Patent Publication Number: US-10777127-B2

Title: Organic electroluminescent display panel and display device

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     This application claims the priority of Chinese patent application No. 201710979025.4, filed on Oct. 19, 2017, the entirety of which is incorporated herein by reference. 
     FIELD OF THE DISCLOSURE 
     The present disclosure generally relates to the field of display technology and, more particularly, relates to an organic electroluminescent display panel and a display device. 
     BACKGROUND 
     As a new display technology, transparent displays can allow viewers to see the background scene behind the display screen. This newly emerging display effect expands the scope of display applications, and can be used in various display devices such as mobile phones, notebook computers, display windows, refrigerator doors, car displays, billboards, etc. 
     However, existing transparent display panels may lead to a visual effect of interlaced brightness during display. Especially, when the pixel density, e.g. pixels per inch (PPI), is low, the visual effect of interlaced brightness may be particularly obvious. The disclosed organic electroluminescent display panel and display device are directed to solve one or more problems set forth above and other problems in the art. 
     BRIEF SUMMARY OF THE DISCLOSURE 
     One aspect of the present disclosure provides an organic electroluminescent display panel. The display panel includes a plurality of pixel cells arranged into a matrix on a base substrate. Each pixel cell includes at least two subpixels arranged next to each other along a first direction. Each subpixel includes a light transmission region, an opaque emission region, and an emission region arranged along a second direction with the opaque emission region being disposed between the light transmission region and the emission region. The second direction and the first direction are perpendicular to each other. For the at least two subpixels in each pixel cell, the opaque emission regions are arranged in one straight line along the first direction, the light transmission regions are arranged in two straight lines along the first direction, and the emission regions are also arranged in the two straight lines along the first direction in which the light transmission regions are arranged. 
     Another aspect of the present disclosure provides a display device. The display device includes an organic electroluminescent display panel described in the present disclosure. 
     Other aspects of the present disclosure can be understood by those skilled in the art in light of the description, the claims, and the drawings of the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The following drawings are merely examples for illustrative purposes according to various disclosed embodiments and are not intended to limit the scope of the present disclosure. 
         FIG. 1  illustrates a schematic view of an existing transparent display panel; 
         FIG. 2  illustrates a schematic view of an exemplary organic electroluminescent display panel consistent with some embodiments of the present disclosure; 
         FIG. 3  illustrates a schematic view of an exemplary subpixel of an organic electroluminescent display panel consistent with some embodiments of the present disclosure; 
         FIG. 4  illustrates a schematic view of another exemplary subpixel of an organic electroluminescent display panel consistent with some embodiments of the present disclosure; 
         FIG. 5  illustrates a schematic view of another exemplary subpixel of an organic electroluminescent display panel consistent with some embodiments of the present disclosure; 
         FIG. 6  illustrates a schematic view of another exemplary subpixel of an organic electroluminescent display panel consistent with some embodiments of the present disclosure; 
         FIG. 7  illustrates a schematic view of another exemplary subpixel of an organic electroluminescent display panel consistent with some embodiments of the present disclosure; 
         FIG. 8  illustrates a schematic view of another exemplary subpixel of an organic electroluminescent display panel consistent with some embodiments of the present disclosure; 
         FIG. 9  illustrates a schematic view of another exemplary subpixel of an organic electroluminescent display panel consistent with some embodiments of the present disclosure; 
         FIG. 10  illustrates a schematic view of another exemplary organic electroluminescent display panel consistent with some embodiments of the present disclosure; 
         FIG. 11  illustrates a schematic view of another exemplary organic electroluminescent display panel consistent with some embodiments of the present disclosure; 
         FIG. 12  illustrates a schematic view of another exemplary organic electroluminescent display panel consistent with some embodiments of the present disclosure; and 
         FIG. 13  illustrates a schematic view of an exemplary display device consistent with some embodiments of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to exemplary embodiments of the invention, which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. 
       FIG. 1  illustrates a schematic view of a conventional transparent display panel. As shown in  FIG. 1 , the conventional transparent display panel usually includes a plurality of pixel cells  10 . Each pixel cell  10  includes an opaque region for disposing a display component  12 . The display component  12  is driven to emit light such that the transparent display function is achieved. Each pixel cell  10  also includes a light transmission region  11 . The light transmission region  11  allows light to be transmitted through such that the scene behind the display panel can be viewed. In order to meet the requirements for arranging wires to connect the plurality of display components  12 , the opaque regions corresponding to the display components  12  need to be arranged in a plurality of straight lines, i.e. a plurality of rows. Therefore, the light transmission regions  11  and the opaque regions may together form an interlaced pattern, which may cause an interlacing display problem during display. 
