Patent Publication Number: US-2023157138-A1

Title: Display panel and display device

Description:
FIELD OF INVENTION 
     The present disclosure relates to the field of display technologies, and more particularly, to a display panel and a display device. 
     BACKGROUND OF INVENTION 
     With development of full screen display technologies, camera-under-panel (CUP) technology has been continuously iterating from an initial concept to current mass production. A key factor of the camera-under-panel technology is to improve transmittances to visible light in camera areas of display panels. However, subjected to current panel designs and film structures, the transmittances in the camera areas of the display panels are not high. Therefore, it is necessary to introduce new designs, materials, and processes for improving the transmittances in the camera areas of the display panels, thereby improving an image-taking effect of under-screen cameras. 
     Technical problem: an embodiment of the present disclosure provides a display panel and a display device, which can improve a transmittance in a camera area of the display panel, thereby improving the image-taking effect of the under-screen cameras. 
     SUMMARY OF INVENTION 
     An embodiment of the present disclosure provides a display panel, which includes a first display area and a second display area, wherein, a light transmittance of the first display area is greater than a light transmittance of the second display area; the display panel includes a light-emitting functional layer and a color filter layer, and the light-emitting functional layer includes a plurality of pixel light-emitting units disposed at intervals; and 
     in the first display area, the color filter layer includes a first light-filtering layer and a first transparent planarization layer, the first light-filtering layer includes a plurality of first light-filtering units corresponding to the pixel light-emitting units by one to one, and the first transparent planarization layer fills gaps among the first light-filtering units adjacent to each other. 
     Optionally, in some embodiments of the present disclosure, in the second display area, the color filter layer includes a black matrix layer, a second light-filtering layer, and a second transparent planarization layer, the black matrix layer is patterned to form black matrix openings, the second light-filtering layer includes a plurality of second light-filtering units disposed in the black matrix openings and corresponding to the pixel light-emitting units by one to one, and the second transparent planarization layer covers the second light-filtering layer and the black matrix layer. 
     Optionally, in some embodiments of the present disclosure, an orthographic projection of the first light-filtering units on the light-emitting functional layer covers the pixel light-emitting units corresponding to the first light-filtering units, and an orthographic projection of the second light-filtering units on the light-emitting functional layer covers the pixel light-emitting units corresponding to the second light-filtering units. 
     Optionally, in some embodiments of the present disclosure, for the pixel light-emitting units having a same color, a size of the pixel light-emitting units in the first display area is less than a size of the pixel light-emitting units in the second display area, and for the first light-filtering units and the second light-filtering units corresponding to the pixel light-emitting units having the same color, a size of the first light-filtering units is less than a size of the second light-filtering units. 
     Optionally, in some embodiments of the present disclosure, the light-emitting functional layer includes a first electrode layer, a light-emitting layer, and a second electrode layer, the light-emitting layer is disposed between the first electrode layer and the second electrode layer, the first electrode layer includes a plurality of first electrodes disposed at intervals and independent of each other, and the first electrodes correspond to the pixel light-emitting units; and 
     in the first display area, openings of the second electrode layer are defined on the second electrode layer corresponding to the gaps among the first light-filtering units. 
     Optionally, in some embodiments of the present disclosure, a projection of the openings of the second electrode layer on the color filter layer is within a plane range of the gaps among the first light-filtering units. 
     Optionally, in some embodiments of the present disclosure, in the second display area, the second electrode layer is disposed as a whole layer. 
     Optionally, in some embodiments of the present disclosure, the display panel further includes a touch control layer disposed between the color filter layer and the light-emitting functional layer, and the touch control layer includes touch control electrodes disposed in an area outside the first display area. 
     Optionally, in some embodiments of the present disclosure, in the second display area, the touch control electrodes are disposed at positions corresponding to the black matrix layer. 
     Optionally, in some embodiments of the present disclosure, the display panel further includes a coverplate disposed on one side of the color filter layer away from the light-emitting functional layer, and in the first display area, the coverplate includes a transparent substrate and an anti-reflection film disposed on one side of the transparent substrate away from the color filter layer. 
     Optionally, in some embodiments of the present disclosure, the anti-reflection film includes a transparent film layer having a single-layered structure or a multi-layered transparent film layer having different refractive indexes. 
