CN111029386A - Organic light emitting display panel and organic light emitting display device - Google Patents
Organic light emitting display panel and organic light emitting display device Download PDFInfo
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- CN111029386A CN111029386A CN201911320547.9A CN201911320547A CN111029386A CN 111029386 A CN111029386 A CN 111029386A CN 201911320547 A CN201911320547 A CN 201911320547A CN 111029386 A CN111029386 A CN 111029386A
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- 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
- H10K59/126—Shielding, e.g. light-blocking means over the TFTs
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H10K50/85—Arrangements for extracting light from the devices
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- 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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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Abstract
The embodiment of the invention provides an organic light-emitting display panel and an organic light-emitting display device, relates to the technical field of display, and aims to effectively improve side light leakage and further effectively improve a color mixing phenomenon. The organic light emitting display panel includes: a display area; the display region is provided with a plurality of sub-pixels each including an organic light emitting element; the plurality of reflection structures are arranged on one side of the plurality of sub-pixels facing the light-emitting surface; the planarization film layer covers the plurality of reflection structures, and one side, away from the plurality of reflection structures, of the planarization film layer is a flat plane; the color film layer is arranged on one side, away from the plurality of reflection structures, of the planarization film layer; the reflecting structure comprises an insulating convex block, a first reflecting metal layer and a second reflecting metal layer, wherein the insulating convex block comprises a bottom surface and a side surface intersected with the bottom surface, a slope angle is formed between the bottom surface and the side surface, and the first reflecting metal layer covers the side surface of the insulating convex block; part of the light emitted by the organic light-emitting element is reflected by the first reflective metal layer of the reflective structure and then emitted out through the color film layer.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of display technologies, and in particular, to an organic light emitting display panel and an organic light emitting display device.
[ background of the invention ]
The organic light-emitting panel is internally provided with a plurality of sub-pixels and color film layers which are in one-to-one correspondence with the sub-pixels, and the color film layers are positioned on one sides of the sub-pixel parts facing the light-emitting surface of the organic light-emitting display panel and used for converting light emitted by the sub-pixels into light with colors. However, since the emitting angles of the light emitted from the sub-pixels are relatively divergent, a part of the obliquely emitted light is emitted through the color film layer corresponding to the adjacent sub-pixels, and a side light leakage phenomenon occurs, thereby causing color mixing.
In the prior art, to solve the above problems, the following method is generally adopted: as shown in fig. 1, fig. 1 is a schematic diagram of a film layer structure of an organic light emitting display panel in the prior art, in which a plurality of color film layers 2 ' are respectively filled between adjacent pixel defining layers 1 ' by increasing the height of the pixel defining layer 1 ', and the oblique light emitted from a sub-pixel 3 ' is shielded and reflected by the pixel defining layer 1 '. Alternatively, as shown in fig. 2, fig. 2 is another schematic diagram of a film structure of an organic light emitting display panel in the prior art, a protective layer 6 'is disposed between a color film layer 4' and a sub-pixel 5 ', a reflective metal 7' is disposed on a side surface of the protective layer 6 'contacting the color film layer 4', and the reflective metal 7 'is used to shield and reflect oblique light emitted from the sub-pixel 5'. However, with the above arrangement, the improvement of the color mixing phenomenon is still not significant.
[ summary of the invention ]
In view of the above, embodiments of the present invention provide an organic light emitting display panel and an organic light emitting display device, which can effectively improve side light leakage and further effectively improve color mixing.
In one aspect, an embodiment of the present invention provides an organic light emitting display panel, including:
a display area;
the display area is provided with a plurality of sub-pixels, each of which includes an organic light emitting element;
the plurality of reflection structures are arranged on one side of the plurality of sub-pixels facing the light emitting surface;
a planarization film layer covering the plurality of reflection structures, wherein one side of the planarization film layer, which is far away from the plurality of reflection structures, is a flat plane;
a color film layer disposed on a side of the planarization film layer facing away from the plurality of reflective structures;
the reflecting structure comprises an insulating bump, a first reflecting metal layer and a second reflecting metal layer, wherein the insulating bump comprises a bottom surface and a side surface intersected with the bottom surface, a slope angle is formed between the bottom surface and the side surface, and the first reflecting metal layer covers the side surface of the insulating bump;
part of light emitted by the organic light-emitting element is reflected by the first reflecting metal layer of the reflecting structure and then emitted out through the color film layer.
