公开(公告)号：US20070080927A1

公开(公告)日：2007-04-12

申请号：US10579308

申请日：2004-11-16

申请人： Guofu Zhou ,  Johannes Van De Kamer ,  Mark Johnson

发明人： Guofu Zhou ,  Johannes Van De Kamer ,  Mark Johnson

IPC分类号： G09G3/34

CPC分类号： G09G3/344 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2320/0209

摘要： An electrophoretic display device comprising charged particles in a fluid between two electrodes. Drive means supply the electrodes with drive waveforms in order to cause the charged particles to occupy a desired optical state according to an image to be displayed. In the case where a pixel is required to remain in the same optical state during an image update sequence, at least one voltage pulse is provided at or near the end of the drive signal to compensate for the effect of crosstalk by drawing the charged particles back to the optical state in which the respective picture element is required to remain during that image update sequence.

摘要翻译： 一种电泳显示装置，其包括在两个电极之间的流体中的带电粒子。 驱动装置为电极提供驱动波形，以根据要显示的图像使带电粒子占据期望的光学状态。 在像素需要在图像更新序列期间保持相同的光学状态的情况下，在驱动信号的末端或其附近提供至少一个电压脉冲，以通过将带电粒子拉回来来补偿串扰的影响 到在该图像更新序列期间需要保留各个像素的光学状态。

公开(公告)号：US20070080926A1

公开(公告)日：2007-04-12

申请号：US10579306

申请日：2004-11-18

申请人： Guofu Zhou ,  Mark Johnson

发明人： Guofu Zhou ,  Mark Johnson

IPC分类号： G09G3/34

CPC分类号： G09G3/344 ,  G09G2310/061 ,  G09G2310/068 ,  G09G2320/02 ,  G09G2320/0209 ,  G09G2320/0257

摘要： A method and apparatus for driving an electrophoretic display device with reduced image retention. Image transitions in respect of all pixels are performed during each image update, irrespective of whether the optical state of a pixel is required to change or not. Thus, pixels without substantial optical state change between a first image update period and a subsequent image update period are forced to update during the subsequent image update period. The drive waveforms, in particular those to be applied for updating pixels without substantial optical state change, are preferably configured such that the net DC voltage is substantially zero after every single image transition.

摘要翻译： 一种用于驱动具有降低的图像保持性的电泳显示装置的方法和装置。 在每个图像更新期间执行关于所有像素的图像转换，而不管像素的光学状态是否需要改变。 因此，在随后的图像更新周期期间强制在第一图像更新周期和后续图像更新周期之间没有实质光学状态改变的像素更新。 优选地，驱动波形，特别是用于更新不具有实质光学状态变化的像素的驱动波形被配置为使得每个单个图像转换之后的净直流电压基本为零。

公开(公告)号：US20070075962A1

公开(公告)日：2007-04-05

申请号：US10571804

申请日：2004-09-15

申请人： Guofu Zhou ,  Jan Van De Kamer ,  Mark Johnson

发明人： Guofu Zhou ,  Jan Van De Kamer ,  Mark Johnson

IPC分类号： G09G3/34

CPC分类号： G09G3/344 ,  G09G3/2011 ,  G09G3/2014 ,  G09G3/2081 ,  G09G2300/08 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2310/08 ,  G09G2320/041

摘要： An display device (301) has reduced memory (314) requirements for temperature compensation data. A scaling factors (433) for various temperatures and a look-up table for a waveform which is optimized to drive the grayscale for a given display temperature are stored in memory (314). The waveform for a particular temperature of the display (301) is derived from the look-up table and scaling factors (433). At some temperatures, only certain parts of the waveform need be varied, and only these parts require accurate scaling from the look-up table.

摘要翻译： 显示装置（301）对于温度补偿数据的存储器（314）需求减少。 用于各种温度的缩放因子（433）和用于为给定显示温度驱动灰度的波形的查找表被存储在存储器（314）中。 用于显示器（301）的特定温度的波形从查找表和缩放因子（433）导出。 在某些温度下，仅波形的某些部分需要改变，只有这些部分需要从查找表进行精确的缩放。

公开(公告)号：US20070064302A1

公开(公告)日：2007-03-22

申请号：US10576319

申请日：2004-10-13

申请人： Mark Johnson ,  Lucas Schlangen ,  Patrick Baesjou ,  Guofu Zhou

发明人： Mark Johnson ,  Lucas Schlangen ,  Patrick Baesjou ,  Guofu Zhou

IPC分类号： G02B26/00

CPC分类号： G09G3/3446 ,  G02F1/167 ,  G02F2001/1678 ,  G09G2320/0252

摘要： The present invention provides a novel design for color electrophoretic displays. In the display, each pixel (200) comprises at least two sub-pixels (210, 220, 230), and each sub pixel is fitted with a color filter (211, 221, 231) and contains an electrophoretic media comprising two particle types (201, 202, 203). The color filters (211, 221, 231) in the sub-pixels of each pixel have essentially non-overlapping absorption bands, and together cover essentially all of the wavelengths over which the display is operative. Furthermore, the absorption bands of the particles in each sub-pixel (210, 220, 230) each cover a portion of the wavelengths that is not covered by the filter (211, 221, 231) in the respective sub-pixel. The wavelength bands typically correspond to different colors. Thereby each wavelength band, or color, can be emitted by more than one sub-pixel in each pixel, resulting in increased brightness. According to one particular embodiment, each pixel comprises three sub-pixels having a cyan, magenta, and yellow absorbing filter, respectively.

