An organic light-emitting display panel and a display device

Abstract

Embodiments of the present application provide an organic light-emitting display panel and a display device, including: a semi-transparent display area, a normal display area, and a non-display area. 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; an array substrate, a plurality of sub-pixels, a packaging layer, and an anti-reflection layer are sequentially arranged, and the sub-pixels are arranged between the array substrate and the packaging layer; the anti-reflection layer includes a plurality of color filters and a black matrix, the color filters are correspondingly arranged with the sub-pixels and the color filters cover the sub-pixels; the sub-pixel density in the semi-transparent display area is less than the sub-pixel density in the normal display area, and the thickness of the color filter located in the semi-transparent display area is less than the thickness of the color filter located in the normal display area. By using the difference in the thickness of the color filters to cause the difference in the transmittance of the color filters, the difference in the current density between the semi-transparent display area and the normal display area is balanced, and thus the purpose of balancing the lifespan is achieved.

Description

[0001] This application is a divisional application of the application with the application date of October 30, 2019, application number 201911050701.5, and the invention creation name of "an organic light-emitting display panel and a display device".

Technical Field

[0002] The present invention relates to the field of display technology, and in particular, to an organic light-emitting display panel and an organic light-emitting display device.

Background Art

[0003] With the development of display technology, consumers are increasingly looking forward to a true full-screen without "notches", "water droplets" or "round holes". Since there are physical vias in the previous types of full-screens, a true 100% screen-to-body ratio full-screen cannot be achieved. Compared with the first-generation full-screens of the aforementioned types, by setting transparent holes, reducing the pixel density in the transparent holes, and increasing the transmittance, the camera function can be realized while the display function is achieved. It is the second-generation full-screen that can achieve a true 100% screen-to-body ratio.

[0004] However, the pixel density at the transparent holes decreases. If the same brightness as the normal display area is to be achieved, the current density of its sub-pixels is too large, resulting in a fast attenuation of the lifespan of the sub-pixels at the transparent holes. After being used for a period of time, serious brightness reduction and color shift occur, and the requirements of customers for mass-produced products cannot be met. This is also an important factor restricting the emergence of full-screen products with a 100% screen-to-body ratio.

Summary of the Invention

[0005] In view of this, embodiments of the present invention provide an organic light-emitting display panel and a display device including the same to solve the above technical problems.

[0006] On the one hand, the present application provides an organic light-emitting display panel, including: a semi-transparent display area, a normal display area, and a non-display area. 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;

[0007] An array substrate, a plurality of sub-pixels, a packaging layer, and an anti-reflection layer are sequentially arranged. The sub-pixels are arranged between the array substrate and the packaging layer; the anti-reflection layer includes a plurality of color filters and a black matrix. The color filters are correspondingly arranged with the sub-pixels and the color filters cover the sub-pixels;

[0008] The sub-pixel density of the semi-transparent display area is less than the sub-pixel density of the normal display area, and the thickness of the color filter located in the semi-transparent display area is less than the thickness of the color filter located in the normal display area.

[0009] On the other hand, the present application provides a display device including the aforementioned organic light-emitting display panel.

[0010] According to the organic light-emitting display panel and the organic light-emitting display device provided by the present application, this proposal uses color resist and black matrix as an anti-reflection layer to replace the traditional polarizer. The color resist used in the normal display area has a relatively thick thickness, and the color resist used in the semi-transparent display area has a relatively thin thickness. The difference in the transmittance of the color resist is used to balance the difference in the current density between the semi-transparent display area and the normal display area, thereby achieving the purpose of balancing the lifespan.

Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0012] Figure 1 Schematic diagram of an organic light-emitting display panel of the present application;

[0013] Figure 2 It is Figure 1 Partial enlarged schematic diagram of area B of the organic light-emitting display panel;

[0014] Figure 3 It is Figure 1 A cross-sectional schematic diagram of AA' of the organic light-emitting display panel;

[0015] Figure 4 Another cross-sectional schematic diagram of the organic light-emitting display panel of the present application;

[0016] Figure 5 Another cross-sectional schematic diagram of the organic light-emitting display panel of the present application;

[0017] Figure 6 Another cross-sectional schematic diagram of the organic light-emitting display panel of the present application;

[0018] Figure 7 Schematic diagram of an organic light-emitting display device of the present application;

Detailed Embodiments

[0019] In order to better understand the technical solutions of the present invention, the embodiments of the present invention will be described in detail below with reference to the drawings.

[0020] It should be clear that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0021] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a", "said", and "the" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0022] It should be understood that the term "and / or" used herein is merely a description of the association relationship of associated objects, indicating that three 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 " / " herein generally represents an "or" relationship between the associated objects before and after.

[0023] It should be understood that although the terms first, second, third, etc. may be used to describe colors in the embodiments of the present invention, these colors should not be limited to these terms. These terms are only used to distinguish colors from each other. For example, without departing from the scope of the embodiments of the present invention, the first color may also be referred to as the second color, and similarly, the second color may also be referred to as the first color.

[0024] 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; where the luminance L: the luminous flux emitted by the light source per unit surface area and per unit solid angle in the direction perpendicular to its radiation transmission direction, with the unit cd / m 2 ; the current density j: the magnitude of the current per unit area, with the unit mA / cm 2 ; the efficiency E: the magnitude of the luminance generated per unit current, with the unit cd / m 2 ; the definition of the aperture ratio AR: the percentage of the actual light-emitting area of a certain color sub-pixel in the pixel area.

[0025] Through the above formula, it can be deduced that 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 when the light-emitting devices are designed consistently within the display panel, when the luminance is the same in the normal display area and the semi-transparent display area, the smaller the aperture ratio, the greater the current density. And in the semi-transparent display area, the density of sub-pixels is usually only 1 / 2 or even lower than that in the normal display area. Then, according to the above relationship, the current density in the semi-transparent display area is more than twice that in the normal display area. According to the relationship formula between the current density and the lifetime where n represents the acceleration decay coefficient; LT95 represents the time required for the luminance to decay to 95% of the initial luminance; LT95 50 represents the time when the luminance decays to 95% when the current density is 50 mA / cm 2 ; j 50 represents the current density of 50 mA / cm 2According to the above relationship, it can be concluded that the greater the current density, the shorter the lifespan, and as the current density increases, the LT95 of the lifespan will decrease, that is, the lifespan attenuation is more severe. Therefore, the sub-pixels in the semi-transparent display area decay too fast, resulting in the normal attenuation of the brightness in the normal display area after a period of use, while the brightness in the semi-transparent display area decays rapidly, causing an obvious brightness difference between the two display areas. On the other hand, due to the use of different light-emitting materials, there are inherent lifespan differences among the red, green, and blue sub-pixels of the display panel. In the normal display area, since the attenuation rate is slow, this difference will not be overly enlarged, and the color display is relatively normal. In the semi-transparent display area, due to the different attenuation rates of the red, green, and blue colors themselves, and the accelerated attenuation caused by the excessive current density will increase the brightness difference among the red, green, and blue colors, resulting in obvious color deviation in the semi-transparent display area. It is precisely due to this obvious difference in brightness and color between the semi-transparent display area and the normal display area that the semi-transparent display area is easily noticeable and fails to meet the requirements for mass production by customers. This restricts the birth of full-screen products with a 100% screen-to-body ratio.

