KR200424112Y1 - Illuminating apparatus using light emitting diods - Google Patents

Abstract

The present invention relates to a light emitting diode illumination device, and more particularly, the illumination device according to the present invention, the cap surrounding the light emitting light source portion is configured in a cylindrical shape, the inner surface of the side of the cap is embossed, The cylindrical cap has a recess formed in the upper portion of the cap concave with respect to the emission direction of the light, the inner side of the recess of the cylindrical cap from the end of the head and the head is formed flat in the center about the central axis of the cylinder And an inclined portion formed to be inclined upwardly toward an end portion, wherein the outer portion of the concave portion is formed at a position corresponding to the head portion at a position corresponding to the head portion and is convex in a hemispherical shape toward the light emitting direction and from the end of the central portion toward the end of the cylindrical cap. It has a comb pattern part which is formed radially convex. According to the present invention, the light emitted from the light emitting diode device is prevented from being unnecessarily consumed by total reflection, thereby improving the lighting efficiency and at the same time achieving the same lighting effect with low power consumption. In addition, the lighting device of the present invention, the light emitting diode is operated by the current accumulated by the power storage element for a predetermined time can reduce the power consumption by the AC voltage source.

Light Emitting Diode, Cap, Power Consumption

Description

Light Emitting Diode Lighting Device {ILLUMINATING APPARATUS USING LIGHT EMITTING DIODS}

1 is a perspective view showing a cap and a housing of the lighting apparatus according to the present invention.

FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1.

3 is a bottom view of the cap according to the present invention.

4 is a view showing the configuration of the light emitting unit of the lighting apparatus according to the present invention.

5 is a circuit diagram of a lighting apparatus according to the present invention.

6 is a view showing a lighting apparatus according to the prior art.

<Description of the symbols for the main parts of the drawings>

1: Lighting device

10: light emitting part

11: light emitting chip

12, 13: leadframe

14: bonding wire

15: substrate

16: housing

17: base part

20: cap

21: recess

22: side

23: head

24: inclined portion

25: center part

26: comb pattern part

27: inner surface of the cap side

28: home

29: turning

The present invention relates to a lighting device using a light emitting diode, and more particularly, to prevent the light emitted from the light emitting diode device from being consumed unnecessarily by total reflection, thereby improving the lighting efficiency and at the same time having the same lighting effect with low power consumption. It relates to a lighting device that can be obtained.

In general, a lighting device using the incandescent lamps that do not require a lot of initial installation cost for road lights or traffic lights, such as incandescent lamps, although the price of the bulb is low, but the life is short and the power consumption is high. Therefore, the lighting device using such an incandescent lamp has to replace the bulb frequently, there is a problem that the replacement is expensive, in the long run because of the high cost, including labor costs.

As an alternative to a lighting device using such an incandescent lamp, a lighting device using a light emitting diode has been proposed.

A light emitting diode is a semiconductor device that generates a small number of carriers (electrons or holes) injected by using a pn junction structure of a semiconductor, and emits light by recombination of them. Light Emitting Diode), which emits light at lower voltage and consumes less power than lamps using tungsten filament. Since the filament is not heated and shining, it generates little heat and has a long life and has been widely used in various display devices for a long time. .

LED has a small size and low power consumption, so it can be used as a small battery for a long time, and is widely used in various forms in place of fluorescent or incandescent lamps.

In the conventional lighting apparatus using such an LED, as shown in FIG. 6, a pair of lead-frames 53 and 54, a light emitting diode 51, and a bonding wire 55 are shown. And the cap 52 or the like.

The pair of lead frames 53 and 54 are formed of a conductive metal, and a light emitting diode 51 is mounted on one side of the lead frame, and the lead frame is mounted on a substrate on which a printed circuit is formed. One end of the bonding wire 55 is connected to two electrode pads of the light emitting diode 51, and the other end is connected to the substrate to electrically connect the two, and together with the lead frames 53 and 54, the light emitting diode ( 51) Apply a current. The cap 52 is formed by molding an epoxy resin, which is a translucent resin, on a region surrounding the substrate and the light emitting diode.

In the light emitting light source shown in FIG. 6, the light emitted from the light emitting diode 51 is emitted forward without being blocked.

However, in such a light emitting light source, since only light emitted forward from the light emitting diode 51 is used, light utilization efficiency is low. The light emitted forward from the light emitting diode is emitted from the light emitting source as it is, but the light emitted in an oblique direction from the light emitting diode is totally reflected at the surface of the cap or scattered at the inner surface of the cap, resulting in a loss, resulting in light utilization efficiency. There was a problem of being lowered.

