Display panel and display device

Abstract

This application discloses a display panel and a display device. 【Solution means】The display panel includes a substrate and a light-shielding layer. The light-shielding layer includes a first light-shielding unit, a second light-shielding unit, and a third light-shielding unit. The outlines of the orthographic projections of the first light-shielding unit, the second light-shielding unit, and the third light-shielding unit on the substrate all have a shape with curved sides. The outline sizes of the orthographic projections of the first light-shielding unit, the second light-shielding unit, and the third light-shielding unit on the substrate decrease sequentially. The difference between the outline size of the orthographic projection of the second light-shielding unit on the substrate and the average value of the outline sizes of the orthographic projections of the first light-shielding unit and the third light-shielding unit on the substrate is not more than a preset value.

Description

Technical Field

[0001] This application claims priority to Chinese Patent Application No. 202210961536.4, titled "Display Panel and Display Device", filed on August 11, 2022, and Chinese Patent Application No. 202211509545.6, titled "Display Panel and Display Device", filed on November 29, 2022. All the contents of the above applications are incorporated herein by reference.

[0002] This application belongs to the technical field of electronic products, and particularly relates to a display panel and a display device.

Background Art

[0003] With the development of display technology, people not only require a smooth usage experience for the electronic products they use, but also have increasingly high requirements for the visual experience. A high screen occupation ratio has become the current research direction. For electronic products, the installation of optical elements such as front cameras inevitably occupies a certain space, thereby affecting the screen occupation ratio. In order to improve the screen occupation ratio and achieve a full screen, researchers are considering the implementation form of under-screen optical elements.

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the prior art, generally, an optical element such as a camera is installed below the display panel. However, since there is generally a light-shielding structure on the display panel, diffraction is likely to occur when light passes through the display panel and reaches the optical element, which has a great impact on the normal operation of the optical element.

[0005] Therefore, new display panels and display devices are required.

Means for Solving the Problems

[0006] By making the difference between the contour size of the orthographic projection on the substrate of the second light-shielding unit and the average value of the contour sizes of the orthographic projections on the substrates of the first light-shielding unit and the third light-shielding unit not exceed a preset value, the present application provides a display panel and a display device that can adjust the diffraction phenomenon of external light in the first light-shielding unit, the second light-shielding unit, and the third light-shielding unit, improve the influence of diffraction on the operation of the optical element, and further improve the operation effect of the optical element.

[0007] In a first aspect, an embodiment of the present application is a display panel having a display area and a non-display area, wherein the display area includes a first sub-pixel area, a second sub-pixel area, and a third sub-pixel area having different emission colors, and the display panel includes a substrate, a first light-shielding unit provided on one side of the substrate and located in the first sub-pixel area, a second light-shielding unit located in the second sub-pixel area, and a third light-shielding unit located in the third sub-pixel area, and a light-shielding layer. Here, the contours of the orthographic projections of the first light-shielding unit, the second light-shielding unit, and the third light-shielding unit on the substrate are all figures having curved sides, the contour sizes of the orthographic projections of the first light-shielding unit, the second light-shielding unit, and the third light-shielding unit on the substrate decrease sequentially, and the difference between the contour size of the orthographic projection of the second light-shielding unit on the substrate and the average value of the contour sizes of the orthographic projections of the first light-shielding unit and the third light-shielding unit on the substrate does not exceed a preset value.

[0008] In a second aspect, an embodiment of the present application provides a display device including the display panel in any of the above embodiments.

