Optical lens and lighting device
By designing symmetrically arranged optical lenses, the light from a single light source component is divided into two symmetrical beams, solving the problem of existing equipment requiring multiple light sources, simplifying the equipment and reducing costs, while ensuring the double-sided wall washing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-31
AI Technical Summary
Existing light-emitting devices typically require at least two light sources to simultaneously wash two receiving surfaces, resulting in large device size, complex structure, and high energy consumption.
Design an optical lens comprising two symmetrically arranged lens sections, which, through the refraction and reflection of light, splits the light emitted by a single light source component into two symmetrical outgoing beams, which are then directed to two receiving surfaces, thereby achieving single-source double-sided wall washing.
Without compromising the wall-washing effect, the number of light source components was reduced, the equipment structure was simplified, production costs were lowered, and the illumination range and intensity were increased.
Smart Images
Figure CN224065318U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of light-emitting device technology, and in particular to an optical lens and lighting device. Background Technology
[0002] Wall washing is a lighting technique that uses spotlights or other light-emitting devices to evenly illuminate a receiving surface (such as a wall, ceiling, or floor), making the surface appear clean, tidy, and aesthetically pleasing.
[0003] In some application scenarios, it is necessary to simultaneously wash two different receiving surfaces (such as two adjacent walls, a wall and a ceiling, a wall and a floor, etc.). To meet the above wall washing requirements, common light-emitting devices usually have a light source and a lens. The light emitted by the light source shines onto the receiving surface after passing through the lens. The lens is used to expand the illumination angle and illumination range of the light source. However, since the current lens has a relatively limited effect on expanding the illumination angle and illumination range of the light source, at least two light sources are still required to meet the requirements of simultaneously washing two receiving surfaces. This results in a larger size, more complex structure, and higher energy consumption for the light-emitting device. Therefore, the above problems urgently need to be solved. Utility Model Content
[0004] This application provides an optical lens and an illumination device.
[0005] In a first aspect, embodiments of this application provide an optical lens having an optical axis; the optical lens includes two lens portions, which are respectively located on both sides of the optical axis and symmetrically arranged about the optical axis; each lens portion includes a first light guide portion and a second light guide portion connected together, the first light guide portions of the two lens portions are arranged relatively spaced apart, the second light guide portions of the two lens portions are connected, and an incident light cavity for accommodating a light source assembly is formed between the two lens portions; the light source assembly is disposed in the incident light cavity and emits light toward the lens portion; a first incident light beam in the light emitted by the light source assembly is transmitted through the first light guide portion to form a first outgoing light beam, at least a portion of the light in the first outgoing light beam has a propagation direction intersecting the optical axis and propagating in a direction away from the optical axis; a second incident light beam in the light emitted by the light source assembly is incident into the second light guide portion, and after total internal reflection in the second light guide portion, it is emitted to form a second outgoing light beam, at least a portion of the light in the second outgoing light beam has a propagation direction opposite to that of the second incident light beam.
[0006] Optionally, in some embodiments, a third incident beam of light emitted by the light source assembly is incident into the second light guide and is emitted after passing through the second light guide to form a third emitted beam. At least a portion of the light in the third emitted beam has a propagation direction that intersects with the optical axis and propagates in a direction away from the optical axis. At least a portion of the light in the third emitted beam does not coincide with the first emitted beam, and at least a portion of the light in the first emitted beam does not coincide with the third emitted beam.
[0007] Optionally, in some embodiments, the first light guide includes a first light-incident surface and a first light-outceasing surface that are opposite to each other. The first light-incident surface faces the light-incident cavity. The first incident light beam enters the interior of the first light guide through the first light-incident surface and exits the first light guide through the first light-outceasing surface to form a first emitted light beam.
[0008] Optionally, in some embodiments, the second light guide includes a second light-incident surface, a second light-exiting surface, and a third light-exiting surface; the second light-incident surface faces the light-incident cavity, and the second and third light-exiting surfaces are both located on the side of the second light guide away from the light-incident cavity; the third light-exiting surface is a convex curved surface, and the second light-exiting surface is disposed between the third light-exiting surface and the first light guide; the second incident beam enters the interior of the second light guide through the second light-incident surface and undergoes total internal reflection on the inner surface of the third light-exiting surface before exiting from the second light-exiting surface to form a second emitted beam.
[0009] Optionally, in some embodiments, the second light guide portion further includes a third light incident surface, which faces the light incident cavity and is located between the first light guide portion and the second light incident surface; the third incident beam enters the interior of the second light guide portion through the third light incident surface and exits through the third light emitting surface to form a third emitted beam.
