CN102360260A - Sensing electrode for projection type capacitance touch screen - Google Patents

Abstract

The invention relates to a sensing electrode for a projection type capacitance touch screen, which comprises a plurality of X electrodes arranged in the X direction and a plurality of Y electrodes arranged in the Y direction, and adjacent X electrode and Y electrode are mutually embedded. The sensing electrode is characterized in that edges of the X electrodes and the Y electrodes are formed by a plurality of contour lines, each contour line comprises at least one segment, and the extended line of each segment is crossed with the Y direction. Any one part of the edges of the X electrodes and the Y electrodes are arranged to be not parallel with the Y direction so that the edges of the X electrodes and the Y electrodes are not mutually overlapped with a straight line formed by sub-pixels with a certain color in the Y direction and multiple colors of sub-pixels are alternatively overlapped, thus color cast of the whole straight line in the Y direction can be avoided being generated, and naked eyes are difficult to find the color cast, and the problem that the color cast influences a user to watch pictures is avoided.

Description

A kind of sensing electrode that is used for projection-type capacitive touch screen

Technical field

The present invention relates to a kind of sensing electrode, relate in particular to a kind of sensing electrode that is used for projection-type capacitive touch screen.

Background technology

In recent years, along with the fast development and the application of infotech, wireless mobile communication and information household appliances, people grow with each passing day to the dependence of electronic product.In order to reach more convenient, volume is more lightly changed and more humane purpose, many electronic products by traditional keyboard or mouse as input media, change to use being arranged on the preceding touch-screen of display screen into as input media.Existing touch-screen is broadly divided into types such as condenser type, resistance-type, photosensitizing type.Wherein, capacitance touch screen has been widely applied to each electronic product, in mobile phone, panel computer.The characteristics of capacitance touch screen are that transmitance is high and touch and exert pressure and needn't exert oneself, and survey when can also realize a plurality of touch point during work, manipulate humanized.

The sensing part of capacitance touch screen is made up of sensing electrode, and sensing electrode comprises a plurality of X electrode and a plurality of Y electrodes that extend along the Y direction that extend along directions X, the interlaced formation induction arrays of X electrode and Y electrode; Electrically do not connect mutually between each X electrode, electrically do not connect mutually between each Y electrode, electrically be not connected between X electrode and the Y electrode.When the user contacted touch screen with finger, the X electrode at contact point place, the electric capacity of Y electrode changed, and through electric circuit inspection, just can judge the generation of touch and the coordinate of contact point.This changes in capacitance; Comprise the capacitance variations between X electrode, Y electrode and the ground; And the capacitance variations between the X electrode, Y electrode, the latter is called the mutual capacitance between X electrode, the Y electrode, through mutual capacitance being detected to judge the generation that touches and the coordinate of contact point; When multiple point touching, can avoid occurring problems such as " terrible points ".Transparent for capacitance touch screen is designed to, above-mentioned X electrode, Y electrode often adopt transparent conductive material to be made.

As shown in Figure 1; Hold the capacitance touch screen that detects principle mutually for adopting; At the stagger regional A of certain distance (about tens microns) ofX electrode 01 andY electrode 02,X electrode 01 edge is able to pass the surface of touch-screen and user's finger is had an effect to theelectric field line 03 atY electrode 02 edge, therefore; This zone A forms themutual appearance district 04 of capacitance touch screen, and the area that holdsdistrict 04 mutually is one of important determinative of capacitance touch screen sensitivity.

As shown in Figure 2, in order to increase the area in mutual appearance district, improve the sensitivity of capacitance touch screen; Some producer is designed to mutual embedding figure withX electrode 01 andY electrode 02; Promptly beadjacent X electrode 01 withY electrode 02 in, the edge of one of them electrode is provided with breach at adjacent, another electrode is provided with and the corresponding outshot of breach at adjacent; Outshot is in the breach, and is gapped between the edge of outshot and the edge of breach.KeepX electrode 01,Y electrode 02 certain distance that staggers at the mutual edge of embedding figure, form the mutual appearance district that prolongs along mutual embedding pattern edge, therefore, can increase the area in mutual appearance district, improved the sensitivity of capacitance touch screen.In general, also the edge with mutual embedding figure is designed to along directions X, Y direction, and it is parallel with electrode direction or vertical, can obtain bigger mutual appearance district area.

