Patent ID: 9064465
Filing Date: 2015-06-23
Classification: G09G

Abstract:
1. An electronic device comprising: a homochromatic liquid crystal display; a color liquid crystal display; a backlight including a light-pipe; the homochromatic liquid crystal display, the color liquid crystal display and the light-pipe being positioned in overlapping relation to each other, the light-pipe arranged to direct light through both the homochromatic liquid crystal display and the color liquid crystal display; a homochromatic liquid crystal display driver, coupled to the homochromatic display, to generate an image on the homochromatic liquid crystal display in response to an image signal; a color liquid crystal display driver, coupled to the color liquid display, to generate an image on the color liquid crystal display in response to an image signal; a light sensor arranged to generate a light control signal in response to ambient light incident on the light sensor; and a processor receiving the light control signal and coupled to the homochromatic liquid crystal display driver and the color liquid crystal display driver, the processor operable to selectively provide an image signal to the homochromatic liquid crystal display driver or to the color liquid crystal display driver dependent on the light control signal, wherein the processor is arranged to forward the image signal to the homochromatic liquid crystal display driver in response to a level of ambient light incident on the light sensor being above a predetermined level and forward the image signal to the color liquid crystal display driver in response to the level of ambient light incident on the light sensor being below the predetermined level.