Array Substrate Layout With Backside GOA for Higher Pixel Aperture
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Solution Overview
Problem
In existing liquid crystal display devices, the wiring of the gate driver on array (GOA) circuit occupies space in the display region, leading to a decrease in pixel aperture ratio, particularly for 8K products with low transmittance requirements.
Innovation Solution
The GOA circuit and pixel driving circuit are positioned on opposite sides of a substrate with via holes, allowing them to overlap in space, reducing the occupied area and increasing the pixel aperture ratio by connecting through these holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the GOA circuit is designed in the display region to achieve ultra-narrow bezels, then the bezel width is reduced, but the pixel aperture ratio decreases due to wiring occupation
Solution Approach 1:
The patent applies dimensionality change by moving the GOA circuit from the front surface (2D plane) to the back surface of the substrate. This spatial relocation allows the circuit to occupy a different dimensional space, eliminating its footprint from the display region while maintaining electrical connectivity through via holes that penetrate the substrate thickness dimension.
Solution Approach 2:
The patent implements nesting by integrating the GOA circuit within the substrate structure itself. The circuit is embedded in the back surface and connected through via holes that nest within the substrate thickness, creating a compact integrated structure that eliminates external wiring occupation in the display region.
2Extent of automation
If wiring methods occupy space in the display region, then the GOA circuit can be implemented, but the pixel aperture ratio decreases
Solution Approach 1:
The patent extracts the GOA circuit from the display region by relocating it to the back surface of the substrate. This separation removes the harmful occupation of display area by wiring, while the circuit functionality is preserved through the via hole connection system that bridges the two surfaces.
3Illumination intensity
If the pixel aperture ratio is increased to improve transmittance, then the display region space is reduced, but the GOA circuit wiring requires sufficient space
Solution Approach 1:
The patent resolves this contradiction by utilizing the substrate thickness dimension to accommodate the GOA circuit wiring. By routing wires on the back surface and connecting through via holes, the circuit occupies the Z-dimension rather than the XY-plane, allowing maximum pixel aperture ratio while maintaining adequate wiring space in three-dimensional space.
Data Source
AI summary
The present disclosure provides an array substrate, including a display region, and the display region includes driving circuit regions. The array substrate includes a first substrate, a gate driver on array (GOA) circuit and a pixel driving circuit respectively disposed on opposite sides of the first substrate and located in the driving circuit regions. The GOA circuit is connected with the pixel driving circuit through a plurality of via holes, so wiring regions of the GOA circuit and wiring regions of the pixel driving circuit can overlap in space, thereby reducing space occupied by a pixel display region and increasing a pixel aperture ratio.