Specifications:
| Transmittance |
＞85% |
| Pixels H×V |
1920 x 3(RGB) x 1080 |
| Pixel Pitch |
0.17925x 0.17925mm |
| Support Color |
16.7M Colors ( RGB 8-bits ) |
| Contrast Ratio |
1000 Typ. |
| Viewing Angle |
89 Typ. |
| Display Surface Treatment |
Anti-glare 3H |
| Touch Response Time |
≤25ms |
| Touch Report Rate |
≥100Hz |
| Controller Supply Voltage |
USB 5V Typ.V |
| Controller Interface |
USB Typ. |
| Support Touch Points |
10 points Typ. |
| Impact resistance |
≥IK07 |
| Cover surface hardness |
≥6H |
1.Adopt IP67-rated, wide-temperature-resistant and anti-aging ePTFE expanded PTFE waterproof and breathable vents. These vents allow air permeation while blocking water and dust, achieving real-time dynamic pressure balance between the inside and outside of the equipment cavity. They eliminate alternating stress caused by positive pressure extrusion and negative pressure tension, fundamentally preventing long-term cyclic pressure damage to sealants and OCA optical clear adhesives.
2.Implement sealing and waterproof treatment for the mounting holes with matching silicone O-rings to prevent water infiltration and air leakage at the installation position of the breathable vents.
3.It is prohibited to install the breathable vent inside the narrow enclosed compartment of the screen backlight cavity. Ensure the vent is connected to the air path of the main equipment cavity to achieve full-range air pressure balance.
4.High and low temperature resistant, highly elastic silicone rubber sealant or silicone foam sealing sponge shall be adopted for shell joints, with an elongation rate of no less than 300%. It can adapt to tiny deformation caused by thermal expansion and contraction, resist repeated tension generated by pressure difference, and is not prone to embrittlement and cracking.
5.Adopt a continuous closed-loop glue dispensing process to eliminate breakpoints, insufficient glue and thin glue areas. Ensure uniform glue width and adhesive layer thickness for even stress distribution during deformation, so as to avoid adhesive cracking caused by local stress concentration. Conduct plasma degreasing and cleaning on bonding surfaces before sealing to improve adhesive adhesion and prevent air leakage resulting from adhesive peeling.
6.Design micro-deformation buffer ribs on the housing and reserve allowance for deformation caused by thermal expansion and contraction. This prevents excessively rigid housing from concentrating all thermal deformation stress on the sealing adhesive under temperature changes. The touch screen adopts a recessed mounting structure to avoid uneven sealing stress resulting from screen extrusion on the housing.
7.Adopt highly extensible, high-adhesion and temperature-aging-resistant OCA adhesive, which can withstand interfacial stress induced by slight cavity pressure fluctuations and prevent bubble generation and delamination caused by repeated tension from pressure difference. Civil-grade OCA adhesive with low ductility is prohibited, as interfacial peeling and bubbling tend to occur easily under alternating high and low temperature environments.
8.High-temperature and high-pressure defoaming treatment shall be carried out after lamination to thoroughly eliminate invisible micro-scale tiny bubbles at the bonding interface. These micro bubbles will keep expanding under cyclic pressure difference, eventually developing into large visible bubbles and resulting in layer delamination. All operations shall be performed in a clean workshop to prevent dust and impurities from remaining on the bonding interface and forming stress concentration points.
How to Improve the Anti-False Touch Performance of Touch Screens for Outdoor Applications1.
Replace consumer-grade touch chips with industrial wide-temperature touch ICs natively embedded with three core dedicated algorithms, featuring an operating temperature range of -40℃ to +85℃. The chip manufacturer preconfigures multiple sets of parameter profiles for high temperature, low temperature, humid conditions and strong interference scenarios. Abnormal signal filtering is realized at the hardware bottom layer instead of relying on simple fine-tuning of software parameters.
2.Equip with double-layer shielded and grounded FPC, independent analog power LDO and π-type power filter circuit. Combined with the chip’s differential sampling architecture, the signal-to-noise ratio is improved to supply clean original touch sampling signals for various dedicated algorithms, preventing valid touch signals from being submerged by noise and resulting in algorithm failure.
3.Adopt full OCA lamination process for the touch screen to reduce the transmission loss of the touch electric field, enhance the strength of valid touch signals under wet-hand, high-temperature and strong interference environments, and ensure the stable operation of various filtering and compensation algorithms.
4.Disable the fixed static baseline mode adopted in consumer-grade products and enable real-time dynamic baseline calibration across the full temperature range. Based on NTC temperature data collected around the IC, the system automatically corrects the capacitance reference baseline in segments to counteract baseline drift caused by impedance temperature drift of ITO and FPC under high temperatures ranging from 60℃ to 75℃ as well as low-temperature conditions, eliminating touch drift at high temperatures and frequent calibration prompt failures.
5.Enable hardware-level differential signal sampling, together with multi-stage moving average filtering, median filtering and time-domain anti-jitter filtering. It continuously samples and filters high-frequency electromagnetic clutter, eliminates false touch points generated by radiation and conduction interference from high-voltage equipment, and solves the problem of automatic random clicks without manual operation.
6.Enable the frequency hopping scanning algorithm, which allows the touch sampling frequency band to automatically avoid interference bands generated by on-site inverters and switching power supplies, fundamentally eliminating single-point touch failure and coordinate drift caused by co-frequency interference.
7.Activate the water film suppression mode by increasing the effective touch area and capacitance trigger threshold. The system can distinguish stable finger presses from weak conductive signals generated by water droplets and water films, filtering multi-point false touches and touch disconnection faults triggered by large-area conductive layers formed by raindrops or wet hands.
FAQ
1.Q: Why does the touch screen suffer from frequent false touches when used outdoors on rainy days?
A: The main causes include surface water film interference, insufficient anti-interference capability of consumer touch chips and lack of water suppression algorithms. Our solution adopts industrial wide-temperature touch IC with built-in water film suppression mode, which can filter weak conductive signals of raindrops and water layers to avoid multi-point mis-triggering.
2.Q: Will high temperature in summer lead to touch coordinate drift and frequent calibration prompts?
A: Yes. High ambient temperature causes impedance drift of ITO and FPC, resulting in baseline offset. We disable static baseline mode and enable full-temperature dynamic baseline real-time calibration combined with NTC temperature sensing to automatically correct reference values and eliminate high-temperature touch drift.
3.Q: How to avoid touch failure caused by electromagnetic interference from inverters and switching power supplies on site?
A: Our scheme adopts frequency hopping scanning algorithm to automatically evade interference frequency bands, paired with hardware differential sampling and multi-stage filtering. Meanwhile, double-layer shielded grounded FPC and π-type power filter circuit are used to suppress conducted and radiated interference at the hardware level.
4.Q: Why can ordinary touch screens easily generate false clicks under strong electromagnetic interference?
A: Consumer-grade touch solutions only rely on simple software parameter adjustment with weak noise filtering ability. We use industrial touch IC with three built-in dedicated algorithms, matched with independent LDO power supply and multi-level filtering technology to shield clutter and prevent noise from submerging effective touch signals.
5.Q: How does the OCA full lamination process help improve outdoor anti-false touch performance?
A: Full OCA bonding reduces the transmission loss of the touch electric field, strengthens valid touch signals under high temperature, wet and strong interference conditions, ensuring that various anti-interference and compensation algorithms can operate stably and effectively filter invalid touch signals.
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