JPS60218128A - Coordinate position detector - Google Patents

Abstract

PURPOSE:To obtain a coordinate position detector having high using sensitivity by switching an input mode and an erase mode through pen operation. CONSTITUTION:A detecting signal A of the 1st coordinate position detecting electrode 7 is inputted to the 1st comparator 14 and one input terminal IN1 of an analog switch 16 and a detecting signal B from the 2nd coordinate position detecting electrode 8 is inputted to the 2nd comparator 15 and the other input terminal IN2. The outputs of both the comparators 14, 15 are outputted as mode switching signals C, D and also inputted to control terminals CS1, CS2 of the analog switch 16 and any one of them is selected and outputted to an amplifier 17. When a pattern or the like is drawn on paper 6 set up to a plane resisting body 18 with a writing means 9 on the 1st terminal part at the use of the input mode, the detecting signal A of the 1st electrode 7 is high and outputted as a positional signal E. At the time of the erase mode, an erasing means 10 on the 2nd end part selects the input terminal IN2 and outputs the positional signal E.

Description

DETAILED DESCRIPTION OF THE INVENTION tal Technical Field of the Invention The present invention relates to a coordinate position detection device having a function of automatically switching between an input mode and an erase mode.

(bl) Prior Art and Problems A coordinate position detecting device that inputs handwritten characters or handwritten figures and transmits them to a computer or the like needs a function to delete characters or figure data that are not input properly.

To delete this character 2 figure data that has already been input,
Conventionally, as shown in FIG. 1, the erase mode is entered by pressing a switch 2 provided on the coordinate position detecting device 1, or a predetermined position on the input panel 3 made of a planar resistor of the coordinate position detecting device 1 is used. .

4, there is a method in which the erase mode is entered when the input pen 5 is touched, but both methods are inconvenient because the operator must memorize the current mode.

Furthermore, even if you perform an input in the erase mode, that is, perform an erase operation, the characters, figures, etc. written on the paper 6 on the input panel 3 are not actually erased, so the transmitted data and the figures on the input panel 3 are not actually erased. The disadvantage is that it is no longer compatible and the usability is poor.

(C1 Purpose of the Invention The purpose of the present invention is to automatically switch between the input mode and the erase mode by pen operation, and to make it possible to match the figures written on the input panel with the transmitted data so that the data can be used easily. The goal is to provide a comfortable coordinate position detection device.

(d) Structure of the Invention A feature of the present invention is that the first end is provided with a first coordinate position detection means and a writing means, and the second end is provided with a second coordinate position detection means and an erasing means. and mode selection means for selectively outputting the output of one of the coordinate position detection means as a detection signal based on the output level of the first and second coordinate position detection means, If input is made at the first end, the input mode is entered, and if input is made at the second end, the erase mode is entered.

(e) Examples of the invention An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows an embodiment of the present invention. In the same figure, 7,
8 is a first and second coordinate position detection electrode; 9 is a writing means such as a ballpoint pen; 10 is an erasing means such as an eraser; 11
．． 11' is an insulator, 12 is a shield tube, 13 is a shield camp, 14.15 is a first and second comparator, 16 is an analog switch, and 17 is an amplifier. Among these, the first and second comparators 14.15. and analog switch 1G constitute mode selection means.

The detection signal A of the first coordinate position detection electrode 7 is applied to one input terminal IN of the first comparator 14 and the analog switch 16.
, is input. The detection signal B of the second coordinate position detection electrode 8 is transmitted to the second comparator 5 and the analog switch 16.
The signal is input to the other input terminal 11J2. The signals are output from the first and second comparators 14, 15 (7) as cover mode switching signals C and D, and are also input to the control terminals C5, cs2 of the analog switch 16. In the analog switch 16, one of the two inputs is selected and output to the amplifier I7. In addition to the above-mentioned input, the voltage ■c is inputted to the first and second comparators 14.15 as a reference voltage for comparison.

FIG. 3 is a diagram showing the relationship between the distance between the planar resistor 18 shown in FIG. 2 and the coordinate position detection electrode 7 or 8 and the detection signal, and the detection signal increases as the distance from the planar resistor 18 increases. The signal becomes smaller. The present invention takes advantage of this characteristic. In other words, one of the coordinate position detection electrodes used is
In use, the detection signal becomes large because it is close to the planar resistor 18.

On the other hand, since the other coordinate position detection electrode is necessarily farther away from the planar resistor 18, its detection signal becomes smaller.

When used in the input mode, writing is performed on the paper 6 on the planar resistor 18 with a writing means 9 such as a ballpoint pen provided at the first end. At this time, the detection signal A of the first coordinate position detection electrode 7 is large, and the detection signal B of the second coordinate position detection electrode 8 is small. The level of the reference voltage ■c commonly input to the first and second comparators 14.
and B, the first comparator 14
The output of is 'Ilight' and the second comparator 1
The output of 5 becomes 'Low'. In this way, C of the two mode switching signals C and D becomes "old gh' (at this time, "Lotv"), and the input mode is outputted.

At the same time, the mode switching signal C is input to the control terminal C5 of the analog switch 16, and based on this, the input terminal IN of the analog switch 16 is input.

is selected and sends out a detection signal A, which is amplified by an amplifier 17 and output as a position signal E.

When used in the erasing mode, the input pen 5 is turned upside down and the figures or characters on the paper 6 are erased using erasing means such as an eraser provided at the second end. At this time, the detection signal B of the second coordinate position detection electrode 8 becomes large and the detection signal A of the first coordinate position detection electrode 7 becomes small.
The output of the comparator 15 becomes "old ghl", and the mode switching signal becomes "old gh" (C is 'LoW'), indicating that the erase mode is in effect. Control end cs2
This selects the input terminal IN2 of the analog switch 16 and sends out the detection signal B, which is amplified by the amplifier 17 and output as the position signal E.

In order to more reliably identify the mode in the series of operations described above, the level difference between the two detection signals A and B may be made larger. For this reason, a method of making the input pen 5 longer can be considered, but if the input pen 5 is made too long, it becomes difficult to handle and is often not practical.

The shield camp 13 shown in FIG. 2 is a means for increasing the level difference between the two detection signals A and B described above, and the shield cap 13 is attached to the coordinate position detection electrode opposite to the end used. This weakens the signal voltage generated on the unused electrodes.

Therefore, the level difference between the two detection electrodes 7 and 8 increases, and the margin for mode identification increases. This is natural from the viewpoint of usability, and does not impair operability.

As described above, in this embodiment, when the first end is used, at the same time as characters or figures are drawn on the paper, the coordinates of the input position of the drawn characters or figures are transmitted as the input mode. , stored as character or graphic data. In addition, when the second end is used, unnecessary parts such as characters or figures that have already been drawn are erased from the paper, and at the same time, the coordinate position of the erased unnecessary part is transmitted as an erase mode, and the Stored data such as characters or figures can be deleted.

By using this embodiment in this manner, the transmission of input data and the erasure of stored data correspond to the input and erasure of characters or figures on paper, making the operation extremely easy and reliable.

(fl) Effects of the Invention According to the present invention, by operating a single pen in the same way as normal writing, switching between input mode and erasing mode can be performed automatically. This has the effect that the displayed characters or figures correspond to the transmitted data.Furthermore, by using the shield camp, mode switching becomes more reliable without impairing the usability.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts for explaining the difficulties of the conventional coordinate position detection device, FIG. 2 is a block diagram of the main parts showing the configuration of an embodiment of the present invention, and FIG. 3 is a detailed view of the present invention. It is a curve diagram for explanation. In the figure, 1 is a coordinate position detection device, 5 is an input pen, and 6 is a coordinate position detection device.
is paper, 7 and 8 are first and second coordinate position detection electrodes, 9 is writing means, 10 is erasing means, 11.11'
is an insulator, 12 is a shield tube, 13 is a shield camp, 14 and 15 are first and second comparators, respectively, 16 is an analog switch, 17 is an amplifier, A and B are detection signals, C and D are switching signals, E indicates a position signal. Figure 1? Figure 3

Claims (1)

[Scope of Claims] An input pen comprising a first coordinate position detection means and a writing means at a first end and a second coordinate position detection means and an erasing means at a second end; mode selection means for selectively outputting the output of one of the coordinate position detection means as a detection signal based on the output level of the first and second coordinate position detection means; If so, input mode. A coordinate position detection device characterized in that it enters an erase mode when an input is made at the second end.