Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a driving backboard, a plurality of light-emitting light sources, a lens and a light absorption layer. The light-emitting light sources are arranged on one side of the driving back plate, and the light-emitting light sources are arranged at intervals. The lens is arranged on the side, away from the driving backboard, of the light-emitting light source. The orthographic projection of the lens on the driving backboard is overlapped with the orthographic projection of the light-emitting light source on the driving backboard. The light absorption layer is arranged on the side, away from the driving back plate, of the lens and comprises a light transmitting part opposite to the light emitting source, the lens comprises an arc face, and the orthographic projection of the light transmitting part on the driving back plate and the orthographic projection of the arc face on the driving back plate are overlapped. And the orthographic projection of the light-transmitting part on the driving back plate is overlapped with the orthographic projection of the light-emitting surface of the light-emitting light source on the driving back plate. The cooperation of the lens and the light absorption layer can reduce the optical crosstalk between adjacent pixels of the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the continuous development and progress of display technology, it is very important for displays to present natural colors in the largest range and bring people a more realistic and shocking visual experience. Among the implementation methods of wide color gamut, QD (quantum dots) has a narrow luminous spectrum and high color purity, showing unique advantages. QDCF (quantum dots color film) has been widely studied in recent years as one of the applications of photoluminescent quantum dots. The backlight source of quantum dot color film can be equipped with various backlight sources such as blue light OLED and microLED, so that light can pass through the red and green color filters composed of quantum dots to achieve full-color display, and the development prospects are good.

[0003] However, since the light emission angle of micro-LED is large, the emitted light of the microLED of a certain pixel will illuminate the adjacent pixel and cause optical crosstalk. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a display panel and a display device to solve the optical crosstalk problem of the display panel. The specific technical solution is as follows:

[0005] In a first aspect, the present application provides a display panel, comprising: a driving backplane; a plurality of light sources, the light sources being arranged on one side of the driving backplane and being arranged at intervals; a lens, the lens being arranged on a side of the light source away from the driving backplane, the orthographic projection of the lens on the driving backplane overlapping with the orthographic projection of the light source on the driving backplane; a light absorbing layer, the light absorbing layer being arranged on a side of the lens away from the driving backplane, the light absorbing layer comprising a light-transmitting portion arranged opposite to the light source, the lens comprising a curved surface, the orthographic projection of the light-transmitting portion on the driving backplane overlapping with the orthographic projection of the curved surface on the driving backplane, and the orthographic projection of the light-transmitting portion on the driving backplane overlapping with the orthographic projection of the light-emitting surface of the light source on the driving backplane.

[0006] In addition, the display panel provided according to the first aspect of the present application may also have the following technical features:

[0007] In some embodiments, the light-transmitting portion is a hollow configuration or a transparent film layer.

[0008] In some embodiments, an orthographic projection area of ​​the light-transmitting portion on the driving backplane is larger than an orthographic projection area of ​​the light-emitting surface of the light-emitting light source on the driving backplane.

[0009] In some embodiments, the light-emitting width of the light-emitting surface along the X-direction is d1, the X-direction is any direction parallel to the driving backplane, the opening width of the light-transmitting portion along the X-direction is d2, the distance between the light-emitting surface and a side of the light-absorbing layer away from the driving backplane in the Y-direction is H, the Y-direction is a direction perpendicular to the driving backplane, the refractive index of the light-absorbing layer is n1, the refractive index of the lens is n2, and H≥0.5(d2-d1)*tan[arcsin(n1 / n2)].

[0010] In some embodiments, the OD value of the light absorbing layer is 1-4.

[0011] In some embodiments, the OD value of the light absorbing layer is 1.2-2.0.

[0012] In some embodiments, the thickness of the light absorbing layer is less than or equal to 10 um.

[0013] In some embodiments, the lens is in direct contact with the outer surface of the light source and covers the outer surface of the light source; the light absorbing layer is in direct contact with the outer surface of the lens.

[0014] In some embodiments, the display panel also includes a light conversion layer, the light conversion layer includes a filter layer arranged on the side of the light absorbing layer away from the driving backplane, the filter layer includes a first color filter portion, a second color filter portion and a third color filter portion arranged in an array, and the orthographic projection of each of the first color filter portion, the second color filter portion and the third color filter portion on the driving backplane overlaps with the orthographic projection of the light source corresponding to each of them on the driving backplane.

