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 a lighting lamp, and more particularly to a lens device for suppressing the overlap of light and shadow and a lighting lamp having the lens device.

Background Art

[0002] Light-emitting diode lighting devices are generally known to be used in combination with a collimating lens (see, for example, Patent Document 1). The collimating lens can focus the scattered light beam emitted from the light-emitting diode in a specific direction, thereby improving the brightness and illumination effect of the light beam. Further, the angle and distribution of the light beam may be controlled by the collimating lens so that the light is uniformly distributed in a specific area.

[0003] Conventional lighting lamps are generally composed of a plurality of sets of collimating lenses and light-emitting diodes distributed in an array at intervals. The light rays emitted from the light-emitting diodes irradiate the collimating lenses to form reflected light beams, and each set of collimating lenses and light-emitting diodes forms a reflected light beam.

[0004] However, when a plurality of reflected light beams irradiate an object, since the distribution of each light beam and the angle of irradiation on the object are different, when the light beam irradiates the object, the light and shadow clearly overlap on the shadow of the object, and the overlap of the light and shadow makes the user feel uncomfortable when viewed by the user.

[0005] The above are the drawbacks of conventional lighting lamps, and the present inventor has made intensive efforts to devise a lens device and a lighting lamp having the lens device so as to improve the above problems.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

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 capable of effectively suppressing the overlap of light and shadow depending on the installation position of the lens.

[0008] Another object of the present invention is to provide a lighting lamp having a lens device that suppresses the problem of overlap of light and shadow depending on the installation position of the lens and increases the illuminance value of the light beam by providing a plurality of lenses and a plurality of 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. A plurality of lens portions are provided on the light irradiation surface. These lens portions each have a concave hole and a root portion. The root portion is connected to the light irradiation surface. An outer contour is formed at a portion where the root portion of these lens portions is connected to the light irradiation surface, and an overlapping region is formed by the intersection of the outer contours of adjacent lens portions. The circuit board is located on one side of the light irradiation surface of the substrate. A plurality of light-emitting diodes are provided on one side surface of the circuit board. These light-emitting diodes each have a light-emitting surface, and each light-emitting surface corresponds to the concave hole of the lens portion.

[0010] The present invention further provides an illuminating lamp having a lens device including a lamp holder, a lens device, and a light-transmitting base. The lamp holder has an accommodation space. The lens device is provided in the accommodation space of the lamp holder and includes a substrate and a circuit board. The substrate has a light irradiation surface and a backlight surface. A plurality of lens portions are provided on the light irradiation surface of the substrate. These lens portions each have a concave hole and a root portion. An outer contour is formed at a portion where the root portion is connected to the light irradiation surface, and an overlapping region is formed by the intersection of the outer contours of adjacent lens portions. The 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 surface of the circuit board. These light-emitting diodes each have a light-emitting surface, and each light-emitting surface corresponds to the concave hole of the lens portion. The light-transmitting base is coupled to the lamp holder and faces the backlight surface of the substrate of the lens device. The light generated from these light-emitting diodes enters the corresponding lens portion from the light-emitting surface and then passes through the backlight and the light-transmitting base.

Effects of the Invention

[0011] The effects of the present invention are that the root portions of these lens portions overlap each other, but the light rays emitted from these light-emitting diodes are refracted through these lens portions to form a concentrated light beam. When the light beam irradiates an object, the periphery of the shadow of the object is made clearer, and the phenomenon of overlapping of light and shadow is avoided, thereby improving the clarity and quality of the illumination of the object. Also, since the root portions of these lens portions are provided to overlap each other, the direction and distribution of these light beams can be effectively controlled, and the overall illuminance value of the light rays can also be increased.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

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Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0013] Hereinafter, in order to explain the present invention more clearly, preferred embodiments will be given and described in detail with reference to the drawings. As shown in FIGS. 1 to 3, a lighting 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 accommodation space S, and the lamp holder 10 includes a holder body 12, a head base 14, and a base 16. The head base 14 is provided on one side of the holder body 12, and the base 16 is located on the other side of the holder body 12 and faces the head base 14. Here, the head base 14 has a plug 142, and the plug 142 is connected to a power source to provide power transmission. In this embodiment, the material of the lamp holder 10 is an aluminum alloy, and in other embodiments, other materials may be used.