Advantages of the Invention

[0009] Compared with the prior art, the display panel according to the embodiment of the present application includes a light-shielding layer. The first light-shielding unit of the light-shielding layer is located in the first sub-pixel region, the second light-shielding unit is located in the second sub-pixel region, and the third light-shielding unit is located in the third sub-pixel region. The first light-shielding unit, the second light-shielding unit, and the third light-shielding unit do not transmit light, and the regularity of the arrangement is strong, similar to the lattice structure in the optical structure. Furthermore, it affects the light rays entering the optical element from the outside and causes diffraction problems. To improve the above problems, through the research of the inventor, the first light-shielding unit, the second light-shielding unit, and the third light-shielding unit are installed in a shape with arc-shaped sides, and the difference between the contour size of the orthographic projection of the second light-shielding unit on the substrate and the average value of the contour sizes of the orthographic projections of the first light-shielding unit and the third light-shielding unit on the substrate is made not more than a preset value. That is, when the contour size of the orthographic projection of the second light-shielding unit on the substrate is close to the average value of the contour sizes of the orthographic projections of the first light-shielding unit and the third light-shielding unit on the substrate, the diffraction phenomenon of external light in the first light-shielding unit, the second light-shielding unit, and the third light-shielding unit is adjusted, the influence of diffraction on the operation of the optical element is improved, and furthermore, it is discovered that the operation effect of the optical element can be improved.

Brief Description of the Drawings

[0010]

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Embodiments for Carrying Out the Invention

[0011] Hereinafter, the present application will be described in more detail with reference to the drawings and specific embodiments.

[0012] When describing the structure of a member, if one layer or one region is located "above" or "on top of" another layer or another region, it may be directly located on top of another layer or another region, or may further include another layer or region between another layer or another region. And when the member is inverted, the one layer or one region will be located "below" or "beneath" another layer or another region.

[0013] Hereinafter, with reference to FIGS. 1 to 13, each embodiment of the display panel and the display device will be described.

[0014] The display panel according to the embodiment of the present application may be an organic light-emitting diode (abbreviated as OLED) display panel, a quantum dot light-emitting diode (abbreviated as QLED), or a micro-planar display panel (Micro-OLED or Micro-LED), etc. Hereinafter, the case where the display panel is an OLED display panel will be described as an example.

[0015] Referring to FIGS. 1 to 3, the display panel according to the embodiment of the present application has a display area AA and a non-display area NA. The display area AA includes a first sub-pixel area X1, a second sub-pixel area X2, and a third sub-pixel area X3 with different emission colors. The display panel includes a substrate 1 and a light-shielding layer provided on one side of the substrate 1. The light-shielding layer includes a first light-shielding unit Z1, a second light-shielding unit Z2, and a third light-shielding unit Z3. The first light-shielding unit Z1 is located in the first sub-pixel area X1, the second light-shielding unit Z2 is located in the second sub-pixel area X2, and the third light-shielding unit Z3 is located in the third sub-pixel area X3. The outlines of the orthographic projections of the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 on the substrate 1 all have a shape with curved sides. The outline sizes of the orthographic projections of the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 on the substrate 1 decrease sequentially, and the difference between the outline size of the orthographic projection of the second light-shielding unit Z2 on the substrate 1 and the average value of the outline sizes of the orthographic projections of the first light-shielding unit Z1 and the third light-shielding unit Z3 on the substrate 1 is not more than a preset value.

[0016] The display panel according to the embodiment of the present application includes a substrate 1 and a light-shielding layer. Since the first light-shielding unit Z1 of the light-shielding layer is located in the first sub-pixel region X1, the second light-shielding unit Z2 is located in the second sub-pixel region X2, and the third light-shielding unit Z3 is located in the third sub-pixel region X3, the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 do not transmit light, and the regularity of the arrangement is strong, similar to the lattice structure in the optical structure, which further affects the light rays entering the optical element from the outside and causes diffraction problems. In order to improve the above problems, through the research of the inventor, the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 are installed in a shape with an arc-shaped side, and the difference between the contour size of the orthographic projection of the second light-shielding unit Z2 on the substrate 1 and the average value of the contour sizes of the orthographic projections of the first light-shielding unit Z1 and the third light-shielding unit Z3 on the substrate 1 is not more than a preset value, that is, the contour size of the orthographic projection of the second light-shielding unit Z2 on the substrate 1 is close to the average value of the contour sizes of the orthographic projections of the first light-shielding unit Z1 and the third light-shielding unit Z3 on the substrate 1, so as to adjust the diffraction phenomenon of external light in the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3, improve the influence of diffraction on the operation of the optical element, and further improve the operation effect of the optical element.

