Display Substrate Layout for Narrow-Bezel Gate Drive Circuits
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Solution Overview
Problem
Existing display substrates face challenges in achieving a narrow bezel design due to the layout and arrangement of drive circuits, which hinder the development of flexible and visually appealing displays.
Innovation Solution
The display substrate incorporates a drive circuit layer with overlapping orthographic projections of initial power supply lines and gate drive circuits, along with specific arrangements of signal lines and transistors, to optimize the layout and enable a narrow bezel design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the gate drive circuit and initial power supply line are arranged separately without overlap, then the layout is simpler and easier to manufacture, but the bezel width increases and flexibility is reduced
Solution Approach 1:
The patent merges the gate drive circuit and initial power supply line into the same region, allowing their orthographic projections to overlap. This combining approach enables the initial power supply line to pass through the gate drive circuit region, thereby reducing the bezel width by utilizing the same spatial area for multiple functions.
Solution Approach 2:
The patent employs multi-layer routing where the initial power supply line and gate drive circuit are positioned on different layers. This dimensional separation allows their projections to overlap on the substrate plane while maintaining electrical isolation through layer differentiation, thus reducing bezel width without causing short circuits.
2Adaptability or versatility
If the initial power supply line extends far to provide initial signals to pixel drive circuits, then signal coverage is improved, but the layout area increases and flexibility is reduced
Solution Approach 1:
The gate drive circuit serves as an intermediary structure that the initial power supply line passes through. This intermediary arrangement allows the initial power supply line to extend across the substrate to provide initial signals to pixel drive circuits while utilizing the gate drive circuit region as a conduit, thereby achieving extensive signal coverage without proportionally increasing the layout area.
Data Source
AI summary
A display substrate and a display apparatus. The display substrate includes a base substrate and a drive circuit layer provided on the base substrate. The base substrate includes a display region (100) and a non-display region (200), the drive circuit layer includes a pixel drive circuit (PE) located in the display region, a gate drive circuit located in the non-display region and at least one initial power supply line extending at least partially in a first direction (D1). The gate drive circuit is configured to provide a drive signal to the pixel drive circuit, and the initial power supply line is configured to provide an initial signal to the pixel drive circuit. An orthographic projection of at least one of the at least one initial power supply line on the base substrate is at least partially overlapped with an orthographic projection of the gate drive circuit on the base substrate.