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公开(公告)号：US5309150A
公开(公告)日：1994-05-03
申请号：US457509
申请日：1989-12-27
CPC分类号： H04N3/14 , G09G3/30 , H04N3/127 , G09G2310/027 , G09G2330/021
摘要： In accordance with the invention, gradation display is performed for each picture element in capacitive display apparatuses such as EL display apparatus by means of pulse width modulation. In doing so, pulse duration of the voltage applied to one group of electrodes among the a plurality of electrodes arranged in matrix is so set as to span over two scanning periods, during which another group of electrodes which are grouped into pairs each of two adjacent lines are scanned successively. This reduces the number of drive voltage charge and discharge cycles. Consequently power consumption of the display apparatus of PWM system can be controlled to a low level.
摘要翻译： 根据本发明，通过脉冲宽度调制对诸如EL显示装置的电容显示装置中的每个像素执行灰度显示。 在这样做时，施加到以矩阵排列的多个电极中的一组电极的电压的脉冲持续时间被设置为跨越两个扫描周期，在两个扫描周期期间，分成两组的另一组电极 线连续扫描。 这样可以减少驱动电压的充放电次数。 因此，PWM系统的显示装置的功率消耗可以被控制到低水平。
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公开(公告)号：US6127993A
公开(公告)日：2000-10-03
申请号：US860254
申请日：1992-03-31
CPC分类号： G09G3/30 , H04N3/127 , H04N3/14 , G09G2310/027
摘要： In a display device such as a thin-film EL display device, etc. formed with a dielectric layer disposed between a plurality of scanning side electrodes and a plurality of data side electrodes in the direction for them intersecting to each other, a modulation voltage, varied according to gradation display data is applied to the data side electrodes, and a positive or negative writing voltage is applied to the scanning side electrodes in a line order for a gradation display different in brightness. Binary coded signals corresponding to each gradation of a gradation display are used as the gradation display data. The logical value of the binary coded signal is inverted according to the polarity of the writing voltage. Thus, a common gradation display can be performed from one binary coded signal for both the negative driving that applies a negative writing voltage and the positive driving that applies a positive writing voltage. As a result, by only by adding a data conversion circuit for inverting a binary coded signal, the function that converts the correspondence relation between the gradation to be displayed and the gradation display data depending on the negative driving or positive driving can be incorporated.
摘要翻译： 在诸如薄膜EL显示装置等的显示装置中，形成有在彼此相交的方向上设置在多个扫描侧电极和多个数据侧电极之间的电介质层的调制电压， 根据灰度显示数据而变化的数据被施加到数据侧电极，并且以与亮度不同的灰度显示的行顺序向扫描侧电极施加正或负写入电压。 使用与灰度显示的各灰度对应的二进制编码信号作为灰度显示数据。 二进制编码信号的逻辑值根据写入电压的极性反转。 因此，对于施加负写入电压的负驱动和施加正写入电压的正驱动，可以从一个二进制编码信号执行公共灰度显示。 结果，通过仅添加用于反转二进制编码信号的数据转换电路，可以并入根据负驱动或正驱动转换要显示的灰度与灰度显示数据之间的对应关系的功能。
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公开(公告)号：US4949019A
公开(公告)日：1990-08-14
申请号：US264085
申请日：1988-10-28
CPC分类号： G09G3/006
摘要： An aging drive method for a thin film EL panel includes the performing a preparatory step of short-circuiting all transparent electrodes by a first connecting line, short-circuiting every other metal electrodes by a second connecting line and short-circuiting the other metal electrodes by a third connecting line. Thereafter four fields are repeatedly periodically executed for a specified period of time to thereby cause all picture elements of the panel to luminesce for aging. Each of the four fields includes a first step of applying a first voltage across the first and second connecting lines and across the first and third connecting lines to charge all the picture elements. Further a second step is included of applying a second voltage across the second and third connecting lines while holding the transparent electrodes in a floating state. This causes luminescence of the picture elements of the metal electrodes short-circuited by the second or third connecting line, with the voltage resulting from the charge on the picture elements stored in the first step and with the second voltage. The four fields are different from one another in the combination of the polarities of the first and second voltages.
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公开(公告)号：US4935671A
公开(公告)日：1990-06-19
申请号：US229751
申请日：1988-08-08
申请人： Shigeyuki Harada , Kinichi Isaka , Toshihiro Ohba , Masashi Kawaguchi , Hiroshi Kishishita , Yoshiharu Kanatani , Hisashi Uede
发明人： Shigeyuki Harada , Kinichi Isaka , Toshihiro Ohba , Masashi Kawaguchi , Hiroshi Kishishita , Yoshiharu Kanatani , Hisashi Uede
IPC分类号： G09G3/30
CPC分类号： G09G3/30 , G09G2310/0267 , G09G2310/0275
摘要： When driving a thin-film EL display panel having groups of two electrodes on opposing sides of a thin-film EL layer, a voltage is applied so that the polarity of the AC pulse applied to the intersection (picture element) of opposing electrodes is the reverse of the polarity of the AC pulse applied simultaneously or nearly simultaneously to adjacent or nearly adjacent picture elements. This drive method avoids flicker caused by differing luminance intensities resulting from alternating polarity in EL matrix-type displays.
