TWI394066B - Pointing device - Google Patents

Description

Pointing device

The present invention relates to a pointing device, and more particularly to a method for calculating a motion value by sensing a motion change of an object and an apparatus for tracking a moving position of the object based on the motion value.

Generally, the type of the pointing device includes an optical pointing device, a mechanical pointing device, a human interface device using a human body, and the like. A representative example of an optical pointing device is an optical mouse, a representative example of a mechanical pointing device is a ball mouse, and a representative example of a human interface device is a touch screen.

In an optical mouse, light radiated from a light source is reflected from an object and sensed by an image sensor. The detected data is used to configure the image of the object. The images configured in multiple time periods are compared. The direction and distance of the movement are calculated by tracking the movement of the object.

In the ball mouse, the direction and distance of the movement are calculated from the rotational distance and direction of the rotating ball.

The (resistive) touch screen detects the position when a finger pressure is applied by mounting a pressure sensitive sensor line on the screen surface, and calculates the moving direction and distance by tracking the moving path.

1 is a block diagram showing an example of a conventional optical pointing device using an image sensor. The object 10, the optical pointing device 11 and the control device 21 are illustrated in FIG. The optical pointing device 11 includes a sensor 13, a motion value calculator 14, and an interface 15. The control device 21 includes an interface 22, an application unit 23, and an output unit 24.

The operation of the conventional optical pointing device of FIG. 1 using an image sensor will be described.

The sensor 13 generates an analog signal based on the amount of light by receiving light reflected from the object 10 using an image sensor (not shown).

The motion value calculator 14 includes an analog-to-digital (A/D) converter (not shown), an input box memory (not shown), a reference frame memory (not shown), and an image processor (not shown). Show).

The A/D converter converts the analog signal received from the sensor 13 into a digital signal. The input box memory stores the digital signal output from the A/D converter. The reference frame memory stores the previous frame data before the current frame data. The image processor calculates and outputs a motion value Vg by receiving and comparing the reference frame data from the reference frame memory with the current frame data from the input box memory.

The interface 15 of the optical pointing device 11 receives the motion value Vg from the motion value calculator 14 and transmits the received motion value Vg to an external control device (e.g., a computer).

The interface 22 of the control device 21 receives the motion value Vg from the optical pointing device 11.

The application unit 23 receives the motion value Vg from the interface 22 of the control device 21, and outputs the motion value Vg directly to the output unit 24. Application unit 23 may include a memory that stores an application.

The output unit 24 outputs the motion value Vg input from the application unit 23 to a monitor (not shown) so that the user can read the motion value Vg.

2A is a diagram for explaining an image mapping method of the motion value calculator 14 of FIG. 1, and illustrates a method for comparing the reference frame data 31 with the input box data 32.

An image mapping method for calculating the motion value Vg from an image of an object will be described with reference to FIG. 2A.

The reference frame data 31 is image data of a step preceding the input box data 32 in the current step, and is stored in the reference frame memory. A part of the reference frame data 31 is set as mask window data 38. The input box data 32 used as the image data in the current step is stored in the input box memory.

The mask window data 38 of the reference frame data 31 is compared with the input box data 32 in the mask window unit. The mask window data 38 is moved pixel by pixel on the entire input box data and compared with the input box data to calculate a correlation value. That is, the correlation value is calculated by comparing the mask window data 38 of the reference frame data 31 with the first region of the input box data 32. After shifting by one pixel, the correlation value is calculated by comparison with the second region of the input box data 32. This process is repeated until the Nth region of the frame data 32 is input. The motion value Vg with respect to the X and Y axes is generated with respect to the position where the correlation value is the largest, and the motion value Vg is transmitted to the control device 21 via the interface 15.

2B is a graph showing an operational region of a conventional optical pointing device. In FIG. 2B, an actual motion profile 36 and a motion value plot 37 are depicted.

The actual motion profile 36 represents the motion of the object as the X-axis and Y-axis displacements in the X-Y coordinate system. The motion value graph 37 represents the motion value calculated by sensing the image of the motion of the object using the optical pointing device 11 of Fig. 1 in the X-Y coordinate system.

As shown in the actual motion graph 36 and the motion value graph 37 of FIG. 2B, when the motion value calculation method of the conventional optical pointing device is used, the object The actual motion is the same as that calculated by conventional optical pointing devices.

The above motion value calculation method may be advantageous in a mouse (a type of pointing device) and may be disadvantageous in a mobile phone using a touch screen (another type of pointing device). For example, when using a mobile phone equipped with a touch screen, the user's thumb may unintentionally shift the pointer of the touch screen while holding the mobile phone in the hand. In order to move the pointer horizontally on the touch screen of the mobile phone, the finger in contact with the touch screen should move horizontally, but this is difficult because the finger usually moves at an angle. Thus, the pointer may not move as the user wishes, and the user's thumb may feel tired.

