CN115275059A - Display panel and display device - Google Patents
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- CN115275059A CN115275059A CN202210910627.5A CN202210910627A CN115275059A CN 115275059 A CN115275059 A CN 115275059A CN 202210910627 A CN202210910627 A CN 202210910627A CN 115275059 A CN115275059 A CN 115275059A
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Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises a substrate base plate and a plurality of light-emitting units positioned on one side of the substrate base plate, each light-emitting unit comprises a first electrode and a second electrode, and the second electrode is positioned on one side of the first electrode, which is far away from the substrate base plate; the second electrode comprises a first electrode part 1 and a second electrode part which are electrically connected with each other, the first electrode part and the first electrode are at least partially overlapped, and the second electrode part and the first electrode are at most partially overlapped along the thickness direction of the display panel; through setting up the transmissivity that second electrode portion is greater than the transmissivity of first electrode portion, carry out the differentiation design for the big visual angle light of luminescence unit outgoing has improved the big visual angle light-emitting rate of luminescence unit at second electrode portion transmission, can play the effect of the luminance decay of the monochromatic RGB of balanced synthetic white, has reduced big visual angle colour cast, has improved big visual angle display effect, has guaranteed that display panel normally shows.
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
At present, in an Organic Light Emitting Display (OLED) panel, when a large viewing angle color patch is larger than a standard, a problem of insufficient viewing effect of a large viewing angle is caused, which affects a Display effect.
Disclosure of Invention
The invention provides a display panel and a display device, wherein the transmittance of a cathode of a light-emitting unit is designed in a differentiation manner, so that the transmittance of the light-emitting unit with a large viewing angle is increased, the color cast of the large viewing angle is reduced, the brightness attenuation of white monochromatic RGB (red, green and blue) is balanced, the display effect with the large viewing angle is improved, and the normal display of the display panel is ensured.
In a first aspect, an embodiment of the present invention provides a display panel, including a substrate and a plurality of light emitting units located on one side of the substrate, where each light emitting unit includes a first electrode and a second electrode, and the second electrode is located on one side of the first electrode, which is far away from the substrate;
the second electrode comprises a first electrode part 1 and a second electrode part which are electrically connected with each other, the first electrode part is at least partially overlapped with the first electrode along the thickness direction of the display panel, and the second electrode part is at most partially overlapped with the first electrode;
wherein the transmittance of the second electrode portion is greater than the transmittance of the first electrode portion.
In a second aspect, an embodiment of the present invention further provides a display device, where the display device includes the display panel provided in the first aspect.
According to the display panel provided by the embodiment of the invention, the second electrode of the light-emitting unit is arranged into the first electrode part and the second electrode part which are mutually and electrically connected, and the first electrode part and the first electrode are at least partially overlapped along the thickness direction of the display panel, so that the light emission of the light-emitting unit is ensured; the second electrode part is overlapped with the first electrode at most, so that the second electrode part is prevented from shielding positive visual angle light and large visual angle light; the transmittance of the first electrode part and the transmittance of the second electrode part are designed in a differentiation mode, the transmittance of the second electrode part is larger than that of the first electrode part, so that the large-view-angle light emitted by the light emitting unit is transmitted by the second electrode part, the large-view-angle light emitting rate of the light emitting unit is improved, the brightness attenuation of white single-color RGB is balanced and synthesized, the large-view-angle color cast is reduced, the large-view-angle display effect is improved, and normal display of the display panel is guaranteed.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a display panel provided in the related art;
fig. 2 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
fig. 5 is a schematic surface structure diagram of a display panel according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of another display panel along direction AA' in FIG. 5;
FIG. 7 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a surface structure of another display panel according to an embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of the display panel of FIG. 9 along direction BB';
FIG. 12 is a schematic cross-sectional view of a display panel along direction BB' in FIG. 9;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic cross-sectional view of a display panel provided in the related art. As shown in fig. 1, a display panel 100 in the related art includes a substrate 101 and a plurality of light emitting units 10 located on one side of the substrate 101, where each light emitting unit 10 includes a first electrode 11 and a second electrode 12, the second electrode 12 is located on one side of the first electrode 11 away from the substrate 101, and the second electrode 12 is integrally disposed. The light-emitting unit 10 includes a red light-emitting unit (R), a green light-emitting unit (G) and a blue light-emitting unit (B), along with the change of the emergent light visual angle of the light-emitting unit 10, the second electrode 12 shields the light S1 with a large visual angle, so that the luminance attenuation of the synthesized white monochromatic RGB is different, when the visual angle is increased, the blue shift degree of the monochromatic RGB is also different, so that the chromaticity brightness of the white appears different along with the change of the visual angle, which causes the color cast of the large visual angle, the display effect with the large visual angle is not good, and the normal display of the display panel is affected.
