Source Driver Chips Time-Divisional Current Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-resolution and high-refresh-rate display devices face electromagnetic interference due to the superposition of electron current peaks from source driver chips, affecting product reliability.
Innovation Solution
The display panel incorporates source driver chips with cascaded shift registers and level shift circuits that time-divisionally output pulse signals, preventing simultaneous electron current peaks and reducing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If point-to-point transmission protocol mode is used to achieve high-rate transmission of signals, then transmission rate is improved, but electromagnetic interference occurs due to superposition of electron current peaks
Solution Approach 1:
The patent implements time-divisional conduction of level shift circuits through periodic pulse signals generated by cascaded shift registers. Each level shift circuit is activated in sequence at different time periods rather than simultaneously, converting the continuous high-rate transmission into periodic, time-separated operations that avoid current peak superposition while maintaining overall transmission efficiency
2Productivity
If level shift circuits in multiple source driver chips operate simultaneously, then signal transmission efficiency is improved, but current peaks superpose causing electromagnetic interference
Solution Approach 1:
The patent segments the simultaneous operation of level shift circuits into time-divided operations. Each level shift circuit is assigned a specific time slot through cascaded shift register control, dividing the unified transmission process into separate, non-overlapping segments that eliminate current peak superposition while collectively maintaining transmission efficiency
Solution Approach 2:
The patent uses periodic pulse signals from cascaded shift registers to activate level shift circuits in a time-divisional manner. This periodic activation ensures that circuits operate in sequence rather than simultaneously, preventing current peak superposition while maintaining overall system productivity through structured time-multiplexed operation
Data Source
AI summary
The present disclosure provides a display panel and a display device. The display panel includes source driver chips. The source driver chips include charging compensation modules, and each of the charging compensation modules includes: a plurality of shift registers cascadely connected and configured to time-divisionally output a plurality of pulse signals, and a plurality of level shift circuits time-divisionally conducted in response to the plurality of the pulse signals to prevent the plurality of the level shift circuits in the source driver chips from outputting and generating a plurality electron currents at a same time, which would result in a superposition of current peaks and cause electromagnetic interference problems.