WO2007143946A1 - Appareil émetteur de lumière par led commandable et son procédé de commande d'émission de lumière - Google Patents

Appareil émetteur de lumière par led commandable et son procédé de commande d'émission de lumière Download PDF

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Publication number
WO2007143946A1
WO2007143946A1 PCT/CN2007/070081 CN2007070081W WO2007143946A1 WO 2007143946 A1 WO2007143946 A1 WO 2007143946A1 CN 2007070081 W CN2007070081 W CN 2007070081W WO 2007143946 A1 WO2007143946 A1 WO 2007143946A1
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Prior art keywords
power
power supply
circuit
control unit
lighting device
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PCT/CN2007/070081
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English (en)
Chinese (zh)
Inventor
Jung-Hsiang Yao
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Jung-Hsiang Yao
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Publication of WO2007143946A1 publication Critical patent/WO2007143946A1/fr

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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]
    • H05B45/20—Controlling the colour of the light
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/155—Coordinated control of two or more light sources

Definitions

  • the invention relates to an improved controllable LED lighting device and a lighting control method thereof.
  • the present invention is based on a Chinese invention patent application filed on Jun. 09, 2006, with the application number of 200610035871. Background technique
  • LED lamps assembled from red, green and blue LEDs have been widely used.
  • LED lamps There are two main types of LED lamps: one is a fixed-color LED lamp, which sets three primary color LEDs during the manufacturing process. The respective LEDs are respectively used to make the LED lamps exhibit a certain fixed color.
  • Such LED lamps cannot produce any color-changing effect, and can only emit light of a certain color fixed in advance, and the illumination color is single, and the LED is required by the user.
  • the lamp is constantly changing color or changing to another color, the function is monotonous and cannot meet the demand; thus, another LED that can change color appears, which can automatically change during use.
  • Figure 1 reveals the common internal circuit structure of such a switchable color LED lamp.
  • the main working principle is as follows: Turn the 220V AC power supply into a suitable low-voltage DC power supply for use in the circuit, and shape it into a 50Hz square wave through the transistor Q29, and then feed it to the pin 10 of the counter U3.
  • the three primary colors LED1, LED2, and LED3 are driven by the adjacent three pins 12, 14, and 15 of the counter U3 frequency division, so that the light emitted by the LED lamp changes color with time.
  • the function of the main components of Figure 1 is described in detail below.
  • Capacitor C29 is used for step-down, bridge rectifier circuit BRG1 for rectification, capacitor C49 for filtering, Zener diode Z 19 for voltage regulation, these components can provide a stable low-voltage DC power supply for the circuit.
  • Resistors R79 and R89 divide the AC power supply AC voltage and current limit, and make the transistor Q29 work in the switching state and output a 50Hz square wave.
  • Resistor R59 is a pull-up resistor.
  • Resistors R9, Rl l, and R12 are used to limit LED1, LED2, and LED3.
  • LED1, LED2, and LED3 are red, green, and blue LEDs respectively (it is understandable that the order can be arbitrarily arranged according to actual conditions).
  • the resistors R39 and R25 in Figure 1 (the resistance of resistor R25 is much larger than the resistance of resistor R39) and the capacitor C19 provides a reset signal for counter U3:
  • the resistors R39 and R25 in Figure 1 ensure that pin 11 of U3 is high, so that all outputs of U3 are low.
  • the voltage at pin 11 of counter U3 drops rapidly until it goes low, after which counter U3 operates normally.
  • the functions of diodes D1, D3, and D4 are: When the three drive output pins 12, 14, and 15 of U3 are both high, capacitor C19 is discharged through resistor R25, and the voltage of pin 11 rises rapidly to reset counter U3.
  • the color change process of the switchable color LED lamp shown in Figure 1 is as follows: Counter U3 converts the 50 Hz input signal into a plurality of lower frequency output signals, assuming the levels of the drive output pins 15, 14, 12 in Figure 1. Change every 10 seconds, the results are: 000, 001, 010, 011, 100, 101, 110. Therefore, the colors of the lights we see are: white, red, green, yellow, blue, purple , Qing.
