LED dimming circuit, dimming method and lighting circuit using LED dimming circuit

• Main Authors: HE WANYUE, LIU GUOQIANG
• Format: Patent
• Language: Chinese; English
• Published: 05.07.2022
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

The invention provides an LED dimming circuit, a dimming method and a lighting circuit applying the LED dimming circuit, the dimming circuit comprises a voltage-to-current circuit, an isolation circuit and a current-to-voltage circuit, the voltage-to-current circuit receives a dimming signal and converts the dimming signal into a first current signal; the isolation circuit is connected with the voltage-to-current circuit and generates a second current signal isolated from the first current signal, and the second current signal is proportional to the first current signal; and the current-to-voltage circuit is connected with the isolation circuit and converts the second current signal into a second voltage signal, and the second voltage signal is used for driving an LED and adjusting the brightness of the LED. The LED dimming linearity is good, and peripheral devices are simple. 本发明提出一种LED调光电路、调光方法及应用其的照明电路，所述调光电路包括电压转电流电路、隔离电路和电流转电压电路，所述电压转电流电路接收调光信号，将所述调光信号转为第一电流信号；所述隔离电路与所述电压转电流电路连接，产生与第一电流信号相隔离的第二电流信号，所述第二电