CN110676301B - Organic light-emitting display panel and display device - Google Patents
Organic light-emitting display panel and display device Download PDFInfo
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Abstract
An embodiment of the present application provides an organic light emitting display panel and a display device including: the display device comprises a semitransparent display area, a normal display area and a non-display area, wherein the normal display area at least semi-surrounds the semitransparent display area, and the non-display area surrounds the normal display area and the semitransparent display area; the array substrate, the plurality of sub-pixels, the packaging layer and the anti-reflection layer are arranged in sequence, and the sub-pixels are arranged between the array substrate and the packaging layer; the anti-reflection layer comprises a plurality of color resistors and a black matrix, the color resistors are arranged corresponding to the sub-pixels, and the color resistors cover the sub-pixels; the sub-pixel density of the semi-transparent display area is less than that of the normal display area, and the thickness of the color resistor in the semi-transparent display area is less than that of the color resistor in the normal display area. The difference of the color resistance transmittance caused by the difference of the color resistance thickness is utilized to balance the difference of the current density of the semi-transparent display area and the normal display area, thereby achieving the purpose of balancing the service life.
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 ]
With the development of display technology, consumers expect true full screens without bangs, water drops or round holes more and more, and due to the fact that physical through holes exist in the previous full screens of the types, the full screens which cannot achieve the real 100% screen proportion cannot be achieved. Compared with the first-generation full-screen of the above types, the display screen has the advantages that the transparent holes are arranged, the pixel density in the transparent holes is reduced, the transmittance is increased, and the display function and the photographing function can be realized. It is a second generation full screen that can achieve a true 100% screen fraction.
However, the pixel density at the transparent hole is decreased, and if the same brightness as that of the normal display area is to be achieved, the current density of the sub-pixels is too high, resulting in a fast lifetime degradation of the sub-pixels at the transparent hole. After a period of use, severe brightness reduction and color shifts occur and cannot meet the customer's requirements for volume production. This is also an important factor in the emergence of full screen products that limit 100% screen fraction.
[ summary of the invention ]
Embodiments of the present invention provide an organic light emitting display panel and a display device including the same to solve the above problems.
In one aspect, the present application provides an organic light emitting display panel including: the display device comprises a semi-transparent display area, a normal display area and a non-display area, wherein the normal display area at least semi-surrounds the semi-transparent display area, and the non-display area surrounds the normal display area and the semi-transparent display area;
the array substrate, the plurality of sub-pixels, the packaging layer and the anti-reflection layer are sequentially arranged, and the sub-pixels are arranged between the array substrate and the packaging layer; the antireflection layer comprises a plurality of color resistors and a black matrix, wherein the color resistors are arranged corresponding to the sub-pixels and cover the sub-pixels;
the sub-pixel density of the semi-transparent display area is smaller than that of the normal display area, and the thickness of the color resistance in the semi-transparent display area is smaller than that of the color resistance in the normal display area.
In another aspect, the present application provides a display device including the organic light emitting display panel.
According to the organic light emitting display panel and the organic light emitting display device provided by the application, the color resistor and the black matrix are adopted as anti-reflection layers to replace the traditional polaroid, the color resistor thickness adopted by the normal display area is thicker, the color resistor thickness adopted by the semi-transparent display area is thinner, the difference of current density of the semi-transparent display area and the normal display area is balanced by utilizing the color resistor transmittance difference, and the purpose of balancing the service life is further 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 view of an organic light emitting display panel according to the present application;
FIG. 2 is a partially enlarged view of a region B of the organic light emitting display panel of FIG. 1;
FIG. 3 is a schematic cross-sectional view of A-A' of the organic light emitting display panel of FIG. 1;
fig. 4 is another schematic cross-sectional view of an organic light emitting display panel of the present application;
fig. 5 is a schematic cross-sectional view of an organic light emitting display panel according to the present application;
fig. 6 is a schematic cross-sectional view of an organic light emitting display panel according to the present application;
FIG. 7 is a schematic view of an organic light emitting display device of the present application;
[ 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.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe colors in embodiments of the present invention, the colors should not be limited to these terms. These terms are only used to distinguish colors from each other. For example, a first color may also be referred to as a second color, and similarly, a second color may also be referred to as a first color, without departing from the scope of embodiments of the present invention.