Capacitance touch screen generally is set at the display top; The picture of display generally is made up of the pixel of arranging along directions X, Y direction; And; Each pixel generally by press the sub-pixel formation that three primary colors (like RGB) are arranged successively along directions X, that is to say that the sub-pixel of every kind of color is arranged in a straight line along the Y direction.As shown in Figure 3; When capacitance touch screen is arranged on display when top,, make the light that sees through along original route reduce becauseelectrode edge 05 can changeemit beam 06 round (through reflection, refraction, diffraction) of pixel; Therefore, the brightness of the feasible sub-pixel that overlaps reduces.As shown in Figure 4, in the capacitance touch screen of the mutual embedding figure of above-mentioned employing, the embedding figure contains a large amount ofelectrode edges 05 along the Y direction mutually; During the straight line overlaid that constitutes with a kind of color sub-pixel (G sub-pixel) whenkind electrode edge 05, on this straight line overlapping region, the G sub-pixel brightness of this color has reduced; Therefore colour cast has appearred, because naked eyes are more obvious to change in color, therefore; Naked eyes can be observed tangible colour cast straight line, have influenced user's watching picture.

Summary of the invention

The technical matters that the present invention will solve provides a kind of sensing electrode that is used for projection-type capacitive touch screen; This sensing electrode that is used for projection-type capacitive touch screen; Can enlarge mutual appearance district area; And avoid that colour cast appears in the whole piece straight line on the Y direction, avoid colour cast to watch picture to impact the user.The technical scheme that adopts is following:

A kind of sensing electrode that is used for projection-type capacitive touch screen; Comprise a plurality of X electrode and a plurality of Y electrodes of arranging along directions X of arranging along the Y direction; Adjacent X electrode and Y electrode are embedded mutually to be put; It is characterized in that: the edge of X electrode and Y electrode constitutes by many outline lines, and every outline line includes at least one line segment, and the extended line of every line segment all intersects with the Y direction.

X electrode and Y electrode are embedded mutually to put and are meant in adjacent the X electrode and Y electrode; The edge of one of them electrode is provided with breach at adjacent; Another electrode is provided with and the corresponding outshot of breach at adjacent; Outshot is in the breach, and is gapped between the edge of outshot and the edge of breach.

Being embedded mutually of X electrode and Y electrode put, and enlarges the area that holds the district mutually, improves the sensitivity of capacitance touch screen; And the extended line of the arbitrary line segment in the outline line all intersects with the Y direction; Therefore, arbitrary part at the edge of X electrode and Y electrode is all not parallel with the Y direction, and the straight line that can not constitute with the sub-pixel of certain color of Y direction is overlapped; But it is alternately overlapping with the sub-pixel of multiple color; Therefore avoid that colour cast appears in the whole piece straight line on the Y direction, thus naked eyes be difficult to realize, avoided colour cast to influence the problem of watching of user to picture.

As preferred version of the present invention, it is characterized in that: said every outline line includes a line segment.Each bar outline line constitutes by a line segment; The extended line of line segment all intersects with the Y direction; Therefore, each bar outline line is all not parallel with the Y direction, and the straight line that the edge of X electrode and Y electrode can not constitute with the sub-pixel of certain color of Y direction is overlapped; But alternately overlapping with the sub-pixel of multiple color, avoid that colour cast appears in the whole piece straight line on the Y direction.

