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 JP3155599A JP3155599A JP2000231363A JP 2000231363 A JP2000231363 A JP 2000231363A JP 3155599 A JP3155599 A JP 3155599A JP 3155599 A JP3155599 A JP 3155599A JP 2000231363 A JP2000231363 A JP 2000231363A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
led
series
circuit
connected
plurality
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
JP3155599A
Other languages
Japanese (ja)
Inventor
Masatoshi Oishi
Toyotaro Tokimoto
昌利 大石
豊太郎 時本
Original Assignee
Avix Inc
アビックス株式会社
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

Links

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。 TECHNICAL FIELD The present invention relates to a LED aggregate lamp circuits and multi-color LED aggregate lamp is applied as the pixel part of the luminaire and a display, in particular, to a technique for dealing with disconnection failure the 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。 Utilizing features such compact, long life, low power consumption of the Prior Art High brightness LED (light emitting diode), a variety of lighting fixtures and display, which integrated multiple LED has been developed. 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。 To simultaneously driven locally high luminance multiple LED arranged at high density, circuit system to be connected to a driving power source an appropriate number of LED connected in series is convenient. 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。 For many circuit system the LED connected in parallel to apply the power, it is difficult to balance the current flowing through each LED, additional circuits for current limiting and adjustment become complicated. 直列の回路方式ではそのよう面倒がない。 Such there is no trouble in the series of circuit system.
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。 In the parallel circuit system, it will be driving each LED with a constant voltage and large current and operate in a region of low efficiency on the LED emission characteristics. 直列の回路方式の方が高効率である。 If the series of circuit system is a high efficiency.

【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。 The however series circuit system [0006], there is a decisive disadvantage as follows. 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。 Among the many LED connected in series, when disconnection failure even one for some reason, no current flows through the entirety of the LED series circuit, all the LED will not emit light. 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。 Consider the LED aggregate lamp as lighting equipment and a display pixel parts. 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。 For example, if it's set lamp summarizes six LED, even if disconnection one LED therein, if the remaining five LED is emitting light normally, are not impaired is so large feature Absent. 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, in the circuit in which the six all in series, all of the LED if disconnected even one does not emit light.

【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。 [0004] Therefore the prior art often employ a mixed circuit of series-parallel so as to connect for example a series circuit of three LED into two sets in parallel. この例であれば、1個のLE If this example, one 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。 When D is disconnected, although the series of three LED containing it does not emit light, three remaining is capable of emitting light. 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。 But to decrease function by breaking large, complex additional circuitry for taking the current balance of parallel circuit is also necessary.

【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。 [0005] Incidentally, the disconnection fault of an LED is known to be easily caused by electrostatic stress. 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。 Therefore, in the manufacturing process of the LED-using apparatus, it has taken various measures to prevent static electricity is applied to the lead frame of each LED lamp. 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。 However even at the stage of implementing a number of LED in the printed circuit board, electrostatic charges can be applied to the LED through the wiring pattern of the printed wiring board. それにも関わらず従来は対策されていなかった。 Conventional spite of it had not been measures.

【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 [0006] The invention has been made in view of the conventional problems described above, and its object is also one in LED set ramp circuit of series connection type is broken will allow maintaining other LED possible emission LED from in and, also static electricity
を保護することにある。 It is to protect the. 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。 Another object is to provide a multi-color LED aggregate lamp employing such a LED aggregate lamp circuit.

