CN110061038B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN110061038B CN110061038B CN201910344397.9A CN201910344397A CN110061038B CN 110061038 B CN110061038 B CN 110061038B CN 201910344397 A CN201910344397 A CN 201910344397A CN 110061038 B CN110061038 B CN 110061038B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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Abstract
The invention discloses a display panel and a display device. The display panel comprises a display area, and the display area comprises a first display area and a second display area; the display panel further comprises a substrate base plate and an organic light-emitting device layer, wherein the organic light-emitting device layer is positioned on the substrate base plate and comprises a plurality of organic light-emitting units, and the density of the organic light-emitting units in the first display area is smaller than that of the organic light-emitting units in the second display area; the light transmittance of the first display region is greater than the light transmittance of the second display region. According to the technical scheme provided by the embodiment of the invention, the first display area can transmit a large amount of light, and when the optical electronic element is arranged on the side, deviating from the light emitting surface, of the display panel in the first display area, the optical electronic element can receive sufficient light, so that the beneficial effect of improving the performance of the optical electronic element is achieved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.
Background
The organic light emitting display device has advantages of self-light emission without backlight, low power consumption, high brightness, and the like, and is widely applied to various electronic devices.
With the continuous improvement of the requirement of the user for high screen ratio, the organic light emitting unit device of the optical electronic element under the screen becomes a research hotspot, specifically, the organic light emitting unit of the optical electronic element under the screen sets the optical electronic element at one side of the display panel deviating from the light emitting surface of the display panel in the display area, and under the influence of the organic light emitting unit in the display panel, the brightness received by the optical electronic element is less, and the normal working requirement of the display panel cannot be met.
Disclosure of Invention
The invention provides a display panel and a display device, so that when an optical electronic element is arranged on one side of the display panel in a first display area, which is far away from a light emitting surface of the display panel, the optical electronic element can receive sufficient light, and the beneficial effect of improving the performance of the optical electronic element is further achieved.
In a first aspect, an embodiment of the present invention provides a display panel, including a display area, where the display area includes a first display area and a second display area;
the display panel further comprises a substrate base plate and an organic light-emitting device layer, wherein the organic light-emitting device layer is positioned on the substrate base plate and comprises a plurality of organic light-emitting units, and the density of the organic light-emitting units in the first display area is smaller than that of the organic light-emitting units in the second display area;
the light transmittance of the first display region is greater than the light transmittance of the second display region.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel according to the first aspect.
The display panel provided by the embodiment of the invention comprises a display area, wherein the display area comprises a first display area and a second display area, the display panel also comprises a substrate and an organic light-emitting device layer, the organic light-emitting device layer is positioned on the substrate, the organic light-emitting device layer comprises a plurality of organic light-emitting units, the density of the organic light-emitting units in the first display area is smaller than that of the organic light-emitting units in the second display area, and the first display area can transmit a large amount of light by setting the light transmittance of the first display area to be larger than that of the second display area, so that when an optical electronic element is arranged on the side, deviating from the light-emitting surface, of the display panel in the first display area, the optical electronic element can receive sufficient light, and the beneficial effect of improving the performance of the optical electronic element is achieved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure within the dashed box of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along the dashed line AB of FIG. 2;
FIG. 4 is a schematic view of a further cross-sectional configuration taken along the dashed line AB of FIG. 2;
FIG. 5 is a schematic view of a further cross-sectional configuration taken along the dashed line AB of FIG. 2;
FIG. 6 is a schematic cross-sectional view taken along the dashed line CD in FIG. 2;
FIG. 7 is a schematic view of a further cross-sectional configuration taken along the dashed line AB of FIG. 2;
FIG. 8 is a schematic view of a further cross-sectional configuration taken along the dashed line AB of FIG. 2;
fig. 9 is a schematic structural diagram of a second electrode in a first display region according to an embodiment of the disclosure;
FIG. 10 is a schematic view of a further cross-sectional configuration taken along the dashed line AB of FIG. 2;
FIG. 11 is a schematic view of a further cross-sectional configuration taken along the dashed line AB of FIG. 2;
FIG. 12 is a schematic view of a further cross-sectional configuration taken along the dashed line AB of FIG. 2;
FIG. 13 is a diagram of a display panel according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the display panel and the display device according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
The embodiment of the invention provides a display panel, which comprises a display area, a first display area and a second display area, wherein the display area comprises the first display area and the second display area;
the display panel further comprises a substrate base plate and an organic light-emitting device layer, wherein the organic light-emitting device layer is positioned on the substrate base plate and comprises a plurality of organic light-emitting units, and the density of the organic light-emitting units in the first display area is smaller than that of the organic light-emitting units in the second display area;
the light transmittance of the first display region is greater than the light transmittance of the second display region.
