MicroLED Multiview Display with Angular Light Control
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Solution Overview
Problem
Conventional display technologies, such as LCDs, face limitations in energy efficiency, contrast, and response time, while stereoscopic technologies require glasses for 3D vision, lacking in energy-efficient and high-contrast solutions for multiview displays without glasses.
Innovation Solution
A multiview display using microLED technology with tunable color and intensity microLED unit cells, each equipped with a lens to control emission angles and profiles, allows different images to be perceived by viewers based on their observation angle, enabling energy-efficient, high-contrast, and responsive 3D vision without glasses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional LCD technology is used, then device complexity is reduced, but energy efficiency deteriorates and contrast ratio deteriorates
Solution Approach 1:
The patent employs microLED technology which fundamentally changes the lighting parameters from LCD's backlight system to self-emissive microLEDs. This parameter change enables superior energy efficiency (up to 30 times greater total brightness than OLED with lower power consumption) and contrast ratio while maintaining manageable device complexity through integrated microLED arrays
Solution Approach 2:
The patent replaces the mechanical/optical system of LCD (backlight, polarizers, liquid crystals) with a direct emissive microLED system. This substitution eliminates the need for complex optical components and achieves better energy efficiency and contrast through direct light emission from microLEDs, resolving the contradiction between energy efficiency and device complexity
2Ease of operation
If glasses-based stereoscopic technology is used, then 3D vision is achieved, but ease of operation deteriorates and device complexity increases
Solution Approach 1:
The patent divides each pixel into multiple microLEDs arranged in arrays, with each microLED controllable to emit light at specific angles. This segmentation enables different images to be directed to different viewing positions without requiring glasses, achieving autostereoscopic multiview display that improves ease of operation while managing device complexity through systematic pixel structure
Solution Approach 2:
The patent adds the angular dimension to light emission by controlling microLEDs to emit at different angles. This dimensional change enables viewing-angle-dependent image presentation, creating glasses-free 3D and multiview effects that improve ease of operation without requiring additional glasses-based components
3Adaptability or versatility
If microLED technology with angular control is used, then multiview capability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic control of microLED emission angles through independently controllable microLED arrays within each pixel. This dynamic capability allows the display to adapt to different viewing positions and present different images to different viewers, significantly improving multiview capability while managing device complexity through systematic angular control mechanisms
Solution Approach 2:
The patent makes each pixel universally functional by enabling it to emit multiple images at different angles simultaneously. This multi-functionality allows a single pixel structure to serve multiple viewing positions, improving adaptability and multiview capability without requiring separate display structures for each viewing angle, thus managing device complexity
4Illumination intensity
If OLED technology is used, then contrast ratio is improved, but energy efficiency deteriorates and brightness deteriorates
Solution Approach 1:
The patent transitions from OLED's organic electroluminescence to inorganic microLED technology, fundamentally changing the emission parameters. This parameter change enables up to 30 times greater total brightness than OLED with lower power consumption and higher efficiency (cd/W, c/A, nits/W, or nits/A), resolving the contradiction between brightness and energy efficiency
Solution Approach 2:
The patent employs composite microLED structures based on indium gallium nitride (InGaN) and/or aluminum indium gallium phosphide (AlInGaP) materials. These composite material systems enable superior brightness and energy efficiency characteristics compared to OLED, resolving the contradiction between illumination intensity and energy use
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 microLED multiview display provides efficient energy use, high contrast, and responsive 3D vision by adjusting light emission based on viewer position, overcoming limitations of conventional displays and stereoscopic technologies.
Implementation Method 1
MicroLED is an emerging display technology that employs arrays of microscopic LEDs to implement the individual pixels of the display
Implementation Method 2
at least one lens positioned over the plurality of sets of microLEDs for controlling an emission angle and emission profile of the light emitted by the microLED unit cells
Data Source
AI summary
An apparatus and method for displaying an image are disclosed. The apparatus includes microLED unit cells including sets of microLEDs each emitting light and at least one lens to control an emission angle and emission profile of the light emitted by the microLED unit cells. A display controller controls an intensity distribution of the microLED unit cells in accordance with first and second video data signals such that a first portion of the emitted light is emitted at a first emission angle with a first emission profile at a first observation angle relative to a display and a second portion of the emitted light is emitted at a second emission angle with a second emission profile at a second observation angle relative to the display. The first and second light portions form unrelated images.