JPH04332027A - Coordinate input device - Google Patents

Abstract

PURPOSE:To provide a coordinate input device capable of repeatedly executing the correction of a necessary position. CONSTITUTION:Reference coordinate marks corresponding to the prescribed number of marks are displayed on a display part by a reference coordinate display means (step 103) at the time of adjusting a pen, and when one of the marks is depressed plural times, the newest signal out of signals obtained by converting a reference coordinate system signal is registered by a registering means (step 116) to correct the position.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coordinate input device suitable for use in a small portable computer such as an electronic notebook device having a display section with a tablet provided on the display screen.

0002

[Prior Art] For example, in order to miniaturize a computer, a transparent tablet is pasted on the screen, and when a graphic part of a key displayed on the screen is pressed, the tablet generates a coordinate signal corresponding to the key position. However, devices have been used that have the same effect as pressing a key.

However, since the pressure is actually applied through the thickness of the tablet, the coordinates of the display screen and the coordinates of the tablet do not exactly match due to parallax caused by the thickness. Therefore, an error occurs between the coordinates on the screen and the coordinates on the tablet, and correction is required to absorb this error.

In order to perform this correction, for example, a reference coordinate mark is displayed on the screen prior to the start of use, and the reference coordinate mark is pressed. In this way, the reference position is pressed accurately, including parallax, so the difference between the displayed position of the reference coordinate mark at that time and the pressed position detected from the tablet is The coordinate signal is corrected and converted to the screen coordinate signal.

[0005]

[Problem to be Solved by the Invention] However, with such conventional devices, when the tablet is pressed, the pressed position is registered as the reference coordinates, so the position of the pressed tablet is inaccurate due to mishandling. In this case, the position correction must be reset. In particular, with pressure-sensitive devices, the discrepancy between the tablet coordinates and the display screen coordinates is not uniform over the entire surface of the tablet, so corrections must be made at multiple locations on the screen. I need to start over.

[0006] The present invention has been made in view of this situation, and is designed to enable repeated correction of necessary locations.

[0007]

[Means for Solving the Problems] In order to solve such problems, the coordinate input device of the present invention is provided with a tablet on a display screen, and by pressing the tablet at a position corresponding to the display screen, the coordinate input device of the present invention calculates the pressed position coordinates. In a coordinate input device that generates a signal, there is a reference coordinate display means that displays a reference coordinate mark at the reference coordinate position on the screen, and a display unit that displays the latest coordinates generated from the tablet when a position near the reference coordinate mark is pressed multiple times. The present invention is characterized by comprising a registration means for registering a signal in correspondence with a coordinate system signal of a reference coordinate.

[0008]

[Operation] In the coordinate input device configured as described above, when the vicinity of the reference coordinate mark is pressed multiple times to perform position correction, the latest position signal is corrected and converted into a coordinate system signal of the reference coordinate and registered.

[0009]

Embodiment FIG. 1 is a block diagram showing the configuration of an embodiment of an electronic notebook device to which the present invention is applied. In Figure 1,
The input section 1 incorporates various switches including a power switch, and signals corresponding to the operations thereof are supplied to the CPU 4 via the interface section 2. A DC voltage obtained by rectifying and smoothing the AC power supply is supplied to the power supply circuit 3. The power supply circuit 3 has a battery 3a inside, and when the voltage from the AC power supply is supplied, the voltage is used as the operating power inside the device, and when the voltage from the AC power supply is not supplied, the voltage from the battery 3a is used. The voltage is used as the operating power source inside the device.

A tablet 8, a display section 9, and a speaker 10 are connected to the interface section 2, and a CPU 4, a ROM 5, a RAM 6, and a backup memory 7 are also connected via a bus line.

The tablet 8 is constructed by pasting transparent touch electrodes on the display surface of the display section 9.
Graphics such as buttons displayed on the display section 9 are used as input buttons on the tablet 8. When the operator touches a graphic part such as a button visible through the transparent touch electrode, a coordinate signal of the touched part is supplied to the CPU 4, and a predetermined input is performed.

[0012] As described above, when the operator touches a corresponding part of the tablet 8, a coordinate signal of that part is generated, but this signal is generated by a pressure change using a pressure-sensitive type, or by a capacitance signal. There are some that occur due to changes in capacitance according to the formula, and either of them may be used.

FIG. 2 is a flowchart showing the operation of the apparatus to which the present invention is applied, and shows the operation of pen adjustment. When this pen adjustment mode is selected by performing a predetermined input from the tablet 8, step 100 is performed.
Initialization is performed in step 101, and five flags F0 to F4, which will be described later, are set to 0, and in step 101, as shown in FIG.
A screen like the one shown will be displayed.

Then, in step 102, a variable n representing the number of reference positions is set to 0, and a reference coordinate mark is displayed at the reference position coordinates (xn, yn) as shown in step 103 (reference coordinate display means). In this case, since n is set to 0, the 0th reference position coordinates (x0, y
0), a reference coordinate mark (the "+" mark shown in FIG. 4) is displayed.

Then, in step 104, n is incremented by 1, and while n is determined to be smaller than 5 in step 105, the process returns to step 103 and the reference position coordinate (x
n, yn), the first, second, third, and fourth reference coordinate marks are sequentially displayed each time n is incremented. In this way, the number of reference coordinate marks increases each time n is incremented, and finally five reference coordinate marks are displayed on the entire surface of the display section 9 as shown in FIG.

