Thyristor dimming control method, control circuit and lighting circuit

• Main Authors: HUANG BILIANG, ZHOU XUNWEI, BAI LANG
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2019
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

The invention discloses a thyristor dimming control method, control circuit and lighting circuit. The AC input is provided with thyristor dimmer, the AC input is rectified to obtain a rectified voltage, the rectified voltage supplies power to the LED lamp through the power supply circuit. The power supply circuit does not supply power to the LED lamp when the SCR dimmer ON time is less than a first time, and pulls down a rectified voltage, and supplies power to the LED lamp when the SCR dimmer ON time is greater than a second time, the second time being greater than or equal to the first time.When the SCR dimmer conduction angle is small, the power supply circuit does not supply power to the LED lamp, so as to avoid the flicker of the LED lamp caused by the difference of the positive andnegative half waveguide conduction angles. 本发明公开了种可控硅调光控制方法、控制电路及照明电路，交流输入带有可控硅调光器，所述交流输入经整流后得到整流电压，所述整流电压经过电源电路对LED灯供电，当所述可控硅调光器导通时间小于第时间，所述电源电路不向所述LED灯供电，并且下拉整流电压，当所述可控硅调光器导通时间大于第二时间，所述电源电路向所述LED灯供电，所述第二时间大于等于所述第时间。在可控硅调光器导通