JP2007234399A - Illumination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foldable illumination device 11 in which heat and light distribution characteristics specific to a light emitting diode element 21 are sufficiently taken into consideration. <P>SOLUTION: A plurality of illumination blocks 13 are foldably coupled by a coupling body 14. The illumination blocks 13 are provided with a metallic case 20, the light emitting diode element 21 is arranged on the surface side of the case 20, and heat of the light emitting diode element 21 is dissipated from the case 20. Light emitted by the respective light emitting diode elements 21 are light-controlled by a light controlling body 22 which is arranged so as to cover the whole surface side of the case 20, and a surface light emitting face 12 is obtained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a foldable lighting device.

  2. Description of the Related Art Conventionally, a foldable and planar lighting device that can be folded into a small size for convenience of carrying is known.

In such an illuminating device, an insulating substrate such as a flexible, flexible and flexible printed circuit board having a plurality of light emitting diode elements arranged on the surface is used, and a pair of insulating substrates are connected in a foldable manner by folding members. Has been. The folding direction of the pair of insulating substrates is a direction in which the light emitting diode elements on the surface of each insulating substrate face each other. Further, in order to effectively use the light emission of the light emitting diode element, a cylindrical lens that covers each light emitting diode element is used (for example, see Patent Document 1).
JP 2002-270007 A (page 4-5, FIGS. 1-4, FIG. 9)

  However, in the conventional illumination device, a light emitting diode element is used as a light source. However, sufficient consideration has not been given to a heat problem peculiar to the light emitting diode element and a problem of light distribution characteristics.

  That is, the light-emitting diode element is arranged on an insulating substrate such as a flexible, flexible, and flexible printed circuit board, so that sufficient heat dissipation from the insulating substrate cannot be obtained, the light-emitting diode element becomes high temperature, and the light-emitting diode Problems such as a reduction in luminous efficiency and lifetime of the element and thermal damage of the insulating substrate occur. In addition, a lens is used to effectively use the light emission of the light emitting diode element. Since this lens is a cylindrical lens that covers each light emitting diode element, the lens is separated in the surface direction. There is a problem that it is difficult to obtain a light-emitting surface.

  The present invention has been made in view of these points, and an object of the present invention is to provide a foldable lighting device that fully considers the specific heat and light distribution characteristics of a light-emitting element.

  The lighting device according to claim 1 is a case, a plurality of light emitting elements arranged on the surface side of the case, and a light control body that covers the entire surface side of the case and controls light emitted from each light emitting element. A plurality of lighting blocks; and a connecting body that foldably connects the plurality of lighting blocks.

  The case may be formed of a metal material or a resin material, but is preferably a metal material. For example, when formed of a metal material having excellent heat dissipation such as aluminum, the back surface of the case may be flat, but in order to improve heat dissipation, a heat sink structure in which a plurality of fins or the like are projected may be used. it can. Moreover, a light emitting diode element etc. can be used for a light emitting element, for example. Further, the light control body may have a lens function for controlling the light distribution facing the light emitting element, or a light guide function so that the entire light control body emits surface light. Moreover, a connection body can be connected so that folding is possible, for example in the both sides of an illumination block, or the edge part which mutually opposes an illumination block.

  The illumination device according to claim 2 is the illumination device according to claim 1, wherein the case has a cover portion disposed at a surface side edge portion of the light control body, and the cover portion is obtained by folding a plurality of illumination blocks. It is provided in the position where cover parts contact | abut.

  The cover part may be provided over the entire surface side edge part of the light control member or may be provided only in part.

  According to a third aspect of the present invention, there is provided the lighting device according to the first or second aspect, further comprising power supply means connected in parallel to the plurality of lighting blocks.

  As the power supply means, a flexible electric wire, a flexible wiring board, or the like can be used so that the illumination block can be folded.

  According to the lighting device of claim 1, the heat of the light emitting element can be efficiently radiated by the case, the temperature rise of the light emitting element is suppressed, the luminous efficiency and life are improved, and the thermal influence on the light control body is reduced. In addition, a planar light-emitting surface can be easily obtained by a light control body that covers the entire surface side of the case and controls light emitted from each light-emitting element. Therefore, it is possible to provide a foldable lighting device that fully considers the specific heat and light distribution characteristics of the light emitting element.