The present invention is to solve the above-mentioned problems of the prior art, the upper part of the cap is formed concave with respect to the light output direction, and the embossing process on the side of the cap to reflect the scattered light to increase the utilization efficiency of the light For the purpose of

The present invention also provides a lighting device that can significantly reduce power consumption compared to the conventional LED lighting device by emitting the LED using the accumulated current even if the current of the lighting device is turned off using the inductor, capacitor and transistor on the printed circuit board. To provide a different purpose.

In order to achieve the above object, a lighting apparatus using a light emitting diode according to the present invention is composed of a plurality of light emitting chips, a lead frame on which the light emitting chip is mounted, and a bonding wire connected to the lead frame and the light emitting chip. A plurality of light emitting part; A substrate portion on which the plurality of light emitting light source portions are mounted, a circuit pattern electrically connected to the light emitting light source portion, and a plurality of substrate portion fixing holes formed thereon; A housing having a plurality of fixing protrusions inserted into the fixing portion of the substrate; A base part fixed to the housing and mounted with a circuit part; And a cap surrounding the plurality of light emitting sources, wherein the cap is formed in a cylindrical shape, and an inner surface of the side portion of the cap is embossed.

In addition, in the lighting apparatus according to the present invention, the cylindrical cap has a concave portion formed concave with respect to the emission direction of the light on the top of the cap, the inner side of the concave portion is formed flat in the center about the central axis of the cylinder A central portion formed to be inclined upwardly from the end of the head and the end of the cylindrical cap toward the end of the cylindrical cap, and on the outside of the concave portion at the position corresponding to the head, the center portion is formed convexly in a hemispherical shape toward the light emitting direction; It characterized in that it has a comb pattern formed radially convex toward the end of the cylindrical cap from the end of the central portion.

In addition, the surface of the side of the cap is characterized in that it further comprises a plurality of protrusions protruding toward the outside.

In addition, the lighting apparatus according to the present invention is characterized in that the light emitting diode is operated by the current accumulated by the power storage element for a predetermined time, thereby reducing the power consumption by the AC voltage source.

Hereinafter, with reference to the accompanying drawings will be described in more detail the lighting apparatus according to the present invention.

1 is a perspective view showing a lighting apparatus according to the present invention, Figure 2 is a cross-sectional view taken along line AA 'of Figure 1, Figure 3 is a bottom view of the cap according to the present invention.

As shown in Fig. 1 to Fig. 3, the lighting apparatus 1 according to the present invention comprises: a plurality of light emitting light source portions 10; A substrate portion 15 on which the plurality of light emitting portions 10 are mounted, a housing 16 on which the substrate portion 15 is fixed, a base portion 17 on which the housing 16 is fixed, and a light emitting portion It is comprised by the cap 20 which surrounds 10.

Each of the light emitting source portions 10 includes a light emitting chip 11, lead frames 12 and 13 on which the light emitting chips 11 are mounted, the lead frames 12 and 13, and the light emitting chip 11. It is comprised by the bonding wire 14 connected to. The upper portion of the light emitting chip 11 and the lead frames 12 and 13 and the bonding wire 14 are molded by epoxy resin. Each of the lead frames 12, 13 is composed of a pair of legs 12a, 13a for more stable electrical connection.

The pair of lead frames 12 and 13 are formed of a conductive metal, and a light emitting chip 11 is mounted on one side of the lead frame, and the lead frame is for fixing the lead frame legs formed on the substrate 15 to be described later. It is electrically connected to the circuit pattern 15a through a hole (not shown). One end of the bonding wire 14 is connected to the light emitting chip 11, the other end is connected to the substrate, and electrically connected between the two. The bonding wire 14 is connected to the light emitting diode 11 together with the lead frames 12 and 13. Apply.

The plurality of light emitting source portions 10 are mounted to the substrate portion 15. In this embodiment, the substrate portion 15 is formed in a substantially circular shape, and a circuit pattern 15a through which the lead frame is electrically connected is formed on the rear surface thereof, and the hole for fixing the lead frame (not shown). ) And a plurality of substrate part fixing holes 15b into which the fixing projections of the housing to be described later are inserted.

A plurality of light emitting source portions 10 are mounted on the substrate portion 15 at equal intervals on the bottom plate of the substrate portion 15. In the case where only one light emitting light source unit is attached to the substrate, reflection is liable to occur, resulting in reduced light utilization efficiency. In the present embodiment, six light emitting light source units are mounted, but the present invention is not limited thereto, and the number thereof can be adjusted according to the use of the lighting apparatus.

