edge lit led lcd panel supplier
Lightboxes can be built to your specifications regarding size, color temperature, and frame color. Single and double-sided [illuminated on the front and rear face] light panels are also available. Edge-lit panels are 8mm or about 1/3-inch thick a light panel including a flip-open frame [now called a lightbox] has a thickness of 0.625 to 1.50-inches. Illumination across the LED light panel from edge-to-edge is within 10% so a dark center is not a concern. Read more
Light panels have many uses in retail environments such as lighted shelves, signs or as a lightbox for photographic transparencies, stained glass and faux windows. For interior lighting applications, the panel performs well as a ceiling troffer, lighted wall, under cabinet light and under stone such as Onyx, quartzite or translucent man-made countertops. Read more
In signage, edge-lit panels can be a substitute for fluorescent tubes. Panels are thin, evenly illuminated and last for years without maintenance. Several color temperatures are available and RGB.
When displaying stained glass or some other translucent material in a window, you can use our clear edge-lit panel to let natural light through during the day and illuminate your art at night.
There’s lighting stores, and then there’s Lightology. Whether browsing online for outdoor lighting or stopping in our Chicago-based showroom to find the perfect desk lamp, Lightology is the premier destination for modern lighting, commercial lighting and home décor. Our knowledgeable staff are here to help you every step of the way, from dream to installation. The future never looked so bright.
Edge-lit LED panel lights consist of a row of LEDs attached to the frame (or perimeter) of the panel, which shine horizontally into the light guide panel (LGP). The LGP directs the light downwards and through the diffuser into the space below.
Edgelit LED panels are sometimes referred to as sidelight panels. Some offices or commercial buildings might prefer the thinner design and lighting effect that edgelit LED panel lights offer.
The local dimming on LED TVs is a key way of introducing contrast. With this technology, the intensity of lighting adapts to the image shown achieving contrast ratios.
LED-backlit LCD, which uses light-emitting diodes for backlighting is a common type of display on televisions and laptops. Unlike pure LED screens these LCDs are not self-illuminating and are reliant on the backlighting for illuminating the display. It is an advancement on the preceding cold cathode fluorescent technology and some manufacturers and retailers may advertise this type of screen as an LED TV.
Edge-lit is a type of screen backlighting that has LED lights lining either the top and bottom edges of the screen or the perimeter of the screen. This form of backlighting differs from others as the screen is not lit from behind, and often produces a more muted effect. An opaque piece of plastic called a diffuser light guide distributes the lighting across the rear of an LCD panel.
Edge-lit LEDs can be individually brightened or dimmed to provide the high degree of backlight control that screened content demands. Edge-lit screens can achieve this in one of two ways:
Direct-lit backlighting uses LED lighting across a television back panel. This form of backlighting initially used Cold Cathode Fluorescent Lamps (CCFLs) before transitioning to LED. The lighting is behind the LCD panel to provide consistent lighting across the entire screen.
The use of LEDs creates an extremely bright picture. This can lead to black and naturally dark tones appearing too bright, a phenomenon known as ‘elevated black levels’. This appearance can really affect wide-screed films, especially as there is no way to alter the backlight of specific portions of the screen. This has led to the development of alternative backlighting arrangements that minimize the greying of black sections of the screen.
Both types of backlighting provide the illumination LED screens required to produce a visible image. The main difference is that direct-lit backlights sit behind the LCD panel to provide the necessary lighting whereas edge-lit screens have LEDs sitting at the perimeter of the screen. Here are some other notable differences:
The first generation of LED backlighting was edge-lit. However, this early form of edge-lit technology caused the development of hotspots on the screen and the overall lighting was inadequate. As LED design became more efficient and effective, Samsung revisited this type of backlighting with a market-leading edge-lit LED television in 2009.
Direct-lit panels use a simple array of LEDs to provide uniform lighting across an entire LCD panel. The adoption of direct-lit screen technology in the 2000s was driven by the availability of white LEDs that could replace existing CCFL technology.
Direct-lit performs across a range of viewing angles and colors, but it is limited by not being able to increase contrast, as the entire backlight has to be dimmed to change color intensity. This affects the ability of a screen to achieve a deep black tone. Full array lighting and flexible backlight technologies have superseded direct-lit lighting. They are more advanced and can achieve more nuanced imaging effects.
