CN105843461B - Touch device with fingerprint identification function and coordinate operation method thereof - Google Patents
Touch device with fingerprint identification function and coordinate operation method thereof Download PDFInfo
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- 230000006698 induction Effects 0.000 claims abstract description 86
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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
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
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Abstract
The invention relates to a touch device with fingerprint identification and a coordinate operation method thereof, wherein the touch device comprises a touch body with a plurality of sensing units and a fingerprint identifier with a plurality of pixel electrodes, which jointly form a touch detection area; the coordinate operation method comprises the steps of respectively reading first and second capacitance induction quantities of the induction unit and the pixel electrode, dividing the pixel electrodes into a plurality of pixel induction groups, and calculating a third capacitance induction quantity by using the second capacitance induction quantities of the at least two pixel electrodes in each pixel induction group; and finally, calculating the coordinate of a touch object according to the first and third capacitance induction quantities. The invention compensates the capacitance induction quantity which is lacked by the touch control body caused by occupying a part of the touch control detection area by the capacitance induction quantity of the fingerprint identifier.
Description
Technical field
The present invention relates to a kind of coordinate computation method of touch device, espespecially a kind of touch device of tool identification of fingerprint
Coordinate computation method.
Background technology
Part electronic device can be provided with a fingerprint identifier 60 at present, prevent electronic device stolen；With notes type electricity
For brain, 60 position of fingerprint identifier can be arranged on keyboard main case 50, as shown in Figure 8 A, be arranged in keyboard main case 50
The right corner, also have the design being incorporated among the left and right button 611,612 of touching device 61 downside later, such as Fig. 8 B
It is shown.No matter a kind of that set-up mode, be both needed to change the design of keyboard host housing 50.
Therefore, as shown in Figure 8 C, existing manufacturer proposes a kind of touching device 61 ' being integrated with a fingerprint identifier 60, such as
This can need not change the design of keyboard host housing 50.It is recognized on its touching detection zone A to avoid influencing the touching device 61 '
Object is touched, which is mainly disposed to the corner location of touching detection zone A.However, the touching device 61 '
When carrying out the detecting of touching object, when touching object is touched to the fingerprint identifier 60, which can not detection
And identify its touch coordinate, cause the gesture that breaks or judge by accident；Therefore, the setting of the fingerprint identifier 60 can be to the touching device
61 ' impact in coordinate position operation and gesture differentiation, still there is the necessity further improved.
Invention content
Directly add a fingerprint identifier thereon in view of above-mentioned existing touch device, can not detection touching in the fingerprint
The technological deficiency of touching object on identifier, main inventive purpose of the invention are to provide a kind of touch-control dress of tool identification of fingerprint
It sets and its coordinate computation method, to improve this technological deficiency.
Technical way used in above-mentioned purpose to be reached be enable the touch device of the tool identification of fingerprint include one touch
Ontology and a fingerprint identifier are controlled, which collectively forms a touch detection region with the fingerprint identifier, the touch-control sheet
Body includes multiple sensing units, which includes multiple pixel electrodes, and the wherein coordinate computation method includes：
(a) the multiple first capacitive sensing amounts and the identification of fingerprint of multiple sensing units of the touch-control ontology are read respectively
Multiple second capacitive sensing amounts of multiple pixel electrodes of device；
(b) multiple pixel electrode is divided into multiple pixels and incudes group, and obtained to correspond to and represent multiple pixel induction group
Multiple third capacitive sensing amounts, wherein respectively the pixel induction group include at least two pixel electrodes, the respectively third capacitance sense
Should measure is to incude the second capacitive sensing amount operation of at least two pixel electrode in group by the pixel and obtain；And
(c) coordinate of touch-control object is carried out according to multiple first capacitive sensing amount and multiple third capacitive sensing amount
Operation.