[0015] In some embodiments, the light conversion layer further includes a first light adjustment layer, which is disposed on a side of the filter layer close to the driving backplane, and the first light adjustment layer is used to transmit light emitted by the light source.

[0016] In some embodiments, the light conversion layer further includes a second light adjustment layer, which is disposed on a side of the filter layer away from the driving backplane, and the second light adjustment layer is used to reflect light emitted by the luminous light source.

[0017] In some embodiments, the first light adjustment layer and the second light adjustment layer are Nb2O5 film layer, TiO2 film layer, SiN x Film, SiO x A composite structure in which at least two of the film layers are alternately stacked.

[0018] In some embodiments, the light source is a blue light source, and the second light adjustment layer is provided with an opening at a position corresponding to the filter portion that allows blue light to pass through.

[0019] In some embodiments, one of the first color filter section, the second color filter section and the third color filter section is a red filter section, one is a green filter section, and one is a blue filter section; the red filter section includes a red quantum dot material or a red phosphor material, the green filter section includes a green quantum dot material or a green phosphor material, and the blue filter section is a transparent material; the orthographic projection area of ​​the first color filter section, the second color filter section and the third color filter section on the driving backplane is larger than the orthographic projection area of ​​the corresponding lens on the driving backplane.

[0020] In some embodiments, there are gaps between the color filter parts, and the filter layer includes a light-shielding layer, and the light-shielding layer is used to fill the gaps.

[0021] A second aspect of the present application provides a display device, comprising the display panel described above.

[0022] Beneficial effects of the embodiments of the present application:

[0023] In the display panel provided by the embodiment of the present application, a plurality of light sources are bound to a driving backplane, and a plurality of adjacent light-emitting units are arranged at intervals. A lens is arranged on a side of the light source away from the driving backplane, and the orthographic projection of the lens on the driving backplane overlaps with the orthographic projection of the light source on the driving backplane, so as to collimate the outgoing light of the light source. A light-absorbing layer is arranged on a side of the lens away from the driving backplane, and a light-transmitting portion is provided on the light-absorbing layer at a position opposite to the light-emitting light source. The lens includes an arc surface, and the orthographic projection of the light-transmitting portion on the driving backplane overlaps with the orthographic projection of the arc surface on the driving backplane, and the orthographic projection of the light-transmitting portion on the driving backplane overlaps with the orthographic projection of the light-emitting surface of the light source on the driving backplane. The light-absorbing layer can absorb the large-angle outgoing light emitted by the light-emitting light source toward the edge of the lens, thereby reducing the light crosstalk phenomenon caused by the large-angle outgoing light emitted by other adjacent color filter portions. Under the cooperation of the lens and the light-absorbing layer, the outgoing light of the light-emitting light source is concentrated through the middle of the lens and collimated, thereby effectively reducing the light crosstalk problem in the large-angle direction. Of course, implementing any product or method of the present application does not necessarily require achieving all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0025] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of the structure of a single sub-pixel;

[0027] Figure 3 is a schematic diagram of the structure of color conversion of a red sub-pixel;

[0028] Figure 4 is a schematic diagram of the structure of the color conversion of the green sub-pixel;

[0029] Figure 5 is a schematic diagram of the structure of the color conversion of the blue sub-pixel;

[0030] Figure 6 is a schematic structural diagram of a first light adjustment layer in an embodiment;

[0031] Figure 7 is a schematic structural diagram of the first light adjustment layer in another embodiment;

[0032] Figure 8 This is a display effect diagram of the display panel provided in an embodiment of the present application.

[0033] The figure numbers are as follows: driving backplane 10; light source 11; lens 12; curved surface 121; light absorption layer 13; light transmitting portion 131; light conversion layer 20; filter layer 21; red filter portion 211; green filter portion 212; blue filter portion 213; light shielding layer 214; first light adjustment layer 22; second light adjustment layer 23; opening 231; light emitting width d1; opening width d2; distance H. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field based on the present application belong to the scope of protection of the present application.

