Polarizer Layer Transmittance via Laser Extraction

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Solution Overview

Problem

Existing electronic devices face challenges in increasing the transmittance of polarizing plates to allow camera modules to overlap with the display area without compromising display quality or increasing bezel size.

Innovation Solution

The method involves irradiating a laser beam onto a portion of the polarizer layer and applying a neutral solution to detach and extract the light-absorbing material, thereby eliminating polarization and increasing light transmittance in specific areas of the display panel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the transmittance of the polarizing plate is increased to allow camera modules to overlap with the display area, then the display area is expanded and bezel size is reduced, but the polarization function of the polarizer is compromised

Engineering Contradiction:

Improvedisplay areaVSAvoidpolarization function

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The polarizer layer is divided into two functional regions: a first region that maintains polarization properties for display quality and a second region that has had its light-absorbing material removed to increase transmittance for camera module overlap. This spatial segmentation allows each region to fulfill its specific function without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the polarizer layer are given different properties: the first region retains the light-absorbing material for polarization function, while the second region has the light-absorbing material removed for enhanced transmittance. This local differentiation resolves the contradiction by allowing the polarizer to simultaneously maintain polarization capability and provide increased light transmission where needed.

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If the light-absorbing material is removed from the polarizer layer to increase transmittance, then light transmittance is improved, but the polarization capability is reduced

Engineering Contradiction:

Improvelight transmittanceVSAvoidpolarization capability

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The polarizer layer is segmented into regions with different light-absorbing material content. The first region maintains sufficient light-absorbing material for polarization, while the second region has reduced light-absorbing material for enhanced transmittance. This segmentation allows the system to achieve both polarization capability and improved light transmittance simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The light-absorbing material is distributed non-uniformly across the polarizer layer, with different concentrations in different regions. This local quality variation enables the first region to maintain polarization function while the second region provides enhanced transmittance, resolving the contradiction between these two requirements.

Inventive Principle:

Principle #3Local quality

3Illumination intensity

If a conventional method is used to increase transmittance by removing the polarizer layer, then light transmittance is improved, but the display quality and structural integrity are compromised

Engineering Contradiction:

Improvelight transmittanceVSAvoiddisplay quality

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

Instead of removing the entire polarizer layer, only the light-absorbing material is extracted from the second region while maintaining the polarizer layer structure and the first region intact. This selective extraction increases transmittance where needed while preserving display quality and structural integrity through the remaining polarizer layer.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The polarizer layer maintains its structural integrity and display quality in the first region while having enhanced transmittance properties in the second region through selective light-absorbing material removal. This local differentiation allows the system to achieve improved light transmittance without compromising overall display quality or structural strength.

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

This approach enhances light transmittance in areas overlapping electronic modules, such as cameras, without physically removing parts of the polarizer, thus allowing for a wider display area and improved light sensitivity.

Implementation Method 1

irradiating a laser beam onto a portion of the polarizer layer

Methodology Applied

Scientific EffectLaser irradiation: Laser

Implementation Method 2

detaching the light-absorbing material

Methodology Applied

Scientific EffectPhotodissociation: Photodissociation

Implementation Method 3

providing a substantially neutral solution having a temperature from about 5° C. to about 40° C. onto the portion of the polarizer layer irradiated with the laser beam

Methodology Applied

Scientific EffectDissolution: Solvation

Data Source

PatentUS12298548B2Electronic device and method of manufacturing the same

Publication Date: 2025.05.13 SAMSUNG DISPLAY CO LTD

AI summary

An electronic device includes a display panel that has a first area and a second area; a polarizer including a polarizer layer that has a polarization area and a transmission area, a protection layer disposed under the polarizer layer, and a plurality of retarders disposed under the protection layer for retarding a phase of light incident thereon.