Display Driving Circuit Layout for Ultra-Narrow Bezel Panels
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Solution Overview
Problem
Conventional display device designs struggle to reduce the frame width effectively due to the need for reserved space for peripheral routing and driving circuits.
Innovation Solution
The display device incorporates a pixel array substrate with transmission pillars that penetrate the support plate, connecting signal lines and transmission lines on opposite surfaces, allowing the transmission lines and driving circuit to be disposed on the opposite surface of the signal lines, thereby minimizing the peripheral area required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If transmission lines and driving circuits are disposed on the same surface as signal lines, then routing is simplified, but the frame width increases due to required reserved area
Solution Approach 1:
The patent moves transmission lines from the front surface to the back surface of the substrate, utilizing the third dimension (depth/thickness) to resolve the spatial conflict. This allows signal lines, transmission lines, and driving circuits to coexist without overlapping in the planar dimension, thereby reducing frame width while maintaining routing functionality.
Solution Approach 2:
The patent divides the substrate into distinct functional regions: the front surface for pixel circuits and signal lines, and the back surface for transmission lines and driving circuits. This segmentation allows each component to be optimized independently and eliminates the need for reserved peripheral areas on the front surface.
2Area of moving object
If peripheral area is reserved for transmission lines and driving circuits, then routing is ensured, but the display area is reduced
Solution Approach 1:
By relocating transmission lines to the back surface of the substrate, the patent eliminates the need for peripheral reserved areas that would otherwise reduce the display area. The routing is implemented in the vertical dimension rather than consuming horizontal display space.
3Area of stationary object
If frame width is reduced, then device size is minimized, but space for driving circuits is insufficient
Solution Approach 1:
The patent places driving circuits on the back surface of the substrate, utilizing the vertical dimension to accommodate them within the narrow frame structure. This allows the driving circuits to be integrated without increasing the planar frame area.
Data Source
AI summary
A display device, including a pixel array substrate, a display layer, and a driving circuit, is provided. The pixel array substrate includes a support plate, a pixel circuit array disposed on a first surface of the support plate, first and second transmission pillars, and first and second transmission lines disposed on a second surface of the support plate. The first transmission pillars are located between the pixel circuit array and a first edge of the support plate. The second transmission pillars are located between the pixel circuit array and a second edge of the support plate. The first transmission lines are respectively connected to the first transmission pillars. The second transmission lines are respectively connected to the second transmission pillars. The display layer overlaps with the first and second transmission lines. The first transmission lines and the second transmission lines are electrically connected to the driving circuit.