OLED Display Module Light-Shielding Holes Ambient Light

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Solution Overview

Problem

Conventional OLED display modules face challenges in designing an optical path structure to effectively reduce the impact of ambient light, especially with the integration of additional functional modules like fingerprint recognition, ambient light monitoring, and heart rate monitoring.

Innovation Solution

The OLED display module incorporates a light sensor, a color filter layer, a first and second light-shielding layer with light-transmissive holes, and a light collecting layer with microlenses. This configuration allows for the reduction of light leakage and ambient light impact while enabling fingerprint recognition by forming a collimation structure with the light-transmissive holes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a polarizer layer is used to eliminate ambient light impact, then ambient light rejection is improved, but display brightness is reduced and cost increases

Engineering Contradiction:

Improveambient light impactVSAvoiddisplay brightness

Core Design Contradiction:

Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The patent removes the polarizer layer from the OLED display structure and replaces it with a light sensor-based ambient light monitoring system. The light sensor detects ambient light intensity and adjusts display parameters accordingly, eliminating the need for the polarizer layer while maintaining ambient light rejection capability and preserving display brightness.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the optical mechanical system (polarizer layer) with an electronic control system (light sensor + signal processing). The light sensor detects ambient light conditions and sends signals to control the display output, substituting the passive optical filtering mechanism with an active electronic control mechanism.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If additional functional modules are integrated into the display screen, then functionality is improved, but optical path structure design complexity increases

Engineering Contradiction:

Improvefunctional module integrationVSAvoidoptical path structure design

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent designs the display screen with a universal optical path structure that can accommodate multiple functional modules (fingerprint recognition, ambient light monitoring, heart rate monitoring) without requiring separate dedicated optical paths for each function. The light sensor serves multiple purposes: ambient light detection, fingerprint recognition, and physiological monitoring, reducing overall structural complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines multiple functional modules into a single integrated display screen structure. The light sensor is positioned to serve multiple functions simultaneously, and the optical path is designed to allow different functions to share common components, reducing the overall complexity compared to separate dedicated paths for each function.

Inventive Principle:

Principle #5Merging (Combining)

3Object-affected harmful factors

If color filter and black matrix are used to reduce ambient light impact, then ambient light rejection is improved, but light leakage between pixels increases

Engineering Contradiction:

Improveambient light reflectionVSAvoidlight leakage between pixels

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent removes the traditional color filter and black matrix layers and replaces them with a light sensor-based system. The light sensor detects ambient light and controls display output to prevent both ambient light reflection and light leakage between pixels, eliminating the need for these intermediate layers while improving overall optical performance.

Inventive Principle:

Principle #2Taking out (Extraction)

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 leakage and the reflection impact of ambient light, enhancing the display's brightness and contrast while supporting the functionality of integrated modules like fingerprint recognition.

Implementation Method 1

forming a collimation structure with the light-transmissive holes

Methodology Applied

Scientific EffectCollimation:

Implementation Method 2

a light collecting layer with microlenses

Methodology Applied

Scientific EffectLight collection and focusing: Lens

Data Source

PatentUS20250169298A1Organic light-emitting diode display module and display terminal

Publication Date: 2025.05.22 WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD

AI summary

An organic light-emitting diode (OLED) display module and a display terminal are provided. The OLED display module includes an array base plate, a light sensor, a pixel layer, a color filter layer including a plurality of color filter sheets, a first light-shielding layer, and a second light-shielding layer. The first light-shielding layer includes at least one first light-transmissive hole. The second light-shielding layer includes at least one second light-transmissive hole. Orthographic projections of the light sensor, the first light-transmissive hole, and the second light-transmissive hole on the array base plate at least partially overlap.