     Optionally, in some embodiments of the present disclosure, the anti-reflection film includes a single-layered magnesium fluoride thin film, a double-layered magnesium fluoride/zirconia thin film, or a multi-layered silicon oxide/titanium oxide/silicon oxide/titanium oxide thin film. 
     Optionally, in some embodiments of the present disclosure, the display panel further includes an array substrate, the array substrate includes a substrate, and in the first display area, the substrate is a transparent substrate. 
     Optionally, in some embodiments of the present disclosure, the transparent substrate is highly transparent glass or a transparent polyimide thin film. 
     Correspondingly, an embodiment of the present disclosure further provides a display device, which includes a display panel, wherein, the display panel includes a first display area and a second display area, and a light transmittance of the first display area is greater than a light transmittance of the second display area; the display panel includes a light-emitting functional layer and a color filter layer, and the light-emitting functional layer includes a plurality of pixel light-emitting units disposed at intervals; and 
     in the first display area, the color filter layer includes a first light-filtering layer and a first transparent planarization layer, the first light-filtering layer includes a plurality of first light-filtering units corresponding to the pixel light-emitting units by one to one, and the first transparent planarization layer fills gaps among the first light-filtering units adjacent to each other. 
     Optionally, in some embodiments of the present disclosure, in the second display area, the color filter layer includes a black matrix layer, a second light-filtering layer, and a second transparent planarization layer, the black matrix layer is patterned to form black matrix openings, the second light-filtering layer includes a plurality of second light-filtering units disposed in the black matrix openings and corresponding to the pixel light-emitting units by one to one, and the second transparent planarization layer covers the second light-filtering layer and the black matrix layer. 
     Optionally, in some embodiments of the present disclosure, the light-emitting functional layer includes a first electrode layer, a light-emitting layer, and a second electrode layer, the light-emitting layer is disposed between the first electrode layer and the second electrode layer, the first electrode layer includes a plurality of first electrodes disposed at intervals and independent of each other, and the first electrodes correspond to the pixel light-emitting units; and 
     in the first display area, openings of the second electrode layer are defined on the second electrode layer corresponding to the gaps among the first light-filtering units. 
     Optionally, in some embodiments of the present disclosure, the display panel further includes a touch control layer disposed between the color filter layer and the light-emitting functional layer, and the touch control layer includes touch control electrodes disposed in an area outside the first display area. 
     Optionally, in some embodiments of the present disclosure, the display panel further includes a coverplate disposed on one side of the color filter layer away from the light-emitting functional layer, and in the first display area, the coverplate includes a transparent substrate and an anti-reflection film disposed on one side of the transparent substrate away from the color filter layer. 
     Optionally, in some embodiments of the present disclosure, the display panel further includes an array substrate, the array substrate includes a substrate, and in the first display area, the substrate is a transparent substrate. 
     Beneficial effect: the embodiments of the present disclosure provide the display panel and the display device. The display panel includes the first display area and the second display area, wherein, the light transmittance of the first display area is greater than the light transmittance of the second display area. The display panel includes the light-emitting functional layer and the color filter layer, and the light-emitting functional layer includes the plurality of pixel light-emitting units disposed at intervals. In the first display area, the color filter layer includes the first light-filtering layer and the first transparent planarization layer, the first light-filtering layer includes the plurality of first light-filtering units corresponding to the pixel light-emitting units by one to one, and the first transparent planarization layer fills the gaps among the first light-filtering units adjacent to each other. The present disclosure disposes the color filter layer on the light-emitting functional layer of the display panel to replace polarizers, and in the first display area, the gaps among the first light-filtering units in the color filter layer are filled only by the transparent planarization layer. Therefore, the light transmittance of the first display area of the display panel is improved, thereby improving an image-taking effect of cameras. 
    
    
     
       DESCRIPTION OF DRAWINGS 
       The following detailed description of specific embodiments of the present disclosure will make the technical solutions and other beneficial effects of the present disclosure obvious with reference to the accompanying drawings. 
         FIG.  1    is a schematic planar structural diagram of a display panel according to an embodiment of the present disclosure. 
         FIG.  2    is a schematic cross-sectional structural diagram of the display panel according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     The embodiments of the present disclosure provide a display panel and a display device to improve a light transmittance in a camera area of the display panel, thereby improving an image-taking effect of under-screen cameras. They will be described in detail in the following. It should be noted that an order of description in the following embodiments is not meant to limit a preferred order of the embodiments. 
