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    Method and apparatus for driving a capacitive flat matrix display panel
    1.
    发明授权
    Method and apparatus for driving a capacitive flat matrix display panel 失效
    用于驱动电容平面矩阵显示面板的方法和装置

    公开(公告)号：US5206631A

    公开(公告)日：1993-04-27

    申请号：US688144

    申请日：1991-04-22

    申请人： Kyoichi Yamamoto ,  Shigeyuki Harada ,  Atsushi Sakamoto ,  Toshihiro Ohba ,  Hiroshi Kishishita

    发明人： Kyoichi Yamamoto ,  Shigeyuki Harada ,  Atsushi Sakamoto ,  Toshihiro Ohba ,  Hiroshi Kishishita

    IPC分类号： G09G3/22 ,  G09G3/30

    CPC分类号： G09G3/30 ,  G09G2310/0267 ,  G09G2310/0275 ,  G09G2310/0281

    摘要： In a display device having a plurality of scanning-side electrodes arranged in one direction, a plurality of data-side electrodes arranged in a second direction intersection the first direction, and dielectric layers interposed therebetween, a modulated voltage the magnitude of which is varied according to the emission or non-emission of light is applied to the data-side electrodes, while applying a write voltage in line sequential fashion to the scanning-side electrodes, thereby performing the display control. In such a display device, the polarity of the voltage applied between the data-side electrode and the scanning-side electrode corresponding to the picture element to be driven for light emission is reversed one or more times during the period in which the write voltage is being applied to the scanning-side electrode. This serves to reduce the modulated voltage and the write voltage, thus contributing to the reduction in power consumption. Even when the modulated voltage or the write voltage is reduced, the desired brightness of emitted light can be obtained. In the case of not lowering the modulated voltage or the write voltage, it is possible to further enhance the brightness of emitted light.

    Electroluminescent panel driving system for driving the panel's electrodes only when non-blank data is present to conserve power
    4.
    发明授权
    Electroluminescent panel driving system for driving the panel's electrodes only when non-blank data is present to conserve power 失效
    电致发光面板驱动系统，仅当存在非空白数据才能驱动面板的电极以节省电力

    公开(公告)号：US4823121A

    公开(公告)日：1989-04-18

    申请号：US918902

    申请日：1986-10-15

    申请人： Atsushi Sakamoto ,  Shigeyuki Harada ,  Toshihiro Ohba

    发明人： Atsushi Sakamoto ,  Shigeyuki Harada ,  Toshihiro Ohba

    IPC分类号： G09G3/30

    CPC分类号： G09G3/30 ,  G09G2310/0267 ,  G09G2310/0275 ,  G09G2330/021

    摘要： An EL (electroluminescent) panel driving system includes a display control circuit for producing, line by line, an image data. The image data of each line is defined by a combination of a HIGH level signal representing a spot illumination of the EL panel and a LOW level signal representing a non-illumination of a spot on the EL panel. The system further includes a pre-charge circuit and a pull-up charge circuit for providing a first range voltage to the EL panel at the beginning of each line scan operation to make the EL panel ready to illuminate, and a write-in circuit and a source level switching circuit for providing a second range voltage to the EL panel to permit the spot illumination of the EL panel in accordance with the HIGH level signals contained in the image data. These four circuits are turned on by four signals. The driving system also includes a detector that detects when no HIGH level signal are present in the image data of a line, an AND gate array for cutting off the four signals from the pre-charge circuit, pull-up circuit, write-in circuit, and source circuit, the four circuits are prevented from being actuated, thereby cutting off the power normally supplied during the blank line scanning to save power.