The display panel provided by the embodiment of the invention comprises a display area, wherein the display area comprises a first display area and a second display area, the display panel also comprises a substrate and an organic light-emitting device layer, the organic light-emitting device layer is positioned on the substrate, the organic light-emitting device layer comprises a plurality of organic light-emitting units, the density of the organic light-emitting units in the first display area is smaller than that of the organic light-emitting units in the second display area, and the first display area can transmit a large amount of light by setting the light transmittance of the first display area to be larger than that of the second display area, so that when an optical electronic element is arranged on the side, deviating from the light-emitting surface, of the display panel in the first display area, the optical electronic element can receive sufficient light, and the beneficial effect of improving the performance of the optical electronic element is achieved.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other embodiments that depart from the specific details disclosed herein, and it will be recognized by those skilled in the art that the present invention may be practiced without these specific details.
Next, the present invention is described in detail with reference to the schematic drawings, and in the detailed description of the embodiments of the present invention, the schematic drawings showing the structure of the device are not partially enlarged in general scale for convenience of description, and the schematic drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and height should be included in the actual fabrication.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention. As shown in fig. 1, the display panel 1 includes a display area 2, and the display area 2 includes a first display area 10 and a second display area 20. Fig. 2 is a schematic diagram of the structure within the dashed box of fig. 1. Fig. 3 is a schematic sectional view along the broken line AB in fig. 2. As shown in fig. 3, the display panel further includes a substrate base plate 110 and an organic light emitting device layer 120, the organic light emitting device layer 120 being on the substrate base plate 110, the organic light emitting device layer 120 including a plurality of organic light emitting units 121. Referring to fig. 2, the density of the organic light emitting units 121 in the first display region 10 is less than the density of the organic light emitting units 121 in the second display region 20, and referring to fig. 3, the light transmittance of the first display region 10 is greater than the light transmittance of the second display region 20, specifically, fig. 3 identifies light rays by line segments with arrows, and the arrow direction represents the propagation direction of the light rays.
It should be noted that the area where the organic light emitting unit 121 is located is a non-light-transmitting area, and therefore, the higher the density of the organic light emitting units 121 is, the lower the light transmittance in the corresponding area is, and it is obvious that on the premise that the density of the organic light emitting units 121 in the first display area 10 is smaller than the density of the organic light emitting units 121 in the second display area 20, the light transmittance of the first display area 10 is necessarily larger than the light transmittance of the second display area 20. It is understood that the structure of the film layer in the first display region 10 may be modified to further increase the light transmittance of the first display region 10, and for example, at least a portion of the transparent film layer in the first display region 10 may be thinned or removed.
With continued reference to fig. 3, the display panel further includes an encapsulation layer 210 opposite the base substrate 110. By way of example, the encapsulation layer 210 may be a rigid encapsulation substrate, as shown in fig. 3; the sealing film may be a flexible sealing film, and this embodiment is not particularly limited thereto.
The display panel provided by the embodiment comprises a display area, the display area comprises a first display area 10 and a second display area 20, the display panel further comprises a substrate 110 and an organic light-emitting device layer 120, the organic light-emitting device layer 120 is located on the substrate 110, the organic light-emitting device layer 120 comprises a plurality of organic light-emitting units 121, the density of the organic light-emitting units 121 in the first display area 10 is smaller than that of the organic light-emitting units 121 in the second display area 20, the light transmittance of the first display area 10 is larger than that of the second display area 20, so that the first display area 10 can transmit a large amount of light, when the display panel deviates from one side of the light-emitting surface of the display panel in the first display area 10, the optical electronic elements can receive sufficient light, and the beneficial effect of improving the performance of the optical electronic elements is achieved.
