Patent Publication Number: US-2010109511-A1

Title: Organic light emitting display and method of manufacturing the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application relies for priority upon Korean Patent Application No. 2008-107853 filed on Oct. 31, 2008, the contents of which are herein incorporated by reference in their entirety. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates generally to an organic light emitting display capable of displaying a plurality of images and a method of manufacturing the organic light emitting display. 
     2. Related Art 
     In general, an organic light emitting display (OLED) includes a substrate, an anode arranged on the substrate, an emission layer arranged on the anode, and a cathode arranged on the emission layer. When a voltage is applied to the anode and the cathode, holes and electrons are injected into the emission layer, and the injected holes and electrons are recombined with each other in the emission layer, so that excitons are generated. The emission layer emits light using an energy generated when the excitons transition from an excited state to a ground state. Such OLEDs have attracted attention as a next generation flat panel display since the OLED provides certain advantages, such as wide viewing angle, fast response time, and high resolution. 
     SUMMARY 
     One or more embodiments provide an organic light emitting display capable of displaying a plurality of images. 
     One or more embodiments also provide a method of manufacturing the organic light emitting display. 
     In an example embodiment, an organic light emitting display may include a first substrate including a plurality of main-pixel areas each of which may include a plurality of sub-pixel areas and an insulating layer pattern arranged on the first substrate. The insulating layer pattern may include an inclined surface having an inclination angle with respect to the first substrate to correspond to each sub-pixel. A first electrode may be arranged on the inclined surface, an organic light emitting layer may be arranged on the first electrode, and a second electrode may be arranged on the organic light emitting layer. 
     The organic light emitting layer may be inclined with respect to the first substrate depending on an inclination angle between the inclined surface and the first substrate, and thus most of the lights generated from the organic light emitting layer proceed or are transmitted in a direction inclined with respect to the first substrate. Therefore, in embodiments in which the insulating layer pattern includes a plurality of inclined surfaces inclined in directions different from each other, the organic light emitting display may display images in different viewing angles using the light exiting in different directions. 
     In another aspect, a method of manufacturing the organic light emitting display may be provided as follows. A first substrate may be prepared to include a plurality of main-pixel areas each of which may include a plurality of sub-pixel areas, an insulating layer pattern having an inclined surface inclined with respect to the first substrate and corresponding to each of the sub-pixel areas may be formed on the first substrate, a first electrode may be formed on the inclined surface, an organic light emitting layer may be formed on the first electrode, and a second electrode may be formed on the organic light emitting layer 
     The insulating layer pattern having the inclined surface may be formed using an imprint method. Also, the insulating layer pattern may be formed by forming a preliminary insulating layer pattern having a step difference and reflowing the preliminary insulating layer pattern using a heat process. 
     According to the above, the organic light emitting display may display a plurality of images using light that proceeds in different directions corresponding to respective inclined surfaces. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above embodiments and other aspects of the present disclosure will become readily apparent by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein: 
         FIG. 1  is a plan view showing an organic light emitting display in accordance with one or more embodiments; 
         FIG. 2  is an exploded perspective view showing an organic light emitting display in accordance with one or more embodiments; 
         FIG. 3  is a cross-sectional view taken along a line I-I′ of  FIG. 2  in accordance with an embodiment; 
         FIG. 4  is a view showing a viewing angle of an organic light emitting display in accordance with one or more embodiments; 
         FIG. 5  is a circuit diagram showing an organic light emitting display in accordance with one or more embodiments; 
         FIGS. 6 to 8  are sectional views showing a manufacturing method of an organic light emitting display of  FIG. 3  in accordance with one or more embodiments; and 
         FIGS. 9 and 10  are sectional views showing a manufacturing method of an organic light emitting display of  FIG. 3  in accordance with one or more embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     It will be understood that when an element or layer is referred to as being “on”, “connected to” or “coupled to” another element or layer, it may be directly on, connected or coupled to the other element or layer or there may be intervening elements or layers present. In contrast, when an element is referred to as being “directly on,” “directly connected to” or “directly coupled to” another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout. As used herein, the term “and/or” may include any and all combinations of one or more of the associated listed items. 
     It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present disclosure. 