     In an embodiment, referring to  FIGS.  1  and  2   ,  FIG.  1    shows a schematic planar structural diagram of the display panel provided by the present disclosure, and  FIG.  2    shows a schematic cross-sectional structural diagram of the display panel provided by the present disclosure. As shown in the figures, the display panel  10  provided by the embodiment of the present disclosure includes a first display area  11  and a second display area  12 , and a light transmittance of the first display area  11  is greater than a light transmittance of the second display area  12 . In the first display area  11 , the display panel includes first pixel areas AA and light-transmitting areas TA disposed between the first pixel areas AA, and in the second display area  12 , the display panel includes second pixel areas BA and light-shielding areas NA disposed between the second pixel areas BA. The display panel includes a light-emitting functional layer  200  and a color filter layer  500 . The light-emitting functional layer  200  includes a plurality of pixel light-emitting units disposed at intervals, and the pixel light-emitting units are positioned in corresponding first pixel areas AA and second pixel areas BA by one to one. The color filter layer  500  is disposed on a light-emitting side of the light-emitting functional layer  200  and includes a black matrix layer  510 , a light-filtering layer  520 , and a transparent planarization layer  530 . 
     The black matrix layer  510  is disposed only in the second display area  12 , that is, no black matrix layer is disposed in the first display area  11 . In the second display area  12 , the black matrix layer  510  is patterned to form black matrix openings, the black matrix openings correspond to the pixel light-emitting units by one to one, and the black matrix layer  510  excluding the black matrix openings covers the light-shielding areas NA. The black matrix layer  510  is mainly configured to absorb light to reduce reflections of metals under the black matrix layer  510  to external light, thereby reducing a low blue light effect of the display panel. A material of the black matrix layer  510  includes at least one of carbon black, titanium oxide, inks, or photoresists with dark colors. 
     The light-filtering layer  520  is disposed on the black matrix layer  510  and includes light-filtering units  521 , light-filtering units  522 , and light-filtering units  523  disposed at intervals, and the light-filtering units  521 , the light-filtering units  522 , and the light-filtering units  523  may be red light-filtering units, green light-filtering units, and blue light-filtering units, respectively. In the second display area  12 , the light-filtering units  521 , the light-filtering units  522 , and the light-filtering units  523  are disposed in different black matrix openings, respectively. The red light-filtering units correspond to red pixel light-emitting units by one to one, the green light-filtering units correspond to green pixel light-emitting units by one to one, and the blue light-filtering units correspond to blue pixel light-emitting units by one to one. Similarly, in the first display area  11 , the light-filtering units  521 , the light-filtering units  522 , and the light-filtering units  523  are disposed independently at intervals, respectively. The red light-filtering units correspond to the red pixel light-emitting units by one to one, the green light-filtering units correspond to the green pixel light-emitting units by one to one, and the blue light-filtering units correspond to the blue pixel light-emitting units by one to one. In an embodiment, for the pixel light-emitting units having a same color, a size of the pixel light-emitting units in the first display area  11  is less than a size of the pixel light-emitting units in the second display area  12 , and for the light-filtering units corresponding to the pixel light-emitting units having the same color, a size of the light-filtering units in the first display area  11  is less than a size of the light-filtering units in the second display area  12 . An orthographic projection of the light-filtering units on the light-emitting functional layer covers corresponding pixel light-emitting units, and the size of the light-filtering units may be same as or larger than the corresponding pixel light-emitting units. The light-filtering units may be disposed only in corresponding pixel areas or may cover and extend out of the corresponding pixel areas. Each of the light-filtering units in the light-filtering layer  520  may include materials corresponding to colors thereof, such as pigments, photo curable resins, alkaline soluble resins, photo initiators, to realize light filtering functions. 
     The transparent planarization layer  530  is disposed on the light-filtering layer  520 . In the second display area  12 , the transparent planarization layer  530  covers the light-filtering layer  520  and the black matrix layer  510 , and in the first display area  11 , the transparent planarization layer  530  covers the light-filtering layer  520  and fills gaps among the light-filtering units  521 , the light-filtering units  522 , and the light-filtering units  523 . A material of the transparent planarization layer  530  mainly includes acrylic organic materials and siloxane organic materials, and specifically includes, but is not limited to, acrylates, polyimide (PI), or benzocyclobutene (BCB). 
