Display panel and display device

Abstract

The utility model provides a display panel and a display device. The display panel comprises: a substrate; the sub-pixels are arranged on the substrate and comprise a first sub-pixel, a second sub-pixel and a third sub-pixel; the lens layer is located on the side, away from the substrate, of the sub-pixel, the lens layer comprises a first lens and a second lens which are arranged at an interval, and the orthographic projection of the first lens on the substrate is overlapped with the orthographic projection area of the pixel opening of the first sub-pixel and the orthographic projection area of the pixel opening of the second sub-pixel on the substrate at the same time; the orthographic projection of the second lens on the substrate is overlapped with the orthographic projection of the pixel opening of the third sub-pixel on the substrate. According to the display panel, the light emitting brightness between different pixels can be balanced, the Gamma yield and the brightness display uniformity of the display panel can be improved, the display effect of the display panel is further improved, and the yield and the product competitiveness of the display panel are improved.

Description

TECHNICAL FIELD

[0001] The utility model generally relates to display technical field, concretely relates to a display panel and display device. BACKGROUND

[0002] Micro OLED (Micro OLED) display can realize higher pixel density, and is widely applied in various near-eye displays. However, in the related art, due to the structure setting for pixel partition in the micro OLED, there is a large difference in light emission between RGB pixels, thereby causing the problems of low uniformity of the display panel and low Gamma yield. SUMMARY

[0003] In view of the above defects or deficiencies in the prior art, it is desirable to provide a display panel and display device that can balance the light emission brightness between different pixels, which is beneficial to improve the Gamma yield and brightness display uniformity of the display panel, thereby improving the display effect of the display panel and improving the yield and product competitiveness of the display panel.

[0004] In a first aspect, the utility model provides a kind of display panel, comprising:

[0005] Substrate;

[0006] Subpixel arranged on substrate, subpixel includes first subpixel, second subpixel and third subpixel;

[0007] Lens layer, lens layer is located at the side of subpixel away from substrate, lens layer includes first lens and second lens arranged at intervals, the orthographic projection of first lens on substrate is overlapped with the orthographic projection area of the pixel opening of first subpixel and the pixel opening of second subpixel on substrate, the orthographic projection of second lens on substrate is overlapped with the orthographic projection of the pixel opening of third subpixel on substrate, and lens layer is used to converge the emergent light of subpixel.

[0008] As optional scheme, the light collection ability of first lens is less than the light collection ability of second lens.

[0009] As optional scheme, the curvature of first lens is less than the curvature of second lens.

[0010] As optional scheme, the arch height of first lens is less than or equal to the arch height of second lens.

[0011] As optional scheme, the arch height of first lens is 1.0 μm-1.6 μm, and the arch height of second lens is 1.6 μm-2.5 μm.

[0012] As optional scheme, the refractive index of first lens is less than the refractive index of second lens.

[0013] As an optional solution, the first lens on the substrate Orthogonal projection and the first sub-pixel pixel opening on the substrate Orthogonal projection of the intersection area is the first overlap area, the first lens on the substrate Orthogonal projection and the second sub-pixel pixel opening on the substrate Orthogonal projection of the intersection area is the second overlap area, the first overlap area and the second overlap area The area is the same or different.

[0014] As an optional solution, the third sub-pixel pixel opening on the substrate Orthogonal projection is located within the second lens on the substrate Orthogonal projection area.

[0015] As an optional solution, the first sub-pixel pixel opening and the second sub-pixel pixel opening on the substrate Orthogonal projection area encloses the first lens on the substrate Orthogonal projection.

[0016] As an optional solution, the distance between the first lens on the substrate Orthogonal projection and the second lens on the substrate Orthogonal projection is greater than or equal to 0.3 μm and less than or equal to 2 μm.

[0017] As an optional solution, the third sub-pixel is a blue sub-pixel, the first sub-pixel is a red sub-pixel, and the second sub-pixel is a green sub-pixel.

[0018] Alternatively, the third sub-pixel is a blue sub-pixel, the first sub-pixel is a green sub-pixel, and the second sub-pixel is a red sub-pixel.

[0019] As an optional solution, the display panel further comprises a bonding adhesive layer, the bonding adhesive layer is located on the side of the lens layer away from the substrate, and the refractive index of the bonding adhesive layer is less than the refractive index of the lens layer.

[0020] As an optional solution, the difference between the refractive index of the lens layer and the refractive index of the bonding adhesive layer is less than or equal to 2.

[0021] In a second aspect, the utility model provides a kind of display device, comprising the display panel of first aspect.

