KR101737427B1 - An AC direct LED lamp apparatus having a step dimming circuit according to power on/off detection - Google Patents

Abstract

The present invention relates to an AC direct type LED lamp apparatus having a multi-stage dimming circuit in accordance with detection of power on/off. The AC direct type LED lamp apparatus of the present invention comprises: a power rectifier (10) rectifying power supplied by turning on a power switch; a power maintenance and distortion ratio improvement unit (20) connected to an output terminal in series, and changing a phase angle of the current by charging to remove a content of harmonics; a power switching detection unit (30) connected to the power maintenance and distortion ratio improvement unit (20) in series to detect the switching of the supplied power; a light emitting unit (50) connected to the power switching detection unit (30) and having a plurality of LEDs, which are turned on in accordance with a change in a rectified AC voltage, connected thereto in series or in parallel; and a dimming control unit (40) controlling the dimming state of the light emitting unit (50), wherein the dimming control unit includes one component (IC) embedded in a general semiconductor package and a plurality of resistors setting a rate of the dimming control by step. Therefore, a dimming function is able to be implemented by the power switch without a separate dimming apparatus or circuit.

Description

[0001] The present invention relates to an AC direct LED lamp apparatus having a multi-step dimming circuit for power on / off detection,

[0001] The present invention relates to an AC direct lighting type LED lighting apparatus having a dimming circuit according to power on / off detection. More particularly, the present invention relates to an AC direct lighting type LED lighting apparatus for counting power on / off functions within a predetermined time, An AC direct type LED having a dimming circuit according to power ON / OFF detection capable of dimming without setting a low power line communication or a setting circuit for generating a dimming condition by counting the number of power ON / And an illumination lamp apparatus.

Conventionally, incandescent lamps and fluorescent lamps were mainly used as illumination devices. However, incandescent lamps and fluorescent lamps consume much power compared to lighting efficiency. In addition, since fluorescent lamps are manufactured using mercury and the lamp life is short, they must be replaced frequently. Due to these problems, environmental regulations have been strengthened around the world, for example, in recent years, a ban on the manufacture of incandescent lamps and fluorescent lamps has been confirmed in some countries.

In recent years, LED (Light Emitting Diode) has been attracting attention as energy saving and green environment as an important issue, and LED lamps are increasingly attached to homes, factories and roads. In the case of this LED lamp, there are simple aspects such as control of power saving and illumination, but in recent years, LED lamp has been developed with the desire to improve brightness and color temperature of LED There is an increasing demand for a dimmig function that sequentially controls light brightness, and studies on the development of circuits related to this dimming control are underway.

The circuit for the dimming control is divided into an internal type and an external type. The external type has already been patented. However, the development of a built-in circuit integrated with the converter is relatively expensive, The problem of cost is rising and it is urgent to study the simple design method.

Therefore, in order to control the brightness of the LED, an auxiliary power supply circuit that is configured independently of the control unit is required, and since the current for driving the constant current is required for the signal change, the additional circuit is complicated. In addition, the power saving effect is reduced due to the degradation of the efficiency of the LED luminaire due to the current consumption of the controller. A separate controller or digital dimmer position such as a remote controller due to communication relationship between the controller and the main species, a triac phase variable dimmer device Etc., the consumer must pay for the purchase or installation of additional equipment.

In the case of using a triac dimmer device, a passive element for preventing malfunction of the triac during light load must be configured in the LED control circuit, thereby reducing circuit conversion efficiency, resistance of power factor compensation characteristics, generation of power supply noise And besides, since all the triac dimmer devices do not exhibit the same characteristics, the dimming characteristics of the devices behave differently.

One example of the technique for solving such a problem is described in Documents 1 and 2 below.

For example, the following Patent Document 1 discloses a method of controlling the output brightness of a light source according to (a) whether or not a power-on signal is transmitted, (B) if the power off signal is delivered within a predetermined time as a result of the determination in the step (a), the output brightness change controller transmits a power off signal, (C) checking the currently set output brightness according to the 'output brightness change signal' recognized by the output brightness changing controller in step (b); (d) The change control unit generates a 'change control signal' from the currently set output brightness to the next output brightness, and transmits the generated 'change control signal' to the LED control unit; and (e) Controlling an output of the LED by changing the currently set output brightness to the next output brightness when the next power on signal is transmitted based on the control signal, A control method is disclosed.