[0015] The lens device 20 is provided in the accommodation space S of the lamp holder 10. The lens device 20 includes a circuit board 22 and a substrate 24. The circuit board 22 was previously accommodated in the accommodation space S. A plurality of light-emitting diodes 220 are provided on one side surface of the circuit board 22. The substrate 24 has a light-irradiating surface 24A and a backlight surface 24B. A plurality of lens portions 240 are provided on the light-irradiating surface 24A of the substrate 24. Here, the substrate 24 is laminated and provided on the circuit board 22, that is, the circuit board 22 is located on the light-irradiating surface 24A side of the substrate 24, and these light-emitting diodes 220 are provided corresponding to the positions of these lens portions 240. Thus, the light generated from these light-emitting diodes 220 passes through these lens portions 240 and enters the light-transmitting base 30.

[0016] The light-transmitting base 30 faces the backlight surface 24B of the substrate 24 of the lens device 20. The light-transmitting base 30 includes a light-transmitting plate 32, an outer frame 34, and an upper cover plate 36. Here, the light-transmitting plate 32 covers the backlight surface 24B of the substrate 24. There is a groove 342 inside the outer frame 34, and the light-transmitting plate 32 is fixed in the groove 342 of the outer frame 34. Since the upper cover plate 36 presses the outer frame 34, the outer frame 34 is fixed between the lamp holder 10 and the upper cover plate 36. By a plurality of fasteners 362 passing through the upper cover plate 36, it is directly fixed to the holder body 12 of the lamp holder 10. Here, since the light-transmitting plate 32 and the upper cover plate 36 are made of a light-transmitting material, the light generated from these light-emitting diodes 220 can pass through the lens device 20 and the light-transmitting base 30 and irradiate the outside.

[0017] As shown in FIGS. 4 to 5, the lens device 20 will be described in more detail. These lens portions 240 of the lens device 20 have a structure integrally formed with the substrate 24 in this embodiment. Each lens portion 240 has a concave hole 242 and a root portion 244. The root portion 244 is connected to the light irradiation surface 24A. An outer contour P is formed at the portion where the root portions 244 of these lens portions 240 are connected to the light irradiation surface 24A. Here, an overlapping region is formed by the intersection of the outer contours P of adjacent lens portions 240. A part of these lens portions 240 is arranged along the first axis L1. Thus, the overlapping region formed by the intersection of the outer contours P of adjacent lens portions 240 located on the first axis L1 is defined as the first intersection region A1. Another part of these lens portions 240 is arranged along the second axis L2. Thus, the overlapping region formed by the intersection of the outer contours P of adjacent lens portions 240 located on the second axis L2 is defined as the second intersection region A2. Here, 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 provided perpendicularly. These lens portions 240 are arranged in two rows in the lateral direction. That is, one row of lens portions 240 is arranged along the first axis L1, and the other row of lens portions 240 is arranged along a direction parallel to the first axis L1. From the above, it can be seen that the number of lens portions 240 in the direction of the second axis L2 or in a direction parallel to the second axis L2 is two. It should be noted that the arrangement method of the lens portions is not limited to the above two rows and can be increased or decreased as needed. Also, when the included angle θ is not 90 degrees, the arrangement directions of the lens portions are respectively provided along the actual extending directions of the first axis L1 and the second axis L2.

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

[0019] The ratio B / C of the area of the second intersection region A2 formed by overlapping these lens units 240 arranged along the second axis L2 to the area C of the outer contour P of the lens unit 240 is 0.02 to 0.1. Since the definition of the outer contour P of the lens unit 240 is the same as above, the description is omitted here. In this embodiment, the outer contour P of each lens unit 240 is a perfect circle, and the radius is, for example, 5.4 mm. Based on this, it can be seen that the area C of the outer contour P is 29.16π square millimeters. According to the limited range of 0.02 to 0.1 of the ratio B / C, it can be seen that the area of the second intersection region A2 is 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 the overlap of light and shadow can be achieved, and when the area B of the second intersection region A2 is 2.19 square millimeters, it is optimal.