First, the luminance L has the following relationship with the current density j, the device efficiency E, and the sub-pixel aperture ratio AR. L (j, AR) ═ j × e (j) × AR; wherein, the brightness L: luminous flux emitted by a light source in a single solid angle per unit surface area perpendicular to its radiation transmission direction, in units of cd/m2(ii) a Current density j: magnitude of current per unit area in mA/cm2(ii) a Efficiency E: magnitude of luminance generated per unit current, unit cd/m2(ii) a The aperture ratio AR defines: the actual light-emitting area of the sub-pixel of a certain color accounts for the percentage of the pixel area.
Through the formula, the method can be deduced
That is, the current density is proportional to the luminance, and inversely proportional to the aperture ratio AR and the efficiency E. Since the efficiency is the same in the case where the light emitting device designs are uniform within the display panel, the smaller the aperture ratio is, the larger the current density is in the case where the normal display area and the translucent display area are uniform in luminance. Whereas in semi-transparent display areas the sub-pixel density is typically only 1/2 or even lower for normal display areas. The current density of the semi-transparent display area is more than 2 times that of the normal display area according to the above relationship. According to the relation formula of current density and service life
Wherein n represents an acceleration decay coefficient; LT95 represents the time required for the luminance to decay to 95% of the initial luminance; LT9550Representative current density of 50mA/cm2Time to decay of brightness to 95%; j is a function of50Representative current density of 50mA/cm2. From the above relationship, it can be understood that the lifetime is shorter as the current density is larger, and the lifetime LT95 is reduced as the current density is increased, that is, the lifetime degradation is more serious. Therefore, the sub-pixels in the semi-transparent display area are attenuated too fast, so that the brightness of the normal display area is normally attenuated after the semi-transparent display area is used for a period of time, and the brightness of the semi-transparent display area is accelerated to be attenuated, so that the two display areas have obvious brightness difference. On the other hand, the red, green and blue sub-pixels of the display panel are composed ofThe lifetime differences exist among different luminescent materials. In the normal display area, since the decay rate is slow, the difference is not excessively enlarged, and the color display is relatively normal. In the semi-transparent display area, the attenuation speeds of red, green and blue are different, and the difference of the brightness of the red, green and blue can be increased due to the accelerated attenuation caused by overlarge current density, so that obvious color cast occurs in the semi-transparent display area. The translucent display area is easy to be perceived due to the obvious color difference of the brightness between the translucent display area and the normal display area, and the requirement of mass production of customers cannot be met. The production of a comprehensive screen product with 100 percent of screen ratio is restricted.
The present application provides an organic light emitting display panel for solving the above technical problems. Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic view of an organic light emitting display panel according to the present application; FIG. 2 is a partially enlarged view of a region B of the organic light emitting display panel of FIG. 1; FIG. 3 is a schematic cross-sectional view of A-A' of the organic light emitting display panel of FIG. 1;
the application provides an organic light emitting display panel, including: the display device comprises a semitransparent display area TA, a normal display area AA and a non-display area NA, wherein the normal display area AA at least semi-surrounds the semitransparent display area TA, and the non-display area NA surrounds the normal display area AA and the semitransparent display area TA; fig. 1 shows that only one side of the translucent display area TA is closely attached to one side of the non-display area NA, and the other three sides of the translucent display area TA are disposed adjacent to the normal display area. For example, the entire translucent display area TA is disposed in the normal display area AA, and four sides of the translucent display area TA are disposed adjacent to the normal display area AA; or the semitransparent display area TA is arranged at one corner of the display area, wherein two sides of the semitransparent display area TA are adjacent to the non-display NA, and the other two sides of the semitransparent display area TA are adjacent to the normal display area; or the length of the semitransparent display area TA is larger than or equal to that of the normal display area, so that three sides of the semitransparent display area TA are adjacent to the non-display NA, and one side of the semitransparent display area TA is adjacent to the normal display area; or the semi-transparent display area is circular or other shapes, so long as the semi-transparent display area TA and the normal display area have adjacent edges, which can cause visual continuity, all belong to the normal display area AA described in the present application that at least semi-surrounds the semi-transparent display area TA. This is not particularly limited in the present application.
