Technologies for low-power standby display refresh

US9620088B2 · kind B2 · utility

Assignee

• Intel Corporation · US

Inventors

• Vasudev Bibikar · Austin, US
• Rajesh Poornachandran · Portland, US
• Ajaya V. Durg · Austin, US
• Arpit Shah · Austin, US
• Anil K. Sabbavarapu · Austin, US
• Nabil F. Kerkiz · Austin, US
• Quang T. Le · Austin, US
• Ryan R. Pinto · Austin, US
• Moorthy Rajesh · Folsom, US
• James A. Bish · Antelope, US
• Ranjani Sridharan · Sunnyvale, US

Key dates

• Filing date: Mar 11, 2015
• Grant date: Apr 11, 2017
• Expiry date: Jun 2, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02D30/50
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

Technologies for low-power display refresh standby include a computing device with a display such as an LCD panel. The computing device may include a system-on-a-chip (SoC) with a processor, I/O subsystem, display controller, and memory. When the computing device determines that a display image is static, the computing device enters a low-power display refresh standby mode, powering down unneeded components of the SoC such as processor cores, peripheral devices, and memory other than a dedicated display buffer. The display controller may access the dedicated display buffer via the I/O subsystem and output the image to the display. The computing device may power down the I/O subsystem and the dedicated display buffer when a display controller FIFO is full of image data, and periodically power on the I/O subsystem and display buffer to fill the display controller FIFO. Other embodiments are described and claimed.