JP4207027B2 - LED lighting device - Google Patents

Description

  The present invention provides an LED illumination including an LED unit including a plurality of LED (light emitting diode) elements, an LED power supply unit for supplying power to the LED unit, and a lens body including a lens disposed in front of the LED elements. It relates to the device.

  2. Description of the Related Art Conventionally, as a lighting apparatus using LEDs, products using features such as long life and small size have been developed and commercialized.

Luminaires using LEDs are commercialized as light sources for footlamps that illuminate the feet at night, such as in hospital rooms and living rooms, and as light sources for night lights, spot-like light sources, and light sources for display. These products have a lifetime of 4 to 10 years as a lighting fixture without replacing the LED due to the feature of the LED's semi-permanent lifetime. (For example, see Patent Document 1)
Japanese Patent Laid-Open No. 11-163410

  However, basically, LEDs are only used as an auxiliary light source for display or the like, and there are many problems in application as a main light source with high illuminance. . If the light output of an LED, which should have a semi-permanent lifetime, is increased in order to obtain high illuminance, the resin covering the LED chip will deteriorate due to its own light and temperature, causing discoloration, etc. This is because the output decreases and the required optical output cannot be obtained. Here, the point in time when the required light output cannot be obtained due to the decrease in the light output is defined as the end of the lifetime of the LED.

  As described above, the deterioration of the resin is accelerated as the light is emitted, and the temperature is accelerated as the light is emitted, so that the life of the LED is shortened. Measures are taken to lower the temperature by turning on the light, thereby extending the life of the LED, and to compensate for low illumination by increasing the number of LEDs.

  In recent years, blue LEDs have been developed, and white light sources can be obtained with LEDs. Therefore, white LEDs can be used as lighting fixtures, particularly as a main light source. However, in order to ensure the brightness while extending the life as described above, the number of LEDs increases, and particularly the high-brightness blue LED has a very high unit price, so the cost as a lighting fixture is very high. Become. Therefore, the current situation is that LED lighting devices as main light sources are not so popular.

  This invention is made | formed in view of the said reason, The objective is to increase the light output per LED element, and to use an LED element as a main light source, and to improve the lifetime as a lighting fixture. It is providing the LED illuminating device which can be extended.

  The invention of claim 1 includes an LED unit including a plurality of LED elements, an LED power supply unit for supplying power to the LED unit, a lens body including a lens disposed in front of the LED elements, and the LED power supply. A lighting fixture body having a built-in portion, wherein at least the LED elements of the LED unit are configured to be replaceable, and the LED power supply portion built in the lighting fixture body is connected to a connector, and the LED power source A switching means for switching a level of an output voltage from the LED power supply unit to the LED unit is provided in at least one connector connection shape of the supply unit and the LED unit.

According to the present invention, the light output per LED element can be increased and the LED element can be used as a main light source, and the lifetime as a lighting fixture can be extended. Furthermore, the lifetime of the LED unit can be extended and the power consumption during illumination can be reduced .

  As described above, the present invention has an effect that the light output per LED element can be increased and the LED element can be used as a main light source, and the life as a lighting fixture can be extended.

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

(Basic configuration 1)
6 is an exploded perspective view showing a part of the basic configuration 1 of the LED lighting device of the present invention, FIG. 7 is a sectional view of the LED lighting device, and FIG. 8 is a circuit diagram of the LED unit shown in FIG.

  As shown in FIG. 7, the LED lighting device 11 of the basic configuration 1 is installed on the back surface of the ceiling board CB, and rectifies and smoothes the AC voltage from the commercial power source (AC power source) including the step-down to a predetermined level. In addition to the LED power supply unit 110 that obtains a low direct current voltage, the main body (luminaire main body) 111, the outer casing (frame) 112, the LED unit 113, and the lens body 114 are attached to the surface of the ceiling plate CB. The main body part is provided. In the example of FIG. 7, the main body 111 and the instrument shell 112 constitute a vessel.

  As shown in FIG. 6, the main body 111 is formed in a shape integrally including a circular bottom portion 111 a and a cylindrical portion 111 b extending downward from the outer peripheral edge by, for example, insulating resin molding. . A connection portion (connector) 111c that is electrically connected to the output of the LED power supply portion 110 via the power supply connection line W1 that is passed through the hole H of the ceiling plate CB is provided at the center of the bottom surface of the bottom portion 111a. In addition, mounting holes 111d for screwing and fixing the main body 111 to the surface of the ceiling board CB are formed on both sides of the pair of connecting portions 111c. On the other hand, a thread groove 111e is formed on the outer peripheral wall of the cylindrical portion 111b.

  The instrument shell 112 is formed into a shape integrally including a circular bottom 112a and a cylindrical portion 112b extending upward from the outer peripheral edge by, for example, insulating resin molding. A circular hole 112c is formed in the center of the bottom portion 112a, while a screw groove 112d that fits into the screw groove 111e of the main body 111 is formed in the inner peripheral wall of the cylindrical portion 112b.

