A new Apple patent at the US Patent & Trademark Office shows that Apple is looking at developing new edge-lit backlight displays for Macs and its iOS devices. Patent number 20100321609 is for an edge-lit backlight unit with a thin profile. The invention relates generally to backlight units of electronic display panels, such as liquid crystal displays.
An edge-lit backlight unit for a display is provided per the patent. In one embodiment, the backlight unit may include a light guide configured to receive light from a source and emit such light in a broad distribution to a turning film disposed over the light guide. The turning film may be configured to redirect light received from the light guide toward a normal of the turning film.
In one embodiment, the light guide may be configured such that peak light distribution therefrom occurs at an incident angle of approximately sixty degrees, with broad light distribution substantially occurring over an angular range...| Read more »