摘要翻译： 本发明提供了彩色电泳显示器的新颖设计。 在显示器中，每个像素（200）包括至少两个子像素（210,220,230），并且每个子像素装配有滤色器（211,221,231），并且包含包含两个粒子类型的电泳介质 （201,202,203）。 每个像素的子像素中的滤色器（211,221,231）具有基本上不重叠的吸收带，并且一起覆盖显示器可操作的基本上所有的波长。 此外，每个子像素（210,220,230）中的颗粒的吸收带各自覆盖相应子像素中未被滤光器（211,221,231）覆盖的一部分波长。 波长带通常对应于不同的颜色。 因此，每个波长带或颜色可以由每个像素中的多于一个子像素发射，导致增加的亮度。 根据一个具体实施例，每个像素分别包括具有青色，品红色和黄色吸收滤光器的三个子像素。

公开(公告)号：US20070052665A1

公开(公告)日：2007-03-08

申请号：US10557683

申请日：2004-05-17

申请人： Guofu Zhou ,  Mark Johnson

发明人： Guofu Zhou ,  Mark Johnson

IPC分类号： G09G3/34

CPC分类号： G09G3/344 ,  G09G2300/08 ,  G09G2310/06 ,  G09G2310/068 ,  G09G2320/02 ,  G09G2320/041

摘要： A display device (1) has electrophoretic particles (8, 9), a display element including electrodes (5, 6), between which a portion of the electrophoretic particles (8, 9) is present, a temperature sensor (25) and a processor (15) for supplying a driving pulse (32) to the electrodes (5, 6) to bring the display element to a predetermined black, gray or white state, corresponding to the image information to be displayed. For improved grayscale accuracy and optimal picture and text quality, the processor (15) is further arranged to supply pre-pulses (31) preceding the driving pulses (32). The energy of the pre-pulses (31) is increased with increased temperature measured by the temperature sensor (25) and is sufficient to release the electrophoretic particles at a first position near one of the two electrodes (5, 6), but too low to enable the particles to reach a second position near the other electrode (5 or 6).

摘要翻译： 显示装置（1）具有电泳粒子（8,9），包括电极（5,6）的显示元件，其间存在电泳颗粒（8,9）的一部分，温度传感器（25）和 处理器（15），用于向电极（5,6）提供驱动脉冲（32），以使显示元件达到预定的黑色，灰色或白色状态，与要显示的图像信息相对应。 为了改善灰度精度和最佳图像和文本质量，处理器（15）还被布置成提供在驱动脉冲（32）之前的预脉冲（31）。 预脉冲（31）的能量随温度传感器（25）测量的温度升高而增加，足以在两个电极（5,6）附近的第一位置释放电泳粒子，但是太低 以使颗粒能够到达另一电极（5或6）附近的第二位置。

公开(公告)号：US20070018944A1

公开(公告)日：2007-01-25

申请号：US10564418

申请日：2004-07-09

申请人： Mark Johnson ,  Rogier Cortie ,  Guofu Zhou

发明人： Mark Johnson ,  Rogier Cortie ,  Guofu Zhou

IPC分类号： G09G3/34

CPC分类号： G09G3/344 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2310/068

摘要： This invention relates to an electrophoretic display panel (1), for displaying a picture corresponding to image information, comprising a plurality of pixels (2), each containing an amount of an electrophoretic material comprising a first and a second type of particles (6, 7), having mutually different charges, being dispersed in a fluid, a first and a second electrode (8, 9) associated with each pixel (4) for receiving a potential difference as defined by an update drive waveform; and drive means (10), for controlling said update drive waveform of each pixel (4); said update drive waveform comprising a reset portion (R), during which a reset signal is applied over the pixel, and subsequently a driving portion (D), during which a picture potential difference is applied over the pixel for enabling the particles (6, 7) to occupy the position corresponding to the image information. The invention is characterised in that said reset portion (R) of the update drive waveform is configured so that the first and second types of particles (6,7) are brought in close proximity with each other during said reset portion (R) of the update waveform.