[0010] Optionally, in some embodiments, the third light-emitting surfaces of the two lens portions are arranged adjacent to each other, and the connection between the two third light-emitting surfaces forms a groove that is recessed toward the light-entry cavity.
[0011] Optionally, in some embodiments, the optical lens extends along a specified direction, which is perpendicular to the optical axis; when a cross-section of the optical lens is made perpendicular to the specified direction along the optical axis, the cross-sectional profile of the third light-emitting surface is a curve, and the curvature of the cross-sectional profile of the third light-emitting surface gradually decreases in the direction from the optical axis to the first light guide.
[0012] Secondly, embodiments of this application also provide a lighting device, which includes a light source assembly and the aforementioned optical lens. The light source assembly is disposed in the light entrance cavity of the optical lens and emits light toward the lens portion of the optical lens.
[0013] Optionally, in some embodiments, the lighting device further includes a circuit board connected between the two first light guides of the optical lens, and the light source assembly is electrically connected to the side of the circuit board facing the light inlet cavity.
[0014] Optionally, in some embodiments, the lighting device further includes a light-diffusing element disposed within the light-entry cavity and covering the outer periphery of the light source assembly; and / or, the lighting device further includes a light-shielding element disposed on the side of the optical lens away from the light-entry cavity, covering the connection position of the two lens portions, and the light-shielding element is disposed on the same side as the light-emitting surface of the light source assembly.
[0015] This application provides an optical lens. When a single light source assembly emits light towards the lens portion of the optical lens, a first incident beam from the emitted light source assembly enters a first light guide portion, passes through the first light guide portion, and exits to form a first outgoing beam. At least a portion of the light in the first outgoing beam propagates in a direction intersecting the optical axis and propagating away from the optical axis. A second incident beam from the emitted light source assembly enters a second light guide portion, undergoes total internal reflection within the second light guide portion, and exits to form a second outgoing beam. At least a portion of the light in the second outgoing beam propagates in a direction opposite to the propagation direction of the second incident beam. Because the propagation directions of the first and second outgoing beams are different, when the first and second outgoing beams can simultaneously illuminate the same receiving surface, the illumination of the receiving surface by the light source assembly can be expanded. The optical lens provides a wide range of wall washing capabilities. Furthermore, since the optical lens has an optical axis, and two lens sections are arranged symmetrically about the optical axis, the first and second emitted beams will each form two beams. The two first emitted beams and the two second emitted beams are symmetrically arranged about the optical axis. The first and second emitted beams located on the first side of the optical axis can jointly illuminate the first receiving surface, and the first and second emitted beams located on the second side of the optical axis can jointly illuminate the second receiving surface. In summary, the aforementioned optical lens can refract and reflect the light emitted by a single light source component onto two different receiving surfaces to perform wall washing on both receiving surfaces, ensuring that each receiving surface has a sufficiently large wall washing range, thus guaranteeing that both receiving surfaces achieve the desired wall washing effect. Therefore, the lighting device using the aforementioned optical lens can reduce the number of light source components without compromising the wall washing effect, thereby simplifying the structure of the lighting device itself, reducing production costs, and facilitating the production and assembly of the lighting device. Attached Figure Description
[0016] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1This is a schematic diagram of the overall structure of the optical lens in some embodiments of this application.
[0018] Figure 2 yes Figure 1 The diagram shows the structure of the optical lens from another perspective.
[0019] Figure 3 This is a schematic diagram of the structure of the lighting device in some embodiments of this application.
[0020] Figure 4 yes Figure 3 The diagram shows the structure of the lighting device from another perspective.
[0021] Figure 5 yes Figure 3 The diagram shows the optical path of the lighting device emitting the first emitted beam toward the receiving surface.
[0022] Figure 6 yes Figure 3 The diagram shows the optical path of the lighting device emitting a second emitted beam toward the receiving surface.
[0023] Figure 7 yes Figure 3 The diagram shows the optical path of the lighting device emitting a third emitted beam toward the receiving surface.
[0024] Figure 8 yes Figure 3 The diagram shows the light path of the lighting device that emits light to the receiving surface to achieve a wall-washing effect.
[0025] Figure 9 yes Figure 3 The diagram shows the optical path of the lighting device in the luminous state.
[0026] Figure 10 This is a schematic diagram of the lighting device in some other embodiments of this application.
