CN101430617B - Accelerometer data processing method for controlling cursor movement and cursor control device - Google Patents

Abstract

The invention relates to an accelerometer data processing method for controlling cursor movement and a cursor control device, wherein the method comprises the steps of receiving and processing signals from an accelerometer in the cursor control device, filtering a high-frequency signal part higher than a cut-off frequency by using a low-pass filter, and adjusting the cut-off frequency according to the cursor movement speed, wherein the cursor movement speed is controlled by the angular position change rate of the display cursor control device. According to the control method for displaying the cursor, the operation is flexible, the cursor can be controlled without moving on a flat surface, the index can be controlled, the cursor can be controlled to move by different moving modes, the purpose of saving space is achieved, and meanwhile, the cursor can be simply and conveniently controlled by moving the wrist.

Description

Accelerometer data processing method and cursor control device for controlling cursor movement

technical field

The present invention relates to a display cursor control device, such as a computer mouse applied to a graphical user interface (GUI), in particular to an improved cursor control device, which uses a new accelerometer data processing method to control the movement of the cursor, in different Using different sensitivities in the cursor movement modes reduces noise and stabilizes cursor control to enhance multi-dimensional tilt angle control of the displayed cursor.

Background technique

Most traditional display cursor control devices use optical motion sensing or measure the movement of a rolling ball in order to operate, such as a computer mouse, such devices must usually be operated on a flat surface with sufficient space for the control device Moving, in addition, operating the control device is not conducive to ergonomics and sometimes causes injuries, such as hurting the nerves of the hands, arms or other parts of the body, or causing other more serious problems. In order to solve such problems and space constraints, Various cursor control devices have been developed, but these devices still have their limitations and difficulties in use, as described below.

In order to overcome the limitations of the conventional cursor control device, a sensory mouse can be used, or a radio frequency (RF) signal can be applied to the cursor control system. This type of device needs to add a special signal receiving device to the computer, which can be installed on the keyboard. Mounted on or around a monitor, such systems are expensive and complex to implement, so they cannot replace the traditional computer mouse as a more practical cursor control device.

With reference to other patents, some computer mice are made in the shape of a glove, so this cursor control system can be used off the desktop, and there is no need to install a signal receiving device on the computer. This type of cursor control device also has a ring style. Or they can put it on the finger to control the movement of the cursor, but when using these cursor control devices, the movement of the finger relative to the hand is completely different in the corresponding relationship between the coordinates and the cursor, so the market acceptance of this type of cursor control device The degree is not good.

There is also a gyroscope (gyroscopic) pointing (pointing) device in addition. The cursor control system has a gyroscope and uses the pointing of the mouse to control the cursor, but this type of mouse is large and heavy. cost of.

Patent Publication No. WO 0190877 discloses an image pointing control device using an accelerometer. The control device is tilted at different angles to control the cursor. In terms of tilting the mouse to different angles to control the movement of the cursor, a traditionally constructed computer mouse or It is more difficult for other image display devices to do such operations, and for image pointing devices with a flat bottom, the tilting operation usually requires a support structure, because such devices are difficult to control the cursor when suspended, so support is required Therefore, providing a support structure to this type of computer mouse can make the control cursor more stable, but the inconvenience and trouble caused by the support structure limit the practical application of this type of computer mouse or image pointing device.

Therefore, the industry is still in need of a cursor control and pointing system, which provides a novel and easy-to-use system that is compatible with current control and pointing devices, has low cost, and can solve the above-mentioned problems such as difficulty in use and operational limitations.

Contents of the invention

In order to overcome the defects of the prior art, the present invention provides a cursor control device, which is flexible in operation and does not need to be moved on a flat surface, especially when the control device is suspended in the air, it can also control the indicator, and can use different moving methods to control the movement of the cursor , in one embodiment, there is no need to move the control device horizontally, just tilting the control device to the right or left can directly move the cursor to the right or to the left, and similarly, the control device can also be tilted back and forth to control the cursor Moving up and down does not require horizontal movement of the control, as tilting does not require the mouse to be placed on a flat surface, saving space, while providing simple and convenient cursor control with only a wrist movement.

