Ambient light sensing for display

摘要

Devices such as electronic book readers, televisions, and so forth may use reflective display technologies. Described herein are devices and methods for ambient light sensing for use in conjunction with displays. A light guide panel is coupled to a light sensor to measure ambient light impinging on the light guide panel. Where the display is reflective, the light guide panel may be configured to provide for illumination of the display.

主权项

1. A device, comprising:
an electrophoretic display panel comprising a front side configured to present information to a user; one or more illuminators; a light guide panel optically coupled to the front side of the electrophoretic display panel and to the one or more illuminators and configured to distribute at least a portion of light emitted from one or more illuminators to the front side of the electrophoretic display panel; one or more light sensors optically coupled to the light guide panel such that at least a portion of ambient light incident upon the light guide panel is directed to the one or more light sensors; an ambient light module configured to:
receive, from at least one of the one or more light sensors, one or more signals indicative of an ambient light level, anddetermine an ambient light level based at least in part on the one or more signals; and an illumination control module coupled to the one or more illuminators and the one or more light sensors and configured to vary a level of illumination provided by the one or more illuminators based at least in part on the determined ambient light level.