LED Panels

 

There are two types of LED Panels. The difference between the panels is the location of the LEDs and how light is dispersed. The two significant differences between Edge-Lit and Backlit panels are:

  1. ·       Location or positioning of the LEDs
  2. ·       Light dispersion.

Edge-Lit

As the name implies, this type of LED Panel has LEDs that are placed on the edge of the frame. It is made of a row of LEDs attached to the frame (or circumference) of the panel, shining horizontally into a light-guide plate (LGP). The LGP directs the light downwards, through a diffuser into the space below.

Edge-lit panels are sometimes also known as side-lit panels.

Key Points:

A light-guide plate (LGP) is an effective and simple way to diffuse the light, avoiding the risk of bright spots.

No lenses are required and the edge-lit design functions well with a variety of different LED beam angles.

Heat from the LED chips is dissipated via the frame, so the rear can be light-weight and it won’t get hot, so the driver can be placed here if required.

Edge-Lit Panels can be installed in standard grid ceilings, but their distinctly ultra-thin frame allows for other installation options, including surface mounting to ceilings or walls and suspension from ceilings using junction box or cable mounting kits.

When compared to backlit designs, edge-lit panels require more LEDs to emit the same level of lumens, raising the cost per fixture.

Due to the dispersion of light, Edge-lit is only suitable for a small area as it isn’t bright enough for a large room.

Edge-lit could turn yellow due to the thinness of the panel, which allows for heating of the LED models. It makes edge-lit have a shorter life span.

Back-Lit

Instead of LEDs placed on the edges that illuminate indirectly, Back-Lit Panels have LEDs on, the back of the frame. The LEDs are pointing directly out, shining light straight through the diffuser.

A back-lit LED panel is made of an array of LEDs fitted on a horizontal plate shining vertically down through a diffuser into the space to be illuminated. Back-lit panels are sometimes also known as direct-lit panels.

In backlit LED, there is no light guard. As a result of this, the light shines directly outward and does not need to be directed. The straight direct light does not cause a glare because the backlit LED also has a diffuser which smoothens the light. 

The directness of the LED light makes backlit more efficient than edge-lit. Unlike in edge-lit, where the light travels through the diffuser panel, light only passes through the thickness of the material in backlit.

Key Points:

Because light shines directly forward, there is no need for a light guide panel. Instead, this type of panel has a diffuser that still ensures smooth light without hotspots or glare.

Back-Lit Panels require a deeper housing to evenly illuminate the diffuser. They are about twice a thick as the Edge-Lit Panels and can only be installed grid (drop) ceilings.

The elimination of the LGP in back-lit designs means that the potential energy savings are greater than with edge-lit designs, if all other factors are equal.

When compared to edge-lit LED panels, the backlit design requires fewer LEDs, lowering the cost per fixture.

The Backlit has direct light and can be placed in high ceilings. 




Comments

Post a Comment

Popular posts from this blog

COB LED

Image
The latest LED improvement has been “Chip On Board” or COB innovation.  A COB (Chip-on-Board) is an LED packaging technology that describes mounting multiple LED chips directly onto a substrate to form a single module.    Multiple LEDs, minuscule in size, are wired and packaged together into a single ceramic or copper board so that they function as a sole light source. ​ They are sometimes nicknamed “fried eggs” (when they are not lit) because of their yellow phosphor circle on a white board. COBs are made up of multiple chips, usually with a minimum of 9 on a board.  Due to the small size of the LED chips (imagine a quarter), Chip-on-Board technology allows for a much higher packing density than surface mount technology (SMD). COB chips only have 1 circuit and 2 contacts, regardless of the number of the diodes. When a COB LED package is energized, it appears more like a lighting panel than multiple individual lights as usually the case with other LED packages, li...
Read more

DOB LED Lights

Image
A DOB "driver-on-board" LED light is an LED lighting system (either an LED bulb or an LED luminaire) that incorporates a light engine (driver-integrated LED assembly intended to operate directly on line voltage power) with an integrated on-board driver.  In conventional LED lighting systems the driver is typically separated from the LED assembly and fabricated on an FR4 printed circuit board (PCB). This configuration is based on the consideration that LED drivers have been dominantly designed as switching mode power supplies. SMPS drivers typically make use of bulky, expensive and unreliable reactive components such as inductors and capacitors. The use of reactive components necessitates a dedicated FR4 board which provide adequate routing layers for component interconnects. In an integrated lighting system, the considerable volume of a typical SMPS driver creates a need for an adequate space within the lighting system in order to accomm...
Read more

LED Bulb - Structure & Types

Image
LED light bulb  produces light using light-emitting diodes (LEDs). LED lamps are significantly more energy-efficient than equivalent incandescent lamps and can be significantly more efficient than most fluorescent lamps.                          We can put LED bulbs in regular lighting fixtures.  This includes fixtures that have previously used incandescent bulbs or CFL bulbs. After all, LED light bulbs are intended to replace old light bulb designs that are less energy efficient. Be sure to choose an LED bulb with a base, shape, and wattage that is compatible with the fixture. As LED bulbs are being manufactured in every possible design, it should easy to find the right fit for your lamp or chandelier. There are 2 types of LED Bulbs Driver LED bulb In these types of Bulb, a separate driver circuit is used for power supply. LEDs are mounted on separate chipset. DOB ( Direct On Board...
Read more