     In order to eliminate the interlacing display problem, the light transmission regions  11  and the opaque regions in a transparent display panel can be arranged alternately along both the row direction and the column direction. Accordingly, the wires connecting to the display components  12  need to be changed from the straight lines, as shown in  FIG. 1 , to polylines in order to avoid the wires crossing the light transmission regions  11 . Therefore, the wires connecting to the plurality of display components  12  may need to be longer. In the meantime, arranging the wires to connect the plurality of display components  12  may become more difficult. Moreover, increasing the length of the wires is equivalent to increasing the wiring area, and the increase in the wiring area may lead to an increase in the overall reflectance of the transparent display panel. As such, the transmittance of the transparent display panel may be degraded. 
     The present disclosure provides an organic electroluminescent display panel to solve the interlacing display problem.  FIG. 2  illustrates a schematic view of an exemplary organic electroluminescent display panel consistent with some embodiments of the present disclosure. 
     Referring to  FIG. 2 , the organic electroluminescent display panel may include a plurality of pixel cells  200  arranged into a matrix on a base substrate  100 . Each pixel cell  200  may include at least two neighboring subpixels  210  along a first direction A. Along a second direction B, each subpixel  210  may include a light transmission region a, an opaque emission region b, and an emission region c. The second direction B and the first direction A may be perpendicular to each other. 
     In each subpixel  210 , the opaque emission region b may be formed between the light transmission region a and the emission region c. 
     In each pixel cell  200 , the opaque emission regions b of different subpixels  210  may be arranged in a single straight line along the first direction A. In addition, in each pixel cell  200 , the light transmission regions a of different subpixels  210  may be arranged in two straight lines along the first direction A, and the emission regions c of different subpixels  210  may also be arranged in the two straight lines that the light transmission regions a are arranged in. That is, the light transmission regions a and the emission regions c of the subpixels  210  in each pixel cell  200  may be arranged in different lines, i.e., two straight lines along the first direction A, and each of the two straight lines may include at least one light transmission region a and at least one emission region c. 
     For example, in each pixel cell  200  of an organic electroluminescent display panel consistent with the embodiment described above, the opaque emission regions b are arranged in a straight line along the first direction A. Moreover, on the two sides of the opaque emission regions b, the light transmission regions a and the emission regions c may be arranged in two straight lines with each of the straight line extending along the first direction A. That is, on each side of the straight line formed by the opaque emission regions b in the pixel cell  200 , at least one light transmission region a and at least one emission region c may together form a straight line extending along the first direction A. The total number of the light transmission regions a and the emission regions c in the straight line may be equal to the number of the subpixels  210  in the pixel cell  200 . 
     Therefore, the possibility of having two or more interconnected light transmission regions a may be limited, and thus the area corresponding to two or more interconnected light transmission regions a may be reduced. As such, the visual effect of interlaced brightness may be eliminated, and the display result may be improved. Moreover, because the wires used to control light emission may be disposed in the opaque emission regions b, which are arranged in a straight line along the first direction A, the length of the wires running through the opaque emission regions b may be reduced and the challenge in disposing the wires in the opaque emission regions b may also be reduced. 
     In one embodiment, the first direction A may be the row direction of the matrix formed by the plurality of pixel cells  200 , and accordingly, the second direction B may be the column direction of the matrix formed by the plurality of pixel cells  200 . Alternatively, the first direction A may be the column direction of the matrix formed by the plurality of pixel cells  200 , and accordingly, the second direction B may be the row direction of the matrix formed by the plurality of pixel cells  200 . 
     In one embodiment, each pixel cell  200  may include a plurality of subpixels  210 , and the plurality of subpixels  210  in each pixel cell  200  may have different colors. For illustrative purposes, in one embodiment, each pixel cell  200  is described to include three subpixels  200  and the colors of the three subpixels  200  are described to be red (R), green (G), and blue (B), respectively. In other embodiments, the number of subpixels in each pixel of the organic electroluminescent display panel may be different from three, and/or the colors of the subpixels may not be limited to R, G, and B. Any appropriate number of subpixels and/or colors may be used. 
