Display Panel Scan Signal Amplitude Compensation for RC Delay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display apparatuses face increased RC delay and decreased image quality due to signal wiring length, which occurs when drivers are placed adjacent to one side of the display panel, leading to longer signal paths and reduced response time.
Innovation Solution
The display apparatus includes a display panel with scan lines, data lines, and light emission lines, where each scan signal has a first and second level, and the amplitude of scan signals applied to subsequent lines increases, ensuring sufficient charging time for data voltages and improving image quality by managing RC delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If drivers are placed adjacent to one side of the display panel, then device complexity is reduced and ease of manufacture is improved, but RC delay increases and image quality deteriorates
Solution Approach 1:
The patent applies local quality by making scan signal amplitudes position-dependent. Scan signals applied to scan lines farther from the driver have larger amplitudes than those closer to the driver. This compensates for the increased RC delay in longer wiring paths, ensuring uniform charging performance across all pixels regardless of their distance from the driver, thereby maintaining image quality while keeping the driver at one side.
2Ease of manufacture
If signal wiring path is lengthened to accommodate side-mounted drivers, then ease of manufacture is improved, but response time increases due to RC delay
Solution Approach 1:
The patent changes the parameter of scan signal amplitude based on position. By increasing the amplitude of scan signals for scan lines with longer wiring paths, the patent compensates for the increased RC delay. This parameter adjustment ensures that all pixels receive sufficient charging current within the same time frame, maintaining response time performance despite varied wiring lengths.
Data Source
AI summary
A display apparatus includes a plurality of pixels, and a plurality of scan lines, a plurality of data lines, and a plurality of light emission lines connected to the pixels. Scan signals are applied to the pixels through the scan lines, each of the scan signals has a first level and a second level higher than the first level, an amplitude of each of the scan signals is a difference between the first level and the second level, and the amplitude of a scan signal applied to an (h+1)th scan line is larger than the amplitude of a scan signal applied to an hth scan line.