Technical way used in above-mentioned purpose to be reached is to enable the touch device of the tool identification of fingerprint include：
One touch-control ontology, including a sensing unit more than one and a touch-induction circuit, touch-induction circuit electrical connection should
Multiple sensing units, and interior have a coordinate computation program；And
One fingerprint identifier, including multiple pixel electrodes and a reading circuit；The reading circuit is electrically connected to multiple fingerprints
Electrode and the touch-induction circuit, the touch-control ontology collectively form a touch detection region with the fingerprint identifier；
Above-mentioned touch-induction circuit executes the coordinate computation program, comprises the steps of：
(a) the multiple first capacitive sensing amounts and the identification of fingerprint of multiple sensing units of the touch-control ontology are read respectively
Multiple second capacitive sensing amounts of multiple pixel electrodes of device；
(b) multiple pixel electrode is divided into multiple pixels via the touch-induction circuit and incudes group, and obtain corresponding generation
Multiple third capacitive sensing amounts of the multiple pixel induction group of table, wherein respectively pixel induction group includes at least two pixels electricity
Pole, respectively the third capacitive sensing amount is that the second capacitive sensing of at least two pixel electrode in group is incuded by the pixel
It measures operation and obtains；And
(c) coordinate of touch-control object is carried out according to multiple first capacitive sensing amount and multiple third capacitive sensing amount
Operation.
By the touch device and its coordinate computation method of the above present invention tool identification of fingerprint it is found that due to the fingerprint identifier
The a part of touch detection region is occupied, therefore when touch-control this swept-volume touch detection region, the present invention is read simultaneously
The second capacitive sensing amount of the fingerprint identifier is taken, and calculates third capacitive sensing amount according to this, is swept with compensating the touch-control ontology
Because capacitive sensing amount lacking in the setting of fingerprint identifier, such touch-control ontology can be obtained complete touch detection area after retouching
The capacitive sensing amount in domain is solved because touching object is by fingerprint identifier, can not the detection touching object fullpath；Change speech
It, the present invention can touch the touch coordinate of object in detection to the touch detection region.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Description of the drawings
Figure 1A：The schematic top plan view of the first embodiment of touch device of the present invention.
Figure 1B：The schematic top plan view of the second embodiment of touch device of the present invention.
Fig. 2A：The schematic side view of the 3rd embodiment of touch device of the present invention.
Fig. 2 B：The schematic side view of the fourth embodiment of touch device of the present invention.
Fig. 2 C：The schematic side view of 5th embodiment of touch device of the present invention.
Fig. 3 A：The partial enlarged view of Fig. 1.
Fig. 3 B：The partial enlarged view of Fig. 3 A.
Fig. 4 A：One functional block diagram of touch-induction circuit and reading circuit of the present invention.
Fig. 4 B：Another functional block diagram of touch-induction circuit and reading circuit of the present invention.
Fig. 5 A：Touch-induction circuit of the present invention reads the induction picture frame of the first capacitive sensing amount of multiple sensing units.
Fig. 5 B：Induction picture frame after Fig. 5 A compensation.
Fig. 5 C：The present invention waits for normalized induction picture frame.
Fig. 6 A：Reading circuit of the present invention reads the induction picture frame of the second capacitive sensing amount of multiple pixel electrodes.
Fig. 6 B：Fig. 6 A correspond to multiple induction picture frames that group's range is incuded as number.
Fig. 7 A：Touch device of the present invention calculates multiple the second initial capacitance senses that group is incuded as number under touchless object
The induction picture frame that should be measured.
Fig. 7 B：Touch device of the present invention calculates multiple the second touching capacitance senses that group is incuded as number under touchless object
The induction picture frame that should be measured.
Fig. 7 C：Touch device of the present invention calculates the induction picture frame of third capacitive sensing amount.
Fig. 7 D：The induction picture frame of third capacitive sensing amounts of Fig. 7 C after regular program.
Fig. 8 A：A kind of schematic diagram of keyboard host housing of an existing notebook computer.
Fig. 8 B：The schematic diagram of another keyboard host housing of an existing notebook computer.
Fig. 8 C：The schematic diagram of another keyboard host housing of an existing notebook computer.
Wherein, reference numeral
10 touch devices
20 touch-control ontologies
201 first circuit boards
21 sensing units
211 x-axis induction electrodes
212 y-axis induction electrodes
22 touch-induction circuits
221 receiving units
222 master controllers
223 signal processing units
30 fingerprint identifiers
301 second circuit boards
31 pixel electrodes
32 reading circuits
40 touching objects
A touch detections region
The first areas A1
A2 second areas
50 shells
60 fingerprint identifiers
61,61 ' touch device
611 left buttons
612 right buttons
Specific implementation mode
Technical solution of the present invention is described in detail in the following with reference to the drawings and specific embodiments, to be further understood that
The purpose of the present invention, scheme and effect, but it is not intended as the limitation of scope of the appended claims of the present invention.