The present invention provides a pointing device that can limit the angle of motion when generating an output of motion values.

The present invention also provides a method for calculating a motion value of a pointing device that can limit a motion angle.

According to an aspect of the present invention, a pointing device is provided, comprising: a sensor that generates a motion detection signal by sensing motion; a calculator that receives a motion detection signal, and calculates a motion value based on the motion detection signal, Calculating a converted motion value based on the angle of the motion value, and outputting a transform motion; and an interface that outputs a converted motion value input from the calculator.

The sensor may include an image sensor that receives light reflected from the object and outputs a motion detection signal corresponding to the amount of received light.

The sensor may include: a lower electrode disposed on a lower side; a movable upper electrode disposed on the upper side and having a capacitance value with respect to the lower electrode; and a capacitance sensor that outputs the capacitance value as a motion detection signal The capacitance value A change occurs when the upper electrode moves in response to a user's control motion.

The capacitive sensor can be coupled to a drawbar handle that is moveable by a user and that can be coupled to an elastomeric material, wherein the upper electrode can be located at a central location of the lower electrode when no force is applied.

The calculator may include: a motion value calculator that receives the motion detection signal, calculates a motion value by comparing the current motion detection signal with the previous motion detection signal, and outputs the motion value; and converts the motion value calculator to receive The motion value, the converted motion value is calculated based on the angle of the motion value, and the converted motion value is output.

The motion value calculator may include an analog-to-digital (A/D) converter that receives the motion detection signal and converts it into a digital signal; a memory that receives and stores the current digital signal output from the A/D converter and the previous a digital signal; and an image processor that receives the current digital signal and the previous digital signal from the memory, calculates a motion value by comparing the current digital signal with a previous digital signal, and outputs the motion value.

The converted motion value calculator may include: a motion direction calculation module that divides an angle of 360 degrees into a plurality of angular regions, sets a representative angle of each region, and calculates an angle of the motion value based on the representative angle Calculating a converted motion direction value, and outputting the converted motion direction value; the motion amplitude calculation module receives the motion value, calculates a horizontal component and a vertical component of the motion value, and calculates the horizontal component and/or the vertical component by modifying Converting a motion amplitude value and outputting the converted motion amplitude value; and outputting a control module that outputs the converted motion value by combining the converted motion direction value and the converted motion amplitude value.

Motion direction calculation mode when the angle of the motion value is in the lag angle region The group can set the previous transition motion direction value to the transition motion direction value.

The motion amplitude calculation module may additionally receive the converted motion direction value, and calculate the magnitude of the motion value, and modify the horizontal component and/or the vertical component to coordinate the amplitude of the coordinate of the motion direction value closest to the motion value. The weight of the.

The motion amplitude calculation module may additionally receive the converted motion direction value and modify the horizontal component and/or the vertical component to respectively be the components of the coordinates of the coordinate corresponding to the motion value among the coordinates of the converted motion direction value.

When there are two coordinates closest to the coordinates corresponding to the motion value, the motion amplitude calculation module may select a coordinate that is close to the coordinate corresponding to the previously converted motion value, and modify the horizontal component and/or the vertical component to be selected respectively. The weight of the coordinates.

The motion amplitude calculation module can calculate the converted motion amplitude value by reducing the horizontal component and/or increasing the vertical component.

The pointing device may further include: a motion amplitude calculation module that receives the converted motion value from the calculator and performs an operation for adjusting a horizontal component of the converted motion value to be smaller than a vertical component and for adjusting a vertical component to be smaller than a level At least one of the operations of the component then outputs the converted motion value to the interface.

According to another aspect of the present invention, a pointing device is provided, comprising: a sensor that generates a motion detection signal by sensing motion; a calculator that receives a motion detection signal, and calculates a motion value based on the motion detection signal Calculating a converted motion value based on the motion value, and outputting the converted motion value; and an interface that outputs a converted motion value input from the calculator.

The calculator may include: a motion value calculator that receives the motion detection signal, Calculating a motion value by comparing a current motion detection signal with a previous motion detection signal, and outputting the motion value; and converting a motion value calculator that receives the motion value, calculates a horizontal component and a vertical component of the motion value, by modifying the level The component and/or vertical components are used to calculate a converted motion value and output the converted motion value.

The converted motion value calculator can calculate the converted motion value by reducing the horizontal component and/or increasing the vertical component.

According to still another aspect of the present invention, a pointing device is provided, comprising: an interface that receives a motion value from a device that outputs a motion value, and outputs the motion value; and an application unit that receives the motion value from the interface and calculates the motion value An angle, a converted motion value is calculated based on the angle of the motion value, and the converted motion value is output; and an output unit receives the converted motion value from the application unit and outputs a video signal corresponding thereto.

