CN103809782B - touch position compensation method and device - Google Patents
touch position compensation method and device Download PDFInfo
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- CN103809782B CN103809782B CN201210436400.8A CN201210436400A CN103809782B CN 103809782 B CN103809782 B CN 103809782B CN 201210436400 A CN201210436400 A CN 201210436400A CN 103809782 B CN103809782 B CN 103809782B
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Abstract
The present invention relates to touch position compensation method and device, it is adaptable to there is Touch Screen and the electronic installation of multiple position sensor.Described method is the eye position utilizing position sensor detection user eyes relative to Touch Screen, and obtain the article position of object shown by Touch Screen, and according to eye position and article position, calculate the visual angle of eyes viewing object, and according to visual angle and the thickness of Touch Screen, calculate the parallax of eyes viewing object.Finally, the touch position of object shown by parallax compensation user finger touching Touch Screen is used.The present invention, by detecting user eyes relative to the relative position showing object on screen, calculates user according to this and watches the parallax of each object, and be adjusted touch position detected by Touch Screen, can compensate for the touch position deviation caused because of parallax.Additionally, the present invention herein in connection with Touch Screen three dimensions detect and user finger size detection, can improve touch position compensate accuracy.
Description
Technical field
The present invention relates to a kind of touch position detection method and device, and particularly to one detection eye position to compensate
The method and device of touch position.
Background technology
The mode of operation of Touch Screen has simply compared to traditional keyboard entry method, the advantage of intuition, hands the most now
The consumption electronic products, even notebook computer, desktop computer and various household electric such as machine, personal digital assistant, panel computer
Device, all has and utilizes Touch Screen to replace conventional keyboard with the trend as inputting interface.
In traditional keyboard entry method, user must compare the picture of display on screen and press keyboard, ability
Smoothly complete the operating functions such as word input or menu switching.And if use Touch Screen mode of operation, then user only needs
Click with pointer or directly press with finger, getting final product the various functions of easy operation electronic installation.As can be seen here, touch screen
A kind of more convenient input mode of curtain.
But, owing to the contact panel of Touch Screen has certain thickness, along with user watches posture, the difference of angle, its
Eyes viewing can produce parallax when showing the object under contact panel.This parallax will cause user touching object with finger
Time, there is between touch position and the display position of object of finger drop, and this parallax can be along with the increase of Touch Screen size
And it is the most obvious.
For example, Fig. 1 (a) and Fig. 1 (b) is the parallax schematic diagram of user viewing screen.Please also refer to Fig. 1 (a), when making
When user watches, with the distance of 15, the mobile phone that screen size is 3.5 (wide by 2.9, high 2), its eyes are from just to screen
When viewing screen edge is transferred in the direction of curtain central authorities, have the visual angle of 3.8 degree (short transverses) to 5.5 degree (widths)
(viewing angle) difference.And watching screen size when user with the distance of 20 is 27 (wide by 23.5, height
13.2), during one-body molded (all-in-one, AIO) computer, its eyes are from just to the direction of center Screen then viewing
During screen edge, then can produce the visual angle of up to 30.4 degree (widths).It follows that the visual angle of user viewing screen
Can increase along with the increase of screen size, thus increase the parallax of object under user viewing screen, result makes touching of finger
Touch and have very big drop between the display position of position and object, in turn result in the faulty operation of electronic installation.
Summary of the invention
In view of this, the present invention proposes a kind of touch position compensation method and device, can compensate for the touch position caused because of parallax
Deviation.
The present invention proposes a kind of touch position compensation method, it is adaptable to have Touch Screen and the electronic installation of multiple position sensor.
Described method is the eyes the utilizing position sensor detection user eye positions relative to Touch Screen, and obtains Touch Screen
The article position of shown object, and according to eye position and article position, calculate eyes and watch the visual angle of this object, and
According to visual angle and the thickness of Touch Screen, calculate the parallax of eyes viewing object.Finally, then the hands of parallax compensation user is used
Refer to the touch position of touching object shown by Touch Screen.
