RU2375835C2 - Method of forming raster on screen - Google Patents

Abstract

FIELD: physics; image processing.

SUBSTANCE: invention relates to visual display devices in continuous monitoring systems and can be used for displaying information in processing systems. A beam is formed, spread out and its intensity is digitally varied in resolved time instants, corresponding to the position of the centre of symmetry of the cross section of this beam on the screen in points, those adjacent of which are located on vertices of equilateral triangles, where the resolved time instants are determined by selecting the scanning mode with possibility of determining the number of the frame and type of the basic scanning element.

EFFECT: provision for regularity of the structure of raster for reducing operator fatigue.

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Description

The invention relates to visual indications in continuous monitoring systems and can be used to represent information in processing systems with increased requirements for the protection of health and operability of operators.

There is a method of forming a raster on the screen [1], by which a beam is formed, deployed and its intensity discretely changed, and with a regular deviation of the beam, a raster of hexagonal structure is formed with the displacement of the elements of even lines relative to odd lines, thereby increasing the density of samples of the raster. The disadvantage of this method is the limited functionality to reduce visual fatigue of the operator.

A known method of displaying television image signals [2], in which two successively reproduced fields are formed from each field of the original signal, the first of which is formed from odd and the second from even lines of the active part of the original field, while the frequency of the fields of the reproduced signal is doubled. The disadvantage of this method is the limited functionality to reduce visual fatigue of the operator.

The closest in technical essence is the method of forming a raster on the screen [3], by which an electron beam is formed, it is deployed and its intensity is discretely changed at time points corresponding to the position of the center of symmetry of the cross section of this beam on the screen at points adjacent to which are vertices of isosceles acute-angled triangles. The disadvantage of this method is the limited functionality to reduce visual fatigue of the operator.

The objective of the invention is to expand the functionality of the method to reduce visual fatigue of the operator.

The solution to the problem is achieved by the fact that in the method of forming a raster on the screen, at which the beam is formed, deploy it and discretely change its intensity at allowed time points corresponding to the position of the center of symmetry of the beam cross section on the screen at points adjacent to which are at the vertices of equilateral triangles , and the permitted time points are additionally determined by the choice of a scan type with the possibility of determining the frame field number and the type of the base scan element.

The technical result of the proposed solution is to expand the functionality of the method to reduce visual fatigue of the operator by providing the ability to choose the type of scan, subjectively the most comfortable in long-term continuous observation.

The drawing shows a structural diagram of a possible implementation of the proposed method.

The method is implemented as follows. Decode (1) the input image signal, select (4) frame pulses, select (2) line pulses, which are used to select (3) and store (5) lines. Manually select (7), for example, through trial switching, a subjectively comfortable (for a particular operator in the given environmental conditions long-term continuous observation) type of sweep, determined by the type of the base sweep element (for example, P-type, Hilbert, Peano, etc.), and form (8) signals of raster formation on the screen of, for example, a cathode ray tube, taking into account the number of the field of the frame, and discretely change the intensity of the electron beam by reading (6) the corresponding values from the memory of lines (5) to the allowed e times corresponding to the cross-sectional position of the center of symmetry of the beam on the screen at the points of which are adjacent at the vertices of equilateral triangles. The requirement of equilateral triangles (as opposed to isosceles in the prototype) ensures the same distance on the screen between adjacent points, which gives the maximum regularity of the raster structure, unifying the implementation of all types of basic elements of the scan.

The method can be implemented using standard modules and on an accessible element base. Constructions of a number of blocks can be performed on the basis of constructions of blocks of similar functional purpose up to the coincidence or inclusion of designs of prototype elements and analogues. For example, the designs of blocks 1 ... 6 may coincide with the designs of the corresponding blocks 1 ... 7 according to the patent [2]. The execution of the remaining blocks is determined by their functional purpose and is known by the prototype [3], or is obvious from the prior art. In particular, block 8 additionally determines the allowed time instants according to a certain field number of the frame and the type of the base scan element corresponding to the type of subjectively comfortable scan selected by the operator.

Bibliographic list

1. Patent No. 2037973 (RU). Shaper of information sampling pulses on the screen of a cathode ray tube (CRT) / I.A. Terekhov // 19.06.95.

2. Patent No. 2245002 (RU). A method of displaying television image signals in a HDTV receiver / A.S. Mkrtumov // 01.20.2005.

3. Patent No. 2097936 (RU). The method of forming a raster on the screen / I.A. Terekhov // 11.27.1997.

Claims (1)

The method of forming a raster on the screen, in which a beam is formed, deploy it and discretely change its intensity at allowed times corresponding to the position of the center of symmetry of the cross section of this beam on the screen at points adjacent to which are at the vertices of the triangles, characterized in that the triangles are equilateral , and the permitted time points are additionally determined by the choice of a scan type with the possibility of determining the frame field number and the type of the base scan element.