Faced with a seemingly very simple dimming function, the modern 3G, 4G, and cloud computing generations of the electronics industry are at a loss. The popular media darling - the smart grid - is completely powerless to control lighting. This inevitably makes people doubt that the concept of the entire smart grid is purely a hype bubble. Most electronics engineers are equally confused. Why do we have to rely on an old component, SCR silicon control, when it comes to lighting dimming? Is it really so difficult to design a dimming function? In fact, the difficulty lies in the cost of the device and the uncertainty of the market. If you can analyze the advantages and disadvantages of silicon-controlled dimmers and the cost of other dimming schemes, many confusions will be clarified. 1. Lighting demand benchmark Moderate lighting has a significant impact on the competitiveness of the store. Convenience stores, department stores, key counters on the first floor, including cosmetics, jewelry, and illuminance are super. If the 2000Lux is insufficient, it will not attract attention and purchase desire. If the lighting is not enough, it will increase the fatigue and drowsiness of the staff. Table 1 Benchmarks for lighting in each location Mini PC Office
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This article analyzes the existing dimming scheme. And make a few bold predictions:
(1) Silicon-controlled dimmers will go into history with incandescent lamps
(2) There is no market prospect for electronic dimmers and remote dimmers.
(3) EZ Dimming is the only universally viable dimming solution that will also become the ubiquitous dimming method.
Let us first understand the relationship between the benchmark of lighting demand and dimming energy. The lighting design must take into account the intensity of the light source and the luminous flux obtained from the illuminated object or the illuminated surface. The unit of measure for the intensity of the light source is Lumen. The unit of measurement for illuminance is Lux. The relationship between the two is 1 Lux = 1 Lumen/m2
Suppose we have a 10W LED desk lamp and the total luminous flux emitted is 600 Lumens. If the 600 Lumens are all concentrated on a square meter of desktop, the illuminance of the desktop is 600 Lux.
(1) Commercial lighting – bright foods, especially bread, burgers, seafood, barbecues, etc. can stimulate appetite. Therefore, the bread cake shop, the fast food restaurant in Hamburg, and the window of the restaurant should have an illumination of more than 1000 Lux. Jewelry, watches, and clothing stores must also have bright illumination to stimulate purchase. Precision industrial, color printing, museums, galleries, optical shops, 3C stores, bookstores, typing, cartography, and clinics all have 1000 Lux illumination.
(2) General lighting – office, classroom, mass merchandiser, general store, coffee shop, fast food restaurant, factory, production line, there must be 300-800 Lux.
(3) Non-workplaces – such as stations, airports, hospitals, building halls, wards, corridors, stairwells, toilets, 100-300 Lux. Parks, parking lots, and streets can be as low as 10-50 Lux.
(4) Non-business hours – Commercial lighting and general lighting can be reduced to 100-300 Lux during non-business hours.