What are the functions and characteristics of table lamps? What are the characteristics of a table l

Features: 1. Advantages of wrought iron table lamp: fashionable, modern, diverse shapes, suitable for decoration and versatile, inexpensive. Disadvantages: Rust easily.

2. Advantages of crystal table lamp: suitable for luxury decoration, beautiful, grade, large size, heavy and luxurious. Cons: Brittle, **high.

3. Wood table lamp: advantages: classical, simple shape, suitable for Chinese decoration, moderate. Disadvantages: easy to break, fade, open glue.

4. Acrylic.

Advantages of table lamp: small size, low size, easy to carry. Disadvantages: not up to grade.

5. Advantages of resin table lamp: suitable for European style.

Decoration, the structure of the lamp body is complex, and the style is noble and elegant. Disadvantages: easy to fade over time, **high.

6. Advantages of jade table lamp: exquisite, high collection value Disadvantages: high and fragile.

7. Advantages of ceramic table lamp: artistic, classical, diverse styles, strong ornamentality, durability, and moderate. Cons: Brittle.

It can be used to place it on a table for lighting, and it can also be changed at any time. It's small and convenient to use.

1. Reading desk lamp, the appearance of the lamp body is simple and lightweight, it refers to the desk lamp specially used to read and write, this kind of desk lamp can generally adjust the height of the lamp pole, the direction and brightness of the light, mainly for lighting reading function.

2. The decorative table lamp has a luxurious appearance, various materials and styles, and a complex structure of the lamp body, which is used to decorate the space effect, and the decoration function and lighting function are equally important.

3. The table lamp in the living room has far exceeded the value of the table lamp itself, and the table lamp has become a rare work of art.

4. In addition to reading and decorating, the table lamp is decorated. The latest technology is also like a robot, can move, can dance, automatic dimming, ****, clock, **, touch and other functions, especially the ceramic craft of the table lamp also has the value of collection.

The table lamp is composed of a base, a bracket, a lampshade, a bulb, a power cord, and a switch; The dimming type has a dimming circuit board, and the energy-saving bulb with rectifier circuit cannot be used with an incandescent bulb;

Yellow light is similar to natural light, suitable for reading and writing, good for protecting eyesight, white light is suitable for lighting;

The principle is that the electronic touch IC is installed inside and the electrode sheet at the touch place of the table lamp forms a control loop, and when the induction electrode is touched, the touch signal generates a pulse signal and transmits it to the touch sensing terminal, and the touch sensing terminal will send out a trigger pulse signal to control the light to turn on.

Base, stand, lampshade, bulb, power cord, switch.

The light source used in the writing desk lamp on the market is mainly incandescent lamp, quartz halogen lamp and eye protection lamp, and the incandescent lamp mostly uses a bulb with a power consumption of 40w-60w as the light source, which does not require ballast, and is cheap, and the gap is mainly reflected in the modeling lamp shell process.

The incandescent lamp consumes a lot of electricity, the surface temperature is high, there is a strobe, the illumination is low, the life of the bulb is short, and the bulb is a spherical point light source, it is difficult to form a large and uniform high illumination area, so it is no longer used as a writing lighting in foreign developed countries, but only as a process decorative lamp.

1. Describe the overall appearance.

2. Components: The basic ones are the base, bracket, lampshade, bulb, power cord, and switch. There are also dimming circuit boards, which can only use incandescent bulbs and cannot use energy-saving bulbs with rectifier circuits.

The eye protection lamp is a dedicated tube and rectifier with no flickering. Yellow light is similar to natural light, suitable for reading and writing, good for protecting eyesight, white light is suitable for lighting;

3. Tell about the help that the lamp gives you, which can be played freely, and the number of words will be greatly increased.

The small table under the lamp is about 19 cm long and 10 cm wide. The thread was about 40 cm high and exactly 1 cm wide. The top of the table lamp is not less than 20cm long, not higher than 30cm, that is, 25cm long, and he has a width of less than 10cm, about 8cm.

The table lamp of the high-quality light source, the high-quality light source should have the following three characteristics. First, there should be no ultraviolet and infrared light in the spectral composition. Long-term excessive removal of ultraviolet light will not only easily cause keratitis, but also cause damage to the lens, retina, choroid, etc.

Infrared rays are easily absorbed by water, and excessive infrared rays are absorbed in large quantities when they gather through the lens of the human eye, and over time, the lens will degenerate, resulting in cataracts. Second, the color temperature of the light should be close to that of natural light. Living in natural light for a long time, the human eye has strong adaptability to natural light and good visual effect.

