JP2017050266A - Light-emitting diode type lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting diode type lighting device capable of providing high illuminance and a wider radiation angle.SOLUTION: An LED lighting device is provided with a reflective member which is provided extending so as to impart optical directionality to light radiated from an LED element and to cause the light to radiate from an LED lighting tube to the outside of the tube. The reflective member is provided with: an optical directionality forming surface for imparting optical directionality to light emitted from the LED element and for guiding the light from the LED lighting tube to the outside of the tube; and a pseudo-LED element forming surface which projects a pseudo LED element of the LED element which is mounted on a board. The light radiated from the LED element is radiated to the outside of the tube after having been confined within the tube.SELECTED DRAWING: Figure 3

Description

The present invention relates to a light-emitting diode illumination device including an electronic device such as a power source.

The light emission principle of an LED is that it emits light when a voltage is applied to a semiconductor element. It is well known to mount an element on a substrate and conduct electricity, but dissipate heat generated when electricity is passed through the LED element. To do so, a heat sink is essential.

Compared to conventional lighting fixtures, LEDs can reduce power consumption and produce the same illuminance and light energy as conventional incandescent and fluorescent lamps, and are expected to become more popular in the future. Yes.
In particular, as an alternative light source for a fluorescent lamp, a straight tube type LED lighting tube that has the same appearance as a fluorescent lamp and can be directly attached to an existing fluorescent lamp fixture is a typical LED light source.

In general, LED lighting tubes are broadly classified into general lighting and plant cultivation, and each is a cylindrical tube composed of a light emitting surface made of translucent or transparent glass or synthetic resin, and a heat sink for heat dissipation of the LED base. Is the body. Inside the tube body, LED elements are mounted on a surface on one side at a predetermined interval, and a circuit board through which current flows is provided.
The LED illuminating tube has the same shape as that of a straight tube fluorescent lamp as a whole, and a base is attached to both ends of the tube body, and terminals for connecting to the fixture are formed protrudingly.
With the above configuration, the LED illumination tube can be attached to an existing fluorescent lamp fixture as well as a new installation, and can receive power from the LED illumination tube to emit light from the LED inside the tube.
As an invention related to such an intuitive LED lighting tube, for example, in Patent Document 1, a cylindrical tube body made of polycarbonate and an opening provided in a part of the peripheral surface of the tube body are mounted. An LED lighting tube is disclosed that includes an aluminum heat sink and a plurality of LEDs mounted in the tube.

In Patent Document 2, an annular structure having an inner cavity is formed from a translucent casing and this case, and a circuit board thermally conductively fixed to a holding portion of a heat sink is attached to the circuit board. An LED lighting tube is disclosed that includes one or more LED light sources and two end caps fitted to the ends of the tubular structure.
In Patent Document 2, it can be used by attaching to a fluorescent lamp fixture instead of a conventional fluorescent lamp, and uniformly illuminates at a wide angle.

  JP 2011-113876 A   JP 2013-219004 A

However, LED lighting tubes such as Patent Document 1 and Patent Document 2 have a problem in heat dissipation material and design due to insufficient heat dissipation treatment when the LED as the light source emits light. In LED illuminating tubes such as Patent Document 1 and Patent Document 2, the heat dissipation process when the LED emits light is insufficient, and there is a problem in the heat dissipation material and the design.
In other words, it is desirable that the heat sink material be iron in terms of heat conduction, but because the specific gravity is high, the weight limit of the straight LED tube of 500 g [general 1.2 m straight tube] is far exceeded. For example, aluminum that can suppress the weight of the entire LED straight tube to 500 g or less is used as a heat sink material. However, the thermal conductivity of aluminum is about three times that of iron, not only is it difficult to extend the life of the LED due to insufficient heat dissipation of the LED, but also when the human touches the LED straight tube that is lit. I had to touch it.

On the other hand, the lumen [1 m] expressing the brightness of the LED straight tube as a numerical value collectively represents the total amount of light (total luminous flux) irradiated radially in all directions. However, in reality, it does not follow the numerical value of the lumen, and it often becomes dark. As described above, the LED straight tube is suitable for irradiating in a wide range, but when a light amount is required in a specific direction such as directly under the light source or its surrounding space, that is, a narrow angle (180 to 90 degrees). This is not necessarily suitable when the light distribution is required. In addition, LED-based lighting with integrated fixtures is a fixture that has the same structure not only in Japan but in the whole world and has been supplied to the market for several years. There is.
This patent relates to next-generation LED-based lighting that solves these problems all at once. Design that can meet the requirements of various appliances such as energy saving and high functionality, enabling illuminance and photosynthetic effective photon flux density (PPFD) comparable to fluorescent lamps with about half the power consumption of fluorescent lamps , A system that can be manufactured at low cost and can be replaced with the LED board or LED power supply in a universal integrated device that can be applied to the same type of device worldwide.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a light emitting diode illumination device including a driving device such as a power source that can obtain high heat dissipation and illuminance.

