CN100557676C - Method of compensating temperature dependence of driving schemes for electrophoretic displays - Google Patents

Method of compensating temperature dependence of driving schemes for electrophoretic displays Download PDF

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CN100557676C
CN100557676C CNB2004800260268A CN200480026026A CN100557676C CN 100557676 C CN100557676 C CN 100557676C CN B2004800260268 A CNB2004800260268 A CN B2004800260268A CN 200480026026 A CN200480026026 A CN 200480026026A CN 100557676 C CN100557676 C CN 100557676C
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temperature
scaling
duration
function
bi
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CN1849644A (en
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G·周
R·H·M·科蒂
M·T·约翰逊
J·范德卡默
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皇家飞利浦电子股份有限公司
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Abstract

通过提供独立的比例换算函数(SF1,SF2)用于根据温度(335)对驱动波形中复位脉冲(R)的持续时间和驱动脉冲(D)的持续时间进行比例换算,一个图像在如电泳显示器之类的双稳态显示器(310)上得以更新。 By providing separate scaling function (SF1, SF2) for the temperature (335) for the duration of the drive waveform of the reset pulse (R) and the duration of the driving pulse (D), according to scaling, in the electrophoretic display one image It is updated based on the bi-stable display (310). 优选地,驱动脉冲(D)的比例换算因子(SF1)随变化温度具有的斜率的绝对值明显大于复位脉冲(R)的比例换算因子(SF2)的斜率的绝对值,而两个比例换算因子都随着温度的下降而增大。 The ratio of the absolute value of the absolute value of the ratio Preferably, the drive pulse (D) of the scaling factor (SF1 of) having a function of temperature is significantly greater than the slope of the reset pulse (R) in terms of slope factor (SF2) of, and the two scaling factors It has increased as the temperature dropped. 图像更新时间(IUT)在低温下明显缩短,而整个温度范围内IUT的变化范围也减小。 The image update time (IUT) significantly reduced at low temperatures, and over temperature range IUT is also reduced. 比例换算函数(SF3,SF4)还用来对帮助复位脉冲(H)的持续时间和/或一个或多个摇动脉冲(SH1,SH2)的持续时间进行比例换算。 Scaling function (SF3, SF4) is also used to help reset pulse (H), the duration and / or duration of one or more shaking pulses (SH1, SH2) is scaling.

Description

补偿电泳显示器驱动方案的温度依赖性的方法本发明总的涉及诸如电子书和电子报刊之类的电子阅读装置,尤其涉及补偿这种装置中驱动显示器时的温度依赖性的方法和装置。 Compensating the temperature dependency of the electrophoretic display driving method of the present embodiment of the invention, such as an electronic book and an electronic reading device like an electronic newspaper of the total relates particularly to a method and apparatus for compensating the temperature dependency of the time of driving such a display apparatus.

近年来的技术进步提供了一些"用户友好"电子阅读装置,如开启了许多机会的电子书。 Recent technological advances have provided some "user-friendly" electronic reading devices such as e-books opens up many opportunities. 例如,电泳显示器特别有前途。 For example, electrophoretic displays particularly promising. 这种显示器具有固有存储器性能,并且能够将一幅图像保持相当长的时间而无功耗。 Such displays have intrinsic memory properties, and an image can be maintained for a long time without power consumption. 仅当显示器需要刷新或更新新信息时才有功耗。 Only when the display needs to be refreshed or updated with new information have power. 因此,这样一种显示器中的功耗是很低的,其适用于像电子书和电子报刊之类的便携式电子阅读装置。 Thus, such a display power consumption is very low, suitable for a portable electronic image electronic newspaper and an electronic book reading device or the like. 电泳指的带电电荷在所施加的电场中的运动。 Electrophoresis refers to the movement of charge in the charging of the applied electric field. 当在液体中发生电泳时,粒子的运动速度主要由粒子所经受的粘滞力、其电荷(永久的或感应的)、液体的介电性能以及所施加场的幅度来决定。 When electrophoresis occurs in a liquid, the particle velocity is mainly viscous forces experienced by the particles, their charge (either permanent or induced), the dielectric properties of the liquid and the magnitude of the applied field is determined. 电泳显示器通常是一种双稳态显示器,而双稳态显示器是一种大体保持图像而在图像更新后没有功耗的显示器。 Electrophoretic display typically a bi-stable display, a bistable display the image without substantially holding power after an image update the display.

例如,公开曰为1999年4月9曰由E Ink Corporation Cambridge, Massachusetts, US申请的标题为"Full Color Reflective Display With Multichromatic Sub—Pixels"的国际专利申i青W099/53373中揭示了这样一种显示器装置。 For example, said publicly for the April 9, 1999, saying the E Ink Corporation Cambridge, Massachusetts, US apply for the title of "Full Color Reflective Display With Multichromatic Sub-Pixels" international patent application W099 in blue i / 53373 disclosed a The display device. W099/53373中讨论了一种具有两个衬底的电子油墨显示器。 In W099 / 53373 discusses an electronic ink display having two substrates. 其中的一个是透明的,而另一个配备有排列成行、 列的电极。 One of which is transparent, arranged in rows while the other is equipped with an electrode column. 显示元素或像素与行电极和列电极的交点相关。 Display elements or pixels associated with the intersection of the row and column electrodes. 采用薄膜晶体管(TFT)将显示元素与列电极耦合起来,而薄膜晶体管的栅极与行电极耦合。 A thin film transistor (TFT) display element will be coupled to column electrodes together, and coupled to a gate electrode of the thin film transistor row. 这种排列的显示元素、TFT晶体管和行、列电极一起形成了一个有源阵列。 This arrangement of display elements, the formation of an active matrix TFT transistors and row and column electrodes together. 另外,显示元素包含像素电极。 Further, the display element comprises a pixel electrode. 行驱动器选择一行显示元素,列驱动器或源驱动器通过列电极和TFT晶体管向所选择的显示元素行来提供数据信号。 A row driver selects a row of display elements, the column driver or the source driver to the column electrodes and the TFT transistors provide data signals to the display elements of the selected row through. 该数据信号对应于待显示的图形数据, 如文字或图像。 The data signals correspond to graphic data to be displayed, such as text or images.

电子油墨被提供在透明衬底上的像素电极和公共电极之间。 Electronic ink is provided between the pixel electrode on the transparent substrate and the common electrode. 电子油墨包含多个直径约为10到50微米的微嚢。 A plurality of electronic ink comprising a diameter of about 10 to 50 microns in Nang. 在一种结构中,每一微嚢具有悬浮在液体载体介质或液体中的带正电的白颗粒和带负电的黑颗粒。 In one configuration, each having a micro Nang suspended in a liquid carrier or liquid medium positively charged white particles and negatively charged black particles. 当把正电压施加到像素电极上时,白颗粒移动到指向透明衬底的微嚢一側,那么观察者将看到白色的显示元素。 When the positive voltage is applied to the pixel electrode, the white particles move to the transparent substrate side toward the micro Nang, then the viewer will see a white display element. 同时,黑颗粒移动到位于孩史嚢另一侧的像素电极上,此时观察者看不到。 Meanwhile, the black particles move to the pixel electrode located on the other side of the child Nang history, in which case the viewer can not see. 通过向像素电极施加负电压,黑颗粒移动到指向透明衬底的微嚢一側的公共电极上, 相对于观察者来说,显示元素看上去是暗色。 By the negative voltage, the black particles move to the pixel electrode is applied onto a transparent substrate directed micro Nang common electrode side, relative to the observer, the display element appears dark. 同时,白颗粒移动到微嚢另一側的像素电极上,此时,观察者看不到。 Meanwhile, the white particles move to the pixel electrode on the other side of the micro Nang, this time, the viewer can not see. 去掉电压以后,显示器装置保持在所获得的状态下,因此呈现双稳态特征。 After the voltage is removed, the display device remains in the acquired state and thus exhibits a bi-stable characteristic. 在另一种结构中,颗粒是提供在经染色的液体中的。 In another configuration, the particles are provided in a dyed liquid through. 例如,可以在白液体中提供黑颗粒,也可以在黑液体中提供白颗粒。 For example, black particles may be provided in a white liquid, it may also be provided in the black and white particles in a liquid. 也可以在不同着色的液体中提供其它着色的颗粒,例如在蓝色液体中提供白颗粒。 Other particles may also be provided in the liquid colored differently colored, for example white particles in blue liquid provided in.

在介质中也可以使用其它液体如空气(air),这时,带电黑粒子和带电白粒子在电场中到处移动(参见如Bridgestone SID2003-Symposium on Information Displays, May 18-23, —digest 20. 3)也可以采用经着色的粒子。 Other liquids may also be used, such as air (air) in the medium, then charged white particles and charged black particles move (see, e.g., Bridgestone SID2003-Symposium on Information Displays, May 18-23 in the electric field everywhere, -digest 20. 3 ) colored particles may also be employed.