     Spatially relative terms, such as “beneath”, “below”, “lower”, “above”, “upper” and the like, may be used herein for ease of description to describe one element or feature&#39;s relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the term “below” may encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms, “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “includes” and/or “including”, when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 
     Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
     Hereinafter, the present disclosure will be explained in detail with reference to the accompanying drawings. 
       FIG. 1  is a plan view showing an organic light emitting display in accordance with one or more embodiments. In the present embodiment, for example, a display substrate for the organic light emitting display may include a plurality of pixels, however, since the pixels have the same structure and function, some parts of the pixels will be described in  FIG. 1 , and thus others will be omitted. 
     Referring to  FIG. 1 , an organic light emitting display (OLED)  500  may include a display substrate  200  and an opposite substrate  400 . The display substrate  200  may include a plurality of main-pixel areas. Two main-pixel areas adjacent to each other may be spaced apart from each other while interposing a second boundary area BA 2  therebetween, and each main-pixel area may include two sub-color pixels that are spaced apart from each other. 
     Light exiting to an exterior after passing through the two sub-color pixels arranged in one main-pixel area have the same color. For instance, a first main-pixel area M_PA 1  may include a first sub-pixel area S_PA 1  and a second sub-pixel area S_PA 2  spaced apart from the first sub-pixel area S_PA 1  while interposing a first boundary area BA 1  between the first and second sub-pixel areas S_PA 1  and S_PA 2 , and a first red color pixel RI and a second red color pixel R 2 , which are arranged in the first sub-pixel area S_PA 1  and the second sub-pixel area S_PA 2 , respectively, generate red light. 
     Meanwhile, a second main-pixel area M_PA 2  may include two sub-pixel areas, and a first green color pixel G 1  and a second green color pixel G 2  may be arranged in the two sub-pixel areas, respectively, to generate green light. In addition, a third main-pixel area M_PA 3  may include two sub-pixel areas, and a first blue color pixel B 1  and a second blue color pixel B 2  may be arranged in the two sub-pixel areas, respectively, to generate blue light. 
     The main-pixel areas may be arranged in a matrix configuration along a row direction as a first direction D 1  and a column direction as a second direction D 2  substantially perpendicular to the first direction D 1 . For instance, in a row including the first main-pixel area M_PA 1 , the first main-pixel area M_PA 1  generating the red light, the second main-pixel area M-PA 2  generating the green light, and the third main-pixel area M_PA 3  generating the blue light may be sequentially arranged along the first direction D 1 . That is, in any row of the matrix configuration of the main-pixel areas, two adjacent main-pixel areas in the first direction D 1  may generate different colors of light from each other. 
     In addition, in a column including the first main-pixel area M_PA 1 , the first main-pixel area M_PA 1  generating red light, a forth main-pixel area M_PA 4  generating red light, and a fifth main-pixel area M_PA 5  generating red light may be sequentially arranged along the second direction D 2 . That is, in any column of the matrix configuration of the main-pixel areas, color pixels of the main-pixel areas arranged in one column may generate the same color. 
     The opposite substrate  400  may be coupled with the display substrate  200  to face the display substrate  200 . The opposite substrate  400  may include a second substrate  300  (shown in  FIG. 2 ) and a plurality of light blocking layers arranged on the second substrate  300 . The light blocking layers include a metal material, such as chromium, magnesium, or the like, to block the light. 
     The light blocking layers may include a first light blocking layer BM 1 , a second light blocking layer BM 2 , and a third light blocking layer BM 3 . The first to third light blocking layers BM 1 , BM 2 , and BM 3  may be spaced apart from each other and may extend in the second direction D 2 . Each of the first to third light blocking layers BM 1 , BM 2 , and BM 3  may overlap main-pixel areas arranged in the second direction D 2 . For instance, the first light blocking layer BM 1  may overlap the first main-pixel area M_PA 1 , the fourth main-pixel area M_PA 4 , and the fifth main-pixel area M_PA 5  that are arranged in the column including the first main-pixel area M_PA 1 . More particularly, the first light blocking layer BM 1  may mainly overlap the first boundary area BA 1 , a boundary area between two red color pixels R 1  and R 2  arranged in the fourth main-pixel area M_PA 4 , and a boundary area between two red color pixels R 1  and R 2  arranged in the fifth main-pixel area M_PA 5 . 