The present invention separately proposes a kind of touch position compensation device, and it includes eye position detection module, disparity computation module, position
Compensating module.Wherein, eye position detection module is to utilize multiple position sensor detection user eyes relative to Touch Screen
Eye position.Disparity computation module is to obtain the article position of the object shown by Touch Screen, and according to eye position
And article position, calculate the visual angle of eyes viewing object, and according to visual angle and the thickness of Touch Screen, calculate eyes viewing thing
The parallax of part.Position compensation module is used to the touching of the object using the touching of parallax compensation user finger shown by Touch Screen
Position.
Based on above-mentioned, the touch position compensation method of the present invention and device are to show relative on screen by detection user eyes
The relative position of object, calculates user according to this and watches the parallax of each object, and in order to the touching detected by Touch Screen
Position is adjusted, and can compensate for the touch position deviation caused because of parallax.
Additionally, the present invention herein in connection with Touch Screen three dimensions detect and user finger size detection, can improve touching position
Put the accuracy of compensation.
Accompanying drawing explanation
Fig. 1 (a) is the parallax schematic diagram of user viewing screen；
Fig. 1 (b) is also the parallax schematic diagram of user viewing screen；
Fig. 2 is the schematic diagram of finger touching screen display object in one embodiment of the invention.
Fig. 3 is touch position compensation device block chart in one embodiment of the invention.
Fig. 4 is touch position compensation method flow chart in one embodiment of the invention institute.
Fig. 5 is according to the block chart of eye position detection module in one embodiment of the invention.
Fig. 6 is the example detecting eye position in one embodiment of the invention.
Wherein: 22: finger 24: Touch Screen 242: contact panel 244: display floater
244a～244f: object 30: compensation device 31: eye position detection module
312: the first induction module 314: the second induction modules 316: position computation module
32: article position acquirement module 33: visual angle computing module 34: disparity computation module
35: position compensation module S402～S410: step
Detailed description of the invention
For the features described above of the present invention and advantage can be become apparent, special embodiment below, and coordinate institute's accompanying drawing to make specifically
Bright as follows.
The present invention is to combine image sensor (image sensor), the proximity induction device (proximity configured on the electronic device
Etc. sensor) during position sensor detection user viewing screen, the relative position between its eyes with screen display object, enter
And calculate user and watch the parallax of this object, and compensate the touch position deviation caused because of this parallax.Touch by above-mentioned
Touching position compensation, the present invention can pick out the object that user to be operated more accurately, and user operates the dynamic of this object
Make.
Fig. 2 is according to the schematic diagram of finger touching screen display object in one embodiment of the invention.Refer to Fig. 2, the present embodiment
Illustrate user in the way of finger 22 operates Touch Screen 24, this Touch Screen 24 can divide into contact panel 242 and display
Panel 244, wherein contact panel 242 has a thickness Ti, display floater 244 the most such as shows object 244a～244f.
When assuming user viewing Touch Screen 24, its eyes 26 are the most just to object 244b.Now, if user is with finger 22
Touching object 244b, then due to eyes 26 watch the sight line of object 244b just fall on contact panel 242 with object 244b
On corresponding touch area, therefore user will not produce the feelings of touch position deviation when touching object 244b because of parallax
Shape.But, if user is to touch object 244f with finger 22, then watch the sight line of object 244f with tactile due to eyes 26
The normal vector of control screen 24 has a view angle thetaf, and do not fall within touching district corresponding with object 244f on contact panel 242
On territory, therefore user will produce the situation of touch position deviation when touching object 244f because of parallax.
In detail, corresponding to the thickness Ti of contact panel 242, the position of user finger 22 practical touch to contact panel 242
Put, between pt and object 244f center position pf, there is parallax Df.Wherein, the thickness Ti of contact panel 242 is multiplied by regards
The tangent value of angle θ f, can obtain parallax Df, and its relational expression is as follows:
Df=Ti×tanθf
Based on the relation between above-mentioned eyes visual angle and touch position, the present invention proposes a kind of touch position compensation method and device,
It can calculate the visual angle of each object of display on user eyes viewing Touch Screen, thus compensate user and touch each object
Time the touch position deviation that produced because of parallax.Hereinafter the most separately describe in detail for embodiment.