     Further,  FIGS. 3-9  illustrate schematic views of exemplary subpixels of organic electroluminescent display panels consistent with various embodiments of the present disclosure. For illustrative purposes, only one subpixel  210  (referring to  FIG. 2 ) is shown in each figure although the display panel may include a plurality of subpixels  210 . 
     Referring to  FIGS. 3-9 , each subpixel  210  (referring to  FIG. 2 ) may include a light-emitting drive circuit  211 , a reflective electrode  212 , and an organic light-emitting structure  213  stacked in sequence on the base substrate  100 . Moreover, the organic light-emitting structure  213  may be formed at least in the emission region c and the opaque emission region b, the light-emitting drive circuit  211  may be formed only in the opaque emission region b, and the reflective electrode  212  may be formed at least in the opaque emission region b. 
     Specifically, as shown in  FIG. 3 , the reflective electrode  212  of the subpixel is formed in the opaque emission region b, and the organic light-emitting structure  213  of the subpixel is formed in the emission region c and the opaque emission region b. 
     As shown in  FIG. 4 , both the reflective electrode  212  and the organic light-emitting structure  213  of the subpixel are formed in the emission region c and the opaque emission region b. 
     As shown in  FIG. 5 , the reflective electrode  212  of the subpixel is formed in the opaque emission region b, and the organic light-emitting structure  213  of the subpixel is formed in the emission region c, the opaque emission region b, and the light transmission region a. 
     As shown in  FIG. 6 , the reflective electrode  212  of the subpixel is formed in both the emission region c and the opaque emission region b, and the organic light-emitting structure  213  of the subpixel is formed in the emission region c, the opaque emission region b, and the light transmission region a. 
     As shown in  FIG. 7 , the reflective electrode  212  of the subpixel is formed in the opaque emission region b, and the organic light-emitting structure  213  of the subpixel is formed in the emission region c, the opaque emission region b, and the light transmission region a. In addition, a first color resist  2134  is formed in the emission region c, the opaque emission region b, and the light transmission region a, and covers the surface of the organic light structure  213  away from the substrate  100 . 
     As shown in  FIG. 8 , the reflective electrode  212  of the subpixel is formed in the opaque emission region b, and the organic light-emitting structure  213  of the subpixel is formed in the emission region c, the opaque emission region b, and the light transmission region a. In addition, a first color resist  2134  is formed in the emission region c and the opaque emission region b, and covers the surface of the organic light structure  213  away from the substrate  100 . 
     As shown in  FIG. 9 , the reflective electrode  212  of the subpixel is formed in the opaque emission region b, and the organic light-emitting structure  213  of the subpixel may be formed in the emission region c, the opaque emission region b, and the light transmission region a. In addition, a first color resist  2134  is formed in the emission region c, the opaque emission region b, and the light transmission region a, and covers the surface of the organic light structure  213  away from the substrate  100 . Moreover, a second color resist  2135  is formed in the emission region c, and between the organic light structure  213  and the substrate  100 . 
     According to the disclosed organic electroluminescent display panels, the opaque emission regions b of the subpixels  210  of the plurality of pixel cells  200  (referring to  FIG. 2 ) are arranged in a plurality of straight lines along the first direction A, and the light-emitting drive circuit  211  in each subpixel is formed only in the opaque emission region b. Therefore, the wires connecting to the plurality of light-emitting drive circuit  211  may extend along the first direction A. As such, the length of the wires may be reduced and the challenge in arranging the wires may also be reduced. 
     In some embodiments, referring to  FIGS. 3, 5, and 7-9 , the reflective electrode  212  may be formed only in the opaque emission region b. As such, the portion of the organic light-emitting structure  213  in the opaque emission region b may form a top emission structure, and the portion of the organic light-emitting structure  213  in the emission region c may form a double-sided emission structure. In the display mode, the surface of the base substrate  100  facing the organic light-emitting structure  213  may be the display surface, and the emission region c and the opaque emission region b may together form a light-emitting display area on the display surface. Therefore, the presence of the emission region c may increase the display brightness. In the non-display mode, the scene behind the display panel may be viewable due to light transmission through the emission region c and the light transmission region a. Therefore, the presence of the emission region c may improve the light-transmitting area. 
     In some other embodiments, referring to  FIGS. 4 and 6 , the reflective electrode  212  may be formed in both the opaque emission region b and the emission region c. Accordingly, the organic light-emitting structure  213  in the opaque emission region b and the emission region c may form a top emission structure. 
