JPS63219030A - Cursor control system - Google Patents

Abstract

PURPOSE:To speedily move a cursor to a target position within a small space by calculating the position and the direction of a pressing point and pressing force based on the output signal of a piezo-electric sensor, and controlling the cursor based on the result of the calculation. CONSTITUTION:When a planar plate 1 is depressed by a finger or the like, pressure signals VS1-VS4 are outputted from the piezo-electric sensors S1-S4, and inputted to a multiplexer 2. The multiplexer 9 selects one of the signals VS1-VS4 according to the instruction of a microprocessor 3, and sends the selected pressure signal to the processor 3. The processor 3 instructs the multiplexer 2 to select the signals VS1, VS2, VS3, VS4 in the said order, and hereafter, a similar processing is repeated. The selected signal is A/D-converted by an A/D converter 4. Next, the processor 3 calculates the position or the pressing direction of the pressing point or the pressing force based on the signals VS1-VS4, and it controls the movement of the cursor according to a calculated result.

Description

[Detailed description of the invention] [Summary] A flat plate is provided on top of piezoelectric sensors arranged at three or four places, and when the flat plate is pressed with a finger etc., the position of the pressing point,
The present invention relates to a cursor control method in which the direction and pressure of a pressing point are calculated, and the cursor is controlled based on the position, direction, and pressing force of the pressing point.

[Industrial application field]

The present invention relates to a cursor control system in which a flat plate is placed on piezoelectric sensors arranged at three or four locations, and the movement of the cursor is controlled by pushing the flat plate.

[Conventional technology]

Conventional techniques use cursor keys, a mouse, a light pen, etc. to move a cursor on a display screen.

[Problem to be solved]

When moving the cursor using the cursor keys,
There is a disadvantage that it takes time to move the cursor, and when moving the cursor using a mouse, there is a disadvantage that space is required for moving the mouse.

The present invention was created in view of this point, and it is an object of the present invention to provide a cursor control method that can quickly move a cursor to a desired position in a small space.

[Means for solving problems]

FIG. 1 is a diagram showing the principle of the present invention. The cursor input device is composed of a flat plate 1 and four piezoelectric sensors S1 to S4. When the flat plate 1 is pressed, pressure signals are output from the piezoelectric sensors Sl to S4. These pressure signals are input to the microprocessor (3). The microprocessor 3 calculates the position of the pressing point, the direction of the pressing point from the origin, the pressing force, etc. based on the input pressure signal, and controls the cursor based on the calculation results. Note that the number of piezoelectric sensors may be three.

〔Example〕

FIG. 2 is a block diagram of one embodiment of the present invention.

In Fig. 2, 1 is a flat plate, 2 is a multiplexer, 3 is a microprocessor, 4 is an A/D converter, Sl to S
4 represents a piezoelectric sensor, and VS1 to VS4 represent the outputs of the piezoelectric sensor, respectively. The piezoelectric sensors S1 to S4 are arranged approximately at the center of each side of the rectangular flat plate 1.

A flat plate 1 is placed on top of the piezoelectric sensors Sl to S4. When the flat plate 1 is pressed with a finger or the like, pressure signals S1 to VS4 are outputted from the piezoelectric sensors S1 to S4. Outputs VSI to V from piezoelectric sensors S1 to S4
S4 is input to multiplexer 2. The multiplexer 2 outputs the pressure signals VS 1° VS 2 . VS3. One of the VS4 is selected and the selected pressure signal is sent to the microprocessor 3.

The microprocessor 3 instructs the multiplexer 2 to first select the pressure signal VSI, then select the pressure signal VS
2, then pressure signal S3, and then pressure signal VS4. The same process is repeated thereafter. Furthermore, the microprocessor 3 calculates the position of the pressing point, the pressing direction, and the pressing force based on the pressure signals VSI to VS4, and controls the movement of the cursor based on the calculation results. The A/D converter 4 has a function of converting an analog electrical signal into a digital electrical signal.

FIG. 3 is a diagram showing the positional relationship between the output of the piezoelectric sensor and the pressing point. Now, if the X-direction component of the distance from the piezoelectric sensor S4 to the pressing point P is a1 and the X-direction component of the distance from the piezoelectric sensor S2 to the pressing point P is b, then VS4Xa=VS2Xb. If the midpoint of the line segment connecting the piezoelectric sensors S4 and S2 is the origin of the X coordinate, then the X coordinate of the pressing point P is as follows. however,
S is the length of the line segment connecting piezoelectric sensors S4 and S2. Similarly, if the midpoint of the line segment connecting the piezoelectric sensors Sl and S2 is set as the origin of the X coordinate, the X coordinate of the pressing point P is as follows.

