JP2000231363A - Led set lamp circuit and multicolor led set lamp - Google Patents

Led set lamp circuit and multicolor led set lamp

Info

Publication number
JP2000231363A
JP2000231363A JP11031555A JP3155599A JP2000231363A JP 2000231363 A JP2000231363 A JP 2000231363A JP 11031555 A JP11031555 A JP 11031555A JP 3155599 A JP3155599 A JP 3155599A JP 2000231363 A JP2000231363 A JP 2000231363A
Authority
JP
Japan
Prior art keywords
leds
led
series
circuit
zener
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11031555A
Other languages
Japanese (ja)
Inventor
Masatoshi Oishi
昌利 大石
Toyotaro Tokimoto
豊太郎 時本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Avix Inc
Original Assignee
Avix Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Avix Inc filed Critical Avix Inc
Priority to JP11031555A priority Critical patent/JP2000231363A/en
Publication of JP2000231363A publication Critical patent/JP2000231363A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To maintain other LEDs to be light emittable even when one LED is disconnected in the LED set lamp circuit of a serial connection type and also to protect LEDs from static electricity. SOLUTION: Each forward drop voltage of red LDEs 11 to 16 is 2.2 volts. A zener diode for bias 2 whose zener voltage is 2.4 volts is connected in parallel with each LED of the red LEDs 11 to 16 in a reverse polarity. Each forward drop voltage of green LEDs 21 to 23 and blue LEDs 31 to 33 is 3.5 volts. A zener diode for bias 3 whose zener voltage is 3.9 volts is connected in parallel with each LED of the green LEDs 21 to 23 and the blue LEDs 31 to 33 in a reverse polarity. Moreover, zener diodes for absorbing surge 4a, 4b, 4c are connected to each other among a common terminal 1 and a red signal terminal 10, a green signal terminal 20 and a blue signal terminal 30 in a polarity reverse to those of the LEDs. Since each zener voltage of the diodes 4a to 4c is 20 volts, the diodes 4a to 4c are not be brought into conduction at the normal driving voltage of respective LED serial circuits.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は、照明器具やディ
スプレイの画素部品として応用されるＬＥＤ集合ランプ
回路およびマルチカラーＬＥＤ集合ランプに関し、とく
に、ＬＥＤの断線故障に対処する技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED collective lamp circuit and a multi-color LED collective lamp applied as a pixel component of a lighting fixture or a display, and more particularly to a technique for coping with a disconnection failure of an LED.

【０００２】[0002]

【従来の技術】高輝度ＬＥＤ（発光ダイオード）の小型
・長寿命・低消費電力といった特徴を利用して、多数の
ＬＥＤを集積実装するさまざまな照明器具やディスプレ
イが開発されている。高密度に配置した多数のＬＥＤを
一斉に駆動して局所的に高輝度発光させるには、適宜数
のＬＥＤを直列接続して駆動電源に接続する回路方式が
便利である。多数のＬＥＤを並列接続して電源を印加す
る回路方式の場合、各ＬＥＤに流れる電流をバランスさ
せることが難しく、電流制限や調整のための付加回路が
複雑になる。直列の回路方式ではそのよう面倒がない。
また並列回路方式では、各ＬＥＤを定電圧・大電流で駆
動することになり、ＬＥＤ発光特性上の低効率の領域で
動作となる。直列の回路方式の方が高効率である。2. Description of the Related Art Various lighting fixtures and displays in which a large number of LEDs are integrated and mounted have been developed by utilizing the features of high brightness LEDs (light emitting diodes) such as small size, long life, and low power consumption. In order to simultaneously drive a large number of LEDs arranged at a high density to locally emit high-brightness light, a circuit system in which an appropriate number of LEDs are connected in series and connected to a driving power supply is convenient. In the case of a circuit system in which a large number of LEDs are connected in parallel to apply power, it is difficult to balance the current flowing through each LED, and an additional circuit for limiting and adjusting the current becomes complicated. The serial circuit method does not have such a trouble.
Further, in the parallel circuit system, each LED is driven at a constant voltage and a large current, and operates in a low-efficiency region in terms of LED light emission characteristics. The series circuit method is more efficient.

