Light-emitting device and display panel

Abstract

The application discloses a light-emitting device and a display panel. The light-emitting device comprises at least two light-emitting units, each of the light-emitting units comprises at least one nano light-emitting diode, and one lens is configured to correspond to the light-emitting angle of at least one light-emitting unit. In a plane perpendicular to the substrate, the center line of at least one light-emitting unit in the light-emitting unit corresponding to the lens deviates from the main optical axis of the lens. The light-emitting device and the display panel can improve the light-emitting brightness of the light-emitting device by arranging more nano light-emitting diodes, and the light-emitting brightness in the normal view can be improved by converging the light-emitting rays of the light-emitting unit by the lens. In addition, the light-emitting brightness in the side view can be compensated by deviating the center line of the light-emitting unit from the main optical axis of the lens, so that the light-emitting angle of the light-emitting unit is not excessively converged.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a light-emitting device and a display panel. Background Technology

[0002] Micro-LEDs have gained increasing attention in recent years due to their technological advantages of high brightness, high transmittance, and high contrast.

[0003] In the process of researching and practicing existing technologies, the inventors of this application discovered that the light emission angle of a micro LED is relatively large, and the luminous brightness of a single micro LED is limited. Summary of the Invention

[0004] This application provides a light-emitting device and a display panel that can improve the brightness when viewed directly while appropriately compensating for the brightness when viewed from the side.

[0005] This application provides a light-emitting device, which includes:

[0006] substrate;

[0007] At least two light-emitting units are disposed at intervals on the substrate, and each light-emitting unit includes at least one nano-light-emitting diode;

[0008] An encapsulation layer is configured to encapsulate the at least two light-emitting units;

[0009] At least one lens is configured to converge the light emission angle of the light-emitting unit, and the at least one lens is disposed on the side of the at least two light-emitting units away from the substrate;

[0010] In this embodiment, one of the lenses is configured to converge at least one of the light-emitting units at a light-emitting angle. On a plane perpendicular to the surface of the substrate, among the lens and the corresponding convergent light-emitting units, the center line of at least one of the light-emitting units deviates from the principal optical axis of the lens.

[0011] Optionally, in some embodiments of this application, at least two of the light-emitting units include a first light-emitting unit and a second light-emitting unit, and at least one of the lens covers includes a first lens and a second lens, wherein the first lens covers the first light-emitting unit and the second lens covers the second light-emitting unit;

[0012] On a plane perpendicular to the surface of the substrate, the center line of the first light-emitting unit is offset from the principal optical axis of the first lens. The distance between the principal optical axis of the first lens and the principal optical axis of the second lens is a first distance, and the distance between the center line of the first light-emitting unit and the center line of the second light-emitting unit is a second distance. The second distance is greater than or equal to the first distance.

[0013] Optionally, in some embodiments of this application, on a plane perpendicular to the substrate, the center line of the first light-emitting unit is disposed on the side of the principal optical axis of the first lens away from the second light-emitting unit, and the center line of the second light-emitting unit is disposed on the side of the principal optical axis of the second lens away from the first light-emitting unit.

[0014] Optionally, in some embodiments of this application, on a plane perpendicular to the substrate, the center line of the first light-emitting unit is disposed on the side of the principal optical axis of the first lens away from the second light-emitting unit; the center line of the second light-emitting unit is disposed on the side of the principal optical axis of the second lens close to the first light-emitting unit, or the center line of the second light-emitting unit coincides with the principal optical axis of the second lens.

[0015] Optionally, in some embodiments of this application, the thickness of the first lens and the thickness of the second lens are different; and / or, the aperture of the first lens and the aperture of the second lens are different.

[0016] Optionally, in some embodiments of this application, at least two of the light-emitting units include a first light-emitting unit and a second light-emitting unit, and a lens covers the first light-emitting unit and the second light-emitting unit;

[0017] The center line of the first light-emitting unit is located on the side of the principal optical axis of the lens away from the second light-emitting unit, and the center line of the second light-emitting unit is located on the side of the principal optical axis of the lens away from the first light-emitting unit.

