JP2010092700A - Light distribution structure of led lighting apparatus - Google Patents

Light distribution structure of led lighting apparatus Download PDF

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Publication number
JP2010092700A
JP2010092700A JP2008261149A JP2008261149A JP2010092700A JP 2010092700 A JP2010092700 A JP 2010092700A JP 2008261149 A JP2008261149 A JP 2008261149A JP 2008261149 A JP2008261149 A JP 2008261149A JP 2010092700 A JP2010092700 A JP 2010092700A
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light
lens unit
light distribution
lens
plate
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JP2008261149A
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JP4883648B2 (en
JP2010092700A5 (en
Inventor
Shigetoshi Fujitani
Shojun Ikeda
Takeshi Inoue
Yoshihiro Shima
武士 井上
義拓 島
昌順 池田
繁年 藤谷
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Idec Corp
Idec株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide an LED lighting device capable of easily changing a light distribution characteristic of irradiation light.
In a light distribution structure of an LED lighting device, a light source having a plurality of light emitting diodes (LEDs) 2 and a plurality of lenses 30 disposed on the LEDs 2 corresponding to the LEDs 2 are provided. And a light distribution characteristic changing means for changing the light distribution characteristic of the light emitted from the light source. The light distribution characteristic changing means has a distance variable mechanism that makes the distance between the lens 30 and the LED 2 variable. The light distribution characteristic changing means is composed of, for example, the solenoid 4 provided below the bottom plate portion 31 that supports the lens 20, and the tip of the plunger 4 a of the solenoid 4 is in contact with the lower surface of the bottom plate portion 31. .
[Selection] Figure 3

Description

  The present invention relates to an LED lighting device using a light emitting diode (LED), and more particularly, to an improvement in structure for easily changing a light distribution characteristic of irradiation light.

  As an LED lighting device using a light emitting diode as a light source, the present applicant has proposed a device as shown in Japanese Patent No. 3165388. This LED illumination device is composed of an LED unit including an LED light emitting element, a prism sheet, a diffusion plate, and the like disposed above the LED unit.

In this case, the light emitted from the LED unit is dispersed by the prism sheet and diffused by the diffusion plate, thereby being emitted as uniform light from the entire display surface of the device.
Japanese Patent No. 3165388 (see FIG. 2)

  The conventional LED illuminating device mainly aims to prevent the occurrence of unevenness in the light amount and color by making the emitted light uniform, and therefore consideration is given to changing the light distribution characteristics of the irradiation light. It has not been.

  The present invention has been made in view of such a conventional situation, and a problem to be solved by the present invention is to provide an LED illumination device that can easily change the light distribution characteristics of irradiation light. . Moreover, this invention is changing the light distribution characteristic of irradiation light by making the distance of LED and an optical member variable. Furthermore, the present invention attempts to change the light distribution characteristics of the irradiation light by changing the inclination of the optical member with respect to the optical axis of the LED.

  The light distribution structure of the LED lighting device according to the invention of claim 1 is disposed on each light emitting diode corresponding to each light emitting diode, and a light source having at least one light emitting diode (LED) disposed thereon. And a light distribution characteristic changing unit that has at least one optical member and changes the light distribution characteristic of the light emitted from the light source.

  According to the invention of claim 1, since the light distribution characteristic changing means including the optical member is provided on the light emitting diode, the light emitted from the light emitting diode is incident on the light distribution characteristic changing means through the optical member. The light distribution characteristics of the emitted light can be easily changed. This makes it easy to obtain a desired illuminance at a desired site.

  In invention of Claim 2, in Claim 1, an optical member can be changed into the optical member from which a light distribution characteristic differs.

  In this case, the light distribution characteristic of the light emitted from the optical member can be easily changed by causing the light emitted from the light emitting diode to enter the optical member having a different light distribution characteristic. In the case of using a lens as an optical member, in order to change the light distribution characteristic of the lens, the radius of curvature of the lens is changed, the optical axis of the lens is inclined, or the material of the lens body is changed. Thus, the refractive action of the lens may be changed.

  According to a third aspect of the present invention, in the first aspect, the light distribution characteristic changing means includes a distance variable mechanism for changing a distance between the optical member and the light emitting diode.

  In this case, by changing the distance between the optical member and the light-emitting diode by the distance variable mechanism, the optical diode is positioned at the focal position of the optical member, or on the inside or outside of the optical member. The light distribution characteristics of the light emitted from the member can be easily changed.

