lcd display backlight supplier

Fusion Optix MicroTEK light guides for LCD backlighting offer some of the highest levels of efficiency and uniformity. All of our light guides will increase luminance uniformity to some degree; use diffusion films to eliminate LED “hotspotting” and dark regions in LCD backlights without affecting distribution.

Laptops, computer screens, tablets, notebooks. Is your display not lighting up? Maybe it is getting dim or even starting to have a reddish or pinkish hue, maybe it has completely gone dark. The good news: you need a new CCFL backlight lamp and we have them. We stock LCD backlight bulbs for most LCDs. The backlight repair is actually easier than you think, and once you replace the CCFL lamp in your LCD you have essentially restored your LCD display to new condition, as bright and vibrant as it was the first day you got it. And best of all, one less old LCD panel in a landfill somewhere! Call us today, we are here to help (402) 330-2222.

CCFL warehouse is the leading supplier and vendor direct to the largest department stores, grocery stores, and restaurant chains in the country. These companies purchase their CCFL lamps directly from us for use in their own POS repair facilities. We have replacement CCFL lamps in stock for all touch screen displays commonly used in POS cash registers and we stock them in large quantities.

Nearly every piece of Industrial equipment now made has an LCD control panel of some sort. Expensive equipment like CNC machines, heavy machinery, industrial control panels, medial and military displays, sewing machines, food processing equipment, you name it! What they also have in common is they are all heavily used and the LCD displays eventually fail. The equipment manufacturers charge exorbitant amounts for new displays, but the fact is all that is needed is new CCFL backlights. Install a new CCFL lamp assembly and your critical piece of equipment is back on line.

ATMs, amusement displays such as casino gaming, video games, juke boxes, and kiosks- these LCD displays are notorious for failure due to the 24 hour high demand usage. Again, a new CCFL lamp, and they are back up and running like new. CCFL Warehouse supplies CCFL backlights to many of the largest LCD display repair companies in the world. Our high-quality CCFL lamps are trusted for ultra long life in these demanding environments. If you do not find the exact CCFL lamp that you need on our website, drop us an email or give us a call, we will make it for you.

There is a reason all of the most respected LCD repair facilities in the country, both big and small, purchase their CCFL Backlight lamps from us, quite simply our expertise in the area of LCD backlights is simply unparalleled. Not only do we stock more cold cathode fluorescent lamps than any other company, produce the highest quality lamps, offer exceptional pricing, but we are here to help!

Quite simply, we are the experts in CCFL lamps and LCD backlighting, that is all we do and anything we can do to help you in your repair efforts we are more than happy to accommodate.

CCFLwarehouse.com is the single largest CCFL backlight supplier in North America. We specialize in CCFL lamps, producing the highest quality lamps available and stocking them in high volumes so that they are available for our customer when they need them. Our lamps are used all over the world by a wide range of clients, some just looking to get their laptop back up and running and others who operate some of the largest repair facilities in the world. Whatever your backlight repair needs, we can help.

Our CCFL lamps are designed specifically for repairs of LCD panels made by many of largest LCD panel manufacturers in the world such as: AU Optronics (AUO), Samsung, Sanyo, LG, Innolux, Torisan, Sharp, Che Mei, Chunghwa, NEC, Mitsubishi, Toshiba, Boe Hydis, Hitachi, Fujitsu, HannStar and many more.

In addition we stock LCD backlights specific for the repair of laptop and notebook computers and desktop monitors. Our CCFL lamps are used to repair LCD panels in all major computer brands such as; Acer, Asus, Gateway, Dell, Hewlett Packard (HP), Compaq, Lenova, Apple, Sony, BenQ, Alien Ware, Sager, Quanta, Clevo, and many more.

Edge Electronics provides LCD backlighting solutions for Active (TFT) LCDs. From power products like CCFL inverters, to LED driver boards and LED rails from top manufacturers, to fully custom high bright LED backlighting enhancements, we can help with all of your LCD backlight needs.

A leading China LCD Backlights manufacturer and supplier, Lucky Light Company located in the most advanced port city Shenzhen of China. We have a good reputation in our strict quality control. Furthermore, we have passed the ISO 9001 and QS 9000 certification in succession, which is the best proof of the high quality of our products, as well as the optimal quality guarantee to the customers. With the strict and ceaseless improvement of the product quality and service level, our products spread all over the world, and are affirmed by many large factories by persevering in the quality control. And we are sure that we will be also your perfect business partner in the near future.

