Research and Product Experience
Display System Engineer, Apple Inc., Cupertino, CA, USA. [1,2]
Jun 2024 - Current
MacBook Pro with PROLED XDR Display 2026 - Display Module Optics DRI
PROLED XDR Display key features delivered (Technical Report)
- The world's best laptop display: With true-to-life color (Wide color gamut P3 + Adobe RGB), and unparalleled brightness (HDR and SDR 2000nits peak) and contrast (10 million to 1).
- Display engine intelligence: The display engine precisely controls the color and luminance of every pixel at the sub-millisecond level, compensating for content, pixel use, temperature, and environment all at once. The result is exceptional brightness uniformity and shadow detail, even in fast-motion content. It also monitors each pixel’s usage to preserve stunning image quality over time.
- Display sensor integration with on-cell touch and dynamic island: Touch sensor directly integrated on the OLED display for multi-touch capability and dynamic island design for camera and ambient light sensor integration.
- Lighter weight and thinner display module for back luminance apple logo integration: Due to the thin and light PROLED XDR Display module, the MacBook Pro 16" weight drops to 4lb and the 14" weight drops to 3lb. The thinner display module space also enables the independent light source to bring back the back luminance apple algo.
PROLED XDR Display development executions:
- Led PROLED XDR Display module Engineering Requirement Specifications (ERS) definition: comprehensive user study for specification requirements of the front-of-screen index developed for the user experience control. High-throughput test station bring-up for index optical metrology, and module/system-level testing SOP development to optimize test coverage and reduce takt time for efficient quality control.
- Drove the convergence of the Main Issues List (MIL) for key display module yield detractors: Designed advanced Design of Experiments (DOEs) and utilized factory build data to execute root-cause failure analysis (FA) and drove corrective action execution with vendor and internal cross-functional teams across the program from proof of concept to mass production.
- DataGenius tool for PROLED XDR Display development data analysis and visualization: Built a Generative AI agent backend with enterprise Claude code for automated data ingestion and correlation pipelines via internal APIs to enable automated data summary, visualization, failure analysis, and natural language querying across high-dimensional, multi-station manufacturing datasets. Helped manage the product development data across the build.
PROLED XDR Display differentiated innovation:
- Per PROLED XDR Display Module Smart Calibration (\$50M+ Savings) [1]: Developed an ML-assisted Self-Predictive Engine for per-pixel display compensation (De-Mura), \textbf{enabled approx. \$50M in manufacturing cost savings} by replacing physical camera captures with model predictions in the production line. Accelerated heavy math pipelines via GPU/CUDA and deployed securely encrypted calibration software directly to vendor factories.
- Black level and Color compensation for low brightness user experience [2]: Developed the black level and color tuning policy for the low brightness color management for PROLED XDR display; Enabled the user experience of the 10 million-to-1 contrast ratio and P3 and AdobeRGB wide color gamut user experience in low-light conditions.
- Display sensor integration architecture and roadmap research: Worked with the sensor team and system team for display sensor integration. Depending on various technology maturity of mass production, provided theoretical analysis and worked with vendor for prototyping the future product roadmap architecture.
Research Assistant, MIT, Cambridge, MA, USA. [3]
Sep 2019 – May 2024
Heterogeneous Integration of Spin-Photon Interfaces with a Scalable CMOS Platform (Ph.D. Thesis)
QSoC [3] key features delivered:
- Freely scalable quantum hardware architecture: Engineered a "Quantum System-on-Chip" (QSoC) integrating thousands of addressable spin qubits in 2D microchiplet arrays onto a CMOS circuit; managed the full lifecycle from foundry tapeout through cleanroom nanofabrication and custom optical routing assembly.
- Hardware design and simulation for the whole quantum system performance analysis: Comprehensive digital model build-up for the whole quantum system from mechanical simulation, optical simulation, circuit simulation, and system-level simulation.
- Quantum system integration with manufacturable process and validation: Integrated the designed PCB board, CMOS chip, and nanofabricated spin qubit 2D microchiplet array together, putting it in the cryogenic system. Developed benchtop electronics and optical setup to drive and test the quantum system performance.
Hardware architecture and design:
- Scalable quantum hardware fabrication and control architecture: Designed all the critical components compatible with semiconductor fabrication for spin qubit mass production. Designed the scalable optical communication protocol to enable parallel remote connection of the spin qubits in the 2D array.
- Optical & mechanical simulation: Modeled physical tuning profiles via COMSOL (FEA); simulated Photonic Integrated Circuits (PICs) via Lumerical Interconnect; ran FDTD far-field optimizations; and designed free-space micro-optics lens systems in Zemax Opticstudio. Led PIC chip tapeouts with TSMC, Sandia National Lab.
- PCB & silicon design: Tapeout of custom 180nm High-Voltage CMOS backend control chips (Cadence) featuring digital serial interfaces, high-voltage sample-and-hold arrays, and RF transmission line management switches. Designed the PCB (using Altium) to drive the silicon for testing. Led chip tapeouts with TSMC and PCB tape-outs with domestic vendors.
System integration and validation:
- Manufacturing & packaging integration: Executed lock and release nanostructure integration, and transfer printing via PDMS/tungsten probes; managed fiber array active alignment, and chips/optics packaging with wire bonding.
- Automated metrology system setup: Programmed multi-instrument hardware testbeds ({Python/C++/Matlab) to synchronize signal inputs and detector data; automated MEMS mirror scans, widefield camera alignments, motorized stages and actuators to perform auto positioning and measurement.
- AI Scheduling system feature with quantitative analysis: Modeled quantum state transfers via Bayesian probability, classified qubit quality using PyTorch, and isolated signal patterns with computer vision. Co-authored a "Transformer-on-QuPairs" ML scheduling architecture with Prof. Kaiming He to outperform traditional rule-based routing protocols.
Reference:
- Linsen Li, et al. "Self-Predictive Pixel Uniformity Compensation for Displays." US Patent Application No. US19772864, Filed Aug 11, 2026. (Non-Provisional)
- Haonan Zhao, Linsen Li, et al. "Black Level and Color Compensation for Displays." US Patent Application No. US64148164, Filed Sep 4, 2026. (Provisional)
- Linsen Li, et al. "Heterogeneous integration of spin-photon interfaces with a CMOS platform." Nature. (2024)