display / touch / bonding solutions
A self-service kiosk is a display with a queue standing in front of it. The screen has to be readable in a bright lobby, precise enough for a gloved hand, robust enough for public use and straightforward enough that a first-time user completes the task without help.
This guide covers the selection decisions behind that result: what size the task needs, how orientation and touch technology interact, what the glass has to survive, and what changes once the kiosk moves outdoors. Kiosk software, payment platforms and content scheduling are separate subjects and are not covered here.
The task determines the screen area, the number of simultaneous touch points and how close the user stands. A ticket machine has to show a list and a payment step; a check-in terminal has to display an identity document and confirm a selection; a restaurant ordering screen has to present enough of a menu to browse; a wayfinding panel has to be legible from a distance before anyone touches it at all.
| Kiosk task | Typical screen size | Touch duty | Reading distance | Public exposure |
|---|---|---|---|---|
| Wayfinding and directory | 32-55 in | Occasional single touch | 1-3 m before interaction | Glass front, heavy contact |
| Ticketing and check-in | 15-22 in | Continuous, repeated, gloved hands | 0.5-1 m | High traffic, deliberate impact |
| Ordering and self-checkout | 15-27 in | Continuous, multi-touch, wet hands | 0.5-0.8 m | Food-safe cleaning, spills |
| Banking and identity | 15-21 in | Precise input, privacy shielding | 0.5-0.8 m | Vandalism risk, camera-attachment risk |
The table is a starting point, not a rule. The useful exercise is to stand at the planned position and try the task on a screen of the proposed size before the enclosure is designed, because both the size and the mounting height are difficult to change afterwards.
Portrait suits content that runs in a list and an interface that presents one decision at a time: a column of destinations, a menu, a check-in flow. Landscape suits content that carries a header and a work area, a map, or side-by-side comparison.
Three practical considerations override preference. The mounting height follows the eye level of the shorter and taller users, which usually favours portrait in a narrow footprint. The enclosure's thermal design follows the orientation, because a tall panel has a longer convection path. And the interface design follows the orientation, because an interface designed in landscape and rotated later almost always has a layout that assumes the wrong reading direction.
Where the kiosk may be deployed in both orientations, the interface should be designed for the narrower dimension first. A layout that works in portrait can usually be widened; the reverse is rarely true.
Almost all new public kiosks use projected capacitive touch, because it supports multi-touch gestures, survives a flush glass front and does not require pressure. The comparison with resistive technology, and the cases where resistive still wins, is set out in PCAP versus resistive touch screens.
For a kiosk the specification questions are about the controller rather than the sensing method: how many simultaneous contacts it reports, how it behaves with a palm resting on the surface, whether it supports a glove mode, and how it handles water. A controller tuned for a phone is not automatically right for a public terminal that is operated through gloves and splashes.
Where the kiosk is expected to handle two users at once, or to support a signature, the requirements change again — contact count, report rate and the size of the active area all need to be agreed with the interface design rather than inherited from a standard part.
Public kiosks are touched, leaned on and occasionally struck. The cover-glass decision covers thickness, edge treatment and coatings, and its interaction with the display beneath it: a thick glass front reduces touch sensitivity unless the controller is specified for it.
Anti-glare treatment is usually the right default for a lobby, because mirror-like reflections of ceiling lights are more disruptive than a slight softening of the image. Bonding the glass to the panel removes the internal air-gap reflections, which improves contrast and keeps dust out of the gap.
Laminated glass adds a safety behaviour that a single pane does not have: it holds fragments together when it breaks, which matters both for user safety and for the kiosk remaining presentable until it is serviced. The approaches used for public terminals are described in laminated safety glass for kiosk displays and their impact behaviour in IK-rated touch glass.
Moving a kiosk outdoors changes four things at once. The brightness requirement rises sharply. The thermal load rises, because the sun heats the front face while the electronics heat the inside. The sealing requirement changes from cleaning-resistant to weather-resistant, including water running down the screen. And the maintenance model changes, because the kiosk can no longer be serviced from a nearby room.
An outdoor kiosk is therefore a different product rather than an indoor one with a canopy. Where a project intends both, the sensible approach is to select the panel and the glass for the outdoor case and simplify for the indoor version, rather than the other way round.
Water and air management at the front face are the design items most often underestimated, and the choices around sealing the screen into the housing are discussed in bezel and waterproofing approaches for kiosk LCDs.
An indoor lobby can still be a difficult lighting environment. Large windows, polished floors and downlights create reflections that a specification based on ambient light level alone will miss. The practical approach is to measure the illuminance at the screen and to look at what is reflected in it at the user's eye position.
Brightness then becomes a compromise with thermal design. A brighter panel produces more heat, and in a closed kiosk that heat has to go somewhere; the enclosure's airflow, the panel's own efficiency and the brightness strategy all contribute. Where the kiosk is in a bright atrium, a modest increase in brightness combined with a good anti-glare treatment is usually more effective than a large increase alone.
The optical principles are covered in sunlight readability by design, and most of them apply indoors as well.
A public kiosk is cleaned frequently, and the cleaning regime decides how long the front surface remains acceptable. Two risks are common: a solvent that attacks the printed border or the coating, and a cloth that leaves a film which then traps dust and becomes visible under the lobby lights.
The specification items are the coating type, the compatibility list for cleaning agents, and the edge treatment. Where the kiosk is used in food service, the cleaning agents are stronger and more frequent, and the guidance on surfaces and materials is set out in hygiene, disinfection and chemical resistance.
Any printed graphics on the front glass should be specified together with the cleaning regime, because a coating that survives daily wiping may not survive a printed border that is wiped with the same cloth.
Three integration decisions are difficult to reverse. The glass-to-bezel interface decides whether the front can be cleaned effectively and whether water can run behind the glass. The panel's mounting lugs and depth decide the enclosure's internal layout, and by extension where the electronics can sit. And the cable route decides how the unit is serviced.
Where the kiosk is a flush front design, the display is usually mounted to a metal frame that carries the glass and the sealing, with the panel itself behind it. That frame is the part that has to be dimensioned accurately, and it is worth designing it with the display's own tolerances in hand rather than from a nominal drawing.
For bar-format strips used for status or branding, the format constraint usually comes from the housing rather than the display, and the available options are listed in the bar type LCD display range.
Before a fleet order, four checks repay the time. Read the interface at the real mounting height in the real lighting. Operate it with the gloves and hands the site will actually present. Clean the front with the site's own cleaning agent. And run the kiosk for a full warm day with the enclosure closed, measuring the temperature at the panel.
The checklist that follows from those checks is short: screen size and orientation confirmed at the site; touch performance verified with gloves, wet hands and a resting palm; glass treatment and cleaning compatibility confirmed; panel temperature measured in the closed enclosure; and a service procedure that does not require removing the kiosk from its position.
If a project is choosing a display for a kiosk, describe the task, the mounting height and the environment, and we will set out which specification items they determine. Kiosk-grade panels are listed in the industrial LCD display range, and custom sizes and formats are covered in the custom LCD display range.
Enough area to complete the task in one or two screens at the intended standing distance. The reliable way to decide is to test the real interface at the real mounting height rather than to choose from a size chart.
Yes, with a controller specified for public use: enough contact reporting, palm handling, a glove mode and water rejection. The sensing method is rarely the limiting factor; the tuning and the firmware are.
Not necessarily, but it does need a realistic brightness and reflection assessment. A bright, glass-fronted lobby can be more demanding than a shaded outdoor position.
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