     According to the disclosed organic electroluminescent display panels, the organic light-emitting structure  213  formed in the emission region c and the opaque emission region b may be physically continuous to ensure that the light-emitting drive circuit  211  can control the organic light-emitting structure  213  to simultaneously emit light in both the emission region c and the opaque emission region b. 
     Further, in some embodiments, referring to  FIGS. 3 and 4 , the organic light-emitting structure  213  may be formed only in the emission region c and the opaque emission region b. Alternatively, in some other embodiments, referring to  FIGS. 5-9 , the organic light-emitting structure  213  may be formed in the light transmission region a, the emission region c, and the opaque emission region b. In the later scenario, in order to ensure that the portion of the organic light-emitting structure  213  in the light transmission region a does not emit light and thus affect the light transmission performance, the organic light-emitting structure  213  needs to be at least partially cut off at the boundary between the light transmission region a and the opaque emission region b such that the signal of the light-emitting drive circuit  211  may not be transmitted to the portion of the organic light-emitting structure  213  formed in the light transmission region a. 
     According to the disclosed organic electroluminescent display panels, the light-emitting drive circuit  211  is usually formed by a plurality of thin-film transistors. Referring to  FIGS. 3-9 , for illustrative purposes, only one transistor is shown in each figure. In other embodiments, the light-emitting drive circuit may have any other appropriate structure. 
     Further, referring to  FIGS. 3-6 , in some embodiments, the organic light-emitting structure  213  may usually include a first transparent electrode  2131 , an electroluminescent material layer  2132 , and a second transparent electrode  2133  disposed in sequence on the base substrate  100 . 
     Specifically, the first transparent electrode  2131  may be usually connected to the light-emitting drive circuit  211 , and the second transparent electrode  2133  may be usually set to a fixed voltage potential. In order to ensure the light transmission performance of the emission region c, the film layers constituting the organic light-emitting structure  213  may all be transparent. In addition, the organic light-emitting structure  213  may also include one or more functional film layers, such as a hole transport layer, etc. 
     According to the disclosed organic electroluminescent display panels, the electroluminescent material layers  2132  in the subpixels  210  of each pixel cell  200  may emit light in different colors. That is, the electroluminescent material layers  2132  in the subpixels  210  of each pixel cell  200  may be made of different materials. For example, in each pixel cell  200 , the colors of the light emitted by the electroluminescent material layers  2132  of different subpixels  210  may usually include red, blue, green, and other appropriate colors. 
     In some embodiments, each pixel cell  200  may include at least one subpixel  210  emitting white light. That is, in each pixel cell  200 , the electroluminescent material layer  2132  of at least one subpixel may emit white light. The white-light-emitting subpixels  210  may be able to improve the display brightness of the pixel cell  200 . 
     In some embodiments, the electroluminescent material layer  2132  in each subpixel  210  of the plurality of pixel cells  200  may be able to emit white light. In such a case, as shown in  FIGS. 7-8 , in order to allow different subpixels  210  in a same pixel cell  200  to emit light in different colors, the organic light-emitting structure  213  may also include a first color resist  2134  formed on the second transparent electrode  2133  in opposite to the electroluminescent material layer  2132 . In each pixel cell  200 , the first color resists  2134  of different subpixels  210  may have different colors. 
     For example, because the first color resist  2134  is usually made of a transparent material, as shown in  FIG. 7 , the first color resist  2134  may cover the entire area of the subpixel  210 . That is, the first color resist  2134  may be formed in the light transmission region a, the opaque emission region b, and the emission region c. Alternatively, referring to  FIG. 8 , the first color resist  2134  may be formed only in the opaque emission region b and the emission region c. 
     In some embodiments, the reflective electrode  212  may be formed only in the opaque emission region b. Accordingly, as shown in  FIG. 9 , the organic light-emitting structure  213  may also include a second color resist  2135  formed on the first transparent electrode  2131  in opposite to the electroluminescent material layer  2132 . The first color resist  2134  and the second color resist  2135  in a same subpixel  210  may have a same color. 
     In one embodiment, the reflective electrode  212  is formed only in the opaque emission region b, and no second color resist  2135  is formed on the surface of the first transparent electrode  2131 . During display, while the display content may be viewable on the side close to the second transparent electrode  2133 , light may be emitted to the side close to the first transparent electrode  2131 . That is, when the subpixel  210  is driven to display on the side of the display panel that faces to the second transparent electrode  2133 , light may be emitted to the other side of the display panel that faces to the first transparent electrode  2131 . 