Optionally, the insulating bump further comprises a top surface disposed opposite to the bottom surface, and the reflective structure further comprises a second reflective metal layer covering the top surface of the insulating bump;
the second reflective metal layer is interconnected with the first reflective metal layer.
Optionally, the organic light emitting device further comprises a thin film encapsulation layer, wherein the thin film encapsulation layer is located between the organic light emitting element and the color film layer; the thin film encapsulation layer comprises the planarization film layer.
Optionally, the planarization film layer includes n sub-film layers stacked, where n is a positive integer greater than or equal to 2;
the height of the insulating bump is smaller than the total thickness of n sub-film layers and larger than the total thickness of n-1 adjacent sub-film layers.
Optionally, the planarization film layer includes n sub-film layers stacked, where n is a positive integer greater than or equal to 2;
the insulating bump and any sub-film layer are formed by the same composition process.
Optionally, the display area includes an open area in which the organic light emitting element is disposed, and a non-open area surrounding the open area; the reflecting structure is positioned on the non-opening area between two adjacent sub-pixels.
Optionally, the reflective structure overlaps with a boundary of the color film layers of two adjacent sub-pixels.
Optionally, the angle of the slope angle is θ, 45 ° ≦ θ ≦ 90 °.
Optionally, the display area comprises a middle display area and a border display area surrounding the middle display area;
the angle of the slope angle of the reflective structure in the middle display region is θ 1, the angle of the slope angle of the reflective structure in the boundary display region is θ 2, and θ 1 > θ 2.
Optionally, a pitch between geometric centers of two adjacent reflection structures is positively correlated with a pitch between two adjacent sub-pixels.
In another aspect, an embodiment of the present invention provides an organic light emitting display device, including the organic light emitting display panel.
Optionally, the organic light emitting display device is a silicon-based micro organic light emitting display device.
One of the above technical solutions has the following beneficial effects:
in the technical solution provided in the embodiment of the present invention, the reflection structure is located in the planarization film layer between the color film layer and the organic light emitting element, and the oblique light emitted by the organic light emitting element in the sub-pixel is shielded by the first reflection metal layer in the reflection structure during transmission and reflected to the color film layer corresponding to the sub-pixel (hereinafter referred to as the self color film layer), so that the oblique light cannot be further transmitted to the color film layer corresponding to the adjacent sub-pixel (hereinafter referred to as the adjacent color film layer).
In addition, the reflection structure is located between the color film layer and the organic light-emitting element, therefore, the height of the reflection structure is not limited by the thickness of the color film layer, and the coverage area of the color film layer is not limited by the occupied space of the reflection structure, namely, the reflection structure can be set to be larger in height, and the color film layer can be set to be larger in coverage area, so that more oblique light rays can be shielded by the reflection structure, the reflected light rays can be ensured to be emitted through the color film layer to a greater degree, and a better color mixing improvement effect is achieved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a film layer structure of an organic light emitting display panel in the prior art;
FIG. 2 is a schematic diagram of another film structure of an organic light emitting display panel in the prior art;
fig. 3 is a top view of an organic light emitting display panel according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along line A1-A2 of FIG. 3;
fig. 5 is a schematic structural diagram of a reflective structure according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another reflective structure according to an embodiment of the present invention;
FIG. 7 is a schematic view of another structure of a reflective structure according to an embodiment of the present invention;
fig. 8 is a schematic diagram of an optical machine provided in an embodiment of the invention for receiving light at different positions of an organic light emitting display panel;
FIG. 9 is a schematic structural diagram of a reflective structure according to an embodiment of the present invention;
FIG. 10 is a graph illustrating relative values of main optical axis-luminance according to an embodiment of the present invention;
FIG. 11 is a diagram illustrating another graph of relative primary optical axis-luminance values according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of another main optical axis-luminance relative value curve provided by an embodiment of the present invention;
FIG. 13 is a schematic structural diagram of a reflective structure in a first border display area according to an embodiment of the present invention;
FIG. 14 is a schematic structural diagram of a reflective structure in a second border display area according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of an organic light emitting display device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention 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.
