JP2009076794A - Multicolor light emitting diode and illumination cable using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multicolor light emitting diode capable of producing a variety of hues with simple constitution without making the light emitting diode to have the constitution complicated to a user by appearance and an illumination cable using the same, and to provide an illumination cable such that when electric power is fed from an AC electric power supply such as a home outlet to the illumination cable, a feeding direction to the multicolor light emitting diode is never mistaken. <P>SOLUTION: The light emitting diode has an anode-side connection terminal 8a, a cathode-side connection terminal 8b, a cathode-side lead frame 5 mounted with three light emitting chips 2a, 2b and 2c capable of emitting red light, green light and yellow light, and an anode-side lead frame 4 to which the three light emitting chips 2a, 2b and 2c are connected through wire bond lines 6a, 6b and 6c respectively, and the anode-side lead frame 4 is mounted with a control chip 7 controlling power supply to the three light emitting chips. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a multicolor light-emitting diode used for highlighting an article by multicolor light, a roadside tree, an advertisement display tower, a Christmas tree, and the like, and an electric cable using the same.

  Conventionally, light-emitting diodes (LEDs) have been used for illumination cables used as illumination, and various primary colors of light composed of red light-emitting diodes, yellow light-emitting diodes, and blue light-emitting diodes are involved. It is made to produce.

  In recent years, multicolor light emitting diodes on which red light emitting elements, yellow light emitting elements and blue light emitting elements are mounted have appeared. For example, in the LED illumination device disclosed in Patent Document 1, in a substrate on which a plurality of light emitting chips (three of red, yellow, and blue) are mounted, input / output of current in three light emitting diodes is connected to each light emitting diode. It is disclosed that it is controlled by three codes.

  Further, the light-emitting element disclosed in Patent Document 2 discloses that a light-emitting diode is connected in series between two terminals, and various hues are produced depending on the arrangement mode and connection mode of the plurality of light-emitting diodes.

JP 2003-139712 A (Specification 0018, FIG. 5) JP 2006-54336 A (each figure)

  As disclosed in Patent Document 1 above, in order to control the three light emitting diodes, three plus-side wirings and three minus-side wirings are necessary, and the current supplied to each of the light emitting diodes is: There is no choice but to rely on external devices (switches) connected to the positive side wiring. That is, the red switch, the yellow switch, and the blue switch are connected to the outside, and the three light emitting diodes are individually controlled by the switching operation of each switch, and the configuration of the light emitting diodes is complicated. In addition, the circuit configuration for producing various hues is complicated. In particular, when a switch corresponding to each color is connected to the outside, in order to produce an accurate hue, it is troublesome for a person who handles an electric decoration cable to be careful in use in wiring.

  Further, as shown in FIG. 5 of Patent Document 1, each of the three light emitting diodes cannot be controlled by a single plus-side wire and three minus-side wires connected together. That is, since current is supplied to the three light emitting diodes by one plus-side wiring, only the three light emitting diodes are lit at the same time, and a variety of hues cannot be produced.

  In the light emitting element shown in Patent Document 2, since current flows to all the light emitting diodes connected by wire bond lines from the plus side, all the light emitting diodes are lit at the same time. It is impossible to produce a wide variety of hues without changing the connection mode. In particular, in FIG. 19 of Patent Document 2, each light-emitting diode is connected to the anode side through three wire bond lines, but the three light-emitting diodes are turned on simultaneously, resulting in a white color ( The specification [0050] of Patent Document 2) does not produce a wide variety of hues.

  The present invention has been made in view of these points, and its purpose is to produce a wide variety of hues with a simple configuration without complicating the configuration of the light-emitting diode. An object of the present invention is to provide a multicolor light emitting diode capable of satisfying the requirements and an electric decoration cable using the same.

  It is another object of the present invention to provide an electrical cable that does not make a mistake in the direction of power feeding to the multicolor light emitting diode when power is supplied to the electrical cable from AC power such as a household outlet.

  In order to solve the above problems, the present invention provides an anode side connection terminal, a cathode side connection terminal, and a cathode side lead frame on which three light emitting chips capable of emitting red, green and yellow light are mounted. Each of the three light emitting chips has an anode side lead frame connected via a wire bond line, and a control chip for controlling power supply to the three light emitting chips is mounted on the anode side lead frame. It is characterized by.