Patent Document 2 discloses on / off detection means for detecting the on / off state of a light switch, and on / off state information of the light switch from the on / off detection means to determine a snapping operation of the light switch A dimming adjusting means for adjusting the illuminance of the LED lamp when the dimming signal is inputted from the dimming determining means, a power holding means for supplying driving power to the LED lamp during the snapping operation of the lighting switch, A control device for an LED lamp including a circuit part is disclosed.

In addition, since the conventional AC direct-coupled LED driving circuit technology operates only by the serial configuration of the LED load, when the LED element is partially damaged due to electrical disturbance, the LED lamp is turned off. In addition, a dimming function for power saving is not provided or a dimming function is required for a dimming function.

Korean Registered Patent No. 10-1318271 (Registered October 10, 2013) Korean Registered Patent No. 10-0970613 (Registered on July 7, 2010)

However, in the conventional technique as described above, the complexity of the structure required for storing the command value of the dimming ratio when the power ON / OFF operation is detected in the memory element and the means for reading the command value, It is necessary to add additional circuit such as noise blocking, which causes cost increase factor, cost increase factor of dimming luminaire and cause of trouble.

In particular, in a direct lighting type lamp, a circuit condition is required to constitute a circuit which does not use the configuration of a converter or the like as much as possible. In this case, a memory device storing a table lighted condition in a dimming control circuit using power on / A separate stabilized power supply circuit is required in the power supply circuit design of the lighting apparatus, which causes a rise in cost and a cause of failure.

In addition, the light control device or the like is illuminated only by a step set by a dimming ratio of a table stored in a nonvolatile memory or the like, which detects the number of power on / It is troublesome to change the light condition table of the memory through a separate input / output terminal for changing the table of the memory and a separate device for the read-out of the memory is required, And the need for a professional manpower to operate it. As a measure requiring modification of the mask design to change the setting conditions of the integrated memory integrated in another scheme, the redevelopment process of the integrated circuit must be performed.

 In addition, in the conventional AC direct-coupled LED circuit as described above, a structure of a circuit in which a separate dimming circuit is connected for dimming is required. Since a plurality of LED units are connected in series, And it operates in a structure in which it is turned on for each unit, so that a deviation between taps occurs and it is difficult to control uniformly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a lighting control apparatus and a lighting control method thereof, The dimming according to the power on / off detection which can provide a simple dimming condition change by executing the dimming condition of the various modes of at least one (at least 1 to at most n) cases by resistance change or by rotating only the knob of the variable resistance element And an AC direct lighting type LED lighting device having a circuit.

Another object of the present invention is to provide a lighting device capable of minimizing the occurrence of deviation between LED units because LED units are independently connected to a plurality of output terminals, And a dimming circuit according to the present invention.

It is a further object of the present invention to provide a power on / off control method capable of realizing various lighting functions by connecting LED units having different color temperatures or different color wavelengths, And an AC direct lighting type illumination lamp apparatus having a dimming circuit according to off-detection.

In order to achieve the above object, an LED illumination device according to the present invention is an AC direct lighting LED lighting device having a dimming circuit according to power on / off detection. The device includes a power rectification part (10) for rectifying a power supplied by turning on a power switch A power supply maintaining and distortion improving unit 20 connected in series to the output terminal of the power rectifying unit to change the phase angle of the alternating current by charging according to the fluctuation of the rectified AC voltage to remove the current harmonic content rate, A power switching detection unit 30 for detecting the switching of a power supply connected in series to the improvement unit 20, a plurality of LEDs 30 connected to the power switching detection unit 30 for lighting according to the fluctuation of the rectified AC voltage, A light emitting unit 50 connected in series or in parallel and a light control unit 40 for controlling the light emitting state of the light emitting unit 50. The light control unit includes a general- It characterized in that it comprises a single component (IC) and a plurality of resistors and capacitors for setting the step ratio of the dimming control built into the package.

In addition, in the LED illumination device according to the present invention, the dimming control unit 40 includes a step dimming unit 410 having the resistor and a dimming LED driver 420 for driving the dimming state of the LED, The dimming LED driving unit 420 includes a sawtooth wave generating circuit 421, a comparator 421, a comparator 421, a comparator 422, and a comparator 424. The dimming control unit 40 includes a first resistor R7 and a second resistor R8, And a PWM generating circuit and a gate driving circuit (422) having a switching element (U2).

