CN107402654A - Touch detection method and touch sensing system - Google Patents
Touch detection method and touch sensing system Download PDFInfo
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- CN107402654A CN107402654A CN201610331621.7A CN201610331621A CN107402654A CN 107402654 A CN107402654 A CN 107402654A CN 201610331621 A CN201610331621 A CN 201610331621A CN 107402654 A CN107402654 A CN 107402654A
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- touch
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- critical value
- brightness
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Classifications
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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
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- 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
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Position Input By Displaying (AREA)
Abstract
The present invention is to disclose a kind of touch detection method, using on the electronic installation comprising a CIS, comprising：(a) plural sensing image is captured with the CIS；And (b) acts according to the brightness variation tendency of those sensing images to judge whether an object performs a predetermined touch to the electronic installation.
Description
Technical field
The present invention is related to touch detection method and touch sensing system, changes particularly with regard to using the brightness of image
The touch detection method and touch sensing system of Trend judgement touch.
Background technology
In the modern life, intelligent electric sub-device such as tablet PC, intelligent electric sub-device etc. become more popular.
Such intelligent electric sub-device is typically to be come with capacitance-type touch-control screen as control interface.However, capacitance-type touch-control screen exists
More complicated touch is judged such as double hit, it is all more difficult.Moreover, in some cases, touch control screen is likely difficult to
Judge the touch of user.For example, moved if user has gloves on to implement a touch-control to capacitance touching control interface
Make, because gloves generally have insulation effect, therefore the capacitance of touch control screen will not produce change because of the contact of user.
Under this situation, touch control screen can not judge the touch of user.
In order that intelligent electric sub-device has a more conveniently control interface, some manufacturers are using hardware button come as intelligence
The control interface of energy type electronic installation.Fig. 1 is depicted in known techniques using hardware button come the schematic diagram as control interface.
As shown in figure 1, there is a hardware button 101 on electronic installation 100.This hardware button can be defined as conventional work(by user
Can key.Such hardware button can be integrally fixed at the button on electronic installation 100, or detachable button.No matter however,
It is a kind of that button, all with some shortcomings.
For example, if hardware button 101 is integrally fixed at the button on electronic installation 100, electronic installation 100 must provide
The region for allowing hardware button to install, the trend that modern electronics require succinct is not inconsistent so.In addition, if hardware button 101 is
Dismountable button, then must have on electronic installation 100 with the corresponding hole of hardware button 101 (such as earpiece holes).However, not
The function of its script can not be performed by only installing the hole of hardware button 101, and hardware button 101 be not attached to electronic installation 100
When upper, also easily lost.
The content of the invention
A purpose of the invention is a kind of a kind of touch detection method that touch can be judged according to sensing image of offer.
Another object of the present invention is provide a kind of a kind of touch detection side that touch can be judged according to sensing image
Method.
One embodiment of the invention discloses a kind of touch detection method, using including the electronic installation of a CIS
On, comprising：(a) plural sensing image is captured with the CIS；And (b) becomes according to the brightness of those sensing images change
Gesture acts to judge whether an object performs a predetermined touch to the electronic installation.
Another embodiment of the present invention discloses a kind of touch sensing system, comprising：One CIS, to capture plural number
Sensing image；And a control unit, judge whether an object is right to the brightness variation tendency according to those sensing images
One control interface performs predetermined touch action.
According to previous embodiment, touch can be judged according to sensing image, therefore can avoided in known techniques,
Using capacitance-type touch-control screen or hardware button come as control interface the problem of.
Brief description of the drawings
Fig. 1 is depicted in known techniques using hardware button come the schematic diagram as control interface.
Fig. 2 depict it is according to an embodiment of the invention, the brightness change direction presented using plural sensing image come
Judge the schematic diagram that directionkeys is clicked.
When Fig. 3 depicts finger one click action of execution, the schematic diagram of the change of plural sensing image.