    摘要翻译： EL（电致发光）面板驱动系统包括用于逐行地生成图像数据的显示控制电路。 每行的图像数据由表示EL面板的点照明的HIGH电平信号和表示EL面板上的点的非照明的LOW电平信号的组合来定义。 该系统还包括预充电电路和上拉充电电路，用于在每行扫描操作开始时向EL面板提供第一范围电压，以使得EL面板准备点亮，以及一个写入电路和 源极电平切换电路，用于向EL面板提供第二范围电压，以允许根据包含在图像数据中的高电平信号对EL面板进行点亮。 这四个电路通过四个信号接通。 该驱动系统还包括检测器，用于检测线路的图像数据中何时不存在高电平信号，用于从预充电电路，上拉电路，写入电路切断四个信号的与门阵列 和源电路，防止四个电路被致动，从而切断在空行扫描期间正常供应的电力以节省功率。

    Thin-film EL display panel drive circuit
    6.
    发明授权
    Thin-film EL display panel drive circuit 失效
    薄膜EL显示面板驱动电路

    公开(公告)号：US4914353A

    公开(公告)日：1990-04-03

    申请号：US217076

    申请日：1988-07-08

    申请人： Shigeyuki Harada ,  Toshihiro Ohba ,  Yoshiharu Kanatani ,  Hisashi Uede

    发明人： Shigeyuki Harada ,  Toshihiro Ohba ,  Yoshiharu Kanatani ,  Hisashi Uede

    IPC分类号： G09G3/30

    CPC分类号： G09G3/30 ,  G09G2310/0267 ,  G09G2310/0275

    摘要： The preferred embodiment discloses a new thin-film EL display panel drive circuit using EL layers installed between the scan-side electrodes and the data-side electrodes aligned so as to allow them to cross one another, comprising: scan-side electrodes connected to the drain terminal of the N-ch high-voltage resistant driver having a grounded source terminal and also connected to the other drain terminal of the P-ch high-voltage resistant driver having a source terminal connected to the pull-up charge drive circuit and to the write drive circuit via the scan-side common bus line; and data-side electrodes connected to the drain terminal of the N-ch high-voltage resistant driver having a grounded source terminal and also having the anode common terminal connected to the cathode terminal of the diode array connected to the preliminary charge drive circuit via the data-side common bus line. By grounding the source terminal to the scan-side N-ch MOS ICs, some of the floating-output logic-circuit driving power sources and some of the logic signal transmission photo-couplers can be eliminated. This not only saves component elements conventionally needed for the P-N symmetric EL display panel drive circuits, but also securely suppresses noise interference, thus offering an indispensable technique giving an early and overall improvement over those thin-film EL display drive circuits thus far made available.

    摘要翻译： 优选实施例公开了一种使用安装在扫描侧电极和数据侧电极之间的EL层的新的薄膜EL显示面板驱动电路，其被排列成允许它们彼此交叉，包括：扫描侧电极 具有接地源极端子的N沟道高压驱动器的漏极端子，并且还连接到具有连接到上拉电荷驱动电路的源极端子的P沟道高耐压驱动器的另一个漏极端子，以及 写入驱动电路经由扫描侧公共总线; 以及连接到具有接地源极端子的N沟道高耐压驱动器的漏极端子的数据侧电极，并且还具有连接到经由初级充电驱动电路的二极管阵列的阴极端子的阳极公共端子 数据端公共总线。 通过将源极端子接地到扫描侧N沟道MOS IC，可以消除浮置输出逻辑电路驱动电源中的一些和一些逻辑信号传输光电耦合器。 这不仅节省了P-N对称EL显示面板驱动电路通常所需要的元件，而且可以安全地抑制噪声干扰，从而提供了迄今为止可用的薄膜EL显示驱动电路的早期和整体改进的不可或缺的技术。

    Driving circuit of thin membrane EL display apparatus
    7.
    发明授权
    Driving circuit of thin membrane EL display apparatus 失效
    薄膜EL显示装置的驱动电路

