Source Driver Polarity Control via Embedded Data Stream
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Solution Overview
Problem
Conventional liquid crystal display technologies require extra pins and increased circuit costs to control polarity sequences for source drivers, leading to polarity discontinuation issues during horizontal two dot inversion and H4 Inversion mechanisms.
Innovation Solution
A method where polarity controlling information is embedded within the image data stream or data input/output indication signal, allowing source drivers to control driving signal polarities without additional pins, utilizing a signal receiving interface, decoder, and controller to determine and set the necessary polarity sequences for source driving signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If extra pins are added on source drivers to receive different polarity controlling information, then polarity control capability is improved, but device complexity and circuit costs increase
Solution Approach 1:
The patent merges the polarity control function with the existing data transmission pathway by embedding polarity control information within the image data stream or data input/output indication signal. This eliminates the need for separate dedicated pins, as the same transmission channel carries both data and control information, thereby reducing device complexity while maintaining polarity control capability.
Solution Approach 2:
The existing data transmission interface is made multi-functional by enabling it to carry both image data and polarity control information simultaneously. The signal receiving interface and processing circuits handle both types of information through the same physical pins, making the interface universal and eliminating the need for additional dedicated pins for polarity control.
2Adaptability or versatility
If extra transmitting lines are added to provide polarity control signals, then polarity control is enabled, but circuit costs increase
Solution Approach 1:
The patent combines the polarity control signal transmission with the existing data transmission lines. The polarity control information is embedded within the image data stream or data input/output indication signal, allowing both data and control information to share the same physical transmission pathway, thereby eliminating the need for extra transmitting lines and reducing circuit costs.
Solution Approach 2:
The existing data transmission infrastructure serves dual purposes by simultaneously transmitting image data and polarity control information. The same pins and transmission lines that carry data also carry control signals, making the existing circuitry self-sufficient for both functions without requiring additional dedicated transmission pathways.
Data Source
AI summary
A liquid crystal display apparatus, a source driver, and a method for controlling polarity of driving signals thereof are provided. The source driver includes a signal receiving interface, a decoder, and a controller. The signal receiving interface receives an image data stream or a data input/output indication signal. The decoder obtains polarity controlling information from the image data stream or the data input/output indication signal. The controller receives the polarity controlling information and decides driving polarities of a plurality of source driving signals generated by the source driver according to the polarity controlling information.