Light-Obstructing Layer for Leakage Current Reduction in TFT Display Panels
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Solution Overview
Problem
Thin film transistor-liquid crystal displays (TFT-LCDs) face issues with leakage current due to their structure, which affects safety, energy efficiency, and normal operation, especially when exposed to backlighting.
Innovation Solution
A display panel design featuring a substrate with active switches, where a light-obstructing layer is disposed on the insulation medium layer surrounding the gate layer, effectively obstructing leakage current and enhancing the device's quality and lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the inverted staggered TFT structure is used, then the device can be manufactured with existing processes, but leakage current is generated due to backlight interference
Solution Approach 1:
A light-obstructing layer is introduced as an intermediary component between the backlight and the TFT structure. This layer specifically blocks light from reaching the gate electrode and source/drain regions, preventing the generation of leakage current while allowing the inverted staggered TFT manufacturing process to continue unchanged
2Object-generated harmful factors
If the light-obstructing layer is extended to both sides of the gate layer, then leakage current obstruction is improved, but device complexity increases
Solution Approach 1:
The light-obstructing layer is strategically positioned only at specific locations where light interference causes leakage current - namely the sides of the gate electrode and source/drain regions. This localized approach provides effective leakage current obstruction without the need to complicate the entire device structure
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
The light-obstructing layer reduces leakage current, improving the performance and longevity of the TFT device by preventing backlight interference and enhancing contrast ratio and color purity.
Implementation Method 1
The light-obstructing layer comprises a first light-obstructing layer disposed on the first side portion and a second light-obstructing layer disposed on the second side portion... the light-obstructing layer is made of a non-metallic material... the light-obstructing layer obstructs the leakage current generated by the backlight
Data Source
AI summary
A display panel, a manufacturing method thereof and a display device are provided. The display panel includes a substrate and a plurality of active switches disposed on the substrate. The active switch includes a gate layer disposed on a bottom portion. The gate layer is wound with an insulation medium layer, and the insulation medium layer includes a light-obstructing layer disposed on a side portion of the gate layer.