为了形成电子显示器,可以把电子油墨印刷到层叠在一层电路上的一片塑料膜上。 To form an electronic display, the electronic ink can be printed onto a plastic film laminated on one circuit. 该电路形成一种可以接着由显示驱动器来控制的像素图案。 The circuit may then form a pixel pattern by the display driver controlled. 由于微嚢是悬浮在液体载体介质中的,因此可以采用现有的丝网印刷技术把它们印刷到实际上任何一种表面上,如玻璃、塑料、 织物甚至纸上。 Since the micro Nang is suspended in a liquid carrier medium, it is possible to use a conventional screen printing techniques to print them on virtually any surface, such as glass, plastic, fabric and even paper. 另外,柔软片状物的使用使得可以将电子阅读装置设计成其外观近似为传统的书籍。 In addition, the flexible sheet may be such that the electronic reading device is designed to approximate the appearance of a conventional book.

但是,采用对温度变化的影响进行补偿的当前显示驱动方案,在低温下,会使图像质量大大下降,更新时间大大减小。 However, with the influence of temperature change compensating current display driving scheme, at a low temperature, causes the image quality greatly decreased, the update time is greatly reduced.

本发明通过提供一种补偿驱动电泳显示器或其它双稳态显示器中的温度影响的方法和装置来解决了这一问题,并同时改善了图像质量和更l斤时间。 The method and apparatus of the present invention for driving an electrophoretic display or other temperature effects of the bi-stable display by providing a compensation solves this problem, and also to improve the image quality and more time to l kg.

根据本发明的一个特定方面, 一种驱动双稳态显示器的方法包括确定与双稳态显示器相关的温度、根据所确定的温度和第一比例换算(scaling)函数确定向至少一部分的双稳态显示器施加复位脉沖的持续时间,以及根据所确定的温度和不同于第一比例换算函数的第二比例换算函数来确定至少一部分的双稳态显示器上施加的驱动脉冲的持续时间。 According to a particular aspect of the present invention, a method of driving a bi-stable display comprises determining a temperature associated with the bi-stable display, at least a portion of the bistable determined according to the determined temperature and a first scaling (Scaling) function the duration of the reset pulse is applied to a display, and a duration determined according to a second and the ratio of the determined temperature different than the first scaling function scaling function of the drive pulse applied on at least a portion of the bi-stable display.

按照本发明的另一个方面,其它部分的驱动波形,如复位脉冲之前的摇动脉沖和其它帮助复位脉冲,可以使用其它的比例换算函数, 而这些其它的比例换算函数是不同于第一、第二比例换算函数的。 According to another aspect of the invention, other parts of the drive waveform, such as shaking pulse preceding the reset pulse and the reset pulse other assistance, may use other scaling function, the scaling function of these other is different from the first, two scaling function.

还提供了相关的电子阅读装置和程序存储装置。 Also provides related electronic reading device and program storage device.

图中:图1示意示出电子阅读装置的一部分显示屏实施例的前视图;图2示意示出图1中沿2-2线截得的截面图;图3示意示出整个电子阅读装置;图4示意示出两个具有各自显示区的显示屏;图5示出一例采用轨道稳定驱动的波形,其中的波形包括第一摇动脉冲、复位脉沖和驱动脉冲;图6示出一例采用轨道稳定驱动的波形,其中的波形包括第一摇动脉冲、复位脉冲、第二摇动脉沖和驱动脉沖;图7示出一例采用轨道稳定驱动的波形,其中的波形包括第一摇动脉冲、极性与复位脉沖相反的帮助复位脉冲、复位脉冲、第二摇动脉冲和驱动脉沖;图8示出采用单个比例换算函数的总图像更新时间的比例换算函数;图9示出用于驱动脉冲和复位脉冲的单独的比例换算函数;图10示出总图像更新时间(IUT)随温度的变化,它将采用单个比例换算函数的IUT与采用双比例换算函 The drawings: FIG 1 schematically shows a front view of an embodiment of a portion of a display screen of an electronic reading device; FIG. 2 schematically shows a sectional view along line 2-2 in FIG. 1 is intercepted; FIG. 3 schematically shows the entire electronic reading device; FIG 4 schematically shows a display screen having respective two regions; FIG. 5 shows an example of using rail-stabilized driving waveform, wherein the waveform comprises a first shaking pulse, reset pulse and the drive pulse; FIG. 6 shows an example of using rail-stabilized drive waveform, wherein the waveform comprises a first shaking pulse, reset pulse, a second shaking pulse and the drive pulse; FIG. 7 shows an example of using rail-stabilized driving waveform, wherein the waveform comprises a first shaking pulses, the polarity of the reset pulses of opposite help reset pulse, reset pulse and the second driving pulse shaking pulses; FIG. 8 shows the proportion of the total image update time using a single scaling function scaling function; FIG. 9 shows a single pulse and the reset pulse for driving the the scaling function; FIG. 10 shows the total image update time (IUT) changes with temperature, it uses a single IUT scaling function scaling function with dual 数的IUT进行比较;以及图ll示出用于复位脉沖、帮助复位脉沖、摇动脉冲和驱动脉冲的独立的比例换算函数。 Comparing the number of IUT; and Figure ll shows a reset pulse, reset pulse help, shaking pulse and independent of the ratio of the driving pulse conversion function.

所有的图中,相应的部件采用相同的标号来表示。 All the figures, corresponding parts are designated by the same reference numerals.

下面是所引用的对比文献:欧洲专利申请EP031 00133, 2,标题为"Electrophoretic display panel",申请日为2003年1月23日(文件号为PHNL 030091); The following is a comparison of the cited documents: European patent application EP031 00133, 2, entitled "Electrophoretic display panel", filed on January 23, 2003 (File No. PHNL 030091);

欧洲专利申请EP02077017. 8,标题为"Display Device",申请日为2002年5月24日,或WO03/079323,标题为"Electrophoretic Active Matrix Display Device",公开日为2003年2月6日(文件号为PHNL 020441); European Patent Application EP02077017. 8, entitled "Display Device", filed 2002 May 24, or WO03 / 079323, entitled "Electrophoretic Active Matrix Display Device", publication date 2003, February 6 (file No. PHNL 020441);

欧洲专利申请EP 02079203, 2,标题为"Electrophoretic display panel",申请日为2002年10月10日(文件号为PHNL 021000); European patent application EP 02079203, 2, entitled "Electrophoretic display panel", filed October 10, 2002 (File No. PHNL 021000);

美国临时专利申请60/503, 844 ,标题为"An Electrophoretic Display with Reduced Look—up Table Memory",申请日为2003年 US Provisional Patent Application No. 60/503, 844, entitled "An Electrophoretic Display with Reduced Look-up Table Memory", filed in 2003

9月18日(文件号为US030333/ID61術8); September 18 (File No. US030333 / ID61 surgery 8);

美国临时专利申请60/473, 208,才示题为"Improved driving scheme for an electrophoret ic display",申请曰为2003年5月23曰(文件号为PHUS030141);以及EPO专利申请03102139.7 ,标题为"Electrophoretic display with improved grey scale",申请曰为2003年7月14曰(文件号为PHNL030828)。 US Provisional Patent Application No. 60/473, 208, was shown entitled "Improved driving scheme for an electrophoret ic display", said the application is May 23, 2003 said (File No. PHUS030141); and EPO Patent Application 03102139.7, entitled " Electrophoretic display with improved grey scale ", said the application is July 14, 2003 said (file No. PHNL030828).

