CN113130616B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN113130616B CN113130616B CN202110423377.8A CN202110423377A CN113130616B CN 113130616 B CN113130616 B CN 113130616B CN 202110423377 A CN202110423377 A CN 202110423377A CN 113130616 B CN113130616 B CN 113130616B
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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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- 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
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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
- H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
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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
- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
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Abstract
The application provides a display panel, including: a substrate; a light emitting device layer including at least one light emitting device; the first optical structure layer comprises at least one first opening, and the projection of the light-emitting device on the first optical structure layer is positioned in the first opening; the second optical structure layer is positioned on the surface of one side, far away from the substrate, of the first optical structure layer, and the refractive index of the second optical structure layer is larger than that of the first optical structure layer; the side wall of the first opening comprises at least one convex part and/or concave part, the convex parts or concave parts are in concave-convex change along a first direction and are arranged along a second direction, the first direction is perpendicular to the side wall of the first opening, and the second direction is perpendicular to the first direction and is parallel to the plane of the substrate. The display panel that this application embodiment provided sets up to concave-convex structure through the lateral wall with first open-ended, can increase the light-emitting area when light exits from optical structure layer, and the light-emitting luminance of increase normal viewing angle light promotes display panel's light-emitting effect.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the rapid development of terminal devices, higher requirements are put on the display of the terminal devices. The current display technology field is mainly divided into Liquid Crystal Display (LCD) and Organic Light Emitting Display (OLED). The organic light emitting display is based on the fact that electrons and holes of organic materials are recombined to emit light rays to realize display of different colors. The organic light emitting device is a self-luminous device, and has the advantages of high response speed, high brightness, wide viewing angle, low power consumption and the like.
In the current display panel, the display panel mainly includes a light emitting device layer and a light emitting layer, where the light emitting device layer includes a plurality of organic light emitting devices, and a light emitting layer is usually covered above the organic light emitting devices to emit light emitted from the organic light emitting devices, but the light emitting layer in the prior art may cause light emission loss of the organic light emitting devices.
Therefore, there is an urgent need for an organic light emitting display device capable of improving light extraction efficiency.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a display panel and a display device capable of improving light extraction efficiency.
An embodiment of the present application provides a display panel, including:
a substrate;
a light emitting device layer on one side of the substrate, including at least one light emitting device;
the first optical structure layer is positioned on one side, away from the substrate, of the light-emitting device layer and comprises at least one first opening, and the projection of the light-emitting device on the first optical structure layer is positioned in the first opening;
the second optical structure layer is positioned on the surface of one side, far away from the substrate, of the first optical structure layer, and the refractive index of the second optical structure layer is larger than that of the first optical structure layer;
the side wall of the first opening comprises at least one convex part and/or concave part, the convex part or concave part is in concave-convex change along a first direction and is arranged along a second direction, the first direction is vertical to the side wall of the first opening, and the second direction is vertical to the first direction and is parallel to the plane of the substrate.
Optionally, the protruding portion or the recessed portion extends along a third direction, and the third direction is perpendicular to the second direction and parallel to the plane of the substrate.
Optionally, an included angle formed by the side wall of the first opening and the plane of the substrate close to the central area of the first opening ranges from 40 ° to 80 °.
Optionally, the sidewall of the first opening includes a plurality of periodically distributed protrusions and depressions.
Optionally, the recess is located between two adjacent protrusions.
Optionally, an included angle formed by the protrusion portion close to the first opening center region and the plane where the substrate is located is larger than an included angle formed by the recess portion close to the first opening center region and the plane where the substrate is located.
Optionally, the sidewall of the first opening includes a plurality of protrusions or a plurality of recesses, and the plurality of protrusions or the plurality of recesses are distributed at equal intervals.
Optionally, along a first plane, a cross section of a sidewall of the first opening is stepped, the step is a protrusion or a recess, and the first plane is perpendicular to the substrate and the second direction and intersects with at least one protrusion or recess.
Optionally, in the direction away from the substrate, the included angle formed by the protrusion or the recess located at different step positions of the sidewall of the first opening, which is close to the central area of the first opening, and the plane where the substrate is located is different.
Optionally, in the direction away from the substrate, the included angle formed by the protrusion or the recess located at different step positions of the sidewall of the first opening, which is close to the central area of the first opening, and the plane where the substrate is located is gradually increased.
