Lens device and illumination lamp having lens device

Abstract

To provide a lens device suppressing overlapping of optical shadows, and an illumination lamp having the lens device.SOLUTION: An illumination lamp 100 having a lens device 20 includes: a lamp holder; the lens device 20; and a translucent base 30. The lens device includes a substrate 24 and a circuit board 22. The substrate has a light irradiation surface 24A and a backlight surface. The light irradiation surface is provided with a plurality of lens parts 240. The circuit board 22 is located on one side of the light irradiation surface of the substrate 24; on one side surface of the circuit board, a plurality of light-emitting diodes 220 is provided. The light-emitting diodes have respective light-emitting surfaces. Each of the light-emitting surfaces corresponds to a recess hole of the lens part. The light flux distribution of the light-emitting diodes is controlled by an overlapping area formed by adjacent lens parts so as to suppress overlapping of optical shadows and to increase an illuminance value.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an illumination lamp, and more particularly to a lens device that suppresses overlapping of light shadows and an illumination lamp having the lens device. [Background technology]

[0002] It is known that light-emitting diode lighting devices are generally used in combination with a collimating lens (see, for example, Patent Document 1). In a light-emitting diode lighting device, the collimating lens focuses the scattered light beam emitted from the light-emitting diode in a specific direction, thereby improving the brightness of the light beam and the lighting effect. In addition, the collimating lens may control the angle and distribution of the light beam so that the light is distributed uniformly in a specific area.

[0003] A conventional illumination lamp generally comprises a plurality of pairs of collimating lenses and light-emitting diodes arranged in an array at intervals, where the light emitted from the light-emitting diodes is incident on the collimating lenses to form a reflected beam, and each pair of the collimating lenses and the light-emitting diodes forms a reflected beam.

[0004] However, when multiple reflected light beams illuminate an object, the distribution of each light beam and the angle of illumination on the object are different, so when the light beams illuminate the object, the light and shadows are clearly superimposed on the object's shadow, which causes discomfort to the user when viewing.

[0005] The above are the drawbacks of conventional illumination lamps, and the inventor has made an intensive effort to devise a lens device and an illumination lamp having a lens device so as to improve the above problems. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2023-012817 Summary of the Invention [Means for solving the problem]

[0007] In view of this, an object of the present invention is to provide a lens device that can effectively suppress overlap of light and shadow depending on the installation position of the lens.

[0008] Another object of the present invention is to provide an illumination lamp having a lens device that suppresses the problem of overlapping light and shadows due to the installation position of the lens, and increases the illuminance value of the light beam by providing multiple lenses and multiple light-emitting diodes.

[0009] To achieve the above object, the present invention provides a lens device including a substrate and a circuit board. The substrate has a light irradiation surface and a backlight surface, and a plurality of lens portions are provided on the light irradiation surface, and each of these lens portions has a recess and a base portion, and the base portion is connected to the light irradiation surface, and an outer contour is formed at the portion of each of the lens portions connected to the light irradiation surface, and an overlapping region is formed by the intersection of the outer contours of adjacent lens portions. A circuit board is located on one side of the light irradiation surface of the substrate, and a plurality of light emitting diodes are provided on one side of the circuit board, and each of these light emitting diodes has a light emitting surface, and each light emitting surface corresponds to the recess of the lens portion.

[0010] The present invention further provides an illumination lamp having a lens device, which includes a lamp holder, a lens device, and a translucent base. The lamp holder has an accommodation space. The lens device is disposed in the accommodation space of the lamp holder and includes a substrate and a circuit board. The substrate has a light-emitting surface and a backlight surface. The light-emitting surface of the substrate is provided with a plurality of lens portions, each having a recess and a base portion, with an outer contour formed where the base portion connects to the light-emitting surface, and an overlapping region formed by the intersection of the outer contours of adjacent lens portions. The circuit board is disposed on one side of the light-emitting surface of the substrate. A plurality of light-emitting diodes are disposed on one side of the circuit board, each having a light-emitting surface corresponding to the recess of the lens portion. The translucent base is coupled to the lamp holder and faces the backlight surface of the substrate of the lens device. Light generated by the light-emitting diodes enters the corresponding lens portion from the light-emitting surface and then transmits through the backlight and the translucent base. [Effects of the Invention]

