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WO2010097836A1 - Dispositif de papier électronique et procédé de commande d'affichage pour papier électronique - Google Patents

Dispositif de papier électronique et procédé de commande d'affichage pour papier électronique Download PDF

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Publication number
WO2010097836A1
WO2010097836A1 PCT/JP2009/000868 JP2009000868W WO2010097836A1 WO 2010097836 A1 WO2010097836 A1 WO 2010097836A1 JP 2009000868 W JP2009000868 W JP 2009000868W WO 2010097836 A1 WO2010097836 A1 WO 2010097836A1
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WO
WIPO (PCT)
Prior art keywords
coordinate
coordinates
end point
start point
area
Prior art date
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Ceased
Application number
PCT/JP2009/000868
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English (en)
Japanese (ja)
Inventor
悴田剛
岡田麻衣子
細野俊明
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Fujitsu Frontech Ltd
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Fujitsu Frontech Ltd
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Publication date
Application filed by Fujitsu Frontech Ltd filed Critical Fujitsu Frontech Ltd
Priority to PCT/JP2009/000868 priority Critical patent/WO2010097836A1/fr
Priority to JP2011501348A priority patent/JP5276160B2/ja
Priority to TW099105009A priority patent/TW201037692A/zh
Publication of WO2010097836A1 publication Critical patent/WO2010097836A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • G09G3/36—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 liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3622—Control of matrices with row and column drivers using a passive matrix
    • G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/04—Partial updating of the display screen