FIG. 4 is a diagram showing the relationship between the amount of cursor movement (velocity) and the pressing force. The larger the pressing force of the microprocessor 3, the more
Increase the amount or speed of cursor movement. Note that the pressing forces are VS1, VS2. It is obtained by adding VS3°VS4. As shown in the figure, the cursor movement amount (velocity) is O when the pressing force is between O and T1, 1 between T1 and T2, and 2 between T2 and T3. The period from T3 to T4 is set to 4.

FIG. 5 explains another method of using the cursor input device of the present invention. Note that the cursor input device refers to a portion composed of the flat plate 1 and the piezoelectric sensors S1 to S4. As shown in the figure, by placing a finger on the flat plate L and changing the direction of applying force, the piezoelectric sensor S1 to S
It is also possible to change the pressure applied to 4.

The microprocessor 3 can operate in mouse mode or in tablet mode. In mouse mode, the cursor position is on flat plate 1.
The cursor input device provides information indicating the direction and amount of movement of the cursor on the screen.

The tablet mode is a mode in which the display screen and the flat plate 1 correspond to similar shapes, and when the accuracy of coordinate detection is low relative to the resolution of the screen, as shown in FIG.
A part of the display screen is made to correspond to a flat plate. In Figure 6, the height of the flat plate is vy, the width is Hx, and the center coordinates of the flat plate are X.
. It is represented by RG I 3'ORG.

I am also thinking of a way to combine the two modes, first using tablet mode to place the screen and flat board in one-to-one correspondence, roughly moving the cursor to the desired position, and then using mouse mode to move the cursor to the exact position. It will be done.

FIG. 7 is a diagram showing the flow of processing performed by the microprocessor.

■ Select the mode.

■ Select tablet mode.

■ Enter the origin coordinates, and then enter the supported screen size.

■ Check whether there is pressure. If yes, process ■. Note that Δ is checked every time to see if there is pressure.

■ Calculate the press coordinates on the flat plate.

■ Convert to on-screen coordinates.

Find the cursor movement speed if necessary. The cursor movement speed is proportional to the pressing force.

■ Select the mouse mode.

■ Check whether there is pressure. If there is, process ■.

■ Calculate the pressing force and pressing point direction.

0 Calculate the relative movement amount.

■ Obtain cursor position information.

Note that 5(IP+) is a function showing the relationship between the pressing force and the amount of movement shown in FIG. M, and My are the planes of the flat plate (j2
xXj2y) is a proportionality constant that corresponds to the specified screen size, M, is)i x / 1 x, and M.

is Vy/Ay. The origin input is to determine which position on the screen corresponds to the origin of the flat plate.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, coordinates are detected with a small and simple configuration, and the four keys are not independent like, for example, a cursor key, so fingers can be moved smoothly. Further, as shown in FIG. 5, the cursor can be moved by simply changing the direction in which force is applied with one finger. Furthermore, since absolute coordinates on a flat plate can also be input, it is also possible to input characters, etc.

[Brief explanation of the drawing]

Fig. 1 is a diagram of the principle of the present invention, Fig. 2 is a block diagram of an embodiment of the present invention, Fig. 3 is a diagram showing the positional relationship between the output of the piezoelectric sensor and the pressing point, and Fig. 4 is the amount of cursor movement ( 5 is a diagram illustrating another usage of the cursor input device of the present invention, 6 is a diagram illustrating the tablet mode, and 7 is a diagram illustrating the relationship between the cursor input device of the present invention and the pressing force. FIG. 2 is a diagram showing the flow of processing performed in FIG. 1... Flat plate, 2... Multiplexer, 3... Microprocessor, 4... A/D converter, Sl or S
4...Piezoelectric sensor, VSI or VS4...Output of the piezoelectric sensor. Figure 3 Sword - Soru ladle movement amount (depth) Otsuki Kai j J's Seki 4th death Tou Zu grip's I Uke J Shota Kufupashi Soto 7-to' We Month 86 Figure ML Vice sauce Figure

Claims (1)

[Claims] A cursor input device configured by arranging piezoelectric sensors (S1, S2,...) at three or four locations and placing a flat plate (1) on the piezoelectric sensors (S1, S2,...); ), the microprocessor (3) calculates the position of the pressing point on the flat plate (1), the direction of the pressing point as seen from the origin, and the pressing force, and controls the cursor based on the calculation results. ) A cursor control method comprising: