White LED headlamp further "from practical only so"

Figure 1: Stanley electric and Germany Hella company jointly developed the headlight Figure 2: small silk production exhibited headlight Figure 3: German OSRAM company demonstrates the headlight with white LED light source Figure 4: synthesis of TOYOTA exhibited white LED headlamp Figure 5: TOYOTA display of Lexus brand concept car LF-Sh". Equipped with white LED headlamp. Stanley electric (STANLEY ELECTRIC) and small silk production in the Tokyo auto show, which can be exhibited high power white light emitting diode (LED) for dipped beam and high beam headlights products. Speaking with white LED lamp, lamp manufacturers exhibited in the recent exhibition, the use of white LED module, then use the HID lamp in the headlights on products only in the last. The show also appeared in the high beam is also the use of white LED module trends. In addition to lighting manufacturers, OSRAM and TOYOTA (OSRAM GmbH) synthesis of white LED manufacturers also exhibited the headlight white LED light source, give the impression that the white LED module is moving towards high power of impression. All products of the white LED module with optical lens under the condition of diameter were 30mm ~ 50mm, as LED belongs to the larger varieties. Before and after 2008 more than headlamp luminous efficiency HID lamp Stanley Electric is on display with the German company Hella (Hella KG Hueck&Co.) jointly developed (Figure 1). Production will be 4 large LED chip package into a high-power white LED module, this module is equipped with 5 headlights, in the last with 2. The light beam when the total of 700lm, according to reports "can ensure the brightness of the HID lamp just listed" (Stanley electric commentator). Each white LED module emits a beam of about 140lm. The company did not announce the electric power production, but at this stage in order to ensure the necessary brightness as the headlamps, HID lights and electric power consumption of the same brightness products compared to the estimate is 1.4 times to 1.6 times of the latter. The increase in luminous efficiency of white LED has slowed in the past, but has recently regained momentum. Estimated before and after 2008 will reach and exceed the luminous efficiency of HID lamps (Stanley electric commentator). The headlight on display in the development, until the package of LED chip, are used in electrical technology developed by Stanley, the packaging of optical technology to produce a headlamp required is jointly developed by Stanley electric and Hella company. It is said that according to Hella proposal, on the packaging technology was improved. Small silk production exhibited headlamps equipped with 11 white LED module, including the 6, 5 additional high beam light (Figure 2). The light beam of 800lm ~ 1000lm. According to the running state, to control the LED module with the white light. For example, when driving at high speed, the central part of the 5 light, reducing the scope of the beam emitted by the front light, so that the light reaches the distance. In urban traffic, above the central part of the 1 lamp equipped with both sides of the 3 and the central portion with a white LED headlamp light module, enlarge the lighting angle. The front lamp also has a AFS function, in order to turn the corner when the light is turned to turn the direction of the car, the central part of the headlight can be changed. The energy conversion efficiency of the light source system is 65% white light LED light source, which is displayed on the front face of OSRAM, which is equipped with a white LED module named "OSTAR" developed by German OSRAM (Figure 3). OSTAR is the 4 1mm square large LED chip packaging products together. The beam of each module is as high as 300lm. OSRAM uses OSTAR to produce a light source system that includes a power supply for the white LED module IC. When the system is powered up, the conversion efficiency can reach 65%. The back of the light source is equipped with a large heat sink, the cooling efficiency of the light source is also very high. TOYOTA synthesis of white LED light source is also a large number of large LED chip package in 1 modules. The company is prepared to use 12 of the light source of the prototype (Figure 4). Open beam and other details. White LED light utility will take time at the Tokyo motor show concept car, almost all the white LED headlamp. Not only is the production car with peculiar shape feel practical is very far, even as TOYOTA concept car Lexus brand flagship sedan launched LF-Sh and TOYOTA brand next-generation minivan concept car also equipped with white LED headlamps, let a person feel the practical is very close (Figure 5). But in order to use the white LED as the main light source of the headlight, the corresponding legal amendment seems to be somewhat slow. The practical phase of the white LED headlamps will be pushed back to the point of view of the various companies in the exhibition hall heard many times. The United Nations Economic Commission for Europe to consider the headlight laws of "GRE" is estimated to be at the beginning of the year by the end of 2006 to 2007 to allow the headlight main light with white LED, but the time available even if the soonest dragged after the autumn of 2007. GRE allows the use of estimates, including Japan and other regions will also allow the use of white LED. A headlamp manufacturers said that if the GRE Committee held in the autumn of 2005 through, the amendments to the law in the autumn of 2007 and, if the Committee has not been passed, the period will be postponed to may from the autumn of 2007. - Technology Online