[0026] The present application provides an organic light-emitting display panel to solve the above technical problems. Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 which is a schematic diagram of an organic light-emitting display panel of the present application; Figure 2 is Figure 1 a partial enlarged schematic diagram of area B of the organic light-emitting display panel; Figure 3 is Figure 1 a cross-sectional schematic diagram of AA' of the organic light-emitting display panel;

[0027] The present application provides an organic light-emitting display panel, including: a semi-transparent display area TA, a normal display area AA, and a non-display area NA. The normal display area AA at least semi-surrounds the semi-transparent display area TA, and the non-display area NA surrounds the normal display area AA and the semi-transparent display area TA; it should be noted that Figure 1Only one side of the translucent display area TA is shown to be closely adjacent to one side of the non-display area NA, and the other three sides of the translucent display area TA are adjacent to the normal display area. For example, the entire translucent display area TA is set within the normal display area AA, with all four sides adjacent to the normal display area; or the translucent display area TA is set in a corner of the display area, where two sides are adjacent to the non-display area NA and the other two sides are adjacent to the normal display area; or the length of the translucent display area TA is greater than or equal to the length of the normal display area, such that three sides of the translucent display area TA are adjacent to the non-display area NA and one side is adjacent to the normal display area; or the translucent display area is circular or of other shapes, as long as there is an adjacent side between the translucent display area TA and the normal display area, which can cause visual coherence, it belongs to the situation where the normal display area AA of the present application at least semi-surrounds the translucent display area TA. The present application does not make special limitations on this.

[0028] Please continue to refer to Figure 2 and Figure 3 , the organic light-emitting display panel of the present application includes an array substrate 100, a plurality of sub-pixels P, a packaging layer 200, and an anti-reflection layer 300 arranged in sequence. The sub-pixels P are arranged between the array substrate 100 and the packaging layer 200; the anti-reflection layer 300 includes a plurality of color filters 310 and a black matrix 320. The color filters 310 are arranged corresponding to the sub-pixels P and the color filters 310 cover the sub-pixels P; in a traditional organic light-emitting display panel, a polarizer is usually used for anti-reflection. The circularly polarized light of ambient light becomes linearly polarized light after passing through the linear polarizer, and then after being reflected by the display panel through a quarter-wave plate and passing through the quarter-wave plate again, the phase angle of its linearly polarized light just differs by 90° from the phase angle of the initial linear polarizer, so that the reflected light cannot exit the display panel, weakening the reflection of the organic light-emitting display panel. However, the present application uses the color filters 310 and the black matrix 320 to achieve anti-reflection. The color filters covering the sub-pixels P can not only play the role of anti-reflection but also filter the spectrum of the sub-pixels, making the spectrum narrower and the color purity higher. The black matrix can completely absorb ambient light, and the color filters can also play the role of anti-reflection. Experimental verification shows that after adding color filters and a black matrix to the array substrate, the reflectivity can be reduced to 6 - 10%. When the thickness of the color filter film increases from 1.6um to 2.6um, the reflectivity decreases from 7.65% to 6.13%, and the white light transmittance decreases by 19.95%. It can be seen that the color filters and the black matrix can completely play the role of anti-reflection.

