CIRCUIT FOR CHANGING INDICATOR LAMP DURING CHARGING

WIPO Patent Application WO/2019/015225

A1

A circuit for changing an indicator lamp during charging. The circuit comprises: a first operational amplifier (IC1), a first sampling voltage (Ub) being input to a non-inverting input end thereof, and a first reference voltage (Uc) being input to an inverting input end thereof; a first transistor (Q1), the base thereof being connected to an output end of the first operational amplifier via a first resistor (R1), the emitter thereof being connected to a second reference voltage (Ue) via a second resistor (R2), and the collector thereof being connected to an anode of a first light emitting diode (LED1); a second transistor (Q2), the base thereof being connected to the output end of the first operational amplifier via a third resistor (R3), the emitter thereof being connected to an anode of a second light emitting diode (LED2), and the collector thereof being connected to the second reference voltage, wherein cathodes of the first light emitting diode and the second light emitting diode are grounded, and colors emitted by the diodes are different. The circuit for changing an indicator lamp during charging is simple and useful, enabling more convenient observation of the charging state of batteries.

YANG YONG (CN)
LIU FANGYUN (CN)

PCT/CN2017/114868

January 24, 2019

December 06, 2017

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SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECH CO LTD (CN)

H05B44/00; H02J7/00

CN107332308A	2017-11-07
CN203674759U	2014-06-25
CN201504113U	2010-06-09
KR100233163B1	1999-12-01

See also references of EP 3657625A4

COMIPS INTELLECTUAL PROPERTY OFFICE (CN)

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