JP3196567U - LED bulb - Google Patents

Abstract

An LED bulb that can be miniaturized and can improve color rendering. In an LED bulb, a base 13 is disposed on an LED unit 11 via a base connection part 12. The LED unit includes a side substrate 11B on which at least one first color LED 11A that emits a first color is mounted, and at least one that emits a second color different from the first color at one end of the side substrate. And a ceiling substrate 11D on which the second color LED 11C is mounted. The emission color of the second color LED preferably has a lower color temperature than the emission color of the first color LED. [Selection] Figure 1

Description

  The present invention relates to an LED bulb using an LED as a light source.

  2. Description of the Related Art In recent years, with the improvement of LED luminous efficiency, a bulb-type LED bulb using an LED as a light source is known as an alternative to incandescent bulbs and bulb-type fluorescent lamps. As such an LED bulb, for example, a configuration is known in which a planar substrate having LEDs is disposed and a lighting circuit for LED lighting is accommodated in an outer portion via an insulating member (for example, , See Patent Document 1).

  Moreover, it is known that as the temperature rises, the light output decreases and the life of the LED decreases. Therefore, it is required to suppress heat generation. As a means for solving the problem, for example, a method of dissipating heat generated by the LED to the peripheral portion by heat conduction using an outer member as a metal material is generally used.

JP 2006-313717 A (pages 5 to 6, FIG. 2)

  However, in the case of the LED described in Patent Document 1, since the light source substrate on which the LED is mounted and the lighting circuit substrate for LED lighting are separately provided, each space is required and the LED in the outer portion is also provided. Therefore, there is a problem that it is difficult to reduce the size.

  Furthermore, in the case of an LED bulb having an LED heat dissipation countermeasure structure in the outer part, an environment where the ambient temperature can be 36 ° C. or higher even if the LED bulb itself does not generate heat, such as a heat-insulating construction lighting fixture SB type, SGI When used for so-called downlight lighting fixtures such as the shape and the SG type, there is a problem that the heat of the surroundings is transmitted to the LED through the outer portion, and the performance and life of the LED are reduced.

  In general, LED light bulbs have low color rendering properties, and have a problem that the complexion looks bad or the dish does not look delicious.

  The present invention has been made based on such a problem, and an object of the present invention is to provide an LED bulb that can be miniaturized and can improve color rendering.

  The LED bulb according to the present invention is a side board on which at least one first color LED that emits a first color is mounted. The LED unit includes a base connected to the LED unit via a base connection portion. And a ceiling substrate on which at least one second color LED that emits a second color different from the first color is mounted and disposed at one end of the side substrate, and the other end of the side substrate A base connection part is disposed on the part side.

  According to the LED bulb of the present invention, the ceiling substrate on which the second color LED is mounted is disposed on one end of the side substrate on which the first color LED is mounted, and the base on the other end side of the side substrate. Since the connection portion is disposed, the lighting circuit can be accommodated inside the LED unit and the base connection portion, and the size can be reduced. In addition, since the emission color of the first color LED mounted on the side board and the second color LED mounted on the ceiling board are made different from each other, the color rendering property is improved by combining those having different color temperatures. Can do.

  In particular, the emission color of the second color LED is lower in color temperature than the emission color of the first color LED, for example, the emission color of the first color LED is white and the emission color of the second color LED is the bulb color. Then, the entire space can be brightly illuminated by the first color LED on the side substrate, and redness can be added by the second color LED on the ceiling substrate, so that the color rendering can be improved.

It is a figure showing the external appearance structure of the LED bulb which concerns on one embodiment of this invention. It is a fragmentary sectional view showing the internal structure of the LED bulb shown in FIG.

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

  FIG. 1 illustrates an external configuration of an LED bulb 10 according to the present embodiment, where (A) illustrates a configuration viewed from the side, and (B) illustrates a configuration viewed from above. FIG. 2 shows the internal structure of the LED bulb 10 shown in FIG.

  The LED light bulb 10 is, for example, a mini-krypton lamp type, and can be used for a downlight lighting apparatus or the like that is embedded in a ceiling. In the LED bulb 10, for example, a base 13 is disposed on an LED unit 11 via a base connection part 12. The LED unit 11 has a side substrate 11B on which at least one first color LED 11A that emits a first color is mounted, and is disposed at one end of the side substrate 11B, and has a second color different from the first color. And a ceiling substrate 11D on which at least one second color LED 11C that emits light is mounted.

  For example, the first color LED 11A and the second color LED 11C are different in the color temperature of the emission color, and are configured such that the color temperature of the emission color of the second color LED 11C is lower than the emission color of the first color LED 11A. It is preferable that Specifically, for example, the emission color of the first color LED is preferably white, and the emission color of the second color LED is preferably a light bulb color. This is because the color rendering can be enhanced by brightly illuminating the entire space with the first color LED 11A on the side substrate 11B and adding redness with the second color LED 11C on the ceiling substrate 11D. Further, by lowering the color temperature of the second color LED 11C of the ceiling substrate 11D, it is possible to suppress ultraviolet ray burn and to suppress damage to fresh products.