[0011] The effect of the present invention is that the base portions of the lens portions overlap each other, and the light rays emitted from the light emitting diodes are refracted through the lens portions to form concentrated light beams, which, when illuminating an object, make the edges of the shadows on the object clearer and prevent overlapping of light and shadows, thereby improving the clarity and quality of the illumination of the object. In addition, since the base portions of the lens portions overlap each other, the direction and distribution of the light beams can be effectively controlled, and the overall illuminance value of the light beams can be increased. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view of an illumination lamp having a lens device according to a preferred embodiment of the present invention; [Figure 2] 1 is an exploded view of an illumination lamp having a lens device according to the above preferred embodiment of the present invention; [Figure 3]FIG. 1 is a plan view of a lens device according to the preferred embodiment of the present invention. [Figure 4] FIG. 2 is a schematic plan view of a substrate and a circuit board in the lens device according to the preferred embodiment of the present invention. [Figure 5] FIG. 5 is a partial enlarged view of part A in FIG. 4. [Figure 6] FIG. 6 is a cross-sectional view taken along the direction 6-6 of FIG. 3. [Figure 7] FIG. 7 is a partial enlarged view of part B in FIG. 6. [Figure 8] 8 is a cross-sectional view taken along the direction 8-8 of FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0013] In order to more clearly explain the present invention, preferred embodiments will be described in detail below with reference to the drawings. As shown in Figures 1 to 3, an illumination lamp 100 having a lens device according to a preferred embodiment of the present invention includes a lamp holder 10, a lens device 20, and a light-transmitting base 30.

[0014] The lamp holder 10 has an accommodating space S and includes a lamp holder body 12, a head base 14, and a base 16. The head base 14 is disposed on one side of the lamp holder body 12, and the base 16 is disposed on the other side of the lamp holder body 12, facing the head base 14. The head base 14 has a plug 142, which is connected to a power source to provide power transmission. In this embodiment, the lamp holder 10 is made of aluminum alloy, but may be made of other materials in other embodiments.

[0015] The lens device 20 is arranged in the accommodation space S of the lamp holder 10, and includes a circuit board 22 and a substrate 24. The circuit board 22 is first accommodated in the accommodation space S, and a plurality of light-emitting diodes 220 are arranged on one side of the circuit board 22. The substrate 24 has a light-emitting surface 24A and a backlight surface 24B, and a plurality of lens portions 240 are arranged on the light-emitting surface 24A of the substrate 24. Here, the substrate 24 is stacked on the circuit board 22, that is, the circuit board 22 is located on the light-emitting surface 24A side of the substrate 24, and the light-emitting diodes 220 are arranged corresponding to the positions of the lens portions 240, so that the light generated by the light-emitting diodes 220 passes through the lens portions 240 and enters the translucent base 30.

[0016] The light-transmitting base 30 faces the backlight surface 24B of the substrate 24 of the lens device 20, and includes a light-transmitting plate 32, a frame 34, and an upper cover plate 36. The light-transmitting plate 32 covers the backlight surface 24B of the substrate 24, the frame 34 has a groove 342 formed therein, the light-transmitting plate 32 is fixed in the groove 342 of the frame 34, and the upper cover plate 36 holds the frame 34, so that the frame 34 is fixed between the lamp holder 10 and the upper cover plate 36. A plurality of fasteners 362 pass through the upper cover plate 36, so that the frame 34 is directly fixed to the holder body 12 of the lamp holder 10. The light-transmitting plate 32 and the upper cover plate 36 are made of a light-transmitting material, so that light generated by the LEDs 220 can pass through the lens device 20 and the light-transmitting base 30 and be radiated to the outside.

[0017] 4 and 5, the lens device 20 will be described in further detail. In this embodiment, the lens portions 240 of the lens device 20 have a structure formed integrally with the substrate 24, and each lens portion 240 has a recessed hole 242 and a base portion 244. The base portion 244 is connected to the light irradiation surface 24A, and an outer contour P is formed at the portion where the base portion 244 of each lens portion 240 is connected to the light irradiation surface 24A, where the outer contours P of adjacent lens portions 240 intersect to form an overlapping region. Some of these lens portions 240 are arranged along a first axis L1, whereby an overlapping area formed by the intersection of the outer contours P of adjacent lens portions 240 located on the first axis L1 is defined as a first intersection area A1, and another portion of these lens portions 240 are arranged along a second axis L2, whereby an overlapping area formed by the intersection of the outer contours P of adjacent lens portions 240 located on the second axis L2 is defined as a second intersection area A2, whereby the first axis L1 and the second axis L2 intersect to form an included angle θ. In this embodiment, the first axis L1 and the second axis L2 are perpendicular to each other, and the lens units 240 are arranged in two rows in the horizontal direction, i.e., one row of the lens units 240 is arranged along the first axis L1, and the other row of the lens units 240 is arranged in a direction parallel to the first axis L1. From the above, it can be seen that the number of the lens units 240 on the second axis L2 or in the direction parallel to the second axis L2 is two. It should be noted that the arrangement of the lens units is not limited to two rows and can be increased or decreased as needed. Furthermore, when the included angle θ is not 90 degrees, the arrangement direction of the lens units is arranged along the actual extending direction of the first axis L1 and the second axis L2, respectively.

