POWER MANAGEMENT FOR ORGANIC LIGHT-EMITTING DIODE (OLED) DISPLAYS
First Claim
1. A method implemented by a computing device, the method comprising:
- detecting initiation of power management for a display screen of the computing device;
obtaining an input image for processing responsive to the detecting; and
applying a power management algorithm to the input image pixel by pixel to generate a power-managed image for presentation on the display screen, the power-managed image consuming less power to display than the input image and displayed to maintain perceived contrast of the input image.
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Accused Products
Abstract
Embodiments of power management for OLED displays are described. In various embodiments, power consumption for an OLED display can be managed by adjusting brightness of individual pixels. An input image can be obtained and processed using an algorithm that reduces brightness and maintains perceived contrast. This can involve computing a difference value associated with individual pixels of the image to account for perceived contrast and computing a reduced brightness value for the pixel using the difference value. An ultra-low power mode in which power consumption of the OLED display is adjusted semantically can be employed for a low brightness range. The algorithm and the ultra-low power mode can be combined to provide a continuous range of adjustment for the OLED display.
219 Citations
20 Claims
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1. A method implemented by a computing device, the method comprising:
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detecting initiation of power management for a display screen of the computing device; obtaining an input image for processing responsive to the detecting; and applying a power management algorithm to the input image pixel by pixel to generate a power-managed image for presentation on the display screen, the power-managed image consuming less power to display than the input image and displayed to maintain perceived contrast of the input image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A portable computing device, comprising:
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an organic light-emitting diode (OLED) display; one or more processors coupled to memory; and a power manager stored in the memory and executable via the one or more processors to cause the portable computing device to perform power management for the OLED display by at least; detecting initiation of power management for the OLED display; responsive to the detecting, selecting between a pixel by pixel processing mode and an ultra-low power mode to generate a power-managed image from an input image for presentation on the OLED display; and causing display of the power-managed image on the OLED display. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. Computer-readable media having stored thereon computer-executable instructions that, if executed by a computing device, initiate the computing device to implement a power management scheme to manage power consumption of an image for presentation on an organic light emitting diode (OLED) display by selectively switching between power management modes including:
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a pixel by pixel processing mode configured to generate a power-managed image for presentation on the OLED display from the image by; determining a power reduction value and for each pixel of the image; calculating a brightness reduction factor to achieve the power reduction value; calculating a contrast preservation factor to account for perceived contrast of the input images; and summing the brightness reduction factor and the contrast preservation factor to obtain an output brightness value of the pixel for the power-managed image; and generating the power-managed image using the output brightness values obtained for each pixel; and an ultra-low power mode configured to generate the power-managed image for presentation on the OLED display from the image by; identifying elements of the image using a semantic-level mapping that defines attributes of the elements and designates different modifications for different element types; and modifying the identified elements in accordance with the modifications designated by the semantic-level mapping to produce the power-managed image. - View Dependent Claims (20)
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Specification