CA2008061C - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- CA2008061C CA2008061C CA 2008061 CA2008061A CA2008061C CA 2008061 C CA2008061 C CA 2008061C CA 2008061 CA2008061 CA 2008061 CA 2008061 A CA2008061 A CA 2008061A CA 2008061 C CA2008061 C CA 2008061C
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- Prior art keywords
- display
- display region
- liquid crystal
- picture elements
- common electrode
- Prior art date
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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
- G09G3/36—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
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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)
Abstract
ABSTRACT OF THE DISCLOSURE
A liquid crystal display in accordance with the present invention provides a display having a plurality of picture elements; a display control device which on one hand releases selection signals for selecting picture elements to be displayed and on the other hand releases color set data for displaying a border in an optionally presettable color different from the contents of a display along the periphery end of the screen of the display device, and a display drive device for driving the picture elements according to the output of the above-mentioned display control device. In this composition, by setting a border in an optionally presettable color along the periphery of the screen of the display, enhanced discernability is obtained with respect to characters, graphics or the like displayed near the edge of the screen.
A liquid crystal display in accordance with the present invention provides a display having a plurality of picture elements; a display control device which on one hand releases selection signals for selecting picture elements to be displayed and on the other hand releases color set data for displaying a border in an optionally presettable color different from the contents of a display along the periphery end of the screen of the display device, and a display drive device for driving the picture elements according to the output of the above-mentioned display control device. In this composition, by setting a border in an optionally presettable color along the periphery of the screen of the display, enhanced discernability is obtained with respect to characters, graphics or the like displayed near the edge of the screen.
Description
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 disposed in two dimensional matrix.
However, in the above-mentioned conventional liquid crystal displays, when characters, graphics or the like are displayed by picture elements located at the periphery of the screen such as at the top or bottom, or the right or left sides, it is difficult to distinguish them fro~ the end of the screen, and depending on the shape of them, the characters, graphics or the like are sometimes seen as being overlapped with the end of the screen.
Consequently, there are problems in that the visual discernability between the characters, graphics and the like and the screen edge is not high enough, near the borders and therefore it is difficult to clearly discern the contents of the display.
It is an object of the present invention to provide a liquid crystal display wherein an enhanced discernability is obtained with respect to charactsrs, graphics or the like displayed near the edge of a display screen, by setting a fixed width border around the display screen and displaying the border in an optional color different from those of characters, graphics or the like displayed in the display screen.
It is another object of the invention to provide a liquid crystal display whose display control means installed therein release selection signals for :
. .
.
simultaneously selecting picture elements which are located within both the upper border and the lower border of the display screen to a display drive means for driving the picture elements, and therefore; which may reduce a burden for data transfer imposed on the display control means therein.
Accordingly, the present invention provides a li~uid crystal display comprising: a display means comprising a plurality of picture elements, the picture elements forming a first display region for information display and a second display region forming a fixed-width border about the periphery of the first display region;
display control means for providing control data for the second display region; driver means for controlling the second display region, the driver means being under control of the control data; and wherein the second display region is displayed in an optional colour differing from that of the first display region.
The present invention further provides a liquid crystal display comprising: a display means comprising a plurality of picture elements, the picture elements forming a first display region for information display and, a second display region forming a fixed-width border about the periphery of the first display region; a display control means for releasing selection signals for selecting picture elements to be displayed in the second display region, and releasing colour set data for displaying portions of the second display region in an optionally presettable colour different from that of the contents of the first display region; and a display drive means for permitting the portions of the second display region selected by the selection signals to be displayed in an optionally preset colour according to the colour set data.
In the above-mentioned composition, 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 border region of the display means. When the selection signals and color set data are entered to it, the display drive means permits the display means to display a border region with a fixed width with an optionally preset color according to the color set data by driving the corresponding picture elements.
More specifically, 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.
The invention will be more readily understood from the following description of a preferred embodiment thereof given, by way of example, with reference to the accompanying drawings, in which: Figure 1 and Figure 2 show one way of preferred embodiment of the present invention.
Figure 1 is a schematic block diagram showing a ,;. . . .