[0018] Optionally, in some embodiments of this application, at least two of the light-emitting units include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit, and a lens covers the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit;

[0019] The center line of the third light-emitting unit coincides with the principal optical axis of the lens, the center line of the first light-emitting unit is located on the side of the third light-emitting unit away from the second light-emitting unit, and the center line of the second light-emitting unit is located on the side of the third light-emitting unit away from the first light-emitting unit.

[0020] Optionally, in some embodiments of this application, the first light-emitting unit and the second light-emitting unit are each configured to emit light independently.

[0021] Optionally, in some embodiments of this application, the light-emitting device further includes a color conversion layer, a reflective layer, and a light-shielding layer. The encapsulation layer has an opening, and the at least two light-emitting units are disposed within the opening. The reflective layer covers the portion of the substrate corresponding to the opening and the sidewall of the opening. The color conversion layer is disposed within the opening and covers the at least two light-emitting units. The light-shielding layer is disposed on the side of the encapsulation layer away from the substrate, and the light-shielding layer is disposed around the periphery of the opening.

[0022] In the light-emitting device viewed from above, the edge portion of the lens overlaps with the light-shielding layer, or the edge line of the lens is located within the inner circle of the light-shielding layer.

[0023] Optionally, in some embodiments of this application, the height of the portion of the reflective layer covering the opening sidewall is greater than the height of the color conversion layer, based on the surface of the substrate near the reflective layer.

[0024] Accordingly, this application also provides a display panel, which includes a driving substrate and a light-emitting device as described in any of the above embodiments, wherein the light-emitting device is disposed on the driving substrate.

[0025] In the light-emitting device and display panel of the present application embodiments, the light-emitting device includes at least two light-emitting units, each light-emitting unit includes at least one nano-light-emitting diode, and a lens is configured to converge the light emission angle of at least one light-emitting unit. On a plane perpendicular to the surface of the substrate, the center line of at least one of the light-emitting units that the lens and the corresponding convergent light-emitting unit deviates from the principal optical axis of the lens.

[0026] The light-emitting device and display panel of this application embodiment improve the light output brightness of the light-emitting device by setting more nano-light-emitting diodes, and the use of lenses to converge the light emitted by the light-emitting unit can improve the light output brightness when viewed directly; in addition, by offsetting the center line of the light-emitting unit from the principal optical axis of the lens, the light output angle of the light-emitting unit is not excessively converged, which can compensate for the light output brightness when viewed from the side. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first structure of the light-emitting device provided in the embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the back side of the substrate of the light-emitting device provided in the embodiments of this application;

[0029] Figure 3 This is a schematic diagram of the structure of the nanodiode of the light-emitting device provided in the embodiments of this application;

[0030] Figure 4This is a schematic diagram of a second structure of the light-emitting device provided in the embodiments of this application;

[0031] Figure 5 This is a schematic diagram of the third structure of the light-emitting device provided in the embodiments of this application;

[0032] Figure 6 This is a schematic diagram of the fourth structure of the light-emitting device provided in the embodiments of this application;

[0033] Figure 7 This is a schematic diagram of the fifth structure of the light-emitting device provided in the embodiments of this application;

[0034] Figure 8 This is a schematic diagram of the sixth structure of the light-emitting device provided in the embodiments of this application;

[0035] Figure 9 This is a schematic diagram of the seventh structure of the light-emitting device provided in the embodiments of this application;

[0036] Figure 10 This is a schematic diagram of the eighth structure of the light-emitting device provided in the embodiments of this application;

[0037] Figure 11 This is a schematic diagram of the ninth structure of the light-emitting device provided in the embodiments of this application;

[0038] Figure 12 This is a schematic diagram of the structure of the display panel provided in the embodiment of this application. Detailed Implementation

[0039] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific implementation methods described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, the embodiments can be combined with each other but will not be described in detail one by one. Unless otherwise stated, the directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device; the terms "first," "second," "third," etc. are only used as markings and do not impose numerical requirements or establish a sequence.

[0040] This application provides a light-emitting device and a display panel, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0041] Please refer to Figure 1 This application provides a light-emitting device 100, which includes a substrate 11, a light-emitting unit 12, an encapsulation layer 13, and a lens 14.

[0042] At least two light-emitting units 12 are disposed at intervals on the substrate 11. Each light-emitting unit 12 includes at least one nano-light-emitting diode 121.

