Spotlight

Abstract

The utility model relates to the technical field of lighting, provide a spotlight, include: light -transmitting panel, lens and light source, the light source is located the incident end of lens, the light -transmitting panel is located the outgoing end of lens, be equipped with the light outlet on the light -transmitting panel, the central axis of light outlet and the central axis of lens coincide, and the diameter of light outlet is less than the diameter of the outgoing end of lens. The utility model discloses a spotlight, the diameter of light outlet on the light -transmitting panel is less than the diameter of the outgoing end of lens, owing to the smaller light outlet, the stray light of lens outgoing is blocked by the cover plate, only the light that passes through the convergence of lens is exported from the light outlet, thereby avoided the glare.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, and in particular to a spotlight. Background Technology

[0002] Existing spotlights include a light source and a total internal reflection (TIR) ​​lens. The light source and the TIR lens are located inside the spotlight housing. The light source is located at the incident end of the TIR lens. The housing has an opening in the area corresponding to the TIR output end, which is large enough to cover the incident end area of ​​the TIR lens.

[0003] The light emitted by the light source is focused by the TIR lens and then emitted from the opening. Because the opening area on the cover plate is large, stray light emitted from the emitting end of the TIR lens (such as large-angle emitted light, i.e. emitted light with an emission angle greater than 45 degrees) also comes out from the opening, thus causing glare problems. Utility Model Content

[0004] This invention provides a spotlight to solve the problem of glare generated by spotlights in the prior art.

[0005] This utility model provides a spotlight, including: a light-transmitting panel, a lens, and a light source. The light source is located at the incident end of the lens, and the light-transmitting panel is located at the exiting end of the lens. The light-transmitting panel is provided with a light-emitting hole, the central axis of the light-emitting hole coincides with the central axis of the lens, and the diameter of the light-emitting hole is smaller than the diameter of the exiting end of the lens.

[0006] According to the present invention, the diameter of the light-emitting aperture is 50% to 70% of the diameter of the emitting end of the lens.

[0007] According to the present invention, a spotlight is provided, wherein the lens is a total internal reflection lens, the incident end of the total internal reflection lens is provided with an incident structure cavity, the incident structure cavity has a top incident curved surface, and the top incident curved surface protrudes from the incident end of the total internal reflection lens.

[0008] According to the present invention, a spotlight has an incident structure cavity having a side incident surface, which intersects with a reference plane passing through the central axis of the incident structure cavity to form a side curve.

[0009] According to the present invention, a spotlight is provided in which the emission end of the total internal reflection lens is provided with an emission structure cavity, and a reflective layer is provided on the side wall of the emission structure cavity, with the reflective surface of the reflective layer facing the inside of the emission structure cavity.

[0010] According to the present invention, the central axes of the incident cavity and the exit cavity are collinear with the central axis of the total internal reflection lens.

[0011] According to the present invention, a spotlight is provided in which a predetermined gap is provided between the light-transmitting panel and the emitting end of the lens.

[0012] According to the present invention, a spotlight further includes: a pad, the pad being detachably installed between the lens and the light-transmitting panel, the pad having a light-transmitting hole so that a gap of the predetermined distance is formed between the light-transmitting panel and the emitting end of the lens, and the projection of the light-transmitting hole onto the plane of the emitting end surface of the lens completely covers the emitting end of the lens.

[0013] According to the present invention, a spotlight is provided, wherein the light-transmitting panel includes: a transparent panel and a screen printing layer formed on the transparent panel, and the screen printing layer is provided with the light-emitting hole.

[0014] According to the present invention, a spotlight is provided in which the light-transmitting panel is made of a black non-transparent panel and the light-emitting hole is provided on the non-transparent panel.

[0015] The spotlight provided by this utility model has a light-emitting hole on its light-transmitting panel with a diameter smaller than that of the lens's emission end. Because the light-emitting hole is smaller, stray light emitted from the lens is blocked by the cover plate, and only the light rays converged by the lens are emitted from the light-emitting hole, thereby avoiding glare. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the spotlight structure provided by this utility model.

[0018] Figure 2 This is a schematic diagram of the total internal reflection lens structure in the spotlight provided by this utility model.

[0019] Figure 3 This is a schematic diagram of the optical path of the spotlight provided by this utility model.

[0020] Figure 4 This is one of the schematic diagrams of the light-transmitting panel in the spotlight provided by this utility model.

