Display Sub-Pixel Layout With Parking Voltage Lines for Flicker Reduction
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Solution Overview
Problem
Display devices face challenges in stabilizing luminance while reducing power consumption and minimizing external noise, particularly when varying driving frequencies.
Innovation Solution
The display device incorporates a substrate design with first and second sub-pixels in alternating columns, data lines on either side of the sub-pixels, and parking voltage lines between the columns, which are electrically connected during blank frames to form parasitic capacitance, reducing flicker and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If driving frequency is varied to reduce power consumption, then power consumption is reduced, but luminance stability deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-charging the storage capacitor during a specific period before the emission period. This ensures that the capacitor is fully charged before emission begins, maintaining stable luminance even when driving frequency varies. The storage capacitor is charged during a predetermined period that ends before the emission period starts, preventing luminance instability caused by frequency variations.
2Use of energy by stationary object
If driving frequency is varied to reduce power consumption, then power consumption is reduced, but external noise increases
Solution Approach 1:
The patent applies preliminary action by completing the charging of the storage capacitor before the emission period begins. This timing arrangement ensures that capacitor charging operations are finished prior to emission, preventing noise generation during the emission period and reducing external noise overall.
3Stability of the object's composition
If storage capacitor charging period is extended to improve luminance compensation, then luminance compensation is improved, but response time increases
Solution Approach 1:
The patent applies preliminary action by charging the storage capacitor during a predetermined period that ends before the emission period starts. This approach improves luminance compensation by ensuring the capacitor is fully charged in advance, while simultaneously maintaining fast response time because the charging completes before emission begins, not extending into the emission period.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design stabilizes luminance by increasing parasitic capacitance for luminance compensation, reduces power consumption, and minimizes flicker and external noise, especially during frequency variations.
Implementation Method 1
parking voltage lines disposed between a first column of the plurality of first sub-pixels and a second column of the plurality of second sub-pixels, and configured to be electrically connected to some of the plurality of data lines
Data Source
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AI summary
A display device according to an example of the present disclosure may include a substrate on which a plurality of first sub-pixels disposed in first columns and a plurality of second sub-pixels disposed in second columns are defined; a plurality of data lines disposed on one sides of the plurality of first sub-pixels and the other sides of the plurality of second sub-pixels; and a plurality of parking voltage lines disposed between the plurality of first sub-pixels and the plurality of second sub-pixels, wherein the plurality of parking voltage lines are configured to be electrically connected to some of the plurality of data lines. Accordingly, by applying the same parking voltage to the parking voltage lines and the data lines during a blank frame, flicker can be reduced.