Adaptive Blank Frame Insertion for Display Luminance Control
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Solution Overview
Problem
High-resolution hand-portable electronic device displays often appear blurred when showing moving images due to insufficient adaptation to changing contexts, such as luminance conditions, leading to suboptimal image quality and excessive power consumption.
Innovation Solution
An apparatus comprising a controller, a display, and a frame memory that inserts blank fields into frames of data based on detected context, such as ambient light conditions, to adjust luminance and improve image clarity and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display shows high luminance for outside use in bright conditions, then the display is visible in bright conditions, but the display is too bright for shady conditions and consumes excessive power
Solution Approach 1:
The display system dynamically adjusts its luminance by inserting blank fields between video frames based on detected ambient light conditions. The controller monitors context (such as ambient light levels) and adaptively modifies the display output by inserting varying numbers of blank fields, transitioning from high luminance in bright conditions to reduced luminance in shady conditions, thereby optimizing power consumption across different environments.
Solution Approach 2:
The system changes the display parameter (luminance) by controlling the insertion of blank fields. By varying the number and duration of blank fields inserted between video frames, the effective luminance displayed to the user is adjusted without changing the underlying video content, allowing the display to adapt to different ambient light conditions and reduce power consumption in lower light environments.
2Reliability
If the display shows moving images without blank fields, then the image quality appears smooth, but the images appear blurred when moving
Solution Approach 1:
The system applies periodic blank fields between video frames to reduce motion blur. By inserting blank fields at regular intervals during the display of moving images, the effective display time of each frame is reduced, which decreases the persistence of vision effect that causes motion blur. This periodic insertion maintains image quality while mitigating the blurring effect during motion.
3Use of energy by moving object
If blank fields are inserted to reduce power consumption, then power efficiency improves, but the display time for actual content decreases
Solution Approach 1:
The system applies partial action by inserting blank fields only when necessary based on detected context. Rather than continuously inserting blank fields, the controller monitors ambient light conditions and video content characteristics, inserting blank fields selectively to achieve power savings while minimizing the impact on content display time. The number and duration of blank fields are adjusted to provide just enough power reduction without excessively compromising content visibility.
Data Source
AI summary
An apparatus including a controller; a display; a frame memory configured to load a frame of data to the display and configured to be filled by a frame of data from the controller, wherein the controller is configured to control the insertion of blank fields between frames of data displayed on the display in dependence upon a detected context.