OLED Night Vision Display with Quad-Pixel Segmentation

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Solution Overview

Problem

OLED displays face challenges in transitioning between day and night modes for night vision compatibility without compromising color gamut or requiring expensive Night Vision filter glass, as conventional backlight adjustments used in LCDs are not applicable.

Innovation Solution

A quad-pixel arrangement with subpixels of red, green, blue, and night-vision colors is implemented, allowing the display to selectively use different subpixels for day and night modes, eliminating the need for additional night vision filters and maintaining color integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional backlight adjustments are used in OLED displays for night vision compatibility, then night vision compatibility is improved, but color gamut and display quality deteriorate

Engineering Contradiction:
Improvenight vision compatibilityVSAvoidcolor gamut
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The display is divided into multiple pixel types (day pixels and night pixels) with different emission characteristics. Day pixels use standard RGB subpixels for color display, while night pixels use a different emission spectrum suitable for night vision compatibility. This segmentation allows the display to show different content through different pixel types depending on lighting conditions.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The display dynamically switches between day mode and night mode operation based on ambient light conditions. A detector monitors ambient light levels and controls the processor to activate appropriate pixel types accordingly. This dynamic adaptation allows the display to maintain optimal performance for both color fidelity in daylight and night vision compatibility in low-light conditions.

Inventive Principle:
Principle #15Dynamics

2Adaptability or versatility

If Night Vision filter glass is added to OLED displays, then night vision compatibility is improved, but device complexity and cost increase

Engineering Contradiction:
Improvenight vision compatibilityVSAvoiddisplay structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The night vision compatibility function is extracted from a separate filter layer and integrated directly into the OLED pixel structure itself. By incorporating night pixels with appropriate emission characteristics directly into the display, the need for external filter glass is eliminated, simplifying the overall device structure while maintaining night vision compatibility.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The OLED display is designed to perform multiple functions through its pixel structure. The same display hardware can operate in both standard color display mode (using day pixels) and night vision compatible mode (using night pixels), eliminating the need for separate filter components and enabling a single device to serve multiple operational requirements.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If Night Vision filter glass is added to OLED displays, then night vision compatibility is improved, but manufacturing cost increases

Engineering Contradiction:
Improvenight vision compatibilityVSAvoidmanufacturing cost
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The expensive night vision filter glass component is removed from the system entirely. Instead, night vision compatibility is achieved through specially designed night pixels that can be manufactured using standard OLED fabrication processes, significantly reducing material and manufacturing costs while maintaining the desired functionality.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs standard OLED materials and fabrication techniques to create night pixels, replacing the need for expensive specialized filter glass. This approach uses cost-effective, readily available materials and processes that are already established in OLED manufacturing, thereby reducing overall production costs.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

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

Enables OLED displays to seamlessly switch between day and night modes without sacrificing color quality or requiring expensive filters, ensuring compatibility with night vision devices while maintaining color gamut and reducing costs.

Implementation Method 1

OLEDs are light-emitting diodes (LED) that emit with an emissive electro-luminescent layer composed of a film comprising an organic compound. The organic compound emits light in response to an electro-current stimuli running across the film.

Methodology Applied
Scientific EffectElectro-luminescence: Electroluminescence

Data Source

PatentUS10580353B2Night vision compatible display
Publication Date: 2020.03.03 L3 TECHNOLOGIES INC
  • US10580353B2 patent drawing
  • US10580353B2 patent drawing
  • US10580353B2 patent drawing

AI summary

The disclosure relates to an emissive display configured to operate in a day mode and a night mode. The emissive display comprises a day pixel configured to operate in the day mode. The emissive display also comprises a night pixel configured to operate in the night mode, wherein the night pixel is not operational in the day mode. The emissive display also comprises a common pixel configured to operate in both the day mode and the night mode. The emissive display also comprises a detector configured to selectively change an operating mode of the display between the day mode and the night mode based on a detected indication.