WO2019142386A1

WO2019142386A1 - Lighting device, sign board, show case and security lighting

Info

Publication number: WO2019142386A1
Application number: PCT/JP2018/031583
Authority: WO
Inventors: 尾山　和也
Original assignee: シャープ株式会社
Priority date: 2018-01-16
Filing date: 2018-08-27
Publication date: 2019-07-25
Also published as: JPWO2019142386A1; CN111630314A

Abstract

The objective of the invention is to produce a lighting device having excellent light distribution properties at low cost. This lighting device is equipped with a light-emitting unit 11 having an LED (21) and a light source cover (23). The light-emitting unit (11) is such that, for the luminous flux emitted from the surface of the light source cover (23), the ratio between the forward direction and the horizontal direction of the LED (21) horizontal/vertical is 1 or greater. This lighting device is equipped with a reflective plate 12 reflecting light emitted in the backward direction of the light-emitting unit (11).

Description

Lighting equipment, billboards, showcases and security lights

The present invention relates to a lighting device using a light emitting diode as a light source, a signboard, a showcase and a crime prevention light.

2. Description of the Related Art Conventionally, as a light source of a lighting device, a light emitting diode (hereinafter referred to as an LED) has been used in place of a fluorescent lamp or an incandescent lamp because of low power consumption, high luminance and long life.

FIG. 61 is an explanatory view showing a light distribution state of the LED substrate 303. As shown in FIG. 62 is an explanatory view showing a light distribution state of a conventional light source unit 305 formed by covering the LED substrate 303 shown in FIG. 61 with a milky white tubular or spherical light source cover 304, for example.

As shown in FIG. 61, the LED 301 is usually attached to one surface of the substrate 302 and configured as the LED substrate 303, and the light just horizontal to the position of the LED 301 is zero, and the light distribution relatively forward. Has a large light distribution characteristic. This is because the LED 301 has directivity while the fluorescent lamp and the incandescent lamp do not have directivity. Further, as shown in FIG. 62, the light source unit 305 formed by covering the LED substrate 303 with, for example, a milky white tubular or spherical light source cover 304 has the light source cover 304 so that it is viewed from the center of the light source unit 305. The light distribution characteristic is such that the light distribution is slightly expanded in the lateral direction as compared with the case of the LED 301 alone.

Here, the illumination device having the light distribution characteristic as shown in FIG. 61 or 62 does not cause any particular problem when it is used as a general illumination device that illuminates one direction such as the lower side. In fact, the above-mentioned conventional lighting device is often used as a lighting device which narrows light and illuminates one direction in combination with an umbrella-like reflecting member.

On the other hand, for example, as a lighting device provided in a signboard or a showcase, a lighting device having a light distribution characteristic with a relatively large light distribution in the lateral direction is preferable. Therefore, the illumination device having the light distribution characteristic as shown in FIG. 61 or 62 is likely to cause graininess, glare and light unevenness of the light source, and is not suitable for the use as described above.

Therefore, in the configuration described in Patent Document 1, when a plurality of LEDs are provided, light distribution in the lateral direction relative to the front is achieved by individually covering each of the LEDs with the wavelength conversion member containing the phosphor. To make it bigger.

In the configuration described in Patent Document 2, when a plurality of LEDs are provided, the light from the light source is spread in the lateral direction by individually covering each LED with a lens.

In the configuration described in Patent Document 3, a plurality of supports having a plurality of slopes are provided on a substrate, a scattering plate is provided to be opposed to the substrate, and a light flux is obtained by attaching LED elements to each slope of the support. It spreads in a plane, and the diffuser makes the orientation distribution uniform.

Japanese Patent Publication "Japanese Patent Application Laid-Open No. 2012-231036" International Publication Publication "WO 2012/164790" Japanese Patent Publication No. 2012-174625

However, in the configuration described in Patent Document 1, when the lighting device has a plurality of LEDs, each LED is individually covered by the wavelength conversion member, so the number of manufacturing steps in manufacturing the lighting device increases. In addition, since the cost of parts is increased, the cost of the lighting apparatus is increased.

Further, in the configuration described in Patent Document 2, when the lighting device has a plurality of LEDs, since each LED is individually covered with a lens, the number of manufacturing steps in the case of manufacturing the lighting device increases similarly. Since the cost of parts increases, the cost of the lighting apparatus is increased. In addition, since one set of the combination of the lens and the LED individually becomes a point light source, it is extremely dazzling when the lighting device is viewed directly.

Further, in the configuration described in Patent Document 3, since the LED elements are attached to the respective slopes of the plurality of supports, the number of manufacturing steps for manufacturing the lighting device increases, and the parts cost increases. , To increase the cost of lighting equipment.

Therefore, one aspect of the present invention aims to provide a low cost lighting device, a signboard, a showcase and a security light, which has good light distribution characteristics using LEDs.

In order to solve the above-mentioned subject, a lighting installation concerning one mode of the present invention is a lighting installation provided with LED which is a light source, and a light emission part which has a light source cover which covers LED. The ratio of the frontward direction, which is the direction in which the light distribution of the LED is the strongest, to the lateral direction orthogonal to the frontward direction of the light flux emitted from the surface of the light source cover is 1 or more. A reflecting member is provided on a surface opposite to the front direction, and reflects a light emitted from the light emitting unit to the back direction of the light emitting unit.

According to one aspect of the present invention, with a simple configuration, it is possible to manufacture a lighting device having good light distribution characteristics using an LED as a light source and at low cost.

