A polarizing lens and an illuminating device

Abstract

The application relates to a polarized lens and a lighting device, the polarized lens comprising an optical lens, a plurality of annular arrays being arranged on the optical lens and being distributed in a concentric ring shape on the optical lens; each annular array is formed by a plurality of spherical cap optical structures along the same circumferential array; a spherical cap surface of the spherical cap optical structure is an outlight surface, a concave point is arranged on the spherical cap surface, the concave point is offset from a center point of the spherical cap surface by a preset distance in a direction away from a center of the concentric ring along a radial direction of the concentric ring, an inlight side of the spherical cap optical structure is arranged opposite to the spherical cap surface, and the inlight side of the spherical cap optical structure is provided with a light source accommodating portion. The curved surface structure of the concave point close to one side of the outer side of the concentric ring makes the angle formed by the light irradiated thereto and the normal line larger, the angle of light deflection is larger, more light irradiates to the edge area, the light intensity incident to the edge is improved, and the problems of the center being too bright and the edge being too dark are improved.

Description

Technical Field

[0001] This application relates to the field of polarizing lens technology, specifically to a polarizing lens and an illumination device. Background Technology

[0002] LED chips are essentially Lambertian light sources, and their luminous intensity decreases according to a cosine law as the emission angle increases. Directly using bare chips will result in severe central brightness and edge darkness on the illuminated surface, leading to extremely low illuminance uniformity.

[0003] To improve the light distribution characteristics of LED lamps and increase the uniformity of illuminance, a secondary optical lens is usually placed in front of the LED chip. The secondary optical lens refracts, reflects, or scatters the light emitted by the LED, redistributing the light originally concentrated in the central area to the edge area, thereby achieving uniform illumination.

[0004] In existing technologies, in order to match large-sized lampshades and large illumination areas, the sizes of the light source board and lens also need to be proportionally enlarged; otherwise, problems such as small light spots, low edge illuminance, and light spots failing to cover the edges of the lampshade will occur. Utility Model Content

[0005] This utility model aims to provide a polarizing lens that can redistribute the light from LED lamps, which is originally concentrated in the central area, to the edge area, thereby achieving uniform illumination. The technical solution adopted includes: A polarizing lens includes an optical lens, wherein the optical lens has multiple annular arrays arranged in a concentric ring on the optical lens; each annular array is formed by multiple spherical optical structures arranged along the same circumference. The spherical surface of the spherical optical structure is the light-emitting surface. A concave point is provided on the spherical surface, and this concave point is offset by a predetermined distance from the center point of the concentric rings along the radial direction of the concentric rings. The light-incident side of the spherical optical structure is positioned opposite to the spherical surface, and the light-incident side of the spherical optical structure is provided with a light source receiving portion.

[0006] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the spherical crown optical structure is a hemispherical optical structure.

[0007] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the light-incident side of the spherical crown-shaped optical structure is further provided with a conical recess that communicates with the light source receiving part, and the tip of the conical recess points to the recess.

[0008] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: along the direction from the outside to the inside of the concentric rings, the radial distance between two radially adjacent ring arrays increases sequentially.

[0009] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: multiple ring arrays are distributed in a concentric ring shape with the geometric center of the optical lens as the center.

[0010] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the optical lens and the spherical optical structure are integrally formed.

[0011] This application also proposes a lighting device, including a housing, a light-transmitting portion thereon, a light-emitting element and a polarizing lens as described above inside the housing, the polarizing lens being distributed on the side of the light-emitting element near the light-transmitting portion, the light-emitting element having a plurality of point light sources, and each point light source being distributed within the light source receiving portion.

[0012] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the outer shell is square or round.

[0013] The beneficial effects of this utility model are as follows: In this application, the concave point is offset from the center point of the spherical cap surface by a predetermined distance along the radial direction of the concentric ring away from the center of the concentric ring. By utilizing the curved surface structure of the side of the concave point close to the outer side of the concentric ring, the angle formed by the light rays illuminating it and the normal is larger, and the angle of light deflection is larger, so that more light rays can illuminate the edge area, increase the light intensity incident on the edge, and improve the problem of the center being too bright and the edge being too dark. Furthermore, the polarizing lens described in this application is provided with multiple optical lenses, and the illumination areas of a single spherical crown optical structure will overlap with each other. The local light intensity reduction caused by the concave point deflecting light in a single optical structure will be compensated by the light projected onto the area by other optical structures, thereby achieving a uniform distribution of illuminance in the room and improving the overall lighting experience. The polarizing lens can deflect light to make the illumination range of the point light source larger. When the polarizing lens is applied to the lamp, the lens and light source board of the same size as the prior art can achieve a wider illumination angle and a larger light spot coverage. That is, when it is assembled and used with a larger lampshade, the light can completely illuminate the edge area of ​​the lampshade, so that the light spot matches the size of the larger lampshade, while ensuring the brightness of the light spot edge. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the polarizing lens described in Example 1; Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 This is a cross-sectional view of the polarizing lens described in Example 1; Figure 4 for Figure 3 Enlarged view at point B in the middle; Figure 5 This is a light distribution diagram of the spherical crown-shaped optical structure described in Example 1; Figure 6 This is an exploded view of the lighting device described in Example 2; Figure 7 This is a cross-sectional view of the lighting device described in Example 2; Figure 8 for Figure 7 Enlarged view of point C. Detailed Implementation