With continuing reference to fig. 2 and fig. 3, the organic light emitting display panel of the present application includes an array substrate 100, a plurality of sub-pixels P, an encapsulation layer 200 and an anti-reflection layer 300, which are sequentially disposed, wherein the sub-pixels P are disposed between the array substrate 100 and the encapsulation layer 200; the antireflection layer 300 includes a plurality of color resistors 310 and a black matrix 320, the color resistors 310 are disposed corresponding to the sub-pixels P, and the color resistors 310 cover the sub-pixels P; in a conventional organic light-emitting display panel, a polarizer is usually used for antireflection, circularly polarized light of ambient light is converted into linearly polarized light through a linear polarizer, the linearly polarized light is reflected by a display panel through an 1/4 wave plate, and then the phase angle of the linearly polarized light is just 90 degrees different from that of the initial linear polarizer after passing through a 1/4 wave plate, so that reflected light cannot be emitted out of the display panel, and the reflection of the organic light-emitting display panel is weakened. And this application adopts colour drag 310 and black matrix 320 to realize the antireflection, and colour drag covers sub-pixel P not only can play the effect of antireflection and can also filter sub-pixel's spectrum for the spectrum is narrowed, and color purity is higher. The black matrix can completely absorb the ambient light, and the color resists can also play a role in antireflection. Experiments prove that after the array substrate is actually measured to increase the color resistance and the black matrix, the reflectivity can be reduced to 6-10%. The color resistance film thickness is increased from 1.6um to 2.6um, the reflectivity is reduced from 7.65% to 6.13%, and the white light transmittance is reduced by 19.95%. It can be seen that the color resists and black matrix can fully act as an anti-reflective.
In the present application, the sub-pixel density of the semi-transparent display area TA is less than that of the normal display area AA, so that the light transmittance of the semi-transparent display area can meet the requirement of the optical sensor device (e.g., a camera module) on the light transmittance. The sub-pixel P includes an anode, a light emitting material layer, and a cathode, and light is emitted from the light emitting material layer and the direction of emission is arbitrary, including emitting light toward the cathode and toward the anode. At least one of the cathode and the anode is a reflective electrode in order to improve the efficiency of light extraction. This results in the sub-pixel P being opaque. In addition, a driving circuit for driving the sub-pixel P to emit light is required in addition to the sub-pixel P, and the driving circuit includes a transistor, a capacitor, a signal line, and other light-impermeable membersTherefore, the light transmittance of the organic light emitting display panel is extremely low under the condition of the traditional pixel density at the present stage. In order to meet the requirement of an optical sensor module (such as a camera module) on light transmittance, the pixel density of the semi-transparent display area is reduced, the area without the pixels is changed into the light-transmitting area, the light transmittance of the semi-transparent display area TA is increased, and the sub-pixels of the semi-transparent display area can also realize the display function. However, after the pixel density of the semi-transparent display area TA is reduced, in order to maintain the luminance of the semi-transparent display area TA and the normal display area AA, which will always result in the current density of the semi-transparent display area TA being increased, and the lifetime attenuation being severe, the thickness of the color resistor 310a located in the semi-transparent display area TA is set to be smaller than the thickness of the color resistor 310b located in the normal display area AA. The light transmittance of the translucent display area TA is improved, and the light extraction efficiency of the normal display area AA is reduced. According to the preceding formula:
this corresponds to a reduction in the efficiency E of the normal display area to compensate for the low aperture ratio of the translucent display area. Specifically, in the translucent display area TA, the aperture ratio AR is low, and the efficiency E is high due to the thin color resistance; the aperture ratio AR is higher in the normal display area, and the efficiency E is lower due to the thicker color resistance, so that the product of the aperture ratio AR and the efficiency E is close to or even equal to each other in the semi-transparent display area TA and the normal display area AA, and the current density J is close to or equal to each other when the same luminance L is achieved, so that the service life attenuation of the semi-transparent display area TA and the normal display area TA is similar, and the existence of the semi-transparent display area is prevented from being perceived by human eyes. On the other hand, the smart point of the application is that because the pixel density of the semitransparent display area TA is low, the area of the reflecting electrode and the area of the reflecting metal are smaller than those of the normal display area, even if the color resistance is thin, the transmittance is high, the antireflection effect of the semitransparent display area TA is equivalent to that of the normal display area AA, and the phenomenon that the semitransparent display area TA reflects light seriously can not occur.
