LED indoor lighting faces three major tests of quality, price and intelligence

Judging from the actual usage, LED indoor lighting is roughly divided into industrial, commercial and household applications. Industrial indoor lighting is the market where LED enters earlier and has a large demand. In terms of product demand, it focuses on the characteristics of safety, energy saving and long life. For example, industrial miner's lamps generally take the route of high quality and energy saving. to save costs as the goal; Commercial Lighting focuses on scene effect and user experience, and sometimes special lamps with color temperature and color rendering at different angles are introduced for various application environments; However, home lighting often pays more attention to cost performance. At present, the obvious feature of this field is that downlights and bulb lamps, which are mainly used for home applications, have entered a low-cost era. The quality reliability needs to be improved urgently. Recently, the proportion of LED in the field of general lighting has increased rapidly, opening up a broader world for the application of LED Indoor lighting in the commercial field. this market is generally mostly engineering procurement, and the demand for products is large, so it has become a key market that various manufacturers are striving for. On the other hand, the ordinary civil lighting market has also been fully opened, and its development speed cannot be underestimated. More and more manufacturers have introduced relatively mature LED lamps and lanterns. and some products have broken through the scope of traditional lighting in terms of function and design. However, with the rapid development of indoor lighting, there is still a big gap in the application market's cognition of LED lamp quality. LED indoor lamps have many advantages, such as energy saving, long life, safety and reliability, etc. Wu Hongfeng, sales director of international sales department of Jiangsu wenrun Optoelectronics Co. , Ltd. , said, but in many practical cases, due to the incomplete cognition of end users towards LED, some merchants use clumsy products and technologies in order to attract users' attention and rapidly increase the market share. For example, for the sake of brightness, they abandon the life span; In order to save energy and abandon safety, the feedback from some terminal markets is that some LED lights are good, but most of them are easy to break and the price is not cheap. In view of the negative impact brought by this pursuit of short-term interests, he further pointed out that a new round of changes is taking place in the lighting market. this includes people's friction on the cognitive difference between traditional lamps and LED lamps. Once the advantages of LED are artificially made into disadvantages, it will make the market more difficult. especially in the early stage when the LED application market has just been opened, there is an urgent need for enterprises in the industry to consciously abide by technical and quality standards and jointly build a healthy industry development path. Taking the thermal energy management problem that has a great impact on the quality of LED indoor bulb lamps as an example, although LED lighting can significantly save energy, the overall service life of bulbs is said to reach 30 thousand to 50 thousand hours; However, in fact, many components in the LED drive circuit, especially the electrolytic capacitor, will age with the increase of temperature, resulting in excess heat in the modified lamps, which significantly reduces the service life of solid-state lighting bulbs. this also makes consumers greatly reduce the expected quality value of LED lamps. HubieNotohamiprodjo, marketing director of solid-state lighting products of Dialog Semiconductor Co. , Ltd. explained: the main reason for these problems is that some bulb designers do not know the use environment and state of bulbs. therefore, sometimes poorly designed thermal energy systems are used in applications with limited air flow, resulting in overheating of lamps and greatly reducing the service life of solid-state lighting bulbs. In order to effectively solve the above problems, unlike ordinary integrated circuits, which are equipped with overheating cutting devices, the design method of cutting off integrated circuits only in high temperature environment, the LED driver of Dialog adopts the patented derating technology of overheating protection, which can automatically reduce the driving current entering the LED with a slight step in the high temperature environment; When the temperature drops, it seamlessly restores brightness, and prevents it from exceeding the rated temperature of the electrolytic capacitor by reducing the working temperature in the low airflow bulb environment. and helps to achieve predictable bulb life. The popularization process of LED Indoor lighting with good cost performance is still largely related to the decline rate of product prices. especially in the development of indoor lamps, the big challenge is how to reach the appropriate price point of the product while achieving reasonable performance and safety standards. Among them, the 30 cost of LED lamps is spent on the drive control circuit, so the cost reduction of control circuits including LED drive IC is of vital importance. this also requires chip manufacturers to continuously introduce innovative and more cost-effective technical solutions. The price of LED light source is declining, but the driving electronic technology has not been greatly innovated, and the price has remained high, thus bringing pressure on product cost. Guan Zhenyuan, technical market manager of Marvell's LED driver chip product line, said that dimmable LED lamps will become the mainstream products in the market, but at present, a key point in the development of LED lighting driver IC lies in the compatibility of dimming. it directly affects the user's use experience. As LED lighting mostly adopts current-driven mode and the existing dimmer mostly adopts voltage dimming, there are also certain difficulties in compatibility. At the same time, further improving the integration level of chips to reduce the power supply size is also the main direction of LED power supply development in the future. According to reports, Marvell's mixed signal architecture and built-in advanced digital algorithms greatly help to enhance integration and reduce product costs. Marvell's cost-effective chip plan this year has brought the price of dimming products from 1. 5% last year. US $5 has dropped below US $1. It is estimated that by 2016, dimming bulbs will approach non-dimming prices, thus accelerating the popularity of LED lighting.