DDIC Frame Compensation Control for Refresh-Rate Conversion
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Solution Overview
Problem
Existing high-refresh-rate display technologies face challenges in balancing picture flickering and display delay during large-range frequency conversion, with low-precision ADFR preventing flickering but causing delays, and high-precision ADFR reducing delays but leading to flickering.
Innovation Solution
The AP issues a compensation-stopping instruction to the DDIC chip to pause frame compensation when preparing new image data, allowing the DDIC chip to resume compensation after receiving the data, thereby enabling compatibility between low-precision and high-precision ADFR modes to reduce delays and flickering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If low-precision ADFR is used to prevent picture flickering during frequency conversion, then picture stability is improved, but display delay increases
Solution Approach 1:
The patent implements dynamic switching between low-precision and high-precision ADFR modes based on operational context. The DDIC chip transitions to high-precision mode during normal operation to minimize display delay, and switches to low-precision mode specifically during frequency conversion operations to prevent picture flickering. This dynamic adaptation resolves the contradiction by applying the appropriate precision level at the right time rather than using a fixed precision mode.
Solution Approach 2:
The patent changes the precision parameter of ADFR dynamically based on the operational state. By adjusting the precision level of adaptive dynamic frame rate conversion according to whether the system is in frequency conversion mode or normal display mode, the patent optimizes both picture stability and display delay performance across different operating conditions.
2Loss of time
If high-precision ADFR is used to reduce display delay, then display responsiveness is improved, but picture flickering occurs during frequency conversion
Solution Approach 1:
The system dynamically adjusts ADFR precision based on real-time operational context. During frequency conversion operations, the system switches to low-precision mode to maintain picture stability, while during normal high-refresh-rate operation, it uses high-precision mode to minimize display delay. This dynamic behavior allows the system to achieve both low latency and flicker-free operation at different times.
Solution Approach 2:
The precision parameter of ADFR is changed according to the operational state. The patent implements parameter switching that adapts the ADFR precision level based on whether the display is undergoing frequency conversion or maintaining a stable refresh rate, thereby optimizing both responsiveness and visual stability across different operating modes.
3Stability of the object's composition
If frame compensation is continuously performed to maintain picture brightness stability, then picture quality is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic frame compensation rather than continuous compensation. By performing frame compensation only at specific intervals or under specific conditions (such as during frequency conversion or when brightness drift is detected), the system maintains picture brightness stability while reducing the overall power consumption compared to continuous compensation operations.
Solution Approach 2:
The DDIC chip autonomously determines when frame compensation is necessary based on operational conditions and brightness stability requirements. The system self-regulates the compensation process, activating it only when needed to maintain picture quality, thereby avoiding unnecessary power consumption from continuous compensation operations.
Data Source
AI summary
Provided are an image display method, a display driver integrated circuit (DDIC) chip, an application processor (AP), a display screen module, and a terminal. The method is applied in the DDIC chip. The method includes: performing image scanning based on first image frame data issued by an AP, and performing frame compensation; stopping, in response to a compensation-stopping instruction issued by the AP, the frame compensation and waiting for the AP to issue image frame data, the compensation-stopping instruction being used to instruct the AP to prepare to issue new image frame data; and performing, in response to receiving second image frame data issued by the AP, image scanning based on the second image frame data and resuming the frame compensation.