Display Driver Interpolation for Foveated Rendering Power Control
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Solution Overview
Problem
Existing display devices consume excessive power due to source amplifiers remaining active for both high-quality and low-quality areas in foveated rendering, and low-quality areas suffer from reduced image quality.
Innovation Solution
A display device with a gate driver, source driver, and interpolation circuit that selectively activates source amplifiers and interpolates data signals for high-quality and low-quality areas, using an interpolation circuit to provide second data signals to source lines between first and third source lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If source amplifiers remain active for both high-quality and low-quality areas in foveated rendering, then data signals can be provided to all pixels, but power consumption increases excessively
Solution Approach 1:
The patent applies local quality by differentiating the treatment of source amplifiers based on their associated display areas. Source amplifiers corresponding to low-quality areas (peripheral regions) are turned off, while those for high-quality areas (foveal region) remain active. This selective operation optimizes power consumption by matching amplifier activity to the actual quality requirements of different display regions, implementing the principle that different parts of the system should have different functional characteristics based on local needs.
2Use of energy by moving object
If source amplifiers are turned off for low-quality areas, then power consumption is reduced, but image quality in those areas deteriorates
Solution Approach 1:
The patent introduces an interpolation circuit as an intermediary component that generates data signals for source lines corresponding to low-quality areas. This circuit interpolates data signals from adjacent active source lines to create appropriate data signals for regions where source amplifiers are turned off. The interpolation circuit acts as a mediator that maintains acceptable image quality in low-quality areas without requiring full amplifier operation, thus resolving the contradiction between power savings and image quality preservation.
3Manufacturing precision
If all source amplifiers are activated, then high image quality can be maintained across the entire display, but power consumption increases
Solution Approach 1:
The patent implements parameter changes by dynamically adjusting the operational state of source amplifiers based on the quality requirements of different display regions. The system changes the activation parameter (on/off state) of source amplifiers according to whether they serve high-quality or low-quality areas. Additionally, the interpolation circuit modifies the data signal parameters for low-quality regions, generating appropriate signals through interpolation rather than direct amplifier output, thereby reducing power consumption while maintaining adequate image quality.
Data Source
AI summary
A display device may include: a gate driver configured to apply a plurality of gate signals to each of a plurality of gate lines; a source driver configured to generate a plurality of first data signals corresponding to each of a plurality of source lines; and an interpolation circuit configured to: receive the plurality of first data signals from the source driver; and provide a second data signal, obtained by interpolating a first data signal corresponding to a first source line among the plurality of source lines and a first data signal corresponding to a third source line among the plurality of source lines, to a second source line between the first source line and the third source line.