[0021] Figure 5 This is the second schematic diagram of the light-transmitting panel in the spotlight provided by this utility model.

[0022] Figure 6This is a schematic diagram of the lighting effect of a spotlight vertically illuminating a wall surface, provided by this utility model.

[0023] Figure 7 This is a schematic diagram of the lighting effect of the wall washing method provided by the present invention.

[0024] Figure 8 This utility model provides a combination of spotlights.

[0025] Figure 9 yes Figure 8 A cross-sectional view along the AA direction.

[0026] The attached figures are labeled as follows:

[0027] 1: Housing; 2: Light source; 3: Lens; 4: Transparent panel; 5: Light exit hole; 6: Drive circuit board; 7: Entrance structure cavity; 8: Pad; 9: Light passage hole; 10: Exit structure cavity; 11: Reflective layer; 41: Silk screen layer. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In related technologies, to address the glare problem, a reflector is added to the exit end of the TIR lens. This reflector reflects stray light multiple times and absorbs it, thus reducing its brightness and glare. However, adding a reflector increases the complexity of the spotlight's internal structure and its cost. While this solution reduces glare to some extent, its anti-glare effect is not significant, and the spotlight's complex structure and high cost further exacerbate the issue.

[0030] To address the aforementioned problems in existing related technologies, the spotlight of this utility model embodiment, such as... Figure 1 As shown, the system includes: a light-transmitting panel 4, a lens 3, and a light source 2. The light source 2 is located at the incident end of the lens 3, and the light-transmitting panel 4 is located at the exiting end of the lens 3. The light-transmitting panel 4 has a light-emitting hole 5, the central axis of which coincides with the central axis of the lens 3, and the diameter of the light-emitting hole 5 is smaller than the diameter of the exiting end of the lens 3. That is, the light-emitting hole 5 of the light-transmitting panel 4 is used for light emission, and other areas of the light-transmitting panel 4 except for the light-emitting hole 5 are opaque.

[0031] Of course, the spotlight in this embodiment also includes a housing 1 and a driving circuit board 6. The light-transmitting panel 4, lens 3, light source 2, and driving circuit board 6 are all located inside the housing 1. The driving circuit board 6 is used to drive the power supply 2 to emit light. The light source 2 can be an LED light source, which is fixed inside the housing 1 by the driving circuit board 6.

[0032] In this embodiment, the diameter of the light-emitting hole 5 on the light-transmitting panel 4 is smaller than the diameter of the emitting end of the lens 3. Because the light-emitting hole 5 is smaller, the stray light emitted from the lens 3 at a large angle is blocked by the opaque area of ​​the light-transmitting panel 4. Only the light rays converged by the lens 3 are emitted from the light-emitting hole 5 of the light-transmitting panel 4, thereby avoiding glare and having a good anti-glare effect. Moreover, the internal structure of the spotlight is simple and the cost is low.

[0033] In some embodiments, in order to further prevent stray light from escaping from the light outlet 5, the diameter of the light outlet 5 is set to 50% to 70% of the diameter of the emitting end of the lens 3, thereby minimizing stray light from escaping from the light outlet 5 and causing glare, while ensuring the amount of normal light emitted and the illumination brightness of the spotlight.

[0034] Because the light-emitting aperture 5 is reduced in size, although glare is avoided, some of the light normally reflected inside the lens 3 is blocked by the opaque area of ​​the light-transmitting panel 4, resulting in lower spotlight brightness. Therefore, as... Figure 2 As shown, in some embodiments, lens 3 is a total internal reflection lens, and the incident end of the total internal reflection lens is provided with an incident structure cavity 7. The incident structure cavity 7 has a top incident curved surface, and the top incident curved surface protrudes from the incident end of the total internal reflection lens. The total internal reflection lens allows the incident light to propagate inside the total internal reflection lens and finally exit from the exit end of the total internal reflection lens. Combined with the light-converging effect of the top incident curved surface structure of the incident structure cavity 7, large-angle outgoing light is avoided from exiting the exit end of the total internal reflection lens, thereby better avoiding glare.