Fig. 4 depicts the brightness that is presented according to plural sensing image to determine whether the schematic diagram of adopting consecutive click chemical reaction.
When Fig. 5 depicts finger executive chairman by action, the schematic diagram for the brightness variation tendency that plural sensing image is presented.
Fig. 6 and Fig. 7 depicts the schematic diagram for the touch that may be mistaken for long-press action.
Fig. 8 depicts judges that a predetermined touch is moved according to different embodiments with the brightness variation tendency according to sensing image
Make the schematic diagram of state machine whether being performed.
Fig. 9 depicts the block diagram of touch sensing system according to an embodiment of the invention.
Drawing reference numeral explanation：
101 hardware buttons
100 electronic installations
Upper key U
Lower key D
Left button L
Right button R
T1-t14 time points
S_1 is without touch-control state
S_2 finger down states
S_3 fingers lift state
S_4 touch acknowledgement states
900 touch sensing systems
901 CISs
903 convergence modules
905 control units
907 counters
909 long-press modules
911 double hit modules
913 directionkeys modules
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Idea of the invention will be illustrated with different embodiments below.So please note that, system, device in the following example
Or module can with hardware (such as：Circuit), or the combination of hardware and software come realize (for example, perform an at least program place
Manage unit).Moreover, the object in the following example is to be illustrated with a finger as example, so please note that, its outside finger
His object (such as stylus) is also applicable in the present invention.In addition, illustrated below with touch control screen as example, but this hair
It is bright to be also used in other touch interfaces (such as optical touch board).
In following examples, plural sensing image first can be captured with a CIS, then again with these sensing images
Brightness variation tendency come judge a finger whether to an electronic installation perform a predetermined touch action.In one embodiment, shadow
Picture sensor is normally opened (always on), so will not just omit any touch, but do not limit.In an embodiment
In, CIS first can capture sensing image with low resolution, be changed when sensing brightness, that is, may have finger to lean on
When near, then switch to and sensing image is captured with high-resolution.
Fig. 2 depict it is according to an embodiment of the invention, the brightness change direction presented using plural sensing image come
Judge the schematic diagram that directionkeys is clicked (for finger image at oblique line, and circle is then external light source image).It is real herein
Apply in example, a plurality of directionkeys, such as upper key U, lower key D, left button L and right button R can be shown on the electronic device.Work as use
Person is intended to click on or during a long-press wherein directionkeys, and a specific rule can be presented in plural sensing image.For example, user is worked as
Click on or during long-press left button L, the shift action moved from right to left would generally be presented in finger.Therefore, it is low as meeting as shown in Figure 2
Luminance area DR_1 first appears at right, then past to move left.In another example, as key U in user's click, finger leads to
It can often present and move from the bottom to top.Therefore, as meeting as shown in Figure 2, low brightness area DR_2 first appears at lower section, then past to move up
It is dynamic.In summary, the embodiment shown in Fig. 2 is the brightness change direction that is presented with plural sensing image to judge object institute point
The directionkeys hit.
Will be described below how judging whether to perform double hit action.In the examples below, electronic installation can be utilized
CIS capture sensing image come as touch judge be used.When Fig. 3 depicts finger one click action of execution,
The schematic diagram (being finger image at oblique line, and circle is then external light source image) of the change of sensing image.As shown in figure 3, work as
When implementing a click action, finger can move closer to touch control screen, therefore sensing image Img (only a sensing image has sign) meeting
Present by bright dimmed situation, such as the sensing image Img in time point t1-t9.And it can be blocked during finger contact touch control screen
Light, therefore sensing image Img can be shadow picture, such as the sensing image Img in time point t10-t11.And finger leave it is tactile
When controlling screen, the situation by secretly brightening, such as the sensing image Img in time point t12-t14 can be presented in sensing image Img.Root
, can be by whether detecting the brightness of plural sensing image higher than a high brightness critical value or to be reduced to one low bright according to Fig. 3 content
Critical value is spent, to determine whether click action.