As the further preferred version of the present invention, it is characterized in that: the extended line of said line segment becomes the angle greater than 20 ° with the Y direction.The extended line of line segment becomes the angle greater than 20 ° with the Y direction; Guarantee that outline line and Y direction have certain angle of inclination; Reduce the equitant area of straight line that the sub-pixel of certain color of outline line (promptly being the edge of X electrode and Y electrode) and Y direction constitutes as far as possible, further reduce the influence of colour cast naked eyes.

As another kind of preferred version of the present invention; It is characterized in that: at least under the length direction of the said outline line situation parallel with the Y direction; Outline line comprises many first line segments and many second line segments, and first line segment becomes the angle ofθ 1 with Y direction hour hands, and second line segment becomes the angle ofθ 2 with Y direction hour hands;θ 1 is greater than 0 °, andθ 2 is less than 0 °.The outline line that is made up of first line segment, second line segment is a serrate, make that the overall trend of the outline line that constitutes electrode edge is parallel with the Y direction, and any part of outline line is not parallel with the Y direction.So more help the design of arranging of X electrode and Y electrode, further enlarge the area that holds the district mutually, under the situation that reduces the colour cast influence, the sensitivity that further improves capacitance touch screen, and integral body is more succinct.

As the further preferred version of the present invention, it is characterized in that: the length direction of said outline line is parallel with the Y direction, or parallel with directions X.Length direction through outline line is set to parallel with the Y direction, or parallel with directions X, can carry out densely arrangedly to X electrode and Y electrode, and fully enlarge and hold district's area mutually, under the situation that reduces the colour cast influence, the sensitivity that further improves capacitance touch screen.

As the further preferred version of the present invention, it is characterized in that: 2=90 ° of said θ 1-θ.Promptly being first line segment is set to vertically each other with second line segment, and like this, making the angle of win line segment and second line segment formation is the right angle, can guarantee under the situation of electrode pattern technology permission, to obtain bigger mutual appearance district area.Further preferredθ 1=30 °, θ 2=-60 °.

The present invention compared with prior art has following advantage: arbitrary part at the edge through X electrode and Y electrode is set to not parallel with the Y direction; The straight line that makes the edge of X electrode and Y electrode can not constitute with the sub-pixel of certain color of Y direction is overlapped; But it is alternately overlapping with the sub-pixel of multiple color; Therefore avoid that colour cast appears in the whole piece straight line on the Y direction, thus naked eyes be difficult to realize, avoided colour cast to influence the problem of watching of user to picture.

Description of drawings

Fig. 1 is the arranging and form the synoptic diagram in mutual appearance district of electrode in the prior art;

Fig. 2 is in the prior art, a kind of electrode that increases mutual appearance district synoptic diagram of arranging;

Fig. 3 is the synoptic diagram that pixel emits beam and changes route and weaken at electrode edge;

Fig. 4 is the overlapping synoptic diagram of electrode edge and sub-pixel;

Fig. 5 is the structural representation of the embodiment of the invention one;

Fig. 6 is the partial enlarged drawing of B part among Fig. 5;

Fig. 7 is the location diagram of electrode edge and sub-pixel among the embodiment one;

Fig. 8 is the structural representation of the embodiment of the invention two;

Fig. 9 is the partial enlarged drawing of C part among Fig. 8;

Figure 10 is the partial enlarged drawing of D part among Fig. 9;

Figure 11 is the partial enlarged drawing of E part among Fig. 9.

Embodiment

Do further explanation below in conjunction with accompanying drawing and preferred implementation of the present invention.

Embodiment one

Like Fig. 5 and shown in Figure 6,X electrode 1 andY electrode 2 be by forming with onedeck nesa coating 3, is provided withjumper wire construction 4 at the intervening portion ofX electrode 1 andY electrode 2, respectively at directions X and Y direction conductingX electrode 1 andY electrode 2 and avoid electrically contacting between it.