When it is determined in step 105 that the number of reference coordinate marks has reached five, step 106
A pen-down determination is made at . At this time, pen down is not performed, and the power is pressed in step 107.
In other words, unless a decision is made to turn off the power switch, the device remains on standby.

When it is determined that the pen is down in step 106, a position signal representing the pressed coordinates (X, Y) of the pen down part is generated from the tablet 8, and step 1
At step 08, it is converted into a coordinate signal representing the coordinates (x, y) of the reference coordinate system. Then, in step 109, a variable n representing the number of reference positions is set to 0, and in step 110, whether the previously converted coordinates are within the tolerance frame W determined as the reference coordinates (near the reference coordinate mark) or not. to judge.

This judgment is made if the converted coordinates (x, y) are within a predetermined tolerance width w (1/2 width of the tolerance frame W) with respect to the coordinates (xn, yn) determined as reference coordinates. It is determined whether or not by the following formula. xn-w≦x≦xn+w ・・・・・・(1) yn-
w≦y≦yn+w ・・・・・・(2)

[0019]
When it is determined in step 110 that the coordinate signal generated from the tablet 8 is within the frame W in FIG. 4 determined as a reference coordinate mark, a flag Fn corresponding to the reference coordinate mark is set to 1 in step 113. That is, if it is the 0th reference coordinate mark, F0 is set to 1.

Through this flag setting process, it is determined that the coordinate signal generated from the tablet 8 is within the frame W including the reference coordinate mark, and in step 114 the coordinate signal generated by pen down is determined to be within the frame W including the reference coordinate mark.
The position signal (X, Y) is converted to the coordinate (x
A process is performed to set the position signal of the position (Xn, Yn) corresponding to the position (Xn, Yn), and the data is temporarily stored.

Then, in step 115, it is determined whether the flags F0 to F4 corresponding to the reference coordinate marks are all set to 1. If all of the flags F0 to F4 are not 1, the process returns to step 106, and the pen-down determination is made again. If the next reference coordinate mark is pressed here, the same process as described above is performed, and if the pressed part is within the frame that includes the reference coordinate mark, the coordinates of the pressed part are set, and step 114 Coordinate setting processing is performed in .

The display of the reference coordinate mark and the frame continues even after the pen is moved down within the frame. Therefore, it is possible to press it again. Here, if it turns out that a certain point was pressed incorrectly and that part is pressed again, it is determined in step 106 that the pen is down, and the signal generated from the pen down part is subjected to coordinate transformation in step 108. Then, in step 109, n is set to 0, and in step 110, it is determined whether the coordinates are within the frame.

If the pressed part is not the 0th reference coordinate mark, n is incremented in step 111, and it is determined whether n becomes 5 or the converted coordinate is within the frame. It can be continued until As n is incremented, step 1
At step 10, n comes to represent the corresponding reference coordinate mark, so the flag is set to 1 again at step 113, and coordinate setting processing is performed at step 114.

[0024] As a result, the previously stored data is updated to the data set later. Even if the data is set once in this way, it can be updated any number of times before performing the registration process described later.

If it is determined in step 115 that all the flags are 1, it means that the position correction has been completed for all the reference coordinate marks, so step 116
(Registration means) The correction coordinates are registered as shown in (registration means). That is, in step 114, the average difference between the coordinates detected by the tablet 8 and the coordinates displayed by the display unit 9 is calculated from the temporarily stored data to obtain a correction value. This correction value is then registered. Since the position correction is now complete, as shown in step 117, the screen is returned to its original state and the process is completed.

[0026] Note that in step 107, when the power is pressed,
That is, when an operation to turn off the power is performed, the process of returning the screen to the original state in step 117 is immediately performed, control (not shown) is performed, and the power is turned off.

In the above description, the correction processing is performed at a plurality of positions, but it may be performed at one position. In this case, for example, after the pen is moved down into the frame, the display may be continued for a certain period of time, or a separate button may be provided to terminate the correction operation.

[0028]

As described above, according to the coordinate input device of the present invention, when an operation is performed multiple times, the latest coordinates are registered. However, the data can be updated any number of times later, and there is no need to correct the position of all reference coordinate marks again in order to correct one reference position as in the past, improving work efficiency. It has this effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of an electronic notebook device configured by applying the present invention.

[Fig. 2] Flowchart showing the operation of the device in Fig. 1.

[Figure 3] Diagram showing an example of the screen that is first displayed during pen adjustment

[Figure 4] Diagram showing the display state of the reference coordinate mark

[Explanation of symbols]

1 Input section 2 Interface part 3 Power supply circuit 3a Battery 4 CPU 5 ROM 6 RAM 7 Backup memory 8 Tablet 9 Display section 10 Speaker

Claims (1)

[Claims] Claim 1: In a coordinate input device in which a tablet is provided on a display screen and a pressed position coordinate signal is generated by pressing the tablet at a position corresponding to the display screen, a reference coordinate mark is displayed at a reference coordinate position on the screen. and a registration means for registering the latest coordinate signal generated from the tablet in correspondence with the coordinate system signal of the reference coordinate when a position near the reference coordinate mark is pressed a plurality of times. A coordinate input device characterized by: