CN104391616A - Method and device for acquiring pixel point capacitance detecting range of touch screens - Google Patents
Method and device for acquiring pixel point capacitance detecting range of touch screens Download PDFInfo
- Publication number
- CN104391616A CN104391616A CN201410707089.5A CN201410707089A CN104391616A CN 104391616 A CN104391616 A CN 104391616A CN 201410707089 A CN201410707089 A CN 201410707089A CN 104391616 A CN104391616 A CN 104391616A
- Authority
- CN
- China
- Prior art keywords
- pixel
- capacitance
- touch
- screen
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a method and a device for acquiring a pixel point capacitance detecting range of touch screens. The method comprises the following steps of acquiring the capacitance of each pixel point of N touch screens; calculating a capacitance mean value and variance of pixel points at the same ith positions on the N touch screens so as to acquire a pixel point capacitance reference range at the ith position; judging whether the capacitance of NxM pixel points on the N touch screen is in the pixel point capacitance reference range of positions corresponding to the NxM pixel points or not; and setting the pixel point capacitance reference range of the ith position as a pixel point capacitance detecting range of a corresponding position when the capacitance of an optional pixel point on an optional touch screen is in the pixel point capacitance reference range of the corresponding position. Each touch screen is provided with M pixel points, the M is an integer greater than 0, the N is a positive integer, and i equals to 1, 2, ..., (M-1) or M. By the method and the device, the problems of false judgment and over judgment on detection of the capacitance in the prior art are solved.
Description
Technical field
The present invention relates to touch-screen detection technique, particularly relate to a kind of acquisition methods and device of pixel capacitance sensing range of touch-screen, and according to the detection method of touch screen that the pixel capacitance sensing range of touch-screen detects touch-screen.
Background technology
Along with digital Age arrives, touch-screen has been widely used in handheld electric products, and the products such as increasing mobile phone, panel computer adopt capacitive touch screen as display screen.Capacitive touch screen utilizes the electric current of human body to respond to carry out work, when finger contact capacitive touch screen, by the change of electric current on touch-screen, draws position, touch point.In the manufacturing process of capacitive touch screen, need to detect manufactured capacitive touch screen, thus select out qualified touch-screen, wherein, qualified touch-screen refers to that capacitance that on this touch-screen, each pixel (pixel) is put is all in normal range, and namely the process therefore whether qualifiedly detecting touch-screen is the process detected each pixel of touch-screen.
The detection method of the mutual capacitance touchscreens that prior art provides, first by checking the capacitance value data of capacitance three-dimensional plot random collecting at least 30 qualified touch-screens, secondly 30 touch-screen condenser paper averages of this pixel are calculated for each pixel, last rule of thumb or chip supplier's suggestion, the electric capacity upper lower limit value (limit) of each for full wafer touch-screen pixel is set as a certain identical value, this limit of usual setting be pixel condenser paper average ± 20%, full wafer touch-screen each pixel capacitance sensing range has set thus.According to the limit value of setting, any a slice touch-screen is detected, when any one pixel of full wafer touch-screen capacitance all its correspondence pixel condenser paper average ± 20% fluctuation range within, then judge that this touch-screen is as qualified touch-screen, if the capacitance of at least one pixel of full wafer touch-screen exceed its pixel condenser paper average ± 20% fluctuation range, then judge that this touch-screen is as defective touch-screen.
Can find out, first, the capacitance fluctuation range of touch-screen each pixel reality is also incomplete same, therefore can produce when detecting with identical limit each pixel phenomenon of sentencing or fail to judge.For the Limit of MOTO4.3qHD at Shanghai module set section, this limit is set to ± and 25%, the capacitance fluctuation that certain sheet T3R8 place detects is for-24.816%, this pixel is considered as qualified point, but be illustrated in figure 1 the actual capacitance three-dimensional plot of this touch-screen, this point should be considered as bad point (NG) point as seen from the figure, illustrates that the Limit preset 25% can cause failing to judge thus; Secondly, by check capacitance three-dimensional plot determine certain touch-screen be certified products or substandard products time, due to larger subjectivity, therefore can not guarantee that everyone result of determination is identical; Finally, in prior art, touch-screen capacitance Limit needs could determine through complicated experimental verification accurately, and labor intensive material resources are larger.
In view of this, the invention provides a kind of acquisition methods and device of pixel capacitance sensing range of touch-screen, to solve the problem of prior art.
First aspect, the acquisition methods of the pixel capacitance sensing range of a kind of touch-screen provided by the invention, the method comprises:
Step one, obtain the capacitance of each pixel of touch-screen described in N sheet, wherein, touch-screen described in every a slice has M described pixel, M be greater than 0 integer, N is positive integer;
Step 2, the capacitance average calculating the described pixel of i-th position identical on touch-screen described in N sheet and variance, to obtain the pixel capacitance term of reference of i-th position, wherein, i=1,2 ..., M-1, M;
Step 3, judge that the capacitance of N*M on touch-screen described in N sheet described pixel is whether in the pixel capacitance term of reference of its correspondence position;
Step 4, when judging that the capacitance of any 1 the described pixel on any 1 described touch-screen is all in the described pixel capacitance term of reference of its correspondence position, arranges the pixel capacitance sensing range of pixel capacitance term of reference as correspondence position of described i-th position.
Further, calculate capacitance average and the variance of the described pixel of i-th position identical on touch-screen described in N sheet, to obtain the pixel capacitance term of reference of i-th position, specifically comprise:
The capacitance of the described pixel of i-th position identical on touch-screen according to N sheet, calculates capacitance average and the variance of i-th position pixel;
According to capacitance average and the variance of described i-th position pixel, the pixel capacitance term of reference according to following formulae discovery i-th position:
LimitD_i＝μ_i-cpk*3*δ_i
LimitU_i＝μ_i+cpk*3*δ_i
Wherein, limitD_i is the lower limit of the pixel capacitance term of reference of described i-th position, limitU_i is the upper limit of the pixel capacitance term of reference of described i-th position, μ _ i is the capacitance average of described i-th position pixel, δ _ i is the capacitance variance of described i-th position pixel, and cpk is process capability parameter.
Further, described process capability parameter cpk is specially: 2 >=cpk >=1.67.
Further, when judging that when step 3 the capacitance of pixel described at least one in N*M described pixel on touch-screen described in N sheet is not in the pixel capacitance term of reference of its correspondence position, the method also comprises:
When described in one or more on any 1 described touch-screen in touch-screen described in judgement L sheet, the capacitance of pixel exceeds the pixel capacitance term of reference of its correspondence position, the capacitance of the pixel of touch-screen described in this L sheet is removed from the capacitance of the pixel of touch-screen described in the N sheet obtained, wherein, L is integer and N >=L>0;
Return step, the capacitance of the current acquisition of this step one as N>L>0 be touch-screen described in residue N-L sheet each described in the capacitance of pixel, as N=L, this step one obtains the capacitance of each pixel of X sheet touch-screen and described in the X sheet of current acquisition, touch-screen is touch-screen described in other X sheets outside touch-screen described in N sheet again, and performs step one successively to step 4.
Further, described in described acquisition N sheet, the capacitance of each pixel of touch-screen is specially the capacitance of each pixel at least obtaining 30 described touch-screens.
Second aspect, the detection method of a kind of touch-screen provided by the invention, the method comprises:
The acquisition methods described in first aspect is adopted to obtain the pixel capacitance sensing range of described touch-screen;
Obtain the capacitance of each pixel of described touch-screen, wherein, described touch-screen has K pixel, K be greater than 0 integer;
Judge that the capacitance of a jth pixel of described touch-screen is whether in its correspondence position pixel capacitance sensing range, wherein, j=1,2 ..., K-1, K;
When the capacitance of each pixel of described touch-screen is all in its correspondence position pixel capacitance sensing range, judge that described touch-screen is as qualified touch-screen, or
When the capacitance of at least one pixel of described touch-screen is not in its correspondence position pixel capacitance sensing range, judge that described touch-screen is as defective touch-screen.
The third aspect, the invention provides a kind of acquisition device of pixel capacitance sensing range of touch-screen, this device comprises:
Capacitance acquisition module, for obtaining the capacitance of each pixel of touch-screen described in N sheet, wherein, touch-screen described in every a slice has M described pixel, M be greater than 0 integer, N is positive integer;
Computing module, for calculating capacitance average and the variance of the described pixel of i-th position identical on touch-screen described in N sheet, to obtain the pixel capacitance term of reference of i-th position, wherein, i=1,2 ..., M-1, M;
Judge module, for judging that the capacitance of N*M on touch-screen described in N sheet described pixel is whether in the pixel capacitance term of reference of its correspondence position;
Module is set, for the capacitance when any 1 the described pixel on any 1 described touch-screen of judgement all in the described pixel capacitance term of reference of its correspondence position, the pixel capacitance sensing range of pixel capacitance term of reference as correspondence position of described i-th position is set.
Further, described computing module comprises:
First computing unit, the capacitance of the described pixel of i-th position identical on touch-screen according to N sheet, calculates capacitance average and the variance of i-th position pixel;
Second computing unit, for according to the capacitance average of described i-th position pixel and variance, the pixel capacitance term of reference according to following formulae discovery i-th position:
LimitD_i＝μ_i-cpk*3*δ_i
LimitU_i＝μ_i+cpk*3*δ_i
Wherein, limitD_i is the lower limit of the pixel capacitance term of reference of described i-th position, limitU_i is the upper limit of the pixel capacitance term of reference of described i-th position, μ _ i is the capacitance average of described i-th position pixel, δ _ i is the capacitance variance of described i-th position pixel, and cpk is process capability parameter.
Further, described process capability parameter cpk is specially: 2 >=cpk >=1.67.
Further, when judging that when described judge module the capacitance of pixel described at least one in N*M described pixel on touch-screen described in N sheet is not in the pixel capacitance term of reference of its correspondence position, this device also comprises:
Remove module, for exceeding the pixel capacitance term of reference of its correspondence position when the capacitance of pixel described in one or more on any 1 described touch-screen in touch-screen described in judgement L sheet, the capacitance of the pixel of touch-screen described in this L sheet is removed from the capacitance of the pixel of touch-screen described in the N sheet obtained, wherein, L is integer and N >=L>0;
Return module, for returning described capacitance acquisition module, the capacitance of the current acquisition of described capacitance acquisition module as N>L>0 be touch-screen described in residue N-L sheet each described in the capacitance of pixel, as N=L, described capacitance acquisition module obtains the capacitance of each pixel of X sheet touch-screen and described in the X sheet of current acquisition, touch-screen is touch-screen described in other X sheets outside touch-screen described in N sheet again, and performs computing module, judge module successively and arrange module.
Further, described capacitance acquisition module is specially the capacitance of each pixel at least obtaining 30 described touch-screens.
The acquisition methods of the pixel capacitance sensing range of a kind of touch-screen provided by the invention and device, according to the capacitance of the touch-screen pixel obtained, computation of mean values and variance, to draw pixel capacitance term of reference, and the pixel capacitance term of reference of pixel capacitance and correspondence position is compared, know that whether this pixel is for certified products with this, only have when obtain the capacitance of each pixel of touch-screen all in its correspondence position pixel capacitance term of reference, just correspondence position pixel capacitance term of reference is set to correspondence position pixel capacitance sensing range, by pixel capacitance sensing range, other any touch-screens are detected.The present invention is without the need to by checking whether three-dimensional plot determination touch-screen is certified products, solve the problem judging subjectivity between different people, secondly sensing range is set separately for each pixel, solve different pixels point capacitance to fluctuate different problem, finally when technological parameter changes without the need to through complex experiment determination corresponding capacitance value fluctuation bound, only need collect the capacitance value data of current touch screen, method provided by the invention and/or device is adopted to calculate, computing method of the present invention are simple, can not cause fails to judge or cross sentences, solve prior art pixel capacitance and detect failing to judge of bound existence, cross and sentence problem.