     In another embodiment, the reflective electrode  212  is formed only in the opaque emission region b, and a second color resist  2135  is disposed on the first transparent electrode  2131  in opposite to the electroluminescent material layer  2132 . During display, while the display content may be viewable on the side closed to the second transparent electrode  2133 , the display content may also be viewable on the side close to the first transparent electrode  2131 . That is, when the subpixel  210  is driven to display on the side of the display panel that faces to the second transparent electrode  2133 , because of the presence of the second color resist  2135  on the first transparent electrode  2131 , the display may also be achieved on the side of the display panel that faces to the first transparent electrode  2131 . 
     In some embodiments, referring to  FIGS. 3-9 , in each subpixel  210 , a pixel restriction layer  214  may be disposed on the light-emitting drive circuit  211 . The pattern of the pixel restriction layer  214  may surround the emission region c and the opaque emission region b. 
     In some embodiments, referring to  FIGS. 5-9 , the organic light-emitting structure  213  may also be formed in the light transmission region a. In addition, the first transparent electrode  2131  and the electroluminescent material layer  2132  of the organic light-emitting structure  213  may be disconnected at the pixel restriction layer  214 , and the second transparent electrode  2133  may be formed as a single piece over the entire area of the base substrate  100 , including the light transmission region a, the emission region c, and the opaque emission region b. 
     For example, the pattern of the pixel restriction layer  214  may surround the emission region c and the opaque emission region b. That is, the light transmission region a may be isolated from the opaque emission region b by the pixel restriction layer  214 . Therefore, the first transparent electrode  2131  and the electroluminescent material layer  2132  may be disconnected at the pixel restriction layer  214 . That is, the presence of the pixel restriction layer  214  may ensure the disconnection between the portion of the first transparent electrode  2131  and the electroluminescent material layer  2132  formed in the light transmission region a and the portion of the first transparent electrode  2131  and the electroluminescent material layer  2132  formed in the opaque emission region b. As such, during the process to fabricate the organic light-emitting structure  213 , each of the first transparent electrode  2131 , the electroluminescent material layer  2132 , and the second transparent electrode  2133  may be formed by coating the entire surface without introducing any patterning process. 
       FIG. 10  illustrates a schematic view of another exemplary organic electroluminescent display panel consistent with some embodiments of the present disclosure. Referring to  FIG. 2  and  FIG. 10 , in some embodiments, the opaque emission regions b in different subpixels  210  may have a same area ratio with respect to the corresponding subpixels  210 . 
     In some embodiments, referring to  FIG. 10 , in each subpixel  210 , the area occupied by the light transmission region a may be the same as the total area occupied by the opaque emission region b and the emission region c. 
     Further, having the area occupied by the light transmission region a equal to the total area occupied by the opaque emission region b and the emission region c may ensure the light-transmitting area and the light-emitting area each occupying 50% of the area of the subpixel  210 . In some other embodiments, in order to control the luminous brightness, the ratio of the light transmission region a to the emission region c may be adjusted according to the actual needs. 
     Referring to  FIG. 2  and  FIG. 10 , in some embodiments, the plurality of light transmission regions a and the plurality of emission regions c may be arranged alternately in a plurality of straight lines along the first direction A. 
     Specifically, by arranging the light transmission regions a and the emission regions c alternately, the light transmission regions a and the light emission regions may be distributed more uniformly such that the uniformity of the colors may be improved, the visual effect of interlaced brightness may be eliminated, and the display result may also be improved. 
       FIG. 11  illustrates a schematic view of another exemplary organic electroluminescent display panel consistent with some embodiments of the present disclosure.  FIG. 12  illustrates a schematic view of another exemplary organic electroluminescent display panel consistent with some embodiments of the present disclosure. Referring to  FIG. 11  and  FIG. 12 , in each pixel cell  200 , the area occupied by the emission region c in a subpixel  210  with the lowest light emission efficiency may be larger than the area occupied by each emission region c in other subpixels  210 . 
     Specifically, in each pixel cell  200 , the light emission efficiency may be different for different subpixels  210 . In order to eliminate the difference in the brightness of the colors, because the areas of the opaque emission regions b in different subpixels  210  are substantially the same, the area of the emission region c in each subpixel  210  with the lowest light emission efficiency may be increased to improve the brightness of the light. 