【0007】 [0007]

【課題を解決するための手段】===請求項1の発明= Means for Solving the Problems === according to claim 1 invention =
== (1)複数個のLEDが直列接続されていて、このLE == (1) a plurality of LED is plugged in series, the 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。 D is a LED aggregate lamp circuit series circuit is connected to a common drive circuit. (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。 (2) one or more series of zener diodes connected in parallel with opposite polarities respectively to each LED. (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。 (3) one zener voltage of parallel zener diode circuit to the LED is slightly higher than the forward voltage drop 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。 [0008] === invention === plurality of LED of claim 2 have been connected in series, a LED aggregate lamp circuit the LED series circuit is connected to the common drive circuit, the LED series circuit both ends one or more series of zener diodes connected in LED opposite polarity of, LED set in the normal driving voltage of the LED series circuit, characterized in that it is configured not to conduct said Zener diode 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 [0009] === claim 3 of the invention === (1) multicolor L luminescence color different three kinds of LED are respectively implemented plurality mixed in a common printed circuit board
ED集合ランプである。 It is an ED set lamp. (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 (2) In the printed wiring board, a plurality of LED of the first emission color are connected in series, a plurality of LED of the second emission color are connected in series, a plurality of LED third emission color are connected in series and, first emission color LED series circuit and the second emission color 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。 ED series circuit and one end of each of the third emission color LED series circuit is commonly connected to the common terminal. (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。 (3) In the printed wiring board, one or a plurality series of Zener diodes connected in parallel with opposite polarities respectively to each LED, the parallel zener diode circuit thereto than the forward drop voltage of each LED a little higher of the Zener voltage. (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。 (4) In the printed wiring board, each between the respective other terminal and the common terminal of the first emission color LED series circuit, the second emission color LED series circuit, a third emission color LED series circuit, one or a plurality series of zener diodes are connected in LED and opposite polarity, zener diode circuit under normal driving voltage of each LED series circuit does not conduct.

【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。 DETAILED DESCRIPTION OF THE INVENTION are shown in FIGS. 1 to the configuration of the multi-color LED aggregate lamp according to an embodiment of the present invention. 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 Set the lamp of this embodiment is obtained by designing the pixel part of the display, six red LED11~1
6と3個の緑色LED21〜23と3個の青色LED3 6 and three green LED21~23 and three blue 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。 A lamp with high-density mounting and mixed with 1 to 33, which is the 1 dot of the pixels of 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。 [0011] FIG. 1 is an electrical wiring diagram of a multi-color LED set lamp. 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。 Six red LED11~16 are serially connected between the common terminal 1 and the red signal terminal 10. 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。 Pieces of green LED21~23 are serially connected between the common terminal 1 and the green signal terminal 20. 3個の青色LED31 Three blue 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。 To 33 are connected in series between the common terminal 1 and the blue signal terminal 30. 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。 Common terminal 1 is connected to the anode side of each LED series circuits. 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。 Although not shown, the common terminal 1 is connected to the positive terminal of the driving power source of the display device, the red signal terminal 10, green signal terminals 20, green light terminal 30 are respectively connected to the RGB output of the same dot of the drive circuit in the display device that.