Another aspect of the present invention provides a cursor control device or a pointing device for pointing images, which has a curved bottom, such as an elliptical bottom, and the user of the device can easily tilt in various directions with only a slight movement of the hand or wrist. The device, to control the movement of a pointer or to control a displayed image, requires little space on a desk or other support surface, as long as it can support the contact area of the curved bottom. In fact, surface support is not necessary, since the cursor can be moved by tilting the control device, it is possible to place the control device on the surface of an object or lift it off the table without support.

Another aspect of the present invention provides an improved processing method for the detection results of the acceleration sensor. The processing method also considers the actual movement of the pointing device when it is on the table or suspended in the air. When there is an object surface that can support the device, this method uses Different sensitivities process the acceleration measurement results of different angular orientations to compensate for the difference in the degree of freedom of the wrist in different directions when the device is tilted. For example, the accelerometer measures the tilt angle in the vertical direction with a higher sensitivity to control the cursor up and down. While measuring the left and right tilt with lower sensitivity, control the cursor to move left and right.

Another aspect of the present invention provides an improved processing method for the detection results of the acceleration sensor, wherein the method uses different accelerations to adjust the sensitivity at different moving speeds, for example, when the cursor is moved at low speed or in the air, the acceleration is reduced The sensitivity of the measurement processing can improve the stability of the cursor movement to meet the user's needs. When the user moves the cursor or pointer at a relatively low speed, it is generally desirable to have a higher cursor stability.

Another aspect of the present invention provides an improved method for processing detection results of an acceleration sensor, wherein the method uses high measurement sensitivity and high-speed response to measure an inclination angle relative to a final level based on two-dimensional acceleration measurement results. In addition, the cursor control method can also use the three-dimensional movement of the measurement control device, and operate the cursor control device or the image pointing device by using tilt control movement. In addition, in order to enhance the convenience of control, a mouse pad with a curved surface can also be provided, and the user only needs to horizontally move the control device in different directions to produce a tilting movement effect.

Briefly, the present invention discloses a data processing system comprising a display cursor control device comprising: a low pass filter for filtering high frequencies above a cutoff frequency in a signal generated by an accelerometer frequency part signal, wherein the cut-off frequency depends on a display cursor moving speed, and the display cursor moving speed is controlled by an angular position change rate of the display cursor control device; and a microprocessor, if the microprocessor is obtained at The change of the angular position of the display cursor control device within a predetermined time is lower than a noise threshold, then a slow movement calculation is also performed to obtain the difference between the angular position along a predetermined direction and a reference angular position, if the If the difference is greater than a cursor movement threshold, even if the change of the angular position within the predetermined time is lower than the noise threshold, a signal is still generated to control the display cursor to move a distance of one pixel point along the predetermined direction.

The present invention also discloses a data processing system, which includes a display cursor control device, which is characterized in that the display cursor control device includes: a microprocessor for filtering out high frequencies higher than a cut-off frequency in a signal generated by an accelerometer Part of the signal, wherein the cutoff frequency depends on a display cursor moving speed controlled by an angular position change rate of the display cursor control device, if the microprocessor obtains the display cursor within a predetermined time The change in the angular position of the cursor control device is below a noise threshold, and a slow movement algorithm is also performed to obtain a difference between the angular position along a predetermined direction and a reference angular position, if the difference is greater than a cursor movement threshold , even if the change of the angular position within the predetermined time is lower than the noise threshold, a signal is still generated to control the display cursor to move along the predetermined direction by a distance of one pixel point.

The invention discloses a display cursor control device, which includes a low-pass filter, which can filter out the high-frequency signal higher than the cutoff frequency generated by the accelerometer, wherein the cutoff frequency depends on the moving speed of the cursor, and the moving speed of the cursor is controlled by the display cursor controlled by the rate of change of the angular position of the device; and a microprocessor for obtaining a change in the angular position of the display cursor control device within a predetermined time if the change in angular position within the predetermined time is below a noise threshold , then the microprocessor also executes a slow movement calculation to obtain the difference between the current angular position and a reference angular position along a predetermined direction, if the difference is greater than a cursor movement threshold, even within the predetermined time If the angular position change is lower than the noise threshold, the microprocessor still generates a signal to control the display cursor to move along the predetermined direction by a distance of one pixel point.