     The first to third light blocking layers BM 1 , BM 2 , and BM 3  may block light that proceed in or are transmitted in a certain direction among lights generated from the main-pixel areas. For example, transmission directions of the light generated from the first red color pixel R 1  and the second red color pixel R 2  arranged in the first sub-pixel area S_PA 1  and the second sub-pixel area S_PA 2 , respectively, may be decided at random, however, the first light blocking layer BM 1  may prevent the light generated from the first and second red color pixels R 1  and R 2  from exiting to the exterior through the first boundary area BA 1 . Thus, although the first and second red color pixels R 1  and R 2  generate light having the same color, the mixture of the red light generated from the first red color pixel R 1  and the red light generated from the second red color pixel R 2  may be prevented from exiting outward. 
       FIG. 2  is an exploded perspective view showing the organic light emitting display in accordance with one or more embodiments, and  FIG. 3  is a cross-sectional view taken along a line I-I′ of  FIG. 2  in accordance with an embodiment.  FIG. 2  shows the color pixels inclined with respect to the first substrate  100 . 
     Referring to  FIGS. 2 and 3 , the display substrate  200  may include a first substrate  100 , the first red color pixel R 1  arranged in the first sub-pixel area S_PA 1  of the first substrate  100 , a first driving transistor TR 1  electrically connected to the first red color pixel R 1 , the second red color pixel R 2  arranged in the second sub-pixel area S_PA 2  of the first substrate  100 , and a second driving transistor TR 2  electrically connected to the second red color pixel R 2 . 
     A blocking layer  110  may be arranged on the first substrate  100 . The blocking layer  110  may include an insulating material, such as silicon oxide or silicon nitride, to prevent ions eluted from the first substrate  100  from being diffused toward other elements arranged on the first substrate  100 . 
     In the present embodiment, for example, the first driving transistor TR 1  may be a polysilicon type thin film transistor, and the first driving transistor TR 1  may be electrically connected to the first red color pixel R 1  to switch a power voltage that drives the first red color pixel R 1 . 
     The first driving transistor TR 1  may include a first gate electrode GE 1 , a first source electrode SE 1 , a first drain electrode DE 1 , and a first active pattern AP 1 . Also, the first driving transistor TR 1  may be electrically connected to a first switching transistor S_TRL (shown in  FIG. 5 ), and an operation of the first driving transistor TR 1  may be switched by the first switching transistor S_TR 1 . 
     The first active pattern AP 1  may include a semiconductor material, such as polysilicon, and the first active pattern AP 1  may be arranged on the blocking layer  110 . Also, the first gate electrode GE 1  may be arranged on the first active pattern AP 1  while interposing a gate insulating layer  115  therebetween, and the first gate electrode GE 1  may be electrically connected to a drain electrode  13  (shown in  FIG. 5 ) of the first switching transistor S_TRL (shown in  FIG. 5 ). An inter-insulating layer  120  may be arranged on the first gate electrode GE 1 , and the gate insulating layer  115  and the inter-insulting layer  120  may be partially removed such that the first source electrode SE 1  and the first drain electrode DE 1  make contact with the first active pattern AP 1 . 
     The first source electrode SE 1  may branch from a first power voltage line BL 1  (shown in  FIG. 5 ) and may receive the power voltage from the first power voltage line BL 1 . Thus, when the first driving transistor TR 1  is turned on by the first switching transistor S_TR 1 , the power voltage provided from the first power voltage line BL 1  may be applied to the first drain electrode DE 1  from the first source electrode SE 1  through the first active pattern AP 1 . 
     The second driving transistor TR 2  may include a second gate electrode GE 2 , a second source electrode SE 2 , a second drain electrode DE 2 , and a second active pattern AP 2 . As the first driving transistor TR 1  switches the power voltage provided to the first red color pixel R 1 , the second driving transistor TR 2  switches the power voltage provided to the second red color pixel R 2  that is electrically connected to the second driving transistor TR 2 . 