[0029] In this 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 requirements of the optical sensor device (such as a camera module) for the light transmittance. The sub-pixel P includes an anode, a light-emitting material layer, and a cathode. The light is emitted by the light-emitting material layer and the emission direction is arbitrary, including emitting light towards the cathode and towards the anode. In order to improve the light extraction efficiency, at least one of the cathode and the anode is a reflective electrode. This results in the sub-pixel P being opaque. In addition, in addition to setting the sub-pixel P, a driving circuit for driving the sub-pixel P to emit light is also required. The driving circuit also includes opaque components such as transistors, capacitors, and signal lines, making the light transmittance of the organic light-emitting display panel extremely low at the current conventional pixel density. In order to meet the requirements of the optical sensor module (such as a camera module) for the light transmittance, this application reduces the pixel density of the semi-transparent display area, and the area where pixels are not set becomes a light-transmitting area, increasing the light transmittance of the semi-transparent display area TA. Moreover, the sub-pixels in the semi-transparent display area can still achieve the display function. However, after reducing the pixel density of the semi-transparent display area TA, in order to keep the brightness of the semi-transparent display area TA and the normal display area AA the same, the current density of the semi-transparent display area TA will increase, and the lifespan attenuation will be serious. In this application, the thickness of the color filter 310a located in the semi-transparent display area TA is less than the thickness of the color filter 310b located in the normal display area AA. This increases the light transmittance of the semi-transparent display area TA, while reducing the light extraction efficiency of the normal display area AA. According to the previous formula: This is equivalent to reducing the efficiency E of the normal display area to compensate for the defect of the low aperture ratio in the semi-transparent display area. Specifically, in the semi-transparent display area TA, the aperture ratio AR is low, while the efficiency E is relatively high due to the thin color filter; in the normal display area, the aperture ratio AR is high, while the efficiency E is relatively low due to the thick color filter. In this way, the product of the aperture ratio AR and the efficiency E is similar or even equal in the semi-transparent display area TA and the normal display area AA, so that when the same brightness L is achieved, the current density J is similar or the same, making the lifespan attenuation in the semi-transparent display area TA and the normal display area TA similar, and avoiding the human eye from detecting the existence of the semi-transparent display area. On the other hand, the ingenuity of this application lies in that since the pixel density of the semi-transparent display area TA is low, the area of its reflective electrode and the area of the reflective metal are both smaller than those of the normal display area. Therefore, even if the thickness of the color filter is thin and the transmittance is high, its anti-reflection effect can still be ensured to be equivalent to that of the normal display area AA, and there will be no serious reflection in the semi-transparent display area TA.

[0030] In contrast, according to the anti-reflection principle of the polarizer in the prior art, theoretically, half of the light emitted by the sub-pixels will be filtered out by the linear polarizer; for the traditional polarizer, its transmittance is not controlled by the thickness, and the adjustment of its thickness has little effect on the transmittance, and it is impossible to adjust the transmittance of the semi-transparent display area and the normal display area through the thickness difference of the color resist to make their current densities consistent.

[0031] Further, please continue to refer to Figure 3 , the sub-pixel P includes an anode 151, a light-emitting material layer 152, and a cathode 152; in this application, a top-emitting display panel with a normal structure is taken as an example, the anode is a total reflection electrode, a pixel definition layer 145 is arranged on the anode 151, the pixel definition layer 145 is provided with an opening, the light-emitting material layer 152 covers the opening of the pixel definition layer, and the cathode 152 covers the light-emitting material layer 152; the array substrate 100 includes a driving circuit 500, and the anode 151 is electrically connected to the driving circuit 500 correspondingly. The color resist 310 covers the opening of the pixel definition layer corresponding to the sub-pixel, so that all the light of the sub-pixel can be filtered to ensure consistency.

[0032] The array substrate 100 of this 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 capacitive 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 definition layer 145 arranged on the substrate 110 in sequence; and the pixel definition layer 145 forms an opening, and a light-emitting material layer 152 is formed in the opening of the pixel definition layer; finally, a cathode 153 covering the light-emitting material layer 152 is formed. The encapsulation layer 200 arranged 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-pixel, and prevent water vapor, oxygen or other impurities in the organic layer from penetrating and reacting with the organic light-emitting material to damage the organic light-emitting material and cause the display panel to fail. The organic layer 212 is used to relieve stress and avoid the intrusion of water vapor and oxygen due to the cracking of the inorganic layer under stress. The second inorganic layer 213 is used to prevent water vapor and oxygen in the external environment from entering the front display panel. Moreover, the first inorganic layer 211 and the second inorganic layer 213 form a double protection, increasing the path length and tortuosity of intrusion and reducing the probability of intrusion. The anti-reflection layer 300 of this application is formed on the side of the encapsulation layer 200 away from the sub-pixel. On the one hand, it can play a role in avoiding the intrusion of water vapor and oxygen to a certain extent; on the other hand, it can prevent the processes of forming the color resist and the black matrix from damaging the organic light-emitting device.

