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EP2299778B1 - Dispositif d'illumination et dispositif de commutation de la luminance correspondant - Google Patents

Dispositif d'illumination et dispositif de commutation de la luminance correspondant Download PDF

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Publication number
EP2299778B1
EP2299778B1 EP10197073A EP10197073A EP2299778B1 EP 2299778 B1 EP2299778 B1 EP 2299778B1 EP 10197073 A EP10197073 A EP 10197073A EP 10197073 A EP10197073 A EP 10197073A EP 2299778 B1 EP2299778 B1 EP 2299778B1
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EP
European Patent Office
Prior art keywords
luminance
switching device
changeover switch
light source
leds
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.)
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Application number
EP10197073A
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German (de)
English (en)
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EP2299778A1 (fr
Inventor
Rong-Tsung Lin
Yi-Sheng Lin
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Macroblock Inc
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Macroblock Inc
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    • 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]
    • H05B45/10—Controlling the intensity of the light

Definitions

  • the present invention relates to an illuminating device and a luminance switching device thereof, and more particularly to a luminance switching device with a built-in memory unit for providing a multi-stage switching of various illuminating devices.
  • LEDs light emitting diodes
  • a conventional domestic lighting lamp usually has a plurality of bulbs, and when a user wants to change the luminance state of the environment, a changeover switch is used to sequentially switch the plurality of bulbs in multiple stages according to a set value, so as to turn off the bulbs. For example, when the changeover switch is just turned on, all of the bulbs are in a turn-on state. When the changeover switch is turned off and then turned on again, at least one bulb is in a turn-off state, which results in the weakening of luminance of the light emitted by the entire lighting lamp.
  • the changeover switch When the changeover switch is turned off and then turned on again, at least one bulb that is in the turn-on state in the previous stage assumes the turn-off state.
  • the luminance of the lighting lamp can be switched in multiple stages.
  • the bulbs of the lighting lamp are replaced by LEDs, as the unit number of LEDs required in the bulbs is large, the luminance of the light emitted from the entire lighting lamp will be uneven if the LEDs of the lighting lamp are turned off sequentially according to the operating mode described above.
  • FIG. 1 is a schematic view of a conventional display system.
  • the conventional display system 10 includes two LEDs 12A, 12B, a display device 14, and a luminance detecting and control circuit 20 disposed in the display device 14.
  • the display device 14 includes an image display array 18 to display images of the display device 14.
  • the display device 14 further includes a controller 22 electrically connected to the luminance detecting and control circuit 20, for transmitting a timing and control signal to the luminance detecting and control circuit 20.
  • the two photo-detectors 16A and 16B are aligned with the LEDs 12A and 12B, and are electrically connected to the luminance detecting and control circuit 20 for detecting luminance of the light emitted by the LEDs 12A and 12B respectively.
  • the photo-detectors 16A and 16B detect the luminance of the light emitted by the LEDs 12A and 12B respectively, the detected luminance of the light is converted into a current signal, which is then transmitted to the luminance detecting and control circuit 20.
  • the controller 22 will output a modulation signal to the luminance detecting and control circuit 20 according to requirements of the user.
  • the luminance detecting and control circuit 20 integrates the signals from the photo-detectors 16A and 16B and the controller 22, and sends a voltage signal to modulate the luminance to be adjusted of the LEDs 12A and 12B respectively.
  • the luminance control of the light emitted from the LEDs 12A and 12B of the display device 14 is realized.
  • the luminance detecting and control circuit 20 controls the luminance of the light emitted by the LEDs 12A and 12B individually, the compensation can only be performed according to the insufficient luminance of the LEDs 12A, 12B detected by the photo-detectors 16A, 16B or the luminance to be adjusted. If the user wants to individually adjust the luminance of the light emitted by the LEDs 12A, 12B to luminance of different states, such that the display device 14 uses the LEDs 12A, 12B to show different brightness.
  • the photo-detectors 16A and 16B are influenced by the light emitted by the neighboring LEDs 12A, 12B, for example, the photo-detector 16A also detects the light emitted by the LED 12B, the object to control the LEDs 12A, 12B to emit light of different luminance cannot be achieved. Moreover, when the display device 14 uses a large number of LEDs, the luminance detecting and control circuit 20 cannot control the light of different luminance emitted by the LEDs in a specific state at the specific state again while prevent the problem of uneven luminance at the same time.