     The second gate electrode GE 2  may be electrically connected to a drain electrode of a second switching transistor S_TR 2  (shown in  FIG. 5 ), and the second source electrode SE 2  may branch from a second power voltage line BL 2  (shown in  FIG. 5 ). Thus, when the second driving transistor TR 2  is turned on by the second switching transistor S_TR 2 , the power voltage provided from the second power voltage line BL 2  may be applied to the second drain electrode DE 2  from the second source electrode SE 2  through the second active pattern AP 2 . 
     As described above, the switching transistor controlling the operation of the first driving transistor TR 1  may be different from the switching transistor controlling the operation of the second driving transistor TR 2 . Therefore, the power voltage used to drive the first red color pixel R 1  and the power voltage used to drive the second red color pixel R 2  may be individually controlled. More detailed descriptions of the individual control to the color pixels will be described with reference to  FIG. 5 . 
     A protective layer  130  may be arranged on the first and second driving transistors TR 1  and TR 2  to protect the first and second driving transistors TR 1  and TR 2  from external impacts. An insulating layer pattern  140  may be arranged on the protective layer  130 . The insulating layer pattern  140  may include a first inclined surface  141  and a second inclined surface  142 . More particularly, when viewed in cross-sectional, a thickness of the insulating layer pattern  140  may gradually decrease from the first boundary area BA 1  to the first sub-pixel area S_PA 1  to define the first inclined surface  141 , and the thickness of the insulating layer pattern  140  may gradually decrease from the first boundary area BA 1  to the second sub-pixel area S_PA 2  to define the second inclined surface  142 . 
     Thus, the insulating layer pattern  140  may have a maximum thickness in the first boundary area BA 1 , and as a result, the insulating layer pattern  140  may have a mountain shape corresponding to the first boundary area BA 1 . In addition, the insulating layer pattern  140  may have a minimum thickness in the second boundary area BA 2 , and thus, the insulating layer pattern  140  may have a valley shape corresponding to the second boundary area BA 2 . 
     When an angle between the first inclined surface  141  and the first substrate  100  is referred to as a first angle θ 1  and an angle between the second inclined surface  142  and the first substrate  100  is referred to as a second angle θ 2 , the first angle θ 1  may be about 10 degrees to about 80 degrees and the second angle θ 2  may be about 100 degrees to about 170 degrees. 
     The protective layer  130  and the insulating layer pattern  140  may be partially removed to form a first contact hole CH 1  and a second contact hole CH 2  therethrough. A first positive electrode AE 1  may be arranged in the first contact hole CH 1 , and a second positive electrode AE 2  may be arranged in the second contact hole CH 2 . Also, the first positive electrode AE 1  may be electrically connected to the first drain electrode DE 1  and arranged in the first inclined surface  141 , and the second positive electrode AE 2  may be electrically connected to the second drain electrode DE 2  and arranged in the second inclined surface  142 . 
     A first organic light emitting layer EL 1  may be arranged on the first positive electrode AE 1 , and a second organic light emitting layer EL 2  may be arranged on the second positive electrode AE 2 . Also, a negative electrode CE may be arranged on the first and second positive electrodes AE 1  and AE 2  to receive a common voltage Vcom (shown in  FIG. 5 ). The first organic light emitting layer EL 1  may generate red light using a current flowing between the first positive electrode AE 1  and the negative electrode CE, and the second organic light emitting layer EL 2  may generate red light using the current flowing between the second positive electrode AE 2  and the negative electrode CE. The red lights generated from the first and second organic light emitting layers EL 1  and EL 2  may exit to an upper portion of the second substrate  300  after passing through the negative electrode CE. 
     Meanwhile, amounts of the lights generated from the first and second organic light emitting layers EL 1  and EL 2  may depend on the transmission directions of the lights. For instance, when assuming that a first light L 1 , a second light L 2 , and a third light L 3  may be generated from the second organic light emitting layer EL 2 , the first light L 1  proceeds or is transmitted in a direction at a right angle with respect to an upper surface  150  of the second organic light emitting layer EL 2 , the second light L 2  proceeds or is transmitted in a direction at an angle of about 60 degrees to about 120 degrees with respect to the upper surface  150 , and the third light L 3  proceeds or is transmitted in a direction at an angle of about 30 degrees to about 150 degrees with respect to the upper surface  150 , the amount of the second light L 2  may be greater than the amount of the third light L 3 , and the amount of the first light L 1  may be greater than the amount of the second light L 2 . 