  According to a fourth aspect of the present invention, in the first aspect, the light distribution characteristic changing means has a tilt mechanism for tilting the optical member so that the optical member is tilted with respect to the optical axis of the light emitting diode.

  In this case, by tilting the optical member with respect to the optical axis of the light emitting diode by the tilt mechanism, the incident angle of the light incident on the optical member is changed, and thereby the distribution of the light emitted from the optical member is changed. Light characteristics can be easily changed.

  According to a fifth aspect of the present invention, in the first aspect, each optical member has a fitting portion for connecting to each other.

  In this case, since a plurality of optical members can be connected together via the fitting portion, the assembly of the apparatus can be improved.

  As described above, according to the light distribution structure of the LED lighting device according to the present invention, the light distribution characteristic changing means including the optical member is provided on the light emitting diode, so that the light emitted from the light emitting diode is optical. By entering the light distribution characteristic changing means through the member, the light distribution characteristic of the emitted light can be easily changed.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 to 7 are diagrams for explaining a light distribution structure of an LED lighting device according to an embodiment of the present invention. FIG. 1 is an LED lighting device employing the light distribution structure according to an embodiment of the present invention. 2 is a side view thereof, FIG. 3 is a sectional view taken along line III-III of FIG. 1, FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is a lens unit constituting the light distribution structure. FIG. 5A is a diagram showing a modification of the lens unit, FIG. 6A is a front view of the lens unit, FIG. 5B is a side view thereof, FIG. 5C is an end view, and FIG. (E) is a figure for demonstrating the light distribution characteristic of the emitted light by various lens units. In FIG. 3, hatching is omitted for convenience of illustration. In each figure, the left-right direction in FIGS. 1 to 3 is the longitudinal direction of the apparatus, the up-down direction in FIG. 1 is the width direction, and the up-down direction in FIGS. 2 and 3 is the up-down direction.

  As shown in FIGS. 1 to 3, the LED lighting device 1 includes a box-shaped housing 10 that opens upward and accommodates a light source, and a lid 11 that closes an upper opening of the housing 10. Both the casing 10 and the lid 11 are extended in the longitudinal direction.

  Inside the housing 10, a plurality of LEDs (light emitting diodes) 2 are arranged at predetermined equal intervals in the longitudinal direction. These LEDs 2 constitute a light source of the present illumination device. Each LED 2 is mounted on a substrate, for example. On each LED 2, a lens unit 3 for orienting the light emitted from the LED 2 is provided. Each lens unit 3 has a convex lens (lens body) 30 provided corresponding to each LED 2. The lenses 30 are arranged at predetermined equal intervals in the longitudinal direction corresponding to the LEDs 2. The lid body 11 is formed with a window hole 11a extending in the longitudinal direction while penetrating the lid body 11 up and down. A translucent plate 12 is disposed below the window hole 11a.

  As shown in FIG. 4, the lid 11 includes a hanging portion 15 that hangs downward from both edges in the width direction, and a bent portion 16 that is bent inward of the housing 10 from the lower end of the hanging portion 15. have. The hanging portion 15 and the bent portion 16 extend in the longitudinal direction. On the other hand, the housing 10 has a pair of concave grooves 10 a extending in the longitudinal direction on both outer side surfaces in the width direction, and the concave grooves 10 a receive the bent portions 16 of the lid body 10. Further, the screw portion of the screw 13 extends into the concave groove 10 a from the bottom surface side of the housing 10, and the screw portion is screwed into the bent portion 16. A packing 14 is provided in the upper opening of the housing 10, and the outer peripheral edge of the plate 12 is sandwiched by the packing 14. By tightening the screw 13, the lid body 11 moves to the side of the housing 10 via the bent portion 16 and the hanging portion 15, so that the lid body 11 is fixed to the housing 10 via the packing 14. It has become.

  The lens unit 3 is, for example, a resin molded product, and as shown in FIGS. 5 and 6, as shown in FIG. 5 and FIG. 6, a pair of side plate portions 32 arranged in the vertical direction perpendicular to the bottom plate portion 31 on both sides thereof. The bottom plate portion 31 is provided with two lenses 30. Here, although an example in which two lenses 30 are provided in each lens unit 3 is shown, the application of the present invention is not limited to this, and each lens unit 3 is configured as shown in FIG. Only one lens 30 may be included, or three or more lenses 30 may be included.