    公开(公告)号：US4888523A

    公开(公告)日：1989-12-19

    申请号：US332450

    申请日：1989-04-03

    申请人： Kazuo Shoji ,  Yosihide Fujioka ,  Shigeyuki Harada ,  Toshihiro Ohba

    发明人： Kazuo Shoji ,  Yosihide Fujioka ,  Shigeyuki Harada ,  Toshihiro Ohba

    IPC分类号： G09G3/30

    CPC分类号： G09G3/30 ,  G09G2310/0267 ,  G09G2310/0275 ,  G09G2310/0289 ,  G09G2330/023

    摘要： The present invention relates to a driving circuit of a thin film electroluminescent (EL) display, wherein a high withstand-voltage driver IC composed of a bi-directional switching element having push/pull function is connected with one or both of the scanning electrodes and the data electrodes of EL display, the bi-directional switching circuit for applying the writing voltage or the modulation voltage is applied with the pull up common line of each of the drivers IC and the pull down common line, a switch for extremely recovering, after the thin film EL element has emitted its light, the electric charge accumulated on the thin film EL display element, and a capacitor for accumulating the drawn out electric charge are disposed in the bi-directional switching circuit, and the modulation accumulation electric charge accumulated on the film EL display element after the light emission is accumulated on the capacitor, so that the modulation consumption power occupying the majority of the driving power without the damages to the conventional advantages may be reduced by 25% as compared with the conventional driving.

    摘要翻译： 本发明涉及薄膜电致发光（EL）显示器的驱动电路，其中由具有推/拉功能的双向开关元件组成的高耐压驱动器IC与扫描电极中的一个或两个连接， EL显示器的数据电极，用于施加写入电压或调制电压的双向开关电路以每个驱动器IC和下拉公共线的上拉公共线施加一个用于极度恢复的开关，经过 薄膜EL元件已经发光，在薄膜EL显示元件上累积的电荷和用于累积引出的电荷的电容器被布置在双向开关电路中，并且调制积累电荷积累在 发光后的薄膜EL显示元件积聚在电容器上，使得调制消耗功率占据d的大部分 与常规驾驶相比，不损害传统优点的力量可以减少25％。

    Drive system for a thin-film el panel
    10.
    发明授权
    Drive system for a thin-film el panel 失效
    驱动系统为薄膜el面板

    公开(公告)号：US4866348A

    公开(公告)日：1989-09-12

    申请号：US45189

    申请日：1987-04-28

    申请人： Shigeyuki Harada ,  Toshihiro Ohba ,  Yoshiharu Kanatani ,  Hisashi Uede

    发明人： Shigeyuki Harada ,  Toshihiro Ohba ,  Yoshiharu Kanatani ,  Hisashi Uede

    IPC分类号： G09G3/30

    CPC分类号： G09G3/30 ,  G09G2310/0248 ,  G09G2310/0267 ,  G09G2310/0275 ,  G09G2320/0204

    摘要： A drive circuit for a thin-film electroluminescent (EL) matrix display panel includes an odd side N-ch high voltage MOS driver, and an odd side P-ch high voltage MOS driver connected to odd number scanning electrodes of the thin-film electroluminescent (EL) matrix display panel. Even number scanning electrodes of the thin-film electroluminescent (EL) matrix display panel are connected to an even side N-ch high voltage MOS driver and an even side P-ch high voltage MOS driver. The four MOS drivers are effectively controlled to perform an alternating current driving of the thin-film electroluminescent (EL) matrix display panel. A source level switching circuit is connected to the odd side and even side N-ch high voltage MOS drivers so as to switch the source voltage in synchronization with the field driving of the thin-film electroluminescent (EL) matrix display panel.

    摘要翻译： 用于薄膜电致发光（EL）矩阵显示面板的驱动电路包括奇数侧N沟道高电压MOS驱动器和连接到薄膜电致发光的奇数扫描电极的奇数侧P-ch高电压MOS驱动器 （EL）矩阵显示面板。 薄膜电致发光（EL）矩阵显示面板的偶数扫描电极连接到偶极N沟道高电压MOS驱动器和偶极侧P沟道高电压MOS驱动器。 有效地控制四个MOS驱动器，以进行薄膜电致发光（EL）矩阵显示面板的交流驱动。 源极电平切换电路连接到奇数侧和偶数侧N沟道高电压MOS驱动器，以便与薄膜电致发光（EL）矩阵显示面板的场驱动同步地切换源电压。