In contrast, according to the principle of antireflection of the polarizer in the prior art, theoretically, half of the light emitted by the sub-pixels is filtered by the linear polarizer; the transmittance of the traditional polaroid is not controlled by the thickness, the adjustment of the thickness has little influence on the transmittance, and the transmittance of a semi-transparent display area and the transmittance of a normal display area cannot be adjusted through the thickness difference of color resistance so as to enable the current density to be consistent.
Further, with continued reference to fig. 3, the sub-pixel P includes an anode 151, a light-emitting material layer 152 and a cathode 152; taking a top emission display panel as an example, the anode is a total reflection electrode, a pixel defining layer 145 is disposed on the anode 151, the pixel defining layer 145 has an opening, an emission material layer 152 covers the pixel defining layer opening, and the cathode 152 covers the emission material layer 152; the array substrate 100 includes a driving circuit 500, and the anode 151 is electrically connected to the driving circuit 500. The color resists 310 cover the openings of the pixel definition layer corresponding to the sub-pixels so that the light of the sub-pixels can be filtered completely to ensure consistency.
The array substrate 100 of the present application includes a substrate 110, and an active layer 120, a gate insulating layer 141, a gate metal layer 131, a first interlayer insulating layer 142, a capacitor metal layer 132, a second interlayer insulating layer 143, a source drain metal layer 133, a planarization layer 144, an anode 151, and a pixel defining layer 145, which are sequentially disposed on the substrate 110; and the pixel defining layer 145 forms an opening in which the light emitting material layer 152 is formed; finally, a cathode 153 is formed to cover the light emitting material layer 152. The encapsulation layer 200 disposed on the array substrate 100 includes a first inorganic layer 211, an organic layer 212, and a second inorganic layer 213. The first inorganic layer 211 is used to block the organic layer 212 and the sub-pixels, and prevent moisture and oxygen or other impurities in the organic layer from permeating and reacting with the organic light emitting material to damage the organic light emitting material, which may result in failure of the display panel. The organic layer 212 is used to relieve stress and prevent moisture and oxygen ingress due to cracking of the inorganic layer. The second inorganic layer 213 is used to prevent moisture and oxygen in the external environment, such as the front display panel. Moreover, the first inorganic layer 211 and the second inorganic layer 213 form a double protection, which increases the path length and the meandering degree of the intrusion and reduces the probability of being intruded. The anti-reflection layer 300 of the present application is formed on a side of the encapsulation layer 200 away from the sub-pixels. On one hand, the device can play a role in avoiding the invasion of water vapor and oxygen to a certain extent; on the other hand, the organic light-emitting device is prevented from being damaged by the process of forming the color resistor and the black matrix.
Further, referring to fig. 5, an inorganic barrier layer is disposed between the anti-reflection layer 300 and the encapsulation layer 200. In the past, the color resistors and the black matrix are formed into a color film substrate and are supplied to a liquid crystal display panel to be used as a counter substrate, and the color resistors and the black matrix are directly arranged on glass, so that the problem of color leakage is not noticed. The inorganic barrier layer 600 in this embodiment is an impermeable layer, and is disposed between the antireflection layer 300 and the encapsulation layer 200 to prevent color resistance or color of the black matrix from leaking to the flexible thin film encapsulation layer 200, thereby avoiding abnormal display.
Further, an optical transparent adhesive layer 400 is disposed on the anti-reflection layer 300, and the optical transparent adhesive layer 400 is an organic layer. The organic layer has good fluidity, and can make up the thickness difference between the semitransparent display area TA and the normal display area AA caused by the thickness difference of the color resistance, so that the upper surface of the whole organic light-emitting display panel is flat, and the organic light-emitting display panel is favorably attached to the protective glass.