[0018] Here, the ratio A / C of the area A of each first intersection region A1 overlapping the lens portions 240 arranged along the first axis L1 to the area C covered by the outer contour P of that lens portion 240 is 0.1 to 0.5. The area C of the outer contour P of the lens portion 240 refers to the area of ​​the original outer contour P of that lens portion 240 when it does not overlap with other lens portions 240. For example, in this embodiment, the outer contour P is a perfect circle. In this embodiment, the radius r of each lens portion 240 is, for example, 5.4 mm, and the area C of the outer contour P is found to be 29.16π square millimeters. Therefore, the area of ​​the first intersection region A1 is found to be 9.16 to 45.8 square millimeters according to the ratio A / C of 0.1 to 0.5. In the preferred case, when the area A of the first intersection region A1 is 13.94 to 42.5 square millimeters, the purpose of better preventing overlapping of light and shadow can be achieved, and it is optimal when the area A of the first intersection region A1 is 32.22 square millimeters.

[0019] The ratio B / C of the area of ​​the second intersection region A2 where these lens portions 240 are arranged and overlapped along the second axis L2 to the area C of the outer contour P of the lens portion 240 is 0.02 to 0.1. The definition of the outer contour P of the lens portion 240 is the same as above, so an explanation will be omitted here. In this example, the outer contour P of each lens portion 240 is a perfect circle with a radius of, for example, 5.4 mm. Based on this, the area C of the outer contour P is found to be 29.16π square millimeters. According to the limited range of 0.02 to 0.1 for the ratio B / C, the area of ​​the second intersection region A2 is found to be 1.83 to 9.16 square millimeters. In a preferred case, when the area B of the second intersection region A2 is 2.19 to 8.52 square millimeters, the purpose of better avoiding overlapping of light and shadow can be achieved, and it is optimal when the area B of the second intersection region A2 is 2.19 square millimeters.

[0020] As shown in Figures 6 to 8, it should be noted that when the outer contour P of the lens portion 240 is a perfect circle, the areas obtained in the first intersection region A1 and the second intersection region A2 are related to the center distance of adjacent lens portions 240, and further, among these lens portions 240, there is a first interval ra between the center portions of adjacent lens portions 240 along the first axis L1, and the center portion of the lens portion 240 is the center of the recessed hole 242, and here, the ratio ra / r of the first interval ra to the radius r of the outer contour P of each lens portion 240 is 0.8 to 1.5. In this embodiment, the radius r of the outer contour P of each lens portion 240 is, for example, 5.4 mm, and the ratio ra / r of the first spacing ra to the radius r of the outer contour P of each lens portion 240 is 0.8 to 1.5, so that the first spacing ra is 4.32 to 8.1 mm. In a preferred case, when the first spacing ra is 4.7 to 8 mm, the objective of better preventing overlapping of light and shadow can be achieved, and it is optimal for the area A of the first intersection region A1 to be 5.79 square mm.

[0021] Among these lens portions 240, there is a second interval rb between the central portions of adjacent lens portions 240 along the second axis L2, and the central portions of the lens portions 240 are the centers of the recessed holes 242. Here, the ratio rb / r of the second interval rb to the radius r of the outer contour P of each lens portion 240 is 1.5 to 1.9. In this embodiment, the radius r of the outer contour P of each lens portion 240 is, for example, 5.4 mm. Since the ratio rb / r of the second interval rb to the radius r of the contour P of each lens portion 240 is 1.5 to 1.9, the second interval rb is 8.1 to 10.26 mm. In a preferred case, when the second interval rb is 8.8 to 10 mm, the objective of better avoiding overlapping of light and shadows can be achieved, and a second interval rb of 10 mm is optimal.