[0043] The encapsulation layer 13 is configured to encapsulate the at least two light-emitting units 12.

[0044] At least one lens 14 is configured to converge the light emission angle of the light-emitting unit 12. The at least one lens 14 is disposed on the side of the at least two light-emitting units 12 away from the substrate 11;

[0045] In this configuration, a lens 14 is configured to converge the light emission angle of at least one light-emitting unit 12. On a plane perpendicular to the surface of the substrate 11, the center line z1 of at least one light-emitting unit 12 is offset from the principal optical axis z2 of the lens 14.

[0046] The light-emitting device 100 of this application embodiment improves the light output brightness by setting more nano-light-emitting diodes 121, and uses a lens 14 to converge the light output of the light-emitting unit 12, which can improve the light output brightness when viewed directly; in addition, by offsetting the center line z1 of the light-emitting unit 12 from the principal optical axis z2 of the lens 14, the light output angle of the light-emitting unit 12 is not excessively converged, which can compensate for the light output brightness when viewed from the side.

[0047] It is understandable that the principal optical axis z2 of lens 14 is a straight line passing through the center of the two surfaces (light-emitting surface and light-receiving surface) of lens 14, and this straight line also passes through the focal point of lens 14.

[0048] Optionally, the substrate 11 may include circuit traces to connect to the light-emitting unit 12. In addition, a bonding pad 111 is provided on the side of the substrate 11 away from the light-emitting unit 12. The bonding pad 111 is configured to connect to an external device to receive current and drive the light-emitting device 100 to emit light.

[0049] Please refer to Figure 2 The bonding pad 111 may include an anode pad 11a and a cathode pad 11b, with one anode pad 11a connected to one light-emitting unit 12. One cathode pad 11b connects all light-emitting units 12.

[0050] An anode pad 11a is connected to a light-emitting unit 12, meaning that each light-emitting unit 12 is configured to emit light independently, allowing each light-emitting unit 12 to be driven individually for precise control.

[0051] In some embodiments, at least two light-emitting units 12 may be connected to an anode pad 11a, such as a portion of the light-emitting units 12 being connected to an anode pad 11a, so that the portion of the light-emitting units 12 emit light together; or all the light-emitting units 12 may be connected to an anode pad 11a, so that all the light-emitting units 12 emit light together.

[0052] Optionally, the at least two light-emitting units 12 can be two, three, four or more light-emitting units 12. The light-emitting unit 12 includes at least one nano-light-emitting diode 121, and the light-emitting unit 12 can include one, two, three, four or more nano-light-emitting diodes 121; when the light-emitting unit 12 includes at least two nano-light-emitting diodes 121, the multiple nano-light-emitting diodes 121 can be connected in series or in parallel to form a whole.

[0053] Optional, please refer to Figure 3 The nano-light-emitting diode 121 includes a diode body 121a and a protective layer 121b covering the diode body 121a. Both sides of the diode body 121a are exposed to facilitate electrical connection to external devices.

[0054] Optionally, lens 14 can be a condenser lens, such as a plano-convex lens, a biconvex lens, or other lenses.

[0055] In some embodiments of this application, at least two light-emitting units 12 include a first light-emitting unit 12a and a second light-emitting unit 12b. At least one lens 14 covers a first lens 14a and a second lens 14b, with the first lens 14a covering the first light-emitting unit 12a and the second lens 14b covering the second light-emitting unit 12b.

[0056] On a plane perpendicular to the surface of the substrate 11, the center line z1 of the first light-emitting unit 12a is offset from the principal optical axis z2 of the first lens 14a. The distance between the principal optical axis z2 of the first lens 14a and the principal optical axis z2 of the second lens is a first distance H1. The distance between the center line z1 of the first light-emitting unit 12a and the center line z1 of the second light-emitting unit 12b is a second distance H2. The second distance H2 is greater than or equal to the first distance H1.

[0057] It is understandable that setting the second distance H2 to be greater than or equal to the first distance H1 can appropriately increase the side-view brightness of the light-emitting device 100 and avoid excessive front-view brightness of the light-emitting device 100, which would cause a grainy display.

