Optical Chiplet Communication for Display Bandwidth
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Solution Overview
Problem
Existing flat-panel display technologies face limitations in communication bandwidth and latency due to electrical signal transmission methods, which restrict the refresh rate, resolution, and accuracy of displays, especially in large and high-resolution applications.
Innovation Solution
The implementation of chiplets with integrated light detectors and emitters on a separate substrate, allowing for optical communication between control elements, which includes modulating and demodulating circuits for efficient data transmission using light signals, thereby increasing bandwidth and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical signal transmission methods are used for communication between control elements, then the display can be manufactured with conventional electrical interconnects, but the communication bandwidth is limited and latency increases
Solution Approach 1:
The patent replaces electrical signal transmission with optical signal transmission using light emitters and light detectors. This substitution enables higher communication bandwidth and reduced latency between control elements while maintaining manufacturing feasibility through integrated chiplet designs that combine both electrical and optical components on the same substrate.
2Productivity
If optical communication is implemented between control elements, then communication bandwidth increases and latency decreases, but the device complexity increases due to additional light emitters and detectors
Solution Approach 1:
The patent merges light emitters and light detectors with control elements into integrated chiplet structures. This combination allows optical communication functionality to be added without requiring separate discrete components, thereby increasing data transmission speed while minimizing the increase in device complexity through unified integrated designs.
Solution Approach 2:
The chiplet design incorporates multiple functions including control element functionality, light emission, and light detection within a single integrated structure. This multi-functionality enables the system to achieve high-speed optical communication while reducing the overall number of separate components and interconnections required.
3Ease of manufacture
If thin-film semiconductor materials are used for control elements, then the manufacturing process can be simplified, but the control elements are larger and have lower performance
Solution Approach 1:
The patent segments the display into multiple independent chiplets, each containing control elements. This segmentation allows the use of thin-film semiconductor materials for ease of manufacture while maintaining high performance through optimized chiplet designs that incorporate advanced transistor architectures and materials stacking approaches.
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
This approach enhances communication between active-matrix control elements in flat-panel displays, providing robust and high-bandwidth optical communication that can be used for image data transfer, enabling effective image manipulation and operation without increasing manufacturing costs or substrate volume.
Implementation Method 1
Light is emitted from a pixel when current passes through the light-emitting material
Implementation Method 2
Each chiplet further includes a light detector and a light emitter separate from the one-or-more layers of light-emitting material
Implementation Method 3
The chiplet circuitry includes a modulating circuit for modulating light emitted by the light emitter and a demodulating circuit for demodulating light detected by the light detector
Data Source
AI summary
An electroluminescent display includes a display substrate, a plurality of patterned first electrodes formed over the display substrate, one or more layers of light-emitting material formed over the plurality of first electrodes, at least one second electrode formed over the one or more layers of light-emitting material, and a plurality of chiplets. Each chiplet is electrically connected to a first electrode. Each chiplet further includes a light detector and a light emitter separate from the one-or-more layers of light-emitting material connected to the chiplet circuitry. The chiplet circuitry includes a modulating circuit for modulating light emitted by the light emitter and a demodulating circuit for demodulating light detected by the light detector so that light emitted by the light emitter of a first chiplet is received by the light detector of a second chiplet.