图l和图2示出具有第一衬底8、第二相向衬底9和多个图像元2 的电子阅读装置的一部分显示屏1的实施例。 Figure l and Figure 2 shows a first substrate 8, a second embodiment of facing element substrate 9 and a plurality of image reading device 2 of the electronic part of the display panel 1. 图像元2可以沿呈二维结构的大体成直线排列。 2 image element can be moved substantially linearly arranged in a two-dimensional structure. 为清楚起见,示出的图像元2相互隔开,但实际上,图像元2相互非常靠近,从而形成连续的画面。 For clarity, the two image elements shown separated from each other, but in fact, very close to each image element 2 to form a continuous picture. 另外,图中仅示出完整显示屏的一部分。 Further, only a portion of FIG full screen. 也可以采用其它排列方式的图像元,如蜂巢排列方式。 Other arrangements may also be employed in the image element, such as a honeycomb arrangement. 具有带电粒子6的电泳介质5介于衬底8和9之间。 Electrophoretic medium 5 having charged particles 6 between the substrate 8 and 9. 第一电极3和第二电极4与每一图像元2相关。 The first electrode 3 and second electrode 4 unit 2 associated with each image. 电极3和4能够接收某一电势差。 Electrodes 3 and 4 can receive a potential difference. 图2中,对于每一图像元2,第一衬底具有第一电极3, 而第二衬底9具有第二电极4。 In FIG. 2, for each picture element 2, a first substrate having a first electrode 3 and the second substrate 9 has a second electrode 4. 带电粒子6可以位于电极3和4任何一个的近旁,也可以与之紧贴。 The charged particles 6 may be located in any of the 3 and 4 near the electrode may be in close contact therewith. 每一图像元2的外形由电极3和4之间带电粒子6的位置决定。 2. Each image element shape determined by the position of the charged particles 6 between the electrodes 3 and 4. 电泳介质5可以从美国专利5,961,8(M、 6, 120, 839和6, 130, 774中得知,并且可以从例如E Ink Corporation 获得。 Electrophoretic medium 5 may be, 6, 120, 839 and 6, 130, 774 is known from U.S. Patent No. 5,961,8 (M, for example, and can be obtained from E Ink Corporation.

举例说来,电泳介质5可以在白色液体中含有带负电的黑粒子6。 For example, the electrophoretic medium 5 may contain negatively charged black particles 6 in a white fluid. 当带电粒子6由于例如+ 15伏的势能差而靠近第一电极3时,图像元2的外观为白色。 Since the charged particles 6, for example, + 15 volts potential difference when near the first electrode 3, the appearance of the picture element 2 is white. 当带电粒子6由于例如-15伏特的势能差而靠近第二电极4时,则图像元2的外观为黑色。 When the charged particles 6, for example, -15 volts since the potential difference near the second electrode 4, the appearance of the image element 2 is black. 当带电粒子6介于电极3和4 之间时,图像元具有如介于黑、白之间的灰度级的中间外观。 When the electrodes 3 and 4 between the charged particles 6 between, such as between image elements having a gray level appearance intermediate between black and white. 专用集成电路(ASIC) 100控制每一图像元2的电势差,用以在整个显示屏上产生所希望的图像,如,图像和/或文字。 Application specific integrated circuit (ASIC) 100 controls each image element the potential difference of 2 to generate the desired image on the entire display screen, such as image and / or text. 整个显示屏由对应于显示器中的像素的许许多多的图像元组成。 The entire display screen by the image display element corresponding to a pixel in many compositions.

图3示意示出电子阅读装置的整体图。 FIG 3 shows a schematic overall view of the electronic reading device. 电子阅读装置300包括显示ASIC 100。 An electronic reading device 300 includes the display ASIC 100. 例如,ASIC100可以是Philips Corp的"Apollo" ASIC E-ink(电子油墨)显示控制器。 For example, ASIC 100 may be a Philips Corp "Apollo" ASIC E-ink (electronic ink) display controller. 显示ASIC 100通过寻址电路305控制一个或多个显示屏310 (诸如电泳屏幕),使之显示所希望的文字或图 Controlling a display ASIC 100 305 310 or more display screens (such as electrophoretic screens) by the addressing circuit, so as to display a desired text or FIG.

<p>阅读装置控制器330可以是执行任意一种类型的计算机代码装置如软件、固件、微代码等,以实现本文中所描述的功能。 <P> The reading device controller 330 may perform any type of computer code devices, such as software, firmware, microcode or the like, to implement the functions described herein. 因此,可以按照本领域中普通技术人员所熟悉的方式,提供一种含有这样一种计算机代码装置的计算机程序产品。 Thus, in accordance with ordinary skill in the art are familiar, there is provided a computer program product comprising a computer code means. 阅读装置控制器330还可以包含一种存储器(未示出),这是一种具体实施可以由机器(如阅读装置控制器330或执行实现本文中所描述的功能的方法的计算机)来执行指令程序。 The reading device controller 330 may further comprise one memory (not shown), which is (as a computer process or a reading device controller 330 performs implement the functions described herein) of a particular embodiment may be performed by a machine instruction program. 可以以本领域中的普通技术人员所熟悉的方式来提供这样一种程序存储装置。 This may be of ordinary skill in the art are familiar way to provide a program storage device.

显示ASIC 100可以具有逻辑电路,用于当例如在第一次打开电子阅读装置300的每y分钟(例如IO分钟)后和/或亮度偏差大于如3% 的反射时,例如在显示每x页以后,提供电子书的显示区域的强制复位。 Display ASIC 100 may have logic circuit, for example, when the first electronic reading device is opened at its y per minute 300 (e.g., IO minutes), and / or when the brightness deviation is larger than 3% as reflected, for example, in displaying each page x after the forced resetting to provide an electronic book display area. 对于自动复位来说,可以根据产生可以接受的图像质量的最低频率,按照经验来确定可以接受的频率。 For automatic resets, it can be produced in accordance with the frequency of the lowest acceptable image quality, empirically determined acceptable frequency. 同样,复位也可以由用户通过功能健或其它的接口装置进行人工启动,例如当用户开始对电子阅读装置进行读取或当图像质量跌落到无法接受的水平以下时。 Similarly, the reset may be manually actuated by the user via function keys or other interface means, for example when the user starts to read the electronic reading device or when the image quality drops to an unacceptable level.

ASIC 100向显示器寻址电路305提供指令,用于根据存储器320 中存储的信息,对显示器310进行驱动。 ASIC 100 provides instructions to the display addressing circuit 305, according to the information stored in the memory 320, 310 for driving the display.

可以采用温度传感器335如热耦或基于CMOS的温度传感器,来确定电子阅读装置300所处的周围环境温度,并向控制器100发送相应的信号。 Temperature sensors 335 such as thermocouples or CMOS-based temperature sensor to determine the ambient temperature at which the electronic reading device 300, 100 sends a corresponding signal to the controller may be employed.

本发明可以用于任何一种类型的电子阅读装置。 The present invention may be used in any type of electronic reading device. 图4中示出了一种可能的电子阅读装置400的例子,它具有两个独立的显示屏。 FIG 4 shows an example of a possible 400 electronic reading device having two separate displays. 具体 specific

-说来,第一显示区域442是在第一屏幕440上而第二显示区i戈452是在第二屏幕450上。 - say, a first display region 442 and the second display region 452 i Ge in the second screen 450 on the first screen 440. 屏幕440和450可以通过使屏幕相互平折或在表面上开启或平开的黏结剂445而连接在一起的。 Screens 440 and 450 may be connected together by flat screen to each other or fold apart to open or flat 445 on the surface of the binder. 由于这非常类似于读取传统书籍的经验,因此,这种装置是人们所希望的。 Since this is very similar to traditional book reading experience, so this means it is that people want.

可以提供各种用户接口装置,〗吏得用户可以启动页向前、页向后命令等。 May provide various user interface devices, a user may have to start〗 Officials page forward, page backward commands and the like. 例如,第一区域442可以包括屏上按钮424,其可以用鼠标或其它的指针装置、触摸启动、PDA笔或其它已知的技术来启动,以在电子阅读装置的各页中导航。 For example, the first region 442 may include on-screen buttons 424 that can use the mouse or other pointing device, a touch start, PDA pen, or other known techniques starting to navigate in the pages of the electronic reading device. 除了页向前命令和页向后命令以外,可以提供一种能力,在同一页中上巻或下巻。 In addition to page forward and page backward commands commands, it can provide a capability or down on the Volume Volume on the same page. 可以交替提供或另外添加硬件按钮422,使得用户能够提供页向前命令和页向后命令。 Or alternatively may provide for additional hardware button 422 enables the user to provide page forward and page backward commands command. 第二区域452还可以包括屏上按4丑414和/或硬件按4丑412。 The second region 452 may further include an upper panel 414 by ugly 4 and / or hardware 412 by 4 ugly. 注意,第一、第二显示区域442、 452周围的帧是不需要的,因为这些显示区域是无帧的。 Note that the first, second display area 442, surrounding the frame 452 is not required, since these areas are no display frame. 也可以采用其它的接口如话音命令接口。 Other interfaces may also be employed, such as a voice command interface. 注意,按钮412、 414; "2、 424不是对于两个显示区域都需要的。即,可以提供单組页向前按钮和页向后按钮。也可以启动单个按钮或其它的装置如摇杆开关,以提供页向前命令和页向后命令。也可以提供功能键或其它的接口装置,使得用户可以人工启动复位。 Note that the button 412, 414;. "2, 424 is not required for both display regions, i.e., may be provided a single set of page forward and page backward buttons may be button to start a single button or other device, such as a rocker switch. to provide page forward and page commands back command may also be provided a function key or other interface means, such that a user can manually initiate a reset.

