KEYBOARD AND KEYBOARD UNIT

摘要

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