摘要翻译： 当在薄膜EL层的相对侧驱动具有两个电极组的薄膜EL显示面板时，施加电压，使得施加到相对电极的交点（像素）的交流脉冲的极性为 同时或几乎同时施加到相邻或几乎相邻的图像元件的AC脉冲的极性的反向。 该驱动方法避免了由EL矩阵型显示器中的交替极性引起的不同亮度强度引起的闪烁。
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公开(公告)号：US5325107A
公开(公告)日：1994-06-28
申请号：US68300
申请日：1993-05-28
申请人： Ikuo Ogawa , Akio Inohara , Toshihiro Ohba , Hiroshi Kishishita , Hisashi Uede
发明人： Ikuo Ogawa , Akio Inohara , Toshihiro Ohba , Hiroshi Kishishita , Hisashi Uede
CPC分类号： H04N3/127 , G09G3/2014 , G09G3/28 , G09G3/30 , G09G2310/0267 , G09G2310/066
摘要： A display device, such as thin film EL display device, is formed by interposing a dielectric layer between a plurality of scanning electrodes and a plurality of data electrodes which are arranged at right angles. Modulation voltage is varied in accordance to the display data, and is applied to the data electrodes. Further, a writing voltage is applied to the scanning electrodes in sequential line order, to thereby perform gradation display. Further, the writing voltage includes a ramp voltage, which varies with time. Thus, the peak of the current flowing through the luminescent layer of the picture element, as a current contributing to the luminescence, is suppressed to a low level. contributing to the luminescence, is suppressed to a low level. Accordingly, the energization period of the current is also elongated. Thus gradation display over multiple levels is made possible and a stable display of different gradation levels is enabled.
摘要翻译： 诸如薄膜EL显示装置的显示装置通过在多个扫描电极和直角排列的多个数据电极之间插入介电层而形成。 调制电压根据显示数据而变化，并被施加到数据电极。 此外，以顺序的行顺序对扫描电极施加写入电压，从而进行灰度显示。 此外，写入电压包括随时间变化的斜坡电压。 因此，作为有助于发光的电流，流过图像元件的发光层的电流的峰值被抑制到低水平。 有助于发光，被抑制到低水平。 因此，电流的通电时间也延长。 因此，可以实现多级的灰度显示，并且能够实现不同灰度级的稳定显示。
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公开(公告)号：US5311169A
公开(公告)日：1994-05-10
申请号：US735763
申请日：1991-07-26
申请人： Shuji Inada , Ikuo Ogawa , Toshihiro Ohba , Hiroshi Kishishita , Hisashi Uede
发明人： Shuji Inada , Ikuo Ogawa , Toshihiro Ohba , Hiroshi Kishishita , Hisashi Uede
CPC分类号： H04N3/127 , G09G3/2014 , G09G3/30 , H04N3/14 , G09G2310/027 , G09G2310/066 , G09G2320/0223 , G09G3/2011
摘要： This invention relates to gradation display by a pulse width control method (PWM method) in every pixel in a capacitive display apparatus such as a liquid crystal display apparatus. The driving voltage applied to the electrodes is varied slowly, and the number of gradations of gradation display by the PWM method is increased. Since the capacitive display apparatus is used, for each electrode further from the drive circuit, the driving pulse is more influenced and its persisting duration is extended. As a result, even in identical gradation data, uneven colors may occur. The pulse width applied to the electrodes is gradually decreased as scanning of the electrodes sequentially occurs. Therefore, the brightness of the capacitive display apparatus may be made uniform over the entire screen surface.
摘要翻译： 本发明涉及通过液晶显示装置等电容显示装置的各像素中的脉冲宽度控制方法（PWM方式）进行灰度显示。 施加到电极的驱动电压变化缓慢，并且通过PWM方法的灰度显示的灰度级数增加。 由于使用了电容显示装置，所以对驱动电路进一步的每个电极，驱动脉冲的影响更大，持续时间延长。 结果，即使在相同的灰度数据中，也可能发生不均匀的颜色。 随着电极的扫描依次发生，施加到电极的脉冲宽度逐渐减小。 因此，电容显示装置的亮度可以在整个屏幕表面上均匀。
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7.发明授权
公开(公告)号：US4999618A
公开(公告)日：1991-03-12
申请号：US208045
申请日：1988-06-17
申请人： Shuji Inada , Toshihiro Ohba , Hiroshi Kishishita , Hisashi Uede
发明人： Shuji Inada , Toshihiro Ohba , Hiroshi Kishishita , Hisashi Uede
IPC分类号： G09G3/30
CPC分类号： G09G3/30 , G09G2310/0267 , G09G2310/0275
摘要： A driving method of a thin film EL display unit and a driving circuit thereof comprising a thin film EL panel constituted by installing an EL layer between scanning-side electrodes and data-side electrodes and driver ICs which are connected respectively to the scanning-side electrodes and the data-side electrodes, wherein, on a drive which applies a write voltage positive to the data-side electrodes to the scanning-side electrodes, the scanning-side electrodes are raised once to a predetermined potential or higher, and thereafter the positive write voltage is applied thereto, and on a drive which applies a write voltage negative to the data-side electrodes to the scanning-side electrodes, the scanning-side electrodes are reduced once to a predetermined potential or lower, and thereafter the negative write voltage is applied thereto, which can reduce a maximum voltage applied to the scanning-side driver ICs.