Edge Lit screens can achieve full, deep blacks as they can use local dimming technology to reduce lighting in areas of the screen that display black or dark colors.
The TGS ThinTek™ G2 Edge Lit LED panel affords an efficient and elegant LED replacement for fluorescent lamps and troffer fixtures in offices, schools, hospitality, healthcare and other commercial and industrial applications. It provides flicker-free, uniform lighting, with a fully-integrated internal driver that allows bypass of existing ballasts for quick, easy and safe installation. Only 1.09” thick, the TGS ThinTek™G2 flat panel is equipped with an aluminum heat sink for advanced thermal control. Designed with high-quality, durable components, the panels can be surface, or recess for a contemporary or traditional look. Engineered with robust LEDs, the ThinTek™ G2 produces high lumen output and provides superior correlation to a wide range of selected color temperatures (CCT). The comprehensive spatial illumination provides a more natural light and creates stress-free environments. It is available in 1’x4’, 2’x2’ and 2’x4’ models, in 3000K, 3500K, 4000K and 5000K CCT. The TGS ThinTek™ G2 Edge Lit LED panel is Title 24 compliant, with full dimmable functionality, and is compatible with building controls, motion sensors, timers, and daylight harvesting systems. The ThinTek™ G2 panel is UL, cUL, and RoHS certified, and suitable for damp locations. It is backed by a 5 year/50,000 hour warranty for a long life of maintenance-free service. Recommended for indoor use only.Specification Sheet+ Save Product
When comparing different models of televisions, you might see the term "edge-lit LED." All LED TVs are a type of LCD TV; the "LED" refers only to the kind of lighting source used to illuminate the LCD pixels in the television. There is more than one way to light the pixels. The two primary technologies are edge-lit and full-array.
In an edge-lit television, the LEDs that illuminate the LCD pixels are located only along the edges of the set. These LEDs face inward toward the screen to illuminate it.
These models are thin and light at the mild expense of some picture quality—specifically in the area of black levels. Black areas of the picture, such as a dark night scene, are not truly black but more like a very dark gray since the lighting is coming from the edge and illuminating the dark areas a bit more.
In some poorer-quality edge-lit LEDs, uniform picture quality can be a problem. Because the LEDs are along the edges of the panel, quality declines as you approach the middle of the screen because a uniform amount of illumination is not reaching the pixels further from the edges. Again, this is more noticeable during scenes of darkness; the black along the sides of the screen is more gray than black (and corners can appear to have a flashlight-like quality of illumination emanating from the edges).
Full-array LED televisions use a full panel of LEDs to illuminate the pixels. Most of these sets also have local dimming, which means the LEDs can be dimmed in different regions of the panel while other areas are not. It helps improve black levels, which appear closer to black than dark gray.
In general, full-array LED is a superior technology when it comes to picture quality, but edge-lit sets have one significant advantage: depth. Edge-lit LED TVs can be much thinner than those lit with either a full LED panel or traditional fluorescent (non-LED) backlight. For that reason, most of the super-thin sets you see in stores will be edge-lit.
If you"re looking for the best possible picture quality, you are most likely to find it in a full-array LED display with local dimming. If you are primarily concerned about the appearance of the television and want an extremely thin screen, edge-lit is the style that will fit your needs.
LCDs need to be supported by additional lights because they don’t produce their light. To create this light, you can either use edge-lit LEDs or backlit LEDs. The primary difference between edge-lit and backlit LEDs is in the lighting is arranged. The light sources of Edge-lit displays are placed on a diffuser (usually thin) behind the LCD to create light dispersion.
The significant advantage of using an Edge-lit flat panel lights LED display is the reduced thickness. As a result of this, the displays are placed on Edge and not directly behind the LCD. It leads to the thinness of the diffuser. Most thin diffusers are usually edge-lit and not backlit, and they transfer the majority of the components to a big stand.
Switching from fluorescent troffer lights to LED troffer lights has its benefits, but the process could prove to be daunting and not so easy. You could either use Edge-lit panels or Backlit panels. Here are the significant differences between these panels.
