WO2005022502A1 - Livre electronique a qualite d'image amelioree - Google Patents

Livre electronique a qualite d'image amelioree Download PDF

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Publication number
WO2005022502A1
WO2005022502A1 PCT/IB2004/051604 IB2004051604W WO2005022502A1 WO 2005022502 A1 WO2005022502 A1 WO 2005022502A1 IB 2004051604 W IB2004051604 W IB 2004051604W WO 2005022502 A1 WO2005022502 A1 WO 2005022502A1
Authority
WO
WIPO (PCT)
Prior art keywords
page
display
display region
location
starting
Prior art date
Application number
PCT/IB2004/051604
Other languages
English (en)
Inventor
Guofu Zhou
Jan Van De Kamer
Original Assignee
Koninklijke Philips Electronics, N.V.
U.S. Philips Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics, N.V., U.S. Philips Corporation filed Critical Koninklijke Philips Electronics, N.V.
Priority to EP04769884A priority Critical patent/EP1665209A1/fr
Priority to JP2006525247A priority patent/JP2007518111A/ja
Publication of WO2005022502A1 publication Critical patent/WO2005022502A1/fr

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof

Definitions

  • the use of flexible sheets allows the design of electronic reading devices that approximate the appearance of a conventional book.
  • one difficulty with such electronic reading devices is that the image quality is reduced due to image retention effects.
  • a previous image may not be fully erased when the next image is displayed, in particular when the pixels are repeatedly switched, leading to an integration of the image retention on the display.
  • the memory effect of a pixel is mainly localized to each pixel but can sometimes depend on surrounding pixels.
  • a reset is periodically performed by switching the whole display between full black and full white states, e.g., at least three times.
  • a reset pulse is used having a duration, e.g., up to 500 msec, that is sufficient to move the particles to extreme optic states, e.g., black or white.
  • the reset is inconvenient for the user because it usually lasts between three to five seconds and is clearly visible. It would therefore be desirable to reduce image retention effects to reduce the frequency with which such resets are needed.
  • the present invention addresses the above and other issues.
  • a method for displaying information on an electronic reading device having a display region with pixels arranged in a plurality of rows and columns.
  • Each pixel may comprise switching electronics such as thin film transistors (TFTs), diodes or metal-insulator-metal (MIM) devices, for instance.
  • TFTs thin film transistors
  • MIM metal-insulator-metal
  • the first region 442 may include on-screen buttons 424 that can be activated using a mouse or other pointing device, a touch activation, PDA pen, or other known technique, to navigate among the pages of the electronic reading device.
  • on-screen buttons 424 can be activated using a mouse or other pointing device, a touch activation, PDA pen, or other known technique, to navigate among the pages of the electronic reading device.
  • Hardware buttons 422 may be provided alternatively, or additionally, to allow the user to provide page forward and page backward commands.
  • the second region 452 may also include on-screen buttons 414 and/or hardware buttons 412. Note that the frame 405 around the first and second display regions 442, 452 is not required as the display regions may be frameless. Other interfaces, such as a voice command interface, may be used as well.
  • a row driver 510 and column driver (source driver) 500 provide signals to each pixel to display a desired image, such as a page of text to be read by a user.
  • a desired image such as a page of text to be read by a user.
  • the new page is displayed starting at a different location, such as a different row, than the previous page.
  • a first page is displayed using the shaded pixels 530, which form a subset of all pixels in the display region 520.
  • the first page is displayed starting on the first row of the display region 520 and extending through the fourteenth row. The fifteenth and sixteen rows are not used for displaying the first page.
  • the zigzag pattern can be described by the series: (0,0), (0,1), (0,2), (1,2), (1,1), (1,0), (2,0), (2,1), (2,2).
  • Analogous right to left patterns may be used.
  • a spiral pattern is used, for example, as described by the series: (0,0), (1,0), (2,0), (2,1), (2,2), (1,2), (0,2), (0,1), (1,1).
  • substantially random vertical and/or horizontal offsets may be selected for row and/or column shifting, e.g., by providing a random number generator that outputs an integer between the minimum and maximum offset values.
  • the nth page is updated starting from the first row of the display, while the (n+l)th page is updated with a vertical shift, e.g., starting from the second row of the display.
  • the (n+2)th page may start from the third row.
  • the maximum shift has been reached, e.g., two rows maximum
  • the third page starts from the first row, and the pattern continues.
  • the probability that the same pixel is repeatedly switched to, e.g., black text is significantly reduced, avoiding the integration of image retention on the pixels. It has been experimentally observed that the frequency of the forced reset of the whole display can be significantly reduced, thereby reducing power consumption and improving user convenience.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Digital Computer Display Output (AREA)

