Multi-stage LED dimming module

The authors of the patent

H05B33/08 - Circuit arrangements not adapted to a particular application

The owners of the patent US9445473:

Rhine Electronics Co Ltd

 

A multi-stage LED dimming module includes a voltage source and an LED control module having a dual-link pull switch, a substrate, a control circuit and a multiple of LED light sources, and the control circuit further includes a rectifier/filter circuit unit, a resistor array unit and a control circuit unit, and the voltage source is electrically connected to the LED control module for controlling the brightness of the LED control module, so as to achieve the effects of providing a convenient application and a stable structure.

 

 

The current application claims a foreign priority to application number 105200183 filed on Jan. 7, 2016 in Taiwan.
FIELD OF THE INVENTION
The present invention relates to a multi-stage LED dimming module, and more particularly to the multi-stage LED dimming module for dimming an LED light source by a dual-link pull switch.
BACKGROUND OF THE INVENTION
With reference to FIG. 13 for a conventional LED light source module 30, the LED light source module 30 is connected to a switch (not shown in the figure) or a power source 32 through a conductive wire 31, and the switch is selectively switched to ON/OFF to control the brightness of the LED light source module 30, but cannot be used for a diversified dimming control, and another conventional LED dimming module 30 controls the dimming effect by discharging power naturally by a capacitor, and when the switch is set to an OFF state, the capacitor supplies electric power to a flip flop (not shown in the figure) to control the brightness. However, the aforementioned structure has the issue of unstable operating status and inaccurate dimming effect, and thus requires further improvements.
SUMMARY OF THE INVENTION
In view of the aforementioned problems of the conventional LED light source module has the inconvenient and unstable structure, it is a primary objective of the present invention to overcome the aforementioned problems by providing a multi-stage LED dimming module to overcome the problems of the prior art.
To achieve the aforementioned objective, the present invention provides a multi-stage LED dimming module in accordance with the present invention, and the multi-stage LED dimming module comprises a voltage source and an LED control module, and the voltage source includes a zero line terminal and a fire wire terminal, and the LED control module includes a dual-link pull switch, a substrate, a control circuit and a plurality of LED light sources, and the control circuit includes a rectifier/filter circuit unit, a resistor array unit and a control circuit unit, and the rectifier/filter circuit unit and the resistor array unit are electrically coupled to the control circuit unit, and the dual-link pull switch is electrically coupled to the rectifier/filter circuit unit and the resistor array unit, and the rectifier/filter circuit unit and the control circuit unit are electrically coupled to the plurality of LED light sources, and the zero line terminal of the voltage source is electrically coupled to the rectifier/filter circuit unit of the control circuit of the LED control module, and the fire wire terminal is electrically coupled to the dual-link pull switch of the LED control module, and the dual-link pull switch of the LED control module is provided for controlling the switch of a stage of the dual-link pull switch to disconnect the power supplied from the voltage source or supply power of different stages and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so as to control the brightness of the LED control module. In addition, the resistor array unit may be installed onto the dual-link pull switch directly to reduce the area of the control circuit laid on the substrate and minimize the influence of the illumination efficiency of the LED light source. Further, a dimmer is installed at a front end of the dual-link pull switch and provided for controlling and switching the stage of the dual-link pull switch to the maximum brightness of the LED light source, and the dimmer is provided for adjusting the brightness of the LED light source directly, and the dimmer is controlled by a remote controller to achieve the effects of a convenient application and a stable structure.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic perspective view of the overall assembly and circuit of the present invention;
FIG. 2 is a schematic view of the assembly and circuit of an LED control module of the present invention;
FIG. 3 is a flow chart of controlling a dual-link pull switch of an LED control module of the present invention;
FIG. 4 is a flow chart of controlling and determining an LED control module of the present invention;
FIG. 5 is a schematic view of a resistor array unit externally installed to a dual-link pull switch in accordance with a first preferred embodiment of the present invention;
FIG. 6 is a schematic view of a dimmer installed at a front end of a dual-link pull switch in accordance with a second preferred embodiment of the present invention;