Summary of the invention
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, introduce doing one to the accompanying drawing used required in embodiment or description of the prior art simply below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the actual capacitance three-dimensional plot of MOTO4.3qHD touch-screen;
Fig. 2 is the distribution plan of the pixel capacitance of 102 qualified touch-screens provided by the invention;
The process flow diagram of the acquisition methods of the pixel capacitance sensing range of a kind of touch-screen that Fig. 3 provides for the embodiment of the present invention one;
The schematic diagram of the acquisition device of the pixel capacitance sensing range of a kind of touch-screen that Fig. 4 provides for the embodiment of the present invention three.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, hereinafter with reference to the accompanying drawing in the embodiment of the present invention, by embodiment, technical scheme of the present invention is described clearly and completely, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
With reference to figure 2, for the distribution plan of the pixel capacitance of 102 qualified touch-screens provided by the invention, before proposition technical scheme of the present invention, staff has added up the capacitance value data of at least 102 qualified touch-screens, the equal Normal Distribution of each pixel capacitance of empirical tests touch-screen, Fig. 2 be matching after the regularity of distribution of each pixel capacitance, wherein, the longitudinal axis represents probability density, transverse axis represents pixel capacitance, it can thus be appreciated that, the capacitance of each pixel of qualified touch-screen should be distributed in in central value (0.36) a certain scope that is benchmark, therefore based on process capability parameter (CPK, Complex Process Capabilityindex) incomplete same limit is arranged to each pixel could can not cause any touch-screen and sentence, to fail to judge problem.CPK is for representing process capability, and reflect the height of process yield, CPK is larger, and process capability could be stronger, can produce good quality, product that reliability is high.
Embodiment one
With reference to figure 3, the process flow diagram of the acquisition methods of the pixel capacitance sensing range of a kind of touch-screen provided for the embodiment of the present invention one.The technical scheme of the present embodiment is applicable to the capacitance sensing range obtaining each pixel of touch-screen based on round-robin algorithm, with situation about detecting identical any a slice touch-screen.Should be utilize the feature that the operational speed of a computer is fast, be applicable to doing repetitive operation based on the pixel capacitance sensing range acquisition methods of round-robin algorithm, certain step (or one group of instruction) is repeated, when each these steps of execution (or this group instruction), all release its a new value from the initial value of variable.The method can be performed by the acquisition device of the pixel capacitance sensing range of touch-screen, and this device can adopt the mode of software and/or hardware to realize, and configuration performs in a computer.
As shown in Figure 3, the method comprises the following steps:
Step 110, obtain the capacitance of each pixel of touch-screen described in N sheet, wherein, touch-screen described in every a slice has M described pixel, M be greater than 0 integer, N is positive integer.
As mentioned above, pixel English is Pixel, be again Picture element, pixel has memory capacitance, when pixel exports data, first can need in the memory capacitance of first for data writing pixel point, wait until that write cycle terminates, that is data with form of electrical charges to memory capacitance charging after, pixel starts to present view data, explain from the angle of computer technology, pixel refers to the least unit that the picture of display screen shows.Each touch-screen has multiple pixel, and namely the capacitance obtaining touch-screen is obtain the capacitance in the memory capacitance of each pixel on touch-screen, and at this, setting touch-screen has M the pixel arranged in the form of an array.
Preferably, described in described acquisition N sheet, the capacitance of each pixel of touch-screen is specially the capacitance of each pixel at least obtaining 30 described touch-screens.
As mentioned above, in N sheet touch-screen, the pixel of any a slice touch-screen adds up to M, and on touch-screen, same position has a pixel all separately.When setting N and being at least 30, the capacitance of each pixel of random collecting at least 30 touch-screens, accordingly, namely the capacitance of 30*M pixel is obtained, at this, do not need the capacitance considering each pixel whether abnormal, do not need to consider whether touch-screen is certified products, and the product touch-screens off quality such as fault, short circuit or non-burning or non-similar touch-screen then should as target touch-screens yet.
This step 110 only needs to obtain at random the capacitance value data of at least N sheet normal touch screen, compared with prior art, whether qualified do not need by checking capacitance three-dimensional plot determination pixel distribution of capacitance values, thus ensure that and can not occur different judgement testing results according to individual subjectivity, make the pixel capacitance sensing range of follow-up acquisition accurate.
Step 120, the capacitance average calculating the described pixel of i-th position identical on touch-screen described in N sheet and variance, to obtain the pixel capacitance term of reference of i-th position, wherein, i=1,2 ..., M-1, M.
As mentioned above, average (average) is the amount number representing trend in a group data set, the business of that be one group of data and organize data divided by this number gained, in statistical work, average describes data information central tendency and dispersion degree, also illustrates a statistic of data centralization position.Variance be each data respectively with the difference of its average square and average, be used for measuring the departure degree between its mathematical expectation of random sum (average), in statistical work, variance describes the off-centered degree of data, weigh the fluctuation size of data, variance is larger, illustrates that data fluctuations is larger, more unstable.
At this, calculate average and the variance of the pixel capacitance of same position on N sheet touch-screen, then can should be appreciated that capacitance fluctuation size and the stability of the pixel of touch-screen same position mutually.Need average and the method for the pixel obtaining each same position on touch-screen successively in this step, at this, pixel number corresponding to each same position is N, correspondingly obtains N number of capacitance value data.
For step 120, specifically comprise at this preferred embodiment:
The capacitance of the described pixel of i-th position identical on step 121, touch-screen according to N sheet, calculates capacitance average and the variance of i-th position pixel.
In step 110 known, obtain the capacitance of each pixel of N sheet touch-screen, the pixel capacitance for i-th position identical on N sheet touch-screen is needed to calculate corresponding average and variance in this step, at this, for the 1st position identical on N sheet touch-screen, from N*M the pixel capacitance value data obtained, extract the pixel capacitance of the 1st the identical position of N sheet touch-screen, N number of pixel capacitance can be extracted thus.
At this, pixel capacitance of the 1st position identical on the N sheet touch-screen extracted is labeled as x successively
1, x
2, x
3..., x
n-2, x
n-1, x
n, the pixel capacitance average of the 1st position is labeled as μ _ 1, and variance is labeled as δ _ 1, then pixel capacitance average and the variance of the 1st identical on N sheet touch-screen position calculate according to following formula (1) and (2):
Pixel capacitance average and the variance of the 1st position identical on N sheet touch-screen is drawn according to above-mentioned formulae discovery, the like, according to average and formula of variance, corresponding pixel capacitance average and the variance calculating other i-th identical position on N sheet touch-screen, wherein, i=1,2, M-1, M, then the average of each position can be labeled as successively μ _ 1, μ _ 2 ..., μ _ M-1, μ _ M, the variance of each position can and be labeled as δ _ 1, δ _ 2 ..., δ _ M-1, δ _ M.