Based on the above technical problems, the inventor has found that by reducing the transmittance of the electrode on the large-viewing-angle light emitting side of the light emitting unit and increasing the large-viewing-angle light emitting rate, the large-viewing-angle light emitting can be improved, the large-viewing-angle color cast can be reduced, and the normal display of the display panel can be ensured. Based on this, the inventors further studied the technical solutions of the embodiments of the present invention. Specifically, the embodiment of the invention provides a display panel, which comprises a substrate and a plurality of light-emitting units positioned on one side of the substrate, wherein each light-emitting unit comprises a first electrode and a second electrode, and the second electrode is positioned on one side of the first electrode, which is far away from the substrate; the second electrode comprises a first electrode part and a second electrode part which are electrically connected with each other, the first electrode part 21 at least partially overlaps with the first electrode, and the second electrode part 22 at most partially overlaps with the first electrode along the thickness direction of the display panel; wherein the transmittance of the second electrode portion is greater than the transmittance of the first electrode portion.
By adopting the technical scheme, the second electrode of the light-emitting unit is arranged into the first electrode part and the second electrode part which are electrically connected with each other, and the first electrode part and the first electrode are arranged to be at least partially overlapped along the thickness direction of the display panel, so that the light emission of the light-emitting unit is ensured; the second electrode part is overlapped with the first electrode part at most, and the transmittance of the second electrode part is greater than that of the first electrode part, so that the light with large visual angle emitted by the light-emitting unit is transmitted through the second electrode part, the light-emitting rate of the light-emitting unit with large visual angle is improved, the luminance attenuation of white monochromatic RGB is synthesized in a balanced manner, the color cast of the large visual angle is reduced, the display effect of the large visual angle is improved, and the normal display of the display panel is ensured.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. 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.
Fig. 2 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present invention; FIG. 3 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention; FIG. 4 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention; fig. 5 is a schematic surface structure diagram of a display panel according to an embodiment of the present invention; fig. 6 is a schematic cross-sectional view of another display panel along direction AA' in fig. 5. As shown in fig. 2 to fig. 6, the display panel 200 according to the embodiment of the present invention includes a substrate 201 and a plurality of light emitting units 30 located on one side of the substrate 201, where each light emitting unit 30 includes a first electrode 31 and a second electrode 32, and the second electrode 32 is located on one side of the first electrode 31 away from the substrate 201; the second electrode 32 includes a first electrode portion 321 and a second electrode portion 322 electrically connected to each other, the first electrode portion 321 at least partially overlaps the first electrode 31 in a thickness direction of the display panel (as shown in a Z direction in the figure), and the second electrode portion 322 at most partially overlaps the first electrode 31; the transmittance of the second electrode portion 322 is greater than that of the first electrode portion 321.
Specifically, the display panel 200 includes an organic light emitting display panel, an active matrix organic light emitting display panel, and the like, the substrate 201 of the display panel may be a rigid material such as glass or a silicon wafer, or may also be a flexible material such as ultra-thin glass, a metal foil, or a polymer plastic material, and the flexible or rigid substrate 201 may block oxygen and moisture, and prevent moisture or impurities from diffusing into the display panel through the substrate 201.
