Source Driver Polarity Inversion Control Circuit Area Reduction
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Solution Overview
Problem
Conventional source drivers require a large number of signal generating circuits to accommodate different polarity configurations for display panels, leading to increased circuit area usage due to the need for level shifters to operate in both low and high voltage ranges.
Innovation Solution
A source driver with a polarity inversion control circuit that includes a shared signal generating circuit and a routing circuit, which generates and routes switching control signals based on a polarity inversion configuration signal, allowing multiple channel pairs to share the same signal generating circuit and reduce circuit area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple signal generating circuits are used to accommodate different polarity configurations, then the display panel can operate in various polarity modes, but the circuit area increases due to repeated level shifters
Solution Approach 1:
The patent implements a single signal generating circuit that can generate switching control signals for multiple polarity configurations (normal polarity, inverted polarity, and other custom configurations). This universal circuit replaces multiple dedicated signal generating circuits, allowing the same hardware to adapt to different display panel requirements through software or control logic configuration, thereby reducing circuit area while maintaining versatility
Solution Approach 2:
The patent merges multiple signal generating circuits into one shared circuit that serves all channel pairs. By combining the functionality of what would traditionally require separate circuits for each polarity configuration into a single shared resource, the design reduces the total number of level shifters and associated components, directly reducing circuit area occupation
2Area of stationary object
If a shared signal generating circuit is used for multiple channel pairs, then circuit area is reduced, but the routing complexity increases to manage different polarity configurations
Solution Approach 1:
The patent introduces a routing circuit as an intermediary component that manages the interaction between the shared signal generating circuit and multiple output switching circuits. This routing circuit receives the polarity configuration signal and intelligently routes the appropriate switching control signals to the correct channel pairs, abstracting away the complexity from the signal generating circuit and providing a systematic way to handle different polarity configurations without directly increasing overall system complexity
Data Source
AI summary
A source driver and a polarity inversion control circuit are provided. The source driver includes a plurality of channel pairs and the polarity inversion control circuit. The polarity inversion control circuit includes a signal generating circuit and a routing circuit. The signal generating circuit generates a polarity control signal. The routing circuit outputs a plurality of switching control signals corresponding to the polarity control signal to a plurality of output switching circuits of the channel pairs. The routing circuit changes the correspondence between the polarity control signal and the switching control signals according to a polarity inversion configuration signal.