A light-emitting diode type illumination device according to the present invention includes an LED illumination tube including a total luminous flux transmissive plate disposed in a light irradiation direction,
LED element as a light source disposed on the substrate facing the total luminous flux transmitting plate in the LED illumination tube,
The LED element is driven by a single power source of (1) 5V, 12V or 24V, or (2) at least a forward voltage of 1.5V to 4.5V, or (3) a voltage of 90V to 240V A driving device to
The driving device is disposed at a position that does not interfere with light emitted from the LED element,
A first light reflecting member provided with a condensing reflection surface having a light reflection characteristic disposed on the light emitting side of the LED element;
The first light reflecting member is arranged to extend in the light emitting direction symmetrically or unsymmetrically with respect to the center line of the LED element,
The condensing reflection surface of the first light reflecting member has a light directivity forming surface for giving the light emitted from the LED element light directivity and irradiating the LED illumination tube outside the tube through the total luminous flux transmission plate,
A pseudo LED element forming surface for projecting a pseudo LED element of the LED element,
A second reflecting member provided on the illumination tube and provided with a light reflecting surface facing the total luminous flux transmitting plate and having a light reflecting property;
The second reflecting member is disposed in the wide-angle direction outward from the end of the first reflecting member along the shape of the total luminous flux transmitting plate,
The light emitted from the LED element is confined in the total luminous flux transmission plate and / or in the space between the total luminous flux transmission plate and the second reflecting member and irradiated outside the tube through the total luminous flux transmission plate. Light confinement means,
As the light is irradiated to the outside of the illumination tube, the pseudo LED mounted on the substrate is projected on the pseudo LED element forming surface.

A light-emitting diode type illumination device according to the present invention includes an LED illumination tube including a total luminous flux transmissive plate disposed in a light irradiation direction,
LED element as a light source disposed on the substrate facing the total luminous flux transmitting plate in the LED illumination tube,
The LED element is driven by a single power source of (1) 5V, 12V or 24V, or (2) at least a forward voltage of 1.5V to 4.5V, or (3) a voltage of 90V to 240V A driving device to
The driving device is disposed at a position that does not interfere with light emitted from the LED element,
A first light reflecting member provided with a condensing reflection surface having a light reflection characteristic disposed on the light emitting side of the LED element;
The first light reflecting member is arranged to extend in the light emitting direction symmetrically or unsymmetrically with respect to the center line of the LED element,
The condensing reflection surface of the first light reflecting member has a light directivity forming surface for giving the light emitted from the LED element light directivity and irradiating the LED illumination tube outside the tube through the total luminous flux transmission plate,
A pseudo LED element forming surface for projecting a pseudo LED element of the LED element,
A second reflecting member provided on the illumination tube and provided with a light reflecting surface facing the total luminous flux transmitting plate and having a light reflecting property;
The second reflecting member is disposed in the wide-angle direction outward from the end of the first reflecting member along the shape of the total luminous flux transmitting plate,
The first reflector is set at an elevation angle of 50 to 75 degrees with respect to the substrate, and the light emitted from the LED element is transmitted to the total luminous flux transmission plate and / or the total luminous flux transmission plate and the second reflective member. A light confinement means for confining in a space between the light beam and irradiating the outside of the tube through the total light flux transmitting plate,
Illuminance in which the pseudo LED element of the LED element disposed on the substrate is reflected on the pseudo LED formation surface when the LED element is viewed from the direction of light emitted from the LED element disposed on the substrate. Comprising 30-901x / w;

The driving device including an AC power source or the like is preferably disposed in an LED lighting tube that does not interfere with light emitted from the light source of the LED element. It is preferable to arrange all or a part of the electronic parts such as wiring attached to the driving device of the LED element on the back side of the substrate. However, in order to effectively use the back side of the substrate, the LED on the surface of the substrate It is preferable to arrange on the substrate on the opposite side of the LED element of the first light reflecting member that does not interfere with the light emitted from the light source of the element.

A third light reflecting member connecting the first light reflecting member and the second light reflecting member;
It is characterized by that.

The pseudo LED forming surface is defined and defined by the total reflectance of the light reflecting surface of the first reflecting member, the elevation angle of the first reflecting member, and the distance between the arrangement end of the LED element and the first reflecting member. It is characterized by being.

The distance between the installation end of the LED element and the front reflecting member is 0.1 mm to 5.0 mm, preferably 0.5 mm to 2.0 mm, and the elevation angle of the first reflecting member is 50 degrees to 75 degrees. Further, preferably, the reflector is set to 50 to 65 degrees, and the height of the reflector is set to 5 times or more, preferably 10 to 20 mm, of the width of the LED element.

The pseudo LED element forming surface varies at least one of a total reflectance of the light reflecting surface, an elevation angle of the first light reflecting member, and an interval length between the LED element installation end and the reflecting member. Thus, the number of images projected onto the pseudo LED forming surface is varied and projected.

The second light reflecting member and / or the all-light speed transmitting plate includes at least one light confinement recess.

The total light speed transmission plate has a total light speed transmittance of 95% or more.

The total reflectance of the light reflecting member is defined by 80% or more.

The light reflecting surface of the first reflecting member may be different in total reflectance and / or shape between the light directivity forming surface and the pseudo LED element forming surface.

The first and second light reflecting members include a heat sink material.

The light emitting diode type illumination device is a straight tube type light emitting diode type illumination device.

The light emitting diode illumination device is used in an electronic device.

According to the present invention, it is an object to provide a light emitting diode illumination device that can provide a light emitting diode illumination device including a driving device such as a power source capable of obtaining high heat dissipation and illuminance.