FIG. 7 is a schematic view of an overall assembly and a circuit of a four-stage dual-link pull switch in accordance with a third preferred embodiment of the present invention;
FIG. 8 is a flow chart of controlling a dual-link pull switch of an LED control module in accordance with the third preferred embodiment of the present invention;
FIG. 9 is a flow chart of determining and controlling an LED control module in accordance with the third preferred embodiment of the present invention;
FIG. 10 is a schematic view of an overall assembly and a circuit of a five-stage dual-link pull switch in accordance with a fourth preferred embodiment of the present invention;
FIG. 11 a flow chart of controlling a dual-link pull switch of an LED control module in accordance with the fourth preferred embodiment of the present invention;
FIG. 12 is a flow chart of determining and controlling an LED control module in accordance with the fourth preferred embodiment of the present invention; and
FIG. 13 is a schematic view of a conventional LED light source module.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The technical characteristics, contents, advantages and effects of the present invention will be apparent with the detailed description of a preferred embodiment accompanied with the illustration of related drawings as follows.
With reference to FIGS. 1 and 2 for a perspective view of the overall assembly and circuit of a multi-stage LED dimming module and a schematic view of the circuit of an LED control module in accordance with the present invention respectively, the multi-stage LED dimming module comprises: a voltage source 10, having a zero line terminal 11 and a fire wire terminal 12; and an LED control module 20, including a dual-link pull switch 21, a substrate 22, a control circuit 23 and a plurality of LED light sources 24, wherein the dual-link pull switch 21 includes a first switch 210, a second switch 211, a first conducting terminal 212, a second conducting terminal 213 and a third conducting terminal 214, and the control circuit 23 includes a rectifier/filter circuit unit 230, a resistor array unit 231 and a control circuit unit 232, and the rectifier/filter circuit unit 230 and the resistor array unit 231 are electrically coupled to the control circuit unit 232, and the dual-link pull switch 21 is electrically coupled to the rectifier/filter circuit unit 230 and the resistor array unit 231, and the rectifier/filter circuit unit 230 and the control circuit unit 232 are electrically coupled to the plurality of LED light sources 24, and the zero line terminal 11 of the voltage source 10 is electrically coupled to the rectifier/filter circuit unit 230 of the control circuit 23, and the fire wire terminal 12 is electrically coupled to the dual-link pull switch 21 or directly and electrically coupled to the rectifier/filter circuit unit 230 (not shown in the figure).
The aforementioned structure constitutes the multi-stage LED dimming module of the present invention.
With reference to FIGS. 1 to 4 for a schematic view of the overall assembly and circuit of a multi-stage LED dimming module, a schematic view of the assembly and circuit of an LED control module, a flow chart of controlling a dual-link pull switch of the LED control module, and a flow chart of controlling and determining the LED control module in accordance with the present invention respectively, the zero line terminal 11 of the voltage source 10 is electrically coupled to the rectifier/filter circuit unit 230 of the control circuit 23 of the LED control module 20, and the fire wire terminal 12 is electrically coupled to the dual-link pull switch 21 of the LED control module 20, and the dual-link pull switch 21 of the LED control module 20 may be controlled and switched to a first stage to disconnect the first switch 210, or to a second stage to conduct the first switch 210 and also conduct the second switch 211 to the first conducting terminal 212 (or conduct the second switch 211 to the first conducting terminal 212 and the second conducting terminal 213), or to a third stage to conduct the first switch 210 and also conduct the second switch 211 to the second conducting terminal 213 (or conduct the second switch 211 to the second conducting terminal 213 and the third conducting terminal 214), or to a fourth stage to conduct the first switch 210 and also conduct the second switch 211 to the third conducting terminal 214, so as to control switching the stage of the dual-link pull switch 21 to disconnect the power supplied by the voltage source 10 or supply power of different stages, and the resistor array unit 231 of the control circuit 23 is provided for changing the input of current, and the control circuit unit 232 is provided for controlling the power supplied to the plurality of LED light sources 24, so that the plurality of LED light sources 24 may have maximum brightness, half brightness or minimum brightness, so as to control the brightness of the LED control module 20 and achieve the effects of a convenient application and a stable structure.
