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Large Hotel and Supermarket LED Display Selection Guide
At present, an increasing number of LED displays are being integrated into indoor environments, especially in large hotels and supermarkets, where they have become a popular choice for advertisers. When it comes to the use of indoor full-color LED screens in large-scale hotels, there are several key factors that need to be considered.
In an indoor setting, large full-color electronic displays with an area exceeding 5 square meters typically come in three main types: standard rear projection, DLP (Digital Light Processing), and LED displays. Each has its own set of advantages and disadvantages depending on the application.
Rear projection systems offer high-definition visuals with small pixel sizes, but they suffer from low brightness, limited viewing angles, and short lamp life—often only a few thousand hours. Plasma splicing also provides good resolution and small pixels, but it can result in visible seams, with the smallest gap currently reaching 1mm. Both rear projection and plasma displays are best suited for closer viewing distances.
LED displays, on the other hand, provide high brightness and seamless visuals, making them ideal for larger spaces or areas where viewers are farther away. However, their pixel density is generally lower compared to other technologies, resulting in coarser visuals. The highest pixel density available in commercial indoor full-color LED displays is P4, which equates to 62,500 pixels per square meter.
When selecting 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 displays also feature real and virtual pixels. Real pixels provide more accurate color representation, while virtual pixels help increase resolution without adding more physical components.
2. **Die Quality**: For indoor full-color LED screens, it's recommended to use high-quality chips. Blue and green LEDs often use Shilan Mingxin cores, while red LEDs may use optical Lei or wafer dies. Premium options typically use Nichia (Japan) or CREE (USA) chips for better performance.
3. **Package Type**: Indoor full-color LED displays come in various package forms, such as single lamp, sub-surface mount, three-in-one surface mount, and others. Surface mount packages offer a wide viewing angle, consistent light output, and easier automation during manufacturing. They are the mainstream option, though they tend to be more expensive. Single-lamp and sub-surface mounted versions are cheaper and serve as transitional products, but they have smaller viewing angles and slightly lower brightness.
4. **Dot Density**: Due to higher heat generation and denser control circuits, indoor full-color LED screens cannot achieve extremely high pixel densities. Common options include P5, P6, P7.62, P8, and P10, which strike a balance between image quality and practicality.
5. **Drive Mode**: Indoor full-color LED displays typically use constant current drive with dynamic scanning (such as 1/4 or 1/8 scan modes). A 1/4-scan mode tends to produce brighter images under the same die conditions, making it a preferred choice for certain applications.
By carefully evaluating these aspects, hotel operators and advertisers can make informed decisions when choosing the most suitable indoor full-color LED display for their specific needs.