Patent Application
20160021710
1. Field of the Invention
The present invention relates to a light emitting diode driving apparatus, and especially relates to an improved light emitting diode driving apparatus.
2. Description of the Related Art
Nowadays, the connection types of the light emitting diode lamp string modules are separated into two types: the serial-type connection and the parallel-type connection. The light emitting diode lamp string modules are widely used for external walls of the building, decoration of trees, signboards, and scenery designing.
In the related art serial-type light emitting diode lamp string modules, a plurality of light emitting diode lamp string modules are commonly connected in series. Also, the amount of the light emitting diode lamp string modules is determined according to the volume of the decorated objects. In addition, all of the light emitting diode lamp string modules are controlled by the same controller which initially controls the first light emitting diode lamp string module.
The parallel-type light emitting diode lamp string modules are connected to the controller in parallel. Accordingly, each one of the light emitting diode lamp string modules is controlled by the controller through a control line and an address line, respectively. For example, ten control lines and ten address lines need to be used when ten light emitting diode lamp string modules are employed to be connected in parallel.
Both the related art serial-type light emitting diode lamp string module and the related art parallel-type light emitting diode lamp string module have different advantages and disadvantages. However, it is a pity that currently there is no product combining both the related art serial-type light emitting diode lamp string module and the related art parallel-type light emitting diode lamp string module.
In order to solve the above-mentioned problems, an object of the present invention is to provide a light emitting diode driving apparatus.
In order to achieve the object of the present invention mentioned above, the light emitting diode driving apparatus is applied to an alternating current power supply apparatus, an alternating current to direct current power supply apparatus and a plurality of light emitting diodes. The alternating current power supply apparatus sends an alternating current power to the alternating current to direct current power supply apparatus. The alternating current to direct current power supply apparatus converts the alternating current power into a direct current power. The light emitting diode driving apparatus comprises a direct current power input contact, a light signal control unit, a first light emitting diode driving unit and at lease a second light emitting diode driving unit. The direct current power input contact is electrically connected to the alternating current to direct current power supply apparatus to receive the direct current power. The light signal control unit is electrically connected to the direct current power input contact. The first light emitting diode driving unit is electrically connected to the direct current power input contact, the light emitting diodes and the light signal control unit. The second light emitting diode driving unit is electrically connected to the direct current power input contact, the light emitting diodes and the first light emitting diode driving unit. The first light emitting diode driving unit includes a plurality of first light emitting diode driving subunits. The first light emitting diode driving subunits are electrically connected to each other in series. The first light emitting diode driving subunits are electrically connected to the direct current power input contact, the light emitting diodes, the light signal control unit and the second light emitting diode driving unit. The second light emitting diode driving unit includes a light signal conversion subunit and a plurality of second light emitting diode driving subunits. The light signal conversion subunit is electrically connected to the direct current power input contact and the first light emitting diode driving unit. The second light emitting diode driving subunits are electrically connected to each other in series. The second light emitting diode driving subunits are electrically connected to the direct current power input contact, the light emitting diodes and the first light emitting diode driving unit. The light signal control unit, the first light emitting diode driving unit and the second light emitting diode driving unit are electrically connected in parallel to receive the direct current power. The light signal control unit sends a light signal to the first light emitting diode driving unit, and then the first light emitting diode driving unit sends the light signal to the second light emitting diode driving unit, so that the light signal is transmitted between the first light emitting diode driving unit and the second light emitting diode driving unit in series. The first light emitting diode driving subunits and the second light emitting diode driving subunits drive the light emitting diodes according to the light signal. The light signal conversion subunit boosts a voltage of the light signal, so that the light signal is sent to the second light emitting diode driving subunits.
The efficiency of the present invention is to combine the advantages of the serial-type light emitting diode lamp string module (having a small current) and the parallel-type light emitting diode lamp string module (having a constant working voltage), so that the circuit design is simple and the cost is reduced.
The light emitting diode driving apparatus 10 comprises a direct current power input contact 102, a light signal control unit 104, a first light emitting diode driving unit 106 and at lease a second light emitting diode driving unit 108.
The direct current power input contact 102 is electrically connected to the alternating current to direct current power supply apparatus 30 to receive the direct current power 32. The light signal control unit 104 is electrically connected to the direct current power input contact 102. The first light emitting diode driving unit 106 is electrically connected to the direct current power input contact 102, the light emitting diodes 40 and the light signal control unit 10. The second light emitting diode driving unit 108 is electrically connected to the direct current power input contact 102, the light emitting diodes 40 and the first light emitting diode driving unit 106.
The first light emitting diode driving unit 106 includes a plurality of first light emitting diode driving subunits 10602 and a first voltage regulation subunit 10604.
The first light emitting diode driving subunits 10602 are electrically connected to each other in series. The first light emitting diode driving subunits 10602 are electrically connected to the direct current power input contact 102, the light emitting diodes 40, the light signal control unit 104 and the second light emitting diode driving unit 108. The first voltage regulation subunit 10604 is electrically connected to the direct current power input contact 102 and the first light emitting diode driving subunit 10602. The first voltage regulation subunit 10604 is, for example but not limited to, a Zener diode.
The second light emitting diode driving unit 108 includes a light signal conversion subunit 10802, a plurality of second light emitting diode driving subunits 10804 and a second voltage regulation subunit 10806.