[0033] Further, please refer to Figure 5, an inorganic barrier layer is provided between the anti-reflection layer 300 and the encapsulation layer 200. Prior to this, the color filter and the black matrix were used to form a color film substrate and supplied to the liquid crystal display panel as the counter substrate, which was directly disposed on the glass without paying attention to the problem of color leakage. The inorganic barrier layer 600 in this embodiment is an anti-leakage layer, which is provided between the anti-reflection layer 300 and the encapsulation layer 200 to prevent the color of the color filter or the black matrix from leaking into the flexible film encapsulation layer 200 and avoid abnormal display.

[0034] Furthermore, an optical adhesive layer 400 is provided on the anti-reflection layer 300, and the optical adhesive layer 400 is an organic layer. The organic layer has good fluidity, which can compensate for the thickness difference between the semi-transparent display area TA and the normal display area AA caused by the thickness difference of the color filter, making the upper surface of the entire organic light-emitting display panel flat and facilitating the bonding with the protective glass.

[0035] Furthermore, please refer to Figure 4 , Figure 4 which is another cross-sectional schematic diagram of the organic light-emitting display panel of 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 filter includes a first color color filter 311, a second color color filter 312, and a third color color filter 313; the first color, the second color, and the third color are different from each other; the first color color filter 311 covers the first sub-pixel P1, the second color color filter 312 covers the second color sub-pixel P2, and the third color color filter 313 covers the third color sub-pixel P3.

[0036] Furthermore, please continue to refer to Figure 2 and Figure 3 , the pixel defining layer includes an opening area and a non-opening area. In the non-opening area of the normal display area AA, the black matrix 320b is covered, and the black matrix 320b covers the area except the color filter 310b; so that the light of the sub-pixel can be completely filtered to ensure consistency. On the other hand, the black matrix and the color filter are spliced without gaps to avoid light reflection at the gaps. And the width of the black matrix 320b is less than the width of the non-opening area of the pixel defining layer to reserve redundancy for alignment, avoiding the light emitted by the sub-pixel due to misalignment.

[0037] The semi-transparent display area TA includes a pixel light-emitting area E, a wiring area L, and a light-transmitting area T; the sub-pixels P are located in the pixel light-emitting area E, and the pixel light-emitting areas E are connected by the wiring area L. A plurality of wiring areas L and pixel light-emitting areas E surround the light-transmitting area T; in the semi-transparent display area TA, the black matrix 320a covers the wiring area L, and the black matrix 320a does not overlap with the light-emitting area E and the light-transmitting area T. On the one hand, the black matrix 320a does not overlap with the light-emitting area E and the light-transmitting area T, avoiding affecting the light emission uniformity of the sub-pixels, increasing the light-transmitting area, and increasing the overall light transmittance of the semi-transparent display area; on the other hand, the black matrix 320 covers the wiring area L, avoiding diffraction caused by the gaps between the wirings. Most importantly, it avoids the reflection caused by the metal wirings. In the case of a relatively thin color-resist thickness and weak anti-reflection ability, it reduces the reflected light of the semi-transparent display area TA, thereby avoiding the difference in reflectance between the semi-transparent display area TA and the normal display area AA.

[0038] In an embodiment of the present application, please refer to Figure 5 and Figure 6 , Figure 5 which is another cross-sectional schematic diagram of the organic light-emitting display panel of the present application; Figure 6 which is another cross-sectional schematic diagram of the organic light-emitting display panel of the present application;

[0039] The thicknesses of the first color resist 311, the second color resist 312, and the third color resist 313 located in the semi-transparent display area TA are all 0. In this way, the efficiency E value of the sub-pixels in the semi-transparent display area TA will not be affected by the color resist and will be the maximum value. The product of the aperture ratio and the efficiency is the maximum value in theory. The efficiency that the normal display area AA needs to reduce to maintain the same product will be relatively small, making the overall power consumption of the display panel relatively small. At the same time, according to the formula: When the product of the aperture ratio AR and the efficiency E is the maximum value, the current density j is the minimum value, and the life attenuation of the organic light-emitting display panel is also the weakest.

[0040] Taking the pixel density of the semi-transparent display area TA as 1 / 4 of that of the normal display area AA as an example, that is to say, the aperture ratio AR of the semi-transparent display area TA is only 1 / 4 of that of the normal display area. Then, when the light brightness of the semi-transparent display area is the same as 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 designed transmittance of the color resist is 20-50%. Since there is no color resist in the semi-transparent display area TA in this embodiment, based on the following simulation results, when the transmittance of the color resist is 25%, the current density of the normal display area is 4 times that of the semi-transparent display area. In this way, the difference caused by different pixel densities can be compensated, and the life of the normal display area and the semi-transparent display area can be made consistent.

[0041] Table 1 Simulation results of current density in the semi-transparent display area and the normal display area under different color-resist transmittances

[0042]

[0043]

[0044] where j AA represents the current density of the normal display area; j TA represents the current density of the semi-transparent display area;

[0045] Furthermore, the thickness of the color resistor in the semi-transparent display area TA is 0, while the thickness of the color resistor in the normal display area is relatively large. At the junction of the semi-transparent display area TA and the normal display area AA, a visual split screen phenomenon may occur due to the sudden change in the light extraction efficiency and reflectivity of the sub-pixels. To avoid the visual split screen, at the position where the normal display area AA is adjacent to the semi-transparent display area TA, the thickness of the color resistor gradually decreases along the direction from the normal display area AA to the semi-transparent display area TA. This makes the light extraction efficiency and reflectivity in both the semi-transparent display area and the normal display area change gradually, and the human eye is not easily aware of the difference, thus avoiding the visual split screen.

[0046] For the fourth color sub-pixel and the fourth color resistor, 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, and the efficiency is E1. The aperture ratio of the fourth color sub-pixel in the normal display area is AR2, and the efficiency is E2. The transmittance of the fourth color resistor is T2; the transmittance of the fourth color resistor and the aperture ratio satisfy: 0.9*L*T2 / (AR2*E2) ≤ L / (AR1*E1) ≤ 1.1*L*T2 / (AR2*E2), where L is the brightness of the fourth color sub-pixel. When the device design of the sub-pixel P is determined, E1 and E2 are known, and the aperture ratio AR1 in the semi-transparent display area and the aperture ratio AR2 in the normal display area are also known during design. According to the above formula, the transmittance range of the color resistor in the normal display area can be determined, and the thickness range of the color resistor can be determined according to the transmittance of the color resistor. The organic light-emitting display panel designed according to this formula has a current density difference of less than 10% between the semi-transparent display area and the normal display area, which can avoid the problem of large differences in sub-pixel lifetimes.

[0047] Furthermore, the present application also provides an optimal design method for the thickness of the color resistor. After determining the thickness range of the color resistor in the normal display area, simulate the anti-reflection effect within this thickness range of the color resistor, and select the thickness of the color resistor with a reflectivity difference of less than 10% from the reflectivity of the semi-transparent display area as the optional range for the design of the thickness of the color resistor in the normal display area.

[0048] In another embodiment of the present application, for the fifth color sub-pixel and the fifth color filter, the fifth color is any one of the first color, the second color, and the third color. The thickness of the fifth color filter located in the semi-transmissive display area is H3, and the transmittance is T3; the thickness of the fifth color filter located in the normal display area is H4, and the transmittance is T4; for the fifth color sub-pixel and the fifth color filter, the aperture ratio of the fifth color sub-pixel located in the semi-transmissive display area is AR3, and the efficiency is E3, and the aperture ratio of the fifth color sub-pixel located in the normal display area is AR4, and the efficiency is E4; the transmittance and aperture ratio of the fifth color filter 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. When the device design of the sub-pixel P is determined, E3 and E4 are known, and the aperture ratio AR3 of the semi-transmissive display area and the aperture ratio AR3 of the normal display area are also known during design. According to the above formula, the ratio range of the transmittance T3 of the color filter in the semi-transmissive display area and the transmittance T4 of the color filter in the normal display area can be determined, and the ratio range of the thickness of the color filter can be determined according to the ratio range of the transmittance of the color filter. The organic light-emitting display panel designed according to this formula has a current density difference within 10% between the semi-transmissive display area and the normal display area, which can avoid the problem of large differences in the sub-pixel lifetimes.