The application unit may divide the 360 degree angle into a plurality of angular regions, set a representative angle of each region, calculate a converted motion direction value based on the representative angle by calculating an angle of the motion value, and calculate the motion. a horizontal component and a vertical component of the value, the converted motion amplitude value is calculated by modifying the horizontal component and/or the vertical component by referring to the converted motion direction value, and outputting the converted motion direction value by combining the converted motion direction value and the converted motion amplitude value Convert the motion value.

The application unit may output the converted motion value after reducing the horizontal component of the converted motion value and/or increasing the vertical component of the converted motion value.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Hereinafter, a motion value calculation method and a pointing device using the same according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of a pointing device in accordance with a first exemplary embodiment of the present invention. In FIG. 3, an object 110 and a pointing device 111 are illustrated. The pointing device 111 includes a sensor 113, a calculator 116, and an interface 115. The calculator 116 includes a motion value calculator 114 and a converted motion value calculator 112.

The operation of the optical pointing device of Fig. 3 will be described.

The sensor 113 receives light reflected from the object 110 and generates an analog signal based on the amount of light reflected from the object 110.

The calculator 116 includes a motion value calculator 114 for receiving an analog signal from the sensor 113 and outputting a motion value Vg, and a converted motion value calculator 112 for receiving the motion value Vg from the motion value calculator 114. And outputting a converted motion value Vm based on the angle and amplitude of the motion value Vg.

The motion value calculator 114 includes an A/D converter (not shown), an input box memory (not shown), a reference frame memory (not shown), and an image processor (not shown).

The A/D converter converts the analog signal received from the sensor 113 into a digital signal. The input box memory stores the digital signal output from the A/D converter as the current frame data. The reference frame memory stores the previous frame data before the current frame data as the reference frame data. The image processor receives the reference frame data from the reference frame memory and the current frame data from the input box memory, and calculates a motion value Vg by comparing the reference frame data with the current frame data, and outputs the motion value Vg.

The converted motion value calculator 112 receives the motion value from the motion value calculator 114. Vg, calculating a converted motion direction value by calculating an angle of the motion value Vg, and calculating a converted motion amplitude value by changing an amplitude of the motion value Vg, and outputting one by combining the converted motion direction value and the converted motion amplitude value Convert the motion value Vm.

The interface 115 receives the converted motion value Vm from the converted motion value calculator 112 and transmits the converted motion value Vm to an external control device (not shown; for example, a computer).

4 is a block diagram of a converted motion value calculator of a pointing device, in accordance with an exemplary embodiment of the present invention. The converted motion value calculator 112 includes a motion direction calculation module 222, a motion amplitude calculation module 225, and an output control module 224.

The operation of the converted motion value calculator 112 of FIG. 4 will be described with reference to FIG.

The motion direction calculation module 222 receives the motion value Vg output from the motion value calculator 114, calculates the angle of the motion value Vg, and calculates the converted motion direction value Vg-d in four or eight directions by limiting the angle of the motion value Vg. And outputting the converted motion direction value Vg-d.

The motion amplitude calculation module 225 receives the motion value Vg from the motion value calculator 114, calculates the X-axis or Y-axis value of the motion value Vg, calculates a converted motion amplitude value Vg-m by changing the X-axis or Y-axis value, and outputs The converted motion amplitude value is Vg-m. The motion magnitude calculation module 225 can additionally receive the converted motion direction value Vg-d from the motion direction calculation module 222.

The output control module 224 outputs the converted motion value Vm by receiving and combining the converted motion direction value Vg-d output from the motion direction calculation module 222 and the converted motion amplitude value Vg-m output from the motion amplitude calculation module 225.

Alternatively, the motion magnitude calculation module 225 can receive the slave motion direction meter Calculating the converted motion direction value Vg-d output by the module 222, and combining the converted motion direction value Vg-d with the converted motion amplitude value Vg-m calculated by the motion amplitude calculation module 225 to output the converted motion Value Vm. Alternatively, the motion magnitude calculation module 225 can be external to the converted motion value calculator 112 and can receive the converted motion value Vm and change its amplitude. Alternatively, the converted motion value calculator 112 may be located inside the motion value calculator 114.

FIG. 5 is a graph illustrating a motion direction calculation method of a converted motion value calculator, according to an exemplary embodiment of the present invention. In FIG. 5, an angle graph 131 and graphs 132 through 134 are illustrated.

The motion direction calculation method of FIG. 5 will be described with reference to FIG.

