CN107943340B - Touch screen scanning detection method and device - Google Patents
Touch screen scanning detection method and device Download PDFInfo
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- CN107943340B CN107943340B CN201711086760.9A CN201711086760A CN107943340B CN 107943340 B CN107943340 B CN 107943340B CN 201711086760 A CN201711086760 A CN 201711086760A CN 107943340 B CN107943340 B CN 107943340B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- 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
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
Abstract
The invention relates to an infrared scanning technology, and provides a touch screen scanning detection method and device, which are used for improving the identification precision of touch points. The method comprises the following steps: the method comprises the steps of scanning a touch screen based on one scanning direction of a long-side scanning direction to obtain a first touch area number, scanning the touch screen based on one scanning direction of a short-side scanning direction to obtain a second touch area number, comparing the first touch area number with the second touch area number, adjusting the number of preset initial long-side scanning direction and initial short-side scanning direction according to a comparison result to obtain a target long-side scanning direction and a target short-side scanning direction, and scanning and detecting the touch screen according to the target long-side scanning direction and the target short-side scanning direction. In this way, in each scanning period, the frame with high discrimination is selected from the long side and the short side to set more scanning directions so as to obtain more touch areas, thereby further improving the identification precision of the touch points.
Description
Technical Field
The invention relates to an infrared scanning technology, in particular to a touch screen scanning detection method and device.
Background
With the popularization of intelligent electronic equipment, electronic touch screens are widely applied. In order to accurately identify the touch point of the user to perform the corresponding operation, the electronic device generally needs to scan and detect the touch screen. Currently, the existing scanning detection schemes are classified into, but not limited to, the following:
the first scheme is as follows: and (6) global scanning.
And setting scanning periods, and respectively scanning once through each infrared tube arranged on the touch screen frame in each scanning period.
For example, referring to fig. 1, infrared pair transistors are generally disposed on a frame of a touch screen, and a group of infrared pair transistors includes a transmitting tube and a receiving tube, the frame on which the transmitting tube is disposed is referred to as a transmitting side, and the frame on which the receiving tube is disposed is referred to as a receiving side, wherein, since the touch screen is generally rectangular, the transmitting side with a relatively long length is referred to as a long side, and the transmitting side with a relatively short length is referred to as a short side.
In the scanning process, the transmitting side (long side and short side) transmits infrared rays to the opposite receiving side for scanning, and the scanning direction is preset, and can be scanning in the horizontal direction and the vertical direction, or scanning in the direction of a preset slope.
Alternatively, two scanning directions in the long-side scanning are shown in fig. 2A and 2B, and two scanning directions in the short-side scanning are shown in fig. 3A and 3B.
However, the first solution has the following drawbacks: because the number of infrared pair tubes is very large, the scanning time is long, and the response speed to touch is slow.
The second scheme is as follows: the scan is tracked.
Before the touch point is identified, the scanning mode is the same as the global scanning mode; when the touch point is recognized, touch point tracking scanning is started. That is, the y-axis scans only a few nearby infrared tubes centered on the y-coordinate of the touch point, and the z-axis scans only a few nearby infrared tubes centered on the x-coordinate of the touch point.
In addition, each infrared pair transistor needs to be divided into m segments in advance, wherein m is an integer greater than or equal to 2. In addition to tracking scanning, in each scanning period, a section of infrared tube is selected for scanning, so that the condition that a new touch point falls in can be timely detected.
In practical applications, each light path emitted by a particular emission tube has a different angle, so that each angle of n light paths emitted by one emission tube is referred to as a scanning direction. Therefore, in the 1-to-n scanning mode, one emission tube corresponds to n scanning directions, and each scanning direction is composed of a set of parallel light paths with the same slope. For example, two scanning directions corresponding to the long-side scanning are shown in fig. 2A and 2B, and two scanning directions corresponding to the short-side scanning are shown in fig. 3A and 3B.
However, in the prior art, no matter where the touch point is located, the touch point is scanned according to the preset scanning direction, and whether the setting mode of the scanning direction is reasonable or not is not considered, which easily causes missed detection of the touch point.
For example, referring to fig. 4A and 4B, assume that the preset scan direction is: direction 1 (i.e., vertical direction), direction 2 (i.e., horizontal direction), direction 3, and direction 4, where direction 1 and direction 3 are long-side scans and direction 2 and direction 4 are short-side scans.
If a touch occurs in each scanning direction, a touch area may be divided. The touch area refers to a group of parallel scanning optical paths corresponding to a specific scanning direction, when a touch occurs, each touch point will block several consecutive optical paths in the parallel optical paths, which are called as a touch area in the scanning direction, where the first blocked optical path is a starting boundary of the touch area, and the last blocked optical path is an ending boundary (the sequence can be customized).