  • US 2006/0256049 A1 describes an automatic photo-colorimetric parameter control device for light boxes with colour LEDs for maintaining the photometric and calorimetric characteristics of an illumination at a given setpoint.
  • US 2006/0061300 A1 describes an illumination system having at least two light sources, and a method for operating such an illumination system, wherein a sensor device determines at least one feature of a light output and a setpoint selection device stores a setpoint of the feature.
  • the object of the present invention is to provide a luminance switching device for switching luminance of a plurality of light emitting states produced by an LED light source composed of at least one LED.
  • the present invention provides a luminance switching device according to claim 1.
  • the luminance switching device of the present invention includes a built-in memory unit, for storing the luminance value of the light emitted by each of the LEDs in each setting state. Therefore, each time after the changeover switch is switched, the LEDs will present the luminance value of the emitted light, and will not have the problem of uneven light that is caused by the influence of the light emitted from neighboring LEDs. Thus, the multi-stage switching of the luminance of the LED light source is provided.
  • FIG. 2A is a block diagram of functions of the illuminating device and the luminance switching device thereof according to the present invention.
  • the illuminating device of the present invention includes an LED light source 110 and a luminance switching device 100.
  • the LED light source is composed of at least one light emitting diode (LED) 120
  • the luminance switching device 100 is used for switching the luminance of a plurality of light emitting states produced by each of the LEDs 120 of the LED light source 110.
  • the luminance switching device 100 includes a changeover switch 130, a detecting circuit 60, a memory unit 70, and a power conversion circuit 90.
  • the LEDs 120 of the LED light source 110 can be connected in series, in parallel, or in series and parallel, so as to form some special patterns.
  • the changeover switch 130 is electrically connected to the detecting circuit 60 of the luminance switching device 100, so as to switch the plurality of light emitting states produced by the LEDs 120 of the LED light source 110. Moreover, the changeover switch 130 has a plurality of switching modes corresponding to the light emitting states.
  • the detecting circuit 60 is electrically connected to the changeover switch 130, for detecting the corresponding switching modes of the changeover switch 130.
  • the memory unit 70 is electrically connected to the detecting circuit 60, for storing a luminance value of light emitted by each of the LEDs 120 corresponding to a certain switching mode of the changeover switch 130 detected by the detecting circuit 60, and converting the luminance value of each of the LEDs 120 into a luminance control signal.
  • the power conversion circuit 90 is an alternate current (AC)/ direct current (DC) converter, which is electrically connected between the detecting circuit 60 and the LED light source 110, for transmitting the luminance control signal from the detecting circuit 60 to the LED light source 110, and converts the AC power input to the luminance switching device 100 of the light source by an external power source 150 into a DC power that can be received and used by the luminance switching device 100 and the LED light source 110.
  • the power conversion circuit 90 of the present invention can also be a DC/DC converter.
  • the external power source 150 is a DC power source, for providing power to the luminance switching device 100 and the LED light source 110.
  • FIG. 2B is a simplified circuit diagram of the detecting circuit 60 of FIG 2A .
  • the detecting circuit 60 of the present invention includes an amplifier 62 and an analog/digital conversion circuit 64.
  • a forward input end of the amplifier 62 is used for receiving the luminance signal e.g. a current signal of each of the LEDs 120 in the LED light source 110, and a backward input end of the amplifier 62 is electrically connected to the changeover switch 130.
  • the analog/digital conversion circuit 64 is electrically between the amplifier 62 and the memory unit 70, for converting an analog control signal transmitted from the amplifier 62 and the memory unit 70 into a digital control signal, and transmitting the digital control signal to the power conversion circuit 90.
  • the power conversion circuit 90 then converts the digital control signal into a luminance control signal, which is used to control the luminance of the light emitted by each of the LEDs 120 in the LED light source 110.
  • the luminance switching device 100 can adjust the luminance value of the light emitted by each of the LEDs 120 in the LED light source 110 precisely, and the operating principle is described as follows. Referring to FIGs. 2A and 2B again, when the changeover switch 130 is OFF, the luminance switching device 100 detects the luminance of the light emitted by each of the LEDs 120 in the LED light source 110, and a luminance signal 112 is input to the forward input end of the detecting circuit 60 via a signal feed-in end 102 of the luminance switching device 100.
