Microdisplay Backplane Integration for Low-Bandwidth High-Refresh Control
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Solution Overview
Problem
Conventional microdisplay technologies face challenges with high system complexity, power consumption, and ergonomic issues due to the need for expensive external video control electronics and complex interfaces, especially in wearable applications, and are limited by pixel sizes and refresh rates.
Innovation Solution
A microdisplay architecture with integrated circuits and interfaces in a highly scaled technology node (<90 nm) allows for flexible operation modes, direct integration of components like frame buffers and interfaces into the backplane, enabling small pixel sizes and adaptive control of light-emitting elements with reduced bandwidth and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional microdisplay technologies use external video control electronics and complex interfaces, then control functionality is achieved, but system complexity and power consumption increase
Solution Approach 1:
The patent integrates video control electronics, interfaces, and display elements into a single microdisplay device. The control circuit is directly integrated with the light-emitting elements on the same substrate, eliminating the need for separate external control electronics and reducing system complexity while lowering power consumption.
Solution Approach 2:
The microdisplay device incorporates multiple functions within a single integrated structure, including data reception, processing, control signal generation, and light emission. This multi-functional integration reduces the need for separate dedicated components, thereby reducing overall system complexity and power consumption.
2Quantity of substance
If microdisplay uses integrated circuit architecture with image memory, then bandwidth requirements are reduced, but device complexity increases
Solution Approach 1:
The image memory stores display data in advance before it needs to be displayed. By pre-storing the data locally on the microdisplay device, the system reduces the bandwidth required for continuous data transmission, as only updated or changed data needs to be transmitted subsequently.
Solution Approach 2:
The display data is segmented into stored information in the image memory and dynamically updated information. This segmentation allows the system to manage data transmission efficiently, reducing bandwidth requirements by only transmitting necessary updates rather than continuous full-frame data.
3Manufacturing precision
If pixel size is reduced for higher resolution, then display quality improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs advanced fabrication processes that enable precise control of pixel dimensions at reduced scales. By optimizing process parameters such as material deposition thickness, etch depths, and transistor gating, the invention achieves high manufacturing precision necessary for small pixel sizes while maintaining display quality.
Data Source
AI summary
Microdisplay architecture, comprising: an optical plane with several pixel elements; a circuit plane on which the optical plane is arranged; wherein the circuit plane includes one or several interfaces, a pixel matrix control as well as an image memory for controlling the several light-emitting or light-modulating elements in dynamically selectable operating modes.