TWI438652B - Method and apparatus for enabling scaling display on the touch pad - Google Patents

Description

Method and electronic device for realizing display content zoom on touch panel

The invention relates to a method for realizing zooming of display content on a touch panel and an electronic device for realizing the zooming method, in particular to a method for realizing zooming of display content by touch panel gesture recognition and an electronic device for realizing the zooming method.

Touchpads are now widely used in personal digital assistants (PDAs), mobile phones, PDAs, laptops and other electronic devices. The touchpad is an input device for a user or a conductive object (such as a stylus) to slide or touch on the panel, which can make the cursor relatively move and support other extension functions, such as button emulation function.

At present, in order to perform the display content zoom function, the user generally needs to select and execute the related icon displayed on the display through an input device such as a mouse, a touchpad, etc., which is inconvenient to operate. If the user gesture can be recognized by the touchpad to perform the display content zoom function, the related operations will be made very simple and user-friendly.

In view of the above, it is necessary to provide a method for realizing display content scaling on a touch panel and an electronic device for implementing the scaling method and an operation method thereof.

An electronic device that implements display content scaling on a touch panel, including a display, a touchpad placed in front of the display, a memory, and a controller. The memory is used to store the coordinate values of the touchpad output. The controller is configured to control the content displayed on the display when the coordinate value output by the touch panel meets the preset condition. The memory also stores a time preset. The electronic device further includes: a timer that starts timing when the memory receives the touch position information, and determines whether the touch panel detects a new touch action within the preset time value. A calculator that calculates the distance between the coordinate values of two touch objects at the same time. And the comparator compares the distance values calculated by the calculator at different times. The controller is further configured to perform a determination of the zoom gesture according to the comparison result of the comparator, and control the scaling of the displayed content on the display according to the determination result.

A method for implementing display content zooming on a touch panel, comprising the steps of: storing coordinate values of two touch objects at a first moment, recording as a first reference position and a second reference position; the timer starts timing, and detecting whether There is a new touch action in the preset time value; if a new touch action is detected within the preset time, the stored coordinate values of the two touch objects are recorded as the third reference position and the fourth reference position; a distance value between the first reference position and the second reference position and a distance value between the third reference position and the fourth reference position; comparing the distance value of the calculated value; determining the zoom gesture according to the comparison result, if the first reference The distance value between the position and the second reference position is smaller than the distance value between the third reference position and the fourth reference position, and is recognized as a zoom-in gesture, and the content displayed on the display is enlarged; if the first reference position and the second reference are The distance value between the positions is greater than the distance value between the third reference position and the fourth reference position, and is recognized as a zoom-out gesture, and the content displayed on the display is reduced; Erase coordinate values recorded.

Compared with the prior art, the method for realizing the zooming of the display content on the touch panel provided by the present invention can realize the zooming function of the display content by changing the relative position between the touched objects such as the finger, so that the user's operation is more convenient and Humanization and improved operational efficiency.

Referring to FIG. 1 , the electronic device 100 includes a display 11 , a touch panel 12 , and a memory 13 . The touch panel 12 is mounted on the front side of the display 11. The electronic device 100 can be an electronic product such as an electronic photo frame, an electronic book, or a camera.

The display 11 is for displaying contents such as images, pictures, and the like. The touch panel 12 is configured to detect a user touch and output touch position information including a coordinate value. The memory 13 is configured to store the coordinate value output by the touch panel 12; the memory 13 is further configured to store a time preset value t; and when the zoom gesture recognition operation is completed, the memory 13 is reset, and the recorded coordinates are erased. value. The preset time value t is set to the time required for the user to complete a complete zooming action on the touchpad 12, and the user can change the value of the preset time value t to suit different situations.

The electronic device 100 also includes a timer 14, a calculator 15, a comparator 16, and a controller 17. The timer 14 is configured to start timing while the memory 13 receives the touch position information, and determine whether the touch panel 12 detects a new touch action within the preset time value t. The calculator 15 is used to calculate the distance between the coordinate values of the two touch objects at the same time. The comparator 16 is configured to compare the distance values respectively calculated by the calculator 15 at different times. The controller 17 is configured to perform a determination of the zoom gesture according to the comparison result of the comparator 16, and control the zoom of the display content on the display 11 according to the determination result.

Referring to FIG. 2, the present invention further provides a method for implementing a display content zoom function on a touch panel using the above electronic device 100, which includes the following steps:

Step S10: When the touch panel 12 detects that two fingers touch the touch interface of the touch panel at a certain moment, the memory 13 records the position information touched by each finger, and records the first reference position and the second reference. Position, then proceeds to step S12.

Step S12: the memory 13 starts counting while receiving the touch position information, and the touch panel 12 detects whether there is a new touch action within the preset time value t; if a new time is detected within the preset time If the touch action does not detect a new touch action within the preset time, it is not necessary to record the touch position information, and the process proceeds directly to step S22.