In one embodiment, the present invention discloses a method for controlling and displaying a cursor. The method includes the following steps: receiving and processing the signal generated by the accelerometer in the cursor control device, and filtering out the signal generated by the accelerometer by using a low-pass filter. Generate a high-frequency signal higher than the cut-off frequency, and adjust the cut-off frequency according to the cursor moving speed, which is controlled by the angular position change rate of the display cursor control device, when the angular position change rate within a predetermined time is obtained At a noise threshold, a slow movement calculation is also performed to obtain the difference between the angular position of the display cursor control device along a predetermined direction and a reference angular position, if the difference is greater than a cursor movement threshold, even If the change of the angular position within the predetermined time is lower than the noise threshold, a signal is still generated to control the display cursor to move along the predetermined direction by a distance of one pixel point.

According to the control method of the display cursor of the present invention, the operation can be made flexible, and the pointer can also be controlled without moving on a flat surface, and the movement of the cursor can be controlled by using different moving modes, so as to realize the purpose of saving space, and at the same time only need Cursor control is simple and convenient with the movement of the wrist.

The objects and advantages of the present invention can be clearly understood by referring to the accompanying drawings and the detailed description of the following related embodiments.

Description of drawings

1A to 1D are respectively a perspective view, a top view, a front view and a side view of a display cursor control device (ie, a mouse) of the present invention.

2A and 2B are schematic diagrams of a mouse pad with a curved surface. The user moves the mouse horizontally to generate a tilt angle to move a cursor or display an image pointing device.

3A and 3B are functional block diagrams illustrating the cursor control device or image pointing device of the present invention and the accelerometer therein.

FIG. 4 is a schematic diagram according to the present invention, wherein a data processing system (such as a personal computer) includes a display screen, the cursor of which is controlled by the display cursor control device shown in FIGS. 1 to 3 .

Wherein, the reference signs are explained as follows:

100 mouse

110 curved bottom

115-R, 115-L buttons

118 roller

120-1, 120-2 buttons

140 mouse pad

150-1, 150-2 accelerometer

155-1, 155-2 low pass filter

160-1, 160-2 Analog to Digital Converter

165 microprocessor

170 keys

175 computer interface

180 computers

185 RF Transmitter

190 RF Receiver

200 data processing system

210 display cursor control device

220 display screen

Detailed ways

Please refer to FIG. 1A to FIG. 1D, which are respectively a perspective view, a top view, a front view and a side view of the display indicator control device of the present invention. It is a mouse 100, and the display cursor control device has a curved bottom 110, which can easily change the mouse 100. The tilt angle of the mouse 100 shows that the cursor control device includes an accelerometer, which can sense the level change of the mouse 100 . The display cursor control device (such as a computer mouse) 100 has a curved bottom 110, or cooperates with a mouse pad 140 with a curved surface. If the mouse 100 or the mouse pad 140 is placed on the desktop, the mouse can be easily tilted to different positions. angle. Once the mouse is moved to a new tilt angle, the accelerometer can detect the level change and move the display cursor on the user GUI device (such as a computer screen) according to the level change. In addition, the design of the display cursor control device 100 also takes into account the following functions.

As shown in Fig. 1A to Fig. 1D, the width along the Y axis is called the length along the X axis, and the human wrist can move somewhat differently in different directions. For example, when the mouse 100 is placed on the desktop, the wrist The degree of freedom of tilting left and right is greater than that of tilting up and down. In order to compensate for this difference, the mouse 100 is designed to have a narrower width W and a longer length L, that is, L>W, so that the mouse 100 can be moved along the X direction. The inclined movement is more convenient. In addition, the accelerometer is designed so that the measurement sensitivity of the inclination of the mouse 100 in the X direction is higher than that in the Y direction, so that the user can achieve a better cursor control effect by tilting the mouse 100. Therefore, along the vertical direction, if the same inclination angle θ , will produce a larger movement relative to the Y axis than relative to the X axis.