【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。 [0012] Individual forward voltage drop of the red LED11~16 is 2.2 volts. この赤色LED11〜16 The red 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。 One single bypass Zener diode 2 of the Zener voltage of 2.4 volts is connected in parallel with opposite polarity. 緑色LED21〜23および青色LED31〜33 Green LED21~23 and blue LED31~33
の個々の順方向降下電圧は3.5ボルトである。 The individual forward voltage drop of 3.5 volts. これら緑色LED21〜23および青色LED31〜33の1 1 of these green LED21~23 and blue LED31~33
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。 One to One, the Zener voltage bypass Zener diode 3 of 3.9 volts connected in parallel with opposite 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。 Further, as between the common terminal 1 and the red signal terminal 10, and between the common terminal 1 and the green signal terminal 20, respectively between the common terminal 1 and the blue signal terminal 30, the Zener diode 4a · 4b · surge absorber 4c are connected in LED opposite polarity. このサージ吸収用ツェナーダイオード4 The surge absorption Zener diode 4
a〜4cのツェナー電圧は20ボルトであり、各LED Zener voltage of a~4c is 20 volts, the 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 Zener diode 4a in normal driving voltage of the series circuit
〜4cは導通しない。 ~4c does 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。 [0014] Figure a mounting structure of a multi-color LED aggregate lamp shown in FIG. 1 2, 3, is shown in FIG. 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。 2 and 3 are represented around the wiring pattern of the printed wiring board 5 of the set lamp. 印刷配線板5は両面基板であり、 Printed circuit board 5 is double-sided board,
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。 Figure 2 is front, FIG. 3 is a back side, the key point of the top and bottom sides of the wiring pattern are connected by through holes. 図4は合計12 Figure 4 is a total of 12
個の前記LEDの実装レイアウトを示している。 It shows a mounting layout of pieces of the LED. 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 Thus implementing the 12 LED on the front side of the printed circuit board 5 by the color mixing, the Zener diode 2 for 12 Bypass
と3、および3個のサージ吸収用ツェナーダイオード4 When 3, and three surge absorbing zener diode 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。 By implementing a~4c on the back side of the printed wiring board 5, the circuit basis will 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 According the Effects of the Invention] The present invention, also one among the plurality of LED's connected in series with disconnection failure, the LE
Dと並列のツェナーダイオードが導通して残りのLED The remaining LED and conducts D in parallel with Zener diode
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。 Since the driving current flows in the remaining LED is capable of emitting light, it continues to function as a LED aggregate lamp. 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。 In other words, even happening disconnection failure of the LED can halt the damage to a minimum. 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 According the present invention, when a large static electricity from the outside to the terminal portion of the LED series circuit is applied, since the surge current flows through the Zener diode circuit connected in parallel to the LED series circuit, harmful surge LE
Dに印加されるのを防ぐことができる。 It can be prevented from being applied to the D.

【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 [1] multicolor LED according to an embodiment of the present invention
集合ランプの電気結線図である。 It is an electrical connection diagram of the set 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。 2 is a configuration diagram of a front side of the printed circuit board of the set lamp according to the exemplary embodiment.

【図3】同上印刷配線板の裏側の構成である。 3 is a back side configuration of the same printed circuit 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。 4 is a mounting layout view of an LED in the front side of the same printed circuit board.

【符号の説明】 DESCRIPTION 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 1 common terminal 2 bypass Zener diode 3 bypass Zener diode 4a~4c surge absorbing zener diode 5 printed wiring board 10 red terminals 11-16 red LED 20 green signal terminals 21 to 23 green LED 30 blue signal terminals 31-32 blue LED 5 printed wiring board

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 つぎの事項(1)(2)(3)により特定される発明。 1. A following items (1) (2) invention as defined by (3). (1)複数個のLEDが直列接続されていて、このLE (1) a plurality of LED is plugged in series, the 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。 D is a LED aggregate lamp circuit series circuit is connected to a common drive circuit. (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。 (2) one or more series of zener diodes connected in parallel with opposite polarities respectively to each LED. (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。 (3) one zener voltage of parallel zener diode circuit to the LED is slightly higher than the forward voltage drop of the LED.
  2. 【請求項2】 複数個のLEDが直列接続されていて、 2. A plurality of LED is plugged in series,
    このLED直列回路が共通の駆動回路に接続されるLE LE this LED series circuit is connected to the common drive circuit
    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 A D set the lamp circuit, one or a plurality series of zener diode LED to both ends of the LED series circuit
    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。 And is connected in reverse polarity, LED aggregate lamp circuit in the normal driving voltage, characterized in that it is configured not to conduct said Zener diode of the LED series circuits.
  3. 【請求項3】 つぎの事項(1)〜(4)により特定される発明。 Wherein the invention specified by the following matters (1) to (4). (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 (1) multicolor L luminescence color different three kinds of LED are respectively implemented plurality mixed in a common printed circuit board
    ED集合ランプである。 It is an ED set lamp. (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 (2) In the printed wiring board, a plurality of LED of the first emission color are connected in series, a plurality of LED of the second emission color are connected in series, a plurality of LED third emission color are connected in series and, first emission color LED series circuit and the second emission color 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。 ED series circuit and one end of each of the third emission color LED series circuit is commonly connected to the common terminal. (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。 (3) In the printed wiring board, one or a plurality series of Zener diodes connected in parallel with opposite polarities respectively to each LED, the parallel zener diode circuit thereto than the forward drop voltage of each LED a little higher of the Zener voltage. (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。 (4) In the printed wiring board, each between the respective other terminal and the common terminal of the first emission color LED series circuit, the second emission color LED series circuit, a third emission color LED series circuit, one or a plurality series of zener diodes are connected in LED and opposite polarity, zener diode circuit under normal driving voltage of each LED series circuit does not conduct.
JP3155599A 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
JP3155599A 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
JP3155599A 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 true JP2000231363A (en) 2000-08-22