The Display panel 200 further includes a buffer layer 202, a pixel circuit layer 40, a pixel defining layer 203 and a plurality of Light Emitting units 30 sequentially disposed on one side of the substrate 201, as shown in fig. 2, the pixel defining layer 203 includes a plurality of pixel openings (not shown) corresponding to the Light Emitting units 30 one by one, the Light Emitting units 30 are disposed in the pixel openings, the Light Emitting units 30 include Organic Light Emitting Diodes (OLEDs), active-Matrix Organic Light Emitting diodes (AMOLEDs), and the like, and the pixel circuit layer 40 includes a plurality of Thin Film Transistors (TFTs) 50 for driving the Light Emitting units 30 to emit Light for Display. In this embodiment, fig. 2 illustrates a structure of a top-gate thin film transistor 50, where the pixel circuit layer 40 includes an active layer 51 on a buffer layer 202, a gate insulating layer 401 on the active layer 51, a gate layer 52 on the gate insulating layer 401, an interlayer insulating layer 402 on the gate layer 52, a source electrode 53 and a drain electrode 54 on the interlayer insulating layer 402, the source electrode 53 and the drain electrode 54 are electrically connected to a source region and a drain region on the active layer 51 through contact holes, respectively, and a planarization layer 403 on the source electrode 53 and the drain electrode 54 has a planarization effect; a connection electrode 22 on the planarization layer 403, the connection electrode 22 being electrically connected to the first electrode 31 of the light emitting unit 30 for supplying a light emitting voltage; and an interlayer insulating layer 404 between the first connection electrodes 22. In fig. 2, the first electrode 31 is an anode of the light emitting unit 30; in other embodiments, the first connection electrode 22 may also be electrically connected to the second electrode 32 of the light emitting unit 30 (not shown in the figure), and the second electrode 32 is a cathode of the light emitting unit 30. The gate insulating layer 401, the interlayer insulating layer 402, and the interlayer insulating layer 404 may be formed of an inorganic insulating layer such as silicon oxide or silicon nitride, and the planarization layer 403 may be formed of an organic insulating layer. Only three thin film transistors 50 and three corresponding light emitting units 30 are shown in fig. 2, so as to drive the light emitting units 30 to emit light, and the structures of more thin film transistors 50 are not shown one by one here.
As shown in fig. 2 to 6, in order to reduce the shielding of the second electrode 32 of the light emitting unit from the light with a large viewing angle, the second electrode 32 includes a first electrode portion 321 and a second electrode portion 322 electrically connected to each other, and the first electrode portion 321 and the second electrode portion 322 are designed to have different structures and different transmittances. The light emitting unit 30 further includes a light emitting layer 33 located between the first electrode portion 321 and the first electrode 31 in a thickness direction of the display panel (shown in a Z direction in the figure), and the driving voltage signal transmission is ensured by disposing the first electrode portion 321 to at least partially overlap the first electrode 31, so as to drive the light emitting layer 33 to display light. By arranging the second electrode part 322 to be at most partially overlapped with the first electrode 31, the second electrode part 322 can avoid shielding the positive viewing angle light ray S0 and the large viewing angle light ray S2; further, the first electrode portion 321 and the second electrode portion 322 can adopt different materials and/or different structures in different designs, the transmittance of the second electrode portion 322 is set to be greater than that of the first electrode portion 321, so that the large-viewing-angle light S2 emitted by the light emitting unit 30 is transmitted by the second electrode portion 322, and within the range allowed by the color shift of the small-viewing-angle light S0, the light emitting rate of the large-viewing-angle light S2 of the light emitting unit 30 can be improved, the luminance attenuation of white monochromatic RGB is effectively balanced, the large-viewing-angle color shift is reduced, the large-viewing-angle display effect is improved, and the normal display of the display panel is ensured.