Further, please refer to fig. 4, fig. 4 is another schematic cross-sectional view of an organic light emitting display panel according to the present application; the sub-pixel P includes a first color sub-pixel P1, a second color sub-pixel P2, and a third color sub-pixel P3; the color resistors comprise a first color resistor 311, a second color resistor 312 and a third color resistor 313; the first color, the second color, and the third color are different from each other; the first color resistor 311 covers the first sub-pixel P1, the second color resistor 312 covers the second sub-pixel P2, and the third color resistor 313 covers the third sub-pixel P3.
Further, with continued reference to fig. 2 and fig. 3, the pixel defining layer includes an open area and a non-open area, the non-open area covers the black matrix 320b in the normal display area AA, and the black matrix 320b covers the area except the color resistor 310 b; so that the light of the sub-pixels can be filtered completely to ensure consistency. On the other hand, the black matrix and the color resistor are spliced with each other without gaps, so that the reflection of light rays at the gaps is avoided. And the width of the black matrix 320b is smaller than the width of the non-opening area of the pixel definition layer to reserve the redundancy of alignment, so as to avoid the light emitted by the sub-pixel due to misalignment.
The semitransparent display area TA comprises a pixel light emitting area E, a wiring area L and a light transmitting area T; the sub-pixels P are positioned in the pixel light emitting areas E, the pixel light emitting areas E are connected through the wiring areas L, and the light transmitting areas T are surrounded by the wiring areas L and the pixel light emitting areas E; in the translucent display area TA, the black matrix 320a covers the routing area L, and the black matrix 320a does not overlap with the light emitting area E and the light transmitting area T. On one hand, the black matrix 320a is not overlapped with the light emitting area E and the light transmitting area T, so that the light emitting uniformity of the sub-pixels is prevented from being influenced, the light transmitting area is increased, and the overall light transmittance of the semitransparent display area is improved; on the other hand, the black matrix 320 covers the routing area L to prevent diffraction from occurring in the gap between the traces. Most importantly, reflection caused by metal wiring is avoided, and under the conditions of thin color resistance thickness and weak anti-reflection capability, reflection light of the semi-transparent display area TA is reduced, so that the difference of reflectivity of the semi-transparent display area TA and the normal display area AA is avoided.
In an embodiment of the present application, please refer to fig. 5 and fig. 6, fig. 5 is a schematic cross-sectional view of an organic light emitting display panel of the present application; fig. 6 is a schematic cross-sectional view of an organic light emitting display panel according to the present application;
the thicknesses of the first color resistor 311, the second color resistor 312 and the third color resistor 313 in the semi-transparent display area TA are all 0. Thus, the efficiency E value of the sub-pixels of the translucent display area TA will be the maximum value without being affected by the color resistance. The product of the aperture ratio and the efficiency is the theoretical maximum. The reduced efficiency of the normal display area AA required to maintain the same product thereof is relatively small, so that the overall power consumption of the display panel is relatively small. And simultaneously according to the formula:
when the product of the aperture ratio AR and the efficiency E is a maximum value, the current density j is a minimum value, and the lifetime degradation of the organic light emitting display panel is also the weakest.
Taking the pixel density of the semi-transparent display area TA as 1/4 of the normal display area AA as an example, that is, the aperture ratio AR of the semi-transparent display area TA is only the normal display area 1/4, when the luminance of the semi-transparent display area is consistent with that of the normal display area, the current density of the semi-transparent display area is 4 times that of the normal display area. The design value of the color resistance transmittance is 20-50%, and because the translucent display area TA in the embodiment has no color resistance, based on the following simulation result, when the color resistance transmittance is 25%, the current density of the normal display area is 4 times that of the translucent display area, so that the difference caused by different pixel densities can be compensated, and the service lives of the normal display area and the translucent display area are consistent.
TABLE 1 simulation results of current densities of a semi-transparent display area and a normal display area under different color resistance transmittances
Wherein jAAIndicating the current density of the normal display area; j is a function ofTARepresenting the current density of the semi-transparent display area;
furthermore, the thickness of the color resistance of the semi-transparent display area TA is 0, while the thickness of the color resistance of the normal display area is larger, and a visual screen splitting phenomenon may occur at a junction position between the semi-transparent display area TA and the normal display area AA due to abrupt changes of the light extraction efficiency and the reflectivity of the sub-pixels. In order to avoid visual screen separation, the thickness of the color resistor gradually decreases along the direction from the normal display area AA to the translucent display area TA at a position where the normal display area AA is adjacent to the translucent display area TA. Therefore, the light emitting efficiency and the reflectivity of the semitransparent display area and the normal display area are gradually changed, and the difference is not easy to be perceived by human eyes, so that visual split screen is avoided.
