digital lighting. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Lighting
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Nowadays, digital methods are being introduced into the most unexpected areas of application [1].
With digital lighting, as well as with the control of jet engines, it is undesirable to unbalance the luminous flux when switching the brightness of light sources. This creates the effect of a shadowless lamp (as in surgery), and the more lamps are turned on, the more the shadows are blurred. There are other benefits of digital lighting:
1. The consumed electrical power (as well as the luminous flux) varies discretely. The user can choose the optimal level for himself, which will really save energy.
2. A "multi-tube" illuminator is very tenacious, it is unlikely that all the bulbs will burn out, in any case, the procedure for replacing burned-out bulbs can always be postponed until daylight hours.
3. The problem of storing spare bulbs is solved, since they can be interchanged in the lamp.
4. You can solve the problem of "soft" inclusion of light bulbs in the network, first turning on one light bulb, with its heat it warms up the rest, preparing them for switching on.
5. With all the switching of the brightness of the digital lighting head, the spectral composition of the light does not change (this is exactly what happens with thyristor brightness control).
The figure shows the principle of digital lighting with different bit depths of digital control devices (from 1 to 8 bits). The main thing is that when the brightness of the digital illuminator is increased, the bulbs light up starting from the center. This makes sense for multi-bit control. With a small number of discharges, it is better to be guided by the principles set forth in [2, 3].
(click to enlarge)
With the advent of ultra-bright LEDs, a real revolution will occur in lighting technology. LEDs are perfectly combined with digital electronics. Their use is still limited by a high price, but this will pass with time.
And this revolution will end with the fact that the incandescent light bulb will pass into the category of museum values. On the shelves of stores will show off LED lamps controlled by microprocessors. They will be of various shapes and sizes, with any radiation power (at least up to 1000 W), with any spectral composition of the radiation, and most importantly - very economical.
Even light sources such as fluorescent lamps can be converted to digital control methods.
In my opinion, such light sources will be expensive, complex and unreliable.
References:
- Sarazh Yu.P. digital lighting. Sconce (console lamp)//Electrician. - 2002. - No. 11. - P.20-21.
- Sarazh Yu.P. Game indication "Domino"//Electric. - 2002. - No. 6, 7. - P. 20, 21.
- Sarazh Yu.P. Game indication "Cards"//Electric. - 2002. - No. 9. P.20.
Author: Yu.P. Sarazha
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