Point of view
The viewing angle is a slang term for the direction in which a visual target is viewed. Sometimes the viewing angle is also referred to as viewing angle, which is intended to define the critical angle to the central axis at which a liquid crystal screen can still be viewed (i.e. easily read). Often this limit value is defined by falling below the contrast ratio of 10: 1, although other limit values or also color falsifications could certainly be the reason for a corresponding restriction. High values of 178 ° or ± 89 ° are desirable. For technical reasons, this viewing angle is not only different in the horizontal and vertical directions, but also a function of the azimuth angle of the viewing direction.
In the field of visual displays (engl. Visual displays ), the viewing conditions are specified by the viewing direction or viewing direction. This is the direction between a visual fixation point on the display and an observer assumed to be one-eyed.
The range of directions within which the performance of a display meets certain (application-dependent) requirements (e.g. minimum contrast, minimum luminance, color constancy, etc.) is indicated by the viewing direction range or viewing cone . The viewing or viewing direction is indicated by two polar angles, the angle of inclination theta (with respect to the surface normal through the visual fixation point on the display) and the azimuth angle Phi (with respect to a reference axis in the display area, often the horizontal).
Under angle is understood to mean the eye the deflection of the eyeballs , the maximum angle of view limited field of view (but differs therefrom the visual field ). For each eye alone, the viewing angle is approx. 150 °. By restricting the view, the nose contour for example, the overlapping field of vision and especially the common field of vision for spatial vision is further restricted. For comparison: the viewing zone of the field of view is only 1.5 °.
- Benjamin Schnitzler: The flat screen, the unknown being , netzwelt.de, August 2, 2006
- DIN EN ISO 13406-2: 2003 Ergonomic requirements for activities on optical display units in flat design, Part 2: Ergonomic requirements on flat screens
- c't 2005/22 Kristallmanufaktur - Steps on the way to the direction-independent LC screen