1, Philips as a pioneer in the field of LED intelligent lighting, its LED bulbs not only have excellent durability and high efficiency, but also can realize a variety of light source control such as stepless dimming and gradual color adjustment, greatly improving the comfort of lighting use. At the same time, Philips bulbs use a specially designed radiator, which can effectively reduce the working temperature of the lamp, ensure the service life of the lamp, and the environmentally friendly materials used are more in line with the green concept of modern people.
2, so led chip light andled bulbs can not say which is good, because they are themselves dependent. led bulb which brand is good? Opp Lighting, founded in 1996, is a global lighting enterprise integrating research and development, production and sales, and has become a recognized well-known brand in lighting. At present, OpP Lighting has 28 offices and more than 1,300 stores throughout the country, more than 5,000 sales outlets, products are exported to more than a dozen countries and regions in the world.
3, Philips: Philips as a world-renowned lighting brand, its LED bulb products in light efficiency, color temperature, life and other aspectsAll have excellent performance. Philips LED bulbs use high-quality LED chips to ensure uniform and comfortable light, while having a long service life. In product design, Philips focuses on energy conservation and environmental protection, and a number of products have obtained energy efficiency label certification to help consumers save energy costs.
main body Different LED chip: also known as led light chip, is the core component of led lamp, that is, refers to the P-N junction. A solid semiconductorComponents. Lamp bead: light emitting diode abbreviation for LED. Wafer: is the core part of the LED, a single grain is fixed on the plastic or ceramic chip base.
The light concentration of the two is different, and the range is different: the Angle of the LED lamp bead is very small, which is a relatively concentrated light, and the range is very far, but the irradiation range is limited; The general Angle of the LED patch is very large, which belongs to the relatively scattered light, wide irradiation range, but the range is relatively close. The luminescence method used is different: LED lamp beads are used for discharge luminescence, and LED patches are used for cold luminescence.
LED chip is the core of LED light, it is just a small box, there are positive and negative electrode 2 solder joints. LED lamp bead is the LED chip's positive and negative electrodes are connected to the bracket through the gold wire respectively to form a loop, and then use colloids to protect the fragile gold wire and chip as a whole.
1, LED chip basic knowledge: a solid-state semiconductor device, the heart of the LED is a semiconductor wafer, one end of the wafer attached to a branchOn the shelf, one end is a negative electrode, and the other end is connected to the positive electrode of the power supply, so that the entire chip is encapsulated by epoxy resin.
2, LED chip type LPE: LiquidPhaseEpitaxy (liquid phase epitaxy) GaP/GaP. VPE: VaporPhaseEpitaxy (Gas phase epitaxy) GaAsP/GaAs.
3, its working principle is to convert the input current into the current and voltage suitable for LED lamp work. Specifically, the LED driver chip is usually composed of two parts: the power supply part and the control part. <4, its working principle is to use the control circuit inside the circuit to control the size of the output current, so that the LED lamp produces different brightness output. The circuit design of the LED driver chip is generally composed of the following parts: Input voltage control: This part is responsible for stabilizing the input voltage and ensuring that the driver chip can work normally.
China Star (Ledtech Electronics), Dongbei (UnityOptoTechnology), Para Optoelectronics, light (Everlight electronics), hundred hong (BrightLED electronics), gold (Kingbright), bright LingSen precision industry (LingsenPrecisionIndustries), the target, electronic, Lite - OnTechnology, HARVATEK, etc.
Shandong Huaguang, Shanghai Lanbao, etc. Foreign LED chip manufacturers: CREE, HP (HP), Nichia Chemical (Nichia), Toyoda Gosei, Dayan Acid, Toshiba, Showa Denko (SDK), Lumileds, Smileds, Genelite, Osram, GeLcore, Seoul Semiconductor, etc., PRui, Korea Guoying (Epivalley) and so on.
Foreign eight famous LED chip brand ranking: CREE: The famous LED chip manufacturer, American CREE Company, products based on silicon carbide (SiC), gallium nitride (GaN), silicon (Si) and related compounds, including blue, green, ultraviolet light emitting diode (LED), near ultraviolet laser, radio frequency (RF) and microwave devices, power switching devicesAnd silicon carbide (SiC) epitaxial sheet for production and scientific research.
Foreign LED chip manufacturers are: United States CREE (CREE), HP (HP), Nichia chemical (Nichia), Toyoda Gosei, Ocean Acid, Toshiba, Showa Denko (SDK), Lumileds, Asahi (Smileds), Genelite, Osram (Osram) and so on.
SAN 'an Photoelectric, Huacan photoelectric, Dehao Runda, dry light photoelectric, Jucan photoelectric, Nantong Tongfang, Hefei Blu-ray, Huanrong Photoelectric, Xiangneng Hualei, Aoyang Shunchang and so on are all domestic comparisons