[0017] In this embodiment, the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 may include other structures with low light transmittance or non-light-transmitting structures presenting periodic patterns such as anodes, organic layers, and inorganic layers. When external light passes through the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3, corresponding diffraction patterns are generated according to the outer edge shapes of the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3. When adjusting the contour size of the orthographic projection of the substrate 1 of the second light-shielding unit Z2, the relative distances between the second light-shielding unit Z2 and the first light-shielding unit Z1 and the third light-shielding unit Z3 also change relatively, and the change in the relative distance also changes the diffraction effect. According to the inventor's experiments, when the contour size of the orthographic projection of the substrate 1 of the second light-shielding unit Z2 is adjusted to be close to the average value of the contour sizes of the orthographic projections of the substrates 1 of the first light-shielding unit Z1 and the third light-shielding unit Z3, the diffraction light intensity converges the most, the distribution of the emitted light rays after diffraction becomes more uniform, the moiré phenomenon becomes weaker, and the diffraction problem of the display panel is significantly improved.

[0018] Specifically, the contour size is the graphic size formed by the outer edge contour of the orthographic projection of the substrates 1 of the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3.

[0019] Optionally, the display area AA includes an adjacent first display area AA1 and a second display area AA2. The light transmittance of the first display area AA1 is greater than that of the second display area AA2, and the light-shielding layer is provided at least in the first display area AA1.

[0020] The first display area AA1 is a light-transmitting area for installing optical elements such as cameras and fingerprint recognition elements. It can be seen that the light transmittance of the first display area AA1 is greater than that of the second display area AA2 so that the corresponding optical elements can receive sufficient incident light to ensure their imaging effects.

[0021] In some selectable embodiments, the preset value is 2 μm or less, and it can be seen that the contour dimension of the orthographic projection on the substrate 1 of the second light-shielding unit Z2 needs to be within the range obtained by adding / subtracting 2 μm to / from the average value of the contour dimensions of the orthographic projections on the substrate 1 of the first light-shielding unit Z1 and the third light-shielding unit Z3.

[0022] When the contour size of the orthographic projection on the substrate 1 of the second light-shielding unit Z2 is equal to the average value of the contour sizes of the orthographic projections on the substrate 1 of the first light-shielding unit Z1 and the third light-shielding unit Z3, it can be seen that the improvement effect on the diffraction problem is the most significant. However, considering the influence of factors such as manufacturing errors and process accuracy, if the difference between the contour dimension of the orthographic projection on the substrate 1 of the second light-shielding unit Z2 and the average value of the contour dimensions of the orthographic projections on the substrate 1 of the first light-shielding unit Z1 and the third light-shielding unit Z3 is within 2 μm, it can also play a role in improving the diffraction problem. For example, the preset value may be equal to numerical values such as 0.5 μm, 1 μm, 1.5 μm, 2 μm, etc., and is not particularly limited. Generally, the smaller the preset value, the better the problem of light transmission unevenness due to the light diffraction problem can be avoided.

[0023] To facilitate manufacturing, only the maximum contour dimension of the orthographic projection on the substrate 1 of the second light-shielding unit Z2 needs to be adjusted so that it is equal to the average value of the maximum contour dimensions of the orthographic projections on the substrate 1 of the first light-shielding unit Z1 and the third light-shielding unit Z3.

[0024] As shown in FIG. 3, the maximum contour size of the orthographic projection on the substrate 1 of the first light-shielding unit Z1 is a, the maximum contour size of the orthographic projection on the substrate 1 of the second light-shielding unit Z2 is b, the maximum contour size of the orthographic projection on the substrate 1 of the third light-shielding unit Z3 is c, and the preset value is the result of subtracting b from the average value of a and c.

[0025] Referring to FIG. 2, in some selectable embodiments, the display panel further includes a pixel definition layer 2, the pixel definition layer 2 is provided on one side of the substrate 1, the pixel definition layer 2 includes a first pixel aperture K1, a second pixel aperture K2, and a third pixel aperture K3, at least a part of the orthographic projection of the first light shielding unit Z1 in the pixel definition layer 2 is located within the first pixel aperture K1, at least a part of the orthographic projection of the second light shielding unit Z2 in the pixel definition layer 2 is located within the second pixel aperture K2, and at least a part of the orthographic projection of the third light shielding unit Z3 in the pixel definition layer 2 is located within the third pixel aperture K3.

