JPS5851335A - Detection system for coordinate position information - Google Patents

Abstract

PURPOSE:To detect pieces of information on position coordinates X and Y through simple hardware on light beam matrix system, by detecting the coordinate (X, Y) position, which is shielded from a light beam, from time relation in a scanning period. CONSTITUTION:The optical fiber array 2X and 2Y for transmission receive light from a light source 1 and transmit the light beams from plural optical fiber ends arrayed at necessary intervals along of respective sides of an X-Y coordinate plane 5; and optical fiber arrays 3X and 3Y for photodetection are arrayed along the other sides of the coordinate plane 5, and receive the light beams from the arrays 2X and 2Y. Then, a scanning type detector 4 extract and scan the light beams from the arrays 3X and 3Y as shown by an arrow A to detect a coordinate (X, Y) position.

Description

[Detailed description of the invention] The present invention relates to a coordinate position information detection method.

While interacting with the comviator in a more natural way.

Due to the desire for more efficient use, there is a growing desire to input data by directly touching the data on the CRT display surface with a finger, without using a conventional light pen. The same applies to optical projection displays.

Also, in a book type multi-item key manual device.

There is also a growing demand for freely arranging item fields such as 9 rows and 9 columns without being constrained by the structurally fixed key positions as in conventional systems.

As an input method to a CRT display or the like, a method using a transparent resistance matrix for input position detection, a method using sound wave propagation time, etc. have been attempted. In addition, methods that use light are very useful for applications that require manual page turning, such as multi-item key manual methods, and light beam matrix methods and light beam scanning methods using light emitting diodes and photodetector diode arrays. has been proposed, but it has not been put into practical use due to low single-position reading accuracy and complicated logic.

The present invention provides means for detecting X and Y position information with high accuracy using simple hardware using a light beam matrix method.

FIG. 1 is a configuration diagram of an embodiment of the coordinate position information detection method of the present invention, where l is a light source, 2X and 2Y are optical fiber arrays for transmitting light in the X and Y directions, and 3X and 3Y are optical fiber arrays for transmitting light in the X and Y directions. A light receiving light 7 eyeper array in the Y direction, 4 a scanning photodetector, and 5 a coordinate plane.

The light transmission optical fiber arrays 2X and 2Y take in light from a light source 1, send out light beams from the ends of a plurality of optical fibers arranged at required intervals along one side of each of the x and y coordinate axes, and , the light-receiving optical fiber arrays 3X and 3Y are x
, y-coordinate axes, and receive the light beam at the ends of several optical fibers of the light transmitting optical fiber arrays 2X and 2Y, and also serve as scanning photodetectors.

Although not shown in Figure 1, a suitable optical element is installed at the tip of the optical fiber arranged on the X and Y axes to form a beam of light. It will only reach 7 eye per.

Here, when the intersection point 1 of the light beams, for example P, is touched by a finger or the like, the photodetector 4 detects the presence or absence of light, and the x
, Y coordinates can be easily determined using a known simple logic circuit from the time relationship during one scanning period.

FIG. 2 is a time chart according to an embodiment of the present invention showing this situation, and point P in FIG. 1 is X4. This indicates that it is Y3.

In the above, a high-intensity light source such as a high-intensity light emitting diode or a xenon discharge lamp is suitable for the light source 1.

Pulse driving may be performed if necessary.

The scanning photodetector 4 may be one-dimensional or two-dimensional.
A MOS or CCD solid-state image sensor, Vidico 7, etc. can be used. All of them are widely used in facsimiles, video cameras, etc., and have high sensitivity and reliability, and their practical value is great.

As the original fiber, it is sufficient to use a plastic type fiber that is inexpensive and easy to handle, and one having a diameter of about 0.1 to 0.5 mm can be used as appropriate.

Even if the fiber has a large optical loss per standard length because the distance is short, the amount can be ignored from a system perspective. X,
As the Y position determination logic circuit, a CRT display controller processor or the like may be used, and this can be done by adding a small amount of programming.

The present invention can have many embodiments in terms of signal detection methods and structures, which will be described in sequence below.

As already explained in Fig. 1, both the light source and photodetector are used in common for the X and Y axes, and in this case, light is applied simultaneously to all the optical fibers in parallel, and the receiving side is connected to the KX axis during l scanning period. This is a bit division method in which detection is performed in the order of the Y axis. Figure 3 (&) is an example of a time division method, with light sources IX and I for the Y-axis and Y-axis respectively.
They are provided separately like Y, and light is sent out alternately on the Y-axis and Y-axis in a time-division manner, and the detection side is arranged spatially in parallel. The respective symbols are the same as in FIG. 1, and the subscripts mean those of the X-axis and Y-axis, respectively. According to this method, the bit capacity of the photodetector can be reduced. The fourth method is useful for improving spatial resolution.

Since the principle is the same for both the Y-axis and the Y-axis, a case will be described in which light is emitted in four parts on the Y-axis.