~ . ;.', ;' ' .
composition of a liquid crystal display.
Figures 2(a) to (f) show schematic illustrations showing display conditions in a circumference end of a screen of a display means.
5One embodiment of the present invention is described in detail below with reference to drawings, Figure 1 and Figure 2.
Figure 1 shows a liquid crystal display which has picture elements disposed in a 640 x 480 matrix 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 and 2, comprises a matrix of 640 x 240 picture elements.
15The liquid crystal panel 1 has a plurality of terminals for scan electrodes, COM~4 to COM24~ (hereinafter called common electrode terminal group) as well as a plurality of terminals for display electrodes SEG~, to SEG~
~hereinafter called segment electrode terminal group).
Similarly, the liquid crystal panel 2 has a common electrode terminal group, COM~b to COM24~, as well as a segment electrode terminal group, SEGIb to SEG~. The common electrode terminal group and the segment electrode terminal group are formed on respective substrates (not shown) as a thin film. The two substrates are disposed opposite to each other so that they hold liquid crystal between them, and one electrode group intersects the other at right angles.
As to the liquid crystal panel l, the common electrode terminal group, COMI~ to COM24~, which apply a scan voltage to the picture elements in a horizontal or line ' ~ ' ': ' direcl:ion are respectively connected to a common electrode driver group, cDRV~a to cDRV240a as a display drive means. On the other hand, the segment electrode terminal group, SEG
to SEG~, which apply a signal voltage to the picture elements in a vertical or columnar direction, are respectively connected to a segment electrode driver group, sDRV~ to sDRV~ as a display drive means.
Similarly, in the liquid crystal panel 2, the common electrode terminal group, COM1b to COM24~, and the segment electrode terminal group, SEG,b to SEG~, are respectively c~nnected to a common electrode driver group, comprising cDRVIb to cDRV~, and a segment electrode driver group, comprising sDRVIb to sDRV~.
In this embodiment, the region with a fixed width along the periphery of a display screen is defined as a border or a second display region. In the liquid crystal panel 1, a common electrode terminal for the boarder, COM24l~, is additionally installed in the common electrode terminal group, and applies a scan voltage to picture elements of one line located in the upper or top border.
This terminal COM241~ is connected to a common electrode driver for the border, cD~V24~a, serving as a display drive means. A segment electrode terminal for the le~t border, BDL~, and a segment electrode terminal for the right border, BDR2~, are additionally installed in the segment electrode texminal group, and respectively apply signal voltages to the picture elements of one column each, located in the left and right borders. These terminals BDLI, and BDR2" are respectively connected to segment electrode drivers for the bordex, sBDL~a and sBDR2~, which serves a~ a display drive means.
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Similarly, in the liquid crystal panel 2, a common electrode terminal for the border, COM24~b, is addit:ionally installed in the common electrode terminal group, and applies a scan voltage to picture elements of one line loc~ted in the lower or bottom border. This terminal COM241b is connected to a common electrode driver for the border, cDRV~b. Moreover, segment electrode - terminals for the borders, BDLIb and BDR2b, are additionally installed in the segment electrode terminal group, and respectively apply signal voltages to picture elements of one column each located in the left and the right borders.
These terminals, BDL~b and BDR2b, are respectively connected to the segment electrode drivers for the borders, sBD~b and sBDR2b .
Moreover, 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.
In the above-mentioned composition, synchronizing to vertical synchronous signals, YD~ generated by the liquid crystal display 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~ 3 are released to respective above-mentioned common electrode drivers as well as to segment electrode drivers from the liquid crystal display controller 3.
More specifically, the segment electrode driver group and the segment electrode drivers, sBDLI,, sBDR~, sBDLIb, sBDR2b, of the liquid crystal panels 1 and 2 are simultaneously selected in response to a second seIection signal. They then apply signal voltage to the respective segment electrode terminals according to the predetermined color data for the border. At the same time, as is shown in Figure 1, the common electrode drivers, cDRV~I~ and 1~ cDRV24lb, of the liquid crystal panels 1 and 2 are selected to apply scan voltage to the common electrode terminals for the border, COM~I~ and COM24~b. Consequently, picture elements of the selected upper border as well as the lower border are displayed in an optionally preset color as borders.
