CN103970373A - Panel for capacitive touch screen and capacitive touch screen comprising panel - Google Patents
Panel for capacitive touch screen and capacitive touch screen comprising panel Download PDFInfo
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- CN103970373A CN103970373A CN201310031185.8A CN201310031185A CN103970373A CN 103970373 A CN103970373 A CN 103970373A CN 201310031185 A CN201310031185 A CN 201310031185A CN 103970373 A CN103970373 A CN 103970373A
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Abstract
The invention discloses a panel for a capacitive touch screen and the capacitive touch screen comprising the panel. Horizontally-arranged electrodes and longitudinally-arranged electrodes are arranged on the panel of the capacitive touch screen; at least two types of electrodes are arranged in the same direction, and the capacitance values of electrodes of different types varyand the same one sensing leading wire is connected with a group of electrodes differed in types. According to the invention, through the capacitive touch screen and the panel thereof, the used amount of the sensing leading wires is reduced remarkably, therefore, when the touch position of the capacitive touch screen is judged, the scanning of the sensing leading wire bythe controller circuit of the capacitive touch screenis relatively simpler, and the power consumption of the capacitive touch screen is reduced effectively.
Description
Technical field
The present invention relates to touch screen technology, the capacitive touch screen that relates in particular to a kind of panel of capacitive touch screen and comprise this panel.
Background technology
Current touch-screen is roughly divided into four kinds, is respectively resistance-type, capacitor induction type, infrared-type and surface acoustic wave touch screen.Capacitive touch screen, due to low cost of manufacture, is easy to realize the features such as multi-point touch, is widely used.
The panel bridging type structural designs that adopt as shown in Figure 1 at present traditional capacitive touch screen more, and the sense leads 2 configuring by matrix form, measure the capacitance change on any two sense leads 2 crossover locations, to judge the position coordinates that touches capacitive touch screen.
Visible, current every row or column indium tin oxide (ITO) electrode is respectively connected with a sense leads 2, cause the number of sense leads 2 more, therefore the operation of the controller circuitry of capacitive touch screen in the time of scanning sense leads 2 is just very complicated, causes the power consumption of capacitive touch screen higher.
Summary of the invention
In view of this, fundamental purpose of the present invention is the capacitive touch screen that a kind of panel of capacitive touch screen is provided and comprises this panel, reduces the number of sense leads, reduces the power consumption of capacitive touch screen.
For achieving the above object, technical scheme of the present invention is achieved in that
A panel for capacitive touch screen, the electrode that the panel of described capacitive touch screen is provided with the electrode of lateral arrangement and longitudinally arranges; Described electrode in same direction is set at least two kinds, the capacitance difference of different types of electrode, and be connected with same sense leads for described different types of one group of electrode.
On electrode in described capacitive touch screen,
On partial electrode, be provided with the hole that area is identical; Or,
Partly or entirely on electrode, be provided with the different hole of area; Or,
The width of partial electrode increases or reduces with respect to the width of other electrode.
When the width of described partial electrode increases with respect to the width of other electrode, increase half or one times.
Be provided with the different hole of area on part or all of electrode time, the area of hole differs half.
Described hole be shaped as circle, ellipse, rectangle or triangle.
The connected mode of described electrode and sense leads is:
The different sense leads respectively each electrode different from capacitance are connected, and each sense leads is merged into and after one, is drawn out to the controller circuitry for judging the position coordinates that touches capacitive touch screen; Or,
The different each electrode of capacitance is connected, and any in sense leads described electrode different from capacitance is connected, and described sense leads is drawn out to described controller circuitry.
When the different each electrode of capacitance is connected, each electrode is connected by connecting portion.
Described electrode comprises column electrode and row electrode, and one of described column electrode and row electrode are formed by connecting by bridging type structure; Or,
Described electrode comprises by bridging type structure along the oblique electrode connecting into that is different from line direction and column direction.
Described electrode is indium-tin oxide electrode.
A kind of capacitive touch screen, comprises above-mentioned panel, and for judging the driving circuit of the touch position coordinates of touching capacitive touch screen; Described driving circuit also comprises the signal sensing circuit for the signal of varying strength being carried out to sensing.
