WO2006074573A1 - Lampe a semi-conducteurs - Google Patents

Lampe a semi-conducteurs Download PDF

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Publication number
WO2006074573A1
WO2006074573A1 PCT/CN2005/000045 CN2005000045W WO2006074573A1 WO 2006074573 A1 WO2006074573 A1 WO 2006074573A1 CN 2005000045 W CN2005000045 W CN 2005000045W WO 2006074573 A1 WO2006074573 A1 WO 2006074573A1
Authority
WO
WIPO (PCT)
Prior art keywords
semiconductor light
light emitting
semiconductor
pulse
circuit
Prior art date
Application number
PCT/CN2005/000045
Other languages
English (en)
Chinese (zh)
Inventor
Waikei Huen
Yun Li
Lock Kee Rocky Poon
Zhengxiang Gao
Hongzhuan Ma
Wenying Zhang
Original Assignee
Waikei Huen
Yun Li
Lock Kee Rocky Poon
Zhengxiang Gao
Hongzhuan Ma
Wenying Zhang
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 Waikei Huen, Yun Li, Lock Kee Rocky Poon, Zhengxiang Gao, Hongzhuan Ma, Wenying Zhang filed Critical Waikei Huen
Priority to EP05700419A priority Critical patent/EP1837844A4/fr
Priority to PCT/CN2005/000045 priority patent/WO2006074573A1/fr
Publication of WO2006074573A1 publication Critical patent/WO2006074573A1/fr

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
    • G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
    • G09G3/14—Semiconductor devices, e.g. diodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0272—Details of drivers for data electrodes, the drivers communicating data to the pixels by means of a current
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant

Definitions

  • the present invention relates to a semiconductor lamp and, more particularly, to a power supply technique for a semiconductor lamp composed of a semiconductor light emitting element such as a light emitting diode (LED).
  • a semiconductor lamp composed of a semiconductor light emitting element such as a light emitting diode (LED).
  • Semiconductor luminescence technology is one of the most promising emerging high-tech fields in the 21st century.
  • semiconductor light-emitting elements have significant advantages such as long life, energy saving, safety, environmental protection, rich color, and miniaturization. They are another revolution in the history of human lighting following incandescent lamps and fluorescent lamps.
  • Semiconductor lamp technology is widely used in white light general lighting, decoration (landscape, home, leisure, commercial decoration) lighting, automotive and other transportation lighting, traffic signal display, background display, large screen, special work lighting, military lighting and tourism, Light industrial products and other fields.
  • the 4 watt semi-conductor lamp consumes about the same brightness as a 30-watt ordinary incandescent lamp, and has a lifetime that is more than 50 times that of an incandescent lamp, up to one million hours.
  • semiconductor light-emitting cells and arrays are powered by a rated direct current, and the corresponding DC voltage is supplied to the semiconductor light-emitting element according to the rated voltage of the semiconductor light-emitting element to cause the semiconductor light-emitting element to normally emit light.
  • the alternating current is converted into its rated current.
  • the direct current of the voltage the semiconductor lamp can work normally. Since the light intensity emitted by the semiconductor light-emitting element unit is limited, it is necessary to use a multi-semiconductor light-emitting unit array to collectively emit light for a general electric appliance.
  • each of the light-emitting units is powered by a set of circuits, not only the wiring is complicated, but also the power consumption is high. Moreover, it is not possible to solve the difference in luminance of the light-emitting cells due to manufacturing variations and it is difficult to adjust, and even if the brightness of each circuit unit is made uniform by the circuit, the structure of the circuit is very complicated and costly.
  • a single LED with a luminance of less than 20000 md requires a DC operating voltage of typically 3V and a constant current of 20 amps.
  • a semiconductor lamp generally consists of several It consists of hundreds of LED clusters, providing 20 amps to one LED with a certain number of electronic circuits. It is a difficult problem to provide 20 amps of constant current to hundreds of LED clusters at a low cost.
  • the power supply lines used are complicated. Many LEDs do not use constant current to supply power. It is easy to have insufficient brightness when the current is small. When the current is large, the life of the LED is reduced. Generally, the brightness of the LED is uneven, unstable, and the effect is very good. difference. Therefore, providing 20 amps of constant current for hundreds of LED clusters is the key technology to ensure the long-life and normal illumination of LED lighting fixtures. Summary of the invention
  • One of the technical problems to be solved by the present invention is to provide a novel power supply mode for a light-emitting array composed of a semiconductor light-emitting element (for example, an LED), which saves power compared with the conventional power supply mode, and can save energy.
  • a semiconductor light-emitting element for example, an LED
  • One of the technical problems to be solved by the present invention is to provide a novel power supply mode for a light-emitting array composed of a semiconductor light-emitting element (for example, an LED), which can uniformly drive each light-emitting unit of the light-emitting array, thereby making the light-emitting array uniform. Glowing effect.
  • a semiconductor light-emitting element for example, an LED
  • the technical problem to be solved by the invention is to provide a novel power supply mode for the light-emitting array composed of the semiconductor light-emitting elements, so that the power supply circuit has superior performance, simple design, easy integration, convenient adjustment, thereby reducing manufacturing cost and being easy to be practical. And popular.
  • the present invention provides a semiconductor light emitting module, comprising: a light emitting array composed of a plurality of semiconductor light emitting elements; a power supply circuit that supplies a supply voltage in a pulse form to each of the semiconductor light emitting elements in the light emitting array, thereby causing the The luminance of the semiconductor light-emitting element is substantially the same as the luminance of the long-pass constant DC of the semiconductor light-emitting element.
  • the duty ratio is more preferably a duty ratio of about 75%.
  • the supply voltage in the form of a pulse saves energy compared to the conventional DC power supply, achieving energy savings.
  • the power supply circuit includes: a pulse generator for generating a pulse; and a shift multiplexer for converting a pulse generated by the pulse generator into a pulse for simultaneously supplying power to each semiconductor light emitting element. .
  • the shift multiplexer is an integrated circuit, such as
  • each of the parallel outputs of the integrated circuit HM62726 drives a plurality of semiconductor light emitting elements, preferably two.
  • the present invention provides a power supply pulse for a light-emitting array composed of a semiconductor light-emitting element by using an easily integrated shift register, thereby avoiding a solution in which each light-emitting unit is powered by a single circuit, which makes the circuit simple and consumes less power.
  • An integrated circuit having a constant current source is used to unify the luminance of each of the light-emitting elements in the light-emitting array, and the semiconductor lamp thus composed can have a uniform light-emitting effect.
  • the present invention facilitates the utilization of various general-purpose or application-specific integrated circuit modules, the production cost is reduced, the power supply circuit and the entire device volume are reduced, and the power supply, clock, control, and load expansion are solved by the circuit design of the single unit, which is advantageous for commercialization. , practical and product popularization.
  • the pulse generator is duty cycle adjustable.