在其它可能的设计中,电子书具有单个的显示屏,它带有单个的显示区域, 一次显示一页。 In other possible designs, an electronic book has a single display, which with a single display area, once a display. 或者,也可以把单个的显示屏分割成例如沿水平或纵向排列的两个或多个显示区域。 Alternatively, a single screen may be divided into the horizontal or e.g. two or more display regions arranged longitudinally. 另外,当采用多个显示区域时,可以以任何一种所希望的顺序来显示连续的页。 Further, when a plurality of display areas may be displayed in any of a continuous pages in the desired order. 例如,在图4 中,可以将第一页显示在显示区域422上,而把第二页显示在显示区域452上。 For example, in FIG. 4, a first page may be displayed on the display region 422, while the second page is displayed on the display area 452. 当用户请求观看下一页时,笫三页可以取代第一页显示在第一显示区域422中,而第二页保持显示在第二显示区域452中。 When the user requests to view the next, may be substituted for the first three pages Zi page displayed in the first display region 422, while the second page remains displayed in the second display area 452. 同样,第四页可以显示在第二显示区域452中,以此类推。 Similarly, a fourth page may be displayed in the second display region 452, and so on. 在另一种方式中,当用户请求观看下一页时,更新两个显示区域,使得第三页取代第一页显示在第一显示区域442内,并且将第四页取代第二页显示在第二显示区域452内。 In another embodiment, when the user requests to view the next update two display areas, so that instead of the first page of the third page is displayed in the first display region 442, and the fourth page is displayed in place of the second page 452 within the second display area. 当采用单个显示区域时,可以显示第一页, 随后,当用户输入下一个页命令时,笫二页覆盖第一页,以此类推。 When a single display region may display the first page, then, when the user enters a next page command, Zi two page overwrites the first page, and so on. 这一过程也可以对于页向后命令以反向方式工作。 This process can also work in the reverse way to page backward commands. 另外,该过程同样适用于语言是从右到左的阅读方式,如希伯来语,以及按列而不是按行来阅读的如中文的阅读方式。 In addition, the process also applies to language is read from right to left in the way, such as Hebrew, as well as by column rather than by row to read as Chinese way of reading.

此外,注意,无需把整个页都显示在显示区&戈上。 Also, note that without the whole page is displayed in the display area & Ge on. 可以显示页的一部分,并且所提供的滚动功能使得用户能够上巻、下巻、左、右阅读该页的其它部分。 Part of the page may be displayed, and a scroll function is provided enabling the user to the Volume, Volume lower, left and right to read other portions of the page. 可以提供放大和缩小能力,使得用户能够改变文字或图像的大小。 Ability to zoom in and out may be provided so that a user can change the size of text or image. 例如,可能用户希望阅读尺寸缩小的版本。 For example, a user might want to read a downsized version.

要解决的问题电子油墨形式的电泳显示器中的灰度级通常是通过在指定的时段中施加电压来产生的。 To solve the problem of electrophoretic display electronic ink in the form of gray levels usually by applying a voltage to a specified period generated. 电泳显示器中灰度的精度强烈地受到图像历史、 驻留时间、温度、湿度和电泳箔片的边缘非同质性的影响。 Gradation accuracy electrophoretic displays is strongly influenced by image history, the influence of the edge of time, temperature, humidity, and the electrophoretic foil inhomogeneity resident. 采用轨道稳定方法,可以实现精确的灰度级(grey level),这里,灰度级总是要么从基准黑状态要么从基准白状态(两种轨道)来实现的。 Using rail-stabilized approach allows accurate gradation (Gray Level), where, from the reference grayscale or black state is always either from the reference white state (two kinds of tracks) to achieve. 人们已经找到了采用单个过复位电压脉冲的驱动方法来驱动电泳显示器,正如在上述欧洲专利申请EP031 00133. 2中所讨论的那样。 It has been found with a single over-reset voltage pulse driving method of driving an electrophoretic display, as EP031 00133. 2 apply as discussed in the above mentioned European patent. 脉冲序列通常包括三个部分,即,摇动脉沖(SH1)、复位脉沖(R)和灰度驱动脉冲(D)。 Pulse sequence typically includes three parts, i.e., shaking pulses (SH1), the reset pulse (R) and a gray scale driving pulse (D). 另外,有时人们希望在复位脉沖和灰度驱动脉冲之间施加第二组摇动脉沖(SH2),用于进一步减小图像滞留,并提高图像质量。 In some cases, it is desirable to reset pulse is applied between the gradation and the second set of shaking pulses drive pulses (SH2), used to further reduce image retention, and improve image quality. 摇动脉冲的讨论见上述欧洲专利申请02077017. 8中的讨论。 See above discussion of shaking pulses discussed in European Patent Application 02077017.8. 摇动脉冲可以是硬件摇动脉沖,也可以是软件摇动脉沖。 Shaking pulses shaking pulses can be hardware, software shaking pulses can be. 硬件摇动脉冲用于显示器中一行以上的像素,而软件摇动脉冲则同时用于最多一行像素。 Hardware or more shaking pulses for a display line of pixels, and the software shaking pulses up to one row of pixels are simultaneously used. 另外,过复位脉沖之前可以还有一个与复位脉冲极性相反的复位脉沖(帮助脉冲)。 Further, there is a polarity opposite to the reset pulse before the reset pulse through the reset pulse (pulse help). 该帮助脉沖可以是相对于标准的或过复位脉冲而言,其持续时间减小了的,因为其设计是使得粒子回到轨道状态。 The pulse may be helped with respect to a standard or over-reset pulse, the duration of which is reduced, since it is designed so that the particles back to the track status.

图5-7中描述了一例用于包含带负电的白粒子和带正点的黑粒子的电泳显示器的驱动波形。 5-7 described in one case of a driving waveform for electrophoretic displays comprising the white particles and black particles with punctual is negatively charged. 图5中描述了采用轨道稳定驱动的示例波形500,其中的波形包括第一摇动脉沖(SH1)、复位脉冲(R)、和驱动脉冲(D)。 FIG. 5 depicts an example of using rail-stabilized driving waveform 500, wherein the waveform comprises a first shaking pulses (SH1), the reset pulse (R), and a driving pulse (D). 图6示出另一例采用轨道稳定驱动的波形600,其中的波形包括第一摇动脉沖(SH1)、复位脉冲(R)、第二摇动脉冲(SH2)和驱动脉冲(D)。 FIG 6 shows another embodiment using rail-stabilized driving waveform 600, wherein the waveform comprises a first shaking pulses (SH1), the reset pulse (R), a second shaking pulses (SH2) and a driving pulse (D). 图5和图6中的波形见上述欧洲专利申请EP03100133. 2中的讨论。 Figures 5 and 6 waveforms see above discussion in European Patent Application EP03100133. 2. 该方法示意示出用于通过白(W)轨道从暗灰(DG)到淡灰(LG)的示例图像转换。 The method is schematically shown by a white (W) example of an image converted from a track dark gray (DG) to light gray (LG) of. 总的图像更新时间(IUT)是每一部分的波形500或600中所使用的时间的和。 Total image update time (an IUT) is the waveform of each portion 500 or 600 and the time used. 在波形500中,L与"之间的时段中出现的复位脉沖(R)必须比使粒子从暗灰(DG)状态移动到白(W)状态所需的最小时间要长,从而确保在新的图像更新期间及时抹去老的图像,并确保图像质量。这里的最小时间是一个标准的复位持续时间,它对应于ti与t ,2之间的时间。t、与ta之间是附加的复位时间或过复位时间,其中的祸》 觉光学状态不会发生变化。标准复位需要时间与使粒子在两个电极之间移动的距离成正比,而过复位则是提高图像质量所需要的。摇动脉冲(SHl, SH2)用来减小驻留时间和图像历史效应,从而减小图像滞留并提高灰度精度。驱动脉冲用来在所希望的中间灰度状态如LG上,通过从轨道状态来驱动显示而加上灰色调如白色(W)。 In waveform 500, and the period between L "in the reset pulse appearing (R) than the particles must be moved from dark gray (DG) to a state of minimum time required for the white (W) state longer, thereby ensuring that new promptly erased during an image update the old image, the image quality and to ensure the minimum time here is a standard reset duration, which corresponds to ti and t, the time between 2 .t, is attached between ta reset time or reset time over which the bad "sleep optical state does not change. standard reset time required to make the particles move proportional to the distance between the two electrodes, but after reset is required to improve image quality. shaking pulses (SH1, SH2) for reducing the dwell time and image history effects, thereby reducing image retention and to improve the accuracy of the gradation drive pulses for the desired intermediate gray states, such as the LG, from the track state by to drive the display such as white and gray tone plus (W).