[0022] The utility model discloses a display panel, through setting up the lens layer on the one side of the sub -pixel away from the substrate, the lens layer includes first lens and second lens, the first lens is overlapped with the pixel opening of first sub -pixel and the pixel opening of second sub -pixel on the substrate on the orthographic projection of substrate, and the orthographic projection of second lens on the substrate is overlapped with the pixel opening of third sub -pixel on the substrate. BRIEF DESCRIPTION OF DRAWINGS

[0023] Other features, objects, and advantages of the application will become more apparent from the following detailed description when read in conjunction with the accompanying drawings:

[0024] Figure 1 It is display panel partition structure puncture structure schematic diagram in the prior art;

[0025] Figure 2 It is a structure schematic diagram of a display panel of the embodiment of the application;

[0026] Figure 3 It is the front structure schematic diagram of lens layer and sub -pixel in a display panel of the embodiment of the application;

[0027] Figure 4 It is the emergent light ray gain schematic diagram of a display panel of the embodiment of the application;

[0028] Figure 5 It is the structure schematic diagram of another display panel of the embodiment of the application;

[0029] Figure 6 It is the structure schematic diagram of still another display panel of the embodiment of the application;

[0030] Figure 7 It is the structure schematic diagram of still another display panel of the embodiment of the application;

[0031] Figure 8 A lens topography for hot embossing;

[0032] Figure 9 A lens topography for dry etching;

[0033] Figure 10 An overlapping diagram of a normal projection of a lens layer and a normal projection of a pixel opening of a sub-pixel in a display panel according to an embodiment of the present application;

[0034] Figure 11 A front structure diagram of a lens layer and a sub-pixel in another display panel according to an embodiment of the present application;

[0035] Figure 12 An overlapping diagram of a normal projection of a lens layer and a normal projection of a pixel opening of a sub-pixel in another display panel according to an embodiment of the present application;

[0036] Figure 13 A front structure diagram of a lens layer and a sub-pixel in another display panel according to an embodiment of the present application;

[0037] Figure 14 An overlapping diagram of a normal projection of a lens layer and a normal projection of a pixel opening of a sub-pixel in another display panel according to an embodiment of the present application;

[0038] Figure 15 A structure diagram of another display panel according to an embodiment of the present application;

[0039] In the drawings,

[0040] 1, partition structure;

[0041] 10, substrate, 11, pixel definition layer, 12, anode layer, 13, light-emitting layer, 14, cathode layer, 15, encapsulation layer, 16, light filter layer, 17, planarization layer;

[0042] 21, first sub-pixel, 22, second sub-pixel, 23, third sub-pixel;

[0043] 30, lens layer, 31, first lens, 32, second lens;

[0044] 40, adhesive layer. DETAILED DESCRIPTION

[0045] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and are not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings.

[0046] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0047] In the related art, due to the fact that a silicon-based micro OLED (Micro-OLED) cannot make separate RGB single-color devices like Side by Side (SBS) single-color devices of a mobile phone OLED panel, a silicon-based OLED micro display can only use white light devices. Generally, a silicon-based micro OLED display uses a single light-emitting layer device structure to achieve white light emission. The light-emitting layer architecture uses a combination of multiple different light-emitting materials to achieve white light. The module brightness is generally in the range of 80-600 nits, which belongs to a medium-low brightness display. If a high brightness (greater than 1000 nits) is used in the single layer structure, the power consumption and service life will be sacrificed. In order to improve the performance, brightness, and service life of the silicon-based micro OLED display, a tandem OLED device with two or more light-emitting layers is introduced. A charge generation layer (CGL) is introduced to connect the upper and lower two light-emitting units, so as to achieve the effect of light-emitting superposition on the device, and successfully improve the important photoelectric performance indicators such as current efficiency, output brightness, and operating life.

[0048] Full-color display is achieved by using the above-mentioned RGB three-color color gel. However, the current color gel transmittance is only 20%+, and especially the transmittance of blue color gel is often less than 20%. Therefore, when preparing an OLED device, it is necessary to preferentially improve the efficiency of blue light. Moreover, after the module is manufactured, during the electrical debugging, the RGB needs to be Gamma debugged, and different current densities are given to the RGB pixels to ensure that the final synthesized white light color point is around (0.31, 0.33). As mentioned above, the relatively weak blue light needs to be given more current, which increases the load of the blue light unit during use, so that the service life of the blue light is less than that of the red light and the green light, thereby affecting the overall service life of the module, and also causing the composition of the red light and the green light to increase during use, so that the picture gradually turns yellow, affecting the display effect. On the other hand, the silicon-based micro OLED display uses a partition structure (such as but not limited to Tall Fence (TF), Dig on wafer (DOW), and Undercut) to partition the OLED film layer to form independent pixels. For example, Figure 1As shown, the partition structure 1 using the pixel inter-digging (DOW) partitions the pixels while also changing the appearance of the upper cathode layer 14, and the cathode layer 14 is recessed to form puncture points A1 and A2, wherein the distance d1 of the puncture A1 from the anode layer 12 is less than the distance d2 (about 0.7 times) between the cathode layer 14 directly above and the anode layer 12, which causes the lateral resistance to be smaller than the positive direction, and the current is more likely to flow from the side to the cathode layer 14. For the double-layer OLED device, the blue light unit is above the red and green light units, and it is more susceptible to the influence of the cathode layer puncture than the red and green light units, forming a leakage path, causing the blue light emission efficiency to decrease, and the light emission difference between the RGB pixels is further widened, the product uniformity is low, and the Gamma yield is low.

