JP3221464U - LED bulb with excellent overall emission characteristics - Google Patents

Abstract

The present invention provides an LED bulb which can be mounted in a tungsten bulb and has excellent overall light emission characteristics. An LED light bulb mainly includes a bulb 1, a cap 2, an LED light emitting body 3 capable of effectively emitting light entirely installed in the bulb 1, and a gallium nitride transistor ( A drive circuit substrate 4 having a GAN FET). The use of the LED light emitters in which the LED chips 31 having no reflecting plate are distributed in the form of saw teeth and packaged enables effective light emission over the entire surface. In addition, gallium nitride transistors have the advantages of high efficiency, high frequency, low duty ratio power conversion, and further reduce the size of the drive circuit board 4 while further enhancing the light emission efficiency of the LED light emitter 3. It can be installed in the lamp of a tungsten bulb without being limited by the size of the lamp. [Selected figure] Figure 1

Description

  The present invention relates to a light bulb using an LED as a light emitter, and more particularly to an LED light bulb having excellent overall light emission characteristics.

  In general, when LEDs are used as solid cold light sources, advantages such as energy saving, environmental protection, and long life can be obtained, and are already mainstream in the lighting field.

  However, a conventional LED lamp, particularly an LED bulb type lamp, is provided with a substrate or a base on which a plurality of LED chips are installed in the bulb in order to pursue emission luminance, and a drive circuit internally installed in a base The LED chip is driven to emit light. However, in the embodiment in which the LED chip is mounted on the substrate, the light emission direction is limited, and in the embodiment in which the LED chip is mounted on the pillar, the overall light emission characteristics are improved. Since sapphire was used as the support member and the reflection plate was applied to the support member, the overall light emission characteristics of the LED chip were not excellent.

  Furthermore, although a conventional transistor is used as a drive circuit to drive an LED chip to emit light, the volume of the transistor is large, so the size of the circuit board of the drive circuit can not be reduced, and can not be installed inside the lamp cap became. Because of this, the base must be added between the bulb and the base to mount the circuit board, which makes the LED bulb much larger in volume than the conventional tungsten bulb and mounted in the conventional bulb. It became impossible.

  Then, the present inventor considered that the above-mentioned fault could be improved, and as a result of earnestly examining, it came to the proposal of the present invention which effectively improves the above-mentioned subject by rational design.

  The present invention has been made in view of such conventional problems. SUMMARY OF THE INVENTION In order to solve the above problems, the present invention aims to provide an LED bulb having excellent overall emission characteristics. That is, by using the LED light emitters in which LED chips not having a reflector are distributed and packaged in a sawtooth shape, light is emitted efficiently over the entire surface.

  Another object of the present invention is to use a drive circuit substrate having a gallium nitride transistor to drive the LED light emitter while further enhancing the luminous efficiency of the LED light emitter by virtue of the high efficiency, high frequency and low duty ratio power conversion of the gallium nitride transistor. The size of the circuit board is also reduced, allowing the bulb to be designed to be the same size as a conventional bulb without being limited by the size of the drive circuit board, and to be installable in a conventional lamp.

  In order to solve the above problems, an LED bulb having excellent overall emission characteristics according to an aspect of the present invention comprises a bulb, a base, and an LED light emitter capable of emitting light entirely which is internally provided in the bulb; And a drive circuit substrate provided in the base and having a gallium nitride transistor (GAN FET). The bulb is a hollow sphere made of a translucent material, and the mouthpiece is disposed at one end of the bulb and has an end portion serving as an anode and a cathode for feeding power and a thread portion. In the LED light emitter, a plurality of LED chips not having a reflection plate are distributed and arranged in a sawtooth shape, and the LED chips are connected by a lead, and the anode lead and the cathode lead are connected to the leading and trailing LED chips It is connected and then packaged with a thermally conductive insulating colloid. The drive circuit substrate having the gallium nitride transistor (GAN FET) is electrically connected to the anode lead and the cathode lead of the LED light emitter, and the input part of the anode and the cathode of the power supply of the drive circuit substrate is the lead by the lead. The LED light emitter is driven by the drive circuit board to emit light after being connected to the screw thread portion and the end portion and the cap is connected to a power source.