[0058] In some embodiments of this application, on a plane perpendicular to the surface of the substrate 11, the center line z1 of the first light-emitting unit 12a is disposed on the side of the principal optical axis z2 of the first lens 14a away from the second light-emitting unit 12b, and the center line z1 of the second light-emitting unit 12b is disposed on the side of the principal optical axis z2 of the second lens 14b away from the first light-emitting unit 12a.

[0059] It is understandable that the second distance H2 is greater than the first distance H1, which can increase the light emission range of the light-emitting device 100, while the first light-emitting unit 12a and the second light-emitting unit 12b are far apart from each other, which can further compensate for the side-view brightness and improve the uniformity of light emission on both sides.

[0060] In some embodiments of this application, the first light-emitting unit 12a and the second light-emitting unit 12b are each configured to emit light independently.

[0061] The first light-emitting unit 12a and the second light-emitting unit 12b can emit light independently, giving the light-emitting device 100 two light-emitting modes: a single light-emitting mode (one light-emitting unit emits light while the other does not) and a full light-emitting mode. In the full light-emitting mode, a wide viewing angle can be achieved; in the single light-emitting mode, one-sided viewing can be achieved, providing a one-sided privacy protection effect.

[0062] For example, please refer to Figure 1 In single light-emitting mode, if the first light-emitting unit 12a emits light and the second light-emitting unit 12b does not emit light, then left-side privacy protection can be achieved; if the second light-emitting unit 12b emits light and the first light-emitting unit 12a does not emit light, then right-side privacy protection can be achieved.

[0063] Optionally, in some embodiments of this application, the first light-emitting unit 12a and the second light-emitting unit 12b may also be set in other different positions.

[0064] for example Figure 4 , Figure 4 This diagram illustrates a second structural design of the light-emitting device 100 provided in an embodiment of this application. For example... Figure 4 As shown, on a plane perpendicular to the surface of the substrate 11, the center line z1 of the first light-emitting unit 12a is located on the side of the principal optical axis z2 of the first lens 14a away from the second light-emitting unit 12b, and the center line z1 of the second light-emitting unit 12b is located on the side of the principal optical axis z2 of the second lens 14b close to the first light-emitting unit 12a.

[0065] In other words, the first light-emitting unit 12a and the second light-emitting unit 12b are each located on the same side of the corresponding principal optical axis z2. For example, the first light-emitting unit 12a is located to the left of the principal optical axis z2 of the first lens 14a, and the second light-emitting unit 12b is located to the left of the principal optical axis z2 of the second lens 14b; or, the first light-emitting unit 12a is located to the right of the principal optical axis z2 of the first lens 14a, and the second light-emitting unit 12b is located to the right of the principal optical axis z2 of the second lens 14b.

[0066] The first light-emitting unit 12a and the second light-emitting unit 12b are each located on the same side (e.g., the left side) of the main optical axis z2. Since the angle at which the light rays of the light-emitting unit 12, which is farther away from the focal point of the lens 14, are deflected by the lens 14 will increase, the light emission angle of the light-emitting device 100 on the corresponding side (e.g., the left side) will be appropriately reduced, while the light emission brightness on the other side (e.g., the right side) of the light-emitting device 100 will be increased, thus achieving unilateral privacy protection.

[0067] Based on this, both single-light-emitting mode and full-light-emitting mode can achieve unilateral privacy protection. The single-light-emitting mode allows for adjustment of the light brightness and appropriate expansion of the light-emitting angle of the light-emitting device 100.

[0068] For example Figure 5 , Figure 5 This diagram illustrates a third structural design of the light-emitting device 100 provided in an embodiment of this application. For example... Figure 5 As shown, the center line z1 of the first light-emitting unit 12a is located on the side of the principal optical axis z2 of the first lens 14a away from the second light-emitting unit 12b, and the center line z1 of the second light-emitting unit 12b coincides with the principal optical axis z2 of the second lens 14b.

[0069] In other words, the second lens 14b has the best focusing and collimation effect on the second light-emitting unit 12b to ensure the light output efficiency at the positive viewing angle, while the first light-emitting unit 12a is offset from the principal optical axis z2 of the first lens 14a and far away from the second light-emitting unit 12b, so as to appropriately expand the light emission angle of the light-emitting device 100 and compensate for the side viewing brightness.

