DDIC Frequency Conversion via TE Signal Segmentation
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Solution Overview
Problem
Existing display technologies face challenges in efficiently reducing the base frame rate of display screens without increasing the complexity of the frequency conversion process or causing image flicker, which can lead to high power consumption and compromised image quality.
Innovation Solution
The proposed solution involves a display screen frequency conversion method where the Display Driver Integrated Circuit (DDIC) chip outputs a Tearing Effect (TE) signal at a reduced base frame rate in response to a frequency reducing instruction from the Application Processor (AP), while maintaining the original image scanning and frame compensating frequencies, thus avoiding adjustments to the DDIC timing and display screen parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the base frame rate of the display screen is reduced to lower power consumption, then power consumption is reduced, but image flicker may occur and image quality may be compromised
Solution Approach 1:
The patent segments the frame rate adjustment into two independent parts: the TE signal output frequency is reduced to lower power consumption, while the image scanning frequency is maintained at its original value to ensure image quality. This segmentation allows independent optimization of power consumption and image quality parameters without mutual interference.
Solution Approach 2:
The patent applies different quality requirements to different parts of the system: the TE signal (used for synchronization) is reduced in frequency to save power, while the image scanning process maintains its original high frequency to preserve image quality. This local differentiation resolves the contradiction between power saving and image quality.
2Use of energy by moving object
If the base frame rate is reduced through traditional frequency conversion methods, then power consumption is reduced, but the complexity of the frequency conversion process increases
Solution Approach 1:
The patent extracts the frequency conversion requirement from the image scanning process and applies it only to the TE signal output. By taking out the frequency conversion need from the critical image path, the system achieves power savings without complicating the image processing pipeline.
Solution Approach 2:
Instead of converting the image scanning frequency (which would complicate the system), the patent inverts the approach by converting the TE signal frequency while keeping the image scanning frequency unchanged. This reverse approach simplifies the overall system while achieving the same power savings.
3Use of energy by moving object
If the base frame rate is reduced to save power, then power consumption is reduced, but the fluency of images may be affected
Solution Approach 1:
The patent segments the display system into two independent frequency domains: the TE signal operates at a reduced frequency for power savings, while the image scanning operates at the original high frequency to maintain fluency. This segmentation ensures that power reduction in one domain does not adversely affect performance in another domain.
Data Source
AI summary
A display screen frequency conversion method, a DDIC chip, and a terminal are provided. The method includes: outputting a Tearing Effect (TE) signal to an Application Processor (AP) at a first base frame rate, and performing an image scanning and a frame compensating at the first base frame rate; receiving a frequency reducing instruction issued by the AP, wherein the frequency reducing instruction is configured to instruct to reduce a base frame rate of the display screen; and outputting the TE signal to the AP at a second base frame rate based on the frequency reducing instruction and continually performing the image scanning and the frame compensating at the first base frame rate, wherein the second base frame rate is less than the first base frame rate.