Polarization Member with Light-Absorbing Dye for Display Panel Protection

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Solution Overview

Problem

Display devices face degradation due to ultraviolet light and visible light, leading to pixel shrinkage and changes in color temperature, which existing technologies fail to adequately address.

Innovation Solution

A display device incorporating a polarization member with functional layers that include light absorbing dyes, specifically designed to absorb light in the wavelength range of 380 nm to 450 nm, reducing the impact of ultraviolet and visible light on the display panel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional polarizer is used without additional functional layers, then the device structure remains simple, but the display panel degrades due to ultraviolet and visible light exposure

Engineering Contradiction:

Improvedisplay panel durabilityVSAvoidpolarization member structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple functional layers (protective film, adhesive layer, and light-absorbing dye layer) with the polarizer to form an integrated polarization member. This merging approach provides UV and visible light protection while maintaining structural efficiency and avoiding the need for separate protective components.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The polarization member uses composite material structure consisting of the polarizer base material combined with functional layers containing light-absorbing dyes. This composite structure enables simultaneous achievement of polarization function, UV blocking, and visible light filtering without compromising the base polarizer performance.

Inventive Principle:

Principle #40Composite materials

2Manufacturing precision

If light-absorbing dyes are added to block ultraviolet and visible light, then pixel shrinkage is reduced and color temperature stability is improved, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvepixel dimensional stabilityVSAvoidpolarization member fabrication

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The light-absorbing dye is incorporated into the adhesive layer during the adhesive layer formation process, before the final assembly of the display device. This preliminary incorporation ensures uniform distribution of the dye and prevents pixel shrinkage and color temperature changes from the outset, avoiding the need for subsequent corrective manufacturing steps.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The adhesive layer serves multiple functions: it provides adhesion between the polarizer and other components, and simultaneously acts as a light-absorbing layer containing the dye to block harmful UV and visible light. This multi-functionality reduces the need for additional separate layers and simplifies the overall manufacturing process despite the added functionality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If the first adhesive layer includes the first light absorbing dye, then light transmittance in the 380-450 nm range is reduced, but the adhesive layer's primary bonding function may be compromised

Engineering Contradiction:

Improvelight absorption in 380-450 nm rangeVSAvoidadhesive bonding strength

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The light-absorbing dye is concentrated in the adhesive layer, creating a localized functional region that specifically addresses light absorption needs without affecting the overall structural integrity. The dye is distributed uniformly within the adhesive matrix, ensuring that the adhesive bonding function is maintained while providing targeted UV and visible light protection at the polarization member interface.

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 minimizes pixel shrinkage and maintains color temperature stability by blocking harmful light, thereby enhancing the reliability and brightness of the display device.

Implementation Method 1

at least one of the plurality of functional layers including a first light absorbing dye that absorbs light having a wavelength range of greater than 380 nm and equal to or less than 450 nm

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentEP3239747B1Polarization member and display device including the same

Publication Date: 2023.01.18 SAMSUNG DISPLAY CO LTD

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AI summary

Provided is a display device including a display panel and a polarization member on the display panel, wherein the polarization member includes a polarizer, and a plurality of functional layers on at least one surface of the polarizer, wherein at least one of the plurality of functional layers includes a first light absorbing dye that absorbs light having a wavelength range of greater than 380 nm and equal to or less than 450 nm.