CHUANGDI TECHNOLOGY
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2026
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01
Injection-Molded Optoelectronic Signs or Traditional Optoelectronic Signs: What Are the Key Differences?
Tunnels have long been a "visual blind spot disaster zone" for traffic: Traditional reflective signs rely on vehicle headlight reflection, so visibility drops to less than 30 meters in dim light. Early traditional optoelectronic signs, meanwhile, are bulky and thick—they take up too much space, and installation or maintenance often takes hours of tedious work.
To help you figure out exactly how the new generation of products stands out from conventional options, we’re conducting a head-to-head comparison between injection-molded optoelectronic signs and traditional ones, breaking down their core differences and unique advantages in detail.
"Thin, Light, Transparent": A Physical Overhaul That Beats Traditional Models
The biggest flaws of traditional optoelectronic signs are their bulk and poor space efficiency: They’re usually 25-30mm thick, weigh around 3.5kg for the same size, and have only 75% light transmittance—so they look clunky when installed in narrow tunnel wall spaces.
Chuangdi’s new injection-molded signs solve these issues with material innovation: Their engineering plastic alloy frames withstand extreme tunnel temperature swings (from -40°C to 70°C), while thickness is cut to just 12mm (half that of traditional models) and weight is reduced by 29% (around 2.5kg for the same size).
Paired with high-brightness SMD LEDs and reflective film technology, light transmittance reaches 90%—so light passes through the panel clearly without glare at night.
Functional Upgrades: From "Passive Display" to "Active Protection"
Traditional optoelectronic signs only serve a basic "lighting up" function, but Chuangdi’s injection-molded signs fully meet the rigorous safety needs of tunnel scenarios:
Doubled Maintenance Efficiency: Equipped with an external AC/DC power supply and adjustable bracket, replacing the power source used to require dismantling the entire traditional sign—now it only takes tightening two screws.
Real-Time Status Monitoring: Built-in voltage and current detection modules let tunnel control centers track operation data remotely, eliminating the need for time-consuming manual checks of each traditional sign.
Flexible Scenario Adaptation: Two versions are available: reflective film type (active + passive illumination) and light panel type (pure active illumination). For example, emergency phone signs use the reflective film version, which still works via vehicle headlight reflection if power is cut—this reliability is far beyond what basic traditional optoelectronic signs can offer, perfectly fitting tunnels’ "24/7 reliability" core requirement.
If you want to learn more about how injection-molded optoelectronic signs can optimize your tunnel safety system, feel free to contact us.
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Traditional tunnel signs suffer poor visibility and bulkiness, solved by Chuangdi’s thin, light, transparent injection-molded ones with temperature resistance. They provide active protection, with efficient maintenance, real-time monitoring and adaptive illumination for 24/7 tunnel reliability.