RGB-IR LED Package Reverse-Bias Sensor Integration

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Solution Overview

Problem

Existing LED displays require separate sensor components for user interaction, increasing complexity and cost, and limiting their ability to provide interactive high-definition images without the need for physical contact.

Innovation Solution

Incorporating RGB-IR LED packages where the IR LED can be reverse-biased to function as a sensor, allowing the same LED package to both emit and detect infrared light, eliminating the need for dedicated sensors and enabling interactive video walls and floors with seamless user interface integration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If separate sensor components are added to LED displays for user interaction, then the display can detect user presence and gestures, but the device complexity and manufacturing cost increase

Engineering Contradiction:

Improveinteractive capabilityVSAvoidcomponent quantity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent makes the LED packages multi-functional by enabling them to operate both as light emitters and as sensors. The same LED package that emits light can also detect light signals, eliminating the need for separate sensor components. This is achieved through circuit configuration that allows the LED to function in both forward-biased (emitter) and reverse-biased (sensor) modes, directly resolving the technical contradiction by reducing component quantity while maintaining interactive capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If separate sensor components are added to LED displays for user interaction, then the display can detect user presence and gestures, but the manufacturing cost increases

Engineering Contradiction:

Improveinteractive capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If the same LED package functions as both emitter and sensor, then component quantity is reduced, but the LED must be configured in different bias modes

Engineering Contradiction:

Improvecomponent quantityVSAvoidconfiguration flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic configuration of LED packages, where each LED package can be electrically switched between forward-biased mode (for light emission) and reverse-biased mode (for sensing). This dynamic reconfiguration capability allows the system to adapt its functionality based on operational requirements, resolving the contradiction by providing configuration flexibility through electrical control while maintaining reduced component quantity.

Inventive Principle:

Principle #15Dynamics

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

This solution reduces manufacturing complexity and cost by integrating user input detection into the display, allowing for interactive electronic displays that can detect user presence and gestures without physical contact, enhancing sanitary conditions and enabling various interactive applications.

Implementation Method 1

An LED display, or light emitting diode display, is a flat panel electronic display that utilizes light emitting diodes to enable the video display

Methodology Applied

Scientific EffectLight Emitting Diode: Light Emitting Diode

Implementation Method 2

Incorporating RGB-IR LED packages where the IR LED can be reverse-biased to function as a sensor, allowing the same LED package to both emit and detect infrared light

Methodology Applied

Scientific EffectPhotoelectric Effect: Photoelectric Effect

Data Source

PatentUS11438991B2Light emitting diode package and electronic display

Publication Date: 2022.09.06 BRIGHTLOGIC INC

AI summary

Disclosed embodiments provide an LED package and electronic display. An LED package can include an LED that emits red, green, blue and IR (infrared), where the IR portion is configured as either an emitter or (reversed biased) as a receiver. An electronic display includes multiple LED packages with the IR portions configured in a combination of transmitters and receivers. Thus, disclosed embodiments enable electronic displays that can serve as interactive video walls and floors that present a high-definition image along with interactive capabilities. Thus, disclosed embodiments serve to reduce cost and complexity in manufacture and deployment of such displays.