LUMINOUS PLATE Russian patent published in 2008 - IPC G09F13/18 

FIELD: physics, illumination engineering.

SUBSTANCE: luminous plate with frontal illumination contains a lightguide panel element made of transparent material, photodiode illuminant placed so that light beams emitted by the illuminant go to lightguide panel element through its edge, also it contains a dot matrix light output structure formed on the front surface of the lightguide panel element. Gapes d₁ and d₂ between near points of dot matrix light output structure, correspondingly vertically and horizontally are selected from the condition of visual fusion of indicated points and don't execeed values d₂=L·tg(α), where: H - height , on which the luminous plate is supposed to place, h - height of observation, L - predetermined minimum distance, horizontally measured, and from which points of dot matrix structure visually interfused, α - 1/60 degree (eye's resolution of an observer for normal acuity of vision).

EFFECT: attainment of 'continuity' effect of illuminated surface of luminous plate.

2 cl, 1 dwg