CN106468983B - A kind of method of ground line position in touch panel and determining touch panel - Google Patents
A kind of method of ground line position in touch panel and determining touch panel Download PDFInfo
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- CN106468983B CN106468983B CN201610800150.XA CN201610800150A CN106468983B CN 106468983 B CN106468983 B CN 106468983B CN 201610800150 A CN201610800150 A CN 201610800150A CN 106468983 B CN106468983 B CN 106468983B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
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- General Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
A kind of the present invention relates in touch panel and determining touch panel the method for line position, the touch panel includes a substrate, driving layer and inductive layer are successively arranged in the side of the substrate, the driving layer includes the first ground line, second ground line and several driving electrodes, the inductive layer includes several induction electrodes, it include first capacitor area between the inductive layer and the driving floor, intermediate capacitance area and the second capacitive region, wherein the capacitance error between the capacitance error between the first capacitor area and the intermediate capacitance area and second capacitive region and the intermediate capacitance area is respectively less than 2%.Touch panel of the invention and determine that the method for ground line position in touch panel can be by reducing the data deviation of sensors edges point and intermediate position to the accurate setting of ground wire, to improve the total quality of product.
Description
Technical field
The present invention relates to touch panel technical field, in particular to ground wire position in a kind of touch panel and determining touch panel
The method set.
Background technique
The electronic product with touch panel common at present includes laptop computer, personal digital assistant (personal
Digital assistants, PDA), tablet computer (tablet personal computer), digital camera and mobile phone
Deng.Electronic product with touch panel in actual use, since finger, stylus (stylus) or point can be passed through
Pen etc. execution input function and attracted attention and popularized gradually.
Touch panel is usually to plate indium oxide layer tin thin film (ITO Layer) and protective film on PET film surface
(Hard CoatLayer).For existing touch panel, usually required when being designed by being grounded corresponding layer
The cabling in the channel ITO all mask, to avoid because touch panel caused by relevant electromagnetic interference total quality
Decline.However based on current production technology, for the setting that is grounded line pattern, a specific standard, operation do not have not yet
There is precision, this will lead to the data of sensors edges point and biggish deviation occurs for the data at intermediate position, seriously affect
The qualification rate of product.
Summary of the invention
Based on this, the object of the present invention is to provide a kind of touch panel and determine touch panel in line position method,
By reducing the data deviation of sensors edges point and intermediate position to the accurate setting of ground wire, to improve the entirety of product
Quality.
In order to solve the above technical problems, the present invention provides a kind of touch panel, including a substrate, in the side of the substrate
It is successively arranged driving layer and inductive layer, the driving layer includes the first ground line, the second ground line and several driving electrodes,
The inductive layer includes several induction electrodes；
The single induction electrode region opposite with the close first ground line single driving electrodes of side
For first node capacitive region, first ground line and between the single driving electrodes of first ground line side
The first coupled capacitor area is formed, forms the first sub- coupled capacitor area between first ground line and the single induction electrode,
The total capacitance value of the first node capacitive region, first coupled capacitor area and the first sub- coupled capacitor area is first
Capacitance；
The single induction electrode region opposite with the close second ground line single driving electrodes of side
For second node capacitive region, second ground line and between the single driving electrodes of second ground line side
Form the second coupled capacitor area, the total capacitance value in the second node capacitive region and second coupled capacitor area is the second capacitor
Value；
The middle position of the single induction electrode region opposite with the single driving electrodes is intermediate node capacitor
Area, the capacitance of the intermediate node capacitive region are middle capacitance value；
Capacitance error and second capacitance between the first capacitor value and the middle capacitance value with it is described
Capacitance error between middle capacitance value is respectively less than 2%.
The touch panel, wherein first ground line and the silver wire phase interconnection for being set to first ground line periphery
It connects.
The touch panel, wherein it is described first ground line it is parallel with second ground line, it is described first be grounded with
And the length of second ground line is all larger than the length of the driving electrodes.
The touch panel, wherein the material that first ground line is grounded with described second includes metal or transparent
Conductive material.
The touch panel, wherein the touch panel is the touch screen of the support multiple spot of mutual capacitance type.
The touch panel, wherein the substrate is plastic cement substrate, and the one side of the substrate is the touching by cure process
Surface is touched, the another side opposite with the touch-surface is load-bearing surface.