  • the pulse generator is constructed using an integrated circuit, such as a 555 time base circuit.
  • the power supply circuit has an external circuit for adjusting the luminance of each of the semiconductor light emitting elements.
  • a means for converting the external AC mains voltage to a DC voltage is also included so that the semiconductor lighting module can operate under any power source.
  • the present invention also provides a semiconductor lamp that can be integrated from a plurality of the above-described semiconductor light emitting modules.
  • the semiconductor lamp of the present invention comprises:
  • a pulse generator as described above for generating a pulse; a plurality of semiconductor light emitting modules, each of the semiconductor light emitting modules comprising: a light emitting array comprising a plurality of semiconductor light emitting elements; the shifting multiplexer described above,
  • the pulse generator generates a rushing; a constant current source capable of providing a constant current output to the luminescent array of semiconductor light emitting elements.
  • FIG. 1 is a diagram illustrating a duty ratio of a power supply pulse applied to a semiconductor light emitting element.
  • FIG. 2 is a circuit block diagram of a semiconductor light emitting module according to an embodiment of the present invention.
  • Figure 3 is a circuit diagram showing the function of a shift register in accordance with one embodiment of the present invention.
  • FIG. 4 is a functional block diagram of a 16-bit LED constant current driving dedicated integrated circuit HM62726 according to an embodiment of the present invention
  • Figure 5 is a circuit diagram of a power supply circuit using an integrated circuit in accordance with one embodiment of the present invention.
  • Figure 6 is an electrical diagram of a semiconductor light emitting module in accordance with another embodiment of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION The following embodiment exemplifies a semiconductor light emitting array composed of light emitting diodes (LEDs), and a semiconductor lamp formed thereby.
  • LEDs light emitting diodes
  • a single LED with a luminance of less than 20000mcd requires a DC operating voltage of one. Generally 3V, the current is constant at 20 amps.
  • Fig. 1 exemplarily shows a pulse waveform at a duty ratio of 75%.
  • the invention adopts the characteristics of the shift register multi-channel constant current output and the corresponding electronic circuit to obtain a constant current source for simultaneously supplying power to a plurality of semiconductor light-emitting monomers (for example, an array of light-emitting diodes); using a general-purpose or special integrated block (for example: HM62672) Providing simultaneous supply of multiple semiconductor light-emitting cells (such as light-emitting diode arrays), which ensures that the array elements emit light in uniform intensity while solving power supply, clocking, control and load expansion with simple electronic circuitry.
  • 2 illustrates a block diagram of a power supply circuit of a semiconductor light emitting module in accordance with one embodiment of the present invention.
  • a semiconductor light emitting module of the present invention includes a pulse generator 10, a shift multiplexer (and constant current source) 20, and a semiconductor light emitting cell array 30 composed of a plurality of semiconductor light emitting units.
  • the semiconductor light emitting unit array 30 itself constitutes a semiconductor lamp, or a plurality of semiconductor light emitting unit arrays 30 form a larger array to constitute a larger area semiconductor lamp, and those skilled in the art can understand such a convenient expansion mode.
  • FIG. 3 is a functional schematic diagram of a shift multiplexer (and constant current source) 20, in accordance with one embodiment of the present invention.
  • the figure shows a 16-bit shift register acting as a shift multiplexer 20, receiving a pulse train from the pulse generator 10 at its serial input or shift clock terminal CLK, which is converted into an output terminal ⁇ 5, ⁇ , , A parallel output pulse of ⁇ ,, thereby driving a plurality of semiconductor light emitting units simultaneously.
  • each output terminal drives a semiconductor light emitting unit (LED 60), and a plurality of semiconductor light emitting units (16 shown in the figure) constitute a semiconductor light emitting unit array 30.
  • LED 60 semiconductor light emitting unit
  • 16 shown in the figure constitute a semiconductor light emitting unit array 30.
  • each shift register can have the required frequency and pulse duty ratio.
  • shift multiplexer 20 can be any digital shift register.
  • the figure shows that each of the output terminals ⁇ , ⁇ , and ⁇ ⁇ drives one semiconductor light-emitting unit, but those skilled in the art should understand that each output can drive two or each output according to the load capacity and expected performance of the circuit. More semiconductor light emitting units are formed to form a semiconductor lamp having any number of light emitting cells.
  • Embodiments of the present invention also preferably use a constant current source to drive the semiconductor light emitting unit, which enables each semiconductor light emitting unit to maintain a uniform light emitting brightness, thereby facilitating the formation of a practical semiconductor light.
  • the current of each semiconductor light emitting unit is preferably adjustable (e.g., the illustrated "output current amount adjuster") such that each semiconductor light emitting unit has maximum luminance at a particular pulse operating frequency and duty cycle.
  • FIG. 4 shows a more detailed functional block diagram when FIG. 3 employs a 16-bit LED constant current drive application specific integrated circuit HM62726 as a multiplexed shift register.
  • reference numeral 200 generally indicates the structure of the integrated circuit HM62726, including a 16-bit shift register 50 having a shift register serial data input terminal SDI, a data shift clock CLK, and a serial data output terminal SDO; A 16-bit output latch 70 that controls the transfer or hold of data according to the state of the data latch terminal LE; a 16-bit output driver 80 that controls the transfer or hold of data according to the state of the data enable terminal; R-EXT is The constant current regulating terminal is controlled by, for example, an external circuit composed of an external resistor (for example, R5 in Fig. 5), whereby the brightness of each of the light emitting units can be adjusted, for example, the brightness of each of the light emitting units can be adjusted to the maximum.
