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    • 4. 发明授权
    • Image display device
    • 图像显示装置
    • US06400418B1
    • 2002-06-04
    • US09251328
    • 1999-02-17
    • Toshitsugu Wakabayashi
    • Toshitsugu Wakabayashi
    • H04N514
    • G09G1/002H04N5/208H04N5/59H04N5/68H04N9/645
    • A beam current detection unit (5) detects the brightness of the image displayed on a screen (10) on the basis of a current J flowing inside a CRT (1). A drive control unit (40) selectively closes and opens the switches (42) and (43) in accordance with the detected brightness. Restriction characteristic against a current (I) flowing in a secondary winding (32) included in an inductor (3) is varied stepwise so that the inductance of a primary winding (31) is controlled. Thereby, the frequency characteristic of the gain of an amplifying unit (2) for amplifying an image signal (Pin) is controlled. The high frequency component of the gain is enhanced for a binary image of a normal display, whereas it is enfeebled for a binary image of a reverse display, for example. Thus, the visual quality of the image is optimized depending on the type of the image.
    • 光束电流检测单元(5)基于在CRT(1)内流动的电流J来检测在屏幕(10)上显示的图像的亮度。 驱动控制单元(40)根据检测到的亮度选择性地关闭和打开开关(42)和(43)。 包含在电感器(3)中的次级绕组(32)中流动的电流(I)的限制特性是逐步改变的,从而控制初级绕组(31)的电感。 由此,控制用于放大图像信号(Pin)的放大单元(2)的增益的频率特性。 增益的高频分量对于正常显示的二进制图像而言是增强的,而对于例如反向显示的二进制图像则是增强的。 因此,根据图像的类型来优化图像的视觉质量。
    • 6. 发明授权
    • Waveform generator
    • 波形发生器
    • US5283476A
    • 1994-02-01
    • US907561
    • 1992-07-02
    • Toshitsugu Wakabayashi
    • Toshitsugu Wakabayashi
    • H03K4/04H03K4/02H03K4/50H03K4/501H03K4/12
    • H03K4/50H03K4/023
    • This invention relates to a waveform generator used in a CRT display unit or the like, and to an apparatus for generating intended saw-tooth waveforms and parabolic waveforms under control of a microcomputer. The microcomputer produces a charging control signal having a prescribed pulse frequency and duty-cycle for forming a rising period in one cycle of the output waveform and supplies the signal to terminal a. Then, a capacitor is charged through a transistor and charging resistor. The microcomputer produces a discharging control signal having a prescribed pulse frequency and duty-cycle for forming a falling period in a cycle of the output waveform and supplies the signal to terminal b. Then, the capacitor is discharged through a transistor and discharging resistor. The output waveform voltage is produced across the capacitor.
    • 本发明涉及用于CRT显示单元等中的波形发生器,以及用于在微型计算机的控制下产生预期的锯齿波形和抛物面波形的装置。 微计算机产生具有规定的脉冲频率和占空比的充电控制信号,用于在输出波形的一个周期中形成上升周期,并将信号提供给端子a。 然后,通过晶体管和充电电阻对电容器充电。 微计算机产生具有规定的脉冲频率和占空比的放电控制信号,用于在输出波形的周期中形成下降周期,并将信号提供给端子b。 然后,电容器通过晶体管放电并放电电阻。 在电容器两端产生输出波形电压。
    • 7. 发明授权
    • Backlight system
    • 背光系统
    • US07314288B2
    • 2008-01-01
    • US10747192
    • 2003-12-30
    • Toshitsugu Wakabayashi
    • Toshitsugu Wakabayashi
    • F21S4/00
    • G02F1/133604G02B6/0071
    • A backlight system for use with a liquid-crystal display provides longer lamp lifetime through uniform temperature distribution, offers improved brightness uniformity and enhanced power-supply system efficiency, and ensures safety through lowered voltages. Linear lamps (21, 23) are divided into left and right approximately in the middle. The distance that heat travels is therefore shorter than when linear lamps have a length extending throughout the horizontal direction, which enables more uniform temperature distribution on the entire screen and lengthens the lifetime of linear lamps (21, 23). Furthermore, stray current is halved to achieve uniform brightness and enhanced inverter efficiency and safety can be easily ensured through lowered voltages.
    • 用于液晶显示器的背光系统通过均匀的温度分布提供更长的灯泡寿命,提供改善的亮度均匀性和增强的电源系统效率,并通过降低的电压来确保安全性。 线性灯(21,23)大约在中间分为左右。 因此,热线行进的距离比线性灯的整个水平方向延伸的长度短,这使整个屏幕上的温度分布更加均匀,并延长了线状灯(21,23)的使用寿命。 此外,杂散电流减半,以实现均匀的亮度和提高的逆变器效率,并且可以通过降低的电压容易地确保安全性。