     More particularly, the amount of the second light L 2  may be about 87% of the amount of the first light L 1 , and the amount of the third light L 3  may be about 50% of the amount of the first light L 1 . Although not shown in  FIG. 3 , the amount of the light generated from the second organic light emitting layer EL 2  and proceeding or being transmitted in a direction at an angle of about 5 degrees to about 175 degrees with respect to the upper surface  150  may be about 9% of the amount of the first light L 1 . That is, the amount of the light emitted from the second organic light emitting layer EL 2  increases as the angle between the upper surface  150  and the transmission direction may be closer to the right angle with respect to the upper surface  150 . 
     Thus, when a user perceives the red light generated from the second red color pixel R 2 , the first light L 1  may contribute more than the second light L 2  and the third light L 3  such that the user may perceive the red light generated from the second red color pixel R 2 . This means that a main viewing angle of the second red color pixel R 2  may be determined according to the transmission direction of the first light L 1 . Meanwhile, as described above, the first light L 1  proceeds or is transmitted at a right angle with respect to the upper surface  150 , and an angle between the upper surface  150  and the first substrate  100  may depend upon an angle between the second inclined surface  142  and the first substrate  100 . Therefore, the main viewing angle of the second red color pixel R 2  may be adjusted by changing the second angle θ 2  between the second inclined surface  142  and the first substrate  100 . 
     Similar to the light emitted from the second organic light emitting layer EL 2 , an amount of the light emitted from the first organic light emitting layer EL 1  increases as an angle between the upper surface of the first organic light emitting layer EL 1  and the transmission direction may be closer to the right angle with respect to the upper surface of the first organic light emitting layer EL 1 . Thus, the main viewing angle of the first red color pixel R 1  including the first organic light emitting layer EL 1  may be adjusted by changing the first angle θ 1  between the first inclined surface  141  and the first substrate  100 . 
     The opposite substrate  400  may include the second substrate  300 , and the first to third light blocking layers BM 1 , BM 2 , and BM 3  that are arranged on the second substrate  300  to block the light. When viewed in a plan view, the first light blocking layer BM 1  overlaps an area between the first red color pixel R 1  and the second red color pixel R 2  to block a portion of the lights generated from the first and second red color pixels R 1  and R 2 , the second light blocking layer BM 2  overlaps an area between the first green color pixel G 1  and the second green color pixel G 2  to block a portion of the lights generated from the first and second green color pixels G 1  and G 2 , and the third light blocking layer BM 3  overlaps an area between the first blue color pixel B 1  and the second blue color pixel B 2  to block a portion of the lights generated from the first and second blue color pixels B 1  and B 2 . 
     In other words, the first light blocking layer BM 1  may be arranged on the second substrate  300  corresponding to the first boundary area BA 1 . Thus, the first light blocking layer BM 1  prevents the light generated from the first red color pixel R 1  and the light generated from the second red color pixel R 2  from being mixed with each other and exiting outward. 
       FIG. 4  is a view showing a viewing range of the organic light emitting display in accordance with one or more embodiments.  FIG. 4  shows a viewing range of pixels arranged in the first row of  FIG. 1 . 
     Referring to  FIGS. 1 and 4 , the OLED  500  may generate a first red light  161  and a second red light  162  in the first main-pixel area M_PA 1 . More particularly, the first red color pixel R 1  and the second red color pixel R 2  arranged in the first main-pixel area M_PA 1  may generate the first red light  161  and the second red light  162 , respectively, the first green color pixel G 1  and the second green color pixel G 2  arranged in the second main-pixel area M_PA 2  may generate a first green light  163  and a second green light  164 , respectively, and the first blue color pixel B 1  and the second blue color pixel B 2  arranged in the third main-pixel area M_PA 3  may generate a first blue light  165  and a second blue light  166 , respectively. 
