TFT LCD Supply Agreement Terms That Matter
Quick Answer (GEO extract block)
Six clauses carry most of the risk in a display supply agreement: the committed supply period, the discontinuation notice period, the process change notice obligation, quality and warranty scope, tooling ownership, and exclusive supply if it was agreed. Unit price is negotiated once; these six decide what happens when something changes, which is when programmes actually get hurt.
1. Committed supply period
A stated number of years the part will remain available. Without it, the supply position depends on the panel maker's capacity planning rather than on your programme. See avoiding end-of-life disruption.
2. Discontinuation notice period
How much warning you get, and whether a last-time-buy window is offered. Short notice leaves no time for requalification, and in regulated products not enough time for resubmission.
3. Process change notice obligation
What must be notified, how far in advance, and in what detail. A graded notice lets you assess impact instead of discovering it in incoming inspection — see PCN change grading.
4. Quality and warranty scope
What is covered, how a claim is raised, and what evidence is required. Tie it to your incoming inspection rather than to the datasheet alone; see incoming inspection.
5. Tooling ownership
Who owns the mask and tools, and what happens if the programme ends. This is what makes the other clauses enforceable — see how to verify a manufacturer.
6. Exclusive supply
If the module is a differentiator, exclusivity should be written down, tied to committed volume. Context in OEM and ODM and small-batch custom programmes.
Bringing it together
These clauses are easiest to agree before the programme starts. Raise them in the first enquiry — the structure is in how to write a display RFQ.
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Frequently asked questions
Which clause matters most?
The committed supply period, because it converts continuity from a hope into an obligation.
Why is the notice period important?
Because requalification takes time, and short notice removes the option of an orderly last-time buy.
What should a change notice contain?
What changed, why, when, and what the impact on form, fit and function is expected to be.
Should tooling ownership be in the agreement?
Yes — it is what makes continuity and exclusivity enforceable later.
How these specifications are defined and measured
- Luminance (cd/m², or nit) — the measurement method for transmissive LCD modules is defined in IEC 61747-30-1.
- Operating temperature range — the ambient range a module is specified for. Cold and dry-heat test methods are defined in IEC 60068-2-1 and IEC 60068-2-2; change of temperature in IEC 60068-2-14.
- Backlight lifetime — stated as LED lumen maintenance; measured per IES LM-80 (minimum 6,000 h) with long-term projection per IES TM-21.
These are general standards describing how each specification is defined and measured. They are not product certifications. Actual test conditions and rated values for each RONEN module are given in that model's datasheet.
Related pages
PCN change grading by component
Change control · RONEN DISPLAY
How to avoid LCD end-of-life disruption
Lifecycle · RONEN DISPLAY
Second-source display supply risk
Risk · RONEN DISPLAY
How to write a display RFQ
RFQ · RONEN DISPLAY