A kind of the present invention also provides in determining touch panel the method for line position, provides a touch panel first, including
One substrate is successively arranged driving layer and inductive layer in the side of the substrate, and the driving layer includes the first ground line, second
Ground line and several driving electrodes, the inductive layer include several induction electrodes；
The single induction electrode region opposite with the close first ground line single driving electrodes of side
For first node capacitive region, first ground line and between the single driving electrodes of first ground line side
The first coupled capacitor area is formed, forms the first sub- coupled capacitor area between first ground line and the single induction electrode,
The first node capacitive region, first coupled capacitor area and the first sub- coupled capacitor district's groups synthesize first capacitor
Area；
The single induction electrode region opposite with the close second ground line single driving electrodes of side
For second node capacitive region, second ground line and between the single driving electrodes of second ground line side
The second coupled capacitor area is formed, the second node capacitive region synthesizes the second capacitive region with the second coupled capacitor district's groups；
The middle position of the single induction electrode region opposite with the single driving electrodes is intermediate node capacitor
Area；
Capacitance error between the capacitance in the first capacitor area and the capacitance of the intermediate node capacitive region and
Capacitance error between the capacitance of second capacitive region and the capacitance of the intermediate node capacitive region is respectively less than 2%, institute
The method for stating ground line position in determining touch panel specifically includes:
It calculates the integral capacitor value of the intermediate node capacitor and is denoted as middle capacitance value；
Calculate the integral capacitor value in the first capacitor area and be denoted as first capacitor value, by the first capacitor value with it is described
Middle capacitance value carries out capacitance comparison and adjusts described first if the first capacitor value and the middle capacitance value are unequal
The relative position of ground line and then the size for controlling the first capacitor value, keep it equal with the middle capacitance value；
Calculate the integral capacitor value of second capacitive region and be denoted as the second capacitance, by second capacitance with it is described
Middle capacitance value carries out capacitance comparison and adjusts described second if second capacitance and the middle capacitance value are unequal
The relative position of ground line and then the size for controlling second capacitance, keep it equal with the middle capacitance value.
The method of ground line position in the determining touch panel, wherein in the integral capacitor for calculating the first capacitor area
It is worth and is denoted as first capacitor value, the first capacitor value is subjected to capacitance with the middle capacitance value and is compared, if first electricity
Capacitance and the middle capacitance value are unequal, then adjust the relative position of first ground line and then control the first capacitor
The size of value, in the step for keeping it equal with the middle capacitance value, specific steps include:
Calculate separately the first node capacitive region, first coupled capacitor area and the first sub- coupled capacitor area
Capacitance, be denoted as first node capacitance, the first coupling capacitance and the first sub- coupling capacitance respectively；
The first node capacitance, first coupling capacitance and the first sub- coupling capacitance are added
To the first capacitor value；
The first capacitor value and the middle capacitance value are subjected to capacitance comparison, if the first capacitor value and it is described in
Between capacitance it is unequal, then adjust the relative position of first ground line to change the size of the first capacitor value, make it
It is equal with the middle capacitance value；
First ground line is calculated by the variable quantity size of the first capacitor value to be grounded with close to described first
The distance between driving electrodes.
The method of ground line position in the determining touch panel, wherein in the integral capacitor for calculating second capacitive region
It is worth and is denoted as the second capacitance, second capacitance is subjected to capacitance with the middle capacitance value and is compared, if second electricity
Capacitance and the middle capacitance value are unequal, then adjust the relative position of second ground line and then control second capacitor
The size of value, in the step for keeping it equal with the middle capacitance value, specific steps include:
The capacitance for calculating separately the second node capacitive region and second coupled capacitor area, is denoted as second respectively
Node capacitor value and the second coupling capacitance；
It is added the second node capacitance and second coupling capacitance to obtain second capacitance；
Second capacitance and the middle capacitance value are subjected to capacitance comparison, if second capacitance and it is described in
Between capacitance it is unequal, then adjust the relative position of second ground line to change the size of second capacitance, make it
It is equal with the middle capacitance value；
Second ground line is calculated by the variable quantity size of second capacitance to be grounded with close to described second
The distance between described driving electrodes of side.
The method of ground line position in the determining touch panel, wherein first ground line and second ground line
Material include metal or transparent conductive material.
Touch panel of the invention and the method for determining ground line position in touch panel can pass through precisely setting to ground wire
It sets to reduce the data deviation of sensors edges point and intermediate position, to improve the total quality of product.
