February 20, 2021
Most people pick a screen by browsing a catalogue and then going back to reshape the enclosure. Working the other way round — starting from what the enclosure can give — removes an entire round of mechanical rework.
Most people pick a screen by browsing a catalogue, choosing something close enough, then going back to reshape the enclosure. As the enclosure changes, it turns out the flex cable cannot exit, the assembly posture is awkward, or the viewing area is a ring smaller than expected. Starting from the enclosure instead is less efficient only in appearance: it removes a full round of mechanical rework.
The size of a display is never an isolated parameter. Viewing area, module outline and connector position together determine whether it fits the product, and all three are constrained by the enclosure. Starting from the enclosure takes one fewer exploratory loop than starting from the screen, and that is where non-standard customisation genuinely saves time.
First, the target enclosure size and assembly space — ideally a range rather than a number, because assembly clearance usually has a few millimetres of tolerance. Second, the content to be displayed: character, graphic or colour, roughly how many rows and how many elements; this has the largest influence on glass and driver selection. Third, the installation direction, meaning which angle the screen is viewed from once installed; the wrong viewing choice greys the display from some angles. Fourth, the supply and interface conditions: what interfaces the host can provide, what voltage, how many pins are available.
With those four stated plainly, the matching can be done in one pass. The rest — glass size and viewing area, driver IC selection, FPC length and pin definition, backlight configuration, coating and viewing direction — falls to the supplier. You do not need to become a display expert before commissioning a custom screen; you need to state your constraints clearly.
A module proposal matched to your finished device, usually including: glass and module dimensions with viewing area, the recommended driver IC and interface type, FPC specification and cable exit direction, backlight and colour configuration, the temperature grade and viewing direction, and the mask or tooling lead time for the non-standard portion. The proposal is aligned to your assembly space rather than leaving you to convert units yourself.
Our process takes the enclosure dimensions and display requirements and returns a solution and quotation within twenty-four hours. Customisation covers interface, logic voltage, FPC length, pin definition, cover lens and backlight colour; parameters are typical catalogue values and customisation follows your design. In other words, what you receive is a proposal for your product rather than a limited-choice list.
Some teams worry that handing over dimensions locks them in. In fact a matching proposal usually comes with one or two options and the trade-offs attached — two millimetres thinner but one grade less backlight brightness, or an FPC that saves space at the cost of one extra assembly step. Which one to take is your call based on product positioning. Customisation is not a single fixed decision; it is putting the choices in front of you.
If all you have is a rough idea, that can be discussed too. Send the product type, the approximate content to display and the internal space, and let the other side judge whether standard product or customisation is the right route, and the likely cost and lead time. Often one hour of conversation saves two weeks of trial and error. We supply both custom displays and modules and provides market and localisation support, so the display side of a hardware team's global launch can be sorted out in one place.
Custom is not automatically the better answer. If the volume is small, the schedule is tight, or the display is a minor part of the product, a standard module with a well-made bracket is the sensible engineering choice. The line usually falls at a few thousand units and a stable product: below that, custom tooling rarely pays for itself; above it, the savings on BOM and assembly time start to matter. A supplier that quotes custom in every conversation is not advising, it is selling.
The other case for standard is continuity. If the product will be serviced for years, a widely stocked module means a field replacement does not require a reprint of the bezel. We recommend standard modules where the numbers support it and says so plainly — the custom option stays on the table, but the recommendation follows the volume and the schedule rather than the margin on the order.
There are two paths in display selection. Forward from the module: look through the catalogue, then make the product fit. Backwards from the housing: fix the assembly boundary, then match the display. The first is convenient and leaves the product compromised everywhere; the second costs a little more conversation and keeps the design whole. Mature teams mostly take the second.
Working backwards needs little: the internal dimensions of the housing, assembly depth, the target viewing area, the volume of content to display, and the supply and interface conditions. With those, the supplier can return a matched set of glass size, driver IC, FPC length and pin definition rather than a catalogue to choose from.
For small-batch projects the path suits well because it concentrates uncertainty before quotation. A custom module takes longer to develop than a standard one, but the total time for one correct attempt is often shorter than restructuring around a standard part and running the round again.
The enclosure drawing fixes the glass, but three other interfaces decide whether the module actually assembles. The first is the FPC. A custom FPC LCD module is specified by bend radius, stiffener length, connector position and pin assignment, and each of those is a tooling item: change the connector from a 0.5 mm pitch ZIF to a 1.0 mm board-to-board and the artwork is redone. Send the mating connector part number with the drawing, not just the pin count.
The second is the air gap. An optical bonding LCD module fills the space between the cover glass and the panel with an optically clear adhesive instead of air. That removes two internal reflections, which is what makes a display readable in direct sunlight at a given brightness, and it also stops condensation between the layers in a cold enclosure. It costs more and it is harder to rework, so it belongs on outdoor and medical units rather than on every build.
The third is the glass outline itself. A monochrome graphic LCD in a custom size is not cut from a standard sheet — the glass mask is drawn for that outline, which means the active area, the border and the seal line all move together. That is why an enclosure change late in a project is expensive: it is not the plastic that costs, it is the mask behind the glass.
Tell us your project scenario and requirements, and we will match the right solution and provide a quote within 24 hours.
Get a Free QuoteCOG and COB character and graphic LCDs, PMOLED/AMOLED microdisplays, 0.69–10.1 inch TFT colour panels and LED backlight modules across six product families and 61 standard models. Non-standard sizes, resolutions, interfaces, viewing directions and FPC layouts developed to drawing; standard, industrial and wide-temperature grades; supplied to RoHS, REACH and CE with full compliance documentation and a 12-month warranty that can be extended per project.
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