A touch system with track detecting function includes a touch pad for sequentially sensing a plurality of positions of an indication object at a plurality of moments in order to detect a track of the indication object on the touch pad, and a processor for continuously generating motion vectors according to the track of the indication object on the touch pad, for generating a candidate motion vector according to at least one motion vector, and for nonlinearly generating a target motion vector according to the candidate motion vector in order to move a target shown on a display panel. Each of the motion vectors represents a difference between a position of the indication object and a next position of the indication object.
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0. 7. A touch system, comprising:
a touch pad, configured to successively obtain a first motion vector and a second motion vector according to a track of an indication object moving thereon;
a display panel, configured to show a cursor thereon; and
a processor, configured to
relatively move the cursor on the display panel according to a target motion vector generated according to the first motion vector and the second motion vector,
determine a inertial vector which has a speed and a direction from a start point of the first motion vector to an end point of the second motion vector, and
continuously move the cursor on the display panel by the inertial vector after the indication object stops moving, at the end point of the second motion vector, on the touch pad.
0. 10. A touch system, comprising:
a touch pad, configured to successively obtain a first motion vector and a second motion vector according to a track of an indication object moving thereon;
a display panel, configured to show a cursor thereon; and
a processor, configured to
relatively move the cursor on the display panel according to a target motion vector generated according to the first motion vector and the second motion vector,
determine a inertial vector which has a speed and a direction from a start point of the first motion vector to an end point of the second motion vector, and
continuously move the cursor on the display panel by the inertial vector for a predetermined time after the indication object leaves, at the end point of the second motion vector, the touch pad.
1. A method for controlling a touch system, comprising:
sensing a track of an indication object on a touch pad;
continuously obtaining motion vectors according to the track of the indication object;
generating a candidate motion vector by summing a plurality of unweighted motion vectors, and nonlinearly generating a target motion vector according to by converting the candidate motion vector to the target motion vector according to a nonlinear function;
moving a target shown on a display panel according to the target motion vector, wherein a displayed track over which the target is moved on the display panel represents a smoother version of the track of the indication object on the touch pad; and
when the candidate motion vector is smaller than a predetermined value, determining the indication object being on any area of the touch pad stopped moving, and continuing to move the target along a direction of the candidate motion vector;
wherein each of the motion vectors represents a moving distance and a moving direction from a position of the indication object to a next position of the indication object, and the indication object is on the touch pad of the touch system.
0. 2. The method of
converting the candidate motion vector to the target motion vector according to a nonlinear function.
3. The method of
when the candidate motion vector is smaller than the predetermined value, continuously moving the target along the direction of the candidate motion vector at a predetermined speed;
wherein the predetermined speed is directly proportional to the magnitude of the candidate motion vector.
4. The method of
5. The method of
when determining the indication object not on the touch pad, moving the target according to the target motion vector, and then moving the target in a predetermined time.
6. The method of
when determining the indication object not on the touch pad, moving the target according to the target motion vector, and then moving the target with a decreasing speed from an original speed when moving the target.
0. 8. The touch system as claimed in claim 7, wherein the target motion vector is nonlinearly generated according to a candidate motion vector, and the candidate motion vector is generated by summing the first motion vector and the second motion vector.
0. 9. The touch system as claimed in claim 7, wherein the speed is determined according to a variation of the first motion vector and the second motion vector.
0. 11. The touch system as claimed in claim 10, wherein the speed is determined according to a variation of the first motion vector and the second motion vector.
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This application is a broadening reissue of U.S. Pat. No. 9,619,072 B2, issued on Apr. 11, 2017, which is a U.S. Utility patent application Ser. No. 13/295,098, filed on Nov. 14, 2011, which is based upon and claims the benefit of priority to Taiwanese Patent Application No. 100131079 A, filed on Aug. 30, 2011. The disclosures of the above-listed applications are hereby incorporated by reference herein in their entirety.