11, 12, 13, and 14 are light sources that sequentially emit light with a period T. In this way, for example, even if the light beam reaches an adjacent receiving fiber for which it is not originally intended, as shown by the chain gutter, during the time when the light source 12 is emitting light, the receiving side will still be able to determine whether it is P or P'. Therefore, identification is possible even if the distance between the optical fibers is narrow, and conversely, if the distance between the optical fibers is the same, the optical element can be simplified.

Grouping as explained above is a similar means of improving spatial resolution, but instead of time-division identification, it is possible to use a light source with a different wavelength for each group, or add a color filter to white light. It is also possible to do this by making the wavelength of the transmitted light unique, and by providing a corresponding wavelength filter on the grouped source fibers on the light receiving side to identify it as a source of R vehicle interference.

Figure 5 shows a coordinate plane divided into multiple parts, and each plane has optical fiber arrays 2X, 2Y for transmitting light, and optical fiber arrays 3X for receiving light.
, 3Y to configure multiple light beam matrices, and X in different planes.

This makes it possible to detect Y position information. That is, the optical fiber array 2.3 is divided into two sets, and one set of light sources 1.
．． The photodetector 4 can obtain the X and Y position information of the book-type multi-item key manual device coordinate plane 5a and the CRT display coordinate plane 5b, respectively. This can be achieved by using optical fibers.

An important point in implementing the present invention is to construct a narrow light beam.

As an example, the method can be appropriately selected depending on the method of constructing a general spherical lens array by integral molding of plastic, the beam format using a pinhole, the cicada light output light receiving sensitivity, etc.

As explained above, according to the present invention, the configuration is simple and the arrangement of input data items in rows and columns can be freely matched by software, so 1. The degree of freedom in input items, arrangement, etc. is extremely large. As a result, an optimal input system can be constructed.

2. In a book-type multi-item key manual device, there is no need to make a hole in the book for the key, so it is simpler, and the number of items can be increased by the space provided.

3. Prior art page detection functions and software provide the freedom to change the layout of rows and columns for each page.

4. There is no additional material on the surface where input instructions are given.

Extremely advantageous for maintenance and handling.

It is possible to obtain great practical effects.

[Brief explanation of drawings]

Figure 1 is a block diagram of an embodiment of the coordinate position information detection method of the present invention, Figure 2 is a time chart according to the embodiment of Figure 1, and Figures 3 (a) and (b) are FIG. 3 is an explanatory diagram of another embodiment of the coordinate position information detection method, in which (&) is a main part configuration diagram of the time division method, (b) is a time chart according to (a), and , FIG. 4 and FIG. 5 are explanatory diagrams of other embodiments of the present invention, in which FIG. 4 shows a case where the light source is driven in N-phase time division, and FIG. 5 shows a case where a plurality of Q) optical fiber arrays are used. Each case is shown below. Symbol explanation Fiber array, 4: Scanning photodetector, 5°5 a @
5 b: Coordinate plane 4I Applicant Advance Co., Ltd. Figure 1 Figure 2 Exclusive 7469-≠ Figure 3 CLI ω Figure 4

Claims (1)

[Claims] 1. In the method of detecting the coordinate (X, Y) position by detecting that the IJ Fuchs intersection is blocked, the light source Take in the light from the X. Each optical fiber array for transmitting light transmits a light beam from the end of a plurality of optical fibers arranged along one side of each of the Y coordinate axes; A plurality of optical fibers associated with the ends of the plurality of optical fibers of the optical fiber array (each light receiving optical fiber that receives the light beam at the end of the array, and a light beam from the receiving optical fiber array) Take out and coordinates (X, Y)
A scanning type photodetector is equipped with a scanning type detector that detects the position. Locus II (X, Y) position where the light beam is blocked. A coordinate position information detection method characterized by detecting from a time relationship during a scanning cycle. 2. A plurality of combinations of each of the light transmission optical fiber arrays and each of the light reception optical fiber arrays are provided, and x and y coordinate position information in different planes is detected, respectively. The seated image position information detection method described in Section 1. 3. The coordinate position information detection method according to claim 1 or 2, characterized in that the scanning detector is used to detect both X and Y coordinate wheels in a bit-divided manner. 4. The coordinate position information detection method according to claim 1 or 2, characterized in that the scanning type detector is used in common for both KX and Y coordinate wheels on a time-sharing basis. 5. The number of optical fibers in each of the light transmission optical fiber arrays and the light reception optical fiber arrays is N (however, N is 1
or plural), one set for every other set, and the light source Y:N (however, N is l or plural) phase time-divisionally driven, corresponding to each set, and the scanning photodetector detects the cycle corresponding to each set. A coordinate position information detection method according to any one of claims 1 to 4, characterized in that: 6. In each of the optical fiber arrays for transmitting light and the optical fiber arrays for receiving light, N (N (however, N is 1 or more)) every other VC set is set, and the wavelength of the transmitted light is changed for each set, 5. The coordinate position information detection method according to any one of claims 1 to 4, characterized in that a corresponding wavelength filter is provided on the light receiving side.