【０００３】[0003]

【発明が解決しようとする課題】しかし直列の回路方式
には、つぎのような決定的な欠点がある。直列接続され
ている多数のＬＥＤの中で、なんらかの原因で１個でも
断線故障すると、そのＬＥＤ直列回路の全体に電流が流
れなくなり、すべてのＬＥＤが発光しなくなる。照明器
具やディスプレイの画素部品としてのＬＥＤ集合ランプ
を考える。たとえば６個のＬＥＤをまとめた集合ランプ
だとすると、その中の１個のＬＥＤが断線しても、残り
の５個のＬＥＤが正常に発光しているのであれば、それ
ほど大きく機能が損われるわけではない。ところが６個
全部を直列にした回路では、１個でも断線すれば全部の
ＬＥＤが発光しなくなる。However, the serial circuit system has the following decisive disadvantages. If any one of a large number of LEDs connected in series breaks for some reason, current stops flowing through the entire LED series circuit, and all LEDs stop emitting light. Consider an LED collective lamp as a pixel component of a lighting fixture or a display. For example, if it is a collective lamp in which six LEDs are put together, even if one of them breaks, if the remaining five LEDs emit light normally, the function is not so greatly impaired. Absent. However, in a circuit in which all six LEDs are connected in series, all the LEDs do not emit light if one of the LEDs is disconnected.

【０００４】そこで従来は、たとえば３個のＬＥＤの直
列回路を２組並列に接続するような直並列の混合回路を
採用していることが多い。この例であれば、１個のＬＥ
Ｄが断線すると、それを含む直列の３個のＬＥＤが発光
しなくなるが、残る３個は発光可能である。しかし断線
による機能低下は大きいし、並列回路の電流バランスを
とるための複雑な付加回路も必要である。Conventionally, therefore, a series-parallel mixed circuit in which two sets of, for example, three LED series circuits are connected in parallel is often used. In this example, one LE
When D is disconnected, three LEDs in series including the LED do not emit light, but the remaining three LEDs can emit light. However, the functional deterioration due to the disconnection is large, and a complicated additional circuit for balancing the current of the parallel circuit is required.

【０００５】なお、ＬＥＤの断線故障は静電気ストレス
によって引き起こされやすいことが知られている。その
ため、ＬＥＤ利用機器の製作過程では、個々のＬＥＤラ
ンプのリードフレームに静電気が印加されないようにさ
まざまな対策を講じている。ところが印刷配線板に多数
のＬＥＤを実装した段階でも、印刷配線板の配線パター
ンを通じてＬＥＤに静電気が印加されることがある。そ
れにも関わらず従来は対策されていなかった。It is known that disconnection failure of an LED is easily caused by electrostatic stress. Therefore, in the process of manufacturing the LED-based equipment, various measures are taken to prevent static electricity from being applied to the lead frame of each LED lamp. However, even when many LEDs are mounted on the printed wiring board, static electricity may be applied to the LEDs through the wiring pattern of the printed wiring board. Nevertheless, no measures have been taken in the past.

【０００６】この発明は前述した従来の問題点に鑑みな
されたもので、その目的は、直列接続タイプのＬＥＤ集
合ランプ回路において１個が断線しても他のＬＥＤを発
光可能に維持できるよううにし、また静電気からＬＥＤ
を保護することにある。また、そのようなＬＥＤ集合ラ
ンプ回路を採用したマルチカラーＬＥＤ集合ランプを提
供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to maintain the other LEDs capable of emitting light even if one of them is disconnected in a series connection type LED collective lamp circuit. LED from static electricity
Is to protect. Another object of the present invention is to provide a multi-color LED collective lamp employing such an LED collective lamp circuit.

【０００７】[0007]

【課題を解決するための手段】＝＝＝請求項１の発明＝
＝＝ （１）複数個のＬＥＤが直列接続されていて、このＬＥ
Ｄ直列回路が共通の駆動回路に接続されるＬＥＤ集合ラ
ンプ回路である。 （２）１個または複数個直列のツェナーダイオードが前
記各ＬＥＤにそれぞれ逆極性で並列接続されている。 （３）１つの前記ＬＥＤに並列なツェナーダイオード回
路のツェナー電圧が当該ＬＥＤの順方向降下電圧よりも
少し高い。Means for Solving the Problems === Invention of Claim 1 =
== (1) A plurality of LEDs are connected in series.
The D series circuit is an LED collective lamp circuit connected to a common drive circuit. (2) One or a plurality of series Zener diodes are connected in parallel to the LEDs with opposite polarities. (3) The Zener voltage of the Zener diode circuit parallel to one LED is slightly higher than the forward drop voltage of the LED.