When the user presses two points first, then releases and then presses two intermittent touches, the touchpad also detects the change of the touch point position information, but the user does not want to perform the zoom operation at this time. . In general, the time that the user completes the intermittent touch action will be greater than the preset time value t. By setting a preset time value t in advance, the user's intermittent touch can be prevented from being mistaken for the zoom action. An error occurred.

Step S14: The position information of the new touch action detected by the touch panel 12, and the position information touched by each finger is recorded by the memory 13 to be recorded as the third reference position and the fourth reference position, and then proceeds to step S16.

Step S16: The calculator 15 calculates a distance value between the first reference position and the second reference position, and records it as D1, calculates a distance value between the third reference position and the fourth reference position, and records it as D2, and then proceeds to step S18. .

Step S18: D1 and D2 are compared by the comparator 16, and then the process proceeds to step S20.

Step S20: The controller 17 performs the determination of the zoom gesture according to the comparison result, and controls the zoom of the display content on the display 11 according to the determination result; if D1 is smaller than D2, it is recognized as a zoom-in gesture, and the controller 17 issues a zoom-in gesture signal and The content displayed on the control display 11 is enlarged; if D1 is greater than D2, it is recognized as a reduction gesture, the controller 17 issues a reduction gesture signal and controls the reduction of the content displayed on the display 11, and then proceeds to step S22.

Step S22: The memory 13 is reset, and the recorded coordinate value is erased to greet the user's new operation.

When only one of the first finger or the second finger moves and the other finger remains stationary, only the change in the position coordinate of the moving finger is the basis for controlling the zoom operation.

The touch objects in the above embodiments are all illustrated by a finger, and the touch object can also be a touch device such as a stylus. The touchpad is an infrared touchpad.

It is to be understood that those skilled in the art can make various other changes and modifications in accordance with the technical concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.

11‧‧‧ Display

12‧‧‧ touchpad

13‧‧‧ memory

14‧‧‧Timer

15‧‧‧Calculator

16‧‧‧ comparator

17‧‧‧ Controller

FIG. 1 is a functional block diagram of an electronic device that implements a display content zoom function on a touch panel according to the present invention.

2 is a flow chart of a method for recognizing a zoom gesture of the electronic device shown in FIG. 1.

Claims (8)

An electronic device for implementing a display content zoom function on a touch panel, comprising a display, a touch panel disposed in front of the display, a memory, and a controller;
The memory is used to store the coordinate value of the touch panel output;
a controller, configured to control content displayed on the display when a coordinate value output by the touch panel meets a preset condition;
The memory further stores a time preset value; the electronic device further includes:
The timer starts timing when the memory receives the touch position information, and determines whether the touch panel detects a new touch action within the preset time value;
a calculator that calculates the distance between the coordinate values of the two touch objects at the same time; and a comparator that compares the distance values calculated by the calculator at different times; the controller is further configured to perform the comparison result according to the comparator The determination of the gesture is scaled, and the scaling of the displayed content on the display is controlled based on the determination result. The electronic device of claim 1, wherein, when the distance between the coordinate values of the two touch objects at a later time is greater than the distance between the coordinate values of the two touch objects at the previous time, The controller recognizes that the zoom gesture is to control the content displayed on the display to be enlarged; when the distance between the coordinate values of the two touch objects at a later time is less than the distance between the coordinate values of the two touch objects at the previous moment, then the control The device recognizes as a zoom out gesture and controls the content displayed on the display to shrink. The electronic device of claim 1, wherein if the touch panel does not detect a new touch action within a preset time, the weight is determined and the recorded coordinate value is erased. The electronic device of claim 1, wherein the touch panel is a touch screen, a touch panel or a tablet. A method for implementing display content scaling on a touchpad includes the following steps:
Storing the coordinate values of the two touch objects at the first moment, recorded as the first reference position and the second reference position;
Start timing and detect if there is a new touch action within the preset time value;
If a new touch action is detected within a preset time, the stored two touch object coordinate values are recorded as a third reference position and a fourth reference position;
Calculating a distance value between the first reference position and the second reference position and a distance value between the third reference position and the fourth reference position;
Comparing the distance values of the calculated values; and determining the zoom gesture based on the comparison result. The method of claim 5, wherein if the distance value between the first reference position and the second reference position is smaller than a distance between the third reference position and the fourth reference position, the identification is an amplification The gesture is to enlarge the displayed content; if the distance value between the first reference position and the second reference position is greater than the distance between the third reference position and the fourth reference position, the recognition is a zoom-out gesture, and the displayed content is reduced. The method of claim 5, wherein if a new touch action is not detected within a preset time, the weight is determined and the recorded coordinates are erased. The method of claim 5, wherein the preset time value is set to a time required for the user to complete a complete zooming action, and the user can change the value of the preset time according to different situations and store it in advance.