Exceed Perseverance Electronic, founded in 1999, has thrived to the leading LED manufacturer and exporter. We mainly provide LED lamp, LCD Backlights, display, dot matrix, smd, super flux, power so on to some leading electronic companies in the world. All the advanced equipments are from Taiwan area and Japan, which assures to provide qualified products to our clients. This R&D team can develop a new model within two weeks, and at least 6 new ripe products each year. Additionally, we have an in-house QC department, including experienced engineers and specially-trained staff. Each process strictly follows ISO9001 standard. We would like to cooperate with any clients, together create the bright future!

electrical ( electric, electronic ) parts & components- (1) LCD module, LCD modules, LCD display modules, character LCD modules, character LCD display modules, graphic LCD modules, TN STN LCD modules, COB LCD modules, TFT LCD display modules, FSTN & CSTN LCD modules, liquid crystal display modules, LCM, COG LCM. (2) LCD panel, LCD panels, black mask LCD, LCD flat panels, LCD display panels, TN STN & TFT LCD panels, LCD backlight, LCD Backlights,

Jiangmen Changli Optoelectronic Technology Co., Ltd. is specializing in manufacturing optoelectronic products, such as LED light diode, LCD Backlights, high power all color lighting tube, 7-color LED flash lamp, LED & rear illuminating source, LED all color illuminating source tube, receiving tube, light sensitive diode, whole series digital tube, incorporate receiver and the like. We have the advanced equipments, like light-division & color-division machine and computer controlled testing machine for LED lighting diode, automatic ultrasonic wire-bonding machine, and excellent encapsulation equipments for diode and digital tube. We’ve achieved quality assurance certification to international standard ISO9001: 2000, and we strictly control the quality of products adhering to the requests of...

Since 1994, Palm Technology has been focused on the business of LCD & LCM manufacturing display products, including character alphanumeric LCD modules, LCD Backlights, monochrome graphic LCDs, static displays, TFT and custom LCD displays. We always aim to build a comprehensive, interactiveservice meant to manage all of a customer"s needs, enhancing the way wework, learn and live. To achieve this, we compiled a team that brings over 16 years of successful innovation in LCD & LCM electronics andcommunications. Our products have been widely applied in numerous fields, including solar, education, consumer electronically machine, medical, payment machine, meters and so on. If you are looking for a reliable LCD Backlights supplier in Taiwan, you could count Palm Technology. We welcome your any enquiry...

Manufacturer of electrical & electronic parts, computer & PC peripherals, including liquid crystal displays, LCD panels, LCD monitors, character LCD modules, LCD displays, TFT LCD, LCD TV, PDP display, PDP TV, digital light processing projector, rear-projection TV, backlight modules, etc. Certificated by ISO 9001 & ISO 14001. OEM orders are welcome.

Manufacturer of LCD Backlights, pure-green white-light lighting diodes, high-power all-color lighting tubes, high-power diodes, 7-color LED flash lamps, LED illuminating sources, LED all-color illuminating-source tubes, rear illuminating sources, infrared emissive diodes, receiving tubes, light-sensitive diodes, whole-series digital tubes, incorporate receivers. It has passed ISO9001:2000.

Manufacturer of LCD Backlights, LED Backlights, LEDs, LED traffic signals, display modules, backlight source, LED light modules, LED displays, LED illuminating, LED decoration serial products, infrared emitting diodes, numeric displays, clock displays, photodiodes, LED clusters, LED linear light sources, semi-conductor infrared receiving modules, tuners. It has passed ISO 9001 international quality system and ISO 14001 international environment certification and awarded as "the official example company of China Foreign Trade Enterprises Credit System".

LED LCD backlights are small light strips, or light sources, contained inside a display, TV, or monitor to provide lighting for the screen. All LED TVs are LCD panels with LED backlighting. A common misconception is that LED displays are different from LCD when fundamentally they are the same. LED is better described as a sub-set of LCD devices.

LCD is an acronym for Liquid Crystal Display, which is a type of monitor or screen—and flat-panel technology—that relies on thousands or millions of pixels, arranged in a rectangular grid. When an LCD is turned on, each pixel takes on a red, green, or blue sub-pixel (RGB) that is either enabled or disabled. When the pixels are off, the individual section appears black, and when all of the sub-pixels are on, it appears white. Collectively, the arranged pixels provide the sharp image on the display by being in either an on or off configuration.