Concerning the location of the LEDs, Edge-lit light panels are placed on the Edge of the frame. The light that emits is guarded by a light guard panel that directs it sideways. The light board is designed for the smooth and evenly distribution of light in a given space. The sleek look of the diffusers is a result of the small depth of the panel. The installation of Edge-lit can be done in a standard grid ceiling. And the sleekness and thinness of the board make it possible to install Edge-lit LEDs on walls and ceilings using suspension box or cable installation kits.
Backlit, as the name implies, is placed at the back of the frame instead of at the Edge. This position causes the LED to shine directly out, straight through the diffuser. 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 risk of yellowing of light guard is absent because there is no need for one. 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.
The disadvantage of Backlit is the thickness of its diffuser. You cannot install it just anywhere. It has to be installed in a drop grid ceiling. Although its panel is thicker than Edge-lit, it is still easy to operate due to its lightweight around its surface.
During the Consumer Electronics Show back in January, we noticed that some TV manufacturers were debuting LCD TVs with a new type of LED backlight, a direct-lit LED backlight.
At the time we didn"t know a lot about direct-lit LED backlights, but based on where these TVs were positioned in the manufacturer"s lineup—typically in or close to the entry-level series—it appeared that direct-lit LED backlight technology was able to bridge the price gap between lower-cost CCFL (fluorescent) backlights and the newer edge LED backlights that have become increasingly common in many LCD TVs. This year, for example, both Samsung (EH series) and LG (LS3400 series) are offering lower-priced LCD TVs with direct-lit LED backlights.
Most of the LCD TVs in our TV Ratings now come with edge LED backlights, where the LEDs are arrayed around the perimeter—typically the sides—of the TV. A waveguide (or lightguide, or diffuser) then spreads the light across the entire panel, hopefully in a uniform fashion.
The other type of LED-based backlighting we"ve seen—now less common—is a full-array LED backlight, where rows of LEDs are spread across the entire back panel of the TV. Using a feature called local dimming, the LEDs are divided into a number of zones that can be individually controlled, so some portions of the backlight can be dimmed while other remain illuminated. In some instances, we"ve seen this improve contrast and black levels. Some edge LEDs also have a form of local dimming, but this has had a negligible effect on contrast or black levels on most of the TVs we"ve tested.
Direct-lit LED backlights are an offshoot of full-array backlighting, in that they use LEDs spread across the entire back panel of the TV. (The TV"s spec page may just refer to these TVs as having a full-array backlight.) However, there are a few key differences compared to the more expensive full-array LED sets we"ve tested previously. One is that they use significantly fewer LEDs across the back of the panel. Another is that these sets lack the local dimming feature.
In addition, these TVs are much deeper than previous LED-backlit models, especially the ultra-thin edge LED sets. In fact, they more closely resemble LCD TVs with CCFL backlights. The reason: Because fewer LEDs are used, they have to be moved farther away from the screen to provide adequate light coverage across the panel, much the way the beam of a flashlight gets wider as you move it away from an object.
But the primary reason we"re seeing direct-lit LED backlights is price. Though they do cost a bit more than CCFL models, they"re less expensive than edge LED models, since they don"t require the lightguide plates. And in a tough economy, this lets manufacturers offer less-expensive models without having to forgo what has become perceived as a key LCD feature—an LED backlight. Although direct-lit LED backlights are no slimmer than CCFL-based LCD TVs, they do offer an advantage over models with fluorescent lights: better energy efficiency.
We"re currently testing a few Samsung models that use direct-lit LED backlights, so make sure to check out our TV Ratings in the next week or so to see how these sets fared. We"ll also be watching the market to see if more manufacturers embrace this type of backlight in their lower-priced LCD TV models.
Modern LCD TVs rely on LED backlighting to produce the visuals you see on the screen. But their picture quality and price can differ based on their backlighting system. So, what are these backlighting systems, and how are they different?
LCD TVs can be grouped into three categories based on the type of LED backlighting system: Direct-lit, edge-lit, and full-array. As the name suggests, direct-lit TVs feature a panel of LEDs placed directly behind the display stack. Full-array TVs have a similar LED placement, but the number of LEDs is significantly more, and these LEDs are divided into different zones. But unlike both direct-lit and full-array TVs, edge-lit TVs have LEDs on the perimeter, and depending on the TV, these LEDs may or may not be grouped into multiple zones.