Optionally, the light emitting device layer includes a first color light emitting device, a second color light emitting device, and a third color light emitting device, the first color light emitting device has a center wavelength λ 1, the second color light emitting device has a center wavelength λ 2, and the third color light emitting device has a center wavelength λ 3, where λ 1 > λ 2 > λ 3;
the first opening includes a first sub-opening corresponding to the first color light emitting device, a second sub-opening corresponding to the second color light emitting device, and a third sub-opening corresponding to the third color light emitting device, wherein,
the number of the convex parts and the concave parts in the first sub-opening is X 1 The number of the convex parts and the concave parts in the second sub-opening is X 2 The number of the convex portions and the concave portions in the third sub-opening is X 3 Wherein X is 3 >X 2 >X 1 。
Optionally, a projection of the first opening on the substrate is a rectangle, the rectangle includes a first side and a second side, a size of the first side is larger than a size of the second side, and a number of the convex portions and the concave portions corresponding to the first side is Y 1 The number of the convex parts and the concave parts corresponding to the second edge is Y 2 Wherein Y is 2 >Y 1 。
Optionally, the method further includes: and the packaging layer comprises a first inorganic packaging layer, an organic packaging layer and a second inorganic packaging layer, the first inorganic packaging layer is used for multiplexing the first optical structure layer, and the organic packaging layer is used for multiplexing the second optical structure layer.
Optionally, the method further includes: and the touch layer multiplexes the first optical structure layer and the second optical structure layer.
Optionally, the method further includes: a polarizing layer multiplexing the first optical structure layer and the second optical structure layer.
The embodiment of the application provides a display device, and the display device comprises the display panel of any one of the above embodiments.
The display panel that this application embodiment provided includes: a substrate; a light emitting device layer on one side of the substrate, including at least one light emitting device; the first optical structure layer is positioned on one side, far away from the substrate, of the light-emitting device layer and comprises at least one first opening, and the projection of the light-emitting device on the first optical structure layer is positioned in the first opening; the second optical structure layer is positioned on the surface of one side, far away from the substrate, of the first optical structure layer, and the refractive index of the second optical structure layer is larger than that of the first optical structure layer; the side wall of the first opening comprises at least one convex part and/or concave part, the convex parts or concave parts are in concave-convex change along a first direction and are arranged along a second direction, the first direction is perpendicular to the side wall of the first opening, and the second direction is perpendicular to the first direction and is parallel to the plane of the substrate.
The display panel that this application embodiment provided sets up to concave-convex structure through the lateral wall with first open-ended, can increase the light-emitting area when light exits from optical structure layer, and the light-emitting luminance of increase normal viewing angle light promotes display panel's light-emitting effect.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following descriptions are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a cross-sectional structural diagram of a display panel according to an embodiment of the present disclosure;
fig. 2 and fig. 3 are cross-sectional structural diagrams of another display panel provided in an embodiment of the present application, respectively;
fig. 4 is a top view of a pixel definition layer according to an embodiment of the present disclosure;
FIG. 5 is a partial enlarged view of the pixel definition layer provided in FIG. 4;
FIG. 6 is another enlarged partial view of the pixel definition layer provided in FIG. 4;
FIG. 7 is a schematic view of a first opening according to an embodiment of the present disclosure;
FIG. 8 is a schematic view of a sidewall of a first opening provided in accordance with an embodiment of the present disclosure;
FIG. 9 is a top view of the first opening sidewall provided in FIG. 8 taken along direction CC;
FIG. 10 is a cross-sectional view of the first opening sidewall provided in FIG. 8, taken along the direction CC;
fig. 11 to 13 are cross-sectional structural views of another display panel provided in an embodiment of the present application;
fig. 14 to 15 are cross-sectional structural views of another display panel provided in an embodiment of the present application;
fig. 16 is a schematic plan view illustrating a display device according to an embodiment of the present disclosure.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be appreciated by those skilled in the art that the present application may be practiced without departing from the spirit and scope of the present application, and that the present application is not limited to the specific embodiments disclosed below.
Next, the present application will be described in detail with reference to the drawings, and in the detailed description of the embodiments of the present application, the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration, and the drawings are only examples, which should not limit the scope of the protection of the present application. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Currently, with the rapid development of terminal devices, higher requirements are put on the display of the terminal devices. The current display technology field is mainly divided into Liquid Crystal Display (LCD) and Organic Light Emitting Display (OLED). The organic light emitting display is based on the fact that electrons and holes of organic materials are recombined to emit light rays to realize display of different colors. The organic light emitting device is a self-luminous device, and has the advantages of high response speed, high brightness, wide viewing angle, low power consumption and the like.
In the current display panel, the display panel mainly includes a light emitting device layer and a light emitting layer, where the light emitting device layer includes a plurality of organic light emitting devices, and a light emitting layer is usually covered above the organic light emitting devices to emit light emitted from the organic light emitting devices, but the light emitting layer in the prior art may cause light emission loss of the organic light emitting devices.
Therefore, there is an urgent need for a display panel and a display device capable of improving light extraction efficiency.
