SU1396121A1 - Raised-pattern graphic device for reproducing line information - Google Patents

Abstract

The invention relates to a relief device for displaying line-by-line information and allows improving the quality of display, relief information. The relief information shaper consists of a transparent plate 1. A plate-like layer 3, divided by partitions 4, and transparent control electrodes 2 are placed on the plate 1. A slit aperture 5 with opaque strips 6 is placed against the gel-like layer 3 with a gap It consists of a va-anamorphic lens 10 and a scanning element 11. Electrodes 2 are located under the gel-like layer 3 with a spatial frequency twice that of the partitions 4. Partitions 4 in Made of material not wetted by the material of the gel-like layer 3. 2il. i (L

Description

c 5

W

Od sb

but

tNP

cpus.1

I The invention relates to a technique for recording information on deformable layers by the method of electrography and can be used in devices for displaying information.

The purpose of the invention is to improve the quality of the display of embossed information.

Figure 1 shows the relief scheme of a phonographic device for displaying line-by-line information; figure 2 - scheme to determine the radius of the meniscus gel layer.

The relief device for displaying line-by-line information contains a relief information former consisting of a transparent plate 1 with successively applied transparent control tape electrodes 2 and a gel-like layer 3 separated by partitions 4. Against the gel-like layer 3 with a gap, there are slit diaphragm 5 with opaque bands 6. Tape electrodes 2 are electrically connected alternately through a switching unit with a voltage source 7 and with a common connection point. The parallel light beam shaper consists of a light source 8 and a capacitor 9 located on the side of the plate 1 along the rays. The optical projection system on the relief information screen is made of a cylindrical anamorphic lens 10 and a scanning element 11 placed against the screen 1 2, with the lens 10, the scanning element 11 and the screen 12 are sequentially located behind the aperture 5 along the rays. The partitions A are located in the center of the electrodes 2 connected to the common point of the voltage sources 7. For the fabrication of the partitions 4, a material not wetted by the material of the gel-like layer 3, for example, fluoroplastic, 5-30 microns, is chosen. This makes it possible to obtain on the surface of the Gel-like layer 3 a convex meniscus, the radius of which depends on the distance between the partitions 4 and the marginal angle of the meniscus at the gel-partition boundary. In order to obtain uniform meniscus curvatures of the gel-like layer 3 in all the cells formed by the partitions 4, the liquid phase of the material of the gel-like layer 3 is metered on the plate I between the first 0

15

20

4. In this case, the free surface of the material of the gel-like layer 3 tends to spherical shape C due to a tendency towards a decrease in the surface energy). Thus, when the gel-like layer 3 matures, a convex meniscus is formed on its free surface. The slit diaphragm 5 is made, for example, of a transparent plate on which opaque parallel strips 6 are applied using photographic methods opposite the electrodes 2 connected to the voltage sources 7.

The size of the gap between the diaphragm 5 and the gel-like layer 3 is determined as follows.

The radius (R) of the curvature of the meniscus of the gel-like layer 3 is determined by the degree of the point (P) relative to the meniscus (Fig. 2) by the dependence known from the geometry

25

R - d

 with

(one)

where d I am

On the other hand, the degree of a point is equal to the square of the smallest halfhords, i.e.

R :

(2)

five

where T is the distance between the partitions (or the spatial period of the electrodes 2). From the expression (1) and (2) follows

4g

s

R

t +

(3)

The gel-like layer 3, bounded by partitions 4, forms a cylindrical lens, the focus (f) of which can be determined from the dependence known from geometric optics

f

I

(h -) (-; - + ---)

g, g

(four)

where h is the refractive index of the material of the gel-like layer 3; r, r; g 00 Ie is a plane

plates 1.

Taking into account formula (3), expression (4) looks as follows:

four

(five)

T +

(h-l) 8

Thus, the gap between the gel-like layer 3 and the diaphragm 5 is determined by expression (5). For example

at T 200 microns, tf 5 microns and h "2

the value will be approximately

1000 microns

The relief device for displaying line-by-line information operates as follows.

In the absence of electrical signals on the electrodes 2, each section of the gel-like layer 3 collects light rays, the angle of convergence of which is proportional to the radius of the meniscus curvature, and projects them onto non-transparent strips 6 of the diaphragm 5, while the screen 12 is not illuminated. When electrical signals are applied from voltage sources 7 between adjacent electrodes 2, a tangential electric field occurs that acts on the gel-like layer 3. Under the action of ponderomotive electric field forces, a geometric relief is formed on the free surface of the gel-like layer 3, the depth of which is proportional to the magnitude of wives, applied to the electrodes 2. When this is formed, the geometric relief bends the shape of the meniscus on the surface of the gel-like layer 3, resulting in a luminous flux occurs through the transparent gaps of the diaphragm 5. When you remove the electric floor, the surface of the gel-like layer 3 assumes its original position due to the gel-like layer 3 and the luminous flux are blocked by opaque strips 6 of the diaphragm 5. With the help of the switching unit of the voltage sources 7, they record (they emboss information). Relief information izualiziruyut as a string

lement,

on the screen I 2 as follows. The light flux from the light source 8 through the capacitor 9 in accordance with the recorded information passes through the diaphragm 5. The light flux modulated by the geometric relief is compressed by the anamorph 10 on the length of the image of the linear deformations of the gel-like layer 3 and depicts Record as a string on the screen 12.

element,

Using the scanning element 11, a frame scan of the recording information is carried out. In this case, the recorded information is visualized on the screen 12 in the form of illuminated areas on a dark background.

Claims (1)

Claim A relief device for displaying line-by-line information, containing a capacitor, a relief information former, consisting of a transparent plate with a gel-like layer divided by partitions, and a system of opaque bands located behind the gel-like layer in the direction of the optical rays, and an optical projection system relief information screen consisting of an anamorphic lens and scanning characterized in that, in order to improve the quality of the display of the relief information, transparent control tape electrodes with a spatial frequency twice the frequency of the partitions are placed under the gel layer, and the partitions of the Bbm forms are made of a material not wetted by the material of the gel layer.