Electrode in the present invention's capacitive touch screen in same direction is set at least two kinds, the capacitance difference of different types of electrode, and connect same sense leads for described different types of electrode; The signal of the varying strength generating because of the different capacitances of variety classes electrode according to sense leads, the position coordinates of capacitive touch screen is touched in judgement.Capacitive touch screen of the present invention and panel thereof can obviously reduce the usage quantity of sense leads, therefore when the position of capacitive touch screen is touched in judgement, the controller circuitry of capacitive touch screen is just relatively simply too much in the time of scanning sense leads, and the power consumption of touch-screen is relevant with the quantity of sense leads under normal circumstances, therefore in the situation that reducing sense leads, just can effectively reduce the power consumption of capacitive touch screen.
Brief description of the drawings
Fig. 1 is the panel structure chart of the capacitive touch screen of prior art;
Fig. 2 is the panel structure chart of the capacitive touch screen of the embodiment of the present invention;
Fig. 3 is the general flow chart that the position of capacitive touch screen is touched in the judgement of the embodiment of the present invention;
Description of reference numerals:
1, row electrode; 2, sense leads; 3, conducting is put up a bridge; 4, column electrode; 5, first row electrode; 6, secondary series electrode; 7, the 3rd row electrode; 8, the 4th row electrode; 9, the first row electrode; 10, the second column electrode; 11, the third line electrode; 12, fourth line electrode; ; 13, conducting is put up a bridge; 14, hole; 15, third and fourth column electrode sense leads; 16, first and second row electrode sensing lead-in wire; 17, third and fourth row electrode sensing lead-in wire; 18, first and second column electrode sense leads; 19, connecting portion.
Embodiment
In actual applications, can be in the situation that not increasing technology difficulty, design different types of electrode (or capacitance electrode of other kind), make the capacitance difference (in practical application, the capacitance of interlacing and all or part of electrode in the electrode of row is identical) of the electrode of adjacent lines and adjacent columns.Like this, can control two different row of above-mentioned capacitance or two row electrodes by a sense leads, two row that therefore can be different for described capacitance or two row electrodes connect same sense leads.Visible, above-mentioned set-up mode makes the number of sense leads at least subtract and be a half than traditional structure, therefore the operation of the controller circuitry of capacitive touch screen in the time of scanning sense leads is just relatively simply too much, and then can effectively reduce the power consumption of capacitive touch screen.
Particularly, can carry out setting as shown in Figure 2, in Fig. 2, can put up a bridge 13 by the conducting of mask (mask) technique formation ITO or metal for the first time, then adopt chemical vapour deposition technique to form insulation course (as SiNx or SiO
2, not shown), form the via hole of conducting on putting up a bridge by mask technique for the second time, be used for conducting colleague's electrode, adopt again afterwards a mask technique to form electrode.
Unlike the prior art, in the time forming electrode, can be set at least two kinds (being two kinds in the present embodiment) by electrode, the capacitance difference of variety classes electrode, as: the shape that hole 14(described hole is set on partial electrode can be various shapes, for example circle, ellipse, rectangle, triangle etc.), be provided with the electrode of hole 14 and there is different areas from the electrode that hole 14 is not set, therefore there is different capacitances.
Foregoing just for example understands that a kind of electrode is set to have different types of method of different capacitances, and wherein, on Different electrodes, the area of set hole 14 is identical (shape can be different).As the variation in a kind of concrete application, the quantity of hole 14 is not limited to one, and can be multiple, and hole can be formed at pattern central authorities, also can be formed at the marginal portion of pattern.Routine as another kind variation, the first ITO pattern with hole patterns by mask technique formation for the first time, then form insulation course and pass through the via hole of mask technique formation for the second time, put up a bridge by the conducting of mask technique formation for the third time more afterwards.
Different types of method that electrode is set to have different capacitances also has a lot, such as: the width of partial electrode is increased to (as increased half or one times etc.), increased the electrode of width and there is different capacitance (width of partial electrode can certainly be reduced) from the electrode that does not increase width; Or, partly or entirely on electrode, the obviously hole 14 of difference (differing half etc. as area) of area is being set, be provided with the electrode of hole 14 and there is different capacitances from the electrode that hole 14 is not set, and the electrode that is provided with the hole 14 of different area also has different capacitances.
After above-mentioned setting, can form situation as shown in Figure 2, that is: first row electrode 5 is different from the capacitance of secondary series electrode 6, the 3rd row electrode 7 is different from the capacitance of the 4th row electrode 8, the first row electrode 9 is different from the capacitance of the second column electrode 10, and the third line electrode 11 is different from the capacitance of fourth line electrode 12.And, can connect same sense leads for variety classes electrode, as: sense leads 15 is connected with the third line electrode and fourth line electrode, sense leads 16 is connected with first row electrode and secondary series electrode, sense leads 17 is connected with the 3rd row electrode and the 4th row electrode, sense leads 18 is connected with the first row electrode and the second column electrode.
Above-mentioned sense leads and the connected mode of electrode can have multiple, are only described taking wherein two kinds as example below.
Connected mode one: the one in two kinds of different from capacitance sense leads electrodes is connected, another kind in two kinds of different from capacitance another sense leads electrodes is connected, again two above-mentioned sense leads are merged into and after one, be drawn out to the controller circuitry for judging the position coordinates that touches capacitive touch screen, such as: a sense leads is connected with first row electrode 5, another sense leads is connected with secondary series electrode 6, then is drawn out to described controller circuitry after two above-mentioned sense leads are merged into one.That is: by different sense leads respectively the each electrode different from capacitance be connected, then be drawn out to the controller circuitry for judging the position coordinates that touches capacitive touch screen after each sense leads is merged into one (or quantity is less than many of kind of connected electrode).
Connected mode two: two kinds of different capacitance electrodes are connected, and any in two kinds of different from capacitance sense leads electrodes is connected, again described sense leads is drawn out to described controller circuitry, such as: sense leads 16 is connected with secondary series electrode 6, then sense leads 16 is drawn out to described controller circuitry.That is: each electrodes different capacitance being connected, (the different each electrode of capacitance can be connected by the connecting portion 19 shown in Fig. 2, connecting portion 19 can form by mask technique), and any in described electrodes different from capacitance sense leads is connected, more described sense leads is drawn out to described controller circuitry.
Based on above-mentioned setting, in the time that staff or other object touch capacitor type touch-screens make electrode pressurized, the electrode with different capacitances can cause the mutual appearance between singal input electrode and signal output electrode different, thereby obtain the signal of varying strength, therefore can determine corresponding electrode according to the signal of the varying strength from same sense leads by driving circuit, and then judge the position coordinates that touches capacitive touch screen.Here, driving circuit can be integrated circuit (IC), is with the difference of conventional driving circuit, and driving circuit of the present invention also comprises the signal sensing circuit for the signal of varying strength being carried out to sensing.The signal of described varying strength can be the different signal of voltage, and now, signal sensing circuit can be analog/digital signal conversion device (A/D converter) or the voltage sample device etc. that can be unlike signal by different voltage transitions.In the time that the signal of varying strength is other forms, signal sensing circuit can be also other forms, as long as can identify the difference of signal.
It should be noted that, from above-mentioned technical description, capacitive touch screen of the present invention and panel thereof are not limited to the mode of walking crosswise shown in Fig. 2, perpendicular row, can be also to have the electrode that the connection of slope is embarked on journey.In addition, can not be also as shown in Figure 2 two kinds for the classification of electrode, but three kinds or more, concrete dividing mode and the connected mode of sense leads and aforesaid corresponding manner have same principle.In addition, the one group of different types of electrode that is connected with same sense leads can adjacently arrange, and also can arrange non-conterminously.In the time of non-conterminous setting, technique is slightly more complex, the impact bringing to overcome the alternative arrangement of electrode.Those skilled in the art can decide the bridge design between each electrode as required.
Describe as seen in conjunction with above, judge while touching the position coordinates of capacitive touch screen based on capacitive touch screen of the present invention and panel thereof, can carry out flow process as shown in Figure 3, this flow process comprises the following steps:
Step 310: the electrode in capacitive touch screen in same direction is set at least two kinds, the capacitance difference of different types of electrode, and connect same sense leads for described different types of electrode;
Wherein, the electrode that the panel of described capacitive touch screen is provided with the electrode of lateral arrangement and longitudinally arranges;
Step 320: the signal of the varying strength generating because of the different capacitances of variety classes electrode according to sense leads, the position coordinates of capacitive touch screen is touched in judgement.
