ccfl backlight lcd panel brands

LED (light emitting diode) backlights are the most popular type of backlight for small and medium LCDs. A new trend has begun where even large displays such as laptops, desktop monitors, and LCD TVs have LED backlights. The advantages of LEDs are its low cost, long life, no EMI interference, low operational voltage, and ease of brightness control. One disadvantage in larger displays is that too many LEDs increase the power consumption and will generate heat as a result. However, this problem will soon be overcome.LED backlights come in several different colors: yellow-green, orange, amber, pure green, blue, and white. There are two basic LED backlight designs: Bottom (array) and edge lit. The bottom (array) lit configuration has several LEDs mounted uniformly behind the display, which provides uniformity and brighter lighting, but also consumes more power and requires thicker LED backlights. The edge-lit configuration consists of LEDs mounted to one side or corner, which offers a thinner package and consumes less power. The edge-lit design occupies 98% of the LED backlight market for small to medium LCD modules.

Electroluminescence Backlight, or EL Backlight, is a solid-state phenomenon which uses colored phosphors, not heat, to generate light. EL backlights are very thin, lightweight and provide an even light. They are available in a variety of colors, with white being the most popular for use with LCDs. While their power consumption is fairly low, they require voltages of 100 VAC @ 400Hz. This is supplied by an inverter that converts a 5, 12 or 24 VDC input to the AC output. EL backlights also have a limited life of 3,000 to 5,000 hours to half brightness. The biggest drawbacks to an EL panel is that it requires an inverter to generate the 100VAC, consistent brightness, and limited life.

Cold Cathode Fluorescent Lamp, or CCFL, backlights offer low power consumption and a very bright white light. The primary CCFL configuration used in LCD backlighting is edge lighting. A cold cathode fluorescent lamp is the light source with a diffuser distributing the light evenly across the viewing area. CCFLs require an inverter to supply the 270 to 300 VAC @ 35KHz used by the CCFL tube. They are used primarily in graphic LCDs and have a longer life – 10,000 to 20,000 hours – than EL backlights do. Their biggest drawbacks are: cold weather will reduce the light output by as much as 60%, they require an inverter to generate the 350VAC please note that the inverters do not function well at low temperatures, the light intensity cannot be varied (it is either on or off), and vibration can reduce the life expectancy of up to 50%.

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.

The local dimming method of backlighting allows to dynamically control the level of light intensity of specific areas of darkness on the screen, resulting in much higher dynamic-contrast ratios, though at the cost of less detail in small, bright objects on a dark background, such as star fields or shadow details.

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.

The evolution of energy standards and the increasing public expectations regarding power consumption made it necessary for backlight systems to manage their power. As for other consumer electronics products (e.g., fridges or light bulbs), energy consumption categories are enforced for television sets.

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.

Controlling Power Consumption for Displays With Backlight Dimming; Claire Mantel et al; Journal of Display Technology; Volume: 9, Issue: 12, Dec. 2013; https://ieeexplore.ieee.org/document/6520956

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

Liquid Crystal Display which is an electronically visual way to display an image using light modulating properties of liquid crystals (LC’s). Basically, there is a thin panel filled with LCs that display a video or still picture (graphic) image electronically. As cool as this sounds, the LCs do not emit light directly (they don’t have a natural light source) so you can’t really see what the LCs are showing very well. To create an LCD panel, a backlight is added to provide a light source for the LCs, and it is this illumination that ‘adds’ light to the LCD to produce a visual image. The backlight illumination can come from behind the LCs, which is called Direct lighting or from the side which is called Edge lighting. Direct lit illumination provides more brightness but it increases the depth of the TV/monitor and it is more expensive. Edge lit backlighting is effective at lighting the LCs at a lower cost, and takes less depth so the LCD monitor looks more sleek.

1. CCFL (cold cathode fluorescent lamps) which was the first type of LCD backlight and it is quickly being replaced by the 2nd type of backlight because it is simply better.

2. LED (light-emitting diodes) is the newer type of LCD backlight which has become predominantly the primary LCD backlight source in LCD monitors today. LED backlights are better than CCFL as they are brighter, they take less energy, and LEDs last longer. Why wouldn’t one use an LED backlight? No reason.

Since LCD-type technology for monitors and TVs appears to be never-ending like it is for all technology, you may have started noticing more options in the market for (AM)OLED and QLED (Quantum dot) monitors. We will cover this new technology in another post.

This is our newest generation of CCFL; they don’t just produce a higher brightness and contrast, but they are also made by precise precision color matches. After the backlight replacement, the image should look brighter and clearer.

We have received many requests for LCD’s that contain a CCFL backlight (aka: cold-cathode fluorescent lamps backlight). We are finding it more and more difficult to supply a CCFL backlight.

The Liquid crystal displays we talk about in this article are monochrome LCD displays; this includes alphanumeric LCD displays and graphic displays. We do not cover TFT LCD’s or OLED’s in this discussion.

Does not provide as even light on larger displays as a CCFL. On a larger display it may be possible to see hot and cold spots. (Although a diffuser can help to reduce this)

An estimated 80% of our character LCD displays are supplied with LED backlight or LED edge lit. 15% of alphanumeric LCD displays are supplied with no backlight. The last 5% of numeric LCD displays are supplied with EL backlight.

8x1 LCD display, 8x2 LCD display, 16x1 LCD display, 16x2 LCD display, 16x4 LCD display, 20x2 LCD display, 20x4 LCD display, 24x2 LCD display, 40x1 LCD display, 40x2 LCD display, 40x4 LCD display.

Segment Display’s do not contain a backlight as a standard option. It is possible to order a separate backlight. This would need to be ordered as a custom LCD module. See

There are many LCD screen manufacturers for the Laptop Industry. LCD screens have different resolutions, size and type and these screens are compatible as long as the resolution and connections are the same.

For this listing, we will ship you a brand new OEM Compatible LCD screen manufactured either by Samsung, LG, Chi Mei, Chunghwa, Sharp, or AUOptronics. For more information about each LCD manufacture please click here.

If you wish to know the make of the actual LCD that will be shipped to you, please contact us by phone with your order information between 10AM - 8PM EST (Monday – Friday).