Segmented Backplane Display for Low-Fill Image Power Saving
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Solution Overview
Problem
Existing image displays consume power inefficiently, particularly when displaying low fill-factor images, leading to reduced battery life and heat generation, especially in devices like augmented reality headsets.
Innovation Solution
Implementing a segmented backplane that dynamically activates only active segments of the display, deactivating inactive segments to conserve power, reduce buffering, and optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the entire backplane is activated to display images, then complete image coverage is achieved, but power consumption increases significantly
Solution Approach 1:
The backplane is divided into multiple independently controllable segments, allowing the system to activate only the segments containing non-zero content while keeping other segments deactivated. This segmentation enables selective power consumption based on actual display needs, resolving the contradiction between complete image coverage and power efficiency.
2Productivity
If all pixel drivers are activated, then full display resolution is maintained, but processing and buffering resources are wasted
Solution Approach 1:
Pixel drivers are organized into segments corresponding to backplane segments. Only pixel drivers associated with active segments (those containing non-zero content) are activated for processing and driving pixels. This selective activation improves processing efficiency while maintaining display resolution for the actual content being displayed.
Solution Approach 2:
Instead of activating all pixel drivers unnecessarily, the system applies partial action by activating only the subset of pixel drivers needed for the current image content. This avoids excessive processing and buffering resources being consumed while maintaining the required display quality for the actual content.
3Loss of time
If the backplane processes all image data, then complete image rendering is achieved, but memory usage and buffering time increase
Solution Approach 1:
The image data processing is segmented according to the backplane segment structure. Only image data corresponding to active segments (containing non-zero content) is processed, buffered, and transferred to pixel drivers. This eliminates unnecessary processing and buffering of empty segment data, reducing both buffering time and memory usage while maintaining complete image rendering for the actual content.
Data Source
AI summary
A display system may include a segment analyzer, a segment buffer, and a set of pixel drivers. The segment analyzer may perform an analysis of image data representing an image to be displayed. The analysis distinguishes a first portion of the image data that corresponds to an active segment of the image containing non-zero content from a second portion of the image data that corresponds to an empty segment of the image without non-zero content. The segment buffer stores the first portion of the image data in accordance with a segment map based on the analysis. The pixel drivers then use the segment map and the image data to cause a set of pixels to display the image by driving a first subset of pixels associated with the active segment without driving a second subset of pixels associated with the empty segment.