direction thereby crossing the gate line  121 . The data line  171  is positioned between the two microcavities  305  which are adjacent in the row direction. That is, the data line  171  is positioned at the second valley V 2 . 
         [0141]    The source electrode  173  is formed to be protruded from the data line  171  on the gate electrode  124 . That is, at least a portion of the source electrode  173  may overlap the gate electrode  124 . The drain electrode  175  is formed to be separated from the source electrode  173 . At least a portion of the drain electrode  175  may overlap the gate electrode  124 . In the present exemplary embodiment, the source electrode  173  and the drain electrode  175  are formed of the bar shape, however the present disclosure is not limited thereto. The shape of the source electrode  173  and the drain electrode  175  may be variously changed. For example, the source electrode  173  may be formed of a bent shape of the letter “U”, thereby enclosing the drain electrode  175 . In another case, the drain electrode  175  may be formed of the bent shape of the letter “U” enclosing the source electrode  173 . In additional, the source electrode  173  and the drain electrode  175  are partially overlapped with the gate electrode  124 , however the present disclosure is not limited thereto. The source electrode  173  and the drain electrode  175  may not overlap the gate electrode  124 , thereby being separated by a predetermined distance. 
         [0142]    The gate electrode  124 , the source electrode  173 , and the drain electrode  175  form the thin film transistor (TFT) along with the semiconductor  154 . In this case, the channel of the thin film transistor is formed in the semiconductor  154  between the source electrode  173  and the drain electrode  175 . 
         [0143]    The passivation layer  180  is formed on the data line  171 , the source electrode  173 , the drain electrode  175 , and the semiconductor  154 . The passivation layer  180  may be made of an organic insulating material or an inorganic insulating material, and may be formed of a single layer or a multilayer. 
         [0144]    The color filter  230  is formed in each pixel on the passivation layer  180 . 
         [0145]    Each color filter may express one of the primary colors such as three primary colors including red, green, and blue. However, the colors displayed by the color filter  230  are not limited to the three primary colors such as red, green, and blue, and the color filter  230  may express one of cyan, magenta, yellow, and white-based colors. According to an embodiment, the color filter  230  is not formed at the first region V 1  and/or the second region V 2 . 
         [0146]    The light blocking member  220  is formed at a region between the adjacent color filters  230 . The light blocking member  220  is formed on a boundary of the pixel PX and the switching element to prevent light leakage. That is, the light blocking member  220  may be formed in the first valley V 1  and the second valley V 2 . The color filter  230  and the light blocking member  220  may be overlapped in the partial region. 
         [0147]    A first insulating layer  240  may be further formed on the color filter  230  and the light blocking member  220 . The first insulating layer  240  may be formed of an organic insulating material, and may serve to planarize the upper surface of the color filter  230  and the light blocking member  220 . The first insulating layer  240  may be made of a dual layer including a layer made of an organic insulating material and a layer made of an inorganic insulating material. The first insulating layer  240  may be omitted in some cases. 
         [0148]    The passivation layer  180 , the light blocking member  220 , and the first insulating layer  240  have a contact hole  185 . The contact hole  185  exposes at least a portion of the thin film transistor, and particularly exposes at least a portion of the drain electrode  175 . 
         [0149]    The pixel electrode  191  is formed on the first insulating layer  240 . The pixel electrode  191  may be made of a transparent metal oxide such as indium tin oxide (ITO) and indium zinc oxide (IZO). 
         [0150]    The pixel electrode  191  is formed of an approximate rectangle shape having two long sides and two short sides, and has the shape in which the portion overlapping the thin film transistor is chamfered. However, the shape of the pixel electrode  191  is not limited thereto and may be variously changed. Furthermore, the pixel electrode  191  may be made of a shape having a transverse stem, a longitudinal stem, and a plurality of minute branches extending therefrom. Also, one pixel electrode  191  may be divided into two to form sub-pixel electrodes. In this case, the voltages applied to two sub-pixel electrodes may be different to improve visibility, and the arrangement of the thin film transistors connected to the two sub-pixel electrodes may be variously changed. 