For the pixel capacitance of any one position identical on N sheet touch-screen, relative in prior art according to the fluctuation range of mean value definition pixel capacitance, average and variance more accurately can draw the fluctuation size of each pixel capacitance, corresponding, the result of the follow-up pixel capacitance sensing range calculated according to average and variance is more stable and reliable.
Step 122, according to the capacitance average of described i-th position pixel and variance, the pixel capacitance term of reference according to following formulae discovery i-th position:
LimitD_i＝μ_i-cpk*3*δ_i
LimitU_i＝μ_i+cpk*3*δ_i
Wherein, limitD_i is the lower limit of the pixel capacitance term of reference of described i-th position, limitU_i is the upper limit of the pixel capacitance term of reference of described i-th position, μ _ i is the capacitance average of described i-th position pixel, δ _ i is the capacitance variance of described i-th position pixel, and cpk is process capability parameter.
Known cpk reflects the height of process yield, in this cpk value according to touch-screen, capacitance average μ _ i and variance δ _ i calculates higher limit and the lower limit of pixel capacitance, for the pixel capacitance upper lower limit value of the 1st position, LimitD_1=μ _ 1-cpk*3* δ _ 1, LimitU_1=μ _ 1+cpk*3* δ _ 1, so the numerical range of LimitD_1 ~ LimitU_1 is the pixel capacitance bound scope of the 1st position that N sheet touch-screen is identical, defective touch-screen may be there is due in the N sheet touch-screen that obtains at first, so the capacitance bound scope calculated can not as capacitance sensing range application accurately, can the sensing range of infinite approach 100% certified products touch-screen that goes out of actual computation subsequently through loop iteration algorithm.Product, therefore the current pixel capacitance bound scope calculated is only capacitance term of reference.The like, calculate the pixel capacitance term of reference of other M-1 position.
Preferably, described process capability parameter cpk is specially: 2 >=cpk >=1.67.
This step 120 is by means of only the average μ _ i of the pixel capacitance of i-th position calculated and variance δ _ i, and process capability parameter cpk, the pixel capacitance term of reference of i-th position of N sheet touch-screen can be calculated, the pixel capacitance term of reference computing method of each position are simple, capacitance according to its correspondence position pixel is determined, combine the phenomenon that the capacitance fluctuation range of touch-screen each pixel reality is different, therefore follow-up can not generation when detecting each pixel according to pixel capacitance term of reference is sentenced or is failed to judge, the corresponding mistake also solving prior art is sentenced, to fail to judge problem.
Step 130, judge that the capacitance of N*M on touch-screen described in N sheet described pixel is whether in the pixel capacitance term of reference of its correspondence position.
Known steps 120 has drawn the term of reference LimitD_i ~ LimitU_i of i-th position pixel capacitance identical on N sheet touch-screen, wherein, i=1, 2, M-1, M, so according to the term of reference of i-th position pixel capacitance, judge that the capacitance of i-th position pixel identical on N sheet touch-screen is whether in the pixel capacitance term of reference LimitD_i ~ LimitU_i of this i-th position, if, then judge other M-1 position pixel capacitances successively whether in the pixel capacitance term of reference of its correspondence position, judgement can be carried out to whole N*M pixel capacitance thus to detect.
At this, preferred deterministic process can also judge based on order or random fashion N number of at the most pixel corresponding to each position, its detailed process is: if when judging based on sequential system, according to the 1st position pixel capacitance term of reference, judge that whether the 1st position pixel capacitance identical on N sheet touch-screen be at the 1st position pixel capacitance term of reference LimitD_1 ~ LimitU_1, if so, then order judges the 2nd position pixel capacitance, if not, suppose there be the 1st position pixel capacitance of 3 touch-screens in N sheet touch-screen not in LimitD_1 ~ LimitU_1, when then order judges the 2nd position pixel capacitance, reject the pixel of the 2nd position of these 3 touch-screens, only the capacitance of the 2nd position pixel of N-3 sheet touch-screen is judged, if have the 2nd position pixel capacitance of 5 touch-screens in N-3 sheet touch-screen not in LimitD_2 ~ LimitU_2, when then order judges the 3rd position pixel capacitance, reject this 5 touch-screens, only the capacitance of the 3rd position pixel of N-3-5 sheet touch-screen is judged, the like, to the judgement object of each position, when pixel capacitance judges, judge that the number of object may sequentially reduce.If when judging based on random fashion, then similar with sequential system process, its difference is only, for the 1st position, after having judged the 1st position pixel capacitance, may judge M position pixel capacitance at random, the number of the judgement object of its each position also may sequentially reduce.In this process, the touch-screen at defective pixel place is no longer judged, alleviate judgement workload.
In this step 130, by the pixel capacitance term of reference according to i-th position, judge that N number of pixel capacitance of i-th position on N sheet touch-screen is whether in LimitD_i ~ LimitU_i, thus each pixel on N sheet touch-screen is judged, and the limit of each pixel of full wafer touch-screen is incomplete same, what relatively solve prior art arranges for each pixel that the mistake that identical limit causes is sentenced, problem of failing to judge.
Step 140, when judging that the capacitance of any 1 the described pixel on any 1 described touch-screen is all in the described pixel capacitance term of reference of its correspondence position, arranges the pixel capacitance sensing range of pixel capacitance term of reference as correspondence position of described i-th position.
As mentioned above, when judging that the capacitance of each pixel on current all touch-screens is all in the pixel capacitance term of reference of its correspondence position, so the current all touch-screens of respective description are certified products, also can think that each the position pixel capacitance term of reference calculated is the pixel capacitance value range of the qualified touch-screen of infinite approach 100%, therefore the pixel capacitance term of reference of each position of this all touch-screen can be set to the pixel capacitance sensing range of correspondence position.According to each position pixel capacitance sensing range on the touch-screen obtained, can detect other any a slice touch-screens, whether qualified to detect touch-screen.
In this step 140, the capacitance of the pixel of any a slice touch-screen in current all touch-screens is all positioned at the capacitance term of reference of its correspondence position, each the position pixel capacitance term of reference calculated is the pixel capacitance value range of the qualified touch-screen of infinite approach 100%, so can not causing fails to judge or cross sentences, and what also can solve that capacitance in prior art detects that limit exists fails to judge, crosses and sentence problem.