It is a perspective view of the straight tube | pipe type light emitting diode illuminating device concerning this embodiment. It is a disassembled perspective view of the straight tube | pipe type light emitting diode illuminating device shown in FIG. It is sectional drawing of the straight tube | pipe type light emitting diode illuminating device which concerns on 1st Embodiment in sectional line AA shown in FIG. It is the schematic explaining the optical path of the light emitted from the light source which is an LED element in the light emitting diode type illuminating device of FIG. The photograph irradiated from the illumination tube through the total luminous flux transmission plate from the state where the light emitted from the LED element is confined is shown. The photograph irradiated from the state where the light emitted from the LED element is not confined is shown. The photograph which the pseudo LED element of the LED element mounted in the board | substrate is reflected on the pseudo LED formation surface of a 1st reflective member is shown. It is a figure for demonstrating the other example of arrangement | positioning of the LED element in connection with embodiment of this invention. It is a figure for demonstrating the other example of arrangement | positioning of the LED element in connection with embodiment of this invention.

Hereinafter, the light emitting diode type illumination device according to the present invention, particularly the straight tube type light emitting diode type illumination device will be described in detail below. FIG. 1 is a schematic view showing a light emitting diode illumination device according to the present invention. FIG. 2 is an exploded perspective view of the straight tube type light emitting diode illumination device shown in FIG. FIG. 3 is a cross-sectional view of the straight tube type light emitting diode illuminating device according to the first embodiment taken along a cross-sectional line AA shown in FIG.

A light-emitting diode type illumination device includes an LED illumination tube including a total luminous flux transmissive plate disposed in a light irradiation direction;
LED element as a light source disposed on the substrate facing the total luminous flux transmitting plate in the LED illumination tube,
A first light reflecting member provided with a condensing reflection surface having a light reflection characteristic disposed on the light emitting side of the LED element;
The first light reflecting member is arranged to extend in the light emitting direction symmetrically or unsymmetrically with respect to the center line of the LED element,
The condensing reflection surface of the first light reflecting member has a light directivity forming surface for giving the light emitted from the LED element light directivity and irradiating the LED illumination tube outside the tube through the total luminous flux transmission plate, A second reflecting member comprising a pseudo LED element forming surface for projecting the pseudo LED element of the LED element, and a light reflecting surface disposed on the illumination tube and having a light reflecting property facing the total luminous flux transmitting plate; Preferably, the second reflecting member is disposed in a wide-angle direction outward from the end of the first reflecting member along the shape of the total luminous flux transmitting plate.

The driving device for driving the LED element as the light source is: (1) a single power source of 5 V, 12 V or 24 V, or (2) at least a forward voltage of 1.5 V to 4.5 V, or (3) 90 V to A drive circuit that is driven by any voltage of 240V is provided. In addition to the drive circuit, the drive device further includes electronic components such as an AC power supply and a capacitor, and wirings for connecting them. Electronic components such as an AC power source and a capacitor are preferably disposed at both ends in the longitudinal direction of the substrate. Thus, it is preferable that the driving device is disposed at a position that does not interfere with the light emitted from the LED element.

In addition, about electronic components other than an LED element, you may arrange | position all or one part on the back side rather than the surface side of a board | substrate, However, if an electronic component is provided in the surface side of the board | substrate 12, in an LED lighting tube The installation position of the substrate can be arranged on the back side, and the internal space on the back side of the substrate can be made wider.

The LED element is a surface-mounted white LED that emits white light when the above-described predetermined voltage is applied. It is preferable that the LED elements are arranged at regular intervals so as to form a line along the longitudinal direction of the substrate 12 at the center position in the width direction on the surface side of the substrate. The LED elements may be arranged in a plurality of rows along the longitudinal direction of the substrate 12. The LED elements may be arranged at random, such as zigzag, in addition to arranging one row in a straight line.

The first light reflecting member 19 is disposed symmetrically with respect to the center line of the LED element on both sides of the LED element, and the light emitted from the LED element has a light directivity to extend from the LED illumination tube to the outside of the tube. It is provided to extend so as to be irradiated. The first light reflecting member 19 is provided on the substrate.

FIG. 4 is a schematic diagram illustrating an optical path of light emitted from a light source that is an LED element in the light-emitting diode type illumination device of FIG. As shown in FIG. 4, the elevation angle of the first reflecting member with respect to the substrate is set to 50 to 75 degrees, preferably 50 to 65 degrees, and the second reflecting member is moved from the end of the first reflecting member. By arranging in the wide-angle direction toward the outside along the shape of the total luminous flux transmitting plate, the light emitted from the LED element goes straight through the internal space of the first reflecting member from directly below the light source of the LED element. Then, the light beam is irradiated from the total luminous flux transmission plate to the outside of the tube. (2) Reflected by the condensing reflection surface of the first reflection member, passes through the internal space of the first reflection member, and from the total luminous flux transmission plate to the tube body. (3) Further, the light reflected by the condensing / reflecting surface of the first reflecting member and reaching the total luminous flux transmitting plate through the internal space of the first reflecting member is further reflected by the second reflecting member. Then, the light is radiated from the total luminous flux transmission plate to the outside of the tube through the light confinement means. The total luminous flux transmission plate preferably has a curved surface.

Here, the light emitted from the LED element is confined in the light flux confining means provided in the total light flux transmitting plate and / or in the space between the total light flux transmitting plate and the second reflecting member. The light emitted from the confined LED element is irradiated outside the tube through the total luminous flux transmitting plate. It is preferable that the second reflecting member and / or the total light flux transmitting plate include at least one recess for confining light.

The light emitted from the LED element through the translucent cover including the total luminous flux transmission plate is preferably irradiated with an irradiation angle: 120 degrees to 180 degrees, a total luminous flux: 2000 to 3000 lm.