The step dimming unit 410 may be connected to the power switching detection unit 30 and may be a binary binary counter according to the value detected by the power switching detection unit 30 when the power is turned on, A dimming step selector 413 for outputting a dimming mode selection signal to the comparator in accordance with binary binary output values of the counter and the low voltage detection reset circuit 414, a counter for performing a reset and a low voltage detection reset circuit 414, And dimming value output units 4121, 4122 and 4123 for each of the divided voltage resistors, each of which has a resistor voltage divider circuit for generating a reference voltage for setting three dimming modes, A dimming group selection unit 412 for each mode, a dimming group selection unit 412 for outputting the dimming value for each of the voltage dividing resistors in the dimming value output units 4121, 4122, and 4123 for each of the voltage dividing resistors to the dimming step selecting unit 413, (412) In that it comprises a dimming mode selection unit 411 outputs the features.

The dimming mode selection unit 411 may include a dimming selection unit 4111 having the first resistor R7 and the second resistor R8, the user dimming selection unit 4111 having the first resistor R7 and the second resistor R8, A user dimming selection comparator 4112 having first to third comparators U5, U7 and U8 which are connected to the first to fourth comparators 4111 and 4111 and which can select three modes, And a user dimming selection logic unit 4113 configured to output the channel selection signal.

In the LED illumination device according to the present invention, the first to third comparators U5, U7, and U8 are respectively connected to the first resistor R7 and the second resistor R8, VDD * 1/2 [V] and VDD * 3/4 [V], which are set to VDD * 1/4 [V].

As described above, according to the AC direct lighting type illumination apparatus having a dimming circuit according to the present invention, a logic circuit and a current control circuit, which operate in a dimming function, So that the manufacturing process can be simplified.

Further, according to the AC direct lighting type illumination lamp apparatus having a dimming circuit according to the power on / off detection according to the present invention, since two resistors are connected in series or in parallel to the current control terminal, Since the circuit can be constructed by connecting the LEDs, it is possible to maintain the lighting function when the LEDs are generated.

In addition, according to the AC direct lighting type illumination apparatus having the dimming circuit according to the present invention, the dimming function control unit sets the dimming step during the time delay between the turn-on and the turn- Since the dimming function is implemented by the power switch without a separate dimming control device or circuit and the dimming step brightness setting is determined by the proportion of the value of the external resistor, Since the circuit can be designed and modified freely when initializing, adjusting, or changing the value, it is also possible to simplify the cost improvement of the normal manufacturing process and simplify the structure of the illumination lamp apparatus.

1 is a block diagram of an AC direct lighting type LED lighting apparatus having a dimming circuit according to the present invention,
Fig. 2 is an IC internal block diagram of the dimming control unit shown in Fig. 1,
FIG. 3 is a circuit diagram of an AC direct lighting type LED lighting apparatus having a dimming circuit according to the power on / off detection according to the present invention,
4 is a view for explaining the operation of the sawtooth wave generating circuit shown in Fig. 3,
5 is a circuit diagram of the power on / off detection and counter shown in FIG. 3,
FIG. 6 is a timing chart in the power on / off detection shown in FIG. 5,
7 to 9 are circuit diagrams showing examples of use of the circuit configuration,
10 to 18 are views showing photographs in which an AC direct lighting type illumination lamp apparatus having a dimming circuit according to the power on / off detection according to the present invention is applied.

These and other objects and novel features of the present invention will become more apparent from the description of the present specification and the accompanying drawings.

First, the basic concept of the present invention will be described.

The LED illumination device according to the present invention uses a power supply voltage detection circuit composed of a resistor and a capacitor to detect the number of times the power supply voltage is interrupted, and when the power is turned on within a predetermined time determined by the resistance and the time constant of charging and discharging the capacitor / Off, the number of times of power on / off is counted by detecting the voltage magnitude at this time, and the first dimming condition is divided into three stages according to the monitoring frequency, and the dimming condition is divided into three stages again in each step And a divided resistance proportion detector for determining the ratio of the operating voltage so as to be dimmed.

In order to simplify the explanation, the present invention will be described mainly with reference to a dimming device illuminated in nine steps. However, for convenience of explanation, the dimming mode selection unit of the dimming mode selection unit, the user dimming selection logic unit, The number of logical units, and the number of the first, second and third output units according to the divided voltage.