The LED backlight zones in full array and edge-lit TVs are significant as they enable the manufacturers to implement a feature called local dimming. It allows TVs to control the backlight on a scene-by-scene basis. So the TV can turn off LED backlighting in parts of the screen where it’s supposed to be darker while keeping other parts lit. As a result, LCD TVs with local dimming can produce deep, uniform blacks and have a better contrast ratio than the LCD TVs that don’t have this feature.
Direct lighting is the newest of the three types backlighting in LCD TVs. The first commercial direct-lit LCD TVs emerged around 2012 and are essentially an off-shoot of the full-array TVs.
As direct-lit TVs require fewer LEDs and no backlight control, they are cheaper to produce and thus typically limited to the entry-level and mid-range segments of a TV manufacturer’s portfolio.
But, the lower number of LEDs also means they have to be placed farther away from the screen to offer sufficient light coverage across the panel. As a result, direct-lit TVs are usually thicker than TVs with other backlighting systems.
Additionally, the lack of backlight control limits the contrast ratio of direct-lit LCD TVs to the native contrast ratio of the panel. So if a direct-lit TV uses a VA-type LCD panel, it will have a reasonable contrast ratio, but TVs with IPS-type panels have a poor contrast ratio.
Sony X85J is a direct-lit 4K LCD TV. It uses a VA-type panel and comes with features like HDMI 2.1 ports, VRR support, and Android TV operating system.
Edge LED backlighting first appeared in TVs in 2008, allowing for a thinner profile than LCD TVs with other backlighting solutions. But as the LEDs are placed on the rim of the screen, edge-lit TVs require a diffuser to light up the entire display adequately. This adds to their cost, making them slightly more expensive than direct-lit TVs. But given that backlighting is just one part of an LCD TV’s cost, you will find both cheap and costly edge-lit TVs on the market.
Some edge-lit TVs also come with local dimming support. But the number of backlight zones is typically far lower than in full-array TVs, and the individual LEDs are responsible for lighting up entire columns of the screen. So edge-lit local dimming is much less precise, and the benefit in terms of contrast ratio is minimal.
Full-array TVs have the best backlight implementation among LCD TVs. Not only do these TVs have a large number of LEDs, but the LEDs are also divided into multiple zones for dynamic backlight control. So, depending on the number of backlight zones and local dimming implementation, full-array TVs can have modest to excellent improvement over the native contrast ratio of the LCD panel.
Unfortunately, LCD TVs with full-array local dimming can also suffer from various screen artifacts, such as blooming and black crush, depending on the number of backlight zones and the overall local dimming implementation.
The Samsung QN90A is one of the best LCD TVs on the market and it uses full-array local dimming. The TV has 4K resolution, HDMI 2.1 port, and a 120Hz VA-type panel.
If you are shopping for a new TV and curious about its backlighting system, you can consult the TV’s specifications. Manufacturers generally mention whether an LCD TV is direct lit, edge lit, or full array. In the case of full-array TVs, the number of local dimming or backlight control zones is also listed in the TV’s specifications. This number is usually different for different sizes of a particular TV and can impact the amount of contrast ratio gain you can expect.
OLED TVs are self-emissive and don’t need a backlight, unlike LCD TVs. Instead, each pixel of an OLED panel can generate its own light and be switched off to display the perfect black color. So, OLED TVs essentially offer pixel-level local dimming. As a result, they have a near-infinite contrast ratio and are generally considered to have the best picture quality. But they are also typically more expensive than LCD TVs and can suffer from burn-in.
All-in-all, the backlight system of an LCD TV can impact its picture performance. And if you are shopping for a new TV, full-array TVs generally have the best picture quality. But if you are restricted by your budget, direct and edge-lit TVs can also deliver good visual performance. But make sure to read expert reviews to get a better idea about the overall quality of a particular television.
Image at bottom left: An edge-lit LED/LCD TV light guide plate. The grid of reflective bumps help distribute light from the screen"s edges towards its center.