     As described above with reference to  FIGS. 2 and 3 , the two color pixels arranged in each of the first to third main-pixel areas M_PA 1 , M_PA 2 , and M_PA 3  generate lights that may be transmitted in different directions from each other. When assuming that the first red light  161  is transmitted approximately in a third direction D 3  and the second red light  162  is transmitted approximately in a fourth direction D 4 , the first green light  163  and the first blue light  165  are transmitted approximately in the third direction D 3 , and the second green light  164  and the second blue light  166  are transmitted approximately in the fourth direction D 4 . 
     When the lights generated from the OLED  500  proceed or are transmitted in two directions, the viewing range of the OLED  500  may be determined depending on the two directions only. For instance, when a first user USER 1  and a second user USER 2  perceive the lights generated from the OLED  500 , the first user USER 1  perceives the light in which the first red light  161 , the first green light  163 , and the first blue light  165  are mixed with each other, and the second user USER 2  perceives the light in which the second red light  162 , the second green light  164 , and the second blue light  166  are mixed with each other. That is, the first and second users USER 1  and USER 2  perceive different lights according to their positions relative to the OLED  500 . Thus, the first user USER 1  perceives an image displayed by color pixels including the first red color pixel R 1 , the first green color pixel G 1 , and the first blue color pixel B 1 , and the second user USER 2  perceives an image displayed by color pixels including the second red color pixel R 2 , the second green color pixel G 2 , and the second blue color pixel B 2 . 
     When the users perceive the different lights according to their positions, the OLED  500  may display the same image in two different main viewing angles from each other, or may display two different images in different main viewing angles from each other. 
       FIG. 5  is a circuit diagram showing the organic light emitting display in accordance with one or more embodiments. In  FIG. 5 , electrical connections among a plurality of first red color pixels R 1 , a plurality of second red color pixels R 2 , a plurality of first green color pixels G 1 , a plurality of second green color pixels G 2 , a plurality of first blue color pixels B 1 , and a plurality of second blue color pixels B 2 , which may be arranged in the display substrate  200  of  FIG. 1 , have been shown. 
     Referring to  FIG. 5 , in color pixels arranged in the first row, the OLED  500  may include first to sixth gate lines GL 1 , GL 2 , GL 3 , GL 4 , GL 5 , and GL 6 , first to sixth data lines DL 1 , DL 2 , DL 3 , DL 4 , DL 5 , and DL 6 , and first to sixth power voltage lines BL 1 , BL 2 , BL 3 , BL 4 , BL 5 , and BL 6 . 
     One of the first, second, third, fourth, fifth and sixth gate lines GL 1 , GL 2 , GL 3 , GL 4 , GL 5  and GL 6  and one of the first, second, third, fourth, fifth and sixth data lines DL 1 , DL 2 , DL 3 , DL 4 , DL 5  and DL 6  define a sub-pixel area with one of first to sixth power voltage lines BL 1 , BL 2 , BL 3 , BL 4 , BL 5 , and BL 6 . 
     For instance, the first gate line GL 1  and the first data line DL 1  may define the first sub-pixel area S_PA 1  (shown in  FIG. 1 ) with the first power voltage line BL 1 , and the second gate line GL 2  and the second data line DL 2  may define the second sub-pixel area S_PA 2  (shown in  FIG. 1 ) with the second power voltage line BL 2 . Also, the first sub-pixel area S_PA 1  may include the first switching transistor S_TR 1 , the first driving transistor TR 1 , the first positive electrode AE 1 , and the negative electrode CE, and the second sub-pixel area S_PA 2  may include the second switching transistor S_TR 2 , the second driving transistor TR 2 , the second positive electrode AE 2 , and the negative electrode CE. 
     The first switching transistor S_TR 1  may include a gate electrode  11  electrically connected to the first gate line GL 1 , a source electrode  12  electrically connected to the first data line DL 1 , and the drain electrode  13 . Also, the first driving transistor TR 1  may include the first gate electrode GE 1  electrically connected to the drain electrode  13 , the first source electrode SE 1  electrically connected to the first power voltage line BL 1 , and the first drain electrode DE 1 . 