[0015] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0016] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0019] Example 1 Reference Figures 1 to 5 The present application proposes an embodiment 1, wherein the polarizing lens of this embodiment includes an optical lens 10, and the optical lens 10 is provided with a plurality of annular arrays 20, which are arranged in a concentric ring on the optical lens 10; each annular array 20 is formed by a plurality of spherical optical structures 21 arranged along the same circumference; The spherical crown-shaped optical structure 21 has a spherical crown surface 213 as its light-emitting surface. A concave point 30 is provided on the spherical crown surface 213, and the concave point 30 is offset by a predetermined distance relative to the center point 214 of the spherical crown surface 213 along the radial direction of the concentric rings, away from the center of the concentric rings. The light-incident side of the spherical optical structure 21 is disposed opposite to the spherical surface 213, and the light-incident side of the spherical optical structure 21 is provided with a light source receiving portion 211.

[0020] A concave point 30 is provided on the spherical surface 213. Light rays incident on the concave point 30 are refracted and deflected away from the optical axis. If the concave point 30 is located in the central area of ​​the spherical surface 213, the concave point 30 will cause the light rays incident on the central area of ​​the spherical surface 213 to be evenly dispersed in all directions. Although this can weaken the central bright spot to some extent, it will cause the light to be evenly scattered in all directions, making it impossible to accurately project the light onto the edge areas that need supplemental lighting, and the overall lighting efficiency will be greatly reduced.

[0021] In this application, the concave point 30 is offset by a predetermined distance from the center point 214 of the spherical cap surface 213 along the radial direction of the concentric ring away from the center of the concentric ring. By utilizing the curved surface structure of the side of the concave point 30 near the outer side of the concentric ring, the angle formed by the light rays illuminating it and the normal is larger, and the angle of light deflection is larger, so that more light rays can illuminate the edge area, increase the light intensity incident on the edge, and improve the problem of the center being too bright and the edge being too dark. Furthermore, the polarizing lens described in this application is provided with multiple optical lenses 10, and the illumination areas of a single spherical crown optical structure 21 will overlap with each other. The local light intensity reduction caused by the deflection of light by the concave point 30 of a single optical structure will be compensated by the light projected onto the area by all other optical structures, thereby achieving a uniform distribution of illuminance in the room and improving the overall lighting experience.

[0022] Specifically, in this embodiment, the spherical crown optical structure 21 is a hemispherical optical structure.

[0023] Preferably, the light-incident side of the spherical crown-shaped optical structure 21 is further provided with a conical recess 212 that communicates with the light source receiving portion 211, and the tip of the conical recess 212 is eccentrically positioned and points towards the recess 30.

[0024] In this embodiment, when light is incident on the conical recess 212, since the light enters the lens from the air, the light illuminating the area near the cone tip of the conical recess 212 is deflected in a direction closer to the normal; and since the cone tip of the conical recess 212 is precisely pointed to the eccentric recess 30 of the light-emitting surface, the light illuminating the area near the cone tip is deflected away from the recess 30.

[0025] After being pre-deflected by the conical recess 212, these originally most concentrated rays of light will be deflected from the location of the recess 30 in a direction away from the recess 30 before shining onto the spherical surface 213. Then, under the action of the spherical surface 213, they will continue to be deflected outward, ensuring that the light can be effectively refracted to the edge area.

[0026] If the tip of the conical recess 212 is directed toward the center of the spherical surface 213, the deflection effect of the conical recess 212 on light does not deflect outward from the location of the recess 30, resulting in the light not being effectively deflected to the edge area. In this case, the preset distance of the recess 30 offset needs to be set larger in order for the light to be effectively deflected to the edge area.

[0027] If the preset offset distance of the concave point 30 is too large, its effective working area will extend to the outer region of the spherical surface 213. The light rays incident on this region already have a large angle, and even without passing through the concave point 30, they can be deflected to the edge region of the illuminated surface through the refraction of the spherical surface without the concave point 30. At this time, the concave point 30 will perform secondary excessive deflection on this part of the light rays, causing its deflection angle to exceed the effective illumination range, and finally projecting it to the area outside the illuminated surface, resulting in a direct waste of light energy. In order to capture enough light for edge lighting even with a large offset distance, it is usually necessary to simultaneously increase the area of ​​the concave point 30. At the same time, a large offset distance for the concave point 30 will also cause a ring-shaped alternating bright and dark defect with a central dark area, a central bright ring, and an edge dark area, affecting the visual effect. Furthermore, a large offset and a large size of the concave point 30 significantly increases the processing precision requirements of the injection mold, prolonging the mold processing cycle and increasing costs.

[0028] In this embodiment, along the direction from the outside to the inside of the concentric rings, the radial distance between two radially adjacent ring arrays 20 increases sequentially.

[0029] This invention employs a non-equidistant arrangement design where the spacing between radially adjacent ring arrays 20 gradually increases from the outer to the inner side of the ring, which can match the light intensity distribution characteristics of the LED light source. Since the light intensity in the central region of the LED is much higher than that in the edge region, by increasing the spacing of the ring arrays 20 on the inner side of the ring, the number of optical structures per unit area in the central region can be reduced, avoiding excessive superposition of light intensity in the central region; at the same time, reducing the spacing of the ring arrays 20 on the outer side of the ring increases the optical structure density in the edge region, further improving the luminous flux in the edge region and enhancing the uniformity of illumination.

[0030] Specifically, multiple ring arrays 20 are arranged in concentric rings with the geometric center of the optical lens 10 as the center.

[0031] The present invention adopts a concentric ring arrangement with the geometric center of the optical lens 10 as the center, ensuring that the light passes through the optical lens 10 to form a uniform circular light spot. The light spot matches the outline of the lighting device and is suitable for circular light-emitting lighting devices such as circular lampshades, downlights, and spotlights.

[0032] In this embodiment, the optical lens 10 and the spherical optical structure 21 are integrally formed. The optical lens 10 and the spherical optical structure 21 are integrally injection molded to ensure the positional accuracy of the spherical optical structure 21 and the eccentric concave point 30.

[0033] Example 2 Reference Figures 6 to 8 As shown, Embodiment 2 also proposes a lighting device, including a housing 100, a light-transmitting portion on the housing 100, a light-emitting element 110 and a polarizing lens 120 as described in Embodiment 1 inside the housing 100, the polarizing lens 120 being distributed on the side of the light-emitting element 110 near the light-transmitting portion, the light-emitting element 110 being provided with a plurality of point light sources 111, and each point light source 111 being distributed within the light source receiving portion 211.

[0034] In this embodiment, the shape of the outer casing 100 is not specifically limited; it can be square, circular, or other shapes, but is preferably circular. The lighting device can be a ceiling light, spotlight, or downlight.

[0035] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A polarizing lens, characterized in that, Includes an optical lens (10), on which multiple annular arrays (20) are provided, the multiple annular arrays (20) being arranged in a concentric ring on the optical lens (10); each annular array (20) is formed by multiple spherical optical structures (21) arranged along the same circumference; The spherical crown-shaped optical structure (21) has a spherical crown surface (213) as its light-emitting surface. The spherical crown surface (213) is provided with a concave point (30), and the concave point (30) is offset by a predetermined distance from the center point (214) of the spherical crown surface (213) along the radial direction of the concentric rings away from the center of the concentric rings. The light-incident side of the spherical optical structure (21) is disposed opposite to the spherical surface (213), and the light-incident side of the spherical optical structure (21) is provided with a light source receiving part (211).

2. The polarizing lens according to claim 1, characterized in that, The spherical crown-shaped optical structure (21) is a hemispherical optical structure.

3. The polarizing lens according to claim 1, characterized in that, The light-incident side of the spherical crown-shaped optical structure (21) is also provided with a conical recess (212) that communicates with the light source receiving part (211), and the tip of the conical recess (212) points to the recess (30).

4. The polarizing lens according to any one of claims 1-3, characterized in that, Along the concentric rings from the outside to the inside, the radial distance between two radially adjacent ring arrays (20) increases sequentially.

5. The polarizing lens according to any one of claims 1-3, characterized in that, Multiple ring arrays (20) are arranged in concentric rings with the geometric center of the optical lens (10) as the center.

6. The polarizing lens according to claim 1, characterized in that, The optical lens (10) is integrally formed with the spherical optical structure (21).

7. A lighting device, characterized in that, The device includes a housing (100), which has a light-transmitting portion. Inside the housing (100) is a light-emitting element (110) and a polarizing lens as described in any one of claims 1-6. The polarizing lens is distributed on the side of the light-emitting element (110) near the light-transmitting portion. The light-emitting element (110) has a plurality of point light sources (111), and each point light source (111) is distributed inside the light source receiving portion (211).

8. The lighting device according to claim 7, characterized in that, The outer shell (100) is square or round.

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