For example, as shown in fig. 4A, after scanning detection is performed according to a preset scanning direction, 4 touch areas can be obtained in the direction 1, 1 touch area can be obtained in the direction 2, 4 touch areas can be obtained in the direction 3, and 1 touch area can be obtained in the direction 4, where there are overlapping areas between the touch areas, and finally 4 overlapping areas can be obtained.
As shown in fig. 4B, by performing recognition in the 4 overlapping areas, 4 touch points can be recognized.
However, in a multi-touch-point scene, the positions of some touch points are relatively close, and if a plurality of touch points are located in the same touch area, the touch points cannot be effectively distinguished by adopting the existing scanning method.
For example, as shown in fig. 4A, the area of the rightmost overlapping area in the multiple overlapping areas is sufficient to cover two or more touch points, and then, as shown in fig. 4C, if two touch points with close positions exist in the rightmost overlapping area, the touch points cannot be accurately identified by using the prior art, and only the identification result shown in fig. 4B can be obtained.
Obviously, in the above example, the long-side scanning can obtain more touch areas, and therefore, the long-side scanning can more accurately detect the specific position of the touch point than the short-side scanning.
However, since the preset scanning direction is fixed, long scanning can be performed only according to the direction 1 and the direction 3, and short scanning is performed according to the direction 2 and the direction 4, which is not in accordance with the specific characteristics of the application scenario, and may cause missed detection of the touch point.
In view of the above, a new method for scanning and detecting a touch screen is needed to overcome the above-mentioned drawbacks.
Disclosure of Invention
The embodiment of the invention provides a touch screen scanning detection method and device, which are used for improving the identification precision of touch points.
The embodiment of the invention provides the following specific technical scheme:
a touch screen scanning detection method comprises the following steps:
scanning the touch screen based on one scanning direction of the long-edge scanning direction to obtain a corresponding first touch area number, and scanning the touch screen based on one scanning direction of the short-edge scanning direction to obtain a corresponding second touch area number, wherein the touch area is an area formed by continuous light paths shielded by touch points in one scanning direction;
comparing the number of the first touch areas with the number of the second touch areas, and adjusting the number of the preset initial long-edge scanning direction and the number of the preset initial short-edge scanning direction according to the comparison result to obtain a target long-edge scanning direction and a target short-edge scanning direction;
and scanning and detecting the touch screen according to the long-edge scanning direction and the short-edge scanning direction of the target.
Optionally, one of the long-side scanning directions is a vertical direction;
one of the short side scanning directions is a horizontal direction.
Optionally, the comparing the number of the first touch areas with the number of the second touch areas, and adjusting the number of the preset initial long side scanning direction and the preset initial short side scanning direction according to the comparison result includes:
determining a frame with higher distinguishing degree in the long side and the short side according to the comparison result, wherein the number of the touch areas is positively correlated with the distinguishing degree;
if the long edge region is higher in degree, adding a new long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction, and deleting the existing short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction;
if the short edge region is higher in degree, adding a new short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction, and deleting the existing long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction.
Optionally, the determining, according to the comparison result, a frame with a higher division degree in the long side and the short side includes:
if the number of the first touch areas is larger than that of the second touch areas and the difference value reaches a first set threshold value, determining that the degree of the long edge area is higher;
and if the number of the second touch areas is larger than that of the first touch areas and the difference value reaches a second set threshold value, determining that the short edge discrimination is higher.
Optionally, if the long edge discrimination is higher, then add a new long edge scanning direction in the initial long edge scanning direction, obtain a target long edge scanning direction, and delete an existing short edge scanning direction in the initial short edge scanning direction, obtain a target short edge scanning direction, including:
selecting L1 long-edge scanning directions from preset candidate long-edge scanning directions, and combining the long-edge scanning directions with the initial long-edge scanning direction to obtain a target long-edge scanning direction; deleting L1 short edge scanning directions from the preset initial short edge scanning direction to obtain a target short edge scanning direction, wherein L1 is a preset parameter;
if the short edge discrimination is higher, then add new short edge scanning direction in the initial short edge scanning direction, obtain target short edge scanning direction, and delete existing long edge scanning direction in the initial long edge scanning direction, obtain target long edge scanning direction, include:
selecting L2 short edge scanning directions from preset candidate short edge scanning directions, and combining the short edge scanning directions with the initial short edge scanning direction to obtain a target short edge scanning direction; and deleting L2 long side scanning directions from the preset initial long side scanning direction to obtain a target long side scanning direction, wherein L2 is a preset parameter.