The light signal conversion subunit 10802 is electrically connected to the direct current power input contact 102 and the first light emitting diode driving unit 106. The second light emitting diode driving subunits 10804 are electrically connected to each other in series. The second light emitting diode driving subunits 10804 are electrically connected to the direct current power input contact 102, the light emitting diodes 40 and the first light emitting diode driving unit 106. The second voltage regulation subunit 10806 is electrically connected to the direct current power input contact 102 and the second light emitting diode driving subunit 10804. The second voltage regulation subunit 10806 is, for example but not limited to, a Zener diode.
The light signal control unit 104, the first light emitting diode driving unit 106 and the second light emitting diode driving unit 108 are electrically connected in parallel to receive the direct current power 32.
The light signal control unit 104 sends a light signal 10402 to the first light emitting diode driving unit 106, and then the first light emitting diode driving unit 106 sends the light signal 10402 to the second light emitting diode driving unit 108, so that the light signal 10402 is transmitted between the first light emitting diode driving unit 106 and the second light emitting diode driving unit 108 in series.
The first light emitting diode driving subunits 10602 and the second light emitting diode driving subunits 10804 drive the light emitting diodes 40 according to the light signal 10402. The light signal conversion subunit 10802 boosts a voltage of the light signal 10402, so that the light signal 10402 is sent to the second light emitting diode driving subunits successfully. For example, the voltage of the light signal 10402 is boosted to be higher than a working voltage of the second light emitting diode driving subunit 10804.
Moreover, a first of the second light emitting diode driving units 108 is connected to the direct current power input contact 102, the light emitting diodes 40 and the first light emitting diode driving unit 106. The remaining second light emitting diode driving units 108 are connected to the direct current power input contact 102, the light emitting diodes 40 and a previous second light emitting diode driving unit 108.
A first of the first light emitting diode driving subunits 10602 is connected to the direct current power input contact 102, the light emitting diodes 40 and the light signal control unit 104. A last of the first light emitting diode driving subunits 10602 is connected to the light emitting diodes 40, a previous first light emitting diode driving subunit 10602 and the first of the second light emitting diode driving units 108. The remaining first light emitting diode driving subunits 10602 are connected to the light emitting diodes 40 and the previous first light emitting diode driving subunit 10602.
The light signal conversion subunit 10802 of the first of the second light emitting diode driving units 108 is connected to the direct current power input contact 102 and the last of the first light emitting diode driving subunits 10602 of the first light emitting diode driving unit 106. The light signal conversion subunits 10802 of the remaining second light emitting diode driving units 108 are connected to the direct current power input contact 102 and the previous second light emitting diode driving unit 108.
A first of the second light emitting diode driving subunits 10804 is connected to the direct current power input contact 102, the light emitting diodes 40 and the light signal conversion subunit 10802. A last of the second light emitting diode driving subunits 10804 is connected to the light emitting diodes 40, a previous second light emitting diode driving subunit 10804 and the light signal conversion subunit 10802 of a next second light emitting diode driving unit 108. The remaining second light emitting diode driving subunits 10804 are connected to the light emitting diodes 40 and the previous second light emitting diode driving subunit 10804.
The light emitting diode 40 mentioned above can be a packaged light emitting diode unit or a light emitting diode chip. The light emitting diode 40 can be integrated with the first light emitting diode driving subunit 10602 or the second light emitting diode driving subunit 10804 as a packaged light emitting diode unit when the light emitting diode 40 is a light emitting diode chip.
The first capacitor 10404 is electrically connected to the direct current power input contact 102. The first Zener diode 10406 is electrically connected to the direct current power input contact 102. The microcontroller 10408 is electrically connected to the direct current power input contact 102. The first resistor 10410 is electrically connected to the first capacitor 10404, the first Zener diode 10406 and the microcontroller 10408. The first transistor 10412 is electrically connected to the microcontroller 10408 and the first light emitting diode driving unit 106. The second resistor 10414 is electrically connected to the first transistor 10412. The second capacitor 10416 is electrically connected to the first transistor 10412.
The third resistor 10808 is electrically connected to the direct current power input contact 102. The first diode 10810 is electrically connected to the direct current power input contact 102. The second transistor 10812 is electrically connected to the direct current power input contact 102 and the second light emitting diode driving subunit 10804. The fourth resistor 10814 is electrically connected to the third resistor 10808, the first diode 10810 and the second transistor 10812. The third transistor 10816 is electrically connected to the fourth resistor 10814 and the first light emitting diode driving unit 106. The fifth resistor 10818 is electrically connected to the third transistor 10816 and the first light emitting diode driving unit 106.
The third resistor 10808 is electrically connected to the first light emitting diode driving unit 106. The first diode 10810 is electrically connected to the direct current power input contact 102. The third capacitor 10820 is electrically connected to the third resistor 10808, the first light emitting diode driving unit 106, the first diode 10810 and the second light emitting diode driving subunit 10804. The second diode 10822 is electrically connected to the third capacitor 10820, the first diode 10810 and the second light emitting diode driving subunit 10804.
The advantage of the present invention is to combine the advantages of the serial-type light emitting diode lamp string module (having a small current) and the parallel-type light emitting diode lamp string module (having a constant working voltage), so that the circuit design is simple and the cost is reduced.
Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.