FIG. 2 is a schematic view of an LED bulb having an excellent overall emission characteristic according to the present invention; FIG. 2 is a schematic view illustrating an LED bulb having excellent overall emission characteristics according to the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It is needless to say that the present invention is not limited to the following examples, and can be arbitrarily changed without departing from the scope of the present invention.

  The LED bulb having an excellent overall emission characteristic according to the present invention mainly comprises a bulb 1, a cap 2, an LED light emitting body 3 capable of effectively emitting light entirely installed in the bulb 1, and the cap 2 inside. And a drive circuit board 4 provided with a gallium nitride transistor (GAN FET) 41 (see FIG. 1).

  The bulb 1 is a hollow sphere made of a translucent material, and is generally made of a glass material. The mouthpiece 2 is disposed at one end of the valve 1 and has an end 21 and a thread 22 serving as an anode and a cathode for feeding.

  In the LED light emitting body 3, after the plurality of LED chips 31 not having a reflection plate are distributed and arranged in a sawtooth shape, the LED chips 31 are connected by the conducting wire 311, and the anode conducting wire 32 and the cathode conducting wire 33 lead and It is connected to the last LED chip 31 and then packaged into a plate by the thermally conductive insulating colloid 34. Further, one ends of the anode lead 32 and the cathode lead 33 are respectively extended to the outside of the thermally conductive insulating colloid 34.

  The driving circuit substrate 4 having the gallium nitride transistor (GAN FET) 41 is electrically connected to one end of the anode lead 32 and the cathode lead 33 of the LED light emitter 3 exposed to the outside of the thermally conductive insulating colloid 34, The input part of the anode and the cathode of the power supply of the drive circuit board 4 is connected to the screw thread 22 and the end 21 of the mouthpiece 2 by a conducting wire, and after the mouthpiece 2 is connected to the power supply, the drive circuit board 4 is used. The LED light emitter 3 is driven to emit light.

  As described above, the advantage of the present invention is the outer peripheral surface of each LED chip 31 by using the LED light emitter 3 in which the LED chips 31 without the reflector are distributed and packaged in a sawtooth shape. All emit light to realize excellent overall light emission characteristics. Further, since the heat generated by the LED chips 31 distributed in a sawtooth shape is dispersed, the heat is not concentrated at one place, the luminous efficiency of the LED chips 31 is increased, and the life is also extended.

  Another advantage of the present invention is that, by using a drive circuit substrate having a gallium nitride transistor, driving is performed while the luminous efficiency of the LED light emitter is further improved by the advantages of high efficiency, high frequency and low duty ratio power conversion of the gallium nitride transistor. The size of the circuit board is also reduced, allowing the bulb to be designed to be the same size as a conventional bulb without being limited by the size of the drive circuit board, and to be installable in a conventional lamp.

  As mentioned above, although the embodiment of the present invention was explained in full detail with reference to drawings, a concrete composition is not restricted to this embodiment, Design change of the range which does not deviate from the gist of the present invention, etc. are included.

Reference Signs List 1 bulb 2 cap 21 end 22 thread 3 LED light emitter 31 LED chip 311 lead 32 anode lead 33 cathode lead 34 thermally conductive insulating colloid 4 drive circuit board

Claims (1)

  A bulb, a cap, an LED light emitting body capable of effectively emitting light entirely provided in the bulb, and a drive circuit board provided in the cap and having a gallium nitride transistor; The base is a hollow sphere made of light material, the base is installed at one end of the bulb and has an end and a thread as an anode and a cathode for feeding, and the LED light emitter is a reflector After the plurality of LED chips not provided are arranged in a sawtooth shape, the LED chips are connected by a wire, the anode lead and the cathode lead are connected to the first and last LED chips, and then thermally conductive. A drive circuit substrate packaged with an insulating colloid and having the gallium nitride transistor is electrically connected to the anode lead and the cathode lead of the LED light emitter. And the input part of the anode and the cathode of the power supply of the drive circuit board are connected to the screw thread and the end of the base by a conducting wire, and after being connected to the power supply by the base, the LED by the drive circuit board An LED bulb having excellent overall light emission characteristics, characterized in that a light emitter is driven to emit light.