It should be noted that the display device provided in this embodiment further includes other film layers, such as a film encapsulation layer (not shown), an encapsulation cover plate (not shown), and the like, which together function to realize the display function of the display device, where the film encapsulation layer may include at least three layers, which are not described herein one by one.
To sum up, in the display panel provided in the embodiment of the present invention, the second electrode of the light emitting unit is disposed as the first electrode portion and the second electrode portion that are electrically connected to each other, and the first electrode portion and the first electrode are disposed to at least partially overlap along the thickness direction of the display panel, so as to ensure that the light emitting unit emits light; the second electrode part is overlapped with the first electrode at most, so that the second electrode part is prevented from shielding positive visual angle light and large visual angle light; the transmittance of the first electrode part and the transmittance of the second electrode part are designed in a differentiation mode, the transmittance of the second electrode part is larger than that of the first electrode part, so that the large-view-angle light emitted by the light emitting unit is transmitted by the second electrode part, the large-view-angle light emitting rate of the light emitting unit is improved, the brightness attenuation of white single-color RGB is balanced and synthesized, the large-view-angle color cast is reduced, the large-view-angle display effect is improved, and normal display of the display panel is guaranteed.
As shown with continued reference to fig. 2 and 3, optionally, the first electrode portion 321 and the second electrode portion 322 are made of different materials.
Specifically, conductive materials with different transmittances can be selected, and the second electrode portion 322 and the first electrode portion 321 are respectively prepared in the preparation of the second electrode 32, so that the transmittance of the second electrode portion 322 is larger than that of the first electrode portion 321.
As shown in fig. 2 to 6, optionally, the material of the first electrode portion 321 includes a metal alloy, and the material of the second electrode portion 322 includes indium tin oxide.
Specifically, in order to ensure the driving efficiency of the first electrode portion 321 and the first electrode 31 for the light emitting layer 33, the first electrode portion 321 may be made of an alloy material having good conductivity and a certain transmittance, for example, a magnesium-silver alloy, a magnesium-silver ratio of 1:9, an alloy thickness of 100 to 120 angstroms, and a transmittance of 50 to 60%, or other metal alloy materials such as AlNd; the second electrode portion 322 may employ a transparent conductive material, such as a metal or a conductive oxide of ITO, GIZO, GZO, IZO (InZnO), or AZO (AlZnO). Through the design, signal transmission between the first electrode part 321 and the second electrode part 322 can be ensured, the transmissivity of the large-viewing-angle light ray S2 emitted by the light-emitting unit 30 at the second electrode part 322 can be increased, the luminance attenuation of white monochromatic RGB is balanced and synthesized, the large-viewing-angle color cast is reduced, and therefore the large-viewing-angle display effect is improved and the normal display of the display panel is ensured.
In a possible embodiment, with continued reference to fig. 4, optionally, the thickness h2 of the second electrode portion 322 is smaller than the thickness h1 of the first electrode portion 321 along the thickness direction of the display panel (as shown in the Z direction in the figure).
Specifically, the materials of the second electrode portion 322 and the first electrode portion 321 may be the same or different, so that the normal transmission of the electrical signal of the second electrode 32 is ensured, and meanwhile, the transmittance of the second electrode portion 322 for the high-angle light can be increased by reducing the thickness h1 of the second electrode portion 322, so as to play a role in equalizing the luminance attenuation of the white monochromatic RGB, and reducing the large-viewing-angle color cast.
As shown in fig. 5 and 6, optionally, the second electrode portion 322 has a mesh-like hollow structure.
Specifically, the materials of the second electrode portion 322 and the first electrode portion 321 may be the same or different, and the second electrode 32 may be patterned while ensuring normal transmission of the electrical signal of the second electrode 32, so as to increase the transmittance of the second electrode portion 322; if the second electrode part 322 is patterned into a mesh-shaped hollow structure, the mesh-shaped hollow pattern can be circular or rectangular, and the like, so that the transmittance of the second electrode part 322 for light with a large viewing angle is improved, the brightness attenuation of white monochromatic RGB is balanced and synthesized, and the color cast at the large viewing angle is reduced.