Preferably, when judging that when step 130 capacitance of pixel described at least one in N*M described pixel on touch-screen described in N sheet is not in the pixel capacitance term of reference of its correspondence position, the method is further comprising the steps of:
Step 131, exceed the pixel capacitance term of reference of its correspondence position when the capacitance judging on any 1 described touch-screen in touch-screen described in L sheet described in one or more pixel, the capacitance of the pixel of touch-screen described in this L sheet is removed from the capacitance of the pixel of touch-screen described in the N sheet obtained, wherein, L is integer and N >=L>0.
As mentioned above, if judge, the capacitance of one or more pixels on any 1 touch-screen in L sheet touch-screen exceeds the pixel capacitance term of reference of its correspondence position, illustrate that this L sheet touch-screen is unacceptable product, so need at this pixel capacitance value data rejecting this L sheet touch-screen from the capacitance value data of each pixel of the initial N sheet touch-screen obtained, then the capacitance value data of current residual is the capacitance value data of each pixel of N-L sheet touch-screen.In addition, contain the defective capacitance value data of L sheet touch-screen in capacitance value data due to N sheet touch-screen, the pixel capacitance term of reference so calculated according to the capacitance value data of N sheet touch-screen not can be used as the pixel capacitance sensing range of touch-screen yet.
Step 132, return step 110, the capacitance of the current acquisition of this step 110 as N>L>0 be touch-screen described in residue N-L sheet each described in the capacitance of pixel, as N=L, this step 110 obtains the capacitance of each pixel of X sheet touch-screen and described in the X sheet of current acquisition, touch-screen is touch-screen described in other X sheets outside touch-screen described in N sheet again, and performs step 110 successively to step 140.
As mentioned above, underproof L sheet touch-screen is comprised in known N sheet touch-screen, after so rejecting the pixel capacitance value data of L sheet touch-screen, according to the capacitance value data of each pixel of the N-L sheet touch-screen of current residual, recalculate the pixel capacitance term of reference of remaining N-L sheet touch-screen, with the capacitance value range making the sensing range of each the pixel capacitance calculated infinitely approach 100% qualified touch-screen.Namely the acquisition methods of the sensing range of this touch-screen pixel capacitance is obtain based on loop iteration algorithm.
At this, the step obtaining the pixel capacitance term of reference of N-L sheet touch-screen is the capacitance value data that step 110 obtains is remaining capacitance after rejecting L sheet touch-screen capacitance value data, pixel capacitance average and the variance of i-th position identical on remaining N-L sheet touch-screen is calculated in step 120, obtain the pixel capacitance term of reference of N-L sheet touch-screen thus, (N-L) * M pixel capacitance on N-L sheet touch-screen is judged whether in the pixel capacitance term of reference of its correspondence position in step 130, if in step 140 in N-L sheet touch-screen the pixel capacitance of any a slice touch-screen all in the pixel capacitance term of reference of its correspondence, then this N-L sheet touch-screen is certified products, in the pixel electric capacity calculated, term of reference is set as the sensing range of touch-screen pixel capacitance, and can detect other any touch-screens.If certainly have defective touch-screen in N-L sheet touch-screen, then similar continuation proposes the capacitance value data of defective touch-screen, step 110-140 is repeated successively according to loop iteration algorithm, until judge that the capacitance of any 1 the described pixel on any 1 described touch-screen is all in the described pixel capacitance term of reference of its correspondence position, arranges the pixel capacitance sensing range that pixel capacitance term of reference is correspondence position thus.
In addition, when in step 131, to judge in N sheet touch-screen that in every a slice touch-screen, at least one pixel capacitance is not in its correspondence position pixel capacitance term of reference, then illustrate that this N sheet touch-screen is unacceptable product, need outside N sheet touch-screen, the pixel capacitance of random collecting X sheet touch-screen again again, till getting pixel capacitance sensing range in step 140.
This step 131-132, as circulation step, by rejecting unacceptable product, carries out loop iteration algorithm to remaining touch-screen, to make the pixel capacitance sensing range infinite approach 100% certified products scope calculated.
The acquisition methods of the pixel capacitance sensing range of a kind of touch-screen that the embodiment of the present invention one provides, pixel capacitance term of reference is calculated according to the average of pixel and variance, and the pixel capacitance term of reference of pixel capacitance and correspondence position is compared, know that whether this pixel is for certified products with this, by the algorithm of loop iteration, only have when obtain the capacitance of each pixel of touch-screen all in its correspondence position pixel capacitance term of reference, just correspondence position pixel capacitance term of reference is set to correspondence position pixel capacitance sensing range.The pixel capacitance sensing range calculated by the method is not simple set identical fluctuation range to whole piece touch-screen, but set separately a sensing range for each pixel, make the pixel capacitance sensing range of setting more accurate, rationally, erroneous judgement problem of failing to judge can not be brought, in addition without the need to by checking that three-dimensional plot determines whether certain touch-screen is certified products, solve the problem judging subjectivity between different people, and when other changes in process parameters of touch-screen without the need to through complex experiment determination pixel capacitance Limit, only need the capacitance value data of collecting current touch screen, adopt the method to calculate and can draw accurately reasonably pixel capacitance sensing range.
Embodiment two
The invention provides a kind of detection method of touch-screen, the method comprises:
The acquisition methods of the touch-screen pixel capacitance sensing range that step 210, employing embodiment one provide obtains the pixel capacitance sensing range of described touch-screen.
Set touch-screen to be detected and there is K pixel, method so according to embodiment one, get K pixel capacitance sensing range on touch-screen to be detected, then a jth position pixel capacitance sensing range for touch-screen to be detected is labeled as LimitD_j ~ LimitU_j, wherein, and j=1,2,, K-1, K.
Step 220, obtain the capacitance of each pixel of described touch-screen, wherein, described touch-screen has K pixel, K be greater than 0 integer.
At this, obtain the capacitance of each pixel of touch-screen to be detected, this touch-screen has K pixel, so obtains K pixel capacitance value data on touch-screen to be detected at this.
Step 230, judge that the capacitance of a jth pixel of described touch-screen is whether in its correspondence position pixel capacitance sensing range, wherein, j=1,2 ..., K-1, K.
Suppose that a jth pixel is positioned at a jth position of touch-screen, so according to jth position pixel capacitance sensing range LimitD_j ~ LimitU_j, judge that a jth pixel capacitance of current touch-screen to be detected is whether within LimitD_j ~ LimitU_j, wherein, j=1,2 ... K-1, K.