The housing 16 is fixed to the substrate portion 15. On the annular bottom plate of the housing 16, projections 16b protruding outward are formed so that a cap to be described later is mounted, and a plurality of fixing projections 16a inserted into the substrate portion fixing holes 15b are provided. Formed.

The base portion 17 is attached to the housing 16 by soldering or the like. The base portion 17 is equipped with a circuit portion 50 described later.

Meanwhile, a groove 28 is formed in the cap 20 surrounding the plurality of light emitting portions 10, and the protrusions 16 of the housing 16 are fitted into the grooves 28. The cap 20 is formed in a cylindrical shape with one end portion opened.

The inner surface part 27 of the side part 22 of the said cap 20 is not smooth, but is embossed on the surface, such as sandblasting process, for example. In the conventional LED lighting apparatus, since the inner surface of the cap or the case is smoothly processed, for example, light reflected from the front surface of the cap and incident at an angle of 60 ° or more with respect to the normal of the inner surface of the cap side causes total reflection on the surface. There was a problem that the base and the substrate was raised to raise the utilization efficiency of light, but according to the present invention, since the inner surface of the side of the cap 20 is embossed, even if the light is incident at an angle of 60 ° or more Since the total reflection does not occur, the side portion 22 of the cap may be illuminated to increase light utilization efficiency.

The cylindrical cap 20 has a concave portion 21 formed concave with respect to the emission direction of the light in the upper portion of the cap 20. The inner side of the recess 21 is formed with a head 23 formed flat in the center about the central axis of the cap 20, the cylindrical cap 20 from the end of the head 23 The inclined portion 24 is formed to be inclined upwardly toward the end of the. By constructing the head 23 and the inclined portion 24 in the light output direction of the cap 20 as described above, by minimizing the light emitted from the light emitting portion 10 to cause reflection on the inner surface of the cap The utilization efficiency of light can be improved.

In addition, outside the concave portion 21, at the position corresponding to the head portion 23, a hemispherical center portion 25 is formed to be convex toward the outer side in the light emitting direction, so that the cap 20 It serves as a lens so that light transmitted through the inner surface can be diffused. A comb pattern 26 is provided from the end of the center portion 25 toward the end of the cylindrical cap 20. The comb pattern part 26 is formed radially about the center part 25, and is inclined upwards toward the end of the cap 20 from the center part 25. In addition, each comb portion 26a constituting the comb pattern portion 26 is formed to be convex toward the outside, so that the light transmitted through the inner surface of the cap 20 can be better diffused.

In addition, a plurality of protrusions 29 are formed on the outer surface of the side portion 22 of the cap 20 to protrude outward. The projection 29 functions as a kind of lens, for example, so that light transmitted through the inner surface 27 of the side portion of the cap 20 can be better diffused to the outside without being reflected from the outer surface of the side portion. To be able.

On the other hand, the cap 20 may be a transparent material of a synthetic resin material, it is more preferably made of polycarbonate resin.

A circuit configuration formed in the lighting apparatus according to the present invention will be described with reference to FIG. 5.

The circuit of the lighting apparatus according to the present invention includes a first current accumulating part 51, a second current accumulating part 52, a light emitting part 53, a switch part 54, and a bridge rectifying circuit 55. And a power supply unit 56.

The first current accumulator 51 is composed of an inductor L1 and a diode D1. The second current accumulator 52 is composed of an inductor L2 and a diode D2. Light emitting diodes LED1, LED2, LED3, LED4, LED5, and LED6, and the switch unit 54 is composed of a switch Q1, a switch Q2, an inductor L3, a resistor R3, and a resistor R2. 55 is composed of a bridge diode BD1, and the power supply unit 56 is composed of an AC power supply unit AC1, AC2.

First, the AC flowing through the power supply units AC1 and AC2 flows in through the 1,3 terminals at the positive potential and flows out through the 4, 2 terminals. On the contrary, the negative potential flows through the 1 and 4 terminals and flows out through the 3 and 2 terminals (bridge rectifying circuit BD1) (step 1).

Then, since the inflow current is the switch Q2 is off, a constant voltage drop occurs at the base of the switch Q1 to form a base voltage. Accordingly, the switch Q1 conducts and thus the inductor L1 and six light emitting diodes, the inductor L2, It flows out via switch Q1 (step 2).

When the current passing through the switch Q1 accumulates in the inductor L3, and after a certain time (delayed by the accumulation time of the current into the inductor L3), if a constant voltage drop (base voltage of the switch Q2) occurs, the switch Q2 is turned on. Switch Q1 is switched off as both rough currents flow through switch Q2 (step 3).