[0035] A first aspect of an embodiment of the present application provides a display panel, such as Figure 1As shown, the display panel includes: a driving backplane 10, a plurality of light sources 11, a lens 12 and a light absorbing layer 13. The light source 11 is arranged on one side of the driving backplane 10, and the plurality of light sources 11 are arranged at intervals. The lens 12 is arranged on the side of the light source 11 away from the driving backplane 10, and the orthographic projection of the lens 12 on the driving backplane 10 overlaps with the orthographic projection of the light source 11 on the driving backplane 10. The light absorbing layer 13 is arranged on the side of the lens 12 away from the driving backplane 10, and the light absorbing layer 13 includes a light-transmitting portion 131 arranged opposite to the light source 11, the lens 12 includes a curved surface 121, the orthographic projection of the light-transmitting portion 131 on the driving backplane 10 overlaps with the orthographic projection of the curved surface 121 on the driving backplane 10, and the orthographic projection of the light-transmitting portion 131 on the driving backplane 10 overlaps with the orthographic projection of the light-emitting surface 111 of the light source 11 on the driving backplane 10.

[0036] In this embodiment, a plurality of light sources 11 are bound to the driving backplane 10, and a plurality of adjacent light emitting units are arranged at intervals. The lens 12 is arranged on the side of the light source 11 away from the driving backplane 10, and the orthographic projection of the lens 12 on the driving backplane 10 overlaps with the orthographic projection of the light source 11 on the driving backplane 11, and is used to collimate the outgoing light of the light source 11. The light absorption layer 13 is arranged on the side of the lens 12 away from the driving backplane 10, and the light absorption layer 13 is provided with a light-transmitting portion 131 at a position opposite to the light source 11. The lens 12 includes a curved surface 121, and the orthographic projection of the light-transmitting portion 131 on the driving backplane 10 overlaps with the orthographic projection of the curved surface 121 on the driving backplane 10, and the orthographic projection of the light-transmitting portion 131 on the driving backplane 10 overlaps with the orthographic projection of the light-emitting surface 111 of the light source 11 on the driving backplane 10. The light absorbing layer 13 can absorb the large-angle emitted light from the light source 11 to the edge of the lens 12, reducing the light crosstalk caused by the large-angle emitted light emitted by other adjacent color filter parts. Under the cooperation of the lens 12 and the light absorbing layer 13, the emitted light of the light source 11 is concentrated through the middle of the lens 12 and collimated, thereby effectively reducing the light crosstalk problem in the large-angle direction.

[0037] Furthermore, the lens 12 is in direct contact with the outer surface of the light source 11 and covers the outer surface of the light source 11 ; the light absorbing layer 13 is in direct contact with the outer surface of the lens 12 .

[0038] In this embodiment, the lens 12 covers the outer surface of the light source 11. Figure 2 As shown, Figure 2It is a structural schematic diagram of a single sub-pixel. In addition to covering the light-emitting surface 111 of the light-emitting light source 11, the lens 12 also covers the surrounding areas of the light-emitting light source 11. The light-absorbing layer 13 is in direct contact with the outer surface of the lens 12 and is arranged on the side of the lens 12 away from the driving backplane 10, that is, the light-absorbing layer 13 fills the gap between the light-emitting light sources 11. There is an interface between the lens 12 and the light-absorbing layer 13 around the light-emitting light source 11. The large-angle emitted light can be further screened at the interface between the lens 12 and the light-absorbing layer 13, so that a part of the large-angle emitted light can change direction and be collimated and emitted in a direction perpendicular to the light-emitting surface 111 to reduce optical crosstalk.

[0039] The light source 11 may be an OLED chip, a miniLED chip or a microLED chip, and the light emitted by the microLED chip may also be ultraviolet light with a shorter wavelength. The OLED chip, miniLED chip or microLED chip is usually prepared on a transfer substrate first, and then transferred to the driving backplane 10 and bound to the driving backplane 10. A pixel driving circuit (not shown) is provided on the driving backplane 10, and each OLED chip, miniLED chip or microLED chip can be electrically connected to a corresponding pixel driving circuit, so that each OLED chip, miniLED chip or microLED chip can emit light independently.

[0040] The light absorbing layer 13 may include light absorbing materials such as black ink or black paint, and typical preparation materials include resin substances doped with black pigment or carbon black, such as copolymers such as acrylic resin / styrene polymer.

[0041] In some embodiments, the light conversion layer 20 includes a filter layer 21 arranged on the side of the light absorbing layer 13 away from the driving backplane 10, and the filter layer 21 includes a first color filter portion, a second color filter portion and a third color filter portion arranged in an array, and the orthographic projection of each first color filter portion, the second color filter portion and the third color filter portion on the driving backplane overlaps with the orthographic projection of its corresponding light source 11 on the driving backplane 10.