  Each side plate portion 32 of the lens unit 3 is formed with a long hole 32a extending in the longitudinal direction. Further, one or a plurality of projecting portions 32b projecting upward are formed on the upper surface of each side plate portion 32, and one or a plurality of leg portions 32c projecting downward are formed on the bottom surface of each side plate portion 32. Is formed.

  When the lens unit 3 is accommodated in the housing 10, the leg portion 32 c of the lens unit 3 is inserted into an attachment hole (not shown) provided in the substrate on which the LED 2 is mounted, for example, so that the inside of the housing 10 Can be attached to. Further, when the lens unit 3 is accommodated in the housing 10, the lid body 11 is attached, and the screw 13 is tightened, each protrusion 32 b of each side plate portion 32 of the lens unit 3 is pressed by the lower surface of the plate 12. (See FIG. 4). Then, the long holes 32a of the side plate portions 32 are compressed in the vertical direction and elastically deformed, whereby the lens unit 3 is elastically held in the internal space of the housing 10. In this way, rattling of the lens unit 3 can be prevented and the relative positioning of the lens 30 and the LED 2 can be performed with high accuracy.

  In the LED lighting device 1 configured as described above, since the lens unit 3 is provided separately from the LED 2, a part or all of the lens unit 3 is replaced with another lens unit having a lens 30 having a different refractive action. By exchanging, the light distribution characteristic of the LED lighting device can be easily changed. That is, in this case, the lens unit 3 itself constitutes the light distribution characteristic changing means of the LED lighting device 1.

  7A to 7E show the light distribution characteristics of the LED lighting device 1 by the various lens units 3. In each figure, the left figure shows the illuminance by the emitted light L from each LED illumination device 1, and the right figure shows the schematic configuration of the LED 2 and the lens unit 3 constituting the LED illumination apparatus 1. The lens 30 ′ is a convex lens that is thicker than the lens 30, has a stronger focusing effect than the lens 30, and has a shorter focal length. For this reason, the light distribution characteristic of the lens 30 ′ is different from the light distribution characteristic of the lens 30.

  In the example shown in FIG. 7A, the lens unit 3 is composed only of the same type of lens 30. In this case, the emitted light from each LED 2 is uniformly refracted by each lens 30 of the lens unit 3, so that the illuminance at the central part is the highest from the lens unit 3, and the illuminance gradually increases toward the peripheral part. Is obtained, but the decrease in the illuminance at the periphery is small. That is, the emitted light is also bright to some extent at the peripheral part.

  In the example shown in FIG. 7B, as in the case of FIG. 7A, since the lens unit 3 is composed of only the same type of lens 30 ′, the emitted light from each LED 2 is emitted from each lens of the lens unit 3. The lens unit 3 receives the refracting action evenly, and the lens unit 3 has the highest illuminance at the central portion, and the emitted light L whose illuminance gradually decreases toward the peripheral portion is obtained. Since the focusing action of 30 ′ is stronger than that of the lens 30, the illuminance at the center is higher than in the case of FIG. Moreover, the fall of the illumination intensity of a peripheral part is more remarkable than the case of Fig.7 (a).

  In the example shown in FIG. 7C, in the example shown in FIG. 7A, the lens 30 of the lens unit 3 arranged at the center is replaced with a lens 30 '. In this case, outgoing light having the advantages of both FIGS. 7A and 7B is obtained. That is, the emitted light L is subjected to different refracting actions by the lenses 30 and 30 ′, so that the illuminance at the central portion is high and the illuminance at the peripheral portion is also high to some extent.

  In the example shown in FIG. 7D, in the example shown in FIG. 7A, the plurality of lenses 30 of the lens unit 3 arranged on one end side are replaced with a plurality of lenses 30 '. In this case, a region with high illuminance has moved to one peripheral side.

  In the example shown in FIG. 7E, a plurality of lenses 30 'are provided only on one end side. In this case, a region with high illuminance is arranged on one peripheral side, but the peak value of illuminance is lower and the illuminance at the peripheral portion is lower than in the case of FIG.

  In this way, by preparing a lens unit including lenses having different refractive actions and replacing part or all of the original lens unit, the optical member having a different light distribution characteristic is changed. The light distribution characteristics of the lighting device can be easily changed.

  In the above embodiment, the case where the distance between the LED 2 and the lens unit 3 is constant has been described as an example, but the application of the present invention is not limited to this.