[0049] Further, the present application also provides a method for designing the thickness of the color filter. After determining the ratio range of the thickness of the color filter in the normal display area, first determine the thicknesses of the color filters in several semi-transmissive display areas TA, and simulate the anti-reflection effect within the range of the color filter according to the ratio range of the thickness of the color filter. The above simulation is performed for the thickness of the color filter in each determined semi-transmissive display area, and the simulated curves are comprehensively compared (for example, the x-axis of the 3D coordinate is the ratio of the color filter thickness, the z-axis is the reflectivity difference, and the y-axis is the scatter of the semi-transmissive display color filter thickness). Select the color filter thickness with a reflectivity difference within 10% from the reflectivity of the semi-transmissive display area as the optional range for designing the color filter thickness in the normal display area.

[0050] Further, the sub-pixel P includes an anode, a light-emitting material layer, and a cathode; and the light-emitting material layer may include multiple layers among a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, and a resistance injection layer. The thickness, material selection, and doping of the anode, the light-emitting material layer, and the cathode will all affect the light-emitting efficiency. The device evaporation of the sub-pixel P is the process with the lowest yield and efficiency in the entire organic light-emitting display panel process engineering. When different device designs are adopted in the semi-transparent display area TA and the normal display area AA, it is necessary to evaporate the sub-pixels of the semi-transparent display area and the normal display area separately, which doubles the process time, reduces the efficiency by half, and the yield is the square of the original. For example, if the original yield is 80%, if the semi-transparent display area and the normal display area are designed separately, the yield will be reduced to 64%. This will cause a huge blow to mass production. Therefore, in order to avoid the reduction of yield and efficiency, for the fourth-color sub-pixel or the fifth-color sub-pixel, they are formed simultaneously in the same process in the semi-transparent display area TA and the normal display area AA, so that the efficiency of the same-color sub-pixels in the semi-transparent area and the normal display area is equal. That is, E1 = E2 and / or E3 = E4.

[0051] Please refer to Figure 7 , Figure 7 which is a schematic diagram of a display device according to an embodiment of the present application. The present 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 mobile phones 1000, tablet computers, computer monitors, displays applied to smart wearable devices, display devices applied to vehicles such as automobiles, and so on. 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 protection scope of the present application.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An organic light-emitting display panel, characterized in that, Comprising: A semi-transparent display area and a normal display area, wherein the normal display area at least semi-surrounds the semi-transparent display area; It further includes an array substrate, a plurality of sub-pixels and an anti-reflection layer, and the sub-pixels are arranged between the array substrate and the anti-reflection layer; the anti-reflection layer includes a plurality of color resistors, and the color resistors are arranged corresponding to the sub-pixels; The thickness of the color resistors located in the semi-transparent display area is less than the thickness of the color resistors located in the normal display area; The semi-transparent display area and the normal display area have similar or the same current density at the same light brightness.

2. The organic light-emitting display panel according to claim 1, characterized in that, The sub-pixel density of the semi-transparent display area is less than the sub-pixel density of the normal display area.

3. The organic light-emitting display panel according to claim 1, characterized in that, The aperture ratio of the semi-transparent display area is less than the aperture ratio of the normal display area.

4. The organic light-emitting display panel according to claim 1, characterized in that, The sub-pixel includes an anode, a light-emitting material layer and a cathode; a pixel definition layer is arranged on the anode, the pixel definition layer is provided with an opening, the light-emitting material layer covers the opening of the pixel definition layer, and the cathode covers the light-emitting material layer; The array substrate includes a driving circuit, and the anode is electrically connected to the driving circuit correspondingly.