[0026] Note that the size of the first sub-pixel region X1 may correspond to the size of the first pixel aperture K1, the size of the second sub-pixel region X2 may correspond to the size of the second pixel aperture K2, and the size of the third sub-pixel region X3 may correspond to the size of the third pixel aperture K3. In the embodiments of the present application, when reducing diffraction by adjusting the sizes of the first light shielding unit Z1, the second light shielding unit Z2, and the third light shielding unit Z3, the first pixel aperture K1, the second pixel aperture K2, and the third pixel aperture K3 can maintain their original sizes, that is, by maintaining the aperture ratio of the display panel as it is, it can be ensured that the display effect of the display panel is not affected. That at least a part of the orthographic projection of the first light shielding unit Z1 in the pixel definition layer 2 is located within the first pixel aperture K1 only represents the positional relationship between the orthographic projection of the first light shielding unit Z1 and the first pixel aperture K1, and does not represent that the first light shielding unit Z1 is located within the first pixel aperture K1.

[0027] In this embodiment, the material of the pixel definition layer 2 may be hexamethyldisiloxane, epoxy resin, or polyimide (PI), or other silicon-based adhesive materials with a light transmittance of 90% or more, or other organic adhesive materials with a slightly lower light transmittance (greater than 80%) and a slightly higher bending strength, but the present embodiment is not limited thereto.

[0028] Optionally, as shown in FIG. 2, the display panel further includes an anode layer Y, and at least a part of the anode layer Y is also used as a light-shielding layer. As can be understood, in addition to the anode layer Y, the display panel further includes display panel functional layers such as a light-emitting material layer 3, a cathode layer 4, a metal wiring, a pixel circuit element, and a substrate, and the light transmittance of the materials used for these display panel functional layers is relatively high.

[0029] In this embodiment, the anode layer Y is also provided corresponding to the pixel opening of the pixel defining layer 2, and since the light transmittance is low, at least a part of the anode layer Y is also used as a light-shielding layer, and the diffraction problem can be improved by adjusting the size of the anode layer Y.

[0030] Optionally, the material of the anode layer Y is generally a material with a high work function in order to improve the hole injection efficiency. For example, it may be a single-layer film layer such as gold (Au), platinum (Pt), titanium (Ti), silver (Ag), or a composite structure layer such as an indium tin oxide-silver-indium tin oxide film layer may also be used. The material of the cathode layer 4 generally employs a material with a low work function for the convenience of electron injection, and can also reduce the amount of heat generated during operation and extend the service life of the OLED device. The material of the cathode layer 4 may be one type of metal material such as silver, aluminum, lithium, magnesium (Mg), ytterbium (Yb), calcium (Ca), or indium (In), or may be an alloy of the above metal materials such as a magnesium-silver alloy (Mg / Ag) or a lithium-aluminum alloy (Li / Al). Since the light transmittance of the material used for the cathode layer 4 is high and the cathode layer 4 is usually provided over the entire layer, the cathode layer 4 has no influence on diffraction.

[0031] Referring to FIG. 2, in some alternative embodiments, the anode layer Y includes a first sub-electrode Y1, a second sub-electrode Y2, and a third sub-electrode Y3. The first sub-electrode Y1 also serves as the first light-shielding unit Z1, the second sub-electrode Y2 also serves as the second light-shielding unit Z2, and the third sub-electrode Y3 also serves as the third light-shielding unit Z3. The first sub-electrode Y1, the second sub-electrode Y2, and the third sub-electrode Y3 are all reflective electrodes.

[0032] In this embodiment, in order to achieve the light-shielding effect, the first sub-electrode Y1, the second sub-electrode Y2, and the third sub-electrode Y3 can all be made of an opaque metal. The first sub-electrode Y1 can be easily used as the first light-shielding unit Z1, the second sub-electrode Y2 can be easily used as the second light-shielding unit Z2, and the third sub-electrode Y3 can be easily used as the third light-shielding unit Z3. In this embodiment, the first sub-electrode Y1, the second sub-electrode Y2, and the third sub-electrode Y3 are all reflective electrodes. That is, the anode layer Y may have a single-layer structure including only one light-shieldable electrode layer, or the entire anode layer Y may also serve as a light-shielding layer.