【０００８】＝＝＝請求項２の発明＝＝＝ 複数個のＬＥＤが直列接続されていて、このＬＥＤ直列
回路が共通の駆動回路に接続されるＬＥＤ集合ランプ回
路であって、このＬＥＤ直列回路の両端に１個または複
数個直列のツェナーダイオードがＬＥＤと逆極性で接続
され、前記ＬＥＤ直列回路の正常な駆動電圧では前記ツ
ェナーダイオードが導通しないように構成されているこ
とを特徴とするＬＥＤ集合ランプ回路である。=== Invention of Claim 2 === An LED collective lamp circuit in which a plurality of LEDs are connected in series, and the LED series circuit is connected to a common drive circuit. One or more series-connected Zener diodes are connected to both ends of the LED in a reverse polarity to the LED, and the Zener diode is configured not to conduct at a normal driving voltage of the LED series circuit. It is a lamp circuit.

【０００９】＝＝＝請求項３の発明＝＝＝ （１）発光色の異なる３種類のＬＥＤが共通の印刷配線
板にそれぞれ複数個混在して実装されたマルチカラーＬ
ＥＤ集合ランプである。 （２）前記印刷配線板において、第１発光色の複数個の
ＬＥＤが直列接続され、第２発光色の複数個のＬＥＤが
直列接続され、第３発光色の複数個のＬＥＤが直列接続
されており、第１発光色ＬＥＤ直列回路と第２発光色Ｌ
ＥＤ直列回路と第３発光色ＬＥＤ直列回路のそれぞれの
一端がコモン端子に共通接続されている。 （３）前記印刷配線板において、１個または複数個直列
のツェナーダイオードが前記各ＬＥＤにそれぞれ逆極性
で並列接続されており、各ＬＥＤの順方向降下電圧より
もこれに並列なツェナーダイオード回路のツェナー電圧
の方が少し高い。 （４）前記印刷配線板において、第１発光色ＬＥＤ直列
回路・第２発光色ＬＥＤ直列回路・第３発光色ＬＥＤ直
列回路のそれぞれの他方の端子と前記コモン端子との間
にそれぞれ、１個または複数個直列のツェナーダイオー
ドがＬＥＤと逆極性で接続されており、各ＬＥＤ直列回
路の正常な駆動電圧ではこれらツェナーダイオード回路
は導通しない。=== Invention of Claim 3 === (1) A multi-color LED in which a plurality of three types of LEDs having different emission colors are mounted on a common printed wiring board, respectively.
It is an ED collective lamp. (2) In the printed wiring board, a plurality of LEDs of a first emission color are connected in series, a plurality of LEDs of a second emission color are connected in series, and a plurality of LEDs of a third emission color are connected in series. The first emission color LED series circuit and the second emission color L
One end of each of the ED series circuit and the third emission color LED series circuit is commonly connected to a common terminal. (3) In the printed wiring board, one or a plurality of zener diodes in series are connected in parallel to the LEDs with opposite polarities, respectively. Zener voltage is slightly higher. (4) In the printed wiring board, one each between the other terminal of each of the first luminescent color LED series circuit, the second luminescent color LED series circuit, and the third luminescent color LED series circuit and the common terminal. Alternatively, a plurality of series-connected zener diodes are connected in reverse polarity to the LEDs, and these zener diode circuits do not conduct at a normal drive voltage of each LED series circuit.

【００１０】[0010]

【発明の実施の形態】この発明の一実施例によるマルチ
カラーＬＥＤ集合ランプの構成を図１〜図に示してい
る。この実施例の集合ランプはディスプレイの画素部品
として設計したものであり、６個の赤色ＬＥＤ１１〜１
６と３個の緑色ＬＥＤ２１〜２３と３個の青色ＬＥＤ３
１〜３３とを混在して高密度実装したランプであり、こ
れがディスプレイ画面の１ドット分の画素となる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a multi-color LED collective lamp according to an embodiment of the present invention is shown in FIGS. The collective lamp of this embodiment is designed as a pixel component of a display, and includes six red LEDs 11 to 1.
6 and 3 green LEDs 21 to 23 and 3 blue LEDs 3
This is a lamp that is densely mounted with a mixture of 1 to 33, and is a pixel for one dot on the display screen.

