Display Panel Thermal Barrier Layout for Organic Film Isolation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing display panels face challenges in achieving high-resolution display quality while minimizing damage to light-emitting layers and common layers, and effectively disconnecting organic films in neighboring light-emitting regions.

Innovation Solution

A display panel design that includes a base substrate, a circuit element layer, a pixel defining layer with a light-emitting opening, a light-emitting element with a functional layer between electrodes, a metal pattern layer, and a low thermal conductive layer. The low thermal conductive layer, made of polymer-type amorphous carbon film, is used to prevent heat transfer from the metal pattern layer, which generates heat through Joule heating, thereby minimizing damage to the organic layers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a metal pattern layer is used to disconnect organic films in neighboring light-emitting regions, then disconnection effectiveness is improved, but heat transfer to organic layers increases causing damage

Engineering Contradiction:

Improvedisconnection effectivenessVSAvoidheat damage to organic layers

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A low thermal conductive layer is introduced as an intermediary between the metal pattern layer and the organic functional layers. This intermediary layer blocks heat transfer from the metal pattern to the organic layers while allowing the metal pattern to effectively disconnect the organic films in neighboring light-emitting regions. The low thermal conductive layer acts as a thermal barrier that prevents harmful heat effects on the organic materials.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent employs a composite structure combining the metal pattern layer with the low thermal conductive layer. This composite material approach allows the structure to simultaneously achieve electrical disconnection function (from metal pattern) and thermal insulation function (from low thermal conductive layer), resolving the contradiction between disconnection effectiveness and heat damage prevention.

Inventive Principle:

Principle #40Composite materials

2Productivity

If the light-emitting layer is extended to the peripheral region to improve utilization efficiency, then productivity is improved, but the risk of short circuit between adjacent light-emitting elements increases

Engineering Contradiction:

Improveutilization efficiencyVSAvoidshort circuit risk

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent divides the light-emitting layer into separate regions corresponding to individual light-emitting elements, preventing continuous extension to the peripheral region. This segmentation approach allows each light-emitting element to be independently controlled and isolated, eliminating the short circuit risk that would arise from continuous light-emitting material extending to the periphery, while still maintaining high utilization efficiency through optimized element arrangement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different material properties to different regions: the light-emitting layer is present in the active light-emitting regions but absent or disconnected in the peripheral regions. This local quality differentiation allows the structure to maximize light-emitting area where needed while preventing short circuits in the peripheral isolation regions, thus resolving the contradiction between productivity and reliability.

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution effectively improves display quality by preventing damage to the light-emitting layers and common layers, and ensures high-resolution performance by disconnecting organic films between light-emitting regions, thus preventing leakage current and color mixing.

Implementation Method 1

a low thermal conductive layer disposed between the pixel defining layer and the metal pattern layer

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 2

the metal pattern layer, which generates heat through Joule heating

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS20250081830A1Display panel and manufacturing method of the same

Publication Date: 2025.03.06 SAMSUNG DISPLAY CO LTD

AI summary

Provided is a display panel including a base substrate, a circuit element layer disposed on the base substrate, a pixel defining layer disposed on the circuit element layer and including a light-emitting opening, a light-emitting element disposed on the circuit element layer and including a first electrode, a second electrode facing the first electrode, and a functional layer disposed between the first electrode and the second electrode, a metal pattern layer disposed on the pixel defining layer, and a low thermal conductive layer disposed between the pixel defining layer and the metal pattern layer, thereby having excellent display quality.