Display Panel Sub Data Line Segmentation for RC Delay Reduction
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Solution Overview
Problem
As display panel sizes increase, the high driving frequency required to smoothly operate them results in inadequate charging of sub pixels, leading to impaired image quality due to RC delay and mismatched refresh rates.
Innovation Solution
A display device design that includes a sensing transistor to monitor and compensate for the characteristic values of sub pixels, with data lines divided into sub data lines on both sides of the sub pixels, and a specific gate-turn on order for odd and even frames to control data charging rates, reducing RC delay and ensuring consistent charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the driving frequency is increased to smoothly drive the display panel, then the display panel can be driven more smoothly, but the time to charge a data voltage of a sub pixel is rapidly reduced causing incomplete charging
Solution Approach 1:
The patent divides each data line into multiple sub data lines (first sub data line and second sub data line) that are disposed on opposite sides of the sub pixels. This segmentation allows data voltage to be supplied to sub pixels from multiple directions simultaneously, effectively increasing the charging rate and enabling complete charging even at high driving frequencies.
2Productivity
If the driving frequency is increased, then the refresh rate can be increased, but the charging ability of the sub pixels lags behind the refresh rate
Solution Approach 1:
The patent transitions from a single-sided data line configuration to a dual-sided configuration where sub data lines are positioned on both the left and right sides of the sub pixels. This dimensional change in the data line arrangement enables simultaneous charging from multiple directions, allowing the charging ability to keep up with high refresh rates.
3Productivity
If data lines are divided into sub data lines on both sides of sub pixels, then the data charging rate is increased, but the device complexity increases
Solution Approach 1:
The sub data lines are configured to serve multiple sub pixels simultaneously by being positioned on both sides of the pixel array. Each sub data line acts as a multi-functional conductor that supplies data voltage to multiple sub pixels in parallel, reducing the overall number of separate data lines needed while maintaining high charging rates.
Data Source
AI summary
A display device can include a display panel having a plurality of pixels, each of the plurality of pixels including a plurality of sub pixels having different colors, a data driver to supply a data voltage to the plurality of pixels via a plurality of data lines, and a gate driver to supply a gate signal to the plurality of pixels via a plurality of gate lines. Also, the plurality of sub pixels are sequentially disposed in a same column, each of the plurality of data lines is divided into two sub data lines, and the two sub data lines are disposed on opposite sides of the plurality of sub pixels disposed in the same column.