Based on this, the present application provides a display panel, including: a substrate; a light emitting device layer on one side of the substrate, including at least one light emitting device; the first optical structure layer is positioned on one side, away from the substrate, of the light-emitting device layer and comprises at least one first opening, and the projection of the light-emitting device on the first optical structure layer is positioned in the first opening; the second optical structure layer is positioned on the surface of one side, far away from the substrate, of the first optical structure layer, and the refractive index of the second optical structure layer is larger than that of the first optical structure layer; the side wall of the first opening comprises at least one convex part and/or concave part, the convex part or concave part is in concave-convex change along a first direction and is arranged along a second direction, the first direction is vertical to the side wall of the first opening, and the second direction is vertical to the first direction and is parallel to the plane of the substrate.
The display panel that this application embodiment provided sets up to concave-convex structure through the lateral wall with first open-ended, can increase the light-emitting area when light exits from optical structure layer, and the light-emitting luminance of increase normal viewing angle light promotes display panel's light-emitting effect.
For a better understanding of the technical solutions and effects of the present application, specific embodiments will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, a cross-sectional structure diagram of a display panel 100 provided in an embodiment of the present application is shown, where the display panel 100 includes: a substrate 110, a light emitting device layer, a first optical structure layer 130, and a second optical structure layer 140. The light emitting device layer is positioned at one side of the substrate 110, and the light emitting device layer includes at least one light emitting device 120. The light emitting device 120 may include a plurality of light emitting devices capable of emitting light of different colors. For example, the light emitting device 120 may include a red light emitting device capable of emitting red light, a green light emitting device capable of emitting green light, and a blue light emitting device capable of emitting blue light. For example, the embodiment of the invention may select an Organic Light Emitting Diode (OLED) to prepare each of the Light Emitting devices. Alternatively, in the embodiment of the present invention, the Light Emitting unit may be a Micro Light Emitting Diode (Micro-LED) or a Quantum dot Light Emitting Diode (Quantum Light Emitting Diode (QLED)).
The first optical structure layer 130 is located on a side of the light emitting device layer away from the substrate 110, that is, the first optical structure layer 130 is located above the light emitting device layer, the first optical structure layer 130 includes at least one first opening 131, and a projection of the light emitting device 120 on the first optical structure layer 130 is located in the first opening 131, that is, the first opening 131 exposes the light emitting device 120 corresponding to the first opening 131. The second optical structure layer 140 is located on a side surface of the first optical structure layer 130 away from the substrate, that is, the second optical structure layer 140 is above the first optical structure layer 130, the second optical structure layer 140 is in contact with the first optical structure layer 130, and the second optical structure layer 140 covers the first optical structure layer 130, optionally, the second optical structure layer 140 may fill the first opening 131.
In the embodiment of the present application, the refractive index of the second optical structure layer 140 is greater than that of the first optical structure layer 130, so that the light emitted from the light emitting device 120 continues to exit through the second optical structure layer 140 after being refracted by the first optical structure layer 130. The refractive index of the first optical structure layer 130 may range from 1.3 to 1.6, and the refractive index of the second optical structure layer 140 may range from 1.6 to 1.8. The refractive index difference between the first optical structure layer 130 and the second optical structure layer 140 may be 0.3-0.4, if the refractive index of the first optical structure layer 130 is too low, the refractive index difference between the first optical structure layer 130 and the film layer covered by the first optical structure layer 130 is too large, which causes too high reflection loss of the light emitted from the light emitting device 120 at the interface where the first optical structure layer 130 and the lower film layer are in contact, and is not favorable for light emission, and if the refractive index of the second optical structure layer 140 is too high, when the second optical structure layer 140 emits the light, the reflection loss at the exit interface of the second optical structure layer 140 is too high, and is not favorable for light emission. The material of the second optical structure layer 140 may be acrylic, for example, an epoxy-based material mixed with metal oxide nanoparticles having a high refractive index, and the metal oxide nanoparticles may be zirconium oxide (ZrO) 2 ) Or titanium oxide (TiO) 2 )。
In the embodiment of the present application, the sidewall of the first opening 131 and the upper surface of the first opening 131 may form a bevel, and referring to the sectional structure diagram of the display panel shown in fig. 1, the sectional view of the first opening 131 may be a trapezoid. The sidewalls of the first opening 131 and the upper surface of the first opening 131 may also be rounded based on practical process limitations.
In an embodiment of the present application, referring to fig. 1, when the sidewall of the first opening 131 and the upper surface of the first opening 131 form a bevel, an included angle formed by the sidewall of the first opening 131 near the central region of the first opening 131 and the plane of the substrate 110 is a bevel angle θ, and the bevel angle θ may range from 40 ° to 80 °. The slope angles described below in the embodiments of the present application are all described by forming a bevel angle between the sidewall of the first opening 131 and the upper surface of the first opening 131, that is, the slope angles in the embodiments of the present application include an included angle formed between the sidewall of the first opening 131 near the central region of the first opening 131 and the plane of the substrate 110 when the sidewall of the first opening 131 and the upper surface of the first opening 131 form a bevel angle.