     The embodiment of the present disclosure reduces a thickness of the display panel by disposing the color filter layer on the light-emitting functional layer of the display panel to replace polarizers, and prevents the black matrix layer from shielding light that is transmitted through the light-transmitting areas by adopting a transparent filling layer to fill the gaps among the light-filtering units, thereby improving the light transmittance in the first display area of the display panel and improving the image-taking effect of the under-screen cameras. 
     Specifically, referring to  FIG.  2   , the display panel provided by the embodiment of the present disclosure includes an array substrate  100 , the light-emitting functional layer  200 , an encapsulation layer  300 , a touch control layer  400 , the color filter layer  500 , and a coverplate  600  disposed in a stack from bottom to top. 
     Wherein, the array substrate  100  includes a substrate  110 , a semiconductor active layer  121 , a first insulating layer  131 , a first gate electrode layer  122 , a second insulating layer  132 , a second gate electrode layer  123 , a third insulating layer  133 , a source and drain electrode layer  124 , and a planarization layer  140  disposed in sequence from bottom to top. Wherein, the semiconductor active layer  121 , the first gate electrode layer  122 , the second gate electrode layer  123 , and the source and drain electrode layer  124  together form components such as thin film transistors and capacitors of the display panel. The semiconductor active layer  121  is patterned to form active areas of the thin film transistors, and the active areas include channel areas and doped areas disposed on both sides of the channel areas. A material of the semiconductor active layer  121  may be oxide semiconductor materials, polysilicon materials, or monocrystalline silicon materials, and is not limited herein. The first gate electrode layer  122  is patterned to form first gate electrodes of the thin film transistors and first electrode plates of the capacitors. The second gate electrode layer  123  is patterned to form second gate electrodes of the thin film transistors and second electrode plates of the capacitors. The first gate electrodes and the second gate electrodes correspond to the channel areas of the semiconductor active layer  121  at a same time. The source and drain electrode layer  124  is patterned to form source electrodes and drain electrodes of the thin film transistors, and the source electrodes and the drain electrodes are connected to the doped areas on both sides of the channel areas by penetrating through through-holes of the first insulating layer  131 , the second insulating layer  132 , and the third insulating layer  133 . The components, such as the thin film transistors and the capacitors, and signal lines of the array substrate together constitute driving circuits of the display panel  10  to drive the light-emitting functional layer  200  to emit light and display. The first insulating layer  131  is disposed between the semiconductor active layer  121  and the first gate electrode layer  122 , the second insulating layer  132  is disposed between the first gate electrode layer  122  and the second gate electrode layer  123 , and the third insulating layer  133  is disposed between the second gate electrode layer  123  and the source and drain electrode layer  124 . The first insulating layer  131 , the second insulating layer  132 , and the third insulating layer  133  are configured to isolate two conductive layers adjacent thereto, respectively. The planarization layer  140  is disposed on the source and drain electrode layer  124  and is configured to planarize the array substrate to provide a flat base for manufacturing the light-emitting functional layer  200  on the planarization layer  140 . A material of the planarization layer  140  is generally organic layers, which includes, but is not limited to, acrylates, polyimide (PI), or benzocyclobutene (BCB). The array substrate  100  may also be other structure that is familiar to the skilled person in the art, a structure of the array substrate mentioned above is only used to illustrate a structure of the display panel provided in the embodiment of the present disclosure, and is not limited to this. 
     In an embodiment, the substrate  110  includes a first substrate  111  in the first display area  11  and a second substrate  112  in the second display area  12 , and the first substrate  111  and the second substrate  112  are disposed in a same layer and have a same thickness. In an embodiment, materials of the first substrate  111  and the second substrate  112  are same, and the first substrate  111  and the second substrate  112  are manufactured by a same process. The first substrate  111  and the second substrate  112  are transparent substrates, and both may be transparent rigid substrates such as highly transparent glass or may be transparent flexible substrates such as transparent polyimide (colorless polyimide, CPI) thin films. In another embodiment, the materials of the first substrate  111  and the second substrate  112  are different. The first substrate  111  is a transparent substrate, which may be a transparent rigid substrate such as highly transparent glass or may be a transparent flexible substrate such as a transparent polyimide (colorless polyimide, CPI) thin film, and the second substrate  112  is a non-transparent substrate or a substrate having very low transparency, such as a yellow polyimide (YPI) thin film or glass having low transparency. 
     This embodiment improves the light transmittance in the first display area  11  of the display panel by setting the first substrate  111  in the first display area  11  to be the transparent substrate. Therefore, the light transmittance in the light-transmitting areas TA of the display panel can be further improved, thereby improving the image-taking effect of the under-screen cameras. 
     Wherein, the light-emitting functional layer  200  includes a first electrode layer  210 , a pixel definition layer  220 , a first luminous auxiliary layer  230 , a light-emitting material layer  240 , a second luminous auxiliary layer  250 , and a second electrode layer  260  disposed in a stack from bottom to top. Wherein, the first electrode layer  210  is disposed on the planarization layer  140  and is patterned to form first electrodes  210  that are disposed at intervals and are independent of each other. In the first display area  11 , each of the first electrodes  210  is disposed in a corresponding first pixel area AA, and in the second display area  12 , each of the first electrodes  210  is disposed in a corresponding second pixel area BA. The first electrodes  210  are connected to the source electrodes or the drain electrodes of the thin film transistors below by penetrating through through-holes of the planarization layer  140 , thereby connecting to the driving circuits of the display panel. The pixel definition layer  220  is disposed on the first electrode layer  210  and is patterned to form openings of the pixel definition layer. In the first display area  11 , the openings are defined in the first pixel areas AA, correspond to the first electrodes  210  by one to one, and expose the first electrodes  210 , and in the second display area  12 , the openings are defined in the second pixel areas BA, correspond to the first electrodes  210  by one to one, and expose the first electrodes  210 . The first luminous auxiliary layer  230  is disposed on the pixel definition layer  220  as a whole layer and covers the pixel definition layer  220  and the first electrodes  210 . The first luminous auxiliary layer  230  usually includes a hole transport layer and a hole injection layer, and the hole injection layer is disposed between the hole transport layer and the light-emitting material layer  240 . The light-emitting material layer  240  is disposed in the openings of the pixel definition layer  220  and corresponds to the first electrodes  210  under the openings by one to one. The light-emitting material layer  240  includes first light-emitting material layers  241 , second light-emitting material layers  242 , and third light-emitting material layers  243  that have different colors, the first light-emitting material layers  241 , the second light-emitting material layers  242 , and the third light-emitting material layers  243  are disposed in a same layer and are respectively positioned in different pixel openings, and the first light-emitting material layers  241 , the second light-emitting material layers  242 , and the third light-emitting material layers  243  may be red light-emitting material layers, green light-emitting material layers, and blue light-emitting material layers, respectively. The second luminous auxiliary layer  250  is disposed on the light-emitting material layer  240  and covers the light-emitting material layer  240  and the first luminous auxiliary layer  230 . The second luminous auxiliary layer  250  usually includes an electron transport layer and an electron injection layer, and the electron injection layer is disposed between the electron transport layer and the light-emitting material layer  240 . The second electrode layer  260  is disposed on the second luminous auxiliary layer  250 , and is usually a conductive layer formed by a non-transparent metal. A material of the second electrode layer  260  includes, but is not limited to, metals, such as silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), or calcium (Ca), and alloys thereof. The red light-emitting material layers, the first electrode layer  210  and the first luminous auxiliary layer  230  positioned under the red light-emitting material layers, and the second luminous auxiliary layer  250  and the second electrode layer  260  positioned on the red light-emitting material layers together constitute the red pixel light-emitting units. The green light-emitting material layers, the first electrode layer  210  and the first luminous auxiliary layer  230  positioned under the green light-emitting material layers, and the second luminous auxiliary layer  250  and the second electrode layer  260  positioned on the green light-emitting material layers together constitute the green pixel light-emitting units. The blue light-emitting material layers, the first electrode layer  210  and the first luminous auxiliary layer  230  positioned under the blue light-emitting material layers, and the second luminous auxiliary layer  250  and the second electrode layer  260  positioned on the blue light-emitting material layers together constitute the blue pixel light-emitting units. 
     In an embodiment, as shown in  FIG.  2   , in the second display area  12 , the second electrode layer  260  is disposed as a whole layer, that is, the second electrode layer  260  completely covers the second luminous auxiliary layer  250  in the second display area  12 . In the first display area  11 , the second electrode layer  260  is defined with openings of the second electrode layer at positions corresponding to the gaps among the light-filtering units, that is, no second electrode layer  260  is disposed in the light-transmitting areas TA. A distance from edges of the openings of the second electrode layer to edges of the light-transmitting areas TA ranges from 0 to 5 μm. Each opening area of the second electrode layer  260  is greater than or equal to an area of each of the light-transmitting areas TA, that is, no second electrode layer  260  is disposed in whole light-transmitting areas TA; or each opening area of the second electrode layer  260  is less than the area of each of the light-transmitting areas TA, that is, a part of each of the light-transmitting areas TA is not provided with the second electrode layer  260 . 