[0049] Based on the above problems, in a first aspect, embodiments of the present application provide a display panel, such as Figure 2 、 3 and 4, comprising:

[0050] a substrate 10;

[0051] a sub-pixel disposed on the substrate 10, the sub-pixel including a first sub-pixel 21, a second sub-pixel 22, and a third sub-pixel 23;

[0052] a lens layer 30, the lens layer 30 being located on a side of the sub-pixel away from the substrate 10, the lens layer 30 including a first lens 31 and a second lens 32 disposed at intervals, the first lens 31 having a normal projection on the substrate 10 that overlaps a normal projection area of a pixel opening of the first sub-pixel 21 and a pixel opening of the second sub-pixel 22 on the substrate 10, the second lens 32 having a normal projection on the substrate 10 that overlaps a normal projection of a pixel opening of the third sub-pixel 23 on the substrate 10, the lens layer being configured to converge light rays emitted by the sub-pixel.

[0053] It should be noted that the substrate 10 can be understood as a backplane of the display panel, and the substrate 10 can be a silicon substrate 10, wherein the silicon substrate 10 can include a silicon substrate, and a driving layer, a display layer, and a cover plate, etc. stacked in a direction away from the silicon substrate.

[0054] The driving layer can include a plurality of pixel driving circuits arranged in an array. The pixel driving circuit can include electronic elements such as transistors and capacitors. For example, the pixel driving circuit can include three transistors and one capacitor, forming a 3T1C (i.e., one driving transistor, two switching transistors, and one capacitor). It can also include more than three transistors and at least one capacitor, such as 4T1C (i.e., one driving transistor, three switching transistors, and one capacitor), 5T1C (i.e., one driving transistor, four switching transistors, and one capacitor), or 7T1C (i.e., one driving transistor, six switching transistors, and one capacitor), etc. The transistors can be thin film transistors (TFTs).

[0055] It can be understood that a thin film transistor can include a control electrode, a first electrode, and a second electrode. The control electrode is the gate electrode of the thin film transistor, the first electrode is one of the source electrode and the drain electrode of the thin film transistor, and the second electrode is the other of the source electrode and the drain electrode of the thin film transistor.

[0056] In some embodiments, the driving layer can include an active layer, a first gate metal layer (Gate1), a second gate metal layer (Gate2), a first metal trace layer (SD1), and a second metal trace layer (SD2), which are configured to form the thin film transistors, capacitors, and a plurality of signal lines for pixel driving in the pixel driving circuit. For example, the plurality of signal lines can include power signal lines, data signal lines, reset signal lines, scan signal lines, and enable signal lines, and initialization signal lines, etc. The driving layer can also include an insulating layer that separates these film layers.

[0057] The display layer can include a light emitting device layer and an encapsulation layer 15. The light emitting device layer is stacked on the side of the driving layer away from the silicon substrate. The light emitting device layer can include a pixel definition layer 11 and a plurality of light emitting devices. The pixel definition layer 11 has a plurality of pixel openings, one pixel opening defines the position of one light emitting device to form one sub-pixel. Each sub-pixel includes a first sub-pixel 21, a second sub-pixel 22 and a third sub-pixel 23, each of which is one of a red sub-pixel, a blue sub-pixel and a green sub-pixel, respectively. The light emitting device can be an OLED light emitting device or a QLED light emitting device, for example. Taking an OLED light emitting device as an example, in the direction away from the substrate 10, the light emitting device can include a first electrode, a light emitting layer 13 and a second electrode stacked in turn. Of course, the light emitting device can also include at least one of a hole injection layer, a hole transport layer, an electron blocking layer disposed between the first electrode and the light emitting layer 13, at least one of an electron injection layer, an electron transport layer, a hole blocking layer disposed between the second electrode and the light emitting layer 13; in some embodiments, the first electrode can be an anode layer 12, and the second electrode can be a cathode layer 14. The structure of the anode layer 12 can be a composite structure composed of a transparent conductive oxide film / metal film / transparent conductive oxide film stacked in turn. The material of the transparent conductive oxide film is, for example, any one of ITO (Indium tin oxide) and IZO (Indium zinc oxide), and the material of the metal film is, for example, any one of gold (Au), silver (Ag), nickel (Ni) and platinum (Pt). For another example, the structure of the anode layer 12 can also be a single-layer structure, and the material of the single-layer structure can be any one of ITO, IZO, Au, Ag, Ni and Pt. Each pixel opening exposes a part of the anode layer 12 of the corresponding light emitting device, and at least a part of the light emitting layer 13 is located in the corresponding pixel opening and forms an electrical connection with the corresponding anode layer 12. For example, the cathode layer 14 of each light emitting device can be electrically connected to each other to form an integrated structure. For example, the material of the cathode layer 14 can be any one of aluminum (Al), silver (Ag) and magnesium (Mg), or any one of magnesium-silver alloy and aluminum-lithium alloy.

[0058] A packaging layer 15 is disposed on the side of the light emitting device layer distal to the silicon substrate to protect the light emitting device. The packaging layer 15 can include a first inorganic packaging layer, an organic packaging layer, and a second inorganic packaging layer. For example, the first and second inorganic packaging layers can be made of inorganic materials such as nitride, oxide, oxynitride, nitrate, carbide, or any combination thereof, and can be prepared using a chemical vapor deposition (CVD) process, such as a plasma enhanced chemical vapor deposition (PECVD) process. For example, the organic insulating layer can be made of materials such as acrylic, hexamethyldisiloxane, polyacrylate, polycarbonate, polystyrene, etc., and can be prepared using an ink jet printing (IJP) process.