  According to the illuminating device of claim 2, in addition to the effect of the illuminating device of claim 1, even when the light control side of the illumination block is folded so as to face each other, the surface side edge of the light control body Since the cover portions of the arranged cases are in contact with each other and the surface of the light control body is prevented from contacting other members, damage to the light control body can be prevented.

  According to the lighting device according to claim 3, in addition to the effect of the lighting device according to claim 1 or 2, since the power feeding means is connected in parallel to the plurality of lighting blocks, the light emitting element of one lighting block is Even if it becomes non-conductive and stops emitting light, the other illumination blocks can emit light.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 is a perspective view of the lighting device, FIG. 2 is a cross-sectional view of a lighting block of the lighting device, FIG. 3 is a side view of a coupling body of the lighting device, FIG. 4 is a side view of the lighting device in a folded state, and FIG. 6 is a side view showing an example of use of the lighting device, FIG. 7 is a graph of light distribution of the lighting device, and FIG. 8 is a connection angle of the lighting block of the lighting device of 0 °. Fig. 9 is an illuminance distribution diagram of 3m ahead, and Fig. 9 is an illuminance distribution diagram of 3m ahead when the connection angle of the illumination block of the illumination device is 10 °, and Fig. 10 is 15 ° of the connection angle of the illumination block of the illumination device. It is an illuminance distribution figure of 3 m ahead in the case of doing.

  As shown in FIG. 1, the illuminating device 11 is a foldable type that can be folded and made compact for convenience of carrying, and can form a planar light emitting surface 12 when unfolded.

  The lighting device 11 includes a plurality of flat and elongated lighting blocks 13 and a plurality of connecting bodies 14 that connect both ends of the plurality of lighting blocks 13 in the longitudinal direction so that the connecting angle can be adjusted and the folding is possible. The illumination unit 15 is configured by the plurality of illumination blocks 13 connected in a foldable manner. A main body 16 is connected to one end of the lighting unit 15 in the connecting direction by a connecting body 14, and a handle 17 is connected to the other end by a connecting body 14. The main body 16 is connected to power supply means 18 that is connected in parallel to the plurality of illumination blocks 13 and supplies power.

  As shown in FIG. 2, the illumination block 13 includes a metal case 20, a light emitting diode element 21 as a plurality of light emitting elements arranged at intervals in a plurality of longitudinal directions on the surface side of the case 20, and a case The light control body 22 is disposed so as to cover the entire surface side of the light 20 and controls light emitted from each light emitting diode element 21.

  The case 20 is formed of a metal material having excellent heat transfer properties, such as aluminum, and has a long and narrow plate-like substrate portion 23. From both sides in the short direction of the substrate portion 23 toward the surface side of the substrate portion 23. The side plate portions 24 are formed so as to protrude, and the cover portion 25 is formed so as to be bent so as to cover the surface side edge portion of the light control body 22 from the tips of the side plate portions 24, and is formed in a substantially C-shaped cross section. Has been. A plurality of fins 26 protruding from a plurality of locations in the short direction are formed on the back surface side of the substrate portion 23 along the longitudinal direction, and a heat sink structure as a heat radiating means for radiating heat into the air is employed. Boss portions 27 having a substantially C-shaped cross section for connection with the connecting body 14 are formed on the inner surfaces of the side plate portions 24. The boss part 27 is also used as a light control body holding part that holds the light control body 22 between the cover part 25 and the light control body 22.

  The cover portion 25 of the case 20 is disposed at a position where the cover portions 25 come into contact with each other when folded so that the surface sides of the illumination block 13 face each other. The plurality of fins 26 protruding from the back surface side of the case 20 are arranged at positions where the fins 26 are arranged alternately when folded so that the back surface sides of the illumination block 13 face each other.

  The light emitting diode element 21 emits white light, for example, and is made into white light by mixing the blue light from the blue light emitting diode and the yellow light from the yellow phosphor that emits light when excited by the blue light. The light emitting diode element 21 is disposed on a substrate 28 formed of a material having excellent heat transfer properties such as aluminum, and is disposed on the surface side of the substrate portion 23 of the case 20 by the substrate 28. Therefore, the light emitting diode element 21 is excellent in heat transfer to the case 20, and is in a state of being thermally connected to the case 20.