  • LED1, LED2, and LED3 are connected to different drive output pins of U3, different color change frequencies and color change sequences can be obtained.
  • the LED of the switchable color disclosed in FIG. 1 will remain in a discolored state after being turned on and cannot be stopped until power is lost, even if it is turned back on after power failure, the LED lamp will remain in a discolored state, The way of illuminating is still fixed. If the user prefers a certain color in some cases and needs to stop the discoloration and fix the LED light on the color, then the LED light disclosed in Figure 1 obviously cannot be done. To. For example, when reading, the user wants the LED light to maintain a relatively bright white light to avoid damage to vision; or, before the user sleeps, he or she wants to fix the LED light on a warm color such as pink to facilitate sleep, and the like. Such use requirements, such as the LED lights disclosed in Figure 1, are not achievable.
  • a first object of the present invention is to provide a controllable LED lighting device capable of realizing discoloration of an LED lighting device while also locking the current display color at any time;
  • controllable LED lighting device of the present invention comprises: a power source;
  • control unit connected to the power source and controlling the three primary color LEDs
  • the energy storage component is disposed in the power circuit for storing electrical energy, and releasing the electrical energy to the control unit when the illuminating device is in a power-off state;
  • the power failure detecting circuit is connected between the power source and the control unit for detecting the gain and loss state of the power source and transmitting the status signal to the control unit.
  • the illumination control method of the controllable LED illumination device of the present invention comprises the following steps:
  • the three primary color LEDs are illuminated in the specified combination order, and the multi-color rotation display is presented;
  • the second step during the process of multi-color rotation display, it is detected whether the power supply is de-energized. If the power supply is not de-energized, continue to perform step one; if the power supply is de-energized, the illumination of the three primary color LEDs is terminated, and waiting for power again;
  • the three primary color LEDs are locked to display the color before the power is lost, and during the lock display period, it is detected whether the power is lost again. If the power is not lost, the lock display is always performed; if the power is lost again , then terminate the lock display and wait for power again;
  • Step 4 After powering up again, repeat step 1 above.
  • the above-mentioned illuminating control method of the controllable LED illuminating device can realize the round-shift color display by judging the state of the power source (de-energized or electrified), and can also be at any time according to the user's request (the power source is controlled by the user) Lock to display a certain color.
  • 1 is a circuit diagram of a conventional color changeable LED lamp
  • FIG. 2 is a block diagram showing the electrical principle of the controllable LED lighting device of the present invention.
  • FIG. 4 is a circuit diagram of a first preferred embodiment in accordance with the inventive concept
  • Figure 5 is a flow chart of the operation of the controllable LED lighting device
  • FIG. 6 is a circuit diagram of a second preferred embodiment in accordance with the inventive concept
  • 7 is a circuit diagram of a third preferred embodiment in accordance with the inventive concept
  • Figure 8 is a circuit diagram of a fourth preferred embodiment in accordance with the teachings of the present invention.
  • Fig. 2 generally discloses the working principle of the controllable LED lighting device of the present invention.
  • the controllable LED lighting device comprises a power supply circuit 20, a control unit 21, a power failure detecting circuit 23, a reset circuit 24, and an LED driving circuit 25.
  • the three primary color LED arrays 22, which are LED illuminators, are connected to the power supply circuit 20 and the LED drive circuit 25, respectively, and the power supply circuit 20 receives an external power supply and supplies it to the circuit.
  • the voltage output lines 201, 202 of the power supply circuit 20 are respectively connected to the power input terminals of the control unit 21 and the LED array 22 (not shown in FIG. 2, which will be described in detail in FIG. 3) for providing the control unit 21 and the LED array 22.
  • the power failure detecting circuit 23 is disposed between the power supply circuit 20 and the control unit 21 for detecting whether or not the power supply circuit 20 is de-energized.
