Optical structure, optical piece, LED backlight lens and equipment
By designing rotationally symmetrical light-emitting and light-receiving surfaces, and utilizing the principles of refraction and reflection, composite light rays are superimposed on the illumination surface, solving the color separation problem of traditional LED backlight lenses and achieving uniform light distribution and improved transmittance.
Patent Information
- Application Number
- CN202520271069.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Traditional LED backlight lenses are prone to color separation problems when processing composite light, resulting in obvious color differences. Furthermore, traditional solutions such as adding frosting can reduce lens transmittance or cause processing instability.
The optical structure design includes a rotationally symmetrical light-emitting surface and a light-receiving surface. By combining multiple first and second surface units, the composite light rays are superimposed on the irradiation surface through refraction and reflection, thus eliminating color separation.
It effectively eliminates color separation problems and avoids the formation of bright spots, improving the uniformity of light and the transmittance of the lens.
Smart Images
Figure CN223728015U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of optical devices, and more particularly relates to an optical structure, an optical piece, an LED backlight lens and equipment. BACKGROUND
[0002] In a conventional LED backlight lens, a single-color chip is generally used to excite another single-color phosphor as a composite light source. For example, a blue chip is generally used to excite a yellow phosphor in a white LED light source. Therefore, the blue and yellow light emitted by the white LED light source will form blue and yellow light spot areas on the irradiation surface after being refracted by the inner and outer curved surfaces of the lens. The two areas cannot be completely superimposed, and thus a clear boundary between the blue and yellow light spots will be formed on the irradiation surface, i.e., there will be a color separation problem, and the color difference is obvious. CONTENT OF THE UTILITY MODEL
[0003] To solve or improve the technical problem that the curved surface of a conventional LED backlight lens will cause color separation after processing composite light, an optical structure, an optical piece, an LED backlight lens and equipment are provided in the embodiments of the present application.
[0004] In a first aspect, the embodiments of the present application provide an optical structure, comprising an optical entity; an out-light curved surface is arranged on the out-light side of the optical entity, and the out-light curved surface comprises a plurality of first curved surface units, each first curved surface unit being a protruding entity on the out-light side of the first curved surface unit; the first ends of each first curved surface unit are gathered at a first rotationally symmetric point to form an out-light surface with the first rotationally symmetric point as a symmetric center.
[0005] An optical cavity is arranged on the in-light side of the optical entity; the wall surface of the optical cavity is an in-light curved surface; the in-light curved surface comprises a plurality of second curved surface units, each second curved surface unit being a recessed space on the out-light side of the second curved surface unit, and the first ends of each second curved surface unit are gathered at a second rotationally symmetric point to form an in-light curved surface with the second rotationally symmetric point as a symmetric center.
[0006] It can be understood that the optical entity can be an entity object made of optical material. The light-out curved surface can be composed of a plurality of first curved surface units in a rotationally symmetrical manner; the light-in curved surface can be composed of a plurality of first curved surface units in a rotationally symmetrical manner. When the light rays of the composite light are emitted from the light cavity, the light rays are transmitted through the wall surface of the second curved surface unit or reflected along the wall surface of the second curved surface unit until the light rays are transmitted through the wall surface of the second curved surface unit; after the light rays pass through the second curved surface unit, the light rays are transmitted through the wall surface of the first curved surface unit or reflected along the wall surface of the first curved surface unit until the light rays are transmitted through the wall surface of the first curved surface unit; after the light rays pass through the first curved surface unit and the second curved surface unit, the light rays are emitted from the optical structure due to the difference in path length and refractive index, and the rotationally symmetrical effect of the first curved surface unit and the second curved surface unit, and the individual monochromatic light rays in the composite light will have overlapping parts, thereby eliminating color separation.
[0007] Further, the rotationally symmetrical rotation direction of the light-in curved surface is opposite to the rotationally symmetrical rotation direction of the light-out curved surface.
