Apple Inc.

Omnivision Technologies, Inc.

Wanqing Xin

Jenny Hu

Yingying Tang

Andrey Pokrovskiy

Yang Xu

Yuhui Li

Chaohao Wang

Jean-Pierre Simon Guillou

Rui Wang

Kingsuk Brahma

Jie Won Ryu

Hiroaki Ebihara

Mahesh B Chappalli

Arthur L Spence

Koorosh Aflatooni

Gokhan Avkarogullari

Mohammad Ali Jangda

Yi Qiao

Liang Zuo

Chendi Zhang

Min Qu

Graeme M Williams

James R Montgomerie

Zhiyong Zhan

Alexander K Kan

Mehmet N Agaoglu

Xuelian Liu

Alexey Kornienko

Zuo Xia

Mario Miscuglio

Giovanni Corradini

Ming Xu

Snehal T Jariwala

Asha G Karvaje

Aishwarya Prem Renu

Martin Kocicka

Andrew D Pangborn

Xin Zheng

Systems and methods described herein may utilize a non-linear scaling relationship to scale brightness of selective portions of the display in a manner that reduces or eliminates perceivable banding effects. By non-linearly controlling changes in brightness of the display, a viewer may perceive a more uniform, linear dimming towards the relatively dimmer region without perceiving banding, leading to improved user experience when viewing the electronic display.

Display panel brightness control based on gaussian edges

Systems and methods are described herein to control brightness based on image content or other inputs to a display system. A dual-control system may integrate both slow control operations and fast control operations into a cohesive brightness management system. By using both shorter-term (e.g., fast control) and longer-term (e.g., slow control) brightness adjustment operations, the electronic device may quickly respond to high luminance and high brightness situations that may cause burn-in into the display, image artifacts, or other damage. Responding quickly to these high consumption situations may prevent damage or perceivable upset to an ongoing process, among other benefits.

Content dependent brightness management system

An electronic device may include a display. Control circuitry may operate the display at different frame rates such as 60 Hz, 80 Hz, and 120 Hz. The control circuitry may determine which frame rate to use based on a speed of animation on the display and based on a type of animation on the display. To mitigate the appearance of judder as the display frame rate changes, the control circuitry may implement techniques such as hysteresis (e.g., windows of tolerance around speed thresholds to ensure that the display frame rate does not change too frequently as a result of noise), speed thresholds that are based on a user perception study, consistent latency between touch input detection and corresponding display output across different frame rates (e.g., using a fixed touch scan rate that is independent of frame duration), and animation-specific speed thresholds for triggering frame rate changes.

Displays with variable frame rates

Aspects of the subject technology relate to providing frame rate arbitration for electronic devices. Frame rate arbitration can include determining a global frame rate based on frame rate parameters from one or more animation sources, and providing the global frame rate to the animation sources. The frame rate parameters for various animations sources can have differing preferred, minimum, and/or maximum frame rates, and the global frame rate may be determined for concurrent display of multiple animations from the multiple animation sources. In one or more implementations, frame rate arbitration can also be performed based on frame rate parameters from an input source.

Rendering for electronic devices

An image sensor includes a pixel array with rows and columns of pixels. Each row of the pixel array has a first end that is opposite a second end of each row of the pixel array. Control circuitry is coupled to the first end of each row of the pixel array to provide control signals to each row of the pixel array from the first end of each row of the pixel array. Far end driver circuitry coupled to the second end of each row of the pixel array to selectively further drive from the second end of each row of the pixel array the control signals provided by the control circuitry from the first end of each row of the pixel array. The control circuitry is further coupled to provide far end control signals to the far end driver circuitry.

Image sensor far end driver circuitry providing fast settling row control signals

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San Jose, CA, United States of America

Wanqing Xin