In practical applications, the display panel 100 may further include a pixel defining layer 150, as shown in fig. 1, 4, 5 and 6, where fig. 4 is a top view of the pixel defining layer 150 provided in this embodiment of the application, fig. 5 and 6 are partial enlarged views of the pixel defining layer 150, a cross-sectional structure diagram of the display panel shown in fig. 1 may be obtained along an AA direction shown in fig. 4, 5 or 6, and a rectangle shown in fig. 5 or 6 and having a size of C4 represents a projection of a line when a sidewall of the first opening 131 intersects with an upper surface of the first opening 131 on the pixel defining layer 150. The pixel defining layer 150 has a plurality of pixel openings 151, and the size of the pixel openings 151 may be C1, and the size of the pixel openings 151 is not limited in the embodiment of the present application and may be designed according to actual situations. The pixel opening 151 exposes the light emitting devices 120 corresponding to the pixel opening 151, i.e., the light emitting devices 120 and the pixel opening 151 may correspond one to one, and the light emitting devices 120 may include a plurality of colors, e.g., a red light emitting device, a green light emitting device, and a blue light emitting device.
In practical applications, the shape of the first opening 131 may vary according to the shape of the pixel opening 151. As a possible implementation manner, the projections of the first opening 131 and the pixel opening 151 on the substrate coincide, and referring to fig. 1, the sizes of the pixel opening 151 and the first opening 131 may be C1, and based on the practical process limit, the projection distances of the first opening 131 and the pixel opening 151 on the substrate are within 0.5 μm, which may be considered as projection coincidence.
As an example, the pixel opening 151 may be rectangular, the first opening 131 may also be rectangular, and the projections of the first opening 131 and the pixel opening 151 on the substrate coincide. The pixel opening 151 and the first opening 131 may not be completely rectangular, but may be rounded rectangular, depending on practical process limitations.
Referring to fig. 2 and 3, in the embodiment of the present disclosure, the sidewall of the first opening 131 includes at least one protrusion 1311 and/or one depression 1312, and the protrusion 1311 or the depression 1312 is varied in a concave-convex manner along a first direction perpendicular to the sidewall of the first opening 131 and arranged along a second direction perpendicular to the first direction and parallel to the plane of the substrate 110.
Referring to fig. 2 and 5, the first direction is perpendicular to the sidewall of the first opening 131, and when the sidewall of the first opening 131 is the protrusion 1311, as can be seen from fig. 5, the size of the first opening 131 is C2, which is smaller than the size C1 of the pixel opening 151.
Referring to fig. 3 and 5, when the sidewall of the first opening 131 is the recess 1312, as shown in fig. 5, the first opening 131 has a size C3 greater than a size C1 of the pixel opening 151.
That is, when the sidewall of the first opening 131 is the protrusion 1311, the projection of the first opening 131 on the substrate 110 is smaller than when the sidewall of the first opening 131 is the recess 1312, i.e., the opening size of the sidewall of the first opening 131 is the protrusion 1311 is smaller than that of the sidewall of the first opening 131 is the recess 1312.
Referring to fig. 7 and 8, fig. 7 is a schematic view of a first opening 131 under an electron microscope according to an embodiment of the present disclosure, and fig. 8 is a schematic view of a sidewall of the first opening 131 according to an embodiment of the present disclosure. It can be seen from fig. 8 that the present embodiment provides a rounded rectangular shape of the first opening 131, and the sidewall of the first opening 131 includes at least one protrusion 1311 and a depression 1312. A cross-sectional view of the first opening 131 in the BB direction in fig. 8 is a cross-sectional shape of a sidewall of the first opening 131 in fig. 1. As shown in fig. 8, the first opening 131 has a rounded rectangular shape, wherein the first direction is perpendicular to a sidewall of the first opening 131, and the second direction is perpendicular to the first direction and parallel to a plane of the substrate, i.e. the second direction is a direction of any edge of the first opening 131. When the sidewalls of the first opening 131 are the protruding portions 1311 or the recessed portions 1312, the protruding portions 1311 or the recessed portions 1312 are arranged along the second direction, that is, the sidewalls of any side of the first opening 131 include at least one protruding portion 1311 or one recessed portion 1312, so as to increase the light emitting area when the light exits from the optical structure layer, increase the light emitting brightness of the light, and improve the light emitting effect of the display panel.