[0042] In this embodiment, the configuration of the light conversion layer 20 allows the light source 11 to be a light source of a single color, and through the selective absorption of the light conversion layer 20 to transmit light of a specific color or perform color conversion through the light conversion layer 20, the display panel can also display in full color when the light source 11 is a light source of a single color.

[0043] In some embodiments, Figure 1 and Figure 2As shown, the light conversion layer 20 further includes a first light adjustment layer 22 . The first light adjustment layer 22 is disposed on a side of the filter layer 21 close to the driving backplane 10 . The first light adjustment layer 22 is used to transmit light emitted by the light source 11 .

[0044] In this embodiment, the emitted light of the luminescent light source 11 first passes through the first light adjustment layer 22 and then passes through the filter layer 21. The emitted light is preliminarily screened by the first light adjustment layer 22, allowing the light emitted by the luminescent light source 11 to pass through, and other colors of light will be filtered out. After passing through the first adjustment layer, the wavelength range of the emitted light is further narrowed, reducing the probability of stray light. The luminescent light source 11 is generally blue light or purple light. Since the wavelength of blue light or purple light is short and the energy is relatively high, it can increase the brightness of the display panel and help reduce power consumption.

[0045] In some embodiments, Figure 1 As shown, the light conversion layer 20 further includes a second light adjustment layer 23 , which is disposed on a side of the filter layer 21 away from the driving backplane 10 , and is used to reflect light emitted by the luminous light source 11 .

[0046] In this embodiment, the output light of the luminescent light source 11 first passes through the first light adjustment layer 22 and then through the filter layer 21 and finally through the second light adjustment layer 23. The first light adjustment layer 22 allows the light emitted by the luminescent light source 11 to pass through, and is converted into the three primary colors of red, green and blue after being filtered by the filter layer 21, and finally passes through the second light adjustment layer 23. The second light adjustment layer 23 is used to reflect the light emitted by the luminescent light source 11, that is, to reflect the stray light that has not been converted into the corresponding three primary colors, thereby further reducing the probability of optical crosstalk.

[0047] In some embodiments, the light source 11 is a blue light source, and the second light adjustment layer 23 is provided with an opening 131 at a position corresponding to the filter portion that allows blue light to pass through.

[0048] In this embodiment, the light source 11 is blue light. Since the wavelength of blue light is shorter and less harmful to the human body than purple light, the light source 11 is generally a blue light source. The first light adjustment layer 22 allows blue light to pass through, and the second light adjustment layer 23 is provided with an opening 231 at the position corresponding to the filter portion that allows blue light to pass through, so that all blue light can pass through, and there is no opening 231 at the position corresponding to the position that allows red light and green light to pass through, so that the blue light will be reflected back, ensuring that no blue light will be emitted at the position that allows red light and green light to pass through, further reducing the probability of optical crosstalk.

[0049] In some embodiments, one of the first color filter section, the second color filter section, and the third color filter section is a red filter section 211, one is a green filter section 212, and one is a blue filter section 213; the red filter section 211 includes a red quantum dot material or a red phosphor material, the green filter section 212 includes a green quantum dot material or a green phosphor material, and the blue filter section 213 is a transparent material. Figure 3-Figure 5 As shown, Figure 3 is a schematic diagram of the structure of a red sub-pixel. Figure 4 is a schematic diagram of the structure of a green sub-pixel. Figure 5 is a schematic diagram of the structure of a blue sub-pixel. Figure 3-Figure 5 In the figure, R represents red light, B represents blue light, and G represents green light. The orthographic projection areas of the first color filter, the second color filter, and the third color filter on the driving backplane 10 are larger than the orthographic projection areas of the corresponding lenses 12 on the driving backplane 10 .

[0050] In this embodiment, one of the first color filter, the second color filter and the third color filter is a red filter 211, one is a green filter 212, and one is a blue filter 213, which can convert the light of the same color emitted by the light source 11 into the three primary colors of red, green and blue through the color conversion effect of the filter, thereby realizing the full-color display of the display panel. Since each color filter is a color conversion filter rather than an absorption filter, it can solve the optical crosstalk and reduce the power consumption of the display panel. The positive projection area of ​​each color filter on the driving backplane 10 is larger than the positive projection area of ​​each corresponding lens 12 on the driving backplane 10, and the light emitted from each direction by the lens 12 can be color-converted once, so as to prevent the light leakage caused by the incomplete absorption of the exciting blue light by the filter, causing blue light leakage, color gamut reduction, and optical crosstalk problems.