Optionally, further comprising:
when L1 long-edge scanning directions are selected from preset candidate long-edge scanning directions, sorting each long-edge scanning direction in the candidate long-edge scanning directions according to the sequence of the gradient from large to small, and selecting the first L1 long-edge scanning directions; when deleting L1 short side scanning directions from the initial short side scanning directions, sequencing each short side scanning direction in the initial short side scanning directions according to the sequence of the slope from small to large, and deleting the front L2 short side scanning directions; alternatively, the first and second electrodes may be,
when L2 short side scanning directions are selected from preset candidate short side scanning directions, all the short side scanning directions in the candidate short side scanning directions are sequenced from large to small according to the slope, the front L2 short side scanning directions are selected, and when L2 long side scanning directions are deleted from the initial long side scanning directions, all the long side scanning directions in the initial long side scanning directions are sequenced from small to large according to the slope, and the front L2 long side scanning directions are deleted.
A touch screen scan detection apparatus, comprising:
the touch screen display device comprises a first scanning unit, a second scanning unit and a control unit, wherein the first scanning unit is used for scanning the touch screen based on one scanning direction of a long-edge scanning direction to obtain a corresponding first touch area number and scanning the touch screen based on one scanning direction of a short-edge scanning direction to obtain a corresponding second touch area number, and the touch area is an area formed by continuous light paths shielded by touch points in one scanning direction;
the adjusting unit is used for comparing the number of the first touch areas with the number of the second touch areas, and adjusting the number of the preset initial long-edge scanning direction and the number of the preset initial short-edge scanning direction according to the comparison result to obtain a target long-edge scanning direction and a target short-edge scanning direction;
and the second scanning unit is used for scanning and detecting the touch screen according to the target long side scanning direction and the target short side scanning direction.
Optionally, one of the long-side scanning directions adopted by the first scanning unit is a vertical direction;
one scanning direction of the short side scanning directions adopted by the first scanning unit is a horizontal direction.
Optionally, when comparing the number of the first touch areas with the number of the second touch areas, and adjusting the number of the preset initial long side scanning direction and the number of the preset initial short side scanning direction according to the comparison result, the adjusting unit is configured to:
determining a frame with higher distinguishing degree in the long side and the short side according to the comparison result, wherein the number of the touch areas is positively correlated with the distinguishing degree;
if the long edge region is higher in degree, adding a new long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction, and deleting the existing short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction;
if the short edge region is higher in degree, adding a new short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction, and deleting the existing long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction.
Optionally, when determining the border with the higher division degree in the long side and the short side according to the comparison result, the adjusting unit is configured to:
if the number of the first touch areas is larger than that of the second touch areas and the difference value reaches a first set threshold value, determining that the degree of the long edge area is higher;
and if the number of the second touch areas is larger than that of the first touch areas and the difference value reaches a second set threshold value, determining that the short edge discrimination is higher.
Optionally, if the long-edge region is higher in degree, a new long-edge scanning direction is added in the initial long-edge scanning direction to obtain a target long-edge scanning direction, and an existing short-edge scanning direction is deleted in the initial short-edge scanning direction, and when the target short-edge scanning direction is obtained, the adjusting unit is configured to:
selecting L1 long-edge scanning directions from preset candidate long-edge scanning directions, and combining the long-edge scanning directions with the initial long-edge scanning direction to obtain a target long-edge scanning direction; deleting L1 short edge scanning directions from the preset initial short edge scanning direction to obtain a target short edge scanning direction, wherein L1 is a preset parameter;
if the short edge discrimination is higher, a new short edge scanning direction is added in the initial short edge scanning direction to obtain a target short edge scanning direction, and the existing long edge scanning direction is deleted in the initial long edge scanning direction, and when the target long edge scanning direction is obtained, the adjusting unit is used for:
selecting L2 short edge scanning directions from preset candidate short edge scanning directions, and combining the short edge scanning directions with the initial short edge scanning direction to obtain a target short edge scanning direction; and deleting L2 long side scanning directions from the preset initial long side scanning direction to obtain a target long side scanning direction, wherein L2 is a preset parameter.
Optionally, the adjusting unit is further configured to:
when L1 long-edge scanning directions are selected from preset candidate long-edge scanning directions, sorting each long-edge scanning direction in the candidate long-edge scanning directions according to the sequence of the gradient from large to small, and selecting the first L1 long-edge scanning directions; when deleting L1 short side scanning directions from the initial short side scanning directions, sequencing each short side scanning direction in the initial short side scanning directions according to the sequence of the slope from small to large, and deleting the front L2 short side scanning directions; alternatively, the first and second electrodes may be,
when L2 short side scanning directions are selected from preset candidate short side scanning directions, all the short side scanning directions in the candidate short side scanning directions are sequenced from large to small according to the slope, the front L2 short side scanning directions are selected, and when L2 long side scanning directions are deleted from the initial long side scanning directions, all the long side scanning directions in the initial long side scanning directions are sequenced from small to large according to the slope, and the front L2 long side scanning directions are deleted.