【００１１】図１はマルチカラーＬＥＤ集合ランプの電
気結線図である。６個の赤色ＬＥＤ１１〜１６はコモン
端子１と赤信号端子１０の間に直列接続されている。３
個の緑色ＬＥＤ２１〜２３はコモン端子１と緑信号端子
２０の間に直列接続されている。３個の青色ＬＥＤ３１
〜３３はコモン端子１と青信号端子３０の間に直列接続
されている。コモン端子１は各ＬＥＤ直列回路のアノー
ド側と接続されている。図示していないが、コモン端子
１はディスプレイ装置の駆動電源の正極に接続され、赤
信号端子１０・緑信号端子２０・青信号端子３０はディ
スプレイ装置における駆動回路の同一ドットのＲＧＢ出
力にそれぞれ接続される。FIG. 1 is an electrical connection diagram of a multicolor LED collective lamp. The six red LEDs 11 to 16 are connected in series between the common terminal 1 and the red signal terminal 10. 3
The green LEDs 21 to 23 are connected in series between the common terminal 1 and the green signal terminal 20. Three blue LEDs 31
33 are connected in series between the common terminal 1 and the green signal terminal 30. The common terminal 1 is connected to the anode side of each LED series circuit. Although not shown, the common terminal 1 is connected to the positive electrode of the driving power supply of the display device, and the red signal terminal 10, the green signal terminal 20, and the blue signal terminal 30 are connected to the RGB output of the same dot of the driving circuit in the display device, respectively. You.

【００１２】赤色ＬＥＤ１１〜１６の個々の順方向降下
電圧は２．２ボルトである。この赤色ＬＥＤ１１〜１６
の１つひとつに、ツェナー電圧が２．４ボルトのバイパ
ス用ツェナーダイオード２が逆極性で並列接続されてい
る。緑色ＬＥＤ２１〜２３および青色ＬＥＤ３１〜３３
の個々の順方向降下電圧は３．５ボルトである。これら
緑色ＬＥＤ２１〜２３および青色ＬＥＤ３１〜３３の１
つひとつに、ツェナー電圧が３．９ボルトのバイパス用
ツェナーダイオード３が逆極性で並列接続されている。The forward voltage drop of each of the red LEDs 11 to 16 is 2.2 volts. This red LED 11-16
Each of them is connected in parallel with a zener diode 2 for bypass having a zener voltage of 2.4 volts with opposite polarity. Green LEDs 21 to 23 and blue LEDs 31 to 33
Is 3.5 volts. One of these green LEDs 21 to 23 and blue LEDs 31 to 33
In each case, a bypass zener diode 3 having a zener voltage of 3.9 volts is connected in parallel with reverse polarity.

【００１３】また、コモン端子１と赤信号端子１０の間
と、コモン端子１と緑信号端子２０の間と、コモン端子
１と青信号端子３０の間にそれぞれ、サージ吸収用ツェ
ナーダイオード４ａ・４ｂ・４ｃがＬＥＤと逆極性で接
続されている。このサージ吸収用ツェナーダイオード４
ａ〜４ｃのツェナー電圧は２０ボルトであり、各ＬＥＤ
直列回路の正常な駆動電圧ではツェナーダイオード４ａ
〜４ｃは導通しない。Further, surge absorbing Zener diodes 4a, 4b. 4c is connected to the LED with the opposite polarity. This surge absorbing Zener diode 4
The Zener voltage of a to 4c is 20 volts, and each LED
At the normal driving voltage of the series circuit, the Zener diode 4a
4c do not conduct.