With continued reference to fig. 2 and 3, the first display region 10 includes a light-transmitting region 11 and a non-light-transmitting region 12, and the signal lines 301 between the organic light emitting units 121 and the organic light emitting units 121 are located in the non-light-transmitting region 12 in the first display region 10. In order to simplify the structure of the drawing, fig. 3 shows only the signal lines 301 in the first display region 10, and in the actual display panel structure, the signal lines 301 are also provided in the second display region 20.
Fig. 4 is a schematic view of another cross-sectional structure along the dashed line AB in fig. 2. As shown in fig. 4, the display panel 1 further includes a polarizer 130, the polarizer 130 is located on a side of the organic light emitting device layer 120 away from the substrate 110, the polarizer 130 includes a first hollow structure 131, and a vertical projection of the first hollow structure 131 on the substrate 110 at least partially overlaps a vertical projection of the light transmitting area 11 on the substrate 110.
It should be noted that, in this embodiment, the position relationship between the first hollow structure 131 and the light-transmitting area 11 is not limited, and all the schemes that the first hollow structure 131 and the light-transmitting area 11 have an overlapping portion are within the protection scope of this embodiment, for example, the vertical projection of the first hollow structure 131 on the substrate base plate 110 may coincide with the vertical projection of the first display area 10 on the substrate base plate 110, as shown in fig. 4. It should be noted that, in the structure shown in fig. 4, the polarizer in the light-transmitting region 11 is completely removed, and the first hollow structure 131 is a single structure with a relatively large area, which is convenient for forming in terms of process.
It should be further noted that the polarizer 130 can process circularly polarized light into linearly polarized light, the light loss in the light processing process is close to 50%, and thus the polarizer 130 has a certain blocking effect on light, and therefore, removing the polarizer 130 with any area at any position in the light transmission region 11 can increase the light transmittance of the region, and further increase the light transmittance of the first display region 11, so that the condition that the first hollow structure 131 and the light transmission region 11 have the overlapping portion is within the protection range of the embodiment.
Further, fig. 5 is a schematic view of another cross-sectional structure along the dashed line AB in fig. 2. As shown in fig. 5, a vertical projection of the first hollow structure 131 on the substrate 110 overlaps a vertical projection of the light-transmitting region 11 on the substrate 110.
It should be noted that, by such an arrangement, on one hand, the polarizer 130 in the non-transmission region 12 is retained, and when there is no polarizer 130 in the first display region 10, the metal surface with a relatively large reflectivity in the first display region 10 reflects external light, so that a user can obviously observe his or her shadow in the display panel, thereby reducing user experience, and on the other hand, the polarizer 130 affecting the light transmittance of the first display region 10 is only located in the non-transmission region 12, so that the polarizer 130 in the transmission region 11 is completely removed in the above arrangement manner, thereby reducing the influence of the polarizer 130 on the light transmittance of the first display region 10 to the maximum extent.
It should be noted that fig. 3, fig. 4 and fig. 5 are schematic cross-sectional structural diagrams along a dashed line AB in fig. 2, in the first display area 10, the cross-sectional line AB passes through the signal line 301, and in the second display area 20, the cross-sectional line AB passes through the organic light emitting unit 121, and in order to simplify the structure of the drawings, only the signal line 301 and the organic light emitting unit 121 are illustrated, so that the two are arranged as a same layer, but in practice, the signal line 301 and the organic light emitting unit 121 are arranged in different layers, and the drawings are only schematic illustrations and are not completely the same as the actual structure of the display panel.
Fig. 6 is a schematic cross-sectional view along the dashed line CD in fig. 2. As shown in fig. 6, the display panel 1 further includes a black matrix 302 and a color filter layer, the black matrix 302 and the color filter layer are located in the non-light-transmitting region 12, the color filter layer includes a plurality of color filter blocks 313, the black matrix 302 defines a plurality of pixel regions 310, each pixel region 310 is provided with one organic light-emitting unit 121 and one color filter block 313, and in the same pixel region 310, the color filter block 313 is located on a side of the organic light-emitting unit 121 away from the substrate 110; the black matrix 302 covers the signal line 301.
