Display Frame Rate Switching With Synchronized TE and MIPI Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display technologies experience display anomalies such as screen flickering and frame loss during frame rate switching due to asynchronous adjustments in TE frequency and MIPI signal periodicity, particularly in LTPS and LTPO screens.
Innovation Solution
A frame rate control method that buffers the frame rate switching instruction and adjusts TE signal frequency and MIPI signal periodicity synchronously after a predetermined number of image frames are received, ensuring consistent screen refresh periodicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If frame rate switching instruction is executed immediately, then responsiveness is improved, but display anomalies occur due to asynchronous TE frequency and MIPI signal adjustments
Solution Approach 1:
The system buffers the frame rate switching instruction and performs preliminary adjustments to the TE signal frequency before adjusting the MIPI signal periodicity. This preliminary action ensures that the TE frequency is ready in advance, and when the MIPI adjustment occurs, both signals are synchronized, preventing display anomalies while maintaining responsive frame rate switching.
2Speed
If TE frequency is adjusted first, then screen refresh periodicity is optimized, but image data transmission synchronization is lost
Solution Approach 1:
The system uses a feedback mechanism where the display driver circuit monitors the TE signal frequency and provides feedback to the processing unit. Based on this feedback, the processing unit adjusts the MIPI signal periodicity to match the TE frequency, ensuring that image data transmission remains synchronized with screen refresh even after TE frequency adjustment.
3Productivity
If MIPI signal periodicity is adjusted independently, then data transmission rate is optimized, but display anomalies occur due to frequency mismatch
Solution Approach 1:
The system merges the adjustment processes of TE frequency and MIPI signal periodicity into a coordinated operation. The processing unit adjusts both parameters together based on the target frame rate, ensuring that the MIPI signal periodicity always matches the TE frequency. This combined adjustment optimizes data transmission rate while maintaining display consistency.
Data Source
AI summary
This application provides a frame rate control method and a related apparatus. According to the method, when a first application is run on an electronic device, screen display content is refreshed at a first frame rate. When switching from the first application to a second application is performed, frame rate switching is triggered. The frame rate switching is performed in two steps: (1) First, adjust a frequency of a TE signal. (2) Second, adjust a periodicity of a MIPI signal when the counted quantity of image frames received by the HWC reaches the first quantity (where the first quantity may be predetermined and written into storage space of the electronic device) after the frame rate switching instruction is buffered, to cause an adjusted frequency of the TE signal and an adjusted periodicity of the MIPI signal to take effect in a same screen refresh periodicity.