Hereupon, a more concrete explanation is given on the process in which the picture element groups in the borders are driven, and displayed in an optionally presettable color. The coordinates of a plurality of picture elements located in a matrix-like state are expressed as (cDRV;, sDRV;) by using the signs of the common electrode drivers and the segment electrode drivers. The subscript i stands for the identifier each electrode driver has.
As is shown in Figure 2~a), for example, when the common electrode driver cDRV~I~ and the segment electrode driver sBDL~ are simultaneously selected, signal scan voltages are applied to the picture elements within the regions corresponding to a line and a column as is shown with slanting lines. However, as shown in the figure, the picture elements within the region where the slanting lines ,~
;' ~'` :
: . .: ' - ~ . , inter~sect one another, that is to say, only the picture element within a selected point (cDRV241~, sBDLI~), wherein the signal voltage and the scan voltage are simultaneously applied, is displayed as the border in the optionally presettable color. The other picture elements within the non-selected points are not displayed. Similarly, when the common electrode driver cDRV24~ and the segment electrode driver sBD~ are simultaneously selected, as is shown in Figure 2(b), the picture element within the selected point (cDRV24l~, sBDR2~) is displayed in the optionally preset color as the border, and the other picture elements within non-selected points are not displayed.
Similarly, as is shown in Figure 2(c), when the common electrode driver cDRV24~, and the liquid crystal panel 1 segment electrode group are simultaneously selected, by the first selection signal the selected points consist of one entire line including the abo~e-mentioned sBDLI~.
Therefore, all the picture elements corresponding to one line of the upper border of the liquid crystal panel 1 are displayed in the optionally preset color as the border.
As is shown in Figure 2(d), when the common electrode driver cDRV24~ and the liquid crystal panel 2 segment electrode group are simultaneously selected by the first selection signal, all the picture elements corresponding to one line of the lower border of the liquid crystal panel 2 are displayed in the optionally preset color as the border. As is indicated above, the upper border and the lower border of panels 1 and 2 respectively are simultaneously displayed in the optionally preset color.
However, since the common electrode drivers, ~.
cDRV24~ as well as cDRV~4lb, and the segment electrode driver group are selected in a fixed cycle, the picture element groups located in both the upper and lower borders are also driven in the fixed cycle. The borders, however, are always visible due to the afterimage effect of the eyes.
In accordance with the second selection signal and color data for the border from the liquid crystal display controller 3, when segment electrode drivers for the borders, sBDLI~, sBDR2~, sBDLIb, and sBDR2b are selected and common electrode driver groups, (cDRVl~ to cDRV~ as well as cDRVIb to cDRV24~) are successively scanned from the cDRV
side, the right and left borders of liquid crystal panels 1 and 2 are successively displayed in the optionally preset color according to the scan, as is shown in Figure 2(e~.
On finishing scannin~ the common electrode driver, c~RV2~, both the right border and left one are displayed in the optionally preset color, as shown in Figure 2(f). These picture element groups located in each of the right and left borders are also driven in a fixed cycle, but the borders are always visi~le due to the afterimage effect of the eyes, as was mentioned before.
In this way, the upper and lower borders as well as the right and left ones of the liquid crystal displays 1 and 2 are displayed in the optionally preset color by performing the above-mentioned procedures repeatedly.
As is discussed above, 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 :
., , , first and second selection signals for selecting picture elements and on the other hand releases color set data for displaying the 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.
In this composition, by setting a region having a fixed width and an optionally presettable color along the periphery of the screen of the display means of the liquid crystal display, an enhanced discernability is obtained with respect to characters, graphics or the like displayed near the edge of the display screen.
Furthermore, since the border of the screen may be optionally set in a color which stands in contrast with those of characters, graphs or the like, the contents of display are more readily discernable.
In addition, the display control means releases to the display drive means for driving the picture elements, selection signals for simultaneously seleating picture elements which are located within both the upper border and the lower border, and therefore the burden of data transfer imposed on the display control means can be greatly reduced. The invention being thus described, it may be obvious that the same way be varied in many ways. Such variations are not to be regarded as a departure from the scope of the invention.