  • a reset circuit 24 is provided between the voltage output line 201 and the reset terminal of the control unit 21 (not shown in Fig. 2, which will be described in detail in Fig. 3), which reset circuit 24 can reset the control unit 21 under certain circumstances.
  • FIG. 3 discloses a relatively simple specific circuit structure. It should be emphasized that since the number of three primary color LEDs in the LED array is small (only one for each color), the driving output pin 10 of the single chip U1 is used. The output power of 11, 12, and 12 is sufficient to drive the LED, so no additional LED drive circuit 25 is required, and the case of using the drive circuit 25 will be described in detail in FIG.
  • the power supply circuit 20 in FIG. 3 uses a DC power supply DC (including a positive DC+ and a negative DC-) to supply power to the circuit.
  • DC power supply DC itself may be directly supplied by a dry battery or the like, or may be converted by an AC power supply;
  • the circuit 20 further includes an electrolytic capacitor C4 as an energy storage element (the connection mode and function of the electrolytic capacitor C4 will be described later in detail).
  • the LED array 22 includes LED1, LED5, and LED9 (the three LEDs emit light of three primary colors of red, green, and blue respectively).
  • LED1, LED5, and LED9 the three LEDs emit light of three primary colors of red, green, and blue respectively.
  • the number of LEDs of various colors included in the LED array 22 can also be According to the actual situation, this point will be reflected and described in the following text.
  • the control unit 21 can adopt a single-chip U1 similar to the 8051 architecture (such as the intestine T2005, 78P153, etc.), and the 1 pin of the single chip U1 is a potential detecting pin (hereinafter referred to as a potential detecting pin 1).
  • the triode Q1, the diode D2 and the resistors R2, R4 and R10 together form a power failure detecting circuit 23, wherein the collectors of the transistors Q1 are respectively connected to one ends of the potential detecting pins 1 and R4 of the single chip U1, and the other end of the resistor R4 is connected to the diode.
  • the cathode of the diode Q1 is connected to the anode DC+ of the DC power source DC through the resistor R10; the base and the emitter of the transistor Q1 are connected through the resistor R2, and the emitter of the transistor Q1 is simultaneously connected to the cathode of the DC power source DC DC -.
  • the anode of the diode D2 is connected to the near power terminal of the resistor R10 (ie, the resistor R10 is connected to the end of the DC+), and is connected to the positive DC+ of the DC power source DC, the cathode of the diode D2 is connected to the anode of the electrolytic capacitor C4, and the cathode of the electrolytic capacitor C4 is connected.
  • the negative DC-DC of the DC power supply DC is connected to the emitter of the transistor Q1 at the same time.
  • the electrolytic capacitor C4 can be charged by the DC power source DC and stores a certain amount of electric energy.
  • the microcontroller U1 shown in Figure 3 has a total of 18 pins.
  • other used pins include: reset pin 4, ground pin 5, power pin 14, clock pin 16 and Three drive output pins 10, 11, 12.
  • the reset pin 4 is connected to the negative terminal of the diode D2 through the pull-up resistor R5; the ground pin 5 is grounded; the power pin 14 is connected to the negative terminal of the diode D2; the resistor R3 and the capacitor C1 form an RC oscillator circuit, which passes through the clock pin.
  • 16 provides an RC oscillation clock for the single chip U1; the drive output pins 10, 11, and 12 respectively control the on or off of the LEDs LED9, LED5, and LED1.
  • Figure 3 shows the working principle of the circuit diagram as follows: When there is a sufficiently high DC voltage between DC+ and DC-, the transistor Q1 is turned on and provides a low level signal to the potential detection pin 1 of the single chip U1, indicating that the circuit is normally input to the DC power supply DC.
  • the LED array 22 controlled by the single chip U1 works normally (circular color change or lock a certain color, the initial state is cyclic color change, and the process of locking the color is described later).