  • the luminance signal 112 can be a current signal, which carries the luminance value of the light emitted from each of the LEDs 120 of the LED light source 110.
  • the luminance signal 112 is then converted into a digital signal by the analog/digital conversion circuit 64 and transmitted to the memory unit 70.
  • the memory unit 70 stores the luminance state of the light emitted by each of the LEDs 120.
  • the changeover switch 130 is turned on, the plurality of LEDs 120 in the LED light source 110 assumes the same or different luminance states according to an originally set state (it is assumed that all of the LEDs 120 are in the turn-on state, and the luminance of the light emitted by the LEDs 120 is the same), and the memory unit 70 stores the luminance value of the light emitted by each of the LEDs 120.
  • the luminance state of each of the LEDs 120 stored in the memory unit 70 is converted into an analog signal by a conversion interface (not shown), and the analog signal is transmitted to the analog/digital conversion circuit 64. Then, the control signal of the luminance value of the light emitted by each LED 120 that is required to reach the originally set state is transmitted to the power conversion circuit 90, so as to convert the control signal into a luminance control signal 114 that can be received by the LED light source 110, such that each LED 120 assumes the preset luminance value.
  • the luminance control signal 114 can be a pulse width modulation (PWM) signal, a voltage control signal, or a current control signal.
  • the luminance switching device 100 controls the luminance value of the light emitted by each LED 120 according to the originally set state. For example, at this time, the luminance of the light emitted by at least one LED 120 is reduced, such that the image presented by the entire LED light source 110 shows different visual effects due to the luminance change of the LEDs 120.
  • the memory unit 70 of the present invention can store different luminance values that the LEDs 120 will present according to the original setting each time after the changeover switch 130 is turned on, the luminance value that each of the LEDs 120 in the LED light source 110 will present can be controlled, and the problem of uneven light caused by the influence of neighboring LEDs 120 will not occur.
  • FIG 3 is a schematic view of another implementation aspect of the LED light source 110 of the present invention.
  • a DC power source 140 is connected to the LED light source 110 externally, which is used as the power source of the LEDs 120 directly.
  • Other parts of this embodiment are the same as those of the above embodiment, and will not be described herein again.
  • the changeover switch 130 of the present invention can be a common switch, which provides an external trigger signal to the luminance switching device 100 through a manual switching motion.
  • the external trigger signal can be a continuous pressing signal.
  • a user can press the changeover switch 130 with a hand continuously, with the increase of the time that the user presses and holds the changeover switch, the luminance of the LEDs 120 of the LED light source 110 in the continuous switching mode will increase or reduce accordingly.
  • the external trigger signal can also be a multi-stage pressing signal. The user can set the changeover switch 130 to a plurality of switching modes according to a preset interval of time.
  • the changeover switch 130 When the user presses the changeover switch 130 continuously by hand, with the increase of the time that the user presses and holds the changeover switch, the luminance of the LEDs 120 of the LED light source 110 in this continuous switching mode will increase in multiple stages or decrease in multiple stages.
  • the external trigger signal can also be a multi-stage switching signal.
  • the user can define the switching times of the changeover switch 130 to a plurality of switching modes. When the user switches the changeover switch 130 by hand, the luminance of the LEDs 120 of the LED light source 110 in this switching mode will increase in multiple stages or decrease in multiple stages as well.
  • the changeover switch 130 can also be a programmable circuit used with a computer, so as to realize the multi-stage switching of the LEDs 120 of the LED light source.
  • the luminance switching device 100 of the present invention is not only applicable to general LED display devices, but also to multi-stage lighting lamps, decorating lamps with variable colors, lighting lamps with variable colors, and the like, as long as the LED light source is composed of LEDs emitting light of different colors (R, G, and B).
  • the illuminating device and the luminance switching device 100 thereof include a built-in memory unit, which stores the luminance value of the light emitted by each of the LEDs in each of the preset switching mode of the changeover switch 130. Therefore, each time after the changeover switch is switched, the LEDs can present the required luminance values of the light, and the problem of uneven light caused by the influence of the light emitted by neighboring LEDs 120 is prevented.