In the angle graph 131, the angle of the X-Y coordinate system is divided into 45° segments. Set 337.5°~22.5° to R1 with a central angle of 0° (hereinafter referred to as R1(0°)) and 22.5° to 67.5° to R2 with a central angle of 45° (hereinafter referred to as R2 (45). °)), set 67.5°~112.5° to R3 with a central angle of 90° (hereinafter referred to as R3 (90°)), and set 112.5° to 157.5° to R4 with a central angle of 135° (hereinafter referred to as For R4 (135°)), set 157.5°~202.5° to R5 with a central angle of 180° (hereinafter referred to as R5 (180°)), and set 202.5°~247.5° to R6 with a central angle of 225°. (hereinafter referred to as R6 (225°)), 247.5° to 292.5° is set as R7 with a central angle of 270° (hereinafter referred to as R7 (270°)), and 292.5° to 337.5° is set as a central angle. It is R8 of 315° (hereinafter referred to as R8 (315°)). Set the center angle of R1 to R8 to a representative angle.

In the graphs 132 to 134, the motion value graph 132 represents the motion value output from the motion value calculator 114, and the angle map graph 133 represents the angle of the motion value mapped to the motion value graph 132 using the angle graph 131, and The angle conversion graph 134 represents a representative angle of R1 to R8 of the angle graph 131, which is used to replace the angle of the angle map graph 133. The angle of the motion value mapped to the motion value graph 132 can be calculated by the following equation: θ = arctan( dy / dx ).

In the motion direction calculation method described with reference to FIG. 5, the converted motion value calculator 112 receives the motion value Vg output from the motion value calculator 114 of FIG. 3, and calculates the angle of the motion value Vg with respect to the origin (0°). A conversion direction value is calculated by replacing the angle with a representative angle of R1 to R8.

In the motion direction calculation method of FIG. 5, in order to convert the angle of the motion value Vg into a representative angle of R1 to R8, a problem may arise when the angle of the motion value Vg is located at a boundary between the two of R1 to R8 .

For example, when the angle of the motion value corresponds to an angle of 22.5°, it can be mapped to R1 (0°) of 337.5° to 22.5° or R2 (45°) of 22.5° to 67.5°. At an angle of ±5° near the boundary, the value of the transition motion direction may be unstable due to a sharp change between R1 (0°) and R2 (45°).

In order to stably calculate the converted motion direction value located near the boundary as described above, the converted motion direction value may be calculated by setting a hysteresis region near the boundary or calculating an average value of the converted motion direction values for a given time.

Now, a method of using a hysteresis region will be described. For example, when the angle of the motion value Vg is in the hysteresis region 22.5°±5° (for example, 22.5°), and the previous transition motion direction value is R1 (0°), the transition motion direction value is set to the previous transition motion. Direction value R1 (0°).

Next, a method for calculating the average value of the converted motion direction values for a given time will be described. For example, when the angle of the motion value Vg corresponds to 22.5°, and the frequency of R1 (0°) in the previous converted motion direction value at a given time is less than the frequency of R2 (45°), the transition motion direction value setting is set. To convert the direction of motion value R2 (45°).

In the angle graph 131 of Fig. 5, the angle of the X-Y coordinate system is divided into 45° segments. Set 337.5°~22.5° to R1 (0°), 22.5°~67.5° to R2 (45°), 67.5°~112.5° to R3 (90°), and 112.5°~157.5° to R4 (135°), set 157.5°~202.5° to R5 (180°), set 202.5°~247.5° to R6 (225°), set 247.5°~292.5° to R7 (270°), and 292.5°~337.5° is set to R8 (315°) to set the central angles of R1 to R8 to representative angles, and the converted motion direction values are calculated in the eight directions. When dividing the angle of the XY coordinate system into 90° segments, set 315°~45° to R1 (0°), 45°~135° to R2 (90°), and set 135° to 225° to R3 (180°), and 225° to 315° is set to R4 (270°) to set the central angles of R1 to R4 to representative angles, and the converted moving direction values are calculated in the four directions.

In an exemplary embodiment of the present invention, it is assumed that a method of using a hysteresis region is employed between the two methods for converting motion values at boundaries.

FIG. 6 is a graph illustrating a motion amplitude calculation method of a converted motion value calculator, according to an exemplary embodiment of the present invention. An example of the motion amplitude calculation method when the motion values are X1 and X2 will be described.

The motion amplitude calculation method may use a method for mapping the amplitude r between the origin and the motion values X1 and X2 to the selected angular region, or one for A method of mapping with reference to coordinates of previously converted motion values.

For example, the method for mapping the amplitude r between the origin and the motion values X1 and X2 to the selected angular region will be described.

When the motion value X1 corresponds to the coordinate (3, 1), its amplitude and angle can be calculated by:

Since the angle of the motion value X1 is located in the hysteresis region (22.5°-5°) <θ<(22.5°+5°), the angle of the motion value X1 is converted into the previous converted motion direction value according to the above-described motion direction calculation method. When the previous converted motion direction value is R1 (0°), the angle of the motion value X1 is converted into the converted motion direction value R1 (0°). That is, the angle of the converted motion value of the motion value X1 (ie, the converted motion direction value) is R1 (0°).