The elevation angle of the first light reflection plate is changed from 50 degrees to 75 degrees, the distance between the arrangement end of the LED element and the first light reflection plate is set to 0.1 to 5.0 mm, and the height of the first light reflection plate is set to LED. By setting the element width to 5 times or more, preferably 10 mm to 20 mm, the loss of light quantity can be eliminated at a wide irradiation angle, and the illuminance and PPFD can be improved.
The illuminance irradiated by the LED light source is preferably 1.5 to 2.0 times.
Note that the elevation angle of the first reflecting member with respect to the substrate, the distance between the LED element end portion and the reflecting plate, and the height of the reflecting plate may be varied according to the size of the LED lighting device such as the diameter.

FIG. 5A shows the total luminous flux from the state where the light emitted from the LED element is confined to the total luminous flux transmitting plate as the light confinement means and / or in the space between the total luminous flux transmission plate and the second reflecting member. The figure irradiated through the permeation | transmission board is shown. FIG.5 (b) shows the figure irradiated from the state which is not confined, respectively. From the figure, it can be seen that the light irradiated through the total luminous flux transmission plate from the state where the light is confined is irradiated almost uniformly over the entire total luminous flux transmission plate.
On the other hand, the light irradiated from the unconfined state has a bright central area where the LED elements are arranged, and its peripheral area has lower illuminance than the central area, and the central area and the peripheral area of the total luminous flux transmission plate. And the illuminance looks uneven.
Here, FIG. 5 (a) shows a color temperature of 3000K, total light transmittance: 60 to 70% (ML7500 series manufactured by Teijin Ltd .; milk white cover), and FIG. 5 (b) shows a color temperature of 3000K, total light transmittance. 89% (MN4800 series manufactured by Teijin Chemicals Ltd .; transparent cover) clear plate) was used.

FIG. 6 shows that the pseudo LED element 14 of the LED element 13 mounted on the substrate is first reflected when the LED element is viewed from the direction in which the light emitted from the LED element disposed on the substrate is irradiated. The photograph seen on the pseudo LED formation surface of a member is shown.
The illuminance of the LED element at that time is preferably 30 to 80 lx / w.

The pseudo LED element forming surface is defined and formed by the total reflectance of the first light reflecting surface, the elevation angle of the first light reflecting member, and the distance between the LED element installation end and the light reflecting surface of the reflecting member. It is preferable.

The light emitting diode type illumination device according to claim 1, further comprising a third light reflecting member that connects the first light reflecting member and the two light reflecting member.

The total luminous flux transmission plate preferably has a total luminous flux transmittance of 95% or more.
The total reflectance of the reflecting member is preferably defined by 80% or more.

The light reflecting surface of the first light reflecting member according to the present invention preferably has different total reflectance and / or shape between the light directivity forming surface and the pseudo LED element forming surface.

The pseudo LED element forming surface varies at least one of the total reflectance of the light reflecting surface, the elevation angle of the first light reflecting member, and the distance between the LED element end and the reflecting member. It is preferable that the number of the pseudo LED elements projected on the pseudo LED forming surface is varied and projected.

The light-emitting diode illumination device according to the present invention is preferably a straight tube light-emitting diode illumination device.

Furthermore, it is preferable that the light directivity forming surface and the pseudo LED forming surface have different shapes. The light directivity forming surface and the pseudo LED forming surface have at least a part of a shape other than a straight line and a straight line, for example, a curved surface, an unevenness, a saw shape, a combination of these shapes, and the pitch can be changed by these shapes. Alternatively, it may be formed in combination. The light directivity forming surface and the pseudo LED forming surface may have the same shape.

Further, the total reflectance may be different between the light directivity forming surface and the pseudo LED forming surface.
The total reflectance may be different in the range of 80% to 95%.

The first light reflecting member includes a light directivity forming surface for directing light emitted from the LED element to irradiate the LED illumination tube outside the tube, and a condensing reflection surface on the side facing the LED element. And a pseudo LED element forming surface for projecting the pseudo LED element of the mounted LED element. The pseudo LED element forming surface may form a light directivity forming surface.

When the light-emitting diode type illumination device is a straight tube type light-emitting diode type illumination lamp, it has a length and a diameter that can replace a conventional fluorescent tube in a fluorescent lamp fixture. The total length of the straight tube type light emitting diode type illumination lamp is the same as that of a conventional straight tube type fluorescent lamp, and can be appropriately set to, for example, 300 mm to 2400 mm depending on the application. Further, the diameter is substantially the same as that of a conventional straight tube fluorescent lamp, and as a whole, has the same outer shape and appearance as a straight tube fluorescent lamp.

Note that the tube of the light emitting diode illumination device is a member having a substantially semi-cylindrical cross-sectional shape. The tube of the light emitting diode illumination device can be formed of a material such as glass or synthetic resin, for example. For example, a member integrally formed so as to be a long semi-cylinder made of a material having predetermined elasticity such as polycarbonate resin may be used.
Moreover, the whole or a part of the tube of the light emitting diode type illumination lamp has translucency, and may be formed of a transparent, translucent, and colored transparent material as long as it can transmit light.

In addition, an electronic component such as an AC power source for driving the light emitting diode type illumination device is provided in the LED illumination tube, and is mounted on the substrate in a position and wiring manner that does not interfere with the light emitted from the LED light source. It is preferable.

