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. 01, 2022
Filed:
Apr. 15, 2020
Apple Inc., Cupertino, CA (US);
Injae Hwang, Cupertino, CA (US);
Jesun Kim, Cupertino, CA (US);
Hyunwoo Nho, Palo Alto, CA (US);
Jie Won Ryu, Santa Clara, CA (US);
Hyunsoo Kim, Mountain View, CA (US);
Junhua Tan, Saratoga, CA (US);
Myungjoon Choi, Sunnyvale, CA (US);
Rebecca Park, Stanford, CA (US);
Shiping Shen, Cupertino, CA (US);
Sun-Il Chang, San Jose, CA (US);
Shengkui Gao, San Jose, CA (US);
Kingsuk Brahma, Mountain View, CA (US);
Jesse Aaron Richmond, San Francisco, CA (US);
Changki Min, San Jose, CA (US);
Yifan Zhang, San Carlos, CA (US);
Jiye Lee, Mountain View, CA (US);
Chaohao Wang, Sunnyvale, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A current-voltage (IV) relationship of a pixel having a diode is initially determined. A first voltage is determined that does not cause the diode to emit light, and a first current across the diode is sensed by applying the first voltage. A predetermined current is determined based on the first voltage and the IV relationship. A ratio is determined based on the first current, a target current, and the predetermined current. A ratio voltage is determined by applying the ratio to a predetermined target voltage. If the first current is less than the predetermined current, then the ratio voltage is applied to supply a target current to the diode. If the first current is greater than the predetermined current, then a second voltage is determined by averaging the first test voltage and the ratio voltage, and the second voltage is applied to supply the target current to the diode.