JP2008047541A - Lighting device - Google Patents

Abstract

An illumination device is provided that can change a light distribution of light emitted from a light source unit without reducing light intensity.
A lighting device including a plurality of LED light-emitting elements, wherein the light source unit generates light emitted from a plurality of LED light-emitting elements, that is, a light emitted from a straight traveling direction and a slanted light emitting component inclined from the straight traveling direction. 200 and the light source unit 200 are accommodated therein and supported so as to be able to advance and retreat in the straight direction, and at least a reflection band having light reflectivity only with respect to the light emitted in the oblique direction is provided on the inner peripheral surface. And an annular support member 17 formed at the end of the emission side, and the light distribution of the light emitted from the light source unit 200 can be changed by changing the advance / retreat position of the light source unit 200 with respect to the annular support member 17.
[Selection] Figure 1

Description

  The present invention relates to an illuminating device suitable for use in a downlight, and more particularly to an illuminating device that generates light emitted from a plurality of LED light emitting elements into a straight traveling direction outgoing component and an oblique direction outgoing component.

  One of the lighting devices is a downlight that is embedded in the ceiling and illuminates directly underneath. There are various types of downlights. As an example, there is a downlight provided with a bowl-shaped reflecting mirror and a light source as main components. A cylindrical frame is concentrically inserted outside the reflecting mirror, and the frame has a flange portion at the lower end. A lamp socket is fixed to the top of the reflecting mirror, and the lamp socket is configured such that a one-piece light source can be screwed to a mounting portion that opens downward. A translucent plate is horizontally attached to the lower opening surface of the frame (see, for example, Patent Document 1).

  By the way, for example, in stores such as stores that display products, in order to illuminate the display / exhibitions in art galleries and museums, the side wall surface is illuminated from the upper side (ceiling surface side) to the lower side (floor surface side). Lighting devices that also illuminate exhibits have been proposed. This type of illumination device provides spot illumination for illuminating a display / exhibit and indirect illumination (so-called wall washer) for illuminating a side wall surface. While a wall washer needs to be able to illuminate a relatively wide range, spot illumination is required to illuminate a limited area with sufficient illuminance. As described above, the required illumination range differs between wall washer and spot lighting. Conventionally, the light for wall washer and the light for spot illumination are generated from the light emitted from a single light source (or light source of a single block). It was.

JP 2006-12749 A

However, the conventional illumination device that generates each of the light for wall washer and the light for spot illumination from a single light source (or a single block light source) has the following disadvantages. For example, in order to avoid interference with equipment in a ceiling pocket or interference with a beam or the like that is a building frame, it may be necessary to install at different distances from the side wall surface. At this time, in the conventional lighting device, the illuminance of the spot lighting is the same, but the distance between the lighting device and the side wall surface is different, so the top position of the wall washer lighting area is shifted, and the appearance of the lighting effect is significantly reduced. There was something to do. On the other hand, a light-transmitting cover having a lens region and a light diffusion region is provided on the light emitting side of the lighting device, and the orientation is controlled by moving the light-transmitting cover close to and away from the light source. However, in order to control the distribution of the amount of light with the same light source, for example, if the wall washer is increased, the illuminance of the spot illumination is reduced. In addition, since the light emitted from the light source is transmitted through the light-transmitting cover, there is a problem that the light use efficiency is significantly reduced due to the aging of the light-transmitting cover and deterioration.
The present invention has been made in view of the above situation, and it is an object of the present invention to provide an illumination device that can change the light distribution of light emitted from the light source unit without reducing the light intensity.

The above object of the present invention is achieved by the following configuration.
(1) An illumination device including a plurality of LED light emitting elements,
A light source unit that generates light emitted from the plurality of LED light emitting elements, and a light emitted from a straight traveling direction outgoing component and an oblique outgoing component inclined from the straight traveling direction;
The light source unit is housed inside and supported so as to be able to advance and retreat in the straight direction, and at least a reflection band having light reflectivity only with respect to the light emitted in the oblique direction is provided on the inner peripheral surface. An annular support member formed at the side end;
A lighting device comprising:

  According to this illuminating device, the position of the light source unit relative to the annular support member is displaced by moving the inner light source unit forward and backward with respect to the outer annular support member, and the oblique emission component reflected by the reflection band Therefore, the light distribution of the light emitted from the light source unit can be freely varied without reducing the light intensity of the component emitted in the straight traveling direction.

(2) The lighting device according to (1),
By inserting the light source unit from the light emission side of the annular support member into the annular support member, the inclination angle of the reflected light component from the reflection band with respect to the oblique direction emission component with respect to the straight traveling direction is reduced,
An illumination device that increases an inclination angle of the reflected light component from the reflection band with respect to the straight traveling direction by pulling out the light source unit from the inside of the annular support member to the light emitting side.

  According to this illumination device, the light source unit is inserted into the annular support member, whereby the distance between the light source unit and the light emission side end of the annular support member is increased, and the light source unit tends to spread radially from the light source unit. The light beam is reflected inward by the reflection band at the light emitting side end, and as a result, the inclination angle with respect to the straight traveling direction is reduced. In addition, since the light source unit is pulled out from the inside of the annular support member, the distance between the light source unit and the light emission side end of the annular support member is shortened, and the light flux that attempts to spread radially from the light source unit is emitted from the light emission side end. As a result, the angle of inclination with respect to the straight traveling direction increases.

(3) The illumination device according to (1) or (2),
The light source unit is fixed to the inner peripheral side, and includes a fixing ring in which a plurality of locking claws protrude from the outer peripheral side.
The said annular support member is an illuminating device by which the latching | locking part engaged with the side surface of this cyclic | annular support member corresponding to the said latching claw was formed in the several position along the said rectilinear advance direction.

  According to this lighting device, the locking claw of the fixing ring is attached to the fixing ring by being engaged with a plurality of arbitrary locking portions arranged on the annular support member along the straight traveling direction. The light source unit is positioned and fixed at a desired advance / retreat position with respect to the annular support member.

(4) The illumination device according to (3),
The lighting device in which at least one of the locking claws of the fixing ring is engaged with the locking portion of the annular support member at a position in the straight direction different from the other locking claws.

  According to this lighting device, the light source unit is inclined and supported from the axial direction of the annular support member by engaging any one of the locking claws with the locking portions having different height positions, and the light emission direction Can be easily tilted.

(5) The illumination device according to any one of (1) to (4),
A plurality of first LED light emitting elements that emit light of the light component emitted in the straight direction, and a plurality of second LED light emitting elements that are arranged in an annular shape surrounding the first LED light emitting element and emit light of the oblique light emitting component. A lighting device having an element.