  • the transistor Q1 is immediately turned off, and a high level signal is provided to the single chip U1, indicating The DC power supply DC in the circuit has been cut off. Due to the energy storage function of the electrolytic capacitor C4, the single chip U1 can continue to work in a short time. When it detects that the DC power supply DC has been cut off, all the LEDs in the LED array 22 will be immediately turned off, so that the circuit enters the power saving mode, the capacitor The stored energy of C4 can be maintained by the M1 for a sufficient time.
  • FIG. 3 shows a simple circuit of the controllable LED lighting device of the present invention.
  • FIG. 4 shows a specific circuit of a preferred embodiment, the main circuit structure and function of which are the same as in FIG. Adding some auxiliary components only from the perspective of optimizing the circuit and increasing the range of application of the circuit.
  • Figure 4 uses an AC power supply AC to increase the number of LEDs in each color of the LED array 22. As the number increases, the voltage required to drive the LED array is higher. The microcontroller U1 cannot directly withstand this voltage, so an LED driver is required. Circuit 25 (see FIG. 2), LED drive circuit 25 of FIG. 4 includes three transistors Q3, Q4, Q5 connected to three control pins 10, 11, 12 of the microcontroller U1 via resistors R8, R7, R6, respectively.
  • the single-chip U1 only provides switching signals for the switching transistors Q3, Q4, and Q5 (current limiting through the resistors R6, R7, and R8), and turns on and off the corresponding LEDs by the opening and closing of the transistors Q3, Q4, and Q5, R13, R14
  • the role of R15 is to limit current and equalize brightness.
  • AC1 and AC2 are connected to 220V AC power supply, and resistor R1 and capacitor C2 function as a step-down current limit.
  • Bridge rectification circuit BRG1 rectifies to obtain DC;
  • Capacitor C6 is a small capacity capacitor, which mainly acts as a filter.
  • the AC power supply AC is rectified to obtain the DC power supply DC as shown in Figure 3.
  • the rectified DC current flows through the diode D2, it is filtered and stabilized by the capacitor C3, the electrolytic capacitor C4 and the Zener diode Z1 to obtain a stable 13V DC voltage, and the 13V DC voltage is directly supplied to the common anode of the LED array 22.
  • each LED of each primary color is connected in series by 4 LEDs, and it takes about 12V to drive it to work normally.
  • Resistor R19 and Zener diode Z3 reduce the 13V power supply to about 5V for microcontroller U1.
  • Capacitor C7 filters the power supplied to the microcontroller U1 to improve the anti-interference ability.
  • Resistor R3 and capacitor C1 provide the RC oscillator clock for the microcontroller.
  • the resistors R5, R12, R16, the capacitor C5 and the transistor Q2 constitute a reset circuit 24.
  • the transistor Q2 When the voltage is high enough, the transistor Q2 is turned on, and provides a high level to the single chip U1. When the voltage is low, the transistor Q2 is turned off, and the transistor is turned off. U1 provides a low level, C5 acts as an anti-interference, and reset circuit 24 provides a more reliable reset for the microcontroller.
  • the transistor Q1, the diode D2, and the resistors R2, R10, and R4 constitute a power failure detecting circuit 23.
  • the bridge rectifier circuit BRG1 When the bridge rectifier circuit BRG1 is de-energized (for example, disconnecting its AC input), since the capacitance of the capacitor C6 is small, the diode D2 is added. The isolation function, the voltage across the capacitor C6 is rapidly reduced, the transistor Q1 is turned off, giving the microcontroller U1 a high level signal (when the voltage is high enough, Q2 is turned on, this signal is low). Since the electrolytic capacitor C4 has a large capacity, it can continue to the single chip U1 for a certain period of time after the power is lost. powered by.
  • the single chip U1 After detecting the lost power information provided by the transistor Q2, the single chip U1 immediately turns off all the LEDs in the LED array 22, enters the power saving mode, and changes the working mode (cycle color or lock a certain color), and then waits for the DC power supply DC power supply. After recovery, the LED array 22 is then allowed to operate in the changed mode.