It is a longitudinal section which shows the composition of the lighting installation of the embodiment of the present invention. (A) of FIG. 2 is an explanatory view showing a light distribution state of the light emitting part in a state where there is no reflection plate in the lighting device shown in FIG. 1, and (b) of FIG. 2 is shown in (a) of FIG. It is a graph which shows the light distribution characteristic of the light emission part. (A) of FIG. 3 is an explanatory view showing a light distribution state of the lighting device shown in FIG. 1, and (b) of FIG. 3 is a graph showing light distribution characteristics of the lighting device shown in FIG. It is a disassembled perspective view which has a structure of the illuminating device shown in FIG. 1, and has a LED board which provided several LED on the board | substrate. (A) of FIG. 5 is a perspective view of a light emitting portion and a reflector in a state in which the LED substrate shown in FIG. 4 is covered with a light source cover, and (b) of FIG. 5 is shown in (a) of FIG. (C) of FIG. 5 is a perspective view showing the lighting apparatus in a state in which the reflecting plate is attached to the back of the light emitting unit, and (d) of FIG. It is a longitudinal cross-sectional view of the illuminating device shown to c). FIG. 6A shows the case where the reflected light of the light emitted from the LED is incident on the eye in a state where the LED substrate of the lighting device shown in FIG. 5 is not covered by the light source cover and there is no reflector. Explanatory drawing and (b) of FIG. 6 are explanatory drawings in case the reflected light of the light radiate | emitted from the light emission part of the illuminating device shown in FIG. 5 injects into eyes. (A) of FIG. 7 is an explanatory view showing the configuration and light distribution state of the lighting device according to another embodiment of the present invention, and (b) of FIG. 7 is a layout of the lighting device shown in (a) of FIG. It is a graph which shows the light characteristic. FIG. 8 is an exploded perspective view showing the configuration of a lighting device having the configuration of the lighting device shown in (a) of FIG. 7 and having an LED substrate provided with a plurality of LEDs on the substrate. (A) of FIG. 9 is a perspective view of the light emitting portion and the reflection plate in a state in which the LED substrate shown in FIG. 8 is covered with a light source cover, and (b) of FIG. 9 is shown in (a) of FIG. FIG. 9C is a longitudinal sectional view of the lighting device shown in FIG. 9B, and FIG. 9C is a perspective view showing the lighting device with the reflection plate attached to the back surface of the light emitting unit. (A) of FIG. 10 is a perspective view of a signboard provided with the lighting apparatus shown in FIG. 9 in still another embodiment of the present invention, and (b) of FIG. 10 is shown in (a) of FIG. The longitudinal cross-sectional view which shows the attachment state of the illuminating device in the signboard, (c) of FIG. 10 is an illuminance distribution figure in the signboard shown to (a) of FIG. It is explanatory drawing which shows the light distribution state by the illuminating device in the longitudinal cross-section of the direction perpendicular | vertical to the backplate of the signboard shown in FIG. 10, and an upper surface board. (A) of FIG. 12 is a perspective view showing the configuration of a sign according to a comparative example to the sign shown in FIG. 10, (b) of FIG. 12 is an attached state of the light source portion in the sign shown in (a) of FIG. 12 (c) is an illuminance distribution diagram of the signboard shown in FIG. 12 (a). It is explanatory drawing which shows the light distribution state by the light source part in the longitudinal cross section of the direction perpendicular to the backplate of the signboard shown to (a) of FIG. 12, and an upper surface board. When the light source unit shown in FIG. 13 is provided and the case shown in FIG. 11 is replaced with the case shown in FIG. 12, the light source unit in the vertical cross section in the direction perpendicular to the back plate and top plate of the signboard It is explanatory drawing which shows a light distribution state. (A) of FIG. 15 is an explanatory view showing a light distribution state by the light source in a longitudinal cross section in a direction perpendicular to the back plate and the top plate of the signboard having the other conventional light source. It is an illuminance distribution figure in the signboard shown to (a) of FIG. (A) of FIG. 16 is a perspective view showing the configuration of a sign according to a comparative example to the sign shown in FIG. 10, and (b) of FIG. 16 is one light source part of the sign shown in (a) of FIG. 16 (c) is a longitudinal sectional view of the light source section shown in FIG. 16 (b), and FIG. 16 (d) is a perspective view of the light source section shown in FIG. 16 (c). Explanatory drawing which shows a light distribution state, (e) of FIG. 16 is a graph which shows the light distribution characteristic of the light source part shown to (c) of FIG. It is explanatory drawing which shows the light distribution state by the illuminating device in the longitudinal cross-section of the direction perpendicular to the backplate of the signboard shown to (a) of FIG. 16, and an upper surface board. FIG. 10 is a longitudinal cross-sectional view of a showcase provided with the lighting device shown in FIG. 9 therein according to still another embodiment of the present invention. It is a longitudinal cross-sectional view which shows the structure of the showcase concerning the comparative example with respect to the showcase shown in FIG. It is a longitudinal cross-sectional view which shows the structure of the showcase concerning the other comparative example with respect to the showcase shown in FIG. FIG. 10 is a cross-sectional view of a reach-in type showcase internally provided with the lighting device shown in FIG. 9 according to another embodiment of the present invention. It is a cross-sectional view which shows the structure of the showcase concerning the comparative example with respect to the showcase shown in FIG. It is a cross-sectional view which shows the structure of the showcase concerning the other comparative example with respect to the showcase shown in FIG. (A) of FIG. 24 is a perspective view of a state in which a crime prevention light using the lighting apparatus shown in FIG. 9 is attached to a columnar member, (b) of FIG. 24 is a crime prevention light shown in (a) of FIG. (C) of FIG. 24 is an illuminance distribution diagram of the crime prevention light shown in (a) of FIG. 24. FIG. (A) of FIG. 25 shows the light distribution characteristic of the lighting device of the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is 0 degree, the reflection surface of the reflection plate is a mirror surface, and the light emitting portion emits three lights. The graph which shows, (b) of FIG. 25 is a schematic diagram which shows the structure of the said illuminating device. In (a) of FIG. 26, the light distribution characteristics of the illumination device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -10 degrees, the reflection surface of the reflection plate is a mirror surface, and the light emitting unit has three-surface light emission. And FIG. 26B is a schematic view showing a configuration of the illumination device. FIG. 27 (a) shows the light distribution characteristics of the lighting device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -20 degrees, the reflection surface of the reflection plate is a mirror surface, and the light emitting unit has three-surface light emission. And FIG. 27 (b) is a schematic view showing the configuration of the illumination device. (A) of FIG. 28 shows the light distribution characteristics of the illumination device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -30 degrees, the reflection surface of the reflection plate is a mirror surface, and the light emitting unit has three-surface light emission. FIG. 28B is a schematic view showing the configuration of the illumination device. (A) of FIG. 29 shows the light distribution characteristic of the illumination device of the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is +10 degrees, the reflection surface of the reflection plate is a mirror surface, and The graph which shows, (b) of FIG. 29 is a schematic diagram which shows the structure of the said illuminating device. (A) of FIG. 30 shows the light distribution characteristic of the lighting apparatus of the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is +20 degrees, the reflection surface of the reflection plate is a mirror surface, and The graph which shows, (b) of FIG. 30 is a schematic diagram which shows the structure of the said illuminating device. FIG. 31 (a) shows the light distribution characteristics of the illumination device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is 0 degrees, the reflection surface of the reflection plate is a milky white surface, and the light emitting unit has three light emission. FIG. 31 (b) is a schematic view showing the configuration of the illumination device. FIG. 32 (a) shows the light distribution characteristics of the lighting device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -10 degrees, the reflection surface of the reflection plate is a milky white surface, and the light emitting unit has three light emission. FIG. 32 (b) is a schematic view showing the configuration of the illumination device. In (a) of FIG. 33, the light distribution of the illumination device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -20 degrees, the reflection surface of the reflection plate is a milky white surface, and The graph which shows a characteristic, (b) of FIG. 33 is a schematic diagram which shows the structure of the said illuminating device. In (a) of FIG. 34, the light distribution of the lighting device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -30 degrees, the reflection surface of the reflection plate is a milky white surface, and the light emitting unit has three light emission. The graph which shows a characteristic, (b) of FIG. 34 is a schematic diagram which shows the structure of the said illuminating device. FIG. 35 (a) shows the light distribution characteristic of the lighting device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is +10 degrees, the reflection surface of the reflection plate is a milky white surface, and And FIG. 35 (b) is a schematic view showing the configuration of the illumination device. In (a) of FIG. 36, the light distribution characteristic of the lighting device of the embodiment of the present invention in which the inclination angle of the reflecting surface of the reflecting plate is +20 degrees, the reflecting surface of the reflecting plate is a milky white surface, and the light emitting unit has three light emission. And FIG. 36 (b) is a schematic view showing the configuration of the illumination device. In (a) of FIG. 37, the light distribution characteristic of the lighting device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is 0 degree, the reflection surface of the reflection plate is a milky white surface, and FIG. 37B is a schematic view showing the configuration of the illumination device. In (a) of FIG. 38, the light distribution of the lighting device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -10 degrees, the reflection surface of the reflection plate is a milky white surface, and The graph which shows a characteristic, (b) of FIG. 38 is a schematic diagram which shows the structure of the said illuminating device. FIG. 39 (a) shows the light distribution of the lighting device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -20 degrees, the reflection surface of the reflection plate is a milky white surface, and the light emitting unit is dual emission. The graph which shows a characteristic, (b) of FIG. 39 is a schematic diagram which shows the structure of the said illuminating device. FIG. 40 (a) shows the light distribution of the illumination device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -30 degrees, the reflection surface of the reflection plate is a milky white surface, and The graph which shows a characteristic, (b) of FIG. 40 is a schematic diagram which shows the structure of the said illuminating device. In (a) of FIG. 41, the light distribution characteristic of the lighting device according to the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is +10 degrees, the reflection surface of the reflection plate is a milky white surface, and FIG. 41B is a schematic view showing the configuration of the illumination device. In (a) of FIG. 42, the light distribution characteristic of the lighting device of the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is +20 degrees, the reflection surface of the reflection plate is a milky white surface, and And FIG. 42B is a schematic view showing the configuration of the illumination device. FIG. 43 (a) shows an embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is 0 degree, the reflection surface of the reflection plate is a mirror surface, the light source cover has a mountain shape, and the light emitting unit has two-plane light emission. FIG. 43 is a graph showing the light distribution characteristic of the lighting device, and FIG. 43 (b) is a schematic view showing the configuration of the lighting device. (A) of FIG. 44 shows an embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -10 degrees, the reflection surface of the reflection plate is a mirror surface, the light source cover has a mountain shape, and the light emitting part has two-plane light emission. FIG. 44B is a schematic view showing the configuration of the lighting device. 45A shows an embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is −20 degrees, the reflection surface of the reflection plate is a mirror surface, the light source cover has a mountain shape, and the light emitting unit has two-surface light emission. 45 is a graph showing the light distribution characteristic of the lighting device, and FIG. 45 (b) is a schematic view showing a configuration of the lighting device. (A) of FIG. 46 shows an embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -30 degrees, the reflection surface of the reflection plate is a mirror surface, the light source cover has a mountain shape, and the light emitting unit has two facets emission. Fig. 46 (b) is a schematic view showing the configuration of the lighting device. FIG. 47 (a) shows an embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is +10 degrees, the reflection surface of the reflection plate is a mirror surface, the light source cover has a mountain shape, and the light emitting unit has two-plane light emission. The graph which shows the light distribution characteristic of an illuminating device, (b) of FIG. 47 is a schematic diagram which shows the structure of the said illuminating device. (A) of FIG. 48 shows an embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is +20 degrees, the reflection surface of the reflection plate is a mirror surface, the light source cover has a mountain shape, and the light emitting unit has two-plane light emission. The graph which shows the light distribution characteristic of an illuminating device, (b) of FIG. 48 is a schematic diagram which shows the structure of the said illuminating device. FIG. 49A shows an embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is 0 degree, the reflection surface of the reflection plate is a milky white surface, the light source cover has a mountain shape, and the light emitting unit has two-plane light emission. 43 is a graph showing the light distribution characteristic of the lighting device of FIG. 43, (b) of FIG. 43 is a schematic view showing a configuration of the lighting device. FIG. 50 (a) shows an embodiment of the present invention in which the inclination angle of the reflecting surface of the reflecting plate is -10 degrees, the reflecting surface of the reflecting plate is a milky white surface, the light source cover has a mountain shape, and the light emitting unit has two facets light emission. FIG. 50 is a graph showing the light distribution characteristic of the illumination device of the embodiment, and FIG. 50 (b) is a schematic view showing the configuration of the illumination device. FIG. 51 (a) shows an embodiment of the present invention in which the inclination angle of the reflecting surface of the reflecting plate is -20 degrees, the reflecting surface of the reflecting plate is a milky white surface, the light source cover has a mountain shape, and the light emitting unit has two facets light emission. FIG. 51 is a graph showing the light distribution characteristic of the illumination device of the embodiment, and FIG. 51 (b) is a schematic view showing the configuration of the illumination device. FIG. 52 (a) shows an embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is -30 degrees, the reflection surface of the reflection plate is a milky white surface, the light source cover has a mountain shape, and the light emitting unit has two-plane light emission. FIG. 52 is a graph showing the light distribution characteristic of the illumination device of the embodiment, and FIG. 52 (b) is a schematic view showing the configuration of the illumination device. FIG. 53 (a) shows an embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is +10 degrees, the reflection surface of the reflection plate is a milky white surface, the light source cover has a mountain shape, and the light emitting unit has two-plane light emission. Fig. 53 (b) is a schematic view showing the configuration of the illumination device. FIG. 54A shows an embodiment of the present invention in which the inclination angle of the reflecting surface of the reflecting plate is +20 degrees, the reflecting surface of the reflecting plate is a milky white surface, the light source cover has a mountain shape, and the light emitting unit has two-surface light emission. 54 is a graph showing the light distribution characteristic of the lighting device, and FIG. 54 (b) is a schematic view showing a configuration of the lighting device. FIG. 55 (a) shows the arrangement of the lighting device of the embodiment of the present invention in which the inclination angle of the reflecting surface of the reflecting plate is, for example, -10 degrees, the reflecting surface of the reflecting plate is a milky white surface, and the light emitting unit has three light emission. FIG. 55 (b) is a graph showing light distribution characteristics of the lighting device shown in FIG. 55 (a). (A) of FIG. 56 shows the configuration of the illumination device of the embodiment of the present invention in which the inclination angle of the reflection surface of the reflection plate is −20 degrees, the reflection surface of the reflection plate is a milky white surface, and the light emitting unit has three light emission. 56 (b) is an explanatory view showing a light distribution state of the lighting device shown in FIG. 56 (a), and FIG. 56 (c) is a lighting shown in FIG. 56 (a). It is a graph which shows the light distribution characteristic of an apparatus. (A) of FIG. 57 is an explanatory view showing a light distribution state of the lighting device of still another embodiment of the present invention, and (b) of FIG. 57 is a light distribution of the lighting device shown in (a) of FIG. It is a graph which shows a characteristic. It is a longitudinal cross-sectional view of a showcase provided with the illuminating device shown in FIG. (A) of FIG. 59 is an explanatory view showing, for example, the relationship between vertical and horizontal light beams emitted from the light emitting portion of the lighting apparatus shown in FIG. 5, and (b) of FIG. FIG. It is a schematic diagram which shows the modification of the reflecting plate which can be used for the illuminating device of embodiment of this invention, and a light emission part. It is explanatory drawing which shows the light distribution state of a LED board. FIG. 62 is an explanatory view showing a light distribution state of a conventional light source section formed by covering the LED substrate shown in FIG. 61 with a milky white tubular or spherical light source cover, for example.

Embodiment 1
Embodiments of the present invention will be described below based on the drawings. FIG. 1 is a longitudinal cross-sectional view showing the configuration of the lighting device of the present embodiment.

(Configuration of lighting device 1)
As shown in FIG. 1, the lighting device 1 of the present embodiment includes a light emitting unit 11 and a reflecting plate 12. The light emitting unit 11 includes an LED 21 which is a light source, a substrate 22 to which the LED 21 is attached, and a light source cover 23 which covers the LED 21.

The light source cover 23 is milky white, for example, and has a long rectangle in the forward direction of the LED 21 (the direction in which the light distribution of the LED 21 is the strongest). Therefore, the light emitting unit 11 is three-sided light emission in which the front surface and the left and right surfaces emit light. The material of the light source cover 23 is, for example, MKL-3500ZAL manufactured by Teijin Ltd. The same applies to the material of the light source cover of the other embodiments.

The reflecting plate 12 is provided on the rear surface of the LED 21, that is, the rear surface of the substrate 22, and reflects light traveling from the side surface of the light emitting unit 11 to the rear of the light emitting unit 11. Therefore, the surface of the reflecting plate 12 may be milky white, although a mirror surface is desirable. In the present embodiment, the reflecting plate 12 has a flat plate shape, and the reflecting surface of the reflecting plate 12 is perpendicular to the front-rear direction of the LED 21 (the direction in which the light distribution of the LED 21 is the strongest). It has become.