The embodiment of the invention has the beneficial effects
In the embodiment of the invention, the touch screen is scanned based on one scanning direction of the long side scanning direction to obtain the number of first touch areas, the touch screen is scanned based on one scanning direction of the short side scanning direction to obtain the number of second touch areas, the number of the first touch areas and the number of the second touch areas are compared, the preset number of the initial long side scanning direction and the preset number of the initial short side scanning direction are adjusted according to the comparison result to obtain the target long side scanning direction and the target short side scanning direction, and the touch screen is scanned and detected according to the target long side scanning direction and the target short side scanning direction. Like this, in each scanning cycle, can be according to the real-time change of long limit discrimination and minor face discrimination, adjust long limit scanning direction and minor face scanning direction in a flexible way, can select the high frame of discrimination to set up more scanning directions in long limit and minor face promptly, in order to obtain more touch area, thereby effectively avoided the hourglass of touch point to examine, thereby improved the recognition accuracy of touch point, also improved the response speed of touch-sensitive screen, promoted user's use experience by a wide margin.
Drawings
FIG. 1 is a schematic diagram of a touch screen in an infrared scanning manner in the prior art;
FIGS. 2A and 2B are schematic diagrams of two scanning directions in long-side scanning in the prior art;
FIGS. 3A and 3B are schematic diagrams of two scanning directions in the case of short-side scanning in the prior art;
fig. 4A, 4B, and 4C are schematic diagrams illustrating a touch area obtained by scanning in a preset scanning direction and identifying a touch point in the prior art;
FIG. 5 is a schematic view of a scanning and detecting process of a touch screen according to an embodiment of the present invention;
fig. 6A, 6B, and 6C are schematic diagrams illustrating that the adjusted scanning direction is adopted for scanning to obtain a touch area and identify a touch point in the embodiment of the present invention;
fig. 7 is a functional structure diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to improve the identification accuracy of the touch points, in the embodiment of the invention, in each scanning period, the scanning direction in the current scanning period is adjusted according to the number of the touch areas obtained in the horizontal direction and the vertical direction, so that the multi-point discrimination in the current scanning direction is better, and the identification accuracy of the touch points is higher.
Preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 5, in the embodiment of the present invention, a specific process of scanning and detecting the touch screen is as follows:
step 500: and determining a preset initial long-side scanning direction and a preset initial short-side scanning direction.
In the embodiment of the present invention, it is assumed that the total number of the preset initial long side scanning directions is a1, and the number of the corresponding long sides is also preset with the candidate long side scanning directions, and is a2, and in the same way, it is assumed that the total number of the preset initial short side scanning directions is b1, and the corresponding short sides is also preset with the candidate short side scanning directions, and is b 2. The values of a1 and b1 can be the same or different, and the values of a2 and b2 can be the same or different.
In the present embodiment, for convenience of explanation, the initial values are set to: a1, b1, a2, b2 and 2.
On the other hand, in this embodiment, the long side refers to a frame capable of scanning in the vertical direction, and the short side refers to a frame capable of scanning in the horizontal direction, because in practical applications, most of the touch screens of the electronic devices applied in this technical solution are rectangles with horizontal plates. If there is an exception, that is, the touch screen of the electronic device to which the present technical solution is applied is a vertical rectangle, for convenience of description, a frame capable of scanning the vertical direction may be referred to as a long side, and a frame capable of scanning the horizontal direction may be referred to as a short side, which will not be described herein again.
Further, the long side scanning direction refers to directions of various angles that can be scanned through the long side, including a vertical direction and various slope directions from the vertical direction, and the short side scanning direction refers to directions of various angles that can be scanned through the short side, including a horizontal direction and various slope directions from the horizontal direction. Thus, the vertical direction may be recorded in the above-described initial long-side scanning direction, and the horizontal direction may be recorded in the above-described initial short-side scanning direction.
Step 501: the method comprises the steps of scanning the touch screen in the vertical direction to obtain the number of first touch areas corresponding to the vertical direction, and scanning the touch screen in the horizontal direction to obtain the number of second touch areas corresponding to the horizontal direction.
In practical applications, when step 501 is executed, it is necessary to select one scanning direction from the initial long side scanning directions for long side scanning and one scanning direction from the initial short side scanning directions for scanning.
In the embodiment of the present invention, two selected scanning directions are a vertical direction and a horizontal direction; according to different practical application scenarios, other scanning directions may also be selected, which is not described herein again.
Specifically, assume that the first number of touch areas is denoted as Nx and the second number of touch areas is denoted as Ny.
The touch area is an area where a continuous optical path blocked by a touch point is located in one scanning direction.
