JP4999131B1 - Luminous flux control member and lighting device - Google Patents

Abstract

The present invention provides a light flux control member capable of bringing a light distribution characteristic closer to an incandescent light bulb without causing deterioration in illumination quality due to color unevenness, and an illumination device using this light flux control member.
A cylindrical side wall part 6 having one end fixed on a substrate 4 on which a light emitting element 2 is mounted, and a lid part 8 for closing the other end side of the side wall part 6 are provided. The inner surface 10 of the lid portion 8 is a concave surface located closer to the light emitting element 2 in the central portion on the central axis L <b> 1 than the outer peripheral portion, and is covered with the transmissive reflection film 13. The transmission / reflection film 13 reflects part of the light from the light emitting element 2 toward the side wall 6 and transmits the remaining part of the light from the light emitting element 2. The outer surface 14 of the lid portion 8 emits the incident light that has been transmitted through the transmissive reflection film 13 to the outside of the lid portion 8. The side wall 6 emits light that has been reflected by the transmissive reflective film 13 and reached the inner peripheral surface 17 and light that has directly reached the inner peripheral surface 17 from the light emitting element 2 to the outer side from the outer peripheral surface 18.
[Selection] Figure 3

Description

The present invention relates to a light flux control member that controls the emission of light from a light emitting element (for example, an LED), and an illumination device that uses the light flux control member, which can be used in place of an incandescent bulb. It is.

In recent years, from the viewpoint of energy saving and environmental conservation, an illumination device using an LED as a light source (for example, L
ED bulbs) are used as an alternative to incandescent bulbs.

However, the conventional illumination device using an LED as a light source emits light only in the forward direction, and does not emit light in all directions unlike an incandescent bulb. As a result, when a conventional lighting device using an LED as a light source is used for indoor lighting, it cannot obtain reflected light from a ceiling or a wall surface like an incandescent bulb, and illuminates a room extensively like an incandescent bulb. I couldn't.

In order to bring the light distribution characteristic of such a conventional lighting device using an LED as a light source closer to the light distribution characteristic of an incandescent light bulb, it is conceivable to control the traveling direction of light emitted from the LED with a light flux control member.

FIG. 29 shows the direction of travel of light emitted from the LED 100 as a light direction conversion element (light flux controlling member) 1.
The technique controlled by 01 is disclosed. The light redirecting element 101 shown in FIG.
The light from D100 is reflected by B surface (rotary paraboloid) 102 and E surface (chamfered inclined surface) 103, and the light reflected by these B surface 102 and E surface 103 is mounted on D surface 104 (LED 100 is mounted). Further, the light reflected by the D surface 104 is emitted from the B surface 102. In addition, the light redirecting element 101 is reflected by the B surface 102 and C
The light reaching the surface 105 is emitted obliquely rearward (downward) outside.

By controlling the traveling direction of the light of the LED 100 with such a light direction conversion element 101, it is possible to obtain outgoing light in the upward direction (forward direction) and the horizontal direction (direction orthogonal to the forward direction). If the light direction changing element 101 is applied to an illumination device using the LED of
It is thought that the light distribution characteristic can be brought close to the light distribution characteristic of an incandescent bulb (see Patent Document 1).

JP 2008-216540 A (refer to FIG. 1 in particular)

However, in the light redirecting element 101 shown in FIG. 29, light satisfying the total reflection condition with respect to the B surface 102 among the light from the LED 100 is reflected by the B surface 102 and totally reflected with respect to the B surface 102. Light that does not satisfy the conditions is transmitted through the B surface 102. Therefore, when the light redirecting element 101 shown in FIG. 29 is used, the light that does not satisfy the total reflection condition with respect to the B surface 102 is
When the light passes through the B surface 102, color separation occurs, resulting in uneven color, resulting in a deterioration in illumination quality. In particular, in the light direction changing element 101 shown in FIG. 29, when the light emitting area of the LED 100 is large enough to be regarded as a point light source, the ratio of light that does not satisfy the total reflection condition to the B surface 102 increases, and the emitted light The color unevenness is more likely to occur.

Accordingly, an object of the present invention is to provide a light flux control member capable of bringing the light distribution characteristic closer to an incandescent bulb without causing deterioration in illumination quality due to color unevenness, and an illumination device using the light flux control member. And

As shown in FIGS. 1 to 3, 9, 11, 13, 15, 17 to 18, 19, 21, and 23, the invention of claim 1 is provided on substrates 4 and 32. The light flux controlling member 3 is disposed so that the central axis L1 is positioned concentrically with the center L of the light flux of the one or the plurality of light emitting elements 2 mounted on the light emitting element 2, and is disposed via the light emitting element 2 and the air layer. Is. A transmission / reflection film 13 is formed on the surface of the light emitted from the light emitting element 2 that intersects with a part of the emitted light. in front
The surface intersecting with a part of the emitted light is such that the central portion 11 located on the central axis L1 is from the outer peripheral portion 12.
Is also a concave surface arranged at a position close to the light emitting element 2 and the front from the center portion 11.
It has a concave surface whose inclination becomes gentler toward the outer peripheral portion 12. Further, the transmissive reflection film 13 further reflects a part of the part of the emitted light and transmits the remaining part of the part of the emitted light.
The invention of claim 2 is shown in FIGS. 1 to 3, 9, 11, 13, 15, 17 to 18, FIG.
19, FIG. 21 and FIG. 23, one or more light emitting elements mounted on the substrates 4 and 32
The light emitting element is arranged so that the central axis L1 is positioned concentrically with the center L of the luminous flux of the element 2.
The present invention relates to the light flux controlling member 3 arranged via the child 2 and the air layer. And the light emission
A transmission / reflection film 13 is formed on the surface of the emitted light of the element 2 that intersects with a part of the emitted light. in front
The surface intersecting with a part of the emitted light is such that the central portion 11 located on the central axis L1 is from the outer peripheral portion 12.
Is also a concave surface arranged at a position close to the light emitting element 2 and the front from the center portion 11.
It has a concave surface whose inclination becomes gentler toward the outer peripheral portion 12, and the center portion 11 and the front
A point where the inclination angle becomes zero occurs at a position between the outer peripheral portions 12 and close to the outer peripheral portion 12.
Shape. Further, the transmission / reflection film 13 reflects a part of the part of the emitted light.
The remainder of the part of the emitted light is transmitted.
The invention of claim 3 is mounted on substrates 4 and 32 as shown in FIG. 25, FIG. 26 and FIG.
The center axis L1 is positioned so as to be concentric with the center L of the luminous flux of the plurality of light-emitting elements 2,
In addition, the present invention relates to a light flux controlling member 3 disposed via the light emitting element 2 and an air layer.
And on the surface intersecting with a part of the emitted light of the emitted light of the light emitting element 2,
A support portion 27 fixed to the center axis L1 is formed concentrically. The part of the emitted light and
The intersecting surface is such that the central portion 11 located on the central axis L1 is closer to the light emitting element 2 than the outer peripheral portion.
The concave surface is arranged at a large position and is directed from the central portion 11 toward the outer peripheral portion.
Accordingly, the transmission / reflection film 1 has a concave surface with a gentle slope and surrounds the support portion 27.
3 is formed. In addition, the transmission / reflection film 13 is configured to further reduce a part of the part of the emitted light.
It reflects and transmits the remainder of the part of the emitted light.
The invention of claim 4 is mounted on substrates 4 and 32 as shown in FIGS. 25, 26 and 28.
The center axis L1 is positioned so as to be concentric with the center L of the luminous flux of the plurality of light-emitting elements 2,
In addition, the present invention relates to a light flux controlling member 3 disposed via the light emitting element 2 and an air layer.
And on the surface intersecting with a part of the emitted light of the emitted light of the light emitting element 2,
A support portion 27 fixed to the center axis L1 is formed concentrically. The part of the emitted light and
The intersecting surface is such that the central portion 11 located on the central axis L1 is closer to the light emitting element 2 than the outer peripheral portion.
The concave surface is arranged at a large position and is directed from the central portion 11 toward the outer peripheral portion.
And having a concave surface with a gentle inclination, between the central portion 11 and the outer peripheral portion, and
The point where the inclination angle becomes zero is formed at a position near the outer peripheral portion, and the support portion 27 is removed.
A transmitting / reflecting film 13 is formed on the surrounding portion. In addition, the transmissive reflection film 13 is the part
Further, a part of the outgoing light is reflected and the remaining part of the outgoing light is transmitted.
.