  The LED unit 113 is a circular mounting substrate (printed circuit board) on which electronic components are mounted and detachably (replaceable) inside the main body 111. The connection portion 113a connected to the connection portion 111c of the main body 111 is connected to the LED unit 113. It is provided in the center of the upper surface of the LED unit 113. In the example of FIG. 8, the LED unit 113 includes a light emitting unit 113b configured by connecting in parallel four sets of three LEDs, a transistor Tr, and a resistor R, a capacitor C1, a transistor Tr1, A power supply unit 113c configured by resistors R1 to R3, mirror-connected to each pair of transistors Tr of the light emitting unit 113b, and causing the same constant current to flow through each set of LEDs of the light emitting unit 113b is provided (mirror circuit configuration). . In addition, 113d in FIG. 6 is a hole.

  The lens body 114 is formed in a shape integrally including a circular bottom 114a and a cylindrical portion 114b extending upward from the outer peripheral edge by, for example, insulating resin molding. On the bottom 114a, a pair of pins 114c that fit into the pair of holes 113d of the LED unit 113 are erected upward, and each lens for controlling the light of the LED in front of each LED of the LED unit 113. 114d is arranged. The lens body 114 is also housed in the main body 111 so as to be detachable (exchangeable).

  Next, the procedure for attaching the LED lighting device 11 to the ceiling plate CB will be described. First, the main body 111 is screwed at the position of each attachment hole 111d to fix the main body 111 to the surface of the ceiling plate CB. Thereafter, each pin 114c of the lens body 114 is inserted into each hole 113d of the LED unit 113, and the LED unit 113 is attached to the lens body 114. Then, the connection portion 113 a of the LED unit 113 is connected to the connection portion 111 c of the main body 111 with a connector, and the LED unit 113 and the lens body 114 are accommodated in the main body 111. Thereafter, the thread groove 112 d of the instrument shell 112 is screwed to the thread groove 111 e of the main body 111, and the instrument shell 112 is attached to the main body 111.

  As described above, in the basic configuration 1, since the LED unit 113 on which the LED is mounted is configured to be detachable from the LED lighting device 11, the life of the LED lighting device 11 is extended simply by replacing the LED unit 113. The current output to each LED can be increased to increase the light output from each LED, and the brightness as the main light source can be secured with a smaller number of LEDs.

(Basic configuration 2)
FIG. 9 is a cross-sectional view of the LED illumination device of the basic configuration 2.

  As shown in FIG. 9, the LED illumination device 18 of the basic configuration 2 includes an instrument shell 112, an LED unit 113, and a lens body 114 in the same manner as the basic configuration 1. A power supply built-in main body 181 in which an LED power supply unit 110 is built in 111 is provided.

  With the basic configuration 2 having the above-described configuration, the same effects as the basic configuration 1 can be obtained. In addition, in the configuration of the basic configuration 2, there is a drawback that the height of the LED lighting device is higher than when the LED power supply unit 110 is separately provided, but an AC power source from the back of the ceiling is directly connected to the LED lighting device. Therefore, it can be easily deployed as a sealing device used in general households.

(Basic configuration 3)
FIG. 1 is a cross-sectional view of the LED illumination device having the basic configuration 3.

  As shown in FIG. 1, the LED illumination device 22 of the basic configuration 3 includes an instrument shell 112, an LED unit 113, and a lens body 114 in the same manner as the basic configuration 2. The power supply built-in main body 221 further includes a switch SW1 for switching the level of the output voltage to the unit 113 between a high level (for example, 24V) and a low level (for example, 12V).

  Here, when the LED current is increased to increase the light emission of the LED, the translucent resin portion is discolored due to deterioration of the resin portion covering the LED chip, and the light output as the LED element is reduced. In the basic configuration 3, as in the basic configurations 1 and 2, the LED unit 113 is replaceable. Therefore, the life of the LED lighting device 22 can be extended. Thereby, light emission of LED can be strengthened and it can be set as high illumination intensity, and the LED lighting apparatus 22 can be used as main illumination.

  In the example of FIG. 1, since the switch SW1 for switching the level of the output voltage to the LED unit 113 is provided, the LED lighting device 22 can be used as the main lighting if switched to a high level (high illuminance / exchange promotion). Type), switching to a low level can extend the life of the LED unit 113 of the LED lighting device 22 (low illuminance / long life type). By switching the level of the output voltage to the LED unit 113, the value of the current flowing through each LED changes, and the life of each LED changes.

  If you want to use the auxiliary lighting semi-permanently in some circumstances rather than as the main lighting, if you use it as the auxiliary lighting during the daytime and use it as the main lighting when it gets dark at night The service life is extended and the number of replacements of the LED unit 113 can be reduced. Moreover, also from the point of the power consumption of illumination, the power consumption of illumination can be reduced by changing a light output according to required brightness.

