JPS61296422A - Coordinate input device - Google Patents

Abstract

PURPOSE:To obtain precise absolute coordinates on a coordinate plate by an inexpensive device without the influence of disturbance or the like by moving a coordinate indicator to detect analog information consisting of prescribed color information arranged on the coordinate plate. CONSTITUTION:The analog information 2 indicating color information obtained by changing the hue and saturation of e.g. violet obtained by mixing red and blue two-dimensionally and continuously is arranged on almost the whole area of the coordinate plate 1. The information 2 is read out by a sensor part 6 in the coordinate indicator 3 and decomposed into three original color components 11-a-11-c and respective components 11-a-11-c are outputted. A disturbance removing part 7 removes the influence of disturbance, extracts X-Y analog coordinates consisting of an R-component 12-a and a B-component 12-b and outputs the extracted coordinates as a data signal. The signal is A/D converted into respective components by respective A/D converters 8-a, 8-b, respective digital components are converted into a serial signal 14 by a parallel/ serial conversion part 9 and the serial signal 14 is sent to a host system 10.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a coordinate input device that is attached to a main machine such as an information processing device and inputs coordinate information of a moving body into the main machine, and particularly relates to a coordinate input device that inputs coordinate information of a moving object into the main machine, and in particular, a coordinate input device that inputs coordinate information of a moving object into the main machine, and in particular, a coordinate input device that inputs coordinate information of a moving object into the main machine, and in particular, It is configured to have a coordinate plate on which are arranged.

[Prior art]

Conventional coordinate input devices of this type include those that detect the movement of coordinates from the rolling of a pole, those that detect absolute coordinate values using the magnetostrictive effect, as well as optical, electronic, and other devices. i! Inductive type,
There are various types such as pressure-sensitive type, but mechanical type has the disadvantage of insufficient durability and accuracy, and optical and electromagnetic type have complicated and expensive configurations, or
All of them had some drawbacks, such as being easily affected by external disturbances.

〔the purpose〕

An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional technology and to continuously detect and obtain accurate absolute coordinate information without being affected by external disturbances using a simple and inexpensive configuration. An object of the present invention is to provide a coordinate input device.

[Key points of the invention]

The coordinate input device of the present invention is capable of detecting absolute coordinates, which could not be detected conventionally, using a simple coordinate indicator commonly called a mouse.

In addition, in order to achieve the above-mentioned purpose without requiring a complicated coordinate identification circuit like an absolute coordinate reading device, which is generally called a digitizer, for example, X, -Y
A coordinate indicator is placed on a coordinate board 1- on which different information, such as colors of different hues, are drawn by changing the amount of information such as saturation continuously in two directions different from each other. , it is possible to detect absolute coordinates with high precision using such analog information.

〔Example〕

In the following, the invention will be described in detail by way of example embodiments with reference to the drawings.

First, FIG. 1 shows the external appearance of one embodiment of the coordinate board and coordinate indicator that constitute the main parts of the coordinate input device of the present invention, that is,
The device of the present invention places a coordinate indicator 3 on a coordinate board 1 on which analog coordinate information 2 as described in detail below is arranged, identifies the absolute position coordinates from the analog coordinate information 2 of the position, and identifies the absolute position coordinates of the main engine or It is configured to be sent as a serial signal to the host side.

Next, one embodiment of the coordinate indicator 3 is shown in FIG. In this embodiment, two color information, red and blue, are used as the analog information 2, and as shown in the figure, the analog information 2-a for the X direction is red, and the analog information 2-b for the Y direction is Color it blue. These color information 2-a and 2-b are each X
, the colors are arranged so that the color becomes darker as you move in the positive direction of Y. Note that the saturation of each color information is changed linearly and continuously.

In addition, the color information of the two colors red and blue are superimposed on each other, and therefore, over almost the entire area of the coordinate board J, the hue and saturation of the purple color due to the color mixture is "two-dimensionally continuous. "changed color coordinate information" is shown.

Next, FIG. 3 shows an embodiment of the coordinate indicator 3 arranged on the coordinate board 1 to indicate absolute coordinates based on the above-mentioned color information. 3
For example, a light emitting element 4 for illuminating the analog information 2 configured and arranged as described above and a light receiving sensor 5 for reading the illuminated analog information 2 are provided inside.