In addition to conventional control parts such as the traditional right button 115-R, left button 115-L, and scroll wheel 118, the mouse 100 of the present invention also includes two side buttons 120-1 and 120-2, and the button 120-1 It is used to adjust the table/suspension operation mode, and the operation mode of the mouse can be changed to the table operation mode or the suspension operation mode. When the mouse 100 is operated in the air, the cursor control sensitivity is reduced. In addition, a weight sensor (not shown) can be installed at the bottom of the mouse 100 to replace the button 120-1, and the weight sensing operation at the bottom of the mouse 100 can be used to change the operation mode to a desktop operation mode or a floating operation mode. The button 120-2 can adjust the use/waiting mode. When the button 120-2 is pressed to enter the use mode, the tilt angle of the mouse 100 will be used to control the movement of the cursor. If the button 120-2 is released (or opened), it will enter the waiting mode. mode, the position of the cursor will not be changed even if the mouse 100 is moved. The mouse 100 can also provide a double waiting situation. If the mouse 100 does not move for a certain period of time, in order to save power, the power of the mouse 100 is turned off. In addition, a function can also be provided, if the left button 115-L and the right button 115-R are continuously pressed, the display cursor will be moved to the center of the display device.

In addition to the aforementioned mouse having a curved bottom, FIG. 2A and FIG. 2B show another embodiment, wherein the mouse pad 140 has a curved surface. When the user uses the mouse 100 on the mouse pad 140, an inclined angle will be generated to move the cursor. .

FIG. 3A shows a functional block diagram of a cursor control device. The cursor control device can be a computer mouse 100, which uses two accelerometers to sense the tilting motion of the mouse 100 to control the movement of the cursor. The cursor control device includes a first accelerometer 150-1 and a second accelerometer 150-1. Two accelerometers 150-2 detect accelerations in two directions respectively, such as accelerations along the X-direction and Y-direction, and the detected acceleration signals are sent to the first low-pass filter 155-1 and the second low-pass filter 155-1 respectively The filter 155-2 filters out certain high-frequency noises, and then transmits the filtered signal to a first analog-to-digital converter (analog-to-digital converter, ADC) 160-1 and a second analog-to-digital converter 160-2, After the analog signal is converted into a digital signal, it is input to the microprocessor 165, and the microprocessor 165 can additionally receive the input signal from the button 170 of the mouse 100, and the button 170 can be a button 115-R, 115-L, 120-1, 120- 2. Microprocessor 165 additionally receives the signal produced by roller 118 and the roller encoder that processes the action of roller 118. Microprocessor 165 performs signal processing. This part will be explained later, and then the generated signal is output to The computer 180, according to the change of the tilt angle of the mouse 100 detected by the accelerometers 150-1 and 150-2, the computer interface 175 generates a plurality of digital data representing the movement of the cursor.

Fig. 3B shows the functional block diagram of wireless mouse, and its structure is similar to the mouse of Fig. 3A, and only difference is that wireless mouse comprises a radio frequency transmitter 185, can transmit cursor movement signal to computer 180 with radio frequency receiver 190, radio frequency receiver 190 may receive signals from radio frequency transmitter 185 .

Microprocessor 165 performs some processing functions for the digital data received from the analog-to-digital converter. In order to control the display cursor of computer 180, an initialization program is executed to initialize multiple parameters. After the initialization program, microprocessor 165 acts as a low-pass The filter generally performs the main task and processes the digital data according to the predicted situation. Different predicted situations are: 1) the mouse is still and not moving; 2) the mouse is moving slowly; 3) the mouse is moving at a medium speed; 4) the mouse is moving rapidly. The accelerometer detects the mouse movement, and the digital filter predicts its condition based on the result to perform digital signal processing functions to achieve stable and accurate cursor control. The data filtering procedure will be described in detail below.