The present invention propose it is a kind of tool identification of fingerprint touch device, the touch device can detection touching in a fingerprint identifier
On touching object coordinate.
Shown in Figure 1A, have the first embodiment of the touch device 10 of identification of fingerprint for the present invention, it includes
There are a touch-control ontology 20 and a fingerprint identifier 30, the touch-control ontology 20 and the fingerprint identifier 30 to collectively form a touch detection
Region A, touch detection region A include an a first area A1 and second area A2, which is correspondingly arranged at
First area A1, and the fingerprint identifier 30 is correspondingly arranged at second area A2.In this present embodiment, second area A2
Positioned at the corner of touch detection region A, second embodiment that also can be as shown in Figure 1B, second area A2, which is located at the touch-control, to be detectd
The centre position of the wherein sides region A is surveyed, but is not limited.
Again please refer to shown in Fig. 2A, which includes that a coordinate is had in multiple sensing units 21 and one
The touch-induction circuit 22 of operation program, multiple sensing unit 21 correspond to the first area A1 settings of touch detection region A
It is formed in a upper surface of a circuit board 201, and is covered by one first protective layer 23, and the touch-induction circuit 22 is via electricity
Road plate 201 is electrically connected with multiple sensing unit 21.The fingerprint identifier 30 includes that multiple pixel electrodes 31 and one read electricity
Road 32, multiple pixel electrode 31 correspond to the second area A2 of touch detection region A, and are formed on a chip 302, and
It is covered by one second protective layer 33, which is located in chip 302, and is electrically connected with multiple pixel electrode 31
It connects；The chip 302 is fixed on a substrate 301 again, and is electrically connected with the circuit board 201 through the substrate 301, keeps the reading electric
Road 32 is electrically connected with the touch-induction circuit 22.To avoid the boundary line between first and second protective layer 23,33 from influencing finger
The feel of sliding, in one embodiment, the upper surface of first and second protective layer 23,33 are concordant, can to avoid this first and
Boundary line between second protective layer 23,33 influences the feel of finger sliding.
In other embodiments, can be as shown in Figure 2 B, wherein the substrate 301 corresponds to the second of touch detection region A
Region A2, and it is directly arranged at the upper surface of the circuit board 201, through weld pad (not being painted) and the circuit board 201 thereon
Corresponding weld pad (not being painted) welding, makes the reading circuit 32 be electrically connected with the touch-induction circuit 22.Alternatively, such as Fig. 2 C institutes
Show, which shares same circuit board with the substrate 301, such reading circuit 32 and the touch-induction circuit 22
It can be electrically connected to each other.
It please refers to shown in Fig. 3 A, is Figure 1A partial enlarged views, multiple sensing unit 21 of the touch-control ontology 20 is in square
Battle array arrangement；Coordinate again shown in Fig. 3 B, by taking diamond induction electrode pattern as an example, each length of sensing unit 21 in the direction of the x axis
Spend (hereinafter referred to as length) for the distance between its two half adjacent of s axis induction electrode 211 covered D1 and its in y
Width (hereinafter referred to as width) in axis direction is the distance between its two half adjacent of y-axis induction electrode 212 covered D2,
Wherein distance D1, D2 is respectively 4mm to 5mm；And multiple pixel electrode 31 of the fingerprint identifier 30 is arranged in arrays, with
For the fingerprint identifier 30 of 508dpi, respectively 31 size of pixel electrode is 50um*50um.For convenience of following explanation, it is assumed that should
Touch-control ontology 20 includes 10*14 sensing units 21, and the fingerprint identifier 30 includes 10*10 pixel electrodes 31, but not with
This quantity is limited.Coordinate Figure 1A shown in, if be set to the 10*10 pixel electrodes 31 of the fingerprint identifier 30 of second area A2 with
One 21 area of sensing unit is unit, then second area A2 can about be divided into the array area of 3*3 sensing unit 21,
So that the 10*10 pixel electrodes 31 can be divided into nine pixel induction group G11~G33 by corresponding.Also, due to the fingerprint identifier
There is the non-inductive frame 33 of one fixed width W on 30 periphery, is influenced by the non-inductive frame 33, in addition to the pixel incudes group
The area of G22 can be corresponded to just except the area of the sensing unit 21, other pixels induction group can then be less than the sensing unit
21 area, it may includes the pixel electrode 31 of unequal number amount also therefore to lead to each pixel induction group G11~G33, such as：
It includes that 3*4 pixel electrode 31 or pixel incude group that pixel, which incudes group G11 comprising 3*3 pixel electrode 31, pixel induction group G12,
G22 includes 4*4 pixel electrode 31.Therefore, in one embodiment, the pixel induction group G11~G33 and the sensing unit 21 it
Between configuration relation can be as shown in Figure 3A, wherein respectively at least one x-axis side and at least one of pixel induction group G11~G33
A y-axis side is aligned the relative side of the sensing unit 21 corresponding to it.
