A keyboard or keypad which can highlight symbols on the keys by illuminating them. The keys are backlit by two light sources, one visible and one ultraviolet, each of which illuminates multiple keys. One symbol on each key is designed to transmit the visible light, becoming highlighted when ...
For example, astrology, religion, printing and computer fonts, road signs, or law symbols may be used. Cell content 106 may be any color including black, white or shade of gray. Cell content may also be a logo of a company or product name or trademark. Any type of cell content may ...
A keyboard or keypad which can highlight symbols on the keys by illuminating them. The keys are backlit by two light sources, one visible and one ultraviolet, each of which illuminates multiple keys. One symbol on each key is designed to transmit the visible light, becoming highlighted when ...