The LED backlight illuminates the pixels, from behind, making them appear richer and brighter. Not all LCDs have a backlight, and for those that do, not all of them utilize LED backlighting. Some displays also use CCFL lighting or Cold-Cathode Fluorescent Lamps. Although, it should be noted that CCFL displays are being phased out in favor of LED-backlit panels.

The liquid crystals inside an LCD panel don’t have any illumination on their own and require the light to come from a separate component, which, in this case, is provided by the LED backlighting.

Older display types, such as cathode ray tubes (CRT) produce illumination already and so they do not need an additional light source like LCD devices.

While it can be confusing at first, LED-backlit panels are different from a full LED. LED-backlit panels have LED strips lining the edges of the screen whereas full HD illuminates the entirety of the display often with higher brightness and color accuracy. Full LED panels achieve this thanks to an evenly distributed light source across the rear of the set.

This changes the picture on the display, particularly when it comes to dark scenes and true black colors. On an LED-backlit display, for example, dark scenes may appear washed out because of how the light is focused on the edges and spreads thinly into the center.

Because both types are fundamentally LCD panels, both LED and LED-backlit displays produce bright and vivid pictures. However, scenes may appear brighter or slightly washed out, depending on how the light source is distributed, such as from edge backlighting versus evenly distributed lighting. If you prefer a more accurate picture, full LED panels are the way to go, but they are more expensive.

Similar to TVs and other displays, an LED-backlit LCD monitor is an LCD panel with LED backlights. What often sets a monitor or computer monitor apart from standard displays is they don’t include a built-in tuner, which is needed to access cable. They often include different video or display ports, such as HDMI, DisplayPort, VGA, and so on. They"re designed to be used as a primary or secondary display for desktop computers, laptops, and beyond.

LED-backlit TVs, monitors, and displays are used in many different places including ATMs, cash registers, digital billboards, fitness equipment like treadmills, vehicle infotainment systems, gas station pumps, Pachinko, and casino machines, mobile devices, and much more.

While all LED TVs are LCD TVs, not all LCD TVs are LED TVs. If a TV is marketed as LCD with no mention of LED, then it probably uses a different type of backlighting such as CCFL.

LCD displays don’t emit light by themselves. They need a light source, and LED backlights are now dominating the market. In this article, Orient Display’s Bill Cheung provides a complete overview of LED backlight technology, discussing different types, driver technologies, color deviation, brightness options and more.

LCD (liquid crystal display) has long been the dominant technology in the display world. Certainly, there are some emerging competing display technologies—such as OLED (Organic Light Emitting Diode) [1] and micro-LED—that have the potential to threaten LCD’s position in the market. But both are currently only used for niche and high-end markets.

An LCD display can’t emit light by itself. In order to have an LCD display [2] used in a dim environment, a backlight has to be used as the light source. There are a few different technologies that are able to produce backlight ranging from EL (electroluminescent), CCFL (cold cathode fluorescent lamps) and LED (light emitting diode). However, a breakthrough in blue LED technology by Shuji Nakamura [3] led to LED backlights dominating the market.

One of the greatest benefits of LED backlighting is its long lifetime. Normally, LED lifetime can be measured with half-life when the original brightness decreases by 50%. With different LED chip manufacturing materials, technologies and environment used, the LED life can vary from 20,000 hours to well over 100,000 hours.

LED backlights have low power consumption and produce much less heat than other backlight technologies, which extends the durability and performance of the other display components. Furthermore, this reduces the risk of fire and explosion. LED backlights are also driven with DC (direct current) and low voltage (can be as low as 1.5V), which are good for battery drive and emit no interference to the circuitry. With the development of LED technology, the LED chips become small. So, it is possible to produce very thin backlight (0.5mm thick or thinner).

Although white LED is the most popular color, LED backlight can be made into different single colors, bi-colors and tri-colors [4] (Figure 1) (Figure 2). With RGB LED backlight color mixing, normal 8 color LED backlight can be produced (Figure 3).