In an embodiment of the present application, the protrusion 1311 or the recess 1312 included in the sidewall of the first opening 131 may extend along a third direction, which is perpendicular to the second direction and parallel to the plane of the substrate 110. Referring to fig. 1, the third direction is a direction perpendicular to one side of the first opening 131, and the third direction is parallel to the substrate 110. The protrusion 1311 or the recess 1312 extends in the third direction, which means that the protrusion 1311 or the recess 1312 penetrates through the entire sidewall of the first opening 131 in the third direction, so that the slope angle of each protrusion 1311 is the same or the slope angle of each recess 1312 is the same, thereby ensuring the uniformity of light emission.
Referring to fig. 9 and 10, fig. 9 is a top view of the sidewall of the first opening 131 provided in fig. 8 along the CC direction, and fig. 10 is a cross-sectional view of the sidewall of the first opening 131 provided in fig. 8 along the CC direction, where an included angle formed after the CC direction intersects with the substrate 110 is θ, that is, the CC direction is parallel to the sidewall of the first opening 131. As can be seen from fig. 9, the sidewall of the first opening 131 may include a plurality of protrusions 1311 and recesses 1312 distributed periodically, that is, the protrusions 1311 and the recesses 1312 are repeatedly distributed on the sidewall of the first opening 131, so as to improve uniformity of the outgoing light in all directions. Meanwhile, the protrusion 1311 and the recess 1312 are disposed on the side wall of the first opening 131, so that the surface area of the side wall of the first opening 131 can be increased, the light emitting area of light emitted from the optical structure layer can be increased, the light emitting brightness of light can be increased, and the light emitting effect of the display panel can be improved.
As a possible implementation manner, referring to fig. 9 and 10, the recesses 1312 are located between two adjacent protrusions 1311, and the protrusions 1311 are located between two adjacent recesses 1312, that is, the protrusions 1311 and the recesses 1312 are alternately distributed on the sidewalls of the first opening 131.
In practical applications, when the light emitting area is increased by the recesses 1312 and the protrusions 1311, the projections of the recesses 1312 and the protrusions 1311 on the substrate 110 may not coincide with the projections of the pixel openings 151 on the substrate 110. The projection of the protrusion 1311 on the substrate 110 may fall within the pixel opening 151, i.e. the projection of the protrusion 1311 on the substrate 110 may be close to the central area of the projection of the pixel opening 151 on the substrate; a projection of the recess 1312 on the substrate 110 may be located outside the pixel opening 151, i.e., the projection of the recess 1312 on the substrate 110 may be far from a central region of the projection of the pixel opening 151 on the substrate. The closer the projection of the recess 1312 or the protrusion 1311 on the substrate 110 and the projection of the pixel opening 151 on the substrate 110 are, the greater the luminance improvement at the front viewing angle.
As an example, the projection of the protrusion 1311 on the substrate 110 may fall within the pixel opening 151 by 3 micrometers, and as shown with reference to fig. 2, the size of the first opening 131 is smaller than the size of the pixel opening 151.
As another example, the projection of the recess 1312 on the substrate 110 may be located 2 microns outside the pixel opening 151, and referring to fig. 3, the size of the first opening 131 is larger than that of the pixel opening 151.
In practical applications, when the sidewall of the first opening 131 includes a plurality of periodically distributed protrusions 1311 and recesses 1312, the slope angle of the protrusions 1311 may be greater than that of the recesses 1312. For example, the slope angles of the protrusion 1311 and the depression 1312 may range from 40 ° to 60 °, with the slope angle of the protrusion 1311 being greater than the slope angle of the depression 1312. For another example, the slope angles of the protrusion 1311 and the depression 1312 may range from 60 ° to 80 °, and the slope angle of the protrusion 1311 is greater than the slope angle of the depression 1312.
In the embodiment of the present application, the sidewall of the first opening 131 may include a plurality of protruding portions 1311 or a plurality of recessed portions 1312, that is, the sidewall of the first opening 131 may include only the plurality of protruding portions 1311, or only the plurality of recessed portions 1312, so as to increase the light output area and improve the light output brightness. The protrusions 1311 and the recesses 1312 are distributed at equal intervals, so that light emitted in all directions can be uniform. In an embodiment of the present application, as shown with reference to fig. 10 to 12, along the first plane, a cross section of a sidewall of the first opening 131 may be stepped, and the step may be a protrusion 1311 or a recess 1312. The first plane is perpendicular to the substrate 110 and the second direction, i.e. the first plane is parallel to the third direction. The first plane intersects at least one of the protrusions 1311 or the depressions 1312. That is, the protrusions 1311 or the recesses 1312 may be provided at a plurality of stages on the sidewall of the first opening 131 so as to further increase the surface area of the sidewall of the first opening 131.