摘要翻译： 本发明涉及一种用于显示与图像信息相对应的图像的电泳显示面板（1），其包括多个像素（2），每个像素包含一定量的电泳材料，其包含第一和第二类型的颗粒（6， 7），具有相互不同的电荷，分散在流体中，与每个像素（4）相关联的第一和第二电极（8,9），用于接收由更新驱动波形定义的电位差; 和驱动装置（10），用于控制每个像素（4）的所述更新驱动波形; 所述更新驱动波形包括复位部分（R），在所述复位部分（R）期间，复位信号施加在所述像素上，以及随后的驱动部分（D），在所述驱动部分（D）期间，在所述像素上施加图像电位差以使所述粒子（6， 7）占据对应于图像信息的位置。 本发明的特征在于，所述更新驱动波形的所述复位部分（R）被配置为使得所述更新驱动波形的所述复位部分（R）在所述复位部分（R）期间使所述第一和第二类型的粒子（6,7）彼此靠近 更新波形。

公开(公告)号：US20060279526A1

公开(公告)日：2006-12-14

申请号：US10564383

申请日：2004-07-06

申请人： Guofu Zhou ,  Masaru Yasui ,  Mark Johnson

发明人： Guofu Zhou ,  Masaru Yasui ,  Mark Johnson

IPC分类号： G09G3/34

CPC分类号： G09G3/344 ,  G09G3/2022 ,  G09G2300/08 ,  G09G2310/0275 ,  G09G2310/065 ,  G09G2330/021

摘要： Electrophoretic display units (1,100) are provided with switching circuits (50) to reduce the energy necessary for supplying data pulses (DP1, DP2) to pixels (11) via a data electrode (31,32,33,34). This energy is proportional to a differential voltage to be realised and to a capacitance (13) to be charged or discharged, which is formed by a combination of a capacitance of the pixel (11) and a capacitance of the active matrix. Due to this capacitance of the active matrix being much larger, a relatively large amount of energy is necessary. The switching circuit (50) couples the data electrode (31,32,33,34) to a voltage reference source (REF) like ground between two selection pulses (SP1, SP2) to be supplied sequentially to two respective pixels (11) coupled to the same data electrode (31,32,33,34). This reduces the amount of discharging to be realized by the data drivers (3). As a result, the maximum energy necessary is reduced. To reduce the power consumption of the entire electrophoretic display unit (1,100), this should be done preferably for data pulses (DPI, DP2) having amplitudes with opposite polarity only.

摘要翻译： 电泳显示单元（1,100）设置有开关电路（50），以减少通过数据电极（31,32,33,34）向像素（11）提供数据脉冲（DP 1，DP 2）所需的能量。 该能量与要实现的差分电压和通过像素（11）的电容和有源矩阵的电容的组合形成的要充电或放电的电容（13）成比例。 由于有源矩阵的这种电容大得多，所以需要相对大量的能量。 开关电路（50）将数据电极（31,32,33,34）耦合到两个选择脉冲（SP 1，SP 2）之间的类似接地的电压参考源（REF），以顺序地提供给两个相应的像素（11 ）耦合到相同的数据电极（31,32,33,34）。 这减少了由数据驱动器（3）实现的放电量。 结果，减少了所需的最大能量。 为了降低整个电泳显示单元（1,100）的功耗，应优先对具有相反极性的幅度的数据脉冲（DPI，DP 2）进行优化。

公开(公告)号：US20060262081A1

公开(公告)日：2006-11-23

申请号：US10555265

申请日：2004-05-03

申请人： Guofu Zhou ,  Peter Duine ,  Rogier Hendrikus Cortie ,  Mark Johnson

发明人： Guofu Zhou ,  Peter Duine ,  Rogier Hendrikus Cortie ,  Mark Johnson

IPC分类号： G09G3/34

CPC分类号： G09G3/344 ,  G09G2300/08 ,  G09G2300/0842 ,  G09G2310/0254 ,  G09G2310/06 ,  G09G2310/068 ,  G09G2320/0204 ,  G09G2320/0247

摘要： A display device comprises electrophoretic particles, a display element comprising a pixel electrode and a counter electrode between which a portion of the electrophoretic particles are present and a controller for supplying a drive signal to the electrodes to bring the display element in a predetermined black or white state, corresponding to the image information to be displayed. In order to improve the refresh time of the display, the controller is further arranged for supplying a preset signal preceding the drive signal comprising a preset pulse having an energy sufficient to release the electrophoretic particles at a first position near one of the two electrodes corresponding to a black state, but too low to enable the particles to reach a second position near the other electrode corresponding to a white state. The duration of the preset pulses is less than 19 msec, preferably between 1 and 10 msec. Setting the duration of the preset pulses to less than 19 msec reduced visible flicker F.

摘要翻译： 显示装置包括电泳粒子，显示元件包括像素电极和相对电极，在该对电极之间存在电泳颗粒的一部分，以及用于向电极提供驱动信号以使显示元件处于预定的黑色或白色的控制器 状态，对应于要显示的图像信息。 为了提高显示器的刷新时间，控制器进一步被布置为提供驱动信号之前的预设信号，该预设信号包括具有足够的能量的预置脉冲，以将电泳颗粒释放在对应于两个电极的两个电极之一附近的第一位置 黑色状态，但是太低，不能使颗粒到达对应于白色状态的另一个电极附近的第二位置。 预设脉冲的持续时间小于19毫秒，优选在1和10毫秒之间。 将预设脉冲的持续时间设置为小于19毫秒，减少可见闪烁F.

公开(公告)号：US20060256421A1

公开(公告)日：2006-11-16

申请号：US10554011

申请日：2004-04-22

申请人： Volker Schoellmann ,  Guofu Zhou ,  Mark Johnson

发明人： Volker Schoellmann ,  Guofu Zhou ,  Mark Johnson

IPC分类号： G02B26/00

CPC分类号： G02F1/167

摘要： The electrophoretic display device has a plurality of pixels with an electrophoretic medium (7). Each pixel is divided into a first and a second sub-pixel (1; 2). Each pixel is provided with a common electrode (3) extending over the first and second subpixel. The first sub-pixel is provided with a first sub-pixel electrode (11) and the second sub-pixel is provided with a second sub-pixel electrode (12). Preferably, the first sub-pixel is provided with a first light absorbing layer (21) and the second sub-pixel is provided with a second light absorbing layer (22), while the first and second light absorbing layer are provided at opposite sites of the pixels. Preferably, the electrophoretic medium comprises micro-encapsulated electrophoretic ink. Preferably, the ink comprises two types of particles (31; 32) always staying in the optical path of the pixels. According to the invention a doublesided display device is provided with a single electrophoretic medium.

摘要翻译： 电泳显示装置具有多个具有电泳介质（7）的像素。 每个像素被分成第一和第二子像素（1; 2）。 每个像素设置有在第一和第二子像素上延伸的公共电极（3）。 第一子像素设置有第一子像素电极（11），第二子像素设置有第二子像素电极（12）。 优选地，第一子像素设置有第一光吸收层（21），并且第二子像素设置有第二光吸收层（22），而第一和第二光吸收层设置在第二光吸收层 像素。 优选地，电泳介质包括微胶囊化电泳墨水。 优选地，油墨包括总是停留在像素的光路中的两种类型的颗粒（31; 32）。 根据本发明，双面显示装置设置有单个电泳介质。

公开(公告)号：US20060232547A1

公开(公告)日：2006-10-19

申请号：US10564381

申请日：2004-07-07

申请人： Mark Johnson ,  Guofu Zhou ,  Johannes Van De Kamer

发明人： Mark Johnson ,  Guofu Zhou ,  Johannes Van De Kamer

IPC分类号： G09G3/34

CPC分类号： G09G3/344 ,  G09G2310/04 ,  G09G2310/061 ,  G09G2310/065 ,  G09G2320/0204 ,  G09G2320/0257 ,  G09G2320/0285 ,  G09G2320/103 ,  G09G2330/021

摘要： This invention relates to an electrophoretic display panel (1), for displaying an image corresponding to image information, comprising a plurality of pixels (4), each containing an amount of an electrophoretic material, an electrode arrangement (8, 9) associated with each pixel (4) for receiving a potential difference as defined by an update drive waveform (12); and pixel drive means (10), for controlling said update drive waveform (12) of each pixel (4). The display panel further comprises an image information analyser (11) arranged to analyse the image information for a current image frame (13) to be displayed by the display panel with the image information of a previous image frame (14), the image information analyser (11) being arranged to control said pixel drive means (10) so as to, at least in a portion of the display, only update a subgroup of pixels (4) which, as analysed by the image information analyser (11) is arranged to display a greyscale in the current image frame (13) which differs from the greyscale displayed in the previous image frame (14).

摘要翻译： 本发明涉及一种用于显示对应于图像信息的图像的电泳显示面板（1），其包括多个像素（4），每个像素包含一定量的电泳材料，与每个像素相关联的电极布置（8,9） 像素（4），用于接收由更新驱动波形（12）定义的电位差; 以及用于控制每个像素（4）的所述更新驱动波形（12）的像素驱动装置（10）。 显示面板还包括图像信息分析器（11），其被配置为分析由显示面板显示的当前图像帧（13）的图像信息，其具有先前图像帧（14）的图像信息，图像信息分析器 （11）被布置成控制所述像素驱动装置（10），使得至少在所述显示器的一部分中仅更新像素（4）的子组，所述像素组由所述图像信息分析器（11）被布置 以在当前图像帧（13）中显示与先前图像帧（14）中显示的灰度不同的灰度。