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.
There are described above novel features which the skilled man will appreciate give rise to advantages.
These are each independent aspects of the invention to be covered by the present application, irrespective of whether or not they are included with the scope of the following claims.
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The conventional liquid crystal displays display characters, graphics or the like on the screen by properly selecting and driving a plurality of picture elements disposed in two dimensional matrix.
However, in the above-mentioned conventional liquid crystal displays, when characters, graphics or the like are displayed by picture elements located at the periphery of the screen such as at the top or bottom, or the right or left sides, it is difficult to distinguish them fro~ the end of the screen, and depending on the shape of them, the characters, graphics or the like are sometimes seen as being overlapped with the end of the screen.
Consequently, there are problems in that the visual discernability between the characters, graphics and the like and the screen edge is not high enough, near the borders and therefore it is difficult to clearly discern the contents of the display.
It is an object of the present invention to provide a liquid crystal display wherein an enhanced discernability is obtained with respect to charactsrs, graphics or the like displayed near the edge of a display screen, by setting a fixed width border around the display screen and displaying the border in an optional color different from those of characters, graphics or the like displayed in the display screen.
It is another object of the invention to provide a liquid crystal display whose display control means installed therein release selection signals for :
. .
.
simultaneously selecting picture elements which are located within both the upper border and the lower border of the display screen to a display drive means for driving the picture elements, and therefore; which may reduce a burden for data transfer imposed on the display control means therein.
Accordingly, the present invention provides a li~uid crystal display comprising: a display means comprising a plurality of picture elements, the picture elements forming a first display region for information display and a second display region forming a fixed-width border about the periphery of the first display region;
display control means for providing control data for the second display region; driver means for controlling the second display region, the driver means being under control of the control data; and wherein the second display region is displayed in an optional colour differing from that of the first display region.
The present invention further provides a liquid crystal display comprising: a display means comprising a plurality of picture elements, the picture elements forming a first display region for information display and, a second display region forming a fixed-width border about the periphery of the first display region; a display control means for releasing selection signals for selecting picture elements to be displayed in the second display region, and releasing colour set data for displaying portions of the second display region in an optionally presettable colour different from that of the contents of the first display region; and a display drive means for permitting the portions of the second display region selected by the selection signals to be displayed in an optionally preset colour according to the colour set data.
In the above-mentioned composition, 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 border region of the display means. When the selection signals and color set data are entered to it, the display drive means permits the display means to display a border region with a fixed width with an optionally preset color according to the color set data by driving the corresponding picture elements.
More specifically, 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.
The invention will be more readily understood from the following description of a preferred embodiment thereof given, by way of example, with reference to the accompanying drawings, in which: Figure 1 and Figure 2 show one way of preferred embodiment of the present invention.
Figure 1 is a schematic block diagram showing a ,;. . . .
~ . ;.', ;' ' .
composition of a liquid crystal display.
Figures 2(a) to (f) show schematic illustrations showing display conditions in a circumference end of a screen of a display means.
5One embodiment of the present invention is described in detail below with reference to drawings, Figure 1 and Figure 2.
Figure 1 shows a liquid crystal display which has picture elements disposed in a 640 x 480 matrix 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 and 2, comprises a matrix of 640 x 240 picture elements.
15The liquid crystal panel 1 has a plurality of terminals for scan electrodes, COM~4 to COM24~ (hereinafter called common electrode terminal group) as well as a plurality of terminals for display electrodes SEG~, to SEG~
~hereinafter called segment electrode terminal group).
Similarly, the liquid crystal panel 2 has a common electrode terminal group, COM~b to COM24~, as well as a segment electrode terminal group, SEGIb to SEG~. The common electrode terminal group and the segment electrode terminal group are formed on respective substrates (not shown) as a thin film. The two substrates are disposed opposite to each other so that they hold liquid crystal between them, and one electrode group intersects the other at right angles.
As to the liquid crystal panel l, the common electrode terminal group, COMI~ to COM24~, which apply a scan voltage to the picture elements in a horizontal or line ' ~ ' ': ' direcl:ion are respectively connected to a common electrode driver group, cDRV~a to cDRV240a as a display drive means. On the other hand, the segment electrode terminal group, SEG
to SEG~, which apply a signal voltage to the picture elements in a vertical or columnar direction, are respectively connected to a segment electrode driver group, sDRV~ to sDRV~ as a display drive means.
Similarly, in the liquid crystal panel 2, the common electrode terminal group, COM1b to COM24~, and the segment electrode terminal group, SEG,b to SEG~, are respectively c~nnected to a common electrode driver group, comprising cDRVIb to cDRV~, and a segment electrode driver group, comprising sDRVIb to sDRV~.
In this embodiment, the region with a fixed width along the periphery of a display screen is defined as a border or a second display region. In the liquid crystal panel 1, a common electrode terminal for the boarder, COM24l~, is additionally installed in the common electrode terminal group, and applies a scan voltage to picture elements of one line located in the upper or top border.
This terminal COM241~ is connected to a common electrode driver for the border, cD~V24~a, serving as a display drive means. A segment electrode terminal for the le~t border, BDL~, and a segment electrode terminal for the right border, BDR2~, are additionally installed in the segment electrode texminal group, and respectively apply signal voltages to the picture elements of one column each, located in the left and right borders. These terminals BDLI, and BDR2" are respectively connected to segment electrode drivers for the bordex, sBDL~a and sBDR2~, which serves a~ a display drive means.
-., - . , .
,~ ..... ~ .
Similarly, in the liquid crystal panel 2, a common electrode terminal for the border, COM24~b, is addit:ionally installed in the common electrode terminal group, and applies a scan voltage to picture elements of one line loc~ted in the lower or bottom border. This terminal COM241b is connected to a common electrode driver for the border, cDRV~b. Moreover, segment electrode - terminals for the borders, BDLIb and BDR2b, are additionally installed in the segment electrode terminal group, and respectively apply signal voltages to picture elements of one column each located in the left and the right borders.
These terminals, BDL~b and BDR2b, are respectively connected to the segment electrode drivers for the borders, sBD~b and sBDR2b .
Moreover, 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.
In the above-mentioned composition, synchronizing to vertical synchronous signals, YD~ generated by the liquid crystal display 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~ 3 are released to respective above-mentioned common electrode drivers as well as to segment electrode drivers from the liquid crystal display controller 3.
More specifically, the segment electrode driver group and the segment electrode drivers, sBDLI,, sBDR~, sBDLIb, sBDR2b, of the liquid crystal panels 1 and 2 are simultaneously selected in response to a second seIection signal. They then apply signal voltage to the respective segment electrode terminals according to the predetermined color data for the border. At the same time, as is shown in Figure 1, the common electrode drivers, cDRV~I~ and 1~ cDRV24lb, of the liquid crystal panels 1 and 2 are selected to apply scan voltage to the common electrode terminals for the border, COM~I~ and COM24~b. Consequently, picture elements of the selected upper border as well as the lower border are displayed in an optionally preset color as borders.
Hereupon, a more concrete explanation is given on the process in which the picture element groups in the borders are driven, and displayed in an optionally presettable color. The coordinates of a plurality of picture elements located in a matrix-like state are expressed as (cDRV;, sDRV;) by using the signs of the common electrode drivers and the segment electrode drivers. The subscript i stands for the identifier each electrode driver has.
As is shown in Figure 2~a), for example, when the common electrode driver cDRV~I~ and the segment electrode driver sBDL~ are simultaneously selected, signal scan voltages are applied to the picture elements within the regions corresponding to a line and a column as is shown with slanting lines. However, as shown in the figure, the picture elements within the region where the slanting lines ,~
;' ~'` :
: . .: ' - ~ . , inter~sect one another, that is to say, only the picture element within a selected point (cDRV241~, sBDLI~), wherein the signal voltage and the scan voltage are simultaneously applied, is displayed as the border in the optionally presettable color. The other picture elements within the non-selected points are not displayed. Similarly, when the common electrode driver cDRV24~ and the segment electrode driver sBD~ are simultaneously selected, as is shown in Figure 2(b), the picture element within the selected point (cDRV24l~, sBDR2~) is displayed in the optionally preset color as the border, and the other picture elements within non-selected points are not displayed.