Fig. 4 depicts the brightness that is presented according to plural sensing image to determine whether the schematic diagram of adopting consecutive click chemical reaction.Root
According to the content disclosed by Fig. 3, if the brightness change of plural sensing image is become lower than by height or equal to low-light level critical value Th_
Low, then become higher than again or equal to high brightness critical value Th_high, then can determine whether that finger performs a click action.Cause
This, in the embodiment shown in fig. 4, finger performs 4 clicks, due to being completed in a predetermined period of time, therefore meeting
It is considered as the double hit action of one 4 double hits.To sum up, Fig. 4 embodiment can show for：If the brightness of sensing image is in a week scheduled time
In phase, the number for increasing to a high brightness critical value Th_high and being reduced to a low-light level critical value Th_low is higher than or waited
In a double hit critical value (such as 2, but also can be other values), then judge predetermined touch action for double hit action.
In an embodiment, the brightness of sensing image can be converged in a convergency value CV.Therefore, as shown in figure 4, ought not have
When object is close to CIS, the mean flow rate of sensing image can be adjusted to be converged in a convergency value CV.It can so allow a little
Hit or double hit action is easier to judge.
Fig. 5 to Fig. 7 depict according to different embodiments with the brightness variation tendency that is presented according to plural sensing image come
Determine whether the schematic diagram of long-press action.The long-press action of finger is to be put down by finger, directly or indirectly pin image sensing
Device, finger, which leave, to be formed.Referring again to Fig. 3, if as it was previously stated, finger contacts touch control screen, sensing image is shadow picture.Cause
This, if finger executive chairman can become more by action, sensing image for the number of shadow picture.Accordingly, when finger executive chairman is by action,
Sensing image may become 4,6 or more for the number of dark image from 2.
Referring to Fig. 5, when it depicts finger executive chairman by action, brightness variation tendency that plural sensing image is presented
Schematic diagram.As shown in figure 5, sensing image be reduced below or equal to low-light level critical value Th_low after (finger down),
The brightness of subsequent sense image can be adjusted to convergency value CV.Please note that, if do not adjust sensing image brightness, now sense shadow
As that should be shadow picture (because being covered by finger).After the brightness of sensing image is continuously the predetermined period of times of convergency value CV mono-
(such as 1 second, but also can be other values), the brightness of subsequent sense image can increase to high brightness critical value Th_high (finger from
Open).Therefore, Fig. 5 embodiment can be shown as follows：If the brightness variation tendency that plural sensing image is presented is brightness reduce to
Less than or equal to convergency value CV is converged to after low-light level critical value Th_low, then brightness increases to again after convergency value CV is returned to
Greater than or equal to high brightness critical value Th_high, and brightness is greater than or equal to a predetermined period of time for convergency value CV time,
Then judge finger to electronic installation executive chairman by action.
Fig. 6 and Fig. 7 depicts the schematic diagram for the touch that may be mistaken for long-press action.As shown in fig. 6, plural number sense
Survey image brightness be reduced below or equal to low-light level critical value Th_low after, do not converge to convergency value CV, but
Directly increase above or equal to high brightness critical value Th_high, it is thus possible to be a click action rather than long-press action.And
In Fig. 7 the brightness of plural sensing image be reduced below or equal to low-light level critical value Th_low after, convergency value can be converged to
CV, but do not increase above or equal to high brightness critical value Th_high.This situation be probably electronic installation be moved to it is dark
Place or covered in by other objects, be not a long-press action.