  • Figure 4 is basically the same as that of Figure 3, except that the circuit is more optimized, and the use of AC power and the increase of illumination brightness are considered.
  • the illumination control method of the controllable LED lighting device of the present invention will be mainly described below with reference to the working flow chart given in FIG.
  • the LED lighting device After the user turns on the LED lighting device, the LED lighting device starts to work. It first performs an initial operation and then enters a normal working state.
  • the circuit performs the default rotation display color, gp, first performing step 51, displaying the next color (for example, red); then performing step 52, setting the delay (for example, setting the delay time) 3 seconds); During the delay time, step 53 is performed, and the power failure detecting circuit 23 detects whether the power is lost. If there is no power loss, step 54 is performed to determine whether the delay reaches three seconds, if the delay If it has not reached 3 seconds, step 53 is executed again. If the delay has reached 3 seconds, then return to step 51 to display the next color (for example, yellow).
  • step 55 is performed and the circuit enters the power saving mode (all LEDs in the LED array 22 are turned off, and only the microcontroller Ul is still operating).
  • step 56 the power failure detecting circuit 23 detects whether the power supply is restored. If the power supply is not restored, the loop 56 is continuously executed until the single chip U1 stops working. If the capacity of the electrolytic capacitor C4 is sufficiently large, the stored power is generally It can maintain the single-chip U1 for more than 5 seconds. Of course, the time for maintaining the operation of the single-chip U1 depends on the capacity of the electrolytic capacitor C4. Once the stored energy of the electrolytic capacitor C4 cannot maintain the operation of the single-chip U1, the single-chip U1 will be reset and stopped by the reset circuit 24. The next time the power is restored, it is still regarded as the first power-on operation. Execute step 51. If the detection result of the power supply has been restored before the operation of the microcontroller U1 is stopped, then step 57 is performed to lock the display. The current color (ie, the red color exemplified in step 51 before power loss).
  • step 58 is executed, and the power failure detecting circuit 23 detects whether the power is lost.
  • the power is supplied from the external power source (DC DC or AC AC).
  • the power supply time is completely determined by the user. If the user locks the current color. , keep the current color without disconnecting the power supply, then step 58 will Repeatedly. If the user needs to perform color rotation or lock other colors, then the power supply needs to be disconnected again.
  • the controllable LED lighting device performs step 59, enters the power saving mode, and waits for the power supply to be restored in step 510. If the power is restored again (either when the microcontroller U1 is working or after the work is stopped), then step 51 is executed again to start the color rotation. Of course, the user can still relock a certain color according to the above process.
  • the controllable LED light-emitting device of the present invention stores a certain amount of electric energy by using the electrolytic capacitor C4, and uses the power-down detecting circuit 23 to detect the state of the power source under the premise of isolation using the diode D2 (de-energization or Then, the display of the LED array 22 is controlled by the control unit 21, so that the LED lighting device can perform the round-change color display, and at the same time, it can lock and display a certain color according to the user's request at any time.
  • the illumination control method of the controllable LED illumination device of the present invention can be summarized into the following steps:
  • the three primary color LEDs are illuminated in the specified combination order, and the multi-color rotation display is presented;
  • the second step during the process of multi-color rotation display, it is detected whether the power supply is de-energized. If the power supply is not de-energized, continue to perform step one; if the power supply is de-energized, the illumination of the three primary color LEDs is terminated, and waiting for power again;
  • the three primary color LEDs are locked to display the color before the power is lost, and during the lock display period, it is detected whether the power is lost again. If the power is not lost, the lock display is always performed; if the power is lost again , then terminate the lock display and wait for power again;
  • Step 4 After powering up again, repeat step 1 above.
  • a step of determining the delay may be performed: if the delay exceeds a predetermined value (this predetermined value depends on the capacitance value of the electrolytic capacitor C4), the light emitting device Circuit reset; If the delay does not exceed the predetermined value, perform step 3. After the circuit is reset, if the circuit is powered up again, then step one is still performed.