Definitions

  • the present invention relates to an electronic paper device and an electronic paper display control method.
  • An electronic paper device using a liquid crystal display device having a memory property has been put into practical use. Since the electronic paper device does not need to supply power for display after rewriting information, a display device with low power consumption can be realized.
  • Patent Document 1 in a liquid crystal panel having a viewing area wider than the display area, a refreshing dummy electrode is provided outside the display area within the viewing area, and a voltage is applied to the dummy electrode, so that the outside of the display area is provided. It is described that the indentation or the like attached is erased.
  • Patent Document 2 describes that in a liquid crystal display device having a memory property and having a cholesteric phase, when partial rewriting is performed, correction is performed according to the amount of decrease in reflectance due to crosstalk in a region where rewriting is not performed. ing.
  • FIG. 6 is an explanatory diagram of the problem of partial rewriting of electronic paper. As shown in FIG. 6, when the user selects sample 2 on the selection screen for sample 1 and sample 2, the selection button for sample 2 is displayed in black. At this time, only the area surrounded by the dotted line in FIG. 6 including the selection button is rewritten.
  • Liquid crystal for example, cholesteric liquid crystal
  • Liquid crystal used for an electronic paper display device
  • the reflectance of the liquid crystal after the rewriting process is different between 20 ° C. and 5 ° C. That is, when the partial rewriting as described above is repeatedly performed, the temperature and humidity during the writing process to the area where the partial rewriting has been performed are the same as the temperature and humidity during the writing process to the area where the partial rewriting is not performed. If they are different from each other, the reflectance is different, so that the brightness difference is increased and the display quality is deteriorated.
  • JP 2002-162642 A Japanese Patent Laid-Open No. 2003-228044
  • An object of the present invention is to make a difference in brightness of a liquid crystal display unit due to partial rewriting inconspicuous in an electronic paper device.
  • An electronic paper device includes a liquid crystal display unit having a memory property, storage means for storing coordinates of the start point and end point of a region where partial rewriting is performed, and a region between the start point and end point of a region where partial rewriting is performed next.
  • a coordinate determination unit that determines whether or not a coordinate exists in the storage unit; and when the coordinate determination unit determines that a corresponding coordinate exists in the storage unit, the corresponding coordinate is deleted from the storage unit At the same time, the coordinate management means for storing the coordinates of the start point and end point of the area to be partially rewritten next in the storage means, and whether or not the number of coordinates stored in the storage means has reached a predetermined value is determined.
  • a coordinate number determination unit; and a display control unit configured to rewrite the entire liquid crystal display unit when the coordinate number determination unit determines that the number of coordinates stored in the storage unit has reached the predetermined value.
  • FIG. 1 is a diagram illustrating a configuration of an electronic paper device 11 according to an embodiment.
  • the electronic paper device 11 includes various application programs (group) 12, an electronic paper control unit 13 that performs display control of the electronic paper display unit 15, a video driver 14, an electronic paper display unit 15, a video RAM 16, and a driver circuit. 17.
  • the application program 12, the electronic paper control unit 13, and the video driver 14 are configured by software.
  • the electronic paper control unit 13 is a software module, and these functions are realized by a CPU (not shown).
  • the electronic paper display unit 15, the video RAM (hereinafter referred to as VRAM) 16, and the driver circuit 17 are configured by hardware.
  • the electronic paper display unit 15 is a memory-type liquid crystal display device.
  • the screen drawing instruction from the application program (group) 12 is output to the video driver 14.
  • the electronic paper control unit 13 monitors a drawing instruction from the application program 12, and performs partial rewriting or full screen rewriting based on the instructed drawing request range.
  • step S11 the work holding start point and end point are initialized (S11).
  • the initial values of the work holding start point and end point are set to the origin (0, 0).
  • the rewrite target area of the VRAM is monitored, and the start point A and end point B of the rewrite target area are acquired (S12).
  • the start point A of the VRAM rewrite target area is compared with the work holding start point a (initial value in the first determination) to determine which start point is the start point of a wider area. (S13).
  • step S14 When it is determined that the start point A of the rewrite target area of the VRAM 16 is a start point of an area wider than the work holding start point a (S13, a ⁇ A), the process proceeds to step S14, and the start point A is set as the work holding start point a. To do.
  • step S13 is performed by comparing the x coordinate of the start point A with the x coordinate of the work holding start point a.
  • the y coordinate of the starting point A is compared with the y coordinate of the work holding starting point a.
  • step S13 if it is determined in step S13 that the start point A of the rewrite target area of the VRAM 16 is the start point of the area narrower than the work holding start point a, the process proceeds to step S15, and then the end point is determined.
  • step S15 the end point B of the rewrite target area of the VRAM 16 is compared with the work holding end point b to determine which end point is the end point of the wider area.
  • step S16 When it is determined that the end point B of the rewrite target area of the VRAM 16 is an end point of an area wider than the work holding end point b (S15, b ⁇ B), the process proceeds to step S16, and the end point B is set as the work holding end point b. To do.
  • step S15 when it is determined in step S15 that the end point B of the rewrite target area of the VRAM 16 is an end point of an area narrower than the work holding end point b, the process proceeds to step S17.
  • the end point B of the area to be rewritten in the VRAM 16 is determined to be the end point of the area wider than the current work holding end point b by the processing in steps S15 and S16, the end point B is set as a new work holding end point b. It is stored in a storage unit such as a memory.
  • step S17 it is determined whether or not a certain monitoring time has elapsed.
  • the process returns to step S12 and the above-described processing is repeated.
  • the process proceeds to step S18, and the start point a and end point b of the rewrite target area are determined from the work holding start point a and end point b.
  • step S18 the process proceeds to step S19 in FIG. 3 (B in FIG. 3).
  • step S19 it is determined whether the drawing instruction is full screen rewriting.
  • the process proceeds to step S20, and the coordinates between the start point a and the end point b of the area where partial rewriting is performed next are stored in the storage unit (for example, , Memory).
  • step S20 for example, when the start point and end point of the area where partial rewriting is performed next are on the X axis (this is called horizontal rewriting), the x coordinate and end point of the start point a of the rewriting target area It is determined whether or not coordinates between x coordinates of b are stored in the storage unit. If the start point a and end point b of the area to be partially rewritten are on the Y axis (this is called vertical rewriting), the coordinates between the y coordinate of the start point a and the y coordinate of the end point b are stored in the storage unit. It is determined whether or not it is stored.
  • the coordinates of the start point and the end point stored in the storage unit will be described with reference to FIG.
  • the coordinates of the start point and end point of the area where partial rewriting has been performed are stored in a table 21 of a storage unit (for example, a memory) as shown in FIG.
  • the table 21 stores data indicating the direction (vertical or horizontal direction) of the partial rewrite area, the x-coordinate and y-coordinate of the start point, and the x-coordinate and y-coordinate of the end point in order of partial rewrite.
  • the horizontal direction is a case where the start point and the end point are on the X axis
  • the vertical direction is a case where the start point and the end point are on the Y axis.
  • step S20 in FIG. 3 it is determined whether or not the coordinates between the start point a and the end point b of the area to be partially rewritten next are registered in the storage unit, for example, the table 21 in FIG. Yes.
  • step S20 If it is determined in step S20 in FIG. 3 that the coordinates between the start point a and the end point b of the area where partial writing is performed do not exist in the storage unit (S20, does not exist), the process proceeds to step S22 and partial writing is performed this time.
  • the start point a and end point b of the area to be performed are stored in the storage unit.
  • the coordinates of the start point a and the end point b are stored in the table 21 of FIG.
  • step S23 it is determined whether or not the number of coordinates of the partial rewrite area held (stored) in the storage unit is greater than or equal to a predetermined value N (S23).
  • N a predetermined value
  • the process proceeds to step S24, and partial rewriting of the area specified by the start point a and the end point b is performed.
  • step S25 When the number of coordinates held in the storage unit is greater than or equal to the predetermined value N (S23, N ⁇ number of held coordinates), the process proceeds to step S25, and the entire screen is rewritten. By rewriting the entire screen, the brightness difference between the area where the partial rewriting is performed and the area where the partial rewriting is not performed is eliminated, so the coordinates held in the storage unit are cleared (S26). In the process of step S26, for example, a plurality of start point and end point coordinates stored in the table 21 of FIG. 4 are deleted.
  • step S19 when it is determined that the drawing instruction is to rewrite the entire screen (S19, all rewriting), the process proceeds to step S27, and the start point a and the end point b of the rewriting target area are temporarily stored in a memory or the like. Then, the entire screen specified by the start point a and the end point b is rewritten (S28).
  • step S24 or S28 If rewriting is completed in step S24 or S28, the process returns to step S11 (A in FIG. 32) and the above-described processing is repeated.
  • step S11 A in FIG. 32
  • the first partial rewrite after the entire rewrite is horizontal rewrite
  • the x coordinate of the start point of the rewrite area is x1
  • the x coordinate of the end point is x2.
  • the x coordinate x1 of the start point and the x coordinate x2 of the end point are obtained by the above-described rewrite processing. It is stored in a storage unit (for example, table 21).
  • the second partial rewrite is horizontal rewrite
  • the x coordinate of the start point of the rewrite area is x3
  • the x coordinate of the end point is x4.
  • the x coordinate x3 of the start point and the x coordinate x4 of the end point at that time are stored in the storage unit.
  • four x coordinates of x1, x2, x3, and x4 are stored in the storage unit.
  • the third partial rewrite is vertical rewrite
  • the y coordinate of the start point of the rewrite area is y1
  • the y coordinate of the end point is y2.
  • the start point y coordinate y1 and the end point y coordinate y2 are stored in the storage unit.
  • six coordinates x1, x2, x3, x4, y1, and y2 are stored in the storage unit.
  • the nth partial rewrite is horizontal rewrite
  • the x coordinate of the start point of the rewrite area is x5
  • the x coordinate of the end point is x6.
  • the coordinate x3 is deleted from the storage unit.
  • seven coordinates x2, x3, x4, x5, y1, and y2 are stored in the storage unit.
  • the coordinates of the start point and end point of the area where partial rewriting is performed are stored in the storage unit, and whether the coordinates between the start point and end point of the area where partial rewriting is performed next exist in the storage unit. It is determined whether or not the coordinates exist, and if the coordinates exist, the coordinates are deleted. Then, it is determined whether or not the number of coordinates stored in the storage unit is equal to or greater than a predetermined value N. When the number of coordinates becomes equal to or greater than the predetermined value N, the entire screen is rewritten. Thereby, it is possible to suppress a noticeable difference in brightness between the area where partial rewriting has been performed and another area.
  • the partial rewrite area when the partial rewrite area includes a part (or all) of the previous partial rewrite area, the coordinates of the start point or end point (start point and end point) of the area are deleted. Compared to the method of performing full rewrite when the number of rewrites reaches a certain value, the number of full rewrites can be reduced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (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)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