图7示出一例采用轨道稳定驱动的波形700,其中的波形包括摇动脉冲(SH1)、与复位脉冲(R)的极性相反的帮助复位脉冲(H)、复位脉冲(R)、第二摇动脉冲(SH2)和驱动脉冲(D)。 FIG. 7 shows an example of using rail-stabilized driving waveform 700, wherein the waveform comprises a polar shaking pulses (SH1), and a reset pulse (R) opposite to help reset pulse (H), the reset pulse (R), the second pivot pulses (SH2) and a driving pulse (D). 图7中示出的波形类型见上述欧洲专利申请03102139. 7中的讨论。 Figure 7 shows a waveform of the type described above, see the discussion of European Patent Application 03102139.7. 该示意示出的方法用于一例通过白(W)轨道从淡灰(LG)到淡灰(LG)的图像变换。 The method is schematically illustrated for one case by a white (W) from the image conversion grayish track (LG) to light gray (LG) of. 与图6中所示的波形相比较,过复位脉沖(R)之前还有一个极性与复位脉沖(R)相反的复位脉冲(帮助脉冲H)。 Compared with the waveform shown in FIG. 6, after the reset pulse (R) until there is a polarity reset pulse (R) opposite to a reset pulse (pulse helps H). 帮助脉沖(H)被设计用来使黑白粒子相互作用,从而可以实现更精确的灰度级,并且持续时间缩短,因为其不是设计用来使粒子到轨道状态的。 Help pulses (H) is designed to interact so that black and white particles, thereby enabling a more accurate gray scale level, and the duration is shortened, because it is not designed to track the state of the particles. 随后,过复位脉冲(R)将显示器复位至白轨道状态,其后,需要驱动脉沖(D),用来通过对显示器进行驱动,将灰色调从轨道状态例如白色(W)加到所希望的中间灰度状态如LG,如示出的那样。 Subsequently, after the reset pulse (R) is reset to the white display state track, thereafter, the driving pulses required (D), for driving a display by, for example, the gray white (W) from the track state was added to the desired intermediate gray states such as LG, as shown above. 在一种实例结构中,第一摇动脉冲(SH1)具有100毫秒的持续时间,帮助复位部分(H)具有150毫秒的持续时间,复位部分(R)具有700 毫秒的持续时间,而驱动部分(D)具有IOO毫秒的持续时间。 In one example configuration, the first shaking pulses (SH1) having a duration of 100 milliseconds, to help reset portion (H) has a duration of 150 ms, part of the reset (R) has a duration of 700 ms, the drive section ( D) has a duration IOO msec. 在复位脉冲(R)之后和在驱动脉冲(D)之前,还提供第二摇动脉沖(SH2)。 After the reset pulse (R) and before the driving pulse (D), is also provided a second shaking pulses (SH2).

图8描述了采用单个比例换算函数用于总图像更新时间(IUT)的比例换算函数800。 Figure 8 describes the use of a single scaling function for scaling the total image update time (an IUT) conversion function 800. 该比例换算函数800是采用IO与65。 The scaling function 800 is the use of IO and 65. C之间的实验结果在菱形所表示的不同点得到的,而这些实验值是采用图5中所示的波形在显示屏上测得的。 C results between different points indicated at diamond obtained, and these values ​​are based on experimental waveform shown in FIG 5 on the display screen measured. 注意,正如参照图3所讨论的那样,温度可以从电子阅读装置300中的温度传感器335而得到的。 Note that, as discussed with reference to FIG. 3, the temperature from the temperature sensor 335 may be an electronic reading device 300 is obtained. 不同温度(T)下的每一数据点是通过在两百以上的随机图像转换期间优化灰度级和灰度精度而得到的。 Each data point at different temperatures (T) is optimized by a gray level and a gray scale accuracy during a random two hundred or more in the image conversion is obtained. 根据这些实验数据,得到配合函数(fit function), 如图中的连续曲线所表示的那样。 The experimental data, obtained with function (fit function), as shown in a continuous curve represented. 用于提供不同温度下波形的数据可以被产生并被存储在查询表中。 For providing waveform data at different temperatures may be generated and stored in a lookup table. 在该方法中,将单个的比例换算函数 In this method, a single scaling function

800应用于波形500的分量,从而通过相同的比例换算因于,对摇动脉冲(SH1)、复位脉冲(R)和驱动脉冲(D)的持续时间中的每一个进行比例换算,而比例换算因子是通过在指定的温度(T)下读取比例换算换算函数800而得到的。 800 is applied to waveform components 500, whereby due to the scaling by the same ratio, the duration of each shaking pulse (SH1), the reset pulse (R) and a driving pulse (D) is performed in the scaling, the scaling factor by reading at a specified ratio of temperature (T) in terms of conversion function 800 obtained.

在基准温度25。 In reference temperature 25. C下得到单位比例换算因子。 C to give the scaling factor unit. 采用900毫秒的IUT, 在25°C下使波形最佳化。 Using 900 ms IUT, waveform optimized at 25 ° C. 在更高的温度下,IUT下降,然而在更低的温度下,IUT在0。 At higher temperatures, an IUT drop, but at a lower temperature, in an IUT 0. C下快速增大到5倍。 C under rapid increase to 5 times. 具体i兌来,在0。 DETAILED i to exchange, at 0. C处,需要5x 900亳秒-4.5秒的IUT,该时间长得无法接受。 C, 5x 900 need of an IUT Bo sec -4.5 sec, the time is unacceptably long. 具体说来,对于如电子书的电子阅读装置,IUT应当小于所指定的最大时间,如l秒,以避免所形成的延迟对用户造成不便。 Specifically, for the electronic reading devices such as electronic book, an IUT should be less than the specified maximum time, such as l second, in order to avoid delay to the user inconvenience formed. 在65。 65. C下,需要约0.2x900毫秒= 180毫秒的IUT。 Under C, it takes about 0.2x900 ms = 180 ms IUT. 但是,在这种情况下,灰度精度并不是主要的问题。 However, in this case, grayscale accuracy is not the main problem. 另外,在该温度范围内的宽范围IUT值会导致用户无法接受其性能。 Further, a wide range of IUT value in this temperature range will result in unacceptable performance of the user. 将在下文中详述的本发明的技术克服了单个比例换算函数方法的缺点。 The techniques of the present invention is described in detail below overcomes the shortcomings of the single scaling function method.

图9中示出了复位脉沖和驱动脉沖的比例换算函数。 FIG 9 shows the ratio of the drive pulse and the reset pulse conversion function. 本发明提出了一种用于补偿具有至少2个数据位的灰度的电泳显示器驱动方案的温度依赖性的技术。 The present invention proposes a temperature dependence of an electrophoretic display driving scheme for compensating at least two data bits having gradation technology. 具体说来,至少两个不同的比例换算函数SF1和SF2用来根据所确定的温度对驱动波形中所使用的电压脉冲的脉冲时间进行比例换算。 Specifically, at least two different scaling function used to SF1 and SF2 pulse time waveform of a driving voltage pulse used is scaled according to the determined temperature. SF1是驱动脉冲(D)的比例换算函数,而SF2是复位脉冲(R)的比例换算函数。 SF1 is a proportional drive pulse (D) in terms of function, and SF2 is the ratio of the reset pulse (R) in terms of function. 在基准温度(U例如25°C下施加如单位(unity)的基准(ref)水平的比例换算函数。通过采用在所确定的温度下读取相关的比例换算函数(SF2)而获得的比例换算因子,对基准复位脉沖持续时间如700毫秒进行比例换算来确定复位脉沖(R)的持续时间。与此类似,采用在所确定的温度下读取相关比例换算函数(SF1)而得到的比例换算函数,对基准驱动脉冲持续时间进行比例换算来确定驱动脉冲(D)的持续时间。 Reference temperature ratio (U ratio e.g. 25 ° C under application of such units (Unity) the reference (ref) level conversion function. Obtained by using the scaling function to read the relevant (SF2) at the determined temperature conversion factor, duration of the reset pulse as the reference for scaling ratio to determine the duration of the reset pulse (R) a. Similarly, the relative proportions employed read at the determined temperature conversion function (SF1 of) obtained in terms of 700 ms function, the reference drive pulse duration for scaling the duration of the drive pulse to determine (D) a.