摘要翻译： 薄膜EL显示单元及其驱动电路的驱动方法包括通过在扫描侧电极和数据侧电极之间安装EL层而构成的薄膜EL面板和分别连接到扫描侧电极的驱动器IC 和数据侧电极，其中，在对扫描侧电极施加向数据侧电极施加正电压写入电压的驱动器上，扫描侧电极升高一次至预定电位以上，之后为正 对其施加写入电压，并且在向扫描侧电极施加向数据侧电极施加负电压的驱动器上，扫描侧电极减少一次至预定电位或更低，然后将负写入电压 可以降低施加到扫描侧驱动器IC的最大电压。
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8.发明授权
公开(公告)号：US4951041A
公开(公告)日：1990-08-21
申请号：US215772
申请日：1988-07-06
申请人： Shuji Inada , Toshihiro Ohba , Hiroshi Kishishita , Hisashi Uede
发明人： Shuji Inada , Toshihiro Ohba , Hiroshi Kishishita , Hisashi Uede
IPC分类号： G09G3/30
CPC分类号： G09G3/30 , G09G2310/0267 , G09G2310/0275
摘要： A driving method is described for thin film EL display devices having an EL layer interposed between scanning side electrodes and data side electrodes which are intersected to each other. The method comprises displaying frames formed by a line sequential drive in which voltage corresponding to display data is applied to the data side electrodes. Concurrently, write pulses which are negative and positive with respect to the data side electrodes are applied to the scanning side electrodes. Further the write pulses which are positive or negative with respect to the data side electrodes are applied to the scanning electrodes. The number of light emitting picture elements of the scanning side electrodes is previously detected from display data and the width of the write pulses, which are at least one of positive or negative is controlled in proportion to the number of the light emitting picture elements. Thus, the brightness of the light emitting picture elements is uniform due to the driving circuit thereof.
摘要翻译： 对于具有夹在扫描侧电极和彼此相交的数据侧电极之间的EL层的薄膜EL显示装置，描述了驱动方法。 该方法包括显示由行顺序驱动形成的帧，其中对应于显示数据的电压被施加到数据侧电极。 并行地，对扫描侧电极施加相对于数据侧电极为负的正脉冲。 此外，相对于数据侧电极为正或负的写脉冲被施加到扫描电极。 从显示数据预先检测扫描侧电极的发光像素的数量，并且与发光像素的数量成比例地控制至少一个正或负的写入脉冲的宽度。 因此，由于其驱动电路，发光像素的亮度是均匀的。
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公开(公告)号：US5233340A
公开(公告)日：1993-08-03
申请号：US900754
申请日：1992-06-19
申请人： Hisashi Yamaguchi , Atsushi Sakamoto , Kazuo Shoji , Kioichi Yamamoto , Toshihiro Ohba , Hisashi Uede
发明人： Hisashi Yamaguchi , Atsushi Sakamoto , Kazuo Shoji , Kioichi Yamamoto , Toshihiro Ohba , Hisashi Uede
IPC分类号： G09G3/30
CPC分类号： G09G3/30
摘要： A method of driving a display device with a plurality of scanning side electrodes and a plurality of data side electrodes which are disposed in directions intersecting each other, and a dielectric layer interposed between the scanning side electrodes and the data side electrodes, and including steps of applying modulation voltages corresponding to display data to the data side electrodes, and also applying writing voltages of positive or negative polarity to the scanning side electrodes through line sequence, so as to cause picture elements composed of the dielectric layer to emit light. The driving method further includes steps of thinning out the display data, and applying a plurality of kinds of modulation voltages different in amplitude according to each frame, so as to cause the picture elements to effect gradation display of different brightness in multi-stages.
摘要翻译： 一种驱动显示装置的方法，所述显示装置具有沿彼此交叉的方向设置的多个扫描侧电极和多个数据侧电极以及介于所述扫描侧电极和所述数据侧电极之间的电介质层，并且包括以下步骤： 将对应于显示数据的调制电压施加到数据侧电极，并且通过线序列向扫描侧电极施加正极性或负极性的写入电压，以使得由电介质层组成的像素发光。 驱动方法还包括以下步骤：根据每个帧稀疏显示数据和应用幅度不同的多种调制电压，以使得像素在多级中实现不同亮度的灰度显示。
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10.发明授权
公开(公告)号：US5206631A
公开(公告)日：1993-04-27
申请号：US688144
申请日：1991-04-22
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.
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