  The light control body 22 is formed of a material such as a resin having a light transmitting property and a light guiding property, and is formed in an elongated flat plate shape corresponding to the longitudinal direction of the case 20, and the inner surface of the light guiding plate portion 29 It has a plurality of lens portions 30 formed at positions facing the light emitting diode elements 21 on the side. The front surface of the light guide plate portion 29 is a light emitting surface 31, and the back surface is formed with a reflective surface 32 that reflects and emits light guided through the light guide plate portion 29 toward the light emitting surface 31. The lens unit 30 is configured to receive light emitted from the light emitting diode element 21 and obtain a predetermined light distribution, and has a light distribution angle (1/2 beam angle) of 48 °, for example. Part of the light incident on the lens unit 30 is also guided to the light guide plate unit 29.

  Further, as shown in FIG. 3, the coupling body 14 has an attachment portion 35 attached to the end face of the illumination block 13, and two attachment screws 36 are attached to the boss portions 27 of the case 20 in the attachment portion 35. Two mounting holes 37 for screwing and mounting are formed. At both ends of the attachment portion 35, there are formed connection portions 38 that project toward different sides for connection to adjacent connection bodies 14, and each connection portion 38 is connected to another connection body 14 by a connection member 39. A connection hole 40 for connecting to the portion 38 is formed. The connecting member 39 has a structure in which a predetermined sliding resistance is applied between the connected connecting bodies 14. The connecting member 39 can change the connecting angle and apply the predetermined force by applying a predetermined operable force or more. If not added, the connection angle can be maintained.

  The main body 16 is formed in an elongated rectangular box shape, and houses a power supply unit and a control unit (not shown). A plug receiving portion 43 connected to the power supply portion is disposed on one end surface of the main body portion 16, and the plug receiving portion 43 is supplied with power from a battery 44 and from an AC adapter 46 using a commercial power source. Any of the plugs 47 to be connected can be connected to supply power.

  A plurality of harpoon-shaped attachment holes 48 are formed on the upper surface of the main body portion 16, and a locking tool 49 can be detachably attached to the attachment holes 48. By using the locking tool 49, the lighting device 11 can be suspended and used by a stand, for example.

  Further, the handle portion 17 is formed of a pipe, and the operation of folding and unfolding the illumination portion 15 can be facilitated.

  The power supply means 18 has a flexible wiring portion 52 wired from the power source portion of the main body portion 16 to the plurality of lighting blocks 13, and the plurality of lighting blocks 13 are connected in parallel to the wiring portion 52. ing. The wiring portion 52 is configured by a flexible electric wire, a flexible wiring board, or the like so that the illumination block 13 can be folded. In each lighting block 13, each light emitting diode element 21 is connected to the wiring portion 52 in parallel or in series by an electric wire or the like.

  Next, the operation of the illumination device 11 will be described.

  As shown in FIG. 1, when the illumination device 11 is used, the plurality of illumination blocks 13 of the illumination unit 15 are expanded to form the planar light emitting surface 12.

  Power is supplied to the main body unit 16 from the battery 44 or the AC adapter 46, and power is supplied to each lighting block 13 through the wiring unit 52, whereby each light emitting diode element 21 of each lighting block 13 emits light, and the light emitting surface 31 of the light control body 22 is emitted. The light is emitted from.

  The light emitted from each light emitting diode element 21 of each illumination block 13 enters each lens unit 30 of the light control body 22, and a part of the light incident on each lens unit 30 is emitted as light controlled by the lens unit 30. A part of the other light is emitted from the light guide plate part 29 and emitted from the light emitting surface 31 other than the lens part 30. Therefore, a surface light source is obtained in which light is emitted from the entire light emitting surface 31 and the entire light emitting surface 31 appears to shine.

  The heat generated by the light-emitting diode element 21 is transmitted to the metal case 20 through the substrate 28, and is radiated from the case 20 into the air. Since the plurality of fins 26 are provided on the back side of the case 20 where the light emitting diode element 21 is disposed, heat can be efficiently radiated, the temperature rise of the light emitting diode element 21 is suppressed, and the light emitting diode element of the light emitting diode element 21 21 can improve the luminous efficiency and lifetime, and reduce the thermal influence on the light control body 22 and the like.

  Even if the light emitting diode element 21 of one lighting block 13 becomes non-conductive and stops emitting light, the wiring portion 52 of the power feeding means 18 is connected to the plurality of lighting blocks 13 in parallel, so that other lighting blocks 13 can emit light, and the lighting device 11 cannot be used at all. Further, in each lighting block 13, if each light emitting diode element 21 is connected in parallel to the wiring portion 52, even if one light emitting diode element 21 becomes nonconductive and stops emitting light, it becomes nonconductive. Even if it stops emitting light, the other light emitting diode elements 21 can emit light, and the influence can be reduced.