It should be noted that the aforementioned "patterning" specifically refers to a non-integral layer structure, that is, a structure formed by etching a specific shape after forming an integral layer of material in a manufacturing process, and the mesh-like hollow structure of the second electrode portion 322 is not limited to that shown in fig. 5, and more mesh-like hollow structures are not listed here one by one, so as to ensure that the electrical signal transmission of the second electrode 32 is completed.
In a possible embodiment, with continued reference to fig. 5 and 6, optionally, the first electrode portion 321 and the second electrode portion 322 comprise metal doped particles, and the doping concentration of the metal doped particles in the second electrode portion 322 is less than the doping concentration of the metal doped particles in the first electrode portion 321.
Specifically, when the first electrode portion 321 and the second electrode portion 322 both include a conductive material of metal doped particles, for example, a magnesium-silver alloy is used, and on the premise of ensuring the electrical signal transmission efficiency of the second electrode portion 322, the transmittance of the second electrode portion 322 is improved by adjusting the doping concentration of the silver metal doped particles in the second electrode portion 322. Specifically, the doping concentration of the silver metal doped particles in the second electrode portion 322 can be reduced, so that the doping concentration of the metal doped particles in the second electrode portion 322 is smaller than the doping concentration of the metal doped particles in the first electrode portion 321, and thus the transmittance of the second electrode portion 322 is higher than that of the first electrode portion 321, the purpose of improving the transmittance of the second electrode portion 322 is achieved, the luminance attenuation of white monochromatic RGB can be balanced and synthesized, and the large-viewing-angle color cast can be reduced.
FIG. 7 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention; FIG. 8 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention; fig. 9 is a schematic cross-sectional structure diagram of another display panel according to an embodiment of the present invention. As shown in fig. 2-4 and 7-9, alternatively, the first electrode portion 321 and the second electrode portion 322 are both parallel to the plane of the substrate base plate 201, and the second electrode portion 322 is located on the side of the first electrode portion 321 away from the substrate base plate 201; the second electrode 32 further comprises a third electrode portion 323 connecting the first electrode portion 321 and the second electrode portion 322; the transmittance of at least part of the third electrode portions 323 is the same as the transmittance of the first electrode portions 321, as shown in fig. 2, 7, and 8; alternatively, the transmittance of at least part of the third electrode portions 323 is the same as the transmittance of the second electrode portions 322, as shown in fig. 3 and 7; alternatively, the transmittance of the third electrode portions 323 changes gradually in the thickness direction of the display panel (as shown in the Z direction in the figure), and the transmittance of the third electrode portions 323 on the side closer to the first electrode portions 321 is higher than the transmittance of the third electrode portions 323 on the side closer to the second electrode portions 322, as shown in fig. 9.
Specifically, the second electrode 32 further includes a third electrode portion 323 connecting the first electrode portion 321 and the second electrode portion 322, and in one possible embodiment, the first electrode portion 321 covers the light-emitting layer 33, the third electrode portion 323 may cover all the side walls of the pixel opening corresponding to the light-emitting unit 30, the third electrode portion 323 is integrally provided with the first electrode portion 321, and the transmittance of the third electrode portion 323 is the same as the light transmittance of the first electrode portion 321. In the preparation, first electrode portions 321 are prepared in a whole layer, then the first electrode portions 321 on the surface of the pixel defining layer 203 between two adjacent light-emitting units 30 are patterned, and the first electrode portions 321 covering the side walls of the pixel openings form third electrode portions 323; a second electrode portion 322 is prepared in the removed area, the second electrode portion 322 being parallel to the first electrode portion 321, as shown in fig. 2.