[0027] Labeling Explanation: 100, Optical lens; 10, Lens section; 101, First light guide section; 1011, First light incident surface; 1012, First light emitting surface; 102, Second light guide section; 1021, Second light incident surface; 1022, Second light emitting surface; 1023, Third light emitting surface; 1024, Third light incident surface; 103, Light incident cavity; 200, Illumination device; 20, Light source assembly; 201, First incident beam; 202, First emitted beam; 203, Second incident beam; 204, Second emitted beam; 205, Third incident beam; 206, Third emitted beam; 21, Circuit board; 22, Light homogenizer; 23, Light shield; 300, Receiving surface. Detailed Implementation
[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.
[0029] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or state relationship based on the orientation or state relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.
[0030] Furthermore, in addition to indicating location or state relationships, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0031] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0032] Furthermore, unless otherwise explicitly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0033] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. The specification and claims do not distinguish components based on differences in name, but rather on differences in function. For example, the term "comprising" used throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; "generally" means that those skilled in the art can solve the technical problem and basically achieve the technical effect within a certain margin of error.
[0034] Please see Figure 1 and Figure 2 Embodiments of this application provide an optical lens 100 for focusing on a light source assembly 20 (see...). Figure 3 and Figure 4 The emitted light is refracted and reflected to change the illumination angle of the light emitted by the light source component 20 and expand the illumination range.
[0035] The optical lens 100 has an optical axis O, which is approximately located at the center of the optical lens 100. The optical lens 100 includes two lens portions 10, which are located on opposite sides of the optical axis O and are symmetrically arranged about the optical axis O. Each lens portion 10 includes a connected first light guide portion 101 and a second light guide portion 102. It should be noted that the first light guide portion 101 and the second light guide portion 102 are both part of the structure of the lens portion 10; the first light guide portion 101 and the second light guide portion 102 can be two independent structures connected together, or they can be two parts of a single complete structure; there may or may not be a clear boundary line between the first light guide portion 101 and the second light guide portion 102. The second light guide portions 102 of the two lens portions 10 are connected, and the first light guide portions 101 of the two lens portions 10 are arranged at intervals relative to each other, forming an entrance cavity 103 between the two lens portions 10 for accommodating a light source assembly 20. The light source assembly 20 is disposed within the entrance cavity 103 and emits light toward the lens portion 10.
[0036] Please see Figure 3 , Figure 4 and Figure 5 The first incident beam 201 of the light emitted by the light source assembly 20 enters the first light guide section 101, and after passing through the first light guide section 101, it exits to form the first exit beam 202. It should be noted that the first incident beam 201 is a portion of the light emitted by the light source assembly 20, and the first exit beam 202 is the light formed after the first incident beam 201 enters and passes through the first light guide section 101. Figure 5The optical paths of the first incident beam 201 and the first exit beam 202 shown are for illustrative purposes only. At least a portion of the light rays in the first exit beam 202 propagate in a direction intersecting the optical axis O and moving away from the optical axis O.
[0037] Please see Figure 3 , Figure 4 and Figure 6 The second incident beam 203 of the light emitted by the light source assembly 20 enters the second light guide section 102, undergoes total internal reflection within the second light guide section 102, and then exits to form the second exit beam 204. It should be noted that the second incident beam 203 is a portion of the light emitted by the light source assembly 20, and the second exit beam 204 is the light formed by the second incident beam 203 entering the second light guide section 102, undergoing total internal reflection, and then exiting the second light guide section 102. Figure 6 The optical paths of the second incident beam 203 and the second exit beam 204 shown are for illustrative purposes only. At least a portion of the light rays in the second exit beam 204 propagate in the opposite direction to the propagation direction of the second incident beam 203.
[0038] When a single light source assembly 20 emits light toward the lens portion 10 of the optical lens 100, the first incident beam 201 of the light emitted by the light source assembly 20 enters the first light guide portion 101, passes through the first light guide portion 101, and exits to form a first outgoing beam 202. At least a portion of the light in the first outgoing beam 202 has a propagation direction that intersects the optical axis O and propagates in a direction away from the optical axis O. The second incident beam 203 of the light emitted by the light source assembly 20 enters the second light guide portion 102 and undergoes [something] within the second light guide portion 102. After total internal reflection, the light beam 204 is formed. At least a portion of the light in the second emitted beam 204 propagates in the same direction as the optical axis O and propagates away from the first light guide 101 and away from the second light guide 102. Since the propagation directions of the first emitted beam 202 and the second emitted beam 204 are different, when the first emitted beam 202 and the second emitted beam 204 can simultaneously illuminate the same receiving surface 300 (e.g., wall, ceiling, floor, etc.), the range of the light source assembly 20 on the receiving surface 300 can be expanded to wash the wall.