1. Field of the Invention
The present invention relates to a touch system, and more particularly, to a touch system with track detecting function.
2. Description of the Prior Art
In a traditional touch system, a target shown on a display panel (such as a cursor) is moved according to movements of a finger on a touch pad. In the prior art, a moving distance of a user's finger is normally equal to a moving distance of the cursor. In other words, a size of the touch pad needs to be the same size as the display panel, which would increase the cost. The moving distance of the cursor needs to be a predetermined times of the moving distance of the finger for reducing the size of the touch pad. However, accuracy of the touch pad is reduced as well. Take a touch pad with a width of X for example. If the user tries to move the cursor a distance of 2×, the finger is needed to move on the touch pad a distance of X twice. Or, a resolution of the touch pad must be reduced, such that the cursor is moved the distance of 2× accordingly when the finger moves on the touch pad the distance of X once. But such arrangement reduces accuracy of the touch pad. Therefore, manufacturers of the touch system of the prior art faces a dilemma of increasing cost or reducing accuracy.
The present invention provides a touch system with track detecting function and a method thereof. The touch system comprises a touch pad for sensing a track of an indication object to generate a target motion vector in order to move a target shown on a display panel smoothly along a desired direction. The present invention can determine an inertial motion of the indication object, such that when the indication object stops moving, the target can continue to move according to the inertial motion of the indication object. The target can be moved in a predetermined time or moved with an increasing speed or a decreasing speed according to the inertial motion of the indication object.
Furthermore, according to the present invention, the target shown on a display panel is moved along a smooth track according to the target motion vectors.
The present invention obtains the target motion vector of the target by a nonlinear function according to a plurality of motion vectors generated by the indication object to. Therefore, the motion vectors of the indication object are needed to be obtained continuously in the present invention.
The present invention further provides a method for controlling a touch system. The method comprises sensing a track of an indication object for generating a first and a second motion vectors; generating a candidate motion vector according to the first and the second motion vectors, and generating a target motion vector according to the candidate motion vector; and moving a target according to the target motion vector; wherein the indication object is positioned on a touch pad of the touch system.
These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
Please refer to
The touch pad 120 continuously detects the track of the indication object F moving on the touch pad 120. Note that a size ratio between the touch pad 120 and the indication object F does not affect the detecting result. As long as the touch pad 120 continuously detects the track of the indication object F, a target motion vector can be generated.
The below embodiment illustrates how the present invention detects the track of the indication object and generates target motion vectors. In the embodiment, the touch pad 120 samples the track of the indication object F moving on the touch pad with a sampling frequency FS, and obtains a plurality of motion vectors MVS. More particularly, compared to a moving speed of the indication object F, the sampling frequency FS is fast enough to obtain more moving information of the indication object F. The processor 130 generates target motion vectors MVC for moving the target C on the display panel 110 according to the received motion vectors MVS.
In the present invention, the processor 130 generates the target motion vector MVC of the target C according to at least one motion vector MVS. For example, the touch pad 120 samples at moments T0, T1, T2, T3, and obtains the motion vectors MVS1, MVS2, MVS3 respectively. The processor 130 then generates the target motion vectors MVC according to the motion vectors MVS1, MVS2, MVS3. The greater the motion vectors MVS1, MVS2, MVS3 (which means the indication object F moves faster) are, the greater (or less) the target motion vector MVC will be. In addition, if the indication object F stops moving or stops for a period of time, the processor 130 can move the target C at a predetermined speed or with a decreasing speed according to a direction from a start point of the motion vector MVS1 to a end point of the motion vector MVS3 and variation of the motion vectors MVS1, MVS2, MVS3. Similarly, if the touch sensor 140 determines that the indication object F is not on the touch pad 120 at the moment T3, the processor 130 can move the target C in a predetermined time or with a decreasing speed according to the direction from the start point of the motion vector MVS1 to the end point of the motion vector MVS3 and the variation of the motion vectors MVS1, MVS2, MVS3.