LED backlight can be classified as bottom (array) lit and side (edge) lit backlights, and each have their plusses and minuses. The advantages of the bottom lit (array) backlight are that it is uniform and bright. Its disadvantage is high current draw, thickness, heat dissipation and cost. Meanwhile, the advantages of the side lit backlight are its thinness, flexibility in design, low current and lower cost. The main disadvantage of the side lit backlight is its non-uniformity—hot spots can be seen from most of the side lit backlight from certain angle. Figure 4 compares the bottom lit and side (edge) lit backlight LCD types.

Now let’s look at LED backlight structures. An LED backlight can be simplified into layers starting with a LED chip, light guide, diffusor and reflector (Figure 5). This is the lowest cost structure. Except for some very low current efficiency LCD displays—such as utility meters, battery-powered clock, watch, GPS and so on—most LCD displays need backlights to be visible in the dim lighting. Most often the backlight is actually at the back of the LCD. In rare cases, this light can be done as front light. The traditional LCD structure with LED backlight shown in Figure 6.

Direct current driving: This is the simple and low-cost way to drive a LED backlight, however, be mindful of the current limit otherwise the LED life can deteriorate quickly. The solution is simply to add a current limiting resistor in the circuit. Current limitation resistors value calculation formula: R = (V0– Vf)/If.Also be mindful of reverse drive, otherwise, the LED chip can break down easily.

There are a variety of ways to connect a backlight and LCD module electrically. It can be done with wires that are soldered on the LCD or LCD module. It can be connected using pins, which can be soldered onto the LCD or LCD module. A third way is to use a FPC (flexible printed circuit), which can be soldered or plugged in a ZIF (zero insertion force) connector. And finally, there is the connector method. With this method you use connectors which can be plugged into mating connectors.

As the LED is manufactured via the semiconductor process, there are some color deviations that can be a quality control issue. One way to solve the issue is through a process of selection and sorting after manufacturing the LEDs. The LEDs are sorted into different categories or bins. How this sorting is done and what each bin actually contains is defined differently by each LED manufacturer. The backlight manufacturer can choose from which bin they take the LEDs for backlight color hue.

In actual LED backlight production, most customers will accept the LED color for two big categories: white with yellowish (warm) and white with bluish (cold). Of course, the LED brightness will also need to be defined. For general application, most customers will accept a brightness tolerance of 70 percent.

It is extremely hard to estimate the LED backlight lifetime or MTBF (mean time between failures) because there are so many variable factors. However, the most important is the temperature on the LED chip. The factors that can affect the LED chip temperature include: surrounding temperature, humidity, driving current, voltage, backlight design (how many LED chips to be used, how close to each other, heatsink design), backlight manufacturing process (type and thickness of adhesive), quality of the LED chip and so forth.

To test the LED life is also very time consuming, requiring at least 1,000 hours. That’s the reason why no LED manufacturers can guarantee LED backlight life and most backlight manufacturers also are reluctant to provide lifespan data. As for LCD manufacturers, they need to discuss it with the customer to understand the applications and provide suggestions. It is normal that the LCD datasheet lists the typical life time and avoids providing a minimum lifetime. From Figure 10, we can see that over room temperature, the current needs to decrease as the temperature increases. At over 85°C, the LED is not usable.

To estimate LED backlight lifetime, you can use ballpark estimation or theoretical calculation. Let’s first examine the ballpark method. To take white LED as example, the nominal biasing current is 20mA. If we use a safe lifetime estimation, we can estimate using Table 1.

Now let’s use the theoretical calculation approach. As we previously mentioned, LED life is affected by a lot of factors: surrounding temperature, humidity, driving current, voltage, backlight design (how many LED chips to be used, how close to each other, heatsink designed), backlight manufacturing process (type and thickness of adhesive), quality of the LED chip and so on. LED chip manufacturers are not willing to give absolute values of LED chip lifetimes, but there is a theoretical calculation that we can use.

Finally, let’s look at ways to increase LED backlight brightness. There are many ways to increase LED backlight brightness, but all these measures are balanced with performance and cost. Here are some of the methods:

For the LCD module side, using better aperture opening ratio, anti-reflection coating on surface, optical bonding. This results in higher cost. Actually, this measure is not to increase LED backlight brightness directly but to increase to the visibility to users.

Bill Cheung is an engineering lead and marketing manager at Orient Display, an LCD and display technology provider with over two decades of industry experience in delivering cutting edge display solutions. You can browse Orient Display"s knowledge base [7] to learn more about LCDs.