     In the first display area  11 , this embodiment defines the openings of the second electrode layer at the positions of the second electrode layer  260  that correspond to the gaps among the light-filtering units, and further, a projection of the openings of the second electrode layer on the color filter layer  500  falls within a plane range of the gaps among the first light-filtering units. Thus, in the light-transmitting areas TA, no black matrix layer is disposed and only the transparent planarization layer  530  is retained in the color filter layer  500  that is positioned in an upper layer, and no second electrode layer is disposed and only the pixel definition layer  220 , the first luminous auxiliary layer  230 , and the second luminous auxiliary layer  250  that are transparent are retained in the light-emitting functional layer  200  that is positioned in a lower layer, thereby preventing a black light-shielding layer or a metal reflective layer from shielding light and further improving the light transmittance in the light-transmitting areas TA of the display panel. Therefore, it is beneficial to improve the image-taking effect of the under-screen cameras. In addition, this embodiment prevents uneven brightness of the display panel caused by the second electrode layer reflecting external ambient light due to no black matrix layer being disposed in the gaps among the light-filtering units by defining openings of the second electrode layer at the positions of the second electrode layer  260  that correspond to the gaps among the light-filtering units. 
     Wherein, the encapsulation layer  300  is disposed on the second electrode layer  260 . The encapsulation layer  300  generally includes a first organic encapsulation layer, a second organic encapsulation layer, and an inorganic encapsulation layer disposed between the first organic encapsulation layer and the second organic encapsulation layer. The first organic encapsulation layer and the second organic encapsulation layer are configured to planarize the light-emitting functional layer and improve flexibility of the display panel, and the inorganic encapsulation layer is configured to isolate external water and oxygen or impure ions from entering the light-emitting functional layer. Wherein, the first organic encapsulation layer is disposed on the second electrode layer  260 , fills openings of the pixel definition layer  220  and the openings of the second electrode layer  26 , and covers the second electrode layer  260  and the second luminous auxiliary layer  250 . The inorganic encapsulation layer is disposed on the first organic encapsulation layer as a whole layer, and the second organic encapsulation layer is disposed on the inorganic encapsulation layer as a whole layer. 
     Wherein, the touch control layer  400  is disposed on the encapsulation layer  300  and includes touch control electrodes  410 . The touch control electrodes  410  may be self-capacitive touch control electrodes or mutual-capacitive touch control electrodes. The touch control electrodes  410  may be touch control electrodes constituted by a single metal layer or two metal layers. The touch control electrodes  410  may be mesh-shaped metal electrodes or flat metal electrodes. A specific structure of the touch control electrodes in the embodiments of the present disclosure is not limited. 
     In an embodiment, as shown in  FIG.  2   , the touch control electrodes  410  are disposed in the second display area  12 , and there is no touch control electrode  410  in the first display area  11 . The touch control electrodes commonly used in current technology are mesh-shaped metal electrode structures, and mesh lines of the touch control electrodes are positioned in interval areas among pixel areas, so in the first display area  11 , the mesh lines of the touch control electrodes will shield light from transmitting through the light-transmitting areas TA, thereby reducing the light transmittance in the light-transmitting areas TA of the display panel. This embodiment prevents the touch control electrodes from shielding light that transmits through the light-transmitting areas TA by removing the touch control electrodes in the first display area  11 . Thus, in the light-transmitting areas TA, no black matrix layer is disposed and only the transparent planarization layer  530  is retained in the color filter layer  500  that is positioned in an upper layer, no touch control electrode is disposed in the touch control layer  400  that is positioned in a middle layer, and no second electrode layer is disposed and only the pixel definition layer  220 , the first luminous auxiliary layer  230 , and the second luminous auxiliary layer  250  that are transparent are retained in the light-emitting functional layer  200  that is positioned in a lower layer, thereby preventing the black light-shielding layer or the metal reflective layer from shielding light and further improving the light transmittance in the light-transmitting areas TA of the display panel. Therefore, it is beneficial to improve the image-taking effect of the under-screen cameras. In addition, this embodiment prevents uneven brightness of the display panel caused by the touch control electrodes reflecting the external ambient light due to no black matrix layer being disposed in the gaps among the light-filtering units by removing the touch control electrodes in the first display area  11 . 
     Wherein, the coverplate  600  is disposed on the color filter layer  500  and includes a transparent substrate  610  and an anti-reflection film  620 . The transparent substrate  610  is disposed on the color filter layer  500 , and the anti-reflection film  620  is disposed on the transparent substrate  610  and is positioned in the first display area  11 . The anti-reflection film  620  is a coating layer, film, or glass that has anti-reflection properties. The anti-reflection film  620  is a single-layered structure, a double-layered structure, or a multi-layered structure having three or more than three layers, and specifically includes, but is not limited to, a single-layered magnesium fluoride thin film, a double-layered magnesium fluoride/zirconia thin film, or a multi-layered silicon oxide/titanium oxide/silicon oxide/titanium oxide thin film. In one aspect, in the first display area  11 , the color filter layer  500  only includes the light-filtering units and the transparent planarization layer  530 , and lacks the black matrix layer  510 , so the display panel reduces reflections to ambient light only by the light-filtering units. Therefore, an anti-reflection effect of the first display area  11  on the ambient light is lower than an anti-reflection effect of the second display area  12  on the ambient light. In another aspect, the transparent substrate  610  has a very strong reflection effect on external light due to its mirror effect, so the light transmittance of the display panel will be greatly reduced. Therefore, this embodiment of the present disclosure disposes the anti-reflection film  620  on one side of the transparent substrate  610  away from the color filter layer  500  in the first display area  11 , thereby reducing reflections of the display panel to the ambient light in the first display area  11  by an anti-reflection effect of the anti-reflection film  620  and improving the light transmittance in the first display area  11  of the display panel. Meanwhile, the anti-reflection effect of the anti-reflection film  620  further improves the light transmittance in the first display area  11  of the display panel, thereby improving the light transmittance in the light-transmitting areas TA of the display panel and further improving the image-taking effect of the under-screen cameras. 
     Correspondingly, an embodiment of the present disclosure further provides a display device, which includes any one of the display panels provided in the embodiments of the present disclosure and has technical features and technical effects of the display panels. For specific implementation and working principles, please refer to the specific embodiments mentioned above, and they will not be repeated here. 
     In summary, the embodiments of the present disclosure provide the display panel and the display device. The display panel prevents the black matrix layer from shielding the light-transmitting areas by removing the black matrix layer in the first display area and adopting the transparent filling layer to fill the light-transmitting areas among the light-filtering units, thereby greatly improving the light transmittance in the light-transmitting areas of the display panel and thus, improving the image-taking effect of the under-screen cameras. Further, the anti-reflection film is disposed on the coverplate in the first display area of the display panel, thereby reducing the reflections of the display panel to the ambient light in the first display area by the anti-reflection effect of the anti-reflection film and improving the light transmittance in the first display area of the display panel. The anti-reflection effect of the anti-reflection film further improves the light transmittance in the first display area of the display panel, thereby improving the light transmittance in the light-transmitting areas of the display panel and further improving the image-taking effect of the under-screen cameras. Further, the display panel prevents the touch control electrodes from shielding the light-transmitting areas by removing the touch control electrodes in the first display area, thereby further improving the light transmittance in the light-transmitting areas of the display panel and improving the image-taking effect of the under-screen cameras. Further, the display panel defines the openings on the second electrode layer at positions corresponding to the light-transmitting areas, and no second electrode layer is disposed in the openings, thereby further improving the light transmittance in the light-transmitting areas of the display panel and improving the image-taking effect of the under-screen cameras. Further, the first substrate in the first display area of the display panel is set to be the transparent substrate, thereby further improving the light transmittance in the light-transmitting areas of the display panel and improving the image-taking effect of the under-screen cameras. 
     The display panel and the display device provided by the embodiments of the present disclosure are described in detail above. Specific examples are used herein to explain the principles and implementation of the present disclosure. The descriptions of the above embodiments are only used to help understand the method of the present disclosure and its core ideas; meanwhile, for those skilled in the art, the range of specific implementation and application may be changed according to the ideas of the present disclosure. In summary, the content of the specification should not be construed as causing limitations to the present disclosure.