[0059] In some embodiments, the display layer further includes a filter layer 16 disposed on the side of the packaging layer 15 distal to the silicon substrate. The filter layer 16 can include a first color filter unit, a second color filter unit, and a third color filter unit. The first, second, and third color filter units are color filter units of different colors. The first, second, and third color filter units can have different thicknesses or the same thickness, or two of them have the same thickness and the other has a different thickness.

[0060] In some embodiments, the display panel further includes a planarization layer 17 disposed on the side of the filter layer 16 distal to the substrate 10.

[0061] It can be understood that the lens layer 30 is located on the side of the sub-pixel away from the substrate 10, and the lens layer 30 is used for reliably improving the light output intensity of the display panel through the deflection and light condensation effect of the lens on the light; wherein, the interval arrangement of the first lens 31 and the second lens 32 means that the edges of the first lens 31 and the second lens 32 adjacent to each other do not contact, which is conducive to reliably improving the light output brightness of the corresponding color sub-pixel. Since the display panel includes a plurality of sub-pixels, the corresponding first lens 31 includes a plurality of, and the second lens 32 includes a plurality of; wherein, the orthographic projection of the first lens 31 on the substrate 10 overlaps the orthographic projection of the pixel opening of the first sub-pixel 21 and the pixel opening of the second sub-pixel 22 on the substrate 10, which means that the first sub-pixel 21 and the second sub-pixel 22 share the first lens 31, and the first lens 31 simultaneously realizes light output gain for the first sub-pixel 21 and the second sub-pixel 22; the orthographic projection of the second lens 32 on the substrate 10 overlaps the orthographic projection of the pixel opening of the third sub-pixel 23 on the substrate 10, which means that the second lens 32 is only used to realize light output gain for the third sub-pixel 23. Wherein, the overlap can be complete coincidence or partial area coincidence.

[0062] For example, the center of the first lens 31 is aligned with the center of the region formed by the pixel opening of the first sub-pixel 21 and the pixel opening of the second sub-pixel 22, which is conducive to ensuring that the light output gain of the first sub-pixel 21 and the second sub-pixel 22 is close; the center of the second lens 32 is aligned with the center of the pixel opening of the third sub-pixel 23, which is conducive to ensuring that the light output gain area of the third sub-pixel 23 and the light intensity core area of the third sub-pixel 23 itself coincide, and the third sub-pixel 23 realizes the maximum gain.

[0063] It can also be understood that in the embodiments of the present application, the first lens 31 simultaneously gains the first sub-pixel 21 and the second sub-pixel 22, so that the light output gain area is offset relative to the original light intensity core area of the first sub-pixel 21 and the original light intensity core area of the second sub-pixel 22, and the light output gain area of the third sub-pixel 23 by the second lens 32 is basically coincided with the original light intensity core area of the third sub-pixel 23. Therefore, the arrangement of the lens layer 30 is conducive to compensating for the light output brightness difference between the pixels due to the arrangement of the partition structure, balancing the light output brightness, effectively improving the brightness uniformity and Gamma yield, and making the display panel have good display effect.

[0064] For example, when the first sub-pixel 21 is a red sub-pixel, the second sub-pixel 22 is a green sub-pixel, and the third sub-pixel 23 is a blue sub-pixel, the first lens 31 simultaneously realizes light output gain for the red sub-pixel and the green sub-pixel, and the second lens 32 realizes light output gain for the blue sub-pixel. The gain of the red sub-pixel and the green sub-pixel is less than the gain of the blue sub-pixel, so it is conducive to adjusting the current distribution between RGB pixels to be more balanced, reducing the load of the blue sub-pixel, and increasing the life of the blue sub-pixel;

[0065] For example, when the first sub-pixel 21 is a blue sub-pixel, the second sub-pixel 22 is a green sub-pixel, and the third sub-pixel 23 is a red sub-pixel, the first lens 31 simultaneously increases the light emission gain of the blue sub-pixel and the green sub-pixel, and the second lens 32 increases the light emission gain of the red sub-pixel, and the gain of the blue sub-pixel and the green sub-pixel is less than the gain of the red sub-pixel. Therefore, the light emission brightness of the red sub-pixel can be improved, the display panel can realize the display effect of warm color tone, and the user demand can be better met.

[0066] In the actual product processing process, the corresponding colors of the first sub-pixel 21, the second sub-pixel 22, and the third sub-pixel 23 are set according to the actual product demand.