Fig. 3 is according to touch position compensation device block chart in one embodiment of the invention.Refer to Fig. 3, the compensation of the present embodiment
Device 30 is such as arranged in the tools such as mobile phone, personal digital assistant, panel computer, notebook computer, desktop computer, household electrical appliance
In the electronic installation of standby Touch Screen, or be directly incorporated in Touch Screen, and can auxiliary electronic device detection user for
The operation of Touch Screen, and its touch position on Touch Screen of adequate compensation.
Compensation device 30 includes that eye position detection module 31, article position obtain module 32, visual angle computing module 33, parallax
Computing module 34 and position compensation module 35, these modules are e.g. with the hardware unit of logic circuit component composition, and can hold
The compensation function of row touch position；These modules can also be previously stored the program in electronic installation, and it can be loaded into electronic installation
Processor, and perform the compensation function of touch position, do not limit at this.
Fig. 4 is touch position compensation method flow chart in one embodiment of the invention.Refer to Fig. 4, the method for the present embodiment is suitable for
Each item in the compensation device 30 of above-mentioned Fig. 3, the most i.e. collocation compensation device 30, illustrates the detailed of present implementation
Step:
First, eye position detection module 31 the eyes eye position (step relative to Touch Screen of user is detected
S402).Wherein, eye position detection module 31 such as can utilize plural position sensor to detect the eyes of user,
And extrapolate the user eyes position relative to Touch Screen.Above-mentioned position sensor e.g. proximity induction device, electric charge coupling
Close element (Charge Coupled Device, CCD) induction apparatus or complementary metal oxide semiconductors (CMOS) (Complementary
Metal-Oxide Semiconductor, CMOS) induction apparatus, do not limit at this.
In detail, the block chart of eye position detection module during Fig. 5 is one embodiment of the invention.Refer to Fig. 5, eye position
Detection module 31 can be sub-divided into the first induction module the 312, second induction module 314 and position computation module 316.Wherein,
First induction module 312 be utilize primary importance induction apparatus detection user eyes and primary importance induction apparatus between first away from
From, first elevation angle and eyes projected position on Touch Screen relative to the first relative direction of primary importance sensor location；
Second induction module 314 then can utilize the second position induction apparatus detection user eyes and second position induction apparatus between second away from
From, second elevation angle and eyes projected position on Touch Screen relative to the second relative direction of second position sensor location.
According to above-mentioned detection data, position computation module 316 i.e. may utilize first distance and first elevation angle, or utilize second away from
From and second elevation angle, calculate the vertical dimension between eyes and Touch Screen further.Position computation module 316 separately may utilize
Allocation position on Touch Screen of primary importance induction apparatus and second position induction apparatus and above-mentioned the first relative direction and second
Relative direction, calculates eyes projected position on Touch Screen.Additionally, position computation module 316 is also with above-mentioned throwing
Shadow position and vertical dimension, calculate eyes relative to Touch Screen eye position.
For example, the example of eye position is detected during Fig. 6 is one embodiment of the invention.Refer to Fig. 6, present embodiment assumes that
Primary importance induction apparatus and the second position induction apparatus of electronic installation lay respectively at position S1 and S2, and the eyes of user are then positioned at
Position E.Wherein, primary importance induction apparatus can detect that user eyes and distance d1 between it, angle of elevation alpha 1 and eyes
Projected position P on Touch Screen is relative to the relative direction of primary importance sensor location S1Second position induction apparatus
Can detect that user eyes and distance d2 between it, angle of elevation alpha 2 and the eyes projected position P on Touch Screen are relative
Relative direction in second position sensor location S2
Wherein, utilize distance d1 and angle of elevation alpha 1, or second distance d2 and the second angle of elevation alpha 2, and eyes and Touch Screen
Between vertical dimension d3 between geometrical relationship, vertical dimension d3 can be extrapolated.And recycle primary importance induction apparatus position
Put S1 and second position sensor location S2 and above-mentioned relative directionAndThen can calculate eyes at Touch Screen
On projected position P.Finally, utilize projected position P and vertical dimension d3, the eyes position relative to Touch Screen can be obtained
Put.
