Color Conversion Panel With Reflection Bank In Transmission Bank Opening

Solution Overview

Problem

Existing display devices with color conversion panels face challenges in maintaining high light efficiency and reducing manufacturing costs and time, particularly due to issues with liquid repellency and increased mask processes for forming reflective layers.

Innovation Solution

The placement of the reflection bank within the opening of the transmission bank in the color conversion panel design enhances light efficiency, and a method involving a photoresist layer and dry etching without a photolithography process reduces manufacturing costs and time by patterning the reflective layer directly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If a reflective layer is formed on the bank to prevent light absorption, then light efficiency is improved, but liquid repellency at the upper portion of the bank decreases and manufacturing complexity increases

Engineering Contradiction:

Improvelight efficiencyVSAvoidmask processes

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent merges the reflective layer formation with the existing bank structure by forming the reflective layer only in the opening region of the transmission bank, not on the bank itself. This integration approach maintains light efficiency while avoiding the need for additional mask processes that would increase manufacturing complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The reflective layer is applied selectively only in specific regions (the opening of the transmission bank) rather than uniformly across the entire bank structure. This localized application optimizes light efficiency where needed while preserving liquid repellency properties in other critical areas and reducing manufacturing steps.

Inventive Principle:

Principle #3Local quality

2Use of energy by moving object

If a reflective layer is formed on the bank to prevent light absorption, then light efficiency is improved, but liquid repellency at the upper portion of the bank decreases

Engineering Contradiction:

Improvelight efficiencyVSAvoidliquid repellency

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The reflective layer is applied selectively only in specific regions (the opening of the transmission bank) rather than uniformly across the entire bank structure. This localized application optimizes light efficiency where needed while preserving liquid repellency properties in other critical areas.

Inventive Principle:

Principle #3Local quality

3Use of energy by moving object

If additional mask processes are used to form the reflective layer, then light efficiency is improved, but manufacturing time and cost increase

Engineering Contradiction:

Improvelight efficiencyVSAvoidmanufacturing time

Core Design Contradiction:

Use of energy by moving objectVSProductivity

Solution Approach 1:

The patent merges the reflective layer formation with the existing bank structure by forming the reflective layer only in the opening region of the transmission bank, not on the bank itself. This integration approach maintains light efficiency while avoiding the need for additional mask processes that would increase manufacturing complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bank structure is designed in advance with an opening region that is specifically configured to receive the reflective layer. This preliminary design eliminates the need for subsequent mask processes to define the reflective layer pattern, thereby reducing manufacturing time and cost.

Inventive Principle:

Principle #10Preliminary action

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

This configuration improves light efficiency and reduces manufacturing costs and time by ensuring effective light reflection and transmission while simplifying the manufacturing process.

Implementation Method 1

a reflective layer may be disposed on a side of the bank to prevent or reduce the absorption of light by the bank

Methodology Applied

Scientific EffectLight reflection: Reflection

Implementation Method 2

a method involving a photoresist layer and dry etching without a photolithography process reduces manufacturing costs and time by patterning the reflective layer directly

Methodology Applied

Scientific EffectDry etching:

Data Source

PatentEP3958026B1Color conversion panel, method of manufacturing the same, and display device including the same

Publication Date: 2024.09.25 SAMSUNG DISPLAY CO LTD

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AI summary

Disclosed is a color conversion panel which may include a first pixel area, a second pixel area, a third pixel area, and a non-pixel area positioned between the first pixel area, the second pixel area, and the third pixel area; a substrate; a light blocking layer in a non-pixel area on a substrate, a color filter layer including a first color filter, a second color filter, and a third color filter; a color conversion layer including a first color conversion pattern on the first color filter, a second color conversion pattern on the second color filter, and a light transmission pattern on third color filter; a transmission bank between the first color conversion pattern, the second color conversion pattern, and the light transmission pattern; an opening in the transmission bank; and a reflection bank in the opening of the transmission bank.