[0070] In a single light-emitting mode, if only the first light-emitting unit 12a emits light, unilateral privacy protection can be achieved; if only the second light-emitting unit 12b emits light, the light emission uniformity of the light-emitting device 100 can be achieved, and bilateral large-angle privacy protection can be achieved.

[0071] Figure 6 This diagram illustrates a fourth structural design of the light-emitting device 100 according to an embodiment of this application. Based on any of the above embodiments, different light-emitting units 12 are provided with different lenses 14.

[0072] In some embodiments of this application, the thickness h1 of the first lens 14a and the thickness h1 of the second lens 14b are different; and / or, the aperture h2 of the first lens 14a and the aperture h2 of the second lens 14b are different.

[0073] It is understandable that the aperture h2 refers to the maximum effective diameter of the lens. The thickness h1 and aperture h2 of the first lens 14a and the second lens 14b can achieve different deflection intensities for light by the first lens 14a and the second lens 14b, so that the side with stronger deflection forms strong privacy protection, while the other side forms weak privacy protection, and the side with weak privacy protection can compensate for the brightness of the positive viewing angle.

[0074] In this context, given the same aperture of lens 14, a greater thickness results in a more convex lens with a smaller radius of curvature, thus increasing the intensity of light deflection. In other words, different radii of curvature on the light-emitting surface allow for varying degrees of light deflection. Conversely, with the same thickness, a smaller aperture of lens 14 results in a smaller radius of curvature, also increasing the intensity of light deflection. Therefore, different radii of curvature on the light-emitting surface allow for varying degrees of light deflection. Thus, the light deflection intensity of lens 14 can be adjusted by changing its thickness h1 and aperture h2, enabling the creation of lenses 14 with different light deflection intensities to achieve both strong and weak privacy protection for the light-emitting device 100.

[0075] Optionally, in some embodiments, the intensity of the light deflection angle can be adjusted by changing the distance between the light-emitting surface of the light-emitting unit 12 and the focal point of the lens 14 in the thickness direction. For example, in the thickness direction of the light-emitting device 100, the light-emitting surface of the first light-emitting unit 12a is lower than the focal point of the first lens 14a, and the light-emitting surface of the second light-emitting unit 12b is higher than the focal point of the second lens 14b.

[0076] It is understandable that the light-emitting surface refers to the plane of the light-emitting unit 12 that is away from the substrate 11. Since the light-emitting surface of the first light-emitting unit 12a is lower than the focal point and the light-emitting surface of the second light-emitting unit 12b is lower than the focal point, the first lens 14a deflects the light from the first light-emitting unit 12a more strongly, and the second lens 14b deflects the light from the second light-emitting unit 12b less strongly. Based on this, strong privacy protection and weak privacy protection can be achieved for the light-emitting device 100.

[0077] Figure 7 The diagram shown is a fifth structural schematic of the light-emitting device 100 according to an embodiment of this application.

[0078] Please refer to Figure 7In some embodiments of this application, based on any of the above embodiments, the light-emitting device 100 further includes a color conversion layer 15, a reflective layer 16, and a light-shielding layer 17, and the encapsulation layer 13 is provided with an opening 131. The at least two light-emitting units 12 are disposed within the opening 131, and the reflective layer 16 covers the portion of the substrate 11 corresponding to the opening 131 and the sidewall of the opening 131. The color conversion layer 15 is disposed within the opening 131 and covers the at least two light-emitting units 12. The light-shielding layer 17 is disposed on the side of the encapsulation layer 13 away from the substrate 11. The light-shielding layer 17 is disposed around the periphery of the opening 131.

[0079] In the light-emitting device 100 viewed from above, the edge line of the lens 14 is located in the inner circle of the light-shielding layer 17.

[0080] Understandably, the color conversion layer 15, positioned within the opening 131, not only reduces the thickness of the light-emitting device 100 but also allows for the configuration of multiple light-emitting devices 100 emitting different colors of light using a single light-emitting unit 12. For example, if the light-emitting unit 12 is configured to emit blue light, the light-emitting device 100 will emit red light when the color conversion layer 15 is a red color conversion layer, and green light when the color conversion layer 15 is a green color conversion layer. If the light-emitting device 100 needs to emit blue light, the light-emitting unit 12 can be directly encapsulated by the encapsulation layer 13.