[0033] Referring to FIG. 4, in some other alternative embodiments, the anode layer Y includes a reflective electrode layer Y4, and the reflective electrode layer Y4 also serves as a light-shielding layer. In this embodiment, in order to ensure the signal transmission effect of the anode layer Y, in addition to the reflective electrode layer Y4, the anode layer Y may further include other film layers. For example, the anode layer Y may further include at least one light-transmissive electrode layer Y5. Specifically, the light-transmissive electrode layer Y5 is made of indium tin oxide material and has a high light transmittance.

[0034] Optionally, the anode layer Y includes two light-transmissive electrode layers Y5, and the two light-transmissive electrode layers Y5 are respectively provided on both sides of the reflective electrode layer Y4. For example, indium tin oxide can be used for the light-transmissive electrode layer Y5. The reflective electrode layer Y4 may use silver, and the anode layer Y includes an indium tin oxide-silver-indium tin oxide composite film layer structure.

[0035] In addition to the form in which the above-described anode layer Y also serves as a light-shielding layer, a light-shielding layer may be provided separately. Referring to FIG. 5, specifically, the light-shielding layer is provided between the anode layer Y and the substrate 1.

[0036] In this embodiment, the light-shielding layer can be manufactured by an additional process. For example, the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 of the light-shielding layer all include at least one of a black adhesive layer, ink, and metal. Alternatively, in order to reduce costs, a part originally located between the anode layer Y and the substrate 1 and manufactured using a light-shielding material may also be used as the light-shielding layer.

[0037] For example, the display panel further includes a pixel circuit electrically connected to the anode layer Y. The pixel circuit includes a thin-film transistor TFT and a signal line. The thin-film transistor TFT includes an active layer J, a gate G, a source S, and a drain D. The materials of the drain D, the source S, and the gate G may include one or a combination of multiple types such as molybdenum, titanium, aluminum, and copper. The gate G of the thin-film transistor TFT generally receives a control signal and turns the thin-film transistor TFT on or off based on the control of the control signal. One of the source S and the drain D of the thin-film transistor TFT is connected to the anode layer Y.

[0038] Since some signal lines or the gate G, the source S, and the drain D of the pixel circuit are manufactured from an opaque metal, the opaque film layer of this part can be partially used as the light-shielding layer to reduce costs.

[0039] Referring to FIG. 6, in some alternative embodiments, the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 each include at least two sub-light-shielding portions M. At least two of the sub-light-shielding portions M in the first light-shielding unit Z1 are provided in different layers, at least two of the sub-light-shielding portions M in the second light-shielding unit Z2 are provided in different layers, and at least two of the sub-light-shielding portions M in the third light-shielding unit Z3 are provided in different layers. The above provision can be carried out for one, two, or three of the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3.

[0040] In this embodiment, the first light-shielding unit Z1 may be formed by at least two sub-light-shielding portions M. Among the sub-light-shielding portions M forming the first light-shielding unit Z1, it can be seen that at least two of the sub-light-shielding portions M are provided in different layers so as to reasonably utilize the space of each layer and facilitate installation.

[0041] Note that the shape formed by connecting the orthographic projections of each sub-light-shielding portion M of the first light-shielding unit Z1 on the substrate 1 is, in short, the orthographic projection shape of the substrate 1 of the first light-shielding unit Z1. Similarly, the shapes formed by connecting the orthographic projections of each sub-light-shielding portion M of the second light-shielding unit Z2 and the third light-shielding unit Z3 on the substrate 1 are, respectively, the orthographic projection shapes of the substrates 1 of the second light-shielding unit Z2 and the third light-shielding unit Z3 that are required. For example, one sub-light-shielding portion M of the first light-shielding unit Z1 may be provided in the same layer as the source, and the other sub-light-shielding portion M may be provided in the same layer as the gate or the active layer, as long as each sub-light-shielding portion M can be connected to form the required shape of the first light-shielding unit Z1.