Step 502: and comparing the number of the first touch areas with the number of the second touch areas to obtain a comparison result, and adjusting the initial long-side scanning direction and the initial short-side scanning direction according to the comparison result to obtain a target long-side scanning direction and a target short-side scanning direction.
Specifically, in the embodiment of the present invention, when step 502 is executed, the number of the first touch areas and the number of the second touch areas may be compared, and a frame with a higher distinguishing degree in the long side and the short side is determined according to a comparison result, where the number of the touch areas and the distinguishing degree are positively correlated;
if the long edge region is higher in degree, adding a new long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction, and deleting the existing short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction;
if the short edge region is higher in degree, adding a new short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction, and deleting the existing long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction.
For example, the preset initial long side scanning direction and the preset initial short side scanning direction may be adjusted according to the magnitude of Nx and Ny, and the method is specifically divided into, but not limited to, the following two cases:
in the first case: if the number of the first touch areas is greater than that of the second touch areas and the difference value reaches a first set threshold value T1, that is, Nx is greater than or equal to Ny + T1, it indicates that the degree of the long-edge area is higher, then L1 long-edge scanning directions need to be selected from preset candidate long-edge scanning directions to be combined with the initial long-edge scanning direction, so as to obtain a target long-edge scanning direction; and deleting L1 short edge scanning directions from the preset initial short edge scanning direction to obtain a target short edge scanning direction, wherein the number of long edge scanning directions contained in the candidate long edge scanning direction is not less than L1.
T1 and L1 are parameters set according to empirical values. Alternatively, L1 takes the value of (the number of long-side scanning directions included in the candidate long-side scanning directions/2).
Further, when L1 long-side scanning directions are selected from the preset candidate long-side scanning directions, optionally, the long-side scanning directions in the candidate long-side scanning directions may be sorted in order of decreasing slope, and the first L1 long-side scanning directions are selected.
Further, when deleting L1 short side scanning directions from the initial short side scanning direction, optionally, the short side scanning directions in the initial short side scanning direction may be sorted in order of decreasing slope, and the first L2 short side scanning directions may be deleted.
In the second case: if the number of the second touch areas is greater than the number of the first touch areas and the difference value reaches a second set threshold value T2, that is, Ny is greater than or equal to Nx + T2, it indicates that the short edge discrimination is higher, then L2 short edge scanning directions need to be selected from preset candidate short edge scanning directions to be combined with the initial short edge scanning direction, so as to obtain a target short edge scanning direction; and deleting L2 long side scanning directions from the preset initial long side scanning direction to obtain a target long side scanning direction, wherein L2 is not more than the number of short side scanning directions contained in the candidate short side scanning directions.
T2 and L2 are parameters set according to empirical values, and optionally, L2 takes a value of (the number of short-side scanning directions included in the candidate short-side scanning directions/2).
In the embodiment of the present invention, T1 ═ T2 ═ 1, and L1 ═ L2 ═ 1, but in practical applications, the values of T1 and T2 may also be different, and the values of L1 and L2 may also be different, which is not described herein again.
Further, when L2 short side scanning directions are selected from the preset candidate short side scanning directions, optionally, the short side scanning directions in the candidate short side scanning directions may be sorted in order of decreasing slope, and the first L2 long side scanning directions are selected.
Further, when deleting L2 long side scanning directions from the initial long side scanning direction, it is optional to sort the long side scanning directions in the initial long side scanning direction in order of decreasing slope and delete the first L2 long side scanning directions.
Step 503: and scanning and detecting the touch screen according to the long-edge scanning direction and the short-edge scanning direction of the target.
The above steps 500 to 503 are scanning direction adjustment schemes designed for one scanning cycle, and by adopting the above technical scheme, in each scanning cycle, the scanning direction can be increased for the frame with high resolution, and the scanning direction can be decreased for the frame with low resolution, so that more touch areas can be obtained on the frame with high resolution, and the scanning frequency can be decreased on the frame with low resolution, so that the recognition accuracy of the touch points can be effectively improved on the premise of not increasing the scanning frequency greatly.
For example, the scan frames shown in fig. 4A-4C are still taken as examples.
Assume that the number of initial long-side scanning directions is 2, the number of initial short-side scanning directions is 2, the number of candidate long-side scanning directions is 2, and the number of candidate short-side scanning directions is 2.
Then, as shown in fig. 6A, it is assumed that after scanning in the vertical direction and the horizontal direction, the first number of touch areas obtained in the vertical direction is 4 (i.e., touch areas obtained by scanning in the direction 1), and the second number of touch areas obtained in the horizontal direction is 1 (i.e., touch areas obtained by scanning in the direction 2).
Obviously, since the first number of touch areas is greater than the second number of touch areas and the difference is greater than the first set threshold T1 (assuming that T1 is 1), it is determined that the long-edge discrimination is higher than the short-edge discrimination.