[0035] Furthermore, the top incident surface intersects with the reference plane passing through the central axis of the incident structure cavity 7 to form a top curve S1, which satisfies the following first curve equation: y = a 1 x 3 + b 1 x 2 + c 1 x + d 1. The coordinate system of the first curve equation is constructed with the center point of the top incident surface as the origin o1, the x-axis as the direction perpendicular to the center of the top incident surface to the exit end in the reference plane, and the y-axis perpendicular to the x-axis in the reference plane, i.e., the coordinate system xo1y. a 1.b 1. c 1 and d 1 represents the coefficients, a The value of 1 ranges from 0.0014 to 0.0020. b The value of 1 ranges from 0.2102 to 0.2108. c The value of 1 ranges from 5.1732 to 5.1738. d The value of 1 ranges from 24.50 to 24.64.

[0036] In this embodiment, an illumination experiment demonstrates that when the diameter of the light-emitting aperture 5 is set to 50% to 70% of the diameter of the exit end of the total internal reflection lens, and the top curve S1 satisfies the first curve equation, light rays incident from the top incident surface are reflected inside the total internal reflection lens and exit at the exit end. Among these rays, 78% to 82% can exit from the light-emitting aperture 5, thereby improving the brightness of the spotlight illumination.

[0037] It should be noted that there are several reference planes passing through the central axis of the incident structure cavity 7. The first curve equation corresponding to the top curve S1 formed by the intersection of any reference plane and the top incident surface is the curve equation under the coordinate system xo1y of any reference plane.

[0038] Preferably, it has been demonstrated through light illumination experiments that, a 1 = 0.0017 b 1 = 0.2105, c 1 = 5.1735 d When 1=24.57, the light incident from the top incident surface has the highest brightness through the light exit hole 5.

[0039] In some embodiments, such as Figure 2 As shown, the incident cavity 7 has a side incident surface, which intersects with a reference plane passing through the central axis of the incident cavity 7 to form a side curve S2. Experiments have shown that when the side incident surface intersects with the reference plane passing through the central axis of the incident cavity 7 to form a side curve, light rays passing through the side incident surface are more easily focused and emitted from the light exit hole 5 after refraction within the total internal reflection lens, thus improving the brightness of the spotlight.

[0040] Furthermore, the side curve S2 satisfies the following second curve equation: y = a 2 x 3 + b 2 x 2 + c 2 x + d2. The coordinate system of the second curve equation is constructed with the intersection of the reference plane passing through the central axis of the total internal reflection lens and the edge of the incident end of the total internal reflection lens as the origin, the intersection of the reference plane passing through the central axis of the total internal reflection lens and the plane containing the incident end of the total internal reflection lens as the x-axis, and a y-axis perpendicular to the x-axis. a 2. b 2. c 2 and d 2 represents the coefficients, a The value of 2 ranges from 0.0034 to 0.0040. b The value of 2 ranges from 0.3102 to 0.3108. c The value of 2 ranges from 5.1432 to 5.1438. d The value of 2 ranges from 12.50 to 12.64.

[0041] In this embodiment, an illumination experiment demonstrates that when the diameter of the light-emitting aperture 5 is set to 50% to 70% of the diameter of the exit end of the total internal reflection lens, the top curve S1 satisfies the first curve equation, and the side curve S2 satisfies the second curve equation, light rays incident from the side incident surface are reflected inside the total internal reflection lens 3 and exit at the exit end. Among these rays, 80% to 85% of the light rays can exit from the light-emitting aperture 5, thereby improving the brightness of the spotlight illumination.

[0042] It should be noted that there are several reference planes passing through the central axis of the incident structure cavity 7. The second curve equation corresponding to the side curve S2 formed by the intersection of any reference plane and the side incident surface is the curve equation under the coordinate system xo2y of any reference plane.

[0043] Preferably, it has been demonstrated through light illumination experiments that, a 2 = 0.0037, b 2 = 0.3105, c 2 = 5.1435, d When 2=12.57, the light incident from the side incident curved surface has the highest brightness through the light exit hole 5.

[0044] In some embodiments, such as Figure 3As shown, the exit end of the total internal reflection lens is provided with an exit structure cavity 10, and a reflective layer 11 is provided on the side wall of the exit structure cavity 10, with the reflective surface of the reflective layer 11 facing inward towards the exit structure cavity 10. It should be noted that the exit structure cavity 10 is a cavity created by injection molding during the manufacturing process of the total internal reflection lens. In this embodiment, the reflective layer 11 is formed on the side wall of the exit structure cavity 10. The reflective layer 11 can be reflective paper, which can be attached to the side wall of the exit structure cavity 10. This reflective layer 11 is used to reflect light rays incident from the top incident curved surface of the incident structure cavity 7 of the total internal reflection lens after they strike the reflective layer 11, allowing the light rays to exit from the light exit hole 5, further improving the brightness of the light exit hole 5.