(Operation of lighting device 1)
(A) of FIG. 2 is an explanatory view showing a light distribution state of the light emitting unit 11 in a state without the reflection plate 12 in the illumination device 1 shown in FIG. 1, and (b) of FIG. 2 is (a) of FIG. It is a graph which shows the light distribution characteristic of the light emission part 11 shown to. (A) of FIG. 3 is an explanatory view showing a light distribution state of the lighting device 1 shown in FIG. 1, and (b) of FIG. 3 is a graph showing light distribution characteristics of the lighting device 1 shown in FIG. .

As shown in (a) of FIG. 2, the light emitting unit 11 covers the LED 21 with the light source cover 23 so that the light beam emitted in the forward direction of the LED 21 from the light source cover 23 emits in the lateral direction of the LED 21 The flux of light produced is greater. Thereby, although the light distribution characteristic of the light emitting part 11 is relatively stronger in the light distribution in the lateral direction than the light distribution in the front direction of the LED 21 as shown in FIG. The light is not very strong, and there is a light distribution in the back direction.

On the other hand, in the illumination device 1, the reflection plate 12 is provided, so that light directed to the rear direction of the light emitting unit 11 is reflected by the reflection plate 12 as shown in FIG. Thereby, as shown in (b) of FIG. 3, the light distribution characteristic of the lighting device 1 is relatively stronger in the light distribution in the lateral direction than the light distribution in the forward direction of the LED 21 and in the diagonally forward direction. The light is the strongest.

(Lighting device 31 having a plurality of LEDs)
Next, the illumination device 31 having the configuration of the illumination device 1 and having a plurality of LEDs 21 will be described. FIG. 4 is an exploded perspective view showing the configuration of the illumination device 31 having the configuration of the illumination device 1 and having the LED substrate 24 provided with the plurality of LEDs 21 on the substrate 22. As shown in FIG. (A) of FIG. 5 is a perspective view of the light emitting portion 11 and the reflecting plate 12 in a state in which the LED substrate 24 shown in FIG. 4 is covered by the light source cover 23, and (b) of FIG. 5C is a perspective view showing the illumination device 31 in a state where the reflection plate 12 is attached to the back surface of the light emission unit 11, and FIG. 5C is a sectional view of the light emission unit 11 and the reflection plate 12 shown in FIG. d) is a longitudinal cross-sectional view of the illuminating device 31 shown to (c) of FIG.

The illumination device 31 includes an LED substrate 24 in which a large number of LEDs 21 are provided in a row on an elongated substrate 22 as shown in FIGS. 4 and 5. The light emitting unit 11 is formed by covering the LED substrate 24 with a light source cover 23 having a rectangular longitudinal cross section, and is fixed to one surface (reflecting surface) of the reflecting plate 12.

(Advantages of lighting devices 1, 31)
As described above, in the

lighting devices

1 and 31, the light distribution in the lateral direction is relatively stronger than the light distribution in the forward direction of the LED 21, and the light distribution in the diagonal forward direction is the strongest. Thereby, when the

illumination devices

1 and 31 are disposed in, for example, a signboard or a showcase, it is possible to illuminate a wide area from the light distribution characteristic and to illuminate in a state with little uneven illuminance, and the graininess of the light source Because there is no or little, glare and light unevenness are less likely to occur and good illumination is possible. In addition, since the

lighting devices

1 and 31 have a simple configuration in which the reflection plate 12 is attached to the light emitting unit 11, the

lighting devices

1 and 31 can be easily manufactured and can be configured at low cost.

In addition, the

lighting devices

1 and 31 have the following advantages because the LEDs 21 are covered with the light source cover 23. FIG. 6A shows the case where the reflected light of the light emitted from the LED 21 is incident on the eye 25 in a state where the LED substrate 24 of the lighting device 31 is not covered by the light source cover 23 and the reflecting plate 41 is not present. FIG. 6B is an explanatory diagram of the case where the reflected light of the light emitted from the light emitting unit 11 of the illumination device 31 is incident on the eye 25. As illustrated in FIG.

As shown in FIG. 6A, for example, in the lighting device 31, when the LED substrate 24 is not covered by the light source cover 23, the outer surface 26 of the product is partially strongly illuminated by the LED 21. Therefore, when the light emitted from the LED 21 is reflected on the outer surface of the product 105 and enters the eye 25 of the user, the user easily feels glare, and it becomes difficult to see the characters of the product.

On the other hand, in the light emitting unit 11 of the lighting device 31, the LED substrate 24 is covered with the light source cover 23, and the surface of the light source cover 23 glows. In addition, light traveling in the backward direction is reflected by the reflection plate 12. Thereby, as shown in (b) of FIG. 6, the outer surface 26 of the product is almost uniformly illuminated by the lighting device 31. Therefore, even if the light emitted from the light emitting unit 11 is reflected on the outer surface of the product 105 and enters the eye 25 of the user, the user hardly feels glare and the characters of the product and the like are not easily seen.

Second Embodiment
Other embodiments of the present invention will be described below based on the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Configuration of lighting device 2)
Other embodiments of the present invention will be described below based on the drawings. (A) of FIG. 7 is an explanatory view showing the configuration and light distribution state of the lighting device 2 of the present embodiment, and (b) of FIG. 7 is a light distribution characteristic of the lighting device 2 shown in (a) of FIG. Is a graph showing In addition, in (a) of FIG. 7, the structure of the illuminating device 2 is shown with the longitudinal cross-section.

The illumination device 2 of the present embodiment includes a reflection plate 41 instead of the reflection plate 12 of the illumination device 1 as shown in (a) of FIG. 7. The other configuration is the same as that of the lighting device 1.

While the reflection plate 12 of the illumination device 1 has a flat plate shape (perpendicular to the front-rear direction of the LED 21 (the direction in which the light distribution of the LED 21 is the strongest and the opposite direction)), the reflection plate 41 of the illumination device 2 It has a shape along the rear of the direction perpendicular to the front direction of the LED 21 (the direction in which the light distribution of the LED 21 is the strongest). Specifically, the reflecting plate 41 has a shape bent rearward from a position corresponding to both end edges of the light source cover 23 on the reflecting plate 41 side.

Thereby, as shown in (b) of FIG. 7, the light distribution characteristic of the lighting device 2 is relatively similar to the light distribution in the forward direction of the LED 21 as in the case of the lighting device 1. Strong and diagonally forward light distribution is the strongest. In addition, the position of the maximum intensity of the light distribution in the diagonally forward direction is moved slightly to the rear side (lateral direction) than in the case of the lighting device 1.

(Lighting device 32 having a plurality of LEDs)
Next, the illumination device 32 having the configuration of the illumination device 2 and having a plurality of LEDs 21 will be described. FIG. 8 is an exploded perspective view showing the configuration of the illumination device 32 having the configuration of the illumination device 2 and having the LED substrate 24 provided with a plurality of LEDs 21 on the substrate 22. As shown in FIG. 9A is a perspective view of the light emitting unit 11 and the reflection plate 41 in a state in which the LED substrate 24 shown in FIG. 8 is covered by the light source cover 23, and FIG. (C) of FIG. 9 is a longitudinal cross-sectional view of the illuminating device 32 shown to (b) of FIG. 9 in the state which attached the reflecting plate 41 to this.

In the lighting device 32, as shown in FIGS. 8 and 9, the light emitting unit 11 is formed by covering the LED substrate 24 with the light source cover 23 having a rectangular longitudinal cross section, as in the lighting device 31. It is fixed to one side (reflection surface).

(Advantages of lighting devices 2 and 32)
As described above, in the

illumination devices

2 and 32, similarly to the illumination device 1, the light distribution in the lateral direction is relatively stronger than the light distribution in the forward direction of the LED 21, and the light distribution in the diagonal forward direction is the strongest. ing. Furthermore, the position of the maximum intensity of the light distribution in the oblique front direction is slightly moved to the rear side (lateral direction) as compared with the case of the lighting device 1.

Thus, as in the case of the

lighting devices

1 and 31, when the

lighting devices

2 and 32 are arranged in, for example, a signboard or a showcase, graininess of the light source, glare and light unevenness are less likely to occur, and good lighting is possible. Become. Moreover, since the illuminating

devices

2 and 32 are the simple structures which attached the reflecting plate 41 to the light emission part 11, they can be easily manufactured and can be set as the structure of low cost.

Third Embodiment
Further embodiments of the present invention will be described below on the basis of the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Composition of signboard 51)
Here, a configuration example of a signboard internally provided with the lighting device of the present embodiment will be described. 10A is a perspective view of a signboard provided with the lighting device 32 shown in FIG. 9, FIG. 10B is a longitudinal sectional view showing the mounting state of the lighting device 32 in the signboard 51, FIG. FIG. 10 (c) is an illuminance distribution diagram (in lux) in the signboard shown in FIG. 10 (a).

As shown in (a) of FIG. 10, the signboard 51 has a box-shaped case 52 having a rectangular parallelepiped shape. The vertical direction of the signboard 51 is the longitudinal direction or the short side direction of the housing 52 according to the use form of the signboard 51, but here, the lateral direction of the housing 52 will be described. The housing 52 has a shape in which the length in the lateral direction and the length in the vertical direction are larger than the length in the front-rear direction.

The housing 52 includes a back plate 52a, a front plate 52b, an upper plate 52c, a lower plate 52d, a right plate 52e, and a left plate 52f. The illumination device 32 is attached to the inside of the housing 52 at the center of the back plate 52a in a state where the longitudinal direction is along the longitudinal direction of the back plate 52a. As shown in (a) and (b) of FIG. 10, the lighting device 32 is fixed in a state in which the reflecting plate 41 is pressed against the back plate 52a by a fixing member 53 screwed to the back plate 52a.

(Operation and advantages of the lighting device 32 in the signboard 51)
FIG. 11 is an explanatory view showing a light distribution state by the illumination device 32 in a longitudinal cross section in a direction perpendicular to the back plate 52 a and the top plate 52 c of the signboard 51.

As shown in FIG. 11, in the light distribution characteristic of the lighting device 32, the light distribution in the lateral direction of the light source cover 23 is stronger than the light distribution in the forward direction of the light source cover 23 (forward direction of the LED 21). Light distribution is the strongest. This point is as described in detail in FIG. Therefore, even when the signboard 51 includes only one (one) lighting device 32, the upper region 52g2 corresponding to the upper portion of the front plate 52b is sufficiently bright, and the top plate 52c and the front plate 52b And the upper corner region 52g3 formed by the light source is bright. Further, the front area 52g1 corresponding to the front of the illumination device 32 in the front plate 52b is not particularly bright, and the unevenness of the brightness is reduced. As a result, the lighting device 32 can perform good illumination on the signboard 51 with less graininess of the light source, glare, and light unevenness. In addition, the state with few light unevenness of the signboard 51 is known also from the illuminance distribution shown to (c) of FIG.

Further, as described above, the lighting device 32 has a low cost configuration. In addition, the number of lighting devices 32 required for the signboard 51 may be small (one in the present embodiment), and the lighting devices 32 can be easily attached in the housing 52, and the number of wires can be reduced. Thereby, the signboard 51 can be manufactured easily and at low cost.