The converted motion value corresponds to the coordinate of the magnitude of the amplitude closest to the motion value X1 on R1 (0°). Thus, the converted motion value of the motion value X1 corresponds to the coordinate (3, 0). That is, the magnitude of the converted motion value of the motion value X1 is the magnitude of the coordinate (3, 0).

When the previous converted motion direction value is R2 (45°), the angle of the motion value X1 is converted into the converted motion direction value R2 (45°), and the converted motion value of the motion value X1 corresponds to the coordinate (2, 2).

When the motion value X2 corresponds to the coordinates (3, -2), its amplitude and angle are calculated by:

According to the motion direction calculation method, the angle of the motion value X2 is converted into a transition motion direction value R4 (135°) of 112.5° to 157.5°. Moreover, the converted motion value of the motion value X2 corresponds to the coordinate (-3, 3).

According to the method for mapping the amplitude r between the origin and the motion values X1 and X2 to the selected angular region, the coordinates of the converted motion values corresponding to the motion values X1 and X2 are mapped to the amplitude closest to the transition motion direction. The coordinate of the magnitude r of the value.

Next, a method for mapping the amplitudes of the motion values X1 and X2 by referring to the coordinates of the previously converted motion values will be described.

When the motion value X1 corresponds to the coordinate (3, 1), its angle is calculated by the following equation: θ = arctan(1/3) = 18.43455%.

Since the angle of the motion value X1 is located in the hysteresis region (22.5°-5°) <θ<(22.5°+5°), the angle of the motion value X1 is converted into the previous motion direction conversion value according to the above-described motion direction calculation method.

When the previously converted motion value corresponds to the coordinate (2, 0), the angle of the motion value X1 is converted into the converted motion direction value R1 (0°) of 337.5° to 22.5°.

At this time, the converted motion value corresponds to the coordinate of the coordinate closest to the motion value X1. Therefore, the converted motion value of the motion value X1 corresponds to the coordinate (3, 0).

When the previously converted motion value corresponds to the coordinate (1, 1), the converted motion value of the motion value X1 corresponds to the coordinate (2, 2).

When the motion value X2 corresponds to the coordinate (-3, 2), its angle is calculated by: θ = arctan(2/3) = 146.3099°.

According to the calculation method of the motion direction, the angle of the motion value X2 is converted into a transition motion direction value R4 (135°) of 112.5° to 157.5°.

When the previously converted motion value corresponds to the coordinate (-1, 1), the converted motion value of the motion value X2 corresponds to the coordinate of the coordinate closest to the motion value X2 among the coordinates of R4. If there are two closest coordinates, then the coordinates closest to the coordinates corresponding to the previously converted motion values are selected. Therefore, the converted motion value of the motion value X2 corresponds to the coordinate (-2, 2).

According to the method for mapping the coordinates of the converted motion values of the motion values X1 and X2 by referring to the coordinates of the previous motion values, the coordinates of the converted motion values of the motion values X1 and X2 are mapped to the closest of the selected angular regions. The coordinates of the motion value and the previously converted motion value.

Between the two motion amplitude calculation methods described above, it is assumed that the present invention uses the method for mapping the magnitude of the motion value by referring to the coordinates of the previously converted motion value.

7 is a graph showing a scaling method capable of amplifying or reducing the magnitude of a motion value in the motion amplitude calculation method of FIG. 6. In FIG. 7, a motion value graph 200, a zoom state graph 201, and a zoom completion graph 202 are depicted.

The motion amplitude scaling method of FIG. 7 will be described with reference to FIG. 3 and Table 1.

The motion value graph 200 represents the motion value of the object in accordance with the X-axis and Y-axis displacements in the X-Y coordinate system. The zoom state map 201 is represented in the XY coordinate system by multiplying the motion value output from the motion value calculator 114 of FIG. 3 by a predetermined ratio calculated using the equations included in Table 1 or from the generation table as shown in Table 1. The magnitude of the scaled motion is mapped to the motion output of the motion input. The zoom completion graph 202 represents the amplified or reduced motion of the object in accordance with the X-axis and Y-axis displacements in the X-Y coordinate system.

The motion amplitude calculation method of FIG. 7 can perform an amplification or reduction operation on both the X-axis, the Y-axis, or both the X-axis and the Y-axis.

Figure 8 is a block diagram of a pointing device in accordance with a second exemplary embodiment of the present invention. The pointing device 300 includes a capacitive sensor 310, a calculator 316, and an interface 115. The calculator 316 includes a motion value calculator 320 and a converted motion value calculator 112.

The pointing device 300 of Fig. 8 will be described.

Since the converted motion value calculator 112 and the interface 115 of FIG. 8 have the same configuration and function as those of FIG. 3, the description thereof will be omitted.