After acquirement eyes are relative to the position of Touch Screen, then obtained Touch Screen by article position acquirement module 32 and shown
The article position (step S404) of the object shown.Wherein, article position acquirement module 32 such as can be from the operation of electronic installation
The application program that system or electronic installation currently perform obtains the picture being currently displayed on Touch Screen, and therefrom obtains
The position of the object such as form, diagram, option, button in picture.
After obtaining the position of eyes and object, visual angle computing module 33 can calculate the visual angle of user eyes viewing object
(step S406).As a example by Fig. 2, visual angle computing module 33, according to the position of eyes 26 with object 244f, can calculate
Go out view angle theta f of user eyes 26 viewing and object 244f.
Then, disparity computation module 34 can calculate the viewing of user eyes touch according to above-mentioned visual angle and the thickness of Touch Screen
The parallax (step S408) of control screen display object.Equally as a example by Fig. 2, utilize the thickness Ti of view angle theta f and Touch Screen,
User eyes 22 can be calculated and watch the parallax Df of object 244f.
Finally, position compensation module 35 can use above-mentioned parallax to compensate the object shown by user finger touching Touch Screen
Touch position (step S410).Wherein, position compensation module 35 such as can first detect the reality of finger touching Touch Screen
Position, and calculate the above-mentioned article position relative direction relative to eyes projected position on Touch Screen, the most again by finger
The physical location of touching moves one section of distance being equal to parallax towards this relative direction, and touches as finger with the position after movement
The touch position of object shown by Touch Screen.As a example by Fig. 2, position compensation module 35 is i.e. towards thing by touch position pt
Part 244f center position pf moves one section of distance being equal to parallax Df, thus compensates original touch position pt for position
Put pf.Thereby, what user i.e. can be correct chooses object 244f, and operates.
By said method, compensation device 30 can calculate the parallax of user eyes viewing screen display object, adequately compensates for
User finger touches the touch position of this object, thus picks out user more accurately and operate the action of this object.Compensate dress
Put 30 and such as can set up the corresponding table of a parallax for all objects of display on Touch Screen according to said method, thereby can be
During user touching Touch Screen, directly find out the parallax of correspondence and carry out the compensation of touch position, improving the efficiency compensated.
It should be noted that, utilizing position sensor in addition to the position detecting user eyes except above-mentioned, the present invention also can be further
Utilize the induction apparatuss such as gravity sensor, electronic compass and gyroscope to measure Touch Screen position in three dimensions, thus auxiliary
Help posture and the angle judging user viewing Touch Screen, improve the accuracy that touch position compensates.
For example, such as may also include the 3rd position sensor in above-mentioned eye position detection module 31, it such as can
Utilize the sensings such as gravity sensor that an induction apparatus hub (sensor hub) contacts above-mentioned, electronic compass, gyroscope
Device, uses detection Touch Screen normal vector in three dimensions.Position computation module 316 is made to may utilize above-mentioned projection position
Put, vertical dimension and normal vector, calculate user eyes in three dimensions relative to the eye position of Touch Screen.
On the other hand, owing to the size of user finger also influences whether its touch position on Touch Screen, when finger is thicker
Time, because touch position deviation produced by parallax can become apparent from during its touching Touch Screen.To this, present invention inspection the most further
The finger size of survey user, and calculate deviation (tolerance) value of above-mentioned parallax according to this, thus improve touch position and compensate
Accuracy.
In detail, in one embodiment, compensation device may also include finger size detection module (not shown), and it such as can root
According to finger ratio in the image that position sensor is extracted, or multiple touch points produced by finger touching Touch Screen
Distribution, thus judge the size of finger.And after obtaining finger size, finger size detection module can calculate the deviation of parallax
Value, and this deviation value is added in the computing formula of above-mentioned parallax so that the parallax finally calculated more meets the touching of user finger
Truth.The relational expression of revised parallax Di and view angle theta f, the thickness Ti of contact panel 242 and deviation value To is such as
Under:
Di=Ti×tanθi±To
In sum, when the touch position compensation method of the present invention and device are by detection user viewing Touch Screen, its eyes
With the relative position between screen display object, calculate user according to this and watch the parallax of each object, and in order to revise touch screen
The touch position that curtain detects, and can compensate for the touch position deviation caused because of parallax.Additionally, the present invention is herein in connection with touch screen
The three dimensions detection of curtain and the detection of user finger size, can improve the accuracy that touch position compensates.