[0008] Further, each first curved surface unit comprises a convex curved surface; the convex curved surface comprises:
[0009] a first arc-shaped edge extending from a first starting point to the first rotationally symmetrical point;
[0010] a second arc-shaped edge extending from a second starting point to the first rotationally symmetrical point;
[0011] and a third arc-shaped edge protruding towards the light-out side of the first curved surface unit, both ends of the third arc-shaped edge being connected to the first starting point and the second starting point to form the convex curved surface.
[0012] Further, each second curved surface unit comprises a concave curved surface; the concave curved surface comprises:
[0013] a fourth arc-shaped edge extending from a third starting point to the second rotationally symmetrical point;
[0014] a fifth arc-shaped edge extending from a fourth starting point to the second rotationally symmetrical point;
[0015] and a sixth arc-shaped edge curved towards the light-in side of the light cavity, both ends of the sixth arc-shaped edge being connected to the third starting point and the fourth starting point to form the concave curved surface.
[0016] Further, the first rotationally symmetrical point and the second rotationally symmetrical point have a distance therebetween, and the first rotationally symmetrical point and the second rotationally symmetrical point are on the same perpendicular line.
[0017] Further, the curvature of the first arc-shaped side is greater than the curvature of the second arc-shaped side, the length of the first arc-shaped side is greater than the length of the second arc-shaped side, the rate of change of the curvature of the first arc-shaped side gradually increases from the first starting point to the first point of rotational symmetry, and the rate of change of the curvature of the first arc-shaped side is always greater than the rate of change of the curvature of the second arc-shaped side; the curvature of the fourth arc-shaped side is less than the curvature of the fifth arc-shaped side, the length of the fourth arc-shaped side is greater than the length of the fifth arc-shaped side, the rate of change of the curvature of the fourth arc-shaped side gradually increases from the fourth starting point to the second point of rotational symmetry, and the rate of change of the curvature of the fourth arc-shaped side is always greater than the rate of change of the curvature of the fifth arc-shaped side.
[0018] Further, the optical piece is integrally formed, and / or the material of the optical piece is polycarbonate or acrylic; and / or the center of the light cavity, the first point of rotational symmetry, and the second point of rotational symmetry are on the same straight line; and / or the light-incoming curved surface is integrally formed, and / or the light-emitting curved surface is integrally formed; and / or the angle a1 between the perpendicular line drawn from the first starting point of the first arc-shaped side and the tangent line of the first arc-shaped side at the first starting point is an acute angle; the angle a2 between the perpendicular line drawn from the first point of rotational symmetry of the first arc-shaped side and the tangent line of the first arc-shaped side at the first point of rotational symmetry is an obtuse angle; and / or the angle b1 between the horizontal line drawn from the second starting point of the fourth arc-shaped side and the tangent line of the fourth arc-shaped side at the second starting point is an acute angle; the angle b2 between the horizontal line drawn from the first point of rotational symmetry of the fourth arc-shaped side and the tangent line of the fourth arc-shaped side at the first point of rotational symmetry is an obtuse angle.
[0019] In a second aspect, the embodiments of the present application provide an optical piece comprising the optical structure.
[0020] In a third aspect, the embodiments of the present application provide an LED backlight lens comprising the optical piece.
[0021] In a fourth aspect, the embodiments of the present application provide a device comprising the optical piece or the LED backlight lens.
[0022] In the optical structure, the optical piece, the LED backlight lens, and the device of the embodiments of the present application, the light rays of the composite light are refracted and reflected by the light-emitting curved surface and the light-incoming curved surface which are rotationally symmetrical in the optical structure, and then the light rays of the composite light are divided into monochromatic light which is emitted from the first curved surface unit at the corresponding position, and finally reaches the irradiation surface. Due to the rotational symmetry of the first curved surface unit and the second curved surface unit, the distribution of the dispersed monochromatic light on the irradiation surface has a mutual superposition area. The monochromatic light in the composite light rays is superimposed on each other in the mutual superposition area on the irradiation surface, thereby eliminating color separation, and further solving or improving the technical problem that the lens curved surface in the traditional LED backlight lens will cause color separation when processing the composite light. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor.