         [0151]    The common electrode  270  is formed on the pixel electrode  191  to be separated by a predetermined distance from the pixel electrode  191 . The plurality of microcavities  305  are formed between the pixel electrode  191  and the common electrode  270 . That is, the microcavities  305  are enclosed by the pixel electrode  191  and the common electrode  270 . The common electrode  270  extends in the row direction and is formed over the microcavities  305  and in the second region V 2 . The common electrode  270  is formed to cover part of an upper side and a lateral side of the microcavity  305 . 
         [0152]    The present disclosure, however, is not limited thereto, and the common electrode  270  may be formed between the pixel electrode  191  and the insulating layer. The microcavity  305  may be formed on the common electrode  270 . 
         [0153]    The common electrode  270  may be made of a transparent metal oxide such as indium tin oxide (ITO) or indium zinc oxide (IZO). A predetermined voltage may be applied to the common electrode  270 , and an electric field may be formed between the pixel electrode  191  and the common electrode  270 . 
         [0154]    Alignment layers  11  and  21  are respectively formed above the pixel electrode  191  and below the common electrode  270 . 
         [0155]    The alignment layers  11  and  21  include a first alignment layer  11  and a second alignment layer  21 . The first alignment layer  11  and the second alignment layer  21  may be formed as vertical alignment layers, and may be made of an alignment material such as polyamic acid, polysiloxane, or polyimide. The first and second alignment layers  11  and  21  may be connected on a side wall at an edge of the microcavity  305 . 
         [0156]    The first alignment layer  11  is formed on the pixel electrode  191 . The first alignment layer  11  may be formed directly on a portion of the first insulating layer  240  that is not covered by the pixel electrode  191 . The first alignment layer  11  may also be formed in the first region V 1 . 
         [0157]    The second alignment layer  21  is formed below the common electrode  270  so that it may face the first alignment layer  11 . 
         [0158]    A liquid crystal layer formed with liquid crystal molecules  310  is formed in the microcavity  305  provided between the pixel electrode  191  and the common electrode  270 . The liquid crystal molecules  310  may have negative dielectric anisotropy such that they may stand vertically with respect to the substrate  110  when no electric field is applied. That is, vertical alignment may be performed. However, the present disclosure is not limited thereto, and the liquid crystal molecules may be horizontally aligned. 
         [0159]    The pixel electrode  191  to which the data voltage is applied generates an electric field with the common electrode  270  to determine an alignment direction of the liquid crystal molecules  310  provided in the microcavity  305  between the electrodes  191  and  27 . Luminance of light passing through the liquid crystal layer is changed by the determined alignment direction of the liquid crystal molecules  310 . 
         [0160]    A second insulating layer  350  may be formed on the common electrode  270 . The second insulating layer  350  may be formed with an inorganic insulating material such as silicon nitride (SiNx) or silicon oxide (SiOx), and it may be omitted in certain cases. 
         [0161]    The roof layer  360  is formed on the second insulating layer  350 . The roof layer  360  may be made of an organic material. The roof layer  360  is formed in a row direction, and is formed over the microcavities  305  and in the second region V 2 . The roof layer  360  is formed to cover part of the upper side and the lateral side of the microcavities  305 . The roof layer  360  is made hard by a curing process to maintain the form of the microcavities  305 . The roof layer  360  is formed to be separate from the pixel electrode  191  with the microcavities  305  therebetween. 