Similarly, as is shown in Figure 2(c), when the common electrode driver cDRV24~, and the liquid crystal panel 1 segment electrode group are simultaneously selected, by the first selection signal the selected points consist of one entire line including the abo~e-mentioned sBDLI~.
Therefore, all the picture elements corresponding to one line of the upper border of the liquid crystal panel 1 are displayed in the optionally preset color as the border.
As is shown in Figure 2(d), when the common electrode driver cDRV24~ and the liquid crystal panel 2 segment electrode group are simultaneously selected by the first selection signal, all the picture elements corresponding to one line of the lower border of the liquid crystal panel 2 are displayed in the optionally preset color as the border. As is indicated above, the upper border and the lower border of panels 1 and 2 respectively are simultaneously displayed in the optionally preset color.
However, since the common electrode drivers, ~.
cDRV24~ as well as cDRV~4lb, and the segment electrode driver group are selected in a fixed cycle, the picture element groups located in both the upper and lower borders are also driven in the fixed cycle. The borders, however, are always visible due to the afterimage effect of the eyes.
In accordance with the second selection signal and color data for the border from the liquid crystal display controller 3, when segment electrode drivers for the borders, sBDLI~, sBDR2~, sBDLIb, and sBDR2b are selected and common electrode driver groups, (cDRVl~ to cDRV~ as well as cDRVIb to cDRV24~) are successively scanned from the cDRV
side, the right and left borders of liquid crystal panels 1 and 2 are successively displayed in the optionally preset color according to the scan, as is shown in Figure 2(e~.
On finishing scannin~ the common electrode driver, c~RV2~, both the right border and left one are displayed in the optionally preset color, as shown in Figure 2(f). These picture element groups located in each of the right and left borders are also driven in a fixed cycle, but the borders are always visi~le due to the afterimage effect of the eyes, as was mentioned before.
In this way, the upper and lower borders as well as the right and left ones of the liquid crystal displays 1 and 2 are displayed in the optionally preset color by performing the above-mentioned procedures repeatedly.
As is discussed above, 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 :
., , , first and second selection signals for selecting picture elements and on the other hand releases color set data for displaying the 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.
In this composition, by setting a region having a fixed width and an optionally presettable color along the periphery of the screen of the display means of the liquid crystal display, an enhanced discernability is obtained with respect to characters, graphics or the like displayed near the edge of the display screen.
Furthermore, since the border of the screen may be optionally set in a color which stands in contrast with those of characters, graphs or the like, the contents of display are more readily discernable.
In addition, the display control means releases to the display drive means for driving the picture elements, selection signals for simultaneously seleating picture elements which are located within both the upper border and the lower border, and therefore the burden of data transfer imposed on the display control means can be greatly reduced. The invention being thus described, it may be obvious that the same way be varied in many ways. Such variations are not to be regarded as a departure from the scope of the invention.
~ ~i .. .
.
There are described above novel features which the skilled man will appreciate give rise to advantages.
These are each independent aspects of the invention to be covered by the present application, irrespective of whether or not they are included with the scope of the following claims.
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$ ' ~,
Claims (12)
1. A liquid crystal display comprising:
a display means comprising a plurality of picture elements, said picture elements forming a first display region for information display and a second display region forming a fixed-width border about the periphery of said first display region;
display control means for providing control data for said second display region;
driver means for controlling said second display region, said driver means being under control of said control data; and wherein said second display region is displayed in an optional colour differing from that of said first display region.
a display means comprising a plurality of picture elements, said picture elements forming a first display region for information display and a second display region forming a fixed-width border about the periphery of said first display region;
display control means for providing control data for said second display region;
driver means for controlling said second display region, said driver means being under control of said control data; and wherein said second display region is displayed in an optional colour differing from that of said first display region.
