EP0387034A2 - Dispositif d'affichage à cristaux liquides - Google Patents

Dispositif d'affichage à cristaux liquides Download PDF

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Publication number
EP0387034A2
EP0387034A2 EP9090302436A EP90302436A EP0387034A2 EP 0387034 A2 EP0387034 A2 EP 0387034A2 EP 9090302436 A EP9090302436 A EP 9090302436A EP 90302436 A EP90302436 A EP 90302436A EP 0387034 A2 EP0387034 A2 EP 0387034A2
Authority
EP
European Patent Office
Prior art keywords
display
liquid crystal
picture elements
crystal display
displayed
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP9090302436A
Other languages
German (de)
English (en)
Other versions
EP0387034A3 (fr
Inventor
Taiji Iizuka
Masao Obata
Masaki Arima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Publication of EP0387034A2 publication Critical patent/EP0387034A2/fr
Publication of EP0387034A3 publication Critical patent/EP0387034A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0232—Special driving of display border areas

Definitions

  • the present invention relates to a liquid crystal display for displaying characters, graphics or the like by driving a plurality of picture elements.
  • the conventional liquid crystal displays display characters, graphics or the like on the screen by properly selecting and driving a plurality of picture elements which are located in a matrix-like state.
  • a liquid crystal display in accordance with the present invention is characterized in that it comprises the following means; a display means having a plurality of picture elements; a display control means which on one hand releases selection signals for selecting picture elements to be displayed among a plurality of picture elements and on the other hand releases color set data for displaying a region with a fixed width in an optionally presettable color different from those of the contents(characters, graphics or the like) of a display along the circumference end of the screen of the display means, and; a display drive means for permitting the picture elements selected by the selection signals from the above-mentioned display control means to be displayed in an optionally presettable color according to the color set data.
  • the display control means transfers the selection signals and the color set data to the display drive means which drives picture elements located within the region with a fixed width along the circumference end of the screen of the display means.
  • the display drive means permits the display means to display a circumference region with a fixed width having an optionally preset color according to the color set data by driving the corresponding picture elements.
  • the selection signals are simultaneously transferred to the display drive means, which drives picture elements located in regions with a fixed width in the upper and lower ends of the screen. Accordingly, the picture elements in the regions with a fixed width in the upper and lower ends of the screen are simultaneously driven. Then, picture elements located in the regions with a fixed width in the right and left ends of the screen are scanned and driven successively from the top. In this way, the above-mentioned circumference region with a fixed width on the screen is displayed in an optionally preset color, an enhanced visual discernability for characters, graphics or the like near the edge of the screen can be obtained.
  • Fig. 1 shows a liquid crystal display which has picture elements of 640 x 480 which is driven using the dual-panel single-drive method.
  • This liquid crystal display is composed of two liquid crystal panels, 1 and 2, combined together as a display means.
  • Each liquid crystal panel, 1 or 2 has picture elements of 640 x 240.
  • the liquid crystal panel 1 has a plurality of terminals for scan electrodes, COM 1a to COM 240a (hereinafter called common electrode terminal group) as well as a plurality of terminals for display electrodes, SEG 1a to SEG 640a (hereinafter called segment electrode terminal group).
  • the liquid crystal panel 2 has a common electrode terminal group, COM 1b to COM 240b , as well as a segment electrode terminal group, SEG 1b to SEG 640b .
  • These common electrode terminal group and segment electrode terminal group are formed on respective different substrates(not shown) in thin film state. The two substrates are disposed opposite to each other so that they may hold liquid crystal in between, and one electrode group may intersect the other at right angles.
  • the common electrode terminal group, COM 1a to COM 240a which apply scan voltage to picture elements in the line direction among a plurality of picture elements located in a matrix-­like state, are respectively connected to a common electrode driver group, cDRV 1a to cDRV 240a as a display drive means.
  • the segment electrode terminal group, SEG 1a to SEG 640a which apply signal voltage to picture elements in the column direction, are respectively connected to a segment electrode driver group, sDRV 1a to SDRV 640a as a display drive means.
  • the common electrode terminal group, COM 1b to COM 240b , and the segment electrode terminal group, SEG 1b to SEG 640b are respectively connected to a common electrode driver group, cDRV 1b to cDRV 240b , and a segment electrode driver group, sDRV 1b to sDRV 640b ⁇
  • a common electrode terminal for the border COM 241a
  • COM 241a is additionally installed to the above-mentioned common electrode terminal group, and applies scan voltage to picture elements of one line located in the upper end border .
  • This terminal COM 241a is connected to a common electrode driver for the border , cDRV 241a, serving as a display drive means.
  • a segment electrode terminal for the left border , BDL 1a , and a segment electrode terminal for the right border , BDR 2a are additionally installed to the above-mentioned segment electrode terminal group, and respectively apply signal voltage to picture elements of each one column located in the left border and the right one.
