Backlight Module Driving Circuit Reduces LCD Flicker
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Solution Overview
Problem
Current liquid crystal display devices experience screen flickering due to the alternating polarity reversal of liquid crystal molecules between odd and even frames, which leads to damage and reduced display effectiveness.
Innovation Solution
A backlight module with a driving circuit that alternates between two different brightness signals for odd and even sequence frames, adjusting the light-emitting brightness to reduce flickering by controlling the liquid crystal molecule deflection and overall display brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the liquid crystal molecules are reversed by alternating odd and even frames to avoid damage, then the liquid crystal molecules are protected from damage, but the screen will flicker and the display effect deteriorates
Solution Approach 1:
The patent applies periodic action by using different polarity sequences for odd and even frames in a periodic manner. The first polarity sequence is applied during odd frames and the second polarity sequence is applied during even frames, creating a periodic pattern that prevents liquid crystal damage while maintaining stable display by avoiding continuous same-polarity stress
Solution Approach 2:
The patent implements dynamics by making the polarity sequence flexible and adaptive rather than fixed. The display device dynamically switches between different polarity sequences based on the frame number (odd or even), allowing the system to adapt its behavior to prevent both damage and flicker through dynamic control of the liquid crystal polarity pattern
Data Source
AI summary
A backlight module and a driving method therefor, and a display panel and a display apparatus. The backlight module includes: a backlight panel; and a backlight driving circuit, which is used for responding to a first timing signal, so as to output a first brightness signal to drive the backlight panel to emit light, and is used for responding to a second timing signal to output a second brightness signal to drive the backlight panel to emit light. For a frame picture of a first sequence frame, a first brightness signal is output to drive a backlight panel to emit light, and for a frame picture of a second sequence frame, a second brightness signal is output to drive the backlight panel to emit light.