Ask Which Display Module Is Behind the Quoted Screen Size

For a display-module quote, I would ask the supplier to put the complete offered part number beside the price. If the reply gave only a screen diagonal and resolution, I would send it back with a request for the part reference. The buyer could then ask for the documents of that part. I would keep a photograph of the original module in the enquiry, but the returned offer would need to identify what was actually being supplied, including any suffix in its part number.

The mechanical drawing would be one attachment. I would ask it to identify the outside dimensions and thickness separately from the active display area. Newhaven Display's published product pages provide an example of those fields being listed separately. I would not borrow the values of one of its products for another supplier's module. The returned drawing would need to describe the actual offered part, including the location of the display area within the outline and any supplied cover or touch assembly.

I would request a back photograph as well as the front view, and ask the supplier to mark the cable exit on the drawing. If two cable arrangements were offered, I would want a drawing for each with the corresponding part number. A rear photograph of one version would stay with that version's reply. The responsible engineer could then compare the proposed arrangement with the equipment's available space. I would keep the sample cable in its supplied condition, leaving any routing assessment to the engineer and the module's handling requirements.

I would send the returned datasheet to the engineer with the quotation still attached. I would keep the page references for the offered display interface, connector and pin assignment on the handover sheet, asking the supplier to fill in any that were missing. For an offer described as including touch, I would also ask where the touch connection appeared in those documents. I would put the controller or adaptor, if supplied, on the contents list with its own reference. That list would travel with the sample request, so the engineer could identify a board in the parcel without working backwards from an unnamed item in a photograph.

On the sample request I would repeat those supplied-item references and ask for a photograph of the identification on the sample before dispatch. When it arrived, I would photograph its identification again and place the two views in the sample file. That file would accompany the module when it went to the engineer for evaluation against the equipment requirements. For a revised offer, I would ask the supplier to return the old and proposed part references on the same reply and attach the description of what changed. That reply would go back to the engineer with the sample record.

The order would name the accepted part and the agreed drawing and datasheet references. For the receiving file, I would ask the supplier for a photograph showing where its production identification would be found on the module. The packaging label would have a photograph of its own. If a parcel arrived with a label that differed from the sample's, I would take a view of the whole label and another of the module marking, then send those views with the order reference to the supplier. I would ask which supplied part they identified and request the corresponding documentation for the engineer. The receiving record would retain the actual marking while that question was being resolved.