OLED Display Module Polarizing Sub-Area for Reflection Control

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Solution Overview

Problem

Existing OLED display apparatuses face challenges in achieving a full-screen design due to reflection issues from internal structures, which affect display quality and power consumption, and incorporating optical devices like image collectors is difficult due to the black matrix blocking light paths.

Innovation Solution

A display module with a main and sub display area, featuring a first color filter layer in the main area and a polarizing layer in the sub area, reduces reflection by filtering and polarizing external light, ensuring uniform reflectivity and improved light transmittance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a black matrix is used to block light paths for optical devices, then light blocking is improved, but light transmittance deteriorates

Engineering Contradiction:

Improvelight blockingVSAvoidlight transmittance

Core Design Contradiction:

Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The display area is divided into a main display area with a first color filter layer and a sub display area with a polarizing layer. This segmentation allows different optical functions in different regions, enabling the sub display area to transmit light to optical devices while the main display area maintains display functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different optical properties are applied to different regions: the main display area uses a color filter layer for color display, while the sub display area uses a polarizing layer for light transmission to optical devices. This local differentiation resolves the contradiction between light blocking and light transmittance.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If internal structures are present in the display panel, then device functionality is improved, but reflection increases

Engineering Contradiction:

Improvedevice functionalityVSAvoidreflection

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The polarizing layer is applied specifically in the sub display area to address reflection issues locally without affecting the overall device functionality. This targeted approach reduces reflection from internal structures while maintaining display performance in the main area.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The polarizing layer converts the harmful reflection effect into a beneficial function by controlling the polarization state of light, thereby reducing unwanted reflections while enabling light transmission to optical devices in the sub display area.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Manufacturing precision

If reflectivity is reduced to improve display quality, then display quality is improved, but power consumption may increase

Engineering Contradiction:

Improvedisplay qualityVSAvoidpower consumption

Core Design Contradiction:

Manufacturing precisionVSUse of energy by moving object

Solution Approach 1:

The polarizing layer is selectively applied in the sub display area rather than the entire display panel. This localized approach reduces reflection and improves display quality in specific regions while minimizing the overall impact on power consumption compared to a full-panel solution.

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 enhances display quality by reducing overall reflectivity, matching reflectivity across areas, and optimizing power consumption by minimizing unnecessary light reflection, thus supporting the integration of optical devices like image collectors.

Implementation Method 1

The polarizing layer is configured to change a polarization direction of at least part of external light entering an inside of the display panel

Methodology Applied

Scientific EffectPolarization: Polarisation

Implementation Method 2

a first color filter layer disposed at a light exit side of the display panel and located in the main display area

Methodology Applied

Scientific EffectOptical filtering: Filter (optical)

Data Source

PatentUS12538688B2Display module and method for manufacturing the same, and display apparatus

Publication Date: 2026.01.27 CHENGDU BOE OPTOELECTRONICS TECH CO LTD

AI summary

A display module has a display area. The display area includes a main display area and a sub display area. The display module includes: a display panel, a first color filter layer disposed at a light exit side of the display panel and located in the main display area, and a polarizing layer disposed at the light exit side of the display panel and located in the sub display area. The polarizing layer serves to change a polarization direction of at least part of external light entering an inside of the display panel, so as to prevent the at least part of the external light entering the inside of the display panel from exiting from the light exit side of the display panel.