KR20040005563A - System automatically switch of executive program in personal digital assistant - Google Patents

Abstract

PURPOSE: A system for converting an active program for a PDA is provided to supply an automatic change of an execution window by using a knock sensing by applying an acceleration sensor to a PDA instead of a use of an inefficient user interface being generated by a small display size of the PDA, thereby solving an unnecessary use of a stylus pen. CONSTITUTION: A high pass filter removes an acceleration of gravity. An acceleration of gravity is generated in an acceleration sensor being mounted in a PDA according to poses changes of a PDA. Thus, a filter is used for detecting a fixed signal regardless of pose of the PDA(horizontal or vertical). A boundary filter removes a small signal being generated caused by a general small movement and is classified with a strike signal by removing a minute signal being generated in not in a strike signal or a light wobble.

Description

Execution program automatic switching system for PD {{SYSTEM AUTOMATICALLY SWITCH OF EXECUTIVE PROGRAM IN PERSONAL DIGITAL ASSISTANT}

The present invention relates to a system for automatically switching the execution program for PDA, and more particularly, to a system in which the programs being executed are automatically switched as a signal after detecting the tapping with an acceleration sensor embedded therein.

1 is a view showing a PDA according to the prior art.

Referring to FIG. 1, in the case of the user interface of the conventional PDA 2, due to miniaturization, it is not easy to adopt an input / output device such as a keyboard, a mouse, a high resolution screen, and the like, which has been used in a conventional desktop or notebook computer.

Also, it uses keypad and stylus pen 8 as input device and LCD display 6 that can display 6cm wide and 8cm wide as output device, which has less space to express than general PC, As performance is improved, the execution program can be switched by many inputs of the stylus pen 8 in order to execute a task while executing several execution programs at the same time. Therefore, various problems such as user's work efficiency decrease and inconvenience in using There is this.

Accordingly, an object of the present invention is to solve the unnecessary use of the stylus pen by applying a knock detection by applying an acceleration sensor to the PDA instead of using an inefficient user interface caused by the small display size of the PDA. To provide a conversion.

The present invention for achieving the above object,

1 shows a PDA according to the prior art.

2 is a diagram illustrating a system for automatically switching a PDA running program using an acceleration sensor according to the present invention.

3 shows a signal for a tap gesture.

4 is a diagram illustrating a configuration of an automatic PDA program switching system using an acceleration sensor according to the present invention.

5 is a diagram illustrating a process of determining switching of an execution program in an automatic PDA execution program switching system using an acceleration sensor according to the present invention;

6A is a diagram illustrating a signal detected by an acceleration sensor when a tap gesture occurs in the PDA program automatic switching system using the acceleration sensor according to the present invention;

FIG. 6B is a view illustrating a signal in which a DC component is removed from the signal of FIG. 6A through high pass filtering of a PDA program automatic switching system using an acceleration sensor according to the present invention. FIG.

FIG. 6C illustrates a signal in which a large or fine signal is removed from the signal of FIG. 6B through a boundary filter of a PDA program automatic switching system using an acceleration sensor according to the present invention. FIG.

FIG. 6D illustrates a signal from a plurality of peaks generated by a single gesture in the signal of FIG. 6C through debounce of a PDA program automatic switching system using an acceleration sensor according to the present invention. FIG.

7 is a diagram showing data obtained by examining the strength of individual signals.

8 is a diagram showing data obtained by examining a gesture generation time.

9A to 9E are views illustrating a process of performing an operation of an automatic program switching system for a PDA according to the present invention.

<Description of the symbols for the main parts of the drawings>

2. PDA 4. Acceleration Sensor

6. LCD display 8. Stylus fan

10. PDA expansion pack 12. Expansion pack connector

14. Tap Signal 16. Execution Program

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

According to the invention,

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a diagram illustrating a system for automatically switching a PDA executable program using an acceleration sensor according to the present invention.

Referring to FIG. 2, the acceleration sensor 4 is mounted to the outside of the mobile terminal such as the PDA 2 in an expandable manner. The acceleration sensor 4 detects tapping 14 of the PDA, and the detected signal 16 is transmitted to the PDA 2, and the execution program 16 is switched using the signal 16.

Here, the acceleration sensor 4 is built in the existing expansion pack 10 for PDA, which can be connected as a peripheral device on the back of the PDA 2. The connectors are serially connected to enable communication and power supply. By using the expansion pack 10 for PDA, not only the acceleration sensor 4 connection for the current program switching function but also the external peripheral devices for other functions can be connected and connected, and the module of the acceleration sensor 4 can be fixed and protected. It also helps in detecting signal 16.

3 is a form of signal detected by the acceleration sensor when a user taps the PDA lightly. In FIG. 3, the peak indicated as 'event' is a signal generated by a user's tapping signal. In addition, the small peaks appearing in the section (1) shown in FIG. 3 means a residual signal generated by the ringing.

4 is a configuration of an automatic PDA program switching system using an acceleration sensor according to the present invention, and shows a signal processing procedure for determining a tapping signal of a user from the signal detected by the acceleration sensor.

Referring to FIG. 4, a high pass filter removes gravity acceleration, and the acceleration sensor mounted on the PDA generates gravity acceleration according to the attitude change of the PDA. Therefore, a filter must be used to detect a constant signal regardless of the posture (horizontal or inclined) of the PDA. Boundary filter is a process of removing small signals that may occur in daily light movements. The boundary filter removes minute signals from slight shaking instead of tapping signals to distinguish them from tapping signals. Debouncing is a process of removing a plurality of peaks generated in one tapping signal, and peaks occurring at a time (about 0.1 second) corresponding to section (1) in FIG. 3. Is implemented by ignoring.