The invention of claim 5 is the light flux controlling member 3 according to any one of claims 1 to 4 ,
The transmissive reflection film 13 is formed on the inner surface 10 facing the light emitting element 2, and the outer surface 14 that is in a reverse side relationship with the inner surface 10 transmits light incident on the inside through the transmissive reflection film 13. It comes out to.

The invention of claim 6 is a light emitting device mounted on a substrate 4 as shown in FIGS. 1 to 3, 9, 11, 13, 15, 17 to 18, 19 and 21. A lid portion 8 that is disposed through the light emitting element 2 and an air layer so as to be concentric with the optical axis L of the second optical axis L, and is formed so as to intersect the optical axis L; and the lid portion 8 And a side wall portion 6 extending from the outer edge to the substrate 4 side. In this invention, the inner surface 10 of the lid portion 8 is such that the central portion 11 located on the central axis L <b> 1 is closer to the light emitting element 2 than the outer peripheral portion 12.
It is a concave surface arranged at the center and is directed from the central portion 11 toward the outer peripheral portion 12.
It has a concave surface with a gentle slope and is covered with the transmission reflection film 13. The transmissive reflective film 13 reflects a part of the light from the light emitting element 2 toward the side wall portion 6, and the light emitting element 2.
The remainder of the light from is transmitted. The outer surface 14 of the lid portion 8 emits the incident light that has been transmitted through the transmissive reflection film 13 to the outside of the lid portion 8. The side wall 6 emits light that has been reflected by the transmissive reflection film 13 and has reached the inner peripheral surface 17 and light that has directly reached the inner peripheral surface 17 from the light emitting element 2 from the outer peripheral surface 18 to the outside. It has become.
The invention of claim 7 is the same as that shown in FIGS. 1 to 3, 9, 11, 13, 15, 17 to 18, FIG.
19 and FIG. 21, the central axis is concentric with the optical axis L of the light emitting element 2 mounted on the substrate 4.
The light emitting element 2 and the air layer are arranged so that L1 is positioned, and intersects the optical axis L.
And the side wall portion 6 extending from the outer edge of the lid portion 8 to the substrate 4 side.
The light flux controlling member 3 is provided. In this invention, the inner surface 10 of the lid 8 is
The position where the central portion 11 located on the central axis L1 is closer to the light emitting element 2 than the outer peripheral portion 12
It is a concave surface arranged at the center and is directed from the central portion 11 toward the outer peripheral portion 12.
And having a concave surface with a gentle slope, between the central portion 11 and the outer peripheral portion 12, and
And a shape in which a point where the inclination angle becomes zero is generated at a position close to the outer peripheral portion 12, and the transmission / reflection film 1
3 is covered. The transmission / reflection film 13 allows a part of the light from the light emitting element 2 to pass through the side wall portion.
6 is reflected, and the remainder of the light from the light emitting element 2 is transmitted. The lid
The outer surface 14 of the portion 8 emits the incident light that has passed through the transmissive reflection film 13 and is emitted to the outside of the lid portion 8.
. The side wall 6 is reflected by the transmission / reflection film 13 and reaches the inner peripheral surface 17 and the light emission.
The light directly reaching the inner peripheral surface 17 from the optical element 2 is emitted outward from the outer peripheral surface 18.
ing.

According to an eighth aspect of the present invention, in the light flux controlling member 3 according to the sixth or seventh aspect of the present invention, the lid portion 8 is provided.
It is characterized in that the inner surface 10 of this is an aspherical shape.

The invention of claim 9 is the light flux controlling member 3 according to any one of claims 6 to 8 ,
The outer peripheral surface 18 of the side wall portion 6 is a light diffusion surface.

The invention of claim 10 is characterized in that, in the light flux controlling member 3 according to any one of claims 6 to 9 , the outer surface 14 of the lid portion 8 is a light diffusion surface.

The invention of claim 11 is characterized in that, in the light flux controlling member 3 according to any one of claims 6 to 10 , the lid and the side wall are formed of a material having a light scattering ability.

The invention according to claim 12 is the invention according to any one of claims 1 to 11 , wherein the light-emitting element 2 is mounted on the substrates 4 and 32, and the light is emitted from the light-emitting element 2 fixed on the substrates 4 and 32. And a light flux control member 3 according to the above.

The light flux controlling member of the present invention reflects part of the light from the light emitting element by the transmission / reflection film, and does not reflect the light from the light emitting element by total reflection. Can be prevented, and light can be emitted in a wide range from the lid and the side wall.

Moreover, the illuminating device having the light flux controlling member of the present invention can bring the light distribution characteristic of the illumination light close to the light distribution characteristic of the incandescent bulb, and can emit high-quality illumination light without color unevenness.

