Dummy Gate-in-Panel Circuits for Rounded Display Reliability
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Solution Overview
Problem
In display devices with gate-in-panel (GIP) technology, the variation in signal lines between gate drivers leads to capacitance differences, degrading image quality and causing transistor deterioration due to stepped signal lines on rounded display panels.
Innovation Solution
The introduction of dummy GIP circuits between signal lines and GIP circuits on a rounded display panel, along with symmetrical signal line arrangements on both sides of the active area, minimizes signal variations and prevents transistor deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If signal lines are disposed in pad areas with rounded structure, then the display panel achieves a rounded shape, but the stepped shape of signal lines increases the distance to GIP circuits causing transistor deterioration
Solution Approach 1:
Dummy GIP circuits are introduced as intermediary elements between the signal lines and the actual GIP circuits. These dummy circuits act as a buffer that blocks the harmful electric fields generated by the stepped signal lines, preventing direct interference with the transistor structures of the real GIP circuits and thus preventing transistor deterioration.
Solution Approach 2:
The patent converts the harmful stepped shape of signal lines into a beneficial arrangement by positioning dummy GIP circuits in the spaces created by the stepped structure. The dummy circuits utilize the electric field effects of the stepped signal lines to block harmful interference, transforming a structural defect into a protective mechanism.
2Device complexity
If different numbers of signal lines are disposed in gate driver areas, then the gate driver structure can be simplified, but capacitance variations are created between gate drivers degrading image quality
Solution Approach 1:
The patent applies local quality by making the number of signal lines and dummy GIP circuits local to each gate driver area. Each gate driver is configured with the same number of signal lines and dummy circuits in its immediate vicinity, creating localized symmetry that ensures consistent capacitance characteristics for each gate driver, thereby maintaining signal consistency across the display panel.
Solution Approach 2:
Dummy GIP circuits are copied and placed in corresponding positions adjacent to actual GIP circuits. This copying creates symmetric patterns that ensure both gate drivers have identical signal line configurations and capacitance characteristics, eliminating variations in signal output while maintaining structural simplicity.
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 configuration enhances the reliability of gate driver circuits, reduces defects, and improves image quality by blocking electric fields and maintaining consistent signal output.
Implementation Method 1
dummy gate-in-panel (GIP) circuits are disposed between signal lines and GIP circuits on a rounded display panel, thereby preventing the GIP circuits from deteriorating
Data Source
AI summary
A display device includes a display panel including an active area having a plurality of subpixels and a pad area disposed along the active area; a gate driver in the pad area of the display panel and having a plurality of gate-in-panel circuits; a first signal line outside of the gate driver; a second signal line between the gate driver and the active area; and a plurality of dummy gate-in-panel circuits adjacent to the plurality of gate-in-panel circuits.