Then, a new long-side scanning direction needs to be added to the initial long-side scanning direction to obtain the target long-side scanning direction, specifically, the number of long-side scanning directions included in the target long-side scanning direction is: 2+2/2 is equal to 3, and at the same time, the existing short-side scanning direction needs to be deleted in the initial short-side scanning direction to obtain the target short-side scanning direction, specifically, the number of short-side scanning directions included in the target short-side scanning direction is: 2-2/2 ═ 1.
Then, as shown in fig. 6B, after scanning the touch screen in the long side scanning direction of the target, 4 touch areas are obtained in the direction 1, 4 touch areas are obtained in the direction 3, 5 touch areas are obtained in the direction 4' (the newly added long side scanning direction), and 1 touch area is obtained in the direction 2.
Because the newly added direction 4 'has 5 touch areas, 5 touch points in the touch screen can be identified by calculating the overlapping areas of the touch areas corresponding to the direction 1, the direction 3, the direction 4' and the direction 2, and a polygon formed by the overlapping areas is small.
In summary, in the embodiment of the present invention, the electronic device for performing scanning detection on a touch screen at least includes a first scanning unit 70, an adjusting unit 71 and a second scanning unit 72, wherein,
the first scanning unit 70 is configured to scan the touch screen based on one scanning direction of the long-side scanning direction to obtain a corresponding first number of touch regions, and scan the touch screen based on one scanning direction of the short-side scanning direction to obtain a corresponding second number of touch regions, where a touch region is a region formed by a continuous light path blocked by a touch point in one scanning direction;
an adjusting unit 71, configured to compare the number of the first touch areas with the number of the second touch areas, and adjust the number of preset initial long-side scanning directions and initial short-side scanning directions according to a comparison result, so as to obtain a target long-side scanning direction and a target short-side scanning direction;
and the second scanning unit 72 is used for performing scanning detection on the touch screen according to the target long-side scanning direction and the target short-side scanning direction.
Optionally, one of the long-side scanning directions adopted by the first scanning unit 70 is a vertical direction;
one scanning direction of the short side scanning direction adopted by the first scanning unit 70 is the horizontal direction.
Optionally, when comparing the number of the first touch areas with the number of the second touch areas, and adjusting the number of the preset initial long side scanning direction and the number of the preset initial short side scanning direction according to the comparison result, the adjusting unit 71 is configured to:
determining a frame with higher distinguishing degree in the long side and the short side according to the comparison result, wherein the number of the touch areas is positively correlated with the distinguishing degree;
if the long edge region is higher in degree, adding a new long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction, and deleting the existing short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction;
if the short edge region is higher in degree, adding a new short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction, and deleting the existing long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction.
Optionally, when determining the border with the higher division degree in the long side and the short side according to the comparison result, the adjusting unit 71 is configured to:
if the number of the first touch areas is larger than that of the second touch areas and the difference value reaches a first set threshold value, determining that the degree of the long edge area is higher;
and if the number of the second touch areas is larger than that of the first touch areas and the difference value reaches a second set threshold value, determining that the short edge discrimination is higher.
Optionally, if the long-side region is higher in degree, a new long-side scanning direction is added in the initial long-side scanning direction to obtain a target long-side scanning direction, and an existing short-side scanning direction is deleted in the initial short-side scanning direction, and when the target short-side scanning direction is obtained, the adjusting unit 71 is configured to:
selecting L1 long-edge scanning directions from preset candidate long-edge scanning directions, and combining the long-edge scanning directions with the initial long-edge scanning direction to obtain a target long-edge scanning direction; deleting L1 short edge scanning directions from the preset initial short edge scanning direction to obtain a target short edge scanning direction, wherein L1 is a preset parameter;
if the short edge discrimination is higher, adding a new short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction, deleting the existing long edge scanning direction in the initial long edge scanning direction, and when obtaining the target long edge scanning direction, the adjusting unit is used for:
selecting L2 short edge scanning directions from preset candidate short edge scanning directions, and combining the short edge scanning directions with the initial short edge scanning direction to obtain a target short edge scanning direction; and deleting L2 long side scanning directions from the preset initial long side scanning direction to obtain a target long side scanning direction, wherein L2 is a preset parameter.
