CN103064573A

CN103064573A - Capacitive touch screen

Info

Publication number: CN103064573A
Application number: CN2013100113024A
Authority: CN
Inventors: 龙君; 李�瑞; 王升; 张宏坤
Original assignee: Beijing BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Priority date: 2013-01-11
Filing date: 2013-01-11
Publication date: 2013-04-24
Anticipated expiration: 2033-01-11
Also published as: CN103064573B

Abstract

The invention relates to the technical field of touch screens, in particular to a capacitive touch screen for increasing transmittance of capacitive touch screens. The capacitive touch screen comprises a substrate, a first electrode layer disposed on the substrate, a first insulating layer disposed on the first electrode layer and a second electrode layer disposed on the first insulating layer. Electrode patterns of the first electrode layer and the second electrode layer are the same and in opposite positions. Due to the fact that the electrode patterns of the first electrode layer and the second electrode layer are the same and in opposite positions, light blockage by electrodes is reduced, and transmittance of the capacitive touch screen is increased.

Description

A kind of capacitance touch screen

Technical field

The present invention relates to the touch screen technology field, in particular, relate to a kind of capacitance touch screen.

Background technology

Capacitance touch screen is because of simple to operate, and long service life can be resisted the advantages such as abominable external environment and is widely applied in each electronic product.

At present, a kind of capacitance touch screen commonly used adopts single-surface double-layer tin indium oxide (Indium Tin Oxide is hereinafter to be referred as ITO) structure.As shown in Figure 1, the capacitance touch screen of this structure comprises: with the first electrode block array 10 and the second electrode block array 20 of layer setting and mutually insulated; Wherein, the electrode block in the first electrode block array 10 is arranged in the gap of the second electrode block array 20, and each of same row the second electrode block successively signal connects, and connects by metal bridge 11 signals with each first electrode block of delegation.

But, the transmitance of the touch-screen of said structure is lower, and in the manufacturing process, adopt 3 mask mask designs, wherein be used for making the first electrode block array 10 and the second electrode block array 20 for twice, once be used for making the logical metal bridge 11 of each first electrode block that connects with delegation, manufacturing process is complicated, and yield is low.

Summary of the invention

The object of the present invention is to provide a kind of capacitance touch screen, be used for improving the transmitance of capacitance touch screen.

To achieve these goals, the invention provides following technical scheme:

A kind of capacitance touch screen comprises: substrate, be arranged on the first electrode layer on the described substrate, and be arranged on the first insulation course on described the first electrode layer, and be arranged on the second electrode lay on described the first insulation course; Wherein,

The electrode pattern of described the first electrode layer and described the second electrode lay is identical, and the position is relative.

Preferably, described the first electrode layer is comprised of a plurality of electrode blocks of array-like arrangement.

Preferably, described electrode block is tin indium oxide ITO electrode block.

Preferably, described electrode block is is shaped as rectangle, regular hexagon or rhombus.

Preferably, described the first insulation course is resin bed.

Further, also comprise: be arranged on one group of horizontal scanning line and one group of column scan line on the described substrate, described horizontal scanning line is connected with the first electrode layer signal, and described column scan line is connected with the second electrode lay signal.

Further, also comprise the protective seam that is arranged on the described the second electrode lay.

In capacitance touch screen provided by the invention, the electrode pattern that is arranged on the first electrode layer on the substrate and the second electrode lay is identical, and the position is relative, so arranges, and can reduce each electrode block to the obstruction of light, improves the transmitance of capacitance touch screen.

Description of drawings

Fig. 1 is the electrode pattern of capacitance touch screen in the prior art;

Fig. 2 is the cut-open view of capacitance touch screen in the embodiment of the invention;

Fig. 3 is the first electrode layer and the second electrode lay vertical view among Fig. 2.

Embodiment

In the existing capacitance touch screen, the first electrode block array 10 and the second electrode block array 20 arrange and mutually insulated with layer, electrode block in the first electrode block array 10 is arranged in the gap of the second electrode block array 20, affects seeing through of light, causes the transmitance of capacitance touch screen lower.

In view of this, the invention provides a kind of improved technical scheme, capacitance touch screen adopts the identical electrode layer of two-layer electrode pattern, and these two electrode layer positions are relative, reduced the obstruction of electrode block to light, thereby improves the transmitance of capacitance touch screen.

In order to make those skilled in the art better understand technical scheme of the present invention, below in conjunction with Figure of description the embodiment of the invention is described in detail.

As shown in Figure 2, capacitance touch screen provided by the invention comprises: substrate 30, be arranged on the first electrode layer 40 on the substrate 30, and be arranged on the first insulation course 50 on the first electrode layer 40, and be arranged on the second electrode lay 60 on the first insulation course 50; Wherein,

The first electrode layer 40 is identical with the electrode pattern of the second electrode lay 60, and the position is relative.

In the capacitance touch screen that present embodiment provides, the first electrode layer 40 is identical with the electrode pattern of the second electrode lay 60, as shown in Figure 3, the second electrode lay 60 overlaps with the first projection of electrode layer 40 on substrate 30, so arrange, can reduce each electrode block to the obstruction of light, improve the transmitance of capacitance touch screen.

