Integrated LED Control Circuit for Compact Individual Addressing

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Solution Overview

Problem

There is a need for a cost-effective and compact packaging solution for LEDs and associated control devices that allows for efficient control and spacing of multiple LEDs in a compact design.

Innovation Solution

The solution involves integrating LED packages with individual control circuits, where each LED is bonded over a respective control circuit, with control lines that are thin and only carry gate current, allowing for a series or parallel configuration of LEDs, enabling individual control and compact arrangement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If LEDs are mounted on separate substrates with control circuitry, then individual LED control is achieved, but lateral space requirements increase

Engineering Contradiction:

ImproveIndividual LED controlVSAvoidLateral space

Core Design Contradiction:

Ease of operationVSArea of stationary object

Solution Approach 1:

The patent combines multiple previously separate components (LED die, control circuitry, substrate) into a single integrated LED package. The control circuitry is integrated directly onto the same substrate as the LED die, eliminating the need for separate substrates and reducing lateral space while maintaining individual LED control capability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements a nested structure where the LED die is mounted on a substrate that contains embedded control circuitry. The control circuitry is nested within the same package structure as the LED, with control lines routed through the substrate to reach the LED terminals, creating a compact hierarchical arrangement

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If multiple discrete LED packages with control devices are used, then individual LED control is possible, but device complexity increases

Engineering Contradiction:

ImproveIndividual LED controlVSAvoidPackaging complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent merges the LED die and control circuitry into a single integrated package, reducing the number of discrete components from multiple separate packages to one unified device. This integration simplifies the overall system architecture while preserving individual LED control functionality

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The substrate serves multiple functions simultaneously: it acts as the mechanical support for the LED die, provides electrical interconnection between the LED terminals and control circuitry, and integrates the control circuitry itself. This multi-functionality reduces the need for separate components and simplifies the overall device structure

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP2883421B1LED circuit

Publication Date: 2019.10.02 LUMILEDS HLDG BV

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AI summary

An LED circuit (40) comprises integrated circuit LEDs (50) each mounted over a respective LED control circuit (42). The LED control circuits (42) are electrically connected together to by the integrated circuit to define a string of LED control circuits, each having at least one control line (44) leading to the circuit. This provides a compact circuit of multiple LEDs with individual control of the LEDs.