Although the present invention is open the most as above with embodiment, so it is not limited to the present invention, any those skilled in the art,
Without departing from the spirit and scope of the present invention, when making a little change and retouching, therefore protection scope of the present invention is with claim
Book is in the range of standard.
Claims (14)
1. a touch position compensation method, it is adaptable to have an electronic installation of a Touch Screen and multiple position sensor, should
Method comprises the following steps:
Described position sensor is utilized to detect an eyes eye position relative to this Touch Screen of a user；
Obtain an article position of an object shown by this Touch Screen；
According to this eye position and this article position, calculate these eyes and watch a visual angle of this object；
According to this visual angle and a thickness of this Touch Screen, calculate these eyes and watch a parallax of this object；And
The finger using this this user of parallax compensation touches a touch position of this object shown by this Touch Screen.
2. touch position compensation method as claimed in claim 1, it is characterised in that utilize described position sensor to detect this and make
These eyes of user include relative to the step of this eye position of this Touch Screen:
Utilize a primary importance induction apparatus detect between these eyes of this user and this primary importance induction apparatus one first distance,
One first elevation angle and this eyes projected position on this Touch Screen is relative to the one first of this primary importance sensor location
Relative direction；
Utilize a second position induction apparatus detect the second distance between these eyes of this user and this second position induction apparatus,
One second elevation angle and this eyes this projected position on this Touch Screen is relative to the one second of this second position sensor location
Relative direction；
Utilize this first distance and this first elevation angle or this second distance and this second elevation angle, calculate these eyes and this Touch Screen it
Between a vertical dimension；
Utilize this primary importance induction apparatus and this second position induction apparatus allocation position on this Touch Screen and this first phase
To direction and this second relative direction, calculate these eyes this projected position on this Touch Screen；And
Utilize this projected position and this vertical dimension, obtain these eyes this eye position relative to this Touch Screen.
3. touch position compensation method as claimed in claim 2, it is characterised in that use being somebody's turn to do of this this user of parallax compensation
The step of this touch position that finger touches this object shown by this Touch Screen includes:
Detect this finger and touch a physical location of this Touch Screen；
Calculate this article position third phase relative to these eyes this projected position on this Touch Screen to direction；And
This parallax is moved towards this third phase in direction by this physical location, touches this thing shown by this Touch Screen as this finger
This touch position of part.
4. touch position compensation method as claimed in claim 2, it is characterised in that utilize described position sensor to detect this and make
These eyes of user also include relative to the step of this eye position of this Touch Screen:
At least one the 3rd induction apparatus is utilized to detect this Touch Screen normal vector in a three dimensions；And
Utilize this projected position, this vertical dimension and this normal vector, calculate these eyes in this three dimensions relative to this touch screen
This eye position of curtain.
5. touch position compensation method as claimed in claim 1, it is characterised in that according to this visual angle and this Touch Screen should
Thickness, the step calculating this parallax that these eyes watch this object includes:
This thickness is multiplied by a tangent value at this visual angle, as this parallax.
6. touch position compensation method as claimed in claim 1, also includes:
Detect a size of this finger of this user.
7. touch position compensation method as claimed in claim 6, it is characterised in that according to this visual angle and this Touch Screen should
Thickness, the step calculating this parallax that these eyes watch this object also includes:
According to this size of this finger being detected this user, calculate a deviation value of this parallax.
8. touch position compensation method as claimed in claim 6, it is characterised in that detect this chi of this finger of this user
Very little step includes:
Touch this Touch Screen produced according to this finger ratio in the image that described position sensor is extracted or this finger
The distribution of raw multiple touch points, it is judged that this size of this finger.
