嗯嗯不要好大太紧了:Parlor Article Lighting chapter--Table lamp

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[Concept]
1. [Desk lamp; table lamp]: can be placed on a flat bench seat of lights, with a shade more
2. [Reading lamp]: designed for the reading lamp with the lamp or the
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[History]
    IngoMaurer was born in 1931, the German designer. Large and small design magazines seem to have to mention the "light of the poet."
    Almost no doubt IngoMaurer is the world's light (light) into the most effort and wisdom of the designer.
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[Works]
       220V power supply voltage through the step-down transformer T 12V AC output voltage, the diode VD1 ~ VD4 rectifier, filter capacitor C1, by the LM317 adjustable voltage regulator manifold, stable output voltage for adjustable white LED LED1 ~ LEDl5 use.
       In order to make the lighting adjustable, VT and where the transistor and other components, potentiometer RP1 form output voltage regulation. As a regulatory element with a transistor switch because with good insulation, and low resistance potentiometer is difficult to find, use only the general dimming potentiometer lamp, impedance 500kΩ around, so I can not directly regulate the voltage, so the use of transistor. Voltage regulation is: As the transistor collector through resistor R1 and the constant current of 5mA, so the set of a transistor VT emitter voltage can be changed by adjusting the bias resistor. When the potentiometer RP1 resistance transfer hours, partial rheological large sets. Smaller emitter voltage, output voltage is also smaller; the other hand, set a larger emitter voltage, output voltage is also larger. This allows the output voltage by adjusting the change between 8 ~ 10V, to achieve the LED's brightness.
       LED from the three series as a group, made of five parallel. As the white LED in the maximum operating voltage 3.5V, three LED series of 10.5V, taking into account the operating voltage of each LED is slightly different, so the power supply output voltage to take 10V.
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[Classification]
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[Function]
    According to the use of functional classifications are: reading lamps, decorative lamps.
Reading lamps
       Light body shape simple light, is designed to read and write the lamp, this lamp can generally adjust the height of the poles, light direction and brightness, mainly light reading function;
Decorative lamp
    The appearance of luxury, materials and styles, light body structure complex, space for decorative effect, decorative features and lighting features are equally important.
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[Style]
Classification according to style: modern lamp, antique lamps, European-style lamp, Chinese lamp.
    Classification according to material: metal table lamp, resin lamps, glass lamps, crystal table lamp, wood lamp, ceramic table lamp and so on.
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[The use of premises]
Use a different location, choose the size of the lamp size, style, material is also slightly different.
       Such as hotels with a lamp on the lamp than the size of home decoration much larger, especially for the hotel lobby lamps, larger dimensions, heavy luxury.
       European antique lamp durable engaging, supporting European architectural styles, with even better results.
       Modern business hotel suite, the support of some modern minimalist table lamp, refreshing simplicity, not dragging its feet, will be refreshing.
       Luxury high-end lamps, matched with a suitable environment, the case decorated space effect, whether the light is bright, or closed, is a work of art!
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[Purchase] selected
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[Source selection]
    Writing light source lamp generally has four categories: incandescent, halogen, fluorescent and LED.
    Three types of light sources have advantages and disadvantages, different people may prefer a different color and brightness of the light source should be the person should.
    To be able to most of the light projected onto the desktop, writing desk lamp light source position is usually installed horizontally or downward.
    Writing desk lamp in a normal working position, the optical performance requirements of the main three points:
(1) shading: one case in a normal sitting position, eyes to the horizontal direction, should not see the inside of shade and light;
(2) Desktop illumination requirements: lamp illumination of work area should be ≥ 250lx, the illumination should be ≥ 120lx;
(3) illumination uniformity requirements: should ensure that the work area illumination lamps, illumination is relatively uniform, not a particularly bright or dark spot, only to ensure that the optical properties of these three basic requirements in order to reduce eye fatigue, can be called was written on a table lamp. Writing lamp in the purchase, in addition to checking their optical properties, we must also examine other performance is satisfactory.
 [A pull, two tone, three roll, four touch]
"Pull" refers to the power cord plug from the socket, pull the power cord hard to light cavity, to see the power cord connections are secure. Power cord can not be detached from the lamp chamber.
"Transfer" refers to a variety of work adjustment lamp position adjustment can not be audible, should be able to adjust the position after the work convenient and reliable locking.
"Shake" refers to the lamp adjusted to the most adverse working position, then gently shake the lamp placed on a plane to see whether the lamp is easy to tip over, stable lamp is bad, it is easy to tip over.
"Touch" refers to the lamp lit for some time (2 hours), hand-to-use shade and other heating components are easily accessible hot, to prevent accidental burns when used in future.
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[Health characteristics of light]
★ Enjoy modern lighting, lighting to avoid adverse effects on human health. Expert tips, when to use indoor lighting, the lighting should be good grasp of the five principles:
1, using a wide range of lighting, the light should be irradiated to the entire desktop;
2, the use of uniform illumination, each part of the illumination must be consistent;
3, stable lighting, not light or blink when the dark out;
4, to maintain adequate lighting;
5, the last careful not to direct light in the eyes.
★ lighting with lamps should have a healthy common sense: for example, reading the best illumination and age have a great relationship, the elderly need 15 times the illumination of a child.
Eye ★ why high-frequency electromagnetic radiation:
       Eye To overcome 50hz frequency fluorescent strobe with 4 million to 55,000 hz frequency, inevitably will bring high-frequency power of electromagnetic radiation. Environmental experts pointed out that the excessive amount of electromagnetic radiation may cause heart palpitations, insomnia, leukopenia, memory loss, or even result in reduced immune function, cardiovascular system, nervous system damage.
Electromagnetic radiation damage is cumulative, the closer, lighter weight, the greater the damage by its. A little more protection, curbing risk has become a consensus.
★ Led the solid is a semiconductor light-emitting device: a small size, light weight, high brightness, low energy consumption, long life, high safety, high color purity, good direction, low maintenance costs, environmental pollution and so on.
★ Led lighting is a green light:
1, low voltage, less power consumption;
2, stable performance, long life (typically 100,000 hours);
3, shock, vibration and strong; led lighting products provide high-quality light environment, light effects to enhance the lighting system, no infrared and ultraviolet components, high color and has a strong directional light;
4, dimming performance, color temperature changes will not produce visual errors;
5, cold light source, low heat, safe to touch;
6, to improve the glare, reduce and eliminate light pollution.
7, zero flash, does not make eye fatigue phenomenon. Electromagnetic radiation, to prevent radioactive contamination to protect the brain.
8, it not only offers very comfortable and light space, but also a good way to meet people's physical health needs, is environmentally healthy light. Long-term use can protect vision and prevent myopia.
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[High-quality light source characteristics]
★ good source is the basis for the green light. High-quality light source should have the following three characteristics.
First, the spectral composition should be no ultraviolet and infrared light. Receiving long-term excessive ultraviolet radiation, not only likely to cause keratitis, but also on the lens, retina, choroid and other damage. Infrared can easily be absorbed by the water, too much of the infrared through the lens of the eye and he was gathering a lot to absorb, over time the lens degeneration occurs, resulting in cataracts.
Second, the light color temperature should be close to natural light. Long-life under natural light, the human eye for natural light adaptability, visual effect.
Third, no strobe lights to. Ordinary fluorescent lamp power supply frequency of 50 Hz, indicating that light and dark light 100 times per second, a low frequency of the strobe, the regulation of the human eye would adjust the tension in the state organs, leading to visual fatigue. If the light when the frequency increased to hundreds, tens of thousands of Hz and above --- a high frequency, the human eye that will not have strobe feeling; but the real is the DC power supply or without strobe light-emitting semiconductor solid devices (such as the led light diode) light emitted as no strobe.
★ the eye known as the no strobe lamp a lot. Most lamps use electronic ballasts work to improve the way the frequency can only be called the high strobe rather than true no strobe lamp.
★ DC Eye, a new milestone in the history of glass lamp, first through the AC into DC, with DC lighting, DC power supply, the point does not flash, and use of light close to natural light, very bright, but that does not flicker. Achieve real no flicker, no radiation.
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【Article is excerpted from: Baidu Encyclopedia】
【Network reprint / Just reference】
【Translation is by Goolge】