Edge-lit LED/LCD TVs are simpler and generally less expensive to manufacture than fullarray models. According to research firm DisplaySearch, the actual cost of materials can be 30% to 40% less. Edge-lit TVs have white LEDs implanted all around the bezel, behind the LCD panel. The LEDs are positioned so that the light beams sideways toward the screen"s center, parallel to it and perpendicular to the line between viewer and screen.
The light guide plate, a large sheet of reflective material that"s covered with tiny convex bumps, reflects the side-fired light at a 90° angle so that it passes through the LCD panel to the viewer. The bumps are taller toward the center of the screen, where light coming from the LEDs is weakest; these higher bumps have a higher reflectivity to make up for the weaker light in the center. Because the light guide plate contains many thousands of reflective bumps, most edge-lit sets need no diffuser panel. The LEDs illuminating an edge-lit LCD can be also dimmed to produce deeper blacks, but they can be dimmed only as a group, not individually.
The advantage of edge-lit LED/LCD TVs is that they can be made exceptionally slim. For example, the latest Samsung models measure 1.2 inches thick - much slimmer than the 4-inch-thick LCD TVs of just a few years ago. However, the company"s recent full-array models are almost as slim, measuring a mere 1.5 inches thick. As Jonas Tanenbaum, Samsung vice president of LED and LCD marketing, says, "Edge-lit may always enjoy an advantage in slimness, but once you get to a 1.5-inch depth [with a fullarray TV], how perceptible is that extra 0.3 inches?" Because edge-lit TVs use fewer LEDs and no diffuser screen, they also tend to be more energy-efficient than full-array TVs, despite the fact that the LEDs in an edge-lit TV can"t be dimmed locally.
The main disadvantage of edge-lit LED/ LCD TVs is that they usually can"t match the extremely high contrast ratios achieved by full-array TVs. They can also suffer image uniformity problems stemming from imperfect light plate designs that don"t evenly distribute the light from the LEDs, and from mild "hot-spotting" caused by the lack of a diffuser. However, you wouldn"t notice the latter two issues except in certain situations, such as movie scenes that fade to black.
Videophiles generally consider full-array LED/LCD TVs to offer better picture quality because of the deeper blacks created by local dimming. But the point is debatable. In many movies and TV shows, you would appreciate the potentially lower black level of fullarray TVs in only a few scenes - and in those scenes, blooming may be visible. Edge-lit TVs can actually deliver better contrast in certain situations and scenes, because while the shadow depth may be somewhat less than with a full-array model, white highlights in the picture can also be brighter due to the set"s greater efficiency.
Edge-lit displays may also offer somewhat smaller viewing angles compared with full-array models, because the light coming from the LED array through those sets" diffuser panel is more broadly distributed than the light coming off the reflector bumps on a light guide panel. Thus, an edge-lit TV"s brightness may drop off a bit if you"re viewing it from an angle. Neither technology, though, can match the broad viewing angle of a plasma TV.
You may cancel your Mulberry Protection Plan within 30 days of purchase by contacting Post Up Stand at 1-800-935-3534. If there has been no claim filed against the plan, the plan will be void and you will receive a full refund.
An LED-backlit LCD is a liquid-crystal display that uses LEDs for backlighting instead of traditional cold cathode fluorescent (CCFL) backlighting.TFT LCD (thin-film-transistor liquid-crystal display) technologies as CCFL-backlit LCDs, but offer a variety of advantages over them.
While not an LED display, a television using such a combination of an LED backlight with an LCD panel is advertised as an LED TV by some manufacturers and suppliers.
A 2016 study by the University of California (Berkeley) suggests that the subjectively perceived visual enhancement with common contrast source material levels off at about 60 LCD local dimming zones.