[0022] The LEDs 220 of the lens device 20 each have a light-emitting surface 222, which corresponds to the recess 242 of the lens section 240. Light emitted from the LEDs 220 enters the corresponding lens section 240 through the light-emitting surface 222, is refracted, and passes through the backlight surface 24B and the translucent base 30. The first intersection area A1, the second intersection area A2, the first interval ra, and the second interval rb formed by the overlapping of the base sections 244 of the lens sections 240 allow the light emitted from the LEDs 220 to be refracted through the lens sections 240 to form a concentrated luminous flux LB. When the luminous flux LB illuminates an object, it does not cause overlapping of light and shadows on the object, thereby improving the clarity and quality of the illumination of the object. In addition, the distribution of the light beam LB can be controlled by the overlapping range of the root portions 244 of the lens portions 240 in order to increase the overall illuminance value of the light beam.

[0023] As shown in FIG. 3 , the backlight surface 24B of the substrate 24 has a light-transmitting region DT and a peripheral region DS. The light-transmitting region DT covers at least the area where the root portions 244 of all the lens portions 240 are connected to the light-irradiation surface 24A, while the portion outside the light-transmitting region 228 forms the peripheral region DS. At least the light-transmitting region DT of the backlight surface 24B is provided with a plurality of convex particles, each with a radius of curvature of 2 mm and a length and width of 1 mm. This uniformly disperses the light beam LB projected from the light-emitting diodes 220 through the lens portions 240, softening the projected light beam LB. When the light beam LB illuminates an object, the object's shadow becomes softer and more natural. In this embodiment, the convex particles are provided at least in the light-transmitting region DT. However, in other embodiments, the convex particles may be provided in the peripheral region DS or the entire backlight surface 24B.

[0024] The user can also roughen the backlight surface 24B of the substrate 24. In one embodiment, this roughening involves spraying 100-mesh sand particles onto the backlight surface 24B of the substrate 24 with high-pressure air to form a rough surface. The centerline average roughness Ra of this rough surface is 0.2 μm or greater. The sand particles used for this roughening process may be 100 mesh, for example, but the selected particle size can be adjusted as needed. When light from the LEDs 220 passes through the lens sections 240 and the substrate 24, the roughened surface uniformly scatters the incident light, thereby reducing reflection and scattering and effectively eliminating yellow halos.

[0025] It should be noted that the user can provide the roughened surface on the backlight surface 24B of the substrate 24 alone, or can provide these convex particles alone in at least the light-transmitting area DT of the backlight surface 24B, or can provide these convex particles in the light-transmitting area DT or the light-transmitting area DT and the surrounding area DS, and then form the roughened surface on the backlight surface 24B by glass sandblasting, or these convex particles and the roughened surface do not have to be provided, that is, these convex particles and the roughened surface can be selectively provided or not provided according to the user's needs.

[0026] The above is merely a preferred embodiment of the present invention, and any equivalent modifications within the scope of the specification and patent scope of the present invention should be included in the patent scope of the present invention. [Explanation of symbols]

[0027] 100: Illumination lamp having a lens device 10. Lamp holder 12. Holder body 14: Head base 142: Plug 16: Bass 20: Lens device 22: Circuit board 220: Light-emitting diode 222: Light-emitting surface 24: Circuit board 24A: Light irradiation surface 24B: Backlight surface 240: Lens section 242: Concave hole 244: Base 30:Translucent base 32: Translucent plate 34: Outer frame 342: Groove 36: Upper cover plate 362: Fasteners S: Containment space P: Outer contour θ: Angle DT: Translucent area DS: Surrounding area A1: First intersection area A2:Second intersection area ra: 1st interval rb: second interval L1: 1st axis L2: 2nd axis LB: Luminous flux