In the LED lighting device of the present invention, the illuminance projected by the pseudo LED element is sufficient if the LLD element emits light, but preferably includes at least 30 lx / w to 80 lx / w. Here, the LED illuminance was measured by applying an alternating current of 100 V 50 Hz to the light emitting diode illumination device. For the measurement, a general form AA illuminance form defined in JIS C1609 was used. The measurement distance was set to 1 m between the front surface of the LED light source and the illuminance-type measurement reference plane. The light source was measured by lighting vertically downward.
The measurement results are as follows. The power consumption (W) of the LED element is 19.5W.
Measurement result 1; 724 (lx) 37.1 lx / w
Measurement result 1; 870 (lx) 44.6 lx / w
Measurement result 1; 1556 (lx) 79.8 lx / w

The reflective member preferably includes a heat sink member such as an Al material.
In the straight tube type light emitting diode type illumination lamp of the present embodiment, the distance between the heat sink part directly under the substrate on which the LED element is mounted and the heat sink part touched by the human body is set to a length two to three times longer than that of the conventional heat sink. This improves the heat conduction efficiency and enhances the heat dissipation effect of the heat generated when the LED element is energized.

In this embodiment, the heat sink structure directly under the substrate on which the LED element is mounted is not a semi-cylindrical structure and the distance from the LED element directly to the heat sink that touches the human body is short, but the distance from the LED element directly to the heat sink that touches the human body is increased. For this reason, an M-type structure is adopted to increase the heat conduction efficiency and promote heat dissipation.

In the structure of the present embodiment, an M-type heat sink (cross section) structure that condenses and reflects light at a constant angle reflects light emitted from the LED element and directs it in a predetermined direction to improve illuminance. Further, in order to make the light distribution angle of the heat sink (cross section) of the M-shaped structure wide, the heat sink surface on the LED element side is subjected to silver coating, plating or chrome treatment with high reflection efficiency.

Similarly, in order to make the light distribution angle wide, the heat sink cover is made to be diffusive or prism type.

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

The light emitting diode illumination device 1 has a length and a diameter that can replace a conventional fluorescent light tube in a fluorescent lamp fixture. The total length of the light emitting diode illumination device is the same as that of a conventional straight tube fluorescent lamp, and can be appropriately set to, for example, 300 mm, 450 mm, 600 mm, 900 mm, 1200 mm, 1800 mm, 2400 mm, etc. according to the application. The tube diameter of the light-emitting diode illuminating device is substantially the same as that of a conventional straight tube fluorescent lamp, and as a whole, has the same outer shape and appearance as a straight tube fluorescent lamp.

As shown in FIGS. 1 to 3, the light-emitting diode illuminating device 1 includes a cylindrical tube 10 including a translucent cover 31 and a tube member 15 including a total light flux transmitting plate, The LED element 13, the substrate 12 on which the LED element 13 is mounted, the substrate support member 17, the light reflecting member 19, the LED controller 22, and the end cap 50 are provided. Further, the light reflecting member 19 includes a first light reflecting member 191, a second light reflecting member 193, and a third light reflecting member 195.

Here, the tube member 15, the substrate support member 17, the first light reflecting member 191, the second light reflecting member 193, and the third light reflecting member 195 are made of a heat-resistant material such as aluminum, copper, or plastic. Preferably it is made. In the present embodiment, it is preferable that the substrate support member 17 and the first light reflecting member 191 are integrally formed. Further, it is preferable that the first light reflecting member 191, the second light reflecting member 193, and the third light reflecting member 195 are integrally formed. Furthermore, it is preferable that the substrate support member 17, the first light reflecting member 191, the second light reflecting member 193, and the third light reflecting member 195 are integrally formed. If plastic is used for these members 17, 191, 193, 195, these members can be easily formed integrally.

A drive device for driving the LED element is provided, and the drive device is either (1) a single power source of 5 V, 12 V or 24 V, or (2) at least a forward voltage of 1.5 V to 4.5 V, or (3) It is driven with any of 90V to 240V.

It is preferable that the driving device is disposed at a position where it does not interfere with light emitted from the LED element.
In the figure, the power source for driving the LED element is disposed on the bottom of the tube body below the substrate 12 on which the LED element 13 is mounted. A power source for driving the LED element is mounted on the substrate 12 on the opposite side of the first light reflecting member facing the LED element.
In addition, it is preferable that a power supply is arrange | positioned in the position which does not interfere with the light emitted from an LED element not only in these arrangement | positioning positions.

By using a heat sink for these members 15, 17, 191, 193, 195, a high heat dissipation effect can be obtained. It can be 40 degreeC. The heat sink material is generally aluminum or copper, which is excellent in heat conduction efficiency.

By integrally processing these members 17, 191, 193, and 195 with alumite dies (extrusion), the manufacturing process is simplified, and the cost can be reduced and the process can be shortened.

That is, according to the light-emitting diode type illumination device 1, the heat sink surface temperature, which is the biggest problem of LED straight tubes (fluorescent lamp type) and LEDs, can be kept at a safe temperature (about 40 ° C.) even when touched by a human body. In addition, the illuminance can be equivalent to or better than that of a fluorescent lamp.

As shown in FIG. 3, the substrate 12 is accommodated and supported in a longitudinal internal space (closed space) of the substrate support member 17. In addition, the LED element 13 is disposed in a stripe-like opening formed on the side of the translucent cover 31 of the substrate support member 17 with the light emitting surface facing the translucent cover 31.

The substrate 12 has heat conductivity. The board | substrate support member 17 receives the heat | fever generate | occur | produced from the LED element through the board | substrate 12, and is transmitted to a 1st light reflection member.
The first light reflecting member 191 is extended from one end serving as a coupling portion with the substrate support member 17 toward the translucent cover 31.