Detailed description of the invention
Fig. 1 is the integrally-built side view for the touch panel that first embodiment of the invention proposes；
Fig. 2 is the structure top view that layer is driven in touch panel shown in FIG. 1；
Fig. 3 is the schematic enlarged-scale view of part " I " in Fig. 2；
Fig. 4 is the structure top view of inductive layer in touch panel shown in FIG. 1；
Fig. 5 is the integrally-built top view for the touch panel that first embodiment of the invention proposes；
Fig. 6 is the schematic enlarged-scale view of part " V " in Fig. 5；
Fig. 7 is the schematic enlarged-scale view of part " M " in Fig. 5；
Fig. 8 is the schematic enlarged-scale view of part " N " in Fig. 5；
Fig. 9 is the method flow diagram for the determination touch panel interior ground line position that second embodiment of the invention proposes；
Figure 10 is the method stream of distance between the third embodiment of the invention ground line of determination first proposed and driving electrodes
Cheng Tu；
Figure 11 is the method stream of distance between the fourth embodiment of the invention ground line of determination second proposed and driving electrodes
Cheng Tu.
Primary symbols explanation:
| Substrate | 10 | First ground line | 114 |
| Drive layer | 11 | Second ground line | 115 |
| Inductive layer | 12 | First induction electrode | 121 |
| First capacitor area | 20 | Second induction electrode | 122 |
| Intermediate node capacitive region | 21 | First node capacitive region | 201 |
| Second capacitive region | 22 | First coupled capacitor area | 202 |
| First driving electrodes | 111 | First sub- coupled capacitor area | 203 |
| Second driving electrodes | 112 | Second node capacitive region | 221 |
| Intermediate drive electrodes | 113 | Second coupled capacitor area | 222 |
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give preferred embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.
It should be noted that it can directly on the other element when element is referred to as " being fixedly arranged on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Fig. 1 to Fig. 8 is please referred to, Fig. 1 is the overall structure side view for the touch panel that first embodiment of the invention proposes, figure
2 structure top view to drive layer in touch panel shown in FIG. 1, Fig. 3 are the schematic enlarged-scale view of part " I " in Fig. 2, and Fig. 4 is
The structure top view of inductive layer in touch panel shown in FIG. 1, Fig. 5 are the whole of the touch panel that first embodiment of the invention proposes
Body structure top view, Fig. 6 are the schematic enlarged-scale view of part " V " in Fig. 5, and Fig. 7 is the schematic enlarged-scale view of part " M " in Fig. 5, Fig. 8
For the schematic enlarged-scale view of part " N " in Fig. 5, provide a kind of touch panel, including a substrate 10, the side of the substrate 10 according to
Secondary to be equipped with driving layer 11 and inductive layer 12, the driving layer 11 includes that the first ground line 114 and second is grounded 115,
Side close to first ground line 114 is equipped with the first driving electrodes 111, is equipped with close to the side of second ground line
Second driving electrodes 112 are equipped with intermediate drive electrodes 113 in the middle position of the driving layer 11, and the inductive layer 12 includes
First induction electrode 121 and the second induction electrode 122, it should be noted that the inductive layer 12 is in addition to including described
It further include other several and first induction electrode except first induction electrode 121 and second induction electrode 122
121 and the identical induction electrode of 122 specification of the second induction electrode, it is intended merely to conveniently having chosen wherein for description herein
Two induction electrodes (first induction electrode 121 and second induction electrode 122 are illustrated.
First induction electrode 121 region opposite with first driving electrodes 111 is first node capacitive region
201, it is formed between first ground line 114 and first driving electrodes 111 for being grounded 114 sides close to described first
First coupled capacitor area 202 forms the first son and couples electricity between first ground line 114 and first induction electrode 121
Hold area 203, wherein the first node capacitive region 201, first coupled capacitor area 202 and the first sub- coupled capacitor
Area 203 is combined into first capacitor area 20, and the total capacitance value in the first capacitor area 20 is first capacitor value.
In addition, second induction electrode 122 and second driving electrodes close to second ground line, 115 sides
112 opposite regions are second node capacitive region 221, and second ground line 115 is grounded 115 sides with close to described second
Second driving electrodes 112 between form the second coupled capacitor area 222, wherein the second node capacitive region 221 and institute
It states the second coupled capacitor area 222 and is combined into the second capacitive region 22, the total capacitance value of second capacitive region 22 is the second capacitance.
The middle position of second induction electrode 122 region opposite with the intermediate drive electrodes 113 is middle node
Point capacitive region 21, the capacitance of the intermediate node capacitive region 21 are middle capacitance value.Wherein, in the present embodiment, described
Between capacitance error and second capacitance and the middle capacitance value between one capacitance and the middle capacitance value
Capacitance error guarantee in the range of respectively less than 2%.For the touch panel, due to being located at the touch panel two sides
The first capacitor area 20, second capacitive region 22 be located at the touch panel middle position the intermediate node electricity
The capacitance for holding area 21 is almost equal, therefore the data-signal for entire touch panel sensor, at marginal position
Data deviation between the data-signal at centrally located place is smaller, this undoubtedly improves the yield of product, improves touching
Control the total quality of panel.