[0067] The display panel of the embodiment of the present application solves the problem of poor light emission brightness uniformity of the existing display panel. The display panel of the embodiment of the present application sets the lens layer 30 on the side of the sub-pixel away from the substrate 10, the lens layer 30 includes the first lens 31 and the second lens 32, the orthographic projection of the first lens 31 on the substrate 10 overlaps the orthographic projection area of the pixel opening of the first sub-pixel 21 and the pixel opening of the second sub-pixel 22 on the substrate 10, and the orthographic projection of the second lens 32 on the substrate 10 overlaps the orthographic projection of the pixel opening of the third sub-pixel 23 on the substrate 10. In this way, since the first lens 31 simultaneously covers the first sub-pixel 21 and the second sub-pixel 22, and the first lens 31 has the light condensing and deflection effect, the pixel gain area of the first sub-pixel 21 and the second sub-pixel 22 after passing through the lens is deflected to the area close to the center of the entire area of the first sub-pixel 21 and the second sub-pixel 22, which deviates from the light intensity core area (i.e., the pixel center light emission area) of the first sub-pixel 21 and the second sub-pixel 21 itself, so that the light emission gain of the first sub-pixel 21 and the second sub-pixel 22 is appropriately weakened; the light condensing and deflection effect of the second lens 32 makes the light rays in the edge area of the third sub-pixel 23 deflected to the center, so that the pixel gain area of the third sub-pixel 23 substantially coincides with the light intensity core area (i.e., the pixel center light emission area) of the third sub-pixel 23 itself, and then the pixel gain of the third sub-pixel 23 is strengthened, which is conducive to compensating for the brightness difference caused by the partition structure, effectively improving the brightness uniformity and Gamma yield, and making the display panel have good display effect and improve the yield of the display panel and the product competitiveness.

[0068] As a realizable manner, the light condensing capability of the first lens 31 is less than the light condensing capability of the second lens 32.

[0069] The light condensing capability can refer to the condensing effect of light rays.

[0070] In this embodiment, the focusing effect of the first lens 31 on the light emitted by the first sub-pixel 21 and the second sub-pixel 22 is less than the focusing effect of the second lens 32 on the light emitted by the third sub-pixel 23. That is, the brightness gain capability of the first lens 31 on the first sub-pixel 21 and the second sub-pixel 22 is less than the brightness gain capability of the second lens 32 on the third sub-pixel 23. This is beneficial for compensating for the brightness differences between different color sub-pixels caused by the partition structure, improving brightness uniformity; and it is also beneficial for balancing current distribution, reducing the load on the third sub-pixel 23, and increasing its lifespan.

[0071] Specifically, in some embodiments, the curvature of the first lens 31 is less than the curvature of the second lens 32.

[0072] In this embodiment, it is beneficial to further improve the light output brightness of the third sub-pixel 23 by the second lens 32, and weaken the light output brightness gain of the first sub-pixel 21 and the second sub-pixel 22 by the first lens 31, thereby reliably compensating for the difference in light output brightness caused by the partition structure setting, and improving the Gamma yield and brightness uniformity.

[0073] In other embodiments, such as Figure 5 As shown, the arch height h1 of the first lens 31 is less than or equal to the arch height h2 of the second lens 32.

[0074] In this embodiment, by setting the arch height of the first lens 31 to be less than or equal to the arch height of the second lens 32, the focusing gain of the first lens 31 is less than the focusing gain of the second lens 32. Thus, the first lens 31 is located on the light-emitting side of the first sub-pixel 21 and the second sub-pixel 22, and the second lens 32 is located on the light-emitting side of the third sub-pixel 23. This can reliably compensate for the brightness difference caused by the partition structure, thereby improving the uniformity of the emitted brightness.

[0075] In a preferred embodiment, the arch height of the first lens 31 is 1.0μm-1.6μm, and the arch height of the second lens 32 is 1.6μm-2.5μm.

[0076] Specifically, the arch height of the first lens 31 may be, but is not limited to, 1.0μm, 1.2μm, 1.4μm or 1.6μm, etc.; the arch height of the second lens 32 may be, but is not limited to, 1.6μm, 1.8μm, 2.0μm, 2.2μm or 2.5μm, etc.

[0077] The arch height of the first lens 31 in this embodiment is conducive to achieving a brightness gain of about 1.5 times for the first sub-pixel 21 and the second sub-pixel 22, and the arch height of the second lens 32 is conducive to achieving a brightness gain of about 1.6 times to 1.65 times for the third sub-pixel 23.

[0078] As a realizable manner, the refractive index of the first lens 31 is less than the refractive index of the second lens 32.

[0079] In the embodiment, the refractive index of the first lens 31 is less than the refractive index of the second lens 32, which means that the light condensing capability of the first lens 31 is less than the light condensing capability of the second lens 32, that is, the light gain capability of the first lens 31 to the first sub-pixel 21 and the second sub-pixel 22 is less than the light gain capability of the second lens 32 to the third sub-pixel 23, which is conducive to compensating for the luminance difference between different color sub-pixels caused by the partition structure and improving the luminance uniformity; and is also conducive to balancing the current distribution, reducing the load of the third sub-pixel 23, and increasing the service life thereof.

[0080] In some embodiments, as shown in Figure 6 the material of the first lens 31 includes propylene glycol methyl ether acetate, acrylic resin, photosensitizer, and dioxane;

[0081] the material of the second lens 32 includes propylene glycol methyl ether acetate, phenolic resin, polyhydroxystyrene derivative, and photoacid generator;

[0082] In a preferred embodiment, according to the mass percentage, the material of the first lens 31 includes 50% to 80% of propylene glycol methyl ether acetate, 5% to 45% of acrylic resin, 1% to 15% of photosensitizer, and 0.5% to 1% of dioxane;

[0083] According to the mass percentage, the material of the second lens 32 includes 50% to 80% of propylene glycol methyl ether acetate, 5% to 50% of phenolic resin, 0.1% to 1% of polyhydroxystyrene derivative, and 0.1% to 1% of photoacid generator.

