Shared Power-Line Layout in Display Substrates for Narrow Bezels

Solution Overview

Problem

Existing display technologies face challenges in achieving a narrow bezel design due to the spatial requirements of drive circuits, which occupy significant area and hinder the development of flexible and high-resolution displays.

Innovation Solution

The display substrate integrates high-level and low-level power supply lines that are shared among multiple drive circuits, allowing them to extend along a common direction, reducing the overall space required and enabling a narrow bezel design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of moving object

If drive circuits are arranged in the non-display region to control pixel circuits, then the display function is achieved, but the bezel width increases and the display area ratio decreases

Engineering Contradiction:

Improvedisplay areaVSAvoidbezel area

Core Design Contradiction:

Area of moving objectVSArea of stationary object

Solution Approach 1:

The patent applies dimensionality change by extending power supply lines along the first direction (row direction) and having drive circuits extend along the second direction (column direction), creating a grid-like arrangement that efficiently utilizes the non-display region. This dimensional arrangement allows drive circuits to be positioned at the periphery rather than occupying the entire non-display area, thereby reducing bezel width and increasing display area ratio.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent implements multi-functionality by designing power supply lines that serve multiple drive circuits simultaneously. The high-level power supply lines and low-level power supply lines are shared among multiple drive circuits, allowing a single power supply line to perform the function of multiple separate power supply lines. This reduces the total area occupied by power supply structures and enables narrower bezels.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If multiple drive circuits are arranged to control multiple pixel circuits, then the display resolution is improved, but the area occupied by drive circuits increases

Engineering Contradiction:

Improvedisplay resolutionVSAvoidarea occupied by drive circuits

Core Design Contradiction:

Measurement precisionVSArea of stationary object

Solution Approach 1:

The patent applies universality by designing power supply lines that serve multiple drive circuits simultaneously. The high-level power supply lines and low-level power supply lines are shared among multiple drive circuits, allowing a single power supply line to perform the function of multiple separate power supply lines. This reduces the total area occupied by power supply structures and enables narrower bezels.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent applies dimensionality change by extending power supply lines along the first direction (row direction) and having drive circuits extend along the second direction (column direction), creating a grid-like arrangement that efficiently utilizes the non-display region. This dimensional arrangement allows drive circuits to be positioned at the periphery rather than occupying the entire non-display area, thereby reducing bezel width and increasing display area ratio.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Area of moving object

If drive circuits are positioned to enable narrow bezel design, then the display area ratio increases, but the circuit layout complexity increases

Engineering Contradiction:

Improvedisplay area ratioVSAvoidcircuit layout complexity

Core Design Contradiction:

Area of moving objectVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the power supply distribution into two independent systems: high-level power supply lines and low-level power supply lines. Each system can be independently routed and controlled, which simplifies the layout process. The drive circuits are also segmented into multiple groups, each controlled by a dedicated drive circuit, allowing for modular design and easier fabrication.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies dimensionality change by extending power supply lines along the first direction (row direction) and having drive circuits extend along the second direction (column direction), creating a grid-like arrangement that efficiently utilizes the non-display region. This dimensional arrangement allows drive circuits to be positioned at the periphery rather than occupying the entire non-display area, thereby reducing bezel width and increasing display area ratio.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20250292734A1Display substrate and display apparatus

Publication Date: 2025.09.18 CHENGDU BOE OPTOELECTRONICS TECH CO LTD

AI summary

Disclosed are a display substrate and a display apparatus, the display substrate includes a display region and a non-display region, the display substrate includes a base substrate and a circuit structure layer disposed on the base substrate, the circuit structure layer includes multiple pixel circuits arranged in an array and located in the display region and multiple drive circuits located in the non-display region. At least one pixel circuit includes multiple transistors and the multiple drive circuits are configured to provide drive signals to the multiple transistors; the circuit structure layer further includes: a high-level power supply line and a low-level power supply line located in the non-display region, at least one drive circuit is electrically connected with the high-level power supply line and the low-level power supply line respectively, and the high-level power supply line and the low-level power supply line extend along a first direction.