AMOLED Display Control Pulse Synchronization for Jitter Reduction
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Solution Overview
Problem
AMOLED displays experience display jitter due to changes in brightness caused by delays in processing image frames, leading to a stuttering effect and poor user experience.
Innovation Solution
A display control method and apparatus that adjusts the duty cycles of control pulses to maintain consistent brightness by determining additional control pulses based on delay durations, ensuring identical duty cycles and synchronizing pulse generation with a synchronization signal to match refresh periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the processor takes time to process image frames, then processing completeness is improved, but display timing synchronization deteriorates causing jitter
Solution Approach 1:
The patent applies preliminary action by pre-calculating the number of control pulses needed based on the delay duration before actual display. The processor determines how many control pulses should be generated in advance to compensate for processing delays, ensuring that the display timing remains synchronized even when image frame processing takes varying amounts of time.
2Duration of action of moving object
If the number of control pulses is increased to cover delay duration, then display coverage is improved, but brightness consistency deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the duty cycle parameter of control pulses based on the delay duration. When delay occurs, the system calculates the appropriate duty cycle value to maintain consistent perceived brightness across varying numbers of control pulses. This allows the display to cover the entire delay period while preserving brightness consistency through parameter optimization.
3Illumination intensity
If duty cycles are adjusted to maintain brightness, then brightness consistency is improved, but control complexity increases
Solution Approach 1:
The patent applies self-service by implementing an automatic duty cycle calculation mechanism within the driving module. When a delay instruction is received, the system automatically calculates the appropriate duty cycle based on the delay duration and generates the corresponding control pulses without requiring manual intervention or complex external control logic. This self-adjusting mechanism maintains brightness consistency while minimizing control complexity.
Data Source
AI summary
A display control method includes: obtaining a delay instruction from a processor, in which the delay instruction includes a delay duration required to display a current image frame; determining a plurality of control pulses required to display the current image frame according to the delay duration, in which duty cycles of the plurality of the control pulses are identical; and when a synchronization signal is received, generating each of the plurality of the control pulses sequentially, in which the control pulse is configured to control an active-matrix organic light-emitting diode (AMOLED) display for dimming and displaying.