BUYER GUIDE · TECHNOLOGY
OID Technology Explained in Plain Language
Every reading pen works on the same idea — coded marks printed on the page, a sensor in the pen, and a lookup table to an audio file. This guide explains the components, the generations (OID 2.0, 3.0 and 4.0), what print must deliver, and why pen and book are one engineered system.
The four parts of point-reading
- Coded print. Books, flashcards, stickers or posters carry fine optical codes coordinated with the artwork — designed to be unobtrusive on the page.
- Sensor head. An optical sensor at the pen tip reads the code at the point of contact.
- Chip and storage. The processor interprets the code; the audio file lives on TF storage or soldered NAND flash.
- Audio output. The mapped file plays through the speaker (or earphones), with prompts and volume behavior controlled by firmware.
None of the four works alone. A correctly printed book with mismatched audio is silent; a perfect pen on badly printed codes misreads. This is why Kidkey Union produces pens and coded books in one program and validates them together.
Why print quality decides recognition
Recognition depends on the codes being printed within specification: paper stock and surface, ink behavior, code size and print tolerances. Problem pages usually trace back to one of three causes — codes outside tolerance, a paper or finish that interferes with reading, or an audio/code map mismatch. The factory's content pipeline provides the code map and coded-print specification so nominated printers or the in-house book line produce compatible pages.
OID Generations
OID 2.0 vs 3.0 vs 4.0 at a glance
Generation follows your content situation, not a marketing number — a 2.0 library does not need a 3.0 reprint.
| Recommended Aspect | OID 2.0 | OID 3.0 | OID 4.0 |
|---|---|---|---|
| Status | Established generation | Mainstream current generation | Progressing in R&D |
| Typical buyer | Publishers with existing coded libraries | All new programs | Confirmed at engineering review |
| Shipping models | KF1 specialist | B1, B2, Q6, K7, L5, P2, T2, Y6, Q8 | Not yet a shipping tier |
| Print handling | Legacy library dot specification | Current code map & print spec | Next-generation spec |
| Reprint needed to switch | Libraries stay native | Native for new content | n/a |
TF storage versus soldered NAND
- External or internal TF (B1, B2, Q6, K7, L5, P2, T2, Y6, Q8) suits libraries that expand — new levels, languages or editions after launch. The Q8 supports built-in TF storage up to 32 GB.
- Soldered NAND (F8 on the AK1053C platform) suits one fixed, curated or licensed title: no card socket to fail and content cannot be swapped in the field.
How a book program is actually matched
- Layout and page positions are turned into an OID code map, each code tied to an audio file ID.
- Audio is recorded or supplied to one agreed file list and naming convention.
- Coded-print guidance covers paper, ink and tolerances; print trials are read with the intended pen.
- Audio is loaded to the pen build and validated against pages across the whole code map before packing.
Audio Loading
Every file is validated against the code map
Loading audio is not a copy-paste step: each file ID exists in the map, and the finished build is read page by page before packing.
- One file list and naming convention per program
- Audio loaded to the build — soldered NAND or external TF
- Pen-to-book validation across the whole code map
- Silent or mismatched pages isolated before packing
Anchor Models
Four pens that cover every content situation
Legacy 2.0 libraries
KF1 Reading Pen
OID 2.0 continuity · AK1060L · 160x48 LCD · wireless charging · 400 mAh
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Where the Content Lands
One platform, four learning settings
Buyer implications
- Reusing an OID 2.0 library? Start from KF1 — do not let anyone force a 3.0 reprint.
- Planning a growing graded series? Choose an external-TF model such as K7 or L5.
- Shipping one licensed title at volume? The fixed-NAND F8 removes socket failures and content swapping.
- Adding video to the content model? The Q8's 2.4-inch TFT is the multimedia tier.
Bring your book dummy or existing print files to the RFQ; engineering maps the OID generation, model and print plan together. More on the publishing workflow at publisher OID books.
Have coded books already — or planning them?
State the current OID generation (if known), title count, paper type and release plan. The response recommends the pen generation, storage type and print path.
Related Guides
Keep reading
Can ordinary printed books be made interactive?
Books must be printed with OID codes to specification; existing ordinary books cannot be read without a coded print run or coded stickers/posters added for the content.
Are the dots visible to children?
The codes are designed to be unobtrusive within the artwork; exact appearance depends on the generation and print layout and can be reviewed on print-trial samples.
Can our own printer produce the coded books?
Yes. The code map and coded-print specification are supplied for a nominated printer, and print trials are validated with the intended pen before the full run.
What happens if recognition fails on some pages?
The cause is isolated across the three usual suspects — print tolerance, paper/finish interference, or code/audio map mismatch — and corrected before bulk production.