  • These terminals, BDL 1a and BDR 2a are respectively connected to segment electrode drivers for the border, sBDL 1a and sBDR 2a,
  • a common electrode terminal for the border COM 241b
  • This terminal COM 241b is connected to a common electrode driver for the border , cDRV 241b .
  • segment electrode terminals for the borders, BDL 1b and BDR 2b are additionally installed to the above-mentioned segment electrode terminal group, and respectively apply signal voltage to picture elements of each one column located in the left border and the right one.
  • These terminals, BDL 1b and BDR 2b are respectively connected to segment electrode drivers for the borders , sBDL 1b and sBDR 2b .
  • these drivers are respectively connected to a liquid crystal display controller 3 as a display control means.
  • This controller 3 transfers selection signals for selecting picture elements to be displayed among a plurality of picture elements located in a matrix-like state as well as color set data concerning the color of the border (hereinafter called color data for the border) to a display drive means.
  • the color set data is presettable in an optional color different from those of characters, graphics or the like by the controller 3.
  • the selection signals for selecting picture elements to be displayed and the color data for the border predeterminately set by the controller 3 are released to respective above-mentioned common electrode drivers as well as to segment electrode drivers from the liquid crystal display controller 3.
  • the segment electrode driver group and the segment electrode drivers, sBDL 1a , sBDR 2a , sBDL 1b , sBDR 2b , of the liquid crystal panels 1 and 2 are simultaneously selected. Then, they apply signal voltage to the respective segment electrode terminals according to the predetermined color data for the border.
  • the common electrode drivers, cDRV 241a and cDRV 241b , of the liquid crystal panels 1 and 2 are selected to apply scan voltage to the common electrode terminals for the borders, COM 241a and COM 241b . Consequently, picture elements of the selected upper end one line as well as lower end one line are displayed in an optionally preset color as borders .
  • the common electrode driver cDRV 241a and the segment electrode driver sBDL 1a are simultaneously selected, signal voltage and scan voltage are applied to picture elements within regions corresponding to a line and a column shown with slanting lines, as is shown in Fig. 2(a).
  • the picture elements within a region with slanting lines intersected one another that is to say, only the picture element within a selected point(cDRV 241a, sBDL 1a ), wherein the signal voltage and the scan voltage are simultaneously applied, is displayed in an optionally presettable color as the border .
  • the other picture elements within non-selected points are not displayed.
  • the common electrode driver cDRV 241a and the segment electrode driver sBDR 2a are simultaneously selected, as is shown in Fig. 2(b), the picture element within a selected point(cDRV 241a , sBDR 2a ) is displayed in an optionally preset color as the border, and the other picture elements within non-selected points are not displayed.
  • the selected points consist of one entire line including the above-mentioned BDL 1a , as is shown in Fig. 2(c), and therefore all the picture elements corresponding to the one line of the upper end of the liquid crystal panel 1 are displayed in the optionally preset color as the border.
  • both the right border and left one are displayed in the optionally preset color, as shown in Fig. 2(f).
  • These picture element groups located in each one line of the right and left borders are also driven in a fixed cycle, but the borders can be always seen displayed by the afterimage effect of the eyes, as was mentioned before.
  • a liquid crystal display in accordance with the present invention is characterized in that it comprises the following means; a display means such as liquid crystal panels having a plurality of picture elements; a display control means, for example a liquid crystal display controller, which on one hand releases selection signals for selecting picture elements to be displayed among a plurality of picture elements and on the other hand releases color set data for displaying a region with a fixed width in an optionally presettable color different from those of the contents of a display along the circumference end of the screen of the display means, and; a display drive means, for example segment electrode drivers and common electrode drivers, which permits the picture elements, which are selected according to the selection signals from the above-mentioned display control means, to be displayed in an optionally presettable color according to the color set data.
  • a display control means for example a liquid crystal display controller, which on one hand releases selection signals for selecting picture elements to be displayed among a plurality of picture elements and on the other hand releases color set data for displaying a region with a fixed width in an optionally prese
  • region with the fixed width along the circumference end of the screen may be optionally set in a color which stands in contrast with those of characters, graphs or the like, it is certain that the contents of display are more easily discernable.
  • the display control means may release selection signals for simultaneously selecting picture elements which are located within both the upper end region with a fixed width and the lower end region with same to the display drive means for driving the picture elements, and therefore a burden for data transfer imposed on the display control means may be greatly 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)
  • Liquid Crystal Display Device Control (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
EP9090302436A 1989-03-07 1990-03-07 Dispositif d'affichage à cristaux liquides Withdrawn EP0387034A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP25633/89 1989-03-07
JP2563389U JPH02117590U (fr) 1989-03-07 1989-03-07