  • an external circuit composed of an external resistor (for example, R5 in Fig. 5), whereby the brightness of each of the light emitting units can be adjusted, for example, the brightness of each of the light emitting units can be adjusted to the maximum.
  • each of the output terminals drives a semiconductor light emitting unit (LED) 60, and a plurality of semiconductor light emitting cells (16 are shown) constitute a semiconductor light emitting cell array 30.
  • LED semiconductor light emitting unit
  • each output can drive two or more semiconductor light emitting units depending on the circuit load capacity or desired performance requirements to form a semiconductor lamp having any number of light emitting cells.
  • various control terminals (such as the latch terminal LE or the enable terminal) can be used to provide various flexible connection modes for the power supply circuit design.
  • Fig. 5 is a detailed circuit diagram showing a power supply circuit using an integrated circuit.
  • the 555 time base circuit 100, the resistors R3, R4, R5, C2, and C3 constitute an oscillating circuit as a pulse generator.
  • a circuit composed of R2 and C1 is added to improve the waveform of the pulse square wave.
  • the 555 time base circuit and the HM62726 integrated circuit are both connected to the constant current source Vcc, and one end of each semiconductor light emitting unit LED 60 is connected to the constant current source Vcc, and the other end thereof is connected to the output end of the 16-bit power output driver controlled by 5, ⁇ , ..., ⁇ 5.
  • the 555 time-base integrated circuit square wave 3 terminal directly acts as the clock CLK of ⁇ 62726, and the C1R2 parallel phase with the same phase acts as the control signal of the semiconductor lamp composed of the driving LED:
  • the output When 51 is positive, the output is high. Voltage, the light does not illuminate. When it is negative, the output is low and the light is on. That is, the oscillating signal directly controls the on and off of the respective semiconductor light emitting unit LEDs 60 at the same time.
  • the optional external resistor R5 of the R-EXT terminal constitutes an external circuit for adjusting the luminance of each of the semiconductor light-emitting elements, and the brightness of each of the light-emitting units is maximized by adjusting the resistor R5, or each light-emitting unit is brought to a desired level.
  • Luminous brightness From the circuit of FIG. 5 and FIG. 4, by using the shift multiplexer in the form of the integrated circuit HM62726, each semiconductor light-emitting unit makes full use of the constant current source of the integrated shift multiplexer to ensure the individual light-emitting cells. The uniformity of the luminous intensity ensures that the formed semiconductor lamp has an excellent luminous effect. At the same time, it is ensured that the same pulse having the desired frequency and duty ratio can be simultaneously applied to the respective semiconductor light emitting units.
  • the pulse waveform emitted from the pulse generator and applied to the HM62726 integrated circuit CLK or the control terminal and the driving voltage pulse waveform applied to each of the semiconductor light emitting unit LEDs 60 are substantially The opposite phase. That is, for a pulse waveform of 75% duty ratio, the non-empty pulse period applied to each semiconductor light-emitting unit is 25%. Therefore, a semiconductor lamp composed of a semiconductor light-emitting diode driven by this method can achieve an energy saving effect of 75%.
  • FIG. 5 exemplarily shows the case where each output terminal drives two LEDs 60, so that an HM62726 integrated circuit can be used to drive a light-emitting array composed of 32 light-emitting units, but those skilled in the art should understand that according to the circuit Load capacity and expected performance, each output can drive one or more semiconductor light emitting units to form a semiconductor lamp having a desired number of light emitting cells. It can also be understood that a larger area semiconductor lamp can be formed by splicing any of the above plurality of light-emitting modules.
  • a larger area of a semiconductor lamp can use the same pulse generator, including any number of the above-described array of 32 illumination units and a corresponding number of The HM62726 integrated circuit 200 is used as a shift multiplexer (and constant current source).
  • a burst from pulse generator 10 can be received at serial data input SDI of 16-bit shift register 50, through each control terminal (eg, latch terminal LE or enable terminal 5i) Control and clock drive are converted to outputs ⁇ , ⁇ ,
  • the parallel output pulse of 5D3 ⁇ 4 drives a plurality of semiconductor light emitting units (LEDs) 60 at the same time, and each output has a frequency and a pulse duty ratio corresponding to the input terminals.
  • the serial output terminal SDO can be used as a pulse input of the next-level integrated circuit.
  • the pulse generator of the present invention is not limited to the pulse circuit constructed by the 555 time base circuit 100 of Fig. 5 described above, but any suitable pulse circuit can be employed.
  • the pulse circuit outputted by the above pulse circuit should have a determined frequency and duty ratio determined, for example, 50%-90% duty ratio, preferably 70%-80% duty ratio, Preferably, the duty ratio is about 75%, so that the luminance of the semiconductor light emitting diode 60 is almost the same as the luminance of the semiconductor light emitting diode with a constant direct current.
  • the pulse circuit can also be designed to be frequency adjustable or duty cycle adjustable, thereby obtaining a constant long pass with the semiconductor light emitting diode by adjusting the frequency or duty cycle of the pulse circuit.
  • the brightness of the direct current is almost the same as the brightness of the light, or the semiconductor light emitting diode is given the maximum light emitting brightness, or the semiconductor light emitting diode is given the desired light emitting brightness.
  • FIG. 6 Another embodiment of Figure 6 shows that any power source can be used with the semiconductor light emitting array or semiconductor lamp of the present invention.
  • the power supply circuit block diagram of the semiconductor light emitting module shown in FIG. 2 it also includes DC and AC power supplies of various voltages, and only needs to convert the power supply voltage (for example, commercial power 220V AC) to the rated voltage of the semiconductor through the transformer rectifier circuit 40.
  • jobs A constant current source under voltage e.g., integrated circuit DC operating voltage 5V, LED DC operating voltage 3V, etc.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Led Devices (AREA)