If the jth of a current touch-screen to be detected pixel capacitance is within LimitD_j ~ LimitU_j, then order or the random next pixel capacitance on touch-screen to be detected is detected, at this, can all detect the K on touch-screen to be detected pixel capacitance successively.
Preferably, can also work as when judging that certain 1 pixel capacitance on touch-screen to be detected is not in its correspondence position pixel capacitance sensing range first, stop the detection to this touch-screen to be detected, judge that this current touch-screen to be detected is as unacceptable product, and start to detect to next one touch-screen to be detected successively, this process is corresponding decreases the time and workload of detecting any a slice touch-screen.
Step 240, when the capacitance of each pixel of described touch-screen is all in its correspondence position pixel capacitance sensing range, judge that described touch-screen is as qualified touch-screen, or
When the capacitance of at least one pixel of described touch-screen is not in its correspondence position pixel capacitance sensing range, judge that described touch-screen is as defective touch-screen.
According to the judged result of step 230, judge that touch-screen to be detected is as the qualified touch-screen also qualified touch-screen of right and wrong, and after touch-screen to be detected judges whether qualified completing, the to be detected touch-screen identical to the next one successively according to the pixel capacitance sensing range of step 210 acquisition detects.
The detection method of a kind of touch-screen provided by the invention, testing process is simple, the sensing range different according to each the pixel capacitance obtained, the judgement of its sensing range is carried out for each pixel capacitance, the pixel capacitance of each touch-screen making judgement qualified is in the pixel capacitance value range of 100% certified products, can not produce and sentence or fail to judge, and also solve during capacitance in current techniques detects the mistake existed and sentence or problem of failing to judge.
Embodiment three
With reference to figure 4, the schematic diagram of the acquisition device of the pixel capacitance sensing range of a kind of touch-screen provided for the embodiment of the present invention three, the technical scheme of the present embodiment by arranging the capacitance scope of each pixel of touch-screen, with situation about detecting identical any a slice touch-screen.This device can adopt the mode of software and/or hardware, and configuration is applied in a computer.
This device comprises: capacitance acquisition module 310, computing module 320, judge module 330 and arrange module 340.
Wherein, capacitance acquisition module 310 is for obtaining the capacitance of each pixel of touch-screen described in N sheet, and wherein, touch-screen described in every a slice has M described pixel, M be greater than 0 integer, N is positive integer; Computing module 320 for calculating capacitance average and the variance of the described pixel of i-th position identical on touch-screen described in N sheet, to obtain the pixel capacitance term of reference of i-th position, wherein, i=1,2 ..., M-1, M; Judge module 330 is for judging that the capacitance of N*M on touch-screen described in N sheet described pixel is whether in the pixel capacitance term of reference of its correspondence position; Module 340 is set for working as the capacitance of any 1 the described pixel judged on any 1 described touch-screen all in the described pixel capacitance term of reference of its correspondence position, the pixel capacitance sensing range of pixel capacitance term of reference as correspondence position of described i-th position is set.
Further, described computing module 320 comprises: the first computing unit 321 and the second computing unit 322.
Wherein, the capacitance of the described pixel of i-th position that the first computing unit 321 is identical on touch-screen according to N sheet, calculates capacitance average and the variance of i-th position pixel; Second computing unit 322 for according to the capacitance average of described i-th position pixel and variance, the pixel capacitance term of reference according to following formulae discovery i-th position:
LimitD_i＝μ_i-cpk*3*δ_i
LimitU_i＝μ_i+cpk*3*δ_i
Wherein, limitD_i is the lower limit of the pixel capacitance term of reference of described i-th position, limitU_i is the upper limit of the pixel capacitance term of reference of described i-th position, μ _ i is the capacitance average of described i-th position pixel, δ _ i is the capacitance variance of described i-th position pixel, and cpk is process capability parameter.
Further, described process capability parameter cpk is specially: 2 >=cpk >=1.67.
Further, when judging that when described judge module 330 capacitance of pixel described at least one in N*M described pixel on touch-screen described in N sheet is not in the pixel capacitance term of reference of its correspondence position, this device also comprises: remove module and return module.
Wherein, remove module for exceeding the pixel capacitance term of reference of its correspondence position when the capacitance of pixel described in one or more on any 1 described touch-screen in touch-screen described in judgement L sheet, the capacitance of the pixel of touch-screen described in this L sheet is removed from the capacitance of the pixel of touch-screen described in the N sheet obtained, wherein, L is integer and N >=L>0; Return module for returning described capacitance acquisition module, the capacitance of the current acquisition of described capacitance acquisition module as N>L>0 be touch-screen described in residue N-L sheet each described in the capacitance of pixel, as N=L, described capacitance acquisition module obtains the capacitance of each pixel of X sheet touch-screen and described in the X sheet of current acquisition, touch-screen is touch-screen described in other X sheets outside touch-screen described in N sheet again, and performs computing module, judge module successively and arrange module.
Further, described capacitance acquisition module 310 is specially the capacitance of each pixel at least obtaining 30 described touch-screens.
The acquisition device of the pixel capacitance sensing range of a kind of touch-screen that the embodiment of the present invention three provides, not that identical fluctuation range is set to whole piece touch-screen by the pixel capacitance sensing range calculated, but set separately a sensing range for each pixel, make the pixel capacitance sensing range of setting more accurate, rationally, erroneous judgement problem of failing to judge can not be brought, in addition without the need to by checking that three-dimensional plot determines whether certain touch-screen is certified products, solve the problem judging subjectivity between different people, and when other changes in process parameters of touch-screen without the need to through complex experiment determination pixel capacitance Limit, only need the capacitance value data of collecting current touch screen, adopt this device can draw accurately reasonably pixel capacitance sensing range.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (11)
1. an acquisition methods for the pixel capacitance sensing range of touch-screen, is characterized in that, comprising:
Step one, obtain the capacitance of each pixel of touch-screen described in N sheet, wherein, touch-screen described in every a slice has M described pixel, M be greater than 0 integer, N is positive integer;
Step 2, the capacitance average calculating the described pixel of i-th position identical on touch-screen described in N sheet and variance, to obtain the pixel capacitance term of reference of i-th position, wherein, i=1,2 ..., M-1, M;
Step 3, judge that the capacitance of N*M on touch-screen described in N sheet described pixel is whether in the pixel capacitance term of reference of its correspondence position;
Step 4, when judging that the capacitance of any 1 the described pixel on any 1 described touch-screen is all in the described pixel capacitance term of reference of its correspondence position, arranges the pixel capacitance sensing range of pixel capacitance term of reference as correspondence position of described i-th position.
