Display Device Grooves for Reduced Transmission-Area Diffraction

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Solution Overview

Problem

Existing display devices face challenges in reducing light diffraction through transmission areas, which affects image quality and signal integrity.

Innovation Solution

Incorporating grooves and lower metal patterns in the substrate to form closed line shapes symmetrically arranged around a central line, along with a thin film encapsulation layer that extends into these grooves, to minimize light diffraction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a transmission area is provided in the substrate for component mounting, then light transmission is enabled for optical components, but light diffraction occurs affecting image quality

Engineering Contradiction:

Improvelight transmissionVSAvoidlight diffraction

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The substrate is divided into a display area and a component area, with the transmission area specifically located in the component area. This segmentation allows light transmission functionality to be provided only where needed for optical components, while the display area maintains its optical characteristics for image display, thereby enabling light transmission while minimizing diffraction impact on image quality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The substrate is designed with different optical properties in different regions: the display area is optimized for image display with minimal diffraction, while the component area contains the transmission area with specific groove patterns that enable light transmission for optical components. This local differentiation allows each region to perform its specific function optimally

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If grooves are formed in the substrate to reduce light diffraction, then image quality is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvelight diffractionVSAvoidsubstrate fabrication

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The grooves are formed in the substrate during the substrate fabrication process itself, before the display device is assembled. This preliminary action integrates the diffraction reduction feature into the substrate manufacturing, avoiding the need for additional post-processing steps and reducing overall manufacturing complexity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The grooves are designed with curved or circular patterns rather than straight lines, forming closed line shapes that are symmetrically disposed. This curved geometry is more effective at reducing light diffraction compared to linear patterns, while the symmetrical design provides manufacturing consistency and ease of fabrication

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Adaptability or versatility

If the transmission area is made larger to accommodate optical components, then component functionality is improved, but light diffraction increases

Engineering Contradiction:

Improvecomponent accommodationVSAvoidlight diffraction

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The transmission area is asymmetrically positioned within the component area, with grooves symmetrically disposed around a central line perpendicular to the substrate surface. This asymmetric placement allows the transmission area to be optimized for component accommodation while the symmetric groove pattern minimizes diffraction effects

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The grooves extend through the thickness of the substrate, creating a three-dimensional structure that addresses diffraction in multiple dimensions. This vertical extension of the groove pattern complements the horizontal transmission area design, providing comprehensive diffraction reduction while maintaining component accommodation capability

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 reduces light diffraction and improves light transmission efficiency, enhancing image quality and reducing signal distortion in display devices.

Implementation Method 1

In a display device, various functions related to a display device are being added while at the same time increasing a display area. Research into a display device having a region capable of performing various functions while also displaying images is being performed.

Methodology Applied

Scientific EffectDiffraction: Diffraction

Data Source

PatentUS20250248213A1Display device

Publication Date: 2025.07.31 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a substrate including a display area and a component area including a transmission area, and display elements disposed on the substrate. The substrate includes grooves corresponding to the transmission area of the component area.