  In addition, the present invention is characterized in that the first connecting means to which AC power is fed and the second connecting means connected to another electric decoration cable have different shapes.

  More specifically, the present invention provides the following.

  (1) It has two connection terminals of an anode side connection terminal and a cathode side connection terminal, a plurality of light emitting chips are mounted on the cathode side, and each of the plurality of light emitting chips is connected to the anode side via a wire bond line. In the multicolor light emitting diode, a control chip for controlling power feeding to the plurality of light emitting chips is mounted on the anode side.

  According to the present invention, a plurality of light emitting chips are mounted on the cathode side, and a control chip for controlling power supply to the plurality of light emitting chips is mounted on the anode side. Therefore, it is possible to supply power to all of the light sources and power to a part of the plurality of light emitting chips, so that a wide variety of hues can be produced by one light emitting diode.

  In particular, the control chip for controlling power supply to the mounted light emitting chip is not connected to the outside of the light emitting diode, but is connected (mounted) inside the light emitting diode. A variety of hues can be produced with a simple configuration without complicating the configuration of the light emitting diode. Therefore, the user only needs to perform the same connection as that of a general light emitting diode having two connection terminals on the wiring, and is not aware of switching switching to a plurality of light emitting diodes in use. It is possible to easily produce a wide variety of hues.

  (2) The multi-color light emitting diode, wherein the control chip is connected to each of the plurality of light emitting chips by a plurality of wire bond lines corresponding to the plurality of light emitting chips.

  According to the present invention, the number of light emitting chips and the number of wire bond lines are the same for the connection mode between the control chip and the light emitting chip, and each of the plurality of light emitting chips is connected to the control chip via the wire bond lines. Therefore, it is connected by a plurality of wire bond lines corresponding to a plurality of light emitting chips inside the light emitting diode, so that the user can see various colors with a simple configuration without complicating the configuration of the light emitting diode. Can be produced. That is, in order to supply power to a plurality of light emitting chips, a plurality of lines for supplying current corresponding thereto are required, but the plurality of lines for supplying current are not provided outside the light emitting diode, but the light emitting diode. By providing it inside, the user can easily produce various hues with the same connection as a general light emitting diode.

  (3) The plurality of light emitting chips are three light emitting chips capable of emitting red, green and yellow light, and each light emitting chip is connected to the anode side through three wire bond lines. Multicolor light emitting diode characterized by.

  According to the present invention, three light emitting chips that emit light of different colors, red, green, and yellow, are connected to the anode side through three wire bond lines. By controlling the supplied current, it is possible to produce a wide variety of hues based on the three primary colors of light.

  (4) An electric cable in which a plurality of multicolor light emitting diodes are connected.

  According to the present invention, by connecting a plurality of multicolor light emitting diodes capable of emitting multicolor light, the light emitted from the multicolor light emitting diodes can be emphasized, so that the charm as illumination can be further extracted.

  (5) Each of the control chips mounted on a plurality of connected multicolor light emitting diodes controls power feeding to the light emitting chips at different timings.

  According to the present invention, by controlling the power supply to the light-emitting chip at different timings by the individual control chips, a plurality of multicolor light-emitting diodes can produce different hues, thereby further drawing out the appeal as illumination. Can do. In particular, in general, two directly connected multi-color light emitting diodes can control the power supply to the light emitting chip at almost the same timing, so that they can only produce the same hue, but the control chip of the present invention According to the above, even if two multicolor light emitting diodes are directly connected, power supply to different light emitting chips is controlled at different timings, so that two adjacent multicolor light emitting diodes have different hues. It is possible to draw out the charm as illumination.

  (6) A first connection unit having two terminal pins to which AC power is fed, an AC / DC conversion unit that converts AC power into DC power, and a plurality of multicolor light emitting diodes connected in series are connected in parallel. An electrical decoration cable comprising: an electrical decoration means configured to be connected, and configured in the order of the first connection means, the AC / DC conversion means, and the electrical decoration means.