[0039] Further, please refer to Figure 5 and Figure 6Since the optical lens 100 has an optical axis O, and two lens portions 10 are provided, each located on one side of the optical axis O and symmetrically arranged about the optical axis O, the first emitted beam 202 and the second emitted beam 204 will each form two beams. The two first emitted beams 202 are symmetrically arranged about the optical axis O, and the two second emitted beams 204 are symmetrically arranged about the optical axis O. The first emitted beam 202 and the second emitted beam 204 located on the first side of the optical axis O can jointly illuminate the first receiving surface 300, and the first emitted beam 202 and the second emitted beam 204 located on the second side of the optical axis O can jointly illuminate the second receiving surface 300. In summary, the optical lens 100 can refract and reflect the light emitted by the single light source component 20 onto two different receiving surfaces 300 to perform wall washing on the two receiving surfaces 300, and can ensure that each receiving surface 300 has a sufficiently large wall washing range, that is, ensure that both receiving surfaces 300 can achieve the ideal wall washing effect.
[0040] In some embodiments, the optical lens 100 can be a rigid transparent material, such as acrylic, hard silicone, or polycarbonate. The optical lens 100 can also be a soft transparent material, such as soft silicone or soft plastic. The optical lens 100 can be manufactured using extrusion or injection molding. When the optical lens 100 is made of a rigid transparent material, it exhibits good rigidity and stability. When the optical lens 100 is made of a soft transparent material, it can be rolled up and packaged for convenient transportation and storage.
[0041] Please see Figure 3 , Figure 4 , Figure 7 and Figure 9 In some embodiments, a third incident beam 205 from the light emitted by the light source assembly 20 enters the second light guide portion 102, and after passing through the second light guide portion 102, exits to form a third exit beam 206. It should be noted that the third incident beam 205 is a portion of the light emitted by the light source assembly 20, and the third exit beam 206 is the light formed after the third incident beam 205 enters and passes through the second light guide portion 102. Figure 6The optical paths of the second incident beam 203 and the second exiting beam 204 shown are for illustrative purposes only. At least a portion of the light rays in the third exiting beam 206 propagate in a direction intersecting the optical axis O and moving away from it. At least a portion of the light rays in the third exiting beam 206 do not coincide with the first exiting beam 202, and at least a portion of the light rays in the first exiting beam 202 do not coincide with the third exiting beam 206. Specifically, the positional relationship between the first exiting beam 202 and the third exiting beam 206 can be achieved by controlling the incident angle of the third incident beam 205 entering the second light guide section 102 and the incident angle of the first incident beam 201 entering the first light guide section 101.
[0042] With the above configuration, since at least a portion of the light from the third emitted beam 206 does not overlap with the first emitted beam 202, and at least a portion of the light from the first emitted beam 202 does not overlap with the third emitted beam 206, there is partial overlap between the third emitted beam 206 and the first emitted beam 202, and there is no partial non-overlap. Therefore, the third emitted beam 206 can increase the illumination range and illumination angle of the first emitted beam 202, thereby increasing the illumination range and intensity of the light emitted by the single light source component 20 on the receiving surface 300, and thus achieving the purpose of improving the wall washing effect.
[0043] Please see Figure 4 and Figure 5 In some embodiments, the first light guide 101 includes a first light-incident surface 1011 and a first light-exiting surface 1012 that are opposite to each other. The first light-incident surface 1011 faces the light-incident cavity 103. The first incident light beam 201 enters the interior of the first light guide 101 via the first light-incident surface 1011 and exits the first light guide 101 via the first light-exiting surface 1012 to form a first emitted light beam 202. It should be noted that both the first light-incident surface 1011 and the first light-exiting surface 1012 are part of the surface of the first light guide 101. As a specific example, in this embodiment, both the first light-incident surface 1011 and the first light-exiting surface 1012 are planar, and are arranged substantially parallel to each other, and both are substantially parallel to the optical axis O. In other embodiments, the first light-incident surface 1011 may also be a curved surface or a folded surface formed by connecting multiple planes. The second light-incident surface 1021 may also be a curved surface or a folded surface formed by connecting multiple planes. There are no limitations on this.
