Semiconductor laser is also known as laser diode, which uses semiconductor materials as laser’s operation materials. When comparing with other lasers, laser diode has incomparable performances, such as low driving voltage, high efficiency and safe incentive mode, so that it can be widely used for long-distance communication, digital signal storage and recovery, laser range holographic application, etc. Semiconductor laser has strict demands on working conditions and it is much affected by the operating temperature and the driving current.(more)

Semiconductor laser is also known as laser diode, which uses semiconductor materials as laser’s operation materials. When comparing with other lasers, laser diode has incomparable performances, such as low driving voltage, high efficiency and safe incentive mode, so that it can be widely used for long-distance communication, digital signal storage and recovery, laser range holographic application, etc.(more)

As a fourth-generation automobile light source, LED (Light Emitting Diode) lamps have been widely used for producing many beautiful car style by car manufacturers. LED light has many advantages including no delay, energy saving, long life, low heat, seismic resistance and high color purity and it has taken place of tungsten filament lamps and halogen lamps in many fields. Although its cost is very high, LED lamp has incomparable advantages of good quality and high grade when comparing with incandescent lamp. Because of the monochromaticity of LED light, it can directly select LED components of different wavelengths to design cornering lights, brake lights, backing lights, bicycle taillight and other lights. It can also make light transmittance increase without color filters and improve the utilization rate of the light.(more)

In 1821, Thomas Seebeck discovered when two conductors with different materials and different temperature are connected, there is current flowing in the loop However, twelve years later, J. C. Peltier discovered an opposite phenomenon, that is ,by deleting a conductor in the loop, the external current can flow through the loop, and then a temperature difference between two connecting points is appeared. This phenomenon came to be known as Peltier Effect. Owing to the limitation of material at that time, the temperature difference in Petier Effect is mostly the thermal resistance produced when large current flows through the materail. Along with the development of material science in recent years, the heating or cooling effect of the connection point becomes more practical, which can be used as heat pumps. In actual application, there's no much difference with the cooling method that is based on fluorine carbon vapor compression refrigeration. There are no moving parts and working fluid in TEC, so it makes refrigeration equipment miniaturization possible.(more)

TEG is the abbreviation of thermoelectric generator, which can convert heat directly into electricity, totally opposite to TEC. TEG can be used as anti-corrosion protection for oil pipeline and gas pipeline and it can also be used as a power supply for monitoring facilities.(more)

Glass sealed NTC thermistor is a kind of NTC thermistors, which is mainly used for temperature compensation. The main features of glass sealed NTC thermistor is high reliability, high stability, compact size, light weight, high temperature resistance and moisture resistance, but its response time is little longer. What’s more, this NTC thermistor has high accuracy of measurement and wide range of temperature. It is very convenient to be installed on PCB. Because of the glass wrapping, this NTC thermistor can be utilized in high-temperature and high-moisture environment.(more)

As shown figure 1, the heat flow ∅_0 goes through the bottom of heat sink and then goes into its root. In the root, the heat flow will be divided into two shares ∅_1and∅_2, and then through the root and environment air, start convection and heat exchange. Finally, the heat flow goes into the environment by heat exchange with fins. The heat resistance network model is shown in figure 1.(more)

LED is a kind of solid semiconductor lighting devices. Similar with traditional light source, during work, the solid light source will generate heat because of current flowing in the diodes. As long as the current flows continuously, the heat will continue to be produced. The node temperature of LED must be below 125℃. The high node temperature will bring many adverse effects, such as the quantum efficiency of LED reducing, the luminousefficiency declining, the peak wavelength shifting and service lifetime severely shortening.(more)

Thermoelectric materials have three effects: Seeback effect, Peliter effect and Thomson effect.(more)

With the development of science and technology, TEC has attracted more and more attention and it has been widely used in our life. Now the following is about the application of TEC in home appliances.(more)