通常,比例换算函数SF1和SF2会使显示器中的粒子移动性或液体的粘滞性随温度而变。 Typically, SF1 and SF2 scaling function will display the viscous or liquid particles are moved varies with temperature. 在更冷的温度下,需要增大复位脉沖(R)的持续时间,从而将显示器复位至所希望的轨道状态,同时,需要增大后续驱动脉冲(D)的持续时间,以便把显示器驱动至所希望的最大灰度状态。 At colder temperatures, it is necessary to increase the duration of the reset pulse (R), thereby resetting the display state to the desired track, while necessary to increase the duration of the subsequent drive pulse (D) in order to drive the display desired maximum gray state. 注意,将SF2的斜率的绝对值选择为远远小于SF1的斜率的绝对值。 Note that the absolute value of the slope selected SF2 SF1 is much smaller than the absolute value of the slope. 换言之,SF1具有很强的温度依赖性,而SF2具有更渐进的温度依赖性。 In other words, SF1 of a strong temperature dependence, the more gradual SF2 having temperature dependency. 采用这种方法,更低温度下的总图像更新时间(IUT)大大减小, 同时保持良好的图像质量。 In this way, a total image update time (an IUT) is greatly reduced at lower temperatures, while maintaining good image quality. 同时,更高温度下的IUT保持在Tw下的值。 Meanwhile, IUT at higher temperature is maintained at the value of Tw. 在该更高的温度下,我们选择更高的SF2,以便在显示器可以工作的温度范围内提高灰度精度并减小总的IUT差。 In the higher temperature, we choose a higher SF2, in order to improve the accuracy of gradation display can operate within a temperature range and to reduce the overall difference between the IUT. 与图8中单个比例换算函数800相比,大大减小了0与65。 Ratio compared with the single conversion function 800 of FIG. 8, 0 and 65 is greatly reduced. C之间的IUT差,从而大大改进了用户对显示器的视觉感觉。 The difference between the IUT C, thereby greatly improving the user's visual perception of the display.

标准复位脉冲时间是对温度敏感的,并强烈地与液体粘滞性相关, 但过复位部分对温度的敏感小一些。 Standard Time reset pulse is temperature sensitive, and is strongly associated with the liquid viscosity, but after reset portion sensitive to temperature smaller. 因此,最重要的是,按照液体粘滞性的变化,用温度对标准复位脉冲进行比例换算,而过复位脉沖持续时间主要按照图像质量来选择。 Therefore, the most important thing is, according to the variation of the viscous liquid, the temperature of the standard scaled reset pulse, but after the main reset pulse duration according to the image quality selected.

图IO描述了将采用单个比例换算函数的IUT与采用双比例换算函数的IUT相比,总图像更新时间(IUT)随温度的变化关系。 FIG IUT IO describes using a single scaling function with a scaling function using double IUT compared to the total image update time (IUT) change with temperature. 曲线1000 描绘了按照本发明的总图像更新时间(1 UT)随温度(T)的函数关系,并代表两种分别用于驱动脉冲和复位脉冲的不同比例换算函数(SFl, SF2) 的组合结杲。 Curve 1000 depicts the function according to the total image update time (1 UT) according to the present invention is a function of temperature (T) and, respectively, represent two different ratios for combining junction driving and reset pulse conversion function (SFl, SF2) of Gao. 为了进行比较,采用单个比例换算函数的结果在图中示出为曲线800,正如参照图8所进行的讨论的那样。 For comparison, the results using a single scaling function is shown in the curve 800, as discussed with reference to FIG. 8 as for.

过复位脉冲中使用的时间可以例如是标准复位时间的1. 05倍变化到3倍。 Time over the reset pulse may be used, for example, 1.05 times the standard changes the reset time to 3 times. IUT主要由复位脉冲持续时间决定,该持续时间约为IUT的80%。 IUT mainly determined by the duration of the reset pulse, the duration of about 80% IUT. 能实现IUT的大大减小,尤其是在低于基准温度(Tr")的温度下。 另一方面,通过增大复位脉冲的时间长度,提高了高于基准温度的温度下的灰度精度。由于粒子和离子的高移动性或较低的液体粘滞性, 人们希望相对于更高温度下的驱动脉沖具有更大的过复位。与单个的比例换算函数曲线800相比,只要IUT低于Tw下的IUT,在这些温度下可以具有更长的IUT。在高于Tw的温度范围内,产生与基准IUT水平(ref)的小偏移。 IUT can be achieved is greatly reduced, especially at lower than the reference temperature (Tr ") temperatures. On the other hand, by increasing the length of time the reset pulse, to improve the accuracy of gradation at a temperature higher than a reference temperature. or lower due to the high mobility of liquid viscosity and ion particles, it is desirable with respect to the drive pulses at a higher temperature has a greater over-reset compared to a single scaling function curve 800, just below the IUT IUT at Tw, at these temperatures can have a longer IUT. Tw in the above temperature range, generating the reference level IUT (ref) is a small offset.

例如,对于具有900毫秒(包括100毫秒持续时间的摇动部分、100 毫秒持续时间的驱动部分和7 0 0毫秒持续时间的复位部分)的IUT的基准温度25°C,可以使波形为最佳。 For example, for 900 ms (including 100 ms duration of the shaking portion, the driving portion 100 ms duration and 700 ms duration of the reset portion) of the IUT reference temperature 25 ° C, the optimum waveform can be made. 油墨或其它双稳态材料的饱和时间约为200毫秒,其为标准复位时间。 Saturation time of the ink or other bi-stable material is about 200 milliseconds, which is a standard reset time. 当采用单个比例换算函数曲线800 将该波形扩展到0°C时,IUT将以因子5增大。 When a single scaling function curve of the waveform 800 extends to 0 ° C, IUT 5 factor will increase. 人们已经证明,在更低的温度下,摇动脉沖的持续时间将保持相同,甚至减小。 It has been demonstrated, at a lower temperature, duration of shaking pulses would remain the same, or even decrease. 为简便起见, 在本例中,采用恒定的摇动脉冲时间。 For simplicity, in the present embodiment, the shaking pulses with a constant time. IUT变成100毫秒+ 5 x 700毫秒+ 5xi00毫秒-4100毫秒。 IUT becomes 100 ms + 5 x 700 ms + 5xi00 ms -4100 ms. 4旦是,当过复位仅方文大1. 5倍时,将导致对于复位脉沖,比例换算因子为(5 x 200亳秒+ 1. 5 x 500亳秒)/700 =2, 5。 4 denier is reset only when too large Fang 1.5 times, will lead to a reset pulse, scaling factor (5 x 200 seconds Bo Bo + 1. 5 x 500 sec) / 2 = 700, 5. 现在,IUT变成100亳秒+ 2, 5 x 700毫秒+ 5 x 100毫秒=2350毫秒,其表示显著减小。 Now, an IUT Bo into 100 seconds + 2, 5 x 700 ms + 5 x 100 ms = 2350 ms, which represents a significantly reduced.

也可以有两个以上的比例换算函数,用来采用温度对波形进行比例换算。 There may be more than two scaling function for temperature using the waveform scaling. 例如,可以提供独立的比例换算函数,用来对标准复位脉沖、 过复位脉沖、帮助复位脉冲和驱动脉沖的持续时间进行比例换算。 For example, a separate scaling function to reset pulse standard, over-reset pulse, reset pulse and the duration to help drive pulse is scaling. 还可以提供独立的比例换算函数,用于第一和/第二摇动脉沖。 It may also be provided separate scaling function for the first and / or second shaking pulses. 图11中示出了一个例子。 FIG 11 shows an example.

图11示出复位脉冲、帮助复位脉沖、摇动脉冲和驱动脉沖的独立比例换算函数。 11 shows a reset pulse, reset pulse to help separate the drive pulse and the proportion of shaking pulses conversion function. SF1、 SF2、 SF3和SF4分别表示驱动脉沖(D)、复位脉冲(R)、帮助复位脉沖(H)和摇动脉沖的比例换算函数。 SF1, SF2, SF3 and SF4, respectively, represent the driving pulse (D), the reset pulse (R), the ratio of assist reset pulse (H) and shaking pulses conversion function. 这里,摇动脉冲显示温度比例换算因子(SF4),该温度比例换算因子随温度的增加而增加,而帮助复位脉冲(H)具有温度比例换算因子(SF3),它介于驱动(SF1)脉冲的和过复位(SF2)脉冲的温度比例换算因子之间。 Here, the temperature of shaking pulses display scaling factor (SF4), the temperature ratio increases with increasing temperature scaling factors, and to help reset pulse (H) having a temperature scaling factor (SF3), which is between the drive (SF1 of) pulse and over-reset (SF2) pulse between a temperature scaling factor.