[0044] With the above configuration, the first incident light surface 1011 and the first exit light surface 1012 can make the first incident light beam 201 propagate in a direction away from the optical axis O, so that the first exit light beam 202 can irradiate the receiving surface 300 and wash a part of the receiving surface 300.
[0045] Please see Figure 4 and Figure 6 In some embodiments, the second light guide 102 includes a second light incident surface 1021, a second light emitting surface 1022, and a third light emitting surface 1023. The second light incident surface 1021 faces the light incident cavity 103, and the second light emitting surface 1022 and the third light emitting surface 1023 are both located on the side of the second light guide 102 away from the light incident cavity 103. The third light emitting surface 1023 is a convex curved surface, and the second light emitting surface 1022 is disposed between the third light emitting surface 1023 and the first light guide 101. It should be noted that the second light incident surface 1021, the second light emitting surface 1022, and the third light emitting surface 1023 are all part of the surface of the second light guide 102. As a specific example, in this embodiment, both the second light-incident surface 1021 and the second light-exiting surface 1022 are planar. The second light-incident surface 1021 is approximately perpendicular to the optical axis O, and the second light-exiting surface 1022 is inclined relative to the optical axis O. The second light-exiting surface 1022 has a first side and a second side spaced apart. The first side is connected to the first light-exiting surface 1012, and the distance from the second side to the optical axis O is greater than the distance from the first side to the optical axis O. Therefore, the second light-exiting surface 1022 and the first light-exiting surface 1012 together form a notched structure, which can reduce the volume of the optical lens 100 and reduce the material cost of the optical lens 100. In other embodiments, the second light-incident surface 1021 can also be a curved surface, or a folded surface formed by connecting multiple planes. The second light-exiting surface 1022 can also be a curved surface, or a folded surface formed by connecting multiple planes; there is no limitation on this. The second incident beam 203 enters the interior of the second light guide 102 via the second incident surface 1021 and undergoes total internal reflection on the inner surface of the third light emitting surface 1023 before exiting from the second light emitting surface 1022 to form the second emitted beam 204.
[0046] With the above configuration, since the third light-emitting surface 1023 is a convex surface, the curvature of the third light-emitting surface 1023 can be designed so that the incident angle of the second incident beam 203 when it enters the second light guide 102 and illuminates the third light-emitting surface 1023 is greater than the critical angle. At this time, the light entering the second light guide 102 from the second incident beam 203 undergoes total internal reflection on the third light-emitting surface 1023, which can significantly change the illumination direction and finally exit from the second light-emitting surface 1022 to form the second emitted beam 204. At least a portion of the light in the second emitted beam 204 propagates in the same direction as the optical axis O and propagates in the direction away from the second light guide 102 from the first light guide 101, which can further expand the wall-washing range of the single light source assembly 20 on the receiving surface 300.
[0047] Please see Figure 4 and Figure 7In some embodiments, the second light guide 102 further includes a third light-incident surface 1024, which faces the light-incident cavity 103 and is located between the first light guide 101 and the second light-incident surface 1021. The third incident beam 205 enters the interior of the second light guide 102 via the third light-incident surface 1024 and exits via the third light-outceasing surface 1023 to form a third emitted beam 206. It should be noted that the third light-incident surface 1024 is a portion of the surface of the second light guide 102. As a specific example, in this embodiment, the third light-incident surface 1024 is a plane, inclined relative to the optical axis O, and has a third side and a fourth side spaced apart. The third side is connected to the second light-incident surface 1021, and the fourth side is connected to the first light-incident surface 1011. The distance from the third side to the optical axis O is less than the distance from the fourth side to the optical axis O. In other embodiments, the third light-incident surface 1024 may also be a curved surface, or a folded surface formed by connecting multiple planes, and there is no limitation thereto.
[0048] With the above configuration, the third incident beam 205 enters the interior of the second light guide 102 through the third light-incident surface 1024, then propagates inside the second light guide 102 and irradiates the third light-exiting surface 1023. After refraction by the third light-exiting surface 1023, it exits the second light guide 102 to form the third emitted beam 206. Since the third light-incident surface 1024 is located between the first light guide 101 and the second light-incident surface 1021, at least a portion of the light from the third emitted beam 206 is located between the first emitted beam 202 and the second emitted beam 204. This fills the blank area on the receiving surface 300 between the first emitted beam 202 and the second emitted beam 204, thereby increasing the illumination range of the light emitted by the single light source assembly 20 on the receiving surface 300 and achieving the purpose of improving the wall washing effect.