For the fourth color sub-pixel and the fourth color resistance, the fourth color is any one of the first color, the second color, and the third color. The aperture ratio of the fourth color sub-pixel in the semi-transparent display area is AR1, the efficiency is E1, the aperture ratio of the fourth color sub-pixel in the normal display area is AR2, the efficiency is E2, and the fourth color light-blocking transmittance is T2; the fourth color resists the transmissivity and aperture ratio to meet: 0.9 × L × T2/(AR2 × E2) ≦ L/(AR1 × E1) ≦ 1.1 × L × T2/(AR2 × E2), where L is the luminance of the fourth color subpixel. In the case where the device design of the sub-pixel P is determined, E1 and E2 are known, the aperture ratio AR1 of the translucent display area and the aperture ratio AR2 of the normal display area are also known at the time of design, the transmittance range of the color resistance of the normal display area can be determined according to the above formula, and the thickness range of the color resistance can be determined according to the transmittance of the color resistance. The current density difference of the organic light-emitting display panel designed according to the formula between the semi-transparent display area and the normal display area is within 10%, so that the problem of large service life difference of the sub-pixels can be avoided.
Further, the application also provides an optimal design method of the color resistance thickness, after the color resistance thickness range of the normal display area is determined, the anti-reflection effect in the color resistance thickness range is simulated, and the color resistance thickness with the difference between the reflectivity and the reflectivity of the semi-transparent display area being within 10% is selected as the selectable range of the color resistance thickness design of the normal display area.
In another embodiment of the present application, for the fifth color sub-pixel and the fifth color resistor, the thickness of the fifth color resistor, where the fifth color is any one of the first color, the second color and the third color, in the semi-transparent display area is H3, and the transmittance is T3; the thickness of the fifth color resistance in the normal display area is H4, and the transmittance is T4; for the fifth color sub-pixel and the fifth color resistor, the aperture ratio of the fifth color sub-pixel in the semi-transparent display area is AR3, the efficiency is E3, the aperture ratio of the fifth color sub-pixel in the normal display area is AR4, and the efficiency is E4; the fifth color resists the transmittance and aperture ratio to meet: 0.9 × L × T4(AR4 × E4) ≦ L × T3/(AR3 × E3) ≦ 1.1 × L × T4/(AR4 × E4), where L is the luminance of the fifth color subpixel. In the case where the device design of the sub-pixel P is determined, E3 and E4 are known, the aperture ratio AR3 of the translucent display area and the aperture ratio AR3 of the normal display area are also known at the time of design, the range of the ratio of the color resistance transmittance T3 of the translucent display area to the color resistance transmittance T4 of the normal display area can be determined according to the above formula, and the range of the thickness ratio of the color resistance can be determined according to the range of the transmittance ratio of the color resistance. The current density difference of the organic light-emitting display panel designed according to the formula between the semi-transparent display area and the normal display area is within 10%, so that the problem of large service life difference of the sub-pixels can be avoided.
Further, the application also provides a design method of the color resistance thickness, after the ratio range of the color resistance thickness of the normal display area is determined, the color resistance thicknesses of the plurality of semitransparent display areas TA are determined at first, and the anti-reflection effect in the color resistance range is simulated according to the ratio range of the color resistance thicknesses. And performing the simulation on the color resistance thickness of each determined semi-transparent display area, comprehensively comparing the simulated curves (for example, the x axis of a 3D coordinate is the ratio of the color resistance thickness, the z axis is the reflectivity difference, and the y axis is the scattered point of the semi-transparent display color resistance thickness), and selecting the color resistance thickness with the reflectivity difference of the semi-transparent display area within 10 percent as the selectable range of the design of the color resistance thickness of the normal display area.
