Polarizing Plate Recess Structure for Under-Display Light Transmittance

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Solution Overview

Problem

Existing electronic devices face challenges in achieving high light transmittance in display areas where a polarizing plate overlaps with electronic modules, such as cameras or sensors, leading to reduced display area visibility.

Innovation Solution

Incorporating a non-polarizing area in the polarizing plate by forming recesses using laser irradiation and a neutral solution to remove light absorbing agents, resulting in a transmissive area with improved light transmittance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a polarizing plate is applied to the display area, then polarization function is provided, but light transmittance is reduced

Engineering Contradiction:

Improvepolarization functionVSAvoidlight transmittance

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The polarizing plate is designed with different optical properties in different regions: the first area (overlapping the electronic module) has removed light-absorbing agents to provide high light transmittance, while the second area (surrounding the first area) retains the polarizing function. This local differentiation resolves the contradiction by providing both high transmittance where needed and polarization where required.

Inventive Principle:

Principle #3Local quality

2Area of stationary object

If the display area is expanded to overlap electronic modules, then usable display space is increased, but light transmittance is reduced

Engineering Contradiction:

Improvedisplay areaVSAvoidlight transmittance

Core Design Contradiction:

Area of stationary objectVSIllumination intensity

Solution Approach 1:

The solution enables the display area to be expanded into the region overlapping the electronic module by creating a first area with high light transmittance (removed light-absorbing agents) specifically in the overlapping region, while maintaining the polarizing structure in surrounding areas. This allows the display to occupy more space without sacrificing visibility in the critical overlapping zone.

Inventive Principle:

Principle #3Local quality

3Illumination intensity

If light absorbing agents are removed from the polarizer layer, then light transmittance is improved, but polarization function is lost

Engineering Contradiction:

Improvelight transmittanceVSAvoidpolarization function

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The polarizing plate is segmented into two functional regions: a first area where light-absorbing agents are removed to maximize light transmittance, and a second area where the polarizing structure is preserved to maintain polarization function. This segmentation allows each region to optimize its specific function without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different optical properties are applied to different regions of the polarizing plate. The first area has high transmittance due to removed light-absorbing agents, while the second area maintains the full polarizing structure. This local quality differentiation resolves the contradiction by providing both high transmittance and polarization function in appropriate locations.

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

Enhances light transmittance in the display area, allowing for wider display visibility while maintaining polarization in other areas, thus expanding the usable display space.

Implementation Method 1

irradiating with laser light to form a transmissive area having a recess and a polarizing area surrounding the transmissive area

Methodology Applied

Scientific EffectLaser ablation: Laser Ablation

Implementation Method 2

irradiating the preliminary polarizing plate with laser light to form a polarizing plate including a transmissive area having at least one recess

Methodology Applied

Scientific EffectPhotodissociation: Photodissociation

Implementation Method 3

providing a neutral solution to the preliminary polarizing plate irradiated with the laser light to form a polarizing plate including a transmissive area having at least one recess

Methodology Applied

Scientific EffectSolvation: Solvation

Data Source

PatentUS12554054B2Electronic device and manufacturing method of the same

Publication Date: 2026.02.17 SAMSUNG DISPLAY CO LTD

AI summary

An electronic device includes an electronic module, a display panel including a first area overlapping the electronic module and a second area surrounding at least a portion of the first area, and a polarizing plate which is disposed on the display panel and includes a polarizer layer in an uppermost layer, wherein the polarizing plate includes a transmissive area which overlaps the first area and in which at least one recess is defined, and a polarizing area overlapping the second area, so that an electronic device may be provided which has improved light transmittance in a portion overlapping an electronic module.