  8 to 10 show a distance variable mechanism for making the distance between the LED 2 and the lens unit 3 variable. In the above-described embodiment, an example in which a plurality of lens units 3 each having two lenses 30 are arranged in the longitudinal direction is shown. However, here, the lens unit 3 is composed of a single member extending in the longitudinal direction. . That is, in this case, the lens unit 3 includes a belt-like bottom plate portion 31 extending in the longitudinal direction and a plurality of convex lenses 30 disposed on the bottom plate portion 31 at predetermined intervals.

  In the example shown in FIG. 8, the actuator (distance variable mechanism) 4 is provided below the bottom plate portion 31 at both longitudinal ends of the bottom plate portion 31. The actuator 4 is disposed at a substantially central position in the width direction at the longitudinal end portion of the bottom plate portion 31. The tip of the plunger 4 a of the actuator 4 is in contact with the lower surface of the bottom plate portion 31. For example, a solenoid or a cylinder is used as the actuator 4.

  In the example shown in FIG. 9, actuators 4, 4 ′ (distance variable mechanism) are provided below the bottom plate portion 31 at both longitudinal ends of the bottom plate portion 31. The actuators 4, 4 ′ are arranged at the end portions in the width direction at the end portions in the longitudinal direction of the bottom plate portion 31 with a space therebetween. The distal ends of the actuator plungers 4 a and 4 ′ a are in contact with the lower surface of the bottom plate portion 31. Similarly, for example, a solenoid or a cylinder is used as the actuator 4 '.

  In the example shown in FIG. 10, stepping motors or servo motors 40 are provided below the bottom plate portion 31 at both longitudinal ends of the bottom plate portion 31. A pinion 41 is attached to the output shaft of the stepping motor 40. Further, a rack 42 extending in the vertical direction is disposed on the side of the pinion 41, and the upper end of the rack 42 is fixed to the lower surface of the bottom plate portion 31. The rack teeth of the rack 42 mesh with the teeth of the pinion 41. In this case, the motor 40, the pinion 41, and the rack 42 constitute a distance variable mechanism. A guide 43 that guides the vertical movement of the rack 42 is provided on the side of the rack 42.

  8 and 9, the actuator 4 (and 4 ') is driven to change the protruding amount of the plunger 4a (and 4'a). In the example of FIG. 10, the motor 40 is driven. As the rack 42 is moved up and down, the distance of the bottom plate portion 31 from the LED 2 changes (see the dashed line in FIGS. 8 to 10). As a result, as shown in the upper diagram of FIG. 11A, the lens 30 is connected to the LED 2 as shown in the upper diagram of FIG. In the case where they are arranged away from each other, the way in which the light emitted from the LEDs 2 is focused by the lens 30 changes, and the way in which the emitted light L from each lens 30 is focused changes. As shown in the lower diagram, the illuminance of the emitted light L changes.

  Thus, the light distribution characteristics of the LED lighting device can be easily changed by changing the distance between the LED 2 and the lens unit 3 using the variable distance mechanism.

  In the above embodiment and the examples of FIGS. 8 to 10, the example in which the lens unit 3 is moved in parallel with the LED 2 has been shown, but the application of the present invention is not limited to this.

  12 to 15 show a tilting mechanism that tilts the lens unit 3 with respect to the optical axis of the LED 2. Also in this case, as in the example of FIGS. 8 to 10, the lens unit 3 includes a belt-like bottom plate portion 31 extending in the longitudinal direction, and a plurality of convex lenses 30 disposed thereon at predetermined intervals. It is composed of

In the example of FIG. 12, one end in the width direction of the bottom plate portion 31 is supported by the hinge 50, and the bottom plate portion 31 is rotatable around the hinge 50. The actuator 5 is provided below the other end in the width direction of the bottom plate portion 31, and the tip of the plunger 5 a of the actuator 5 is in contact with the lower surface of the bottom plate portion 31. In FIG. 12, the alternate long and short dash line A x indicates the optical axis of the LED 2, and the alternate long and short dash line L x indicates the optical axis of the lens 30. 12A, the optical axis L x of the lens 30 coincides with the optical axis A x of the LED 2, and in FIG. 12B, the optical axis L x of the lens 30 is relative to the optical axis A x of the LED 2. Is inclined.

  In the example of FIG. 13, the actuator provided below the bottom plate portion 31 is composed of a hinge type solenoid 5 ′. A fixed plate 51 extending above the solenoid 5 'is fixed to the solenoid 5'. The tip of the armature 5 ′ a of the solenoid 5 ′ is in contact with the movable plate 52, and one end of the movable plate 52 is hinged to the fixed plate 51. The movable plate 52 is fixed to the lower surface of the bottom plate portion 31.