[0024] Figure 1 A perspective view of a structure of the optical structure from one view angle.
[0025] Figure 2 A perspective view of a structure of the optical structure from another view angle.
[0026] Figure 3 A top view of a structure of the optical structure.
[0027] Figure 4 A bottom view of a structure of the optical structure.
[0028] Figure 5 A structure of Figure 4 A structure of a section A-A.
[0029] Figure 6 A structure of a first curved surface unit.
[0030] Figure 7 A structure of a second curved surface unit.
[0031] Figure 8 A principle diagram of the optical structure.
[0032] In the drawings, various reference signs represent:
[0033] 1-optical structure, 2-outgoing curved surface, 3-incoming curved surface, 4-first rotation symmetry point, 5-second rotation symmetry point, 6-optical entity, 21-first curved surface unit, 31-second curved surface unit, 211-first arc-shaped edge, 212-second arc-shaped edge, 213-third arc-shaped edge, 214-first starting point, 215-second starting point, 311-fourth arc-shaped edge, 312-fifth arc-shaped edge, 313-sixth arc-shaped edge, 314-third starting point, 315-fourth starting point.
[0034] 00 - light emitting point, 71 - incident light ray a, 72 - incident light ray b, 73 - incident light ray c, 74 - incident light ray d, 75 - incident light ray e, 76 - incident light ray f, 81 - second curved surface unit a, 82 - second curved surface unit b, 83 - second curved surface unit c, 9 - virtual plane, 101 - exit light ray a, 102 - exit light ray b, 103 - exit light ray c, 104 - exit light ray d, 105 - exit light ray e, 106 - exit light ray f, 111 - first curved surface unit a, 112 - first curved surface unit b, 113 - first curved surface unit c, 114 - first curved surface unit d. DETAILED DESCRIPTION
[0035] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, and not to limit the present application.
[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0038] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0039] At present, LED backlight lenses are widely used in the fields of television backlighting and advertising sign lighting. The function of such lenses is to expand the small light spot of the LED light source into a large light spot after the light emitted by the LED is refracted through the lens. In this way, the amount of LED lighting appliances can be saved at the application end, thereby achieving the purpose of saving costs.
[0040] The lens curve of the traditional LED backlight lens is a rotationally symmetrical structure. After the light emitted by the LED light source is refracted by the inner and outer curves of the lens, the emergent light also has rotational symmetry, so that the light source on the irradiation surface also has rotational symmetry.
[0041] In the traditional LED backlight lens, the LED light source generally uses a single-chip excitation of another single-color phosphor as a composite light source. For example, the white LED light source generally uses a blue chip excitation of yellow phosphor technology scheme, so that the blue and yellow light emitted by the white LED light source will form blue and yellow light spot areas on the irradiation surface after being refracted by the inner and outer curves of the lens. These two areas cannot be completely superimposed, and a clear boundary between the blue and yellow light spots will be formed on the irradiation surface, i.e., there will be a color separation problem, and the color difference is obvious.
[0042] Generally, the color difference problem is solved by adding a frosted surface to the inner and outer curves. However, this solution has two problems: one is that it reduces the transmittance of the lens, and the other is that the frosted surface has instability problems during injection molding. Further, due to the interface reflection of the outer curve, a small part of the light of the LED backlight lens will be reflected back to the PCB board through the outer curve, and then reflected back to the receiving surface through the PCB board. This will cause a bright spot to appear at the center of the front surface of the irradiation surface.
[0043] To solve or improve the technical problem of color separation caused by the lens curve of the traditional LED backlight lens in processing composite light, in a first aspect, an optical structure 1 is provided.