Further, the sub-pixel P includes an anode, a light emitting material layer, and a cathode; and the light emitting material layer may include a plurality of hole injection layers, hole transport layers, electron blocking layers, light emitting layers, hole blocking layers, electron transport layers, and resistance injection layers. The thickness, material selection, and doping of the anode, the layer of light-emitting material, and the cathode all affect the light-emitting efficiency. And the process of lowest yield and efficiency in the whole organic light-emitting display panel process engineering when the device of the sub-pixel P is evaporated. Different device designs are adopted in the semi-transparent display area TA and the normal display area AA, so that sub-pixels of the semi-transparent display area and the normal display area need to be evaporated respectively, the flow time is doubled, the efficiency is reduced by half, and the yield is the original square. For example, the original yield is 80%, and if the translucent display area and the normal display area are separately designed, the yield is reduced to 64%. This would cause a huge impact on mass production, and therefore, in order to avoid the reduction of yield and efficiency, for the fourth color sub-pixel or the fifth color sub-pixel, the sub-pixels in the semi-transparent display area TA and the normal display area AA are formed simultaneously in the same process, so that the efficiency of the sub-pixels in the same color in the semi-transparent display area and the normal display area is equal. That is, E1 ═ E2 and/or E3 ═ E4.
Referring to fig. 7, fig. 7 is a schematic view of a display device according to an embodiment of the present application. The application also discloses a display device. The display device of the present application may include the organic light emitting display panel as described above. Including but not limited to cellular phone 1000, tablet computers, displays for applications on smart wearable devices, display devices for applications on vehicles such as automobiles, and the like. As long as the display device includes the organic light emitting display panel included in the display device disclosed in the present application, it is considered to fall within the scope of protection of the present application.
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.
Claims (11)
1. An organic light emitting display panel, comprising:
the display device comprises a semi-transparent display area, a normal display area and a non-display area, wherein the normal display area at least semi-surrounds the semi-transparent display area, and the non-display area surrounds the normal display area and the semi-transparent display area;
the array substrate, the plurality of sub-pixels, the packaging layer and the anti-reflection layer are sequentially arranged, and the sub-pixels are arranged between the array substrate and the packaging layer; the antireflection layer comprises a plurality of color resistors and a black matrix, wherein the color resistors are arranged corresponding to the sub-pixels and cover the sub-pixels;
the sub-pixel density of the semi-transparent display area is smaller than that of the normal display area, and the thickness of the color resistance in the semi-transparent display area is smaller than that of the color resistance in the normal display area.
2. The organic light-emitting display panel according to claim 1,
the sub-pixel comprises an anode, a luminescent material layer and a cathode; a pixel defining layer is arranged on the anode, the pixel defining layer is provided with an opening, the light-emitting material layer covers the opening of the pixel defining layer, and the cathode covers the light-emitting material layer;
the array substrate comprises a driving circuit, and the anode is correspondingly and electrically connected with the driving circuit.
3. The organic light-emitting display panel according to claim 2,
the sub-pixels comprise a first color sub-pixel, a second color sub-pixel and a third color sub-pixel; the color resistors comprise a first color resistor, a second color resistor and a third color resistor; the first color, the second color, and the third color are different from each other;
the first color resistor covers the first sub-pixel, the second color resistor covers the second sub-pixel, and the third color resistor covers the third sub-pixel.
4. The organic light-emitting display panel according to claim 3,
the thicknesses of the first color resistance, the second color resistance and the third color resistance which are positioned in the semitransparent display area are all zero.
5. The organic light-emitting display panel according to claim 4,
for the fourth color sub-pixel and the fourth color resistance, the aperture ratio of the fourth color sub-pixel in the semi-transparent display area is AR1, the efficiency is E1, the aperture ratio of the fourth color sub-pixel in the normal display area is AR2, the efficiency is E2, and the transmittance of the fourth color resistance is T2; the fourth color resists the transmissivity and aperture ratio to meet:
0.9 × L × T2/(AR2 × E2) ≦ L/(AR1 × E1) ≦ 1.1 × L × T2/(AR2 × E2), where L is the luminance of the sub-pixel of the fourth color, and the fourth color is any one of the first color, the second color, and the third color.