L'invention concerne un dispositif de papier électronique où la différence de luminosité d'une section d'affichage à cristaux liquides, résultant d'une réécriture partielle, est masquée. Les coordonnées du point de départ et du point de fin de la zone où a été effectuée la réécriture partielle sont conservées dans une section de stockage. Ensuite, on détermine si la coordonnée entre un point de départ (a) et un point de fin (b) de la zone où a été effectuée la réécriture partielle est conservée ou non dans la section de stockage (S20). Si la coordonnée est conservée dans la section de stockage, la coordonnée est effacée (S21). On détermine si le nombre de coordonnées conservées dans la section de stockage a atteint une valeur prédéterminée (S23). Lorsqu'il est déterminé que le nombre de coordonnées conservées dans la section de stockage a atteint la valeur prédéterminée, la réécriture complète de la section d'affichage à cristaux liquides est effectuée (S25).
PCT/JP2009/000868 2009-02-26 2009-02-26 Dispositif de papier électronique et procédé de commande d'affichage pour papier électronique Ceased WO2010097836A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2009/000868 WO2010097836A1 (fr) 2009-02-26 2009-02-26 Dispositif de papier électronique et procédé de commande d'affichage pour papier électronique
JP2011501348A JP5276160B2 (ja) 2009-02-26 2009-02-26 電子ペーパー装置及び電子ペーパーの表示制御方法
TW099105009A TW201037692A (en) 2009-02-26 2010-02-22 Electronic paper device and display control method for electronic paper

