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Large Hotel and Supermarket LED Display Selection Guide
In recent years, the adoption of LED displays in indoor environments has been on the rise, especially in large hotels and supermarkets, where they have become a popular choice for advertisers. When it comes to selecting an indoor full-color LED screen for large-scale hotels, several factors need to be considered to ensure optimal performance and visual impact.
Indoor full-color LED screens with an area larger than 5 square meters typically come in three main types: traditional rear-projection, DLP (Digital Light Processing), and LED display systems. Each option has its own set of advantages and limitations.
Rear-projection systems offer high-definition visuals with small pixel sizes, but they suffer from low brightness, limited viewing angles, and short lamp life—usually only a few thousand hours. Plasma splicing also provides good resolution and small pixels, but it suffers from visible seams, even as small as 1mm in modern models. These systems are best suited for close-up viewing.
On the other hand, LED displays offer high brightness, no seams, and are ideal for long-distance viewing. However, their pixel density is generally lower compared to rear-projection or plasma, resulting in coarser image quality. The highest commercial pixel density for indoor full-color LED displays is currently P4, which equates to 62,500 pixels per square meter.
When choosing an indoor LED display, several key factors should be taken into account:
1. **Real vs. Virtual Pixels**: Similar to outdoor LED screens, indoor full-color screens can use real or virtual pixels. Real pixels provide more accurate image representation, while virtual pixels can enhance resolution through software processing.
2. **Die Quality**: For indoor full-color LED displays, it's recommended to use high-quality diodes. Blue and green LEDs often use Shilan Mingxin cores, while red LEDs may use optical Lei or wafer dies. High-end options should consider Japanese Nichia or American CREE chips for better performance.
3. **Package Type**: There are various packaging methods, such as single-lamp, sub-surface mounting, and three-in-one surface mounting. Surface-mount packages offer a wider viewing angle, consistent light output, and are easier for automated soldering. They are now the industry standard, though they tend to be more expensive. Single-lamp and sub-surface mounted options are more budget-friendly and serve as transitional solutions.
4. **Pixel Density**: Due to higher heat generation and denser control circuits, indoor LED displays don’t achieve extremely high pixel densities. Common densities include P5, P6, P7.62, P8, and P10, depending on the intended viewing distance.
5. **Driving Mode**: Indoor LED displays typically use constant current driving with dynamic scanning modes like 1/4 or 1/8 scan. A 1/4-scan mode can produce brighter images under the same die conditions.
By carefully evaluating these aspects, hotel operators can select the most suitable indoor LED display system that meets their specific needs in terms of image quality, brightness, cost, and long-term reliability.