[0051] like Figure 5 As shown, since the first light adjustment layer 22 only allows blue light to pass through, under the premise of providing the first light adjustment layer 22, the blue filter part 213 can be made of a transparent material to allow all blue light to pass through. The red filter part 211 and the green filter part 212 can both be made of quantum dot materials or phosphor materials. Whether it is quantum dot filtering technology or phosphor filtering technology, its color conversion utilizes its ability to convert fluorescence emission. The difference is that the fluorescence emission of quantum dots comes from electron transitions, and its color is determined by the nanocrystal particle size of the quantum dots, which is a manifestation of the quantum confinement effect at the nanoscale, while the fluorescence emission of phosphors comes from their lattice defects, and its color is produced by doping different ions.

[0052] Furthermore, the difference between red quantum dot materials and green quantum dot materials lies in the different particle sizes of nanocrystals. The particle size of red quantum dots is usually between 5nm-8nm, and the particle size of green quantum dots is usually between 2nm-5nm. Red quantum dots emit red light when stimulated by light, and green quantum dots emit green light when stimulated by light. Quantum dot materials have the advantages of high luminous efficiency, narrow spectrum, high color purity, and wide color gamut. Therefore, using quantum dot materials as filter parts can provide more realistic color display for display panels. The luminescence of phosphors has the advantage of large color adjustability, so softer or brighter colors can be obtained to meet different application needs.

[0053] Exemplarily, the quantum dot material filter part generally disperses the luminescent quantum dot particles in a heat-curing glue or a UV-curing glue, and then applies the heat-curing glue or the UV-curing glue to the side of the first light adjustment layer 22 away from the driving backplane 10 to form a quantum dot layer, and then a photoresist is coated on the quantum dot layer, and a patterned quantum dot filter layer 21 is obtained by developing and etching. Common quantum dot materials include cadmium sulfide (CdS), zinc oxide (ZnO), lead sulfide (PbS), zinc sulfide (ZnS), cadmium selenide (CdSe), indium phosphide (InP), etc. Common phosphor materials include calcium sulfate, magnesium oxide, aluminum oxide, strontium oxide, potassium fluorosilicate (KSF), aluminum oxide doped with nitrogen, gallium nitride, zinc sulfide, silver sulfide, calcium sulfide, etc.

[0054] In some embodiments, the first light adjustment layer 22 and the second light adjustment layer 23 are Nb2O5 film layers, TiO2 film layers, SiN x Film, SiO x A composite structure in which at least two layers of the film are alternately stacked. Figure 6 , Figure 7 FIG. 2 is a schematic diagram of the structure of the first light adjustment layer 22, wherein: Figure 6 The first light adjustment layer 22 is composed of a Nb2O5 film layer and a SiN x Schematic diagram of the structure formed by alternating the two membrane layers. Figure 7 The first light adjustment layer 22 is composed of a TiO2 film layer and a SiO x The schematic diagram of the structure is formed by alternating stacking of two membrane layers. Of course, there may be other combined deformation structures, which are not limited in the present application.

[0055] Specifically, whether the first light adjustment layer 22 and the second light adjustment layer 23 transmit blue light or reflect blue light is related to the thickness of each film layer and the refractive index of each film layer. Figure 6 , Figure 7As shown, each stack of the first light adjustment layer 22 can be an oxide film formed by magnetron sputtering / electron beam evaporation, and the thickness of each stack is generally tens of nanometers. The thickness of the stacked first light adjustment layer 22 is generally about 1 μm, so as to ensure a transmittance of more than 99.5% in the selected wavelength band. For the second light adjustment layer 23, it is necessary to ensure a reflectivity of more than 99.5% in the selected wavelength band.

[0056] In this embodiment, the first light adjustment layer 22 and the second light adjustment layer 23 are both composite structures of multiple film layers with different refractive indices alternately stacked, such as Nb2O5 film layer, TiO2 film layer, SiN x Film, SiO x Two or three or four film layers are stacked alternately. Using the Bragg reflection principle, when light is incident on the first light adjustment layer 22 or the second light adjustment layer 23 structure, reflection will occur at the interface of each dielectric layer, and an interference effect enhanced by multiple reflections will occur. Under certain conditions, the interference between these reflected waves will cause light of a specific wavelength to be strongly reflected, while light of other wavelengths will be almost completely transmitted. This phenomenon is called selective reflection. Specifically, when the wavelength of the incident light is the same as or an integer multiple of the period of the light adjustment layer structure, the phase difference of different reflected lights is completely consistent, so that interference constituting a significant diffraction maximum will occur, and ultimately produce a strong reflection. When the wavelength of the incident light does not match the period, the interference between different reflected waves will cancel or superimpose each other, so that selective reflection or transmission can be achieved. Therefore, according to the wavelength to be reflected or transmitted as needed, the first light adjustment layer 22 can be set to a film layer that allows blue light to pass through, and the second light adjustment layer 23 can be set to a film layer that reflects blue light.

