Multiplex Shift Register Unit for Display Panel Power Optimization
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Solution Overview
Problem
The existing multiplex driving technologies face issues with high power consumption and signal amplitude variation due to the characteristics of Thin Film Transistors (TFTs), which lead to increased wiring width and reduced service life, especially when operating for extended periods.
Innovation Solution
A multiplex shift register unit and driving circuit design that alternates power supply signals between high and low levels, using cascaded multiplex shift register units to control the output signals to pixel driving lines, thereby reducing power consumption and preventing signal drift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TFTs operate for a long time continuously, then data multiplexing capability is improved, but signal drift and reduced service life occur
Solution Approach 1:
The patent implements periodic action by alternating the operation of two groups of TFTs every 2 seconds. One group operates while the other rests, then they switch roles. This periodic operation allows each TFT to have regular rest intervals, preventing continuous operation-induced drift and extending service life while maintaining data multiplexing capability through the alternating operation of multiple TFT groups.
2Productivity
If six switch signals are used to control RGB pixels, then switching capability is improved, but wiring width and power consumption increase
Solution Approach 1:
The patent segments the six switch signals into two groups of three signals each. Each group controls RGB pixels for a specific time period. By dividing the control signals into segments that operate alternately, the patent reduces the number of signals active simultaneously, thereby reducing wiring width requirements and power consumption while maintaining the full switching capability through time-division multiplexing.
3Productivity
If six lines are used for signal output, then switching coverage is improved, but signal amplitude variation increases
Solution Approach 1:
The patent uses periodic action to alternately operate two groups of three switch signals every 2 seconds. This periodic operation allows the signal lines to have regular rest intervals, preventing continuous signal transmission that causes amplitude variation. The periodic switching maintains signal amplitude stability while achieving comprehensive switching coverage through the alternating operation of multiple line groups.
Data Source
AI summary
The present disclosure discloses a multiplex shift register unit and a driving circuit thereof, a display panel, and a display device. The multiplex shift register unit includes a shift register unit connected to an input terminal, a first power supply terminal, a second power supply terminal, a clock signal terminal, a reset terminal, and an output terminal respectively; and a multiplex unit connected to the output terminal, the first power supply terminal, the second power supply terminal, a first multiplex output terminal and a second multiplex output terminal respectively.