LED Package Pairs With IC Control 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 providing immersive audio, while adaptations for simulator environments like night vision goggles (NVGs) present specific issues.
Innovation Solution
Integration of LED packages with pairs of RGB LEDs emitting different wavelengths and integrated circuits (ICs) to support REC2020 color space, reduce flicker, and enable audio transparency, along with optional infrared LEDs for simulator environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive drive LEDs are used in LED displays, then the display structure is simple, but flicker occurs particularly at low brightness conditions
Solution Approach 1:
The patent divides each pixel into multiple sub-pixels with different drive mechanisms. Specifically, it segments the LED display into actively driven LEDs and passively driven LEDs, where the actively driven portion handles critical display areas to eliminate flicker, while the passive portion maintains structural simplicity. This segmentation allows the system to achieve flicker-free operation in important viewing zones without requiring the entire display structure to be complex.
2Ease of manufacture
If standard LED packages are used, then manufacturing is simple, but achieving REC2020 color space is difficult
Solution Approach 1:
The patent applies local quality by implementing different LED configurations in different spatial locations of the display. It uses actively driven LEDs with precise color control in critical display areas to achieve REC2020 color space accuracy, while using simpler passively driven LEDs in less critical areas. This localized differentiation allows the system to meet high color accuracy requirements where needed without complicating the entire manufacturing process.
3Reliability
If complex audio steering technology is used, then immersive audio is achieved, but device complexity increases
Solution Approach 1:
The patent makes the LED display structure multi-functional by integrating both display and audio transmission functions into the same physical infrastructure. The LED packages and circuit board serve dual purposes: visual display and audio signal transmission. This universality eliminates the need for separate complex audio steering systems, as the audio can be transmitted directly through the existing display structure, thereby achieving immersive audio without increasing device complexity.
4Ease of manufacture
If LED packages without integrated circuits are used, then manufacturing is easier, but flicker reduction capability is limited
Solution Approach 1:
The patent segments the LED package into two types: packages with integrated circuits for actively driven LEDs and packages without integrated circuits for passively driven LEDs. The actively driven packages include ICs that enable precise flicker control through independent LED control, while the passively driven packages maintain manufacturing simplicity. This segmentation allows the system to achieve flicker reduction where necessary without requiring all packages to be complex.
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, expanded color gamut, audio transparency, and reduced manufacturing complexity, enhancing the cinematic and simulator experience.
Implementation Method 1
a pair of red LEDs arranged adjacent to one another, the pair of red LEDs configured to emit respective red light at respective different red wavelengths; a pair of green LEDs arranged adjacent to one another, the pair of green LEDs configured to emit respective green light at respective different green wavelengths; a pair of blue LEDs arranged adjacent to one another, the pair of blue LEDs configured to emit respective blue light at respective different blue wavelengths
Data Source
AI summary
A light emitting diode (LED) device is provided, comprising: a circuit board; a plurality of LED packages arranged on the circuit board, an LED package comprising: a pair of red LEDs arranged adjacent to one another, the pair of red LEDs configured to emit respective red light at respective different red wavelengths; a pair of green LEDs arranged adjacent to one another, the pair of green LEDs configured to emit respective green light at respective different green wavelengths; a pair of blue LEDs arranged adjacent to one another, the pair of blue LEDs configured to emit respective blue light at respective different blue wavelengths. The LED device further comprises an integrated circuit (IC) configured to independently control the pair of red LEDs, the pair of green LEDs and the pair of blue LEDs; and an electrical connector connected to respective integrated circuits of the plurality of LED packages.