Hereinafter, the configuration of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an AC direct lighting type illumination lamp apparatus having a dimming circuit according to the present invention. FIG. 2 is an internal block diagram of an IC of the dimming control unit shown in FIG. 1, 1 is a circuit diagram of an AC direct lighting type illumination lamp apparatus having a dimming circuit according to the power on / off detection according to the present invention.

The LED illumination device according to the present invention is an AC direct lighting LED illumination device having a dimming circuit according to power ON / OFF detection. As shown in FIGS. 1 and 3, the power supplied by ON- A power supply rectifying section 10 connected in series to the output terminal of the power rectifying section 10 for changing the phase angle of the alternating current by charging in accordance with the fluctuation of the rectified alternating voltage, A power switching detection unit 30 for detecting the switching of a power supply connected in series to the power supply maintenance and distortion improving unit 20 and a switching control unit 30 connected to the power switching detection unit 30, A light emitting unit 50 connected in series or in parallel with a plurality of LEDs that are turned on in accordance with the variation, and a light control unit 40 for controlling the light emitting state of the light emitting unit 50.

1, the power supply rectifying unit 10 may include an AC power source and a bridge rectifier. The power supply maintaining and distortion improving unit 20 may include a diode connected to an output terminal of the bridge rectifier, And a capacitor and a resistor connected in parallel to the diode.

The power switching detection unit 30 includes a resistor connected in series to an output terminal of the bridge rectifier, a capacitor and a diode connected in parallel to the resistor, and a switch (not shown) for controlling the power supply for supplying the AC power is turned on And detects on / off within the predetermined number of times within a predetermined time.

As shown in FIG. 2, the dimming control unit 40 may include a single integrated circuit (IC) incorporated in a general-purpose semiconductor package. The IC includes a low-noise power regulator (LDO) And a power supply maintaining and distortion improving unit 20 having a power supply unit (not shown). The power supply during the off period of the power switch is maintained by the charging power of the capacitor C1 of the LDO of the power supply maintaining and distortion improving unit 20 as shown in FIG. And all counted switching on / off counts of the counter unit are also reset.

1, the dimming control unit 40 includes a step dimming unit 410 having a plurality of resistors for setting a step-by-step ratio of dimming control, and a dimming LED driving unit 420 for driving a light dimming state of the LEDs ).

The resistor may comprise a first resistor R7 and a second resistor R8 as shown in FIG. 3 and may be provided outside the luminaire to control the dimming mode by the user. The first resistor R7 and the second resistor R8 may be provided in a structure that changes the structure of the variable resistor or the size of the fixed resistor.

3, the step dimming unit 410 includes a dimming mode selection unit 411, a dimming group selection unit 412 for each mode, a dimming step selection unit 413, a counter and a low voltage detection reset circuit 414 ).

The dimming mode selector 411 outputs a channel selection signal to the dimming group selector 412 for each mode, and the dimming group selector 412 for each mode generates a reference voltage for setting three dimming modes (4121, 4122, and 4123) for each of the first to third voltage dividing resistors, and the first to third voltage dividing resistors (4121, 4122, and 4123) To the dimming step selection unit 413. The dimming step selection unit 413 selects the dimming value for each of the voltage dividing resistors in the first and second embodiments.

The dimming step selector 413 outputs a dimming mode selection signal to the comparator U2 in accordance with the binary binary output value of the counter and the low voltage detection reset circuit 414 and outputs the dimming mode selection signal to the counter and low voltage detection reset circuit 414 Is connected to the power switching detection unit 30 and executes a binary binary counter and a reset in accordance with the value sensed by the power switching detection unit 30 when the power is turned on.

3, the dimming mode selection unit 411 includes a user dimming selection unit 4111 having the first resistor R7 and the second resistor R8, the user dimming selection unit 4111, A user dimming selection comparator 4112 having first to third comparators U5, U7 and U8 which can select three modes, and a comparator 4112 for calculating a logic level 'H' And a user dimming selection logic unit 4113 which is composed of a logic circuit and outputs the channel selection signal.

3, the dimming LED driving unit 420 includes a sawtooth wave generating circuit 421, a PWM generating circuit having a comparator U2, and a gate driving circuit 422.