In practical applications, the slope angles of the protruding portions 1311 or the recessed portions 1312 located at different step positions of the sidewalls of the first opening 131 are different in a direction away from the substrate 110. As a possible implementation manner, the slope angle of the protrusion 1311 or the recess 1312 located at different step positions of the sidewall of the first opening 131 gradually increases in a direction away from the substrate 110, that is, θ 2 Greater than theta 1 So that the protrusion 1311 or the recess 1312 in the direction away from the substrate improves the light emitting effect and increases the light emitting brightness.
As an example, referring to a cross-sectional structure view of the display panel shown in fig. 11, the sidewall of the first opening 131 has two steps: a first step 1301 and a second step 1302, wherein the step close to the substrate 110 is the first step 1301, and the step far from the substrate 110 is the second step 1302. The first step 1301 may include a plurality of protrusions 1311 or a plurality of recesses 1312, and an inclination angle of the plurality of protrusions 1311 or the plurality of recesses 1312 may range from 40 ° to 60 °, and mainly refracts light emitted from the light emitting device, and the refraction range is close to the pixel opening 151. The second step 1302 may also include a plurality of protrusions 1311 or a plurality of recesses 1312, and the slope angle of the plurality of protrusions 1311 or the plurality of recesses 1312 may range from 60 ° to 80 °, and mainly reflects light emitted from the light emitting device, and the reflective range is far away from the pixel opening 151.
The present embodiment does not specifically define the shape of the sidewall of the first opening 131 that the first step 1301 and the second step 1302 have as the protrusion 1311 or the depression 1312.
As an example, referring to a cross-sectional structure view of the display panel shown in fig. 12, the first step 1301 may include a plurality of protrusions 1311, and the second step 1302 may include a plurality of recesses 1312.
As still another example, referring to a cross-sectional structure diagram of the display panel shown in fig. 13, the first step 1301 may include a plurality of recesses 1312, and the second step 1302 may also include a plurality of recesses 1312.
In an embodiment of the present application, a projection of the first opening 131 on the substrate 110 may be a rectangle, and the rectangle includes a first side and a second side, where a size of the first side is larger than a size of the second side, that is, the first side is a long side and the second side is a short side. The long and short sides of the first opening 131 may include different numbers of the protrusions 1311 and the plurality of the depressions 1312.
As an example, the total number of protrusions 1311 and depressions 1312 corresponding to the first edge is Y 1 The number of the protrusions 1311 and the depressions 1312 corresponding to the second side is Y 2 ，Y 2 >Y 1 That is, the total number of the convex portions 1311 and the concave portions 1312 on the long side is less than the total number of the convex portions 1311 and the concave portions 1312 on the short side, so that the light emitted from each side of the first opening 131 is ensured to be uniform, and the problem of color shift of different viewing angles caused by different sizes of the sides of the first opening can be solved.
In an embodiment of the present application, the light emitting device 120 may include light emitting sub-devices of a plurality of colors to meet the display requirements of the display panel. The light emitting device layer may include a first color light emitting device having a center wavelength λ 1, a second color light emitting device having a center wavelength λ 2, and a third color light emitting device having a center wavelength λ 3, wherein λ 1 > λ 2 > λ 3. For example, the first color light emitting device may be a red light emitting device, the second color light emitting device may be a green light emitting device, and the third color light emitting device may be a blue light emitting device. Each of the light emitting devices may correspond to one of the pixel opening 151 and the first opening 131, i.e., the first opening 131 may include a first sub-opening corresponding to a first color light emitting device, a second sub-opening corresponding to a second color light emitting device, and a third sub-opening corresponding to a third color light emitting device.
In practical applications, since the light emitting devices of different colors have different light emitting efficiencies, in order to improve the light emitting effect of the light emitting device with lower light emitting efficiency, a greater number of the protruding portions 1311 and the recessed portions 1312 may be disposed on the sidewall of the first opening 131 corresponding to the light emitting device with lower light emitting efficiency. For example, since the efficiency of the blue light emitting device is low, a greater number of the protrusions 1311 and the depressions 1312 may be provided on the first openings 131 corresponding to the blue light emitting device.
As a possible implementation, the number of the convex portions and the concave portions in the first sub-opening is X 1 The number of the convex parts and the concave parts in the second sub-opening is X 2 The number of the convex parts and the concave parts in the third sub-opening is X 3 Wherein X is 3 >X 2 >X 1 . That is, the light emitting efficiency of the light emitting device of the third color corresponding to the third sub-opening is the lowest, and thus the number of the convex portions and the concave portions in the third sub-opening is the largest.
