Shanghai, China, January 18, 2013 – The quality of LED lighting is significantly different from incandescent lamps: LED lamps are “colder†when dimmed than incandescent lamps. At the 2013 International Consumer Electronics Show held last week, NXP Semiconductors (Nasdaq: NXPI) demonstrated a breakthrough solution through which LED lamps can maximize the imitation of traditional incandescent lamps. When dark, it can produce warmer and more comfortable white light. In addition to the “sensorless sensing†technology developed and patented by NXP, the advantages of this solution include: eliminating the use of external temperature sensors reduces the cost of the LED system, reduces the size of the heat sink required for LED system cooling, and Significantly improve reliability. NXP ’s dimmable white LED demonstration can be viewed in the “Future Innovation†area of ​​its booth (CP8).
The light color of an incandescent lamp becomes warmer and more emotional when it becomes darker and less bright. In contrast, today's LED lights are generally inferior to the light color experience of traditional bulb users in the entire dimming range.
To make LEDs mimic incandescent lamps when dimmed, the NXP solution integrates three key functions into the drive circuit:
· Combine the white LED and amber LED as a cost-effective method to form the most pleasing light color (along the black body radiation curve)
· Perform logarithmic correction of eye sensitivity with an analytical model that allows the desired light color point to be achieved when darkened
· Sensorless sensing technology is used to directly measure the LED junction temperature to achieve accurate and efficient real-time temperature correction, which is essential for reliable control of LED performance under any conditions
No matter how long the LED is used, the smart LED driver developed by NXP can provide stable color and light output at any temperature through these functions. Sensorless sensing directly measures the LED junction temperature by connecting two existing wires of the LED, which solves the challenge of LED temperature drift and has more advantages than traditional LED temperature measurement methods. The use of sensorless sensing eliminates the need for external sensors or wiring, which reduces the total number of components and enables a more compact heat sink. In addition, sensorless sensing enables fast performance, accurate temperature measurement (~ 1 ° C res.), Dynamic light control, is not affected by heat sinks and operating conditions, does not require thermal modeling, and can compensate for use time through self-calibration.
Michael Bruno, senior director of advanced technology and future innovative business development at NXP Semiconductors, said: "Our research team has uniquely set out to answer this question: What can motivate consumers to finally receive LED lighting with the same emotions as incandescent lamps? Sensing technology, we have demonstrated a new way to achieve the warm light associated with incandescent lamps by using dimmable LED lights. Sensorless sensing also helps reduce the total cost of the system by reducing the number of components required, eliminating Another major obstacle to the widespread adoption of LEDs. This clever method significantly improves the reliability and lifespan of LEDs, so sensorless sensing has great potential in other areas such as automotive SSL and commercial LED applications. "
Optical fiber jumpers are used to make jumpers from equipment to optical fiber cabling links. There is a thicker protective layer, which is generally used in the connection between the optical transceiver and the terminal box, and is used in some fields such as optical fiber communication systems, optical fiber access networks, optical fiber data transmission, and local area networks.
Optical fiber jumper (also known as optical fiber connector) means that both ends of the optical cable are equipped with connector plugs to realize the active connection of the optical path; one end with a plug is called a pigtail. Optical Fiber Patch Cord/Cable is similar to coaxial cable, except that there is no mesh shielding layer. In the center is the glass core through which light propagates. In a multimode fiber, the diameter of the core is 50μm~65μm, which is roughly equivalent to the thickness of a human hair. The single-mode fiber core has a diameter of 8 μm to 10 μm. The core is surrounded by a glass envelope with a lower refractive index than the core to keep the optical fiber in the core. On the outside is a thin plastic jacket to protect the envelope.
The classification and overview of optical fiber patch cords are as follows
Optical fiber jumpers (also known as optical fiber connectors), that is, optical fiber connectors that are connected to optical modules, are also available in many types, and they cannot be used mutually. The SFP Module is connected to the LC fiber optic connector, and the GBIC is connected to the SC fiber optic connector. The following is a detailed description of several commonly used optical fiber connectors in network engineering:
â‘ FC-type fiber jumper: The external strengthening method is a metal sleeve, and the fastening method is a turnbuckle. Generally used on the ODF side (most used on the distribution frame)
â‘¡SC type optical fiber jumper: the connector for connecting the GBIC optical module, its shell is rectangular, and the fastening method is a plug-in latch type, without rotation. (Most used on router switches)
â‘¢ST type optical fiber jumper: commonly used in optical fiber distribution frame, the shell is round, and the fastening method is turnbuckle. (For 10Base-F connection, the connector is usually ST type. Commonly used in optical fiber distribution frame)
â‘£LC type optical fiber jumper: the connector to connect the SFP module, it is made by the easy-to-operate modular jack (RJ) latch mechanism
Patch Cord,Ftth Mm Patch Cord,Simplex Ftth Patch Cord,Sm Ftth Optical Patch Cord
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