As shown in FIG. 3, the LED element 13 is disposed on the center line 61 of the translucent cover 31 along the cross section in the cross section of the closed space of the light emitting diode lighting device 1. The translucent cover 31 is preferably a total luminous flux transmission plate having a total luminous flux transmittance of 95% or more. The total luminous flux transmission plate preferably has a total luminous flux transmittance of 95 (%) or more. As the translucent cover 33, a resin-made ML series that is a high diffusion type manufactured by Teijin Limited was used. Here, the total luminous flux transmittance (%) is represented by the total luminous flux when the test piece is placed / total luminous flux when the test piece is not placed × 100.

The LED elements 13 mounted on the substrate 12 may be arranged in one row or in a plurality of rows with a predetermined interval in the longitudinal direction of the substrate. As shown in FIG. 2, a plurality of LED elements 13 are mounted on the substrate 12 at equal intervals along the longitudinal direction. An LED controller 21 is disposed at the end of the substrate 12.

The first light reflecting member 191 is disposed symmetrically or asymmetrically with respect to the center line of the LED element on both sides of the LED element with a distance (S) from the LED element, and emits light to the light emitted from the LED element. It is provided to extend so that light is emitted from the LED illumination tube outside the tube with directivity. The length of the first reflecting member is 5 times or more the width of the LED element, preferably about 10 mm to 20 mm from the substrate.

Here, the first light reflecting member 191 preferably includes a condensing reflection surface 19a on the LED element side. The condensing / reflecting surface 19a preferably includes a pseudo LED element forming surface 20b that reflects a pseudo LED element of the LED element mounted on the light directing surface 20a and the light reflecting surface facing the LED element.

The distance (S) between the LED element end and the condensing reflection surface of the first reflecting member 19 is 0.1 mm to 5.0 mm, preferably 0.5 mm to 2.0 mm. It is preferable that the elevation angle α of 19 is defined as 50 to 75 degrees, preferably 50 to 65 degrees, and the total reflectance of the reflecting member is set to 80% or more.
The interval may be zero if an electrical insulating material is provided on a part of the condensing reflection surface.

The pseudo LED element of the LED element mounted on the substrate is projected onto the condensing reflection surface 19 b of the first reflecting member 19. FIG. 6 shows a diagram in which the pseudo LED element is projected on the condensing reflection surface 19a of the first reflecting member 19 when the lower side of the LED element mounted on the substrate is viewed from the irradiation direction of the LED element.

The tubular body 10 includes a translucent cover 31 that transmits light from the LED element 13 and a tubular member 15. The tubular body 31 includes a closed space, and the closed space includes the LED element 13, the substrate 12, the substrate support member 17, the first light reflecting member 191, the second light reflecting member 193, and the third light reflecting member 195. It is preferable that each of these has a shape symmetrical with respect to the center line 61.

The end cap 50 is fitted into two end portions of a tubular structure constituted by the tubular member 15 and the translucent bar 31. The end cap 50 is provided with a power supply pin 51.

The first light reflecting member 191 includes a condensing / reflecting surface 19a at an extending portion 23 that extends toward the translucent cover 31 in a direction in which light emitted from the LED element mounted on the substrate travels. The extending portion 23 is disposed symmetrically or asymmetrically with respect to the center line of the LED element on both sides of the LED element in a direction in which light emitted from the LED element mounted on the substrate travels. The extending part 23 is arranged in a posture in which the light from the light emitting element 13 is directed to the translucent cover 31.

The first light reflecting member 19 extends along a curved shape of the first light reflecting member 191 extending at a predetermined elevation angle; an angle of 50 to 75 degrees toward the translucent cover 31 and the translucent cover 31. A second light reflecting member 193 provided by bending, a third light reflecting member 195 connecting the first light reflecting member 191 and the second light reflecting member 193 are provided. The light reflecting member 19 is not limited to the structure of the first light reflecting member 191, the second light reflecting member 193, and the third light reflecting member 195, and may be configured in a multistage structure by connecting the light reflecting members.

The first light reflecting member 191 includes a condensing reflection surface 19 a having light reflection characteristics on the surface on the LED element 13 side in the extending portion 23. The condensing and reflecting surface 19 a is preferably a curved surface that is convex toward the center line 61. The curvature of the curved surface is appropriately determined according to the required light directivity.

The second light reflecting member 193 and the third light reflecting member 195 preferably include light reflecting surfaces 193a and 195a having light reflecting characteristics on the side facing the translucent cover 31, respectively.

The pseudo LED element forming surface is defined by at least one of the total reflectance of the light reflecting surface, the elevation angle of the first light reflecting member, and the distance between the LED element installation end and the light reflecting surface of the previous reflecting member. Preferably it is formed.

The total luminous flux transmission plate preferably has a total luminous flux transmittance of 95% or more.
The total reflectance of the reflecting member is preferably defined by 80% or more.

That is, in order to direct the light emission illuminance of the LED element to be equal to or higher than that of a conventional fluorescent tube, it is preferable that the total reflectance of the condensing reflection surface of the first light reflecting member is 80% or more. Specifically, for example, silver plating, silver coating, chrome plating, or the like is preferably applied to the condensing reflection surface 19a. The illuminance at this time is determined based on the light brightness theorem that “the brightness is inversely proportional to the square of the distance between the light source and the irradiation surface”.