  According to this illuminating device, the light source unit emits light of a component that travels in the straight direction, and the first LED light emitting element in the central region, and the second LED light emission that surrounds the first LED light emitting element and emits light of the oblique direction emitting component. While the light emitted from the straight traveling direction component is kept at a constant intensity in the central region, the second LED light emitting device in the annular region is advanced and retracted, so that the oblique angle of only the oblique direction emitting component can be easily adjusted. It becomes possible.

(6) The lighting device according to (5),
A lighting device in which a first drive circuit that drives the plurality of first LED light-emitting elements and a second drive circuit that drives the plurality of second LED light-emitting elements are provided so as to be capable of independently controlling emission luminance.

  According to this illuminating device, the light in the straight direction emission component emitted from the first LED light emitting element in the central region and the light in the oblique direction emission component emitted from the second LED light emitting device in the annular region are individually independent. Thus, the emission luminance is controlled, and the illuminance of each region is individually variable. This makes it easier to obtain a desired light distribution pattern.

(7) The illumination device according to (5) or (6),
An illumination device in which an isolation wall protruding in the straight direction is formed between the first LED light emitting element and the second LED light emitting element.

  According to this illuminating device, light from the second light emitting element disposed outside the isolation wall is reflected by the reflection band of the annular support member to generate light directed in an oblique direction, and reflected by the isolation wall. The light is reflected again on the reflection band of the annular support member, or is emitted in the oblique direction with a large inclination angle and is directly emitted to the outside, so that the light use efficiency of the oblique direction emission component is enhanced.

(8) The illumination device according to (7),
An illuminating device provided with a reflective diffusion cover for preventing light from the second LED light emitting element from being directly emitted from the light source unit between the isolation wall and the reflection band of the annular support member.

  According to this illumination device, when the light from each light emitting element of the second LED light emitting element is reflected or diffused by the reflection diffusion cover, the light from each LED light emitting element is not directly emitted, and the illumination device is viewed from an oblique direction. In addition, the light source itself is not dazzling.

(9) The illumination device according to any one of (1) to (7),
The illumination device including an inclined region in which the reflection band is inclined toward the light source unit on a light emission side of the annular support member.

  According to this illuminating device, it is possible to increase the inclination angle of the light emitted from the second LED light emitting element by inclining the light emission side of the reflection band inward. That is, the light emitted downward from the second LED light emitting element is reflected by the reflection band of the inclined area inclined inward downward, so that it is closer to the horizontal direction than reflected by the vertical reflection band. The inclination angle can be increased.

(10) The lighting device according to (9),
An illuminating device provided with a plurality of reflecting flaps supported in a tiltable manner toward the light source unit on a light emitting side of the reflection band of the annular support member.

  According to this lighting device, the spread of light in the horizontal direction can be freely controlled at an arbitrary position in the circumferential direction by changing the inclination of a plurality of flaps at arbitrary positions arranged in the circumferential direction. For example, the inclination angle of the oblique emission component can be reduced in a part of the circumferential direction, and the inclination angle of the oblique emission component can be increased in another part of the circumferential direction.

(11) The illumination device according to any one of (1) to (10),
The lighting device in which the plurality of LED light emitting elements are respectively disposed on the same plane substrate.

  According to this illumination device, the plurality of LED light emitting elements are arranged on the same plane substrate, so that the optical axes can be easily aligned and the assemblability is improved. Also, the wiring is simplified.

(12) The illumination device according to any one of (4) to (10),
Each light emitting element of the second LED light emitting element is mounted on an annular substrate disposed around a central substrate on which each light emitting element of the first LED light emitting element is mounted, and the annular substrate goes straight with respect to the central substrate. An illuminating device supported so as to freely move in and out of the direction.

  According to this illumination device, while the first LED light emitting element is fixed, only the second LED light emitting element has a movable structure, the structure is simplified, and the fine adjustment of the tilt angle with respect to the oblique emission component is facilitated.

(13) The illumination device according to any one of (1) to (3),
The lighting device includes a reflection member for generating an oblique emission component that receives and reflects or diffuses a part of the emission light from the plurality of LED light emitting elements to generate light of the oblique emission component.

  According to this illuminating device, it is possible to generate light of an oblique emission component with a simple structure by reflected light or diffused light from the reflection member for generating the oblique emission component without providing a dedicated LED light emitting element for the oblique emission component. Become.

(14) The illumination device according to any one of (1) to (13),
An illumination device in which a surface of the reflection band is a mirror surface.

  According to this illumination device, the light intensity from the second LED light emitting element is suppressed, and the light intensity of the oblique emission component is increased.

(15) The illumination device according to any one of (1) to (13),
An illumination device in which a surface of the reflection band is a light diffusion surface.

  According to this illuminating device, the light emitted from the second LED light emitting element is reflected by the reflection band that becomes the diffusion surface, the reflected light is uniformly dispersed, and the light in the oblique direction does not depend on the position of the light source. Isotropically emitted.

(16) The illumination device according to any one of (1) to (15),
The illumination device in which the reflection band is formed only in a partial region with respect to the entire circumference of the annular support member.

  According to this illuminating device, the oblique light component is generated in the portion where the reflection band exists, and the oblique light component is not generated in the portion where the reflection band does not exist, so that the light emission distribution can be an arbitrary distribution in a plane. That is, it is possible to form a light distribution pattern with a higher degree of freedom, such as illuminating only in a specific direction to an oblique direction and illuminating only in the other direction downward.

(17) The illumination device according to any one of (1) to (16),
The light source unit has a reflecting mirror member in which the LED light emitting elements are respectively disposed at the bottom position opposite to the large diameter side of the plurality of concave curved reflecting portions;
The light emitting side end of the reflecting mirror member is formed to be inclined from the outermost edge side of the arrangement region of the concave curved reflecting portion toward the central portion of the reflecting mirror member, and the concave curved reflecting portion of the concave curved reflecting portion is formed. An illumination device in which a light emitting side inner peripheral surface is formed including a light diffusing surface, and diffusely reflected light from the light diffusing surface generates the oblique emission component.

  According to this illuminating device, the light emission side end portion (that is, the reflection surface) of the reflecting mirror member is formed into a concave curved surface, and the light emission side inner periphery of the concave curved reflection portion provided in a plurality of radial shapes on the concave curved surface. A surface is disposed, and the inner peripheral surface portion on the radially outer side of the light emitting side inner peripheral surface acts as a light diffusing surface that generates light of the oblique emission component. As a result, the oblique emission component can be easily generated by simply opening the plurality of concave curved reflecting portions on the concave curved surface of the reflecting mirror member and providing the light diffusion surface on the inner peripheral surface of the light emission side.