[0045] like Figure 3 As shown, in order to better allow the light reflected by the reflective layer 11 to exit through the light exit hole 5, the angles of the sidewalls and bottom of the exit structure cavity 10 are adjusted. α The angle is 93°-95°. Furthermore, the angles of the sidewalls and bottom of the exit structure cavity 10 are... α If the angle is too large, it will block the refracted light rays that pass through the side incident curved surface of the incident structure cavity 7 and are then reflected in the total internal reflection lens. Therefore, 93°-95° ​​is a suitable angle.

[0046] The reflective layer 11 has a reflectivity of 80% to 99%. The higher the reflectivity, the more light is emitted from the light outlet 5, and the brighter the spotlight is.

[0047] In some embodiments, the central axes of the incident cavity 7 and the exit cavity 10 are both collinear with the central axis of the total internal reflection lens, and the central axis of the total internal reflection lens is also collinear with the central axis of the light outlet 5. This achieves maximum light output efficiency and improves the brightness of the spotlight.

[0048] In some embodiments, such as Figure 1 As shown, a predetermined gap is provided between the light-transmitting panel 4 and the exiting end of the lens 3. Because the light-emitting aperture 5 is reduced in size, to ensure that a greater amount of light can exit from the light-emitting aperture 5, it is necessary to adjust the distance between the light-transmitting panel 4 and the exiting end of the lens 3 to maintain a certain distance. For example, the distance h1 between the light-transmitting panel 4 and the exiting end of the lens 3 is 40% to 60% of the height h2 of the lens 3.

[0049] For example, when the diameter of the light exit aperture 5 is set to 50% to 70% of the diameter of the exit end of the total internal reflection lens, the top curve S1 satisfies the first curve equation: y = a 1 x 3 + b 1 x 2 + c 1 x+ d 1, a The value of 1 ranges from 0.0014 to 0.0020. b The value of 1 ranges from 0.2102 to 0.2108. c The value of 1 ranges from 5.1732 to 5.1738. d The value of 1 ranges from 24.50 to 24.64, and the lateral curve S2 satisfies the equation of the second curve: y = a 2 x 3 + b 2 x 2 + c 2 x + d 2, a 2. b 2. c 2 and d 2 represents the coefficients, a The value of 2 ranges from 0.0034 to 0.0040. b The value of 2 ranges from 0.3102 to 0.3108. c The value of 2 ranges from 5.1432 to 5.1438. d When the value of 2 is in the range of 12.50~12.64, and h1 is 40%~60% of h2, the spotlight can achieve a better light output efficiency, that is, a larger light output, which ensures the lighting brightness of the spotlight.

[0050] In some embodiments, the spotlight further includes a pad 8, which is detachably mounted between the lens 3 and the light-transmitting panel 4. The pad 8 can be mounted inside the housing 1 using a detachable mounting structure such as screws or clips, and is located between the lens 3 and the light-transmitting panel 4. The pad 8 has a light-transmitting hole 9 to create a gap of the predetermined distance between the light-transmitting panel and the emitting end of the lens. The projection of the light-transmitting hole 9 onto the plane of the emitting end surface of the lens 3 completely covers the emitting end of the lens 3. For example, the central axis of the light-transmitting hole 9 coincides with the central axis of the lens 3, and the diameter of the light-transmitting hole 9 is greater than or equal to the diameter of the emitting end of the lens 3.

[0051] In this embodiment, the pad 8 can have different height specifications. The appropriate height of the pad 8 can be selected according to the needs of the installation environment. The amount of light emitted from the light-emitting hole 5 can be adjusted by changing the distance h1. Alternatively, the appropriate height of the pad 8 can be selected according to the height of different lenses 3 to ensure that the spotlight has a high light output.

