Hey, I'm Qidi Lin,

based in Shanghai, building native apps, handheld software, and display hardware.

Microelectronics master's student.

Focused on typesetting tools, device UI, and next-gen display systems.

InkPond

Now on the App Store

TrimUI

Handheld-native apps and packaging

360 zones

MiniLED backlight algorithms

822,997 Reads

sspai writing

Works

InkPond Native Typst Editor for iPhone & iPad

Formerly Typist, now shipped on the App Store as InkPond. Built with SwiftUI and a Rust FFI bridge to Typst, with live preview, multi-file projects, font management, and PDF export on iPhone and iPad.

SwiftUIRust FFITypstApp Store

TrimUI-WeRead WeRead Client for TrimUI

A native WeRead client for TrimUI Brick with QR login, bookshelf browsing, paginated reading, chapter navigation, local resume state, and cloud progress sync across NextUI, Stock OS, and CrossMix-OS builds.

RepeatNow Anki Vocabulary Trainer for TrimUI

A native C + SDL2 vocabulary trainer for TrimUI Brick. It imports `.apkg` decks directly on device, keeps review state in SQLite, and ships as a polished button-first study flow.

Nothing Clock Nothing-inspired Clock & Weather App

A Nothing-inspired utility suite for TrimUI Brick with a dot-matrix clock, weather, countdowns, and timer pages, packaged as a ready-to-install NextUI app.

MiniLED Zonal Backlight Control System

An FPGA-based MiniLED zonal backlight system that achieves real-time 1280x800@60Hz video processing with 360-zone luminance control, multiple local dimming algorithms, and ambient-light adaptive tuning.

Gowin FPGAVerilog HDLHDMI RXBacklight Algo

C0llecti0n Media Collection Manager

A personal media collection system for books, movies, series, and music. Built with Astro and JSON-first storage to stay lightweight, portable, and easy to maintain long term.

AstroTypeScriptJSONPersonal Infra

Research

Enhanced Light Extraction of an OLED with low-color-shift and near Lambertian distribution via an External Quasi-Periodic Convex-Sphere Film Academic Paper

Synthetic Metals, 2026 (IF = 4.6)

Investigates OLED light-extraction and color-shift tradeoffs using an external quasi-periodic convex-sphere film. Demonstrates enhanced extraction with low color shift and near-Lambertian distribution.

OLEDLight ExtractionPublished
View Paper →

Ionic Liquid Modified Hole Transport Layer Research Project

Explores TFSI ionic-liquid modified PEDOT:PSS to improve OLED hole injection and device stability. Currently focused on process tuning and repeatability validation.

OLEDResearchOrganic Electronics

About

sspai Author

2022 - 2024

Published long-form writing on tools, product design, and digital life in one of China's leading tech communities. Delivered 13 articles, 11 homepage features, and 822,997 total reads.

ContentDesignTech Writing

Embedded Software Intern

2022

Built a toaster temperature-control algorithm plus dot-matrix display driver and menu system for vertical electric fryers. Delivered end-to-end implementation on ATmega microcontrollers.

EmbeddedATmegaC

Capabilities

App & Product Engineering

SwiftUI, Rust FFI, SwiftData, iCloud workflows, Typst engine integration (InkPond)

Device Software

Linux embedded development, C / C++, SQLite, graphical UI, and on-device application delivery

Display & Hardware

Verilog HDL, Gowin FPGA, ATmega, local dimming pipelines and display tuning (MiniLED)

Design & Writing

Astro, TypeScript, Figma, Blender, tech writing (822,997 reads on sspai)