[0020] As shown in FIGS. 6 to 8, as to what needs to be explained, when the outer contour P of the lens unit 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 the adjacent lens units 240. Further, among these lens units 240, there is a first interval ra between the central portions of the adjacent lens units 240 along the first axis L1. The central portion of the lens unit 240 is the center of the concave hole 242. Here, the ratio ra / r of the first interval ra to the radius r of the outer contour P of each lens unit 240 is 0.8 to 1.5. In this embodiment, the radius r of the outer contour P of each lens unit 240 is, for example, 5.4 millimeters. In accordance with the ratio ra / r of the first interval ra to the radius r of the outer contour P of each lens unit 240 being 0.8 to 1.5, the first interval ra is 4.32 to 8.1 millimeters. In a preferred case, when the first interval ra is 4.7 to 8 millimeters, the purpose of better preventing the overlapping of light and shadow can be achieved, and it is optimal when the area A of the first intersection region A1 is 5.79 square millimeters.

[0021] Among these lens units 240, there is a second interval rb between the central portions of the adjacent lens units 240 along the second axis L2. The central portion of the lens unit 240 is the center of the concave hole 242. Here, the ratio rb / r of the second interval rb to the radius r of the outer contour P of each lens unit 240 is 1.5 to 1.9. In this embodiment, the radius r of the outer contour P of each lens unit 240 is, for example, 5.4 millimeters. In accordance with the ratio rb / r of the second interval rb to the radius r of the contour P of each lens unit 240 being 1.5 to 1.9, the second interval rb is 8.1 to 10.26 millimeters. In a preferred case, when the second interval rb is 8.8 to 10 millimeters, the purpose of better avoiding the overlapping of light and shadow can be achieved, and it is optimal when the second interval rb is 10 millimeters.

[0022] These light-emitting diodes 220 of the lens device 20 each have a light-emitting surface 222, and each light-emitting surface 222 corresponds to the concave hole 242 of the lens portion 240. The light generated from these light-emitting diodes 220 enters the corresponding lens portion 240 from the light-emitting surface 222, is refracted, and passes through the backlight surface 24B and the light-transmitting base 30. Due to the overlapping of the root portions 244 of these lens portions 240 with each other, the first intersection region A1, the second intersection region A2, the first interval ra, and the second interval rb, the light rays emitted from these light-emitting diodes 220 are refracted through these lens portions 240 to form a concentrated light beam LB. When the light beam LB irradiates an object, it does not cause the phenomenon of the overlapping of light and shadow in the shadow of the object, thereby improving the sharpness and quality of the illumination of the object. In addition, in order to increase the overall illuminance value of the light rays, the distribution of these light beams LB can also be controlled by the overlapping range of the root portions 244 of these lens portions 240.

[0023] Also, 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 range of the light-transmitting region DT covers at least the area where all the root portions 244 of these lens portions 240 are connected to the light-irradiating surface 24A, while the outer portion of the light-transmitting region 228 forms the peripheral region DS. Here, a plurality of convex particles are provided at least in the light-transmitting region DT of the backlight surface 24B. The radius of curvature of these convex particles is 2 millimeters, and the length and width of each convex particle are 1 millimeter respectively. Thereby, since the light beam LB projected from these light-emitting diodes 220 through these lens portions 240 is uniformly dispersed, the projected light beam LB becomes softer. When this light beam LB irradiates the object, the light and shadow of the object can become softer and more natural. In this embodiment, these 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] In addition, the user can perform a roughening process on the backlight surface 24B of the substrate 24. In one embodiment, the roughening process refers to spraying sand particles with a particle size of 100 mesh onto the backlight surface 24B of the substrate 24 using a high-pressure air stream to form a rough surface. The center line average roughness Ra of this rough surface is 0.2 μm or more. Note that the particle size of the sand particles used in the above roughening process is, for example, 100 mesh, but the selected particle size is adjusted as necessary. Thereby, when the light from these light-emitting diodes 220 passes through these lens portions 240 and transmits through the substrate 24, the rough surface uniformly scatters the incident light, thereby reducing the reflection and scattering phenomena and effectively removing the yellow light ring.