[0052] In some embodiments, such as Figure 4As shown in the dashed box, the light-transmitting panel 4 includes a transparent panel and a silkscreen layer 41 formed on the transparent panel. The silkscreen layer 41 has a light-emitting hole 5. The silkscreen layer 41 is black, which not only blocks stray light from escaping but also absorbs light, preventing stray light from being reflected and then re-emitted, thus further avoiding glare. Moreover, the light-emitting hole 5 is an area on the transparent panel that is not silkscreened, not an opening, so the silkscreened transparent panel provides a certain degree of dust and water sealing for the interior of the housing 1. For example, the light-transmitting panel 4 can be made of PMMA material, and except for the area of ​​the light-emitting hole 5, the remaining areas are silkscreened in black to absorb stray light emitted from the lens 3. Preferably, the silkscreen layer 41 is located on the side of the transparent panel facing the lens 3, which can directly absorb stray light and prevent stray light from being reflected after hitting the side of the transparent panel facing the lens 3 (the reflected light may become stray light again).

[0053] In some embodiments, such as Figure 5 As shown in the dashed box, the light-transmitting panel 4 is made of a black, opaque panel with a light-emitting hole 5. The black material has a light-absorbing effect, preventing stray light from being reflected and then re-emitted, thus further avoiding glare.

[0054] like Figure 6 and 7 As shown, the lighting effect diagram of the spotlight in any of the above embodiments is from... Figure 6 and Figure 7 It can be seen that there is no glare problem regardless of the illumination angle, and the illumination effect is good.

[0055] like Figure 8 and Figure 9 As shown, in some embodiments, the spotlight can be a spotlight formed by a single light source 2 and a single total internal reflection lens 3, or it can be a spotlight group formed by multiple light sources 2 and total internal reflection lenses 3. Specifically, all the light sources 2 and total internal reflection lenses 3 are installed inside the housing 1, and a light-emitting hole 5 is set on a cover plate 4 corresponding to the center position of the total internal reflection lens 3. The spotlight group can be a linear spotlight group or a matrix spotlight group, etc., and different combinations can be made according to the actual illumination conditions.

[0056] It should be noted that in the description of this utility model, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The terms "upper," "lower," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] In this invention, the terms "first," "second," etc., are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this invention can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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. Such 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 utility model.

Claims

1. A spotlight, characterized in that, include: The light-transmitting panel, lens, and light source are provided. The light source is located at the incident end of the lens, and the light-transmitting panel is located at the exit end of the lens. The light-transmitting panel is provided with a light-emitting hole, the central axis of which coincides with the central axis of the lens, and the diameter of the light-emitting hole is smaller than the diameter of the exit end of the lens.

2. The spotlight according to claim 1, characterized in that, The diameter of the light-emitting aperture is 50% to 70% of the diameter of the exit end of the lens.

3. The spotlight according to claim 1, characterized in that, The lens is a total internal reflection lens, and the incident end of the total internal reflection lens is provided with an incident structure cavity. The incident structure cavity has a top incident curved surface, and the top incident curved surface protrudes from the incident end of the total internal reflection lens.

4. The spotlight according to claim 3, characterized in that, The incident structure cavity has a side incident surface, which intersects with a reference plane passing through the central axis of the incident structure cavity to form a side curve.

5. The spotlight according to claim 3, characterized in that, The total internal reflection lens has an exit structure cavity at its exit end, and a reflective layer is provided on the side wall of the exit structure cavity, with the reflective surface of the reflective layer facing the inside of the exit structure cavity.

6. The spotlight according to claim 5, characterized in that, The central axes of the incident cavity and the exit cavity are both collinear with the central axis of the total internal reflection lens.

7. The spotlight according to claim 1, characterized in that, A predetermined gap is provided between the light-transmitting panel and the exit end of the lens.

8. The spotlight according to claim 7, characterized in that, Also includes: A pad is detachably installed between the lens and the light-transmitting panel. The pad has a light-transmitting hole so that a gap of the predetermined distance is formed between the light-transmitting panel and the exit end of the lens. The projection of the light-transmitting hole onto the plane of the exit end surface of the lens completely covers the exit end of the lens.

9. The spotlight according to any one of claims 1 to 8, characterized in that, The light-transmitting panel includes: a transparent panel and a screen printing layer formed on the transparent panel, wherein the screen printing layer is provided with the light-emitting hole.

10. The spotlight according to any one of claims 1 to 8, characterized in that, The light-transmitting panel is made of a black, opaque panel, and the light-emitting hole is provided on the opaque panel.

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