Single Driving Circuit for Independent LED Current Control

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Solution Overview

Problem

Existing lighting devices require multiple driving circuits to supply currents of different magnitudes to light-emitting elements, leading to increased mounting area and design challenges for compact and thin devices.

Innovation Solution

A lighting device with a single driving circuit that includes a current supply and separate current controllers for each light-emitting element, allowing for independent control of current magnitudes to multiple LED elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple driving circuits are used to supply currents of different magnitudes to light-emitting elements, then the lighting device can achieve better color gamut and display quality, but the mounting area increases and device compactness deteriorates

Engineering Contradiction:

Improvecolor gamutVSAvoidmounting area

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent merges multiple driving circuits into a single integrated driving circuit that can supply different current magnitudes to multiple light-emitting elements through separate current control circuits. This consolidation maintains the ability to drive multiple LEDs with different currents while reducing the overall mounting area by eliminating redundant circuit components and shared power supply structures.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single driving circuit is designed with multi-functionality, incorporating multiple current control circuits that can independently regulate current magnitudes for different light-emitting elements. This universal circuit structure replaces multiple specialized driving circuits, achieving the same functional outcomes with reduced spatial requirements.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple driving circuits are mounted on the lighting device, then currents of different magnitudes can be supplied to light-emitting elements, but the device complexity and design difficulty increase

Engineering Contradiction:

Improvecurrent control capabilityVSAvoiddriving circuit complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Multiple driving circuits are merged into a single integrated driving circuit that incorporates multiple current control circuits. This unified structure reduces device complexity by eliminating redundant components, simplifying the overall circuit architecture, and making the lighting device easier to design and manufacture while maintaining the capability to supply different current magnitudes to various light-emitting elements.

Inventive Principle:

Principle #5Merging (Combining)

3Area of stationary object

If a single driving circuit is used to supply currents to multiple light-emitting elements, then the mounting area is reduced, but the ability to supply currents of different magnitudes must be maintained

Engineering Contradiction:

Improvemounting areaVSAvoidcurrent magnitude control

Core Design Contradiction:

Area of stationary objectVSAdaptability or versatility

Solution Approach 1:

The single driving circuit is segmented into multiple independent current control circuits, each capable of independently regulating the current magnitude for a specific light-emitting element. This segmentation allows the circuit to maintain high adaptability and current control capability while being integrated into a compact single-unit structure that reduces mounting area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The single driving circuit is designed as a multi-functional integrated circuit that can perform multiple current control functions simultaneously. Each current control circuit within the single driving circuit can independently adjust current magnitudes for different light-emitting elements, maintaining the versatility needed for color gamut optimization while reducing the overall mounting area.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 enables efficient supply of currents of different magnitudes to light-emitting elements within a single driving circuit, reducing the mounting area and facilitating the design of compact and thin lighting devices while improving color gamut and display quality.

Implementation Method 1

a first light emitting element, a second light emitting element, and a driving circuit driving the first light emitting element and the second light emitting element

Methodology Applied

Scientific EffectLight emission from LED elements: Light Emitting Diode

Data Source

PatentUS20250168946A1Lighting device

Publication Date: 2025.05.22 SHARP DISPLAY TECHNOLOGY CORP

AI summary

A lighting device includes a first light emitting element, a second light emitting element, and a driving circuit driving the first light emitting element and the second light emitting element. The driving circuit includes a current supply supplying currents to the first light emitting element and the second light emitting element, a first current controller controlling a magnitude of a first current supplied from the current supply to the first light emitting element, and a second current controller controlling a magnitude of a second current supplied from the current supply to the second light emitting element.