The light emitted from the LED element is arranged corresponding to the light reflecting surface 193a of the second light reflecting member 193 when irradiating the tube through the total light flux transmitting plate 31 via the first light reflecting member 191. The light confined in the total light flux transmission plate 31 provided and / or confined in the light confinement path 60 formed in the space between the total light flux transmission plate 31 and the second light reflecting member 193. Is preferably irradiated from the total luminous flux transmission plate 31 to the outside of the tube.

Furthermore, when the light emitted from the LED element is irradiated to the outside of the tube through the total light flux transmitting plate via the first light reflecting member 191, the first light reflecting member 191 has an elevation angle with respect to the substrate; 50 From 75 degrees to 75 degrees, preferably from 50 degrees to 65 degrees, the distance (S) between the LED element end and the first light reflecting member: 0.5 to 5.0 mm, the height of the reflector; the width of the LED element It is preferably set to 5 times or more, preferably 10 to 20 mm. With this setting, the light beam is confined in the total light beam transmission plate 31 disposed corresponding to the reflection surface of the second light reflection member 20, and / or in the space between the total light beam transmission plate and the second light reflection member. It is preferable that the confined light confined in the formed light confinement path 60 is radiated from the total luminous flux transmission plate 31 to the outside of the tube.

The light confinement path 60 formed in the space between the total light flux transmitting plate and the second light reflecting member is preferably formed by fitting the end of the second light reflecting member to the total light flux transmitting plate.

The second reflecting member and / or the total light flux transmitting plate preferably includes at least one light confinement recess 62.

Thus, the light emitted from the LED element to the outside of the tube through the total luminous flux transmitting plate is irradiated at an irradiation angle: 120 degrees to 180 degrees, a total luminous flux total luminous flux: 2000 to 3000 lm. At this time, the pseudo LED is preferably projected on the first light reflecting member.

By providing the light reflecting surface 193a of the second light reflecting member 193 with light reflecting characteristics, the light reflected from the inner surface of the translucent cover 31 is reflected by the surface, as shown in FIG. Thus, the translucent cover 31 can be passed.

The treatment for increasing the reflection efficiency of the present embodiment is silver coating, silver plating, or a coating equivalent thereto. In the case of silver coating, the total reflectance can be improved to 90%.

The light-emitting diode illumination device 1 uses a light reflecting member having the shape shown in FIGS. 2 and 3 so that the distance between the LED element and the outer peripheral surface of the light-emitting diode illumination device 1 (the part touched by the human body) is a conventional structure. Can be made longer (more than twice as long).

According to the straight tube type light emitting diode illumination device 1, the illuminance distribution can be wide angle (140 degrees or more), and the performance (illuminance and light distribution) of the conventional fluorescent lamp is 50% of the power consumption of the fluorescent lamp. This makes it possible to use energy-saving lighting sources. Specifically, the power consumption can be about 12 to 13 as compared with the fluorescent lamp, and the illuminance / PPFD can be increased 2 to 3 times (compared to the conventional LED). Contributes to safety and security without generating high heat like fluorescent tubes. Moreover, the straight tube | pipe type light emitting diode type illumination lamp 1 can be 500 g or less.

Other examples of the LED element and the light reflecting member will be described below.
As shown in FIG. 7, the two light emitting diodes 13a and 13b are arranged so as to emit light in the same direction. The two light emitting diodes 13a and 13b may be provided in a direction orthogonal to the longitudinal direction. The number of light emitting diodes 13 provided in the orthogonal direction may be three or more. The light emitting diode 13a is sandwiched between the pair of first light reflecting members 51 and the member 53, and the light emitting diode 13a side of the member 51 and the member 53 has reflection characteristics.

As shown in FIG. 8, the two light emitting diodes 13 a and 13 b are arranged to be inclined so as to irradiate light in different directions toward the outside of the illumination device.
You may provide the two light emitting diodes 13a and 13b in the direction orthogonal to a longitudinal direction.
The number of light emitting diodes 13 provided in the orthogonal direction may be three or more. The light emitting diode 13a is sandwiched between the pair of first reflecting members 51 and 53, and the first light reflecting member 51 and the member 53 have reflection characteristics on the light emitting diode 13a side. The light emitting diode 13b is sandwiched between the pair of first light reflecting member 53 and the member 55, and the light emitting diode 13b side of the first light reflecting member 53 and the member 55 has reflection characteristics.

The power source of the light emitting diode 13 is provided on the opposite side to the transparent cover 31 with respect to the first member 17, and is accommodated in a space formed by the tube body 40.
The transparent cover 31 is provided on the light emitting diode 13 side. The shape of the tube body 40 and the like is arbitrary. The present invention is not limited to the embodiment described above. That is, those skilled in the art may make various modifications, combinations, subcombinations, and alternatives regarding the components of the above-described embodiments within the technical scope of the present invention or an equivalent scope thereof.

The present invention is applicable to a light emitting diode type illumination lamp.