An embodiment of the present invention provides an organic light emitting display panel, as shown in fig. 3 and 4, where fig. 3 is a top view of the organic light emitting display panel provided by the embodiment of the present invention, and fig. 4 is a cross-sectional view of fig. 3 along a direction a1-a2, the organic light emitting display panel including: a display area 1; the display region 1 is provided with a plurality of sub-pixels 2, each sub-pixel 2 including an organic light emitting element 3; a plurality of reflection structures 4 arranged on one side of the sub-pixels 2 facing the light-emitting surface; a planarization film layer 5 covering the plurality of reflective structures 4, wherein one side of the planarization film layer 5, which is far away from the plurality of reflective structures 4, is a flat plane; a color film layer 6 disposed on a side of the planarization film layer 5 facing away from the plurality of reflective structures 4.
Wherein, the reflecting structure 4 comprises an insulating bump 7, the insulating bump 7 comprises a bottom surface 8 and a side surface 9 intersecting with the bottom surface 8, a slope angle theta is formed between the bottom surface 8 and the side surface 9, and the reflecting structure 4 further comprises a first reflecting metal layer 10 covering the side surface 9 of the insulating bump 7; part of the light emitted from the organic light emitting device 3 is reflected by the first reflective metal layer 10 of the reflective structure 4 and then emitted through the color film layer 6.
It should be noted that, the color film layers 6 are disposed in one-to-one correspondence with the sub-pixels 2, please refer to fig. 3 and 4 again, taking an example that the plurality of sub-pixels 2 include a red sub-pixel 21, a green sub-pixel 22, and a blue sub-pixel 23, the red sub-pixel 21 is correspondingly disposed with a red color film layer 61, light emitted by the organic light emitting element 3 in the red sub-pixel 21 is emitted through the red color film layer 61 and converted into red light, the green sub-pixel 22 is correspondingly disposed with a green color film layer 62, light emitted by the organic light emitting element 3 in the green sub-pixel 22 is emitted through the green color film layer 62 and converted into green light, the blue sub-pixel 23 is correspondingly disposed with a blue color film layer 63, and light emitted by the organic light emitting element 3 in the blue sub-pixel 23 is emitted through the blue color film.
In addition, referring to fig. 4 again, the sub-pixel 2 further includes a transistor 12, and the transistor 12 is used for providing a driving signal to the organic light emitting element 3 to drive the organic light emitting element to emit light. Specifically, the transistor 12 includes an active layer 13, a gate layer 14, and a source drain layer 15, which are stacked, and the organic light emitting device 3 includes an anode layer 16, a light emitting layer 17, and a cathode layer 18, which are stacked, and the structures and the operating principles of the transistor 12 and the organic light emitting device 3 are the same as those of the prior art, and are not described herein again.
In the organic light emitting display panel provided in the embodiment of the present invention, the reflective structure 4 is located in the planarization film layer 5 between the color film layer 6 and the organic light emitting element 3, and the oblique light emitted by the organic light emitting element 3 in the sub-pixel 2 is shielded by the first reflective metal layer 10 in the reflective structure 4 during the transmission process, and is reflected to the color film layer 6 corresponding to the sub-pixel 2 (hereinafter referred to as the self color film layer 6) so as to be unable to be further transmitted to the color film layer 6 corresponding to the adjacent sub-pixel 2 (hereinafter referred to as the adjacent color film layer 6).
In addition, please refer to fig. 1 again in the prior art, the pixel defining layer 1 ' is located between two adjacent color film layers 2 ', so that the coverage area of the color film layers 2 ' is limited by the space occupied by the pixel defining layer 1 ', and in addition, the thickness of the color film layers 2 ' is small, so that a part of oblique light (as shown by an arrow in the figure) is reflected by the pixel defining layer 1 ' and then directly emitted through the light emitting surface, and cannot pass through the color film layers 2 ' for color conversion, thereby causing a certain degree of color mixing of the light emitted from the sub-pixels. Or, referring to fig. 2 again, the reflective metal 7 ' is only disposed on the side surface of the color film layer 4 ', and since the color film layer 4 ' has a small thickness, there still exists a portion of oblique light (as indicated by an arrow in the figure) that cannot be blocked by the reflective metal 7 ', and the oblique light is directly incident into the adjacent color film layer 4 ', so that the effect of improving the color mixing phenomenon is not good.
In the embodiment of the present invention, the reflective structure 4 is located between the color film layer 6 and the organic light emitting element 3, so that the height of the reflective structure 4 is not limited by the thickness of the color film layer 6, and the coverage area of the color film layer 6 is not limited by the space occupied by the reflective structure 4, i.e., the reflective structure 4 can be set to a larger height, and the color film layer 6 can be set to a larger coverage area, so that not only more oblique light rays can be shielded by the reflective structure 4, but also the reflected light rays can be ensured to be emitted through the color film layer 6 to a greater extent, thereby playing a better color mixing improvement effect.
