Ambient light adaptive displays with paper-like appearance

摘要

Abstract of the Disclosure An electronic device may include a display having an array of display pixels and having display control circuitry that controls the operation of the display. The display control circuitry may operate the display in 5 different modes. In a paper mode, display control circuitry may use stored spectral reflectance data to adjust display colors such that the colors appear as they would on a printed sheet of paper. In a low light mode when the ambient light level is below a threshold, the light emitted 10 from the display may be adjusted to mimic the appearance of an incandescent light source. In a bright light mode when the ambient light level exceeds a threshold, the light emitted from the display may be adjusted to maximize readability in bright light. The target white point of the 15 display may be adjusted based on which mode the display is operating in. RECEIVE INCOMING PIXEL DATA INDICATING DISPLAY COLORS TO BE DISPLAYED 300 MEASURE BRIGHTNESS AND COLOR OF AMBIENT LIGHT USING COLOR-SENSITIVE 302 AMBIENT LIGHT SENSOR DETERMINE DISPLAY MODE BASED ON BRIGHTNESS OF AMBIENT LIGHT 304 LOW LIGHT PAPER BRIGHT MODE MODE LIGHT ADJUST DISPLAY ADJUST DISPLAY ADJUST DISPLAY COLORS TO MIMIC COLORS BASED COLORS TO INDOOR LIGHT ON COLOR AND MAXIMIZE SOURCE (E.G., BRIGHTNESS OF READABILITY AND SET DISPLAY AMBIENT LIGHT LUMINANCE WHITE POINT TO (E.G., ADJUST DISPLAY MIMIC INCANDESCENT COLORS TO MIMIC LIGHT SOURCE) PAPER) 310