JPS5845070B2 - How to erase characters and figures on a tablet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for erasing coordinates, characters and figures on an input device in a handwriting communication system in which handwritten data is exchanged between three or more parties.

A handwriting communication system that connects two or more handwritten character terminal devices with a data network and sends and receives handwritten data (coordinate values) written on the coordinate input device (tablet) of each terminal device. is being developed.

Conventionally, input from the coordinate input device (tablet) of each terminal device is done using a stylus pen (the pen tip is a felt pen, pencil, etc.), but writing is done by leaving a trace of the pen tip on the tablet surface. Characters and figures are checked by the operator.

In order to erase written characters or figures, it is necessary to operate a switch or specify the erasing area with a stylus pen, display diagonal lines by writing them, or use a stylus pen with an eraser or the like attached to the tip. be.

However, the method of operating a switch or specifying an erasing area has the disadvantage that it is not possible to erase the characters or figures themselves on the tablet surface, so it is not clearly indicated that they have been erased.

Furthermore, in the diagonal line writing method, characters and diagonal lines remain on the tablet surface, making it difficult to overwrite the erased portion.

Methods using a stylus pen with an eraser or blackboard eraser attached to the tip are not suitable for erasing minute or very large areas because the erase area is determined by the size of the tip.

The purpose of the present invention is to solve the above-mentioned conventional problems by preparing multiple types of erasers, such as erasers and blackboard erasers, so that a stylus pen with these erasers attached to the tip can erase multiple large and small erase areas. The characters on the coordinate input device using
This provides a method for erasing figures.

In order to achieve the above-mentioned object, the present invention provides a handwritten communication system in which handwritten data is exchanged between three or more parties. Two or more types of erasers of different sizes are provided for erasing, and an erasure coordinate generation unit is provided on the receiving side to generate a specified erasure area based on one coordinate indicated by the eraser, and the erasure coordinate generation unit is provided. It is characterized by electrically erasing the same area as the actual erasing range based on the output information of the section.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a method for erasing characters and figures on a tablet according to the present invention.

In Fig. 1, 1 is a coordinate detection section, 2 is an eraser shape specification section, and 3
4 is a transmitting section, 4 is a receiving section, and 5 is an erasure coordinate generating section.

The coordinate input device of the terminal is equipped with multiple types of erasers, such as erasers and blackboard erasers, and these erasers are attached to the tip of the stylus pen.

The eraser at the tip of the stylus pen is the eraser type (
The shape and size of the erasing area for inputting coordinates using a stylus pen is determined in advance.

81 to Sn receive information signals representing n types of shapes and sizes of the eraser and coordinate data, and determine how the coordinate data inputted to the coordinate detection unit 1 by the eraser shape specifying unit 2 is generated. It is determined whether the type of eraser is used, and the size and shape of the erased area are notified to the erased coordinate generating unit 5 via the sb line, the transmitter 3 and the receiver 4 according to the type.

On the other hand, the coordinate detection unit 1 receives and detects the coordinate position information indicated by the eraser at the tip of the stylus pen, and sends the Sa line to the transmitter 3.
Then, the coordinate position information is sent to the erasure coordinate generating section 5 via the receiving section 4.

A signal representing the shape and size depending on the type of eraser is sent to the eraser coordinate generator 5 on the Sc line, and a coordinate position signal specified by the eraser on the tablet is sent to the eraser coordinate generator 5 on the Sd line.

The erasure coordinate generation unit 5 is provided with an input register and a storage device, and an address of the storage device is specified according to the shape and size of the eraser type stored in the input register, and storage is performed in accordance with the address. Reads the fixed erase (blank) information that is stored.

The erasure (blank) information has multiple types, from dog to small, depending on the size and shape.

This read erasure (blank) information is the coordinate position information Sd
The erasure coordinate generation unit 5 outputs the coordinate data as enlarged erasure area information at the corresponding position.

Thereafter, the erased coordinate data is filled with blanks on the receiving terminal side, and characters, figures, etc. previously written in the designated area are erased.

FIG. 2 is a state diagram in which characters and figures on a tablet are erased using a plurality of types of erasers.

Although the area to be erased is shown as a circle in the figure, it may be rectangular.

As explained above, according to the present invention, erasers of a plurality of shapes and sizes can be used, making it easy to use erasers for small areas and large areas. This has a significant effect on the operability of communication systems.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of a method for erasing characters and figures on a tablet according to the present invention, and FIG. 2 is a state diagram illustrating the erasing method according to the present invention. 1...Coordinate detection unit, 2...Eraser shape designation unit, 3...Transmission unit, 4...Reception unit, 5...・Elimination coordinate generation unit, S1 to Sn...
...Eraser information and coordinate data, Sa, Sd...
...Coordinate position signal, Sb, Sc...Erased shape and size.

Claims (1)

[Claims] 1 In a handwritten communication system in which handwritten data is exchanged between three or more parties, two types with different sizes are used to erase part or all of the handwritten characters and figures written on the tablet of each terminal device. The above eraser, a coordinate detection unit that outputs coordinate information of the eraser being used, and an eraser shape specifying unit that outputs a signal indicating the size and shape of the eraser being used are provided, and the On the side, there is provided an erasure coordinate generation unit that generates a predetermined erasure area based on one coordinate indicated by the erasure device and a signal indicating the shape and size, and the area to be actually erased is determined based on the output information of the erasure coordinate generation unit. A method for erasing characters and graphics on a tablet, which is characterized by electrically erasing the same area.