With reference to FIGS. 5 and 6 for a schematic view of a resistor array unit externally installed to a dual-link pull switch in accordance with a first preferred embodiment of the present invention and a schematic view of a dimmer installed at a front end of the dual-link pull switch in accordance with a second preferred embodiment of the present invention respectively, the overall structure is substantially the same as that as shown in FIGS. 1 to 3 except that the resistor array unit 231 is installed onto the dual-link pull switch 21 directly, and the rectifier/filter circuit unit 230 is electrically coupled to the control circuit unit 232, and the dual-link pull switch 21 combined with the resistor array unit 231 is electrically coupled to the rectifier/filter circuit unit 230 and the control circuit unit 232, and the rectifier/filter circuit unit 230 and the control circuit unit 232 are electrically coupled to the plurality of LED light sources 24, and the zero line terminal 11 of the voltage source 10 is electrically coupled to the rectifier/filter circuit unit 230 of the control circuit 23, and the fire wire terminal 12 is electrically coupled to the dual-link pull switch 21 or directly and electrically coupled to the rectifier/filter circuit unit 230 (not shown in the figure) to reduce the area of the control circuit 23 laid on the substrate 22 and minimize the influence of the illumination efficiency of the LED light source 24. In addition, a dimmer 25 is installed at a front end of the dual-link pull switch 21 and provided for controlling and switching the stage of the dual-link pull switch 21 to the maximum brightness of the voltage source 10 introduced from the LED light source 24, and the dimmer 25 is provided for adjusting the brightness of the LED light source 24, and the dimmer 25 is controlled by a remote controller (not shown in the figure), so that the present invention achieves the effects of broadening the scope of applicability and improving the function of the present invention.
With reference to FIGS. 7 to 12 for the overall assembly and circuit of a four-stage dual-link pull switch of a multi-stage LED dimming module in accordance with the third preferred embodiment of the present invention, a flow chart of controlling a dual-link pull switch of an LED control module in accordance with the third preferred embodiment of the present invention, a flow chart of determining and controlling an LED control module in accordance with the third preferred embodiment of the present invention, a schematic view of an overall assembly and a circuit of a five-stage dual-link pull switch in accordance with a fourth preferred embodiment of the present invention, a flow chart of controlling a dual-link pull switch of an LED control module in accordance with the fourth preferred embodiment of the present invention, and a flow chart of determining and controlling an LED control module in accordance with the fourth preferred embodiment of the present invention respectively, the overall assembly is substantially the same as that of FIGS. 1 to 3 except that the dual-link pull switch 21 is a four-stage or five-stage switch. When a four-stage dual-link pull switch 21 of the LED control module 20 is operated, the dual-link pull switch 21 may be controlled to switch to a first stage to disconnect the first switch 210, or to a second stage to conduct the first switch 210 and also conduct the second switch 211 to the first conducting terminal 212 (or conduct the second switch 211 to the first conducting terminal 212 and the second conducting terminal 213), or to a third stage to conduct the first switch 210 and also conduct the second switch 211 to the second conducting terminal 213 (or conduct the second switch 211 to the second conducting terminal 213 and the third conducting terminal 214), or to a fourth stage to conduct the first switch 210 and conduct the second switch 211 to the third conducting terminal 214 (or conduct the second switch 211 to the third conducting terminal 214 and the fourth conducting terminal 215), or to a fifth stage to conduct the first switch 210 and also conduct the second switch 211 to the fourth conducting terminal 215. When a five-stage dual-link pull switch 21 of the LED control module 20 is operated, the difference of this switch from the four-stage dual-link pull switch 21 resides on that this switch may be controlled to switch to a fifth stage to conduct the first switch 210 and also conduct the second switch 211 to the fourth conducting terminal 215 (or conduct the second switch 211 to the fourth conducting terminal 215 and the fifth conducting terminal 216), or to a sixth stage to conduct the first switch 210 and also conduct the second switch 211 to the fifth conducting terminal 216, so as to control the dual-link pull switch 21 to switch the stage and disconnect the power supplied from the voltage source 10 or supply power of different stages, and the resistor array unit 231 of the control circuit 23 is provided for changing the input of current, and the control circuit unit 232 is provided for controlling the power supplied to the plurality of LED light sources 24, so that the plurality of LED light sources 24 have maximum brightness, second high brightness, third high brightness, fourth high brightness or minimum brightness, so as to control the brightness of the LED control module 20 and achieve the effects of broadening the scope of applicability and improving the function of the present invention.


