公开(公告)号：US10295721B1

公开(公告)日：2019-05-21

申请号：US15058548

申请日：2016-03-02

Applicant: Amazon Technologies, Inc.

Inventor： Eric Gifford Marason ,  Miguel Virgen ,  Christopher Dwight Barnes

IPC: G02B26/00 ,  F21V8/00 ,  G02F1/167 ,  G02F1/13357 ,  F21W131/30 ,  G02F1/1335

Abstract: Various approaches discussed herein enable techniques for adjusting color temperature value of illumination, for example with regard to electrophoretic ink display screens. A plurality of one type of LEDs are positioned along an injection line of a light guide panel, and are interleaved with a plurality of another type of LED positioned along the injection line. By controlling the current supplied to each group of LEDs, a color temperature value of light directed onto a display screen from the light guide panel may be adjusted to remove or reduce blue aspects.

公开(公告)号：US09965999B1

公开(公告)日：2018-05-08

申请号：US14316660

申请日：2014-06-26

Applicant: Amazon Technologies, Inc.

Inventor： Christopher Dwight Barnes

IPC: G09G3/32 ,  G09G3/34 ,  G09G3/20

CPC classification number: G09G3/32 ,  G09G3/2003 ,  G09G3/3413 ,  G09G3/344 ,  G09G2320/0666 ,  G09G2360/144

Abstract: An electronic device may include a display and a light that may illuminate the display. Based at least partly on preferences of a user that is using the electronic device, a brightness of the display, and/or a brightness of the ambient environment surrounding the electronic device, the color that is being rendered by the display or that is being illuminated on the display may be determined and/or adjusted to a different color. The color may be presented or adjusted by setting or adjusting the power or current being supplied to one or more light-emitting diodes (LEDs) included within the light.

公开(公告)号：US09837852B1

公开(公告)日：2017-12-05

申请号：US14577160

申请日：2014-12-19

Applicant: Amazon Technologies, Inc.

Inventor： Christopher Dwight Barnes ,  Mohammed Aftab Alam

IPC: H02J7/35 ,  F21V8/00 ,  F21V7/22 ,  H02S40/22

CPC classification number: H02S40/22 ,  G02B6/0043 ,  G02B6/0073 ,  H02J7/355

Abstract: An electronic device with a e-paper display that internally integrates photovoltaic cells and are not apparent from the exterior of the device. A light source of the device injects light into a light guide to front-light the e-paper. Light that leaks from edges of the light guide is captured by the photovoltaic cells. The plastic light guide is also impregnated with a photoluminescent material that absorbs near infrared energy that is incident on a face of the display and re-emits it isotropically to be guided by the light guide to the photovoltaic cells. By combining multiple techniques to illuminate hidden photovoltaic cells, the utility of the hidden cells is maximized.