Visible in sum, capacitive touch screen of the present invention and panel thereof can obviously reduce the usage quantity of sense leads, therefore when the position of capacitive touch screen is touched in judgement, the controller circuitry of capacitive touch screen is just relatively simply too much in the time of scanning sense leads, and then can effectively reduce the power consumption of capacitive touch screen.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (10)
1. a panel for capacitive touch screen, the electrode that the panel of described capacitive touch screen is provided with the electrode of lateral arrangement and longitudinally arranges; It is characterized in that, the described electrode in same direction is set at least two kinds, the capacitance difference of different types of electrode, and be connected with same sense leads for described different types of one group of electrode.
2. panel according to claim 1, is characterized in that, on the electrode in described capacitive touch screen,
On partial electrode, be provided with the hole that area is identical; Or,
Partly or entirely on electrode, be provided with the different hole of area; Or,
The width of partial electrode increases or reduces with respect to the width of other electrode.
3. panel according to claim 2, is characterized in that, when the width of described partial electrode increases with respect to the width of other electrode, increases half or one times.
4. panel according to claim 2, is characterized in that, be provided with the different hole of area on part or all of electrode time, the area of hole differs half.
5. panel according to claim 2, is characterized in that, described hole be shaped as circle, ellipse, rectangle or triangle.
6. panel according to claim 1, is characterized in that, the connected mode of described electrode and sense leads is:
The different sense leads respectively each electrode different from capacitance are connected, and each sense leads is merged into and after one, is drawn out to the controller circuitry for judging the position coordinates that touches capacitive touch screen; Or,
The different each electrode of capacitance is connected, and any in sense leads described electrode different from capacitance is connected, and described sense leads is drawn out to described controller circuitry.
7. panel according to claim 6, is characterized in that, when the different each electrode of capacitance is connected, each electrode is connected by connecting portion.
8. according to the panel described in claim 1 to 7 any one, it is characterized in that,
Described electrode comprises column electrode and row electrode, and one of described column electrode and row electrode are formed by connecting by bridging type structure; Or,
Described electrode comprises by bridging type structure along the oblique electrode connecting into that is different from line direction and column direction.
9. panel according to claim 1, is characterized in that, described electrode is indium-tin oxide electrode.
10. a capacitive touch screen, comprises the panel as described in claim 1 to 9 any one, and for judging the driving circuit of the touch position coordinates of touching capacitive touch screen; It is characterized in that, described driving circuit also comprises the signal sensing circuit for the signal of varying strength being carried out to sensing.
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| CN201310031185.8A CN103970373B (en) | 2013-01-25 | 2013-01-25 | The panel of capacitive touch screen and the capacitive touch screen comprising the panel |
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| CN201310031185.8A CN103970373B (en) | 2013-01-25 | 2013-01-25 | The panel of capacitive touch screen and the capacitive touch screen comprising the panel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106502484A (en) * | 2016-11-04 | 2017-03-15 | 友达光电（苏州）有限公司 | Touch control unit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106354354B (en) * | 2016-10-12 | 2020-10-02 | 海信视像科技股份有限公司 | Control method and device of capacitive touch screen and terminal equipment |
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| KR100979394B1 (en) * | 2008-05-26 | 2010-09-01 | (주)코아리버 | Touch pad for sensing the coordinate of touching by measuring an electric capacitane thereon |
| CN101655754B (en) * | 2008-08-21 | 2014-03-26 | 株式会社和冠 | Extended touchscreen pattern |
| CN101882039A (en) * | 2010-03-16 | 2010-11-10 | 敦泰科技有限公司 | Capacitive touch screen with electrode chains arranged in folding way |
| CN203133798U (en) * | 2013-01-25 | 2013-08-14 | 北京京东方光电科技有限公司 | Panel of capacitive touch screen and capacitive touch screen including panel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106502484A (en) * | 2016-11-04 | 2017-03-15 | 友达光电（苏州）有限公司 | Touch control unit |
| CN106502484B (en) * | 2016-11-04 | 2019-05-21 | 友达光电（苏州）有限公司 | Touch control unit |
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