Next, the operation of the present invention will be described in detail with reference to Fig. 3 and Figs. 4 to 6. Fig. FIG. 5 is a circuit diagram of the power on / off detection and counter shown in FIG. 3, and FIG. 6 is a circuit diagram of the power on / off control circuit shown in FIG. Off < / RTI > detection.

The LED illumination device according to the present invention includes an AC direct drive-based serial or parallel-connected LED illumination circuit that can be driven directly by an AC voltage and can be implemented in a general semiconductor process.

When the power is turned on, the power supply signal is detected by the resistance partial pressure of the power switching detection unit 30 connected to the terminal J5 shown in FIG. 3, and the voltage is increased while being charged. In addition, the constant voltage and current source necessary for the IC to operate are operated by a low noise power supply circuit (LDO regulator) of the power supply maintaining and distortion improving unit 20 constructed therein. The external capacitor C1 connected to the terminal J4 charges the current which can be driven by the IC for a certain period of time and is supplied for a minimum period of time (for example, a period of about 3 seconds) between the power signal ON / And is used to supply an operation holding current. The value of the capacitor C1 connected to the terminal J4 is determined by the time constant and is about 22 uF to 47 uF.

When the reference voltage (for example, 9V) is exceeded by the comparator U10 of the counter and the low voltage detection reset circuit 414, a power on signal is applied to the clock terminals of U13A and U13B to operate the binary binary counter circuit. The output signals S0 and S1 of U13A and U13B are connected to the selection circuit of U12 of the dimming step selection unit 413. [ U12 is composed of an integrated circuit and an equivalent circuit that performs channel selection function of 4 channel input 1 channel output and selects among 4 channels (X0 ~ X3 (1)) according to binary binary input of selection signals A and B (pin numbers 10 and 9 of U12) , And one signal of the pin number 12, 14, 15, 11 of U12 is connected to the output channel (U12 pin number 13, X). For example, if the selection signals A and B are 00, X0 channel is X output, 01 is X1 channel is X output, 10 is X2 channel is X output, X3 channel is 11 X output. (For example, 80%), which is a dimming control signal, for example, 100%, 80%, and 80% of the dimming control signals for the X0, X1, X2, -65%), Midium-Level (for example, 50-30%), and Low-Level (for example, 25-5%).

The X output of the U12 of the dimming step selector 413 output by the counting value is input to the inverting terminal of the comparator U2 in the PWM generating circuit and the gate driving circuit 422 and is input to the sawtooth wave generating circuit 421 and the output of which the width of the pulse is varied by the comparison function is connected to the gate of the switching element of the transistor Q5 in the PWM generating circuit and the gate driving circuit 422 and is connected to the output terminal The current of the LED circuit is controlled.

On the other hand, the comparator U11 of the counter and low-voltage detection reset circuit 414 is a circuit for detecting a low voltage (for example, 5 V or less), and the power is turned off and maintained for a predetermined time When the reset voltage drops below, or when the input power source is turned off and recharged in a turned-on state, a reset signal is generated and the counter signal is initialized to 00. In this case, the comparator U12 of the dimming step selector 413 outputs the input signal of X0 to the X channel and is inputted to the comparator U2 of the PWM to be connected to the gate signal of the switching element of the constant current source to control the current.

Terminals J2 and J3 can be connected to external resistors (R7, R8) to control the dimming mode. This is because the conventional IC can not change the dimming stage during design and production so that it can not be changed in the actual application circuit. In contrast, the dimming mode in which the number of the n types of the dimming stage can be selectively changed is selected And it is possible to obtain a merit that the design cost and the production cost can be reduced by not using the nonvolatile memory.

The first through third comparators U5, U7 and U8 of the user dimming selection comparator 4112 operate as comparators capable of selecting three modes, and the reference voltages are set differently for the respective non-inverting terminals. The reference voltage of the comparator U7 is VDD * 1/4 [V], the reference voltage of the comparator U5 is VDD * 1/2 [V], the reference voltage of the comparator U8 Can be set to VDD * 3/4 [V], and A, B, and C can be set to 0, 0, 0, or 0 as compared with the input voltage applied by the divided voltage of the first resistor and the second resistor 0,1,1 or 0,1,1 or 1,1,1. When the divided signal VTH78 of the first resistor and the second resistor R7 and R8 is higher than VDD * 1/4 [V], 111 indicates VTH78 and VDD * 1/4 [V] < VTH78 <VDD * V] is 100, VDD * 3/4 [V] < VTH78 is displayed when the voltage is between 110 and VDD * 1 / 2V [V] <VTH78 <VDD * 3/4 [V].