Fig. 8 depicts judges that a predetermined touch is moved according to different embodiments with the brightness variation tendency according to sensing image
Make the schematic diagram of state machine whether being performed.As shown in figure 8, electronic installation is likely to be at 4 kinds of states：Without touch-control state S_1
(such as electronic installation is statically placed on table or Bao Baonei), finger down state S_2 (such as in Fig. 3 t10 and t11 state), hand
Refer to and lift state S_3 (such as in Fig. 3 t12-t14 state) and touch acknowledgement state S_4.Electronic installation is not grasped
When making, it can be in without touch-control state S_1.And the brightness Br for the sensing image that the CIS in electronic installation is sensed
During less than or equal to low-light level critical value Th_low, finger down state S_2 can be changed into.If brightness increases under this state
Greater than or equal to high brightness critical value Th_high, then lift state S_3 into finger, if being otherwise returned to no touch-control state S_
1.And lift state S_3 in finger, if the brightness Br of sensing image converges to convergency value CV, confirm shape into touch
State S_4.If brightness Br is gradually as little as less than or equal to low-light level critical value Th_low again, finger down state S_2 is returned to.
And in touch acknowledgement state S_4, except foregoing brightness Br is reduced below or equal to low-light level critical value
Th_low, then it is further added by being determined whether there are greater than or equal to high brightness critical value Th_high outside touch, can also joins
Other factors are examined to judge being which kind of touch.For example, if only brightness Br is reduced below or faced equal to low-light level
Dividing value Th_low, then it is further added by the action (such as Fig. 6) greater than or equal to high brightness critical value Th_high, then judges that this is touched
Control action is a click action.If in a predetermined period of time, brightness Br is reduced below or equal to low-light level critical value Th_
Low, then it is further added by being higher than a double hit critical value (such as Fig. 4) to the number greater than or equal to high brightness critical value Th_high, then
Judge that this touch acts for a double hit.If brightness Br be reduced below or equal to low-light level critical value Th_low after, can first
The predetermined period of times of convergency value CV mono- (i.e. in the presence of an interval of convergence) are converged to, are then further added by greater than or equal to high brightness facing
Dividing value Th_high (such as Fig. 5), then judge that this touch acts for a long-press.
Fig. 9 depicts the block diagram of touch sensing system according to an embodiment of the invention.As shown in figure 9, touch detection
System 900 includes：One CIS 901, one convergence module 903, a control unit 905, a counter 907, a long-press mould
909, one double hit module 911 of group and a directionkeys module 913.CIS 901 is capturing plural sensing image.Convergence
Module 903 is to the brightness adjustment of sensing image that captures CIS 901 into foregoing convergency value CV.Many methods can
To adjust the brightness of sensing image, for example, the yield value of the image signal of adjustment sensing image.Control unit 905 is used
To control the action of each element.Counter 907 to according to critical value Th (comprising high brightness critical value Th_high and low bright
Degree critical value Th_low) brightness of sensing image is calculated greater than or equal to high brightness critical value Th_high and be less than or wait
In low-light level critical value Th_low number.Long-press module 909, double hit module 911 and directionkeys module 913 then respectively to
Perform foregoing long-press judgement action, double hit judgement action and directionkeys click action.
So please note that, convergence module 903, long-press module 909, double hit module 911 and directionkeys module 913 can be with softwares
Mode realize, can be integrated into control unit 905.In addition, counter 907 can also be integrated into control unit 905.Therefore, root
According to the present invention touch sensing system can show for：A kind of touch sensing system, comprising：One CIS (such as in Fig. 9
CIS 901), to capture plural sensing image；And a control unit (such as control unit 905 in Fig. 9), use
Acted with the brightness variation tendency according to sensing image to judge whether an object performs a predetermined touch to electronic installation.
According to previous embodiment, touch can be judged according to sensing image, therefore can avoided in known techniques,
Using capacitance-type touch-control screen or hardware button come as control interface the problem of.
Further, since the present invention carries out touch-control judgement using optics mechanism, therefore electronic installation is real using the present invention
When applying the framework of example click on detecting, and without housing traditional keys or buttons in the body perforate of electronic installation,
It so can also reduce dust or the function of clicking on is penetrated into and influenceed to aqueous vapor.
