公开(公告)号：US10186209B1

公开(公告)日：2019-01-22

申请号：US14955926

申请日：2015-12-01

Applicant: Amazon Technologies, Inc.

Inventor： Suchit Shreyas Shah ,  Joseph Patrick Jones ,  Timothy Daniel Leehane ,  Martin Steven Rauchwerk

IPC: G06F3/00 ,  G09G3/34 ,  G02F1/1335 ,  G02F1/133 ,  G09G3/20 ,  G09G3/36 ,  G06T11/60

Abstract: A computing device executes a “night mode” for optimizing the device display's light emission for night-time use. The device stores a dimming filter and/or a color filter to achieve a desired brightness and color temperature of the display. The dimming filter is used to set a display backlight level and to “dim” the display data itself via alpha blending of the screen image with a grey mask. The computing device can blend the image with the grey mask in order to dim the display below system minimums. The color filter is alpha blended with each pixel in the image to reduce the luminance of blue light until the luminance is lower than that of another color of the emitted light. The proper dimming and color filters may be selected according to a desired screen brightness obtained from user input and/or from ambient light sensor data.