1 shows a lighting device according to a first embodiment of the present invention. 1A is a plan view of the lighting device, FIG. 1B is a front view of the lighting device, and FIG. 1C is cut along line A1-A1 in FIG. It is sectional drawing of the illuminating device shown, and FIG.1 (d) is a back view of an illuminating device. 1 shows a light flux controlling member according to a first embodiment of the present invention. 2A is a plan view of the light flux controlling member 5, FIG. 2B is a front view of the light flux controlling member, and FIG. 2C is taken along line A2-A2 of FIG. 2A. FIG. 2D is a cross-sectional view of the light flux controlling member 5 cut away, and FIG. FIG. 3A is a schematic diagram for explaining the light reflecting function of the transmissive reflecting film of the light flux controlling member, and FIG. 3B is a schematic diagram for explaining the light transmitting function of the transmissive reflecting film of the light flux controlling member. FIG. It is a figure which shows the light distribution characteristic of an illuminating device in case the reflectance of the permeation | transmission reflection film of a light beam control member is 55%. It is a figure which shows the light distribution characteristic of an illuminating device in case the reflectance of the permeation | transmission reflective film of a light beam control member is 65%. It is a figure which shows the light distribution characteristic of an illuminating device in case the reflectance of the permeation | transmission reflection film of a light beam control member is 75%. It is a figure which shows the light distribution characteristic of an illuminating device in case the reflectance of the permeation | transmission reflection film of a light beam control member is 85%. It is a figure for demonstrating the illumination intensity measuring method of the light radiate | emitted from an illuminating device. It is a figure which shows 2nd Embodiment of the light beam control member which concerns on this invention, and an illuminating device, and is sectional drawing corresponding to FIG.1 (c). It is a figure which shows the light distribution characteristic of the illuminating device shown in FIG. It is a figure which shows 3rd Embodiment of the light beam control member which concerns on this invention, and an illuminating device, and is sectional drawing corresponding to FIG.1 (c). It is a figure which shows the light distribution characteristic of the illuminating device shown in FIG. It is a figure which shows 4th Embodiment of the light beam control member and illuminating device which concern on this invention, and is sectional drawing corresponding to FIG.1 (c). It is a figure which shows the light distribution characteristic of the illuminating device shown in FIG. It is a figure which shows 5th Embodiment of the light beam control member and illuminating device which concern on this invention, and is sectional drawing corresponding to FIG.1 (c). It is a figure which shows the light distribution characteristic of the illuminating device shown in FIG. It is a figure which shows 6th Embodiment of the light beam control member and illuminating device which concern on this invention, and is sectional drawing corresponding to FIG.1 (c). It is a figure which shows 7th Embodiment of the light beam control member and illuminating device which concern on this invention, and is sectional drawing corresponding to FIG.1 (c). It is a figure which shows 8th Embodiment of the light beam control member and illuminating device which concern on this invention, and is sectional drawing corresponding to FIG.1 (c). It is a figure which shows the light distribution characteristic of the illuminating device shown in FIG. It is a figure which shows 9th Embodiment of the light beam control member and illuminating device which concern on this invention, and is sectional drawing corresponding to FIG.1 (c). It is a figure which shows the light distribution characteristic of the illuminating device shown in FIG. FIG. 23A is a diagram showing a tenth embodiment of the light flux controlling member and the illumination device according to the present invention, and FIG. 23B is a plan view of the substrate constituting the illumination device according to the present embodiment. It is a figure which shows the light distribution characteristic of the illuminating device shown in FIG. FIG. 25A is a diagram showing an eleventh embodiment of the light flux controlling member and the illumination device according to the present invention, and FIG. 25B is a plan view of a substrate constituting the illumination device according to the present embodiment. It is the same figure as the top view of the board | substrate 4 shown in FIG.23 (b). 10 shows a light flux controlling member according to an eleventh embodiment of the present invention. 26 (a) is a front view of the light flux controlling member, FIG. 26 (b) is a plan view of the light flux controlling member, FIG. 26 (c) is a back view of the light flux controlling member, and FIG. 26 (d) is FIG. It is sectional drawing of the light beam control member shown cut | disconnected along A4-A4 line | wire. It is a figure which shows the light distribution characteristic of the illuminating device shown in FIG. It is a figure which shows 12th Embodiment of the light beam control member and illuminating device which concern on this invention. FIG. 29A is a plan view showing a conventional light flux controlling member (light direction changing element), and FIG. 29B is a cross-sectional view taken along line A3-A3 of FIG. 29A. is there.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(1st Embodiment of an illuminating device)
FIG. 1 shows an illumination device 1 according to this embodiment. 1A is a plan view of the lighting device 1, FIG. 1B is a front view of the lighting device 1, and FIG. 1C is along the line A1-A1 in FIG. It is sectional drawing of the illuminating device 1 cut and shown, and FIG.1 (d) is the illuminating device 1. FIG.
FIG.

As shown in FIG. 1, an illumination device 1 is used in place of an incandescent bulb, and emits light from a light emitting element 2 (for example, an LED sealed by an LED and a sealing member) as a light flux controlling member. The light emitting element 2 and the light flux controlling member 3 are in a one-to-one correspondence. In the illumination device 1, one end (opening end) 5 of the light flux controlling member 3 is fixed with an adhesive on the substrate 4 on which the light emitting element 2 is mounted, and the central axis L 1 of the light flux controlling member 3 is the light emitting element 2. It is located concentrically with the optical axis L. Here, the optical axis L of the light emitting element 2 refers to the traveling direction of light at the center of the three-dimensional outgoing light beam from the light emitting element 2.

(First embodiment of light flux controlling member)
FIG. 2 shows a first embodiment of the light flux controlling member 3. 2A is a plan view of the light flux controlling member 3, FIG. 2B is a front view of the light flux controlling member 3, and FIG. 2C is an A2-A2 line in FIG. 2A. FIG. 2D is a cross-sectional view of the light flux controlling member 3 cut along the line
) Is a rear view of the light flux controlling member 3.

The light flux controlling member 3 is made of, for example, a transparent resin material such as PMMA (polymethyl methacrylate), PC (polycarbonate), EP (epoxy resin), or transparent glass.

The light flux controlling member 3 is formed so that its planar shape is a circular shape, and its central axis L1 coincides with the centroid of the planar shape. The light flux controlling member 3 includes a cylindrical side wall (support) 6 having one end 5 fixed on the substrate 4 and a lid (light flux control) positioned so as to close the other end 7 of the side wall 6. Member main body portion) 8.

The inner surface 10 of the lid portion 8 is such that the central portion 11 located on the central axis L <b> 1 has a sidewall portion 6 rather than the outer peripheral portion 12.
When the light flux controlling member 3 is fixed on the substrate 4, the central portion 11 is disposed closer to the light emitting element 2 than the outer peripheral portion 12. It has a shape (see FIG. 1C). As shown in FIG. 2C, the shape of the inner surface 10 of the lid portion 8 is a curved surface shape in which the inclination gradually decreases from the center portion 11 of the lid portion 8 toward the outer peripheral portion 12 (radially outward). There is an aspherical shape in which a point where the inclination angle is zero is generated at a position between the central portion 11 and the outer peripheral portion 12 and close to the outer peripheral portion 12. The inner surface 10 of the lid 8 is formed with a transmission / reflection film 13 formed by depositing a layer of TiO ₂ and SiO ₂ on the surface, and the entire area on the surface is covered with the transmission / reflection film 13. ing. The transmission / reflection film 13 covering the inner surface 10 of the lid 8 reflects a part of the light from the light emitting element 2 toward the side wall 6, and the remaining light from the light emitting element 2 is inside the lid 8. It is made to enter (refer FIG. 3). The transmission / reflection film 1
3 is formed in a film thickness according to the light reflectivity. The higher the light reflectivity, the thicker the film thickness.

The outer surface 14 of the lid portion 8 has a relationship between the inner surface 10 and the back surface, and is formed so that the thickness along the central axis L1 of the lid portion 8 has the same dimension from the central portion 11 to the outer peripheral portion 12. Transflective film 1
3 and the light incident on the inside of the lid portion 8 is widely emitted to the outside (FIG. 3 (
b)).

The side wall portion 6 is located along the central axis L1 and surrounds the central axis L1, and is formed to have the same inner diameter and the same thickness from one end 5 to the other end 7 side. And
The side wall portion 6 is configured to receive light that has arrived after being reflected by the transmissive reflection film 13 of the lid portion 8 among light emitted from the light emitting element 2 and light that has directly reached among light emitted from the light emitting element 2. The light is emitted widely to the outside (see FIG. 3A).