[0042] In some alternative embodiments, the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 are all similar figures.

[0043] Similar figures specifically refer to the fact that the shapes of the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 are the same. For example, the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 may all be circular, and the three only differ in radius. Or, the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 may all be elliptical. The second light-shielding unit Z2 can obtain the first light-shielding unit Z1 and the third light-shielding unit Z3 by expanding or shrinking in the same proportion. That is, the ratio of the minor axis to the major axis of the elliptical first light-shielding unit Z1, second light-shielding unit Z2, and third light-shielding unit Z3 is fixed.

[0044] Specifically, the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 may specifically be circular or substantially circular. As measured by the inventor through experiments, when the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 are specifically circular or substantially circular, by limiting the contour size of the orthographic projection of the second light-shielding unit Z2 on the substrate 1 to be near the average value of the contour sizes of the orthographic projections of the first light-shielding unit Z1 and the third light-shielding unit Z3 on the substrate 1, the improvement effect on the diffraction problem is remarkable.

[0045] Referring to FIG. 3, in some selectable embodiments, the orthographic projections of the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 on the substrate 1 are all circular, and the difference between the diameter of the second light-shielding unit Z2 and the average value of the diameters of the first light-shielding unit Z1 and the third light-shielding unit Z3 is 2 μm or less.

[0046] As a result of measurement by the inventor through experiments, when the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 are all circular, the generated diffraction pattern is similar to concentric circles. The closer the diameter of the second light-shielding unit Z2 is adjusted to be to the average value of the diameters of the first light-shielding unit Z1 and the third light-shielding unit Z3, the more the diffracted light converges to the center of the diffraction pattern, and the problem of the divergence of the diffracted light is effectively improved.

[0047] The difference between the diameter of the second light-shielding unit Z2 and the average value of the diameters of the first light-shielding unit Z1 and the third light-shielding unit Z3 is 2 μm or less, that is, the difference between the radius of the second light-shielding unit Z2 and the average value of the radii of the first light-shielding unit Z1 and the third light-shielding unit Z3 is 1 μm or less. For example, when the radius of the first light-shielding unit Z1 is 10.1 μm and the radius of the third light-shielding unit Z3 is 7.3 μm, since the average value of the radii of the first light-shielding unit Z1 and the third light-shielding unit Z3 is 8.7 μm, the radius of the second light-shielding unit Z2 needs to be between 8.6 μm and 8.8 μm.

[0048] As a result of measurement by the inventor through experiments, the technical solution according to the embodiment of the present application can achieve the effect of improving the diffraction problem for different pixel array structures. Referring to FIGS. 7 to 12, taking the case where the orthographic projections of the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 on the substrate 1 are circular as an example, the radius of the first light-shielding unit Z1 is fixed at 10.1 μm, the radius of the third light-shielding unit Z3 is fixed at 7.3 μm, and the radius of the second light-shielding unit Z2 is changed between 7.4 μm and 10.2 μm to conduct a simulation experiment. The diffraction effect of the second sub-pixel region X2 corresponding to the second light-shielding unit Z2 is as shown in FIGS. 8, 10, and 12. As can be seen from the figures, when the radius of the second light-shielding unit Z2 is between 8.6 μm and 9.0 μm, the diffraction light intensity converges the most and the diffraction effect is the best. The intermediate value between 8.6 μm and 9.0 μm is 8.8 μm, and the average value of the radius 10.1 μm of the first light-shielding unit Z1 and the radius 7.3 μm of the third light-shielding unit Z3 is 8.7 μm, which is exactly within the range between 8.6 μm and 9.0 μm, further meaning that the technical solution of the embodiment of the present invention can effectively improve the diffraction problem.

[0049] As can be seen from the diffraction effect diagram obtained by the above simulation experiment, a technical solution in which the difference between the maximum contour size of the orthographic projection on the substrate 1 of the second light-shielding unit Z2 according to the present application and the average value of the maximum contour sizes of the orthographic projections on the substrates 1 of the first light-shielding unit Z1 and the third light-shielding unit Z3 is equal to or less than a preset value can be applied to different pixel array structures.

