Micro LED 3D Display Panel with Parallax Barrier Grating
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Solution Overview
Problem
Current display technologies face challenges in efficiently creating both two-dimensional and three-dimensional image displays with high brightness, contrast, and low power consumption, particularly in miniaturized electro-optics devices like micro LED-based displays, which struggle to provide effective parallax barrier grating structures for accurate light direction and image separation.
Innovation Solution
A display panel design featuring a base substrate with a first micro LED array and a second micro LED array, where the second micro LED pixels are grouped to expose the first micro LED array, combined with a parallax barrier grating layer comprising black matrices and slits, directing light into specific view zones for three-dimensional image display and allowing two-dimensional image display by adjusting the operation of micro LED pixels and the parallax barrier grating units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a micro LED-based display panel uses a conventional single-layer structure, then the manufacturing process is simple, but it cannot achieve effective parallax barrier grating structures for accurate light direction and image separation in 3D display
Solution Approach 1:
The display panel is divided into two separate micro LED arrays (first and second arrays) positioned at different depths, with each array serving specific functions in the 3D display. The parallax barrier layer is segmented into multiple black matrix regions and transparent regions that work together to direct light from specific pixels to specific view zones, enabling accurate 3D image separation without requiring a completely new display architecture.
Solution Approach 2:
The patent implements a nested structure where the parallax barrier grating layer is integrated within the display panel structure itself, with black matrices formed between the first and second micro LED arrays. The transparent regions of the parallax barrier are positioned to align with specific micro LED pixels, creating a nested arrangement where the barrier functionality is embedded within the existing LED array structure rather than adding a completely separate external component.
2Length of stationary object
If the second micro LED array is positioned close to the first micro LED array, then the device thickness is reduced, but the parallax barrier grating layer cannot effectively direct light into distinct view zones
Solution Approach 1:
The parallax barrier layer is designed with spatially varying properties where different regions have different functions: black matrix regions block light from specific pixels while transparent regions allow light from corresponding pixels to pass through to specific view zones. The positioning and dimensions of these black matrix regions are locally optimized to achieve precise light direction control, with each black matrix region tailored to redirect light from its corresponding micro LED pixel to the appropriate view zone while maintaining compact overall thickness.
3Illumination intensity
If both first and second micro LED arrays are operated simultaneously at high brightness, then the display quality is improved, but power consumption increases
Solution Approach 1:
The display operates by periodically switching between different pixel groups in synchronization with the parallax barrier's light directing function. During 3D display mode, the system alternates between activating pixels behind transparent regions (for left eye view) and pixels behind black matrix regions (for right eye view), creating a time-multiplexed display approach. This periodic activation pattern allows high brightness perception through persistence of vision while significantly reducing overall power consumption compared to continuous full-array operation.
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
Enables both two-dimensional and three-dimensional image displays with improved brightness and contrast, utilizing the parallax barrier grating layer to effectively direct light for enhanced image separation and display quality, while maintaining low power consumption.
Implementation Method 1
each of the plurality of parallax barrier grating units is configured to direct light emitted from the first micro LED array into a first view zone and a second view zone
Implementation Method 2
each of the plurality of parallax barrier grating units is configured to direct light emitted from the first micro LED array into a first view zone and a second view zone
Data Source
AI summary
The present application discloses a display panel including a base substrate; a first micro LED array having a plurality of first micro LED pixels in a matrix along a first direction and a second direction on the base substrate; and a second micro LED array having a plurality of second micro LED pixels on a side of the first micro LED array distal to the base substrate, the plurality of second micro LED pixels being grouped into a plurality of groups of second micro LED pixels successively along the second direction, each of the plurality of groups of second micro LED pixels substantially along the first direction and comprising one or more rows of second micro LED pixels substantially along the first direction. Adjacent groups of the plurality of groups of second micro LED pixels are spaced apart from each other thereby exposing a portion of the first micro LED array.