4 to 7 show the light distribution characteristics of the illumination device 1 according to the light reflectance of the transmission / reflection film 13. Among these, FIG. 4 shows the light distribution characteristic of the illuminating device 1 using the light beam control member 3 in which the light reflectance of the transmissive reflection film 13 is 55%. FIG. 5 shows the light distribution characteristics of the illuminating device 1 using the light flux controlling member 3 whose light reflectance of the transmission / reflection film 13 is 65%. FIG. 6 shows the light distribution characteristics of the illuminating device 1 using the light flux controlling member 3 in which the light reflectance of the transmissive reflecting film 13 is 75%. FIG. 7 shows the light distribution characteristics of the illuminating device 1 using the light flux controlling member 3 in which the light reflectance of the transmissive reflecting film 13 is 85%. 4 to 7, the illuminance meter 16 is located at a position (reference position 0 °) away from the light emission center 15 of the light emitting element 2 along the optical axis L by a predetermined distance as shown in FIG. The illuminance meter 16 is rotated clockwise by 180 ° at 5 ° intervals around the light emission center 15 of the light emitting element 2 as the rotation center, and the illuminance is measured, and the counterclockwise direction (−θ direction) is measured. ), The illuminance is measured by rotating 180 ° at intervals of 5 °, and the relative illuminance (non-dimensional value) when the maximum illuminance is 1 among the measured illuminances is smoothly connected with a curve.

As shown in FIG. 4 to FIG. 7, the horizontal direction (± 90 ° direction) and the backward direction (+90) as the reflectance of the transmission / reflection film 13 formed on the inner surface 10 of the lid portion 8 of the light flux controlling member 3 increases.
Illuminance at ° <θ <+ 180 °, −90 ° <θ <−180 °) increases. In addition, in the light distribution characteristics shown in FIGS. 4 to 6, the illuminance in the forward direction (θ = 0 °) is the largest. On the other hand, the light distribution characteristic shown in FIG. 7 is more horizontal (± 90 ° direction) than the illuminance in the forward direction (θ = 0 °).
Is larger than the illuminance balance indicated by the light distribution characteristics of FIGS.

As described above, the light distribution characteristics of the illuminating device 1 differ depending on the reflectance of the transmissive reflecting film 13 formed on the inner surface 10 of the lid portion 8 of the light flux controlling member 3. Membrane 1
3 is selected, and the transflective film 13 is used for the light flux controlling member 3 so as to obtain such a reflectance.
Is deposited on the inner surface 10 of the lid portion 8.

Here, the lighting device 1 having the light flux controlling member 3 according to the present embodiment has its light distribution characteristic (light distribution characteristic shown in FIG. 6) when the reflectance of the transmission / reflection film 13 of the light flux controlling member 3 is 75%. Is the closest to the light distribution characteristics of incandescent bulbs. Therefore, when the illuminating device 1 having the light flux controlling member 3 according to the present embodiment is used for indoor lighting instead of the incandescent lamp, the transmissive reflection film 13 of the light flux controlling member 3 is used.
The reflectance is preferably 75%.

(Effect of this embodiment)
As described above, the light flux controlling member 3 according to the present embodiment reflects a part of the light from the light emitting element 2 by the transmission / reflection film 13 formed on the inner surface 10 of the lid 8 and also the inner surface 10 of the lid 8. The remaining part of the light from the light emitting element 2 (light not reflected by the transmissive reflecting film 13) is emitted from the outer surface 14 of the lid 8 by the transmissive reflecting film 13 formed on the light emitting element 2. Is not reflected by the total reflection at the lid portion 8, the light emitted from the lid portion 8 does not cause color separation, and the illumination quality is not deteriorated due to color unevenness.

Moreover, the illuminating device 1 having the light flux controlling member 3 according to the present embodiment is reflected from the light emitting element 2 that has been reflected by the transmission / reflection film 13 formed on the inner surface 10 of the lid portion 8 and reached the inner peripheral surface 17 of the side wall portion 6. Light and light directly reaching the inner peripheral surface 17 of the side wall portion 6 from the light emitting element 2 are converted into the outer peripheral surface 1 of the side wall portion 6.
8, and the light from the light emitting element 2 that has entered the lid portion 8 through the transmissive reflection film 13 formed on the inner surface 10 of the lid portion 8 is emitted from the outer surface 14 of the lid portion 8. Not only the direction but also the horizontal direction and the backward direction can be sufficiently distributed, and the light distribution characteristic can be brought close to an incandescent bulb.

Moreover, the illuminating device 1 having the light flux controlling member 3 according to the present embodiment does not cause deterioration in illumination quality due to uneven color, and can be used for indoor lighting or the like instead of the incandescent bulb. As a result, the power consumption can be reduced more than that of the incandescent light bulb.

The outer peripheral surface 18 of the side wall portion 6 of the light flux controlling member 3 may be a light diffusing surface (a surface subjected to a light diffusing process such as a rough surface) so that light emitted from the side wall portion 6 is diffused widely. .

Further, the outer surface 14 of the lid portion 8 of the light flux controlling member 3 may be a light diffusing surface so that the light emitted from the lid portion 8 is diffused widely.

Further, the outer peripheral surface 18 of the side wall portion 6 of the light flux controlling member 3 and the outer surface 14 of the lid portion 8 are light diffusion surfaces,
You may make it diffuse widely the light radiate | emitted from the side wall part 6 and the cover part 8. FIG.

Alternatively, the light flux controlling member 3 may be formed of a material having a light diffusing ability so that light is scattered inside the light flux controlling member 3 and light emitted from the side wall portion 6 and the lid portion 8 is diffused widely.

Further, the transmission / reflection film 13 of the light flux controlling member 3 may be pasted on the inner surface 10 of the lid portion 8 as a film.

In the light flux controlling member 3 according to the present embodiment, a multilayer film of TiO ₂ and SiO ₂ is shown as the transmission / reflection film 13, but instead, a multilayer film of ZnO ₂ and SiO ₂ or Ta ₂ O ₅ and SiO _{2 is used.} The transmission / reflection film 13 may be formed of a dielectric multilayer film such as a multilayer film.

Further, instead of the dielectric multilayer film, the transmission reflection film 13 may be formed of a metal thin film such as aluminum (Al) that can obtain a necessary amount of transmitted light.

In the present embodiment, the method of adjusting the light reflectance of the transmissive reflection film 13 by the film thickness is shown. However, the present invention is not limited to this, and the reflection region is formed to be a dot or mesh pattern. The desired light reflectance may be obtained by adjusting the area ratio of the transmission region and the reflection region. Furthermore, the light reflectivity of this reflection region may be adjusted by the film thickness.

In the present embodiment, the fixing method for adhering the light flux controlling member 3 onto the substrate 4 is shown. However, the present invention is not limited to this, and the light flux controlling member 3 and the substrate 4 are connected to each other via other members such as a case. May be fixed. Further, the fixing of the light flux controlling member 3 and the substrate 4 or the like is not limited to fixing by an adhesive, and a fixing method such as welding or a screwing mechanism may be employed.