[0049] Please see Figure 3 and Figure 4 In some embodiments, the third light-emitting surfaces 1023 of the two lens portions 10 are arranged adjacent to each other, and the connection between the two third light-emitting surfaces 1023 forms a groove that is recessed toward the light-entry cavity 103. With the above arrangement, the portion at the connection between the two third light-emitting surfaces 1023 is the portion where the second incident beam 203 enters the interior of the second light guide portion 102 and undergoes total internal reflection on the third light-emitting surface 1023. Since the curvature of the third light-emitting surface 1023 at the above position is large, the incident angle of the light beam 203 that enters the second light guide portion 102 and illuminates the above portion of the third light-emitting surface 1023 will be greater than the critical angle, thereby causing total internal reflection, and finally exiting the second light guide portion 102 from the second light-emitting surface 1022.
[0050] Please see Figure 3 and Figure 4 In some embodiments, the optical lens 100 is elongated and extends along a designated direction X, which is perpendicular to the optical axis O. The designated direction X is approximately the length direction of the optical lens 100. A cross-section perpendicular to the designated direction X is taken along the optical axis O of the optical lens 100 (see reference...). Figure 4 The cross-sectional profile of the third light-emitting surface 1023 is curved, and the curvature of the cross-sectional profile of the third light-emitting surface 1023 gradually decreases in the direction from the optical axis O to the first light guide 101. With the above arrangement, the curvature of the cross-sectional profile of the third light-emitting surface 1023 near the optical axis O is larger. After the second incident beam 203 enters the second light guide 102, the incident angle of the light illuminating the above-mentioned part of the third light-emitting surface 1023 will be greater than the critical angle, thereby causing total internal reflection, and finally exiting the second light guide 102 from the second light-emitting surface 1022, so as to achieve the effect of significantly changing the light emission angle.
[0051] Please see Figure 3 , Figure 4 , Figure 8 and Figure 9 This application also provides a lighting device 200 for emitting light outwards to provide illumination and / or decorative effects. For example, it can be used to emit light onto a receiving surface 300 to wash the surface. The receiving surface 300 can specifically be a wall, ceiling, floor, or other structure. It should be noted that the lighting device 200 can emit light onto a single receiving surface 300 or simultaneously onto multiple receiving surfaces 300. For example, the lighting device 200 can emit light onto a single wall / ceiling / floor, or simultaneously onto two adjacent walls / ceilings, an adjacent single wall / floor, and an adjacent single wall. This embodiment does not limit the specific application scenario of the lighting device 200.
[0052] The lighting device 200 includes the aforementioned optical lens 100 and a light source assembly 20. The light source assembly 20 is disposed in the light entrance cavity 103 of the optical lens 100 and emits light toward the lens portion 10 of the optical lens 100. The light source assembly 20 can be any type of light emitter such as an LED light / strip, an OLED light / strip, or an incandescent light / strip. The light source assembly 20 can emit light containing at least one color. When the light emitted by the light source assembly 20 contains multiple colors, the light source assembly 20 can be a multi-color chip integrated lamp bead or a tightly mounted multi-color packaged lamp bead.
[0053] When the lighting device 200 is used to emit light to two adjacent receiving surfaces 300 for wall washing, the lighting device 200 is placed or installed at the junction of the two receiving surfaces 300, and the light source assembly 20 of the lighting device 200 emits light in a direction away from the junction of the two receiving surfaces 300. When the light source assembly 20 emits light toward the lens portion 10 of the optical lens 100, the first incident beam 201 of the light emitted by the light source assembly 20 passes through the first light-incident surface 1011 and enters the first light guide portion 101, and is emitted from the first light-exiting surface 1012 after passing through the first light guide portion 1011 to form a first emitted beam 202. At least a portion of the light in the first emitted beam 202 has a propagation direction that intersects with the optical axis O and propagates in a direction away from the optical axis O. The second incident beam 203 of the light emitted by the light source assembly 20 passes through the second light-incident surface 1021 and enters the second light guide portion 102, and is emitted from the second light-exiting surface 1022 after total internal reflection in the second light guide portion 102 to form a second emitted beam. The propagation direction of at least a portion of the light in the second emitted light beam 204 is consistent with the optical axis O and propagates in a direction away from the second light guide 102 and the first light guide 101. The third incident light beam 205 of the light emitted by the light source assembly 20 enters the second light guide 102 through the third incident surface 1024 