In an embodiment of the present application, as shown with reference to fig. 1, the display panel 100 may further include an encapsulation layer 160, which may be positioned between the light emitting device layer and the first optical structure layer 130, and which covers the light emitting device layer so as to protect the plurality of light emitting devices 120 included in the light emitting device layer. The encapsulation layer may include a first inorganic encapsulation layer 161, an organic encapsulation layer 162, and a second inorganic encapsulation layer 163, wherein the first inorganic encapsulation layer 161 may multiplex the first optical structure layer 130, and the organic encapsulation layer 162 may multiplex the second optical structure layer 140. That is to say, the first inorganic encapsulating layer 161 can serve as the first optical structure layer 130, and the organic encapsulating layer 162 can serve as the second optical structure layer 140, so that the light emitting effect of the display panel can be increased, the overall thickness of the display panel 100 can be reduced, and in addition, the distance from the light emitting device layer to the optical structure layer can be reduced through the multiplexing encapsulating layer, so that the light extraction efficiency is improved, the light emitting effect is further enhanced, and the light emitting brightness is improved.
In an embodiment of the present application, referring to fig. 1, the display panel 100 may further include a touch layer 170, the touch layer 170 is configured to receive a touch operation of the display panel 100 from a user, and the touch layer 170 includes a plurality of touch metal electrodes 173 for sensing a touch input. The touch layer 170 may be located between the encapsulation layer 160 and the first optical structure layer 130, and the touch layer 170 may include a first touch insulating layer 171 and a second touch insulating layer 172. Referring to fig. 14, the first touch insulating layer 171 may be reused for the first optical structure layer 130, and the second touch insulating layer 172 may be reused for the second optical structure layer 140, so that the light emitting effect of the display panel is increased, and the overall thickness of the display panel 100 is reduced.
In the embodiment of the present application, referring to fig. 1, the display panel 100 may further include a polarizing layer 180, where the polarizing layer 180 is used to reduce light reflection of the display panel 100 by ambient light, and can effectively resist interference of the ambient light on display brightness and contrast of the display panel. The polarizing layer 180 may be on the second optical structure layer 140. The polarizing layer 180 may include a color filter layer 181 and a black matrix layer 182. Referring to fig. 14 or 15, the embodiments of the present application do not limit the thickness and width of the color filter layer 181 and the black matrix layer 182, as long as the projection of the color filter layer 181 on the substrate 110 covers the projection of the light emitting device 120 on the substrate 110, and the projection of the black matrix layer 182 on the substrate 110 does not overlap with the projection of the light emitting device 120 on the substrate 110.
Referring to fig. 15, the color filter layer 181 may be multiplexed with the second optical structure layer 140, so as to increase the light extraction effect of the display panel and reduce the overall thickness of the display panel 100.
Referring to fig. 15, when the color filter layer 181 is multiplexed with the second optical structure layer 140, the first touch insulating layer 171 is multiplexed with the first optical structure layer 130, so that the overall thickness of the display panel 100 can be further reduced.
The embodiment of the present application further provides a display device, which includes the display panel described in the above embodiment.
Fig. 16 is a schematic plan view illustrating a display device according to an embodiment of the present disclosure. As can be seen from the figure, the display device 1000 includes the display panel 100, and the display panel 100 is the display panel 100 described in any of the embodiments. The display device 1000 provided in the embodiment of the present application may be other display devices with a display function, such as a mobile phone, a computer, a television, and a vehicle-mounted display device, and the embodiment of the present application is not particularly limited. The display device 1000 provided in the embodiment of the present application has the beneficial effects of the display panel 100 provided in the embodiment of the present application, and specific reference may be specifically made to the specific description of the display panel in the above embodiment, which is not repeated herein.
The display panel that this application embodiment provided includes: a substrate; a light emitting device layer on one side of the substrate, including at least one light emitting device; the first optical structure layer is positioned on one side, away from the substrate, of the light-emitting device layer and comprises at least one first opening, and the projection of the light-emitting device on the first optical structure layer is positioned in the first opening; the second optical structure layer is positioned on the surface of one side, far away from the substrate, of the first optical structure layer, and the refractive index of the second optical structure layer is larger than that of the first optical structure layer; the side wall of the first opening comprises at least one convex part and/or concave part, the convex parts or concave parts are in concave-convex change along a first direction and are arranged along a second direction, the first direction is perpendicular to the side wall of the first opening, and the second direction is perpendicular to the first direction and is parallel to the plane of the substrate.
The display panel that this application embodiment provided sets up to concave-convex structure through the lateral wall with first open-ended, can increase the light-emitting area when light exits from optical structure layer, and the light-emitting luminance of increase normal viewing angle light promotes display panel's light-emitting effect.
When introducing elements of various embodiments of the present application, the articles "a," "an," "the," and "said" are intended to mean that there are one or more of the elements. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements other than the listed elements.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise direct contact between the first and second features through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, and that three types of relationships may exist, for example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this application generally indicates that the preceding and following associated objects are in an "or" relationship.
It should be understood that although the terms first and second may be used in the embodiments of the present application to describe technical features, the technical features should not be limited to these terms, and these terms are only used to distinguish the technical features from one another. For example, the first optical structure layer may also be referred to as a second optical structure layer, and similarly, the second optical structure layer may also be referred to as a first optical structure layer without departing from the scope of the embodiments of the present application.