Publications (2)

Publication Number Publication Date
EP0387034A2 true EP0387034A2 (fr) 1990-09-12
EP0387034A3 EP0387034A3 (fr) 1991-04-10

Family

ID=12171267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP9090302436A Withdrawn EP0387034A3 (fr) 1989-03-07 1990-03-07 Dispositif d'affichage à cristaux liquides

Country Status (3)

Country Link
EP (1) EP0387034A3 (fr)
JP (1) JPH02117590U (fr)
CA (1) CA2008061C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0540346A1 (fr) * 1991-10-31 1993-05-05 Canon Kabushiki Kaisha Appareil d'affichage électro-optique et circuit d'attaque
WO2004010410A1 (fr) * 2002-07-23 2004-01-29 Research In Motion Limited Procede et dispositif de commande d'une zone de visualisation a cristaux liquides
EP1835485A1 (fr) * 2006-03-17 2007-09-19 LG Electronics Inc. Dispositif électroluminescent et son procédé de commande
US7742120B2 (en) 2002-05-08 2010-06-22 Shearline Precision Engineering Limited Image display device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001057838A1 (fr) * 2000-01-31 2001-08-09 Seiko Epson Corporation Dispositif electro-optique et son procede d'utilisation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283235A2 (fr) * 1987-03-14 1988-09-21 Sharp Kabushiki Kaisha Dispositif d'affichage à cristaux liquides
EP0289144A2 (fr) * 1987-03-31 1988-11-02 Canon Kabushiki Kaisha Dispositif d'affichage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283235A2 (fr) * 1987-03-14 1988-09-21 Sharp Kabushiki Kaisha Dispositif d'affichage à cristaux liquides
EP0289144A2 (fr) * 1987-03-31 1988-11-02 Canon Kabushiki Kaisha Dispositif d'affichage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE JOURNAL OF SOLID-STATE CIRCUITS vol. 23, no. 2, April 1988, pages 442-449, New York, US; K. M}HLEMANN: "A 30-V Row/Column Driver for Flat-Panel Liquid Crystal Displays" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0540346A1 (fr) * 1991-10-31 1993-05-05 Canon Kabushiki Kaisha Appareil d'affichage électro-optique et circuit d'attaque
US7742120B2 (en) 2002-05-08 2010-06-22 Shearline Precision Engineering Limited Image display device
WO2004010410A1 (fr) * 2002-07-23 2004-01-29 Research In Motion Limited Procede et dispositif de commande d'une zone de visualisation a cristaux liquides
EP1835485A1 (fr) * 2006-03-17 2007-09-19 LG Electronics Inc. Dispositif électroluminescent et son procédé de commande

Also Published As

Publication number Publication date
EP0387034A3 (fr) 1991-04-10
CA2008061C (fr) 1994-12-13
JPH02117590U (fr) 1990-09-20

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