Optionally, the adjusting unit is further configured to:
when L1 long-edge scanning directions are selected from preset candidate long-edge scanning directions, sorting each long-edge scanning direction in the candidate long-edge scanning directions according to the sequence of the gradient from large to small, and selecting the first L1 long-edge scanning directions; when deleting L1 short side scanning directions from the initial short side scanning directions, sequencing each short side scanning direction in the initial short side scanning directions according to the sequence of the slope from small to large, and deleting the front L2 short side scanning directions; alternatively, the first and second electrodes may be,
when L2 short side scanning directions are selected from preset candidate short side scanning directions, all the short side scanning directions in the candidate short side scanning directions are sequenced from large to small according to the slope, the front L2 short side scanning directions are selected, and when L2 long side scanning directions are deleted from the initial long side scanning directions, all the long side scanning directions in the initial long side scanning directions are sequenced from small to large according to the slope, and the front L2 long side scanning directions are deleted.
In the embodiment of the invention, the touch screen is scanned based on one scanning direction of the long side scanning direction to obtain the number of first touch areas, the touch screen is scanned based on one scanning direction of the short side scanning direction to obtain the number of second touch areas, the number of the first touch areas and the number of the second touch areas are compared, the preset number of the initial long side scanning direction and the preset number of the initial short side scanning direction are adjusted according to the comparison result to obtain the target long side scanning direction and the target short side scanning direction, and the touch screen is scanned and detected according to the target long side scanning direction and the target short side scanning direction. Like this, in each scanning cycle, can be according to the real-time change of long limit discrimination and minor face discrimination, adjust long limit scanning direction and minor face scanning direction in a flexible way, can select the high frame of discrimination to set up more scanning directions in long limit and minor face promptly, in order to obtain more touch area, thereby effectively avoided the hourglass of touch point to examine, thereby improved the recognition accuracy of touch point, also improved the response speed of touch-sensitive screen, promoted user's use experience by a wide margin.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (12)
1. A touch screen scanning detection method is characterized by comprising the following steps:
scanning the touch screen based on one scanning direction of the long-edge scanning direction to obtain a corresponding first touch area number, and scanning the touch screen based on one scanning direction of the short-edge scanning direction to obtain a corresponding second touch area number, wherein the touch area is an area formed by continuous light paths shielded by touch points in one scanning direction;
comparing the number of the first touch areas with the number of the second touch areas, and adjusting the number of the preset initial long-edge scanning direction and the number of the preset initial short-edge scanning direction according to the comparison result to obtain a target long-edge scanning direction and a target short-edge scanning direction;
and scanning and detecting the touch screen according to the long-edge scanning direction and the short-edge scanning direction of the target.
2. The method of claim 1, wherein one of the long side scan directions is a vertical direction;
one of the short side scanning directions is a horizontal direction.
3. The method of claim 1, wherein comparing the first number of touch areas with the second number of touch areas and adjusting the number of preset initial long side scanning directions and initial short side scanning directions according to the comparison result comprises:
determining a frame with higher distinguishing degree in the long side and the short side according to the comparison result, wherein the number of the touch areas is positively correlated with the distinguishing degree;
if the long edge region is higher in degree, adding a new long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction, and deleting the existing short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction;
if the short edge region is higher in degree, adding a new short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction, and deleting the existing long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction.
4. The method of claim 3, wherein determining the higher-degree bounding box in the long side and the short side based on the comparison comprises:
if the number of the first touch areas is larger than that of the second touch areas and the difference value reaches a first set threshold value, determining that the degree of the long edge area is higher;
and if the number of the second touch areas is larger than that of the first touch areas and the difference value reaches a second set threshold value, determining that the short edge discrimination is higher.
5. The method of claim 3 or 4, wherein if the long edge separation degree is higher, adding a new long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction, and deleting an existing short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction, comprises:
selecting L1 long-edge scanning directions from preset candidate long-edge scanning directions, and combining the long-edge scanning directions with the initial long-edge scanning direction to obtain a target long-edge scanning direction; deleting L1 short edge scanning directions from the preset initial short edge scanning direction to obtain a target short edge scanning direction, wherein L1 is a preset parameter;
if the short edge discrimination is higher, then add new short edge scanning direction in the initial short edge scanning direction, obtain target short edge scanning direction, and delete existing long edge scanning direction in the initial long edge scanning direction, obtain target long edge scanning direction, include:
selecting L2 short edge scanning directions from preset candidate short edge scanning directions, and combining the short edge scanning directions with the initial short edge scanning direction to obtain a target short edge scanning direction; and deleting L2 long side scanning directions from the preset initial long side scanning direction to obtain a target long side scanning direction, wherein L2 is a preset parameter.
6. The method of claim 5, further comprising:
when L1 long-edge scanning directions are selected from preset candidate long-edge scanning directions, sorting each long-edge scanning direction in the candidate long-edge scanning directions according to the sequence of the gradient from large to small, and selecting the first L1 long-edge scanning directions; when deleting L1 short side scanning directions from the initial short side scanning directions, sequencing each short side scanning direction in the initial short side scanning directions according to the sequence of the slope from small to large, and deleting the front L2 short side scanning directions; alternatively, the first and second electrodes may be,
when L2 short side scanning directions are selected from preset candidate short side scanning directions, all the short side scanning directions in the candidate short side scanning directions are sequenced from large to small according to the slope, the front L2 short side scanning directions are selected, and when L2 long side scanning directions are deleted from the initial long side scanning directions, all the long side scanning directions in the initial long side scanning directions are sequenced from small to large according to the slope, and the front L2 long side scanning directions are deleted.
