SU1295443A2 - Device for colour displaying of information - Google Patents

Abstract

The invention relates to the recording and reproduction of information and allows to increase the contrast of the displayed information, while reducing control voltages. The deformable gel-like layer 10 of the modulator 7 of the light is connected via a zero bus to the source 14 of the reference voltage due to which near the surface of the layer. 10, most of the induced charge accumulates. When applying to the ribbon electrodes the total voltage of the source 4 of the reference voltage and the sources 1 3 of the control signals, the gel-like layer 10 changes the direction of propagation of light and the deflected light beams go outside the aperture of the opaque output aperture 15, the anamorphic lens 17 on the screen 17 4 forms a narrow light line representing an image of the surface in the plane of visualization. Layer 10. The brightness of the elements of the line is determined by the amplitude of the voltages on the electrodes, 1 slug. p Yu 7

Description

The invention relates to a technique for recording and reproducing information on deformable layers by an electrophotographic method and is an improvement of the device according to the main author. 1080203.

The aim of the invention is to increase the contrast of the displayed information while reducing control voltages.

The drawing shows a simplified optical design of the device.

The device contains a light source 1, a condenser 2, an input diaphragm 3, an anamorphic lens 4, a three-color sectional light filter 5, a full internal reflection prism 6, a light modulator 7 comprising a glass plate 8, a transparent electrically conductive layer 9, a deformable gel-like the layer 10, the electrodes 11 on the second glass plate 12, the sources 13 of the control signals, the source of the 14-reference voltage, the output diaphragm 15, the scanning system 16 and the screen 17.

The device works as follows.

The condenser 2 collects the rays from the light source 1 to the opening of the entrance diaphragm 3, after which the light is collected by the front lens of the objective-anamorphic 4 and directed to the deformable gel-like layer 10 of the modulator 7 of the light through the optical filters 5, the full internal reflection prism 6, the glass the plate 8 and the transparent electrically conducting layer 9. Then the light, reflected from the interface between the gel layer - the air gap, passes for the second time through the gel layer 10, the glass

The connection of the bus of the reference voltage of the source 14 of the constant voltage to all electrodes and the connection of its zero bus to the transmissive electrically conductive layer leads to the fact that in a deformable gel layer the charge distributed over the Debye screening L, which depends - It is not only the concentration of intrinsic charge carriers, but also the concentration of impurities, the magnitude of the applied field, the injection level from the transparent electrically conductive layer. The cumulative effect of these factors leads to the accumulation of a large part of the contamination of the surface of the deformable gel-like layer, which

plate 8, a transparent electrical conduction enhances the contrast of the displayed indian layer 9, a full internal prism 6.

Early reflection and output elements If the constant reference voltage of the objective-anamorphic 4 focus is applied to the electrodes, it is located in the visualization plane on an opaque output aperture 15 JQ wide D. If on the ribbon electrodes 1 with a period of time t, placed on the second glass plate 12, the voltage of the source 14 of the reference DC voltage is applied, and with the period the voltage of the control signals of the sources. 13 control signals, the surface of the gel-like layer 10 is deformed into

with a period, L of electrodes, to which a signal voltage is applied (in general, 7i, r, r), also taking into account that the variable component of the voltage is proportional to exp, then in solving the Poisson equation in the first approximation it can be considered that the entire induced charge is determined mainly by the constant component of the applied voltage. Then when serving

1295443

O

J5

0

five

0

five

0

according to the voltage of the control sources.

fia tape electrodes located with a period of L, it is possible to apply the total voltage of the source of the reference voltage and the sources of control signals. The deformable gel-like layer 10 changes the direction of light propagation and the deflected light beams pass outside the aperture of the opaque exit aperture 15. The transmitted light of the anoyorot lens 4 depicts on the screen 17 as a narrow light line, which in the plane of visualization is an image of the surface gel X layer, and in the plane of compression - the image of the opening of the input diaphragm 3. The brightness of the line elements is proportional to the amplitude of the control voltages on the tape electrodes. The entire image frame can be obtained by scanning the modulated string across the screen using the scanning element 16.

The connection of the bus of the reference voltage of the source 14 of the constant voltage to all electrodes and the connection of its zero bus to the transmissive electrically conductive layer leads to the fact that in a deformable gel layer the charge distributed over the Debye screening L, which depends - It is not only the concentration of intrinsic charge carriers, but also the concentration of impurities, the magnitude of the applied field, the injection level of the transparent electrically conductive layer. The cumulative effect of these factors leads to the accumulation of a large part of the contamination of the surface of the deformable gel-like layer, which

 enhances the contrast of the displayed information.