Continuation is referring to Fig. 2, and preferably, a plurality of electrode blocks that the first electrode layer 40 is arranged by array-like form, and because the second electrode lay 60 is identical with the electrode pattern of the first electrode layer 40, so the second electrode lay 60 also is comprised of a plurality of electrode blocks that array-like is arranged.

Preferably, above-mentioned electrode block is the ITO electrode block.

Preferably, above-mentioned electrode block is is shaped as rectangle, regular hexagon or rhombus.As shown in Figure 3, in the present embodiment, the shape of the electrode block of the first electrode layer 40 and the second electrode lay 60 all is rectangle.

Preferably, above-mentioned the first insulation course 50 is resin bed, with available technology adopting point-like support pad (Spacer), point-like support pad skewness appears easily, cause the problems such as the inaccurate and light efficiency in touch point is low to compare, adopt resin bed to replace the support pad, improved the precision of capacitance touch screen identification touch point, and improved the transmitance of capacitance touch screen; In addition, adopt the capacitance touch screen of resin bed also to have slimming, integrated advantage.

Further, above-mentioned capacitance touch screen also comprises: be arranged on one group of horizontal scanning line 80 and one group of column scan line 90 on the substrate 30, horizontal scanning line 80 is connected with the first electrode layer 40 signals, and column scan line 90 is connected with the second electrode lay 60 signals.Particularly, each bar horizontal scanning line 80 is connected with delegation the first electrode block signal, and each bar column scan line 90 is connected with row the second electrode block signal.

Further, above-mentioned capacitance touch screen also comprises the protective seam 70 that is arranged on the second electrode lay 60; For the protection of the second electrode lay 60, and as the touch face of capacitance touch screen.

Above-mentioned capacitance touch screen forms as follows:

At first make one group of horizontal scanning line 80 of row and one group of column scan line 90 at substrate 30, specifically be well known to those skilled in the art, just be not described in detail here; Then adopt the mode of deposition plating at substrate 30 deposition one deck ITO layers, through techniques such as Mask, exposure, development, etching, cleanings, form at last the first electrode layer 40 that M * N the first electrode block consists of.

Next apply one deck resin bed at substrate 30 and the first electrode layer 40, form the first insulation course 50, be used for isolation the first electrode layer 40 and the second electrode lay 60, and restore to the original state after making the touch point compressive deformation, compare with the point-like support pad of existing capacitance touch screen, the permeability of resin bed is good, occurs nor the skewness situation can occur, thereby has improved the precision of capacitance touch screen identification touch point.

Next deposition plating forms one deck ITO layer on the first insulation course 50, through techniques such as Mask, exposure, development, etching, cleanings, form at last the second electrode lay 60 that M * N the second electrode block consists of, the shape of the second electrode block is identical with the shape of the first electrode block, and the position is relative, i.e. the second electrode block and the first electrode block projection on substrate 30 overlaps.

Cover layer protective layer 70 at the second electrode lay 60 at last.

The capacitance touch screen that above-described embodiment provides is identified the touch point by scan mode, particularly, add the pulse sweep signal, other horizontal scanning line ground connection for first a horizontal scanning line, whether the signal that detects simultaneously on the column scan line exists capacitance variations, successively horizontal scanning line is added the pulse sweep signal; Add the pulse sweep signal then for a column scan line, other column scan line ground connection, whether the signal that detects simultaneously on the horizontal scanning line exists capacitance variations, successively rows of scannings, after all horizontal scanning lines and column scan line sweep were finished, the maximum place of capacitance variations was exactly the coordinate position of touch point.

In sum, in the capacitance touch screen provided by the invention, the electrode pattern of the first electrode layer and the second electrode lay is identical, and the position is relative, reduces electrode block to the obstruction of light, thereby has improved the transmitance of capacitance touch screen.This external application resin bed has replaced point-like support pad, has further improved the transmitance of capacitance touch screen, and has improved the precision of capacitance touch screen identification touch point.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. a capacitance touch screen is characterized in that, comprising: substrate, be arranged on the first electrode layer on the described substrate, and be arranged on the first insulation course on described the first electrode layer, and be arranged on the second electrode lay on described the first insulation course; Wherein,

2. capacitance touch screen as claimed in claim 1 is characterized in that, a plurality of electrode blocks that described the first electrode layer is arranged by array-like form.

3. capacitance touch screen as claimed in claim 2 is characterized in that, described electrode block is tin indium oxide ITO electrode block.

4. capacitance touch screen as claimed in claim 3 is characterized in that, described electrode block is is shaped as rectangle, regular hexagon or rhombus.

5. capacitance touch screen as claimed in claim 1 is characterized in that, described the first insulation course is resin bed.

6. such as the arbitrary described capacitance touch screen of claim 1-5, it is characterized in that, also comprise: be arranged on one group of horizontal scanning line and one group of column scan line on the described substrate, described horizontal scanning line is connected with the first electrode layer signal, and described column scan line is connected with the second electrode lay signal.

7. capacitance touch screen as claimed in claim 6 is characterized in that, also comprises the protective seam that is arranged on the described the second electrode lay.