  Further, when the lighting device 11 is carried or stored, as shown in FIGS. 4 and 5, the lighting unit 15 can be folded to be small.

  The lighting unit 15 is folded alternately so that the front surface sides and the back surface sides of the adjacent lighting blocks 13 face each other.

  At this time, in the portion that is folded so that the surface sides of the illumination block 13 face each other, the cover portions 25 of the case 20 arranged at the edge on the surface side of the light control body 22 come into contact with each other, and the surface of the light control body 22 Can prevent the light control body 22 from being damaged.

  A plurality of fins 26 protrude from the back surface side of the case 20 at a portion folded so that the back surfaces of the illumination block 13 face each other, but the fins 26 are alternately arranged to allow folding.

  Further, when the lighting device 11 is used, the light distribution characteristic can be arbitrarily adjusted by changing the connection angle of the plurality of lighting blocks 13 as shown in FIG.

  For example, the size of the illumination block 13 is 50 mm × 500 mm, the number of illumination blocks 13 is 7, the number of 1 W light emitting diode elements 21 of the illumination block 13 is 19 (133 in total), and the lens of the light control body 22 7 to 10 show the results of measuring the light distribution and the illuminance distribution with the light distribution angle (1/2 beam angle) of the part 30 being 48 °.

  FIG. 7 shows the light distribution when the connection angle of the illumination block 13 is 0 °, 10 °, and 15 °. FIGS. 8, 9 and 10 show the connection angle of the illumination block 13. Illuminance distributions of 3 m ahead when 0 °, 10 °, and 15 ° are shown, respectively.

  When the connection angle of the illumination block 13 was 0 °, the central luminous intensity of the planar light emitting surface 12 of the illumination device 11 was 6750 cd, and the central illuminance after 3 m was 750 lx.

  When the connection angle of the illumination block 13 was 15 °, the central luminous intensity of the planar light emitting surface 12 of the illumination device 11 was 3150 cd, and the central illuminance after 3 m was 380 lx.

  Therefore, when the connection angle of the illumination block 13 is 15 °, the light irradiation range can be approximately doubled compared to when the connection angle is 0 °.

  The cover portion 25 of the case 20 of the illumination block 13 may be provided over the entire surface side edge portion of the light control body 22 or may be provided only in part.

  In addition, the connecting body 14 is not limited to a configuration in which both ends of the illumination block 13 are foldably connected, and the connection body 14 may be foldably connected at the edges of the illumination block 13 facing each other.

  Further, the main body 16 may be connected separately to the illumination unit 15 by a cable or the like. In this case, a handle portion 17 may be provided on both sides of the illumination portion 15.

It is a perspective view of the illuminating device which shows one embodiment of this invention. It is sectional drawing of the illumination block of an illuminating device same as the above. It is a side view of the coupling body of an illuminating device same as the above. It is a side view of the folding state of an illuminating device same as the above. It is sectional drawing of the illumination block of the folding state of an illuminating device same as the above. It is a side view which shows the usage example of an illuminating device same as the above. It is a graph of the light distribution of an illuminating device same as the above. It is an illuminance distribution figure of 3 m ahead when the connection angle of the illumination block of an illuminating device is 0 degree. It is an illuminance distribution figure of 3m ahead when the connection angle of the illumination block of an illuminating device same as the above is 10 degrees. It is an illuminance distribution figure of 3 m ahead when the connection angle of the illumination block of an illuminating device same as the above is 15 degrees.

Explanation of symbols

11 Lighting equipment
13 Lighting block
14 Linkage
18 Power supply means
20 cases
21 Light-emitting diode elements as light-emitting elements
22 Light control body
25 Cover

Claims (3)

A plurality of lighting blocks having a case, a plurality of light emitting elements disposed on the surface side of the case, and a light control body disposed so as to cover the entire surface side of the case and controlling light emitted from each light emitting element;
A connecting body for foldably connecting a plurality of lighting blocks;
An illumination device comprising: The case has a cover portion disposed on the surface side edge portion of the light control body, and the cover portion is provided at a position where the cover portions contact each other when a plurality of illumination blocks are folded. The lighting device according to claim 1. The lighting device according to claim 1, further comprising power supply means connected in parallel to the plurality of lighting blocks.