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    • 5. 发明授权
    • Drive circuit for an electroluminescence display device
    • 驱动电路用于电致发光显示装置
    • US5027036A
    • 1991-06-25
    • US396505
    • 1989-08-21
    • Masami IkarashiKenichi Mitsumori
    • Masami IkarashiKenichi Mitsumori
    • G09G3/30H05B33/08
    • H05B33/08Y02B20/325
    • There is provided a drive circuit for an electro-luminescence (EL) display device comprising a variable frequency oscillator circuit whose output signal frequency is externally modifiable, a voltage booster circuit for boosting the output signal of said variable frequency oscillator circuit to a predetermined level and supplying it to an EL display device as drive voltage, an impedance matching circuit whose impedance is externally modifiable and which is connected to said display device, a timing means for timing the duration of application of drive voltage to said display device and a control means for switching the output signal frequency of said variable frequency oscillator circuit and the impedance of said impedance matching circuit in accordance with said duration of voltage application. It is apparent that a drive circuit having such an arrangement as described above can effectively correct any shift of color of the light emitted from the connected EL display device and maintain the origninal color of the EL display device. Moreover, such a drive circuit for an EL display device can effectively compensate the loss of brightness of the screen of the EL display device connected therewith and hence prolong the apparent life of the display device.
    • 提供了一种用于电致发光(EL)显示装置的驱动电路,其包括其输出信号频率可外部修改的可变频率振荡器电路,用于将所述可变频率振荡器电路的输出信号升压到预定水平的升压电路,以及 将其作为驱动电压提供给EL显示装置,阻抗可外部修改并连接到所述显示装置的阻抗匹配电路,用于对驱动电压施加到所述显示装置的持续时间的定时装置,以及用于 根据所述电压施加的持续时间,切换所述可变频率振荡器电路的输出信号频率和所述阻抗匹配电路的阻抗。 显然,具有如上所述的这种布置的驱动电路可以有效地校正从所连接的EL显示装置发射的光的颜色偏移,并维持EL显示装置的标志颜色。 此外,这种用于EL显示装置的驱动电路可以有效地补偿与其连接的EL显示装置的屏幕的亮度损失,从而延长显示装置的表观寿命。