Custom Test Jigs & Tooling: Per-Unit Test for Display Production
Volume display production fails quietly when test is left to the eye. A custom test jig is the engineering that makes every unit provably good: a fixture that mates to the module and exercises every rail, the panel link, touch and backlight; adapter and conversion boards used in development and on the line; an aging step that catches infant mortality; and per-unit programming that stamps settings into each unit. This page covers the tooling we develop and why it is designed alongside the product, not after.
What a Production Jig Exercises
| Check | What the fixture does |
|---|---|
| Power rails | Verify every regulated rail at its tolerance, under load |
| Panel link | Drive the native interface and confirm a stable image, no sync loss |
| Touch | Stimulate the touch controller and confirm coordinate reporting |
| Backlight | Confirm current, brightness and dimming behavior |
| Programming | Write OTP where supported, stamp and log firmware version |
Tooling Beyond the Fixture
Around the jig sit the boards that make development and the line possible: adapter and conversion boards (for example MIPI, LVDS and RGB breakouts and one-to-one PCBs) used to bring up and validate modules; aging boards that run assemblies warm for a defined soak to catch early failures; and switching or decode boards for multi-signal validation. These are developed per project and are what let an engineering sample become a repeatable production item.
Aging and Infant Mortality
The most expensive failure is the one that dies in the field in week two. An aging step - running the assembled module warm for a defined period on the fixture - stresses the weak units out before shipment. Combined with per-unit programming and logged test results, it turns 'we hope they are good' into 'we measured that they are good.'
Designed With the Product, Not After
The fixture is specified from the same input spec as the board and panel, so its test profile tracks the design instead of lagging it. The payoff is concrete: pilot batches arrive actually testable, acceptance criteria are written into the fixture's report format, and you receive the fixture and its format at handover so you can run the same test on your own line or at a second source.
Matching Standard Panels
Tooling is matched to the module under test. These standard models span the sizes we most often fixture:
- RG-T043BPSA-01 — 4.3″ 480x272 IPS TFT LCD Module
- RG-T070BAE-32 — 7.0″ 1024x600 TN TFT LCD Module
- RG-T101BAH-01 — 10.1″ 1024x600 TN TFT LCD Module
Related Guides
- Custom Display Driver Board: From Specification to Shipment — where the fixture fits the flow
- TFT Firmware & OTP Burning — per-unit programming the fixture supports
- Display Driver Board & PCBA Solutions — the board the jig tests
- ODM Process & Stock (0 MOQ) — how tooling fits our production
Frequently Asked Questions
Why do I need a custom test jig?
Beyond hand inspection, a jig exercises every rail, the panel link, touch and backlight on every unit, and supports per-unit programming of panel settings. It turns 'inspected by hand' into 'tested by fixture' - the difference between a pilot batch that is actually testable and one that is not.
What kinds of jigs do you build?
Bed-of-nails and connector-mating fixtures for the module, plus adapter and conversion boards (for example MIPI/LVDS/RGB breakouts) used in development and on the line, aging boards, and switching boards for multi-signal validation. Tooling is developed alongside the product, not after.
Does the jig support per-unit programming?
Yes. The fixture can write OTP where the driver IC supports it and stamp firmware version per unit, then read values back and validate against acceptance limits, logging the result per serial number.
Can I keep the fixture for my own line?
Yes. The fixture and its test-report format are part of the handover package, so you can run the same test on your own line or at a second factory.
Talk to Our Engineers
Send your module model (or panel and interface) and your per-unit test requirements to sales@odmlcd.com - we will reply with a fixture proposal and the test-profile format for your project.