(18) The illumination device according to (17),
An illumination device in which the optical axis length of the peripheral portion is made longer than the length of the central portion of the reflecting mirror member in the optical axis direction, and the light emitting side end of the reflecting mirror member is formed in a concave shape.

  According to this illuminating device, the concave surface reflecting portion having a long optical axis length in the peripheral portion can extend the reaching distance of the outgoing light and increase the outgoing component in the straight direction, and the optical axis length in the central portion is short. In the concave curved reflecting portion, the oblique direction outgoing component can be increased, and as a result, the separation between the straight traveling direction outgoing component and the oblique direction outgoing component can be improved.

(19) The illumination device according to (17),
The length of the concave curved reflecting portion in the optical axis direction is made longer than the length in the optical axis direction of the peripheral portion of the reflecting mirror member, and the light emitting side end portion of the reflecting mirror member is projected. Lighting device formed into a shape.

  According to this illuminating device, it is possible to increase the oblique emission component in the concave curved reflection portion having a short optical axis length in the peripheral portion, and reach of the outgoing light in the concave curved reflection portion having a long optical axis length in the central portion. It is possible to increase the distance and increase the straight direction emission component. As a result, it is possible to improve the separation between the straight direction emission component and the oblique direction emission component. Further, the light emitting side end portion of the reflecting mirror member protruding in a convex shape can be viewed from obliquely below, and the lighting device can be easily checked for lighting.

(20) The illumination device according to any one of (17) to (19),
The concave curved reflecting portion is formed including a parabolic surface,
The illuminating device in which the plurality of LED light emitting elements are arranged at a paraboloid focal position of the concave curved reflecting portion.

  According to this illuminating device, by arranging the LED light emitting element at the paraboloid focal position, the emitted light can be collimated and the reach of the emitted light can be extended.

(21) The illumination device according to any one of (17) to (19),
The concave curved reflection part is formed including a spheroid curved surface;
The illumination device in which the plurality of LED light emitting elements are arranged at one focal position of the spheroid curved surface.

  According to this illuminating device, by disposing the LED light emitting element at one focal position of the spheroidal curved surface, the degree of dispersion of the emitted light can be easily controlled by appropriately changing the other focal position. . That is, desired light dispersion control can be performed by arbitrarily designing the two focal lengths of the spheroid surface.

(22) The lighting device according to (20) or (21),
The concave curved reflecting portion of the reflecting mirror member is an illumination device in which a concave curved mirror formed with a paraboloid and a concave curved mirror formed with a spheroidal curved surface are mixedly arranged.

  According to this illuminating device, instead of adjusting the output of the LED light source, a variety of concave curved mirrors such as paraboloids and spheroid surfaces are arranged in a mixed manner to synthesize both illuminance distributions and obtain a desired illuminance pattern. be able to.

  According to the illuminating device of the present invention, the light source unit that generates the light emitted from the LED light emitting element in the straight direction emission component and the oblique direction emission component, and the light source unit are accommodated in the interior and supported so as to freely advance and retreat in the straight direction. In addition, since the inner peripheral surface is provided with an annular support member formed at least on the light emission side end portion of the light source unit, the reflection band having light reflectivity only with respect to the light emitted in the oblique direction is provided. By changing the advancing / retreating position with respect to the support member, the light distribution of the light emitted from the light source unit can be changed without reducing the light intensity of the component emitted in the straight traveling direction.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a lighting device according to the invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of the lighting device according to the present invention, FIG. 2 is a perspective view of the lighting device shown in FIG. 1 with a part cut away, and FIG. 3 is a bottom view of the light source unit.
The illuminating device 100 of this embodiment includes a plurality of LED light emitting elements 11, and generates light emitted from the LED light emitting elements 11 as a straight direction emission component and an oblique direction emission component inclined from the straight direction. It is a feature.

  The illuminating device 100 accommodates the light source unit 200 including the LED light-emitting element 11 and the light source unit 200 therein, and supports the illuminating device 100 so that the light source unit 200 can advance and retract in the straight direction that is the main optical axis direction of the illuminating device 100. A reflection band 15 having light reflectivity only with respect to light of an oblique emission component is provided on the surface, and an annular support member 17 formed at least on the light emission side end of the light source unit 200. In other words, the reflection band 15 is configured to reflect and reflect only the light emitted in the oblique direction without being irradiated with the light emitted in the straight direction.

  A fixing ring 19 is mounted on the outer periphery of the light source unit 200, and the fixing ring 19 projects a plurality of (three as an example in the illustrated example) locking claws 21 on the outer peripheral side. A guide groove 23 formed in a thin taper shape is provided on the inner surface of the annular support member 17, and the guide groove 23 guides the locking claw 21 inserted from below to a predetermined position above. A plurality of slit-like locking portions 25 that are long in the circumferential direction are formed above the guide groove 23 of the annular support member 17, and the locking portions 25 are formed at a plurality of positions along the above-described straight direction. Each of the locking portions 25 is an opening hole with which the locking claw 21 can be engaged.

  Therefore, as shown in FIG. 2, the locking claw 21 of the fixing ring 19 is fixed by being engaged with a plurality of arbitrary locking portions 25 arranged on the annular support member 17 along the straight traveling direction. The light source unit 200 attached to the ring 19 is positioned and fixed at a desired advance / retreat position with respect to the annular support member 17. A decorative flange 27 is fitted to the lower end of the annular support member 17 in which the light source unit 200 is fixed via a fixing ring 19 from below.

  As shown in FIG. 3, the light source unit 200 includes a plurality of first LED light emitting elements 11 a that emit light of the above-described straight-direction emission component, and an annular arrangement that surrounds the first LED light-emitting element 11 a and has the oblique emission component described above. And a plurality of second LED light emitting elements 11b that emit light of the same. The illumination device 100 includes a first LED light emitting element 11a in a central region in which the light source unit 200 emits light of a straight traveling direction emission component, and a second LED that surrounds the first LED light emitting element 11a and emits light of an oblique emission component. It is divided into the light emitting element 11b, and the light of the component emitted in the straight traveling direction is held at a constant intensity in the central area, while the second LED light emitting element 11b in the annular area is advanced and retracted with respect to the reflection band 15 of the annular support member 17. It is possible to adjust the oblique direction angle of only the oblique direction emission component.

  In the present embodiment, the plurality of LED light emitting elements 11 are respectively disposed on the same planar substrate 29. By arranging the plurality of LED light emitting elements 11 on the same plane substrate 29, the optical axis can be easily aligned and the assemblability is improved. In addition, the power supply wiring connected to each LED light emitting element 11 is also simplified by using, for example, a printed wiring.

