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:
Nov. 08, 2022
Filed:
Mar. 16, 2021
Apple Inc., Cupertino, CA (US);
Cheng-Chih Hsieh, Santa Clara, CA (US);
Abbas Jamshidi Roudbari, Saratoga, CA (US);
Shih Chang Chang, Cupertino, CA (US);
Shyuan Yang, Burlingame, CA (US);
Ting-Kuo Chang, San Jose, CA (US);
Tsung-Ting Tsai, San Jose, CA (US);
Warren S. Rieutort-Louis, Cupertino, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
An electronic device may include a display and a sensor under the display. The display may include pixels having emission transistors that are controlled by emission signals. The emission signals are controlled using a pulse width modulation (PWM) scheme to control the brightness of the display. The emission signals may further include a localized sensor blackout pulse configured to generate a localized sensor blackout region that overlaps with the sensor to reduce any undesired back emission of light emitted from the display. The sensor blackout pulse may be automatically generated periodically or generated in an on-demand basis once per frame, multiple times per frame time, or once every multiple frames. Any luminance degradation caused by the sensor blackout pulse may be compensated by boosting the luminance and/or by extending the duration of each emission on pulse.