  • the above-mentioned illuminating control method of the controllable LED illuminating device can realize the round-change color display by judging the state of the power source (de-energization or power-on), and can also be locked at any time according to the user's request (the power source is controlled by the user). Show a certain color.
  • the working mode of 21 can make the LED display a certain color (such as white) when it is first powered, and then perform the above operation according to the user's control of the power supply.
  • the circuit structures in Figs. 3 and 4 are only two specific embodiments of the controllable LED lighting device of the present invention, and the controllable LED lighting device of the present invention is not limited to the above embodiment.
  • the power failure detection circuit 23 can also be classified into two types.
  • the power failure detecting circuit 23 disclosed in FIG. 3 is a simple voltage detecting circuit
  • FIG. 6 shows the structure of another power failure detecting circuit 23a using a voltage detecting method (inside the broken line frame, including the resistors R20 and R21). , R22, R23 and electrolytic capacitor C9, voltage comparator U7-A).
  • the structure and function of the circuit other than the power failure detecting circuit 23a in Fig. 6 are basically the same as those in Fig. 3. Hereinafter, only the power failure detecting circuit 23a in Fig. 6 will be mainly described, and other parts will not be described.
  • the voltage comparator U7-A can also be an operational amplifier or replaced with a triode.
  • Resistors R20 and R21 are voltage sampling resistors. Their resistance must meet the following conditions: When the DC power supply DC is stable for a long time, the negative terminal voltage of U7-A is slightly higher than the positive terminal voltage of U7-A. Thus, U7-A outputs a high level during the voltage rise or stabilization period of the DC power supply DC. After power loss, since the negative terminal of U7-A has no storage capacitor, its voltage decreases with the decrease of DC voltage of DC power supply; but the positive terminal of U7-A is connected with energy storage electrolytic capacitor C9, and its voltage drops slowly.
  • the negative terminal voltage of U7-A will be slightly lower than the positive terminal voltage of U7-A.
  • U7-A outputs a low level, and the potential detection pin 1 of the single chip U1 can quickly detect the power loss.
  • the function of the power failure detecting circuit 23 shown in Fig. 3 is also achieved.
  • Fig. 7 discloses a power loss detecting circuit 23b (the inner portion of the broken line frame including the resistors 25, 26 and the transistor Q25) using the current detecting mode.
  • the structure and function of the circuit other than the power failure detecting circuit 23b in Fig. 7 are basically the same as those in Fig. 3.
  • the power failure detecting circuit 23b in Fig. 7 will be described in detail, and other parts will not be described.
  • Resistor R25 is a current sampling resistor and resistor R26 is a bias current limiting resistor.
  • Transistor Q25 is a switching transistor (can also be replaced by a voltage comparator or operational amplifier). When there is electricity, when a current flows through the resistor R25, there is a certain voltage difference across the resistor R25, so that the transistor Q25 is turned on and outputs a low level. After the power is lost, there will be no current flowing on the R25, so there is no voltage difference between the two ends, and the transistor Q25 turns off the output high level.
  • the potential detecting pin 1 of U1 detects a high level, indicating that the power has been lost. Therefore, the power failure detecting circuit 23b disclosed in FIG. 7 also reaches the power failure detecting circuit shown in FIG. 23 features.
  • FIG. 8 discloses another preferred circuit structure of the present invention, which is substantially the same as the circuit structure shown in FIG. 3 and FIG. 4, and the main difference is only: using the flip-flop U2 and the counter U3 instead of the single-chip U1 as the control unit 22, and The emitter of the shaping transistor Q21 is connected to the output of the flip-flop U2.
  • the control unit of this structure works as follows:
  • U2 is the trigger triggered by the rising edge. Trigger U2's pin 4 is connected to resistor R13 and capacitor C5 for the reset of flip-flop U2, ensuring that output pin 1 of flip-flop U2 is low when power is applied. This low level is sent to the emitter of transistor Q21, so that Q21 can work normally. The 50Hz square wave generated by transistor Q21 is sent to counter U3, and the output of counter U3 will change periodically to produce a cyclic color change effect.
