Touch Screen Displays Monitor Capacitive Touch | Ever Glory

Specifications:

Solutions to Improve Anti-UV Aging Performance for Outdoor Use
1.Front Side: Equipped with AG+AR+UV blocking coating. The coating covers the wavelength range of 300~400 nm, achieving ≥99% ultraviolet cut-off rate and ≥90% visible light transmittance. A base UV barrier film is attached on the back bonding side to fundamentally block ultraviolet rays from penetrating into OCA and polarizer.

2.Adopt high-alumina iron-free ultra-clear glass. Iron impurities contained in conventional soda-lime glass are eliminated to prevent yellowing triggered by iron ion oxidation under ultraviolet catalysis. Common float glass is prohibited for outdoor model applications.

3.UV-resistant silicone sealant together with foam dust strips are applied to the gaps between cover glass and middle frame to block moisture and scattered ultraviolet rays from infiltrating into interlayers via side edges.

4.Replace standard general-purpose OCA with outdoor UV-resistant fully transparent optical adhesive: acrylic-based OCA modified with UV stabilizers blended with HALS (Hindered Amine Light Stabilizers) and UVA (Ultraviolet Absorbers). It blocks UV wavelengths from 320 nm to 400 nm and delivers superior anti-yellowing performance with no obvious discoloration after over 5000 hours of xenon lamp aging (ΔE＜2), whereas conventional OCA turns yellow after only 500 hours of identical xenon lamp testing.

5.Minimize exposed OCA squeeze-out and implement UV edge sealing for residual overflow along edges. Exposed adhesive is most susceptible to UV-induced yellowing and color migration contamination. All uncovered OCA sections are fully covered to avoid exposure to ambient illumination.

6.Complete high-temperature defoaming and secondary curing after lamination to reduce residual monomers inside the OCA. Residual small molecules are extremely susceptible to oxidative yellowing under UV radiation.

Methods to Improve Sealing Performance
1.Add hydrophobic foamed EPDM sealing foam inside the bezel for dual water barrier, solving water ingress caused by negative pressure suction amid day-night temperature fluctuations. Negative pressure formed inside the cavity during cooling draws in moisture, the primary trigger for condensation.

2.A hydrophobic anti-condensation coating is optionally coated on the inner surface of cover glass and top surface of polarizer to lower water surface tension. Trace incoming moisture can hardly aggregate into continuous mist and only forms isolated fine droplets, effectively preventing water stain formation.

3.Adopt reinforced edge-sealed LCD with epoxy sealing plus secondary reinforcement on four sides of liquid crystal cell to replace conventionally simply sealed panels. Economy-grade LCD with tiny edge notches is prohibited for coastal high-humidity and rainy-season applications.

4.Apply moisture-proof three-proof coating (acrylic or polyurethane type) on the LCD rear side and soldered pin areas to stop moisture permeating into the LCD cell via tiny gaps around pins and glass edge seals.

5.Adopt a fully enclosed cavity design for the entire backlight compartment, with a reserved molecular sieve moisture-proof drying chamber equipped with air-permeable desiccant. It absorbs free moisture inside the cavity and traps humid air under negative pressure during temperature drops, effectively suppressing internal condensation.

FAQ
1.Q: Why is the screen less prone to yellowing under long-term outdoor sunlight?
A: The front AG+AR+UV blocking coating cuts over 99% of 300–400 nm UV rays, paired with UV-stabilized outdoor-grade OCA and high-alumina iron-free ultra-clear glass to block UV-induced oxidative yellowing from multiple layers.

2.Q: How does the product avoid water condensation inside in coastal humid & rainy climates?
A: Dual sealing of UV-resistant silicone glue plus hydrophobic EPDM foam, optional hydrophobic anti-condensation coating and built-in desiccant cavity jointly block moisture intrusion and restrain internal condensation from temperature-variation negative pressure.

3.Q: What’s the difference between customized outdoor OCA and regular common OCA?
A: Modified with HALS & UVA UV stabilizers, the special OCA withstands ≥5000h xenon aging with ΔE＜2, while ordinary OCA turns visibly yellow after only 500 hours of aging test.

4.Q: Are cheap float glass and economical notched LCD allowed for outdoor installation?
A: No. Iron-containing float glass and low-cost LCD with edge gaps are forbidden; only iron-free high-alumina cover glass and four-side epoxy reinforced sealed LCD are applied for outdoor models.

5.Q: What measures protect LCD pins and backside from damp damage?
A: Acrylic or polyurethane three-proof insulating paint is coated on LCD back and soldering pin zones to stop moisture seeping into liquid crystal cell via micro gaps of pins and LCD edge seals.

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