  For example, the LED unit 11 preferably has a frustum shape or a column shape, and more preferably a frustum shape. This is because a higher effect can be obtained. The angle θ of the side substrate 11B with respect to the ceiling substrate 11D is preferably about 40 to 90 degrees, for example. 1 and 2 show the case where the LED unit 11 is configured in a truncated cone shape, it may be a truncated pyramid shape. Further, in the case of a columnar shape, it may be a columnar shape or a prismatic shape. Further, FIG. 1 shows a case where eight first-color LEDs 11A are mounted on the side board 11B and four second-color LEDs 11C are mounted on the ceiling board 11D. Good.

  The base connection part 12 and the base 13 are arranged on the other end side of the side substrate 11 </ b> B, that is, on the other end side of the LED unit 11. For example, a screw-in type called E17 is usually used as the base 13, but it is not limited to this as long as it can be attached to a socket to which a general lighting bulb is attached.

  The inside of the LED unit 11 and the base connection portion 12 is hollow, and a power supply board 14 is disposed on the other end side of the LED unit 11, for example. For example, a lighting circuit 15 is disposed inside the LED unit 11 and the base connection part 12, and is supplied with power from the power source via the base 13. The lighting circuit 15 includes, for example, a circuit component 15A, a diode bridge 15B, a capacitor 15C, and a current limiting element 15D. The commercial AC power supplied from the base 13 is a first color LED 11A and a second color LED 11C with constant voltage and constant current rectified and smoothed by a diode bridge 15B, a capacitor 15C, and a current limiting element 15D mounted on the lighting circuit 15. Lights up.

  The current limiting element 15D is constituted by, for example, a resistance element or a constant current diode, and limits the current value supplied to the first color LED 11A and the second color LED 11C. The lighting circuit 15 using the current limiting element 15D is configured to supply power to the first color LED 11A and the second color LED 11C with a current value that suppresses self-heating.

  The outside of the LED unit 11 is covered with a translucent cover 16, for example. In FIG. 1A, the translucent cover 16 is represented by a broken line, and the display is omitted in FIG. The translucent cover 16 is arrange | positioned by an opening end being fitted by the fitting part 12A of the nozzle | cap | die connection part 12, for example. The translucent cover 16 and the base connection part 12 are preferably made of polycarbonate, for example. Since heat is less likely to be transmitted than metal materials, external heat is less likely to be transmitted to the first color LED 11A and the second color LED 11C, and it is possible to suppress an increase in the temperature in the vicinity thereof, as well as translucency and difficulty. It is because it has flammability. If there is a material satisfying these conditions or more, it is also possible to use it.

  Thus, according to the present embodiment, the ceiling substrate 11D on which the second color LED 11C is mounted is disposed on one end of the side substrate 11B on which the first color LED 11A is mounted, and the other side of the side substrate 11B is disposed. Since the base connection part 12 is arranged on the end side, the lighting circuit 15 can be housed inside the LED unit 11 and the base connection part 12, and the size can be reduced. In addition, since the light emission colors of the first color LED 11A mounted on the side substrate 11B and the second color LED 11C mounted on the ceiling substrate 11D are made different from each other, color rendering can be achieved by combining different color temperatures. Can be increased.

  In particular, the emission color of the second color LED 11C is lower than the emission color of the first color LED 11A, for example, the emission color of the first color LED 11A is white, and the emission color of the second color LED 11C is a light bulb color. Then, the entire space can be brightly illuminated by the first color LED 11A of the side substrate 11B, and redness can be added by the second color LED 11C of the ceiling substrate 11D, thereby improving the color rendering.

  The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above embodiment, the case of the mini-krypton lamp type has been described, but the present invention can be applied to other types of light bulbs. Moreover, it can also be used for lighting fixtures other than a downlight lighting fixture.

  It can be used as a light bulb for lighting equipment.

  DESCRIPTION OF SYMBOLS 10 ... LED bulb, 11 ... LED unit, 11A ... 1st color LED, 11B ... Side board, 11C ... 2nd color LED, 11D ... Ceiling board, 12 ... Base connection part, 12A ... Fitting part, 13 ... Base, DESCRIPTION OF SYMBOLS 14 ... Power supply board, 15 ... Lighting circuit, 15A ... Circuit component, 15B ... Diode bridge, 15C ... Capacitor, 15D ... Current limiting element, 16 ... Translucent cover

Claims (5)

An LED bulb in which a base is arranged on the LED unit via a base connection part,
The LED unit is disposed on a side substrate on which at least one first color LED that emits a first color is mounted and one end of the side substrate, and emits a second color different from the first color. A ceiling substrate on which at least one second color LED is mounted;
An LED bulb characterized in that a base connection part is disposed on the other end side of the side substrate.   2. The LED bulb according to claim 1, wherein the emission color of the second color LED has a color temperature lower than that of the emission color of the first color LED.   3. The LED bulb according to claim 1, wherein the emission color of the first color LED is white, and the emission color of the second color LED is a bulb color. 4.   The LED bulb according to any one of claims 1 to 3, wherein the LED unit has a frustum shape or a column shape.   The LED bulb according to any one of claims 1 to 4, wherein a lighting circuit is provided inside the LED unit and the base connection part.

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