1. A multi-stage LED dimming module, comprising
a voltage source, having a zero line terminal and a fire wire terminal; and
an LED control module, having a dual-link pull switch, a substrate, a control circuit and a plurality of LED light sources, and the control circuit having a rectifier/filter circuit unit, a resistor array unit and a control circuit unit, and the rectifier/filter circuit unit and the resistor array unit being electrically coupled to the control circuit unit, and the dual-link pull switch being electrically coupled to the rectifier/filter circuit unit and the resistor array unit, and the rectifier/filter circuit unit and the control circuit unit being electrically coupled to the plurality of LED light sources, and the zero line terminal of the voltage source being electrically coupled to the rectifier/filter circuit unit of the control circuit, and the fire wire terminal being electrically coupled to the dual-link pull switch.
2. The multi-stage LED dimming module according to claim 1, wherein the fire wire terminal is electrically coupled to the rectifier/filter circuit unit.
3. The multi-stage LED dimming module according to claim 1, wherein the dual-link pull switch includes a first switch, a second switch, a first conducting terminal, a second conducting terminal and a third conducting terminal, and the dual-link pull switch may be controlled to switch to a first stage to disconnect the first switch, or to a second stage to conduct the first switch and also conduct the second switch to the first conducting terminal, or to a third stage to conduct the first switch and also conduct the second switch to the second conducting terminal, or to a fourth stage to conduct the first switch, and also conduct the second switch to the third conducting terminal, so as to control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, half brightness, or minimum brightness.
4. The multi-stage LED dimming module according to claim 1, wherein the dual-link pull switch includes a first switch, a second switch, a first conducting terminal, a second conducting terminal and a third conducting terminal, and the dual-link pull switch may be controlled to switch to a first stage to disconnect the first switch, or to a second stage to conduct the first switch and also conduct the second switch to the first conducting terminal and the second conducting terminal, or to a third stage to conduct the first switch, and also conduct the second switch to the second conducting terminal and the third conducting terminal, or to a fourth stage to conduct the first switch and also conduct the second switch to the third conducting terminal, so as to control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, half brightness, or minimum brightness.
5. The multi-stage LED dimming module according to claim 1, wherein the dual-link pull switch includes a first switch, a second switch, a first conducting terminal, a second conducting terminal, a third conducting terminal and a fourth conducting terminal, and the dual-link pull switch may be controlled to switch to a first stage to disconnect the first switch, or to a second stage to conduct the first switch and also conduct the second switch to the first conducting terminal, or a third stage to conduct the first switch and also conduct the second switch to the second conducting terminal, or to a fourth stage to conduct the first switch and also conduct the second switch to the third conducting terminal, or a fifth stage to conduct the first switch and also conduct the second switch to the fourth conducting terminal, so as to control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, half brightness, or minimum brightness.
6. The multi-stage LED dimming module according to claim 5, wherein the dual-link pull switch further includes a fifth conducting terminal, and the dual-link pull switch may be controlled to switch to a fifth stage to conduct the first switch and the second switch to the fourth conducting terminal, or to a sixth stage to conduct the first switch and also conduct the second switch to the fifth conducting terminal, control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, half brightness, or minimum brightness.