FIG. 4 is a ray tracing diagram in which the light source unit insertion state is represented by (a) and the drawing state is represented by (b), and FIG. 5 shows the correlation between the position of the light source unit and the oblique emission component (a), (b), ( It is explanatory drawing represented by c).
As shown in FIG. 4A, the illumination device 100 inserts the light source unit 200 from the light emission side of the annular support member 17 into the annular support member 17, thereby causing the oblique emission component from the reflection band 15. The inclination angle of the reflected light component with respect to the straight traveling direction is reduced. On the other hand, as shown in FIG. 4B, the light source unit 200 is pulled out from the inside of the annular support member 17 to the light emitting side, thereby increasing the inclination angle of the reflected light component from the reflection band 15 with respect to the straight traveling direction.

  That is, as the light source unit 200 is inserted into the annular support member 17, the distance between the light source unit 200 and the light emission side end portion 17 a of the annular support member 17 is increased as shown in FIG. The light beam that is going to spread radially from the light source unit 200 is reflected inward by the reflection band 15 of the light emitting side end 17a, and as a result, the inclination angle with respect to the straight traveling direction is reduced. Further, as shown in FIG. 4B, the distance between the light source unit 200 and the light emitting side end portion 17a of the annular support member 17 is shortened by the light source unit 200 being pulled out from the inside of the annular support member 17. The light beam that is going to spread radially from the light source unit 200 is emitted without being blocked by the light emitting side end 17a, and as a result, the inclination angle with respect to the straight traveling direction increases.

  Thus, by gradually inserting the light source unit 200 from the front end side of the annular support member 17 to the back side, as shown in FIGS. 5A, 5B, and 5C, the oblique emission component The inclination angles φ1, φ2, and φ3 can be gradually decreased (φ1> φ2> φ3).

  In addition, an isolation wall 31 protruding in the straight direction is formed between the first LED light emitting element 11a and the second LED light emitting element 11b. A sub-reflection band 33 is formed on the outer peripheral surface of the isolation wall 31. Thereby, the light from the second LED light emitting element 11b arranged outside the isolation wall 31 is reflected by the reflection band 15 of the annular support member 17 to generate light directed in the oblique direction, and the sub-reflection of the isolation wall 31 is performed. The light reflected by the band 33 is reflected again by the reflection band 15 of the annular support member 17 or is emitted as an oblique component having a large inclination angle and is directly emitted outward, and the light use efficiency of the oblique component is increased. Enhanced. That is, by providing the isolation wall 31, the emission efficiency of the oblique emission component can be increased in cooperation with the reflection band 15.

FIG. 6 is a circuit diagram illustrating an example of a drive circuit of the light source unit.
In the illumination device 100 according to this embodiment, the first drive circuit 41a that drives the plurality of first LED light emitting elements 11a and the second drive circuit 41b that drives the plurality of second LED light emitting elements 11b can control the light amount. The control means (control unit) 43 is provided so that the light emission luminance can be controlled independently.

  The control unit 43 is connected to the DC power supply unit 50, and reads control data from an illumination pattern storage unit (not shown), whereby the first drive circuit 41a corresponding to each of the first LED light emitting element 11a and the second LED light emitting element 11b. Then, a drive control signal is sent to the second drive circuit 41b.

  The drive circuits 41 a and 41 b are configured as a constant current pulse width control drive circuit for the LED light emitting element 11. For example, in the drive circuit 41a, 45 and 47 are resistors, 49 and 51 are transistors, 53 is a Zener diode, and 55 is a pulse generation circuit.

  In the drive circuit 41a, constant current circuits 57a and 57b including resistors 45 and 47, a transistor 49, and a Zener diode 53 are connected in series to the LED light emitting element 11 in the DC power supply unit, and the LED light emitting element 11 emits light. . The base voltage of the transistor 49 is clamped to the Zener voltage of the Zener diode 53. When the Zener voltage is Vz and the base-emitter voltage of the transistor 51 is Vbe, the voltage of the resistor 45 is Vz−Vbe, and the current flowing through the resistor 45 is If the resistance value of the resistor 45 is R4, it is given by (Vz−Vbe) / R4. If the zener voltage Vz and the base-emitter voltage Vbe are constant, the current of the resistor 45 becomes (Vz−Vbe) / R4 and becomes constant. That is, even if the DC voltage V0 or the voltage drop of the LED light emitting element 11 changes, the collector-emitter voltage of the transistor 49 changes so that the current of the LED light emitting element 11 becomes constant.

  A transistor 51 is connected in parallel with the Zener diode 53, and a pulse generator 55 is connected to the base of the transistor 51. When the transistor 51 is turned on by the pulse voltage from the pulse generator 55, the Zener diode 53 is short-circuited, so that the base current of the transistor 49 becomes 0 and the transistor 49 is turned off. That is, since the current of the LED light emitting element 11 is cut off, it is turned off. When the pulse voltage from the pulse generator 55 disappears, the transistor 51 is turned off, so that a current flows through the base of the transistor 49, and the constant current circuit 57 supplies a constant current to the LED light emitting element 11. Light up. Here, the luminance of the LED light emitting element 11 is adjusted without changing the drive current by controlling the ratio of the time with and without the pulse voltage from the pulse generator 55, that is, by controlling the pulse width. can do.

  Since the voltage drop of the LED light emitting element 11 cannot be expected when the transistor 49 is turned off, the power supply voltage is applied to the transistor 49. When the power supply voltage is 140V, the withstand voltage of the transistor 49 needs to be 200V or more.

  In the illuminating device 100, the light of the straight direction emission component emitted from the first LED light emitting element 11a in the central region and the light of the oblique direction emission component emitted from the second LED light emitting device 11b in the annular region are individually independent. Thus, the luminance is controlled, and the illuminance adjustment of each region is individually variable. This makes it easier to obtain a desired light distribution pattern.

FIG. 7 is a perspective view showing a wall washer and spot illumination of the lighting apparatus shown in FIG. 1, and FIG. 8 is an explanatory view showing an adjustment example of the wall washer region.
As described above, in the lighting device 100 described above, by moving the inner light source unit 200 forward and backward with respect to the outer annular support member 17, the relative position of the light source unit 200 with respect to the annular support member 17 is displaced and reflected. The amount of reflected light of the oblique direction outgoing component reflected by the band 15 changes according to each reflection angle, and as a result, the irradiation region does not decrease the light intensity of the straight direction outgoing component in the irradiation region S1 shown in FIG. The light distribution of the light emitted from the light source unit 200 in S2, for example, the illumination start height H from the ceiling can be made variable.

