Direct current (DC) drive circuit for light-emitting components

Abstract

The invention provides a direct current (DC) drive circuit for light-emitting components, which is used for driving a plurality of light-emitting components, wherein the DC drive circuit for the light-emitting components comprises a rectifying unit, a current-rating unit and a light-emitting module. The rectifying unit can receive an external alternating current (AC) voltage, and further, rectifies the AC voltage into a DC voltage. The current-rating unit is electrically connected with the rectifying unit, and further, generates a corresponding DC according to the DC voltage so as to drive the light-emitting module. The light-emitting components and at least one diode are serially connected in the light-emitting module, and further, the light-emitting components are respectively in parallel connection with a voltage-stabilizing capacitor. With the adoption of the drive circuit provided by the invention, the DC load drive with high efficiency and high stability can be reached, and a higher power factor is provided.

Description

technical field [0001] The present invention relates to a direct current drive circuit for light emitting components, in particular to a DC load drive circuit for high-efficiency light emitting components using a voltage stabilizing light emitting sub-unit composed of a light emitting component with an independent circuit and a voltage stabilizing capacitor. Background technique [0002] In the prior art, the DC driving circuit of the light-emitting component is as follows figure 1 shown. The driving circuit 1 receives a direct current DC to drive the light-emitting element, and then uses a capacitor C connected in parallel to stabilize the voltage. [0003] However, if the above-mentioned driving circuit 1 is used to drive the light-emitting diode LED, the light-emitting diode LED will flicker or the power factor will be low. It is because the direct current DC charges the capacitor C during the first half cycle, so that the capacitor C C is fully charged with the voltage...

AI Technical Summary

Problems solved by technology

[0003] However, if the above-mentioned driving circuit 1 is used to drive the light-emitting diode LED, the light-emitting diode LED will flicker or the power factor will be low. It is because the direct current DC charges the capacitor C during the first half cycle, so that the capacitor C C is fully charged with the voltage V corresponding to the direct current DC. When it proceeds to the next half cycle, it is necessary to wait for the DC voltage VDC formed by the external AC voltage to be higher than the voltage V before it is possible to effectively charge the capacitor C. , the waiting time will not only cause the charging time of the capacitor C to be prolonged, but also the capacitor C will continue to discharge the light-emitting diode LED at the same time, and then the voltage V will gradually drop. The ripple (Ripple) formed on the capacitor C changes drastically, which in turn affects the state of the light-emitting diode LED flickering or even extinguishing

Images