As soon as the light enters the waveguide, it will travel within it.
To facilitate a uniform emission of light, one or both faces of the light guiding panel may include a surface pattern made up of a surface roughening that creates a disruption to the light guiding properties of the LGP, at the site of the area producing a preferential emission of light at the area. the face opposite the light emitting face), the rear face will frequently add a light reflective layer. To minimize light emission from a rear face of the panel (i.e. A reflector may be installed on the back surface of the panel in order to reflect light toward front side surface of the panel that would normally exit from the back surface of the panel. Light from the LEDs enters the edges of the LGP and is re-directed within the LGP to ensure that the light radiates from the front face of the LGP. The light is guided by total internal reflection through the entire volume of the medium and after that emitted from a light emitting face. The light sources for edge lighting include SMD2835, SMD5630, SMD3014, SMD4014, etc.Įdge-lit LED panel lights are known wherein light is coupled into the edges of a planar light guiding panel (waveguiding medium). A plurality of SMD LEDs are positioned adjoining to two or more of the edges of a light guide panel. The aluminum frame provides structural support, holds components of the LED panel such as LED strips and power circuitry, and also provides heat dissipation. An LED panel generally speaking can be divided into a frame, and light emitting structures encompassed by the frame. Edge-lit LED light panels can provide an ambient white that extends uniformly throughout the front face of the panel by integrating one or more diffuser elements. The lighting fixture and associated retrofit kit offers a device with great versatility and simplicity of installation. The availability of a substantially flat LED panel having edge lighting makes it possible for thin panels of flexible length and width delivering uniform light output. Edge-lit LED panels are becoming an extremely popular technology used in indoor lighting fixtures. Current LED flat panel lights are typically designed by using edge-lit backlight theorem, light is transmitted from an LED array to a central area of an edge-lit panel through light guides. The introduction of the edge-lit LED panel lights is based on balancing the relationships of the aforementioned factors to achieve a fixture that produces a light output that appears consistent to the human eye across the diffuser panel. the strongest light output intensity area) will be observed. For a direct-lit light panel having the diffuser layer disposed too near the LED light sources, the light output is non-uniform and hot spots (i.e. As a result it creates a point source of light which can be uncomfortable or harmful to a person's eyes. LEDs are oriented directly toward light diffusing layer, inducing the light emitted from LEDs to shine directly onto light diffusing layer. But bear in mind, LED is a form of directional light source of which light output intensity of the Lambertian lights is strongest at 90 degrees. A direct-lit LED panel comprises a plurality of LED light sources which are directly disposed under a panel. Two of the primary lighting panel structures are direct-lit backlight modules and edge-lit modules. An LED panel light is designed to provide sufficient lighting to replace the current fluorescent fixtures of varied light intensity, or lux level. Suspended ceiling represent a large proportion of the commercial, office and retail space. LED flat panel light is an innovative lighting product in recent years. Light emitting diodes (LEDs) are getting more commonplace in general illumination applications, such as office spaces and conference rooms.
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