  Thereby, when it is desired to set the irradiation area S2 of the side wall surface 61 at a distance H from the ceiling 63, the distance between the two illumination devices 100, 100 and the side wall surfaces 61a, 61b is different between La and Lb as shown in FIG. Even in the case (La ≠ Lb), the distances Ha and Hb of the irradiation area S2 from the ceiling 63 can be adjusted to be substantially equal (Ha≈Hb) by moving the second LED light emitting element 11b forward and backward.

Here, the 1st LED light emitting element 11a is explained in full detail.
In the illumination device 100, the concave curved surface reflecting portion 65 of the first LED light emitting element 11a is formed including a parabolic surface, and the plurality of first LED light emitting elements 11a are arranged at the paraboloid focal position of the concave curved surface reflecting portion 65. Can be configured. According to the concave curved surface reflection part 65 with such a paraboloid, by arranging the first LED light emitting element 11a at the paraboloid focal point position, the emitted light can be made parallel and the reach of the emitted light can be extended. it can.

FIG. 9 is an explanatory diagram showing illuminance distributions (a), (b), and (c) where the second focal points of the concave curved mirror made of an elliptical curved surface are different positions.
The illuminating device 100 can be configured such that the concave curved reflecting portion 65 is formed to include a spheroidal curved surface, and the plurality of first LED light emitting elements 11a are arranged at one focal position of the spheroidal curved surface. The spheroidal curved surface has two focal positions, one is set to the issue surface position of the first LED light emitting element 11 a, and the other focal position (second focal point) is arbitrarily set according to the shape of the concave curved reflector 65. be able to. Here, when the second focus is set in front of the irradiation surface (floor surface or the like), the reflected light from the first LED light emitting element 11a is once focused at the second focus as shown in FIG. 9A. Then, it spreads from the second focal point to the irradiation surface, and illumination light is obtained over a wide range on the irradiation surface. Further, when the second focal point is made coincident with the irradiation surface, a narrow range can be illuminated with high intensity as shown in FIG. 9B. Furthermore, when the second focus is set on the back side from the irradiation surface, as shown in FIG. 9C, illumination light is obtained in a state close to parallel light and has the same directivity as the paraboloid. Light is obtained.

  Thus, by disposing the first LED light emitting element 11a at one focal position of the spheroid surface, the degree of dispersion of the emitted light can be easily controlled by appropriately changing the other focal position. That is, desired light dispersion control can be performed by arbitrarily designing the two focal lengths of the spheroid surface.

  Further, the concave curved surface reflecting section 65 may be a mixture of concave curved mirrors formed with paraboloids and concave curved mirrors formed with spheroidal curved surfaces. By adopting such a mixed configuration, instead of adjusting the output of the LED light-emitting elements 11, parabolic and spheroidal curved concave mirrors are mixedly arranged at an appropriate ratio so that the light of the entire downlight can be obtained. It is possible to adjust the degree of diffusion of. As the mixed arrangement method, adjacent concave curved surface reflecting portions 65 can be set to different types, set to different types in the annular direction, or set to different types for each line extending radially from the center. It can also be arranged at random. By arranging various types in this way, it is possible to synthesize both illuminance distributions and obtain a desired illuminance pattern.

  Therefore, according to said illuminating device 100, the light source unit 200 which produces | generates the emitted light of a straight direction output component and a diagonal direction output component from the LED light emitting element 11, and the light source unit 200 are accommodated in an inside, and it advances / retreats in a straight direction. An annular support member 17 that is supported freely and has a reflection band 15 that is light-reflective only with respect to light emitted in an oblique direction on the inner peripheral surface is formed at least at the light emission side end of the light source unit 200. Therefore, by changing the advancing / retreating position of the light source unit 200 with respect to the annular support member 17, the light distribution of the light emitted from the light source unit 200 can be changed without reducing the light intensity of the component emitted in the straight traveling direction. Can do.

  In addition, the light emission color temperature of a 1st LED light emitting element and a 2nd LED light emitting element can be arbitrarily set in the range of 2000K-9500K. For example, if the light emitted from the first LED light emitting element has a color temperature of 5000K and the light emitted from the oblique direction emitted from the second LED light emitting element has a color temperature of 2800K, sufficient illuminance can be obtained as direct illumination, and the illumination on the wall surface It will be soft. In addition, various illumination patterns can be realized freely by combining the emission color temperatures of the first LED light emitting element and the second LED light emitting element so as to be different from each other and appropriately adjusting the light emission luminance.

Next, modified examples of the illumination device 100 according to the above-described embodiment will be described.
FIG. 10 is a ray tracing diagram showing an example of an illuminating device provided with different reflection diffusion covers by (a) and (b).
The illumination devices 100A and 100B reflect light from the second LED light emitting element 11b between the isolation wall 31 and the reflection band 15 of the annular support member 17 to prevent light from being directly emitted from the light source unit 200. Reflective diffusion covers 71a and 71b can be provided. As shown in FIG. 10A, the reflection diffusion cover 71a may be an aluminum ring having a U-shaped cross section. In this case, it is preferable to mirror-finish the inner surface of the ring because light utilization efficiency is improved. As shown in FIG. 10B, a reflective diffusion cover 71b having a triangular cross section having an inclined reflective surface may be used. In this case, the reflection diffusion cover 71b can use either an opaque material or a translucent material. These reflection diffusion covers 71a and 71b can be fixed to the isolation wall 31 later.

  According to the illuminating devices 100A and 100B provided with the reflection diffusion covers 71a and 71b, light from each light emitting element of the second LED light emitting element 11b is reflected or diffused by the reflection diffusion covers 71a and 71b, and light from each LED light emitting element. Is not directly emitted, and when the illumination devices 100A and 100B are viewed from an oblique direction, the light source itself is not dazzled.

FIG. 11 is a ray tracing diagram of an illuminating device in which an inclined region is provided in the reflection band.
The illumination device 100 </ b> C may include an inclined region 15 a in which the reflection band 15 is inclined at an angle θ toward the light source unit 200 on the light emission side of the annular support member 17.
Thus, the inclination angle of the light emitted from the second LED light emitting element 11b can be increased by adopting a configuration in which the light emission side of the reflection band 15 is inclined inward. That is, the light emitted downward from the second LED light emitting element 11b is reflected by the reflection band 15 of the inclined region 15a inclined inward below, so that it is reflected only by the vertical reflection band 15. The inclination angle can be increased in a direction closer to the horizontal. The inclined region 15a is not limited to a linear shape, and may be a curved surface.