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Television Receiver Circuits (AREA)

Claims (14)

  1. Dispositif de commutation de la luminance (100) destiné à commuter la luminance d'une pluralité d'états d'émission de lumière produits par une source de lumière (110) à diodes électroluminescentes (LED) comprenant au moins une LED (120), le dispositif de commutation de la luminance (100) comprenant :
    un commutateur (130), électriquement relié au dispositif de commutation de la luminance (100), destiné à commuter les états d'émission de lumière de la LED (120), lequel commutateur (130) présente une pluralité de modes de commutation correspondant à la pluralité d'états d'émission de lumière ;
    un circuit de détection (60), électriquement relié au commutateur (130), destiné à détecter les modes de commutation du commutateur (33) ; et caractérisé par :
    une unité de mémoire (70), électriquement reliée au circuit de détection (60), destinée à stocker des valeurs de luminance préréglées selon un réglage initial pour chacune des LED (120) pour chacun des modes de commutation du commutateur (130), convertir les valeurs de luminance des LED (120) en un signal de commande de la luminance (114), et transmettre le signal de commande de la luminance (114) au circuit de détection (60) ; et
    un circuit de conversion de puissance (90), électriquement relié à la source de lumière LED (110), destiné à recevoir le signal de commande de la luminance (114) transmis par le circuit de défection (60), de sorte que les LED (120) produisent les valeurs de luminance préréglées des états d'émission de lumière correspondant aux modes de commutation.
  2. Dispositif de commutation de la luminance (100) selon la revendication 1, dans lequel la luminance d'au moins une LED (120) de la source de lumière LED (110) est différente dans un mode de commutation différent du commutateur (130).
  3. Dispositif de commutation de la luminance (100) selon la revendication 1, comprenant en outre une source d'alimentation extérieure (150) destinée à fournir une alimentation au dispositif de commutation de la luminance (100).
  4. Dispositif de commutation de la luminance (100) selon la revendication 1, comprenant en outre une source d'alimentation en courant continu (CC) (140) électriquement reliée à la source de lumière LED (110), destinée à fournir une alimentation à la source de lumière LED (110).
  5. Dispositif de commutation de la luminance (100) selon la revendication 1, dans lequel le circuit de détection (60) comprend :
    un amplificateur (62) présentant une borne d'entrée avant destinée à recevoir les états d'émission de lumière de chacune des LED (120) de la source de lumière LED (110), et une borne d'entrée arrière électriquement reliée au commutateur (130) destinée à recevoir les modes de commutation du commutateur (130) ; et
    un circuit de conversion analogique-numérique (64) électriquement relié à l'amplificateur (62) et à l'unité de mémoire (70), destiné à convertir un signal de commande analogique transmis par l'amplificateur (62) et l'unité de mémoire (70) en un signal de commande numérique.
  6. Dispositif de commutation de la luminance (100) selon la revendication 2, dans lequel le commutateur (130) exécute les modes de commutation de la source de lumière LED (110) par l'intermédiaire d'un signal de déclenchement extérieur.
  7. Dispositif de commutation de la luminance (100) selon la revendication 6, dans lequel le signal de déclenchement extérieur est un signal d'appui continu, et les valeurs de luminance des LED (120) de la source de lumière LED (110) sont directement ou inversement proportionnelles à la durée d'appui sur le commutateur (130).
  8. Dispositif de commutation de la luminance (100) selon la revendication 6, dans lequel le signal de déclenchement extérieur est un signal de commutation à plusieurs paliers, et les valeurs de luminance des LED (120) de la source de lumière LED (110) croissent en multiples paliers ou décroissent en multiples paliers en fonction du nombre de fois où le commutateur (130) est commuté.
  9. Dispositif de commutation de la luminance (100) selon la revendication 6, dans lequel le signal de déclenchement extérieur est un signal de pression à plusieurs paliers, un intervalle de temps prédéterminé existe entre les modes de commutation, et les valeurs de luminance des LED (120) de la source de lumière LED (110) croissent en multiples paliers ou décroissent en multiples paliers en fonction de la durée de l'appui sur le commutateur (130).
  10. Dispositif de commutation de la luminance (100) selon la revendication 6, comprenant en outre une borne d'entrée de signal destinée à recevoir le signal de déclenchement extérieur.
  11. Dispositif de commutation de la luminance (100) selon la revendication 1, dans lequel le commutateur (130) est un circuit programmable.
  12. Dispositif de commutation de la luminance (100) selon la revendication 1, dans lequel le circuit de conversion de puissance (90) est un convertisseur de courant alternatif (CA)/courant continu (CC).
  13. Dispositif de commutation de la luminance (100) selon la revendication 1, dans lequel le circuit de conversion de puissance (90) est un convertisseur (CC)/(CC).
  14. Dispositif de commutation de la luminance (100) selon la revendication 1, dans lequel le signal de commande de la luminance (114) délivré en sortie par le circuit de conversion de puissance (90), est un signal à modulation de largeur d'impulsion (PWM) ou un signal de tension ou un signal de courant.
EP10197073A 2006-11-24 2007-01-12 Dispositif d'illumination et dispositif de commutation de la luminance correspondant Active EP2299778B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2006101452533A CN100521839C (zh) 2006-11-24 2006-11-24 照明装置及其亮度切换装置
EP07100454A EP1926350B1 (fr) 2006-11-24 2007-01-12 Dispositif d'illumination et dispositif de commutation de la luminance correspondant

