Addressable Array LED Chip Reduces Interconnections

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Solution Overview

Problem

The manufacturing of Inorganic Light Emitting Diode (ILED) displays faces challenges in achieving high yield due to the need for redundancy in ILED chips and interconnections, which increases complexity and cost, and can result in unwanted optical interference.

Innovation Solution

The design eliminates the need for two individual ILED chips at each display sub-pixel by using Addressable Array Chips with multiple light emitting elements that share a common cathode, reducing the number of connections and chips required while maintaining redundancy, and incorporating optical films to direct light efficiently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If two individual ILED chips are placed at each display sub-pixel for redundancy, then device failure risk is reduced, but the number of connections and manufacturing complexity increase significantly

Engineering Contradiction:

Improvedevice failure riskVSAvoidnumber of connections

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges multiple light emitting elements onto a single ILED chip, where one chip contains multiple elements that can be independently controlled. This consolidation reduces the total number of chips and connections required while maintaining redundancy through the multiple elements on each chip, directly resolving the contradiction between reliability and device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The ILED chip is designed to perform multiple functions: it provides primary light emitting elements for normal operation and includes additional redundant elements on the same chip that can take over if primary elements fail. This multi-functionality allows a single chip to replace what would traditionally require multiple separate chips, reducing connection complexity while maintaining reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If two individual ILED chips are placed at each display sub-pixel for redundancy, then device failure risk is reduced, but manufacturing cost increases

Engineering Contradiction:

Improvedevice failure riskVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

By combining multiple light emitting elements onto a single ILED chip, the patent reduces the total component count that must be manufactured, procured, and assembled. This consolidation directly lowers manufacturing costs while maintaining the redundancy needed for reliability, as fewer individual chips need to be produced and handled during assembly.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent segments the ILED chip into multiple independently controllable light emitting elements, allowing selective activation of primary and redundant elements. This segmentation enables efficient use of resources during manufacturing and operation, reducing waste and lowering overall manufacturing costs while maintaining reliability through the segmented redundant elements.

Inventive Principle:

Principle #1Segmentation

3Reliability

If multiple ILED chips are placed in close proximity for redundancy, then device failure risk is reduced, but optical interference and unwanted reflections increase

Engineering Contradiction:

Improvedevice failure riskVSAvoidoptical interference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent merges multiple light emitting elements onto a single chip substrate, ensuring they are precisely positioned and optically isolated from each other. This controlled integration eliminates the optical interference and unwanted reflections that occur when multiple separate chips are placed in close proximity, while still providing redundancy through the multiple elements on the unified chip.

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

This approach enhances manufacturability, simplifies electronics, and reduces the likelihood of device failure, while minimizing optical interference, thereby improving the performance and cost-effectiveness of ILED displays.

Implementation Method 1

each LED chip comprising a plurality of light emitting elements; wherein each LED chip is arranged such that a first light emitting element is configured to illuminate a sub-pixel, and a second light emitting element is configured to illuminate a sub-pixel using substantially the same wavelength of light as the first light emitting element

Methodology Applied

Scientific EffectLight Emitting Diode: Light Emitting Diode

Data Source

PatentUS11386831B2Display, LED chip therefor, pixel therefor, controlling method therefor, computer program therefor

Publication Date: 2022.07.12 META PLATFORMS INC

AI summary

A display (100) comprising a plurality of LED chips (604), each LED chip (604) comprising a plurality of light emitting elements (606a-c). Each LED chip (604) is arranged such that a first light emitting element (606a) is configured to illuminate a sub-pixel, and a second light emitting element (606b) is configured to illuminate a sub-pixel using substantially the same wavelength of light as the first light emitting element. There is also described an LED chip, a display pixel, a controlling method, a computer device and a computer program for a display.