  According to the present invention, the direct current to be fed to the multicolor light emitting diode can be covered by the alternating current direct current conversion means, so that it is possible to feed from the alternating current power supplied from a household outlet, etc. It is possible to easily use the electric cable in such as.

  Moreover, a constant voltage can be applied to a group of multicolor light emitting diodes connected in series by an electric decoration means formed by connecting a plurality of multicolor light emitting diodes connected in series in parallel. Note that the number of multicolor light emitting diodes in the group of multicolor light emitting diodes connected in series can be calculated from the relationship between the forward voltage of the multicolor light emitting diodes and the applied voltage. For example, when the forward voltage is 3.3 V, the applied voltage is calculated. When 100V is for household use, 33 multicolor light emitting diode groups can be connected in series.

  (7) After the said electrical decoration means, it has the 2nd connection means which has a 2 terminal pin connected to another electrical decoration cable, and the said 1st connection means and the said 2nd connection means differ from each other An electric cable characterized by being.

  According to the present invention, the first connection means having the two terminal pins and the second connection means are configured in different shapes from each other. It is possible to prevent erroneous connection such that the second connection means to be connected to the other electric decoration cable is to be supplied with AC power. In particular, if the second connecting means is supplied with AC power, there is a possibility of an accident such as destruction or ignition of the multicolor light emitting diode due to an alternating current flowing through the decoration means to which the multicolor light emitting diode is connected. Thus, erroneous connection can be prevented by the difference in the shape of the connecting means, and an accident can be prevented.

  In addition, it is possible to ensure everything by preventing physical connection errors due to the difference in shape between the first connection means and the second connection means.

  (8) An electrical decoration cable characterized by being connected in series in the order of the first connection means, the AC / DC conversion means, the electrical decoration means, and the second connection means and bundled together.

  According to the present invention, the user can easily use, tidy up, and store the electric cable without being aware of the wiring mode of the multi-color light emitting diode by the electric cable bundled in one. it can.

  That is, since it has the illumination means formed by connecting a plurality of multicolor light emitting diodes connected in series in parallel, normally, when handling the illumination cables connected in parallel, each line is tangled. However, since the present invention is bundled into one even if connected in parallel, it can be handled easily without being conscious of the wiring mode such as series connection or parallel connection. it can.

  The present invention includes an aspect in which “the first connection means, the AC / DC conversion means, and the electrical decoration means are connected in series” and “the first connection means, the AC / DC conversion means, And an aspect of “connected in series in the order of the illumination means and the second connection means”.

  As described above, according to the present invention, a variety of hues can be produced by a single light emitting diode having a simple appearance configuration, and the appeal as illumination can be further extracted. In addition, it can prevent accidents such as destruction and fire of multicolor light emitting diodes due to misconnection, and it can be easily used, cleaned up and stored without being aware of the wiring mode such as series connection and parallel connection. it can.

  1A and 1B are diagrams showing the structure of a multicolor light emitting diode 1 according to an embodiment of the present invention, where FIG. 1A is a schematic cross-sectional view, and FIG. 1B is a schematic plan view.

  The multi-color light emitting diode 1 includes light emitting chips 2a, 2b, 2c, a sealing transparent resin 3, an anode side lead frame 4, a cathode side lead frame 5, wire bond wires 6a, 6b, 6c, and a control chip. 7, an anode side connection terminal 8a, and a cathode side connection terminal 8b.

  Three light emitting chips 2a, 2b, and 2c that emit light of different colors are mounted on the cathode side (for example, red, yellow, and blue).

  The sealing transparent resin 3 has the outer shape of the multicolor light emitting diode 1, and seals the light emitting chips 2a, 2b, 2c, the lead frames 4, 5, the wire bond wires 6a, 6b, 6c, the control chip 7, and the like. It has stopped. The control chip 7 to be sealed is preferably one that generates less heat.

  The anode side lead frame 4 is connected to the anode side connection terminal 8a, and the cathode side lead frame 5 is connected to the cathode side connection terminal 8b. The anode side connection terminal 8a is connected to the + side of the circuit as a power supply side terminal to the multicolor light emitting diode 1, and the cathode side connection terminal 8b is connected to the-side of the circuit as a ground terminal. The anode side lead frame 4 and the anode side connection terminal 8a may be integrally formed, and the cathode side lead frame 5 and the cathode side connection terminal 8b may be integrally formed.

