Analysis the challenges of LED lamp design and replace the existing lighting

LED is a fast developing technology, is widely used in many general lighting field, commonly referred to as solid state lighting. LED lighting is the typical application of indoor lighting: ( used for commercial, industrial and residential environment ), outdoor lighting ( lamps, parking lot lighting ) as well as the construction, decorative lighting, initially, light emitting diode due to launch the entire spectrum of color was used for decorative lighting.

In some cases, LED has become the effective scheme of building lighting. Compared with other lighting technologies, LED under cabinet light has more excellent performance, and thus become the general lighting market mainstream programme:

1.       Compared with other lighting technologies, LED has a longer service life. Working life of LED for up to 50000 hours, and the incandescent lamp service life of only 1000 to 2000 hours, compact fluorescent lamp ( CFL ) service life of about 5000 to 10000 hours. The service life of a significant advantage makes LED very suitable for those who need to invest more manpower cost replacement of lighting of commercial and industrial applications.

2.       better energy efficiency than incandescent lamps and halogen lamps, equivalent to the fluorescent lamp. In addition, the efficiency of LED has also been improved; the efficiency of white LED ( WLED ) over the next 3 to 4 years is expected to raise about 50%.

3.       smaller size. LED lamp dimensions are equivalent to the MR16 and GU10, and CFL cannot satisfy this kind of application.

4.        can adopt the appropriate driver provides brightness adjustment. The need for adjusting the brightness of fluorescent lamp, with the technical limitations. Although the traditional LED design also encountered similar problems, but Maxim provides LED drive innovation scheme compatible with the silicon controlled dimmer and dimmer design along.

5.       strong light direction. And other lighting technologies, LED is ideally suited to the needs of directional lighting applications, such as: small angle reflector lamp.

6.        when the low temperature with high efficiency. Fluorescent lamp work efficiency in the low temperature will drop. In contrast, LED is very suitable for the low temperature working environment, for example: refrigerator lamp.

7.       can easily change light color. This advantage makes RGB LED strip become the building and situational ideal lighting, according to the specific requirements of real time change of light and color.

8.       In short, LED has incandescent and fluorescent lamps do not have many advantages. Based on these advantages, design staff are also constantly explore for LED lighting application, however, due to limited space, we are not in this speech. This paper will mainly discuss inground LED light products, used as a substitute for the same specifications of the incandescent lamp, halogen lamp or a fluorescent lamp. These LED lamps must be installed into existing specifications and compatible with existing infrastructure.

 LED replacement lamp

 Many people believe that LED replacement lamp is currently the fastest growing LED lighting market. The rapid growth of the reason for this is simple: these lamps do not need to update the electrical infrastructure (wiring, transformers, dimmers and socket ), this is a significant advantage of LED technology.

 For designers, LED lamp mounted to the existing infrastructure, there are two major challenges:

1.       dimension.

 Replacement lamp must be able to install to the light source within the framework of.

 2.       electrical compatibility. Replacement lamp must be able to in the existing electrical structure of the normal work, no flashing lights.

 Below, we will discuss each of each challenge.

 Mounted to the existing framework

 The existing framework on the generation of light presents physical limitations ( i.e. drive plate must be small enough ) and thermal limit requirements. These factors restrict the design personnel to replace the lighting programme conditions (such as PAR, R and A specifications ), the small size of the difficulties in applications will be large, such as MR16 and GU10.