Image Processor Adaptive Frequency Control for Frame Rate Stability
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Solution Overview
Problem
Display systems face frame drops and decreased frequency due to inadequate dynamic voltage and frequency scaling, leading to a low frame rate, which can result in the operating part becoming idle and further decreasing frequency.
Innovation Solution
An image processor with a frame buffer and display controller that sets a lower frequency limit based on a frame per second signal, ensuring the number of frames per second remains above a predetermined value by adjusting frequencies dynamically using a frequency controller, central processing unit, and graphic processing unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If dynamic voltage and frequency scaling is applied to reduce power consumption, then energy efficiency is improved, but frame rate decreases causing frame drops
Solution Approach 1:
The patent implements dynamic frequency adjustment where the operating part's frequency is continuously adapted based on real-time frame delivery status. When frame delivery succeeds, frequency is reduced to save power; when frame drops occur, frequency is increased to ensure frame rate requirements are met, creating a dynamic balance between power consumption and frame rate
Solution Approach 2:
The patent establishes a feedback mechanism where the frame buffer's operational status (frame delivery success/failure) is monitored and fed back to the frequency control logic. This feedback loop enables the system to adjust frequency based on actual performance, preventing both excessive power consumption and frame drops by continuously optimizing the operating frequency
2Use of energy by moving object
If frequency is decreased to save power, then energy efficiency is improved, but the operating part becomes idle causing further frequency reduction
Solution Approach 1:
The patent applies preliminary anti-action by setting a minimum frequency threshold that prevents the operating part from entering idle state. The frequency control logic proactively maintains frequency above this threshold when frame delivery is at risk, counteracting the tendency toward idle states before they occur and ensuring continuous frame delivery
Solution Approach 2:
The patent implements beforehand cushioning by maintaining a buffer of operational capacity through minimum frequency enforcement. This cushion prevents the system from collapsing into idle states by ensuring the operating part always retains sufficient processing capability to handle frame delivery requirements, even under low workload conditions
Data Source
AI summary
An image processor includes a frame buffer configured to collect an image data of pixels and configured to generate frame data, a display controller configured to generate the frame update command based on a vertical synchronizing signal and a frame per second signal representing a number of activating of the frame update signal in a second and an operating part configured to generate the vertical synchronizing signal and the image data. When the frame data is generated, the frame buffer activates a frame update signal in response to a frame update command and outputs the frame data. When the frame per second signal is less than a predetermined threshold voltage, the operating part sets a lower limit of a range of a frequency to a predetermined minimum frequency.