Display Data Lines with Switching Elements for RC Delay Reduction
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Solution Overview
Problem
Display apparatuses face signal delays due to resistive-capacitive (RC) delays on signal lines, which can prevent pixels from being charged with data voltages, leading to incomplete image display.
Innovation Solution
The implementation of a display apparatus with switching elements and dummy elements connected to data lines, where the switching elements have a larger channel width than the dummy elements, and a demultiplexer that uses these elements to increase the current provided to data lines, allowing for efficient charging of pixels during specific periods of the gate signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data voltages are supplied to pixels through data lines, then pixels can be charged with data voltages, but RC delay causes signal delay preventing complete charging
Solution Approach 1:
The patent applies preliminary action by pre-charging data lines through switching elements before actual pixel charging occurs. The switching elements are activated in advance to establish conductive paths and reduce the RC time constant, enabling faster subsequent charging of pixels without waiting for the full RC delay period
Solution Approach 2:
The patent changes the electrical parameters of the data lines by introducing switching elements that can alter the resistance and capacitance characteristics dynamically. By controlling the switching elements, the effective R and C values are modified to reduce the RC delay, thereby improving the charging speed while maintaining signal integrity
2Power
If switching elements with larger channel width are used, then current through data lines increases, but device complexity increases
Solution Approach 1:
The patent segments the current path by introducing multiple switching elements distributed along the data lines rather than using a single complex high-current switch. Each switching element operates independently with smaller individual channel widths, collectively providing the necessary current while maintaining manageable device complexity and enabling independent control of different signal paths
Solution Approach 2:
The patent introduces dummy elements as intermediary components between the switching elements and the pixels. These dummy elements act as mediators that help balance the electrical characteristics of the data lines, enable controlled current distribution, and simplify the design of the main switching elements by providing auxiliary current paths and capacitance matching
Data Source
AI summary
A display apparatus includes a plurality of gate lines, a plurality of data lines, wherein the plurality of data lines includes a plurality of first and second data line pairs, a plurality of pixels connected to the gate lines and the data lines, driving lines connected to the second data lines, a plurality of switching elements connected to the first data lines and the driving lines, and a plurality of dummy elements respectively connected to a corresponding pair of the first and second data lines, wherein the switching elements and the dummy elements are turned on in response to a switching signal.