Claims

1. a substrate having a light irradiation surface and a backlight surface, the light irradiation surface being provided with a plurality of lens portions, each of the plurality of lens portions having a recess and a base portion, the base portion being connected to the light irradiation surface, an outer contour being formed at a portion where the base portions of the plurality of lens portions are connected to the light irradiation surface, and an overlapping region being formed by the intersection of the outer contours of adjacent lens portions; a plurality of light-emitting diodes are provided on one side of the light irradiation surface of the substrate, each of the plurality of light-emitting diodes having a light-emitting surface, the light-emitting surface including a circuit board corresponding to the recessed hole of the lens portion; At least some of the lens portions are arranged along a first axis, and an overlapping region formed by an intersection of outer contours of adjacent lens portions positioned on the first axis is defined as a first intersection region; At least a portion of the plurality of lens portions are arranged along a second axis, and an overlapping region formed by an intersection of outer contours of adjacent lens portions positioned along the second axis is defined as a second intersection region; a ratio A / C of an area A of the first intersection region to an area C of the outer contour of the lens portion is 0.1 to 0.5, and the area A of the first intersection region is 13.94 to 42.5 square millimeters; a ratio B / C of an area B of the second intersection region to an area C of the outer contour of the lens portion is 0.02 to 0.1, the area B of the second intersection region is 2.19 to 8.52 square millimeters, the first axis line and the second axis line intersect at 90 degrees, a first distance ra between center portions of adjacent lens portions positioned on the first axis, the center portions of the lens portions being centers of the recesses, and the first distance ra being 4.7 to 8 millimeters; There is a second interval rb between central portions of adjacent lens portions positioned on the second axis, the central portions of the lens portions being the centers of the recesses, and the second interval rb is 8.8 to 10 millimeters. Lens device.

2. A lens device as described in claim 1, wherein the ratio ra / r of the first spacing ra to the radius r of the outer contour of each lens portion is 0.8 to 1.

5.

3. A lens device as described in claim 2, wherein the ratio rb / r of the second spacing rb to the radius r of the outer contour of each lens portion is 1.5 to 1.

9.

4. The lens device according to claim 1 , wherein the backlight surface of the substrate has a rough surface, and the rough surface has a center line average roughness Ra of 0.2 μm or more.

5. The lens device according to claim 1 , wherein the backlight surface of the substrate has a light-transmitting region, and the range of the light-transmitting region covers at least an area where the root portions of all of the plurality of lens portions are connected to the light irradiation surface.

6. The lens device according to claim 5 , wherein a plurality of convex particles are formed in the light-transmitting region of the backlight surface.

7. An illumination lamp having a lens device, a lamp holder having a storage space; a lens device provided in the accommodation space of the lamp holder, the lens device including a substrate and a circuit board, the substrate having a light irradiation surface and a backlight surface, the light irradiation surface of the substrate having a plurality of lens portions, each of the plurality of lens portions having a recess and a base portion, an outer contour formed at a portion where the base portion is connected to the light irradiation surface, and an overlapping region formed by the intersection of the outer contours of adjacent lens portions; the circuit board being located on one side of the light irradiation surface of the substrate, a plurality of light emitting diodes being provided on one side of the circuit board, each of the plurality of light emitting diodes having a light emitting surface, each light emitting surface corresponding to the recess of the lens portion; a translucent base coupled to the lamp holder and facing a backlight surface of the substrate of the lens device, wherein light generated from the plurality of light emitting diodes is incident on corresponding lens portions from the light emitting surfaces and then passes through the backlight surface and the translucent base; At least some of the lens portions are arranged along a first axis, and an overlapping region formed by an intersection of outer contours of adjacent lens portions positioned on the first axis is defined as a first intersection region; At least a portion of the plurality of lens portions are arranged along a second axis, and an overlapping region formed by an intersection of outer contours of adjacent lens portions positioned on the second axis is defined as a second intersection region, and the first axis and the second axis intersect at 90 degrees; a ratio A / C of an area A of the first intersection region to an area C of the outer contour of the lens portion is 0.1 to 0.5, and the area A of the first intersection region is 13.94 to 42.5 square millimeters; a ratio B / C of an area B of the second intersection region to an area C of the outer contour of the lens portion is 0.02 to 0.1, and the area B of the second intersection region is 2.19 to 8.52 square millimeters; a first distance ra between center portions of adjacent lens portions positioned on the first axis, the center portions of the lens portions being centers of the recesses, and the first distance ra being 4.7 to 8 millimeters; There is a second interval rb between central portions of adjacent lens portions positioned on the second axis, the central portions of the lens portions being the centers of the recesses, and the second interval rb is 8.8 to 10 millimeters. An illumination lamp having a lens device.

8. 8. The illumination lamp with a lens device according to claim 7, wherein the light-transmitting base includes a light-transmitting plate, an outer frame, and an upper cover plate, the light-transmitting plate covers the backlight surface of the substrate, the outer frame has a groove on the inside, the light-transmitting plate is fixed in the groove of the outer frame, and the upper cover plate presses the outer frame and is fixed to the lamp holder.

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