     In the first switching transistor S_TR 1  and the first driving transistor TR 1 , the first switching transistor S_TR 1  may be turned on in response to a gate signal provided from the first gate line GL 1 . Thus, a data signal may be applied to the first gate electrode GE 1  from the first data line DL 1  through the source electrode  12  and the drain electrode  13  to turn on the first driving transistor TR 1 . When the first driving transistor TR 1  is turned on by the data signal, the power voltage may be applied to the first positive electrode AE 1  from the first power voltage line BL 1  through the first source electrode SE 1  and the first drain electrode DE 1 . 
     In the color pixels arranged in the first row, the first red color pixel R 1  may be electrically connected to the first switching transistor S_TR 1  and the first driving transistor TR 1 , the first green color pixel G 1  may be electrically connected to a third switching transistor S_TR 3  and a third driving transistor TR 3 , and the first blue color pixel B 1  may be electrically connected to a fifth switching transistor S_TR 5  and a fifth driving transistor TR 5 . The first, third, and fifth switching transistors S_TR 1 , S_TR 3 , and S_TR 5  may be electrically connected to the first gate line GL 1  and turned on upon receiving the gate signal provided from the first gate line GL 1 . Since switching operations of the first, third, and fifth driving transistors TR 1 , TR 3 , and TR 5  correspond to switching operations of the first, third, and fifth switching transistors S_TR 1 , S_TR 3 , and S_TR 5  in one-to-one correspondence, operations of the first red color pixel R 1 , the first green color pixel G 1 , and the first blue color pixel B 1  may be controlled by the gate signal transmitted through the first gate line GL 1 . 
     Also, in the color pixels arranged in the first row, the second red color pixel R 2  may be electrically connected to the second switching transistor S_TR 2  and the second driving transistor TR 2 , the second green color pixel G 2  may be electrically connected to a fourth switching transistor S_TR 4  and a fourth driving transistor TR 4 , and the second blue color pixel B 2  may be electrically connected to a sixth switching transistor S_TR 6  and a sixth driving transistor TR 6 . The second, fourth, and sixth switching transistors S_TR 2 , S_TR 4 , and S_TR 6  may be electrically connected to the second gate line GL 2  and turned on upon receiving the gate signal provided from the second gate line GL 2 . Since switching operations of the second, fourth, and sixth driving transistors TR 2 , TR 4 , and TR 6  correspond to switching operations of the second, fourth, and sixth switching transistors S_TR 2 , S_TR 4 , and S_TR 6  in one-to-one correspondence, operations of the second red color pixel R 2 , the second green color pixel G 2 , and the second blue color pixel B 2  may be controlled by the gate signal transmitted through the second gate line GL 2 . 
     Similar to the color pixels arranged in the first row, the first red color pixel R 1 , the first green color pixel G 1 , and the first blue color pixel B 1 , which are arranged in a second row, may be controlled by the gate signal transmitted through the third gate line GL 3 , and the second red color pixel R 2 , the second green color pixel G 2 , and the second blue color pixel B 2 , which are arranged in the second row, may be controlled by the gate signal transmitted through the fourth gate line GL 4 . In addition, the first red color pixel R 1 , the first green color pixel G 1 , and the first blue color pixel B 1 , which are arranged in a third row, may be controlled by the gate signal transmitted through the fifth gate line GL 5 , and the second red color pixel R 2 , the second green color pixel G 2 , and the second blue color pixel B 2 , which are arranged in the third row, may be controlled by the gate signal transmitted through the sixth gate line GL 6 . 
     In the OLED  500  having the above stated structure, the first red color pixels R 1  and the second red color pixels R 2  may be separately operated, the first green color pixels G 1  and the second green color pixels G 2  may be separately operated, and the first blue color pixels B 1  and the second blue color pixels B 2  may be separately operated. 
     Thus, when the OLED  500  displays a first image by operating the first red color pixels R 1 , the first green color pixels G 1 , and the first blue color pixels B 1  that generate the lights transmitted approximately in the third direction D 3  (shown in  FIG. 4 ), the OLED  500  may substantially simultaneously display a second image different from the first image by operating the second red color pixels R 2 , the second green color pixels G 2 , and the second blue color pixels B 2  that generate the lights transmitted approximately in the fourth direction D 4  (shown in  FIG. 4 ). 
