With the rapid development of industrial automation, smart city equipment, and outdoor interactive terminals, displays are increasingly required to operate reliably in complex outdoor environments.
This project was initiated by a customer from South Korea who required a 23.8-inch outdoor HMI (Human Machine Interface) display solution for integration into outdoor equipment.
Due to seasonal temperature changes and continuous exposure to direct sunlight, the display needed to achieve:
Most commercial LCD displays are designed for indoor environments, with typical brightness levels around 300–500 nits.
When exposed to direct sunlight, conventional displays often suffer from:
| Environment | Display Performance |
|---|---|
| Indoor environment | Clear visibility |
| Outdoor cloudy conditions | Acceptable readability |
| Strong sunlight exposure | Reflection, low contrast, poor visibility |
Therefore, the customer required a true:
Outdoor equipment can absorb significant solar heat during continuous operation.
Excessive temperature rise may cause:
| Heat Impact | Potential Issue |
|---|---|
| High backlight load | Reduced LED lifetime |
| LCD temperature changes | Display performance instability |
| Internal heat accumulation | System reliability issues |
| Component aging acceleration | Shortened product lifetime |
A comprehensive thermal management solution was required to improve long-term reliability.
Outdoor equipment in Korea experiences significant seasonal temperature variations:
The display solution needed to maintain stable performance throughout the year.
Based on the customer's application requirements, we developed a customized:
| Item | Specification |
|---|---|
| Display Size | 23.8 Inch |
| Resolution | 1920 × 1080 Full HD |
| Display Technology | IPS TFT LCD |
| Brightness | 2000 nits |
| Cover Glass | Customized Cover Glass |
| Optical Technology | OCR Optical Bonding |
| Thermal Solution | Infrared Heat Insulation Film |
| Application | Outdoor HMI Equipment |
To overcome strong outdoor sunlight conditions, the display adopts an ultra-high brightness backlight solution reaching:
Compared with standard commercial displays:
| Comparison | Standard LCD | Customized Solution |
|---|---|---|
| Brightness | 300–500 nits | 2000 nits |
| Application | Indoor environment | Outdoor sunlight |
| Sunlight readability | Limited | Excellent |
| All-weather operation | Not suitable | Supported |
✓ Sunlight readable performance
✓ Improved user experience
✓ Enhanced information visibility
✓ Suitable for outdoor continuous operation
To improve outdoor display performance, the LCD panel and cover glass are integrated using:
Traditional display structure:
Cover Glass
↓
Air Gap
↓
LCD PanelOptimized structure:
Cover Glass
↓
OCR Optical Resin
↓
LCD Panel| Advantage | Benefit |
|---|---|
| Reduced internal reflection | Better outdoor visibility |
| Higher light transmission | Clearer images |
| Improved contrast | Better sunlight performance |
| Enhanced mechanical strength | Higher reliability |
| Reduced condensation risk | Better environmental protection |
Outdoor displays face a hidden challenge:
To reduce thermal impact, an:
was integrated into the cover glass structure.
| Function | Effect |
|---|---|
| Blocks infrared radiation | Reduces solar heat absorption |
| Lowers internal temperature | Improves thermal conditions |
| Enhances stability | Reduces high-temperature failures |
| Extends service life | Protects display components |
This technology is especially valuable for outdoor HMI applications where thermal control directly affects system reliability.
Considering outdoor operating conditions, this display solution was designed with industrial-grade reliability requirements.
Key capabilities include:
✓ Stable operation under high temperatures
✓ Reliable performance in low temperatures
✓ Long-term continuous operation
✓ Adaptability to outdoor environments
This solution can be widely applied in:
| Application | Typical Equipment |
|---|---|
| Outdoor Industrial HMI | Automation control terminals |
| Smart City Equipment | Information terminals |
| EV Charging Stations | Charging displays |
| Self-Service Equipment | Outdoor kiosks |
| Transportation Systems | Interactive display devices |
The project is currently in the:
The customer is performing:
| Test Item | Purpose |
|---|---|
| Sunlight readability testing | Verify outdoor visibility |
| Thermal performance testing | Evaluate heat management |
| Environmental reliability testing | Verify long-term stability |
| System integration testing | Confirm compatibility with equipment |
After successful validation, the project is expected to move into mass production.
By combining:
✅ 23.8-inch Full HD IPS Display
✅ 2000 nits Ultra-High Brightness Backlight
✅ Customized Cover Glass
✅ OCR Optical Bonding Technology
✅ Infrared Heat Insulation Film
✅ Wide Temperature Industrial Design
we successfully developed a reliable outdoor HMI display solution for the Korean customer's application.
The solution effectively addresses key outdoor display challenges:
while improving overall user experience and equipment lifetime.
We provide professional industrial LCD solutions for various outdoor applications:
Our capabilities include:
✓ High brightness LCD customization
✓ Optical bonding solutions
✓ Customized cover glass design
✓ Wide temperature display solutions
✓ Industrial reliability testing
From display design to mass production support, we provide complete display solutions tailored to customer applications.