Portable LCD backlight LED driver solution brief-LCD backlight - the electronics industry

Into the twenty-first century, Energy Consumption is increasingly becoming the focus of the entire human society. For the basic needs for lighting, how to be more efficient use of energy to produce more light, a new lighting technology to explore the great driving force. From the original fuel to the incandescent lighting from fluorescent to explore the various light-emitting materials, gave birth to LED Lighting technology. In today's society needs a variety of media devices differentiated lighting environment and further promote the use of a variety of human exploration for the high brightness LED lighting. The application of LED lighting has attracted wide attention.

LED performance characteristics of the basic principles and
First let us introduce the basic principle of LED performance characteristics. LED's basic structure is an Electroluminescence Semiconductor materials , Placed in a wire rack, and then surrounded with epoxy resin seal, protect the internal core wire effect, so LED's seismic performance. LED The core part by the p type semiconductor and n type semiconductor chips formed in the p type semiconductor and n type semiconductor between a backing layer, called the PN node. In some semiconductor materials, PN junction, the injection of minority carrier and majority carrier recombination extra time to time to the form of light energy released, which convert light energy directly into electrical energy. PN junction reverse voltage, minority carrier injection is difficult, it is not light. When it is in working condition when the positive (that ends with a positive voltage), current flows from the LED anode cathode, the semiconductor crystal on the issue from the ultraviolet to infrared light of different colors of light intensity and current.

LED light source has the following characteristics:
1. Voltage: LED is low voltage through the wizard, you can use low-voltage power drive, power supply voltage varies according to the final product is a safer lighting, especially for public places.

2. Performance: the case of equal illumination consumes less energy than incandescent lamps with luminous efficiency of 80% reduction.

3. Applicability: Each LED module is 3-5mm small piece of square, it can be fabricated into various shapes of the device, and for volatile environment.

4. Stability: typically 10 million hours of light for the initial 50% decline.
5. Response time: the incandescent millisecond response time, LED lights nanosecond response time.
6. On the environmental pollution: no harmful metal mercury.
7. Color: LED luminous efficiency and color and production of LED light-emitting materials and the process, there are red, green, blue three basic colors.

8. Price: Compared with incandescent lamps, LED high prices, the price of a few LED with an incandescent lamp can be quite a price, but as technology advances in technology, you can gradually enhance the cost-effective.

LED Driver Solution

LED Since inception, we have great concern, LED drive device and drive method for continuously updating more effective to drive LED lighting for mankind. From the early DC / DC Switching Power Supply To the charge pump, and the pursuit of cost drivers and the low side LDO, the application of different people use different drive the next line, as the market focus of attention, portable display backlight is LED backlit applications key market for portable below backlight display products, introduced the LED drive current of several common programs.

MP3 player- Best entertainment devices

The Mp3 player is also known as a digital audio player that is a electronic device. This device can store, play and organise a large number of audio files. There are four types of storage media such as flash based players, MP3 CD players, networked audio players and hard drive based players. The flash based players are known as non-mechanical solid state devices, which hold the digital audio files with internal flash memory or memory cards. And hard drive based players are called digital jukeboxes that help to read the digital audio files from a hard disk drive (HDD).
The capacities of these devices are up to 250 GB. MP3 CD players are the portable CD players, which can decode and play audio files stored on CD. One can connect through Wi Fi network to receive and play audio with the help of networked audio players. The MP3 player is empowered with rechargeable batteries. Some players charge via a USB cable. The main features of MP3 players are flash memory, a hard disk drive, an embedded processor and an audio codec microchip. The top-most players are Apple iPod video, Sony network walkman NW-HD5, Creative Labs Zen Micro and Philips MP3 players.
These devices can be afforded easily by a middle class or a lower class man. One can also record, sing and dictate with the help of built-in microphone. The FullSound feature helps in listening high quality music and songs with the clear voice.
The Philips MP3 players are launched by the most reliable brand Philips. These products are empowered with high quality and incredible technical specifications. This product has a smallest hard drive recorder. It is also empowered with GoGear portable audio players that helps for availing the experience of audio and video content. A person can use it easily without any hassle. With the help of this feature, an individual can view good quality video and images. The user interface gives the huge file storage and can access in an easy way. This device is a user friendly product that allows the device user to scroll the large libraries in a speedy way. One can quickly find one's favourite songs and videos in a moment. An individual can also manage files easily in this device. A person can download, organise and browse the audio and video files quickly. On the FM radio, one can enjoy the favourite songs and also can pre-set the stations up to 20 frequencies. Thus, we can say that MP3 players are the best products for listening music.