Thirdly, the light is flicker-free, and the power supply frequency of ordinary fluorescent lamps is 50 Hz, which means that the luminescence is brightened and dimmed 100 times per second, which is a low-frequency strobe flash, which will put the adjustment organs of the human eye in a state of tense adjustment, resulting in visual fatigue. If the luminous frequency is increased by hundreds or tens of thousands of hertz, the human eye will not have the sensation of strobosis; But true flicker-free is the light emitted by DC-powered or semiconductor solid-state light-emitting devices, which is called flicker-free.

Disadvantages, first, **expensive; Second, there is a big gap between the generally achievable light efficiency and the theoretical light efficiency; Thirdly, there is a certain amount of calorific value.

Schematic diagram of the circuit of a rechargeable LED desk lamp. ​

The circuit is shown in the diagram above. After the power is turned on, the AC 220V voltage is filtered by the capacitor C1 step-down current limit, the rectifier bridge bridge rectification and the capacitor C2 filter, and a DC voltage is generated to charge the 4V battery through the diode VD. The charging current of the battery is mainly determined by the capacitor C1, when C1 adopts the capacitance of 1 F, the charging current of the battery is about the charging indicator, and the resistance R1 is the discharge resistance.

The LED2 LED20 in the figure (not all of these lamp beads are drawn in the figure) are multiple white LED lamp beads connected in parallel, and each lamp bead is connected in series with a 51 chip current limiting resistor. K is the power switch of the desk lamp, close K, LED2 LED20 can be lit. It needs to be said here that due to the high voltage at both ends of the battery during charging, do not close the switch K when charging, otherwise it is easy to damage the LED lamp beads.

The rectifier bridge in the circuit is generally selected as a rectifier bridge in chip packaging, and the commonly used models are MB6S and DB107S.

Generally speaking, according to the light source of the table lamp, we can divide the table lamp into three categories: LED lamp, table lamp, incandescent lamp, table lamp and fluorescent lamp.

The traditional fluorescent table lamp is essentially a low-pressure mercury lamp. There is a low-pressure mercury vapor inside the fluorescent lamp, and when the power is turned on, the energized mercury vapor will release ultraviolet light, and the phosphor that encounters ultraviolet light will emit visible light to the naked eye. That's how it works.

In addition to conventional fluorescent lamps, there is also a type of electrodeless fluorescent lamp. It is different from traditional fluorescent lamps in that electrodeless fluorescent lamps have no electrodes and filaments, but the working principle is still similar to that of traditional fluorescent lamps, which use the properties of mercury to make phosphors emit light. At the same time, electrodeless fluorescent lamps have a longer service life and better light efficiency.

Summary. A table lamp is a type of lamp, which is small and delicate and easy to carry. This appliance is mainly placed on a writing desk or dining table for lighting purposes. The illumination range of the table lamp is relatively small and concentrated

The table lamp is mainly decorative, will not affect the light of the whole room, the role is limited to the table lamp, easy to read, study, work, save energy. The table lamp has far surpassed the value of the table lamp itself, and the table lamp has become a rare work of art. Under the concept of light decoration and heavy decoration, the decorative function of the table lamp is more obvious.

What does a table lamp do.

A table lamp is a type of lamp, which is small and delicate and easy to carry. This appliance is mainly placed on a writing desk or dining table for lighting purposes. The light irradiation range of the table lamp is relatively small and concentrated, and the table lamp is mainly decorative, which will not affect the light of the whole room, and the role is limited to the table lamp, which is convenient for reading, learning, working, and saving energy.

The table lamp has far surpassed the value of the table lamp itself, and the table lamp has become a rare work of art. Under the concept of light decoration and heavy decoration, the decorative function of the table lamp is more obvious.

When it comes to LED desk lamps, everyone must be familiar with them, including the elderly, middle-aged people, working youth, students, etc. So what are the uses of LEDs? For example, it is used for studying, reading, working, field, power failure and other lighting, which is also a common use in life, precisely because it is used for many purposes, and it is not expensive and easy to carry.

Some LED desk lamps can be folded, which makes it more convenient for users to carry and store.

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Table lamp, is a kind of lamp, small and exquisite, can be placed on the plane bench there is a lamp, more with lampshade, designed for reading, table lamp is a household appliance used to illuminate people's lives, the bulb used for table lamp is incandescent lamp, energy-saving bulb.

There are many types and styles of table lamps, and bulbs are divided into: energy-saving lamps, incandescent lamps, and LED bulbs. The control methods are: switch control, touch control, brightness adjustable, and even voice control.

But what consumers want is a practical, energy-efficient, reliable product. Under the national "Eleventh Five-Year Plan", the popularization of energy-saving products such as LED has been promoted.