When the switch Q1 is turned off, the accumulated current of the inductor L3 is discharged through the resistor R3. When the switch Q1 is turned off, a closed circuit composed of an inductor L1, a resistor R1, six light emitting diodes, and a diode D1, a closed circuit composed of an inductor L2, six light emitting diodes, a resistor R1, and a diode D2 is provided. In this case, the current accumulated in the inductors L1 and L2 causes the light emitting diodes to operate.

When all the current accumulated in the inductor L3 is discharged, the switch Q2 is turned off and Q1 is turned on to go through the steps 2 to 4.

The diodes D1 and D2 are for preventing the applied AC current from flowing in the reverse direction of the light emitting diode without flowing to the inductor L1 or L2.

On the other hand, when the switch Q1 is turned on, the capacitor C1 does not discharge the current generated in the inductors L1 and L2, but instead returns to its own potential through the capacitor C1, and the current flows out through the bridge diode BD1 to the outside (AC1, AC2). It has a filter function to prevent outgoing.

According to the present invention, a concave portion formed concave with respect to the light emitting direction is provided on the upper portion of the cap surrounding the light emitting light source, and the reflection of light from the inner surface of the cap is minimized, and the hemispherical center portion and the convex comb pattern on the outer surface of the concave portion. By forming a portion to maximize the diffusion of light, and at the same time embossing the inner surface of the side of the cap by allowing the light reflected from the top of the cap to scatter and transmit without causing total reflection can increase the utilization efficiency of the light.

In addition, the present invention can reduce the power consumption significantly compared to the conventional LED lighting device by emitting the LED using the accumulated current even if the current of the lighting device is turned off using the inductor, capacitor and transistor.

Claims (7)

In a lighting device using a light emitting diode, A plurality of light emission comprising a light emitting chip 11, a lead frame (12, 13) on which the light emitting chip is mounted, and a bonding wire (14) connected to the lead frame (12, 13) and the light emitting chip (11) A light source unit 10; A substrate portion 15 on which the plurality of light emitting portions 10 are mounted; A housing 16 fixed to the substrate 15; A base portion 17 fixed to the housing 16 and to which a circuit is mounted; It comprises a cap 20 surrounding the plurality of light emitting portion 10, The cap 20 is formed in a cylindrical shape, the light emitting diode illumination device, characterized in that the inner surface 27 of the side of the cap 20 is embossed. The method of claim 1, wherein the cylindrical cap 20, the upper portion of the cap 20 has a concave portion formed concave with respect to the emission direction of light, The recess 21, The inclined portion 24 formed inclined upwardly toward the end of the cylindrical cap from the end of the head 23 and the head 23 formed flat in the center about the central axis of the cylinder in the inner side of the concave portion; Is composed, At the position corresponding to the head portion 23 on the outer side of the concave portion, a central portion 25 is formed convexly convex in the light emitting direction, and radially from the end of the center portion 25 toward the end of the cylindrical cap. Light emitting diode illumination device characterized in that it has a convex comb pattern 26 formed. The light emitting diode illuminating device according to claim 1, further comprising a plurality of protrusions (29) formed on the outer surface of the side of the cap (20) to protrude outward. The substrate portion 15 further includes a circuit pattern 15a electrically connected to the light emitting portion 10 on the rear surface of the substrate portion, and a plurality of substrate portion fixing holes 15b. Is composed, The housing (16) is a light emitting diode illumination device characterized in that it further comprises a plurality of fixing projections (16a) inserted into the fixing portion (15b) of the substrate. The method of claim 1, A power supply unit 56 consisting of an AC power supply unit AC1 and AC2; A bridge rectifier circuit 55 composed of a bridge diode BD1 for rectifying the current input from the power supply unit 56; A first current accumulating part (51) consisting of an inductor (L1) and a diode (D1) for receiving current supplied by the bridge rectifying circuit (55) and accumulating current; A second current accumulator 52 composed of an inductor L2 and a diode D2; A light emitting unit including a plurality of light emitting diodes LED1, LED2, LED3, LED4, LED5, and LED6, which receive power from the power supply unit 56 or the current accumulating units 51 and 52 according to the opening and closing operation of the switch unit 54. 53; A light emitting diode illuminating device comprising: a circuit comprising a switch section 54 composed of a switch Q1, a switch Q2, an inductor L3, a resistor R3, and a resistor R2. delete 6. The light emitting diode illuminating device according to claim 5, wherein a condenser C1 is further provided between the switch section and the bridge rectifying circuit.

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