Alternatively, as shown in fig. 5, fig. 5 is a schematic structural diagram of the reflective structure according to the embodiment of the present invention, the insulating bump 7 further includes a top surface 19 disposed opposite to the bottom surface 8, and the reflective structure 4 further includes a second reflective metal layer 20 covering the top surface 19 of the insulating bump 7; the second reflective metal layer 20 is interconnected with the first reflective metal layer 10. Specifically, when the reflective structure 4 is formed, the first reflective metal layer 10 and the second reflective metal layer 20 may be formed using the same patterning process.
The second reflective metal layer 20 is disposed on the top surface 19 of the convex insulating block 7, so that the light emitted obliquely can be further shielded by the second reflective metal layer 20, the improvement effect of oblique light leakage can be optimized, and the second reflective metal layer 20 can also shield the non-light-emitting region, thereby preventing the light emitted by the organic light-emitting element 3 from being emitted via the non-light-emitting region, and further preventing the light used for normal display from causing crosstalk.
Optionally, referring to fig. 5 again, the organic light emitting display panel further includes a thin film encapsulation layer 21, and the thin film encapsulation layer 21 is located between the organic light emitting device 3 and the color film layer 6; the thin film encapsulation layer 21 includes a planarization film layer 5. The encapsulation layer is arranged on the side, facing the light emitting surface, of the organic light emitting element 3, so that the organic light emitting element 3 can be coated by the encapsulation layer, external water and oxygen are prevented from invading into the organic light emitting element 3 to corrode the organic light emitting element 3, and the stability of the working performance of the organic light emitting element 3 is improved.
Alternatively, as shown in fig. 6, fig. 6 is another schematic structural diagram of the reflection structure provided in the embodiment of the present invention, where the planarization film layer 5 includes n sub-film layers 22 stacked one on another, where n is a positive integer greater than or equal to 2; the height of the insulating bump 7 is less than the total thickness of n sub-film layers 22 and greater than the total thickness of the adjacent n-1 sub-film layers 22.
It should be noted that the height of the insulating bump 7 refers to the height of the insulating bump 7 in the direction perpendicular to the plane of the organic light emitting display panel, and the total thickness of the n sub-film layers 22 refers to the total thickness of the n sub-film layers 22 in the direction perpendicular to the plane of the organic light emitting display panel.
By adopting the above arrangement, the insulating bump 7 has a larger height, and accordingly, the coverage area of the first reflective metal layer 10 arranged on the side surface 9 of the insulating bump 7 is increased, so that the first reflective metal layer 10 shields and reflects more oblique light rays, and thus, the lateral light leakage phenomenon can be improved to a greater extent, the light mixing improvement effect is optimized, more light rays can be reflected to the self color film layer 6, and the light emitting brightness of the self sub-pixel 2 is improved to a greater extent.
Alternatively, as shown in fig. 7, fig. 7 is a schematic view of another structure of the reflective structure according to the embodiment of the present invention, in which the planarization film layer 5 includes n sub-film layers 22 stacked one on another, where n is a positive integer greater than or equal to 2; the insulating bump 7 is formed by the same patterning process as any of the sub-film layers 22. For example, referring to fig. 7 again, the planarization film layer 5 includes a first sub-film layer 221 and a second sub-film layer 222 stacked, the second sub-film layer 222 is located on a side of the first sub-film layer 221 facing the light-emitting surface of the organic light-emitting display panel, the first sub-film layer 221 and the second sub-film layer 222 are both formed of a silicon nitride material, and both thicknesses are a, and the insulating bump 7 and the first sub-film layer 221 are formed by using the same patterning process, for example, in the process of forming the first sub-film layer 221, the second sub-film layer 222 and the insulating bump 7, first, a silicon nitride film layer with a thickness of B, where B > a, is formed, the silicon nitride film layer is exposed, developed and etched by using a mask plate, to form the first sub-film layer 221 and the insulating bump 7 with a thickness, and then a silicon nitride film layer with a thickness is formed on the first sub-film layer 221 to form the second sub-film layer 222.