In addition, although this embodiment demonstrated the case where the signboard 51 was equipped with the illuminating device 32, the structure in which the signboard 51 was equipped with the illuminating device 31 may be sufficient. Even in this case, the same advantage is obtained. This point is the same as in the following other embodiments.

(Comparative example 1)
A comparative example of the signboard 51 shown in FIG. 10 will be described below. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Composition of signboard 61)
12A is a perspective view showing the configuration of a signboard 61 according to a comparative example with respect to the signboard 51 shown in FIG. 10, and FIG. 12B is a longitudinal sectional view showing the attachment state of the light source unit 305 in the signboard 61. (C) of FIG. 12 is an illuminance distribution diagram in the signboard 51 shown in (a) of FIG. In addition, (c) of FIG. 12 is shown from the same luminous flux as (a) of FIG.

As shown in (a) of FIG. 12, the sign 61 has a housing 62, and the light source unit 305 shown in FIG. 62 is attached inside the housing 62 instead of the illumination device 32 of the sign 51. ing. The housing 62 corresponds to the back plate 52a, the front plate 52b, the upper plate 52c, the lower plate 52d, the right plate 52e, and the left plate 52f of the casing 52, the back plate 62a, the front plate 62b, the upper plate 62c, and the lower plate 62d, a right side plate 62e and a left side plate 62f. The distance between the back plate 62 a and the front plate 62 b of the housing 62 is longer than the distance between the back plate 52 a and the front plate 52 b of the housing 52. The other dimensions of the housing 62 are similar to the dimensions of the housing 52.

The light source unit 305 includes the LED substrate 24 inside the tube-shaped light source cover 304 like the lighting device 32, and is disposed at the same position as the lighting device 32 of the signboard 51. The light source unit 305 is attached to the back plate 62a by a holder 63 provided on the back plate 62a, as shown in (a) and (b) of FIG.

(Operation of the

light source units

305 and 306 in the

signs

61, 71 and 81)
FIG. 13 is an explanatory view showing a light distribution state by the light source unit 305 in a longitudinal cross section in a direction perpendicular to the back plate 62 a and the top plate 62 c of the sign 61. 14 includes the light source unit 305, and the light source unit 305 in the vertical cross section in the direction perpendicular to the back plate 52a and the top plate 52c of the sign 71 when the same case 52 as the sign 51 is used instead of the case 62 It is explanatory drawing which shows a light distribution state.

In the light distribution characteristic of the light source unit 305, as shown in FIG. 62, the light distribution in the forward direction is stronger than the light distribution in the lateral direction when viewed from the center of the light source unit 305. Therefore, as shown in FIG. 13, the upper region 62g2 corresponding to the upper portion of the front plate 62b of the sign 61 and the upper region 62g3 corresponding to the upper plate 62c become dark. On the other hand, the front area 62g1 corresponding to the front of the light source unit 305 in the front plate 62b is particularly bright. For this reason, in the signboard 61, the unevenness of brightness (light unevenness) is large. The state in which the light unevenness of the signboard 61 is large can also be understood by comparing the illuminance distribution of the signboard 61 shown in (c) of FIG. 12 with the illuminance distribution of the signboard 51 shown in (c) of FIG.

Further, as shown in FIG. 14, in the signboard 71 provided with the light source unit 305 and using the case 52 instead of the case 62, the distance between the back plate 52a and the front plate 52b of the case 52 is the case The distance between the rear plate 62a and the front plate 62b is shorter than the distance between the rear plate 62a and the front plate 62b. Accordingly, the state in which the upper area 52g2 and the upper corner area 52g3 are dark and the front area 52g1 is particularly bright is more prominent than in the case of the sign 61. From the above results, it is inappropriate to use the light source unit 305 as a lighting device for a signboard.

In the configuration shown in FIG. 13, the light distribution state of the sign 81 provided with another conventional light source unit 306 instead of the light source unit 305 is as shown in FIG. FIG. 15 (a) is an explanatory view showing a light distribution state by the light source unit 306 in a longitudinal cross section in a direction perpendicular to the back plate 62a and the top plate 62c of the sign 81 provided with another conventional light source unit 306; (B) is an illuminance distribution chart in the signboard shown in (a) of FIG. (B) of FIG. 15 is shown by the same luminous flux as (a) of FIG. Like the light source unit 305, the light source unit 306 includes the LED substrate 24, and covers the LED substrate 24 with a transparent light source cover 307 which does not affect light distribution.

The light distribution characteristic of the light source unit 306 is the same as the light distribution characteristic of the LED 301, as shown in FIG. Therefore, the upper area 62g2 and the upper area 62g3 become darker and the front area 62g1 becomes brighter than the sign 61 provided with the light source unit 305. For this reason, the sign 81 is in a state in which the unevenness (brightness unevenness) of brightness is more than that of the sign 61. The state in which the light unevenness of the signboard 81 is even more can be understood by comparing the illuminance distribution of the signboard 81 shown in (b) of FIG. 15 with the illuminance distribution of the signboard 51 shown in (c) of FIG. .

(Comparative example 2)
Another comparative example of the signboard 51 shown in FIG. 10 will be described below. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Composition of signboard 91)
(A) of FIG. 16 is a perspective view showing the configuration of a sign 91 according to a comparative example of the sign 51 shown in FIG. 10, and (b) of FIG. 16 is a perspective view showing the configuration of one light source section 94 of the sign 91 16C is a longitudinal sectional view of the light source unit 94 shown in FIG. 16B, and FIG. 16D shows the light distribution state of the light source unit 94 shown in FIG. FIG. 16 (e) is a graph showing the light distribution characteristic of the light source section 94 shown in FIG. 16 (c).

As shown in (a) of FIG. 16, the sign 91 includes a housing 92, and the lighting device 93 is attached to the inside of the housing 92. The housing 92 includes a back plate 92a, a front plate 92b, an upper plate 92c, a lower plate 92d, a right plate 92e, and a left plate 92f.

The illumination device 93 has a configuration in which a large number of light sources 94 are connected in series, for example. The light source unit 94 has a substrate 95, an LED 97 provided on the substrate 95, and a lens 96 covering the LED 97, as shown in (b) and (c) of FIG. The configuration of the light source unit 94 corresponds to the configuration of the light emitting unit disclosed in Patent Document 2.

The light source unit 94 is fixed to the back plate 92 a by a screw 98 provided on the substrate 95, and the light source units 94 are connected to each other by a connector 99 of the substrate 95 and a wire 100 connected to the connector 99.

(Operation of the lighting device 93 in the sign 91)
FIG. 17 is an explanatory view showing a light distribution state by the lighting device 93 in a longitudinal cross section in a direction perpendicular to the back plate 92 a and the top plate 92 c of the sign 91.

The light distribution characteristic of the light source unit 94 is such that the light distribution in the lateral direction is stronger than the light distribution in the forward direction, as viewed from the center of the light source unit 94, as shown in (d) and (e) of FIG. Therefore, in the sign 91 shown in FIG. 17, the lighting device 93 can perform relatively good lighting with less unevenness in brightness.

However, since the light source unit 94 individually covers each of the LEDs 94 with a lens, the number of manufacturing steps for manufacturing the lighting device 93 is increased, and the cost of parts is increased. In addition, when the signboard 91 is provided with a large number of light source sections 94, attachment of the light source sections 94 and electrical connection between the light source sections 94 become complicated, and it takes a long time to manufacture the signboard 91. For this reason, the sign 91 becomes expensive.

Embodiment 4
Further embodiments of the present invention will be described below on the basis of the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Configuration of showcase 101)
Here, a configuration example of the showcase 101 provided with the lighting device 32 of the present embodiment will be described. FIG. 18 is a longitudinal sectional view of the showcase 101 including the lighting device 32 shown in FIG. 9 therein.

As shown in FIG. 18, the showcase 101 has a first shelf 102 in the first row from the bottom and a second shelf 103 in the second row from the bottom, and the upper plate portion 104 is positioned above the second shelf 103. Have. The first shelf 102, the second shelf 103, and the upper plate portion 104 are formed of, for example, an iron plate. A plurality of products 105 are disposed on the first shelf 102 and the second shelf 103. The first shelf 102, the second shelf 103, and the upper plate portion 104 have downward

bent portions

102a, 103a, 104a that are bent downward at the end on the near side (the product extraction side). In addition, only the downward bending portion 104a of the upper plate portion 104 is a light transmitting member, for example, a shade formed of a milky white translucent member, and is a place to be brightened to a customer.

A first lighting device 32 a for illuminating the product 105 on the first shelf 102 is provided on the lower surface of the second shelf 103, and a second illumination for illuminating the product 105 on the second shelf 103 is provided on the lower surface of the upper plate portion 104. A device 32b is provided. The first and

second lighting devices

32a and 32b are all the lighting devices 32 shown in FIG. 9 described above.

In the present embodiment, the first lighting device 32 a is disposed at the center in the front-rear direction of the lower surface of the second shelf 103, with the width direction of the first and

second shelves

102 and 103 as the longitudinal direction. The second lighting device 32b is disposed at a position on the product extraction side with respect to the central portion in the front-rear direction of the lower surface of the upper plate portion 104 with the width direction of the first and

second shelves

102 and 103 as the longitudinal direction.

(Operation and advantages of the lighting device 32 in the showcase 101)
As shown in FIG. 18, in the light distribution characteristic of the lighting device 32, as described above, the light distribution in the lateral direction of the light source cover 23 is stronger than the light distribution in the forward direction of the light source cover 23 (forward direction of the LED 21). And the light distribution in the diagonal forward direction is the strongest. Therefore, a single first lighting device 32a, that is, a small number of lighting devices 32, brightly illuminates the entire product on the first shelf 102 from the back product 105 on the first shelf 102 to the front product 105. it can. Moreover, the product 105 on the downward bending portion 104a of the upper plate portion 104 and the second shelf 103 can be brightly illuminated by one second illumination device 32b, that is, a small number of illumination devices 32. Thereby, the showcase 101 can be manufactured in a short time and at low cost.

In addition, the product 105 illuminated by the first and

second lighting devices

32a and 32b hardly suffers from uneven brightness, and it is difficult to produce a glaring feeling that only part of the showcase 101 becomes extremely bright. .

(Comparative example 3)
A comparative example of the showcase 101 shown in FIG. 18 will be described below. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Configuration of showcase 111)
FIG. 19 is a longitudinal cross-sectional view showing a configuration of a showcase 111 according to a comparative example to the showcase 101 shown in FIG.

As shown in FIG. 19, the showcase 111 is provided with a first light source unit 306 a that illuminates the product 105 on the first shelf 102 on the lower surface of the second shelf 103, and the upper plate portion under the upper plate portion 104. A second light source unit 306 b is provided which illuminates the lower bent portion 104 a of the display unit 104 from the inside of the showcase 111. The first light source unit 306a is disposed at a position closer to the product removal side than the central portion in the front and rear direction of the lower surface of the upper plate 104 with the width direction of the first and

second shelves

102 and 103 as the longitudinal direction. It is done. The second light source portion 306 b is a position facing the lower bent portion 104 a below the upper plate portion 104 with the width direction of the first and

second shelves

102 and 103 as the longitudinal direction. It is disposed at a position on the front side (the side from which the product is taken out) of the central portion in the front-rear direction. The first and second

light source units

306a and 306b are all the light source units 306 shown in FIG.