The capacitive sensor 310 outputs various capacitance values under the control of the user.

The motion value calculator 320 receives the capacitance value output from the capacitance sensor 310, compares the current capacitance value with the previous capacitance value, calculates the motion angle and amplitude according to the motion of the user, and outputs a motion value Vg.

9A-9D are cross-sectional views showing the structure and sensing method of the capacitive sensor 310 of FIG.

The structure of the capacitance sensor 310 includes four electrodes P1 to P4 uniformly distributed on the lower side and a movable electrode PM on the upper side. Capacitors C1 to C4 may exist between the upper electrode and the lower electrode. The upper electrode PM is connected to a drawbar handle (not shown). The handle is attached to an elastic material (not shown). The lever handle can be moved by the user's hand. When the lever handle connected to the elastic material is not in contact with the user's hand, the handle is located at a center position between the evenly distributed four electrodes P1 to P4.

It is assumed that the total capacitance of the upper electrode is 100 when the interval between the lower electrodes is ignored. In FIG. 9A, the capacitances C1 to C4 between the upper electrode and the lower electrode have the same value. If the capacitances C1 to C4 have the values shown in column A of Table 2, this means that the user's motion does not exist. In FIG. 9B, the capacitances C1 to C4 have the values shown in column B of Table 2, and indicate that the user's motion is in the positive direction of the X-axis.

In Figure 9C, capacitors C1 through C4 have the values shown in column C of Table 2 and indicate that the user's motion is in the 22.5° direction. In Fig. 9D, the capacitances C1 to C4 have the values shown in the column D of Table 2, and indicate that the user's motion is in the direction of 45°.

Figure 10 is a block diagram of a pointing device in accordance with a third exemplary embodiment of the present invention. The pointing device 521 includes an interface 522, an application unit 523, and an output unit 524.

The pointing device 521 of Fig. 10 equipped with a built-in application will be described with reference to Figs. 3, 5 and 7.

The interface 522 receives the motion value Vg from the other pointing device 111 and outputs the motion value Vg.

The application unit 523 receives the motion value Vg output from the interface 522, and converts the motion value Vg into the converted motion value Vm using the motion direction calculation method and the motion amplitude calculation method of FIGS. 5 and 7. Application unit 523 can include a memory that stores an application.

At this time, in the motion direction calculation method of FIG. 5, the angle and amplitude of the input motion data can be converted, and the converted motion value Vm can be output in eight directions or four directions.

The output unit 524 receives the converted motion value Vm output from the application unit 523, and outputs the video signal Vsig.

A pointing device (for example, a computer) equipped with the application calculates the angle and amplitude of the input motion value using the motion direction calculation method and the motion amplitude calculation method of FIGS. 5 and 7, and outputs in eight or four directions. Corresponding to the video signal of the converted motion value Vm.

The input motion value may be the motion value Vg input to the pointing device 521 or Used as the converted motion value Vm of the output of the pointing device.

FIG. 11A is a flow chart showing a method of calculating a motion direction of an application according to the third exemplary embodiment of FIG. 9.

In step S11, the 360° angle of the X-Y coordinate system is divided into I angular regions (where I is an integer less than or equal to 360).

In step S12, a representative angle is set in each of the one corner regions.

In step S13, an angle is extracted from the motion value input from the interface of Fig. 10.

In step S14, it is determined whether the extracted angle of step 13 is included in one of the corner regions. When the extracted angle is included in one of the corner regions, the program proceeds to step S15. Otherwise, the program returns to step S13 to extract an angle from the next motion value.

In step S15, it is determined whether the extracted angle is included in the hysteresis region (±5°) near the boundary between the corner regions. When the extracted angle is included in the hysteresis region, the program proceeds to step S17. When the extracted angle is not included in the hysteresis region, the program proceeds to step S16.

In step S16, the angular area mapped to the angle extracted from the motion value is selected, and the extracted angle is replaced with the representative angle of the selected angular area, and the representative angle is set as the converted motion direction value.

In step S17, the extracted angle is replaced with the previously converted motion direction value, and the previous converted motion direction value is set as the converted motion direction value.

In step S18, the converted motion direction value is output.

FIG. 11B is a flow chart showing a method of calculating the motion amplitude of the application according to the third exemplary embodiment of FIG. 9.

In step S31, the converted motion direction value of the output step of Fig. 11A is received.

In step S32, the coordinate value is extracted from the motion value input from the interface of Fig. 10.

In step S33, it is determined whether the previous converted motion direction value is the same as the current converted motion direction value. When the previous converted motion direction value is the same, the program proceeds to step S34. When the previous converted motion direction value is different from the current converted motion direction value, the procedure goes to step S35.

When the previous converted motion direction value is the same, the new coordinate of the coordinate closest to the current converted motion direction value and the previous converted motion direction value is set in step S34.