  The control chip 7 is mounted on the anode-side lead frame 4 and controls power feeding to the plurality of light emitting chips 2a, 2b, 2c. The current input from one power supply line connected to the control chip is sent to the wire bond lines 6a, 6b and 6c by the control chip 7 and supplied to the light emitting chips 2a, 2b and 2c. According to FIG. 2B, the light emitting chip 2a connected to the wire bond line 6a, the light emitting chip 2b connected to the wire bond line 6b, the light emitting chip 2c connected to the wire bond line 6c, and so on. The light emitting chip and the plurality of wire bond lines are connected in a one-to-one correspondence, and power can be supplied to each light emitting chip. In general, it is possible to use a semiconductor switch that adjusts the duty ratio of the time for energization through the wire bond lines 6a, 6b, and 6c.

  For example, if the light-emitting chip 2a is red, the light-emitting chip 2b is yellow, and the light-emitting chip 2c is blue, the control chip 7 can switch and turn on the light in any order at any time interval. By applying a current to the light emitting chip so as to be 7 patterns of blue → red yellow → yellow blue → blue red → blue red yellow, seven hues can be produced. In addition, by mounting a control chip in which the light emission timings of these seven patterns are individually different, various light emission patterns can be enjoyed.

  FIG. 2 is a block diagram of the electrical cable 10 according to the embodiment of the present invention. FIG. 3 is a circuit diagram of the electrical cable 10 according to the embodiment of the present invention.

  The electrical decoration cable 10 is comprised from the 1st connection means 11, the alternating current DC conversion means 12, the electrical decoration means 13, and the 2nd connection means 14, and is connected in series in these order.

  The 1st connection means 11 has 2 terminal pins 11a and 11b connected to a household outlet etc., in order to supply direct-current power or alternating current power. Moreover, the 2nd connection means 14 has 2 terminal pin 14a, 14b connected to the other electrical decoration cable which is not shown in figure so that an electrical decoration cable can be extended. In addition, when AC power is supplied, the AC current is supplied between the two terminal pins 11a-11b, but the AC voltage between the two terminal pins 14a-14b is changed to DC by the AC / DC converting means 12, so Since DC power is supplied to the other electric decoration cable (not shown) to be connected, the AC / DC conversion means 12 is not required in the other electric decoration cable.

  The AC / DC converter 12 has an AC / DC converter 12a mainly serving as a function of converting AC power into DC power. As another function, the AC / DC converter 12 has a function of smoothing the DC power converted by the AC / DC converter 12a. Smoothing portion 12b and a current limiting portion 12c as a function for limiting the amount of current flowing to the illumination means 13. Specifically, as shown in FIG. 3, the AC / DC converter 12a is a diode bridge circuit that rectifies full-wave by connecting four variable capacitance diodes, and the smoother 12b has a rectified output that is full-wave rectified. Are connected to each other in parallel to smooth the ripple and approximate a direct current, and the current limiting unit 12c prevents the excessive current from flowing through the multicolor light emitting diode 1 of the illumination means 13. This is a hybrid circuit H that limits the amount of current.

  The decorating means 13 has a plurality of multicolor light emitting diodes 1, and three multicolor light emitting diode groups composed of a plurality of multicolor light emitting diodes D1 to D33 connected in series are connected in parallel. The number of multicolor light emitting diode groups is not limited to this, and since they are connected in parallel, the same voltage (for example, 100 V) can be applied regardless of the number. Also, by making the number of multicolor light emitting diodes connected in series to the multicolor light emitting diode group the same load for each multicolor light emitting diode group, the same amount of current can be applied to each.

  FIG. 4 is a schematic external view of the electrical cable 10 according to the embodiment of the present invention. In appearance, a plurality of multicolor light emitting diodes are bundled into one so as to be connected in series.

  FIG. 5 is a view showing the first connection means 11 and the second connection means 14 of the electrical decoration cable 10 according to the embodiment of the present invention. For example, FIG. 5A shows the first connection means 11 and FIG. This is the second connection means 14.