     For example, referring to  FIG. 11  and  FIG. 12 , in the subpixels  210  with the lowest light emission efficiency, the area of the emission region c may be equal to the total area of the opaque emission region b and the light transmission region a. In other subpixels  210 , the area of the light transmission region a may be equal to the total area of the opaque emission region b and the emission region c. As such, in addition to eliminating the difference in the brightness of the colors, the arrangement of subpixels  210  may also ensure that the plurality of subpixels  210  are aligned, which is conducive to arranging the plurality of pixel cells  200 . 
     Referring to  FIG. 12 , in some embodiments, the colors of the light emitted by any two neighboring subpixels  210  in a straight light along the second direction B may be different. 
     Specifically, by arranging the subpixels  210  with different colors alternately along the second direction B, the uniformity of the colors may be improved, which may be conducive to eliminating the impact of the colors difference between lines. 
     In some embodiments, referring to  FIG. 12 , in a straight line along the second direction B, it is possible to have the light transmission regions a of two neighboring subpixels  210  next to each other. 
     Specifically, in a straight line either along the second direction B or along the first direction A, the layout of the pixel cells  200  may have the light transmission regions a of two neighboring subpixels  210  next to each other. As such, the distribution regularity of the light transmission regions a may be further reduced, and thus the influence of the light transmission regions a on the difference in the brightness may be minimized. 
     Further, the subpixels  210  with the lowest light emission efficiency may be arranged uniformly. As such, the uniformity of the colors may be improved, which may be conducive to eliminating the impact of the color difference between lines. 
     Referring to  FIG. 12 , in some embodiments, the subpixels  210  with the lowest light emission efficiency are usually blue subpixels B. Therefore, as shown in  FIG. 12 , the area of each emission region c in the blue subpixels B may be formed larger than the area of any emission region c in subpixels  210  with other colors. In  FIG. 12 , regions with a same filled pattern represent a same type of region. For example, the plurality of emission regions c in different subpixels  210  may all be filled by a double-slash pattern, and the plurality of opaque emission regions b may all be filled by a single-slash pattern. As shown in  FIG. 12 , the area of each emission region c in the blue subpixels B may be larger than the area of the emission region c in either the red subpixels R or the green subpixels G. Accordingly, in the case that the areas of the opaque emission regions b in different subpixels  210  are the same, the area of each light transmission region a in the blue subpixels B may be smaller than the area of the light transmission region a in the red subpixels R or the green subpixels G. 
     Further, the present disclosure also provides a display device.  FIG. 13  illustrates a schematic view of an exemplary display device consistent with some embodiments of the present disclosure. Referring to  FIG. 13 , the display device may include an organic electroluminescent display panel according to the present disclosure. For example, the display panel may be a cellphone, a tablet, a television, a monitor, a laptop computer, a digital camera, a navigation device, or any other product or component with a display function. Other indispensable components of the display device should be understood by those of ordinary skill in the art, and will not be described in detail herein again. In addition, the embodiments described in the present disclosure are merely examples of the implementation of the present invention, and thus should not be construed as limiting the scope of the present disclosure. Moreover, the implementation of the display device may be referred to the above embodiments of the disclosed organic electroluminescent display panels. 
     According to the disclosed organic electroluminescent display panels and display devices, each pixel cell includes at least two neighboring subpixels along a first direction of the arrangement, and each subpixel includes a light transmission region, an opaque emission region, and an emission region arranged along a second direction. Further, in each subpixel, the opaque emission region is disposed between the light emission region and the emission region. Moreover, in each pixel cell, a straight line extending along the first direction on each side of the opaque emission regions may include both the light transmission region and the emission region. Therefore, the area corresponding to two or more interconnected light transmission regions may be reduced. As such, the visual effect of interlaced brightness may be eliminated, and the display result may be improved. In addition, because the opaque emission regions of the subpixels are arranged in a straight line along the first direction, the wires used to control light emission may be disposed in the opaque emission regions. As such, the length of the wires running through the opaque emission regions may be reduced and the challenge in disposing the wires in the opaque emission regions may also be reduced. 
     The above detailed descriptions only illustrate certain exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art can understand the specification as whole and technical features in the various embodiments can be combined into other embodiments understandable to those persons of ordinary skill in the art. Any equivalent or modification thereof, without departing from the spirit and principle of the present invention, falls within the true scope of the present invention.