It should be noted that, in the same pixel area 310, the color of the color filter block 313 is the same as the light emitting color of the organic light emitting unit 121, on one hand, the above-mentioned setting mode enables that in the non-transparent area where no polarizer is set, the filtering function of the color filter block 313 can prevent the metal surface with higher reflectivity in the non-transparent area 12 from reflecting natural light, and further prevent the reflected light from entering human eyes and causing users to observe their shadows in the display panel 1 and affecting the display effect, and because the second display area 20 is set with a polarizer, the display difference exists between the first display area 10 and the second display area 20, the above-mentioned setting mode can also reduce the display difference between the first display area 10 and the second display area 20, and improve the uniformity of the display panel, on the other hand, the black matrix 302 can cover the gap between the adjacent signal lines 301, the diffraction of the small gap to the external incident natural light is avoided, and when the optical electronic element is arranged in the first display area 10, the light received by the optical electronic element does not contain the diffraction light, so that the definition of the signal detected by the optical electronic element is improved.
Fig. 7 is a schematic view of another cross-sectional structure taken along the dashed line AB in fig. 2. As shown in fig. 7, the display region includes a first display region 10 and a second display region 20, the first display region 10 includes a non-light-transmitting region 12 and a light-transmitting region 11, the organic light emitting device layer 120 includes a plurality of organic light emitting units 121, and further includes a planarization layer 405 and a pixel defining layer 406, the planarization layer 405 is located on one side of the plurality of organic light emitting units 121 close to the substrate 110, the pixel defining layer 406 defines a region where the plurality of organic light emitting units 121 are located, the organic light emitting units 121 include a first electrode 504, an organic light emitting functional layer 505, and a second electrode 506 that are sequentially stacked, the second electrodes 506 of the plurality of organic light emitting units 121 are connected to each other as a second electrode layer 510, and the thickness of the second electrode layer 510 in the light-transmitting region 11 is smaller than the thickness of the second electrode layer 510 in the second display region 20.
Illustratively, the first electrode 504 and the second electrode 505 may be an anode and a cathode, respectively.
It should be noted that, the second electrode 505 is a semitransparent structure, and has a certain blocking effect on light, the second electrode layer 510 in the light transmission region 11 is thinned, so that the blocking of the second electrode layer 510 in the region to light can be reduced, and further the light transmittance of the light transmission region 11 is improved, because the light transmission region 11 in the first display region 10 is the only light-permeable region, the light transmittance of the first display region 10 is improved by the improvement of the light transmittance of the light transmission region 11, and further when the optical electronic element is disposed on the side of the display panel 1 deviating from the light emitting surface in the first display region 10, the optical electronic element can receive more light to improve the device performance.
Alternatively, fig. 8 is a schematic view of another cross-sectional structure along the dashed line AB in fig. 2. As shown in fig. 8, the thickness of the second electrode layer 510 in the non-light-transmitting region 12 is equal to the thickness of the second electrode layer 510 in the light-transmitting region 11.
It should be noted that, with such an arrangement, when the second electrode layer 510 is thinned by using a photolithography technique, the region to be thinned of the second electrode layer 510 may correspond to one mask hole in an exposure mask, and the size of the mask hole may be relatively large, thereby reducing the difficulty in preparing the exposure mask.
Referring to fig. 8, the thickness of the second electrode layer 510 in the light-transmitting region 11 is a, the thickness of the second electrode layer 510 in the second display region 20 is b, and the value range of a/b is 1/2-2/3.
It should be noted that, too large thinning thickness of the second electrode layer 510 may increase the luminance difference of the organic light emitting units 121 in the first display area 10 and the second display area 20, and further increase the display effect difference between the first display area 10 and the second display area 20, and too small thinning thickness of the second electrode layer 510 may cause an insignificant increase effect on the light transmittance of the first display area 11, and experiments prove that, when the value range of a/b is 1/2-2/3, the thinning thickness of the second electrode layer 510 may not only effectively increase the light transmittance of the first display area 10, but also reduce the display effect difference between the first display area 10 and the second display area 20.
