Gate Driver for Narrow Bezel Electroluminescent Display
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Solution Overview
Problem
In high-resolution electroluminescent display apparatuses, the increasing number of gate lines leads to a larger bezel area due to the increased number of gate stages, limiting the reduction of the bezel size and affecting operation stability due to leakage currents.
Innovation Solution
A gate driver with simplified gate stage configurations that operate based on a clock without driving power, incorporating a leakage current blocker to prevent leakage currents and stabilize operation, thereby reducing the bezel area and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of gate stages is increased to support high-resolution display, then the display resolution is improved, but the bezel area increases
Solution Approach 1:
The patent combines multiple functions into a single gate stage circuit. The gate stage performs both signal transmission and leakage current blocking functions through integrated transistor configurations, reducing the number of discrete components and overall circuit area required per gate line.
Solution Approach 2:
The patent extracts the leakage current blocking function from a separate circuit component and integrates it directly into the gate stage transistor structure. This eliminates the need for additional dedicated leakage blocking components, thereby reducing the total area occupied by each gate stage.
2Measurement precision
If the number of gate stages is increased to support high-resolution display, then the display resolution is improved, but the device complexity increases
Solution Approach 1:
The patent merges the leakage current blocking function with the gate stage signal transmission function into a single integrated circuit structure. This consolidation reduces the total number of discrete components and simplifies the overall gate driver architecture despite supporting high-resolution displays.
3Ease of operation
If traditional gate stage configuration is used, then the circuit operation is maintained, but leakage current affects operation stability
Solution Approach 1:
The patent converts the harmful leakage current effect into a beneficial operation by implementing a complementary transistor structure where one transistor's leakage is compensated by another transistor's opposing characteristics. This complementary configuration maintains signal integrity while actively counteracting leakage current effects.
Solution Approach 2:
The patent introduces a complementary transistor as an intermediary element between the signal path and ground. This intermediary transistor actively regulates and blocks leakage currents while maintaining the normal signal transmission function, thereby stabilizing the overall circuit operation.
Data Source
AI summary
Each gate stage of a gate driver may be implemented to operate based on a clock, a set signal, and a reset signal without a driving power, and thus, may not be connected to the driving power. Accordingly, because a driving power line is omitted, a mount area of the gate driver may be reduced, and thus, a narrow bezel may be easily implemented. Each gate stage may be implemented based on the clock without the driving power, and thus, a configuration thereof may be simplified. In this case, because each gate stage includes a leakage current blocker, even when the gate stage is manufactured based on an oxide transistor having a depletion characteristic, the operation stability thereof may be secured.