and is emitted from the third light exit surface 1023 after passing through the second light guide 102 to form a third emitted light beam 206. The propagation direction of at least a portion of the light in the third emitted light beam 206 intersects with the optical axis O and propagates in a direction away from the optical axis O. At least a portion of the light in the third emitted light beam 206 does not coincide with the first emitted light beam 202, and at least a portion of the light in the first emitted light beam 202 does not coincide with the third emitted light beam 206. Since the propagation directions of the first emitted beam 202, the second emitted beam 204, and the third emitted beam 206 are different, the first emitted beam 202, the second emitted beam 204, and the third emitted beam 206 can simultaneously irradiate the same receiving surface 300, thereby expanding the range of wall washing of the receiving surface 300 by the light source assembly 20. Furthermore, since the optical lens 100 has an optical axis O, and there are two lens portions 10, which are respectively located on both sides of the optical axis O and symmetrically arranged about the optical axis O, the first emitted beam 202, the second emitted beam 204, and the third emitted beam 206 will each form two beams. The two first emitted beams 202 are symmetrically arranged about the optical axis O, the two second emitted beams 204 are symmetrically arranged about the optical axis O, and the two third emitted beams 206 are symmetrically arranged about the optical axis O. The first emitted beam 202, the second emitted beam 204, and the third emitted beam 206 located on the first side of the optical axis O can jointly illuminate the first receiving surface 300, and the first emitted beam 202, the second emitted beam 204, and the third emitted beam 206 located on the second side of the optical axis O can jointly illuminate the second receiving surface 300.In summary, the aforementioned lighting device 200, by incorporating an optical lens 100, refracts and reflects the light emitted by a single light source component 20 onto two different receiving surfaces 300 to perform wall washing on both surfaces 300. Furthermore, it ensures that each receiving surface 300 has a sufficiently large wall washing range, guaranteeing that both receiving surfaces 300 achieve the desired wall washing effect. Therefore, the aforementioned lighting device 200 can reduce the number of light source components 20 without compromising the wall washing effect, thereby simplifying the structure of the lighting device 200 itself, reducing production costs, and facilitating the production and assembly of the lighting device 200.
[0054] In some embodiments, the lighting device 200 further includes a circuit board 21 connected between the two first light guide portions 101 of the optical lens 100, and the light source assembly 20 electrically connected to the side of the circuit board 21 facing the light entrance cavity 103. With the above configuration, the circuit board 21 is electrically connected to a power supply to achieve an electrical connection between the power supply and the light source assembly 20, thereby enabling the light source assembly 20 to continuously emit light.
[0055] In some embodiments, the circuit board 21 is a flexible circuit board, and the optical lens 100 is made of a soft transparent material. In this case, the lighting device 200 can be rolled up, which facilitates the storage or transportation of the lighting device 200 without affecting its normal use after being unfolded.
[0056] In some embodiments, the lighting device 200 further includes a light-diffusing element 22, which is disposed within the light-entry cavity 103 and covers the outer periphery of the light source assembly 20. The light-diffusing element 22 can be a light-diffusing plate, a diffuser plate, or other component with a light-diffusing effect. With the above arrangement, when the light source assembly 20 emits light containing multiple colors, the multi-colored light can be mixed and uniformly emitted onto the optical lens 100 after passing through the light-diffusing element 22, thereby improving the color uniformity of the emitted light and thus making the wall-washing effect more aesthetically pleasing.
[0057] Please see Figure 10In some embodiments, the lighting device 200 further includes a light-shielding member 23, which is made of a substantially opaque material, such as metal, wood, dark-colored plastic, glass, or paint, ink, etc. The light-shielding member 23 is generally a long strip-shaped plate structure. The light-shielding member 23 is disposed on the side of the optical lens 100 opposite to the light-entry cavity 103, and covers the connection position of the two lens portions 10. Specifically, the light-shielding member 23 can be glued to the surface of the optical lens 100 or snap-fitted to the optical lens 100. With the above arrangement, when the lighting device 200 is in use, since the light-shielding member 23 is disposed on the same side as the light-emitting surface of the light source assembly 20, the light-shielding member 23 can block the light emitted from the connection position of the two lens portions 10 of the optical lens 100, thereby preventing the light emitted directly from the optical lens 100 by the light source assembly 20 from being directly observed by the user's eyes, thus avoiding glare and preventing discomfort to the user's eyes, thereby improving the user experience.