Optionally, fig. 9 is a schematic structural diagram of a second electrode in a first display area according to an embodiment of the present invention. As shown in fig. 9, the thickness of the second electrode layer 510 is gradually reduced along a direction X in which the edges P of the first and second display regions point to the geometric center O of the first display region.
It is understood that in other embodiments of the present embodiment, the thinning-out end point of the second electrode layer 510 may be located between the edge P and the geometric center O of the first display region, and the thickness of the second electrode layer 510 in the region between the thinning-out end point and the geometric center O of the first display region is a certain value.
In addition, the organic light emitting functional layer emits light under the action of an electric field formed between the first electrode and the second electrode, to light the organic light emitting unit, the parameters of the light emitting brightness of the organic light emitting unit, etc. are related to the electric field between the first electrode and the second electrode, and under the condition that the voltage of the first electrode is not changed, the electric field is related to the voltage on the second electrode, which is equal to the product of the current through its cross-section and its resistance, and the conventional display panel is driven by current, so that the current through the cross-section of the second electrode is unchanged after the second electrode is thinned, however, the resistance increases, which causes a change in the electric field between the first electrode and the second electrode, and a difference occurs in the luminance of the organic light emitting unit in the first display region and the luminance of the organic light emitting unit in the second display region, which causes a display difference between the first display region and the second display region.
The above-mentioned mode of setting up makes along the direction of the edge P of first display area and second display area directional first display area's geometric centre O, and the thickness of second electrode layer 510 reduces gradually, and the difference step of showing between first display area and the second display area reduces, has reduced the influence of second electrode layer 510 attenuate to display panel display effect, has promoted user experience.
Fig. 10 is a schematic view of another cross-sectional structure taken along the dashed line AB in fig. 2. As shown in fig. 10, the thickness of the second electrode layer 510 in the light-transmitting region 11 is 0.
It should be noted that, with such an arrangement, the second electrode layer 510 in the light-transmitting region 11 is completely removed, so that the effect of the second electrode layer 510 on reducing the light transmittance of the first display region 10 is minimized, and thus the light transmittance of the first display region 10 is effectively increased, which is beneficial to improving the performance of the optical electronic element arranged on the side of the display panel 1 deviating from the light-emitting surface of the display panel in the first display region 10. In addition, in such an arrangement, the thickness of the second electrode 506 in the organic light emitting unit 121 in the first display region 10 may be equal to the thickness of the second electrode 506 in the organic light emitting unit 121 in the second display region 20, thereby reducing the display difference between the first display region 10 and the second display region 20.
Fig. 11 is a schematic view of another cross-sectional structure taken along the dashed line AB in fig. 2. As shown in fig. 11, a pixel circuit layer 140 is disposed on the base substrate 110, and the pixel circuit layer 140 is located between the base substrate 110 and the organic light emitting device layer 120. The pixel circuit layer 140 includes an active layer 501, a gate insulating layer 401, a gate metal layer 502, an interlayer insulating layer 410, a source drain metal layer 503, and a passivation layer 404 sequentially arranged along a light emitting direction Z of the display panel, at least one of the planarization layer 405, the pixel definition layer 406, the gate insulating layer 401, the interlayer insulating layer 410, and the passivation layer 404 includes a second hollow structure 132, and a vertical projection of the second hollow structure 132 on the substrate 110 falls within a range of a vertical projection of the light transmissive region 11 on the substrate 110.
As shown in fig. 11, the interlayer insulating layer 410 includes a first interlayer insulating layer 402 and a second interlayer insulating layer 403.
It should be noted that the planarization layer 405, the pixel defining layer 406, the gate insulating layer 401, the interlayer insulating layer 410, and the passivation layer 404 are all light-permeable film layers, but the light transmittance cannot reach 100%, and all have a certain blocking effect on light, and reducing one or more of the above film layers in at least part of the light-permeable region 11 can achieve the beneficial effect of increasing the light transmittance in the first display region 10.
It should be noted that fig. 11 only illustrates the removal of the passivation layer 404 in the light-transmitting area 11, but not limited to the technical solution, in other embodiments of this embodiment, the number and the position of the light-transmitting film layers removed in the light-transmitting area 11 may be other situations, and all the situations where the light-transmitting film layers in the light-transmitting area 11 have removed portions are within the protection scope of this embodiment.