In one possible embodiment, the first electrode portion 321 on the side wall of the pixel opening and the surface of the pixel defining layer 203 between two adjacent light emitting units 30 may be removed, and the second electrode portion 322 covering the side wall of the pixel opening forms the third electrode portion 323; a second electrode portion 322 is prepared at the removed area, and the second electrode portion 322 positioned at the surface of the pixel defining layer 203 is parallel to the first electrode portion 321, as shown in fig. 3.
In one possible embodiment, the first electrode portion 321 on the surface of the pixel defining layer 203 between two adjacent light emitting units 30 and a part of the sidewall of the pixel opening may be patterned, and the first electrode portion 321 of the region forms the third electrode portion 323; a second electrode portion 322 is prepared in the removed area, a portion of the second electrode portion 322 covers the sidewall of the pixel opening, and a portion of the second electrode portion 322 is parallel to the first electrode portion 321, as shown in fig. 7.
In one possible embodiment, the first electrode portion 321 on a partial surface of the pixel defining layer 203 between two adjacent light emitting units 30 may be patterned, and the first electrode portion 321 covering the sidewall of the pixel opening forms the third electrode portion 323; a second electrode portion 322 is prepared in the removed area, the second electrode portion 322 being parallel to the first electrode portion 321, as shown in fig. 8.
In one possible embodiment, the sidewalls of the pixel opening and the first electrode portion 321 on the surface of the pixel defining layer 203 between two adjacent light emitting units 30 may be patterned in preparation; preparing a third electrode part 323 with gradually changed refractive index on the side wall of the pixel opening along the thickness direction of the display panel (such as the Z direction in the figure), for example, adjusting the doping concentration of metal doping particles, the thickness or the material of the third electrode part 323, and the like, so that the transmittance of the third electrode part 323 at the side close to the first electrode part 321 is larger than that of the third electrode part 323 at the side close to the second electrode part 322; second electrode portions 322 connected to the third electrode portions 323 and parallel to the first electrode portions 321 are further prepared, as shown in fig. 9. The transmittance of the second electrode 32 from the first electrode part 321 to the third electrode part 323 to the second electrode part 322 is gradually reduced, and is matched with the large-angle line-of-sight attenuation increase of the light-emitting unit 30, so that the transmittance of the large-angle light can be gradually improved along the divergence direction of the light, the brightness attenuation of the white monochromatic RGB is balanced, and the large-angle color cast is reduced.
FIG. 10 is a schematic diagram of a surface structure of another display panel according to an embodiment of the present invention; FIG. 11 is a schematic cross-sectional view of the display panel of FIG. 9 along direction BB'; fig. 12 is a schematic cross-sectional structure of the display panel along the direction BB' in fig. 9. Based on the above embodiments, as shown in fig. 10 to 12, optionally, the display panel includes a first display area A1 and a second display area A2, and the second display area A2 is reused as the light sensing element arrangement area; the light emitting unit 30 includes a first light emitting unit 4 positioned in the first display area A1 and a second light emitting unit 5 positioned in the second display area A2; the first light emitting unit 4 includes a second electrode 42, and the second light emitting unit 5 includes a second electrode 52; wherein, the average light transmittance of the second electrode 52 is greater than the average light transmittance of the second electrode 41.
Specifically, the first display area A1 is used for normally displaying a picture; the multiplexing of second display area A2 sets up the district for the light sense component, can set up the light sense device, for example sets up image sensor, fingerprint sensor etc. and outside light gets into display panel's inside through second display area A2 to realize the light reception of devices such as image sensor, fingerprint sensor. The first display area A1 and the second display area A2 are both provided with the light emitting element 30, and in a possible embodiment, the average light transmittance of the second electrode 42 of the first light emitting unit 4 in the first display area A1 may be set to be greater than the average light transmittance of the second electrode 52 of the second light emitting unit 5 in the second display area A2, the second electrode 42 is the cathode of the first light emitting unit 4, and the second electrode 52 is the cathode of the second light emitting unit 5, so that the light emitting rate of the second light emitting unit 5 may be increased, the overall light transmittance of the cathode electrode in the light sensing element setting area may be increased, and the performance of the light sensing device may be improved.
