OLED Light Emission Barrier for Narrow-Bezel Leakage Control

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Solution Overview

Problem

In information handling systems, particularly in portable displays with organic light-emitting diode (OLED) panels, light leakage occurs due to the absence of a light-blocking mechanism, which affects the active area and compromises user authentication and power management systems.

Innovation Solution

A light emission barrier, such as a light-blocking tape or edge-printed ink, is implemented to block undesired light emissions while allowing desired light to pass through, preventing light leakage by being strategically placed between the OLED panel and the imaging device's light source, effectively absorbing over 99% of incident energy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of stationary object

If narrow border widths are used in display devices, then the device dimensions are reduced and modernization is achieved, but light leakage occurs from imaging devices interfering with the active display area

Engineering Contradiction:

Improveborder widthVSAvoidlight leakage

Core Design Contradiction:

Length of stationary objectVSObject-affected harmful factors

Solution Approach 1:

A light emission barrier is introduced as an intermediary component between the imaging device and the active display area. This barrier selectively blocks stray light emissions from the imaging device while allowing the display content to pass through, thereby preventing light leakage without requiring increased border widths.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The light emission barrier is strategically positioned only in specific regions where light leakage occurs, rather than requiring a complete increase in overall border width. This localized approach blocks harmful light paths while maintaining narrow borders in other areas, preserving the modernized compact design.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If traditional light blocking components (tubes or Mylar strips) are used to prevent light leakage, then light interference is blocked, but the device dimensions and structural complexity increase

Engineering Contradiction:

Improvelight interferenceVSAvoiddevice dimensions

Core Design Contradiction:

Object-affected harmful factorsVSLength of stationary object

Solution Approach 1:

The light emission barrier is implemented as a thin film or flexible structure that can be integrated into the existing display architecture without adding significant thickness or bulk. This thin film approach blocks light interference while maintaining compact device dimensions, avoiding the need for bulky traditional components.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The light emission barrier is merged with existing display components or integrated directly into the display structure, eliminating the need for separate traditional light-blocking components like tubes or Mylar strips. This integration prevents light interference while avoiding additional structural complexity and increased dimensions.

Inventive Principle:

Principle #5Merging (Combining)

3Object-affected harmful factors

If traditional light blocking components are used, then light leakage is prevented, but the overall device structure becomes more complex

Engineering Contradiction:

Improvelight leakageVSAvoidstructural complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

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 light emission barrier significantly reduces light leakage, enhancing the display's performance by maintaining image quality and improving user authentication processes without mechanical interference.

Implementation Method 1

using materials with high optical density to absorb 99% of incident energy

Methodology Applied

Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Data Source

PatentUS20240023369A1Light emission barrier to prevent light leakage

Publication Date: 2024.01.18 DELL PROD LP

AI summary

A display includes an imaging device with a light source providing a first light emission and a second light emission, and an organic light-emitting diode panel proximate to the light source, wherein the first light emission leaks at an active area of the display device. A light emission barrier blocks the first light emission from leaking at the active area of the display while permitting the second light emission through the imaging device.