  The first connecting means 11 is a cylindrical connector, and is formed so as to cut out the peripheral surface of the cylinder, thereby forming a gap 11c. The connector member protrudes more centrally than the gap 11c, and female two terminal pins 11a and 11b are embedded in the through holes formed in the connector member. That is, the first connecting means 11 is a female pin.

  The second connecting means 14 is a cylindrical connector, and is formed so as to be hollowed out to form a gap 14c. Male two terminal pins 14a and 14b protrude into the gap 14c. That is, the second connecting means 14 is a male pin.

  As described above, the first connecting means 11 and the second connecting means 14 have different shapes so that the first connecting means 11 and the second connecting means 14 cannot be physically connected. Prevent connection. For example, the AC power supply connector connected to the first connection means 11 is formed in the shape of FIG. 5B (second connection means), so that the AC power supply connector is as shown in FIG. Although it is connectable with the 1st connection means 11, since it cannot connect with the 2nd connection means of FIG.5 (b) of the same shape, it will apply an alternating current power directly to the decoration means 13 Prevents misconnections.

  The multicolor light emitting diode and the electric cable according to the present invention can produce a wide variety of hues with a simple configuration, sufficiently draw out the attractiveness as illumination, and make a mistake in the feeding direction to the multicolor light emitting diode. Useful as no.

The figure which shows the structure of the multicolor light emitting diode which concerns on embodiment of this invention. The block diagram of the electrical decoration cable which concerns on embodiment of this invention. The circuit diagram of the electrical decoration cable which concerns on embodiment of this invention. The external appearance schematic diagram of the electrical decoration cable which concerns on embodiment of this invention. The figure which shows the 1st connection means and the 2nd connection means of the electrical decoration cable which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Multicolor light emitting diode 2a, 2b, 2c Light emitting chip 3 Transparent resin for sealing 4 Anode side lead frame 5 Cathode side lead frame 6a, 6b, 6c Wire bond line 7 Control chip 8a Anode side connecting terminal 8b Cathode side connecting terminal 10 Electrical decoration cable 11 1st connection means 11a, 11b 2 terminal pin 11c Air gap 12 AC / DC conversion means 12a AC / DC conversion part 12b Smoothing part 12c Current limiting part 13 Electric decoration means 14 Second connection means 14a, 14b 2 terminal pin 14c Air gap

Claims (8)

There are two connection terminals of an anode side connection terminal and a cathode side connection terminal, a plurality of light emitting chips are mounted on the cathode side, and each of the plurality of light emitting chips is connected to the anode side via a wire bond line. In color light emitting diode,
A multi-color light emitting diode, wherein a control chip for controlling power feeding to the plurality of light emitting chips is mounted on the anode side.   2. The multicolor light emitting diode according to claim 1, wherein the control chip is connected to each of the plurality of light emitting chips by a plurality of wire bond lines corresponding to the plurality of light emitting chips.   The plurality of light emitting chips are three light emitting chips capable of emitting red, green, and yellow, and each light emitting chip is connected to an anode side through three wire bond lines. The multicolor light emitting diode according to claim 1 or 2.   The electrical decoration cable which connected two or more the multicolor light emitting diodes in any one of Claim 1 to 3.   The electric decoration cable according to claim 4, wherein each control chip mounted on a plurality of connected multi-color light emitting diodes controls power feeding to the light emitting chip at different timings. First connection means having two terminal pins to which AC power is fed;
AC / DC conversion means for converting AC power to DC power;
A plurality of multi-color light emitting diodes connected in series, an electrical decoration means formed by connecting in parallel,
Have
6. The electric decoration cable according to claim 4, wherein the electric decoration cable is configured in the order of the first connection means, the AC / DC conversion means, and the electric decoration means. After the electrical decoration means, having a second connection means having two terminal pins connected to another electrical decoration cable,
The electric decoration cable according to claim 6, wherein the first connection means and the second connection means have different shapes.   8. The first connection means, the AC / DC conversion means, the electrical decoration means, and, if desired, the second connection means are connected in series and are bundled into one. The electrical cable described.

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