Low-visual noise, jitterized pulse width modulation brightness control circuit
    1.
    发明授权
    Low-visual noise, jitterized pulse width modulation brightness control circuit 有权
    低视觉噪声,抖动脉宽调制亮度控制电路

    公开(公告)号:US07253567B2

    公开(公告)日:2007-08-07

    申请号:US11139125

    申请日:2005-05-27

    IPC分类号: G05F1/00

    摘要: A low visual noise, jitterized pulse width modulation brightness control circuit is provided. The circuit uses a brightness control signal generating unit to receive a brightness adjusting signal and to generate a brightness control signal in response to the brightness adjusting signal. The brightness control pulse signal has a duty cycle or frequency varying in a predetermined range. An inverter coupled to the brightness control signal generating unit drives the fluorescent lamp in response to the brightness control pulse signal to reduce the visual interference due to the adjustment of the current beam density.

    摘要翻译: 提供了低视觉噪声,抖动脉冲宽度调制亮度控制电路。 该电路使用亮度控制信号发生单元接收亮度调节信号,并响应亮度调节信号产生亮度控制信号。 亮度控制脉冲信号具有在预定范围内变化的占空比或频率。 耦合到亮度控制信号发生单元的反相器响应于亮度控制脉冲信号来驱动荧光灯,以减少由于当前光束密度的调整引起的视觉干扰。

    Low-visual noise, jitterized pulse width modulation brightness control circuit
    4.
    发明申请
    Low-visual noise, jitterized pulse width modulation brightness control circuit 有权
    低视觉噪声,抖动脉宽调制亮度控制电路

    公开(公告)号:US20050057170A1

    公开(公告)日:2005-03-17

    申请号:US10712246

    申请日:2003-11-12

    摘要: A low visual noise, jitterized pulse width modulation brightness control circuit is provided. The circuit uses a brightness control signal generating unit to receive a brightness adjusting signal and to generate a brightness control signal in response to the brightness adjusting signal. The brightness control pulse signal has a duty cycle or frequency varying in a predetermined range. An inverter coupled to the brightness control signal generating unit drives the fluorescent lamp in response to the brightness control pulse signal to reduce the visual interference due to the adjustment of the current beam density.

    摘要翻译: 提供了低视觉噪声,抖动脉冲宽度调制亮度控制电路。 该电路使用亮度控制信号发生单元接收亮度调节信号,并响应亮度调节信号产生亮度控制信号。 亮度控制脉冲信号具有在预定范围内变化的占空比或频率。 耦合到亮度控制信号发生单元的反相器响应于亮度控制脉冲信号来驱动荧光灯,以减少由于当前光束密度的调整引起的视觉干扰。