[0057] As a feasible approach, Figure 1 , Figure 5 As shown, the light-transmitting portion 131 is a hollow arrangement or a transparent film layer.

[0058] In this embodiment, when the light-transmitting portion 131 is hollowed out, that is, the light-absorbing layer 13 is provided with a hole at this position, the structure can be simplified. Furthermore, the hole can be a circular hole, a square hole, a polygonal hole or a special-shaped hole. When the light-transmitting portion 131 is a transparent film layer, for example, it can be a transparent resin layer, that is, the light-absorbing layer 13 is no longer perforated, but is composed of a light-absorbing part and a light-transmitting part, which is conducive to maintaining the uniformity of the thickness of the light-absorbing layer 13 and facilitating the production of subsequent film layers.

[0059] In some embodiments, Figure 1 As shown, there are intervals between the color filter parts, and the filter layer 21 includes a light shielding layer 214, which is used to fill the intervals.

[0060] In this embodiment, the light shielding layer 214 between the color filter parts can further reduce the probability of light crosstalk between adjacent light sources 11, thereby improving the display effect of the display panel. The light shielding layer 214 can be a metal light shielding layer or a black matrix.

[0061] In some embodiments, the orthographic projection area of ​​the light-transmissive portion 131 on the driving backplane 10 is larger than the orthographic projection area of ​​the light-emitting surface 111 of the light-emitting source 11 on the driving backplane 10 .

[0062] In this embodiment, the orthographic projection area of ​​the light-transmitting portion 131 on the driving backplane 10 is larger than the orthographic projection area of ​​the light-emitting surface 111 on the driving backplane 10, which can increase the emission area of ​​the emitted light, thereby increasing the intensity of the emitted light, increasing the brightness of the display panel, and reducing the power consumption of the display panel.

[0063] In some embodiments, Figure 2 As shown, the luminous width of the light-emitting surface 111 along the X direction is d1, the X direction is any direction parallel to the driving backplane 10, the opening width of the light-transmitting portion 131 in the X direction is d2, the distance between the light-emitting surface 111 and the side of the light-absorbing layer 13 away from the driving backplane 10 in the Y direction is H, the Y direction is a direction perpendicular to the driving backplane 10, the refractive index of the light-absorbing layer 13 is n1, the refractive index of the lens 12 is n2, and H≥0.5(d2-d1)*tan[arcsin(n1 / n2)].

[0064] In the X direction, when the opening width d2 of the light-transmitting portion 131 and the light-emitting width d1 of the light-emitting surface 111, the refractive index n1 of the light-absorbing layer 13, and the refractive index n2 of the lens 12 satisfy the relationship H≥0.5(d2-d1)*tan[arcsin(n1 / n2)], the probability of light crosstalk can be reduced and the power consumption of the display panel can be reduced. Exemplarily, when the refractive index of the light-absorbing layer 13 is 1.46 and the refractive index of the lens 12 is 2.0, d1≤d2≤d1+1.87H, and the width of H is not higher than the arch height of the lens 12. The arch height of the lens 12 refers to the distance between the highest point of the convex surface of the lens 12 and the lowest point of the convex surface.

[0065] Considering that the lens 12 excites blue light in the positive direction of the light source 11, that is, in the direction perpendicular to the light emitting surface 111, the brightness of the pixel in the positive direction can be increased by 30%, achieving the effect of focusing and collimating light. At the same time, the first light adjustment layer 22 also suppresses the emission of blue light at a large viewing angle. According to the current morphology of the light conversion layer 20, the center of the pixel will be the highest point of brightness, such as Figure 8 The specific gain value of the blue light excited by the lens 12 in the positive direction is related to the characteristics of the exciting light source, the arch height ratio of the lens 12, the optical structure and other factors, and 30% is not necessarily the highest value.

