Source Driver Polarity Control via Data Stream Embedding
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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 indication signal, allowing source drivers to generate driving signals without additional pins, using 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 invention makes the existing pins on source drivers perform multiple functions: they both transmit image data and convey polarity controlling information. By embedding polarity control data within the image data stream, the same physical pins serve dual purposes, eliminating the need for separate dedicated pins for polarity control and thereby reducing device complexity while maintaining polarity control capability.
Solution Approach 2:
The invention merges the polarity controlling information with the image data stream into a single transmission channel. Instead of using separate pins for image data and polarity control, both types of information are combined and transmitted through the existing image data pins, reducing the total number of pins required while preserving both functions.
2Adaptability or versatility
If extra transmitting lines are added to provide polarity control signals, then polarity control capability is improved, but circuit costs increase
Solution Approach 1:
The existing transmitting lines that carry image data are made to also carry polarity controlling information. By encoding polarity control signals within the existing data transmission infrastructure, the invention eliminates the need for additional dedicated transmitting lines, thereby reducing circuit complexity and costs while maintaining full polarity control functionality.
Solution Approach 2:
The invention combines polarity control signals with image data transmission by embedding the control information within the image data stream. This merging approach allows both image data and polarity control to share the same transmitting lines, eliminating the need for separate extra transmitting lines and reducing overall circuit costs.
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 an indication signal. The decoder obtains controlling information from the image data stream or the indication signal. The controller receives the controlling information and decides a plurality of source driving signals generated by the source driver according to the controlling information.