9. a touch position compensation device, including:
One eyes position detecting module, utilizes multiple position sensor to detect eyes of a user relative to a Touch Screen
One eye position；
One article position obtains module, obtains an article position of an object shown by this Touch Screen；
One visual angle computing module, according to this eye position and this article position, calculates these eyes and watches a visual angle of this object；
One disparity computation module, according to this visual angle and a thickness of this Touch Screen, calculates these eyes and watches a parallax of this object；
And
One position compensation module, uses a finger of this this user of parallax compensation to touch this object shown by this Touch Screen
One touch position.
10. touch position compensation device as claimed in claim 9, it is characterised in that this eye position detection module includes:
One first induction module, utilize a primary importance induction apparatus detect these eyes of this user and this primary importance induction apparatus it
Between one first distance, one first elevation angle and this eyes projected position on this Touch Screen be relative to this primary importance sense
Answer one first relative direction of device position；
One second induction module, utilize a second position induction apparatus detect these eyes of this user and this second position induction apparatus it
Between a second distance, one second elevation angle and this eyes this projected position on this Touch Screen relative to this second position sense
Answer one second relative direction of device position；And
One position computation module, utilizes this first distance and this first elevation angle or this second distance and this second elevation angle, calculates this eye
A vertical dimension between eyeball and this Touch Screen, utilizes this primary importance induction apparatus and this second position induction apparatus at this touch screen
An allocation position on curtain and this first relative direction and this second relative direction, calculate these eyes on this Touch Screen should
Projected position, and utilize this projected position and this vertical dimension, obtain these eyes this eye position relative to this Touch Screen.
11. touch position compensation devices as claimed in claim 10, it is characterised in that this position compensation module includes that detection should
Finger touches a physical location of this Touch Screen, calculates this article position relative to this projection on this Touch Screen of these eyes
One third phase of position is to direction, and to direction, this physical location is moved this parallax towards this third phase, touches as this finger
This touch position of this object shown by this Touch Screen.
12. touch position compensation devices as claimed in claim 10, it is characterised in that this eye position detection module also includes:
One the 3rd position sensor, utilizes at least one the 3rd induction apparatus to detect this Touch Screen normal vector in a three dimensions,
Wherein this position computation module utilizes this projected position, this vertical dimension and this normal vector, calculates these eyes in this three dimensions
This eye position relative to this Touch Screen.
13. touch position compensation devices as claimed in claim 9, it is characterised in that this disparity computation module includes this thickness
Degree is multiplied by a tangent value at this visual angle, as this parallax.
14. touch position compensation devices as claimed in claim 9, it is characterised in that also include:
One finger size detection module, detects a size of this finger of this user；Wherein this disparity computation module also includes root
Detected this size of this finger of this user according to this finger size detection module, calculated a deviation value of this parallax.
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| CN201210436400.8A CN103809782B (en) | 2012-11-05 | 2012-11-05 | touch position compensation method and device |
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| CN201210436400.8A CN103809782B (en) | 2012-11-05 | 2012-11-05 | touch position compensation method and device |
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| CN103809782B true CN103809782B (en) | 2016-11-23 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104298412A (en) * | 2014-11-10 | 2015-01-21 | 上海摩软通讯技术有限公司 | Mobile terminal and operation calibrating method for touch screen of mobile terminal |
| CN108845713B (en) * | 2018-07-31 | 2021-08-31 | 广东美的制冷设备有限公司 | Display device, touch control method thereof, and computer-readable storage medium |
| CN109683775B (en) * | 2018-12-12 | 2021-07-06 | 歌尔科技有限公司 | Projection-based interaction method, projection equipment and storage medium |
| CN109766007B (en) * | 2019-01-03 | 2022-05-27 | 京东方科技集团股份有限公司 | Method and device for compensating fixation point of display equipment and display equipment |
| CN116400831B (en) * | 2023-06-08 | 2023-08-18 | 深圳市上融科技有限公司 | Handwriting pressure induction compensation algorithm of passive electromagnetic touch screen |
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| JPH11353118A (en) * | 1998-06-08 | 1999-12-24 | Ntt Data Corp | Information input device |
| CN102184057A (en) * | 2010-04-29 | 2011-09-14 | 友达光电股份有限公司 | Touch detection device and method for detecting touch position |
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