The touch panel, wherein first ground line 114 and the silver wire for being set to first ground line, 114 peripheries
Mutually overlap joint.In addition, second ground line 115 does not overlap mutually with the silver wire for being set to second ground line, 115 peripheries.?
That is, the first capacitor area 20 is silver wire overlap edge, second capacitive region 22 is non-silver wire overlap edge.
First ground line 114 and second ground line are 115 parallel, and described first is grounded 114 and described the
The length of two ground lines 115 is all larger than first driving electrodes 111, second driving electrodes 112 and the intermediate drive
The length of moving electrode 113.Wherein, the purpose that first ground line 114 and second ground line 115 is arranged is mainly to be
Interference of the electromagnetic interference to the relevant data signals of touch panel is prevented, to promote the total quality of touch panel.
The material of first ground line 114 and second ground line 115 includes metal or transparent conductive material, at this
In embodiment, the material of first ground line 114 and second ground line 115 is metal.In addition, the touch surface
Plate is the touch screen of the support multiple spot of mutual capacitance type, and in actual use, operator can appointing in the touch screen
Meaning carries out touch control operation at position.
The substrate 10 is plastic cement substrate, and the one side of the substrate 10 is the touch-surface by cure process, and described
The opposite another side of touch-surface is load-bearing surface.
Referring to Fig. 9, Fig. 9 is the method flow for the determination touch panel interior ground line position that second embodiment of the invention proposes
Figure, the method specific steps of the determining touch panel interior ground line position are as follows:
S101 calculates the integral capacitor value of the intermediate node capacitive region and is denoted as middle capacitance value；
S102 calculates the integral capacitor value in the first capacitor area and is denoted as first capacitor value, by the first capacitor value
Capacitance is carried out with the middle capacitance value to compare, if the first capacitor value and the middle capacitance value are unequal, adjusts institute
It states the relative position of the first ground line and then controls the size of the first capacitor value, keep it equal with the middle capacitance value；
S103 calculates the integral capacitor value of second capacitive region and is denoted as the second capacitance, by second capacitance
Capacitance is carried out with the middle capacitance value to compare, if second capacitance and the middle capacitance value are unequal, adjusts institute
It states the relative position of the second ground line and then controls the size of second capacitance, keep it equal with the middle capacitance value.
Below with reference to a specific example in the determination touch panel line position method carry out it is more detailed
Ground narration.The integral capacitor value of the intermediate node capacitive region 21 is calculated according to the calculation formula of parallel plate capacitor first, and is remembered
For middle capacitance value C0, wherein calculate the correlation formula of capacitor are as follows:
C=ε s/4 π kd
Wherein, ε is constant relevant to material, and S is the area of capacitor plate, and k is electrostatic force constant, and d is distance.
In the integral capacitor value C that the intermediate node capacitive region 21 has been calculated0Later, continue to count using above-mentioned formula
It calculates the integral capacitor value in the first capacitor area 20 and is denoted as first capacitor value C1, by first capacitor value C1With the intermediate electricity
Capacitance C0It compares, if first capacitor value C1With the middle capacitance value C0Differ larger, and mutual capacitance
When error has exceeded 2%, the position by adjusting first ground line 114 is then needed to change the first capacitor value at this time
C1Size, as the first capacitor value C1Size and the middle capacitance value C0Between capacitance relative error less than 2%
When, it is believed that the standard for having reached setting can guarantee at this time positioned at the first capacitor area of the touch panel side
20 capacitance and the capacitance in the intermediate capacitance area 21 for being located at the touch panel middle position are almost equal, so as to
With the number for effectively avoiding the data-signal being located at marginal position on touch panel with being located at the touch panel middle position
It is believed that number between deviation, improve the overall effect of touch panel.
Similarly, it after completing the capacitive calibration between the first capacitor area 20 and the intermediate capacitance area 21, needs
Correlation-corrected is also carried out to the capacitance of second capacitive region 22 according to the capacitance in the intermediate capacitance area 21.It is similar
Ground continues to calculate the integral capacitor value of second capacitive region 22 and is denoted as the second capacitance using the calculation formula of above-mentioned capacitor
C2, by second capacitance C2With the middle capacitance value C0It compares, if second capacitance C2With the middle capacitance value
C0It differs larger, and when the error of mutual capacitance has exceeded 2%, is then needed at this time by adjusting second ground connection
The position of line 115 changes the second capacitance C2Size, as the second capacitance C2Size and the intermediate capacitance
Value C0Between capacitance relative error less than 2% when, it is believed that reached setting standard, can guarantee to be located at institute at this time
State the capacitance of second capacitive region 22 of touch panel side and the centre for being located at the touch panel middle position
The capacitance of capacitive region 21 is almost equal, so as to effectively avoid on touch panel be located at marginal position at data-signal with
Deviation between the data-signal of the touch panel middle position, improves the overall effect of touch panel.
