Display Control Device Power Optimization via Frame Integration
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Solution Overview
Problem
Self-light-emitting display devices, such as those using OLEDs, face challenges in reducing power consumption while maintaining image quality, particularly when there are significant differences in image luminance between frames, as existing control methods fail to appropriately adjust luminance, leading to either increased power consumption or degraded image quality.
Innovation Solution
A control device and display device that include a line integrating unit, a frame integrating unit, a power consumption adjustment term determining unit, and an output signal generating unit, which calculate and adjust output signal values for pixels based on pixel signal values and a frame threshold to optimize power consumption without degrading image quality, by integrating signal values across rows and frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the luminance of the current frame is controlled based on the luminance value of the previous frame, then power consumption can be reduced, but when there is a significant difference in image between frames, the luminance cannot be appropriately adjusted and image quality degrades
Solution Approach 1:
The patent segments the frame processing into multiple stages: first calculating a preliminary luminance adjustment based on the previous frame, then performing a second adjustment based on the current frame's actual luminance characteristics. This two-stage segmentation allows the system to benefit from both temporal prediction and current frame accuracy, resolving the contradiction between power consumption reduction and image quality maintenance.
Solution Approach 2:
The patent performs a preliminary luminance adjustment based on the previous frame's luminance value before finalizing the current frame's display. This preliminary action provides a baseline for power consumption reduction while allowing subsequent adjustments to ensure image quality is not compromised when significant differences exist between frames.
2Manufacturing precision
If higher luminance is displayed to maintain image quality, then power consumption increases in self-light-emitting display devices
Solution Approach 1:
The patent implements dynamic luminance adjustment that adapts to the actual content of each frame. By calculating adjustment values based on both previous frame predictions and current frame measurements, the system dynamically optimizes luminance levels to maintain image quality while minimizing power consumption, rather than using fixed or overly conservative luminance settings.
Solution Approach 2:
The patent incorporates feedback mechanisms by comparing the calculated preliminary luminance adjustment with the actual luminance characteristics of the current frame. This feedback loop allows the system to correct deviations and ensure that power consumption is reduced without compromising image quality, even when significant differences exist between consecutive frames.
Data Source
AI summary
A control device calculates output signal values to the respective pixels for each row based on pixel signal values. The control device includes a line integrating unit that calculates a line integrated value by totaling the pixel signal values for the respective pixels within a line pixel group, a frame integrating unit that calculates a frame integrated value by totaling the output signal values for the respective pixels of a former arranged pixel group for which the output signal values have already been calculated in the same display frame, a power consumption adjustment term determining unit that calculates a power consumption adjustment term based on a frame threshold that is a predetermined threshold for power consumption, a line integrated value, and a frame integrated value, and an output signal generating unit that calculates output signal values based on a pixel signal value and the power consumption adjustment term.