12A and 12B are explanatory views showing a plan view and a longitudinal cross-sectional view of the illumination device provided with the reflection flap, as shown in FIG.
The illuminating device 100D is provided with reflection flaps 67 that are tiltably supported toward the light source unit 200 on the light emission side of the reflection band 15 of the annular support member 17 at a plurality of locations in the circumferential direction (eight locations in the illustrated example). It may be.
According to the illuminating device 100D provided with the reflection flap 67, the inclination of the reflection flaps 67 at a plurality of arbitrary positions arranged in the circumferential direction changes the inclination of the light in the horizontal direction at any position in the circumferential direction. The spread can be freely controlled. That is, it is possible to make a distribution in which the inclination angle of the oblique emission component is small in a part in the circumferential direction and the inclination angle of the oblique emission component is large in another part in the circumferential direction.

FIG. 13 is a ray tracing diagram of an illumination device in which a light diffusing surface is provided in a reflection band.
In the illumination device 100E, a light diffusion surface 69 may be provided on the surface of the reflection band 15. The light diffusion surface 69 can be formed with a distance d that hangs further downward from a distance h to the lower end of the isolation wall 31.
According to the illuminating device 100E provided with the light diffusion surface 69, the light emitted from the second LED light emitting element 11b is reflected by the reflection band 15 that becomes the light diffusion surface 69, and the reflected light is uniformly dispersed, Directional light isotropically emitted regardless of the position of the light source. Further, since the reflection band 15 becomes the light diffusion surface 69, the position of the light source can be made difficult to be visually recognized. That is, glare can be prevented.

FIG. 14 is a ray tracing diagram of the illuminating device in which the second LED light emitting element can freely move back and forth.
In the illumination device 100F, each light emitting element of the second LED light emitting element 11b is mounted on an annular substrate 73 disposed so as to surround the central substrate 70 on which each light emitting element of the first LED light emitting element 11a is mounted. The substrate 70 is supported so as to freely advance and retreat in the straight direction. As the advancing / retreating mechanism in this case, an appropriate mechanism such as an engagement structure using minute unevenness or a screwing structure using screws can be employed.
According to the illumination device 100F, while the first LED light emitting element 11a is fixed, only the second LED light emitting element 11b has a movable structure, the structure is simplified, and the fine adjustment of the inclination angle with respect to the oblique emission component is easy. It becomes.

FIG. 15 is an explanatory view showing a bottom view of a lighting device in which a reflection band is provided on a part of the annular support member in the circumferential direction, and (b) showing a longitudinal sectional view.
The illumination device 100G selectively forms the reflection band 15 only in the region of the angle ψ, which is a part of the annular support member 17 in the circumferential direction, and reduces the light reflection efficiency outside this region (for example, black paint) Etc.). Besides reducing the reflection efficiency, for example, the light may be returned to the light source unit side so as not to be used as illumination light.
According to this illumination device 100G, the oblique direction emission component can be generated only in the region where the reflection band 15 is formed, and an asymmetric illumination light distribution can be easily formed. That is, it is possible to form a light distribution pattern with a higher degree of freedom, such as illuminating only in a specific direction to an oblique direction and illuminating only in the other direction downward. For example, it is possible to easily obtain a desired illuminance distribution by actively generating an oblique emission component on the wall surface near the illumination device 100G and suppressing the oblique emission component for a direction without a wall surface. Further, for regions where the oblique emission component is not required, further power saving can be achieved by adopting a configuration in which the second LED light emitting element 11b in that portion is not arranged or a configuration in which no current is supplied even if arranged. .

FIG. 16 is a longitudinal sectional view of the lighting device in which the light source unit is inclined by changing the locking position of the locking claw.
In the lighting device 100 </ b> H, at least one of the locking claws 21 of the fixing ring 19 is engaged with the locking portion 25 of the annular support member 17 at a position in a straight direction different from the other locking claws 21. That is, the central axis 74 of the light source unit 200 is inclined by the angle θ1 with respect to the vertical axis 76.
As described above, when any one of the locking claws 21 is engaged with the locking portions 25 having different height positions, the light source unit 200 is supported inclined with respect to the axial direction of the annular support member 17, and light emission is performed. You can tilt the direction easily.

Next, another example of an illumination device configured using a light source unit having a shape different from that of the light source unit shown in FIG. 3 will be described.
FIG. 17 is a perspective view of the light source unit in which the reflecting mirror member is formed in a convex shape, and FIG. 18 is a plan view of the light source unit of FIG. 17 viewed from the light emitting side.
The light source unit 200A is formed such that the light emitting side end portion of the reflecting mirror member 75A is inclined from the outermost edge side of the arrangement region of the concave curved reflecting portion 65 toward the central portion of the reflecting mirror member 75A, and the light source unit 200A The emission side end portion is formed to protrude in a convex shape. The reflected light member 75A is formed with a plurality of concave curved surface reflecting portions 65, and the first LED light emitting element 11a is arranged at the bottom position opposite to the large diameter side. The length of the optical axis direction of each concave curved surface reflecting portion 65 is made longer than the length of the optical axis direction of the peripheral portion of the reflecting mirror member 75A. The light source unit 200A is mounted instead of the light source unit shown in FIG.

  FIG. 19 shows a vertical cross-sectional view of a concave curved surface reflecting portion having a different length in the optical axis direction, and FIG. 20 shows a vertical cross sectional view of a light source unit provided with the concave curved surface reflective portion of FIG. As shown in FIGS. 19 and 20, in the concave curved surface reflecting portion 65a having a short optical axis length in the peripheral portion, the oblique emission component can be increased by the diffused light, and the concave curved surface having a long optical axis length in the central portion. In the reflection part 65b, the reach | attainment distance of an emitted light can be extended, and a straight direction output component can be increased. As a result, it is possible to improve the separation between the straight direction outgoing component and the oblique direction outgoing component. Further, when the lighting device including the light source unit 200A is installed on the ceiling, the light emitting side end portion of the reflecting mirror member 75A protruding as a convex surface can be seen from obliquely below, and the lighting device is confirmed to be turned on. Becomes easy. The reflecting mirror member 75A can be made of, for example, a resin material such as polycarbonate, and the inner peripheral surface of the concave curved reflecting portion is a light diffusion surface that roughens the surface of the resin material itself. In addition to the light diffusing surface made of a resin material, for example, a light diffusing film is formed on a metal material such as aluminum (an alumite film if aluminum, etc.), or a coating film containing appropriate light diffusing fine particles is formed. May be.

