In-Panel Gate Driving Layout for Narrow-Bezel Bi-Directional Displays
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Solution Overview
Problem
Current display devices face challenges in reducing the bezel area and achieving bi-directional operation of gate driving circuits, which affects manufacturing costs and display efficiency, especially when using inorganic light-emitting elements.
Innovation Solution
The proposed solution involves a gate driving circuit with a distributed configuration that includes input signal separation, Q node charging, and QB node holding circuits, allowing bi-directional operation and reducing manufacturing costs by integrating these circuits within the display area, thereby minimizing the bezel size and enhancing light-emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the gate driving circuit is disposed outside the display area, then the circuit operation is simple, but the bezel area increases
Solution Approach 1:
The gate driving circuit is moved from a peripheral position (outside the display area) to an integrated position (within the display area), utilizing the spatial dimension of the display panel itself. This integration reduces the bezel area while the bi-directional operation capability handles the increased operational complexity through efficient signal routing in both forward and reverse directions.
Solution Approach 2:
The gate driving circuit is designed with bi-directional operation capability, allowing it to function in both forward and reverse directions. This multi-functionality enables the circuit to efficiently manage signal transmission regardless of its position within the display area, resolving the complexity issue while achieving bezel reduction.
2Manufacturing precision
If the gate driving circuit operates in a single direction, then the circuit structure is simple, but the light-emission signal accuracy is insufficient
Solution Approach 1:
The gate driving circuit transitions from a static single-direction operation to a dynamic bi-directional operation mode. This dynamic capability allows the circuit to adaptively select the optimal signal transmission direction based on operational requirements, thereby improving light-emission signal accuracy while managing structural complexity through intelligent control.
Solution Approach 2:
The bi-directional operation mechanism incorporates feedback control to monitor and adjust signal transmission quality. By enabling signals to travel in both directions, the system can detect and correct transmission errors, improving light-emission signal accuracy while the feedback loop manages the added structural complexity.
3Area of stationary object
If the gate driving circuit is disposed in a distributed manner within the display area, then the bezel area is reduced, but the signal transmission complexity increases
Solution Approach 1:
The gate driving circuit is segmented into multiple distributed units positioned within different regions of the display area. Each segment handles local signal transmission independently, reducing the overall complexity of long-distance signal routing. The bi-directional capability of each segment further simplifies transmission by allowing flexible signal direction selection.
Solution Approach 2:
The distributed gate driving circuits act as intermediary elements between the display pixels and the external control system. By positioning these circuits within the display area, they serve as local mediators that simplify signal transmission paths and reduce the complexity of long-distance signal routing while maintaining bezel reduction.
Data Source
AI summary
A display device includes a substrate including a plurality of pixel areas and a plurality of driving circuit areas, wherein each of the plurality of driving circuit areas is disposed between adjacent pixel areas; a plurality of pixel circuits respectively disposed in the plurality of pixel areas; a plurality of light-emission driving circuits respectively disposed in the plurality of driving circuit areas; a light-emission line disposed on the substrate and extending in a row direction, and connected to the pixel circuits arranged in the row direction; a plurality of light-emission driving lines disposed on the substrate and extending in the row direction; a plurality of clock signal lines disposed on the substrate and extending in a column direction; and a plurality of light-emitting elements disposed in each of the plurality of pixel areas.