Patent ID: 9183779
Filing Date: 2015-11-10
Classification: G06F,G06K,G09G,H05B,Y02B

Abstract:
1. A dual-function organic light emitting diode (OLED) display, comprising: a column of pixels each comprising an OLED coupled in series with a channel of a drive transistor, wherein the series coupled OLED and drive transistor of each pixel in the column of pixels are coupled together in a parallel combination; a current sensor configured to convert a current flowing through the parallel combination into an output voltage; a switch configured to decouple the parallel combination from the current sensor in a first switching state and to couple the parallel combination to the current sensor in a second switching state; and a controller configured to control the switch to be in the first switching state and the drive transistor of each pixel in the column of pixels to be in a saturation region of operation if the column of pixels is to function in a display mode, and to control the switch to be in the second switching state and the drive transistor of each pixel in the column of pixels to be in a linear region of operation if the column of pixels is to function in a sense mode, wherein the controller is further configured to determine an ambient light level in an environment of the dual-function OLED display based on samples of the output voltage.