  In the example of FIG. 14, a stepping motor or servomotor 50 is provided below the bottom plate portion 31, and a worm 51 is attached to the output shaft of the motor 50. On the other hand, a part of a worm wheel 52 that meshes with the worm 51 is fixed to the lower surface of the bottom plate portion 31.

In the example of FIG. 15, actuators (inclination mechanisms) 5 1 and 5 2 are provided below the bottom plate portion 31 at both longitudinal ends of the bottom plate portion 31. The actuator 5 1 is disposed on one end in the longitudinal direction of the bottom plate portion 31, the actuator 5 2 are arranged in the other longitudinal end of the bottom plate portion 31. The tips of the plungers 5 1 a and 5 2 a of the actuators 5 1 and 5 2 are in contact with the lower surface of the bottom plate portion 31. For example, a solenoid or a cylinder is used as the actuator 4. This example is similar to the example of FIG. 8 described above, but in the example of FIG. 8, the protruding amount of the plunger 4a of each actuator 4 at both ends in the longitudinal direction of the bottom plate portion 31 is the same, and the bottom plate portion 31 is replaced with the LED 2. 15, in the example of FIG. 15, the protruding amounts of the plungers 5 1 a and 5 2 a of the actuators 5 1 and 5 2 at both ends in the longitudinal direction of the bottom plate portion 31 are made different. Thus, the bottom plate portion 31 is inclined in the longitudinal direction with respect to the optical axis of the LED 2.

In the example of FIG. 12, the actuator 5 is driven to project the plunger 5 a, whereby the bottom plate portion 31 rotates around the hinge 50, and the optical axis L X of the lens 30 together with the bottom plate portion 31 is the light of the LED 2. inclined relative to the axis A x (see FIG. (b)). In the example of FIG. 13, by driving the solenoid 5 ′ to project the armature 5′a, the movable plate 52 rotates around the fixed plate 51, so that the bottom plate portion 31 (and therefore the optical axis of the lens 30). There inclined relative LED2 of the optical axis a x (see FIG. (b)). In the example of FIG. 14, by driving the motor 50 and rotating the worm 51, the worm wheel 52 that meshes with the worm 51 rotates, the bottom plate portion 31 rotates, and the bottom plate portion 31 (and thus the light of the lens 30). axis) is inclined with respect LED2 of the optical axis a x (see chain line drawing).

According to the example of FIGS. 12 and 13, since the lens unit 3 lens 30 is attached is inclined with respect LED2 of the optical axis A x (see FIG. 12 (b) and FIG. 13 (b)), FIG. 16 as shown in, when the LED illumination apparatus 1 is attached to the mounting surface 100, the irradiation light L from the LED illumination device 1 is irradiated, it deviated from the position directly in front of the LED lighting device 1, for example, a region T 1 It is possible to change the light distribution characteristics of the irradiation light. Further, according to the example of FIG. 14, by changing the rotation direction of the motor 50, and the bottom plate portion 31 is swung, since the lens unit 3 is also inclined on either side with respect to LED2 of the optical axis A x When the LED illumination device 1 is attached to the attachment surface 100 (see FIG. 14, the dashed line), the irradiation light L from the LED illumination device 1 is a region T 1 deviated from the position in front of the LED illumination device 1 and It can be irradiated both T 2, can change the light distribution characteristic of the illumination light.

Figure in the example 15, to be larger than the amount of projection of one of the actuators 5 1 of the plunger 5 1 a other actuator 5 2 plungers 5 2 a projection amount of the bottom plate portion 31 is LED2 of the optical axis A It is inclined in the longitudinal direction with respect to x (see the figure). 12 to 14 show an example in which the bottom plate portion 31 is inclined by making the height of one end in the width direction of the bottom plate portion 31 higher than the height of the other end. However, in FIG. By making the height of one end in the longitudinal direction of the portion 31 higher than the height of the other end, the bottom plate portion 31 is inclined.

According to the example of FIG. 15, the lens 30 is arranged on the side of the actuator 5 1, for example, the outgoing light as shown in the upper diagram shown in FIG. 11 (b) is focused, as shown in FIG. In FIG lower illuminance is obtained, the lens 30 is arranged on the side of the actuator 5 2, and the emitted light as shown in the upper diagram of FIG. (a) is focused, the illumination as shown in FIG. in FIG lower side to give Will be. In this way, the light distribution characteristic of the irradiation light can be changed.