The software program that controls the mouse movement is mainly divided into five parts. The first part performs the function of setting the initial value of the parameter; the second part of the program calculates the current angular position; the third part of the program performs the function of calculating the cursor displacement. The angular difference between the position and the angular position 10 milliseconds ago is used to obtain the displacement; the fourth part of the program handles the slow movement of the mouse; finally, the fifth part of the program is responsible for outputting the cursor movement data to the computer.

Theoretically, as long as the accelerometer measures the data, the measured data can be used to calculate the correct angular position of the mouse, but because the user may shake the mouse when holding the mouse, or have a small but irregular movement, the actual The angular position of the mouse cannot be calculated correctly, and the measurement signal filtered by the low-pass filter still has residual noise, which will form interference and cause the value of the angular position to continuously change, so the calculated angular position value cannot be directly applied to the control The cursor moves. Noise or slight movement of the hand makes the cursor move continuously, and its position on the display screen changes irregularly and uncontrollably. When the control cursor moves quickly from one point on the display screen to another point at a considerable distance, this The uncontrollable or sudden change of the cursor position is usually not obvious, but when the cursor is moved at a low speed, this uncontrollable "cursor drift" phenomenon is quite obvious, sometimes even if the mouse remains in a fixed position and does not move. An annoying cursor drifting phenomenon. To overcome this problem, some parameters of the filter can be modified to filter out the higher frequency part of the accelerometer measurement signal, and some parameters can be modified to achieve the effect. To simplify the description, the low-pass filter in the following example will use a lower cut-off (cut-off) frequency, lowering the cut-off frequency can indeed overcome this problem, but lowering the cut-off frequency will cause other effects, such as reducing the sensitivity of sensing mouse movement, making the cursor more sluggish and unable to keep up with the movement of the mouse. The invention adds some control rules to avoid this problem. If the cursor is controlled to move slowly, it needs to have high stability and controllability. On the contrary, if the cursor is controlled to move quickly or move a considerable distance , the responsiveness of the cursor to the movement of the mouse is more important, but stability and controllability become less important, so the low-pass filter of the present invention will adjust the cutoff frequency according to the speed of the cursor movement, for example, if the change speed of the angular position If the cutoff frequency is very small, the cutoff frequency will be lowered. A lower cutoff frequency will reduce the high-frequency signal and increase the stability and controllability of the cursor; on the contrary, if the change speed of the angular position is very large and the cursor moves quickly, then increase the cutoff frequency. Frequency, this will increase the high-frequency signal part, and the cursor will have a faster response to mouse movement. Increasing the cut-off frequency will bring more high-frequency noise, making the cursor move unstable, but if it is controlled When the cursor moves quickly, there is no need to worry too much about the slight "drifting" of the cursor, because the user is not controlling the cursor to point and keep it at a fixed position, but mainly to make the cursor move from one point on the display screen to the other. Location moved to another location.

In one embodiment of the present invention, a 100Hz low-pass filter is selected to be placed after the accelerometer to filter out signals above 100Hz in hardware. In the present invention, a special software low-pass filter is further utilized, wherein The cut-off frequency depends on the speed of the mouse movement. Adjust the cut-off frequency according to the angular orientation change rate of the accelerometer measurement results. The software low-pass filter executes the program every 10 milliseconds. Using the accelerometer measurement results, first obtain the The angular position of the mouse changes, and the mouse movement speed is calculated. In a special case, when the mouse moves very slowly, the operation of the mouse may be interrupted several times. Judging the movement speed of the mouse cannot only be based on the 10 milliseconds from the beginning to the end. The angular difference between the two points must also calculate the average velocity within several 10 millisecond time intervals, and take these continuous angular position changes into consideration to calculate the average mouse movement velocity.

For convenience, the operation of processing accelerometer measurement results is divided into four states, which are (1) static state, the mouse stays in one position without moving; (2) the mouse moves at a low speed; (3) the mouse moves at a medium speed; and ( 4) The mouse moves at high speed. Different low-pass filter parameters are used for these four states.

