SU1751739A1 - Device for inputting information - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used as a pre-screen panel in tablets, keyboards. The purpose of the invention is to improve the accuracy of determining the coordinates of input points. The goal is achieved by forming an optical lattice. The optical lattice for determining the location of the tactile pointer in the working area of the X coordinate is formed by the radiation source 1, the translucent mirror 2 and the reflector 3 parallel to it. At an angle close to 90 ° to the translucent mirror oriented along the axis X, the radiation source is directed . Reflecting between the translucent mirror and the reflector, the beam forms an optical grating that fills the working area. The lattice spacing is determined by the angle of incidence of the beam on the translucent mirror. At the points of reflection luso with

Description

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From the semitransparent mirror, on its back side, are the ends of the optical fibers transmitting the energy of the radiator to the radiation receiver. 2 Il.

The invention relates to automation and computer technology and can be used to connect an operator with a display as a pre-screen panel and as part of tablets, which are used in keyboards.

A device for inputting information is known, which contains a panel with a matrix of channels of rows and columns, sources and radiation receivers placed against the channels of the matrix, and recesses are made on the surface of the panel at the intersections of the channels of rows and columns of the matrix.

The disadvantage of this device is the low accuracy of determining the coordinates.

It is also known a device comprising a line of optical emitters and a line of optical radiation receivers with mechanical elements, when pressed, which overlaps the corresponding light beams with fixing the number of the element.

The disadvantages of this device are the low accuracy of determining the coordinates and the presence of mechanical elements that complicate the manufacturing technology.

Closest to the present invention is a device comprising first and second groups of radiation sources optically coupled to receivers of the first and second groups, while the outputs of the first and second groups of radiation receivers are connected to the inputs of the first and second groups of amplifiers. groups connected to the outputs of the decoder, a pulse generator, the output of which is connected to the input of the counter, the outputs of which are connected to the inputs of the decoder, selector, multiplexer, the inputs of which are connected to the outputs amplifiers of the first and second groups.

A disadvantage of the known device is the low accuracy of determining the coordinates, due to the limited number of pairs of emitters and receivers, as well as their considerable physical dimensions.

The purpose of the invention is to improve the accuracy of determining the coordinates.

This goal is achieved by the fact that in a device for entering information, containing sources of optical radiation, a pulse generator, two mutually

perpendicular mirrors located along the axes of coordinates, with corresponding two reflectors parallel to them, two optical fibers made of optical fibers, a receiver optically coupled to radiation sources, the output of which is connected to the amplifier input, an analog-to-digital converter, two coordinate registers and counting trigger, and each

of the optical fibers, one ends of the optical fibers are perpendicular to the corresponding translucent mirror along its length, the other ends of the optical fibers are bundled and located at the receiver, the output

which is connected to the input of the amplifier, which by its output is connected to the input of an analog-digital converter, the output of which is connected to the input of the coordinate registers, the control inputs of which are connected to the outputs of the counting trigger, the input is connected to the radiation sources.

The introduction of semi-reflective mirrors and reflectors provides the possibility of forming an optical lattice for determining the coordinates along one of the axes from a single radiator and having a step defined by technological capabilities.

manufacturing and much smaller physical dimensions of the used emitters and receivers. In addition, the use of fibers of different diameters can significantly improve the accuracy of determining

coordinates:

FIG. 1 shows a device for inputting information; in fig. 2 is an optical lattice formation scheme.

The device contains emitters 1

(e.g., Hummingbird semiconductor lasers) optically coupled to semitransparent mirrors 2 and reflectors 3, optical fibers 4 optical fibers 5 and 6. The output of radiation receiver 7 (e.g. FT-1K),

connected to the amplifier 8, the output of which is connected to the input of the analog-digital converter 9, the outputs of which are connected to the inputs of registers 10 and 11, the control inputs of which are connected to

the outputs of the counting trigger 12 and the inputs of the emitters 1. and the input is connected to the output of the generator 13 pulses.

The device works as follows.

The pulses of the generator 13 of the rectangular pulses are fed to the input of the counting trigger 12, which forms the alternating excitation pulses of the emitters 1, which due to the optical communication with the translucent mirrors 2 and the reflectors 3 form the optical lattice (Fig. 2). A portion of the energy of the emitters through the semitransparent mirrors 2 and the optical fibers 4 of the optical fibers 5 and b goes to receiver 7. The signal from receiver 7 is amplified by amplifier 8 and fed to the input of analog-digital converter 9, from the output of which the code goes to registers 10 and 11 of the coordinates and is written to the corresponding of them, depending on the state of the counting trigger 12, in the absence of a tactile indicator 14 within the coordinate plane of the device (Fig. 2), the signal from the output of the amplifier 8 is maximum. In the presence of a tactile indicator 14 (Fig 2) in the In the x-plane of the coordinate plane, the energy beam propagates to the tactile indicator 14 and further to the nodes of the optical lattice. Thus, the signal at the input of the amplifier 8 is an integral characteristic of the energy flux transmitted by the optical fibers 5 and 6 and determines the coordinate of the beam intersection point. X or Y.

In comparison with the known ones, the proposed device makes it possible to increase the managed information capacity of the display screen, and also due to the absence of discreteness in the determination of coordinates, it allows to enter graphic information, to imitate various marker control devices.

Claims (1)

An apparatus for inputting information containing sources of optical radiation, a pulse generator, a radiation receiver optically coupled with sources of optical radiation, characterized in that, in order to improve the accuracy of determining the coordinates of input points, two mutually perpendicular semi-transparent mirrors are introduced into the device and two reflectors parallel to them, optical fibers, the output of the receiver of optical radiation is connected to the input of the amplifier, the output of which is connected to the input of the analog-digital converter The outputs of which are connected to the information inputs of the first and second registers, the synchronous inputs of which are connected to the first and second inputs of the counting trigger, respectively, the output of the pulse generator is connected to the input of the counting trigger, the outputs of which are connected to the inputs of the optical radiation sources, and one ends of the optical fibers are perpendicular to the corresponding translucent mirror along its length, the other ends of the optical fibers are located at the receiver of optical radiation.