  In the example of FIGS. 12 to 15, the case where the bottom plate portion 31 can take both the inclined position and the non-inclined position is shown, but the application of the present invention is not limited to this.

  FIG. 17 shows another example of the tilt mechanism. As shown in the figure, the lens unit 3 has a single lens 30, and the lens 30 is attached to an inclined bottom plate portion 31 ′. The inclined bottom plate portion 31 ′ is inclined with respect to the mounting surface 33 at the bottom of the lens unit 3, and the height gradually increases from the front side to the back side in FIG. 17.

  FIGS. 18A to 18D show states in which the lens unit 3 is arranged in various directions within the plane including the mounting surface 33. The lens unit 3 is rotated approximately 90 degrees counterclockwise as it proceeds from the state shown in FIG. 5A to the states (b) → (c) → (d). Thereby, as shown in each figure, the optical axes X of the lenses 30 are arranged in different directions.

In this case, since each lens unit 3 can be inclined with respect to LED2 of the optical axis A x, can be changed light distribution characteristics of light emitted from the LED lighting device 1. In addition, in this case, it is only necessary to change the way in which the lens unit 3 is placed inside the housing 10 without requiring a separate drive mechanism, so that the manufacturing cost can be reduced. Furthermore, in this case, the lens unit 3 can be inclined in various directions only by changing the way the lens unit 3 is placed.

  19 and 19A show other examples of the distance variable mechanism and the tilt mechanism. As shown in FIG. 19, the lens unit 3 ′ has a single lens 30 on the bottom plate portion 31, and, for example, four leg portions 35 that extend downward on the lower surface of the bottom plate portion 31. Is provided. The leg portion 35 is composed of a large diameter portion 35a, an intermediate diameter portion 35b, and a small diameter portion 35c in order from the top. The intermediate diameter part 35b has an intermediate diameter between the large diameter part 35a and the small diameter part 35c. Here, the case where the leg portion 35 has a columnar shape with a stepped portion is shown, but the leg portion 35 may have any other shape. In order from the top, a large portion 35a, an intermediate portion 35b, and a small portion 35c are provided. The intermediate diameter portion 35b may be omitted, or a plurality of intermediate diameter portions having stepped portions may be provided.

  On the other hand, a locking hole 20 into which the leg portion 35 of the lens unit 3 ′ is inserted and locked is formed inside the housing 10 to which the lens unit 3 ′ is attached. For example, as shown in FIG. 19A, the locking holes 20 are arranged between four locking holes 20 b having intermediate diameters corresponding to the intermediate diameter parts 35 b of the leg portions 35, and each of the leg portions 35. There are four small-diameter locking holes 20c corresponding to the small-diameter portion 35c. Each locking hole 20b is disposed at a position corresponding to the four corners of the square. Similarly, each locking hole 20c is also disposed at a position corresponding to the four corners of the square. The centers of both squares coincide with each other, and the respective locking holes 20b and 20c are arranged at positions rotated 90 degrees around the square center. A plurality of such combinations of the locking holes 20 b and 20 c are provided inside the housing 10.

FIG. 20 shows an example of various installation methods of the lens unit 3 ′.
In FIG. 5A, each small diameter portion 35c of each leg portion 35 of the lens unit 3 ′ is inserted and locked in the four small diameter locking holes 20c on the housing 10 side. At this time, the height position of each leg portion 35 is determined by the position of the stepped portion of the intermediate portion 35b. In this case, the lens unit 3 ′ is disposed at a position farthest from the LED (not shown), and the optical axis of the lens 30 coincides with the optical axis of the LED.

  In FIG. 20B, each intermediate diameter portion 35b of each leg portion 35 of the lens unit 3 'is inserted and locked into four locking holes 20b having an intermediate diameter on the housing 10 side. At this time, the height position of each leg portion 35 is determined by the position of the stepped portion of the large diameter portion 35a. In this case, the lens unit 3 ′ is disposed at a position closest to the LED, and the optical axis of the lens 30 coincides with the optical axis of the LED.

  20C, in FIG. 19A, two adjacent locking holes 20b are replaced with locking holes 20c, respectively. The intermediate diameter portions 35b of the two leg portions 35 of the lens unit 3 ′ are inserted and locked in the locking holes 20b, respectively, and the small diameter portions 35c of the remaining leg portions 35 of the lens unit 3 ′ are respectively locked. It is inserted into 20c and locked. At this time, the height position of each leg portion 35 on the left side in the drawing is determined by the position of the stepped portion of the large diameter portion 35a, and the height position of each leg portion 35 on the right side in the drawing is set on the stepped portion of the intermediate diameter portion 35b. It is decided by the position of the part. In this case, the bottom plate portion 31 of the lens unit 3 ′ is disposed so as to be inclined, and the optical axis of the lens 30 of the lens unit 3 ′ is inclined with respect to the optical axis of the LED.

  In addition, instead of a combination of a plurality of types of locking holes 20 having different diameters as shown in FIG. 19A, the inner wall of the locking hole 20 is made elastic, and according to the magnitude of the pushing force of the leg 35, The locking hole 20 may be configured to change from the locking hole 20c having a small diameter to the locking hole 20b having a large diameter.

  In this case, by appropriately selecting the size and position of the locking holes 20 for inserting and locking the respective leg portions 35 of the lens unit 3 ′ and providing the locking holes 20, the lens 30 of the lens unit 3 ′ and The distance to the LED can be changed, and furthermore, the lens 20 can be arranged to be inclined with respect to the optical axis of the LED, thereby simplifying the light distribution characteristics of the emitted light from the lens unit 3 ′. You can change it.

  FIG. 21 shows a lens unit according to another embodiment of the present invention. As shown in the figure, this lens unit 3 ″ has a projection 36 and a locking hole 37 on the side surface and end surface of the side plate portion 32. The locking hole 37 is sized to fit the projection 36. The protrusions 36 and the locking holes 37 provided on the side surface and the end surface of the one side plate portion 32 are point-symmetric with respect to the protrusions 36 and the locking holes 37 provided on the side surface and the end surface of the other side plate portion 32. It is arranged at the position.

  In this case, as shown in FIG. 22, a plurality of lens units 3 ″ can be linearly connected to each other using the projections 36 and the locking holes 37 of the lens unit 3 ″. As a result, the entire lens unit group is fixed inside the casing only by fixing the lens units 3 ″ at both ends of the lens unit group connected in a straight line to the inside of the casing using the installation screws 6 and 7 or the like. This can improve the assembly of the device.

  Further, although not shown, the lens unit 3 ″ shown in FIG. 22 can be connected in a planar shape. In this case, the LED lighting device having an arbitrary shape such as a square shape or a rectangular shape when viewed from the front. Can be configured.

  In addition, as an optical member by this invention, a total reflection mirror, a half mirror, a light guide, etc. other than the lens mentioned above, or these combinations may be sufficient. In each of the above embodiments, a refracting lens is shown, but the present invention can also be applied to a lens using a diffractive lens.

1 is a front view of an LED lighting device employing a light distribution structure according to an embodiment of the present invention. It is a side view of FIG. It is the III-III sectional view taken on the line of FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is a whole perspective view of the lens unit which comprises the light distribution structure by a present Example. The modification of a lens unit is shown. (A) is a front view of a lens unit (FIG. 5), (b) is a side view, and (c) is an end view. It is a figure for demonstrating the light distribution characteristic of the emitted light by various lens units. The example of the distance variable mechanism for making the distance of LED and a lens unit variable is shown. The other example of the distance variable mechanism for making the distance of LED and a lens unit variable is shown. The other example of the distance variable mechanism for making the distance of LED and a lens unit variable is shown. It is a figure for demonstrating the effect of each example shown in FIG. 8 thru | or FIG. The example of the inclination mechanism which inclines a lens unit with respect to the optical axis of LED is shown. The other example of the inclination mechanism which inclines a lens unit with respect to the optical axis of LED is shown. The other example of the inclination mechanism which inclines a lens unit with respect to the optical axis of LED is shown. The other example of the inclination mechanism which inclines a lens unit with respect to the optical axis of LED is shown. It is a figure for demonstrating the irradiation area | region by the LED lighting apparatus (FIGS. 12-14) provided with the inclination mechanism. It is a whole perspective view of a lens unit provided with other inclination mechanisms. (A)-(d) has shown the state which has arrange | positioned the said lens unit (FIG. 17) in various directions. It is a whole perspective view of a lens unit provided with other distance variable mechanisms and tilt mechanisms. It is a figure which shows an example of the latching hole inside the housing | casing in which the leg part of a lens unit is latched. (A)-(c) has shown an example of the installation method of the said lens unit (FIG. 19). It is a whole perspective view of the lens unit by another Example of this invention. It is a figure for demonstrating the effect of the said lens unit (FIG. 21).