Referring to Fig. 10, Figure 10 be third embodiment of the invention propose determination first ground line 114 with driving electrodes it
Between distance method flow diagram, specific steps are as follows:
S201 calculates separately the first node capacitive region, first coupled capacitor area and the first son coupling
The capacitance of capacitive region is denoted as first node capacitance, the first coupling capacitance and the first sub- coupling capacitance respectively；
S202, by the first node capacitance, first coupling capacitance and the first sub- coupling capacitance
Addition obtains the first capacitor value；
The first capacitor value and the middle capacitance value are carried out capacitance comparison by S203, if the first capacitor value with
The middle capacitance value is unequal, then adjusts the relative position of first ground line to change the big of the first capacitor value
It is small, keep it equal with the middle capacitance value；
S204 calculates first ground line by the variable quantity size of the first capacitor value and connects with close to described first
The distance between described driving electrodes of ground wire.
Below with reference to a specific example to confirmation first ground line 114 and driving electrodes between distance method into
Row describes in more detail, it is first determined the first node capacitive region 201, first coupled capacitor area 202 and described
Then the specific range in the first sub- coupled capacitor area 203 calculates relevant capacitance according to the formula of above-mentioned calculating capacitance, should
Calculate the formula of capacitance are as follows:
C=ε s/4 π kd
Wherein, ε is constant relevant to material, and S is the area of capacitor plate, and k is electrostatic force constant, and d is distance.Herein
It should be noted that when calculating the capacitor in first coupled capacitor area 202 and the first sub- coupled capacitor area 203,
It is first ground line 114 as first coupled capacitor area 202 and is grounded described in 114 sides close to described first
First driving electrodes 111 are formed by, therefore when calculating the coupling capacitance, and S herein is first ground line
Opposite area between 114 and first driving electrodes 111, rather than the area between capacitor plate.Similarly, due to described
One sub- coupled capacitor area 203 is that first ground line 114 is formed by with first induction electrode 121, therefore is being calculated
When the coupling capacitance, S herein is opposite between first ground line 114 and first induction electrode 121
Area, rather than the area between capacitor plate.
The first node capacitive region 201, first coupled capacitor area 202 and institute are calculated separately according to above-mentioned formula
The capacitance for stating the first sub- coupled capacitor area 203, is denoted as first node capacitance C respectively11, the first coupling capacitance C12And
First sub- coupling capacitance C13, then by the first node capacitance C11, the first coupling capacitance C12And first son coupling
Capacitance C13Addition obtains the first capacitor value C1.Then by the first capacitor value C1With the middle capacitance value C0It carries out
Comparison.In this respect it is to be noted that according to the calculation formula of impedance:
R=ρ l/mr
Wherein, ρ is constant relevant to material, and l is length, and m is width, and r is the sheet resistance of ITO access.According to above-mentioned meter
Calculate impedance formula it can be concluded that, for be located at it is described first ground line 114 sides the first node capacitive region 201 and
Speech, impedance are substantially zeroed for the intermediate capacitance area 21 at centrally located place.And impedance is in capacitance
Inverse relation, therefore the capacitance of the first node capacitive region 201 is greater than the capacitance in the intermediate capacitance area 21.So
The first node capacitance C at this time11, the first coupling capacitance C12And the first sub- coupling capacitance C13Addition obtains described
First capacitor value C1Value also greater than the middle capacitance value.Therefore need to adjust the opposite of first ground line 114 at this time
Position reduces the first capacitor value C in the first capacitor area 201, make itself and the middle capacitance value C0It is equal.In practical adjustments
In the process, due to the first node capacitance C11It is greater than the middle capacitance value C0, in order to reduce the first node electricity
Capacitance C11Size, according to the calculation formula of above-mentioned capacitance size, should be moved to the left at this time it is described first ground line 114,
I.e. by increasing between first ground line 114 and first induction electrode 121 and first driving electrodes 111
Distance, to reduce relevant coupled capacitor, as the first coupling capacitance C12And the first sub- coupling capacitance C13All reduce
When, the capacitor at the first node capacitive region 201 will be to first coupled capacitor area 202 and the first son coupling
Capacitive region 203 compensates, so that whole capacitance namely the first capacitor value C1It is whole to reduce, finally make
The first capacitor value C1Value and the middle capacitance value C0Error less than 2%.
