I. Introduction
1.1 Technical background
The color wall screen to be studied in this paper has been successfully applied to the wall of the Jade Pearl Ballroom Bar in Shenzhen Xindu Hotel, which constitutes a refreshing and visually stunning indoor display curtain wall. The practical application effect of the project has reached the customer's requirements - novel, environmentally friendly, colorful and colorful, reflecting the characteristics of the high-grade DISCO bar. The color wall screen solution is based on the application and control technology of LEDs, precisely because LEDs have unparalleled advantages over other light sources. LED (Light-Emitting-Diode) is a semiconductor that converts electrical energy into visible light. Its characteristics are as follows:
1 high efficiency: according to the usual definition of light efficiency, LED luminous efficiency is not high (generally 10-30lm / W, currently known as the highest efficiency of orange-red LED Light can reach 55lm / W), but due to the spectrum of LED Almost all of them are concentrated in the visible light range, and the efficiency can reach 80-90%, while the incandescent lamp with similar light efficiency has a visible light efficiency of only 10-20%.
2 high light quality: because there is no ultraviolet and infrared rays in the spectrum, there is no heat, no radiation, LED is a typical green lighting source.
3 light color purity: Unlike the full-band spectrum of incandescent lamps, the typical LED spectrum is narrow and the light emitted is pure.
4 low energy consumption: the power of single LED is generally 0.05-1W, which can be tailored to meet different needs through clustering, with little waste. Especially when color light is needed, the use of white light through the filter color is costly and wastes energy, and the inherent color of the LED is unique.
5 Long life: The luminous flux is attenuated to 70% of the nominal life of 100,000 hours. It's actually almost limitless.
6 Reliable and durable: There are no parts that are easily damaged by tungsten wire, glass bulb, etc., the possibility of abnormal scrap is small, and the maintenance cost is extremely low.
7 Flexible application: small size, can be developed into a light and thin short product, and can be made into various application forms of points, lines and surfaces.
8 Safety: The working voltage of the single unit is roughly between 1.5V and 5V, and the working current is between 20mA and 70mA.
9 short response time: suitable for frequent switching and high frequency operation.
10 Green: The waste can be recycled without pollution; unlike fluorescent lamps, which contain mercury.
Flexible control: Dimming can be adjusted by adjusting the current. The combination of different light colors can be toned, and the timing control circuit can achieve various dynamic changes.
These advantages make LEDs an ideal green light source that has been increasingly used in engineering lighting and display applications. The application of semiconductor technology in urban night lighting projects and interior lighting and display engineering projects gives people a new feeling: for example, in the performance of color, lighting control, environmental protection and energy saving, it is better than traditional neon lights. , incandescent lamps, tungsten halogen lamps, etc. have advantages. Shenzhen Xindu Hotel Emerald Pearl Ballroom DISCO Bar indoor color display curtain wall project combines the application of LED lighting technology and display technology, and uses the "bulb" pixel combination to construct a dynamic display wall that can be changed ever.
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