[0081] Secondly, the reflective layer 16 covers the bottom and sidewalls of the opening 131, enabling efficient utilization of the light emitted by the light-emitting unit 12 and improving the light emission efficiency. Simultaneously, by covering the sidewalls of the opening 131 with the reflective layer 16, the light emission angle of the light-emitting device 100 can be further reduced, improving the privacy protection effect.

[0082] Optionally, the reflective layer 16 can be a transparent photoresist material doped with reflective particles, such as titanium oxide or aluminum oxide particles; or it can be a reflective metal layer.

[0083] In addition, the light-shielding layer 17 can not only prevent light crosstalk between different light-emitting devices 100, but also improve display contrast and cover the border area of ​​the light-emitting device 100.

[0084] Optionally, the thickness of the color conversion layer 15 is lower than the thickness of the encapsulation layer 13, so that another encapsulation layer 13 covers the color conversion layer 15 to protect the color conversion layer 15 and reduce the risk of the color conversion layer 15 being attacked by water and oxygen.

[0085] Optionally, the inner ring of the light-shielding layer 17 is filled with a flat layer that is flush with the light-shielding layer 17 to facilitate the placement of the lens 14.

[0086] Optionally, in some embodiments of this application, based on the surface of the substrate 11 near the reflective layer 16, the height g of the portion of the reflective layer 16 covering the sidewall of the opening 131 is greater than the height g of the color conversion layer 15.

[0087] Understandably, the height g of the reflective layer 16 is greater than the height g of the color conversion layer 15, which increases the restriction of large-angle light by the reflective layer 16 and further improves the privacy protection effect.

[0088] Figure 8 The diagram shown is a sixth structural schematic of the light-emitting device 100 according to an embodiment of this application.

[0089] Please refer to Figure 8 In some embodiments of this application, based on any of the above embodiments, the light-emitting unit 12 further includes a third light-emitting unit 12c, which is disposed between the first light-emitting unit 12a and the second light-emitting unit 12b, and a third lens 14c is correspondingly disposed on the third light-emitting unit 12c. The center line z1 of the third light-emitting unit 12c coincides with the principal optical axis z2 of the third lens 14c.

[0090] The arrangement of the third light-emitting unit 12c and the third lens 14c can improve the brightness of the light-emitting device 100 from the positive viewing angle.

[0091] In some embodiments, the aperture of the third lens 14c is larger than that of the first lens 14a and the second lens 14b to improve the luminous brightness at the positive viewing angle. The apertures of the first lens 14a and the second lens 14b are equal, and the radii of curvature of their light-emitting surfaces are also equal to improve the uniformity of light emission from the left and right sides of the light-emitting device 100.

[0092] Figure 9 This diagram illustrates a seventh structural representation of the light-emitting device 100 according to an embodiment of this application. The difference between this embodiment and the previous embodiments is that a lens 14 is used to simultaneously converge the light emitted from at least two light-emitting units 12.

[0093] exist Figure 9 In order to avoid redundancy, only the parts that are different from the above embodiments will be described.

[0094] Please refer to Figure 9 In some embodiments of this application, at least two light-emitting units 12 include a first light-emitting unit 12a and a second light-emitting unit 12b, and a lens 14 covers the first light-emitting unit 12a and the second light-emitting unit 12b.

[0095] The center line z1 of the first light-emitting unit 12a is located on the side of the principal optical axis z2 of the lens 14 away from the second light-emitting unit 12b, and the center line z1 of the second light-emitting unit 12b is located on the side of the principal optical axis z2 of the lens 14 away from the first light-emitting unit 12a.

[0096] It is understandable that using a lens 14 to simultaneously converge the light emitted by at least two light-emitting units 12 can save on the assembly of the lens 14 and also save time when offsetting the arrangement of the light-emitting units 12.

[0097] In addition, using a larger lens 14 to cover at least two light-emitting units 12 can more comprehensively converge the light flux of a larger area and improve the convergence effect.

[0098] Figure 10 The diagram shown is an eighth structural schematic of the light-emitting device 100 according to an embodiment of this application. Figure 10 What is shown is Figure 9 Based on the corresponding embodiment, a color conversion layer 15, a reflective layer 16, and a light-shielding layer 17 are provided.