7. The multi-stage LED dimming module according to claim 1, wherein the dual-link pull switch includes a first switch, a second switch, a first conducting terminal, a second conducting terminal, a third conducting terminal and a fourth conducting terminal, and the dual-link pull switch may be controlled to switch to a first stage to disconnect the first switch, or to a second stage to conduct the first switch and also conduct the second switch to the first conducting terminal and the second conducting terminal, or a third stage to conduct the first switch and also conduct the second switch to the second conducting terminal and the third conducting terminal, or to a fourth stage to conduct the first switch and also conduct the second switch to the third conducting terminal and the fourth conducting terminal, or a fifth stage to conduct the first switch and also conduct the second switch to the fourth conducting terminal, so as to control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, half brightness, or minimum brightness.
8. The multi-stage LED dimming module according to claim 7, wherein the dual-link pull switch further includes a fifth conducting terminal, and the dual-link pull switch may be controlled to switch to a fifth stage to conduct the first switch and also conduct the second switch to the fourth conducting terminal and the fifth conducting terminal, or to a sixth stage to conduct the first switch and also conduct the second switch to the fifth conducting terminal, so as to control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, half brightness, or minimum brightness.
9. The multi-stage LED dimming module according to claim 1, wherein the dual-link pull switch includes a dimmer installed at a front end of the dual-link pull switch, and the switch of a stage of the dual-link pull switch is controlled to the maximum brightness status of the LED light source, and the dimmer is provided for adjusting the brightness of the LED light source directly.
10. A multi-stage LED dimming module, comprising:
a voltage source, having a zero line terminal and a fire wire terminal; and
an LED control module, the LED control module having a dual-link pull switch, a substrate, a control circuit and a plurality of LED light sources, and the dual-link pull switch being combined with a resistor array unit, and the control circuit including a rectifier/filter circuit unit and a control circuit unit, and the rectifier/filter circuit unit being electrically coupled to the control circuit unit, and the dual-link pull switch combined with the resistor array unit being electrically coupled to the rectifier/filter circuit unit and the control circuit unit, and the rectifier/filter circuit unit and the control circuit unit being electrically coupled to the plurality of LED light sources, and the zero line terminal of the voltage source being electrically coupled to the rectifier/filter circuit unit of the control circuit, and the fire wire terminal being electrically coupled to the dual-link pull switch.
11. The multi-stage LED dimming module according to claim 5, wherein the fire wire terminal is electrically coupled to the rectifier/filter circuit unit.
12. The multi-stage LED dimming module according to claim 10, wherein the dual-link pull switch includes a first switch, a second switch, a first conducting terminal, a second conducting terminal and a third conducting terminal, and the dual-link pull switch may be controlled to switch to a first stage to disconnect the first switch, or to a second stage to conduct the first switch and also conduct the second switch to the first conducting terminal, or to a third stage to conduct the first switch and also conduct the second switch to the second conducting terminal, or to a fourth stage to conduct the first switch and also conduct the second switch to the third conducting terminal, so as to control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, half brightness, or minimum brightness.
13. The multi-stage LED dimming module according to claim 10, wherein the dual-link pull switch includes a first switch, a second switch, a first conducting terminal, a second conducting terminal and a third conducting terminal, and the dual-link pull switch may be controlled to switch to a first stage to disconnect the first switch, or to a second stage to conduct the first switch and also conduct the second switch to the first conducting terminal and the second conducting terminal, or to a third stage to conduct the first switch and also conduct the second switch to the second conducting terminal and the third conducting terminal, or to a fourth stage to conduct the first switch and also conduct the second switch to the third conducting terminal, so as to control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, half brightness, or minimum brightness.