When by adjust it is described first ground line 114 position control described in first capacitor value C1Value make its with it is described in
Between capacitance C0Deviation within the limits prescribed and then calculate the first capacitor value C1The capacitance Δ C of front and back variation1,
Then pass through the capacitance Δ C of the variation1, in conjunction with and substitute into the dependent constants such as above-mentioned ε, S and k, due to only distance d mono-
A unknown number can be pushed away at this time according to the distance of the formula of above-mentioned calculating capacitor to 114 variation of the first ground line is counter,
First ground line the distance between 114 and first driving electrodes 111 are finally obtained, namely finally determine described first
The position of ground line 114.In the present embodiment, using above-mentioned determination first ground line 114 and first driving electrodes
The method of distance between 111 substitutes into dependent constant and finally obtains first ground line 114 and first driving electrodes later
The distance between 111 be 0.06mm.
Please refer to Figure 11, Figure 11 be the fourth embodiment of the invention ground line of determination second 115 and driving electrodes that propose it
Between distance method flow diagram, specific steps are as follows:
S301 calculates separately the capacitance of the second node capacitive region and second coupled capacitor area, remembers respectively
For second node capacitance and the second coupling capacitance；
S302 is added the second node capacitance and second coupling capacitance to obtain second capacitor
Value；
Second capacitance and the middle capacitance value are carried out capacitance comparison by S303, if second capacitance with
The middle capacitance value is unequal, then adjusts the relative position of second ground line to change the big of second capacitance
It is small, keep it equal with the middle capacitance value；
S304 calculates second ground line by the variable quantity size of second capacitance and connects with close to described second
The distance between described driving motor of ground wire side.
Below with reference to a specific example to confirmation second ground line 115 and driving electrodes between distance method into
Row describes in more detail, it is first determined the second node capacitive region 221 and second coupled capacitor area 222 it is specific
Then range calculates relevant capacitance, the formula of the calculating capacitance according to the formula of above-mentioned calculating capacitance are as follows:
C=ε s/4 π kd
Wherein, ε is constant relevant to material, and S is the area of capacitor plate, and k is electrostatic force constant, and d is distance.Herein
It should be noted that when calculating the capacitance in second coupled capacitor area 222, due to second coupled capacitor area 222
It is formed by for second ground line 115 and second driving electrodes 112 close to second ground line, 115 sides,
Therefore when calculating the coupling capacitance, S herein is second ground line 115 and second driving electrodes 112
Between opposite area, rather than the area between capacitor plate.
The second node capacitive region 221 and second coupled capacitor area 222 are calculated separately according to above-mentioned formula
Capacitance is denoted as second node capacitance C respectively21And the second coupling capacitance C22, then by the second node capacitance
C21And the second coupling capacitance C22Addition obtains the second capacitance C2.Then by the first capacitor value C2With institute
State middle capacitance value C0It compares.In this respect it is to be noted that according to the calculation formula of impedance:
R=ρ l/mr
Wherein, ρ is constant relevant to material, and l is length, and m is width, and r is the sheet resistance of ITO access.According to above-mentioned meter
Calculate impedance formula it can be concluded that, for be located at it is described second ground line 115 sides the second node capacitive region 221 and
Speech, since it is located at the non-overlapping side of silver wire, one times of the substantially described intermediate capacitance area 21 of impedance, and impedance is in capacitance
Inverse relation, therefore the capacitance of the second node capacitive region 221 is less than the capacitance in the intermediate capacitance area 21.So
The second node capacitance C at this time21And the second coupling capacitance C22Addition obtains the second capacitance C2Value it is also small
In the middle capacitance value C0.Therefore need to adjust the relative position of second ground line 115 at this time to increase described second
The first capacitor value C of capacitive region 222, make itself and the middle capacitance value C0It is equal.During practical adjustments, due to described
Two node capacitor value C21It is less than the middle capacitance value C0, in order to increase the second node capacitance C21Size, according to
The calculation formula of above-mentioned capacitance size should be moved to the left second ground line 115 at this time, by reducing second ground connection
The distance between line 115 and second driving electrodes 112, to increase relevant coupled capacitor, when second coupled capacitor
Value C22When increase, capacitor at second coupled capacitor area 222 will be to being mended at the second node capacitive region 221
It repays, so that whole capacitance namely the second capacitance C2It is whole to increase, finally make the second capacitance C2
Value and the middle capacitance value C0Error less than 2%.