The foregoing is merely a preferred embodiment of the present application and, although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application. Those skilled in the art can now make numerous possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the claimed embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application are still within the protection scope of the technical solution of the present application without departing from the content of the technical solution of the present application.
Claims (16)
1. A display panel, comprising:
a substrate;
a light emitting device layer on one side of the substrate, including at least one light emitting device;
the first optical structure layer is positioned on one side, far away from the substrate, of the light-emitting device layer and comprises at least one first opening, and the projection of the light-emitting device on the first optical structure layer is positioned in the first opening;
the second optical structure layer is positioned on the surface of one side, far away from the substrate, of the first optical structure layer, and the refractive index of the second optical structure layer is larger than that of the first optical structure layer;
the side wall of the first opening comprises at least one convex part and/or concave part, the convex part or concave part is in concave-convex change along a first direction and is arranged along a second direction, the first direction is vertical to the side wall of the first opening, and the second direction is vertical to the first direction and is parallel to the plane of the substrate.
2. The display panel according to claim 1, wherein the protrusion or the recess extends along a third direction, and the third direction is perpendicular to the second direction and parallel to the plane of the substrate.
3. The display panel according to claim 2, wherein the sidewall of the first opening forms an angle with the plane of the substrate in a range of 40 ° to 80 ° near the central region of the first opening.
4. The display panel according to claim 2, wherein the sidewall of the first opening includes a plurality of periodically distributed convex portions and concave portions.
5. The display panel according to claim 4, wherein the concave portion is located between two adjacent convex portions.
6. The display panel according to claim 4 or 5, wherein an included angle formed by the protrusion portion and the plane of the substrate near the first opening center region is larger than an included angle formed by the recess portion and the plane of the substrate near the first opening center region.
7. The display panel according to claim 2, wherein the sidewall of the first opening comprises a plurality of protrusions or a plurality of recesses, and the plurality of protrusions or the plurality of recesses are distributed at equal intervals.
8. The display panel according to claim 2, wherein a cross section of a sidewall of the first opening is stepped along a first plane, the step is a convex portion or a concave portion, and the first plane is perpendicular to the substrate and the second direction and intersects with at least one of the convex portion or the concave portion.
9. The display panel according to claim 8, wherein along a direction away from the substrate, the convex portions or the concave portions at different step positions on the side walls of the first opening form different included angles with the plane of the substrate near the central region of the first opening.
10. The display panel according to claim 9, wherein the convex portions or the concave portions located at different step positions on the sidewall of the first opening gradually increase an included angle formed by the central region of the first opening and the plane of the substrate along the direction away from the substrate.
11. The display panel of claim 2, wherein the light emitting device layer comprises a first color light emitting device having a center wavelength λ 1, a second color light emitting device having a center wavelength λ 2, and a third color light emitting device having a center wavelength λ 3, wherein λ 1 > λ 2 > λ 3;
the first opening includes a first sub-opening corresponding to the first color light emitting device, a second sub-opening corresponding to the second color light emitting device, and a third sub-opening corresponding to the third color light emitting device, wherein,
the number of the convex parts and the concave parts in the first sub-opening is X 1 The number of the convex parts and the concave parts in the second sub-opening is X 2 The number of the convex parts and the concave parts in the third sub-opening is X 3 Wherein X is 3 >X 2 >X 1 。
12. The display panel according to claim 2, wherein a projection of the first opening on the substrate is a rectangle, the rectangle comprises a first side and a second side, a size of the first side is larger than a size of the second side, and a number of the first side corresponding to the convex portions and the concave portions is Y 1 The number of the convex parts and the concave parts corresponding to the second edge is Y 2 Wherein, Y 2 >Y 1 。
13. The display panel according to any one of claims 1 to 12, further comprising: and the packaging layer comprises a first inorganic packaging layer, an organic packaging layer and a second inorganic packaging layer, the first inorganic packaging layer is used for multiplexing the first optical structure layer, and the organic packaging layer is used for multiplexing the second optical structure layer.
14. The display panel according to any one of claims 1 to 12, further comprising: and the touch layer multiplexes the first optical structure layer and the second optical structure layer.
15. The display panel according to any one of claims 1 to 12, further comprising: and the polarizing layer multiplexes the first optical structure layer and the second optical structure layer.
16. A display device comprising the display panel according to any one of claims 1 to 15.
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| CN114153090B (en) * | 2021-11-29 | 2023-10-20 | 京东方科技集团股份有限公司 | Reflection substrate, preparation method and measurement method thereof and display panel |
| CN114267775B (en) * | 2021-12-14 | 2024-09-10 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
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