6. The organic light-emitting display panel according to claim 3,
for the fifth color sub-pixel and the fifth color resistor, the thickness of the fifth color resistor in the semi-transparent display area is H3, and the transmittance is T3; the thickness of the fifth color resistance in the normal display area is H4, and the transmittance is T4;
for the fifth color sub-pixel and the fifth color resistor, the aperture ratio of the fifth color sub-pixel in the semi-transparent display area is AR3, the efficiency is E3, the aperture ratio of the fifth color sub-pixel in the normal display area is AR4, and the efficiency is E4; the fifth color resists the transmittance and the aperture opening ratio to satisfy:
0.9 × L × T4(AR4 × E4) ≦ L × T3/(AR3 × E3) ≦ 1.1 × L × T4/(AR4 × E4), where L is the luminance of the fifth color sub-pixel, and the fifth color is any one of the first color, the second color, and the third color.
7. The organic light-emitting display panel according to claim 5 or 6,
for the fourth color sub-pixel or the fifth color sub-pixel, E1 ═ E2 and/or E3 ═ E4 are formed simultaneously in the same process in the semi-transparent display area and the normal display area.
8. The organic light-emitting display panel according to claim 3,
the pixel definition layer comprises an opening area and a non-opening area, the non-opening area covers the black matrix in the normal display area, and the black matrix covers the area except the color resistor;
the semi-transparent display area comprises a pixel light emitting area, a wiring area and a light transmitting area; the sub-pixels are positioned in the pixel light emitting areas, the pixel light emitting areas are connected through wiring areas, and the plurality of wiring areas and the pixel light emitting areas surround the light transmitting area;
in the semitransparent display area, the black matrix covers the wiring area, and the black matrix is not overlapped with the light emitting area and the light transmitting area.
9. The organic light-emitting display panel according to claim 3,
the packaging layer is a thin film packaging layer which comprises at least one inorganic layer and at least one organic layer;
an inorganic barrier layer is arranged between the anti-reflection layer and the packaging layer.
10. The organic light-emitting display panel according to claim 9,
an optical transparent adhesive layer is arranged on the anti-reflection layer and is an organic layer.
11. An organic light-emitting display device comprising the organic light-emitting display panel according to any one of claims 1 to 10.
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| CN202210297993.8A CN114823813A (en) | 2019-10-30 | 2019-10-30 | Organic light-emitting display panel and display device |
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| CN111081752B (en) * | 2020-01-06 | 2023-01-10 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN111443518A (en) * | 2020-04-07 | 2020-07-24 | 捷开通讯(深圳)有限公司 | Electronic device and driving method thereof |
| KR20210137856A (en) * | 2020-05-11 | 2021-11-18 | 삼성전자주식회사 | Electronic device including camera and display |
| CN111697039B (en) * | 2020-06-11 | 2023-10-17 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN111640776B (en) * | 2020-06-15 | 2022-07-22 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN114975832A (en) * | 2020-06-29 | 2022-08-30 | 武汉天马微电子有限公司 | Display panel and display device |
| CN111799393B (en) * | 2020-07-20 | 2023-08-25 | 京东方科技集团股份有限公司 | Flexible display panel, manufacturing method thereof and flexible display device |
| CN111969032B (en) * | 2020-08-31 | 2023-08-01 | 上海天马微电子有限公司 | Display panel and display device |
| CN111882995B (en) * | 2020-08-31 | 2022-03-29 | 武汉天马微电子有限公司 | Display panel and display device |
| CN112462553B (en) * | 2020-12-15 | 2022-06-10 | 厦门天马微电子有限公司 | Color film substrate, display panel and display device |
| CN113066831A (en) * | 2021-03-17 | 2021-07-02 | 昆山国显光电有限公司 | Display panel and electronic device |
| CN113113454A (en) * | 2021-03-26 | 2021-07-13 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113109965A (en) * | 2021-04-16 | 2021-07-13 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display panel and liquid crystal display |
| CN113690288B (en) * | 2021-08-24 | 2024-04-26 | 成都京东方光电科技有限公司 | Display substrate, preparation method thereof and display device |
| CN113985645A (en) * | 2021-11-15 | 2022-01-28 | 武汉华星光电技术有限公司 | Display device and on-vehicle monitoring device |
| CN114156323B (en) * | 2021-11-30 | 2023-12-05 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN114284328A (en) * | 2021-12-23 | 2022-04-05 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
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