[0084] Among them, the light output gain of the first lens 31 to the first sub-pixel 21 and the second sub-pixel 22 is 1.5 times, and the light output gain of the second lens 32 to the third sub-pixel 23 is 1.6-1.65 times.

[0085] In the embodiment, the first lens 31 and the second lens 32 are both made of organic material, and the composition and content of the first lens 31 and the second lens 32 are adjusted to ensure that the light output gain of the first lens 31 to the first sub-pixel 21 and the second sub-pixel 22 is less than the light output gain of the second lens 32 to the third sub-pixel 23, which is conducive to compensating for the light output luminance difference caused by the partition structure, improving the luminance uniformity and Gamma yield, and making the display panel have good display effect and improve the yield and product competitiveness of the display panel.

[0086] In some other embodiments, as shown in Figure 7 the material of the first lens 31 includes propylene glycol methyl ether acetate, acrylic resin, photosensitizer, and dioxane;

[0087] The first lens 31, by weight percentage, comprises 50%–80% propylene glycol methyl ether acetate, 5%–45% acrylic resin, 1%–15% photosensitizer, and 0.5–1% dioxane.

[0088] The material of the second lens 32 includes inorganic materials containing Si, O and / or N.

[0089] The material of the second lens 32 may be, but is not limited to, silicon oxide or silicon nitride.

[0090] It should be noted that in the actual processing, since the second lens 32 is made of inorganic material, it can be formed by dry etching, while the first lens 31 is made of organic material and can be formed by thermosetting. For example... Figure 9 As shown, the second lens 32, which is dry-etched, is coarser and has a steeper curvature (closer to a conical shape), as... Figure 8 As shown, the surface of the thermosetting first lens 31 is smoother, which makes the light-gathering ability of the first lens 31 less than that of the second lens 32. This ensures that the light-emitting gain of the first lens 31 for the first sub-pixel 21 and the second sub-pixel 22 is less than that of the second lens 32 for the third sub-pixel 23. This helps to compensate for the difference in light-emitting brightness caused by the partition structure, improves brightness uniformity and Gamma yield, and makes the display panel have a good display effect, thereby improving the yield rate and product competitiveness of the display panel.

[0091] In some embodiments, such as Figures 10-14 As shown, the overlapping area of ​​the orthographic projection of the first lens 31 on the substrate 10 and the orthographic projection of the pixel opening of the first sub-pixel 21 on the substrate 10 is the first overlapping area S1, and the overlapping area of ​​the orthographic projection of the first lens 31 on the substrate 10 and the orthographic projection of the pixel opening of the second sub-pixel 22 on the substrate 10 is the second overlapping area S2. The area of ​​the first overlapping area S1 may be the same as or different from the area of ​​the second overlapping area S2.

[0092] It is understandable that the size of the first overlapping region S1 reflects the size of the pixel opening area of ​​the first sub-pixel 21 covered by the first lens 31, and the size of the second overlapping region S2 reflects the size of the pixel opening area of ​​the second sub-pixel 22 covered by the second lens 32. For example, Figure 8 As shown, the areas of the first overlapping region S1 and the second overlapping region S2 are the same, therefore the light output gain of the first lens 31 for the first sub-pixel 21 and the second sub-pixel 22 is the same, as... Figures 9-12As shown, the first overlap area S1 and the second overlap area S2 are different in size, and the light emission gain of the first lens 31 on the first sub-pixel 21 and the second sub-pixel 22 is different. By changing the position of the first lens 31, the size of the first overlap area S1 and the second overlap area S2 is adjusted, which is conducive to adjusting the light emission gain of the first lens 31 on the first sub-pixel 21 and the second sub-pixel 22, respectively.

[0093] For example, the first sub-pixel 21 is a red sub-pixel, and the second sub-pixel 22 is a green sub-pixel. When the area of the first lens 31 covering the first sub-pixel 21 is large, that is, the first overlap area is large, the gain of the first lens 31 on the red sub-pixel is greater than that on the green sub-pixel, which is conducive to making the display panel form a warm color tone. The size of the first overlap area and the second overlap area can be adjusted according to actual needs.

[0094] As an implementable manner, the orthographic projection of the pixel opening of the third sub-pixel 23 on the substrate 10 is located inside the orthographic projection area of the second lens 32 on the substrate 10.

[0095] The embodiment increases the effective light collection area of the second lens 32, so that the light emission gain of the third sub-pixel 23 can be more effectively realized when the second lens 32 is located on the light emission side of the third sub-pixel 23, thereby reducing the load of the third sub-pixel 23 and prolonging the service life.

[0096] As an implementable manner, the orthographic projection area of the pixel opening of the first sub-pixel 21 and the pixel opening of the second sub-pixel 22 on the substrate 10 surrounds the orthographic projection of the first lens 31 on the substrate 10.