When by adjust it is described second ground line 115 position control described in the second capacitance C2Value and the intermediate electricity
Capacitance C0Deviation within the limits prescribed and then calculate the second capacitance C2The capacitance Δ C2 of front and back variation, then
By the capacitance Δ C2 of the variation, in conjunction with and substitute into the dependent constants such as above-mentioned ε, S and k, not due to only distance d mono-
Know number, can be pushed away at this time according to the distance of the formula of above-mentioned calculating capacitor to 115 variation of the second ground line is counter, finally
Second ground line the distance between 115 and second driving electrodes 112 are obtained, namely determine second ground line
115 specific location.In the present embodiment, using above-mentioned determination second ground line 115 and second driving electrodes 112
Between distance method, substitute into dependent constant after finally obtain it is described second ground line 115 with second driving electrodes 112
The distance between be 0.18mm.
After the specific location of first ground line 114 and second ground line 115 has been determined, namely complete
To the accurate arrangement of touch panel ground line.Due to arranging first ground line 114 and second ground line 115 all
It is that this standard that the capacitance based on entire touch panel position is differed less than 2% is performed, therefore is worked as and arranged
After first ground line 114 and second ground line 115, it can avoid the touch panel edge position well
The deviation of signal of place and middle position is set, to improve the total quality of touch panel, improves the yield of product.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of touch panel, which is characterized in that including a substrate, be successively arranged driving layer and sense in the side of the substrate
Layer is answered, the driving layer includes that the first ground line, the second ground line and several driving electrodes, the inductive layer include several senses
Answer electrode；
The single induction electrode with close to the opposite region of the first ground line single driving electrodes of side be the
One node capacitor area is formed between first ground line and the single driving electrodes for being grounded side close to described first
First coupled capacitor area forms the first sub- coupled capacitor area between first ground line and the single induction electrode, described
The total capacitance value of first node capacitive region, first coupled capacitor area and the first sub- coupled capacitor area is first capacitor
Value；
The single induction electrode with close to the opposite region of the second ground line single driving electrodes of side be the
Two node capacitor areas are formed between second ground line and the single driving electrodes for being grounded side close to described second
The total capacitance value in the second coupled capacitor area, the second node capacitive region and second coupled capacitor area is the second capacitance；
The middle position of the single induction electrode region opposite with the single driving electrodes is intermediate node capacitive region, institute
The capacitance for stating intermediate node capacitive region is middle capacitance value；
Capacitance error and second capacitance and the centre between the first capacitor value and the middle capacitance value
Capacitance error between capacitance is respectively less than 2%, wherein the method for determining ground line position in touch panel includes the following steps:
It calculates the integral capacitor value of the intermediate node capacitive region and is denoted as middle capacitance value；
It calculates the integral capacitor value in the first capacitor area and is denoted as first capacitor value, by the first capacitor value and the centre
Capacitance carries out capacitance comparison, if the first capacitor value and the middle capacitance value are unequal, adjusts first ground connection
The relative position of line and then the size for controlling the first capacitor value, keep it equal with the middle capacitance value；
It calculates the integral capacitor value of second capacitive region and is denoted as the second capacitance, by second capacitance and the centre
Capacitance carries out capacitance comparison, if second capacitance and the middle capacitance value are unequal, adjusts second ground connection
The relative position of line and then the size for controlling second capacitance, keep it equal with the middle capacitance value.
2. touch panel according to claim 1, which is characterized in that first ground line is grounded with being set to described first
The silver wire of line periphery mutually overlaps.
3. touch panel according to claim 1, which is characterized in that first ground line and second ground line are flat
The length of row, first ground line and second ground line is all larger than the length of the driving electrodes.
4. touch panel according to claim 1, which is characterized in that first ground line and second ground line
Material includes metal or transparent conductive material.
5. touch panel according to claim 1, which is characterized in that the touch panel is the support multiple spot of mutual capacitance type
Touch screen.
6. touch panel according to claim 1, which is characterized in that the substrate be plastic cement substrate, the one of the substrate
Face is the touch-surface by cure process, and the another side opposite with the touch-surface is load-bearing surface.