When the previous converted motion direction value is different from the current converted motion direction value, the new coordinate of the coordinate closest to the current converted motion direction value is set in step S35.

In step S36, a coordinate scaling operation is performed to enlarge or reduce the new coordinates by multiplying the X or Y axis value of the new coordinate by a given ratio or a value of a given table.

In step S37, the coordinates are output by converting the scaled new coordinates into coordinates of the angle conversion values.

The coordinate scaling operation of step S36 may be performed before the operation for comparing the angle conversion values in step S33.

According to an exemplary embodiment of the present invention, the pointing device may provide a positioning operation suitable for the motion desired by the user by limiting the angle of motion. In particular, when the user uses the touch screen to control the pointer in the device, the fatigue of the user's fingers can be reduced.

The user can use the motion value in all directions as needed Calculation method.

While the invention has been illustrated and described with reference to the embodiments of the embodiments of the invention .

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

10,110‧‧ objects

11,111‧‧‧ pointing device

112‧‧‧Conversion exercise value calculator

13,113‧‧‧ sensor

14,114‧‧‧ exercise value calculator

15,115‧‧" interface

116‧‧‧Calculator

21‧‧‧Control device

22‧‧‧ interface

23‧‧‧Application Unit

24‧‧‧Output unit

222‧‧‧Sports direction calculation module

224‧‧‧Output control module

225‧‧‧Sports Amplitude Calculation Module

1 is a block diagram showing an example of a conventional optical pointing device using an image sensor.

2A is a diagram showing an image mapping method of the motion value calculator of FIG. 1.

2B is a graph showing an operational region of a conventional optical pointing device.

3 is a block diagram of a pointing device in accordance with a first exemplary embodiment of the present invention.

4 is a block diagram of a converted motion value calculator of a pointing device, in accordance with an exemplary embodiment of the present invention.

FIG. 5 is a graph illustrating a motion direction calculation method of a converted motion value calculator, according to an exemplary embodiment of the present invention.

FIG. 6 illustrates a specific position mapping method of the motion direction control method of FIG. 5.

FIG. 7 is a graph showing a motion amplitude calculation method of a motion controller according to an exemplary embodiment of the present invention.

Figure 8 is a block diagram of a pointing device in accordance with a second exemplary embodiment of the present invention.

9A-9D are cross-sectional views showing the structure and sensing method of the capacitive sensor of FIG. 8.

Figure 10 is a block diagram of a pointing device in accordance with a third exemplary embodiment of the present invention.

FIG. 11A is a flow chart showing a method of calculating a motion direction of an application unit according to the third exemplary embodiment of FIG. 9.

FIG. 11B is a flow chart showing a method of calculating the motion amplitude of the application unit according to the third exemplary embodiment of FIG. 9.

110‧‧‧ objects

111‧‧‧ pointing device

112‧‧‧Conversion exercise value calculator

113‧‧‧ Sensor

114‧‧‧ exercise value calculator

115‧‧‧ interface

116‧‧‧Calculator

Claims (23)