The U19, U20, and U21 provided in the dimming value output units 4121, 4122, and 4123 of the first to third voltage dividing resistors of the mode-dependent dimming group selection unit 412 select eight channel inputs, And is equivalent to an integrated circuit of a channel selection function that selectively connects to a channel.

When the logic circuits of U28, U29 and U30 provided in the dimming mode selection section 411 are connected to the channel selection signals (9, 10 and 11 pins) of U19, U20 and U21, the signals of the modes 0, And logic level &quot; H &quot; occurs only once.

The logic circuit provided in the dimming mode selection section 411 is intuitively known by comparing the right side and right side values of the truth table of the logic circuit in the following Table 1. It is a logic circuit added for the clarity of the signal, , The logic circuit can be eliminated. In this case, it is possible to change the mapping to the input channels of U19, U20, U21 (the pin number connecting to the input signal and the wiring method matching the channel selection number).

Input signal of U7 MODE0 MODE1 MODE2 A B C A & B & C (NOT A) & B & C (NOT A) & (NOT B) & C 0 0 0 0 0 0 0 0 One 0 0 One 0 One 0 0 0 0 0 One One 0 One 0 One 0 0 0 0 0 One 0 One 0 0 0 One One 0 0 0 0 One One One One 0 0

That is, the first and second resistors R7 and R8 applied to the terminals J2 and J3 are constituted by a resistor circuit for generating a reference voltage for determining a dimming mode, and a reference voltage circuit provided therein and a voltage To determine the dimming mode. The selected signal is selected by the channel selector.

In Fig. 3, a selection circuit of n = 3 stages is presented, and a detailed reference voltage ratio is generated by the value of the resistor connected to the channel of the selector.

U20, U20 and U30 in the mode-dependent dimming group selection unit 412 when the mode is 0 (low-level dimming mode) according to the logic operation values of the logic circuit truth tables of U28 to U30 in the dimming mode selection unit 411, U21, U20 and U21 are 010 and MODE 2 (high-level dimming mode), the values applied to channel selection of U21 are 100 and MODE 1 (intermediate level dimming mode) , The value applied to the channel selection of U19, U20 and U21 is 001. When MODE is 0, the input channel X1 of U19, U20 and U21 is connected to the output X, and when MODE 1, the input of U19, U20 and U21 Channel X3 is connected to output X, and when MODE 2, input channel X5 of U19, U20, U21 is connected to output X.

In the dimming group selection unit 412 for each mode, eight input channel signals U19, U20 and U21 are connected to a resistor voltage divider circuit for generating a reference voltage for setting three dimming modes, and X1, X3 and X5 A voltage circuit corresponding to A mode, B mode, and C mode is connected. For example, U19 is configured to select a voltage corresponding to a high-level dimming signal. In the A mode, a signal of VDD * 0.8 [V] is input to the input channel X1, and when the mode is B, VDD * 0.75 [V] A signal of VDD * 0.65 [V] in the C mode is connected to the channel signal X3, and a signal of VDD * 0.65 [V] is connected to the input channel signal X5.

In the mode-specific dimming group selection unit 412, a voltage corresponding to the intermediate level dimming signal is selected in U20. In the A mode, a signal of VDD * 0.5 [V] is input to the input channel X1, * 0.4 [V] is connected to input channel signal X3, and when C mode, a signal of VDD * 0.3 [V] is connected to input channel signal X5. The dimming group selection unit 412 selects the voltage corresponding to the low level dimming signal in U21. In the A mode, a signal of VDD * 0.25 [V] is input to the input channel X1, and a signal of VDD * 0.20 [V] is connected to input channel signal X3, and when C mode, a signal of VDD * 0.05 [V] is connected to input channel signal X5.

(Low) level in the input channel selected in accordance with the mode selection signal of MODE 0, MODE 1 and MODE 2 are input to the X1, X2, and X3, and the value of the highest level (VDD) referred to at the time of reset is connected to the input channel. It is connected to the X output channel of U12 according to the value of the counter.

The above example is for setting the dimming group to three, and combinations of N (where N = 1 to infinity of a natural number) can be configured in parallel if necessary.