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PCT/JP2009/000868 WO2010097836A1 (fr) 2009-02-26 2009-02-26 Dispositif de papier électronique et procédé de commande d'affichage pour papier électronique

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112703555A (zh) * 2018-02-26 2021-04-23 先端科技株式会社 电子显示装置及电子显示方法
WO2025213351A1 (fr) * 2024-04-09 2025-10-16 虹彩光电股份有限公司 Appareil d'affichage à papier électronique et son procédé de mise à jour

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03109524A (ja) * 1989-06-26 1991-05-09 Matsushita Electric Ind Co Ltd 表示パネルの駆動方法と表示装置
JPH05323281A (ja) * 1992-05-19 1993-12-07 Canon Inc 表示制御装置及び方法
WO2008038358A1 (fr) * 2006-09-28 2008-04-03 Fujitsu Limited Élément d'affichage et procédé de réécriture d'une image de l'élément d'affichage, papier électronique comprenant cet élément d'affichage, et terminal électronique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03109524A (ja) * 1989-06-26 1991-05-09 Matsushita Electric Ind Co Ltd 表示パネルの駆動方法と表示装置
JPH05323281A (ja) * 1992-05-19 1993-12-07 Canon Inc 表示制御装置及び方法
WO2008038358A1 (fr) * 2006-09-28 2008-04-03 Fujitsu Limited Élément d'affichage et procédé de réécriture d'une image de l'élément d'affichage, papier électronique comprenant cet élément d'affichage, et terminal électronique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112703555A (zh) * 2018-02-26 2021-04-23 先端科技株式会社 电子显示装置及电子显示方法
WO2025213351A1 (fr) * 2024-04-09 2025-10-16 虹彩光电股份有限公司 Appareil d'affichage à papier électronique et son procédé de mise à jour

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JPWO2010097836A1 (ja) 2012-08-30
TW201037692A (en) 2010-10-16
JP5276160B2 (ja) 2013-08-28

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