Light source system with single power supply

Abstract

The invention is applicable to the field of light source, and provides a light source system with a single power supply. The light source system comprises: a first power supply used for supplying first voltage; a first light-emitting load which is electrically connected with the first power supply and loaded with second voltage, and emits light according to the current flowing through; a second light-emitting load which is electrically connected with the first power supply and loaded with third voltage, and emits light according to the current flowing through; and a voltage compensation module which comprises a first voltage compensation device electrically connected with the first light-emitting load and loaded with fourth voltage, and a second voltage compensation device electrically connected with the second light-emitting load and loaded with fifth voltage; the sum of the second voltage and the fourth voltage equals to the first voltage; and the sun of the third voltage and the fifth voltage equals to the first voltage. The light source system utilizes the voltage compensation module for compensating the voltage difference among the serials of each light-emitting diode, thus leading a plurality of serials of the light-emitting diodes to be capable of sharing one power supply, reducing the cost and improving the convenience.

Description

technical field [0001] The invention belongs to the field of light sources, in particular to a light source system with a single power supply. Background technique [0002] Please refer to figure 1 . figure 1 is a schematic diagram of a light source system 100 in the prior art. The light source system 100 includes a power supply module 110 , a light emitting module 120 and a current control module 130 . [0003] The power supply module 110 includes three DC / DC converters (power supplies) 111, 112 and 113, which are used to convert an input DC voltage V IN converted to DC voltage V OUTR , V OUTG , V OUTB , so as to provide the light emitting module 120 for use. [0004] The light emitting module 120 includes three groups of light emitting diodes (Light Emitting Diode, LED) serial (light emitting load) LEDs R ,LED G and LED B . Each group of light-emitting diode strings can be composed of M light-emitting diodes connected in series. For example, light-emitting diod...

AI Technical Summary

Problems solved by technology

In other words, if there are more different kinds of LED series in the light-emitting module 120, the power supply module 110 will need more and different DC / DC converters to generate the required voltage, resulting in an increase in cost and a reduction in the cost. Convenience for users to use light source system 100

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