In the light source unit 200A in which the light emitting side of the reflecting mirror member 75A is convex, as shown in FIG. 19, a predetermined distance LM is formed on the mirror surface 77 from the first LED light emitting elements 11a of the concave curved reflecting portions 65a and 65b. The predetermined distance LD on the radial side can be the light diffusion surface 79.
According to the light source unit 200A in that case, the mirror surface 77 having a predetermined height is formed at the bottom position opposite to the large-diameter side of the concave curved reflecting portions 65a and 65b, thereby allowing the first LED light emitting element 11a to exit. It is possible to suppress a decrease in the intensity of the component emitted in the straight direction of the incident light. Further, as shown in FIG. 20, the light diffusing surface 79 is formed on at least the surface of the concave curved reflecting portion 65 facing outward, that is, the inner peripheral surface of the concave curved reflecting portion 65 that can be observed from the outside. The outgoing light of the outward oblique direction outgoing component can be obtained.

Next, another example of an illumination device configured using a light source unit having a shape different from the above will be described.
21 is a perspective view of a light source unit having a reflecting mirror member formed in a concave shape, FIG. 22 is a plan view of the light source unit of FIG. 21 as viewed from the light emitting side, and FIG. 23 is a concave light source unit shown in FIG. FIG.
The light source unit 200 </ b> B has a reflecting mirror member 75 </ b> B in which LED light emitting elements are respectively arranged at the bottom position opposite to the large diameter side of the plurality of concave curved reflecting portions. The light source unit 200B is formed such that the light emitting side end of the reflecting mirror member 75B is inclined from the outermost edge side of the array region of the concave curved reflecting portion 65 toward the central portion of the reflecting mirror member 75B. The light emission side end is recessed in a concave shape. At least a part of the inner peripheral surface of the concave curved reflecting portion 65 (similar to the light source unit 200A) is formed by the light diffusing surface 69, and the diffuse reflected light from this light diffusing surface generates an oblique emission component. In this configuration, the light source unit 200B is mounted instead of the light source unit shown in FIG.

  In the light source unit 200B, the length of the concave curved reflecting portion 65 in the optical axis direction is made longer than the length in the optical axis direction of the central portion of the reflecting mirror member 75B. The concave curved reflecting portion 65a having a long optical axis length in the peripheral portion can extend the arrival distance of outgoing light and increase the outgoing component in the straight direction, and the concave curved reflecting portion 65b having a short optical axis length in the central portion. Then, the oblique emission component can be increased. As a result, it is possible to improve the separation between the straight direction outgoing component and the oblique direction outgoing component.

  Further, since the inner peripheral surface of the concave curved reflection portion 65 provided radially from the center of the concave curved surface of the light emitting side end of the reflecting mirror member 75B acts as the light diffusing surface 69, the oblique emission component is simple. Can be generated.

In the light source units 200A and 200B, the oblique direction emission component is obtained without providing the second LED light emitting element, but it may be configured to further include the second LED light emitting element.
FIG. 24 is an explanatory view showing a bottom view of a light source unit including a convex reflector member and an annular light source, and (b) showing a side view.
The light source unit 200C includes a convex reflecting mirror member 75C, and further includes a plurality of second LED light emitting elements 11b arranged in a ring shape. And if the outer peripheral surface of the isolation wall 31 is made into the mirror surface 81, the oblique direction emission component can be further increased by incorporating this light source unit 200C into the illumination device shown in FIGS.

Here, a configuration example of still another lighting device will be described.
FIG. 25 is a ray tracing diagram of an illuminating device including a reflection member for generating an oblique emission component.
In the illumination device 100J, the light source unit 200 receives a part of the emitted light from the plurality of first LED light emitting elements 11a and reflects or diffuses the reflected light to produce the oblique emitted component light. Is provided. The oblique direction emission component generating reflecting member 85 is, for example, an annular member having a triangular cross section with an inclined surface as a reflecting surface 85 a, and is supported on the flat substrate 29 via a bracket 87.
According to the illumination device 100J, even if an LED light-emitting element dedicated to the oblique direction component is not provided, light of the oblique direction emission component is generated with a simple structure by reflected light or diffused light from the oblique direction emission component generation reflecting member 85. It becomes possible. Therefore, it is possible to easily obtain light of the straight direction emission component and the oblique direction emission component without making the reflecting mirror member of the LED light emitting element complicated.

It is a disassembled perspective view of the illuminating device which concerns on this invention. FIG. 2 is a perspective view in which a part of the lighting device shown in FIG. 1 is cut away. It is a bottom view of a light source unit. It is the ray tracing diagram which represented the light source unit insertion state by (a), and the drawing-out state by (b). It is explanatory drawing which represented the correlation with the position of a light source unit, and a diagonal direction emitted component by (a), (b), (c). It is a circuit diagram showing an example of the drive circuit of a light source unit. It is a perspective view showing the wall washer and spot illumination of the illuminating device shown in FIG. It is explanatory drawing showing the example of adjustment of a wall washer area | region. It is explanatory drawing showing the illuminance distribution of (a), (b), (c) where the 2nd focus of the concave curved-surface mirror which consists of elliptical curved surfaces is a different position, respectively. It is the ray tracing figure which represented the example of the illuminating device which provided a different reflection diffusion cover by (a), (b). It is a ray trace figure of the illuminating device by which the inclination area | region was provided in the reflective band. It is explanatory drawing which represented the planar view of the illuminating device provided with the flap for reflection to (a), and represented the longitudinal cross-sectional view with (b). It is a ray tracing figure of the illuminating device in which the light diffusing surface was provided in the reflective band. It is a ray tracing figure of the illuminating device in which the 2nd LED light emitting element became movable back and forth. It is explanatory drawing which represented the lower surface view of the illuminating device which provided the reflective band in a part of circumferential direction of the cyclic | annular support member, and (b) showed the longitudinal cross-sectional view. It is the longitudinal cross-sectional view of the illuminating device which changed the latching position of the latching claw and inclined the light source unit. It is a perspective view of the light source unit in which the reflective mirror member was formed in convex shape. It is the top view which looked at the light source unit of FIG. 17 from the light-projection side. It is a longitudinal cross-sectional view of the concave curved surface reflection part from which the length of an optical axis direction differs. It is a longitudinal cross-sectional view of the light source unit provided with the concave curved surface reflection part of FIG. It is a perspective view of the light source unit in which the reflective mirror member was formed in concave shape. It is the top view which looked at the light source unit of FIG. 21 from the light-projection side. FIG. 22 is a ray tracing diagram of the concave light source unit shown in FIG. 21. It is explanatory drawing which represented the lower surface view of the light source unit provided with the convex-shaped reflective mirror member and the cyclic | annular light source, and (b) represented the side view. It is a ray tracing figure of the illuminating device provided with the reflection member for diagonal direction outgoing component production | generation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 LED light emitting element 11a 1st LED light emitting element 11b 2nd LED light emitting element 15 Reflective band 15a Inclination area | region 17 Annular support member 19 Fixing ring 21 Locking claw 25 Locking part 31 Isolation wall 41a 1st drive circuit 41b 2nd drive circuit 65 Concave curved surface reflection portion 67 Reflective flap 69 Light diffusion surface 70 Central substrate 71a, 71b Reflection diffusion cover 73 Annular substrate 75 Reflective mirror member 77 Mirror surface 85 Reflective member 100, 100A, 100B, 100C, 100D, 100E , 100F, 100G, 100H, 100J Illumination device 200, 200A, 200B, 200C Light source unit