[0066] In some embodiments, the OD (Optical Density) value of the light absorbing layer 13 is 1 to 4, for example, 1.2, 1.5, 1.8, 2.0, 3.1, 3.3, 3.5, 3.8, 4.0, etc. The absorbance represents the degree of absorption of light. The larger the absorbance value, the greater the absorption of light by the light absorbing layer 13, which can reduce the intensity of light emitted at a large angle.

[0067] Furthermore, the OD value of the light absorbing layer 13 may be 1.2 to 2.0.

[0068] In some embodiments, the thickness of the light absorbing layer 13 is less than or equal to 10 μm. When the thickness of the light absorbing layer 13 is less than or equal to 10 μm, reducing the thickness of the light absorbing layer 13 while meeting the absorbance requirement is beneficial to reducing the thickness of the display panel, thereby facilitating the thinning of the display panel.

[0069] Furthermore, for high-resolution high-order display panels, the thickness of the light absorption layer 13 is preferably less than or equal to 5 um.

[0070] The thickness of the lens 12 may be within 3 μm. Under the premise of satisfying the light collimation function, reducing the thickness of the lens 12 is beneficial to reducing the thickness of the display panel, thereby facilitating the thinning of the display panel.

[0071] The embodiment of the present application further provides a method for manufacturing a display panel, which is used to manufacture the display panel described above, and comprises the following steps:

[0072] Step 1: Provide a driving backplane 10 .

[0073] Step 2: Arrange a plurality of light sources 11 at intervals on the driving backplane 10 .

[0074] Step 3: A lens 12 film layer is made on the side of the light source 11 away from the driving backplane 10 , and the orthographic projection of the lens 12 on the driving backplane 10 overlaps with the orthographic projection of the light source 11 on the driving backplane 10 .

[0075] Step 4: A light absorbing layer 13 is made on the side of the lens 12 away from the driving backplane 10, the light absorbing layer 13 includes a light-transmitting portion 131, the lens 12 includes a curved surface 121, the orthographic projection of the light-transmitting portion 12 on the driving backplane 10 overlaps with the orthographic projection of the curved surface 121 on the driving backplane 10, and the orthographic projection of the light-transmitting portion 131 on the driving backplane 10 overlaps with the orthographic projection of the light-emitting surface 111 of the light-emitting light source 11 on the driving backplane 10.

[0076] In this embodiment, the lens 12 is arranged on the side of the light source 11 away from the driving backplane 10, and the orthographic projection of the lens 12 on the driving backplane 10 overlaps with the orthographic projection of the light source 11 on the driving backplane 11, so as to collimate the emitted light of the light source 11. The light absorbing layer 13 is arranged on the side of the lens 12 away from the driving backplane 10, and the light absorbing layer 13 is provided with a light-transmitting portion 131 at a position opposite to the light source 11. The lens includes a curved surface 121, and the orthographic projection of the light-transmitting portion 131 on the driving backplane 10 overlaps with the orthographic projection of the curved surface 121 on the driving backplane, and the orthographic projection of the light-transmitting portion 131 on the driving backplane 10 overlaps with the orthographic projection of the light-emitting surface 111 of the light source 11 on the driving backplane 10. The light absorbing layer 13 can absorb the large-angle emitted light emitted by the light source 11 to the edge of the lens 12, thereby reducing the light crosstalk phenomenon caused by the large-angle emitted light emitted by other adjacent color filter portions. Under the cooperation of the lens 12 and the light absorbing layer 13, the outgoing light of the light source 11 is concentrated through the middle of the lens 12 and collimated, thereby effectively reducing the light crosstalk problem in large angle directions.

[0077] The second aspect of the embodiment of the present application provides a display device, including the display panel described above. The display device includes a display panel, wherein a lens 12 is provided on the side of the light source 11 away from the driving backplane 10, and a light absorbing layer 13 is provided on the side of the lens 12 away from the driving backplane 10, and the light absorbing layer 13 is provided with a light-transmitting portion 131 at a position opposite to the light source 11, and the lens 12 includes a curved surface 121, and the orthographic projection of the light-transmitting portion 131 on the driving backplane 10 overlaps with the orthographic projection of the curved surface 121 on the driving backplane 10, and the orthographic projection of the lens 12 on the driving backplane 10 overlaps with the orthographic projection of the light-emitting surface 111 of the light source 11 on the driving backplane 10, so that the light absorbing layer 13 can collimate the light incident on the middle of the lens 12 and absorb the large-angle light incident on the edge of the lens 12, thereby reducing the probability of light crosstalk and improving the display effect of the display device.

