The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 16, 2025
Filed:
Jun. 28, 2024
Amazon Technologies, Inc., Seattle, WA (US);
Miguel Virgen, San Jose, CA (US);
Thomas R. Hoffend, San Ramon, CA (US);
Xiaolong Zheng, Newark, CA (US);
Ahmed Hassan, San Jose, CA (US);
Nageswara Rao Tadepalli, San Jose, CA (US);
Bin Hou, San Jose, CA (US);
Juho Ilkka Jalava, Santa Clara, CA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
Devices, systems, and methods are provided for a front light for use with reflective displays. A display device (such as an e-reader, for example) may include a light source and a light guide able to receive first light from the light source. The light guide includes a plurality of extraction features that control optimal movement of light emitted by the light source through a display stack of the display device. The extraction feature is provided in a wedge shape at an angle such that when light refracts from the extraction feature, it is directed towards the reflective LCD display at an incidence angle close to the display normal for the reflected light to exhibit similar properties as the reflected light from the EPD panel.