The software filter executes the calculation program, first calculates the current angular position, and compares it with the angular position 10 milliseconds ago, and estimates the angular displacement according to the following rules: if the angular displacement is less than a predetermined value A, the difference is regarded as noise, and there is no need to move the cursor ;If the angular displacement is greater than a predetermined value A and smaller than another predetermined value B, multiply the angular displacement by the α value to generate a cursor movement value; if the angular displacement is greater than a predetermined value B and smaller than another predetermined value C, set the angular displacement greater than a predetermined value The part of B is multiplied by the β value, the other part is multiplied by the α value, and the two are added to generate the cursor movement value. In this way, when the moving speed of the mouse gradually increases, the multiplication factor will gradually increase to increase its weight, which can enhance the responsiveness of the cursor to the moving of the mouse. The speed-dependent low-pass filter and the accumulation procedure for calculating the cursor movement value are both for the same purpose, which is to handle irregular slight movements of the user's hand with less sensitivity, the cursor reacts less to slight movements of the mouse, This can increase the stability of the cursor when moving slowly, and help the user to point and control the cursor at a fixed position, and the cursor can have higher stability and controllability when moving slowly. Conversely, if the mouse is moved faster than the predetermined speed, the responsiveness of the cursor to the mouse movement should be improved, and this effect can be achieved by adding a larger weight factor when calculating the cursor movement.

The above accumulation method has a limitation. If the user moves the mouse at a very slow speed, even if the tilt angle of the mouse is already large, but the angular displacement change within 10 milliseconds is lower than the minimum predetermined value A, the cursor will remain fixed. , so apply a slow movement calculation rule to deal with this "micro-motion" situation, when executing the micro-motion processing program, calculate the current angular displacement, and judge whether the angular displacement along the X-axis direction is less than the minimum predetermined value A, if along The angular displacement in the X direction is less than the minimum predetermined value A, notify the cursor not to move, and compare the current angular position in the X-axis direction with the reference angular position, if the difference between the two is greater than the slow movement threshold, then control the cursor along the X-axis direction Move a primitive point and redefine the reference angle position as the current corner position. The above calculation rules can also be applied to the movement in the Y-axis direction. The advantage of this method is that it is convenient for the user to move the cursor one primitive point at a time. Then Slowly tilting the mouse also properly controls slow cursor movement.

Please refer to FIG. 4. FIG. 4 is a schematic diagram according to a specific embodiment of the present invention, illustrating the control operation performed by the microprocessor 165, processing the signals sent by the accelerometers 150-1 and 150-2 and passing through the communication module (radio frequency receiver) 190 is output to the computer, and the control program first initializes all operating parameters, including the cut-off frequency of the aforementioned software low-pass filter. After initializing the parameters, the current angular position of the mouse is calculated.