Moreover, although the aspect which made the inner surface 10 of the cover part 8 of the light beam control member 3 an aspherical shape was illustrated, it is good also considering a part of inner surface 10 as an inclined surface or a plane.

(2nd Embodiment of a light beam control member and an illuminating device)
FIG. 9 shows a second embodiment of the light flux controlling member 3 and the illumination device 1 according to the present invention. In addition, the light beam control member 3 and the illuminating device 1 according to the present embodiment are given the same reference numerals for components common to the light beam control member 3 and the illuminating device 1 according to the first embodiment, and relate to the first embodiment. The description which overlaps with the description of the light beam control member 3 and the illumination device 1 is omitted.

The light flux controlling member 3 shown in FIG. 9 includes a side wall portion 6 and a lid portion 8 of the light flux controlling member 3 according to the first embodiment.
Are separately formed, and then the lid portion 8 is fitted and fixed (adhered, welded, etc.) in the annular recess 20 formed at the upper end portion of the side wall portion 6 so that the side wall portion 6 and the lid portion 8 are integrated. It is a thing.

In the light flux controlling member 3 having such a configuration, only the lid portion 8 is placed in the vapor deposition processing chamber, and the transmissive reflecting film 13 is formed.
Can be deposited on the inner surface 10, so that the production efficiency can be improved over the production efficiency of the light flux controlling member 3 according to the first embodiment. Note that the light flux controlling member 3 according to the first embodiment.
Is a pretreatment (masking) so that the transmission / reflection film 13 is not deposited on the inner peripheral surface 17 of the side wall 6.
The production efficiency is lower than that of the light flux controlling member 3 according to the present embodiment.

As illustrated in FIG. 10, the lighting device 1 according to the present embodiment includes the lighting device 1 according to the first embodiment.
The illumination light having the same light distribution characteristic as that of the light distribution characteristic (see FIG. 6) can be emitted, and the same effect as that of the illumination device 1 according to the first embodiment can be obtained. In the light flux controlling member 3 according to the present embodiment, the transmission / reflection film 13 is formed on the inner surface 10 of the lid 8 so that the reflectance of the transmission / reflection film 13 is 75%.

(3rd Embodiment of a light beam control member and an illuminating device)
FIG. 11 shows a third embodiment of the light flux controlling member 3 and the illumination device 1 according to the present invention. In addition, the light beam control member 3 and the illuminating device 1 according to the present embodiment are given the same reference numerals for components common to the light beam control member 3 and the illuminating device 1 according to the first embodiment, and relate to the first embodiment. The description which overlaps with the description of the light beam control member 3 and the illumination device 1 is omitted.

The light flux controlling member 3 shown in FIG. 11 is an outer surface 1 of the lid portion 8 of the light flux controlling member 3 according to the first embodiment.
4 is a plane orthogonal to the optical axis L.

As shown in FIG. 12, the illuminating device 1 using such a light flux controlling member 3 has higher illuminance obliquely upward than the light distribution characteristic (see FIG. 6) of the illuminating device 1 according to the first embodiment. The light distribution characteristics are substantially the same as those of the lighting apparatus 1 of the first embodiment except that the light distribution characteristics are the same as those of the lighting apparatus 1 according to the first embodiment. . The light flux controlling member 3 according to the present embodiment has a transmissive reflective film 13 such that the reflectance of the transmissive reflective film 13 is 75%.
Is formed on the inner surface 10 of the lid 8.

(Fourth Embodiment of Light Beam Control Member and Lighting Device)
FIG. 13 shows a fourth embodiment of the light flux controlling member 3 and the illumination device 1 according to the present invention. In addition, the light beam control member 3 and the illuminating device 1 according to the present embodiment are given the same reference numerals for components common to the light beam control member 3 and the illuminating device 1 according to the first embodiment, and relate to the first embodiment. The description which overlaps with the description of the light beam control member 3 and the illumination device 1 is omitted.

The light flux controlling member 3 shown in FIG. 13 is obtained by deforming the side wall portion 6 of the light flux controlling member 3 according to the first embodiment. That is, in the light flux controlling member 3 according to the present embodiment, the inner diameter of the lower end 5 of the side wall portion 6 is smaller than the inner diameter of the connection portion between the side wall portion 6 and the lid portion 8 (the outer peripheral portion 12 of the lid portion 8). The side wall portion 6 has a reverse tapered shape.

As shown in FIG. 14, the illuminating device 1 using such a light flux controlling member 3 suppresses the illuminance obliquely upward as compared with the light distribution characteristic (see FIG. 6) of the illuminating device 1 according to the first embodiment. Except for the light distribution characteristic, it has almost the same light distribution characteristic as the lighting device 1 of the first embodiment.
The same effects as those of the lighting device 1 according to the first embodiment can be obtained. In the light flux controlling member 3 according to the present embodiment, the transmission / reflection film 13 is formed on the inner surface 10 of the lid 8 so that the reflectance of the transmission / reflection film 13 is 75%. In addition, the light flux controlling member 3 according to the present embodiment, like the light flux controlling member 3 according to the second embodiment, after the side wall portion 6 and the lid portion 8 are formed separately, the side wall portion 6
The lid 8 may be fixed and integrated.

(Fifth embodiment of light flux controlling member and illumination device)
FIG. 15 shows a fifth embodiment of the light flux controlling member 3 and the illumination device 1 according to the present invention. In addition, the light beam control member 3 and the illuminating device 1 according to the present embodiment are given the same reference numerals for components common to the light beam control member 3 and the illuminating device 1 according to the first embodiment, and relate to the first embodiment. The description which overlaps with the description of the light beam control member 3 and the illumination device 1 is omitted.

The light flux controlling member 3 shown in FIG. 15 is formed so that the outer peripheral surface 18 of the side wall portion 6 and the outer surface 14 of the lid portion 8 form a continuous hemispherical surface, and the inner peripheral surface 17 of the side wall portion 6 is formed on the side wall portion 6. It is formed so as to form a part of a hemispherical surface concentric with the outer peripheral surface 18.

As shown in FIG. 16, the illuminating device 1 using such a light flux controlling member 3 suppresses the illuminance in the forward direction as compared with the light distribution characteristic (see FIG. 6) of the illuminating device 1 according to the first embodiment. Except for this point, the light distribution characteristics are almost the same as those of the illumination device 1 of the first embodiment (FIG. 7).
The same light distribution characteristic as that of the lighting device 1 according to the first embodiment can be obtained. In the light flux controlling member 3 according to the present embodiment, the transmission / reflection film 13 is formed on the inner surface 10 of the lid 8 so that the reflectance of the transmission / reflection film 13 is 75%.

(6th Embodiment of a light beam control member and an illuminating device)
FIG. 17 shows a sixth embodiment of the light flux controlling member 3 and the illumination device 1 according to the present invention. The light flux control member 3 and the illumination device 1 according to the present embodiment are modifications of the light flux control member 3 and the illumination device 1 according to the fifth embodiment, and the light flux control member 3 and the illumination device according to the fifth embodiment. 1 are denoted by the same reference numerals, and descriptions that overlap the descriptions of the light flux controlling member 3 and the illumination device 1 according to the fifth embodiment are omitted.