Please refer to again shown in Fig. 4 A, for an embodiment of the touch-induction circuit 22, it includes have a receiving unit 221 and
One master controller 222, the master controller 222 receive the first capacitive sensing of the respectively sensing unit 21 through the receiving unit 221
Amount, when the master controller 222 scans through the whole sensing unit 21, you can obtain an induction picture frame as shown in Figure 5, the only sense
Answering nine positions that the Ty1~Ty3 and Tx1~Tx3 of picture frame interlock not include has the first capacitive sensing amount.The reading circuit 32 is then
The the second capacitive sensing amount for receiving the respectively pixel electrode 31, to obtain an induction picture frame as shown in Figure 6A.In this present embodiment,
Since the reading circuit 32 is electrically connected to the master controller 222 of the touch-induction circuit 22, therefore can be by each pixel electrode 31
The second capacitive sensing amount be sent to the master controller 222, which can be according to setting by multiple pixel electrode 31
It corresponds to respectively the pixel incudes group G11~G33 shown in Fig. 3 A, therefore the induction picture frame of Fig. 6 A can divide sense as shown in Figure 6B accordingly
Picture frame, that is, first group of pixel of corresponding diagram 3A is answered to incude the second capacitive sensing of nine pixel electrodes 31 that group G11 is included
It measures, nine the second capacitive sensing amounts that Py1~Py3 and Px1~Px3 interlocks in as Fig. 6 B, second group of pixel induction group G12 institute
Including 12 pixel electrodes 31 the second capacitive sensing amount, Py4~Py7 and Px1~Px3 interlocks in as Fig. 6 B 12
A second capacitive sensing amount, the second capacitive sensing amount of nine pixel electrodes 31 that third group pixel induction group G13 is included, i.e.,
For Py8~Py10 and Px1~Px3 in Fig. 6 B interlock nine the second capacitive sensing amounts, and so on；Therefore, the master controller
222 after the second capacitive sensing amount for obtaining all pixels electrode 31, can be further with each group pixel induction group G11~G33
Second capacitive sensing amount of corresponding multiple pixel electrodes 31 calculates represent this group of pixel induction group G11~G33's respectively
Third capacitive sensing amount.Therefore, which can get nine groups of pixels positioned at second area A2 as shown in Figure 1A
The third capacitive sensing amount for incuding group G11~G33 uses nine the first capacitive sensings that induction picture frame lacks shown in compensation Fig. 5 A
Amount, and constitute one and completely incude picture frame, which distinguishes the touch detection area shown in Figure 1A according to complete induction picture frame
The touch coordinate of the touching object of any position on the A of domain.
It please refers to again shown in Fig. 3 A and Fig. 4 B, equally includes Fig. 4 B for another embodiment of the touch-induction circuit 22
The receiving unit 221 and the master controller 222, only the master controller 222 be penetrate a signal processing unit 223, such as number
Processor (DSP), single-chip or processor etc. are electrically connected to the reading circuit 32.Therefore, by the signal processing unit 223 according to
Multiple pixel electrode 31 is corresponded to respectively pixel as shown in Figure 3A according to setting and incudes group G11~G33, and in the acquisition institute
After having the second capacitive sensing amount of pixel electrode 31, further with multiple pixels corresponding to each group pixel induction group G11~G33
Second capacitive sensing amount of electrode 31 calculates the third capacitive sensing amount for representing this group of pixel induction group G11~G33 respectively,
The respectively third capacitive sensing amount is sent to the master controller 222 again.Therefore, the master controller 222 of the present embodiment can be direct
It is obtained from the signal processing unit 223, positioned at the third capacitance sense of nine groups of pixels induction group G11~G33 of second area A2
Ying Liang uses nine the first capacitive sensing amounts that induction picture frame lacks shown in compensation Fig. 5 A, and constitutes a complete induction picture frame.
One embodiment of the above-mentioned respectively operation mode of the third capacitive sensing amount further explained below, referring initially to figure
Shown in 7A, when touchless object on touch device 10, the capacitance of multiple pixel electrode 31 of the fingerprint identifier 30 is read
Variable quantity is as the second initial capacitance induction amount, by the of multiple pixel electrode 31 in respectively pixel induction group G11~G33
Two initial capacitance induction amounts are averaged (or being added again after first binaryzation) after being added, as an a reference value.It is as shown in Figure 7 B again, when
The touching object 40 (such as finger) is touched on the fingerprint identifier 30, and multiple pixel electrode of the fingerprint identifier 30 is read
31 multiple capacitance changes correspond to one as the second touching capacitive sensing amount, this means, every 1 second touching capacitive sensing amount
Pixel electrode.Next, by the second touching capacitance sense of multiple pixel electrode 31 in respectively pixel induction group G11~G33
It is averaged (or being added again after first binaryzation) after addition should be measured, as an influence value, each pixel induction group corresponds to an influence value；
Later, respectively a reference value of pixel induction group G11~G33 and the difference of the influence value are calculated, as seen in figure 7 c, and with the difference
It is worth the third capacitive sensing amount as respectively pixel induction group G11~G33.
Due to each the second capacitive sensing amount of the pixel electrode 31 and respectively the first capacitive sensing amount of the sensing unit 21
Numberical range is possible to differ；Therefore, preceding to take off obtained by operation the respectively third capacitive sensing amount further to carry out one regular
Change program.The normalized process is that respectively third capacitive sensing amounts of the pixel induction group G11~G33 after operation can correspond to this
The numeric distribution range of the capacitive sensing amount of sensing unit 21 is according to respectively pixel induction group G11~G33 in the present embodiment
The third capacitive sensing amount of respectively pixel induction group G11~G33 is multiplied by the proportional numbers by a corresponding preset proportional numerical value
After value, allow the induction amount after its operation that the first capacitive sensing amount of sensing unit 21 can be taken as to use, as illustrated in fig. 7d,
So the third capacitive sensing amount can be used for compensating and incude nine the first capacitive sensing amounts that picture frame lacks shown in Fig. 5 A, and
The complete induction picture frame of as shown in Figure 5 B one is constituted, therefore the coordinate that can carry out touch detection region A calculates and gesture identification.
Before take off preset proportional numerical value can via a standard touch object (such as simulation finger touching counterweight) touch respectively
Touch a wherein sensing unit 21 and one of pixel induction group G11, G12 ..., G33, the first induced electricity capacity obtained
The first induced electricity capacity divided by third induced electricity capacity are obtained into a ratio with the third capacitive sensing amount highest (peak value), it should
Ratio is the preset proportional numerical value that group is incuded by the pixel of standard touching object touching.When standard touching object touching
After all pixels incude group G11, G12 ..., G33, obtain corresponding third capacitive sensing amount, then respectively with first inductance capacitance
Measure the ratio for acquisition of being divided by, the preset proportional numerical value of as each pixel induction group.Those preset proportional numerical values can be with table
(table) it is stored.
Again as shown in Figure 3A, since there are the non-inductive frame 33 of one fixed width W, the non-inductive in 30 periphery of fingerprint identifier
Frame 33 is located between the touch-control ontology 20 and fingerprint identifier 30.In order to allow third capacitive sensing amount to compensate lacking in Fig. 5 A
First capacitive sensing amount, and the preferable linearity or signal quality are maintained, respectively the pixel incudes the third of group G11~G33
After capacitive sensing amount further can carry out arithmetic expression progress operation set forth below with its periphery the first capacitive sensing amount, then compensate figure
The first capacitive sensing amount that 5A lacks：
RdVi,j=a+b × dVi,j+c1×dVi-1,j-1+c2×dVi-1,j+c3×dVi-1,j+1+c4*dVi,j-1+c5×dVi,j+1
+c6×dVi+1,j-1+c7×dVi+1,j+c8×dVi+,j+1；Wherein：
RdVi,jThe third capacitive sensing amount of group is incuded for the pixel after normalization；
dVi,jThe third capacitive sensing amount of group is incuded for current pixel；
A is that a dc component corrects constant value；
B is poor between the third capacitive sensing amount and the first capacitive sensing amount of a sensing unit for current pixel induction group
Different proportion；And
C1~c8 is to wait at present between normalized pixel induction group and the first capacitive sensing amount of its periphery sensing unit
Relationship proportion.
By taking Fig. 3 A as an example, when one, which is touched object, touches touch device, the third in the fingerprint identifier 30, six to
Nine pixels induction group is easier to be touched simultaneously with its periphery sensing unit, and because of non-inductive frame 33, there are certain therebetween
The interval of width W, it is therefore assumed that the third capacitive sensing amount dV of the 5th pixels of Fig. 5 C induction group G232,3Normalization is carried out, then
It brings above formula into and the third capacitive sensing amount RdV after its normalization can be obtained2,3For：
RdV2,3=a+b*1785+c1*92+c2* (- 26)+c3*0+c4*2966+c5*0+c6*2778+c7*2626+c8*
51；
Since the 5th pixel induction group G23 and its right sensing unit interface area are larger, therefore above formula can be also reduced to：
RdV2,3=a+b*1785+c5*0；
About the decision of b and c5, it is described as follows.
C5 equally first can touch two sensing units (2,4), (Isosorbide-5-Nitraes) respectively by standard touching object, when the touching sense
When answering unit (2,4), the capacitive sensing values of two adjacent left and right sensing units of the sensing unit (2,4) answer it is roughly the same, therefore can
Sort out a linear equation in two unknowns formula：b*dV2,3+c5*dV2,4=dV2,5；Wherein dV2,3、dV2,4、dV2,5Object is touched through standard
It is known after part touching；For the b and c5 for acquiring unknown, then standard touching object is touched into another sensing unit (Isosorbide-5-Nitrae) again,
Another group of dV can be obtained at this time2,3、dV2,4、dV2,5, therefore another linear equation in two unknowns formula can be sorted out, and with a upper binary
B and c5 is obtained after one way journey solution simultaneous equations.Similarly, c1~c4, c6~c8 can also be found out with same way.
In conclusion the touch device of the present invention incorporates fingerprint identifier 30, which occupies this and touches
The second area A2 of detection area A is controlled, the present invention is also read simultaneously when the touch-control ontology 20 scans touch detection region A
Second capacitive sensing amount of the fingerprint identifier 30, and third capacitive sensing amount is calculated according to this, thereby compensate the touch-control ontology
Because capacitive sensing amount information lacking in the setting of fingerprint identifier 30, such touch-control ontology 20 can be obtained after 20 scannings
The capacitive sensing amount of whole touch detection region A, solves existing device because the mobile route of the touching object 40 passes through fingerprint
Identifier 30, and can not the detection touching object fullpath；In other words, it can be touched in detection to touch detection region A
Touch the touch coordinate of object 40.
Therefore, the coordinate computation method of touch device of the present invention includes：(a) multiple senses of the touch-control ontology are read respectively
Answer multiple first capacitive sensing amounts of unit and multiple second capacitive sensing amounts of multiple pixel electrodes of the fingerprint identifier；
(b) multiple pixel electrode is divided into multiple pixels and incudes group, and obtain the corresponding third electricity for representing multiple pixel induction group
Hold induction amount, wherein respectively pixel induction group includes at least two pixel electrodes, respectively the third capacitive sensing amount is by one
The pixel incudes the second capacitive sensing amount operation of at least two pixel electrode in group and obtains；And (c) according to multiple
First capacitive sensing amount and multiple third capacitive sensing amount carry out the coordinate computation of touch-control object.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe
It knows those skilled in the art and makes various corresponding change and deformations, but these corresponding changes and change in accordance with the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (12)
1. a kind of coordinate computation method of the touch device of tool identification of fingerprint, which is characterized in that the touch device includes one tactile
Ontology and a fingerprint identifier are controlled, which collectively forms a touch detection region with the fingerprint identifier, the touch-control sheet
Body includes multiple sensing units, which includes multiple pixel electrodes, and wherein this method includes：
(a) the multiple first capacitive sensing amounts and the fingerprint identifier of multiple sensing units of the touch-control ontology are read respectively
Multiple second capacitive sensing amounts of multiple pixel electrodes；
(b) multiple pixel electrode is divided into multiple pixels and incudes group, and obtained to correspond to and represent the more of multiple pixel induction group
A third capacitive sensing amount, wherein respectively pixel induction group includes at least two pixel electrodes, each third capacitive sensing amount
It is to incude the second capacitive sensing amount operation of at least two pixel electrode in group by the pixel and obtain；And
(c) the coordinate fortune of touch-control object is carried out according to multiple first capacitive sensing amount and multiple third capacitive sensing amount
It calculates.