A pointing device comprising: a sensor that generates a motion detection signal by sensing motion; a calculator that receives the motion detection signal, calculates a motion value based on the motion detection signal, based on the motion value The converted motion value is calculated from an angle, and the converted motion value is output; and an interface that outputs the converted motion value input from the calculator. The pointing device of claim 1, wherein the sensor comprises: an image sensor that receives light reflected from the object and outputs the motion corresponding to the amount of received light Detection signal. The pointing device according to claim 1, wherein the sensor comprises: a lower electrode disposed on a lower side; a movable upper electrode disposed on the upper side and having respect to the lower electrode a capacitance value; and a capacitance sensor that outputs the capacitance value as the motion detection signal, the capacitance value changing when the upper electrode moves in response to a user's control motion. The pointing device of claim 3, wherein the capacitive sensor is coupled to a drawbar handle that is moveable by the user and coupled to an elastomeric material, wherein the upper electrode is applied when no force is applied Located at the center of the lower electrode. According to the pointing device of claim 1, wherein the pointing device The calculator includes: a motion value calculator that receives the motion detection signal, calculates the motion value by comparing a current motion detection signal with a previous motion detection signal, and outputs the motion value; and converts the motion value calculation And receiving the motion value, calculating the converted motion value based on an angle of the motion value, and outputting the converted motion value. The pointing device according to claim 5, wherein the motion value calculator comprises: an analog-to-digital (A/D) converter that receives the motion detection signal and converts it into a digital signal; Receiving and storing a current digital signal and a previous digital signal output from the A/D converter; and an image processor receiving the current digital signal and the previous digital signal from the memory by The current digital signal is compared to the previous digital signal to calculate the motion value and output the motion value. The pointing device according to claim 5, wherein the converted motion value calculator comprises: a motion direction calculating module that divides an angle of 360 degrees into a plurality of corner regions, and sets a representative angle of each region Calculating a converted motion direction value based on the representative angle by calculating an angle of the motion value, and outputting the converted motion direction value; a motion amplitude calculation module that receives the motion value and calculates the motion value Horizontal and vertical components by modifying the horizontal component and / Or the vertical component to calculate a converted motion amplitude value, and output the converted motion amplitude value; and an output control module that outputs the converted motion by combining the converted motion direction value and the converted motion amplitude value value. The pointing device according to claim 7, wherein when the angle of the motion value is in the lag angle region, the motion direction calculation module sets the previous transition motion direction value to the converted motion direction value. . The pointing device according to claim 7, wherein the motion amplitude calculation module additionally receives the converted motion direction value, calculates an amplitude of the motion value, and/or the horizontal component and/or the vertical The components are respectively modified into components of the coordinates of the coordinates of the converted motion direction value that are closest in magnitude to the magnitude of the motion value. The pointing device according to claim 7, wherein the motion amplitude calculation module additionally receives the converted motion direction value, and modifies the horizontal component and/or the vertical component to the switching motion respectively The coordinates of the direction values are closest to the components of the coordinates of the coordinates corresponding to the motion values. The pointing device according to claim 10, wherein when the coordinate closest to the coordinate corresponding to the motion value has two coordinates, the motion amplitude calculation module selects the value corresponding to the previous converted motion value. The coordinates of the coordinates and modify the horizontal component and/or the vertical component to the components of the selected coordinates, respectively. The pointing device of claim 7, wherein the motion amplitude calculation module reduces the horizontal component and/or increases The vertical component is used to calculate the converted motion amplitude value. The pointing device of claim 1, further comprising: a motion amplitude calculation module that receives the converted motion value from the calculator and performs a horizontal component for converting the converted motion value The converted motion value is output to the interface after adjustment to at least one of an operation smaller than a vertical component and an operation for adjusting the vertical component to be smaller than the horizontal component. A pointing device comprising: a sensor that generates a motion detection signal by sensing motion; a calculator that receives the motion detection signal, calculates a motion value based on the motion detection signal, based on the motion value Calculating a converted motion value and outputting the converted motion value; and an interface that outputs the converted motion value input from the calculator. The pointing device according to claim 14, wherein the sensor comprises: an image sensor that receives light reflected from the object and outputs the motion detection corresponding to the amount of received light signal. The pointing device according to claim 14, wherein the sensor comprises: a lower electrode disposed on a lower side; a movable upper electrode disposed on the upper side and having a capacitance with respect to the lower electrode And a capacitance sensor that outputs the capacitance value as the motion detection signal, the capacitance value being in response to a user's control motion at the upper electrode It changes when moving. The pointing device of claim 16, wherein the capacitive sensor is coupled to a drawbar handle that is moveable by the user and coupled to an elastic material, wherein the upper electrode is not applied when a force is applied Located at the center of the lower electrode. The pointing device according to claim 16, wherein the calculator includes: an exercise value calculator that receives the motion detection signal, and calculates the current motion detection signal by comparing the current motion detection signal with a previous motion detection signal a motion value, and outputting the motion value; and a converted motion value calculator that receives the motion value, calculates a horizontal component and a vertical component of the motion value, by modifying the horizontal component and/or the vertical component The converted motion value is calculated and the converted motion value is output. The pointing device according to claim 18, wherein the motion value calculator comprises: an A/D converter that receives the motion detection signal and converts it into a digital signal; a memory that receives and stores the slave a current digital signal and a previous digital signal output by the A/D converter; and an image processor that receives the current digital signal and the previous digital signal from the memory by locating the current digital signal The previous digital signal is compared to calculate the motion value and output the motion value. The pointing device according to claim 18, wherein the converted motion value calculator calculates the converted motion value by reducing the horizontal component and/or increasing the vertical component. A pointing device comprising: an interface that receives the motion value from a device that outputs a motion value and outputs the motion value; an application unit that receives the motion value from the interface, and calculates the motion value An angle, a converted motion value is calculated based on the angle of the motion value, and the converted motion value is output; and an output unit receives the converted motion value from the application unit and outputs a corresponding Video signal. The pointing device according to claim 21, wherein the application unit divides an angle of 360 degrees into a plurality of angular regions, sets a representative angle of each region, and calculates an angle based on the motion value based on Calculating a converted motion direction value by the representative angle, calculating a horizontal component and a vertical component of the motion value, and calculating the transition motion by modifying the horizontal component and/or the vertical component by referring to the converted motion direction value An amplitude value, and the converted motion value is output by combining the converted motion direction value and the converted motion amplitude value. The pointing device according to claim 22, wherein the application unit outputs the converted motion value after reducing a horizontal component of the converted motion value and/or increasing a vertical component of the converted motion value.