Explanation of symbols

1: LED lighting device

2: LED (light emitting diode)
20: Locking hole (distance variable mechanism, tilt mechanism)

3, 3 ′, 3 ″: Lens unit (light distribution characteristic changing means)
30, 30 ': Lens (optical member)
31 ': Inclined bottom plate part (inclination mechanism)
35: Leg (variable distance mechanism, tilt mechanism)
36: Protrusion (fitting part)
37: Locking hole (fitting part)

4, 4 ': Actuator (Distance variable mechanism)
40: Motor (variable distance mechanism)
41: Pinion (variable distance mechanism)
42: Rack (variable distance mechanism)

5: Actuator (tilting mechanism)
5 ': Hinge type solenoid (tilting mechanism)
50: Motor (tilting mechanism)
51: Worm (tilting mechanism)
52: Worm wheel (tilting mechanism)
5 1 : Actuator (tilting mechanism)
5 2 : Actuator (tilting mechanism)

Claims (5)

  1. In the light distribution structure of the LED lighting device,
    A light source comprising at least one light emitting diode (LED);
    Light distribution characteristic changing means for changing light distribution characteristics of light emitted from the light source, having at least one or more optical members disposed on the light emitting diodes corresponding to the light emitting diodes;
    A light distribution structure of an LED lighting device comprising:
  2. In claim 1,
    The optical member can be changed to an optical member having a different light distribution characteristic.
    A light distribution structure of an LED lighting device.
  3. In claim 1,
    The light distribution characteristic changing means has a variable distance mechanism for changing a distance between the optical member and the light emitting diode.
    A light distribution structure of an LED lighting device.
  4. In claim 1,
    The light distribution characteristic changing means has an inclination mechanism for inclining the optical member such that the optical member is inclined with respect to the optical axis of the light emitting diode.
    A light distribution structure of an LED lighting device.
  5. In claim 1,
    Each of the optical members has a fitting portion for connecting to each other.
    A light distribution structure of an LED lighting device.
JP2008261149A 2008-10-07 2008-10-07 LED lighting apparatus and light distribution characteristic changing method thereof Active JP4883648B2 (en)

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Application Number Priority Date Filing Date Title
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JP2010092700A5 JP2010092700A5 (en) 2011-03-17
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011254079A (en) * 2010-06-01 2011-12-15 Lg Innotek Co Ltd Light-emitting element package and illumination system
WO2012096204A1 (en) * 2011-01-12 2012-07-19 シャープ株式会社 Illumination device and display device
JP2013206589A (en) * 2012-03-27 2013-10-07 Micro Control Systems Kk Chassis for lighting device having lid body fixed by pressing and lid body fixing method
JP2016149264A (en) * 2015-02-12 2016-08-18 パナソニックIpマネジメント株式会社 Luminaire, illumination system and mobile body
JP2018036617A (en) * 2016-08-29 2018-03-08 浚洸光學科技股▲ふん▼有限公司 Optical lens assembly and illumination device having the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007048883A (en) * 2005-08-09 2007-02-22 Koha Co Ltd Optical element for changing direction of light, light source unit for radiating light, and planar light emitting device employing it
JP2008130823A (en) * 2006-11-21 2008-06-05 Sanyo Electric Co Ltd Lighting device, and electronic equipment with it

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007048883A (en) * 2005-08-09 2007-02-22 Koha Co Ltd Optical element for changing direction of light, light source unit for radiating light, and planar light emitting device employing it
JP2008130823A (en) * 2006-11-21 2008-06-05 Sanyo Electric Co Ltd Lighting device, and electronic equipment with it

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011254079A (en) * 2010-06-01 2011-12-15 Lg Innotek Co Ltd Light-emitting element package and illumination system
WO2012096204A1 (en) * 2011-01-12 2012-07-19 シャープ株式会社 Illumination device and display device
JP2013206589A (en) * 2012-03-27 2013-10-07 Micro Control Systems Kk Chassis for lighting device having lid body fixed by pressing and lid body fixing method
JP2016149264A (en) * 2015-02-12 2016-08-18 パナソニックIpマネジメント株式会社 Luminaire, illumination system and mobile body
JP2018036617A (en) * 2016-08-29 2018-03-08 浚洸光學科技股▲ふん▼有限公司 Optical lens assembly and illumination device having the same
US10240755B2 (en) 2016-08-29 2019-03-26 Chun Kuang Optics Corp. Optical lens assembly and illumination device comprising the same

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