[0050] Optionally, the maximum contour size of the second light-shielding unit Z2 can be made equal to the average value of the maximum contour sizes of the first light-shielding unit Z1 and the third light-shielding unit Z3 to ensure the improvement effect on the diffraction problem. For example, when the radius of the first light-shielding unit Z1 is 10.1 μm and the radius of the third light-shielding unit Z3 is 7.3 μm, the radius of the second light-shielding unit Z2 may be equal to 8.7 μm.

[0051] Referring to FIG. 13, optionally, the orthographic projections on the substrate 1 of the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 may adopt other shapes in addition to being circular. For example, the orthographic projections on the substrate 1 of the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 are all elliptical, and the difference between the major axis length of the second light-shielding unit Z2 and the average value of the major axis lengths of the first light-shielding unit Z1 and the third light-shielding unit Z3 is 2 μm or less, and / or the difference between the minor axis length of the second light-shielding unit Z2 and the average value of the minor axis lengths of the first light-shielding unit Z1 and the third light-shielding unit Z3 is 1 μm or less.

[0052] Since the major axis length of the ellipse is greater than the minor axis length, the difference between the major axis length of the second light-shielding unit Z2 and the average value of the major axis lengths of the first light-shielding unit Z1 and the third light-shielding unit Z3 also correspondingly is greater than the difference between the minor axis length of the second light-shielding unit Z2 and the average value of the minor axis lengths of the first light-shielding unit Z1 and the third light-shielding unit Z3, ensuring the adjustment of the uniformity of the influence of the major axis length and minor axis length of the first light-shielding unit Z1 on the diffraction problem. Of course, in addition to circular and elliptical shapes, the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 may also be in other substantially circular shapes, such as a quadrilateral with all four corners rounded, etc., and are not particularly limited.

[0053] The embodiment of the present application further provides a display device including the display panel in any of the above embodiments.

[0054] Optionally, the display area AA of the display panel includes an adjacent first display area AA1 and a second display area AA2, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, and the display device further includes an optical element provided corresponding to the first display area AA1.

[0055] Specifically, the optical element may be an element that has certain requirements for light rays, such as a camera, a fingerprint recognition element, etc.

[0056] By installing the first light-shielding unit Z1, the second light-shielding unit Z2, and the third light-shielding unit Z3 in a shape with an arcuate side, and ensuring that the difference between the maximum contour size of the orthographic projection of the substrate 1 of the second light-shielding unit Z2 and the average value of the maximum contour sizes of the orthographic projections of the substrates 1 of the first light-shielding unit Z1 and the third light-shielding unit Z3 is less than or equal to a preset value, the diffraction effect of external light in the first display area AA1 can be adjusted, the diffraction problem can be improved, and the operating effect of the optical element can be further enhanced.

[0057] The display device according to the embodiments of the present application has the technical effects of the technical solution of the display panel in any of the above embodiments, and the same or corresponding configurations and interpretations of terms as those in the above embodiments will not be described here.

[0058] The display device according to the embodiments of the present application may be applied to a mobile phone, or any electronic product with a display function, including a television, a laptop computer, a desktop display panel, a tablet computer, a digital camera, a smart bracelet, smart glasses, an in-vehicle display panel, a medical device, an industrial control device, a touch interaction terminal, etc., but the embodiments of the present application are not particularly limited thereto.

Claims

1. A display panel having a display area and a non-display area, wherein the display area includes a first sub-pixel area, a second sub-pixel area, and a third sub-pixel area having different emission colors, the display panel includes: a substrate, a light-shielding layer provided on one side of the substrate, the light-shielding layer including a first light-shielding unit located in the first sub-pixel area, a second light-shielding unit located in the second sub-pixel area, and a third light-shielding unit located in the third sub-pixel area, the outlines of the orthographic projections of the first light-shielding unit, the second light-shielding unit, and the third light-shielding unit on the substrate all have a shape with curved sides, the outline sizes of the orthographic projections of the first light-shielding unit, the second light-shielding unit, and the third light-shielding unit on the substrate decrease sequentially, and the difference between the outline size of the orthographic projection of the second light-shielding unit on the substrate and the average value of the outline sizes of the orthographic projections of the first light-shielding unit and the third light-shielding unit on the substrate is not more than a preset value, a display panel.