According to the embodiments and descriptions of FIGS. 1 to 3, the present invention discloses a data processing system 200 as shown in FIG. The control device illustrated in FIG. 3 shows that the cursor control device 210 also includes a low-pass filter, which can filter out the part of the signal output by the accelerometer that is higher than the cut-off frequency, wherein the cut-off frequency depends on the moving speed of the cursor, and the moving speed of the cursor is determined by It is controlled by the rate of change of the angular position of the display cursor control device. In one embodiment, the data processing system 200 can be a personal computer (FIG. 4). The personal computer 200 is connected to the display cursor control device 210 to receive its signal and control the movement of the cursor. . In another embodiment, the display cursor control device further includes a housing having a curved bottom so that the display cursor control device can be easily tilted to change the level of the accelerometer within the housing. In another embodiment, the display cursor device further includes a microprocessor for realizing the low-pass filter. In another embodiment, the display cursor control device further includes a wireless signal transmitter for outputting the display cursor control signal to the data processing system. In another embodiment, the low-pass filter of the display cursor control device adjusts the cutoff frequency according to the rate of change of the angular position of the display cursor control device. stability and controllability. In another embodiment, the low-pass filter of the display cursor control device adjusts the cutoff frequency according to the rate of change of the angular position of the display cursor control device. ability to respond. In another embodiment, the display cursor control device further includes a microprocessor, which can repeatedly execute the angular position calculation program every predetermined time to obtain the angular position change within the predetermined time, so as to obtain the display cursor control device The angular position change rate of . In another embodiment, the microprocessor can repeatedly execute the angular position calculation program within a predetermined time of about 10 milliseconds to obtain the angular position change of the display cursor control device. In another embodiment, when the rate of change of the angular position in the latest time interval is lower than a predetermined value, it is predicted that the display cursor control device has intermittent interruption when moving at a slow speed, and the microprocessor obtains the number of time intervals The average angular position change rate of . In another embodiment, if the microprocessor determines that the angular position change within the predetermined time is lower than the noise threshold, the microprocessor further generates a signal for controlling the display cursor so that the display cursor is fixed at the original position. In another embodiment, the microprocessor further generates a signal for controlling the display cursor so that the moving speed of the cursor is multiplied by a weighting factor corresponding to the rate of change of the angular position by multiplying the angular velocity change rate of the display cursor control device. In another embodiment, the processor calculates the proportion factor corresponding to the rate of change of the angular position, and first divides the rate of change of the angular position into several speed ranges, and a higher speed range corresponds to a larger weight factor, and each speed range The rate of change of the angular position within is multiplied by the corresponding weighting factor, so the display cursor has better responsiveness in the high-speed range and higher stability in the low-speed range. In another embodiment, if the microprocessor judges that the angular position change within the predetermined time is lower than the noise threshold, the microprocessor will perform a slow movement calculation to obtain the current angular position and the reference angular position in a specific direction If the difference is greater than the cursor movement threshold, even if the angular position change within the predetermined time is lower than the noise threshold, the microprocessor will generate a signal to make the display cursor move the distance of one pixel point along the specific direction. In another embodiment, the microprocessor executes the slow movement calculation in the X-axis direction. In another embodiment, the microprocessor executes the slow movement calculation in the Y-axis direction. In another embodiment, the display cursor control device further includes a casing forming a completely sealed casing, substantially waterproof and dustproof. In another embodiment, the display cursor control device controls cursor movement of the data processing system by tilting different angular positions, and can be used on a support surface or in the air. In another embodiment, the display cursor control device further includes a housing with an elliptical shape that can be easily tilted to different angular positions. In another embodiment, the display cursor control device further includes a first accelerometer and a second accelerometer, respectively measuring the tilt angles along the first direction and the second direction perpendicular to each other, using two different cursor response parameters The movement of the cursor in the first direction and the second direction is controlled.

Although the present invention is described through the above-mentioned preferred embodiment, it does not mean that the present invention is limited to this embodiment, and those skilled in the art can change and modify according to the above-mentioned description, without breaking away from the protection determined by the appended claims The scope and spirit of the scope.

Claims (12)

1. a data handling system comprises a display cursor control device, it is characterized in that this display cursor control device comprises:

One low-pass filter, be used for the HFS signal that filtering one signal that accelerometer produces is higher than a cutoff frequency, wherein this cutoff frequency depends on a display highlighting translational speed, and this display highlighting translational speed is controlled by one jiao of position rate of this display cursor control device then; And

One microprocessor, if this display cursor control device angle position change that this microprocessor was tried to achieve in a schedule time is lower than a noise threshold, then also carry out one and move calculation at a slow speed, try to achieve along the position, angle of a predetermined direction and the difference between a reference angular position, if this difference moves threshold value greater than a cursor, even should be lower than this noise threshold by this angle position change in the schedule time, still produce this display highlighting of a signal controlling moves a pel point along this predetermined direction distance.

2. data handling system as claimed in claim 1 is characterized in that this display cursor control device also comprises:

One housing, has a curved bottom, this display cursor control device easily can tilt, change the levelness of the accelerometer in this housing, this display cursor control device is by the different position, angle that tilts, this display highlighting of controlling this data handling system moves, and can use on stayed surface or unsettled use; And

One radio transmitters is used to transmit the display highlighting control signal and gives this data handling system.