2. A liquid crystal display comprising:
a display means comprising a plurality of picture elements, said picture elements forming a first display region for information display and, a second display region forming a fixed-width border about the periphery of said first display region;
a display control means for releasing selection signals for selecting picture elements to be displayed in said second display region, and releasing colour set data for displaying portions of said second display region in an optionally presettable colour different from that of the contents of the first display region; and a display drive means for permitting said portions of said second display region selected by the selection signals to be displayed in an optionally preset colour according to the colour set data.
a display means comprising a plurality of picture elements, said picture elements forming a first display region for information display and, a second display region forming a fixed-width border about the periphery of said first display region;
a display control means for releasing selection signals for selecting picture elements to be displayed in said second display region, and releasing colour set data for displaying portions of said second display region in an optionally presettable colour different from that of the contents of the first display region; and a display drive means for permitting said portions of said second display region selected by the selection signals to be displayed in an optionally preset colour according to the colour set data.
3. A liquid crystal display as defined in claim 2, which comprises two combined liquid crystal panels, each said panel having a plurality of picture elements; and wherein said liquid crystal panels are driven using the dual-panel single-drive method.
4. A liquid crystal display as defined in claim 2 or 3, wherein said display control means comprises a liquid crystal display controller for producing vertical synchronous signals.
5. A liquid crystal display as defined in claim 4, wherein said liquid crystal display controller provides to the display drive means;
selection signals for selecting picture elements of said second display region to be displayed, by synchronizing the output of selection signals to vertical synchronous signals, and colour set data for displaying said second display means in an optionally preset colour which contrasts with that of the contents of said first display region, by synchronizing the output of colour set data to the vertical synchronous signals.
selection signals for selecting picture elements of said second display region to be displayed, by synchronizing the output of selection signals to vertical synchronous signals, and colour set data for displaying said second display means in an optionally preset colour which contrasts with that of the contents of said first display region, by synchronizing the output of colour set data to the vertical synchronous signals.
6. A liquid crystal display as defined in claim 5, wherein said liquid crystal display controller releases:
a first selection signal to said display drive means so as to simultaneously select both the upper portion of said second display region and the lower portion of said second display region;
a second selection signal to said display drive means so as to simultaneously select both the right side of said second display region and the left side of said second display region; and wherein said upper and lower portions of said second display region and said left and right sides of said second display region each form a fixed-width border comprising a plurality of picture elements.
a first selection signal to said display drive means so as to simultaneously select both the upper portion of said second display region and the lower portion of said second display region;
a second selection signal to said display drive means so as to simultaneously select both the right side of said second display region and the left side of said second display region; and wherein said upper and lower portions of said second display region and said left and right sides of said second display region each form a fixed-width border comprising a plurality of picture elements.
7. A liquid crystal display as defined in claim 6, wherein said display drive means comprises:
common electrode driver groups connected to common electrode terminal groups for applying scanning voltage to picture elements in the line direction of said display means;
common electrode drivers each of which is connected to respective common electrode terminals for said second display region for applying scan voltage to said plurality of picture elements disposed in said upper portion and said lower portion of said second display region;
segment electrode driver groups connected to segment electrode terminal groups for applying signal voltage to picture elements in the columnar direction of said display means; and segment electrode drivers each of which is connected to respective segment electrode terminals of said second display region for applying signal voltage to picture elements located in the left and right sides of said second display region.
common electrode driver groups connected to common electrode terminal groups for applying scanning voltage to picture elements in the line direction of said display means;
common electrode drivers each of which is connected to respective common electrode terminals for said second display region for applying scan voltage to said plurality of picture elements disposed in said upper portion and said lower portion of said second display region;
segment electrode driver groups connected to segment electrode terminal groups for applying signal voltage to picture elements in the columnar direction of said display means; and segment electrode drivers each of which is connected to respective segment electrode terminals of said second display region for applying signal voltage to picture elements located in the left and right sides of said second display region.
8. A liquid crystal display as defined in claim 7, wherein said liquid crystal panel is composed so that the common electrode terminal group and the segment electrode terminal group, which are formed on respective different substrates in thin film state, are disposed opposite to each other so as to intersect each other at right angles and to hold liquid crystal disposed therebetween.