  • the transistor Q1, the diode D2, and the resistors R2, R4, and R10 form a power failure detecting circuit 23.
  • the capacitor C6 is provided at both ends. The voltage drops rapidly, the transistor Q1 is turned off, and the high-level signal is output to the flip-flop U2 (the transistor Q1 is turned on when the voltage is high enough, the signal is low), the counter U3 is triggered on the rising edge, and the output pin 1 is inverted. Level.
  • circuit structure shown in FIG. 8 is compared with the prior art circuit structure shown in FIG. 1, it can be seen that the main improvement is that the flip-flop U2 is added (using the trigger U2 and the counter U3 to form the control unit together). ), power failure detecting circuit 23 (composed of resistors R2, R4, R10 and transistor Q1, diode D2), electrolytic capacitor C4 for energy storage, and the like. These differences also reflect substantial improvements and features of the present invention.
  • the power failure detecting circuit 23 of Fig. 8 can also employ the power failure detecting circuit 23a disclosed in Fig. 6 or the power loss detecting circuit 23b disclosed in Fig. 7.
  • the electrolytic capacitor C4 in the above embodiment is used as an energy storage element, and thus other forms of energy storage elements can be applied, and are not limited to electrolytic capacitors.
  • the reset circuit 24 can also be integrated in the control unit 23 (for example, the single chip U1), so that the control unit 23 itself can implement the reset function without an external auxiliary circuit, which is common in the art.
  • the practice is also a simple change that is easily conceivable by those skilled in the art. Equivalent transformations of various such as are intended to be included within the scope of the claims. Industrial applicability
  • the controllable LED lighting device of the invention stores a certain electric energy by using the energy storage component, and simultaneously detects the power failure and the power generation condition of the power source by using the power failure detecting circuit, and then controls the display of the LED by the control unit, thereby enabling the LED to emit light.
  • the device performs a round-turn color display, which also makes it possible to lock the display of a certain color.

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Abstract

L'invention concerne un appareil émetteur de lumière par LED commandable, comprenant : un circuit d'alimentation (20) ; un module de commande (21) relié au circuit d'alimentation (20) et destiné à commander une LED tricolore ; un élément accumulateur d'énergie électrique monté dans le circuit d'alimentation et transférant l'énergie électrique accumulée au module de commande (21) en cas de panne d'alimentation de l'appareil émetteur de lumière ; un circuit de détection (23) de panne d'alimentation monté entre le circuit d'alimentation (20) et le module de commande (21) et destiné à détecter l'état de marche ou l'état d'arrêt du circuit d'alimentation (20) et à transmettre un signal d'état au module de commande (21). L'invention concerne également un procédé de commande d'émission de lumière pour l'appareil émetteur de lumière par LED commandable, ledit procédé comprenant les étapes consistant à : en cas d'alimentation normale, amener initialement la LED tricolore à émettre de la lumière selon un ordre combiné prédéfini ; en cas de détection d'un panne d'alimentation au cours de l'émission multicolore alternée, interrompre l'émission de lumière par la LED tricolore et attendre le rétablissement de l'alimentation ; une fois l'alimentation rétablie, bloquer la LED tricolore sur la couleur émise juste avant la panne d'alimentation.
PCT/CN2007/070081 2006-06-09 2007-06-05 Appareil émetteur de lumière par led commandable et son procédé de commande d'émission de lumière WO2007143946A1 (fr)

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Application Number Priority Date Filing Date Title
CN200610035871.2 2006-06-09
CN2006100358712A CN1874634B (zh) 2006-06-09 2006-06-09 可控led发光装置及其发光控制方法

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WO2007143946A1 true WO2007143946A1 (fr) 2007-12-21

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WO (1) WO2007143946A1 (fr)

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