5. The organic light-emitting display panel according to claim 1, characterized in that, The sub-pixel includes a first-color sub-pixel, a second-color sub-pixel and a third-color sub-pixel; the color resistors include a first-color color resistor, a second-color color resistor and a third-color color resistor; the first color, the second color and the third color are different from each other; The first-color color resistor covers the first-color sub-pixel, the second-color color resistor covers the second-color sub-pixel, and the third-color color resistor covers the third-color sub-pixel.

6. The organic light-emitting display panel according to claim 5, characterized in that, The thicknesses of the first-color color resistor, the second-color color resistor and the third-color color resistor located in the semi-transparent display area are all zero.

7. The organic light-emitting display panel according to claim 6, characterized in that, At a position where the normal display area is adjacent to the semi-transparent display area, the thickness of the color resistors gradually decreases along the direction from the normal display area to the semi-transparent display area.

8. The organic light-emitting display panel according to claim 5, characterized in that, For a fourth-color sub-pixel and a fourth-color color resistor, the aperture ratio of the fourth-color sub-pixel located in the semi-transparent display area is AR1, the efficiency is E1, and the transmittance of the fourth-color color resistor is T1; the aperture ratio of the fourth-color sub-pixel located in the normal display area is AR2, the efficiency is E2, and the transmittance of the fourth-color color resistor is T2; the transmittance of the fourth-color color resistor and the aperture ratio satisfy: 0.9*L*T2 / (AR2*E2)≤L*T1 / (AR1*E1)≤1.1*L*T2 / (AR2*E2), where L is the brightness of the fourth-color sub-pixel, and the fourth color is any one of the first color, the second color and the third color.

9. The organic light-emitting display panel according to claim 5, characterized in that, For the fifth color sub-pixel and the fifth color filter, the thickness of the fifth color filter located in the semi-transmissive display area is H3, and the transmittance is T3; the thickness of the fifth color filter located in the normal display area is H4, and the transmittance is T4; For the fifth color sub-pixel and the fifth color filter, the aperture ratio of the fifth color sub-pixel located in the semi-transmissive display area is AR3, and the efficiency is E3. The aperture ratio of the fifth color sub-pixel located in the normal display area is AR4, and the efficiency is E4; the transmittance and aperture ratio of the fifth color filter 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.

10. The organic light-emitting display panel according to claim 8 or 9, wherein For the fourth color sub-pixel or the fifth color sub-pixel, they are formed in the same process in the semi-transmissive display area and the normal display area, and E1 = E2 and / or E3 = E4.

11. The organic light-emitting display panel according to claim 4, wherein The pixel defining layer includes an opening area and a non-opening area. The anti-reflection layer further includes a black matrix. In the normal display area, the non-opening area covers the black matrix, and the black matrix covers the area other than the color filter; The semi-transmissive display area includes a pixel light-emitting area, a wiring area, and a light-transmissive area; the sub-pixels are located in the pixel light-emitting area, and the pixel light-emitting areas are connected by the wiring area. A plurality of the wiring areas and the pixel light-emitting areas surround the light-transmissive area; In the semi-transmissive display area, the black matrix covers the wiring area, and the black matrix does not overlap with the light-emitting area and the light-transmissive area.

12. The organic light-emitting display panel according to claim 1, wherein It further includes a packaging layer disposed between the sub-pixel and the anti-reflection layer. The packaging layer is a thin-film packaging layer, and the thin-film packaging layer includes at least one inorganic layer and at least one organic layer; An inorganic barrier layer is disposed between the anti-reflection layer and the packaging layer.

13. The organic light-emitting display panel according to claim 1, wherein An optically transparent adhesive layer is disposed on the anti-reflection layer, and the optically transparent adhesive layer is an organic layer.

14. The organic light-emitting display panel according to claim 13, wherein The optically transparent adhesive layer covers the semi-transmissive display area and the normal display area, making the surface of the entire organic light-emitting display panel flat.

15. An organic light-emitting display device, characterized in that, An organic light-emitting display panel including any one of claims 1 to 14.

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