Light-emitting substrate, backlight, display device

Solution Overview

Problem

Existing liquid crystal display devices face challenges in achieving high contrast, luminance uniformity, and stability due to limitations in the design of backlights, particularly in reducing the resistance and voltage drop of signal lines while maintaining efficient luminance and uniformity.

Innovation Solution

A light-emitting substrate is designed with a specific arrangement of signal lines, where the first and second signal lines have portions extending along a direction in the peripheral region and into the light-emitting region, allowing for a narrower width of the signal lines without increasing resistance or voltage drop, thus enabling uniform luminance and reduced production costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If the width of signal lines is reduced to achieve narrow frames, then the frame width is reduced, but the resistance and voltage drop of signal lines increase

Engineering Contradiction:

Improveframe widthVSAvoidsignal line resistance and voltage drop

Core Design Contradiction:

Length of moving objectVSReliability

Solution Approach 1:

The signal line is divided into multiple segments: a first signal line portion in the peripheral region and a second signal line portion in the light-emitting region. This segmentation allows each portion to be optimized independently for its specific functional requirements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the signal line are designed with different widths according to their local requirements. The first portion in the peripheral region has a narrower width to reduce frame size, while the second portion in the light-emitting region has a wider width to maintain low resistance and voltage drop.

Inventive Principle:

Principle #3Local quality

2Reliability

If the width of signal lines is increased to reduce resistance and voltage drop, then the reliability is improved, but the frame width increases

Engineering Contradiction:

Improvesignal line resistance and voltage dropVSAvoidframe width

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The signal line is divided into multiple segments: a first signal line portion in the peripheral region and a second signal line portion in the light-emitting region. This segmentation allows each portion to be optimized independently for its specific functional requirements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the signal line are designed with different widths according to their local requirements. The first portion in the peripheral region has a narrower width to reduce frame size, while the second portion in the light-emitting region has a wider width to maintain low resistance and voltage drop.

Inventive Principle:

Principle #3Local quality

3Area of stationary object

If the signal lines are made narrow to reduce area, then the frame width is reduced, but the luminance uniformity deteriorates

Engineering Contradiction:

Improvesignal line areaVSAvoidluminance uniformity

Core Design Contradiction:

Area of stationary objectVSStability of the object's composition

Solution Approach 1:

The signal line is divided into multiple segments: a first signal line portion in the peripheral region and a second signal line portion in the light-emitting region. This segmentation allows each portion to be optimized independently for its specific functional requirements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the signal line are designed with different widths according to their local requirements. The first portion in the peripheral region has a narrower width to reduce frame size, while the second portion in the light-emitting region has a wider width to maintain low resistance and voltage drop.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12266642B2Light-emitting substrate, backlight, display device

Publication Date: 2025.04.01 HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD

AI summary

The present disclosure provides a light-emitting substrate, a backlight and a display device. The light-emitting substrate includes a light-emitting region and a peripheral region surrounding the light-emitting region. The peripheral region includes a first area, the first area is located between a first side of the light-emitting substrate and the light-emitting region, the light-emitting substrate further includes a first signal line, the first signal line includes at least one selected from a group consisting of a first portion and a second portion, the first portion of the first signal line extends along a first direction in the first area, the second portion of the first signal line extends into the light-emitting region, the first portion and the second portion of the first signal line are connected when the first signal line includes the first portion and the second portion.