[0025] It should be noted that the user can provide the rough surface alone on the backlight surface 24B of the substrate 24, or can also provide these convex particles alone in at least the light-transmitting region DT of the backlight surface 24B. Alternatively, after providing these convex particles in the light-transmitting region DT or the light-transmitting region DT and the surrounding region DS, the rough surface can be formed on the backlight surface 24B by glass sandblasting. It is not necessary to provide these convex particles and the rough surface. That is, these convex particles and the rough surface may be selectively provided or not provided according to the user's needs.

[0026] The above is only a preferred embodiment of the present invention, and equivalent changes within the scope of application of the specification and patent scope of the present invention should be included in the patent scope of the present invention.

Explanation of reference numerals

[0027] 100: Lighting lamp having a lens device 10: Lamp holder 12: Holder body 14: Head base 142: Plug 16: Base 20: Lens device 22: Circuit board 220: Light-emitting diode 222: Light emitting surface 24: Substrate 24A: Light irradiation surface 24B: Backlight surface 240: Lens part 242: Concave hole 244: Root part 30: Translucent base 32: Translucent plate 34: Outer frame 342: Groove 36: Upper cover plate 362: Fastener S: Accommodation space P: Outer contour θ: Angle DT: Translucent region DS: Peripheral region A1: First intersection region A2: Second intersection region ra: First interval rb: Second interval L1: First axis L2: Second axis LB: Light beam

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 lens portions having a recess and a root portion, the root portion being connected to the light irradiation surface, an outer contour being formed at a portion where the root portion of the lens portions is connected to the light irradiation surface, and an overlapping region being formed by the intersection of the outer contours of adjacent lens portions; A lens device comprising: a circuit board located on one side of the light irradiation surface of the substrate, a plurality of light emitting diodes provided on one side, the plurality of light emitting diodes each having a light emitting surface, each light emitting surface corresponding to the recessed hole of the lens portion.

2. The lens device according to claim 1 , wherein at least a portion of the plurality of lens portions are arranged along a first axis, and an overlap region formed by an intersection of outer contours of adjacent lens portions positioned on the first axis is defined as a first intersection region.

3. 3. The lens device according to claim 2, wherein at least a portion of the plurality of lens portions are arranged along a second axis, an overlapping region formed by an intersection of outer contours of adjacent lens portions located on the second axis is defined as a second intersection region, and the first axis and the second axis intersect to form an included angle.

4. 3. The lens device according to claim 2, wherein 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.

5. 5. The lens device of claim 4, wherein the area A of the first intersection region is between 13.94 and 42.5 square millimeters.

6. 4. The lens device according to claim 3, wherein 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.

7. 7. The lens device of claim 6, wherein the area B of the second intersection region is 2.19 to 8.52 square millimeters.

8. 3. The lens device according to claim 2, wherein there is a first interval ra between central portions of adjacent lens portions located on the first axis, the central portions of the lens portions being the center of the recessed hole, and a ratio ra / r of the first interval ra to a radius r of the outer contour of each lens portion is 0.8 to 1.

5.

9. The lens apparatus of claim 8 , wherein the first distance ra is between 4.7 and 8 millimeters.

10. 4. The lens device according to claim 3, wherein there is a second interval rb between central portions of adjacent lens portions located on the second axis, the central portions of the lens portions being the centers of the recesses, and a ratio rb / r of the second interval rb to a radius r of the outer contour of each lens portion is 1.5 to 1.

9.

11. The lens apparatus of claim 10, wherein the second distance rb is between 8.8 and 10 millimeters.

12. 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.

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

14. The lens arrangement of claim 13 , wherein the light-transmitting area of ​​the backlight surface includes a plurality of convex particles.

15. 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 being provided with a plurality of lens portions, the plurality of lens portions each having a recess and a root portion, an outer contour being formed at a portion where the root portion is connected to the light irradiation surface, and an overlapping region being 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, the plurality of light emitting diodes each having a light emitting surface, each light emitting surface being a lens device corresponding to the recess of the lens portion; An illumination lamp having a lens device, the lens device being connected to the lamp holder and facing a backlight surface of the substrate of the lens device, and the light generated from the plurality of light-emitting diodes being incident on corresponding lens portions from the light-emitting surfaces and then passing through the backlight surface and the translucent base.

16. The illumination lamp having the lens device of claim 15, 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 is fixed to the lamp holder by pressing the outer frame.

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