Here, as the light emitting element 4, for example, an LED, a tungsten lamp, a semiconductor laser element, etc. are used, or
It is also possible to guide the light from a light source made of these elements into the coordinate indicator 3 using a fiber scope or the like, and use the light emitted from the end face thereof.

On the other hand, as the light receiving sensor 5, in order to detect color information, for example, at least two sets of photodiodes with different photosensitive wavelengths are used with a color sensor or a color filter interposed therebetween.

According to the configuration described below, when the color information read by the light receiving sensor 5 is divided into red and blue color components and extracted, the saturation of each hue corresponds to the absolute value of both the X and Y coordinates. There is. Therefore, continuous absolute coordinate values can be detected.

An embodiment of a circuit device for detecting such color coordinate information is shown in FIG. In the illustrated circuit device, the color coordinate information read by the sensor unit 6 as described above is R, G, B.
Separated into three primary color components, the R component of the detection output signal,
11-a, G component.

11-c, component B, and 11-b are formed.

Note that in order to identify absolute coordinates using such color information, it is sufficient to have two primary color components whose saturation changes along different directions, and in the above example, for example, if the R component and B component of the detection output signal are If there is, the G component is not necessarily required.

Next, each color signal component 11-a, 11-b, 11
-c to the disturbance removal unit 7 to remove the influence of disturbances such as ambient light, and provide analog coordinate information in both X and Y directions consisting of appropriate two-color signal components, for example, RX & minute 12-a and B component 12-b. , and use it as a data signal. The data signals 12-a and 12-b are guided to an X-direction analog-to-digital (A/D) converter 8-a and a Y-direction A/D converter 8-b to form an X-coordinate digital signal by digital conversion. Signal 13-a and Y coordinate digital signal 1
3-b parallel signal serial-parallel (P/S)
The signal is supplied to the converter 9, converted into a serial signal 14, and then sent to the main machine, that is, the host system (CPU) 10. Note that the detection control program is stored in the ROM in eputo, but its flowchart will be omitted here.

In the embodiment described below, the light receiving sensor 5 is provided in the coordinate indicator 3 to directly receive the reflected light from the coordinate plate 1, but the reflected light from the coordinate plate 1 is transmitted through the optical fiber scope. It is also possible to use a configuration to guide the light to a color sensor or the like located at another location. In that case, the degree of freedom in arranging each component is increased, and not only the adjustment of the mounting becomes easy, but also the shape and dimensions of the coordinate indicator 3 can be set arbitrarily.

〔effect〕

As is clear from the following explanation, in the coordinate input device of the present invention, the coordinate board can be formed extremely easily, and the density of the coordinate information can be sufficiently increased, so that high accuracy can be achieved. It becomes possible to provide a coordinate input device at a low cost, and furthermore, by arranging multiple coordinate indicators on the coordinate board, multiple coordinate values can be input independently without changing the configuration of each element. A special effect can also be obtained in that both can be detected at the same time.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the main part of the coordinate input bag of the present invention, and Fig. 2 shows the coordinates when each color information of red in the X direction and blue in the Y direction is arranged as analog coordinate information. FIG. 3 is a diagram showing an embodiment of the plate, FIG. 3 is a sectional view showing an embodiment of the coordinate indicator, and FIG. 4 is a block diagram showing an embodiment of the signal processing circuit device. DESCRIPTION OF SYMBOLS 1... Coordinate board, 2... Analog information, 2-a... X direction component, 2-b... Y direction component, 3... Coordinate indicator, 4... Light emitting element, 5 ... Light receiving sensor, 6... Sensor section, 7... Disturbance removal section, 8... Analog-digital (A/D) conversion section, 8-
a...X coordinate conversion unit, 8-b...Y coordinate conversion unit, 9...Parallel-serial (P/S) conversion unit, 10.
...Main machine (host system). Fig. 1 3 Polishing instruction number Fig. 3

Claims (1)

[Scope of Claims] 1) A coordinate board in which at least two types of mutually different information are arranged with the amounts of the information continuously changing along different directions, and each of the two types of information is detected. A coordinate input device comprising: a coordinate indicator that includes a detection means and moves on the board; and an identification means that identifies absolute position coordinates based on the detected information. 2) The coordinate input device according to claim 1, wherein the two types of mutually different information are each color information.