The foregoing is only the preferred embodiments of the invention, all equivalent changes done according to scope of the present invention patent with
Modification, it should all belong to the covering scope of the present invention.
Claims (18)
- A kind of 1. touch detection method, it is characterised in that use on the electronic installation comprising a CIS, comprising：(a) plural sensing image is captured with the CIS；And(b) judge it is predetermined tactile whether an object performs one to the electronic installation according to the brightness variation tendency of those sensing images Control acts.
- 2. touch detection method as claimed in claim 1, it is characterised in that wherein predetermined touch action is a directionkeys point Hit action.
- 3. touch detection method as claimed in claim 2, it is characterised in that wherein the step (b) is with those sensing image institutes The brightness change direction of presentation judges directionkeys that the object is clicked on.
- 4. touch detection method as claimed in claim 1, it is characterised in that wherein predetermined touch action is moved for a double hit Make.
- 5. touch detection method as claimed in claim 4, it is characterised in that if the brightness change of wherein those sensing images becomes Gesture is：In a predetermined period of time, the number for increasing to a high brightness critical value and being reduced to a low-light level critical value is high In or equal to a double hit critical value, then the step (b) judges predetermined touch action for double hit action.
- 6. touch detection method as claimed in claim 1, it is characterised in that wherein predetermined touch action is pressed for a length Make.
- 7. touch detection method as claimed in claim 6, it is characterised in that if the brightness change of wherein those sensing images becomes Gesture is：It is reduced below or equal to the convergency value is converged to after the low-light level critical value, then increases to be equal to or higher than again and be somebody's turn to do High brightness critical value, and be greater than or equal to a predetermined period of time equal to the time of the convergency value, then the step (b) judges the thing Part performs long-press action to the electronic installation.
- 8. touch detection method as claimed in claim 1, it is characterised in that wherein the touch detection method is implemented in a touch-control On screen.
- 9. touch detection method as claimed in claim 1, it is characterised in that wherein the touch detection method is implemented in an optics On Trackpad.
- 10. a kind of touch sensing system, it is characterised in that include：One CIS, to capture plural sensing image；AndOne control unit, judge the object whether to a control interface to the brightness variation tendency according to those sensing images Perform predetermined touch action.
- 11. touch sensing system as claimed in claim 10, it is characterised in that wherein predetermined touch action is a directionkeys Click action.
- 12. touch sensing system as claimed in claim 11, it is characterised in that wherein the control unit is with those sensing images The brightness change direction presented judges directionkeys that the object is clicked on.
- 13. touch sensing system as claimed in claim 10, it is characterised in that wherein predetermined touch action is moved for a double hit Make.
- 14. touch sensing system as claimed in claim 13, it is characterised in that if the wherein brightness change of those sensing images Trend is：In a predetermined period of time, increase to a high brightness critical value and be reduced to the number of a low-light level critical value Greater than or equal to a double hit critical value, then the control unit judges predetermined touch action for double hit action.
- 15. touch sensing system as claimed in claim 10, it is characterised in that wherein predetermined touch action is pressed for a length Make.
- 16. touch sensing system as claimed in claim 15, it is characterised in that if the wherein brightness change of those sensing images Trend is：It is reduced below or equal to the convergency value is converged to after the low-light level critical value, then increases to and be equal to or higher than again The high brightness critical value, and be greater than or equal to a predetermined period of time equal to the time of the convergency value, then the control unit judges The object performs long-press action to the electronic installation.
- 17. touch sensing system as claimed in claim 10, it is characterised in that wherein the control interface is a touch control screen.
- 18. touch sensing system as claimed in claim 10, it is characterised in that wherein the control interface is an optical touch board On.
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| CN201610331621.7A CN107402654B (en) | 2016-05-18 | 2016-05-18 | Touch detection method and touch detection system |
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| CN107402654B (en) | 2021-07-16 |
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