Fig. 12 is a schematic view of another cross-sectional structure taken along the dashed line AB in fig. 2. In the display panel shown in fig. 11, as shown in fig. 12, a buffer layer 407 is provided between the substrate base plate 110 and the pixel circuit layer 140. The buffer layer 407 includes a plurality of third hollow structures 133, and a vertical projection of the third hollow structures 133 on the substrate 110 is within a vertical projection range of the light-transmitting region 11 on the substrate 110.
It should be noted that the buffer layer 407 is a light-permeable film layer, but the light transmittance cannot reach 100%, and the buffer layer 407 in at least a part of the light-permeable region 11 is removed to have a certain light blocking effect, so that the light transmittance of the first display region 10 can be improved.
Fig. 13 is a schematic diagram of a display panel according to an embodiment of the present invention. As shown in fig. 13, the first display area 10 is used to display one or more of a power symbol, a clock symbol, and a network symbol as a notification bar.
It should be noted that fig. 13 is only illustrated by taking the first display area 10 for displaying two same-type symbols 601 as an example, and is not limited thereto, and all schemes in which the first display area 10 is used for displaying various independent symbols are within the protection scope of the present embodiment.
It should be further noted that, due to the arrangement, the first display area 10 and the second display area 20 respectively display different pictures, so that the display effect difference between the first display area 10 and the second display area 20 is reduced, and the use experience of the user is improved.
It is worth noting that the first electrode layer in at least part of the light transmission area is thinned or removed, the polarizer in at least part of the light transmission area is removed, and one or more film layers in the planarization layer, the pixel definition layer, the gate insulating layer, the interlayer insulating layer and the passivation layer in at least part of the light transmission area are removed, all the beneficial effects of improving the light transmittance of the first display area can be achieved, any one, any two or three of the three ways of improving the light transmittance of the first display area are commonly applied to the same display panel, and the situation shown in the drawing of the embodiment is not limited, and a person skilled in the art can select a proper combination way to improve the light transmittance of the first display area according to actual needs.
It should be noted that, the number and arrangement of the organic light emitting units in the first display area and the second display area are not limited in this embodiment, and are not limited to the case shown in the drawings of this embodiment.
Fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 14, the display device 3 includes the display panel 1 according to any embodiment of the present invention.
With continued reference to fig. 14, the display device 3 further includes an optical electronic element 31, the optical electronic element 31 is located in the first display region 10, and the optical electronic element 31 is located on a side of the substrate 110 away from the light emitting surface of the display panel 1.
It should be noted that, since the first display area 10 and the second display area 20 can be used for displaying, the display panel 1 can perform full-screen display, so as to obtain a full-screen display device.
Illustratively, the optical electronic element 31 may include one or more of a camera module, a light sensor, and an ultrasonic distance sensor.