(Operation of the light source unit 306 in the showcase 111)
As described above, the first and second

light source units

306a and 306b have light distribution characteristics in which the light distribution in the forward direction is relatively larger than the light distribution in the lateral direction. The first light source unit 306 a illuminates only the product 105 on the near side (product extraction side) on the first shelf 102 and does not illuminate the product 105 on the back side brightly. In addition, the second light source unit 306 b brightly illuminates only the downward bending portion 104 a of the upper plate portion 104 and hardly illuminates the product 105 at the back of the second shelf 103. Such a problem also occurs when the light source unit 305 is used instead of the light source unit 306. Moreover, this point is the same also in the following other comparative examples which use the light source part 306 as an illuminating device.

(Comparative example 4)
Another comparative example of the showcase 101 shown in FIG. 18 will be described below. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Configuration of showcase 121)
FIG. 20 is a longitudinal sectional view showing the configuration of a showcase 121 according to another comparative example of the showcase 101 shown in FIG. The showcase 121 has a configuration in which the light source unit 306 is increased more than the showcase 111.

As shown in FIG. 20, in the showcase 121, a third light source unit 306c is provided on the lower surface of the second shelf 103 in addition to the first light source unit 306a, and a second light source unit 306b is provided under the upper plate unit 104. In addition to the above, a fourth light source unit 306d is provided.

The third light source unit 306 c is disposed behind the central portion in the front-rear direction of the lower surface of the second shelf 103 with the width direction of the first and

second shelves

102 and 103 as the longitudinal direction. The fourth light source unit 306 d is disposed at a central portion in the front-rear direction of the lower surface of the upper plate portion 104 with the width direction of the first and

second shelves

102 and 103 as the longitudinal direction.

(Operation of light source unit 306 in showcase 121)
In the showcase 121, by providing the first light source unit 306a and the third light source unit 306c on the lower surface of the second shelf 103, the product 105 on the front side (product extraction side) and the back side on the first shelf 102 is illuminated. be able to. In addition, by providing the second light source unit 306 b and the fourth light source unit 306 d under the upper plate portion 104, the downward bending portion 104 a of the upper plate portion 104 and the product 105 on the second shelf 103 can be illuminated. However, the brightness of the showcase 121 becomes uneven at the center in the front-rear direction on the second shelf 103 and the front and back sides when the fourth light source unit 306 d is illuminated. In addition, the showcase 121 requires a large number of light source units 306, which requires a long time for manufacturing and increases the cost.

Fifth Embodiment
Further embodiments of the present invention will be described below on the basis of the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Configuration of showcase 131)
Here, a configuration example of a reach-in type showcase 131 provided with the lighting device 32 of the present embodiment will be described. FIG. 21 is a cross-sectional view of a reach-in type showcase 131 including the illumination device 32 shown in FIG. 9 therein.

As shown in FIG. 21, the showcase 131 has four doors 132a to 132d on the front surface. The two

doors

132a and 132b on the left side and the two

doors

132c and 132d on the right side are opened outward by a double door. Of the four doors 132a to 132d, the outer two

doors

132a and 132d are connected to the left and right end edges of the front surface of the showcase 131 by hinges (not shown) provided at the end edges. The two

inner doors

132b and 132c are connected to a front pillar portion 133 provided at the center of the front surface of the showcase 131 by a hinge (not shown) provided at an end edge. The showcase 131 accommodates therein a large number of products 134 such as plastic bottles or tube drinks.

The illumination device 32 shown in FIG. 9 described above is provided on the inner surface of the front pillar portion 133 with the longitudinal direction as the vertical direction.

(Operation and advantages of the lighting device 32 in the showcase 131)
As shown in FIG. 21, as described above, the light distribution characteristic of the lighting device 32 is stronger in the lateral light distribution of the light source cover 23 than the light distribution in the forward direction of the light source cover 23 (the front direction of the LED 21) And the light distribution in the diagonal forward direction is the strongest. Therefore, one lighting device 32, that is, a small number of lighting devices 32, can efficiently illuminate the entire front-most horizontally aligned product 134 in the showcase 131. In this case, unevenness in brightness and glare of the product 134 are less likely to occur.

In addition, since one lighting device 32, that is, a small number of lighting devices 32 may be attached to the showcase 131, the showcase 131 can be manufactured in a short time and at low cost.

(Comparative example 5)
A comparative example of the showcase 131 shown in FIG. 21 will be described below. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Configuration of showcase 141)
FIG. 22 is a cross-sectional view showing a configuration of a showcase 141 according to a comparative example to the showcase 131 shown in FIG.

As shown in FIG. 22, the showcase 141 is provided with a light source unit 306 shown in FIG. 15 instead of the lighting device 32 shown in FIG. 21 as a lighting device. Similar to the showcase 131, the light source unit 306 is provided on the inner surface of the front pillar portion 133 with the longitudinal direction as the vertical direction. The other configuration of the showcase 141 is the same as that of the showcase 131.

(Operation of light source unit 306 in showcase 141)
As shown in FIG. 22, the light source unit 306 has a light distribution characteristic in which the light distribution in the forward direction is relatively larger than the light distribution in the lateral direction. Therefore, the light source unit 306 strongly illuminates only the product 134 in the central part among the products 134 in the front row in the showcase 141 and does not illuminate the products 134 other than the central part brightly. Therefore, in the front row of products 134, only the product 134 near the central part is brightly and dazzlingly illuminated, and the other products are dark.

(Comparative example 6)
Another comparative example of the showcase 131 shown in FIG. 21 will be described below. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Configuration of showcase 141)
FIG. 23 is a cross-sectional view showing a configuration of a showcase 151 according to a comparative example to the showcase 131 shown in FIG.

As shown in FIG. 23, the showcase 151 is provided with two light source units 306 shown in FIG. 15 instead of the lighting device 32 shown in FIG. 21 as lighting devices. Similar to the showcase 131, the two light source units 306 are provided on the inner surface of the front pillar portion 133 such that the longitudinal direction is the vertical direction. One of the two light source units 306 is disposed such that the strongest direction of light distribution is directed obliquely to the left front direction, and the other one is directed such that the strongest direction of light distribution is directed obliquely to the right front It is arranged. The other configuration of the showcase 151 is the same as that of the showcase 131.

(Operation of two light source units 306 in the showcase 151)
As shown in FIG. 23, the two light source units 306 illuminate the diagonal left front direction and the diagonal right front direction, respectively. The front row items 134 in the showcase 151 are generally brightly illuminated. However, in the showcase 151, since two light source units 306 are required, the number of manufacturing processes for manufacturing the showcase 151 is increased, the manufacturing time is extended, and the cost of parts is increased. In addition, since the two light source units 306 are disposed at an appropriate distance on the inner surface of the front pillar portion 133, the light source unit 306 can be easily seen from the outside of the showcase 151. For this reason, when selecting the product 134 of the showcase 151, the user feels glare.

Sixth Embodiment
Further embodiments of the present invention will be described below on the basis of the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Composition of crime prevention light 171)
Here, the structural example of the crime prevention light 171 using the illuminating device 32 of this embodiment is demonstrated. (A) of FIG. 24 is a perspective view of a state in which the crime prevention light 171 using the illumination device 32 shown in FIG. 9 is attached to the columnar member 172, (b) of FIG. 24 is an illumination device used for the crime prevention light 171 FIG. 24C is an illuminance distribution diagram of the crime prevention light 171. FIG.

The crime prevention light 171 using the lighting device 32 is attached to the top of the columnar member 172 with the light emitting unit 11 directed downward. In this embodiment, the crime prevention light 171, that is, the illumination device 32, is inclined 30 degrees with respect to the horizontal direction at a height of 4.5 m (the direction in which the light distribution of the LED 21 is strongest is 30 degrees with respect to the vertical direction It is attached to the columnar member 172 in the inclined state). The lighting device 32 may be covered with a transparent cover to prevent adhesion of dust, dirt, insects and the like.

(Operation and advantages of the lighting device 32 in the crime prevention light 171)
The crime prevention light 171 has a luminous flux 1500 lm which can be sufficiently realized at present with a power consumption of about 10 W, and in this case, has an illuminance distribution shown in FIG.

Here, when the LED substrate 24 shown in (a) of FIG. 9 is used as a crime prevention light without the light source cover 23 and the reflection plate 41 attached, the person who got the light from the crime prevention light is an individual The light from the LED 21 causes glare and glare occurs.

On the other hand, in the crime prevention light 171 using the lighting device 32, the light emitting portion 11 covering the LED substrate 24 with the light source cover 23 emits light, and the light from the light emitting portion 11 is reflected by the reflection plate 41 Even if the light from the crime prevention light 171 enters the eyes of a person, the person does not receive glare and glare is less likely to occur.

Seventh Embodiment
Further embodiments of the present invention will be described below on the basis of the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

Here, the light distribution characteristic of the illumination device 31 having the reflection plate 12 (the inclination angle of the reflection surface is 0 degree) as described above, the reflection surface of the reflection plate 12 is the mirror surface 12a, and the light emitting unit 11 has three-surface light emission. The light distribution characteristics of the illumination device 32 having the reflection plate 41 (having the inclination angle), the reflection surface of the reflection plate 41 having the mirror surface 41a, and the light emitting unit 11 emitting three lights will be described.

FIG. 25 (a) is a graph showing the light distribution characteristic of the illumination device 31 in which the inclination angle of the reflection surface is 0 degree, the reflection surface of the reflection plate 12 is the mirror surface 12a, and the light emitting unit 11 emits three lights. (B) is a schematic view showing the configuration of the illumination device 31.

The illumination device 31 illustrated in (b) of FIG. 25 is three-surface light emission in which the front surface and the left and right side surfaces of the light source cover 23 emit light. The reflection surface of the reflection plate 12 is perpendicular to the direction in which the light distribution of the LED 21 is the strongest (the angle to the direction in which the light distribution is the strongest is 90 degrees).

26A, the inclination angle of the reflection surface of the reflection plate 41 is -10 degrees (the angle to the direction in which the light distribution of the LED 21 is the strongest is 100 degrees), the reflection surface of the reflection plate 41 is the mirror surface 41a, and the light emitting portion FIG. 26 is a graph showing the light distribution characteristic of the illumination device 32 in which 11 is three-surface light emission, and FIG. 26B is a schematic view showing the configuration of the illumination device 32.

When the inclination angle of the reflection surface of the reflection plate 41 is-(minus), it means that the reflection plate 41 is in the backward direction from the state of the reflection plate 12. Specifically, as described above, the reflecting plate 41 has a shape bent backward from the position corresponding to both end edges of the light source cover 23 on the reflecting plate 41 side. This point is the same as in the other illumination devices described below.

In (a) of FIG. 27, the inclination angle of the reflection surface of the reflection plate 41 is -20 degrees (the angle to the direction in which the light distribution of the LED 21 is strongest is 110 degrees), the reflection surface of the reflection plate 41 is the mirror surface 41a, and the light emitting portion FIG. 27 is a graph showing the light distribution characteristic of the illumination device 32 in which 11 is three-surface light emission, and FIG. 27 (b) is a schematic view showing the configuration of the illumination device 32.