By adopting the arrangement mode, the insulating convex blocks 7 are independently formed without adopting an additional composition process, the process flow is simplified, and the manufacturing cost is reduced. Moreover, the insulating convex block 7 and a certain sub-film layer 22 are integrally formed, so that the stability of the insulating convex block 7 can be improved, the relative position deviation of the insulating convex block 7 under the action of external force is avoided, and the shielding stability of the reflecting structure 4 for oblique light rays is further ensured.
Alternatively, referring again to fig. 7, the display area includes an opening area 23 in which the organic light emitting element 3 is disposed, and a non-opening area 24 surrounding the opening area 23; the reflective structure 4 is located on the non-opening area 24 between two adjacent sub-pixels 2. The opening 23 is a light exit region of the organic light emitting display panel, and the opening 23 corresponds to a position where the light emitting layer of the organic light emitting element 3 is disposed. The reflection structure 4 is arranged on the non-opening area 24 between two adjacent sub-pixels 2, so that the reflection structure 4 can shield and reflect oblique light rays, and the influence of the reflection structure 4 on normal light emission of the opening area 23 can be avoided.
Further, referring to fig. 7 again, the minimum distance between the first reflective metal layers 10 in two adjacent reflective structures 4 is h1, and the width of the opening region 23 in the arrangement direction of the two adjacent reflective structures 4 is h2, such that h1 and h2 satisfy: h1 is more than or equal to h2, so that the light emitted from the opening area 23 is prevented from being shielded by the first reflective metal layer 10 in the reflective structure 4, and the light emitting effect is optimized.
Further, referring to fig. 7 again, the boundary between the reflective structure 4 and the color film layer 6 of the two adjacent sub-pixels 2 is overlapped, at this time, the reflective structure 4 is located at a relatively central position between the two adjacent sub-pixels 2, and the distance between the reflective structure 4 and the two adjacent sub-pixels 2 is equivalent, so that the oblique light rays emitted by the organic light emitting elements 3 of the two adjacent sub-pixels 2 by the reflective structure 4 can be effectively shielded and reflected.
Optionally, the angle of the slope angle in the reflective structure 4 is θ, and to ensure that the reflected light can be emitted within the range of the viewing angle of the observer, θ may satisfy: theta is more than or equal to 45 degrees and less than or equal to 90 degrees. Set up the minimum value of theta to 45, can avoid the slope angle undersize to avoid the light after the reflection to jet out with great squint angle, set up the maximum value of theta to 90, can avoid the slant light to be transmitted towards the direction of going out the plain noodles dorsad after being reflected, reduce the loss of emergent ray.
Further, for head-mounted organic light emitting display panels, such as Virtual Reality (VR) organic light emitting display panels and Augmented Reality (AR) organic light emitting display panels, it is necessary to guide light emitted from the organic light emitting display panels to the eyes of the observer by using a light engine. Because different areas of the display area are matched with different visual angles, the light receiving angles (main optical axes) of the light machine in the different areas of the display area are different. For example, as shown in fig. 8, fig. 8 is a schematic diagram of light collection of the optical engine to different positions of the organic light emitting display panel according to the embodiment of the present invention, the optical engine collects light at a positive viewing angle in a central region CR of the organic light emitting display panel, a main optical axis is about 0 °, and the optical engine collects light at a negative viewing angle in a peripheral region SR of the organic light emitting display panel, and the main optical axis may be in a range of 20 ° to 50 ° or-20 ° to-50 °.
Based on this, referring to fig. 3, as shown in fig. 9, fig. 9 is a schematic structural diagram of a reflection structure provided in an embodiment of the present invention, where the display area includes an intermediate display area 25 and a boundary display area 26 surrounding the intermediate display area 25, an angle of a slope angle of the reflection structure 4 in the intermediate display area 25 is θ 1, an angle of a slope angle of the reflection structure 4 in the boundary display area 26 is θ 2, and θ 1 and θ 2 may satisfy: theta 1 > theta 2.
Referring to fig. 9 again, for the oblique light transmitted to the reflection structure 4 along the same direction, after being reflected by the reflection structure 4 with a larger slope angle, the oblique light is emitted closer to the normal angle, so as to enhance the light-emitting energy of the main optical axis with a smaller angle, and after being reflected by the reflection structure 4 with a smaller slope angle, the oblique light is emitted closer to the oblique angle, so as to enhance the light-emitting energy of the main optical axis with a larger angle, therefore, by making θ 1 corresponding to the middle display area 25 larger than θ 2 corresponding to the boundary display area 26, the light-receiving intensity of the optical engine to the middle display area 25 and the boundary display area 26 can be improved at the same time, and the light waste at a larger angle can be reduced.
