Master-Slave Backplane for Multi-Panel Micro-LED Display
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Solution Overview
Problem
Current augmented reality (AR) glasses face challenges in achieving high-resolution, energy-efficient displays due to the limitations of existing micro-LED technologies in terms of pixel pitch and compatibility with host processor systems.
Innovation Solution
A three-panel micro-LED display device with a master-slave backplane configuration using CMOS technology, where each panel generates red, green, and blue components, and an optical element combines these components, enabling high-resolution images in a compact form factor suitable for AR glasses, with digital-to-analog converters and timing logic integrated into a single CMOS chip for efficient image processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If micro-LED display technology is used to achieve high resolution, then picture resolution is improved, but pixel pitch becomes too small for current manufacturing capabilities
Solution Approach 1:
The display is divided into three separate panels (red, green, blue) instead of attempting to manufacture all pixels in a single ultra-dense array. Each panel is manufactured with achievable pixel pitch and then combined optically to achieve the target 2K by 2K or higher resolution, resolving the manufacturing precision limitation while maintaining high picture resolution.
2Measurement precision
If multiple separate panels are used to achieve high resolution, then picture resolution is improved, but device complexity increases
Solution Approach 1:
Three separate color panels are optically combined into a single integrated display output using optical elements. The backplane integrates multiple driver circuits and digital-to-analog converters to control all three panels simultaneously, merging their functions into a unified high-resolution display system that achieves 2K by 2K resolution without requiring complex external control systems.
3Measurement precision
If high-speed image data processing is implemented, then image quality is improved, but power consumption increases
Solution Approach 1:
High-speed image data processing and digital-to-analog conversion functions are extracted from external processors and integrated directly into the backplane circuitry. This allows image data to be processed at the display interface level, reducing the need for continuous high-power processing in external systems while maintaining high image quality through synchronized multi-panel control.
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 high-resolution, energy-efficient displays for AR applications by synchronizing image components and reducing power consumption, allowing for seamless integration with existing host processor systems, thus enhancing the AR experience.
Implementation Method 1
an array of pixels for generating a respective image component (206) wherein each pixel comprises a light emitting diode (LED) having a pitch of less than 10 micrometers (μm)
Data Source
AI summary
A display device suitable for augmented reality glasses or other display applications includes a three panels of ultra-dense micro-LED arrays integrated in a compact form factor. The panels each monochromatically generate red, green, and blue components of an image, and an optical element optically combines the image components to form an output image. Each panel includes a backplane with timing logic and CMOS pixel drivers for driving the micro-LED arrays. The backplanes may be interconnected in a master-slave configuration in which a master backplane receives image data from a host processor and sends image data directly or indirectly to the slave backplanes. The master backplane may furthermore output various timing signals to the slave backplanes to synchronize output of the image components.