In FIG. 28A, the inclination angle of the reflection surface of the reflection plate 41 is -30 degrees (the angle with respect to the direction in which the light distribution of the LED 21 is the strongest is 120 degrees), the reflection surface of the reflection plate 41 is a mirror surface 41a, and the light emitting portion FIG. 28 is a graph showing the light distribution characteristic of the illumination device 32 in which 11 is three-surface light emission, and FIG. 28B is a schematic view showing the configuration of the illumination device 32.

In (a) of FIG. 29, the inclination angle of the reflection surface of the reflection plate 41 is +10 degrees (the angle to the direction in which the light distribution of the LED 21 is strongest is 80 degrees), the reflection surface of the reflection plate 41 is the mirror surface 41 a, and the light emitting portion 11 FIG. 29 (b) is a schematic view showing the configuration of the illumination device 32. FIG.

The inclination angle of the reflection surface of the reflection plate 41 being + (minus) means that the reflection plate 41 is inclined in a forward direction with respect to the state of the reflection plate 12. Specifically, as described above, the reflecting plate 41 has a shape that is bent in the forward direction from the position corresponding to both end edges of the light source cover 23 on the reflecting plate 41 side. This point is the same as in the other illumination devices described below.

In (a) of FIG. 30, the inclination angle of the reflection surface of the reflection plate 41 is +20 degrees (the angle to the direction in which the light distribution of the LED 21 is strongest is 70 degrees), the reflection surface of the reflection plate 41 is the mirror surface 41 a, and the light emitting portion 11 FIG. 30 is a graph showing the light distribution characteristic of the lighting device 32 in which the light emission is three-surface light emission, and FIG. 30 (b) is a schematic view showing the configuration of the lighting device 32.

Judging from the light distribution of the

illumination devices

31 and 32 shown above, the angle of the reflector (reflectors 12 and 41) is +20 degrees to -30 degrees (the angle to the direction in which the light distribution of the LED 21 is the strongest is 70 degrees Within the range of ̃120 degrees, it is possible to obtain a more preferable light distribution state than the conventional lighting device. However, the angle of the reflector (reflectors 12 and 41) is in the range of 0 degrees (including 0 degrees) to -30 degrees (90 degrees to 120 degrees with respect to the direction in which the light distribution of the LED 21 is strongest) Is more preferred. Furthermore, the angle of the reflecting plate (reflecting plates 12 and 41) is 0 degrees (not including 0 degrees) to -30 degrees (the angle with respect to the direction in which the light distribution of the LED 21 is strongest is larger than 90 degrees and 120 degrees or less) More preferably, it is in the range.

In addition, when the inclination angle of the reflection surface of the reflection plate 41 is gradually changed from +20 degrees to -30 degrees, the intensity of the light distribution in the lateral direction with respect to the intensity of the light distribution in the forward direction gradually increases. This point is the same as in the following other embodiments.

Further, even when the reflection surface of the reflection plate 41 is inclined to the + side, a light distribution characteristic better than that of the conventional illumination device can be obtained as long as the inclination angle is within the range of +20 degrees.

[Embodiment 8]
Further embodiments of the present invention will be described below on the basis of the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

Here, the light distribution of the illumination device 31 having the reflection plate 12 (the inclination angle of the reflection surface is 0 degree) as described above, the reflection surface of the reflection plate 12 is the milky white surface 12 b, and the light emitting portion 11 emits three lights. The light distribution characteristics of the lighting device 32 having the characteristics and the reflecting plate 41 (having the inclination angle), the reflecting surface of the reflecting plate 41 having the milky white surface 41 b, and the light emitting unit 11 emitting three lights will be described.

31 (a) shows an illumination device in which the inclination angle is 0 degrees (the angle with respect to the direction in which the light distribution is strongest is 90 degrees), the reflection surface of the reflection plate 12 is a milky white surface 12b, and FIG. 31 is a graph showing the light distribution characteristic of 31, and FIG. 31 (b) is a schematic view showing the configuration of the illumination device 31.

In (a) of FIG. 32, the inclination angle of the reflection surface of the reflection plate 41 is -10 degrees (the angle to the direction in which the light distribution of the LED 21 is strongest is 100 degrees), the reflection surface of the reflection plate 41 is the milky white surface 41b, and light emission FIG. 32 is a graph showing the light distribution characteristic of the illumination device 32 in which the section 11 emits light in three planes, and FIG. 32 (b) is a schematic view showing a configuration of the illumination device 32.

In (a) of FIG. 33, the inclination angle of the reflection surface of the reflection plate 41 is -20 degrees (the angle with respect to the direction in which the light distribution of the LED 21 is strongest is 110 degrees), and the reflection surface of the reflection plate 41 is the milky white surface 41b FIG. 33 is a graph showing the light distribution characteristic of the lighting device 32 in which the section 11 emits light in three planes, and FIG. 33 (b) is a schematic view showing the configuration of the lighting device 32.

In (a) of FIG. 34, the inclination angle of the reflection surface of the reflection plate 41 is -30 degrees (the angle to the direction in which the light distribution of the LED 21 is the strongest is 120 degrees), and the reflection surface of the reflection plate 41 is the milky white surface 41b FIG. 33 is a graph showing the light distribution characteristic of the lighting device 32 in which the section 11 emits light in three planes, and FIG. 33 (b) is a schematic view showing the configuration of the lighting device 32.

In (a) of FIG. 35, the inclination angle of the reflection surface of the reflection plate 41 is +10 degrees (the angle with respect to the direction in which the light distribution of the LED 21 is the strongest is 80 degrees), the reflection surface of the reflection plate 41 is a milky white surface 41 b, and the light emitting portion FIG. 35 is a graph showing the light distribution characteristic of the illumination device 32 in which 11 is three-surface light emission, and FIG. 35 (b) is a schematic view showing the configuration of the illumination device 32.

In (a) of FIG. 36, the inclination angle of the reflection surface of the reflection plate 41 is +20 degrees (the angle to the direction in which the light distribution of the LED 21 is strongest is 70 degrees), the reflection surface of the reflection plate 41 is the milky white surface 41 b, and the light emitting portion FIG. 36 is a graph showing the light distribution characteristic of the illumination device 32 in which 11 is three-surface light emission, and FIG. 36 (b) is a schematic view showing the configuration of the illumination device 32.

The preferred angles of the reflectors (reflectors 12 and 41) and the more preferred angles and the like determined from the light distribution of the

illumination devices

31 and 32 described above were the same as the angles shown in the seventh embodiment.

[Embodiment 9]
Further embodiments of the present invention will be described below on the basis of the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

Here, the light distribution of the illumination device 31 having the reflection plate 12 (the inclination angle of the reflection surface is 0 degree) as described above, the reflection surface of the reflection plate 12 is the milky white surface 12 b, and the light emitting portion 11 has dual emission. The light distribution characteristics of the illumination device 32 having the characteristics and the reflecting plate 41 (having an inclination angle), the reflecting surface of the reflecting plate 41 having the milky white surface 41 b, and the light emitting unit 11 having two-plane light emission will be described.

In (a) of FIG. 37, the illumination device has an inclination angle of 0 degrees (an angle of 90 degrees with respect to the direction in which the light distribution is strongest), the reflecting surface of the reflecting plate 12 is a milky white surface 12b, and the light emitting unit 11 emits two light. FIG. 37 is a graph showing the light distribution characteristic of 31, and FIG. 37 (b) is a schematic view showing the configuration of the illumination device 31.

The illumination device 31 shown in (b) of FIG. 37 is a non-emission surface 23a where the front surface of the light source cover 23 does not emit light, and the left and right side surfaces emit light (the left and right side surfaces are emission surfaces) There is. The reflection surface of the reflection plate 12 is perpendicular to the direction in which the light distribution of the LED 21 is the strongest (the angle to the direction in which the light distribution is the strongest is 90 degrees).

In (a) of FIG. 38, the inclination angle of the reflection surface of the reflection plate 41 is -10 degrees (the angle to the direction in which the light distribution of the LED 21 is the strongest is 100 degrees), the reflection surface of the reflection plate 41 is the milky white surface 41b, and light emission FIG. 38 is a graph showing the light distribution characteristic of the lighting device 32 in which the part 11 emits light in two planes, and FIG. 38B is a schematic view showing the configuration of the lighting device 32.

In (a) of FIG. 39, the inclination angle of the reflection surface of the reflection plate 41 is -20 degrees (the angle with respect to the direction in which the light distribution of the LED 21 is strongest is 110 degrees), and the reflection surface of the reflection plate 41 is the milky white surface 41b FIG. 39 is a graph showing the light distribution characteristic of the lighting device 32 in which the section 11 emits light in two planes, and FIG. 39 (b) is a schematic view showing the configuration of the lighting device 32.

In (a) of FIG. 40, the inclination angle of the reflection surface of the reflection plate 41 is -30 degrees (the angle with respect to the direction in which the light distribution of the LED 21 is the strongest is 120 degrees), the reflection surface of the reflection plate 41 is the milky white surface 41b, and light emission FIG. 33 is a graph showing the light distribution characteristic of the illumination device 32 in which the part 11 emits light in two planes, and FIG. 33 (b) is a schematic view showing the configuration of the illumination device 32.

In (a) of FIG. 41, the inclination angle of the reflection surface of the reflection plate 41 is +10 degrees (the angle to the direction in which the light distribution of the LED 21 is the strongest is 80 degrees), the reflection surface of the reflection plate 41 is the milky white surface 41 b, and the light emitting portion FIG. 41 is a graph showing the light distribution characteristic of the illumination device 32 in which 11 is a two-plane light emission, and FIG. 41B is a schematic view showing the configuration of the illumination device 32.

In (a) of FIG. 42, the inclination angle of the reflection surface of the reflection plate 41 is +20 degrees (the angle with respect to the direction in which the light distribution of the LED 21 is strongest is 70 degrees), the reflection surface of the reflection plate 41 is a milky white surface 41b, and the light emitting portion FIG. 42 is a graph showing the light distribution characteristic of the illumination device 32 in which 11 is a two-plane light emission, and FIG. 42 (b) is a schematic view showing the configuration of the illumination device 32.

illumination devices

As shown in the present embodiment, when the light source cover is a rectangular light source cover 23, the front surface of the light source cover 23 may be the non-light emitting surface 23a. As described above, even in the

illumination devices

31 and 32 in which the two surfaces emit light and the reflection surfaces are the milky

white surfaces

12b and 41b, it is possible to realize the light distribution characteristic having light distribution stronger in the lateral direction than the front direction.

In the present embodiment, as the case where the

illumination devices

31 and 32 have the two-surface light emission configuration, the case where the reflection surfaces of the

reflection plates

12 and 41 are milky

white surfaces

12 b and 41 b is shown. However, the reflecting surfaces of the reflecting

plates

12 and 41 in this case may be the mirror surfaces 12a and 41a.