Family

ID=12334442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3155599A Pending JP2000231363A (en) 1999-02-09 1999-02-09 Led set lamp circuit and multicolor led set lamp

Country Status (1)

Country Link
JP (1) JP2000231363A (en)

Cited By (11)

* 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
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 Illuminating device with high operation reliability and light source system using illuminating device
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
US10074645B2 (en) 2013-05-15 2018-09-11 Rohm Co., Ltd. LED module and method of manufacturing the same

Cited By (13)

* 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 Illuminating device with high operation reliability and light source system using illuminating device
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
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

Similar Documents

Publication Publication Date Title
US6194839B1 (en) Lattice structure based LED array for illumination
US6288497B1 (en) Matrix structure based LED array for illumination
US4870325A (en) Ornamental light display apparatus
US6201353B1 (en) LED array employing a lattice relationship
US20110068696A1 (en) Solid state lighting apparatus with configurable shunts
US20060232219A1 (en) Single driver for multiple light emitting diodes
US20060171135A1 (en) Light emitting apparatus
US5450301A (en) Large scale display using leds
US8604509B2 (en) Flexible pixel element and signal distribution means
US6249088B1 (en) Three-dimensional lattice structure based led array for illumination
US6268702B1 (en) Lamp for an external warning light
US20070115670A1 (en) Tiles for solid state lighting panels
US20130026925A1 (en) Solid State Lighting Apparatus and Methods Using Integrated Driver Circuitry
US20040004446A1 (en) Drive circuit for an led lighting apparatus
US7474681B2 (en) Alternating current light-emitting device
US20060176411A1 (en) Constant current driver, back light source and color liquid crystal display
JP2008059811A (en) Device and method for driving led
US20070236447A1 (en) Backlight unit using light emitting diode
US7544524B2 (en) Alternating current light-emitting device
US7621655B2 (en) LED lighting units and assemblies with edge connectors
JP2009130132A (en) Planar light emission type lighting system
US20130069536A1 (en) Solid-state lighting apparatus and methods using current diversion controlled by lighting device bias states
US7872430B2 (en) Solid state lighting panels with variable voltage boost current sources
JP2002350846A (en) Led back light
JPH11162233A (en) Light source device

Legal Events

Date Code Title Description
RD04 Notification of resignation of power of attorney

Effective date: 20040917

Free format text: JAPANESE INTERMEDIATE CODE: A7424

A621 Written request for application examination

Effective date: 20060125

Free format text: JAPANESE INTERMEDIATE CODE: A621

RD04 Notification of resignation of power of attorney

Effective date: 20060125

Free format text: JAPANESE INTERMEDIATE CODE: A7424

RD02 Notification of acceptance of power of attorney

Effective date: 20060125

Free format text: JAPANESE INTERMEDIATE CODE: A7422

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090616

A131 Notification of reasons for refusal

Effective date: 20090630

Free format text: JAPANESE INTERMEDIATE CODE: A131

A02 Decision of refusal

Effective date: 20091124

Free format text: JAPANESE INTERMEDIATE CODE: A02