Further, according to actual requirements, slope angles in different display regions may be specifically defined, as shown in fig. 10, fig. 10 is a schematic diagram of a main optical axis-luminance relative value provided in an embodiment of the present invention, and as can be seen from fig. 10, when a distance d between geometric centers of two adjacent reflection structures 4 is fixed, for example, if a main optical axis corresponding to a certain portion of the display region 1 is about 10 °, a slope angle of a reflection structure 4 may be set to be 75 ° which is larger, at this time, light intensity at the main optical axis is larger, and light receiving intensity of the optical engine under the main optical axis is improved; if the main optical axis corresponding to a certain portion of the display area 1 is about 20 degrees, the slope angle of the reflection structure 4 can be set to be 45 degrees, so as to improve the light receiving intensity of the optical machine under the main optical axis.
Further, when the angle of the slope angle is constant, the distance d between the geometric centers of two adjacent reflecting structures 4 can be adjusted to match different main optical axes. Specifically, as shown in fig. 11, fig. 11 is another graph illustrating the main optical axis-luminance relative value provided by the embodiment of the present invention, and it can be seen from fig. 11 that when the slope angle of the reflection structure 4 is constant (θ is 75 °), for example, when the main optical axis is about 10 °, d is set to be larger, so as to increase the light intensity of the main optical axis, and when the main optical axis is about 40 °, d is set to be smaller, so as to increase the light intensity of the main optical axis. Alternatively, as shown in fig. 12, fig. 12 is a further graph illustrating the main optical axis-luminance relative value provided by the embodiment of the present invention, and it can be seen from fig. 12 that when the slope angle of the reflection structure 4 is constant (θ is 45 °), and the main optical axis is about 20 ° and 30 °, d can be set smaller to increase the light intensity of the main optical axis, and d can be set larger when the main optical axis is about 40 °.
Further, referring to fig. 8, it can be seen that the angles of the main optical axes corresponding to the peripheral regions SR on both sides of the central region CR are opposite, based on which, referring to fig. 3 again, the boundary display region 26 includes a first boundary display region 261 and a second boundary display region 262 which are oppositely disposed, the first boundary display region 261 and the second boundary display region 262 are respectively located on both sides of the middle display region 25, the main optical axis corresponding to the first boundary display region 261 is- α, and the main optical axis corresponding to the second boundary region 262 is + α.
Based on this, each of the reflective structures 4 in the first border display area 261 and the second border display area 262 may have a different slope angle, for example, as shown in fig. 13, fig. 13 is a schematic structural diagram of a reflective structure in the first border display area provided by an embodiment of the present invention, in the first border display area 261, each of the reflective structures 4 has a first slope angle θ 21 and a second slope angle θ 22, where θ 21 ≠ θ 22, and, for two reflective structures 4 adjacent to one sub-pixel 2, the slope angles at portions where the two reflective structures 4 are facing are different, so that after a light ray emitted from the sub-pixel 2 is reflected by the two reflective structures 4, the emission direction of the reflected light ray is both approaching to the positive axis of- α, or, as shown in fig. 14, fig. 14 is a schematic structural diagram of a reflective structure in the second border area provided by an embodiment of the present invention, in the second border display area 262, each of the reflective structures 4 has a third slope angle θ 23 and a fourth slope angle θ 24, and, where the reflection angle θ 24 is both of the reflected light ray is approaching to the positive axis of the two reflective structures α, so that the two reflective structures after the reflected light ray is both approaching to the positive axis of the two reflective structures 4, and so that the reflected light ray is approaching the two reflective structures 364.
With this arrangement, the light receiving intensity of the optical engine in the first boundary display region 261 and the second boundary display region 262 can be further increased, thereby increasing the light receiving intensity in the entire boundary display region 26.
Alternatively, in conjunction with fig. 6, the distance d between the geometric centers O of two adjacent reflective structures 4 is positively correlated with the distance between two adjacent sub-pixels 2. That is, the smaller the pitch between two adjacent sub-pixels 2 is, correspondingly, the smaller the pitch between the geometric centers of two adjacent reflective structures 4 is, the larger the pitch between two adjacent sub-pixels 2 is, correspondingly, the larger the pitch between the geometric centers of two adjacent reflective structures 4 is, thereby ensuring that the pitch of the reflective structures 4 matches with the pitch of the sub-pixels 2.