(First embodiment)
FIG. 2 is a cross-sectional view of the LED illumination device according to the first embodiment of the present invention, and FIG. 3 is a diagram illustrating an example of the connection portion of FIG.

  As shown in FIG. 2, the LED illumination device 23 according to the first embodiment includes an LED lens body 135 in which the LED unit 113 and the lens body 114 are integrated instead of the LED unit 113 and the lens body 114. The connection is made in the same manner as the LED lighting device 18 of the basic configuration 2 except that the connection portions 231c and 233a (233a ′) shown in FIG.

  When the connecting portions 231c and 233a shown in FIG. 3A are used, the output voltage from the power supply built-in main body 181 to the LED lens body 135 becomes 24V, and the connecting portions 231c and 233a ′ shown in FIG. Sometimes, the output voltage from the power supply built-in main body 181 to the LED lens body 135 becomes 12V.

  In the basic configuration 3, a switch is provided in the power supply built-in main body as a means for switching the output voltage of the power supply built-in main body. A connection is provided. In the example of FIG. 3, since the connection portion 231c has a common specification, the LED lens body 135 determines which of the connection portions 233a and 233a ′ having different connection pin pitches is mounted. This is because the output voltage to the lens body 135 is switched. In this way, the output voltage from the power supply built-in main body 181 to the LED lens body 135 can be switched only by changing the distance between the connection pins of the connection portion on the LED lens body 135 side. The LED lens body 135 having different specifications and the light distribution of the lens 114d can be handled, and a voltage suitable for the LED lens body 135 can be applied.

  In addition to the example of FIG. 3, the connection pin pitch is the same, and the power supply built-in main body 181 to the LED lens body according to the connection angle of the connection portion on the LED lens body 135 side with respect to the connection portion on the power supply built-in main body 181 side. The output voltage to 135 may be switched. For example, at the connection angle (direction) in FIG. 3A, the output voltage from the power supply built-in main body 181 to the LED lens body 135 is 24 V, and at the connection angle in FIG. The output voltage to the LED lens body 135 may be 12V. In this case, the output voltage of the power supply built-in main body 181 with respect to one LED lens body 135 can be freely selected by simply changing the connection angle. Two types of low illuminance and long life type can be used.

  Moreover, although the pin connection structure was demonstrated above, the connection structure of another shape may be sufficient as long as the same effect can be achieved.

( Reference example )
FIG. 4 is a cross-sectional view of a reference example of the LED lighting device, and FIG. 5 is a circuit diagram of the LED unit of FIG.

As shown in FIG. 4 , the LED lighting device 24 as a reference example is similar to the LED lighting device 18 of the basic configuration 2 except that the LED unit 113 is further mounted instead of the LED unit 113. Composed.

  In the example of FIG. 5, the resistor R3 (see FIG. 8) is configured by a series circuit of resistors R3a and R3b, and the switch SW2 is connected in parallel to one of the resistors R3b. It is provided as means for switching the output voltage to the LED unit 243. By switching the switch SW2 on / off, the resistance value of the constant current circuit that keeps the current flowing through each LED constant is switched, and the current value flowing through each LED changes. Specifically, when the switch SW2 is turned on, the current of the mirror circuit is determined by the transistor Tr1 and the resistors R1, R2, and R3a of the mirror circuit. When the switch SW2 is turned off, the resistor R3b is interposed in series with the resistor R3a, and thus flows. The current is reduced. Therefore, by turning on or off the switch SW2, it can be switched to a high illuminance type or a low illuminance type, and the user can switch the light output while the LED lighting device 24 is turned on or according to the specification. .

It is sectional drawing of the LED lighting apparatus of the basic composition 3. It is sectional drawing of the LED lighting apparatus of 1st Embodiment which concerns on this invention. It is a figure which shows the example of the connection part of FIG. It is a cross-sectional view of a reference example of L ED lighting device. It is a circuit diagram of the LED unit of FIG. It is a disassembled perspective view which shows a part of LED lighting apparatus of the basic composition 1. It is sectional drawing of the LED lighting apparatus of the basic composition 1. It is a circuit diagram of the LED unit shown in FIG. It is sectional drawing of the LED lighting apparatus of the basic composition 2.

Explanation of symbols

22 LED illuminating device 112 Instrument outline 113 LED unit 114 Lens body 114d Lens 221 Power supply built-in main body SW1 switch

Claims (1)

An LED unit including a plurality of LED elements, an LED power supply unit for supplying power to the LED unit, a lens body including a lens disposed in front of the LED elements, and a luminaire main body incorporating the LED power supply unit At least the LED element of the LED unit is configured to be exchangeable, and the LED unit is connected to an LED power supply unit built in the lighting fixture body, and at least the LED power supply unit and the LED unit are connected. The LED lighting device according to claim 1, wherein a switching means for switching a level of an output voltage from the LED power supply unit to the LED unit is provided in one connector connection shape .

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