| 摘要 |
The present invention provides a method for multiplying current of an LED light bar, which includes (1) providing a constant current driving chip that includes driving modules each having first to three pins and resistors; (2) providing an LED light bar, a power source, and a PWM control source; (3) connecting an end of one resistor to the third pin of one driving module and an opposite end grounded, connecting the first pin of the driving module to the negative terminal of the light bar, connecting the second pin of the driving module to the PWM control source, and connecting the positive terminal of the light bar to the power source; (4) repeating step (3) as necessary to have multiple driving modules electrically connected to the light bar; (5) activating the power source and the PWM control source to allow the driving modules to simultaneous drive the light bar. |
| 主权项 |
1. A method for multiplying current of a light emitting diode (LED) light bar, comprising the following steps:
(1) providing a constant current driving chip and a plurality of resistors, wherein the constant current driving chip comprises a plurality of constant current driving modules respectively corresponding to the plurality of resistors and each of the constant current driving modules comprises first to third pins; (2) providing a single LED light bar that comprises a plurality of LEDs, a power source, and a single pulse width modulation (PWM) control source, wherein the LED light bar has a positive terminal and a negative terminal; (3) connecting an end of a first one of the resistors to the third pin of an associated one of the constant current driving modules and an opposite end to a ground line, connecting the first pin of the associated one of the constant current driving modules to the negative terminal of the single LED light bar, connecting the second pin of the associated one of the constant current driving modules to the single PWM control source, and connecting the positive terminal of the single LED light bar to the power source; (4) repeating step (3) in such a way as to connect an end of a second one of the resistors to the third pin of an associated one of the constant current driving modules and an opposite end to the ground line, connecting the first pin of the associated one of the constant current driving modules to the negative terminal of the single LED light bar, connecting the second pin of the associated one of the constant current driving modules to the single PWM control source, and connecting the positive terminal of the LED light bar to a power source so as to have the plurality of constant current driving modules electrically connected to the single LED light bar, the plurality of resistors, the power source, and the single PWM control source, wherein the plurality of the constant current driving modules is collectively connected in parallel between the negative terminal of the single LED light source and the single PWM control source with the plurality of the resistors grounded by individually connecting to the ground line and wherein each of the plurality of the constant current driving modules supplies a current flowing completely through the plurality of LEDs of the LED light bar; and (5) activating the power source and the PWM control source in order to allow the plurality of constant current driving modules to be simultaneously activated by a single signal from the PWM control source to supply the currents to the single LED light bar at the same time to drive the single LED light bar to give off light, wherein the currents supplied from the plurality of constant current driving modules that are simultaneously activated by a single signal from the PWM control source simultaneously flow through the single LED light bar to enhance brightness achieved with the LED light bar in such a way that the current supplied from each of the plurality of constant current driving modules flows completely through the LED light bar. |
