KEYBOARD AND KEYBOARD UNIT Russian patent published in 2012 - IPC G06F3/02 

FIELD: physics.

SUBSTANCE: keyboard has a light-guide panel for propagating light through it as a result of total internal reflection; a film on top of the light-guide panel, wherein there is an air layer between the film and the light-guide panel; a plurality of buttons lying on the top surface of the film; and a plurality of reflecting structures formed on the light-guide panel and lying at a distance from each other for output of part of the light directed through the inner part of the light-guide panel towards the buttons.

EFFECT: ensuring high and uniform illumination brightness of the keyboard with low power consumption and low costs.

255 cl, 5 dwg