For example, the display device 3 may be a mobile phone or a tablet, when the optoelectronic device 31 is a camera module, the first display area 10 corresponds to an area where a front-facing camera of the mobile phone or the tablet is located, the non-light-transmitting area in the first display area 10 is used for displaying, and the light-transmitting area in the first display area 10 is used for incident light to enter the front-facing camera and is used for the front-facing camera to collect an external image; when the optical electronic element 31 is a light sensor, the light sensor may be a light sensor for sensing external light and adjusting the brightness of the display device 3, or a light sensor for sensing whether there is a fingerprint outside to perform fingerprint identification; the light sensor also receives external light through the light-transmitting region of the first display region 10 and then senses the light, and the non-light-transmitting region of the first display region 10 is used to display an image together with the second display region 20.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (13)
1. A display panel is characterized in that a plurality of pixels are arranged in a matrix,
the display panel comprises a display area, and the display area comprises a first display area and a second display area;
the display panel further comprises a substrate base plate and an organic light-emitting device layer, wherein the organic light-emitting device layer is positioned on the substrate base plate and comprises a plurality of organic light-emitting units, and the density of the organic light-emitting units in the first display area is smaller than that of the organic light-emitting units in the second display area;
the light transmittance of the first display region is greater than the light transmittance of the second display region;
the first display area comprises a light-transmitting area and a non-light-transmitting area; the organic light-emitting device layer further comprises a planarization layer and a pixel defining layer, the planarization layer is positioned on one side, close to the substrate, of the plurality of organic light-emitting units, and the pixel defining layer defines the area where the plurality of organic light-emitting units are located;
in the first display area, the signal lines between the organic light emitting units and the organic light emitting units are positioned in the non-light-transmitting area; the display panel also comprises a polaroid, and the polaroid is positioned on one side of the organic light-emitting device layer, which is far away from the substrate base plate; the polaroid comprises a first hollow structure, and the vertical projection of the first hollow structure on the substrate base plate is at least overlapped with the vertical projection part of the light-transmitting area on the substrate base plate; and/or the presence of a gas in the gas,
a pixel circuit layer is arranged on the substrate base plate and is positioned between the substrate base plate and the organic light-emitting device layer; the pixel circuit layer comprises an active layer, a grid electrode insulating layer, a grid electrode metal layer, an interlayer insulating layer, a source drain electrode metal layer and a passivation layer which are sequentially arranged along the light emitting direction of the display panel, the planarization layer, the pixel definition layer, the grid electrode insulating layer, the interlayer insulating layer and at least one film layer in the passivation layer comprise second hollow structures, and the vertical projections of the second hollow structures on the substrate base plate fall in the range of the vertical projections of the light transmitting area on the substrate base plate.
2. The display panel according to claim 1, wherein a vertical projection of the first hollow structure on the substrate overlaps a vertical projection of the light-transmitting area on the substrate.
3. The display panel according to claim 1, wherein the display panel further comprises a black matrix and a color filter layer, the black matrix and the color filter layer being located in the non-light-transmitting region; the color filter layer comprises a plurality of color filter blocks, the black matrix defines a plurality of pixel areas, each pixel area is provided with one organic light-emitting unit and one color filter block, and the color filter blocks are positioned on one side of the organic light-emitting units, which is far away from the substrate, in the same pixel area; the black matrix covers the signal line.
4. The display panel according to claim 1, wherein the organic light emitting unit includes a first electrode, an organic light emitting functional layer, and a second electrode, which are sequentially stacked, and the second electrodes of the plurality of organic light emitting units are connected to each other as a second electrode layer;
the thickness of the second electrode layer in the light-transmitting area is smaller than that of the second electrode layer in the second display area.
5. The display panel according to claim 4, wherein the thickness of the second electrode layer is gradually reduced in a direction in which edges of the first display region and the second display region point to a geometric center of the first display region.
6. The display panel according to claim 4, wherein a thickness of the second electrode layer in the non-light-transmitting region is equal to a thickness of the second electrode layer in the light-transmitting region.
7. The display panel according to claim 4, wherein the thickness of the second electrode layer in the light-transmitting region is a, the thickness of the second electrode layer in the second display region is b, and a/b is 1/2-2/3.
8. The display panel according to claim 4, wherein a thickness of the second electrode layer in the light-transmitting region is 0.
9. The display panel according to claim 1, wherein a buffer layer is provided between the substrate base plate and the pixel circuit layer;
the buffer layer comprises a plurality of third hollow structures, and the vertical projection of the third hollow structures on the substrate base plate is within the vertical projection range of the light-transmitting area on the substrate base plate.
10. The display panel according to claim 1, wherein the first display area is configured to display one or more of a power symbol, a clock symbol, and a network symbol as a notification bar.
11. A display device characterized by comprising the display panel according to any one of claims 1 to 10.
12. The display device according to claim 11, further comprising an optical electronic element which is located in the first display region and which is located on a side of the substrate base plate away from a light emitting surface of the display panel.
13. The display device according to claim 12, wherein the optoelectronic device comprises one or more of a camera module, a light sensor, and an ultrasonic distance sensor.
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| CN201910344397.9A CN110061038B (en) | 2019-04-26 | 2019-04-26 | Display panel and display device |
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| CN201910344397.9A CN110061038B (en) | 2019-04-26 | 2019-04-26 | Display panel and display device |
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