14. The multi-stage LED dimming module according to claim 10, wherein the dual-link pull switch includes a first switch, a second switch, a first conducting terminal, a second conducting terminal, a third conducting terminal and a fourth conducting terminal, and the dual-link pull switch may be controlled to switch to a first stage to disconnect the first switch, or to a second stage to conduct the first switch and also conduct the second switch to the first conducting terminal, or to a third stage to conduct the first switch and also conduct the second switch to the second conducting terminal, or to a fourth stage to conduct the first switch and also conduct the second switch to the third conducting terminal, or to a fifth stage to conduct the first switch and also conduct the second switch to the fourth conducting terminal, so as to control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, second high brightness, third high brightness, fourth high brightness or minimum brightness.
15. The multi-stage LED dimming module according to claim 14, wherein the dual-link pull switch further includes a fifth conducting terminal, and the dual-link pull switch may be controlled to switch to a fifth stage to conduct the first switch and also conduct the second switch to the fourth conducting terminal, or to a sixth stage to conduct the first switch and also conduct the second switch to the fifth conducting terminal, so as to control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, second high brightness, third high brightness, fourth high brightness or minimum brightness.
16. The multi-stage LED dimming module according to claim 10, wherein the dual-link pull switch includes a first switch, a second switch, a first conducting terminal, a second conducting terminal, a third conducting terminal and a fourth conducting terminal, and the dual-link pull switch may be controlled to switch to a first stage to disconnect the first switch, or to a second stage to conduct the first switch and also conduct the second switch to the first conducting terminal and the second conducting terminal, or to a third stage to conduct the first switch and also conduct the second switch to the second conducting terminal and the third conducting terminal, or to a fourth stage to conduct the first switch and also conduct the second switch to the third conducting terminal and the fourth conducting terminal, or to a fifth stage to conduct the first switch and also conduct the second switch to the fourth conducting terminal, so as to control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, second high brightness, third high brightness, fourth high brightness or minimum brightness.
17. The multi-stage LED dimming module according to claim 16, wherein the dual-link pull switch further includes a fifth conducting terminal, and the dual-link pull switch may be controlled to switch to a fifth stage to conduct the first switch and also conduct the second switch to the fourth conducting terminal and the fifth conducting terminal, or to a sixth stage to conduct the first switch and also conduct the second switch to the fifth conducting terminal, so as to control and switch the stage of the dual-link pull switch for disconnecting the power supplied from the voltage source or controlling a power supply with different stages, and the resistor array unit of the control circuit is provided for changing the input of a current, and the control circuit unit is provided for controlling the power supplied to the plurality of LED light sources, so that the plurality of LED light sources may have maximum brightness, second high brightness, third high brightness, fourth high brightness or minimum brightness.
18. The multi-stage LED dimming module according to claim 5, wherein the dual-link pull switch includes a dimmer installed at a front end of the dual-link pull switch, and the switch of a stage of the dual-link pull switch is controlled to the maximum brightness status of the LED light source, and the dimmer is provided for adjusting the brightness of the LED light source directly.