[0044] Referring to Figures 1-5 The optical structure 1 includes an optical entity 6. The light-emitting side of the optical entity is provided with a light-emitting curve 2, and the light-emitting curve includes a plurality of first curve units 21. Each first curve unit 21 is a protruding entity towards the light-emitting side of each first curve unit. The first end of each first curve unit converges at a first rotationally symmetrical point to form a light-emitting surface with the first rotationally symmetrical point as the center of symmetry.
[0045] The light-emitting side of the optical entity is provided with a light-emitting curve 2, and the light-emitting curve includes a plurality of first curve units 21. Each first curve unit 21 is a protruding entity towards the light-emitting side of each first curve unit. The first end of each first curve unit converges at a first rotationally symmetrical point to form a light-emitting surface with the first rotationally symmetrical point as the center of symmetry.
[0046] Referring to Figures 1-5As shown, in some embodiments, the light-out curved surface 2 can be a solid body arranged on the outer surface of the optical solid body 6; the light-out curved surface 2 is composed of a plurality of first curved surface units 21 centered on a first rotationally symmetric center; the light-in curved surface 3 of each first curved surface unit can be arranged as a recessed space towards the inner wall of the optical cavity of the optical solid body 6, and the light-in curved surface 3 is composed of a plurality of second curved surface units 31 centered on a second rotationally symmetric center.
[0047] When the light rays of the composite light pass through each first curved surface unit and second curved surface unit of the optical structure of the embodiments of the present application and are emitted, the emitted light rays will be directed towards different directions and then reach different light-out curved surface positions.
[0048] Since the first end of each second curved surface unit converges at a point, i.e., the second rotationally symmetric point, when the light rays are emitted from each second curved surface unit, the light rays will be deflected towards the direction of the second rotationally symmetric point after being refracted or reflected by the second curved surface unit.
[0049] After the light rays of the composite light are emitted from the second curved surface unit, the surface of the first curved surface unit is reached and then emitted after refraction or emitted after reflection and then refraction. Since the first end of each first curved surface unit converges at a point, i.e., the first rotationally symmetric point, when the light rays are emitted from each first curved surface unit, the light rays will be deflected towards the direction of the first rotationally symmetric point after being refracted by the surface of the first curved surface unit or after being reflected and then refracted.
[0050] Due to the effect of refraction, the light rays of the composite light will be emitted from each first curved surface unit as monochromatic light and finally reach the irradiation surface. Due to the rotationally symmetric of the first curved surface unit and the second curved surface unit, the distribution of the dispersed monochromatic light on the irradiation surface has a mutual superposition area. Each monochromatic light in the composite light will be superimposed on each other in the mutual superposition area of the irradiation surface, thereby eliminating color separation, and thus, to some extent, solving or improving the technical problem that the lens curved surface in the traditional LED backlight lens will cause color separation after processing the composite light. In addition, since the reflected light direction of the composite light after being reflected by the first curved surface unit and the second curved surface unit is divergent in different directions, the problem of local bright spot formation will not occur.
[0051] The specific principle is described in detail in the following embodiments. Figure 8As shown, the virtual plane 9 is a virtual plane for illustrating the principle and is not a limitation of the technical solution. Since the virtual plane 9 intersects the second curved surface units a 81, b 82 and c 83 of the light-incident curved surface, the light rays emitted by the light-emitting point 00 within the virtual plane 9 are incident on the intersection lines of the second curved surface units a 81, b 82 and c 83 and the virtual plane 9, respectively, and then are refracted by the second curved surface units a 81, b 82 and c 83 and emitted. Since the curvatures of the light-emitting points on the second curved surface units a 81, b 82 and c 83 are different, the directions of the emitted light rays are different after the light rays pass through the light-emitting points on the second curved surface units a 81, b 82 and c 83.