Abstract

L'invention porte sur un dispositif d'éclairage à semi-conducteurs comprenant une matrice d'éclairage constituée d'une pluralité de composants d'éclairage à semi-conducteurs; un circuit électrique qui génère une tension par impulsion dans chaque composant d'éclairage à semi-conducteurs de sorte que la luminance de la diode électroluminescente soit similaire à celle obtenue par un courant constant. D'autre part, pour une diode électroluminescente composée d'arsénure de gallium, sur la fréquence de 5KC, l'impulsion a un rapport utile de 50 à 90 %, de préférence de 70 à 80 %, idéalement de 75 %. L'invention porte également sur une lampe à semi-conducteurs constituée d'un dispositif d'éclairage à semi-conducteurs.
PCT/CN2005/000045 2005-01-12 2005-01-12 Lampe a semi-conducteurs WO2006074573A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05700419A EP1837844A4 (fr) 2005-01-12 2005-01-12 Lampe a semi-conducteurs
PCT/CN2005/000045 WO2006074573A1 (fr) 2005-01-12 2005-01-12 Lampe a semi-conducteurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/000045 WO2006074573A1 (fr) 2005-01-12 2005-01-12 Lampe a semi-conducteurs

Publications (1)

Publication Number Publication Date
WO2006074573A1 true WO2006074573A1 (fr) 2006-07-20

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ID=36677336

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2005/000045 WO2006074573A1 (fr) 2005-01-12 2005-01-12 Lampe a semi-conducteurs

Country Status (2)

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EP (1) EP1837844A4 (fr)
WO (1) WO2006074573A1 (fr)

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CN103687157A (zh) * 2012-09-21 2014-03-26 黄焕珠 一种动态式的led照明灯

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CN106251806B (zh) * 2016-09-29 2019-04-02 北京集创北方科技股份有限公司 Led显示装置及其驱动方法

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WO2003032689A1 (fr) 2001-10-05 2003-04-17 Koninklijke Philips Electronics N.V. Commande pwm d'ensembles a led
US20040150355A1 (en) * 2003-01-31 2004-08-05 Anden Co., Ltd/Denso Corporation Light emitting diode control device

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CN1172280A (zh) * 1996-05-31 1998-02-04 三田工业株式会社 照相制版部件
JPH10193683A (ja) * 1997-01-16 1998-07-28 Fuji Xerox Co Ltd 画像形成装置
CN2425428Y (zh) * 2000-04-30 2001-03-28 苏州半导体总厂 内置恒流源的led发光器件
CN2452246Y (zh) * 2000-10-20 2001-10-03 林文献 Led超宽限电压驱动器
WO2003032689A1 (fr) 2001-10-05 2003-04-17 Koninklijke Philips Electronics N.V. Commande pwm d'ensembles a led
US20040150355A1 (en) * 2003-01-31 2004-08-05 Anden Co., Ltd/Denso Corporation Light emitting diode control device
CN1558704A (zh) * 2003-01-31 2004-12-29 ������������ʽ���� 发光二极管控制装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103687157A (zh) * 2012-09-21 2014-03-26 黄焕珠 一种动态式的led照明灯

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EP1837844A4 (fr) 2011-06-08
EP1837844A1 (fr) 2007-09-26

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