[0097] The embodiment reduces the effective light collection area of the first lens 31, so that when the first lens 31 is located on the light emission side of the first sub-pixel 21 and the second sub-pixel 22 and the second lens 32 is located on the light emission side of the third sub-pixel 23, the light emission brightness difference caused by the partition structure can be reliably compensated, thereby effectively improving the brightness uniformity.

[0098] It should be noted that the specific contour shape of the first lens 31 and the second lens 32 can be changed according to the shape of the pixel opening of the first sub-pixel 21, the second sub-pixel 22 and the third sub-pixel 23, as long as the orthographic projection of the first lens 31 on the substrate 10 overlaps the orthographic projection of the pixel opening of the first sub-pixel 21 and the pixel opening of the second sub-pixel 22 on the substrate 10, and the orthographic projection of the second lens 32 on the substrate 10 overlaps the orthographic projection of the pixel opening of the third sub-pixel 23 on the substrate 10. For example, as shown in FIG. 1, Figures 10-14 the pixel openings of the first sub-pixel 21, the second sub-pixel 22 and the third sub-pixel 23 are hexagons, Figure 10 , 12The dashed area in FIGS. 14 represents a lens area.

[0099] As can be implemented, as shown in FIG. 13, the distance d3 between the orthographic projection of the first lens 31 on the substrate 10 and the orthographic projection of the second lens 32 on the substrate 10 is greater than or equal to 0.3 μm and less than or equal to 2 μm. Figure 3

[0100] The distance between the orthographic projection of the first lens 31 on the substrate 10 and the orthographic projection of the second lens 32 on the substrate 10 refers to the distance between the edges of the orthographic projection of the first lens 31 on the substrate 10 and the orthographic projection of the second lens 32 on the substrate 10 that are adjacent to each other.

[0101] Specifically, the distance between the orthographic projection of the first lens 31 on the substrate 10 and the orthographic projection of the second lens 32 on the substrate 10 can be, but is not limited to, 0.3 μm, 0.5 μm, 0.8 μm, 1.0 μm, 1.5 μm, or 2 μm, etc.

[0102] The present embodiment is advantageous in ensuring that the first lens 31 and the second lens 32 reliably achieve light gain for the first sub-pixel 21, the second sub-pixel 22, and the third sub-pixel 23, while avoiding mutual interference of the first lens 31 and the second lens 32 due to being too close, and avoiding the effective light collection area being reduced due to the first lens 31 and the second lens 32 being too far apart.

[0103] In some embodiments, the third sub-pixel 23 is a blue sub-pixel, the first sub-pixel 21 is a red sub-pixel, and the second sub-pixel 22 is a green sub-pixel.

[0104] In some other embodiments, the third sub-pixel 23 is a blue sub-pixel, the first sub-pixel 21 is a green sub-pixel, and the second sub-pixel 22 is a red sub-pixel.

[0105] As can be implemented, as shown in FIG. 13, the distance d3 between the orthographic projection of the first lens 31 on the substrate 10 and the orthographic projection of the second lens 32 on the substrate 10 is greater than or equal to 0.3 μm and less than or equal to 2 μm. Figure 15 It can be understood that the light-emitting layer 13 is driven to emit light, and the ideal incident path of the light from the light-emitting layer 13 to the lens layer 30 is perpendicular incidence. Therefore, the refractive indexes of the film layers between the light-emitting layer 13 and the lens layer 30 are generally consistent, for example, can be 1.45-1.65. The bonding adhesive layer 40 is located on the side of the lens layer 30 away from the substrate 10 (the light-emitting side), and the refractive index of the bonding adhesive layer 40 is less than that of the lens layer 30. In this way, when the light enters from a material with a high refractive index to a material with a low refractive index, the light is deflected towards the center direction due to the difference in refractive index, thereby reliably achieving gain.

[0106]

[0107] ​​In some embodiments, the difference between the refractive index of the lens layer 30 and the refractive index of the bonding adhesive layer 40 is less than or equal to 2.

[0108] In preferred embodiments, the difference between the refractive index of the lens layer 30 and the refractive index of the bonding adhesive layer 40 is greater than 0 and less than or equal to 1.

[0109] The difference between the refractive index of the lens layer 30 and the bonding adhesive layer 40 of the present embodiment is beneficial to further improve the light efficiency gain.

[0110] In summary, the display panel of the embodiments of the present application sets the lens layer 30 on the side of the sub-pixel away from the substrate 10, the lens layer 30 includes a first lens 31 and a second lens 32, the orthographic projection of the first lens 31 on the substrate 10 overlaps the orthographic projection of the pixel opening of the first sub-pixel 21 and the pixel opening of the second sub-pixel 22 on the substrate 10, and the orthographic projection of the second lens 32 on the substrate 10 overlaps the orthographic projection of the pixel opening of the third sub-pixel 23 on the substrate 10. In this way, since the first lens 31 covers the first sub-pixel 21 and the second sub-pixel 22, and the first lens 31 has a light condensing and deflection effect, the pixel gain area of the first sub-pixel 21 and the second sub-pixel 22 after passing through the lens is deflected to the area close to the center of the entire area of the first sub-pixel 21 and the second sub-pixel 22, which deviates from the light intensity core area (i.e. the pixel center light emitting area) of the first sub-pixel 21 and the second sub-pixel itself, thereby appropriately weakening the light emitting gain of the first sub-pixel 21 and the second sub-pixel 22; the light condensing and deflection effect of the second lens 32 makes the light rays in the edge area of the third sub-pixel 23 deflected to the center, so that the pixel gain area of the third sub-pixel 23 substantially coincides with the light intensity core area (i.e. the pixel center light emitting area) of the third sub-pixel 23 itself, thereby strengthening the pixel gain of the third sub-pixel 23, and further compensating for the brightness difference caused by the partition structure.