[0052] When the incident light ray a 71 emitted by the light-emitting point 00 is refracted by the second curved surface unit a 81 at a point on the intersection line of the second curved surface unit a 81 and the virtual plane 9, the refracted light ray is incident on a point on the first curved surface unit a 81 of the light-emitting curved surface. Since the curvatures of the light-emitting points on the first curved surface unit a 81 are different, the incident light ray a is refracted by the first curved surface unit a 81 and emitted after the incident light ray a reaches the light-emitting point. Similarly, the incident light rays b 72, c 73, d 74, e 75 and f 76 are refracted by the second curved surface units a 81, b 82 and c 83 and emitted.
[0053] Then, the light rays emitted by the light-emitting point within the virtual plane 9 are emitted from the emitting points on the intersection lines of the second curved surface units a 81, b 82 and c 83 and the virtual plane 9, and the directions of the emitted light rays are different, i.e., the directions of the emitted light rays are different. Subsequently, the light rays are incident on the light-emitting curved surface and are emitted from the target irradiation area in the forms of the emitted light rays a 101, b 102, c 103, d 104, e 105 and f 106 via the first curved surface units a 111, b 112, c 113 and d 114 of the first curved surface. According to the above light mixing principle, when the light source emits two different colors of light rays, the emitted light rays of the two colors are emitted from different directions, so that the emitted light rays of the two colors are superimposed on the irradiation area, thereby eliminating color separation. Since the directions of the reflected light rays are different, bright spots are not formed in the local area.
[0054] Further, the rotation direction of the rotation symmetry of the light-incident curved surface is opposite to the rotation direction of the rotation symmetry of the light-emitting curved surface.
[0055] It should be understood that the rotation direction of the rotation symmetry does not mean that the component can rotate, but a visual rotation generated, and the rotation direction is only used as a technique for facilitating the description of the technical features of the component.
[0056] Referring to Figure 3 It can be understood that the rotation direction of the rotation symmetry of the light-in surface is clockwise, and the rotation direction of the rotation symmetry of the light-out surface is counterclockwise. Alternatively, the rotation direction of the rotation symmetry of the light-in surface can also be counterclockwise, and the rotation direction of the rotation symmetry of the light-out surface can also be clockwise.
[0057] When the rotation direction of the rotation symmetry of the light-in surface is clockwise, and the rotation direction of the rotation symmetry of the light-out surface is counterclockwise, the light rays of the composite light will deflect from the clockwise direction to the direction of the second rotation symmetry point 5 of the light-in surface after being emitted from the light-in surface. When the light rays of the composite light reach the light-out surface and are emitted from the light-out surface, the light rays will deflect from the counterclockwise direction to the direction of the first rotation symmetry point 4 of the light-out surface, so that the light rays of the composite light can be emitted from the light-out surface in a spiral deflection manner, so that the light rays of the composite light have an overlapping area after reaching the irradiation surface, thereby avoiding the problem of obvious color separation caused by the existence of boundaries between individual monochromatic lights.
[0058] Referring to Figure 6 Alternatively, each first curved surface unit comprises a convex curved surface, the convex curved surface comprises a first arc-shaped edge 211, a second arc-shaped edge 212, and a third arc-shaped edge 213, the first arc-shaped edge extends from a first starting point 214 to the first rotation symmetry point 4, the second arc-shaped edge extends from a second starting point 215 to the first rotation symmetry point 4, and the third arc-shaped edge 213 protrudes towards the light-out side of the first curved surface unit, and the two ends of the third arc-shaped edge are connected with the first starting point 214 and the second starting point 215 respectively to form the convex curved surface. Figure 6 As shown in the figure, the convex curved surface has three arc-shaped edges, i.e., the first arc-shaped edge 211, the second arc-shaped edge 212, and the third arc-shaped edge 213. Alternatively, the light-out surface is integrally formed.
[0059] Alternatively, the first starting point 214 and the second starting point 215 are on the same horizontal line.
[0060] The first curved surface unit adopts the above structure, when the light emitted from the concave curved surface reaches the convex curved surface, the composite light rays can be emitted from each position of the convex curved surface under the guidance of the arcs of the first arc-shaped edge 211 and the second arc-shaped edge 212, and a light distribution centered on the first rotation symmetry point 4 is generated.