2. The preset value is not more than 2 μm, The display panel according to Claim 1.

3. The maximum outline size of the orthographic projection of the second light-shielding unit on the substrate is equal to the average value of the maximum outline sizes of the orthographic projections of the first light-shielding unit and the third light-shielding unit on the substrate, The display panel according to Claim 1.

4. further comprising a pixel definition layer provided on one side of the substrate, the pixel definition layer including a first pixel opening, a second pixel opening, and a third pixel opening, at least a part of the orthographic projection of the first light-shielding unit on the pixel definition layer is located within the first pixel opening, at least a part of the orthographic projection of the second light-shielding unit on the pixel definition layer is located within the second pixel opening, and at least a part of the orthographic projection of the third light-shielding unit on the pixel definition layer is located within the third pixel opening, The display panel according to Claim 1.

5. further comprising an anode layer, and at least a part of the anode layer is also used as the light-shielding layer, The display panel according to Claim 4.

6. The anode layer includes a first sub - electrode, a second sub - electrode, and a third sub - electrode. The first sub - electrode is also used as the first light - shielding unit, the second sub - electrode is also used as the second light - shielding unit, and the third sub - electrode is also used as the third light - shielding unit. The first sub - electrode, the second sub - electrode, and the third sub - electrode are all reflective electrodes. The display panel according to claim 5.

7. The anode layer includes a reflective electrode layer, and the reflective electrode layer is also used as the light - shielding layer. The display panel according to claim 5.

8. The anode layer further includes at least one layer of light - transmissive electrode layer. The display panel according to claim 7.

9. The anode layer includes two layers of the light - transmissive electrode layers, and the two layers of the light - transmissive electrode layers are respectively provided on both sides of the reflective electrode layer. The display panel according to claim 8.

10. Further comprising an anode layer, The light - shielding layer is provided between the anode layer and the substrate. The display panel according to claim 4.

11. The light - shielding layer is located between the anode layer and the substrate. The first light - shielding unit, the second light - shielding unit, and the third light - shielding unit all include at least one of a black adhesive layer, ink, and metal. The display panel according to claim 10.

12. The first light - shielding unit, the second light - shielding unit, and the third light - shielding unit each include at least two sub - light - shielding parts. At least two of the sub - light - shielding parts in the first light - shielding unit are provided in different layers, and / or At least two of the sub - light - shielding parts in the second light - shielding unit are provided in different layers, and / or At least two of the sub - light - shielding parts in the third light - shielding unit are provided in different layers. The display panel according to claim 1.

13. The orthographic projections of the first light - shielding unit, the second light - shielding unit, and the third light - shielding unit on the substrate are all similar figures. The display panel according to claim 1.

14. The orthographic projections of the first light - shielding unit, the second light - shielding unit, and the third light - shielding unit on the substrate are all circular, The difference between the diameter of the second light - shielding unit and the average value of the diameters of the first light - shielding unit and the third light - shielding unit is 2 μm or less. The display panel according to claim 1.

15. The orthographic projections of the first light-shielding unit, the second light-shielding unit, and the third light-shielding unit on the substrate are all elliptical. The display panel according to Claim 1.

16. The difference between the major axis length of the second light-shielding unit and the average value of the major axis lengths of the first light-shielding unit and the third light-shielding unit is 2 μm or less. The display panel according to Claim 15.

17. The difference between the minor axis length of the second light-shielding unit and the average value of the minor axis lengths of the first light-shielding unit and the third light-shielding unit is 1 μm or less. The display panel according to Claim 15.

18. The display area includes an adjacent first display area and a second display area. The light transmittance of the first display area is greater than that of the second display area. The light-shielding layer is provided at least in the first display area. The display panel according to Claim 1.

19. Comprising the display panel according to any one of Claims 1 to 18. Display device.

20. The display area of the display panel includes an adjacent first display area and a second display area. The light transmittance of the first display area is greater than that of the second display area. The display device further includes an optical element provided corresponding to the first display area. The display device according to Claim 19.

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