7. A touch screen scanning detection device, comprising:
the touch screen display device comprises a first scanning unit, a second scanning unit and a control unit, wherein the first scanning unit is used for scanning the touch screen based on one scanning direction of a long-edge scanning direction to obtain a corresponding first touch area number, and scanning the touch screen based on one scanning direction of a short-edge scanning direction to obtain a corresponding second touch area number, and the touch area is an area formed by continuous light paths shielded by touch points in one scanning direction;
the adjusting unit is used for comparing the number of the first touch areas with the number of the second touch areas, and adjusting the number of the preset initial long-edge scanning direction and the number of the preset initial short-edge scanning direction according to the comparison result to obtain a target long-edge scanning direction and a target short-edge scanning direction;
and the second scanning unit is used for scanning and detecting the touch screen according to the target long side scanning direction and the target short side scanning direction.
8. The apparatus according to claim 7, wherein one of the long side scanning directions employed by the first scanning unit is a vertical direction;
one scanning direction of the short side scanning directions adopted by the first scanning unit is a horizontal direction.
9. The apparatus of claim 7, wherein when comparing the first number of touch areas with the second number of touch areas and adjusting the number of preset initial long side scanning directions and initial short side scanning directions according to the comparison result, the adjusting unit is configured to:
determining a frame with higher distinguishing degree in the long side and the short side according to the comparison result, wherein the number of the touch areas is positively correlated with the distinguishing degree;
if the long edge region is higher in degree, adding a new long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction, and deleting the existing short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction;
if the short edge region is higher in degree, adding a new short edge scanning direction in the initial short edge scanning direction to obtain a target short edge scanning direction, and deleting the existing long edge scanning direction in the initial long edge scanning direction to obtain a target long edge scanning direction.
10. The apparatus of claim 9, wherein when determining the higher-degree border in the long side and the short side according to the comparison result, the adjusting unit is configured to:
if the number of the first touch areas is larger than that of the second touch areas and the difference value reaches a first set threshold value, determining that the degree of the long edge area is higher;
and if the number of the second touch areas is larger than that of the first touch areas and the difference value reaches a second set threshold value, determining that the short edge discrimination is higher.
11. The apparatus according to claim 9 or 10, wherein if the long edge region is higher in degree, the adjusting unit is configured to add a new long edge scanning direction in the initial long edge scanning direction to obtain the target long edge scanning direction, and delete an existing short edge scanning direction in the initial short edge scanning direction to obtain the target short edge scanning direction, and is configured to:
selecting L1 long-edge scanning directions from preset candidate long-edge scanning directions, and combining the long-edge scanning directions with the initial long-edge scanning direction to obtain a target long-edge scanning direction; deleting L1 short edge scanning directions from the preset initial short edge scanning direction to obtain a target short edge scanning direction, wherein L1 is a preset parameter;
if the short edge discrimination is higher, then add new short edge scanning direction in the initial short edge scanning direction, obtain target short edge scanning direction, and delete existing long edge scanning direction in the initial long edge scanning direction, obtain target long edge scanning direction, include:
selecting L2 short edge scanning directions from preset candidate short edge scanning directions, and combining the short edge scanning directions with the initial short edge scanning direction to obtain a target short edge scanning direction; and deleting L2 long side scanning directions from the preset initial long side scanning direction to obtain a target long side scanning direction, wherein L2 is a preset parameter.
12. The apparatus of claim 11, wherein the adjustment unit is further to:
when L1 long-edge scanning directions are selected from preset candidate long-edge scanning directions, sorting each long-edge scanning direction in the candidate long-edge scanning directions according to the sequence of the gradient from large to small, and selecting the first L1 long-edge scanning directions; when deleting L1 short side scanning directions from the initial short side scanning directions, sequencing each short side scanning direction in the initial short side scanning directions according to the sequence of the slope from small to large, and deleting the front L2 short side scanning directions; alternatively, the first and second electrodes may be,
when L2 short side scanning directions are selected from preset candidate short side scanning directions, all the short side scanning directions in the candidate short side scanning directions are sequenced from large to small according to the slope, the front L2 short side scanning directions are selected, and when L2 long side scanning directions are deleted from the initial long side scanning directions, all the long side scanning directions in the initial long side scanning directions are sequenced from small to large according to the slope, and the front L2 long side scanning directions are deleted.
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