Wherein the first light emitting unit 4 further includes a first electrode 41 and a first light emitting layer 43 between the first electrode 41 and the second electrode 42; the second light emitting unit 4 further includes a first second electrode 51 and a first second light emitting layer 53 between the first second electrode 51 and the second electrode 52. It should be noted that fig. 10 only exemplarily shows some of the first light-emitting units 4 and the second light-emitting units 5, and more of the first light-emitting units 4 and the second light-emitting units 5 are not shown one by one.
On the basis of the above embodiment, as shown in fig. 10 and 11, optionally, the second electrode 42 includes a first electrode part 421 and a second electrode part 422, and the second electrode 52 includes a first electrode part 521 and a second electrode part 522; the light transmittance of the first electrode portion 521 is greater than that of the first electrode portion 421, and/or the light transmittance of the second electrode portion 522 is greater than that of the second electrode portion 422.
One feasible way is that, as shown in fig. 11, the light transmittance of the first electrode portion 421 is t1, the light transmittance of the second electrode portion 422 is t2, the light transmittance of the first electrode portion 521 is t3, and the light transmittance of the second electrode portion 522 is t4, and the conductive materials of the second electrode 42 and the second electrode 52 may be reasonably selected or the structures thereof are designed to be hollow, so that the following requirements are met: t2 is more than t1, t4 is more than t3, and under the precondition, t3 is more than t1; and/or, t4 > t2. By setting the light transmittance t3 of the first electrode part 521 to be greater than the light transmittance t1 of the first electrode part 421, and/or setting the light transmittance t4 of the second electrode part 522 to be greater than the light transmittance t2 of the second electrode part 422, and combining the analysis of the above embodiment, the large-viewing-angle color cast of the first light-emitting unit 4 and the second light-emitting unit 5 can be respectively reduced, and the light-emitting rate of the second light-emitting unit 5 can be further improved, so that the light-emitting luminance of the first display area A1 and the light-emitting luminance of the second display area A2 are balanced, and the display effect of the display screen is ensured.
In one possible embodiment, as shown in fig. 10 and 12, the second electrode 42 includes a first electrode portion 421 and a second electrode portion 422, and the second electrode 52 includes a first electrode portion 521 and a second electrode portion 522; the coverage area of the first electrode part 521 is smaller than that of the first electrode part 421; and/or the coverage area of the second ethyl electrode part 522 is larger than that of the second methyl electrode part 422.
Specifically, in order to increase the light transmittance of the light sensing element installation region, the light emitting area of the second light emitting unit 5 in the light sensing element installation region may be compressed. In the direction Z in the figure, under the condition that the second light-emitting unit 5 is ensured to emit light normally, the coverage area of the first electrode part 521 of the second light-emitting unit 5 can be set smaller than the coverage area of the first electrode part 421 of the first light-emitting unit 4, so that the light transmittance of the first electrode part 521 is improved, and the purpose of improving the performance of the light-sensitive device is achieved; and/or the coverage area of the second electrode part 522 of the second light-emitting unit 5 is larger than that of the second electrode part 422 of the first light-emitting unit 4, so as to further improve the emergence rate of the light with large viewing angle of the second light-emitting unit 5 in the light sensation element arrangement area. Through the structural design, the large visual angle color cast of the second light-emitting unit 5 can be reduced, meanwhile, the light-emitting brightness of the first display area A1 and the second display area A2 is balanced, and the display effect of the display picture is ensured.
Based on the same inventive concept, the embodiment of the invention also provides a display device. Fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 13, the display device includes any one of the display panels provided in the foregoing embodiments. Illustratively, as shown in fig. 13, the display device 300 includes a display panel 200. Therefore, the display device also has the advantages of the display panel in the above embodiments, and the same points can be understood by referring to the above explanation of the display panel, which is not repeated herein.