[0099] The difference between this embodiment and the above embodiment is that, in the light-emitting device 100 viewed from above, the edge portion of the lens 14 overlaps with the light-shielding layer 17.

[0100] The overlapping of the edge portion of the lens 14 and the light-shielding layer 17 can save space and further improve the privacy protection effect.

[0101] Figure 11 This diagram illustrates a ninth structural embodiment of the light-emitting device 100 according to this application. The difference between this embodiment and the previous embodiments is that a lens 14 is used to simultaneously converge the emitted light from at least two light-emitting units 12.

[0102] exist Figure 11 In order to avoid redundancy, only the parts that are different from the above embodiments will be described.

[0103] Please refer to Figure 11 In some embodiments of this application, at least two light-emitting units 12 include a first light-emitting unit 12a, a second light-emitting unit 12b, and a third light-emitting unit 12c, and a lens 14 covers the first light-emitting unit 12a, the second light-emitting unit 12b, and the third light-emitting unit 12c.

[0104] The center line z1 of the third light-emitting unit 12c coincides with the principal optical axis z2 of the lens 14. The center line z1 of the first light-emitting unit 12a is located on the side of the third light-emitting unit 12c away from the second light-emitting unit 12b. The center line z1 of the second light-emitting unit 12b is located on the side of the third light-emitting unit 12c away from the first light-emitting unit 12a.

[0105] Understandably, adding a third light-emitting unit 12c can improve the light output brightness of the light-emitting device at a positive viewing angle of 100°.

[0106] Figure 12The diagram shown is a structural schematic of the display panel 1000 according to an embodiment of this application.

[0107] Please refer to Figure 12 Accordingly, this application also provides a display panel 1000, which includes a driving substrate 200 and a light-emitting device 100 as described in any of the above embodiments, wherein the light-emitting device 100 is disposed on the driving substrate 200.

[0108] It should be noted that the driving substrate 200 is configured to drive the light-emitting device 100 to emit light. Furthermore, the structure of the light-emitting device 100 of the display panel 1000 in this embodiment is similar to or the same as the structure of the light-emitting device 100 in any of the above embodiments; please refer to [reference needed] for details. Figures 1 to 11 The relevant explanations will not be repeated here.

[0109] In the display panel 100 of this application embodiment, the light-emitting device 100 includes at least two light-emitting units 12, each light-emitting unit 12 includes at least one nano-light-emitting diode 121, and a lens 14 is configured to converge the light emission angle of at least one light-emitting unit 12. On a plane perpendicular to the plate surface of the substrate 11, the center line z1 of at least one light-emitting unit 12 of the lens 14 and the corresponding converged light-emitting unit 12 is deviated from the principal optical axis z2 of the lens 14.

[0110] The display panel 1000 of this application improves the light output brightness of the light-emitting device by setting more nano-light-emitting diodes 121, and uses a lens 14 to converge the light output of the light-emitting unit 12, which can achieve a large-angle privacy protection effect; in addition, by using the center line z1 of the light-emitting unit 12 to deviate from the principal optical axis z2 of the lens 14, the light output angle of the light-emitting unit is not excessively converged, which can compensate for the light output brightness of the side viewing angle.

[0111] The above provides a detailed description of a light-emitting device and display panel provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A light emitting device, characterized by, The light emitting device comprises: a substrate; at least two light emitting units arranged at intervals on the substrate, each of the light emitting units comprising at least one nano light emitting diode; an encapsulation layer configured to encapsulate the at least two light emitting units; at least one lens configured to converge the light emitting angle of the light emitting units, the at least one lens being arranged on the side of the at least two light emitting units away from the substrate; wherein one of the lenses is configured to correspond to converging the light emitting angle of at least one of the light emitting units; the at least two light emitting units comprise a first light emitting unit and a second light emitting unit, and the at least one lens comprises a first lens and a second lens, the first lens covering the first light emitting unit and the second lens covering the second light emitting unit; in a plane perpendicular to the surface of the substrate, the center line of the first light emitting unit is arranged on the side of the main optical axis of the first lens away from the second light emitting unit, and the center line of the second light emitting unit is arranged on the side of the main optical axis of the second lens away from the first light emitting unit.

