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    • 1. 发明授权
    • Electroluminescent driving apparatus with photodetector
    • 带光电检测器的电致发光驱动装置
    • US06005350A
    • 1999-12-21
    • US27623
    • 1998-02-23
    • Yoshiaki HachiyaYuji YamanishiYuji Ueno
    • Yoshiaki HachiyaYuji YamanishiYuji Ueno
    • H05B33/08H05B37/02
    • H05B33/08Y02B20/325
    • An EL driving apparatus is composed of a display portion, a photodiode as changing means for changing a reference voltage for controlling an increased voltage based on ambient brightness and a control portion for controlling the timing of discharging based on the reference voltage. The control portion has a comparator for comparing a specified peak value obtained by reducing the increased voltage generated by voltage increasing means with the reference voltage generated from within. The increased voltage is inputted to the control portion. The increased voltage is reduced to provide a detect voltage that can be inputted to the comparator. The comparator has a positive-phase input terminal for receiving the detect voltage and a negative-phase input terminal for receiving the reference voltage produced at a connection point between a constant current source and a resistor connected in series to each other. The photodiode is connected between the ground and the connection point between the constant current source and the resistor to form a reverse bias.
    • EL驱动装置由显示部分,光电二极管作为改变装置,用于根据环境亮度改变用于控制增加的电压的参考电压,以及用于根据参考电压控制放电定时的控制部分。 控制部分具有比较器,用于将通过将由电压增加装置产生的增加的电压减小到由内部产生的参考电压获得的指定峰值进行比较。 增加的电压被输入到控制部分。 降低升高的电压以提供可以输入到比较器的检测电压。 比较器具有用于接收检测电压的正相输入端子和用于接收在恒定电流源和彼此串联连接的电阻器之间的连接点处产生的参考电压的负相输入端子。 光电二极管连接在恒流源和电阻之间的接地点和连接点之间,形成反向偏压。