7. the method for ground line position, provides a touch panel, including a substrate, in the substrate in a kind of determining touch panel
Side is successively arranged driving layer and inductive layer, and the driving layer includes the first ground line, the second ground line and several drivings
Electrode, the inductive layer include several induction electrodes；
The single induction electrode with close to the opposite region of the first ground line single driving electrodes of side be the
One node capacitor area is formed between first ground line and the single driving electrodes for being grounded side close to described first
First coupled capacitor area forms the first sub- coupled capacitor area between first ground line and the single induction electrode, described
First node capacitive region, first coupled capacitor area and the first sub- coupled capacitor district's groups synthesize first capacitor area；
The single induction electrode with close to the opposite region of the second ground line single driving electrodes of side be the
Two node capacitor areas are formed between second ground line and the single driving electrodes for being grounded side close to described second
Second coupled capacitor area, the second node capacitive region synthesize the second capacitive region with the second coupled capacitor district's groups；
The middle position of the single induction electrode region opposite with the single driving electrodes is intermediate node capacitive region；
Capacitance error between the capacitance in the first capacitor area and the capacitance of the intermediate node capacitive region and described
Capacitance error between the capacitance of second capacitive region and the capacitance of the intermediate node capacitive region is respectively less than 2%, it is described really
The method for determining ground line position in touch panel specifically includes:
It calculates the integral capacitor value of the intermediate node capacitive region and is denoted as middle capacitance value；
It calculates the integral capacitor value in the first capacitor area and is denoted as first capacitor value, by the first capacitor value and the centre
Capacitance carries out capacitance comparison, if the first capacitor value and the middle capacitance value are unequal, adjusts first ground connection
The relative position of line and then the size for controlling the first capacitor value, keep it equal with the middle capacitance value；
It calculates the integral capacitor value of second capacitive region and is denoted as the second capacitance, by second capacitance and the centre
Capacitance carries out capacitance comparison, if second capacitance and the middle capacitance value are unequal, adjusts second ground connection
The relative position of line and then the size for controlling second capacitance, keep it equal with the middle capacitance value.
8. the method for ground line position in determining touch panel according to claim 7, which is characterized in that calculating described the
The integral capacitor value of one capacitive region is simultaneously denoted as first capacitor value, and the first capacitor value and the middle capacitance value are carried out capacitance
Compare, if the first capacitor value and the middle capacitance value are unequal, adjust it is described first be grounded relative position into
And the size of the first capacitor value is controlled, in the step for keeping it equal with the middle capacitance value, specific steps include:
Calculate separately the electricity of the first node capacitive region, first coupled capacitor area and the first sub- coupled capacitor area
Capacitance is denoted as first node capacitance, the first coupling capacitance and the first sub- coupling capacitance respectively；
It is added the first node capacitance, first coupling capacitance and the first sub- coupling capacitance to obtain institute
State first capacitor value；
The first capacitor value and the middle capacitance value are subjected to capacitance comparison, if the first capacitor value and the intermediate electricity
Capacitance is unequal, then adjusts the relative position of first ground line to change the size of the first capacitor value, make itself and institute
It is equal to state middle capacitance value；
First ground line and the institute close to first ground line are calculated by the variable quantity size of the first capacitor value
State the distance between driving electrodes.
9. the method for ground line position in determining touch panel according to claim 7, which is characterized in that calculating described the
The integral capacitor value of two capacitive regions is simultaneously denoted as the second capacitance, and second capacitance and the middle capacitance value are carried out capacitance
Compare, if second capacitance and the middle capacitance value are unequal, adjust it is described second be grounded relative position into
And the size of second capacitance is controlled, in the step for keeping it equal with the middle capacitance value, specific steps include:
The capacitance for calculating separately the second node capacitive region and second coupled capacitor area, is denoted as second node respectively
Capacitance and the second coupling capacitance；
It is added the second node capacitance and second coupling capacitance to obtain second capacitance；
Second capacitance and the middle capacitance value are subjected to capacitance comparison, if second capacitance and the intermediate electricity
Capacitance is unequal, then adjusts the relative position of second ground line to change the size of second capacitance, make itself and institute
It is equal to state middle capacitance value；
Second ground line, which is calculated, by the variable quantity size of second capacitance is grounded side with close to described second
The distance between driving electrodes.
10. the method for ground line position in determining touch panel according to claim 7, which is characterized in that described first connects
The material of ground wire and second ground line includes metal or transparent conductive material.
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| KR102135908B1 (en) * | 2013-06-26 | 2020-07-21 | 엘지디스플레이 주식회사 | Touch sensing apparatus and method for driving the same |
| US9164136B2 (en) * | 2013-12-02 | 2015-10-20 | Atmel Corporation | Capacitive measurement circuit for a touch sensor device |
| US9552090B2 (en) * | 2014-02-05 | 2017-01-24 | Lg Innotek Co., Ltd. | Touch panel and display with the same |
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Effective date of registration: 20210113 Address after: 435003 Office Room 401, R & D building, building B, 189 Jinshan Avenue, Huangshi economic and Technological Development Zone, Hubei Province Patentee after: Hubei Lianxin Display Technology Co.,Ltd. Address before: 330096 No.59, Chuangxin 1st Road, high tech Development Zone, Nanchang City, Jiangxi Province Patentee before: JIANGXI UNITED THOUGHT TOUCH TECHNOLOGY Co.,Ltd. |