3. data handling system as claimed in claim 1, this low-pass filter that it is characterized in that this display cursor control device is adjusted this cutoff frequency according to this angle position rate of this display cursor control device, if this angle position rate reduces, then reduce this cutoff frequency, to increase stability and the controllability of this display highlighting when low speed moves, if this angle position rate increases, then improve this cutoff frequency, to increase the reaction capacity of this display highlighting when the high-speed mobile.

4. data handling system as claimed in claim 1, it is characterized in that this microprocessor repeats one jiao of position calculation program every a schedule time, try to achieve this angle position change in this schedule time, this angle position rate in the hope of this display cursor control device, this schedule time is 10 milliseconds, this microprocessor repeats this angle position calculation program every this schedule time, in the hope of the angle position change of this display cursor control device.

5. data handling system as claimed in claim 4, it is characterized in that if the angle position rate in the nearest time interval is lower than a predetermined value, predict this display cursor control device in slow have when mobile intermittently pause, this microprocessor is also tried to achieve the average angle position rate in a plurality of these predetermined time intervals.

6. data handling system as claimed in claim 4 is characterized in that it is motionless in anchored in place then to produce this display highlighting of a signal controlling if the angle position change that this microprocessor is tried to achieve in this predetermined time interval is lower than a noise threshold.

7. data handling system as claimed in claim 6 is characterized in that this microprocessor carries out this and moves calculation at a slow speed on X-direction and/or Y direction.

8. data handling system as claimed in claim 4, it is characterized in that this microprocessor produces the translational speed of this this display highlighting of signal controlling, this translational speed is multiplied by a weight factor for this angle position rate of this display cursor control device, and this weight factor is then corresponding to this angle position rate.

9. data handling system as claimed in claim 8, it is characterized in that this microprocessor calculates this weight factor that should the angle position rate, at first the angle position rate is distinguished into a plurality of velocity ranges, the weight factor that fair speed scope correspondence is bigger, angle position rate in the velocity range is multiplied by corresponding weight factor, then this display highlighting has reaction capacity preferably in a higher speed scope, advantages of higher stability is arranged one in than low-speed range.

10. data handling system as claimed in claim 1 is characterized in that this display cursor control device also comprises:

First acceleration is taken into account second accelerometer, measure the angle of inclination on mutually perpendicular first direction and the second direction respectively, wherein utilize two different cursors to reply parameter and measure angle of inclination on this first direction and this second direction respectively, control this display highlighting moving in this first direction and this second direction.

11. a display cursor control device is characterized in that this display cursor control device comprises:

One low-pass filter, be used for the HFS signal that filtering one signal that accelerometer produces is higher than a cutoff frequency, wherein this cutoff frequency depends on a display highlighting translational speed, and this display highlighting translational speed is controlled by the angle position rate of this display cursor control device then; And

One microprocessor, be used to try to achieve the angle position change of this display cursor control device in a schedule time, if should be lower than a noise threshold by this angle position change in the schedule time, then this microprocessor is also carried out one and is moved calculation at a slow speed, try to achieve along the position, present angle of a predetermined direction and the difference between a reference angular position, if this difference moves threshold value greater than a cursor, even should be lower than this noise threshold by this angle position change in the schedule time, this microprocessor still produces this display highlighting of a signal controlling moves a pel point along this predetermined direction distance.

12. a display highlighting control method is characterized in that comprising the following steps:

Receive the signal that accelerometer produced in the display cursor control device;

Utilize the high-frequency signal part that is higher than a cutoff frequency in this signal of a low pass filter filters out;

Adjust this cutoff frequency according to cursor moving speed, cursor moving speed is controlled by the angle position rate of this display cursor control device then; And

When trying to achieve one jiao of position change in a schedule time when being lower than a noise threshold, also carry out one and move calculation at a slow speed, try to achieve this display cursor control device along the position, angle of a predetermined direction and the difference between a reference angular position, if this difference moves threshold value greater than a cursor, even should be lower than this noise threshold by this angle position change in the schedule time, still produce this display highlighting of a signal controlling moves a pel point along this predetermined direction distance.

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