[0111] In addition, the light condensing ability of the first lens 31 is less than that of the second lens 32, which is beneficial to reliably compensate for the brightness difference between different color sub-pixels caused by the partition structure, thereby effectively improving the brightness uniformity and Gamma rate, so that the display panel has good display effect and improves the yield rate and product competitiveness of the display panel.

[0112] In a second aspect, the utility model provides a kind of display device, including the display panel of first aspect.It can be understood that the display device has all features and advantages of the above-mentioned display panel, which will not be repeated here.In short, the quality and yield rate of the display device are high, and the display effect is good.

[0113] The display device can be any one of a display, a television, a billboard, a digital photo frame, a laser printer with display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a household appliance, an information inquiry device (such as a business inquiry device of an electronic government, a bank, a hospital, and a power department), a monitor, and the like. The display device can also be a micro display or a product containing a micro display. The product containing a micro display can be any one of a smart watch, a smart bracelet, a head-mounted display, a stereoscopic display mirror, and an AR device (such as AR glasses), a VR device (such as VR glasses), and the like. For example, the micro display can be a display with a display size ranging from about 0.2 inches to about 2.5 inches, but is not limited thereto, and it can be understood that the micro display can also be a display with a smaller display size, for example, a display size less than or equal to 0.2 inches.

[0114] It should be understood that the above-mentioned terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated panel or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0115] The above description is only the preferred embodiment of the present application and the explanation of the technical principles applied. Those skilled in the art should understand that the scope of the utility model disclosed in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or equivalent features without departing from the concept of the utility model. For example, the technical solutions formed by mutually replacing the above features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a sub-pixel disposed on the substrate, the sub-pixel comprising a first sub-pixel, a second sub-pixel and a third sub-pixel; a lens layer located on a side of the sub-pixel away from the substrate, the lens layer comprising a first lens and a second lens arranged at intervals, a projection of the first lens on the substrate overlaps with a projection area of a pixel opening of the first sub-pixel and a pixel opening of the second sub-pixel on the substrate, a projection of the second lens on the substrate overlaps with a pixel opening of the third sub-pixel on the substrate; wherein the lens layer is used to converge the outgoing light of the sub-pixel.

2. The display panel of claim 1, wherein, The condensing power of the first lens is less than the condensing power of the second lens.

3. The display panel of claim 2, wherein, The curvature of the first lens is less than the curvature of the second lens.

4. The display panel of claim 2, wherein, The arch height of the first lens is less than or equal to the arch height of the second lens.

5. The display panel of claim 4, wherein, The arch height of the first lens is 1.0-1.6 μm, and the arch height of the second lens is 1.6-2.5 μm.

6. The display panel of claim 2, wherein, The refractive index of the first lens is less than the refractive index of the second lens.

7. The display panel according to any one of claims 1-6, characterized in that, The overlapping area of the projection of the first lens on the substrate and the projection of the pixel opening of the first sub-pixel on the substrate is a first overlapping area, the overlapping area of the projection of the first lens on the substrate and the projection of the pixel opening of the second sub-pixel on the substrate is a second overlapping area, the area of the first overlapping area and the area of the second overlapping area are the same or different.

8. The display panel according to any one of claims 1-6, wherein, The projection of the pixel opening of the third sub-pixel on the substrate is located inside the projection area of the second lens on the substrate.

9. The display panel according to any one of claims 1-6, wherein, The projection area of the pixel opening of the first sub-pixel and the pixel opening of the second sub-pixel on the substrate encloses the projection of the first lens on the substrate.

10. The display panel according to any one of claims 1-6, wherein, The distance between the projection of the first lens on the substrate and the projection of the second lens on the substrate is greater than or equal to 0.3 μm and less than or equal to 2 μm.

11. The display panel according to any one of claims 1-6, wherein, The third sub-pixel is a blue sub-pixel, the first sub-pixel is a red sub-pixel, and the second sub-pixel is a green sub-pixel. Alternatively, the third sub-pixel is a blue sub-pixel, the first sub-pixel is a green sub-pixel, and the second sub-pixel is a red sub-pixel.

12. The display panel of any of claims 1-6, wherein, The display panel further comprises a bonding adhesive layer, the bonding adhesive layer is located on a side of the lens layer away from the substrate, and the refractive index of the bonding adhesive layer is less than the refractive index of the lens layer.

13. The display panel of claim 12, wherein, The difference between the refractive index of the lens layer and the refractive index of the bonding adhesive layer is less than or equal to 2.

14. A display device, characterized by The display panel of any one of claims 1-13. The display panel of any one of claims 1-13.

Images