通常,还可以提供独立的比例换算函数,用于不同的图像转换, 例如黑至白、黑至暗灰等。 Typically, it may also be provided independently of the scaling function for converting different image, such as black to white, dark gray to black and the like. 同时,采用比例换算函数进行比例换算的基准脉冲持续时间可以因显示更新情况(例如更新包含中间灰度级的图像与更新整个由白像素或白像素组成的图像相比)的不同而不同。 Different same time, using scaling function scaling the reference pulse duration may be due to display updates (e.g. update includes halftone image and the updated image generated by the whole white pixels or white pixels compared) differ. 实际上,可以根据比例换算函数事先产生在不同温度下提供波形的数据, 并将其存储在查询表中。 Indeed, the data can be provided in advance to generate waveforms at different temperatures according to the scaling function, and stored in a lookup table. 对存储器和处理资源的限制会对所使用的比例换算函数的数量和/或复杂性产生限制。 Ratio limits have memory and processing resources to be used in terms of a function of the number and / or complexity of a limitation.

注意,在上述例子中,使用脉宽调制(PWM)驱动来描述本发明中, 这里,改变每一波形中的脉冲时间,但电压幅度保持不变。 Note that, in the above example, pulse width modulation (PWM) drive of the present invention will be described herein, each time changing the pulse waveform, the voltage amplitude is kept constant. 但是,本发明也可以用于其它的驱动方式,例如基于电压调制驱动(VM),其中, 改变每一波形中的脉冲电压复位,或组合的PWM和VM驱动。 However, the present invention may also be used in other driving methods, such as voltage modulation driving (VM) based, wherein changing the pulse voltage waveform of each reset, or combined PWM and VM driving. 本发明也适用于彩色以及灰度双稳态显示。 The present invention is also applicable to a color and a gradation bistable display. 同时,电极结构没有限制。 Meanwhile, the electrode structure is not limited. 例如, 可以采用顶部/底部电极结构、蜂巢结构同面(in-plane)切换结构或其它组合的同面切换和纵向切换。 For example, a top / bottom electrode structure, honeycomb structure with the surface (in-plane) switching can be employed with other structures, or a combination of surface and vertical handover switching. 此外,本发明可以无源矩阵以及有源矩阵电泳显示器来实现。 Further, the present invention may be passive matrix and active matrix electrophoretic display is achieved. 事实上,本发明可以以任何一种双稳态显示器的形式来实施,例如,任何不消耗功率并且同时在图像更新以后图像大体保持在显示器上的显示器。 Indeed, the present invention may be embodied in the form of any one of bi-stable display, for example, any power is not consumed and remains substantially simultaneously display the image on the display after an image update. 同时,本发明可以适用于单个和多个^f见窗显示器,如存在打字机,莫式的情况。 Meanwhile, the present invention is applicable to both single and multiple window displays, see ^ f, if present typewriter, a Mohs situation.

尽管本发明的描迷是考虑了本发明优选实施例的情况,但应当理解,在不偏离本发明的精神的情况下,冬发明的形式和细节还可以有各种修改形式和变化。 Although the description of the present invention is a fan contemplated preferred embodiment of the present invention, the case of embodiment, it should be understood that, without departing from the spirit of the present invention, the form and details of the invention may also winter various modifications and variations. 因此,本发明并非仅限于上迷形式,本发明实施例的变化形式都落在权利要求书所限定的范围内。 Accordingly the present invention is not limited to the fan, changes, embodiments of the present invention fall within the claims defined range.

Claims (25)