2. The light emitting device of claim 1, wherein, In a plane perpendicular to the surface of the substrate, the center line of the first light emitting unit deviates from the main optical axis of the first lens, the distance between the main optical axis of the first lens and the main optical axis of the second lens is a first distance, and the distance between the center line of the first light emitting unit and the center line of the second light emitting unit is a second distance, the second distance being greater than or equal to the first distance.

3. The light emitting device of claim 2, wherein, The thickness of the first lens and the thickness of the second lens are different; and / or, the aperture of the first lens and the aperture of the second lens are different.

4. The light emitting device of claim 1, wherein The at least two light emitting units further comprise a third light emitting unit, and the at least one lens comprises a third lens, the third light emitting unit being arranged between the first light emitting unit and the second light emitting unit, the third light emitting unit being correspondingly arranged with the third lens, and the center line of the third light emitting unit coincides with the main optical axis of the third lens.

5. The light emitting device of claim 4, wherein, The aperture of the third lens is greater than the apertures of the first lens and the second lens, the apertures of the first lens and the second lens are equal, and the radii of curvature of the light emitting surfaces of the first lens and the second lens are equal.

6. The light-emitting device according to any one of claims 1 to 3, wherein The first light emitting unit and the second light emitting unit are each configured to independently emit light.

7. The light-emitting device according to any one of claims 1 to 3, wherein The light emitting device further comprises a color conversion layer, a reflective layer and a light shielding layer, the encapsulation layer is provided with an opening, the at least two light emitting units are arranged in the opening, the reflective layer covers the part of the substrate corresponding to the opening and the sidewall of the opening, the color conversion layer is arranged in the opening and covers the at least two light emitting units, and the light shielding layer is arranged on the side of the encapsulation layer away from the substrate, and the light shielding layer is arranged around the periphery of the opening; In the light emitting device in the top view, the edge part of the lens is arranged overlapping the light shielding layer, or the edge line of the lens is located in the inner ring of the light shielding layer.

8. The light emitting device of claim 7, wherein, Based on the surface of the substrate close to the reflective layer, the height of the part of the reflective layer covering the sidewall of the opening is greater than the height of the color conversion layer.

9. A light-emitting device, characterized in that, The light emitting device comprises: a substrate; at least two light emitting units, which are arranged on the substrate in a spaced manner, each of the light emitting units comprising at least one nano light emitting diode; an encapsulation layer configured to encapsulate the at least two light emitting units; at least one lens configured to converge light emitting angles of the light emitting units, the at least one lens being arranged on a side of the at least two light emitting units away from the substrate; wherein one of the lenses is configured to correspond to converging light emitting angles of at least one of the light emitting units, in a plane perpendicular to a surface of the substrate, the one of the lenses is offset from a main optical axis of the one of the lenses to a center line of at least one of the light emitting units corresponding to the converging light emitting angles; the at least two light emitting units comprise only a first light emitting unit and a second light emitting unit, the one of the lenses covering the first light emitting unit and the second light emitting unit; the center line of the first light emitting unit is located on a side of the main optical axis of the one of the lenses away from the second light emitting unit, and the center line of the second light emitting unit is located on a side of the main optical axis of the one of the lenses away from the first light emitting unit.

10. The light emitting device of claim 9, wherein, The first light emitting unit and the second light emitting unit are each configured to independently emit light.

11. The light emitting device of claim 9, wherein, The light emitting device further comprises a color conversion layer, a reflective layer and a light shielding layer, the encapsulation layer is provided with an opening, the at least two light emitting units are arranged in the opening, the reflective layer covers a portion of the substrate corresponding to the opening and a sidewall of the opening, the color conversion layer is arranged in the opening and covers the at least two light emitting units, and the light shielding layer is arranged on a side of the encapsulation layer away from the substrate, the light shielding layer being arranged around a periphery of the opening. In the light emitting device in a top view, an edge portion of the lens is arranged overlapping the light shielding layer, or an edge line of the lens is located in an inner circle of the light shielding layer.

12. The light emitting device of claim 11, wherein, Based on a surface of the substrate close to the reflective layer, a height of the portion of the reflective layer covering the sidewall of the opening is greater than a height of the color conversion layer.

13. A display panel, characterized by The light emitting device as claimed in any one of claims 1-12 is arranged on a driving substrate.

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