Patent number: 9835887
Abstract: A device (100) includes a display (102, 800) that is suitable for use under widely ranging lighting conditions. The display includes separately operable transmissive light modulator subpixels (402, 404, 406, 502, 504, 506, 602, 604, 606, 702, 704, 706, 808, 810, 812, 1036, 1136, 1204, 1304, 1404, 1504, 1716, 1916) that can be provided in at least three colors to provide a full color display but also includes separately operable reflective light modulator subpixels (408, 508, 608, 708, 814, 1038, 1138, 1202, 1302, 1402, 1502, 1714, 1914) that provide basic readability when light levels are so high (e.g., bright summer day) that the image presented by the transmissive light modulators would be difficult to discern. The reflective light modulators may be provided with in-pixel memory (526) so as to reduce the energy cost of providing always-on functioning for displaying certain time sensitive information.
Type:
Grant
Filed:
February 21, 2014
Date of Patent:
December 5, 2017
Assignee:
GOOGLE TECHNOLOGY HOLDINGS LLC
Inventors:
Li Zhuang, Ross W Ripley, Sen Yang