Light Modulating Device Staggered Pulse Timing
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Solution Overview
Problem
Liquid crystal display panels experience poor display due to over high duty ratios on pulse waveforms caused by strong light irradiation, leading to shifts in liquid crystal charging voltage and threshold voltage of driver transistors.
Innovation Solution
The display panel is partitioned into multiple light modulating regions, with staggered pulse start times for light modulating signals to prevent excessive duty ratios on gate lines, ensuring uniform image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If PWM modulation is applied to the liquid crystal display panel, then light modulation capability is improved, but duty ratio distortion occurs causing level bar blocks and poor display
Solution Approach 1:
The gate line is divided into multiple gate line segments corresponding to different light modulating regions. Each segment independently controls the PWM modulation timing for its region, preventing the accumulation of duty ratio errors that would otherwise occur along the entire gate line. This segmentation resolves the contradiction by maintaining light modulation capability while eliminating the duty ratio distortion that causes display defects.
2Reliability
If the displaying region is partitioned into multiple light modulating regions, then duty ratio distortion is prevented, but device complexity increases
Solution Approach 1:
The display panel's gate lines are segmented into multiple gate line segments, each corresponding to a light modulating region. This segmentation allows independent PWM timing control for each region, preventing duty ratio distortion without requiring complete redesign of the display architecture. The segmentation approach balances improved duty ratio control with manageable increases in device complexity.
Solution Approach 2:
Different light modulating regions are activated in periodic sequences rather than simultaneously. Each gate line segment receives PWM modulation signals at staggered timings, creating a periodic activation pattern across regions. This periodic action distributes the control complexity over time, reducing the instantaneous burden on control circuits while maintaining accurate duty ratio control.
3Reliability
If pulse start times are staggered across regions, then level bar blocks are eliminated, but manufacturing complexity increases
Solution Approach 1:
The staggered pulse start times across different light modulating regions follow a periodic pattern determined by the sequential activation of gate line segments. This periodic timing scheme simplifies manufacturing compared to arbitrary staggered timings, as it requires only systematic delay circuitry rather than complex individual timing control for each region. The periodic action eliminates level bar blocks while maintaining reasonable manufacturing simplicity.
Data Source
AI summary
The present invention provides a light modulating method, a light modulating device and a storage medium. The method is applied to a display device and includes: acquiring a light modulating instruction; according to the light modulating instruction, partitioning a displaying region of the display device to form a plurality of light modulating regions; and disposing a light modulating signal in each of the light modulating regions; wherein first electrical level duty ratios of the light modulating signals disposed in the light modulating regions are staggered.