Arrangement to reduce influence of diffuse and direct reflections in a display device based on a source of light emitting in a narrow band

摘要

An arrangement for reducing influence of diffuse and direct reflections in a display device based on a light source emitting in a narrow band said display device comprising an absorption filter (25) having a pass band enclosing the center frequency of the light source (11) said absorption filter being placed in the beam path between the light source (11) and the observer (14) and immediately adjacent reflecting means (24), the bandwidth of the filter (25) being wider than the bandwidth of the light source (11), but considerably narrower than the spectral bandwidth of the eye.