2. acquisition methods according to claim 1, is characterized in that, calculates capacitance average and the variance of the described pixel of i-th position identical on touch-screen described in N sheet, to obtain the pixel capacitance term of reference of i-th position, specifically comprises:
The capacitance of the described pixel of i-th position identical on touch-screen according to N sheet, calculates capacitance average and the variance of i-th position pixel;
According to capacitance average and the variance of described i-th position pixel, the pixel capacitance term of reference according to following formulae discovery i-th position:
LimitD_i＝μ_i-cpk*3*δ_i
LimitU_i＝μ_i+cpk*3*δ_i
Wherein, limitD_i is the lower limit of the pixel capacitance term of reference of described i-th position, limitU_i is the upper limit of the pixel capacitance term of reference of described i-th position, μ _ i is the capacitance average of described i-th position pixel, δ _ i is the capacitance variance of described i-th position pixel, and cpk is process capability parameter.
3. acquisition methods according to claim 2, is characterized in that, described process capability parameter cpk is specially: 2 >=cpk >=1.67.
4. acquisition methods according to claim 1, it is characterized in that, when judging that when step 3 the capacitance of pixel described at least one in N*M described pixel on touch-screen described in N sheet is not in the pixel capacitance term of reference of its correspondence position, the method also comprises:
When described in one or more on any 1 described touch-screen in touch-screen described in judgement L sheet, the capacitance of pixel exceeds the pixel capacitance term of reference of its correspondence position, the capacitance of the pixel of touch-screen described in this L sheet is removed from the capacitance of the pixel of touch-screen described in the N sheet obtained, wherein, L is integer and N >=L>0;
Return step, the capacitance of the current acquisition of this step one as N>L>0 be touch-screen described in residue N-L sheet each described in the capacitance of pixel, as N=L, this step one obtains the capacitance of each pixel of X sheet touch-screen and described in the X sheet of current acquisition, touch-screen is touch-screen described in other X sheets outside touch-screen described in N sheet again, and performs step one successively to step 4.
5. acquisition methods according to claim 1, is characterized in that, described in described acquisition N sheet, the capacitance of each pixel of touch-screen is specially the capacitance of each pixel at least obtaining 30 described touch-screens.
6. a detection method for touch-screen, is characterized in that, comprising:
The acquisition methods described in any one of claim 1-5 is adopted to obtain the pixel capacitance sensing range of described touch-screen;
Obtain the capacitance of each pixel of described touch-screen, wherein, described touch-screen has K pixel, K be greater than 0 integer;
Judge that the capacitance of a jth pixel of described touch-screen is whether in its correspondence position pixel capacitance sensing range, wherein, j=1,2 ..., K-1, K;
When the capacitance of each pixel of described touch-screen is all in its correspondence position pixel capacitance sensing range, judge that described touch-screen is as qualified touch-screen, or
When the capacitance of at least one pixel of described touch-screen is not in its correspondence position pixel capacitance sensing range, judge that described touch-screen is as defective touch-screen.
7. an acquisition device for the pixel capacitance sensing range of touch-screen, is characterized in that, comprising:
Capacitance acquisition module, for obtaining the capacitance of each pixel of touch-screen described in N sheet, wherein, touch-screen described in every a slice has M described pixel, M be greater than 0 integer, N is positive integer;
Computing module, for calculating capacitance average and the variance of the described pixel of i-th position identical on touch-screen described in N sheet, to obtain the pixel capacitance term of reference of i-th position, wherein, i=1,2 ..., M-1, M;
Judge module, for judging that the capacitance of N*M on touch-screen described in N sheet described pixel is whether in the pixel capacitance term of reference of its correspondence position;
Module is set, for the capacitance when any 1 the described pixel on any 1 described touch-screen of judgement all in the described pixel capacitance term of reference of its correspondence position, the pixel capacitance sensing range of pixel capacitance term of reference as correspondence position of described i-th position is set.
8. acquisition device according to claim 7, is characterized in that, described computing module comprises:
First computing unit, the capacitance of the described pixel of i-th position identical on touch-screen according to N sheet, calculates capacitance average and the variance of i-th position pixel;
Second computing unit, for according to the capacitance average of described i-th position pixel and variance, the pixel capacitance term of reference according to following formulae discovery i-th position:
LimitD_i＝μ_i-cpk*3*δ_i
LimitU_i＝μ_i+cpk*3*δ_i
Wherein, limitD_i is the lower limit of the pixel capacitance term of reference of described i-th position, limitU_i is the upper limit of the pixel capacitance term of reference of described i-th position, μ _ i is the capacitance average of described i-th position pixel, δ _ i is the capacitance variance of described i-th position pixel, and cpk is process capability parameter.
9. acquisition device according to claim 8, is characterized in that, described process capability parameter cpk is specially: 2 >=cpk >=1.67.
10. acquisition device according to claim 7, it is characterized in that, when judging that when described judge module the capacitance of pixel described at least one in N*M described pixel on touch-screen described in N sheet is not in the pixel capacitance term of reference of its correspondence position, this device also comprises:
Remove module, for exceeding the pixel capacitance term of reference of its correspondence position when the capacitance of pixel described in one or more on any 1 described touch-screen in touch-screen described in judgement L sheet, the capacitance of the pixel of touch-screen described in this L sheet is removed from the capacitance of the pixel of touch-screen described in the N sheet obtained, wherein, L is integer and N >=L>0;
Return module, for returning described capacitance acquisition module, the capacitance of the current acquisition of described capacitance acquisition module as N>L>0 be touch-screen described in residue N-L sheet each described in the capacitance of pixel, as N=L, described capacitance acquisition module obtains the capacitance of each pixel of X sheet touch-screen and described in the X sheet of current acquisition, touch-screen is touch-screen described in other X sheets outside touch-screen described in N sheet again, and performs computing module, judge module successively and arrange module.