The light flux control member 3 shown in FIG. 17 removes the lid portion 8 of the light flux control member 3 shown in FIG. 15 by cutting along a virtual plane orthogonal to the optical axis L, and the outer surface 14 of the lid portion 8 is orthogonal to the optical axis L. The height dimension (dimension along the optical axis L) can be made smaller than the light flux controlling member 3 shown in FIG. Moreover, the illuminating device 1 which uses the light beam control member 3 which concerns on such this embodiment can acquire the effect similar to the illuminating device 1 which concerns on 5th Embodiment.

(7th Embodiment of a light beam control member and an illuminating device)
FIG. 18 shows a seventh embodiment of the light flux controlling member 3 and the illumination device 1 according to the present invention. The light flux control member 3 and the illumination device 1 according to the present embodiment are modifications of the light flux control member 3 and the illumination device 1 according to the first embodiment, and the light flux control member 3 and the illumination device according to the first embodiment. 1 are denoted by the same reference numerals, and descriptions that overlap with the descriptions of the light flux controlling member 3 and the illumination device 1 according to the first embodiment are omitted.

The light flux controlling member 3 shown in FIG. 18 is obtained by deforming the side wall portion 6 of the light flux controlling member 3 according to the first embodiment. That is, the light flux controlling member 3 according to the present embodiment is such that the inner diameter of the lower end 5 of the side wall portion 6 is larger than the inner diameter of the connecting portion between the side wall portion 6 and the lid portion 8 (the outer peripheral portion 12 of the lid portion 8). The side wall portion 6 has a tapered shape. The light flux controlling member 3 having such a shape can be easily released from the mold during injection molding. Moreover, the illuminating device 1 using such a light beam control member 3 can acquire the effect similar to the illuminating device 1 of 1st Embodiment.

(Eighth Embodiment of Light Beam Control Member and Lighting Device)
FIG. 19 shows an eighth embodiment of the light flux controlling member 3 and the illumination device 1 according to the present invention. The light flux control member 3 and the illumination device 1 according to the present embodiment are modifications of the light flux control member 3 and the illumination device 1 according to the first embodiment, and the light flux control member 3 and the illumination device according to the first embodiment. 1 are denoted by the same reference numerals, and descriptions that overlap with the descriptions of the light flux controlling member 3 and the illumination device 1 according to the first embodiment are omitted.

The light flux controlling member 3 shown in FIG. 19 is fitted into an annular recess 20 in which the outer peripheral end side of the lid portion 8 is formed at the upper end portion of the side wall portion 6 after the side wall portion 6 and the lid portion 8 are separately formed. Fix (adhesion, welding, etc.)
The side wall portion 6 and the lid portion 8 are integrated. The side wall portion 6 has an outer surface such as a rounded sphere so that the inner diameter on the lower end 5 side is smaller than the inner diameter on the upper end side (the connection portion with the lid portion 8 and the outer peripheral portion 12 of the lid portion 8). It is a diameter-shaped cylindrical body.

Further, the light flux controlling member 3 is fixed (adhered, welded, etc.) to the other end (upper end) 7 of the side wall portion 6 with the open end 22 of the cover 21 having a hemispherical outer shape (a shape in which a hollow sphere is halved). ) And the lid 8
The outer surface 14 is covered with a cover 21 through an air layer. The light flux controlling member 3 has a shape in which the entire outer shape is cut out of a part of a sphere. Cover 21 is
The side wall portion 6 and the lid portion 8 are formed of the same material that transmits light. The inner peripheral surface 23 of the opening end 22 of the cover 21 is fitted to the outer peripheral surface 24 of the lid portion 8. The cover 21 is
In order to improve light diffusibility, it may be formed of a material mixed with a light scatterer. Also, the cover 21
May improve the light diffusion performance by roughening at least one of the outer surface and the inner surface. Moreover, the cover 21 does not need to give a light-diffusion function.

As illustrated in FIG. 20, the lighting device 1 according to the present embodiment includes the lighting device 1 according to the first embodiment.
Compared with the light distribution characteristic of the first embodiment (see FIG. 6), the light distribution characteristic is almost the same as that of the lighting device 1 of the first embodiment, except that the illuminance in the forward direction is suppressed and the illuminance in the horizontal direction is increased. Thus, the same effect as that of the lighting device 1 of the first embodiment can be obtained. Note that the light flux controlling member 3 according to the present embodiment has the transmissive reflective film 13 as the lid portion 8 so that the reflectance of the transmissive reflective film 13 is 75%.
Is formed on the inner surface 10. Moreover, the side wall part 6 and the cover 21 are formed so that it may become the same thickness except for the part fixed to each other and its vicinity.

(Ninth Embodiment of Light Beam Control Member and Lighting Device)
FIG. 21 shows a ninth embodiment of the light flux controlling member 3 and the illumination device 1 according to the present invention. The light flux control member 3 and the illumination device 1 according to the present embodiment are a first modification of the light flux control member 3 and the illumination device 1 according to the eighth embodiment, and the light flux control member 3 according to the eighth embodiment. The same components as those of the illumination device 1 are denoted by the same reference numerals, and the description of the light flux controlling member 3 and the illumination device 1 according to the eighth embodiment is omitted.

21 makes the curvature of the cover 21 smaller than the curvature of the cover 21 shown in FIG. 19, and has a height dimension (along the optical axis L) than the light flux control member 3 shown in FIG. Size)
Is made smaller.

As shown in FIG. 22, the lighting device 1 according to this embodiment is a lighting device 1 according to the first embodiment.
Compared to the light distribution characteristic (see FIG. 6), the light distribution characteristic is almost the same as that of the lighting device 1 of the first embodiment, except that the illuminance from the lateral direction to the forward direction is substantially the same. Thus, the same effect as the lighting device 1 of the first embodiment can be obtained. In the light flux controlling member 3 according to the present embodiment, the transmissive reflection film 13 is the inner surface 1 of the lid portion 8 so that the reflectance of the transmissive reflection film 13 is 75%.
0 is formed.

(10th Embodiment of a light beam control member and an illuminating device)
Fig.23 (a) is a figure which shows 10th Embodiment of the light beam control member 3 and the illuminating device 1 which concern on this invention. Moreover, FIG.23 (b) is a top view of the board | substrate 4 which comprises the illuminating device 1 which concerns on this embodiment. The light flux control member 3 and the illumination device 1 according to the present embodiment are a second modification of the light flux control member 3 and the illumination device 1 according to the eighth embodiment, and the light flux control member 3 according to the eighth embodiment. The same components as those of the illumination device 1 are denoted by the same reference numerals, and the description of the light flux controlling member 3 and the illumination device 1 according to the eighth embodiment is omitted.

The light flux controlling member 3 shown in FIG. 23A is the same as the light flux controlling member 3 according to the eighth embodiment shown in FIG. Moreover, the illuminating device 1 shown to Fig.23 (a) is 8th shown in FIG.
The illumination device 1 according to the embodiment is different from that in which the single light emitting element 2 is mounted on the substrate 4, but a plurality of light emitting elements 2 are mounted on the substrate 4. To do.

That is, as shown in FIG. 23B, on the substrate 4 of the lighting device 1 according to the present embodiment,
A plurality of light emitting elements 2 are arranged on the same circle 25 at equal intervals (a total of eight elements are arranged at 45 ° intervals). The center L of the luminous fluxes of the plurality of light emitting elements 2 is the center of the total outgoing luminous flux obtained by collecting the three-dimensional outgoing luminous fluxes of the respective light emitting elements 2, and the optical axis of the single light emitting element 2 in the eighth embodiment. It corresponds to the position of L (the center position of the light beam) and matches the central axis L1 of the light beam control member 3.

As shown in FIG. 24, the illuminating device 1 according to the present embodiment has an illuminance from the lateral direction to the front direction as compared with the light distribution characteristics (see FIG. 20) of the illuminating device 1 according to the eighth embodiment. Can be made more uniform and closer to the light distribution characteristics of the incandescent light bulb, and the same effect as the lighting device 1 according to the first embodiment can be obtained. In the light flux controlling member 3 according to the present embodiment, the transmission / reflection film 13 is formed on the inner surface 10 of the lid 8 so that the reflectance of the transmission / reflection film 13 is 75%.

(11th Embodiment of a light beam control member and an illuminating device)
Fig.25 (a) is a figure which shows 11th Embodiment of the light beam control member 3 and the illuminating device 1 which concern on this invention. Moreover, FIG.25 (b) is a top view of the board | substrate 4 which comprises the illuminating device 1 which concerns on this embodiment, and is a figure similar to the top view of the board | substrate 4 shown in FIG.23 (b). FIG. 26 shows a light flux controlling member 3 according to the eleventh embodiment of the present invention. Note that the light flux controlling member 3 and the lighting device 1 according to the present embodiment are the light flux controlling member 3 and the lighting device 10 according to the tenth embodiment.
The components common to the light beam control member 3 and the illumination device 1 according to the tenth embodiment are denoted by the same reference numerals, and the description of the light beam control member 3 and the illumination device 1 according to the tenth embodiment. A duplicate description will be omitted.

As shown in FIG. 25A and FIG. 26, the light flux controlling member 3 is formed from the center of the light flux controlling member main body 26 and the inner surface 10 of the light flux controlling member main body 26 (the inner surface 10 facing the light emitting element 2). And a support portion 27 extending downward (along the central axis L1). The light flux controlling member 3 according to the present embodiment does not have a configuration corresponding to the side wall portion 6 of the light flux controlling member 3 according to the first embodiment and the side wall portion 6 of the light flux controlling member 3 according to the tenth embodiment. (See FIGS. 1 and 23).

As shown in FIGS. 25A and 26, the support portion 27 of the light flux controlling member 3 has a cylindrical shape, and its front end surface (lower end surface) 27a is fixed to the substrate 4 (adhesion, screwing, press fitting, etc.). Then, the light flux controlling member main body 26 is supported on the substrate 4 so that the central axis L1 of the light flux controlling member 3 matches the center L of the light flux of the plurality of light emitting elements 2.

As shown in FIGS. 25A and 26, the light flux controlling member main body 26 of the light flux controlling member 3 is
The shape is the same as the shape of the lid portion 8 of the light flux controlling member 3 according to the first embodiment except that the support portion 27 is integrally formed at the center of the inner surface 10 (see FIGS. 1 and 2). ). Also,
The inner surface 10 of the light flux controlling member main body 26 is formed with a transmissive reflecting film 13 as in the case of the lid portion 8 of the light flux controlling member 3 according to the first embodiment except for the portion where the support 27 is formed. . Further, the outer surface 14 of the light flux controlling member main body 26 has a front-back relationship with the inner surface 10 and is formed in the same manner as the outer surface 14 of the lid portion 8 of the light flux controlling member 3 according to the first embodiment.

As shown in FIG. 25, in the lighting device 1 according to the present embodiment, the opening end 22 of the cover 21 having a shape obtained by cutting out a part of a hollow sphere is fixed to the outer peripheral end of the disc-shaped substrate 4. , Cover 21
A plurality of light emitting elements 2 and a light flux controlling member 3 are accommodated in a space 28 sealed with the substrate 4. In the light flux controlling member 3, a gap 30 is formed between the outer peripheral end (outer peripheral portion) of the light flux controlling member main body 26 and the cover 21, and the support portion 27 is directly fixed to the substrate 4. According to the illuminating device 1 having such a configuration, as compared with the illuminating device 1 according to the tenth embodiment, it is possible to reduce the number of assembling steps by a smaller number of parts, and to improve the production efficiency.

As shown in FIG. 27, the lighting device 1 according to this embodiment can obtain the same light distribution characteristics as the light distribution characteristics (see FIG. 24) of the lighting device 1 according to the tenth embodiment. The same effects as those of the lighting device 1 according to the first embodiment can be obtained. In the light flux controlling member 3 according to the present embodiment, the transmissive reflecting film 13 is formed on the inner surface 10 of the light flux controlling member main body 26 so that the reflectance of the transmissive reflecting film 13 is 75%.

(Twelfth Embodiment of Light Beam Control Member and Lighting Device)
FIG. 28 is a diagram showing a twelfth embodiment of the light flux controlling member 3 and the lighting device 1 according to the present invention. In the illumination device 1 according to the present embodiment, the plurality of light emitting elements 2 and the light flux controlling member 3 in the eleventh embodiment are used as one “light emitting element-light flux controlling member” unit 31, and this “light emitting element—light flux controlling member” unit. A plurality of 31 are mounted on one substrate 32, the open end 34 of the cover 33 is fixed to the outer peripheral edge of the substrate 32, and a plurality of “s” is placed in a space 35 sealed by the substrate 32 and the cover 33.
The light emitting element-light flux controlling member unit 31 is accommodated. The surface of the substrate 32 on which the light emitting element 2 is mounted is covered with a light reflecting member (not shown) having an excellent light reflecting function,
Or you may make it arrange | position the light reflection member (not shown) excellent in the light reflection function. In addition, the XX cross section of the illuminating device 1 which concerns on this embodiment is the same as that of Fig.25 (a). Also, the substrate 32
And the planar shape of the illuminating device 1 formed with the cover 33 can be made into the optimal shape according to a use application, such as circular, a rectangular shape, and a hexagonal shape. Such a lighting device 1 according to the present embodiment
The light distribution characteristic of the illumination light can be brought close to the light distribution characteristic of the incandescent bulb, and high-quality illumination light without color unevenness can be emitted.

(Modification)
In each of the above embodiments, the transmission / reflection film 13 is formed on the inner surface 10 of the light flux controlling member 3. However, the present invention is not limited to the above embodiments, and the transmission / reflection film 13 may be formed on the outer surface 14 of the light flux controlling member 3. That is, the transmission / reflection film 13 of the light flux controlling member 3 according to the present invention is formed on a surface (any one of the inner surface 10 and the outer surface 14) that intersects with a part of the emitted light of the light emitting element 2. The light distribution characteristics can be obtained. However, in order to suppress the optical loss by reducing the interface in the optical path of the reflected light, the inner surface 10 of the light flux controlling member main body portion.
It is better to form the transmission reflection film 13 on the surface. The transmission / reflection film 13 formed on the inner surface 10 can suppress damage and peeling due to handling of the light flux controlling member 3 and the like.

The luminous flux control member according to the present invention and the lighting device using the luminous flux control member are used in place of the incandescent bulb if the reflectance of the transmissive reflection film of the luminous flux control member is determined to have a desired light distribution characteristic. The present invention is not limited to this case, and can be widely used as a part of a chandelier, an indirect lighting device, or the like.

DESCRIPTION OF SYMBOLS 1 ... Illuminating device, 2 ... Light emitting element (for example, LED), 3 ... Light flux controlling member, 4, 32
...... Substrate, 5 ... one end, 6 ... side wall, 7 ... other end, 8 ... lid, 10 ... inner surface, 11 ...
... central part, 12 ... outer peripheral part, 13 ... transflective film, 14 ... outer surface, 17 ... inner peripheral surface, 18
... outer peripheral surface, L ... optical axis (center of light flux), L1 ... central axis

Claims (12)

A light flux controlling member disposed so that a central axis is positioned concentrically with a center of a light flux of one or a plurality of light emitting elements mounted on a substrate, and disposed via the light emitting element and an air layer,
A transmission reflection film is formed on a surface intersecting with a part of the emitted light of the emitted light of the light emitting element,
The surface intersecting with the part of the emitted light is such that the central portion located on the central axis is more than the outer peripheral portion.
It is a concave surface that is arranged at a position close to the optical element, and is directed from the central portion toward the outer peripheral portion.
And has a concave surface with a gentle slope
The transmission reflective film further reflects a part of the part of the emitted light and transmits the remaining part of the part of the emitted light.
A light flux controlling member characterized by the above. The central axis is located concentrically with the center of the luminous flux of one or a plurality of light emitting elements mounted on the substrate.
And a light flux controlling member disposed via the light emitting element and an air layer,
A transmission reflection film is formed on a surface intersecting with a part of the emitted light of the emitted light of the light emitting element,
The surface intersecting with the part of the emitted light is such that the central portion located on the central axis is more than the outer peripheral portion.
It is a concave surface that is arranged at a position close to the optical element, and is directed from the central portion toward the outer peripheral portion.
And has a curved surface with a gentler inclination, between the center and the outer periphery, and
A shape where a point where the inclination angle becomes zero occurs at a position close to the outer peripheral part,
The transmissive reflective film further reflects a part of the part of the emitted light and leaves the remaining part of the emitted light.
Through the part ,
A light flux controlling member characterized by the above . Arranged so that the central axis is located concentrically with the center of the luminous flux of multiple light-emitting elements mounted on the substrate
And a light flux controlling member disposed via the light emitting element and an air layer,
A support fixed on the substrate on a surface that intersects a part of the emitted light of the light emitting element.
The part is formed concentrically with the central axis,
The surface intersecting with the part of the emitted light is such that the central portion located on the central axis is more than the outer peripheral portion.
It is a concave surface that is arranged at a position close to the optical element, and is directed from the central portion toward the outer peripheral portion.
A concave-convex surface with a gentle slope as it goes, and a transmission-reflection film on a portion surrounding the support portion
Formed,
The transmissive reflective film further reflects a part of the part of the emitted light and leaves the remaining part of the emitted light.
Through the part,
A light flux controlling member characterized by the above . Arranged so that the central axis is located concentrically with the center of the luminous flux of multiple light-emitting elements mounted on the substrate
And a light flux controlling member disposed via the light emitting element and an air layer,
A support fixed on the substrate on a surface that intersects a part of the emitted light of the light emitting element.
The part is formed concentrically with the central axis,
The surface intersecting with the part of the emitted light is such that the central portion located on the central axis is more than the outer peripheral portion.
It is a concave surface that is arranged at a position close to the optical element, and is directed from the central portion toward the outer peripheral portion.
And has a concave surface with a gentler slope, and is between the central portion and the outer peripheral portion, and
The point where the inclination angle becomes zero is formed at a position near the outer peripheral part, and the support part is removed.
A transmission reflection film is formed on the surrounding part,
The transmissive reflective film further reflects a part of the part of the emitted light and leaves the remaining part of the emitted light.
Through the part,
A light flux controlling member characterized by the above . The transmissive reflective film is formed on an inner surface facing the light emitting element;
The outer surface, which has a back-and-front relationship with the inner surface, transmits light that has passed through the transmissive reflection film and is incident on the outer surface.
Emanating toward
The light flux controlling member according to claim 1 , wherein the light flux controlling member is provided. The light emitting element and the light emitting element so that a central axis is positioned concentrically with the optical axis of the light emitting element mounted on the substrate.
A lid portion disposed through the air layer and formed to intersect the optical axis;
A side wall extending from the outer edge of the lid to the substrate side;
A light flux controlling member having
As for the inner surface of the said cover part, the center part located on the said central axis is closer to the said light emitting element than an outer peripheral part
A concave surface arranged at a position and from the center to the outer periphery.
And has a concave surface with a gentle slope and is covered with a transmissive reflective film,
The transmission / reflection film reflects a part of the light from the light emitting element toward the side wall portion, and emits the light.
Transmits the remainder of the light from the optical element,
The outer surface of the lid part emits light incident through the transmission / reflection film to the outside of the lid part,
The side wall portion is reflected by the transmissive reflection film and reaches the inner peripheral surface from the light emitting element.
The light directly reaching the inner peripheral surface is emitted outward from the outer peripheral surface,
A light flux controlling member characterized by the above . The light emitting element and the light emitting element so that a central axis is positioned concentrically with the optical axis of the light emitting element mounted on the substrate.
A lid portion disposed through the air layer and formed to intersect the optical axis ;
A side wall extending from the outer edge of the lid to the substrate side ;
A light flux controlling member having
As for the inner surface of the said cover part, the center part located on the said central axis is closer to the said light emitting element than an outer peripheral part
A concave surface arranged at a position and from the center to the outer periphery.
And having a concave surface with a gentle slope, between the central portion and the outer peripheral portion and the outer peripheral portion.
It is a shape where a point where the inclination angle becomes zero occurs at a position close to, and is covered with a transmission / reflection film,
The transmission / reflection film reflects a part of the light from the light emitting element toward the side wall portion, and emits the light.
Transmits the remainder of the light from the optical element,
The outer surface of the lid part emits light incident through the transmission / reflection film to the outside of the lid part,
The side wall portion is reflected by the transmissive reflection film and reaches the inner peripheral surface from the light emitting element.
The light directly reaching the inner peripheral surface is emitted outward from the outer peripheral surface,
A light flux controlling member characterized by the above . The light flux control unit according to claim 6 or 7, wherein an inner surface of the lid part is aspherical.
Wood. The outer peripheral surface of the side wall portion is a light diffusing surface, according to any one of claims 6 to 8.
The luminous flux control member. The outer surface of the lid portion is a light diffusion surface, according to any one of claims 6 to 9.
Luminous flux control member. The lid portion and the side wall portion are formed of a material having a light scattering ability.
The light flux controlling member according to claim 6. A substrate on which the light-emitting element is mounted, and light emitted from the light-emitting element is fixed on the substrate.
And a light flux controlling member according to any one of claims 1 to 11.
apparatus.

Images