Inkjet Drop density – Throughput – Spread

Inkjet DTS is a minimal design model for understanding how print quality, throughput, and dot spread are causally coupled in inkjet printing systems.

Language	GitHub Pages 🌐	GitHub 💻
🇺🇸 English

This page presents a minimal educational model for understanding the fundamental trade-off in inkjet printing between:

• Print quality
• Printing speed

The model is intentionally simplified.
Its purpose is to clarify design causality, not to reproduce the behavior of real printers or specific products.

This repository is organized to clearly separate theoretical modeling, simulation code, and visual outputs.

inkjet-dts/
├─ _config.yml
├─ index.md
├─ README.md
│
├─ _layouts/
│  └─ default.html
│
├─ _includes/
│  └─ head.html
│
├─ assets/
│  └─ css/
│     └─ style.css
│
├─ demo/
│  ├─ index.html     
│  └─ demo.js
│
├─ code/
│  ├─ main.py
│  ├─ model.py
│  └─ render.py
│
└─ images/
   ├─ print_fast.png
   ├─ print_high_quality.png
   ├─ print_large_dot.png
   └─ print_small_dot.png

• code/ contains a minimal but explicit Python model of inkjet trade-offs
• images/ visualizes how parameter choices affect dot spread and print quality
• GitHub Pages is used to document the model, not to execute it

This separation keeps the system easy to understand, extend, and reuse for educational purposes.

Inkjet printing behavior can be reduced to three dominant axes:

• D — Drop density
  Number of ink drops per unit area
  → governs graininess and perceived image quality

• T — Throughput
  Ink ejection capability per unit time
  → limits achievable printing speed

• S — Spread
  Dot spread on the medium (ink–paper interaction)
  → determines sharpness versus bleeding

Most practical parameters
(dpi, passes, drop size, color count, nozzle count)
can be expressed as combinations of these three axes.

Lower drop density (FAST mode)

Higher drop density (HIGH QUALITY mode)

Small dot (sharper edges)

Large dot (increased bleeding)

Inkjet DTS (Drop Density – Throughput – Spread)

This interactive demo provides a conceptual visualization of the fundamental trade-off in inkjet printing:

• Drop Density (D) — number of ink droplets deposited per unit area
• Throughput (T) — printing speed / firing frequency
• Spread (S) — dot expansion caused by fluid dynamics and substrate interaction

By adjusting these three parameters, the demo illustrates how print quality and printing speed inherently compete with each other.
The visualization is based on a synthetic, educational model intended to build intuition — it does not represent measured data or a device-specific simulation.

👉 Launch Demo

• The images shown above are synthetic visualizations, not measured print data.
• They are designed to make qualitative differences immediately visible.
• Numerical accuracy and product-specific tuning are intentionally out of scope.

This project is intended to support:

• engineering education
• early-stage design discussions
• clear explanation of inkjet trade-offs

by keeping the model simple, executable, and visual.

📌 Item	Details
Name	Shinichi Samizo
Education	M.S. in Electrical and Electronic Engineering, Shinshu University
Career	Former Engineer at Seiko Epson Corporation (since 1997)
Expertise	Semiconductor devices (logic, memory, high-voltage mixed-signal) Thin-film piezo actuators for inkjet systems PrecisionCore printhead productization, BOM management, ISO training
GitHub

Suggestions, improvements, and discussions are welcome via GitHub Discussions.