Display screen visual angle measurement method based on image recognizability

Abstract

The invention discloses a display screen visual angle measurement method based on image recognizability, and relates to the technical field of visual angle measurement. The method comprises the following steps: 1: carrying out equipment installation and test preparation; 2, inputting a standard test image to the tested display screen through a signal generator; 3, changing the measuring point leftwards or rightwards by taking the point P0 as a reference measuring point; 4, carrying out identification degree measurement; 5: carrying out four component function synthesis on the identifiable degree VDL; and 6, carrying out value taking based on the steps, and completing measurement of the visual angle of the display screen. According to the display screen visual angle measurement method based on the image recognizability, the display screen visual angle measurement operation is accurate and convenient, the adaptability is high, the image resolution is high, and the image quality guarantee of display screen watching is obtained by calculating the optimal visual angle.

Description

technical field [0001] The invention relates to the technical field of viewing angle measurement, in particular to a method for measuring the viewing angle of a display screen based on image recognizability. Background technique [0002] At present, the common display screens include: LED (light-emitting diode) display screen, LCD (liquid crystal) display screen, DLP (projection) display screen, and the viewing angle is an important technical index to measure the display effect of the display screen. The display characteristics of the human eye are best seen at the position perpendicular to the display screen, and with the different viewing positions of the screen, the observed screen quality will be lower than that of the vertical plane. The larger the angle between the viewing point and the vertical line of the screen, the worse the viewing effect will be. When the picture quality drops to a certain value, the angle between the viewing position and the straight line perpen...

AI Technical Summary

Problems solved by technology

[0004] The measurement of the viewing angle is the process of determining the included angle through the change of the display quality of the display screen. The viewing angle measurement is very important in the process of product selection, project design, system acceptance, etc. The traditional viewing angle measurement methods are roughly divided into two types: 1. The viewing angle is determined when the brightness value of the screen drops to a certain value (generally, it drops to 1 / 2 or 1 / 3 brightness value); the other is to determine the viewing angle when the screen contrast ratio drops to 10:1. These two methods There are obvious shortcomings. For the display technology that is currently developing rapidly, it has become unscientific to represent the decline of the entire image quality only through the decline of a single image index. Facts have proved that all current display screens can The viewing angle is 178 degrees (almost parallel to the display surface), and the brightness reduction method cannot objectively reflect the human eye's acceptance of image quality degradation, especially for some application scenarios affected by background light reflection, the brightness has not yet reached When it drops to a specified value, the image will be indistinguishable, so the viewing angle measured by these two methods is basically meaningless; therefore, we propose a method for measuring the viewing angle of a display screen based on image recognizability

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