Abstract

On peut obtenir une amélioration de la qualité des images dans un dispositif de lecture électronique (300, 400) tel que, par exemple, un livre électronique, à l'aide d'afficheurs électrophorétiques, par décalage de la ligne et/ou de la colonne de départ pour l'affichage successif des pages successives. Par exemple, une première page (530, 830) peut être affichée à partir d'un premier emplacement, une deuxième page (630, 930) est affichée à partir d'un troisième emplacement, et ainsi de suite. Le décalage de l'emplacement de départ (par exemple la ligne et/ou la colonne) de chaque page par rapport à la page précédente permet de réduire de manière sensible les effets de rétention d'image dus aux mises à jour successives des images/textes, ce qui permet d'obtenir une image de meilleure qualité. on obtient également une réduction du besoin d'effacement ou de réinitialisation périodique de l'affichage afin d'éliminer les effets de rétention d'image, ce qui réduit la consommation d'énergie et favorise la facilité d'emploi.
PCT/IB2004/051604 2003-09-02 2004-08-30 Livre electronique a qualite d'image amelioree WO2005022502A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04769884A EP1665209A1 (fr) 2003-09-02 2004-08-30 Livre electronique a qualite d'image amelioree
JP2006525247A JP2007518111A (ja) 2003-09-02 2004-08-30 向上された画質を有する電子ブック

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49951303P 2003-09-02 2003-09-02
US60/499,513 2003-09-02

Publications (1)

Publication Number Publication Date
WO2005022502A1 true WO2005022502A1 (fr) 2005-03-10

Family

ID=34272830

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/051604 WO2005022502A1 (fr) 2003-09-02 2004-08-30 Livre electronique a qualite d'image amelioree

Country Status (6)

Country Link
EP (1) EP1665209A1 (fr)
JP (1) JP2007518111A (fr)
KR (1) KR20060132800A (fr)
CN (1) CN1846244A (fr)
TW (1) TW200517940A (fr)
WO (1) WO2005022502A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008224738A (ja) * 2007-03-08 2008-09-25 Bridgestone Corp 情報表示用パネルの活性化方法
WO2010148084A3 (fr) * 2009-06-17 2011-03-31 Microsoft Corporation Intégration de livre numérique et dispositifs d'affichage à interface de zoom

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101803552B1 (ko) * 2010-02-26 2017-11-30 가부시키가이샤 한도오따이 에네루기 켄큐쇼 표시 장치 및 이 표시 장치를 구비하는 전자 서적
CN106898309B (zh) * 2017-02-14 2019-05-31 华南师范大学 一种efd矩阵显示驱动方法和装置
CN109785801A (zh) * 2018-12-06 2019-05-21 青岛海信移动通信技术股份有限公司 一种墨水屏画面刷新的方法和设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010035874A1 (en) * 2000-04-27 2001-11-01 Pelco Method for prolonging CRT screen life by reduced phosphor burning
US6377275B1 (en) * 1998-04-27 2002-04-23 Samsung Electronics Co., Ltd. Method and apparatus for outputting an on-screen display of a display device
US20030076332A1 (en) * 2001-10-18 2003-04-24 Samsung Electronics Co., Ltd. Apparatus and method for eliminating afterimage state

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6377275B1 (en) * 1998-04-27 2002-04-23 Samsung Electronics Co., Ltd. Method and apparatus for outputting an on-screen display of a display device
US20010035874A1 (en) * 2000-04-27 2001-11-01 Pelco Method for prolonging CRT screen life by reduced phosphor burning
US20030076332A1 (en) * 2001-10-18 2003-04-24 Samsung Electronics Co., Ltd. Apparatus and method for eliminating afterimage state

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008224738A (ja) * 2007-03-08 2008-09-25 Bridgestone Corp 情報表示用パネルの活性化方法
WO2010148084A3 (fr) * 2009-06-17 2011-03-31 Microsoft Corporation Intégration de livre numérique et dispositifs d'affichage à interface de zoom
CN102460372A (zh) * 2009-06-17 2012-05-16 微软公司 集成数字图书以及变焦界面显示
US8533622B2 (en) 2009-06-17 2013-09-10 Microsoft Corporation Integrating digital book and zoom interface displays

Also Published As

Publication number Publication date
EP1665209A1 (fr) 2006-06-07
CN1846244A (zh) 2006-10-11
TW200517940A (en) 2005-06-01
KR20060132800A (ko) 2006-12-22
JP2007518111A (ja) 2007-07-05

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