LED-backlit LCDs are not self-illuminating (unlike pure-LED systems). There are several methods of backlighting an LCD panel using LEDs, including the use of either white or RGB (Red, Green, and Blue) LED arrays behind the panel and edge-LED lighting (which uses white LEDs around the inside frame of the TV and a light-diffusion panel to spread the light evenly behind the LCD panel). Variations in LED backlighting offer different benefits. The first commercial full-array LED-backlit LCD TV was the Sony Qualia 005 (introduced in 2004), which used RGB LED arrays to produce a color gamut about twice that of a conventional CCFL LCD television. This was possible because red, green and blue LEDs have sharp spectral peaks which (combined with the LCD panel filters) result in significantly less bleed-through to adjacent color channels. Unwanted bleed-through channels do not "whiten" the desired color as much, resulting in a larger gamut. RGB LED technology continues to be used on Sony BRAVIA LCD models. LED backlighting using white LEDs produces a broader spectrum source feeding the individual LCD panel filters (similar to CCFL sources), resulting in a more limited display gamut than RGB LEDs at lower cost.
Using PWM (pulse-width modulation), a technology where the intensity of the LEDs are kept constant but the brightness adjustment is achieved by varying a time interval of flashing these constant light intensity light sources,
A first dynamic "local dimming" LED backlight was public demonstrated by BrightSide Technologies in 2003,Sony in September 2008 on the 40-inch (1,000 mm) BRAVIA KLV-40ZX1M (known as the ZX1 in Europe). Edge-LED lighting for LCDs allows thinner housing; the Sony BRAVIA KLV-40ZX1M is 1 cm thick, and others are also extremely thin.
LED-backlit LCDs have longer life and better energy efficiency than plasma and CCFL LCD TVs.mercury, an environmental pollutant, in their manufacture. However, other elements (such as gallium and arsenic) are used in the manufacture of the LED emitters; there is debate over whether they are a better long-term solution to the problem of screen disposal.
Because LEDs can be switched on and off more quickly than CCFLs and can offer a higher light output, it is theoretically possible to offer very high contrast ratios. They can produce deep blacks (LEDs off) and high brightness (LEDs on). However, measurements made from pure-black and pure-white outputs are complicated by edge-LED lighting not allowing these outputs to be reproduced simultaneously on screen.
Quantum dots are photoluminescent; they are useful in displays because they emit light in specific, narrow normal distributions of wavelengths. To generate white light best suited as an LCD backlight, parts of the light of a blue-emitting LED are transformed by quantum dots into small-bandwidth green and red light such that the combined white light allows a nearly ideal color gamut to be generated by the RGB color filters of the LCD panel. In addition, efficiency is improved, as intermediate colors are no longer present and do not have to be filtered out by the color filters of the LCD screen. This can result in a display that more accurately renders colors in the visible spectrum. Companies developing quantum dot solutions for displays include Nanosys, 3M as a licensee of Nanosys, QD Vision of Lexington, Massachusetts, US and Avantama of Switzerland.Consumer Electronics Show 2015.quantum dot displays at CES 2017 and later formed the "QLED Alliance" with Hisense and TCL to market the technology.
Mini LED displays are LED-backlit LCDs with mini-LED–based backlighting supporting over a thousand full array local dimming (FALD) zones, providing deeper blacks and a higher contrast ratio.
LED backlights are often dimmed by applying pulse-width modulation to the supply current, switching the backlight off and on more quickly than the eye can perceive. If the dimming-pulse frequency is too low or the user is sensitive to flicker, this may cause discomfort and eyestrain similar to the flicker of CRT displays at lower refresh rates.
Novitsky, Tom; Abbott, Bill (12 November 2007). "Driving LEDs versus CCFLs for LCD backlighting". EE Times. Archived from the original on 28 November 2010. Retrieved 21 November 2020.
LED TVs: 10 things you need to know; David Carnoy, David Katzmaier; CNET.com/news; 3 June 2010; https://www.cnet.com/news/led-tvs-10-things-you-need-to-know/
LCD Television Power Draw Trends from 2003 to 2015; B. Urban and K. Roth; Fraunhofer USA Center for Sustainable Energy Systems; Final Report to the Consumer Technology Association; May 2017; http://www.cta.tech/cta/media/policyImages/policyPDFs/Fraunhofer-LCD-TV-Power-Draw-Trends-FINAL.pdf Archived 1 August 2017 at the Wayback Machine
Polarisation-sensitive beam splitter; D.J. Broer; A.J.S.M. de Vaan; J. Brambring; European patent EP0428213B1; 27 July 1994; https://worldwide.espacenet.com/publicationDetails/biblio?CC=EP&NR=0428213B1&KC=B1&FT=D#
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