11. acquisition device according to claim 7, is characterized in that, described capacitance acquisition module is specially the capacitance of each pixel at least obtaining 30 described touch-screens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410707089.5A CN104391616B (en) | 2014-11-27 | 2014-11-27 | Method and device for acquiring pixel point capacitance detecting range of touch screens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410707089.5A CN104391616B (en) | 2014-11-27 | 2014-11-27 | Method and device for acquiring pixel point capacitance detecting range of touch screens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104391616A true CN104391616A (en) | 2015-03-04 |
| CN104391616B CN104391616B (en) | 2017-03-22 |
Family
ID=52609528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410707089.5A Active CN104391616B (en) | 2014-11-27 | 2014-11-27 | Method and device for acquiring pixel point capacitance detecting range of touch screens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104391616B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018076332A1 (en) * | 2016-10-31 | 2018-05-03 | 深圳市汇顶科技股份有限公司 | Touchscreen wet state detection method and capacitive touch device |
| CN109601015A (en) * | 2017-07-31 | 2019-04-09 | 深圳市汇顶科技股份有限公司 | Touch screen benchmark determines method, apparatus, touch screen and electric terminal |
| CN111578439A (en) * | 2020-05-27 | 2020-08-25 | 珠海格力电器股份有限公司 | Wet hand detection device, drive-by-wire ware and air conditioner of touch button |
| CN113406429A (en) * | 2021-07-30 | 2021-09-17 | 佛山市墨纳森智能科技有限公司 | Electronic metering device detection method and device, storage medium and electronic equipment |
| CN114490225A (en) * | 2022-04-06 | 2022-05-13 | 合肥创发微电子有限公司 | Method and device for acquiring touch screen pixel point capacitance value mean value and detection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060120575A1 (en) * | 2004-12-04 | 2006-06-08 | Ahn Do S | Method and apparatus for classifying fingerprint image quality, and fingerprint image recognition system using the same |
| CN104040364A (en) * | 2012-11-09 | 2014-09-10 | Jd株式会杜 | Capacity measurement device for touch screen panel |
-
2014
- 2014-11-27 CN CN201410707089.5A patent/CN104391616B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060120575A1 (en) * | 2004-12-04 | 2006-06-08 | Ahn Do S | Method and apparatus for classifying fingerprint image quality, and fingerprint image recognition system using the same |
| CN104040364A (en) * | 2012-11-09 | 2014-09-10 | Jd株式会杜 | Capacity measurement device for touch screen panel |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018076332A1 (en) * | 2016-10-31 | 2018-05-03 | 深圳市汇顶科技股份有限公司 | Touchscreen wet state detection method and capacitive touch device |
| CN108271418A (en) * | 2016-10-31 | 2018-07-10 | 深圳市汇顶科技股份有限公司 | Touch screen moist water state detection method and capacitance touch-control device |
| EP3333685A4 (en) * | 2016-10-31 | 2018-08-08 | Shenzhen Goodix Technology Co., Ltd. | Touchscreen wet state detection method and capacitive touch device |
| US10345976B2 (en) | 2016-10-31 | 2019-07-09 | Shenzhen GOODIX Technology Co., Ltd. | Touch panel wet state detection method and capacitive touch apparatus |
| CN108271418B (en) * | 2016-10-31 | 2021-03-19 | 深圳市汇顶科技股份有限公司 | Method for detecting wet state of touch screen and capacitive touch device |
| CN109601015A (en) * | 2017-07-31 | 2019-04-09 | 深圳市汇顶科技股份有限公司 | Touch screen benchmark determines method, apparatus, touch screen and electric terminal |
| CN109601015B (en) * | 2017-07-31 | 2022-06-07 | 深圳市汇顶科技股份有限公司 | Touch screen reference determination method and device, touch screen and electronic terminal |
| CN111578439A (en) * | 2020-05-27 | 2020-08-25 | 珠海格力电器股份有限公司 | Wet hand detection device, drive-by-wire ware and air conditioner of touch button |
| CN113406429A (en) * | 2021-07-30 | 2021-09-17 | 佛山市墨纳森智能科技有限公司 | Electronic metering device detection method and device, storage medium and electronic equipment |
| CN113406429B (en) * | 2021-07-30 | 2021-11-12 | 佛山市墨纳森智能科技有限公司 | Electronic metering device detection method and device, storage medium and electronic equipment |
| CN114490225A (en) * | 2022-04-06 | 2022-05-13 | 合肥创发微电子有限公司 | Method and device for acquiring touch screen pixel point capacitance value mean value and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104391616B (en) | 2017-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104391616A (en) | Method and device for acquiring pixel point capacitance detecting range of touch screens | |
| CN106227520B (en) | Application interface switching method and device | |
| US10031618B2 (en) | Identifying hover and/or palm input and rejecting spurious input for a touch panel | |
| US9547399B2 (en) | Injected touch noise analysis | |
| CN101901074B (en) | Sensoring apparatus of proximity and contact, and display devices | |
| US8427444B2 (en) | Ghost cancellation method for multi-touch sensitive device | |
| CN101369205B (en) | Capacitive detection system and method, and time-interval measurement module and method | |
| CN102707861B (en) | Electronic equipment and display method thereof | |
| CN105094494A (en) | Fingerprint recognition method, fingerprint recognition device and electronic equipment | |
| US10871862B2 (en) | Touch force detecting method and apparatus, touch panel and display apparatus | |
| CN101369195A (en) | Power efficient capacitive detection method and module | |
| CN102866322A (en) | Touch device detection method | |
| CN101369206A (en) | Capacitive detection module and method | |
| CN105067022B (en) | The detection method and device and touch chip and air-conditioner of capacitance type sensor | |
| CN106951132A (en) | Report point determination method, device, touch-screen and the terminal of capacitive touch screen | |
| US8654089B2 (en) | Touch sensing circuit and touch sensing method | |
| US20150185276A1 (en) | Mutual capacitance touch sensing device and method for inspecting same | |
| CN110442266B (en) | Object recognition method, object recognition device, electronic equipment and storage medium | |
| CN103226424A (en) | Capacitance type touch equipment detecting method and device, and capacitance type touch equipment | |
| CN115454275A (en) | Quality detection method and device of capacitive touch screen and computer equipment | |
| CN104915659B (en) | The test method and system of the fingerprint sensor of terminal | |
| US20110050615A1 (en) | Processing circuit for determining touch points of touch event on touch panel and related method | |
| US20120287078A1 (en) | Multi-touch detection method and device thereof | |
| CN102062817A (en) | Frequency offset detection method and device for crystal oscillator of electronic product | |
| KR101671835B1 (en) | Apparatus and method for non-touch testing touch screen module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |