Organic Light Emitting Diode Display Having Photodiodes

摘要

Systems, methods, and devices are provided in which photodetectors disposed throughout a display are used to control the display brightness. The photodetectors are to be used for ambient light sensing, proximity sensing, or to compensate for aging OLEDs. In some embodiments, photodiodes are fabricated with OLEDs during the TFT fabrication process. In some embodiments, the photodetectors may be disposed throughout the display in zones containing OLEDs. The photodetectors are used to control the display brightness and color for the OLEDs in areas around each photodetector based on ambient light, aging, and/or nearby objects. A controller makes driving strength adjustments to the OLEDs in each zone independent of other zones. Photodetectors disposed throughout the display may improve proximity sensing and provide additional functionality to the device.

主权项

1. A display, comprising:
an array of pixels including at least a first pixel in a first region of the display and a second pixel in a second region of the display; a plurality of photodetectors that detect ambient light including at least a first photodetector in the first region of the display and a second photodetector in the second region of the display, wherein the first photodetector generates a first ambient light signal in response to ambient light incident on the first region of the display and the second photodetector generates a second ambient light signal in response to ambient light incident on the second region of the display; and a controller that determines control signals for the pixels to compensate for differences in ambient light across the display, wherein the control signals include at least a first control signal that provides a first compensation to the first pixel based on the first ambient light signal and a second control signal that provides a second compensation to the second pixel based on the second ambient light signal, wherein the first compensation is different than the second compensation.