Colagem a ar vs colagem óptica: qual serve o seu produto?
Comparação da laminação: contraste sob sol, embaçamento, resistência a impactos, retrabalho e custo — com 17 modelos ópticos e 38 a ar já no catálogo.Two Ways to Stack Glass: Air Gap vs Direct Bonding
Every touch-equipped display is a sandwich: LCD cell on the bottom, cover glass or touch sensor on top. The question is how the two layers meet.
- Air bonding (frame bonding): the cover glass is attached around the border with frame adhesive or double-sided tape. A thin layer of air remains between glass and cell — cheap, proven, and easy to service.
- Optical bonding: a liquid optically clear adhesive (LOCA) or optically clear adhesive film (OCA) fills the entire gap between cell and glass, cured into a solid, transparent layer.
Why the gap matters: at every air-to-glass interface, roughly 4% of light reflects (Fresnel loss at normal incidence). An air-bonded stack adds two extra interfaces — glass-to-air and air-to-cell — so ambient light bounces inside the module twice more before it reaches your eyes. That reflected light is exactly what washes out an outdoor display, no matter how bright the backlight is.
What Optical Bonding Buys You
- Outdoor contrast. Removing the internal air gap eliminates the dominant reflections, so a bonded module recovers a large share of its contrast in direct sunlight — often the difference between a 1000-nit panel that is readable and one that is not. The brightness math lives in our sunlight-readable guide.
- No internal fogging. The sealed adhesive layer leaves no cavity for condensation, which matters in humid, temperature-cycling environments: cold chain, outdoor kiosks, vehicle bays.
- Shock and vibration resistance. The cured adhesive cushions the glass and distributes impact, improving drop and vibration survival for handheld and vehicle-mounted devices.
- Optical clarity and parallax. Matching refractive indices across the stack reduces internal glare and parallax, so the readout looks crisper at any angle.
What Air Bonding Buys You
Air bonding is not a compromise — for many products it is the correct engineering answer:
- Lower unit cost and a simpler, faster process — no adhesive dispensing and cure step in the line.
- Easier rework. The cover glass can be separated and re-bonded if a sensor fails or a housing revision changes the glass — practical for early production and service-friendly products.
- Fine indoors. For controlled lighting (POS, instruments, wall thermostats), the air-gap contrast penalty rarely matters.
Our rule of thumb: indoor and cost-driven projects stay air-bonded; anything that faces sunlight, condensation or shock justifies optical bonding.
Side-by-Side Comparison
| Criterion | Air bonding | Optical bonding |
|---|---|---|
| Contrast in sunlight | Reduced by internal reflections | Clearly better — gap reflections eliminated |
| Internal fogging | Possible in the air cavity | Eliminated |
| Shock / vibration | Standard | Improved — adhesive cushions glass |
| Parallax and glare | Visible | Reduced |
| Rework of cover glass | Easy | Difficult |
| Unit cost | Lower | Higher |
Bonded Modules Already in the Catalog — Zero NRE
You do not need a custom project to get factory bonding: of our 193 standard models, 55 ship bonded from the line — 17 with optical bonding and 38 with air bonding — and 35 models in total carry factory-bonded PCAP touch. Representative optical-bonded parts:
| P/N | Size | Resolution | Brightness | Touch | Interface |
|---|---|---|---|---|---|
| DS-T043BPSA-02CP | 4.3″ | 480×272 | 850 cd/m² | CTP | RGB 24-bit, 40-pin |
| DS-T043BWSA-02CP | 4.3″ | 800×480 | 800 cd/m² | CTP | RGB 24-bit, 40-pin |
| DS-T050BWSA-02CP | 5.0″ | 800×480 | 700 cd/m² | CTP | RGB 24-bit, 40-pin |
| DS-T101HIEWA-01CP | 10.1″ | 1280×800 | 850 cd/m² | CTP | LVDS 6/8-bit, 40-pin |
If your brightness target exceeds what a bonded catalog part delivers, the usual route is a high-brightness bare panel from our 23 models at 1000 cd/m² or more, with optical bonding added as an ODM step.
Bonding as an ODM Option — and How to Get a Quote
In an ODM engagement, bonding is one customization axis alongside outline shape, mechanical fit, driver board and brightness — the same project that opens tooling for a shaped glass typically also selects the bonding method. The anchors our ODM line works to: feasibility and NRE quotation within 2 business days of your inquiry; NRE for shaped or structurally modified projects typically USD 4,800–7,500; standard samples in 5–7 working days, EVT in 6–8 weeks for tooled projects; mass production in 18–25 working days with 96.5% on-time delivery; MOQ 500 pcs, with batches under 500 carrying a +15% premium so pilot runs of 100–300 units stay practical.
All of it happens inside our own plant in Zhaoqing (Guangdong) — 23,700 m² of floor area, a 72-engineer R&D team, and a quality system certified to IATF 16949:2016 including product design and ISO 13485:2016, so bonding processes run under the same design-controls discipline as the rest of the build. Process detail lives on our ODM process page; shape customization is covered in the custom shape guide and the application view sits on our custom ODM solutions page.
Not sure which lamination your environment needs? Email [email protected] with the mounting environment and brightness target — we will recommend air or optical bonding with a part number and a quote.
Modelos padrão DISEA correspondentes
Estes números de peça do nosso catálogo correspondem a este guia — cada um é um modelo padrão com especificações completas e pedido de folha em um clique:
- DS-T035QHI-03CP — 3.5″ 320x480 IPS, 300 cd/m²
- DS-T035GLH-01CA — 3.5″ 320x240 TN, 280 cd/m²
- DS-T035GLH-02CA — 3.5″ 320x240 TN, 700 cd/m²
- DS-T035HLS-01CP — 3.5″ 320x240 IPS, 300 cd/m²
- DS-T035SGV-01CP — 3.5″ 640x480 IPS, 320 cd/m²
- DS-T0397BVSA-02CP — 3.97″ 480x800 IPS, 350 cd/m²
- DS-T043QPS-02CA — 4.3″ 480x272 TN, 800 cd/m²
- DS-T043BPSA-01CA — 4.3″ 480x272 IPS, 400 cd/m²