Claims (22)

An illumination device including a plurality of LED light emitting elements,
A light source unit that generates light emitted from the plurality of LED light emitting elements, and a light emitted from a straight traveling direction outgoing component and an oblique outgoing component inclined from the straight traveling direction;
A light source unit that generates light emitted from the plurality of LED light emitting elements into a straight traveling direction outgoing component and an oblique outgoing component tilted from the straight traveling direction;
The light source unit is housed inside and supported so as to be able to advance and retreat in the straight direction, and at least a reflection band having light reflectivity only with respect to the light emitted in the oblique direction is provided on the inner peripheral surface. An annular support member formed at the side end;
A lighting device comprising: The lighting device according to claim 1,
By inserting the light source unit from the light emission side of the annular support member into the annular support member, the inclination angle of the reflected light component from the reflection band with respect to the oblique direction emission component with respect to the straight traveling direction is reduced,
An illumination device that increases an inclination angle of the reflected light component from the reflection band with respect to the straight traveling direction by pulling out the light source unit from the inside of the annular support member to the light emitting side. The lighting device according to claim 1 or 2,
The light source unit is fixed to the inner peripheral side, and includes a fixing ring in which a plurality of locking claws protrude from the outer peripheral side.
The said annular support member is an illuminating device by which the latching | locking part engaged with the side surface of this cyclic | annular support member corresponding to the said latching claw was formed in the several position along the said rectilinear advance direction. The lighting device according to claim 3,
The lighting device in which at least one of the locking claws of the fixing ring is engaged with the locking portion of the annular support member at a position in the straight direction different from the other locking claws. It is an illuminating device of any one of Claims 1-4, Comprising:
A plurality of first LED light emitting elements that emit light of the light component emitted in the straight direction, and a plurality of second LED light emitting elements that are arranged in an annular shape surrounding the first LED light emitting element and emit light of the oblique light emitting component. A lighting device having an element. The lighting device according to claim 5,
A lighting device in which a first drive circuit that drives the plurality of first LED light-emitting elements and a second drive circuit that drives the plurality of second LED light-emitting elements are provided so as to be capable of independently controlling emission luminance. The lighting device according to claim 5 or 6,
An illumination device in which an isolation wall protruding in the straight direction is formed between the first LED light emitting element and the second LED light emitting element. The lighting device according to claim 7,
A lighting device provided with a reflection diffusion cover for preventing light from the second LED light emitting element from being directly emitted from the light source unit between the isolation wall and the reflection band of the annular support member. It is an illuminating device of any one of Claims 1-7, Comprising:
The illumination device including an inclined region in which the reflection band is inclined toward the light source unit on a light emission side of the annular support member. The lighting device according to claim 9,
An illuminating device provided with a plurality of reflecting flaps supported in a tiltable manner toward the light source unit on a light emitting side of the reflection band of the annular support member. It is an illuminating device of any one of Claims 1-10, Comprising:
The lighting device in which the plurality of LED light emitting elements are respectively disposed on the same plane substrate. It is an illuminating device of any one of Claims 4-10, Comprising:
Each light emitting element of the second LED light emitting element is mounted on an annular substrate disposed around a central substrate on which each light emitting element of the first LED light emitting element is mounted, and the annular substrate goes straight with respect to the central substrate. An illuminator that is supported so that it can move forward and backward. It is an illuminating device of any one of Claims 1-3,
The lighting device includes a reflection member for generating an oblique emission component that receives and reflects or diffuses a part of the emission light from the plurality of LED light emitting elements to generate light of the oblique emission component. It is an illuminating device of any one of Claims 1-13, Comprising:
An illumination device in which a surface of the reflection band is a mirror surface. It is an illuminating device of any one of Claims 1-13, Comprising:
A lighting device in which a surface of the reflection band is a diffusion surface. It is an illuminating device of any one of Claims 1-15, Comprising:
The illumination device in which the reflection band is formed only in a partial region with respect to the entire circumference of the annular support member. It is an illuminating device of any one of Claims 1-16, Comprising:
The light source unit has a reflecting mirror member in which the LED light emitting elements are respectively disposed at the bottom position opposite to the large diameter side of the plurality of concave curved reflecting portions;
The light emitting side end of the reflecting mirror member is formed to be inclined from the outermost edge side of the arrangement region of the concave curved reflecting portion toward the central portion of the reflecting mirror member, and the concave curved reflecting portion of the concave curved reflecting portion is formed. An illumination device in which a light emitting side inner peripheral surface is formed including a light diffusing surface, and diffusely reflected light from the light diffusing surface generates the oblique emission component. The lighting device according to claim 17,
The length of the concave curved reflecting portion in the optical axis direction is made longer than the length in the optical axis direction of the central portion of the reflecting mirror member, and the light emitting side end of the reflecting mirror member is concave. Lighting device formed in. The lighting device according to claim 17,
The length of the concave curved reflecting portion in the optical axis direction is made longer than the length in the optical axis direction of the peripheral portion of the reflecting mirror member, and the light emitting side end portion of the reflecting mirror member is projected. Lighting device formed into a shape. The illumination device according to any one of claims 17 to 19,
The concave curved reflecting portion is formed including a parabolic surface,
The illuminating device in which the plurality of LED light emitting elements are arranged at a paraboloid focal position of the concave curved reflecting portion. The illumination device according to any one of claims 17 to 19,
The concave curved reflection part is formed including a spheroid curved surface;
The illumination device in which the plurality of LED light emitting elements are arranged at one focal position of the spheroid curved surface. The lighting device according to claim 20 or claim 21, wherein
The concave curved reflecting portion of the reflecting mirror member is an illumination device in which a concave curved mirror formed with a paraboloid and a concave curved mirror formed with a spheroidal curved surface are mixedly arranged.

Images