CS217587B1 - Optoelectronic liquid crystal coordinate display - Google Patents

Abstract

The invention relates to an optoelectronic coordinate display with liquid crystal, especially of matrix type, in which the critical number of rows and columns is exceeded. For displaying, for example, a coordinate system, the cross effect is used. When the operating voltage is connected to the i-th row and j-th column, a point is displayed at the intersection of these electrodes and further points at the intersections of other electrodes with the i-th row and j-th column forming the arms of the cross emanating from the intersection of the i-th row and j-th column. In this way, it is easy to display, for example, a coordinate system, various tolerance fields, define the field of view or format for various physical, geodetic and other devices without the use of complex external circuits.

Description

The invention relates to an optoelectronic liquid crystal coordinate display device, in particular of the matrix type, in which a critical number of rows and columns is exceeded.

To display a line segment for matrix type display elements made up of m-rows and n-columns of intersecting electrodes, it is necessary to apply voltage to the i-th row and to all (or several adjacent) columns. To display a point, just apply stress to the appropriate i-th row and j-th column. Relatively complex external electronics must be used to display two intersecting lines or lines.

These drawbacks are overcome by the solution of an optoelectronic liquid crystal coordinate display device, in particular of the matrix type, consisting of electrode support plates, the essence of the invention is that on one plate there are column electrodes and on the other plate row electrodes in supercritical numbers. an active medium, such as a liquid crystal, is placed through the electrodes.

The solution according to the invention allows the display of two or more intersecting lines or lines without the use of complex external electronics. It is sufficient to apply sufficient voltage to the respective rows and columns of the component where the critical number of rows and columns is exceeded.

An example of the use of a cross-phenomenon in a liquid crystal matrix display element is shown in Fig. 1. The liquid crystal is positioned between a row and column electrode system that crosses each other and lies in two planar parallel planes. A cross-section of a possible embodiment of a nut component utilizing the phenomenon of the invention is shown in Fig. 2.

Applying the appropriate voltage to the i-th row and j-th column, one point is displayed at the intersection of these electrodes and then the cross arms formed by the points on the remaining portions of the electrodes.

Two sets of electrodes are formed on two substrate plates, one of which comprises the i-th row 1 and the other the j-th column 2 - Fig. 2. The row electrodes are located on one and the column electrodes on the other side of the active medium 4. Operating voltage is applied between these electrodes. Due to the action of liquid crystal 4 located between the electrodes, point 6 is displayed and the cross arms formed by points 7 - Fig. 1 are shown. The arms of the cross are shown more clearly the higher the number of rows and columns and the flatter the the operating voltage of the component. The distance between the electrodes is set by the peripheral ring

5. For each of the electro-optical phenomena existing in liquid crystals, a critical number of rows and columns can be determined, beyond which a cross effect will occur and, apart from the point at the intersection of the respective electrodes, the arms of the cross will be displayed.

The cross effect occurring with liquid-crystal matrix display components can be used to display two or more intersecting lines or lines. In this way, you can easily display, for example, the coordinate system, different tolerance fields, delimit the field of view or format for various physical, geodetic, and other devices without using more complex external circuits.

Claims (1)

SUBJECT Optoelectronic liquid crystal coordinate display, in particular of matrix type, consisting of electrode support plates, characterized in that on one plate (3) there are column electrodes (2) and on the other In accordance with the invention, the plate (3) is a supercritical number of row electrodes (1), and an active medium, such as a liquid crystal (4), is disposed between the electrodes (2, 1).