         [0162]    The common electrode  270  and the roof layer  360  are formed to not cover part of the lateral side at the edge of the microcavity  305 , and the portions of the microcavity  305  that are not covered by the common electrode  270  and the roof layer  360  are referred to as injection holes  307   a  and  307   b . The injection holes  307   a  and  307   b  consist of a first injection hole  307   a  that exposes a lateral side at the first edge of the microcavity  305  and a second injection hole  307   b  that exposes a lateral side at the second edge of the microcavity  305 . The first edge faces the second edge, and for example, the first edge may be an upper edge of the microcavity  305  and the second edge may be a lower edge of the microcavity  305  on the floor plan. The microcavity  305  is exposed by the injection holes  307   a  and  307   b  in the process of manufacturing a display device so that an aligning agent or a liquid crystal material may be injected into the microcavity  305  through the injection holes  307   a  and  307   b.    
         [0163]    A third insulating layer  370  may be further formed on the roof layer  360 . The third insulating layer  370  may be made of an inorganic insulating material such as silicon nitride (SiNx) or silicon oxide (SiOx). The third insulating layer  370  may be formed to cover the upper side and/or the lateral side of the roof layer  360 . The third insulating layer  370  protects the roof layer  360  made of an organic material, and it may be omitted in certain cases. 
         [0164]    An overcoat  390  (encapsulation layer) is formed on the third insulating layer  370 . The overcoat  390  is formed to cover the injection holes  307   a  and  307   b  where a part of the microcavity  305  is exposed to the outside. That is, the overcoat  390  may seal the microcavity  305  so that the liquid crystal molecules  310  formed in the microcavity  305  are not discharged to the outside. Since the overcoat  390  is in contact with the liquid crystal molecules  310 , it would be beneficial if the overcoat  390  is formed of a material that does not react with the liquid crystal molecules  310 . For example, the overcoat  390  may be formed of parylene or the like. 
         [0165]    The overcoat  390  may be made as a multilayer such as a dual layer or a triple layer. The dual layer includes two layers made of different materials. The triple layer includes three layers, and materials of two adjacent layers are different from each other. For example, the overcoat  390  may include a layer made of an organic insulating material and a layer made of an inorganic insulating material. 
         [0166]    Next, the display device according to an exemplary embodiment is described with reference to  FIG. 12  to  FIG. 14 . 
         [0167]    The display device according to an exemplary embodiment shown in  FIG. 12  to  FIG. 14  is the same as most of the display device according to an exemplary embodiment shown in  FIG. 1  to  FIG. 3 . As such, an overlapping description thereof is omitted. The present exemplary embodiment is different from the previous exemplary embodiment in that the main panel and the auxiliary panel are integrally formed, and this is described as follows. 
         [0168]      FIG. 12  is a perspective view of a display device according to an exemplary embodiment,  FIG. 13  is a top view of a display device according to an exemplary embodiment, and  FIG. 14  is an exploded perspective view of a display device according to an exemplary embodiment. 
         [0169]    As shown in  FIG. 12  to  FIG. 14 , the display device according to an exemplary embodiment includes one panel  2200  in which the main panel and the auxiliary panel are integrally formed. 
         [0170]    The panel  2200  may have a center portion of the flat shape and two edge portions of the curved shape. The panel  2200  may be made of a liquid crystal panel or an organic light emitting panel. It may be beneficial if the edge portion is partially formed of a flexible material to be easily bent in the panel  2200 . For example, like the organic light emitting panel shown in  FIG. 6  and  FIG. 7  and the liquid crystal panel shown in  FIG. 8  to  FIG. 11 , the display panel made of one substrate may undergo the process of only easily bending the partial region. 
         [0171]    The display device according to an exemplary embodiment may further include a cover glass  2100  covering the front surface of the panel  2200 . 
         [0172]    The cover glass  2100  includes a main region MD and an auxiliary region SD. The main region MD of the cover glass  2100  covers the front surface of the center portion of the panel  2200 , and the auxiliary region SD covers the front surface of opposing edges of the panel  2200 . Accordingly, the main region MD of the cover glass  2100  may contact the portion having the flat shape of the panel  2200 , and the auxiliary region SD may contact the portion having the curved shape. 
         [0173]    Next, the display device according to an exemplary embodiment is described with reference to  FIG. 15  to  FIG. 17 . 
         [0174]    The display device according to an exemplary embodiment shown in  FIG. 15  to  FIG. 17  is the same as most of the display device according to an exemplary embodiment shown in  FIG. 1  to  FIG. 3 . As such, an overlapping detailed description thereof is omitted. In the present exemplary embodiment, the main panel has the curved shape, differently from the previous exemplary embodiment, and this is described in detail. 
         [0175]      FIG. 15  is a perspective view of a display device according to an exemplary embodiment,  FIG. 16  is a top view of a display device according to an exemplary embodiment, and  FIG. 17  is an exploded perspective view of a display device according to an exemplary embodiment. 
         [0176]    As shown in  FIG. 15  to  FIG. 17 , the display device according to an exemplary embodiment includes the main panel  3200  and the auxiliary panel  3300 . 
         [0177]    The main panel  3200  may have the curved shape. The main panel  3200  may be formed of a liquid crystal panel, an organic light emitting panel, etc. For example, the main panel  3200  may be formed of the liquid crystal panel shown in  FIG. 4  and  FIG. 5 , the organic light emitting panel shown in  FIG. 6  and  FIG. 7 , or the liquid crystal panel shown in  FIG. 8  to  FIG. 11 . 
         [0178]    The auxiliary panel  3300  may have the curved shape. The auxiliary panel  3300  may be formed of the liquid crystal panel, the organic light emitting panel, the light emitting diode (LED) panel, etc. For example, the auxiliary panel  3300  may be made of the organic light emitting panel shown in  FIG. 6  and  FIG. 7 , or the liquid crystal panel shown in  FIG. 8  to  FIG. 11 . 
         [0179]    In the present exemplary embodiment, the main panel  3200  and the auxiliary panel  3300  both have the curved shape. In this case, the bending direction of the main panel  3200  and the bending direction of the auxiliary panel  3300  are different. For example, the main panel  3200  may have a concave curved surface in a front view, and the auxiliary panel  3300  may have a convex curved surface in a front view. Alternatively, the main panel  3200  may have a convex curved surface in a front view, and the auxiliary panel  3300  may have a concave curved surface in a front view. Also, the curvature of the main panel  3200  and the curvature of the auxiliary panel  3300  may be different. 
         [0180]    The display device according to an exemplary embodiment may further include a cover glass  3100  covering the front surface of the main panel  3200  and the auxiliary panel  3300 . 
         [0181]    The cover glass  3100  includes a main region MD and an auxiliary region SD. The main region MD of the cover glass  3100  covers the front surface of the main panel  3200 , and the auxiliary region SD covers the front surface of the auxiliary panel  3300 . Accordingly, the main region MD of the cover glass  3100  may contact the main panel  3200 , and the auxiliary region SD may contact the auxiliary panel  3300 . 
         [0182]    The bending direction of the main region MD of the cover glass  3100  and the bending direction of the auxiliary region SD are different. For example, the main region MD of the cover glass  3100  may have a concave curved surface in a front view, and the auxiliary region SD may have a convex curved surface in a front view. Alternatively, the main region MD of the cover glass  3100  may have the convex curved surface in a front view, and the auxiliary region SD may have the concave curved surface in a front view. Also, the curvature of the main region MD of the cover glass  3100  and the curvature of the auxiliary region SD may be different. 
         [0183]    The bending direction of the main region MD of the cover glass  3100  and the bending direction of the main panel  3200  are the same. The bending direction of the auxiliary region SD of the cover glass  3100  and the bending direction of the auxiliary panel  3300  are the same. Also, the curvature of the main region MD of the cover glass  3100  and the curvature of the main panel  3200  are substantially the same. The curvature of the auxiliary region SD of the cover glass  3100  and the curvature of the auxiliary panel  3300  are substantially the same. 
         [0184]    When applying the liquid crystal panel including two substrates to the large-sized TV, it may not easy to realize the curved surface having the different bending directions for each region. In the present exemplary embodiment, by adhering the panel having the different directions on the main region and the auxiliary region of the single cover glass, the display device having the curved surface that is bent in the various directions may be easily realized. In this case, the auxiliary panel may be beneficially formed of a liquid crystal panel, a organic light emitting panel, or a light emitting diode (LED) panel that is formed as a single substrate. 
         [0185]    The display device according to an exemplary embodiment is now described with reference to  FIG. 18  to  FIG. 20 . 
         [0186]    The display device according to an exemplary embodiment shown in  FIG. 18  to  FIG. 20  is the same as most of the display device according to an exemplary embodiment shown in  FIG. 15  to  FIG. 17 . In the present exemplary embodiment, the main panel and the auxiliary panel are integrally formed, different from the previous exemplary embodiment. 
         [0187]      FIG. 18  is a perspective view of a display device according to an exemplary embodiment,  FIG. 19  is a top view of a display device according to an exemplary embodiment, and  FIG. 20  is an exploded perspective view of a display device according to an exemplary embodiment. 
         [0188]    As shown in  FIG. 18  to  FIG. 20 , the display device according to an exemplary embodiment includes one panel  4200  in which the main panel and the auxiliary panel are integrated. 
         [0189]    The panel  4200  may have a center portion and two edge portions having the curved shape. In this case, the bending direction of the center portion of the panel  4200  and the bending direction of both edge portions are different. For example, the center portion of the panel  4200  may have a concave curved surface in a front view, and the two edge portions may have a convex curved surface. Alternatively, the center portion of the panel  4200  may have a convex curved surface in a front view, and the two edge portions may have a concave curved surface. Also, the curvature of the center portion of the panel  4200  and the curvature of both edge portions may be different. 
         [0190]    The panel  4200  may be formed of a liquid crystal panel or an organic light emitting panel. It may be beneficial if the center portion and the two edge portions of the panel  4200  are formed of a flexible material in the different directions. For example, the panel  4200  may be formed of the display panel including one substrate like the organic light emitting panel shown in  FIG. 6  and  FIG. 7  or the liquid crystal panel shown in  FIG. 8  to  FIG. 11 . 
         [0191]    The display device according to an exemplary embodiment may further include a cover glass  4100  covering the front surface of the panel  4200 . 
         [0192]    The cover glass  4100  includes a main region MD and an auxiliary region SD. The main region MD of the cover glass  4100  covers the front surface of the center portion of the panel  4200 , and the auxiliary region SD covers the front surface of the two edge portions of the panel  4200 . Accordingly, the main region MD of the cover glass  4100  may contact the center portion of the panel  4200 , and the auxiliary region SD may contact the two edge portions of the panel  4200 . 
         [0193]    The bending direction of the main region MD of the cover glass  4100  and the bending direction of the auxiliary region SD are different. Also, the curvature of the main region MD of the cover glass  4100  and the curvature of the auxiliary region SD may be different. 
         [0194]    The bending direction of the main region MD of the cover glass  4100  and the bending direction of the center portion of the panel  4200  are the same. The bending direction of the auxiliary region SD of the cover glass  4100  and the bending direction of the two edge portions of the panel  4200  are the same. Also, the curvature of the main region MD of the cover glass  4100  and the curvature of the center portion of the panel  4200  are substantially the same. The curvature of the auxiliary region SD of the cover glass  4100  and the curvature of the two edge portions of the panel  4200  are substantially the same. 
         [0195]    While this disclosure has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the disclosure is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. 
       DESCRIPTION OF SYMBOLS 
       [0000]    
       
         
           
               1100 ,  2100 ,  3100 ,  4100 : cover glass 
               1200 ,  3200 : main panel 
               1300 ,  3300 : auxiliary panel 
               2200 ,  4200 : panel