LEDs, or semiconductor light-emitting diodes, are one of the largest and most active high-tech industries in the 21st century. This paper tries to explore the key to the improvement of LED technology from the development trend of indoor lighting. I hope that with the joint efforts of the industry, it will play a role in promoting the healthy and orderly development of China's LED industry.
Preface
According to the statistics of Strategies Unlimited, the development of LED indoor lighting will show an exponential growth trend in the next five years. It is estimated that by 2011, its output value will be tens of billions of dollars. This is both an opportunity and a challenge for LED indoor lighting. According to the development trend of indoor lighting, it is very necessary to upgrade the key of LED technology.
First, the classification of indoor lighting
1. Classified according to the explicit way
(1) Direct lighting
The so-called direct illumination means that 90%-100% of the luminous flux reaches the hypothetical working surface after the light is emitted through the luminaire, which produces strong contrast of light and vivid light and shadow effects, which can highlight the dominant position of the working surface in the whole environment, mainly Used in the workplace.
(2) Semi-direct lighting
The so-called semi-direct illumination means that a lampshade made of a translucent material covers the upper part of the light source, so that 60%-90% of the light is concentrated to the working surface, and in addition, 10%-40% of the light in the cover is used. The translucent lampshade diffuses and diffuses upwards. The light produced by the lighting method is softer, and the upward diffusing light increases the sense of space of the building, and is mainly suitable for rooms with lower heights.
(3) Indirect lighting
The so-called indirect illumination refers to the illumination method of indirect light generated by shielding the light source, wherein 90%-100% of the luminous flux acts on the working surface through the reflection of the ceiling or the wall surface, and less than 10% of the remaining light is directly irradiated. On the work surface. In general, this type of lighting can only achieve special artistic effects when used in conjunction with other lighting methods, mainly used in shopping malls, clothing stores, conference rooms, etc.
(4) Semi-indirect lighting
Compared with semi-direct illumination, semi-indirect illumination is a completely opposite illumination method. Specifically, a translucent lampshade is placed in the lower part of the light source, so that more than 60% of the light is directed to the flat top, thereby forming an indirect light source. The remaining 10%-40% of the light is diffused downward through the lampshade. This method can produce more obvious lighting effects, so that the lower room has a certain increase in height. It is mainly suitable for small parts of the house, such as the entrance hall, the aisle and so on.
(5) diffuse lighting
Diffuse illumination refers to the use of the refracting function of the luminaire to control the glare, thereby diffusing the light around. There are two general forms of such illumination, one in which light is emitted from the upper opening of the lampshade and reflected from the flat top, the sides are diffused from the translucent cover, and the lower portion is diffused from the grille. The other is to use a translucent lampshade to completely block the light to create a diffuse. The light produced by this type of lighting is visually comfortable and suitable for bedrooms, guest rooms, etc.
2. Classified according to the type of Ming
Overall lighting: The overall lighting in the room is designed to illuminate the interior spaces, allowing people to distinguish between interiors, passages and doors and windows.
Key lighting: Use the spotlight to draw the decorative painting on the wall or map the objects on the countertop and the cabinet to make it stand out and make it a visual center.
Auxiliary lighting: mainly used in conjunction with accent lighting for some statues, crafts and other lighting.
Hierarchical lighting: It is mainly suitable for the façade design with more front and rear layers. Under the lighting effect that the luminaire does not meet the requirements, the backlight, the ground lamp and the backlight of the first two layers of decoration are added to modify Achieve the purpose of strengthening the sense of hierarchy.
Three-dimensional lighting: mainly install different types of lamps in different orientations and different angles of indoor space, even install lamps at the back and bottom of the furniture, aiming at enhancing the sense of space in the room, suitable for gatherings or lively places, easy to create atmosphere.
Decorative lighting: Use colored light sources, neon tubes, plastic strips or optical fibers, and lasers to make lighting patterns and text for pure decoration.
Generally speaking, overall lighting (basic lighting, ambient lighting) is generally used in office spaces, while in homes, shopping malls, bars and other places, several lighting combinations are used.