Apple Patent Application Reveals Screens Backlit by the Sun
Posted on March 25, 2010 by eli courey
A new Apple patent application revealed this week describes technology that would allow an external light source, like the sun, to provide the backlight for a display, helping to conserve battery life.
The application revealed this week, entitled “External Light Illumination of Display Screens,” notes that current LCD displays can be difficult to view when outdoors in direct sunlight. In addition, it said, it often takes high-powered components to properly light the display. The patent describes a way for a portable computer, like a MacBook, to collect external light to illuminate the computer screen.
One described method would employ a “light harness,” which would serve as a collector of light that would then be displayed onto the screen. This could be done by having the harness reflect light toward the back of the display panel.
In addition to the sun, external light could come from a variety of sources, including an accessory light bulb that could be a part of the mobile computer. The application also mentions such a device could be used in a vehicle, with the screen illuminated by a light inside a car.
The system could also include internal LED light sources that could be used in conjunction with the external light source, if there is not enough light available to properly see the screen.
“The internal light sources may also increase the power consumption of the electronic device,” the application reads. “Therefore, a manifold or other light harness may be used along one or more edges of the display screen in conjunction with or as an alternative to the internal light sources to provide illumination to the display screen by emitting light channeled from an external light source across the display screen.”