The present invention can be utilized in a product with a touch pad larger or smaller than a touched area of the indication object. Take a portable electronic device with a touch pad for example, if the size of the touch pad is much larger than the touched area of the indication object, it is not convenient for a user to move a finger through the whole touch pad. The processor can generate target motion vectors according to a plurality of motion vectors when the user moves his finger on a partial area of the touch pad. Take another electronic device with a finger navigation module (such as a mobile phone or a computer) for example, if the size of the finger navigation module is equal to or smaller than the touched area of the indication object, it is not convenient for the user to move the finger repeatedly for moving a target (such as a cursor) a longer distance. The processor can generate target motion vectors according to a plurality of motion vectors when the user moves his finger on the finger navigation module.
As shown in
In the embodiment of
In addition, the processor 130 determines whether the indication object F stops moving according to the latest motion vectors provided by the touch pad 120. In the embodiment, the processor 130 determines whether the indication object F stops moving according to the candidate motion vector MVX5. If the candidate motion vector MVX5 is smaller than a predetermined value MVP, the processor 130 determines the indication object F stopped moving. In this case, after the target C is moved according to the target motion vector MVC5, the processor 130 further moves the target C at a predetermined speed VP. If the candidate motion vector MVX5 is smaller than the predetermined value MVP and the touch sensor 140 determines the indication object F not on the touch pad 120, the target C is moved by the processor 130 along a direction of the target motion vector MVC5, and then the processor 130 moves the target C for a predetermined time TP, or moves the target C with a decreasing speed till to zero (inertial motion). For example, a speed equation can be set as V(t)=VO5−Ct, wherein VO5 is the speed of the target C moving along the direction of the target motion vector MVC5, C is a constant, t is time.
Please refer to
In addition, the touch pad of the touch system of the present invention can be an optical type, a resistive type, a capacitive type, or other type touch pad according to design requirements. When the touch pad has a touch detection function, such as a resistive touch pad or a capacitive touch pad, the touch system can operate without the touch sensor.
Summarizing the above, the touch system of the present invention obtains a plurality of the motion vectors of the indication object to linearly or nonlinearly move the target shown on the display panel, effectively increasing a signal to noise ratio (SNR) of the touch system. In addition, when the indication object stops moving or is not on the touch pad, the touch system of the present invention continues to move the target as an inertial motion, which brings more conveniences.
Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.
Patent | Priority | Assignee | Title |
Patent | Priority | Assignee | Title |
4734685, | Jul 28 1983 | Canon Kabushiki Kaisha | Position control apparatus |
5327161, | Aug 09 1989 | 3M Innovative Properties Company | System and method for emulating a mouse input device with a touchpad input device |
5661502, | Feb 16 1996 | SAMSUNG ELECTRONICS CO , LTD | Self-adjusting digital filter for smoothing computer mouse movement |
5825351, | May 12 1994 | Apple Computer, Inc. | Method and apparatus for noise filtering for an input device |
5956019, | Sep 28 1993 | The Boeing Company | Touch-pad cursor control device |
6323846, | Jan 26 1998 | Apple Inc | Method and apparatus for integrating manual input |
7167162, | Dec 12 2003 | AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LIMITED | Apparatus and method for controlling a screen pointer |
7324088, | Jan 07 2004 | Pixart Imaging Inc. | Locus smoothing method and pointing device utilising the same |
8692767, | Jul 13 2007 | Synaptics Incorporated | Input device and method for virtual trackball operation |
20030169239, | |||
20060159177, | |||
20070097093, | |||
20080055275, | |||
20090265658, | |||
20100103191, | |||
20110050607, | |||
CN101751195, | |||
CN101833383, | |||
CN101833389, | |||
CN101957721, | |||
CN102073401, | |||
CN102117141, | |||
CN102163096, |
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