Timing Control Circuit RSDS Terminals Residual Image
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Solution Overview
Problem
LCDs in residual image reducing mode require timing control circuits to operate at double the normal frequency, exceeding the endurable frequency of data drivers, leading to increased costs due to the need for additional data drivers to handle additional black image data.
Innovation Solution
A timing control circuit with multiple reduced swing differential signaling (RSDS) output terminals connected to data drivers via independent lines, allowing the working frequency to be controlled within the endurable range of data drivers, eliminating the need for additional data drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the timing control circuit operates at double frequency to transmit normal image data and black image data, then residual image quality is improved, but the working frequency exceeds the endurable frequency of data drivers
Solution Approach 1:
The patent divides the data transmission paths into separate independent lines: one line transmits normal image data while another line transmits black image data. This segmentation allows the timing control circuit to operate at double frequency without overloading a single data driver, as each data driver handles only one type of data at the original frequency.
Solution Approach 2:
The patent introduces an intermediary structure (independent conducting lines) between the timing control circuit and data drivers. This intermediary enables the timing control circuit to operate at higher frequency while data drivers operate at their endurable frequency, effectively mediating the frequency mismatch.
2Reliability
If additional data drivers are added to handle black image data, then residual image quality is improved, but device complexity and cost increase
Solution Approach 1:
The patent segments the data transmission function by creating independent conducting lines for normal image data and black image data. This allows existing data drivers to be reused without adding new ones, as each driver handles a segmented portion of the total data stream.
Solution Approach 2:
The patent makes the existing data drivers multi-functional by enabling them to handle different types of data (normal image data or black image data) through independent conducting lines. This universality eliminates the need for additional dedicated data drivers for black image data.
3Reliability
If additional data drivers are added to handle black image data, then residual image quality is improved, but manufacturing cost increases
Solution Approach 1:
The patent segments the data transmission paths into independent conducting lines, allowing existing data drivers to be reused. This segmentation approach avoids the need for additional expensive components, thereby reducing manufacturing cost while maintaining residual image quality.
Solution Approach 2:
The patent creates a parallel transmission path for black image data that copies the structure of the normal image data path. This copying approach uses existing driver circuits and only adds minimal routing infrastructure, significantly reducing manufacturing cost compared to adding entirely new driver components.
Data Source
AI summary
An exemplary liquid crystal display (LCD) (20) includes an LCD panel (24), a timing control circuit (21), a plurality of gate drivers (23) connected to the LCD panel, and a plurality of data drivers (22) connected to the LCD panel. The timing control circuit includes a plurality of reduced swing differential signaling (RSDS) output terminals. Each data driver is electrically connected to a respective RSDS output terminal of the timing control circuit via an independent conducting line.