JPH04137122A - Cursor controller - Google Patents

Abstract

PURPOSE:To smoothly move a cursor irrespective of the extent of movement of a pointing device is large or small by varying the time of data reception from the pointing device. CONSTITUTION:A comparing circuit 50 compares the value preliminarily set to a register 70 with the value of the data output signal outputted from an X coordinate control circuit 30. When the former is smaller, a shorter read-out time interval of an X coordinate counter is designated to an X coordinate control circuit 30; but when the former is larger, a longer read-out time interval is designated. A comparing circuit 60 compares the value preliminarily set to the register 70 with the value of the data output signal outputted from a Y coordinate control circuit 40. When the former is smaller, a shorter read-out time interval of a Y coordinate counter is designated to the Y coordinate control circuit 40; but when the former is larger, a longer read-out time interval is designated to the Y coordinate counter. Consequently, data is sampled at intervals of a short time when the pointing device is quickly moved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile cursor pointing device control apparatus.

[Conventional technology]

Conventionally, mobile cursor pointing devices (hereinafter referred to as pointing devices) can move a cursor at relatively high speed and with high precision, and there are mechanical methods, optical methods, and the like.

Here, we will discuss a mechanical type that is inexpensive and widely used. Its structure has a roller attached to the pointing device, and the amount of rotation of the roller can be adjusted horizontally (
(X coordinate) and vertical direction (X coordinate), and store the relative displacement in each counter.

The host computer reads the counter value and displays a cursor on the screen.

[Problem to be solved by the invention]

The above-mentioned conventional pointing device compares the amount of rotation of the roller with a counter value and reads the amount of movement at regular time intervals, so it has the disadvantage that the cursor may not be moved a lot or may not move smoothly.

[Means to solve the problem]

According to the present invention, "a counter that counts the amount of movement of a mobile cursor pointing device; a control circuit that receives data from the counter at specified time intervals; and a control circuit that receives data from the counter at specified time intervals; and a control circuit that receives data output from the control circuit and a preset value. and a comparison circuit for comparing the cursor control device and the cursor control device which resets the time interval in the control circuit based on the comparison result in the comparison circuit.

〔Example〕

Next, an embodiment of the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. Input signals to the X-coordinate counter 10 include a data output signal 11 from the pointing device and a reset signal 32 from the X-coordinate control circuit 30, and output signals include a data output signal 12.

Input signals to the X-coordinate counter 20 include a data output signal 12 from the pointing device and a reset signal 42 from the X-coordinate control circuit 40, and output signals include a data output signal 22.

The input signals to the X coordinate control circuit 30 include the data output signal 12 from the X coordinate counter 10 and the comparison circuit 50.
The output signals are a reset signal 32 and a data output signal 31.

The input signals to the X coordinate control circuit 40 include the data output signal 22 from the X coordinate counter 20 and the comparison circuit 60.
The output signals are a reset signal 42 and a data output signal 41.

The input signals of the comparison circuit 50 are the data output signal 31 from the X coordinate 30 and the data output signal 71 from the register 70, and the output signal is the control signal 51.

The input signals of the comparison circuit 60 are the data output signal 41 from the X coordinate 40 and the data output signal 71 from the register 70, and the output signal is the control signal 61.

The output signal of the register 70 is the data output signal 71.
It is.

As an input signal to the control circuit 80, the X coordinate control circuit 30
and a data output signal 41 from the X coordinate control circuit 40.

Next, the operation of this embodiment will be explained. Data input from a pointing device is divided into an X coordinate and an X coordinate according to the direction of movement, and the X coordinate counter 10 and the X coordinate counter 20 are constantly incremented or decremented, respectively.

The X coordinate control circuit 30 receives the counter value from the time interval data output signal 12 specified by the comparison circuit 50, outputs a reset signal 32 to the X coordinate counter 10, and clears the counter 10. The retrieved counter value is retrieved from the data output signal 22 at time intervals specified by the control circuit 80 and the comparator circuit, and is sent to the reset signal 42.
is output to the X coordinate counter 20, and the counter 20 is cleared. The retrieved counter value is output to the control circuit 80 and the comparison circuit 60.

The comparison circuit 50 compares the value of the register 70 set in advance with the value of the data output signal output from the X-coordinate control circuit 30, and if the value of the register 70 is small, the X-coordinate counter is sent to the X-coordinate control circuit 30. If the value of the register 70 is larger, the value of the register 70 is compared with the value of the data output signal output from the X coordinate control circuit 40, and the value of the register 70 is read.
If the value of is smaller, a shorter time interval for reading the Y coordinate counter is specified to the
If the value of 0 is larger, the time interval for reading the Y coordinate counter is set longer.

Therefore, when the pointing device is moved quickly, data sampling can be performed at short time intervals.

〔Effect of the invention〕

As described above, the present invention has the advantage that by making the data acquisition time from the pointing device variable, the cursor can be moved smoothly even if the amount of movement of the pointing device is large or small.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. 10...X coordinate counter, 20...Y coordinate counter, 30...X coordinate control circuit, 40...Y coordinate control circuit, 50.80...comparison circuit, 70...register,
80...control circuit. Agent Patent Attorney Susumu Uchihara

Claims (1)

[Claims] 1. A counter that counts the amount of movement of a mobile cursor pointing device; a control circuit that receives data from the counter at specified time intervals; and a control circuit that receives data output from the control circuit and presets. A cursor control device comprising: a comparison circuit that compares the cursor with a value obtained by the comparison circuit, and resets a time interval in the control circuit based on a comparison result in the comparison circuit. 2. The cursor control device according to claim 1, wherein the counter is cleared by a reset signal, and the control circuit is cleared every time it receives data from the counter. 3. An X-coordinate counter and a Y-coordinate counter that count the amount of movement of the mobile cursor pointing device in the X-coordinate and Y-coordinate, respectively; and an X-coordinate counter that receives data from the X-coordinate counter and the Y-coordinate counter, respectively, at specified time intervals. It has a coordinate control circuit, a Y-coordinate control circuit, and an X-coordinate comparison circuit and a Y-coordinate comparison circuit that compare data output from the X-coordinate control circuit and Y-coordinate control circuit with a preset value, A cursor control device characterized in that time intervals are reset in the X-coordinate control circuit and the Y-coordinate control circuit, respectively, based on comparison results in the X-coordinate comparison circuit and the Y-coordinate comparison circuit.