What does multi touch screen mean_ Principle of multi touch screen

Principle of multi touch screen Definition: different from the traditional single touch screen, the biggest feature of multi touch screen is that it can operate the content of the screen with two hands, multiple fingers, or even multiple people at the same time, which is more convenient and humanized. Multi touch technology is also called […]

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Analysis of types and luminous principle of white LED

Development of white LED For general lighting, people need white light source more. In 1998, white LED was successfully developed. This led is made of Gan chip and yttrium aluminum garnet (YAG). Gan chip emitting blue light( λ P = 465nm, WD = 30nm), the YAG phosphor containing Ce3 + Prepared by high-temperature sintering emits […]

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How to reduce the temperature rise effect in LED light emitting devices

1、 Introduction As we all know, LED is an electroluminescent device, and its basic physical process is the transformation from electric energy to light energy. The so-called improvement of LED power is to improve the electrical input energy and obtain the largest possible optical power output at the same time. Usually, the light energy (luminous […]

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Analysis of design technology of LED driving power chip

Recently, the price of phosphors has increased dramatically, resulting in an increase in the cost of fluorescent lamps; The manufacturing technology of LED light source has developed rapidly, which makes its cost drop rapidly; The post earthquake nuclear power problem in Japan has led to a rapid growth in the demand for LED lamps in […]

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Structure and working principle analysis of white LED card lamp

LED is the abbreviation of light emitting diode. It is an electric light source made of semiconductor technology. The core of LED is a chip composed of p-type semiconductor and n-type semiconductor. There is a transition layer between p-type semiconductor and n-type semiconductor, called p2n junction. When conducting in the forward direction, most carriers and […]

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Working principle analysis of lighting light sensing power saving controller

At present, the lighting of most school classrooms still adopts manual control switches, but often due to people’s indifferent awareness of power saving and neglect of management, even in the case of abundant natural light, the lighting in the classroom can still be seen everywhere, which not only consumes electric energy, but also reduces the […]

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