RGB-IR LED Package Layout for Flicker-Free Wide-Gamut Displays
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Solution Overview
Problem
LED displays for cinema face challenges such as flicker at low brightness conditions, achieving certain color spaces like REC2020, and integrating immersive audio, while simulator environments require adaptations for night vision goggles (NVGs).
Innovation Solution
LED packages with two sets of RGB LEDs emitting different wavelengths, integrated circuits for independent control, and an optional infrared LED, arranged in an active matrix to reduce flicker and enhance color gamut and audio transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive drive LEDs are used in LED displays, then device complexity is reduced, but flicker occurs particularly at low brightness conditions
Solution Approach 1:
The LED display is divided into multiple independently controllable LED modules or pixels, each with its own active drive circuit. This segmentation allows each module to be driven actively rather than passively, eliminating flicker while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
The patent implements dynamic control of LED brightness through active drive circuits that can independently adjust current levels for each LED module. This dynamic control enables flicker-free operation at low brightness conditions by maintaining stable current delivery, unlike passive RC-driven LEDs which exhibit voltage decay and flicker.
2Ease of manufacture
If standard RGB LED packages are used, then manufacturing is simplified, but achieving certain color spaces like REC2020 becomes challenging
Solution Approach 1:
The patent employs LED modules with specifically selected LED chips that have precise wavelength characteristics tailored to achieve REC2020 color space. Each LED module contains red, green, and blue LEDs with carefully controlled peak wavelengths and spectral properties, allowing the display to meet stringent color accuracy requirements while using standardized package structures for manufacturability.
Solution Approach 2:
The invention utilizes LED chips with specific wavelength parameters and spectral distributions that are optimized for REC2020 color space coverage. By selecting and combining LED chips with precise wavelength characteristics (e.g., red at 630nm, green at 530nm, blue at 465nm), the system achieves wide color gamut and accurate color reproduction while maintaining compatibility with standard LED manufacturing processes.
3Object-affected harmful factors
If projection cinema systems use audio behind screen, then immersive center channel is achieved, but LED displays require complex audio steering technology
Solution Approach 1:
The LED display structure is designed with multi-functionality, serving both as the visual display surface and as the acoustic transmission surface. The same LED module housing and mounting structure that supports the visual LEDs also provides acoustic pathways and speaker mounting positions, allowing audio to pass through the display screen similarly to projection systems without requiring separate complex audio steering mechanisms.
4Adaptability or versatility
If LED displays are adapted for NVG simulator environments, then night vision simulation is enabled, but additional infrared components and complexity are required
Solution Approach 1:
The patent combines visible light LEDs and infrared LEDs into integrated LED modules that share common drive circuits and control logic. Each display pixel or module contains both RGB LEDs for visible output and infrared LEDs for NVG compatibility, allowing simultaneous control of both visible and infrared channels through unified driving schemes. This merging reduces overall system complexity compared to separate visible and infrared display systems.
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
Provides flicker-free operation, supports REC2020 color space, and enables audio transparency, offering a more immersive viewing experience with reduced complexity and cost in manufacturing.
Implementation Method 1
an first group of a red LED, a green LED, and a blue LED; an second group of a red LED, a green LED, and a blue LED
Implementation Method 2
an infrared LED, the plurality of groups of RGB LEDs and the infrared LED being in a least a two-to-one ratio
Data Source
AI summary
A light emitting diode (LED) device is provided, comprising: a circuit board; a plurality of light emitting diode packages arranged on the circuit board, an LED package comprising: a plurality of groups of red, green and blue (RGB) LEDs; and an infrared LED, the plurality of groups of RGB LEDs and the infrared LED being in a least a two-to-one ratio; and an electrical connector connected to LEDs of the plurality of LED packages, the electrical connector configured to communicate with an image providing device.