JPS61296421A - 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 reading out respectively different code patterns in respective sections obtained by dividing the coordinate plate by a coordinate indicator to detect the absolute coordinates of the coordinate plate. CONSTITUTION:The coordinate plate 1 is divided like a matrix to array many fine sections 2 corresponding to respective coordinate points and respectively different code patterns drawn in respective sections 2 are read out by a pattern reading part 6 by moving the coordinate indicator 3 arranged on the coordinate plate 1. The read raw data 11 are sampled by a sampling pulse 15 and recognized as a pattern 12 by a pattern recognizing part 7 and the sample value is led into an X-Y coordinate extracting part 8. The extracting part 8 executes the X-Y separation and coordinate value conversion of the sample value to detect X and Y coordinate values 13a, 13b. These coordinates values are converted into serial signals 14 through a parallel/serial conversion part 9 and the serial signals 14 are sent to a host as absolute coordinate information.

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 object into the main machine, and in particular, 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 object to the main machine, and in particular, the present invention is an inexpensive device that can reduce the influence of disturbances etc. This makes it possible to easily obtain accurate absolute coordinates on the coordinate board without any interference.

[Prior art]

This type of coordinate input device from Sakurai includes one that detects the movement of coordinates from the rolling of a pole, one that detects absolute coordinate values using the magnetostrictive effect, as well as optical, electromagnetic induction, and pressure-sensitive types. There are various methods such as mechanical ones, but the mechanical ones have the disadvantage of insufficient durability and precision.
The magnetic type also has some drawbacks, such as being complicated and expensive, and being susceptible to external disturbances.

〔the purpose〕

The object of the present invention is to eliminate the above-mentioned conventional drawbacks.
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An object of the present invention is to provide a coordinate input device that can obtain absolute coordinate values with sufficient accuracy without receiving rrsWm.

[Key points of the invention]

The coordinate input device of the present invention is capable of detecting absolute coordinate values using a coordinate indicator commonly called a mouse, which previously could only detect relative coordinate movements, and is similar to an absolute coordinate reading device generally called a digitizer. In order to achieve the above-mentioned purpose with an inexpensive configuration without requiring a detection section with a complicated configuration, the coordinate plate is divided into a matrix, and each section corresponds to a coordinate point, and each section has a different code pattern, etc. By arranging patterns and reading different patterns using a coordinate indicator, the absolute coordinates of the coordinate plate can be detected.

〔Example〕

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

First, the external appearance of one embodiment of the coordinate board and coordinate indicator, which constitute the main parts of the coordinate input device of the present invention, is shown in FIG.
In the device of the present invention, a coordinate plate 1 is divided into an x-y matrix, a large number of minute sections 2 corresponding to each coordinate point are arranged, and a coordinate indicator 3 placed on the coordinate plate 1 is moved. The absolute position coordinates of each coordinate point are detected using different code patterns drawn in each section 2, and the coordinate information is sent as a serial signal to the main machine, that is, the host side.

As shown in FIG. 2, on the top surface of the coordinate plate l, different code patterns are drawn for each of the many micro sections 2 divided into a matrix. 2 corresponding to the X-Y coordinates
For example, it is preferable to use a bar code representing a brigadier general's rank.

Further, a coordinate indicator 3 placed on the coordinate board 1 to indicate the coordinates of each section 2 is constructed as shown in FIG. That is, inside the coordinate indicator 3, there are provided a light emitting element 4 for illuminating each section 2, and a light receiving sensor 5 for reading the code pattern of each illuminated section 2.

Here, the light emitting element 4 is, for example, an LED.

It is also possible to use a tungsten lamp, a semiconductor laser element, etc., or a fiber scope that introduces such a light emitting element as a light source.

Further, as the light receiving sensor 5, for example, a COD or MOS area sensor is used to read the code pattern.

With this configuration, the code pattern read by the light receiving sensor 5 is unique in the entire area of the coordinate plate 1, so that the X-Y coordinate values of each coordinate point can be absolutely detected.

An example of a circuit configuration for performing absolute detection of such coordinate values is shown in FIG.

In the illustrated configuration, first, the raw data 11 read by the pattern reading section 6 configured as described above is supplied to the pattern recognition section, and the sampling pulse 15 from the host 10 is supplied to the pattern recognition section.
It is guided to the coordinate extracting section 8 by sampling it.

The X-Y coordinate extractor 8 subjects the sample value to XY separation and coordinate value conversion to detect an X coordinate value 13a and a Y coordinate value 13b. Next, these coordinate values 13a and 13b are led to a parallel/serial (P/S) converter 9, where they are converted into a time-series serial signal 14 and sent to the host 10 as absolute coordinate information.

In the above embodiment, the light receiving sensor 5 is replaced by the coordinate indicator 3.
The structure was designed to directly receive the reflected light from the code pattern of each illuminated section, but it was also configured to use an optical fiber scope to guide the light to an area sensor, etc. placed in another location and receive the light. You can also. With such a configuration, the degree of freedom in the arrangement of each element 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 as desired.

〔effect〕

As is clear from the above explanation, the present invention coordinate input + speech deafness [
-Matsui Il ↓ In addition to obtaining the captivator's provocation, it is also easy to detect the absolute coordinates of each coordinate point, so the configuration of the coordinate detection means can be integrated into the cylinder, making it an inexpensive coordinate input device. A special effect can be obtained in that it becomes equilibrative to realize.

Note that by arranging a plurality of coordinate indicators on the coordinate plate, it is possible to simultaneously detect a plurality of coordinate values independently without changing the configuration of each device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the main parts of the coordinate input device of the present invention, FIG. 2 is a line diagram showing an embodiment of the configuration of the coordinate plate, and FIG. 3 is a diagram showing the coordinate indicator of the coordinate input device. FIG. 4 is a sectional view showing an embodiment of the configuration, and FIG. 4 is a block diagram showing an embodiment of the signal processing system. ■...Coordinate board? ...Minute section, 3...Coordinate indicator, 4...Light emitting element, 5...Light receiving sensor. 6... Reading section, 7... Recognition section, 8... X-Y coordinate extraction section, 9... Parallel/serial (P/S) conversion section, lO.
...Main machine (host system). 3 Coordinates Finger Claw Diagram 1 " 3 Polished Finger Claw World Diagram 3" 5 Diagram 4

Claims (1)

[Claims] 1) A coordinate board in which different information is arranged in each section divided into a matrix in correspondence with each coordinate point, and the information of the section is detected by moving on the coordinate board. A coordinate input device comprising: a coordinate indicator having a detection means; and means for identifying absolute position coordinates corresponding to the section based on the different information. 2) The coordinate input device according to claim 1, wherein the information is a code pattern.