Four-Subpixel Display Layout for High-Frequency Data Charging
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Solution Overview
Problem
As display panel sizes increase, the reduced time to charge data voltage at higher driving frequencies leads to incomplete data charging in sub pixels, affecting image quality.
Innovation Solution
The display device employs a specific arrangement of sub pixels and circuit elements, including a data driver and gate driver, with optimized intervals and overlapping connections, to improve charging rates and reduce RC delays, ensuring efficient signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If driving frequency is increased to smoothly drive larger display panels, then display panel responsiveness is improved, but data charging time in sub pixels is sharply reduced causing incomplete data charging
Solution Approach 1:
The patent segments the display panel into multiple sub pixels (first, second, third, fourth sub pixels) arranged in specific patterns, allowing parallel data charging operations across different regions. This segmentation enables the driver to manage charging time more effectively by targeting specific sub pixel regions with data signals at optimized intervals, preventing complete charging failure at high driving frequencies.
Solution Approach 2:
The patent implements preliminary data voltage charging in sub pixels before the gate signal is applied. By pre-charging the data voltage in the storage capacitor during the data signal transmission period, the system ensures that voltage is ready when needed, reducing the effective charging time requirement and enabling operation at higher driving frequencies without incomplete charging.
2Manufacturing precision
If data signal charging is completed fully, then image quality is improved, but RC delay increases reducing charging rate
Solution Approach 1:
The patent applies different interval configurations to different groups of sub pixels based on their specific positions and charging requirements. The first interval between first and fourth sub pixels is configured differently from the second interval between second and third sub pixels, allowing optimized RC delay management for each region while maintaining overall image quality.
Solution Approach 2:
The patent dynamically adjusts the timing intervals for data signal transmission based on the specific sub pixel being charged. By varying the time intervals adaptively rather than using a fixed interval for all sub pixels, the system optimizes the charging rate for each region while ensuring complete charging, thus managing RC delay effects.
3Ease of manufacture
If sub pixels are arranged with uniform intervals, then manufacturing is simplified, but aperture ratio is reduced
Solution Approach 1:
The patent employs asymmetric interval configurations where the spacing between different sub pixel groups varies. Specifically, the interval between first and fourth sub pixels differs from the interval between second and third sub pixels, allowing optimization of the aperture ratio by creating more efficient light emission area distribution while maintaining manufacturability through systematic arrangement patterns.
Data Source
AI summary
In one aspect, a display device includes a display panel including a plurality of pixels, each of the plurality of pixels including a first sub pixel, a second sub pixel, a third sub pixel, and a fourth sub pixel; a data driver configured to supply a data signal to the plurality of pixels through data lines; and a gate driver configured to supply a gate signal to the plurality of pixels through gate lines. A first interval between first sub pixels and fourth sub pixels of the plurality of subpixels that are in the same column is the same, and a second interval between second sub pixels and third sub pixels of the plurality of subpixels in the same column is the same.