SU441725A1 - Image dubbing device - Google Patents

Description

The invention relates to the field of automation and computer technology and can be used in devices that perform input of images to CM or transmit and reproduce them at a distance.

A device for rewriting an image is known, comprising a dielectric plate having a corresponding shape, along the edges of which electrodes are located, an electronic switch connecting a generator of interrogating pulses to the corresponding pairs of electrodes, and a conductive point contacting the plate surface.

The purpose of the invention is to reduce the distortion of the reproduced image around the periphery of the tablet.

This is achieved by positioning the contact terminals along the edge of the dielectric plate and selecting the ratio of the width of the contact terminals, measured along the plate contour, to the gap between them from I to 3.

 Figure 1 shows the functional diagram of the device; Org.2 is an example of a geometrical arrangement of contact terminals along the contour of a dielectric plate.

The functional diagram of the device (fig. 1) contains a plate I, made in the form of a dielectric plate, a set of contact terminals 2-43 distributed along the contour of the tablet, electrical voltage switches 44-47, a pulse generator 48, a conductive probe 49 and a converter 50 electrical voltage to the visual image.

The contact terminals 2-12 are connected to the positive pole of the constant voltage source through the contacts of the switch 44, and the contact

terminals 24-33 through the contacts of the switch 46. Accordingly, the contact terminals 13-23 are connected to the negative pole of the constant-voltage source through the contacts of the switch 44, and contact terminals 34-43 through the contacts of the switch 47, to simplify the number of contact terminals and the corresponding The number of contacts of switches in FIG. 1 is not fully shown.

Switches of electrical voltage are connected to the outputs of the generator 48 pulses,

A conductive point probe 49 connected, for example, in the form of a pencil with an irafdtovym rod, is connected to the tablet. The output of the probe is connected to a transducer of 50 electrical pulses into a visual image.

The device works as follows.

The pulse generator periodically and alternately connects to the opposite terminals 2-G.13.13; 23 and 24-33 34-43 the positive and pronounced poles of the DC source, creating an electric field between the corresponding pair of contacts. Since each pair of contact terminals of one group, for example, 2–12, 13–23), which are opposite each other, is located opposite to the contact terminals of another group (24–33, 34–43), the electric field lines form a Cartesian coordinate system .

When installing the probe in any point of the tablet in it, a pair of electric current pulses, the amplitude of which depends on the coordinates X and At the point of contact of the tablet probe, is outputted. The output signals of the probe come in converting electric pulses into a visual image. The latter is intended for the pulses corresponding to the x coordinate, from the pulses corresponding to the y coordinate, shape the x coordinates and the point of tangency of the tablet and then transfer them to inverse transformation into a visual image.

FIG. H shows a portion of the gdp of a molded tablet (hatched) and

located along the contour of the tablet contact terminals lD, Xj;, I2 and 24,25,26. The ratio of the width of any of the terminals to the gap between the two terminals is equal to 3. It is also significant that Tetch 10, And 12 and 24,25,26 are in contact with the dielectric plate of the tablet on a very small part of their surface.

The advantage of this arrangement of contact terminals is that when, for example, terminals 24,25,26 N € are supplied to a source of constant voltage, then the existing resistance by the two adjacent terminals of the bolto, in the opposite case, when the same terminals Connected to the indicated source, this sophistication becomes small, as if directly connected by itself. The latter leads to the fact that the electric field lines are not distorted - and at any point of the tablet remain orthogonal to each other.

Subject And: 3 acquiring.

A device for rewriting images, containing, not a square, made in the form of electrical modules; extra plates, a set of contact terminals distributed along the contour of the tablet, crimping. 1. voltages of electrical voltages, each associated with two pairs of electrodes and controlled a pulse generator and a transformer of electrical voltages into a visual image; e, connected to the wire using a Tactile probe, characterized in that, from reducing the distortion of the reproduced image on the periphery of the tablet, the contact clamps are located enes on the edge of the dielectric plate, and the ratio of the width of the terminals, as measured along the contour of the plate, to the Ind ezhutku between them should be in the range from I to 3.

. , 1, r

f44J UUUUUUUULJ-J3 1312 25 2B 27 28 29 3D 31 32

01 / 2.7

..ir72 &

  -i

  --- .-.