If a constant reference voltage is applied to the electrodes, the

with a period, L of electrodes, to which a signal voltage is applied (in general, 7i, r, r), and also taking into account that the variable component of the voltage is proportional to exp, then in solving the Poisson equation in the first approximation it is possible assume that the entire induced charge is determined primarily by the constant component of the applied voltage. Then when serving

the voltage of the control signal voltage ponderomotive forces on the electrodes can be obtained by solving the Laplace equation

h

9z fx - about

with boundary conditions mi 0; tf.lz.d., d, a and cos (

f

&.

f.E, -. Ea cjoi;:,;

where E,, Ej is the intensity of the floor in the deformable medium and the gap; ,, - their dielectric

permeability; cf potentials; d is the thickness of the deformable layer;

air gap size;

the amount of induced charge at the air – deformable layer is effective;

The Z axis is perpendicular to the interface, the X axis is parallel. Consequently, the density of the podomotor forces is proportional to

expression

I

R . L.S., 1.11. cosCZfX / A) + .- e, Sh ()

 UoM & i-ie lt- cos (2

ej9ySh (2nl / A)

),

if we neglect the zero component of the second harmonic and assume that

d, then ponderomotorLO

If LP

The forces with a constant source of constant voltage are more than without it.

In most cases, a contrast of more than 10 is considered to be quite acceptable. Taking this figure as the basis and using the above formulas, we obtain an estimate of the maximum possible voltage applied to the electrode.

From the formula it is clear that the strength the sieve is not only a voltage, but also 45 from charge 6, the maximum value of which is determined by the value of the constant component of the potential and. The ponderomotive forces increase because the distance between the charge of 50 GO and the charge on the electrodes when the control signal voltage is applied is determined mainly by the size of the gap, and not by the thickness of the deformable layer, as is the case with the number 55 in accordance with supplied by the field control. Some heightened. In this case, the voltage is also caused by a slight decrease in the size of the gap E,

 exp {2 S-I /. (ffd)

The device can work in the mode of signal subtraction, when the voltage of the constant voltage source creates on the screen 17 the maximum light flux, and the voltage of the control signal decreases

the constant voltage source must be greater and, and the source of the control signal

295D434

The voltage source of the reference voltage should be greater than zero, but should not be arbitrarily large, as in this case the effect of the variable component, which creates a constant illumination on the screen, therefore, the magnitude of the reference voltage is determined from the value of some the permissible background determined by the contrast of the displayed information. Since the device uses the modulated light flux display by the dark field method, the maximum illumination corresponds to the phase shift

ten

is

4 1GA (n

.3,

Where

 - wavelength of light;

and the refractive indices of the deformable layer and the air gap, respectively; And the amplitude of the deformation,

proportional to the tightness of the ponderomotive forces.-g.

exp - 21Г2 / 7.

BUT

27 301 Gl

The luminous flux is blocked by the output imaging aperture 15 of size D, provided that

A a 2f

where f is the focal distance of the system in the visualization plane.

In most cases, a contrast of more than 10 is considered quite acceptable. Taking this figure as a basis and using the formulas given, we obtain an estimate of the maximum possible DC voltage applied to the electrode.

it in accordance with the amplitude supplied. In this case, the voltage

it in accordance with the amplitude supplied. In this case, the voltage

 exp {2 S-I /. (ffd)

The device can work in the mode of signal subtraction, when the voltage of the constant voltage source creates on the screen 17 the maximum light flux, and the voltage of the control signal decreases

it in accordance with the amplitude supplied. In this case, the voltage

the constant voltage source must be greater and, and the source of the control signal 51295443

on electrodes with counter voltage U

ness

 F invention 5

for color selection on auth.St. No. 1080203 that,

by

fO

f

where G is modular

 - periods;

in order to increase the contrast of the bi-directional information while reducing the control voltages, the source of the reference voltage was introduced into it,. a zero bus, which is connected to a transparent electrically conductive layer of a phase-optical light modulator, and a reference voltage bus — to electrodes, while the magnitude of the reference voltage is

Editor I.Nikolaychuk

Compiled by S. Ilchuk Tehred A. Kravchuk

Order 622/58

Circulation 590 Subscription

VNYIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

. Production and printing company, Uzhgorod, Projecto st., 4

is defined by the expression

 exp 2 "Z / TC / (fed),

f

where G is the elastic modulus of the gel layer;

 - the period of location of the electrodes;

E is the size of the gap between the gel-like layer and the electrodes;

 - The dielectric constant of the gap;

D is the width of the diaphragm;

f is the focal distance of an anamorphic object in the information visualization plane;

d is the thickness of the gel-like layer.

Proofreader L. Pilipenko

Claims (1)

The claims 5 Device for color display of information on autosv. No. 1080203 _} characterized in that, in order to increase the contrast of the displayed information while reducing the control voltage, a reference voltage source is inserted into it a zero-bus, which is connected to a transparent 'conductive layer of a phase-1 optical fiber light modulator, and a reference voltage - with electro - ”dams, and the value of the reference voltage U is determined by the expression θ <1) _{ο |)} ί 4θίπ) exp [2ΐ £ / ^] / (f £ d), f where G is the elastic modulus of the gel-like layer; - period of the location of the electrodes; I is the gap between the gel-like layer and the electrodes; £ is the dielectric constant of the gap; • D - aperture width; f is the focal length of the anamorphic lens in the plane of information visualization; d is the thickness of the gel-like layer.