5 is a process of determining the switching of the execution program in the PDA execution program automatic switching system using the acceleration sensor according to the present invention, and is a flowchart of determining whether the execution program is switched after the tapping signal is detected. Referring to FIG. 5, when a 'beat signal' is detected, a flag is checked, and if the flag is set, the execution program is switched, and if the flag is not set, the flag does not operate. This is done by setting a specific flag using a system function when the switching function is needed when the application is executed, and registering its identifier (application handle or own address) so that when a tapping signal is detected, it is registered. Only applications will switch.

FIG. 6A illustrates a signal detected by the acceleration sensor when a tap gesture occurs in the PDA program automatic switching system using the acceleration sensor according to the present invention. That is, it indicates a signal detected by the acceleration sensor when the tap gesture occurs while holding the PDA in the hand.

FIG. 6B is a diagram illustrating a signal in which a DC component is removed from the signal of FIG. 6A through a high pass filter of a PDA program automatic switching system using an acceleration sensor according to the present invention. That is, the signal appears after removing the DC component of FIG. 6A using the highpass filter of FIG. 4.

FIG. 6C is a diagram illustrating a signal in which a large or fine signal is removed from the signal of FIG. 6B through a boundary filter of a PDA program automatic switching system using an acceleration sensor according to the present invention. That is, excessively large signal and minute signal ?? It is a process of removal. A large signal eliminates the factors that can cause a malfunction due to a strong impact, and a fine signal eliminates the factors that cause a slight vibration or a weak shake. 6C is a signal obtained by removing the above signals.

FIG. 6D illustrates a signal from a plurality of peaks generated by a single gesture in the signal of FIG. 6C through debounce of the PDA program automatic switching system using the acceleration sensor according to the present invention. Peaks appearing in the section (1) of FIG. 3 are ignored as a process for preventing the recognition of all the peaks generated by one gesture. 6D illustrates a signal in which a plurality of peaks are removed through the debouncing process of FIG. 3.

Table 1 compares an operation process of a mobile terminal such as a PDA using a gesture and an operation process using a stylus fan. The mobile terminal used in the comparison was the Compaq H3630 using the Windows CE 3.0 OS. The stylus fan control requires a small button to click using a pointing device, making it difficult to use when moving or driving, but gestures do not limit this. Although the reaction speed of the system is not compared in Table 1, the system reaction speed of the stylus pen control is slower because more processing is required for the stylus pen.

FIG. 7 is a diagram illustrating data obtained by examining the intensity of individual signals to 120 persons, and FIG. 8 is a diagram illustrating data examined by a gesture generation time.

To analyze the distribution of signal strength and time in tapping gestures, we averaged 12 or more gestures for each individual. The tap gesture is influenced by the location of the mobile terminal such as the PDA (indoor, outdoor) and the location of the mobile, but the data is collected by limiting the mobile terminal to the mouse.

As shown in FIG. 7, the strength of the signal for transmitting the tapping gesture to the mobile terminal is different for each individual, and most of the signals are distributed between 0.3g and 1.0g. In addition, the average intensity of males was larger than that of females, and the differences were large among individuals, while females had relatively even distribution. The average time to generate tapping gestures ranged from 0.2sec to 0.4sec, and both men and women showed even distribution.

9A to 9E illustrate a process of performing an operation of an automatic program switching system for a PDA according to the present invention.

9A to 9E, an execution program that is first performed among a plurality of execution programs is shown in FIG. 9A. The acceleration sensor 4 built in the PDA expansion pack 10 is connected to the back of the PDA 2 to detect the knocking 14. In FIG. 9B, when the user wants to switch to another execution program while performing a task, tap once with his hand. Then, the acceleration sensor detects this and transfers the signal 16 to PDA 2 to switch to the next execution program 18 as shown in FIG. 9C by using the execution program list stored in the memory. Similarly, FIG. 9C also shows a process in which the execution program 18 is switched as shown in FIG. 9D in the order of the execution program 18 stored in the memory when the hand is hit once.

This enables faster switching of the executable program 18 by tapping 14 by hand, without the need for the use of the stylus pen 8 when switching existing programs, and reducing the use of LCD6 and cumbersome stylus pen 8 on small PDAs. Can increase user efficiency.

Accelerometer 4 is not only applicable to this PDA2, but many other applications are possible in many other devices, and only one signal 16 is given to perform the current program switching function. You can apply another application to PDA 2 by giving it directly.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

The present invention as described above, by mounting an acceleration sensor in a mobile terminal, such as a PDA, by tapping the mobile terminal once to provide a function to detect the acceleration sensor to switch the execution program, thereby switching the previous execution program When the stylus pen touch can be eliminated the inconvenience of using a number of times, and can perform a quick operation can provide a lot of help to increase the efficiency.

Claims (2)

A program for automatic switching of PDA programs that includes an acceleration sensor capable of detecting a tapping signal in an expansion pack of a PDA and, in combination with the PDA, allows the user to switch between executable programs in sequence by tapping the PDA without the use of a stylus pen. In the PDA automatic program switching system using the acceleration sensor, As a process of removing the acceleration of gravity, the acceleration sensor mounted on the PDA includes a highpass filter that generates the acceleration of gravity according to the change of attitude of the PDA, Boundary filter to remove small signals that may occur in light movements, Execution program automatic switching system for a PDA comprising a debouncing to remove a number of peaks generated in one tapping signal.