【００１４】図１に示したマルチカラーＬＥＤ集合ラン
プの実装構造を図２、図３、図４に示している。図２と
図３はこの集合ランプの印刷配線板５の配線パターンを
中心に表現している。印刷配線板５は両面基板であり、
図２は表側、図３は裏側であり、表裏の配線パターンの
要所がスルーホールで接続されている。図４は合計１２
個の前記ＬＥＤの実装レイアウトを示している。このよ
うに１２個のＬＥＤを各色混在させて印刷配線板５の表
側に実装し、１２個のバイパス用ツェナーダイオード２
と３、および３個のサージ吸収用ツェナーダイオード４
ａ〜４ｃを印刷配線板５の裏側に実装することで、回路
的には図１に示した接続状態になる。FIGS. 2, 3 and 4 show the mounting structure of the multi-color LED collective lamp shown in FIG. 2 and 3 mainly show the wiring pattern of the printed wiring board 5 of the collective lamp. The printed wiring board 5 is a double-sided board,
FIG. 2 shows the front side, and FIG. 3 shows the back side. Important portions of the wiring patterns on the front and back are connected by through holes. FIG. 4 shows a total of 12
2 shows a mounting layout of the LEDs. As described above, 12 LEDs are mixed on each surface and mounted on the front side of the printed wiring board 5, and 12 Zener diodes 2 for bypass are mounted.
And 3, and three surge absorbing Zener diodes 4
By mounting a to 4c on the back side of the printed wiring board 5, the connection state shown in FIG.

【００１５】[0015]

【発明の効果】この発明のよれば、直列接続された複数
個のＬＥＤの中のある１個が断線故障しても、そのＬＥ
Ｄと並列のツェナーダイオードが導通して残りのＬＥＤ
に駆動電流が流れるので、残りのＬＥＤは発光可能であ
り、ＬＥＤ集合ランプとしての機能を継続できる。つま
り、ＬＥＤの断線故障が起きても被害を最小限にくいと
めることができる。またこの発明のよれば、ＬＥＤ直列
回路の端子部分に外部から大きな静電気が作用した場合
に、ＬＥＤ直列回路に並列接続されたツェナーダイオー
ド回路にサージ電流が流れるので、有害なサージがＬＥ
Ｄに印加されるのを防ぐことができる。According to the present invention, even if one of a plurality of LEDs connected in series has a disconnection failure, the LE of the LED can be reduced.
Zener diode in parallel with D conducts and the remaining LEDs
, The remaining LED can emit light, and the function as an LED collective lamp can be continued. That is, even if an LED disconnection failure occurs, damage can be minimized. According to the present invention, when a large amount of static electricity acts on the terminal portion of the LED series circuit from the outside, a surge current flows through the Zener diode circuit connected in parallel to the LED series circuit.
D can be prevented from being applied.

【図面の簡単な説明】[Brief description of the drawings]

【図１】この発明の一実施例によるマルチカラーＬＥＤ
集合ランプの電気結線図である。FIG. 1 shows a multi-color LED according to an embodiment of the present invention.
It is an electrical connection diagram of a collective lamp.

【図２】同上実施例の集合ランプの印刷配線板の表側の
構成図である。FIG. 2 is a configuration diagram of a front side of a printed wiring board of the collective lamp of the embodiment.

【図３】同上印刷配線板の裏側の構成である。FIG. 3 is a configuration of the back side of the printed wiring board.

【図４】同上印刷配線板の表側におけるＬＥＤの実装レ
イアウト図である。FIG. 4 is a layout view of mounting LEDs on the front side of the printed wiring board;

【符号の説明】[Explanation of symbols]

１ コモン端子 ２ バイパス用ツェナーダイオード ３ バイパス用ツェナーダイオード ４ａ〜４ｃ サージ吸収用ツェナーダイオード ５ 印刷配線板 １０ 赤信号端子 １１〜１６ 赤色ＬＥＤ ２０ 緑信号端子 ２１〜２３ 緑色ＬＥＤ ３０ 青信号端子 ３１〜３２ 青色ＬＥＤ ５ 印刷配線板 DESCRIPTION OF SYMBOLS 1 Common terminal 2 Zener diode for bypass 3 Zener diode for bypass 4a-4c Zener diode for surge absorption 5 Printed wiring board 10 Red signal terminal 11-16 Red LED 20 Green signal terminal 21-23 Green LED 30 Blue signal terminal 31-32 Blue LED 5 Printed wiring board