[0058] In some embodiments, the lighting device 200 further includes mounting end plates (not shown in the figure), which are connected to both ends of the optical lens 100. The mounting end plates can be made of flexible, soft materials, such as rubber or silicone. Specifically, two mounting end plates are provided, each connected to one end of the optical lens 100 in a specified direction X, and sealing the openings at both ends of the optical lens 100. The optical lens 100 and the mounting end plates can be connected by snap-fit, adhesive, or fasteners such as bolts. With the above configuration, the mounting end plates can seal the ports of the optical lens 100 to protect the internal structure of the optical lens 100.
[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. An optical lens characterized in that, The optical lens has an optical axis; the optical lens comprises two lens parts, and the two lens parts are symmetrically arranged on both sides of the optical axis; Each lens part comprises a first light guide part and a second light guide part connected to each other, the first light guide parts of the two lens parts are arranged opposite to each other, and the second light guide parts of the two lens parts are connected to each other, so as to form an entrance cavity for accommodating a light source assembly between the two lens parts; the light source assembly is arranged in the entrance cavity and emits light towards the lens parts; First incident light beams in the light emitted by the light source assembly are transmitted through the first light guide parts to form first exit light beams, and the propagation directions of at least part of the light in the first exit light beams intersect the optical axis and propagate away from the optical axis; Second incident light beams in the light emitted by the light source assembly are incident into the second light guide parts, are reflected in the second light guide parts, and then exit to form second exit light beams, and the propagation directions of at least part of the light in the second exit light beams are opposite to the propagation directions of the second incident light beams.
2. The optical lens of claim 1, wherein, Third incident light beams in the light emitted by the light source assembly are incident into the second light guide parts, are transmitted through the second light guide parts, and then exit to form third exit light beams, and the propagation directions of at least part of the light in the third exit light beams intersect the optical axis and propagate away from the optical axis, and at least part of the light in the third exit light beams does not coincide with at least part of the light in the first exit light beams, and at least part of the light in the first exit light beams does not coincide with at least part of the light in the third exit light beams.
3. The optical lens of claim 1, wherein, The first light guide part comprises a first light entrance surface and a first light exit surface facing away from each other, the first light entrance surface faces the entrance cavity, and the first incident light beams enter the interior of the first light guide part through the first light entrance surface and exit the first light guide part through the first light exit surface to form the first exit light beams.
4. The optical lens of claim 2, wherein, The second light guide part comprises a second light entrance surface, a second light exit surface and a third light exit surface; the second light entrance surface faces the entrance cavity, and the second light exit surface and the third light exit surface are located on the side of the second light guide part facing away from the entrance cavity; the third light exit surface is a convex curved surface, and the second light exit surface is arranged between the third light exit surface and the first light guide part; The second incident light beams enter the interior of the second light guide part through the second light entrance surface, are totally reflected on the inner surface of the third light exit surface, and then exit from the second light exit surface to form the second exit light beams.
5. The optical lens of claim 4, wherein, The second light guide part further comprises a third light entrance surface, the third light entrance surface faces the entrance cavity, and the third light entrance surface is located between the first light guide part and the second light entrance surface; The third incident light beams enter the interior of the second light guide part through the third light entrance surface and exit through the third light exit surface to form the third exit light beams.
6. The optical lens of claim 4, wherein, The third light exit surfaces of the two lens parts are adjacently arranged, and the connection part of the two third light exit surfaces forms a groove recessed towards the entrance cavity.
7. The optical lens of claim 4, wherein, The optical lens extends along a specified direction perpendicular to the optical axis; when a cross section of the optical lens is taken along the optical axis and perpendicular to the specified direction, a cross-sectional profile line of the third light-out surface is a curve, and the curvature of the cross-sectional profile line of the third light-out surface gradually decreases in a direction from the optical axis to the first light guide portion.
8. An illumination device, characterized by The lighting device comprises a light source assembly and the optical lens according to any one of claims 1 to 7, the light source assembly is arranged in the light inlet cavity of the optical lens and emits light rays towards the lens portion of the optical lens.
9. The illumination device of claim 8, wherein, The lighting device further comprises a circuit board connected between the two first light guide portions of the optical lens, and the light source assembly is electrically connected to one side of the circuit board facing the light inlet cavity.
10. The illumination device of claim 8, wherein, The lighting device further comprises a light homogenizing member arranged in the light inlet cavity, the light homogenizing member covers the outer periphery of the light source assembly; and / or, The lighting device further comprises a light shielding member arranged on a side of the optical lens away from the light inlet cavity, the light shielding member covers the connection position of the two lens portions, and the light shielding member is arranged on the same side as the light-out surface of the light source assembly.