X electrode 1 andY electrode 2 all are designed to " rice " font of mutual embedding; The edge ofX electrode 1 andY electrode 2 includesmany outline lines 5; Every outline line comprises aline segment 6, the extended line ofline segment 6 is vertical with the Y direction or become ± and 45 ° angle, sooutline line 5 is all not parallel with the Y direction.As shown in Figure 7; Have no line segment 6 (edge ofX electrode 1 and Y electrode 2) overlapped with the straight line of the sub-pixel formation of certain color of Y direction; Therefore can not cause the whole piece straight line colour cast to occur, thus naked eyes be difficult to realize, solved it and had influence on the problem of watching of user picture; The electrode that inserts each other of " rice " font can increase the area in mutual appearance district in addition, has improved the sensitivity of capacitance touch screen.

Embodiment two

Like Fig. 8, Fig. 9 and shown in Figure 10; X electrode 7 andY electrode 8 are by forming with onedeck nesa coating 9; Intervening portion at X electrode 7 andY electrode 8 is provided withjumper wire construction 10, respectively at directions X and Y direction conducting X electrode 7 andY electrode 8 and avoid electrically contacting between it.

X electrode 7 andY electrode 8 all are designed to " king " font of mutual embedding, and the edge of " king " font X electrode 7 andY electrode 8 is made up of a plurality of outline lines 11.The length direction ofoutline line 11 and Y direction are perpendicular or parallel (around jumper wire construction; Also there are into 45 °); Shown in figure 11; Theoutline line 11 parallel with the Y direction, by becoming first line segment 12 ofθ 1,θ 2 angles, the serrate that second line segment 13 constitutes respectively with the Y direction, wherein θ 1=30 °, θ 2=-60 °; Theoutline line 11 vertical with the Y direction, by becoming the 3rd line segment 14 ofθ 3,θ 4, the serrate that the 4th line segment 15 constitutes respectively with the Y direction, whereinθ 3=20 °,θ 4=-70 °.No matter first line segment 12, second line segment 13, the 3rd line segment 14; Or the 4th line segment 15; All not parallel with the Y direction, so the straight line that the edge of X electrode 7 andY electrode 8 can not constitute with the sub-pixel of certain color of Y direction is overlapped, can not cause the whole piece straight line colour cast to occur; Thereby naked eyes are difficult to realize, have solved it and have had influence on the problem of watching of user to picture.

The electrode that king's font inserts each other can increase the area in mutual appearance district, has improved the sensitivity of capacitance touch screen.

Constitute zigzag first line segment 12, second line segment 13, the 3rd line segment 14 and the 4th line segment 15 and can also further increase the area that holds the district between the electrode mutually, the sensitivity that has further improved capacitance touch screen.

Claims (6)

1. sensing electrode that is used for projection-type capacitive touch screen; Comprise a plurality of X electrode and a plurality of Y electrodes of arranging along directions X of arranging along the Y direction; Adjacent X electrode and Y electrode are embedded mutually to be put; It is characterized in that: the edge of X electrode and Y electrode constitutes by many outline lines, and every outline line includes at least one line segment, and the extended line of every line segment all intersects with the Y direction.

2. sensing electrode as claimed in claim 1 is characterized in that: said every outline line includes a line segment.

3. sensing electrode as claimed in claim 2 is characterized in that: the extended line of said line segment becomes the angle greater than 20 ° with the Y direction.

4. sensing electrode as claimed in claim 1; It is characterized in that: at least under the length direction of the said outline line situation parallel with the Y direction; Outline line comprises many first line segments and many second line segments, and first line segment becomes the angle of θ 1 with Y direction hour hands, and second line segment becomes the angle of θ 2 with Y direction hour hands; θ 1 is greater than 0 °, and θ 2 is less than 0 °.

5. sensing electrode as claimed in claim 4 is characterized in that: the length direction of said outline line is parallel with the Y direction, or parallel with directions X.

6. sensing electrode as claimed in claim 4 is characterized in that: said θ 1-θ=90 °.

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