4, the sawtooth wave generating circuit 421, the PWM generating circuit, and the gate driving circuit 422 in the LED illumination apparatus according to the present invention automatically start oscillation and output a sawtooth signal when the power is turned on . When the output waveform of the sawtooth wave oscillator is input to a comparator that compares the two signal amplitudes of the input signal, a PWM wave is output at the time of comparison. The output current (I1) of the current mirror shown in Figure 3 is determined by the resistance Rt. The current mirror circuit operates so that I1 = I2. The capacitor Cr is charged at I2. The comparator detects the voltage across Cr, and if it becomes the specified value, Q1 turns on and discharges. When this operation is repeated, a sawtooth wave is outputted at both ends of Cr. The oscillation frequency is determined by the current value by the resistance value of Rt and the charging time constant by the capacitance of Cr. When the external reference voltage (dimming step signal) is applied to another terminal of the comparator, a signal whose width is varied by a comparator operation is obtained according to the applied reference voltage have.

Next, the characteristics of the counter and low-voltage detection reset circuit 414 will be described with reference to Figs. 5 and 6. Fig.

When the AC voltage is not detected at the Vin pin terminal for a time period of ms set in the time delay circuit and more than a predetermined delay holding time (for example, 3 seconds) is delayed, the comparator of the counter and the low voltage detection reset circuit 414 The output is turned off, and the counter is reset. The delay hold time is determined by the capacity of the external charge circuit capacitor connected to the internal power supply signal VDD.

When the AC voltage is restarted and the measured voltage of the comparator is normally maintained, the comparator is turned on to supply the clock to the counter register, and the output value of the counter is changed to a new value. The dimming control ratio (reference voltage corresponding to the ratio) is selected, which is a reference voltage corresponding to the selected channel of the counter, and is applied to the reference voltage of the PWM signal generator. And changes the current setting value applied to the constant current source according to the PWM output signal.

When the power on / off signal is generated within a predetermined time delay, the internal counter value is maintained by the charging circuit, and the counter value is newly updated by the restarted on / off signal, The brightness is controlled according to the value. That is, the three-step dimming interval has a value of 0 -> 1 -> 2, and the dimming setting standard can be changed by the selected mode.

As described above, the first and second resistors R7 and R8 applied to the terminals J2 and J3 in the LED lighting apparatus according to the present invention are constituted by a resistor circuit for generating a reference voltage for determining the dimming mode, And determines a dimming mode by comparing an externally applied voltage. The selected signal is selected by the channel selector. In Fig. 3, a selection circuit of n = 3 stages is presented, and a detailed reference voltage ratio is generated by the value of the resistor connected to the channel of the selector.

The three channel selectors are divided into groups of dimming steps (for example, 65-80%), middle (for example, 30-50%) and down (for example, 5-25%), The value is selected according to the mode.

The counter values S0 and S1 output from the counter unit by the power on / off detection are binary binary format, and are applied to the selection signal of the channel selector of U12 by the dimming step selector 413, Lt; / RTI &gt; That is, X0 is a 100% dimming output, and X1, X2, and X3 are reference voltage signals of a dimming output corresponding to one, middle, and one of the dimming modes. The output X signal is applied to the PWM generator circuit and the comparator u2 of the gate drive circuit 422. [

In the present invention, elements such as U1, U2, U27A, U24A, U29, U19, U20, U21, U12, U13A and U13 are IC equivalent circuits and are available from ON Semidonductor, Texas Instrument And the like, and a function equivalent to that of a commercialized device. In the present invention, a known device having a function equal to or greater than that of the known device can be used, and a detailed description thereof will be omitted.

Next, an exemplary circuit configuration of an LED illumination lamp according to the present invention will be described with reference to FIGS. 7 to 9. FIG.

7 to 9 are circuit diagrams showing examples of use of the circuit configuration. 7 shows a circuit in which output terminals are connected in parallel, FIG. 8 shows a circuit in which output terminals are connected to respective LED serial circuits, and FIG. 9 shows a circuit in which two circuits are connected in parallel to form four LED circuits And shows the configured state.

Meanwhile, the LED illumination device according to the present invention may be applied to all LED illumination devices and LED illumination devices, for example, an LED illumination device as shown in FIGS. 10 to 17.