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 つぎの事項（１）（２）（３）により特
定される発明。 （１）複数個のＬＥＤが直列接続されていて、このＬＥ
Ｄ直列回路が共通の駆動回路に接続されるＬＥＤ集合ラ
ンプ回路である。 （２）１個または複数個直列のツェナーダイオードが前
記各ＬＥＤにそれぞれ逆極性で並列接続されている。 （３）１つの前記ＬＥＤに並列なツェナーダイオード回
路のツェナー電圧が当該ＬＥＤの順方向降下電圧よりも
少し高い。1. The invention specified by the following items (1), (2) and (3). (1) A plurality of LEDs are connected in series.
The D series circuit is an LED collective lamp circuit connected to a common drive circuit. (2) One or a plurality of series Zener diodes are connected in parallel to the LEDs with opposite polarities. (3) The Zener voltage of the Zener diode circuit parallel to one LED is slightly higher than the forward drop voltage of the LED. 【請求項２】 複数個のＬＥＤが直列接続されていて、
このＬＥＤ直列回路が共通の駆動回路に接続されるＬＥ
Ｄ集合ランプ回路であって、このＬＥＤ直列回路の両端
に１個または複数個直列のツェナーダイオードがＬＥＤ
と逆極性で接続され、前記ＬＥＤ直列回路の正常な駆動
電圧では前記ツェナーダイオードが導通しないように構
成されていることを特徴とするＬＥＤ集合ランプ回路。2. A plurality of LEDs are connected in series,
This LED series circuit is connected to a common drive circuit by LE
A D-collection lamp circuit, wherein one or a plurality of series Zener diodes are provided at both ends of the LED series circuit.
An LED collective lamp circuit, which is connected in reverse polarity to the LED and is configured so that the zener diode does not conduct at a normal driving voltage of the LED series circuit. 【請求項３】 つぎの事項（１）〜（４）により特定さ
れる発明。 （１）発光色の異なる３種類のＬＥＤが共通の印刷配線
板にそれぞれ複数個混在して実装されたマルチカラーＬ
ＥＤ集合ランプである。 （２）前記印刷配線板において、第１発光色の複数個の
ＬＥＤが直列接続され、第２発光色の複数個のＬＥＤが
直列接続され、第３発光色の複数個のＬＥＤが直列接続
されており、第１発光色ＬＥＤ直列回路と第２発光色Ｌ
ＥＤ直列回路と第３発光色ＬＥＤ直列回路のそれぞれの
一端がコモン端子に共通接続されている。 （３）前記印刷配線板において、１個または複数個直列
のツェナーダイオードが前記各ＬＥＤにそれぞれ逆極性
で並列接続されており、各ＬＥＤの順方向降下電圧より
もこれに並列なツェナーダイオード回路のツェナー電圧
の方が少し高い。 （４）前記印刷配線板において、第１発光色ＬＥＤ直列
回路・第２発光色ＬＥＤ直列回路・第３発光色ＬＥＤ直
列回路のそれぞれの他方の端子と前記コモン端子との間
にそれぞれ、１個または複数個直列のツェナーダイオー
ドがＬＥＤと逆極性で接続されており、各ＬＥＤ直列回
路の正常な駆動電圧ではこれらツェナーダイオード回路
は導通しない。3. The invention specified by the following items (1) to (4). (1) A multi-color LED in which a plurality of three types of LEDs having different emission colors are mixedly mounted on a common printed wiring board.
It is an ED collective lamp. (2) In the printed wiring board, a plurality of LEDs of a first emission color are connected in series, a plurality of LEDs of a second emission color are connected in series, and a plurality of LEDs of a third emission color are connected in series. The first emission color LED series circuit and the second emission color L
One end of each of the ED series circuit and the third emission color LED series circuit is commonly connected to a common terminal. (3) In the printed wiring board, one or a plurality of zener diodes in series are connected in parallel to the LEDs with opposite polarities, respectively. Zener voltage is slightly higher. (4) In the printed wiring board, one each between the other terminal of each of the first luminescent color LED series circuit, the second luminescent color LED series circuit, and the third luminescent color LED series circuit and the common terminal. Alternatively, a plurality of series-connected zener diodes are connected in reverse polarity to the LEDs, and these zener diode circuits do not conduct at a normal drive voltage of each LED series circuit.
JP11031555A 1999-02-09 1999-02-09 Led set lamp circuit and multicolor led set lamp Pending JP2000231363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11031555A JP2000231363A (en) 1999-02-09 1999-02-09 Led set lamp circuit and multicolor led set lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11031555A JP2000231363A (en) 1999-02-09 1999-02-09 Led set lamp circuit and multicolor led set lamp