The display device 300 provided in the embodiment of the present invention may be a mobile phone as shown in fig. 13, and may also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, industrial control equipment, a medical display screen, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be 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 changes, rearrangements 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 some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (11)
1. The display panel is characterized by comprising a substrate base plate and a plurality of light-emitting units positioned on one side of the substrate base plate, wherein each light-emitting unit comprises a first electrode and a second electrode, and the second electrode is positioned on one side of the first electrode, which is far away from the substrate base plate;
the second electrode comprises a first electrode part and a second electrode part which are electrically connected with each other, the first electrode part and the first electrode are at least partially overlapped, and the second electrode part and the first electrode are at most partially overlapped along the thickness direction of the display panel;
wherein the transmittance of the second electrode portion is greater than the transmittance of the first electrode portion.
2. The display panel according to claim 1, wherein the first electrode portion and the second electrode portion are different in material.
3. The display panel according to claim 1, wherein a thickness of the second electrode portion is smaller than a thickness of the first electrode portion in a thickness direction of the display panel.
4. The display panel according to claim 1, wherein the second electrode portion has a mesh-like hollow structure.
5. The display panel according to any one of claims 2 to 4, wherein a material of the first electrode portion comprises a metal alloy, and a material of the second electrode portion comprises indium tin oxide.
6. The display panel according to claim 1, wherein the first electrode portion and the second electrode portion include metal-doped particles,
the doping concentration of the metal doping particles in the second electrode part is smaller than that of the metal doping particles in the first electrode part.
7. The display panel according to claim 1, wherein the first electrode portion and the second electrode portion are both parallel to a plane in which the substrate base plate is located, and the second electrode portion is located on a side of the first electrode portion away from the substrate base plate;
the second electrode further comprises a third electrode portion connecting the first electrode portion and the second electrode portion;
the transmittance of at least part of the third electrode portions is the same as the light transmittance of the first electrode portions;
or the transmittance of at least part of the third electrode part is the same as the transmittance of the second electrode part;
alternatively, the transmittance of the third electrode portion changes gradually in the thickness direction of the display panel, and the transmittance of the third electrode portion on the side close to the first electrode portion is higher than the transmittance of the third electrode portion on the side close to the second electrode portion.
8. The display panel according to claim 1, wherein the display panel comprises a first display region and a second display region, the second display region being multiplexed into a light-sensing element arrangement region;
the light emitting unit comprises a first light emitting unit positioned in the first display area and a second light emitting unit positioned in the second display area; the first light emitting unit comprises a second electrode, and the second light emitting unit comprises a second electrode;
wherein the average light transmittance of the second electrode is greater than the average light transmittance of the second electrode.
9. The display panel according to claim 8, wherein the second electrode comprises a first electrode portion and a second electrode portion, and the second electrode comprises a first electrode portion and a second electrode portion;
the light transmittance of the first ethyl electrode part is greater than that of the first methyl electrode part, and/or the light transmittance of the second ethyl electrode part is greater than that of the second methyl electrode part.
10. The display panel according to claim 8, wherein the second electrode comprises a first electrode portion and a second electrode portion, and the second electrode comprises a first electrode portion and a second electrode portion;
the coverage area of the first ethyl electrode part is smaller than that of the first methyl electrode part, and/or the coverage area of the second ethyl electrode part is larger than that of the second methyl electrode part.
11. A display device comprising the display panel according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210910627.5A CN115275059A (en) | 2022-07-29 | 2022-07-29 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210910627.5A CN115275059A (en) | 2022-07-29 | 2022-07-29 | Display panel and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115275059A true CN115275059A (en) | 2022-11-01 |
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ID=83747561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210910627.5A Pending CN115275059A (en) | 2022-07-29 | 2022-07-29 | Display panel and display device |
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| Country | Link |
|---|---|
| CN (1) | CN115275059A (en) |
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2022
- 2022-07-29 CN CN202210910627.5A patent/CN115275059A/en active Pending
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