[Embodiment 10]
Further embodiments of the present invention will be described below on the basis of the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

Here, as described above, it has the reflecting plate 12 (inclination angle of the reflecting surface is 0 degree), the reflecting surface of the reflecting plate 12 is the mirror surface 12 a, the light source cover 181 has a mountain shape, and the light emitting portion 182 has dual surface light emission. A light distribution characteristic of the lighting device 33, a reflecting plate 41 (with an inclination angle), a reflecting surface is a mirror surface 41a, a light source cover 181 is a mountain shape, and a light emitting portion 182 is a light emitting unit 182 The light characteristics will be described.

In (a) of FIG. 43, the inclination angle is 0 degrees (the angle with respect to the direction in which the light distribution is strongest is 90 degrees), the reflection surface of the reflection plate 12 is a mirror surface 12a, the light source cover 181 has a mountain shape, and the light emitting portion 182 is FIG. 43 is a graph showing the light distribution characteristic of the illuminating device 33 with two-surface light emission, and FIG. 43 (b) is a schematic view showing the configuration of the illuminating device 33.

The illumination device 33 shown in (b) of FIG. 43 has a light source cover 181 in which a mountain shape is formed by the opposite side surfaces, and two-sided light emission is achieved. The mountain-shaped top of the light source cover 181 coincides with the forward direction of the LED 21 (the direction in which the light distribution of the LED 21 is the strongest). The light emitting unit 182 having the light source cover 181 covers the LED substrate 24 similarly to the light emitting unit 11. The reflection surface of the reflection plate 12 is perpendicular to the direction in which the light distribution of the LED 21 is the strongest (the angle to the direction in which the light distribution is the strongest is 90 degrees).

In FIG. 44 (a), the inclination angle of the reflection surface of the reflection plate 41 is -10 degrees (the angle to the direction in which the light distribution of the LED 21 is the strongest is 100 degrees), the reflection surface of the reflection plate 41 is a mirror surface 41a, and the light source cover FIG. 44 is a graph showing the light distribution characteristic of the lighting device 34 having a mountain shape 181 and the light emitting part 182 emitting two-plane light, and FIG. 44B is a schematic view showing a configuration of the lighting device 34.

In FIG. 45A, the inclination angle of the reflection surface of the reflection plate 41 is -20 degrees (the angle with respect to the direction in which the light distribution of the LED 21 is strongest is 110 degrees), the reflection surface of the reflection plate 41 is a mirror surface 41a, and the light source cover FIG. 45 is a graph showing the light distribution characteristic of the lighting device 34 having a mountain shape 181 and the light emitting part 182 emitting two-plane light, and FIG. 45B is a schematic view showing a configuration of the lighting device 34.

In (a) of FIG. 46, the inclination angle of the reflection surface of the reflection plate 41 is -30 degrees (the angle to the direction in which the light distribution of the LED 21 is the strongest is 120 degrees), the reflection surface of the reflection plate 41 is a mirror surface 41a, and the light source cover FIG. 46 is a graph showing the light distribution characteristic of the lighting device 34 having a mountain shape 181 and the light emitting part 182 emitting two-surface light, and FIG. 46 (b) is a schematic view showing the configuration of the lighting device 34.

In (a) of FIG. 47, the inclination angle of the reflection surface of the reflection plate 41 is +10 degrees (the angle to the direction in which the light distribution of the LED 21 is strongest is 80 degrees), the reflection surface of the reflection plate 41 is a mirror surface 41 a, and the light source cover 181 Is a graph showing the light distribution characteristic of the lighting device 34 having a mountain shape and the light emitting part 182 emitting two-plane light, and (b) of FIG. 47 is a schematic view showing a configuration of the lighting device 34.

In (a) of FIG. 48, the inclination angle of the reflection surface of the reflection plate 41 is +20 degrees (the angle to the direction in which the light distribution of the LED 21 is strongest is 70 degrees), the reflection surface of the reflection plate 41 is a mirror surface 41 a, and the light source cover 181 Is a graph showing the light distribution characteristic of the lighting device 34 having a mountain shape and the light emitting part 182 having two-surface light emission, and FIG. 48 (b) is a schematic view showing a configuration of the lighting device 34.

illumination devices

33 and 34 described above were the same as the angles shown in the seventh embodiment.

As described above, the

illumination devices

33 and 34 of the present embodiment are configured to have the light source cover 181 having a mountain shape. Thus, even if the light source cover 181 has a mountain shape, the

lighting devices

33 and 34 have light distribution characteristics close to those of the

lighting devices

31 and 32 having the rectangular light source cover 23. This point is the same as in the

illumination devices

33 and 34 shown in the following eleventh embodiment.

[Embodiment 11]
Further embodiments of the present invention will be described below on the basis of the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

Here, as described above, it has the reflecting plate 12 (inclination angle of the reflecting surface is 0 degree), the reflecting surface of the reflecting plate 12 is the milky white surface 12 b, the light source cover 181 has a mountain shape, and the light emitting portion 182 has dual emission. The light distribution characteristic of the lighting device 33 and the reflecting plate 41 (with inclined angle), the reflecting surface is the milky white surface 41 b, the light source cover 181 is mountain-shaped, and the light emitting portion 182 is the two-surface light lighting device 34 The light distribution characteristic of the

In FIG. 49A, the inclination angle is 0 degrees (the angle with respect to the direction in which the light distribution is strongest is 90 degrees), the reflection surface of the reflection plate 12 is the milky white surface 12b, and the light source cover 181 has a mountain shape. Is a graph showing the light distribution characteristic of the illumination device 33 of two-surface emission, and (b) of FIG. 49 is a schematic view showing a configuration of the illumination device 33.

In (a) of FIG. 50, the inclination angle of the reflection surface of the reflection plate 41 is -10 degrees (the angle to the direction in which the light distribution of the LED 21 is the strongest is 100 degrees), the reflection surface of the reflection plate 41 is the milky white surface 41b, and the light source FIG. 50 (b) is a schematic view showing the configuration of the illumination device 34. The graph shows the light distribution characteristic of the illumination device 34 in which the cover 181 has a mountain shape and the light emitting part 182 has a two-surface emission.

51A shows that the inclination angle of the reflection surface of the reflection plate 41 is -20 degrees (the angle with respect to the direction in which the light distribution of the LED 21 is the strongest is 110 degrees), the reflection surface of the reflection plate 41 is the milky white surface 41b, and the light source 51 is a graph showing the light distribution characteristic of the illumination device 34 in which the cover 181 has a mountain shape and the light emitting part 182 has two-surface light emission, and FIG.

In FIG. 52A, the inclination angle of the reflection surface of the reflection plate 41 is -30 degrees (the angle with respect to the direction in which the light distribution of the LED 21 is the strongest is 120 degrees), the reflection surface of the reflection plate 41 is the milky white surface 41b, and the light source 52 is a graph showing the light distribution characteristic of the lighting device 34 in which the cover 181 has a mountain shape and the light emitting part 182 has two-surface light emission, and FIG.

In (a) of FIG. 53, the inclination angle of the reflection surface of the reflection plate 41 is +10 degrees (the angle to the direction in which the light distribution of the LED 21 is strongest is 80 degrees), the reflection surface of the reflection plate 41 is a milky white surface 41b, and the light source cover FIG. 53 is a graph showing the light distribution characteristic of the lighting device 34 having a mountain shape 181 and the light emitting part 182 emitting two-plane light, and FIG. 53 (b) is a schematic view showing a configuration of the lighting device 34.

In (a) of FIG. 54, the inclination angle of the reflection surface of the reflection plate 41 is +20 degrees (the angle to the direction in which the light distribution of the LED 21 is the strongest is 70 degrees), the reflection surface of the reflection plate 41 is a milky white surface 41 b, and the light source cover FIG. 54 is a graph showing the light distribution characteristic of the lighting device 34 having a mountain shape 181 and the light emitting part 182 emitting two-plane light, and FIG. 54 (b) is a schematic view showing a configuration of the lighting device 34.

illumination devices

[Embodiment 12]
Further embodiments of the present invention will be described below on the basis of the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

(Differences in light distribution characteristics due to differences in the state of the reflecting surfaces of the reflecting plates 12 and 41)
In (a) of FIG. 55, the light distribution of the illumination device 32 in which the inclination angle of the reflecting surface of the reflecting plate 41 is, for example, -10 degrees, the reflecting surface of the reflecting plate 41 is the milky white surface 41b, and the light emitting unit 11 emits three lights. Explanatory drawing which shows a state, (b) of FIG. 55 is a graph which shows the light distribution characteristic of the said illuminating device 32. FIG. (A) of FIG. 56 shows a configuration of the illumination device 32 in which the inclination angle of the reflection surface of the reflection plate 41 is −20 degrees, the reflection surface of the reflection plate 41 is the milky white surface 41 b, and the light emitting unit 11 emits three lights. FIG. 56 (b) is a schematic view, and FIG. 56 (b) is a graph showing the light distribution characteristic of the lighting device 32. (B) of FIG. 55 shows the light distribution characteristic shown in (a) of FIG. 32 in detail. 56 (a) is the same as FIG. 33 (b) and FIG. 56 (c) is the same as FIG. 33 (a).

The light distribution characteristics of the

illumination devices

31 and 32 differ between the case where the reflection surfaces of the

reflection plates

12 and 41 are the mirror surfaces 12a and 41a and the milky

white surfaces

12b and 41b, as is clear from FIGS.

Specifically, for example, the light distribution state of the illumination device 32 in which the inclination angle of the reflecting surface of the reflecting plate 41 is, for example, -10 degrees, the reflecting surface of the reflecting plate 41 is the milky white surface 41b, and the light emitting unit 11 emits three lights. 55 (a), and the light distribution characteristic thereof is as shown in FIG. 55 (b). In the light distribution characteristic ((a) in FIG. 26) in the case where the reflecting surface is the mirror surface 41a, the light distribution in the diagonally forward direction is particularly strong. On the other hand, in the light distribution characteristic ((b) in FIG. 55) in the case where the reflecting surface is the milky white surface 41b, the light distribution in the oblique front is not so strong, and the light distribution in the oblique front is generally strong. ing.

Furthermore, it confirms also about the case where the inclination angle of a reflective surface is another inclination angle. The light distribution state of the illumination device 32 in which the inclination angle of the reflection surface of the reflection plate 41 is -20 degrees, the reflection surface of the reflection plate 41 is the milky white surface 41b, and the light emitting portion 11 emits three lights is shown in FIG. The light distribution characteristic is as shown in FIG. 56 (c). In the light distribution characteristic ((a) in FIG. 27) in the case where the reflecting surface is the mirror surface 41a, the light distribution in the diagonally forward direction is particularly strong, as in the above case. On the other hand, in the light distribution characteristic ((b) in FIG. 56) in the case where the reflecting surface is the milky white surface 41b, the light distribution in the oblique front is not so strong as in the above case, and the distribution in the front from the oblique front The light is getting stronger overall.

(Configuration of the lighting device 35)
(A) of FIG. 57 is an explanatory view showing a light distribution state of the illumination device 35 of the present embodiment, and (b) of FIG. 57 is a graph showing light distribution characteristics of the illumination device 35.

As described above, utilizing the difference between the light distribution characteristic when the reflection surface is the mirror surface 41a and the light distribution characteristic when the reflection surface is the milky white surface 41b, the illumination device 35 having both the light distribution characteristics is used. It can be manufactured.