2. coordinate computation method as described in claim 1, which is characterized in that read the identification of fingerprint in the step (a) respectively
Multiple second capacitive sensing amounts of multiple pixel electrodes of device further include following steps：
(a1) capacitance change of the fingerprint identifier multiple pixel electrode when not having touching object is read as one second
Initial capacitance induction amount；And
(a2) fingerprint identifier capacitance change of multiple pixel electrode when having touching object is read to touch as one second
Touch capacitive sensing amount.
3. coordinate computation method as claimed in claim 2, which is characterized in that each the of pixel induction group in the step (b)
Three capacitive sensing amounts are further obtained by following steps operation：
(b1) it is averaged, makees after the respectively pixel to be incuded to the second initial capacitance induction amount addition of multiple pixel electrode in group
For an a reference value；
(b2) it is averaged, makees after the respectively pixel to be incuded to the second touching capacitive sensing amount addition of multiple pixel electrode in group
For an influence value；And
(b3) respectively a reference value of pixel induction group and the difference of the influence value are calculated, which is to represent the respectively pixel sense
The third capacitive sensing amount of Ying Qun.
4. coordinate computation method as claimed in claim 2, which is characterized in that each the of pixel induction group in the step (b)
Three capacitive sensing amounts are further obtained by following steps operation：
(b1) add after the respectively pixel to be incuded to the second initial capacitance induction amount difference binaryzation of multiple pixel electrode in group
Always, as an a reference value；
(b2) add after the respectively pixel to be incuded to the second touching capacitive sensing amount difference binaryzation of multiple pixel electrode in group
Always, as an influence value；And
(b3) respectively a reference value of pixel induction group and the difference of the influence value are calculated, which is to represent the respectively pixel sense
The third capacitive sensing amount of Ying Qun.
5. coordinate computation method as described in claim 1, which is characterized in that before executing the step (c), first to the respectively picture
The third capacitive sensing amount of element induction group carries out a regular program, is preset according to one corresponding to respectively pixel induction group
Proportional numerical value, the third capacitive sensing amount that the respectively pixel is incuded to group are multiplied by the proportional numerical value.
6. coordinate computation method as claimed in claim 5, which is characterized in that respectively this corresponding to pixel induction group is preset
Proportional numerical value is obtained by following steps：
After touching respectively pixel induction one of group and multiple sensing unit respectively by touch-control object, the respectively pixel is obtained
Incude the first capacitive sensing amount of the third capacitive sensing amount and the sensing unit of group；And
The ratio for taking the first capacitive sensing amount and the third capacitive sensing amount of respectively pixel induction group of the sensing unit respectively, enables
The ratio is the preset proportional numerical value of corresponding pixel induction group.
7. a kind of touch device of tool identification of fingerprint, which is characterized in that including：
One touch-control ontology, including multiple sensing units and a touch-induction circuit, which is electrically connected multiple sense
Unit is answered, and interior has a coordinate computation program；And
One fingerprint identifier, including multiple pixel electrodes and a reading circuit；The reading circuit is electrically connected to multiple fingerprint electrodes
And the touch-induction circuit, the touch-control ontology collectively form a touch detection region with the fingerprint identifier；
Above-mentioned touch-induction circuit executes the coordinate computation program, comprises the steps of：
(a) multiple first capacitive sensing amounts of multiple sensing units of the touch-control ontology are read via the touch-induction circuit, and
Multiple second capacitive sensing amounts of multiple pixel electrode are read via the reading circuit；
(b) multiple pixel electrode is divided into multiple pixels via the touch-induction circuit and incudes group, and obtaining corresponding represent should
Multiple third capacitive sensing amounts of multiple pixel induction groups, wherein respectively pixel induction group includes at least two pixel electrodes,
Respectively the third capacitive sensing amount is that the second capacitive sensing amount of at least two pixel electrode in group is incuded by the pixel
Operation and obtain；And
(c) the coordinate fortune of touch-control object is carried out according to multiple first capacitive sensing amount and multiple third capacitive sensing amount
It calculates.
8. touch device as claimed in claim 7, which is characterized in that the touch-induction circuit further includes：
One receiving unit is electrically connected to multiple sensing unit, to receive multiple first capacitance sense of multiple sensing unit
Ying Liang；And
One master controller is electrically connected to the receiving unit, with through the receiving unit execute read respectively in the step (a) this touch
Multiple first capacitive sensing amounts of multiple sensing units of ontology are controlled, and the master controller is electrically connected to the reading circuit, with saturating
Cross multiple second capacitance senses that the reading circuit executes the multiple pixel electrodes for reading the fingerprint identifier in the step (a) respectively
Ying Liang；The master controller further executes step (b) and (c) again.
9. touch device as claimed in claim 7, which is characterized in that the touch-induction circuit further includes：
One receiving unit is electrically connected to multiple sensing unit, to receive multiple first capacitive sensings of multiple sensing unit
Amount；
One signal processing unit is electrically connected to the reading circuit, is read respectively with being executed in the step (a) through the reading circuit
The multiple second capacitive sensing amounts and step (b) of multiple pixel electrodes of the fingerprint identifier；And
One master controller is electrically connected to the receiving unit, with through the receiving unit execute read respectively in the step (a) this touch
Multiple first capacitive sensing amounts of multiple sensing units of ontology are controlled, and the master controller is electrically connected to the signal processing unit,
To obtain the third capacitive sensing amount that the respectively pixel incudes group through the signal processing unit；The master controller is further held again
Row step (c).
10. touch device as claimed in claim 7, which is characterized in that wherein：
The touch detection region includes a first area and a second area；
The touch-control ontology further includes a circuit board and one first protective layer, multiple sensing unit correspond to the first area
It is set on the circuit board, and is covered by first protective layer；And
The fingerprint identifier further includes a substrate, one is set to chip and one second protective layer on the substrate, this is more
A pixel electrode corresponds to the second area and is set on the chip, and is covered by second protective layer, and this first and second
The surface of protective layer flushes.
11. touch device as claimed in claim 10, which is characterized in that the circuit board and the substrate are integrated into single circuit
Plate.
12. touch device as claimed in claim 7, which is characterized in that wherein：
The touch detection region includes a first area and a second area；
The touch-control ontology further includes a circuit board and one first protective layer, multiple sensing unit correspond to the first area
It is set on the circuit board, and is covered by first protective layer；And
The fingerprint identifier further includes a substrate, one is set to chip and one second protective layer on the substrate, the base
Plate corresponds to the second area and is set on the circuit board, and multiple pixel electrode corresponds to the second area and is set to the chip, and
It is covered by second protective layer, and the surface of first and second protective layer flushes.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201562109070P | 2015-01-29 | 2015-01-29 | |
| US62/109,070 | 2015-01-29 | ||
| TW104134639 | 2015-10-22 | ||
| TW104134639A TWI549068B (en) | 2015-01-29 | 2015-10-22 | Fingerprint Identifying Touch Device and Coordinates Calculating Method Thereof |
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| CN105843461A CN105843461A (en) | 2016-08-10 |
| CN105843461B true CN105843461B (en) | 2018-09-25 |
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| CN201510864507.6A Expired - Fee Related CN105843461B (en) | 2015-01-29 | 2015-12-01 | Touch device with fingerprint identification function and coordinate operation method thereof |
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| CN106326715B (en) * | 2016-10-20 | 2024-01-23 | 宸美（厦门）光电有限公司 | Fingerprint identification device |
| KR102635898B1 (en) * | 2016-10-25 | 2024-02-15 | 엘지디스플레이 주식회사 | Finger sensor integrated type touch screen device |
| WO2018126368A1 (en) * | 2017-01-05 | 2018-07-12 | 深圳市汇顶科技股份有限公司 | Touch control device and method for determining capacitive sensing amount of touch control device |
| TWI664581B (en) * | 2017-06-15 | 2019-07-01 | 神盾股份有限公司 | Optical fingerprint sensor |
| CN109409320B (en) * | 2018-11-08 | 2022-03-29 | Oppo广东移动通信有限公司 | Fingerprint acquisition method and related equipment |
| CN112347812B (en) * | 2019-08-07 | 2024-04-19 | 群创光电股份有限公司 | Method for detecting fingerprint by electronic device |
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| US20130287274A1 (en) * | 2012-04-29 | 2013-10-31 | Weidong Shi | Methods and Apparatuses of Unified Capacitive Based Sensing of Touch and Fingerprint |
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