[0061] Referring to Figure 7As shown, in some embodiments, each second curved surface unit comprises a concave curved surface; the concave curved surface comprises: a fourth arc-shaped edge 311, a fifth arc-shaped edge 312, and a sixth arc-shaped edge 313; the fourth arc-shaped edge extends from a third starting point 314 to the second rotationally symmetric point 5; the fifth arc-shaped edge extends from a fourth starting point 315 to the second rotationally symmetric point 5; the sixth arc-shaped edge 313 is curved towards the light-incident side of the light cavity, and the two ends of the sixth arc-shaped edge are connected with the third starting point 314 and the fourth starting point 315 respectively to form the concave curved surface. Optionally, the light-incident curved surface is integrally formed, and optionally, the third starting point and the fourth starting point are on the same horizontal line.
[0062] The second curved surface unit adopts the above structure, so that when the composite light enters the concave curved surface, the composite light can be guided by the arcs of the fifth arc-shaped edge and the sixth arc-shaped edge to propagate in the concave curved surface and have a tendency to deflect towards the second rotationally symmetric point 5.
[0063] Optionally, the first rotationally symmetric point and the second rotationally symmetric point have a distance therebetween, and the first rotationally symmetric point and the second rotationally symmetric point are on the same vertical line.
[0064] Referring to Figure 5 As shown, if the first rotationally symmetric point and the second rotationally symmetric point coincide, the composite light can directly exit from the coincidence point of the first rotationally symmetric point and the second rotationally symmetric point, so that when the exiting light reaches the illumination surface, a bright spot is easily generated. By arranging a distance between the first rotationally symmetric point and the second rotationally symmetric point, the composite light can be prevented from directly exiting from the first rotationally symmetric point and the second rotationally symmetric point, so that the generation of bright spots is reduced or avoided. By arranging the first rotationally symmetric point and the second rotationally symmetric point on the same vertical line, the light processed by the concave curved surface and the convex curved surface can be distributed more uniformly.
[0065] Referring to Figure 6 and 7 As shown, in some embodiments, the curvature of the first arc-shaped edge is greater than the curvature of the second arc-shaped edge, the length of the first arc-shaped edge is greater than the length of the second arc-shaped edge, the change rate of the curvature of the first arc-shaped edge gradually increases from the first starting point to the first rotationally symmetric point, and the change rate of the curvature of the first arc-shaped edge is always greater than the change rate of the curvature of the second arc-shaped edge; the curvature of the fourth arc-shaped edge is less than the curvature of the fifth arc-shaped edge, the length of the fourth arc-shaped edge is greater than the length of the fifth arc-shaped edge, the change rate of the curvature of the fourth arc-shaped edge gradually increases from the fourth starting point to the second rotationally symmetric point, and the change rate of the curvature of the fourth arc-shaped edge is always greater than the change rate of the curvature of the fifth arc-shaped edge.
[0066] Referring to Figure 6As shown, the length of the first arc-shaped side 211 is greater than that of the second arc-shaped side 212, the curvature of the first arc-shaped side 211 is greater than that of the second arc-shaped side 212, and the rate of change of the curvature of the first arc-shaped side is constantly greater than that of the second arc-shaped side, so that the first arc-shaped side 211 is inclined to the direction of the second arc-shaped side 212, and the bending degree of the upper part of the first arc-shaped side and the second arc-shaped side is greater than that of the lower part.
[0067] Referring to Figure 7 As shown, the length of the fourth arc-shaped side 311 is greater than that of the fifth arc-shaped side 312, the curvature of the fourth arc-shaped side 311 is greater than that of the fifth arc-shaped side 312, and the rate of change of the curvature of the fourth arc-shaped side is constantly greater than that of the fifth arc-shaped side, so that the fourth arc-shaped side 311 is inclined to the direction of the fifth arc-shaped side 312, and the bending degree of the upper part of the fourth arc-shaped side 311 and the fifth arc-shaped side 312 is greater than that of the lower part.
[0068] In the above manner, when the light is closer to the first and second rotationally symmetric points, the light tends to be concentrated towards the first and second rotationally symmetric points, and the overlapping area of the single-color light rays in the composite light after refraction by the concave and convex curved surfaces forms superimposed light on the irradiation surface, further avoiding color separation problems.
[0069] Optionally, the center of the light cavity, the first rotationally symmetric point, and the second rotationally symmetric point are on the same straight line.
[0070] Referring to Figure 6 As shown, the angle a1 between the perpendicular line drawn from the first arc-shaped side to the first starting point and the tangent line of the first arc-shaped side at the first starting point is an acute angle; optionally, the angle a1 can be 30-50°; the angle a2 between the perpendicular line drawn from the first arc-shaped side to the first rotationally symmetric point and the tangent line of the first arc-shaped side at the first rotationally symmetric point is an obtuse angle, and the angle a2 can be 120-145°.
[0071] Referring to Figure 7 As shown, the angle b1 between the horizontal line drawn from the fourth arc-shaped side to the second starting point and the tangent line of the fourth arc-shaped side at the second starting point is an acute angle; optionally, the angle b1 can be 20-50°, and specifically can be 20°, 25°, 30°, 35°, 40°, 45°, or 50°; the angle b2 between the horizontal line drawn from the fourth arc-shaped side to the first rotationally symmetric point and the tangent line of the fourth arc-shaped side at the first rotationally symmetric point is an obtuse angle; optionally, the angle b2 can be 120-145°, and specifically can be 120°, 125°, 130°, 135°, 140°, or 145°.
[0072] In the above manner, the number of first curved surface units in the concave curved surface and the number of second curved surface units in the convex curved surface are moderate, which facilitates processing and avoids color separation and bright spot problems after the first curved surface units and the second curved surface units process the light rays of the composite light.
[0073] In some embodiments, the optical piece is integrally formed, which is more convenient for processing. Optionally, the material of the optical piece is polycarbonate or acrylic. The processing method of the light ray structure can be that the optical entity is placed in a mold to obtain the light-emitting curved surface 2, or other processing methods are used. Optionally, the light cavity can be obtained by hollowing out the bottom center part of the optical entity. Specifically, the light-incident curved surface of the inner wall of the light cavity can be obtained by processing the optical entity using a mold with a light-incident curved surface 3.
[0074] In a second aspect, the embodiments of the present application provide an optical piece, comprising the optical structure described above.
[0075] The functions and effects of the technical features similar or related to the above technical solutions in the technical solution are similar to those of the above technical solutions. The inventive concept and beneficial effects of the technical solution are similar to those of the above technical solutions, and will not be repeated here.
[0076] In a third aspect, the embodiments of the present application provide an LED backlight lens, comprising the optical piece described above.
[0077] The functions and effects of the technical features similar or related to the above technical solutions in the technical solution are similar to those of the above technical solutions. The inventive concept and beneficial effects of the technical solution are similar to those of the above technical solutions, and will not be repeated here.
[0078] In a fourth aspect, the embodiments of the present application provide an apparatus, comprising the optical piece or the LED backlight lens described above.
[0079] The functions and effects of the technical features similar or related to the above technical solutions in the technical solution are similar to those of the above technical solutions. The inventive concept and beneficial effects of the technical solution are similar to those of the above technical solutions, and will not be repeated here.
[0080] The above is only the preferred embodiments of the present application, and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. An optical structure, characterized by, The optical entity comprises an optical out-coupling surface, the optical out-coupling surface comprises a plurality of first curved surface units, each first curved surface unit is a solid body protruding towards the out-coupling side of the first curved surface unit, and the first end of each first curved surface unit converges at a first rotationally symmetric point to form an out-coupling surface with the first rotationally symmetric point as the center of symmetry. The optical entity comprises an optical cavity, the wall surface of the optical cavity is an optical in-coupling surface, the optical in-coupling surface comprises a plurality of second curved surface units, each second curved surface unit is a space recessed towards the out-coupling side of the second curved surface unit, and the first end of each second curved surface unit converges at a second rotationally symmetric point to form an optical in-coupling surface with the second rotationally symmetric point as the center of symmetry.
2. The optical structure of claim 1, wherein, The rotationally symmetric rotation direction of the optical in-coupling surface is opposite to the rotationally symmetric rotation direction of the optical out-coupling surface.
3. The optical structure of claim 2, wherein, Each first curved surface unit comprises a convex curved surface, the convex curved surface comprises: a first arc-shaped side extending from a first starting point to the first rotationally symmetric point; a second arc-shaped side extending from a second starting point to the first rotationally symmetric point; and a third arc-shaped side protruding towards the out-coupling side of the first curved surface unit, and the two ends of the third arc-shaped side are connected to the first starting point and the second starting point respectively to form the convex curved surface.
4. The optical structure of claim 3, wherein, Each second curved surface unit comprises a concave curved surface, the concave curved surface comprises: a fourth arc-shaped side extending from a third starting point to the second rotationally symmetric point; a fifth arc-shaped side extending from a fourth starting point to the second rotationally symmetric point; and a sixth arc-shaped side curved towards the optical in-coupling side of the optical cavity, and the two ends of the sixth arc-shaped side are connected to the third starting point and the fourth starting point respectively to form the concave curved surface.
5. The optical structure according to any of claims 1-4, wherein The first rotationally symmetric point and the second rotationally symmetric point are on the same perpendicular line and have a distance therebetween.
6. The optical structure of claim 5, wherein, The curvature of the first arc-shaped side is greater than the curvature of the second arc-shaped side, the length of the first arc-shaped side is greater than the length of the second arc-shaped side, the change rate of the curvature of the first arc-shaped side gradually increases from the first starting point to the first rotationally symmetric point, and the change rate of the curvature of the first arc-shaped side is always greater than the change rate of the curvature of the second arc-shaped side; the curvature of the fourth arc-shaped side is less than the curvature of the fifth arc-shaped side, the length of the fourth arc-shaped side is greater than the length of the fifth arc-shaped side, the change rate of the curvature of the fourth arc-shaped side gradually increases from the fourth starting point to the second rotationally symmetric point, and the change rate of the curvature of the fourth arc-shaped side is always greater than the change rate of the curvature of the fifth arc-shaped side.
7. The optical structure of claim 6, wherein, The optical piece is integrally formed, and / or the material of the optical piece is polycarbonate or acrylic; and / or the center of the optical cavity, the first rotationally symmetric point and the second rotationally symmetric point are on the same straight line; and / or the light-incoming curved surface is integrally formed, and / or the light-outgoing curved surface is integrally formed; and / or the included angle a1 between the vertical line from the first starting point to the first arc-shaped edge and the tangent line of the first arc-shaped edge at the first starting point is an acute angle; the included angle a2 between the vertical line from the first rotationally symmetric point to the first arc-shaped edge and the tangent line of the first arc-shaped edge at the first rotationally symmetric point is an obtuse angle; and / or the included angle b1 between the horizontal line from the second starting point to the fourth arc-shaped edge and the tangent line of the fourth arc-shaped edge at the second starting point is an acute angle; the included angle b2 between the horizontal line from the first rotationally symmetric point to the fourth arc-shaped edge and the tangent line of the fourth arc-shaped edge at the first rotationally symmetric point is an obtuse angle, and / or the first starting point and the second starting point are on the same horizontal line, and the third starting point and the fourth starting point are on the same horizontal line.
8. An optical article characterized in that, The optical structure of any one of claims 1-7.
9. An LED backlit lens characterized by, The optical piece of claim 8.
10. An apparatus, comprising: The optical piece of claim 8 or the LED backlight lens of claim 9. The optical piece of claim 8 or the LED backlight lens of claim 9.