The illumination device 35 has a reflection plate 41, and the reflection plate 41 is different in the state of the reflection surface on the right side and the reflection surface on the left side. Specifically, for example, the reflection surface on the right side of the reflection plate 41 is a mirror surface 41a, and the reflection surface on the left side is a milky white surface 41b. The other configuration of the lighting device 35 is the same as the lighting device 32 described above.

(Operation and advantages of the lighting device 35)
As shown in (c) of FIG. 57, the illumination device 35 has different light distributions as shown in (c) of FIG. 57 because the right reflection surface is the mirror surface 41a and the left reflection surface is the milky white surface 41b. It can show the characteristics. Specifically, in the illumination device 35, the light distribution on the diagonally front is particularly strong on the right side, the light distribution on the diagonally front is not so strong on the left side, and the light distribution from the diagonally front to the front is generally strong. . Thereby, the illuminating device 35 can be utilized as an illuminating device of the place where uneven | corrugated light distribution by right and left is preferable.

(Configuration of Showcase 161 with Lighting Device 35)
FIG. 58 is a longitudinal cross-sectional view of the showcase 161 provided with the illumination device 35 shown in FIG. As shown in FIG. 58, the upper plate portion 104 of the showcase 161 has a downward curved portion 104b which is curved downward in a circular arc instead of the downward bending portion 104a of the showcase 101 shown in FIG. . The lower curved portion 104b transmits light.

The illumination device 32 for illuminating the product 105 on the first shelf 102 is provided on the lower surface of the second shelf 103 of the showcase 161, and the product 105 on the second shelf 103 and the lower curve are provided on the lower surface of the upper plate portion 104. The illuminating device 35 which illuminates the part 104b is provided. The illumination device 32 is the illumination device 32 shown in FIG. 9, and the illumination device 35 is the illumination device 35 shown in FIG.

The lighting device 32 is disposed at the center in the front-rear direction of the lower surface of the second shelf 103, with the width direction of the second shelf 103 as the longitudinal direction. The illumination device 35 is disposed in the vicinity of the lower curved portion 104 b with the width direction of the upper plate portion 104 as the longitudinal direction. In detail, as for the illuminating device 35, the side of the reflective surface which is the milky white surface 41b is located in the downward curve part 104b side.

(Operation and advantages of the lighting device 32 in the showcase 161)
In the illumination device 35, the side of the reflective surface that is the milky white surface 41b is located on the lower curved portion 104b side, and the side of the reflective surface that is the mirror surface 41a is located on the opposite side to the lower curved portion 104b. Therefore, the illumination device 35 can illuminate the arc-shaped inner surface of the lower curved portion 104b substantially uniformly by the light distribution on the left side, and is disposed on the second shelf 103 by the light distribution on the right side. The entire product 105 can be illuminated well. The operation by the lighting device 32 and other advantages of the showcase 161 are similar to the showcase 101.

(Aspect ratio of luminous flux emitted from light emitting unit 11)
(A) of FIG. 59 is an explanatory view showing, for example, the relationship between longitudinal and lateral luminous fluxes emitted from the light emitting portion 11 of the illumination device 31, and (b) of FIG. 59 is an explanatory view showing the relation of the luminous fluxes by light distribution characteristics. It is.

In the

light emitting units

11 and 182 of the lighting apparatus shown in each of the above embodiments, a light flux emitted from the

light emitting units

11 and 182 in the longitudinal direction (forward direction of the LED 21) and a light flux emitted from the

light emitting units

11 and 182 in the lateral direction The aspect ratio of the luminous flux which is the ratio of is preferably 1: 1 or more (length / length is 1 or more).

[Embodiment 13]
Further embodiments of the present invention will be described below on the basis of the drawings. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

FIG. 60 is a schematic view showing a modified example of the reflectors 12 and 14 and the light emitting part that can be used for the lighting device of the present embodiment. As shown in FIG. 60, the reflecting plate 14 may have different inclination angles on the left and right, and may be provided, for example, before and after the light emitting unit 11.

As for the light source cover, the rectangular solid shape (light source cover 23) and the chevron shape (light source cover 181) are shown, but for example, a trapezoid, an oval long in the front-rear direction, or a curved side portion It may be

In the dimensions of the light source covers 23 and 181 described in the above embodiments, the vertical / horizontal ratio, which is the vertical (front direction) -horizontal (horizontal direction) ratio, may be 1.5 or more.

Moreover, in the above embodiment, the forward direction of the LED 21 (the direction in which the light distribution of the LED 21 is the strongest) and the longitudinal direction of the light source cover 23 or 181 coincide with each other. However, the LED 21 may be installed in a state where the front direction is inclined with respect to the vertical direction of the

light source cover

23, 181. That is, even if the forward direction of the LED 21 and the longitudinal direction (forward direction) of the

light source cover

23, 181 do not match, the aspect ratio (horizontal / longitudinal) of the light beam emitted from the

light source cover

23, 181 is 1 or more. If this is the case, the lighting apparatus shown in the above embodiments can obtain the desired effects described above.

[Summary]
In the lighting device according to aspect 1 of the present invention, in the lighting device including the LED 21 as a light source and the light emitting unit 11 having a light source cover 23 covering the LED 21, the light emitting unit 11 is viewed from the surface of the light source cover 23. In the emitted light flux, the ratio of the forward direction, which is the direction in which the light distribution of the LED 21 is the strongest, to the lateral direction orthogonal to the forward direction is 1 or more. Is provided on the surface on the opposite side, and is provided with a reflecting member (reflecting plates 12 and 41) that reflects light emitted from the light emitting unit 11 to the rear direction of the light emitting unit 11.

According to the above-described configuration, the light emitting unit 11 has a ratio of the forward direction, which is the direction in which the light distribution of the LED 21 is the strongest, to the lateral direction orthogonal to the forward direction, for the light flux emitted from the surface of the light source cover 23. The longitudinal direction is one or more, and the reflecting member reflects light emitted from the light emitting unit 11 to the rear direction of the light emitting unit 11. Therefore, it is possible to effectively utilize the wasteful light emitted from the light emitting unit 11 to the rear direction of the light emitting unit 11, and to strengthen the light distribution in the lateral direction and the light distribution in the diagonal forward direction of the light emitting unit 11. As a result, when the lighting device is disposed in, for example, a signboard or a showcase, graininess of the light source, glare and light unevenness hardly occur, and good illumination is possible. That is, the lighting device according to one aspect of the present invention has good light distribution characteristics by using the LED 21 as a light source and has a low cost because of the simple configuration in which the light emitting portion 11 is provided with the reflecting member. Can.

In the lighting device according to aspect 2 of the present invention, in the aspect 1, the reflecting surface of the reflecting member may have an angle of 90 degrees to 120 degrees with respect to the front direction.

According to the above configuration, the light emitted in the lateral direction from the light source cover 23 is not largely condensed in the forward direction by the reflecting member, and the light distribution of the light emitting portion 11 in the lateral direction and the light distribution in the oblique forward direction are You can definitely make it stronger.

In the illumination device according to aspect 3 of the present invention, in the aspect 2, the reflecting surface of the reflecting member may be configured to have an angle of greater than 90 degrees with respect to the front direction.

According to the above configuration, the light distribution in the lateral direction and the light distribution in the diagonal forward direction of the light emitting unit 11 can be further surely strengthened.

In the lighting device according to aspect 4 of the present invention, in any one of the aspects 1 to 3, the reflecting surface of the reflecting member may be milky white.

According to the above configuration, by making the reflecting surface of the reflecting member milky white, the light distribution of the light emitting portion 11 in the lateral direction and the light distribution in the oblique forward direction are better than in the case where the reflecting surface of the reflecting member is a mirror surface, for example. The strength can be somewhat softened, and the uniformity of light distribution from the lateral direction to the forward direction can be promoted.

In the illumination device according to aspect 5 of the present invention, in any one of the aspects 1 to 3, the reflection surface of the reflection member reflects light in the lateral direction of the light source cover 23 in the lateral direction and the right side. It may be configured differently.

According to the above configuration, the reflection surface of the reflection member has different light reflection states between the left side and the right side in the lateral direction of the light source cover 23. Therefore, the light distribution state between the left side and the right side of the light source cover 23 It can be set appropriately according to the use form.

In the lighting device according to aspect 6 of the present invention, in the aspect 5, the reflecting surface of the reflecting member has a mirror surface on one of the left and right sides in the lateral direction of the light source cover 23 and the other is a milky white surface It is good also as composition.

According to the above configuration, the light distribution on one side (mirror side) of the left side and the right side in the lateral direction of the light source cover is made to be a light distribution having a strong lateral direction and a diagonal forward direction according to the usage form of the lighting device. On the other side (milky white side), the intensity of the light distribution in the lateral direction and the oblique front direction can be somewhat softened, and the uniformity of the light distribution from the lateral direction to the forward direction can be promoted.

The signboard according to the seventh aspect of the present invention includes the lighting device of any one of the first to sixth aspects.

According to the above-described configuration, it is possible to manufacture a signboard that hardly causes graininess, glare and light unevenness of a light source at a simple cost.

A showcase according to aspect 8 of the present invention includes the lighting device according to any one of aspects 1 to 6 above.

According to the above-described configuration, it is possible to easily and inexpensively manufacture a showcase in which graininess, glare and light unevenness of the light source are not easily generated.

The showcase according to aspect 9 of the present invention includes the lighting device according to any one of aspects 1 to 6 above.

According to said structure, the crime prevention light which graininess of a light source, glare, and light nonuniformity do not produce easily can be manufactured easily and at low cost.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

1, 21, 31, 32 lighting device 11

light emitting portion

12, 41 reflecting plate 21 LED
Reference Signs List 22 substrate 23 light source cover 24 LED substrate 51 signboard 52 housing 52a back plate 52b front plate 52c top plate 52d bottom plate 52d right side plate 52f left side plate 53 fixing

members

101, 131, 161 showcases 171 crime prevention lights 181 light source cover 182 light emitting portion

Claims

In a lighting device comprising: an LED as a light source; and a light emitting unit having a light source cover covering the LED,
The light emitting unit has a light flux emitted from the surface of the light source cover, and the ratio of the forward direction, which is the direction in which the light distribution of the LED is the strongest, to the transverse direction orthogonal to the forward direction is 1 or more. Yes,
An illuminating device comprising: a reflecting member provided on a surface of the light emitting unit opposite to the front direction and reflecting light emitted from the light emitting unit to the back of the light emitting unit.
The lighting device according to claim 1, wherein an angle of the reflection surface of the reflection member with respect to the front direction is 90 degrees or more and 120 degrees or less.
The lighting device according to claim 2, wherein an angle of the reflective surface of the reflective member with respect to the front direction is larger than 90 degrees.
The lighting device according to any one of claims 1 to 3, wherein the reflecting surface of the reflecting member is milky white.
The lighting device according to any one of claims 1 to 3, wherein a reflection surface of the reflection member has different light reflection states on the left and right sides in the lateral direction of the light source cover.
The lighting device according to claim 5, wherein one of the left and right sides in the lateral direction of the light source cover is a mirror surface, and the other is a milky white surface.
A signboard comprising the lighting device according to any one of claims 1 to 6.
A showcase comprising the lighting device according to any one of claims 1 to 6.
A security light comprising the lighting device according to any one of claims 1 to 6.