1 LED illuminating device 10 cylindrical tube 12 substrate 13 LED element 14 pseudo LED element 15 tube member 16 center line 17 substrate support member 19 light reflection member 191 first light reflection member 19a condensing reflection surface 193 second light reflection Member 193a Light reflecting surface 195 Third light reflecting member 195a Light reflecting surface 20a Light directing surface 20b Pseudo LED forming surface 23 First light reflecting member extension portion 31 Translucent cover 50 End cap 60 Light confinement path 62 Light confinement recess 63 power supply

Claims (14)

An LED illuminating tube comprising a total luminous flux transmissive plate disposed in the light irradiation direction;
LED elements disposed on a substrate facing the total luminous flux transmitting plate in the LED illumination tube;
LED element is driven by (1) a single power source of 5 V, 12 V or 24 V, or (2) at least a forward voltage of 1.5 V to 4.5 V, or (3) a voltage of 90 V to 240 V A driving device;
The driving device is disposed at a position that does not interfere with light emitted from the LED element,
A first light reflecting member provided with a condensing reflection surface having a light reflection characteristic disposed on the light emitting side of the LED element;
The first light reflecting member is arranged to extend in the light irradiation direction symmetrically or non-target with respect to the center line of the LED element,
The condensing reflection surface of the first light reflecting member has a light directivity forming surface for giving the light emitted from the LED element light directivity and irradiating the LED illumination tube outside the tube through the total luminous flux transmission plate,
A pseudo LED element forming surface for projecting a pseudo LED element of the LED element,
A second light reflecting member comprising a light reflecting surface disposed on the illumination tube and having a light reflecting property facing the total luminous flux transmitting plate;
The second reflecting member is disposed in the wide-angle direction outward from the end of the first reflecting member along the shape of the total luminous flux transmitting plate,
Light emitted from the LED element is confined in the total luminous flux transmission plate and / or in a space between the total luminous flux transmission plate and the second light reflecting member, and is irradiated outside the tube through the total luminous flux transmission plate. Optical confinement means for,
A light-emitting diode type illumination device in which a pseudo LED mounted on the substrate is projected on the pseudo LED element forming surface as the light is irradiated outside the illumination tube. An LED illuminating tube comprising a total luminous flux transmissive plate disposed in the light irradiation direction;
LED elements disposed on a substrate facing the total luminous flux transmitting plate in the LED illumination tube;
LED element is driven by (1) a single power source of 5 V, 12 V or 24 V, or (2) at least a forward voltage of 1.5 V to 4.5 V, or (3) a voltage of 90 V to 240 V A driving device;
The driving device is disposed at a position that does not interfere with light emitted from the LED element,
A first light reflecting member provided with a condensing reflection surface having a light reflection characteristic disposed on the light emitting side of the LED element;
The first light reflecting member is arranged to extend in the light irradiation direction symmetrically or non-target with respect to the center line of the LED element,
The condensing reflection surface of the first light reflecting member has a light directivity forming surface for giving the light emitted from the LED element light directivity and irradiating the LED illumination tube outside the tube through the total luminous flux transmission plate,
A pseudo LED element forming surface for projecting a pseudo LED element of the LED element,
A second reflecting member provided on the illumination tube and provided with a light reflecting surface facing the total luminous flux transmitting plate and having a light reflecting property;
The second reflecting member is disposed in the wide-angle direction outward from the end of the first reflecting member along the shape of the total luminous flux transmitting plate,
The light emitted from the LED element is confined in the total luminous flux transmission plate and / or in the space between the total luminous flux transmission plate and the second reflecting member and irradiated outside the tube through the total luminous flux transmission plate. Light confinement means,
Illuminance in which the pseudo LED element of the LED element disposed on the substrate is reflected on the pseudo LED formation surface when the LED element is viewed from the direction of light emitted from the LED element disposed on the substrate. A light-emitting diode illumination device. The light emitting diode type illumination device according to claim 1, further comprising a third light reflecting member that connects the first light reflecting member and the two light reflecting member. The pseudo LED element forming surface is defined and formed by the total reflectance of the first reflecting member, the elevation angle of the first reflecting member, and the distance between the LED element installation end and the first reflecting member. The light emitting diode type illumination device according to claim 1. 2. The light emitting diode illumination device according to claim 1, wherein the first light reflector is set at an elevation angle of 50 to 75 degrees with respect to the substrate. The distance between the LED element installation end and the condensing reflection surface of the front reflecting member is 0.1 mm to 5.0 mm, the elevation angle with the substrate surface is 50 degrees to 75 degrees, and the first 2. The light emitting diode type illumination device according to claim 1, wherein the height of the light reflection plate is set to 5 times or more, preferably 10 to 20 mm, of the width of the LED element. The pseudo LED element forming surface is at least one of the total reflectance of the light reflecting surface, the elevation angle of the first light reflecting member, and the interval length between the LED element installation end and the condensing reflecting surface of the reflecting member. 2. The light emitting diode type illumination device according to claim 1, wherein the number of the pseudo LED elements projected on the pseudo LED forming surface is varied and projected by changing one of them. 2. The light emitting diode illumination device according to claim 1, wherein the second reflecting member and / or the all-light transmission plate include at least one recess for confining light. 2. The light emitting diode illumination device according to claim 1, wherein the all-light transmission plate has a total light transmission of 95% or more. 2. The light emitting diode illumination device according to claim 1, wherein a total reflectance of the light reflecting member is defined by 80% or more. 2. The light emitting diode illumination device according to claim 1, wherein the light reflecting surface of the first reflecting member is different in total reflectance and / or shape between the light directivity forming surface and the pseudo LED element forming surface. . The light emitting diode illumination device according to claim 1, wherein the first and second reflecting members include heat sinks. 2. The light emitting diode illumination device according to claim 1, wherein the light emitting diode illumination device is a straight tube light emitting diode illumination device. 13. The light emitting diode type illumination device according to claim 1, wherein the light emitting diode type illumination device according to claim 1 is used for an electronic device.

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