That is, the LED light fixture according to the present invention can be used as an LED light fixture such as an LED straightening part, an LED anti-vibration proof LED, an MR16 lamp, an LED runner type / Such as LED spotlights, LED spotlights, double end LED lamps, LED stop lamps, LED blackboards, LED fog lamps, converter external LED lamps, LED lamps, LED guidance lamps, LED lamps, LED lamps, LED FPL lamps, LED standby lamps, LED living rooms, LED power poles, etc., LED lamps, etc.), LED kitchen lights, LED walking lights, FPL LED lighting fixtures, LED spotlights, LED bath lights, LED security lamps, LED fluorescent lighting fixtures, LED wind direction, etc. LED round light, etc. LED street light, LED flat light, LED signal light, LED sensor, LED floodlight, embedded type and fixed type LED LED lightings, LED lightings, LED lights, LED lights, LED lights, LED lights, LED lights, LED lighting fixtures, LED lighting fixtures, LED lighting fixtures, LED bulb etc. (E12, 14, 17, 26, 39 base type), LED underwater light, LED turning light, LED surface light (edge, direct light), LED pick-up light, LED runway guide light, LED runway end identification, LED down light, LED solar-wind street light, LED runway light, LED multi-down light, LED solar road guide light, LED runway center line, LED parking lot, LED high ceiling light, LED runway street Etc., LED nameplate for road nameplate, LED signage for road signage.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

The use of the AC direct lighting type illumination lamp apparatus having the dimming circuit according to the power on / off detection according to the present invention can reduce the cost and energy of the LED illumination lamp apparatus.

10: Power input part
20: Power supply maintenance and distortion improving unit
30: Power switching detection unit
40: dimming control unit
50:

Claims (4)

An AC direct lighting type lighting fixture having a dimming circuit according to power on / off detection,
A power rectifying unit 10 for rectifying the power supplied by turning on the power switch,
A power supply maintaining and distortion improving unit 20 connected in series to an output terminal of the power rectifying unit,
A power switching detection unit 30 for detecting switching of a power supply connected in series to the power supply maintenance and distortion improving unit 20,
A light emitting unit 50 connected to the power switching sensing unit 30 and connected in series or in parallel to a plurality of LEDs connected to the power rectifying unit,
And a dimming control unit (40) for controlling a light emitting state of the light emitting unit (50)
The dimming control unit 40 includes a plurality of resistors for setting a step-by-step ratio of dimming control, a step dimming unit 410 having the resistors, and a dimming LED driver 420 for driving the dimming state of the LEDs, The resistor comprises a first resistor (R7) and a second resistor (R8)
The dimming LED driver 420 constitutes a PWM generating circuit and a gate driving circuit 422 having a sawtooth wave generating circuit 421, a comparator U2,
The step dimming unit 410 is connected to the power switching detection unit 30 and includes a counter for performing a binary binary counter and a reset according to a value sensed by the power switching detection unit 30 when the power is turned on and a low- A dimming step selector 413 for outputting a dimming mode selection signal to the comparator U2 according to the binary binary output values of the counter 414 and the low voltage detection reset circuit 414, (4121, 4122, and 4123) for each of the first to third voltage dividing resistors, each of which has a resistor voltage divider circuit for generating a reference voltage to be applied to each of the first to third voltage dividing resistors, A dimming group selection unit 412 for outputting the dimming value for each of the voltage dividing resistors 4121, 4122 and 4123 to the dimming step selector 413, A dimming mode selection unit 411 An AC direct type LED lighting apparatus having a dimming circuit according to the multi-level box on / off power detected, characterized in that a. delete delete The method of claim 1,
The dimming mode selection unit 411
A user dimming selector 4111 having the first resistor R7 and the second resistor R8,
A user dimming selection comparator 4112 connected to the user dimming selector 4111 and having first to third comparators U5, U7 and U8 for selecting three modes,
And a user dimming selection logic unit 4113 configured to perform logic operation for encoding the dimming selection signal to the corresponding channel and outputting the channel selection signal,
The first to third comparators U5, U7 and U8 operate by the partial pressure of the first resistor R7 and the second resistor R8, respectively, in order to generate a signal for determining the dimming mode selection signal And a dimming mode selection signal is outputted in comparison with a plurality of reference voltages set as a reference voltage and an applied voltage by the first resistor and the second resistor. The multi-stage dimming circuit according to the power on / AC direct lighting type LED light fixture equipped.

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