Related Parent Applications (1)

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EP07100454.3 Division 2007-01-12

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EP2299778A1 EP2299778A1 (fr) 2011-03-23
EP2299778B1 true EP2299778B1 (fr) 2012-06-27

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EP10197073A Active EP2299778B1 (fr) 2006-11-24 2007-01-12 Dispositif d'illumination et dispositif de commutation de la luminance correspondant
EP07100454A Active EP1926350B1 (fr) 2006-11-24 2007-01-12 Dispositif d'illumination et dispositif de commutation de la luminance correspondant

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CN (1) CN100521839C (fr)
AT (1) ATE493866T1 (fr)
DE (1) DE602007011557D1 (fr)
ES (2) ES2355987T3 (fr)

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CN102014539B (zh) * 2009-09-08 2013-08-21 群康科技(深圳)有限公司 背光控制电路
WO2011041817A2 (fr) * 2009-10-07 2011-04-14 Tridonic Gmbh & Co. Kg Procédé d'excitation d'appareils de commande de luminaires
CN102137532B (zh) * 2010-01-21 2014-08-20 顺鹏科技股份有限公司 一种led驱动控制装置及其控制方法
CN102098854B (zh) * 2010-05-20 2013-08-21 深圳市齐创美科技有限公司 一种调光驱动方法
CN102264175A (zh) * 2010-05-26 2011-11-30 马士科技有限公司 一种可分级调光的发光二极管灯调光装置
KR101124478B1 (ko) * 2010-06-25 2012-03-19 엘에스산전 주식회사 엘이디 조명의 조도 자동 제어장치
CN103262399B (zh) * 2010-11-04 2017-02-15 皇家飞利浦有限公司 用于控制开关功率转换器中的能量消耗的方法和装置
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KR101216677B1 (ko) 2011-04-14 2012-12-28 서영석 Ｌｅｄ조명용 ａｃ－ｄｃ컨버터의 제어기
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CN103068123A (zh) * 2012-12-25 2013-04-24 生迪光电科技股份有限公司 一种可调节光照强度的led灯
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Publication number Publication date
ATE493866T1 (de) 2011-01-15
CN101193474A (zh) 2008-06-04
EP1926350B1 (fr) 2010-12-29
CN100521839C (zh) 2009-07-29
EP2299778A1 (fr) 2011-03-23
ES2355987T3 (es) 2011-04-01
EP1926350A1 (fr) 2008-05-28
DE602007011557D1 (de) 2011-02-10
ES2389087T3 (es) 2012-10-23

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