9. A liquid crystal display as defined in claim 8, wherein, when at least one common electrode driver and at least two segment electrode drivers are simultaneously selected, only said picture elements located at the selected points for which both of the signal voltage and the scan voltage are simultaneously applied are displayed in the optionally preset colour as the second display region, and picture elements located in the other non-selected points are not displayed.
10. A liquid crystal display as defined in claim 9, wherein, when the common electrode drivers for said upper and lower portions of said second display region, and all the segment electrode groups are simultaneously selected, the picture elements located in the upper and lower portions of said second display region of the liquid crystal panels are simultaneously displayed in an optionally preset colour as a border.
11. A liquid crystal display as defined in claim 10, wherein in accordance with selection signals and colour set data for the border from the liquid crystal display controller, when each segment electrode driver for each column of the right and left sides of said second display region of the liquid crystal panels is selected and the common electrode driver groups are successively scanned, the right and left sides of said second display region of the liquid crystal panels are successively displayed in an optionally preset colour in the scan.
12. A liquid crystal display as defined in claim 9, wherein said display control means is adapted to provide a first selection signal, a second selection signal and color set data for said second display region, said second display region comprising an upper, a lower, a right and a left border;
said first selection signal selecting simultaneously said common electrode drivers which drive the picture elements of said upper and said lower borders of said second display region and, selecting sequentially, said segment electrode drivers which drive the said picture elements;
said second selection signal selecting simultaneously segment electrode drivers which drive the picture elements of said left and said right borders of said second display region and, selecting sequentially, said common electrode drivers which drive said the picture elements; and said color set data controlling the color of said second display region, wherein said color is an optional color differing from that of said first display region.
said first selection signal selecting simultaneously said common electrode drivers which drive the picture elements of said upper and said lower borders of said second display region and, selecting sequentially, said segment electrode drivers which drive the said picture elements;
said second selection signal selecting simultaneously segment electrode drivers which drive the picture elements of said left and said right borders of said second display region and, selecting sequentially, said common electrode drivers which drive said the picture elements; and said color set data controlling the color of said second display region, wherein said color is an optional color differing from that of said first display region.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2563389U JPH02117590U (en) | 1989-03-07 | 1989-03-07 | |
| JP1-25633 | 1989-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2008061C true CA2008061C (en) | 1994-12-13 |
Family
ID=12171267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2008061 Expired - Fee Related CA2008061C (en) | 1989-03-07 | 1990-01-18 | Liquid crystal display |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0387034A3 (en) |
| JP (1) | JPH02117590U (en) |
| CA (1) | CA2008061C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05127616A (en) * | 1991-10-31 | 1993-05-25 | Canon Inc | Electrooptic display device and electrooptic element driving device |
| US7091942B2 (en) | 2000-01-31 | 2006-08-15 | Seiko Epson Corporation | Electrooptic device and driving method thereof |
| GB0210568D0 (en) | 2002-05-08 | 2002-06-19 | Screen Technology Ltd | Display |
| US20060038742A1 (en) * | 2002-07-23 | 2006-02-23 | Research In Motion Limited | Method and apparatus of controlling a liquid crystal display viewing area |
| KR100761296B1 (en) * | 2006-03-17 | 2007-09-27 | 엘지전자 주식회사 | Light emitting device and method of driving the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63225295A (en) * | 1987-03-14 | 1988-09-20 | シャープ株式会社 | Liquid crystal display device |
| DE3850520T2 (en) * | 1987-03-31 | 1994-12-01 | Canon Kk | Display device. |
-
1989
- 1989-03-07 JP JP2563389U patent/JPH02117590U/ja active Pending
-
1990
- 1990-01-18 CA CA 2008061 patent/CA2008061C/en not_active Expired - Fee Related
- 1990-03-07 EP EP9090302436A patent/EP0387034A3/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0387034A2 (en) | 1990-09-12 |
| JPH02117590U (en) | 1990-09-20 |
| EP0387034A3 (en) | 1991-04-10 |
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| EEER | Examination request | ||
| MKLA | Lapsed |