     Also, since the first red color pixels R 1 , the first green color pixels G 1 , and the first blue color pixels B 1  may be separately operated from the second red color pixels R 2 , the second green color pixels G 2 , and the second blue color pixels B 2 , the OLED  500  may substantially simultaneously display the first image and the second image, or the OLED  500  may display either the first image or the second image. 
       FIGS. 6 to 8  are sectional views showing an a manufacturing method of the organic light emitting display of  FIG. 3  in accordance with one or more embodiments. 
     Referring to  FIGS. 6 to 8 , the first driving transistor TR 1  and the second driving transistor TR 2  may be formed on the first substrate  100  on which the blocking layer  110  is formed, and the protective layer  130  may be formed to cover the first and second driving transistors TR 1  and TR 2 . The protective layer  130  may be partially removed to expose the first and second drain electrodes DEI and DE 2 . 
     An insulating layer  145  may be formed on the protective layer  130 . The insulating layer  145  may include a photoresist material that may be cured by light or heat. After forming the insulating layer  145  on the protective layer  130 , the insulating layer  145  may be pressed using a mold  180 , and the pressed insulating layer  145  may be cured by heat or light to form the insulating layer pattern  140 . 
     The mold  180  may have a shape corresponding to the insulating layer pattern  140 . For example, the mold  180  may include a first press surface  181  and a second press surface  182  corresponding to the first and second inclined surfaces  141  and  142  of the insulating layer pattern  140 , respectively. The mold  180  may be formed by transferring a pattern formed on a metallic pattern mold corresponding to the insulating layer pattern  140  onto a surface of the mold  180 . 
     Referring again to  FIG. 3 , after forming the insulating layer pattern  140 , the first and second positive electrodes AE 1  and AE 2 , the first and second organic light emitting layers EL 1  and EL 2 , and the negative electrode CE may be formed to complete the display substrate  200 . After completing the display substrate  200 , the light blocking layers including the first light blocking layer BM 1  may be formed on the second substrate  300  to complete the opposite substrate  400 , and then the display substrate  200  and the opposite substrate  400  may be coupled with each other to complete the OLED  500 . 
       FIGS. 9 and 10  are sectional views showing a manufacturing method of the organic light emitting display of  FIG. 3  in accordance with one or more embodiments. 
     Referring to  FIGS. 7 and 9 , the insulating layer  145  including a positive photoresist material may be formed on the protective layer  130 . The insulating layer  145  may be exposed to a light using a slit mask  350  and developed to form a preliminary insulating layer pattern  146 . 
     The slit mask  350  may include a transmission region  351 , a semi-transmission region  352 , and a non-transmission region  353 . When exposing the insulating layer  145  to the light using the slit mask  350 , the non-transmission region  353  may partially overlap the first boundary area BA 1 , the transmission region  351  may overlap the first and second contact holes CH 1  and CH 2 , and the semi-transmission region  353  may partially overlap the first and second sub-pixel areas S_PA 1  and S_PA 2 . 
     When the insulating layer  145  is exposed to the light using the slit mask  350  and developed to form the preliminary insulating layer pattern  146 , the preliminary insulating layer pattern  146  may have a first thickness T 1  corresponding to the non-transmission region  353  and may have a second thickness T 2 , which may be thinner than the first thickness T 1 , corresponding to the semi-transmission region  353 . Also, the preliminary insulating layer pattern  146  may have an opening corresponding to the transmission region  351 . Thus, the preliminary insulating layer pattern  146  may have a step difference portion  147  corresponding to each of the first and second sub-pixel areas S_PA 1  and S_PA 2 . 
     Referring to  FIG. 10 , the preliminary insulating layer pattern  146  may be reflowed using a heat process to form the insulating layer pattern  140 . As the preliminary insulating layer pattern  146  is reflowed, the step difference portion  147  (shown in  FIG. 9 ) of the preliminary insulating layer pattern  146  may form the first and second inclined surfaces  141  and  142  having an inclination angle with respect to the first substrate  100 . 
     According to the above, the organic light emitting display may display a plurality of images using lights that are transmitted in different directions corresponding to the respective inclined surfaces. 
     Although the example embodiments of the present invention have been described, it is understood that the present invention should not be limited to these embodiments but various changes and modifications can be made by one ordinary skilled in the art within the spirit and scope of the present invention as hereinafter claimed.