Publications (1)

Publication Number Publication Date
JP2000231363A true JP2000231363A (en) 2000-08-22

Family

ID=12334442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11031555A Pending JP2000231363A (en) 1999-02-09 1999-02-09 Led set lamp circuit and multicolor led set lamp

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Country Link
JP (1) JP2000231363A (en)

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US6472688B2 (en) * 2000-03-02 2002-10-29 Sharp Kabushiki Kaisha Semiconductor light emitting device and display device using the same
KR100807422B1 (en) 2005-04-22 2008-02-25 산요덴키가부시키가이샤 Light-emitting element drive controlling device and light-emitting element driving device
JP2008046459A (en) * 2006-08-18 2008-02-28 Mitsubishi Electric Corp Liquid crystal display and refrigerator
CN100442335C (en) * 2006-04-20 2008-12-10 启耀光电股份有限公司 Light-emitting device
WO2010063023A3 (en) * 2008-11-30 2010-09-16 Cree, Inc. Electronic device including circuitry comprising open failure-susceptible components, and open failure-actuated anti-fuse pathway
CN102307412A (en) * 2011-03-09 2012-01-04 友达光电股份有限公司 Light emitting device with high operation reliability and light source system using the same
US8436371B2 (en) 2007-05-24 2013-05-07 Cree, Inc. Microscale optoelectronic device packages
WO2014049154A3 (en) * 2012-09-27 2014-05-30 Osram Opto Semiconductors Gmbh Optoelectronic component with protective circuit
JP2014225511A (en) * 2013-05-15 2014-12-04 ローム株式会社 Led module and method for manufacturing led module
US9781803B2 (en) 2008-11-30 2017-10-03 Cree, Inc. LED thermal management system and method
CN108320698A (en) * 2018-03-21 2018-07-24 佛山市青松科技股份有限公司 A kind of LED drivings display circuit

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6472688B2 (en) * 2000-03-02 2002-10-29 Sharp Kabushiki Kaisha Semiconductor light emitting device and display device using the same
KR100807422B1 (en) 2005-04-22 2008-02-25 산요덴키가부시키가이샤 Light-emitting element drive controlling device and light-emitting element driving device
CN100442335C (en) * 2006-04-20 2008-12-10 启耀光电股份有限公司 Light-emitting device
JP2008046459A (en) * 2006-08-18 2008-02-28 Mitsubishi Electric Corp Liquid crystal display and refrigerator
US8436371B2 (en) 2007-05-24 2013-05-07 Cree, Inc. Microscale optoelectronic device packages
WO2010063023A3 (en) * 2008-11-30 2010-09-16 Cree, Inc. Electronic device including circuitry comprising open failure-susceptible components, and open failure-actuated anti-fuse pathway
US8643283B2 (en) 2008-11-30 2014-02-04 Cree, Inc. Electronic device including circuitry comprising open failure-susceptible components, and open failure-actuated anti-fuse pathway
US9781803B2 (en) 2008-11-30 2017-10-03 Cree, Inc. LED thermal management system and method
CN102307412A (en) * 2011-03-09 2012-01-04 友达光电股份有限公司 Light emitting device with high operation reliability and light source system using the same
WO2014049154A3 (en) * 2012-09-27 2014-05-30 Osram Opto Semiconductors Gmbh Optoelectronic component with protective circuit
US10426006B2 (en) 2012-09-27 2019-09-24 Osram Opto Semiconductors Gmbh Optoelectronic component with protective circuit
JP2014225511A (en) * 2013-05-15 2014-12-04 ローム株式会社 Led module and method for manufacturing led module
US9865585B2 (en) 2013-05-15 2018-01-09 Rohm Co., Ltd. LED module and method of manufacturing the same
US10074645B2 (en) 2013-05-15 2018-09-11 Rohm Co., Ltd. LED module and method of manufacturing the same
CN108320698A (en) * 2018-03-21 2018-07-24 佛山市青松科技股份有限公司 A kind of LED drivings display circuit

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