AMOLED Display Module Light-Emitting Delay Time Adjustment
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Solution Overview
Problem
Active-matrix organic light-emitting diode (AMOLED) display modules in low frequency driving mode experience flicker issues due to sensitivity of human eyes to image flicker, as the reduced refresh frequency leads to noticeable image flicker, especially in static image display.
Innovation Solution
A parameter adjustment method that stepwise adjusts the light-emitting delay time and initialization signals within preset ranges to determine optimal values that minimize flicker values across various gray levels, thereby reducing the perceived flicker and improving image stability in low frequency driving mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display module operates in low frequency driving mode to reduce power consumption, then energy efficiency is improved, but image flicker becomes noticeable and viewing comfort deteriorates
Solution Approach 1:
The patent adjusts the light-emitting delay time parameter within a preset range to find optimal values that minimize flicker. By systematically varying this timing parameter and measuring corresponding flicker values, the method identifies parameter settings that reduce visible flicker while maintaining low frequency operation
Solution Approach 2:
The patent implements a feedback mechanism where flicker values are measured for different light-emitting delay time settings, and this measurement information is used to determine the preferred parameter value. The system uses the measured flicker feedback to select the optimal delay time that minimizes visible flicker
2Object-affected harmful factors
If the light-emitting delay time is adjusted to minimize flicker, then viewing comfort is improved, but the complexity of parameter calibration increases
Solution Approach 1:
The patent focuses calibration efforts on the specific parameter (light-emitting delay time) that has the most significant impact on flicker, rather than optimizing all possible parameters. This partial action approach reduces calibration complexity while achieving effective flicker reduction
Data Source
AI summary
A parameter adjustment method of a display module includes: setting an initial value of a light-emitting delay time and specified gray levels; based on the initial value of the light-emitting delay time, adjusting the light-emitting delay time stepwise until a value of an adjusted light-emitting delay time exceeds a preset range of the light-emitting delay time, so that values of the light-emitting delay time within the preset range of the light-emitting delay time are obtained; obtaining flicker values of the display module at the specified gray levels for each value of the light-emitting delay time; and determining a preferred value of the light-emitting delay time from the values of the light-emitting delay time according to flicker values corresponding to the values of the light-emitting delay time.