As shown in fig. 15, fig. 15 is a schematic structural diagram of an organic light emitting display device according to an embodiment of the present invention, where the organic light emitting display device includes the organic light emitting display panel 100. The specific structure of the organic light emitting display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 15 is only a schematic illustration, and the display device may be any electronic device having a display function, such as a Virtual Reality (VR) device, an Augmented Reality (AR) device, a mobile phone, a tablet computer, a notebook computer, an electronic paper book, or a television.
Since the organic light emitting display device provided by the embodiment of the invention includes the organic light emitting display panel 100, the organic light emitting display device can not only avoid oblique light leakage and effectively improve the color mixing phenomenon, but also improve the light emitting brightness of the sub-pixels and optimize the display performance.
Optionally, the organic light emitting display device provided by the embodiment of the invention is a silicon-based micro organic light emitting display device. The silicon-based micro organic light-emitting display device takes the monocrystalline silicon chip as a substrate, the pixel size is 1/10 of the traditional organic light-emitting display device, the pixel fineness is higher, and the silicon-based micro organic light-emitting display device has a higher application prospect in the display fields of virtual reality, augmented reality and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. An organic light emitting display panel, comprising:
a display area;
the display area is provided with a plurality of sub-pixels, each of which includes an organic light emitting element;
the plurality of reflection structures are arranged on one side of the plurality of sub-pixels facing the light emitting surface;
a planarization film layer covering the plurality of reflection structures, wherein one side of the planarization film layer, which is far away from the plurality of reflection structures, is a flat plane;
a color film layer disposed on a side of the planarization film layer facing away from the plurality of reflective structures;
the reflecting structure comprises an insulating bump, a first reflecting metal layer and a second reflecting metal layer, wherein the insulating bump comprises a bottom surface and a side surface intersected with the bottom surface, a slope angle is formed between the bottom surface and the side surface, and the first reflecting metal layer covers the side surface of the insulating bump;
part of light emitted by the organic light-emitting element is reflected by the first reflecting metal layer of the reflecting structure and then emitted out through the color film layer.
2. The organic light emitting display panel of claim 1, wherein the insulating bump further comprises a top surface disposed opposite the bottom surface, the reflective structure further comprising a second reflective metal layer covering the top surface of the insulating bump;
the second reflective metal layer is interconnected with the first reflective metal layer.
3. The organic light-emitting display panel according to claim 1, further comprising a thin film encapsulation layer between the organic light-emitting element and the color film layer; the thin film encapsulation layer comprises the planarization film layer.
4. The organic light-emitting display panel according to claim 1, wherein the planarization film layer comprises n sub-film layers arranged in a stacked manner, wherein n is a positive integer greater than or equal to 2;
the height of the insulating bump is smaller than the total thickness of n sub-film layers and larger than the total thickness of n-1 adjacent sub-film layers.
5. The organic light-emitting display panel according to claim 1, wherein the planarization film layer comprises n sub-film layers arranged in a stacked manner, wherein n is a positive integer greater than or equal to 2;
the insulating bump and any sub-film layer are formed by the same composition process.
6. The organic light-emitting display panel according to claim 1, wherein the display area includes an opening area where the organic light-emitting element is disposed, and a non-opening area surrounding the opening area; the reflecting structure is positioned on the non-opening area between two adjacent sub-pixels.
7. The panel of claim 6, wherein the reflective structure overlaps the boundary of the color film layers of two adjacent sub-pixels.
8. The organic light-emitting display panel according to claim 1, wherein the angle of the slope is θ, and θ is 45 ° ≦ θ ≦ 90 °.
9. The organic light emitting display panel according to claim 1, wherein the display area includes a middle display area and a border display area surrounding the middle display area;
the angle of the slope angle of the reflective structure in the middle display region is θ 1, the angle of the slope angle of the reflective structure in the boundary display region is θ 2, and θ 1 > θ 2.
10. The organic light-emitting display panel according to claim 1, wherein a pitch between geometric centers of two adjacent reflective structures is positively correlated with a pitch between two adjacent sub-pixels.
11. An organic light-emitting display device comprising the organic light-emitting display panel according to any one of claims 1 to 10.
12. The organic light-emitting display device according to claim 11, wherein the organic light-emitting display device is a silicon-based micro organic light-emitting display device.
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