Multi-Laser Thermal Modeling for Self-Heating and Crosstalk
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Solution Overview
Problem
Conventional laser systems struggle to accurately model thermal effects, particularly in multi-laser systems with asynchronous timing intervals, leading to inaccuracies in display quality and hardware degradation due to inadequate consideration of self-heating and crosstalk between devices.
Innovation Solution
A laser display system that models thermal effects by synchronizing temperature values across multiple laser devices using a summing module and control logic, accounting for self-heating and crosstalk, to determine accurate system temperatures for precise laser driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional laser systems use multiple laser devices with different asynchronous timing intervals, then the system can achieve greater versatility and functionality, but the ability to accurately model thermal effects deteriorates due to the complexity of synchronizing temperature values across devices
Solution Approach 1:
The patent divides the thermal modeling process into separate segments for each laser device, with individual infinite impulse response (IIR) filters processing temperature data for each device independently. This segmentation allows each laser's thermal effects to be modeled separately according to its specific timing interval, then combined to achieve accurate overall thermal modeling without the complexity of synchronous processing.
2Manufacturing precision
If the system increases the number of laser devices and filters to improve display quality, then the system can provide better color and intensity accuracy, but the complexity of modeling thermal effects increases making it difficult to account for self-heating and crosstalk
Solution Approach 1:
The patent implements a universal thermal modeling approach where each laser device is assigned an IIR filter that handles multiple functions: modeling self-heating effects, accounting for crosstalk from other devices, and processing data at different timing intervals. This multi-functional filter design simplifies the overall system architecture while maintaining the ability to handle complex thermal interactions in multi-laser configurations.
Solution Approach 2:
The system employs feedback mechanisms where temperature measurements from all laser devices are continuously fed into the IIR filters, which then adjust the thermal models in real-time. This feedback loop enables the system to dynamically account for self-heating and crosstalk effects, maintaining accurate thermal modeling even as display quality requirements increase the number of laser devices.
3Device complexity
If the system fails to accurately model thermal effects, then hardware can be simpler, but display quality deteriorates over time due to incorrect laser driving currents causing inaccuracies and accelerated wear
Solution Approach 1:
The patent implements preliminary thermal modeling by continuously calculating and storing temperature values for each laser device using IIR filters before the actual laser driving occurs. This preliminary action allows the system to pre-determine the appropriate driving currents that compensate for anticipated thermal effects, ensuring consistent display quality and preventing hardware wear before problems occur.
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 system provides accurate thermal modeling, ensuring consistent display quality by adjusting laser driving currents based on synchronized temperature data, reducing hardware wear and improving display accuracy.
Implementation Method 1
modeling thermal effects for a set of laser devices based on a combination of self-heating effects and crosstalk between the set of laser devices
Implementation Method 2
modeling thermal effects for a set of laser devices based on a combination of self-heating effects and crosstalk between the set of laser devices
Data Source
AI summary
The present disclosure relates to systems, methods, and computer readable media for modeling thermal effects within a multi-laser device. For example, systems described herein may include a plurality of laser devices that output energy streams having corresponding operating windows. One or more systems described herein may include a set of accumulators for tracking quantities of energy samples within operating windows and populating a queue representative of the tracked quantities. One or more systems described herein may additionally include filters and a summing module for determining temperature values for operating windows and synchronizing the temperature values with one another to determine an accurate system temperature for the multi-laser device. The features described herein facilitate synchronization of data for corresponding operating windows to provide an accurate determination of system temperature based on a combination of self-heating and crosstalk effects between multiple laser devices.