1. 一种驱动双稳态显示器的方法,包含: 确定与所述双稳态显示器(310)相关的温度(T); 根据所确定的温度和第一比例换算函数(SF2),确定将复位脉冲(R) 施加到该双稳态显示器的至少一部分的持续时间;以及根据所迷确定的温度和与所迷第一比例换算函数(SF2)不同的第二比例换算函数(SF1),确定将驱动脉冲(D)施加到所述双稳态显示器的至少一部分的持续时间。 A bistable display driving method, comprising: determining related to the bi-stable display (310) temperature (T); according to the determined temperature and a first scaling function (SF2), determining a reset pulse (R) is applied to at least a portion of the duration of the bi-stable display; and a second ratio different conversion functions (SF1 of) determined according to the temperature and fans of the fan in terms of the first proportional function (SF2), determining drive pulse (D) applied to at least a portion of the duration of the bi-stable display.
2. 如权利要求l所述的方法,其特征在于, 所迷确定施加所述复位脉冲的持续时间包含按照所述第一比例换算函数(SF2)和所述确定的温度(T)来确定第一比例换算因子,并通过所述第一比例换算因子对一基准复位脉冲持续时间进行比例换算;以及所迷确定施加所述驱动脉冲的持续时间包含按照所述第二比例换算函数(SF1)和所述确定的温度(T)来确定第二比例换算因子,并通过所述第二比例换算因子对一基准驱动脉冲持续时间进行比例换算; 其中,当所述确定的温度低于基准温度(Tref)时,所述第一比例换算因子小于所述第二比例换算因子。 2. The method according to claim l, characterized in that the fan determines the duration of the reset pulse comprises applying determined in accordance with temperature (T) of the first scaling function (SF2) and the determination of a scaling factor, and the reset pulse for a reference time duration scaled by the first scale conversion factor; and the application of the determined fan drive pulse in accordance with said duration comprising a second scaling function (SF1 of) and determining the temperature (T) to determine a second scaling factor, and a reference to the drive pulse duration for scaling by the second scaling factor; wherein, when said determined temperature is below the reference temperature (Tref is ), the first scaling factor is less than said second scaling factor.
3. 如权利要求l所述的方法,进一步包含: 根据所述确定的温度和另一比例换算函数(SF4),确定向所述双稳态显示器的至少一部分施加摇动脉冲(SH1, SH2)的持续时间。 3. The method of claim l, further comprising: scaling function (SF4) according to the determined temperature and a further proportion of shaking pulses is applied is determined (SH1, SH2) to the bi-stable display at least a portion of the duration.
4. 如权利要求3所述的方法,其特征在于, 所迷另一比例换算函数(SF4)在至少一部分温度范围内,随着变化的温度具有与所述第一和第二比例换算函数的斜率相反的斜率。 4. The method according to claim 3, characterized in that the further scaling function (SF4) of the fan in at least a portion of the temperature range, as the temperature changes having the first and second scaling functions opposite slopes slope.
5. 如权利要求l所迷的方法,进一步包含: 根据所述确定的温度和另一比例换算函数(SF3),确定在所述复位脉冲之前向所述双稳态显示器的至少一部分施加帮助脉冲(H)的持续时间。 5. A method as claimed in claim l as fans, further comprising: scaling function (SF3) according to the determined temperature and a further proportion, to help determine the pulse is applied to at least a portion of said bi-stable display prior to the reset pulse (H) duration.
6. 如权利要求5所述的方法,其特征在于, 所述另一比例换算函数(SF3)介于所述第一(SF2)和所述笫二(SF1) 比例换算函数之间。 6. The method according to claim 5, wherein said further scaling function (SF3) interposed between said first (SF2) and the undertaking of two (SF1 of) between the scaling function.
7. 如权利要求l所迷的方法,其特征在于,当所述确定的温度低于基准温度(T^)时,所述第一比例换算函数随着变化温度具有的斜率的绝对值小于所述第二比例换算函数的斜率的绝对值。 7. A method as claimed in claim l as fans, wherein, when said determined temperature is lower than the reference temperature (T ^), with the first scaling function having an absolute value of the temperature change smaller than the slope said second scaling the absolute value of the slope function.
8. 如权利要求l所述的方法,其特征在于, 所述双稳态显示器包含电泳显示器。 8. The method according to claim l, wherein said bi-stable display comprises an electrophoretic display.
9. 如权利要求l所述的方法,其特征在于: 当所述温度(T)低于基准温度(Tref)时,所述第一比例换算函数(SF2)和所述第二比例换算函数(SF1)随温度的降低而增加。 9. The method according to claim l, wherein: when the temperature (T) lower than the reference temperature (Tref is), the first scaling function (SF2) and the second scaling function ( SF1) increases with decreasing temperature.
10. —种驱动双稳态显示器的设备,包含: 用于确定与所述双稳态显示器(310)相关的温度(T)的装置; 用于根据所确定的温度和第一比例换算函数(SF2),确定将复位脉沖(R)施加到该双稳态显示器的至少一部分的持续时间的装置;以及用于根据所述确定的温度和与所述第一比例换算函数(SF2)不同的第二比例换算函数(SF1),确定将驱动脉沖(D)施加到所述双稳态显示器的至少一部分的持续时间的装置。 10. - kind of bi-stable display driver apparatus, comprising: means related to temperature (T) means for determining the bi-stable display (310); a scaling function based on the determined temperature and a first ratio ( SF2), the apparatus determines the duration of the bi-stable display at least a portion of the reset pulse (R) is applied to; and means for determining the temperature and the conversion ratio of the first function (SF2) different from the first two scaling function (SF1), the means determining the duration of the bi-stable display at least a portion of the driving pulse (D) to be applied.
11. 如权利要求10所述的设备,其特征在于, 所述用于确定施加所述复位脉冲的持续时间的装置包含用于按照所述笫一比例换算函数(SF2)和所述确定的温度(T)来确定第一比例换算因子,并通过所述第一比例换算因子对一基准复位脉沖持续时间进行比例换算的装置;以及所述用于确定施加所述驱动脉冲的持续时间的装置包含用于按照所述笫二比例换算函数(SF1)和所述确定的温度(T)来确定第二比例换算因子,并通过所述第二比例换算因子对一基准驱动脉冲持续时间进行比例换算的装置; 其中,当所述确定的温度低于基准温度(U时,所述笫一比例换算因子小于所述第二比例换算因子。 11. The apparatus according to claim 10, wherein the temperature of said means for determining the duration of the reset pulse comprises applying a scaling function (SF2) in accordance with said Zi and said determined ratio (T) to determine a first scaling factor, and a reference for the reset pulse duration scaling means for scaling the first scale factor by; applying means and said means for determining the duration of the drive pulse comprises scaling according to the undertaking of the two proportional functions (SF1 of) and determining the temperature (T) to determine a second scaling factor and the second scaling factor by a reference to the drive pulse duration for the scaling apparatus; wherein, when said determined temperature is lower than the reference temperature (U, said scaling factors Zi is less than the second scaling factor.
12. 如权利要求10所述的设备,进一步包含: 用于根据所述确定的温度和另一比例换算函数(SF4),确定向所述双稳态显示器的至少一部分施加摇动脉冲(SH1, SH2)的持续时间的装置。 12. The apparatus according to claim 10, further comprising: means for scaling function (SF4) according to the determined temperature and a further proportion of shaking pulses is applied is determined (SH1 to at least a portion of the bi-stable display, SH2 means) duration.
13. 如权利要求12所迷的设备,其特征在于, 所述另一比例换算函数(SF4)在至少一部分温度范围内,随着变化的温度具有与所述第一和第二比例换算函数的斜率相反的斜率。 13. The fan apparatus as claimed 12, characterized in that said further scaling function (SF4) in at least a portion of the temperature range, the temperature varies in terms of having the first and second scaling function opposite slopes slope.
14. 如权利要求IO所述的设备,进一步包含: 用于根据所迷确定的温度和另一比例换算函数(SF3),确定在所述复位脉沖之前向所述双稳态显示器的至少一部分施加帮助脉沖(H)的持续时间的装置。 14. The apparatus according to claim IO, further comprising: means for determining the temperature and the fan further scaling function (SF3), said determining is applied to at least a portion of said bi-stable display prior to the reset pulse according to It means helping pulse duration (H) is.
15. 如权利要求14所述的设备,其特征在于, 所述另一比例换算函数(SF3)介于所述第一(SF2)和所述第二(SF1) 比例换算函数之间。 15. The apparatus according to claim 14, wherein said further scaling function (SF3) interposed between said first (SF2) and the second (SF1 of) between the scaling function.
16. 如权利要求IO所述的设备,其特征在于, 当所述确定的温度低于基准温度(Lef)时,所述第一比例换算函数随着变化温度具有的斜率的绝对值小于所述第二比例换算函数的斜率的绝对值。 IO 16. The apparatus according to claim, wherein, when said determined temperature is lower than the reference temperature (of Lef), the first scaling function with a slope having an absolute value of the temperature change is smaller than the a second scaling function of the absolute value of the slope.
17. 如权利要求10所迷的设备,其特征在于, 所述双稳态显示器包含电泳显示器。 10 17. The fan apparatus as claimed in claim, wherein said bi-stable display comprises an electrophoretic display.
18. 如权利要求IO所述的设备,其特征在于: 当所述温度(T)低于基准温度(Tref)时,所迷第一比例换算函数(SF2)和所述第二比例换算函数(SF1)随温度的降低而增加。 IO 18. The apparatus of claim, wherein: when the temperature (T) lower than the reference temperature (Tref is), the first scaling function (SF2) and the second fan scaling function ( SF1) increases with decreasing temperature.
19. 一种电子阅读装置,包含: 双稳态显示器(310);以及通过下迷手段来更新所述双稳态显示器上的图像的控制器(100): (a) 确定与所述双稳态显示器(310)相关的温度(T), (b) 根据所述确定的温度和第一比例换算函数(SF2),确定将复位脉冲00施加到所述双稳态显示器的至少一部分上的持续时间;以及(c) 根据所述确定的温度和与所述第一比例换算函数(SF2)不同的第二比例换算函数(SF1),确定将驱动脉冲(D)施加到所述双稳态显示器的至少一部分上的持续时间。 19. An electronic reading device, comprising: a bi-stable display (310); a controller and updating the image on the bi-stable display (100) by the fan means: (a) determining the bistable continuous state on at least a portion (310) related to the temperature (T), (b) the reset pulse 00 applied to the bistable display based on the determined temperature and a first scaling function (SF2), is determined time; and (c) based on said determined temperature and said first scaling function (SF2) a second, different scaling function (SF1), determines the drive pulse (D) applied to the bistable display the duration on the part of at least.
20. 如权利要求19所迷的电子阅读装置,其特征在于, 所述确定施加所述复位脉冲的持续时间包含按照所述第一比例换算函数(SF2)以及所述确定的温度(T)来确定第一比例换算因子,并通过所迷第一比例换算因子对一基准复位脉冲持续时间进行比例换算; 以及所述确定施加所述驱动脉冲的持续时间包含按照所述第二比例换算函数(SF1)和所述确定的温度(T)来确定第二比例换算因子,并通过所述第二比例换算因子对一基准驱动脉沖持续时间进行比例换算; 其中,当所述确定的温度低于一基准温度(Tr")时,所述第一比例换算因子低于所述第二比例换算因子。 20. A fan 19 electronic reading device as claimed in claim, wherein said determining the duration of application of the reset pulse comprises a temperature conversion function (SF2) in accordance with said first and said determined ratio (T) by determining a first scaling factor, and a factor of the pulse duration for the reset reference scaled by a first scaling of the fan; and determining the duration of application of said drive pulse in accordance with said conversion comprises a second proportional function (SF1 ) and determining the temperature (T) to determine a second scaling factor, and a reference to the drive pulse duration by a scaling factor for scaling the second ratio; wherein, when said determined temperature is below a reference when the temperature (Tr "), the first scaling factor is less than said second scaling factor.
21. 如权利要求19所述的电子阅读装置,其特征在于,通过根据所述确定的温度和另一比例换算函数(SF4)来确定向所述双稳态显示器的至少一部分施加摇动脉冲(SH1, SH2)的持续时间,所述控制器对所述双稳态显示器上的图像进行更新。 21. The electronic reading device according to claim 19, wherein said determining the temperature and by further scaling function (SF4) is applied to determine at least a portion of shaking pulses to the bi-stable display (SH1 , SH2) duration, the controller of the image on the bi-stable display is updated.
22. 如权利要求19所述的电子阅读装置,其特征在于,通过根据所述确定的温度和另一比例换算函数(SF3)来确定在所述复位脉冲之前向所述双稳态显示器的至少一部分施加帮助脉沖(H)的持续时间,所述控制器对所述双稳态显示器上的图像进行更新。 22. The electronic reading device according to claim 19, wherein said determining the temperature and by further scaling function (SF3) is determined at least before the reset pulse to the bistable display applying a pulse duration of assistance part (H), the controller of the image on the bi-stable display is updated.
23. 如权利要求19所述的电子阅读装置,其特征在于, 当所述确定的温度低于一基准温度(U时,所述第一比例换算函数随变化温度具有的斜率的绝对值小于所述第二比例换算函数的斜率的绝对值。 23. The absolute value of the electronic reading device as claimed in claim 19, wherein, when said determined temperature is less than a reference temperature (U, said first scaling function having a slope with temperature is smaller than the said second scaling the absolute value of the slope function.
24. 如权利要求19所述的电子阅读装置,其特征在于, 所述双稳态显示器包含电泳显示器。 24. The electronic reading device according to claim 19, wherein said bi-stable display comprises an electrophoretic display.
25. 如权利要求19所迷的电子阅读装置,其特征在于: 当所述温度(T)低于基准温度OW)时,所迷第一比例换算函数(SF2)和所述第二比例换算函数(SF1)随温度的降低而增加。 25. The fan 19 electronic reading device as claimed in claim, wherein: when the temperature (T) lower than the reference temperature OW), the first scaling function (SF2) and the second fan scaling function (SF1 of) increases with decreasing temperature.
CNB2004800260268A 2003-09-12 2004-09-09 Method of compensating temperature dependence of driving schemes for electrophoretic displays CN100557676C (en)

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