[0078] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0079] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0080] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: Driver backplane; A plurality of light sources, wherein the light sources are arranged on one side of the driving backplane and the plurality of light sources are arranged at intervals; A lens, wherein the lens is disposed on a side of the light source away from the driving backplane, and the orthographic projection of the lens on the driving backplane overlaps with the orthographic projection of the light source on the driving backplane; A light absorbing layer, wherein the light absorbing layer is arranged on a side of the lens away from the driving backplane, the light absorbing layer includes a light-transmitting portion arranged opposite to the light-emitting light source, the lens includes a curved surface, the orthographic projection of the light-transmitting portion on the driving backplane overlaps with the orthographic projection of the curved surface on the driving backplane, and the orthographic projection of the light-transmitting portion on the driving backplane overlaps with the orthographic projection of the light-emitting surface of the light-emitting light source on the driving backplane.

2. The display panel according to claim 1, characterized in that: The light-transmitting portion is a hollow arrangement or a transparent film layer.

3. The display panel according to claim 1, characterized in that: The orthographic projection area of ​​the light-transmitting portion on the driving backplane is larger than the orthographic projection area of ​​the light-emitting surface of the light-emitting light source on the driving backplane.

4. The display panel according to claim 3, characterized in that: The light-emitting width of the light-emitting surface along the X-direction is d1, the X-direction is any direction parallel to the driving backplane, the opening width of the light-transmitting portion along the X-direction is d2, the distance between the light-emitting surface and a side of the light-absorbing layer away from the driving backplane in the Y-direction is H, the Y-direction is a direction perpendicular to the driving backplane, the refractive index of the light-absorbing layer is n1, the refractive index of the lens is n2, and H≥0.5(d2-d1)*tan[arcsin(n1 / n2)].

5. The display panel according to claim 1, characterized in that: The OD value of the light absorbing layer is 1-4.

6. The display panel according to claim 5, characterized in that: The OD value of the light absorbing layer is 1.2 to 2.

0.

7. The display panel according to claim 1, characterized in that: The thickness of the light absorbing layer is less than or equal to 10 um.

8. The display panel according to any one of claims 1 to 7, characterized in that: The lens is in direct contact with the outer surface of the light source and covers the outer surface of the light source; the light absorbing layer is in direct contact with the outer surface of the lens.

9. The display panel according to any one of claims 1 to 7, characterized in that: The display panel also includes a light conversion layer, which includes a filter layer arranged on the side of the light absorbing layer away from the driving backplane, and the filter layer includes a first color filter portion, a second color filter portion and a third color filter portion arranged in an array, and the orthographic projection of each of the first color filter portion, the second color filter portion and the third color filter portion on the driving backplane overlaps with the orthographic projection of the corresponding light source on the driving backplane.

10. The display panel according to claim 9, characterized in that: The light conversion layer further includes a first light adjustment layer, which is disposed on a side of the filter layer close to the driving backplane, and is used to transmit light emitted by the light source.

11. The display panel according to claim 10, characterized in that: The light conversion layer further includes a second light adjustment layer, which is disposed on a side of the filter layer away from the driving backplane, and is used to reflect light emitted by the luminous light source.

12. The display panel according to claim 11, characterized in that: The first light adjustment layer and the second light adjustment layer are Nb2O5 film layer, TiO2 film layer, SiN x Film, SiO x A composite structure in which at least two of the film layers are alternately stacked.

13. The display panel according to claim 11, characterized in that: The light source is a blue light source, and the second light adjustment layer is provided with an opening at a position corresponding to the filter portion that allows blue light to pass through.

14. The display panel according to claim 13, characterized in that: One of the first color filter section, the second color filter section and the third color filter section is a red filter section, one is a green filter section, and one is a blue filter section; the red filter section includes a red quantum dot material or a red phosphor material, the green filter section includes a green quantum dot material or a green phosphor material, and the blue filter section is a transparent material; The orthographic projection areas of the first color filter portion, the second color filter portion, and the third color filter portion on the driving backplane are larger than the orthographic projection areas of the corresponding lenses on the driving backplane.

15. The display panel according to claim 9, characterized in that: There are intervals between the color filter parts, and the filter layer includes a light shielding layer, and the light shielding layer is used to fill the intervals.

16. A display device, characterized in that: A display panel comprising any one of claims 1-15.

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