 

 

Patent trol of patentswamp
Similar patents
multiple leds connected in series are driven by dc voltage that is provided by a diode rectifier, the diode rectifier being connected to a three-phase power source and converting the three-phase currents from the three-phase power source into the dc voltage that is used to drive the light emitting diodes. in order to reduce ripple in the dc voltage, the series-connected light emitting diodes can be divided into a first set and a second set, and a first constant current source is provided that drives the first set, and a second constant current source is provided that drives the second set. the first and second constant current sources are both connected across the outputs of the rectifier circuit, and operate to drive the respective sets of light emitting diodes in alternation. the capability for dimming can be provided, as well as back-up single phase operation.
the present invention relates to a drive circuit of an light-emitting diode module, which includes: an led array including a plurality of parallel groups connected in series; a power supply module for converting an external power supply into a 12v-75v forward voltage that drives each led in the led array; and a control module for controlling different gating switches to perform a conduction or cutoff operation according to a detected input voltage. the solution in accordance with the present invention can provide regular ac power for the led array, without the need of providing an electrolytic capacitor. the present invention further overcomes design defects of a dc solution, optimizes the performance of a bulb, and reduces a manufacturing cost of the bulb. compared with other lighting technologies, the ac solution reduces a total arrangement cost of the led.
an led control circuit comprises a driver, a counter, and a controller and is configured to control a plurality of light-emitting units, each of which comprises at least one led and a switch. the driver receives an alternating-current signal to output a driving signal whereby the light-emitting units are enabled. the counter begins a count from a start number when a voltage value of the driving signal equals a base value. when the count reaches a predetermined number, the controller controls the switch of at least one of the light-emitting units, causing the led of the light-emitting unit to receive the driving signal. when the led of the light-emitting unit receives the driving signal, the controller detects whether the light-emitting unit is enabled and adjusts the predetermined number accordingly.
disclosed is a backlight driving apparatus. the backlight driving apparatus includes a light source configured to include at least one led, a dc-dc converter configured to generate a driving voltage according to a turn-on of a switching element and supply the driving voltage to the light source, a feedback circuit configured to generate a feedback voltage corresponding to a voltage level of the driving voltage supplied from light source, a duty controller connected to the light source, and configured to control a turn-on period of the led according to an led duty signal corresponding to a backlight dimming signal, and a switching controller configured to generate a pwm signal for controlling the turn-on of the switching element according to the feedback signal, generate a switching control signal corresponding to the pwm signal according to the led duty signal, and selectively control the turn-on of the switching element.
a voltage converting device includes an input circuit to rectify an ac input voltage, a voltage converter receiving the rectified input voltage, a specific connection of a switch, an inductor, a capacitor and two discharging diodes coupled between the input circuit and a primary-side winding of the voltage converter, and an output circuit coupled to a secondary-side winding of the voltage converter to output a dc output voltage. through proper operation of the switch, the ac input voltage may be converted into the dc output voltage.
a backlight driving circuit includes a led driving chip for outputting a pwm signal, a power port , a voltage conversion unit , a first, a second, and a third switch unit , and a level conversion unit . the voltage conversion unit includes a primary unit and a secondary winding . the first switch unit is connected to the power port and the primary unit . the second switch unit , the secondary winding and a first led string forms a first circuit loop . the first and the second switch unit are turned on or off when receiving the pwm signal. the third switch unit , the primary winding , and a second led string form a second circuit loop . the voltage conversion unit output a reversed pwm signal to the third switch unit .
various embodiments may relate to a power supply unit including an output for outputting a current, a communications line, a current-measuring device and a microcontroller including an analog-to-digital converter. the current-measuring device generates a current on the communications line which is proportional to the conductance of a current-setting resistance, the current is convertable into a digital value by the analog-to-digital converter, the power supply unit assumes various operating states based on the digital value of the measured current, and at least one light source module is connectable to the output, wherein the at least one light source module has the current-setting resistance, which is connectable to the communications line. various embodiments may further relate to a light source module including an input, a communications line and a current-setting resistance for setting the current applied to the light source module.
adaptation circuits allow discharge lamps to be replaced by light circuits with light emitting diodes, while keeping ballast circuits designed for connection to the discharge lamps. the adaptation circuits comprise conversion circuits for converting input voltage and current signals coming from the ballast circuits into output voltage and current signals destined for the light circuits . the conversion circuits reduce amplitudes of the input voltage signals to values below predefined values during predefined time intervals after energy from the ballast circuits has been transferred to the conversion circuits . the time intervals are synchronized with periods of the input voltage signals. between first draining states for draining energy and second releasing states for releasing the energy, third states such as holding states for holding the energy have been introduced. the third states allow relevant values as experienced by the ballast circuits to remain comparable to situations when the discharge lamps were powered.
an operating circuit for light-emitting means , in particular an led string, contains an actively clocked power factor correction circuit , which produces a regulated output voltage , by means of which the light-emitting means are supplied directly or indirectly via at least one further converter stage . the regulation is performed by means of a control unit , which, as manipulated variable , actuates clocking of a switch of the power factor correction circuit . the operating circuit is designed, in the event of the presence of a predefined event, for example a rapid or sudden change in the energy demand of the light-emitting means , selectively: —to change suddenly the value of the manipulated variable using feedforward control, and/or —to vary the time constant of the control loop of the output voltage .
disclosed is an led lighting device using a ballast for a fluorescent lamp, the led lighting device including: an led part which includes at least one led device; a rectifier which rectifies a power signal outputted from the ballast for a fluorescent lamp; and a controller which receives an output signal of the rectifier and controls power transmitted from the ballast to the led part.
To top