Archive for April, 2011

Term of the Day: LC Filling

Written by screentekinc. Posted in Term of the Day

TOD Feature This module fills empty cells with liquid crystal material. Several different modules are available dependent on cell size and volume/batch size requirements. Combined models integrated with pre-bake before filling is also available. Once again, by innovation in combining processes we have developed combination fill modules with integrated pre-bake chambers. These combination fill modules significantly reduce fill process cycle time while improving process yields. The FI-230-X2 preheats the empty cells in a separate chamber and then automatically transfers them into the fill chamber where the filling takes place. This process avoids heating the temperature sensitive LCD material and eliminates environmental contamination between processes. The module consists of two vacuum chambers with a transfer door in between; this reduces cycle time by heating the cells during filling and removing moisture during pre-heating. The filling process is made without a conventional wick, which makes the process clean and reduces the waste of LC-material. There is easy access to the cassettes and the filling bath from the top of the machine.

What’s the Difference? CCFL vs LED

Written by screentekinc. Posted in Tech Musings

led_ccfl We ship out thousands of replacement screens to our customers every month. A lot of questions arise when replacing a laptop screen, but one of the most frequent is whether you need a replacement panel with a CCFL backlight or an LED backlight and how to figure out which type is in your laptop. It’s important to know the difference since CCFL and LED screens are not interchangeable. Your laptop is designed for one type of backlight, so it’s either a CCFL panel or an LED panel. We want to sort out any confusion on the matter so we’re going to break down the differences in these two panels. Your laptop screen is made of a liquid crystal display (LCD) panel, but this panel does not produce light on its own. The LCD needs a light source to illuminate images for them to be visible on the screen. This illumination is created with a backlight. The backlight is referred to as a backlight because it is positioned on the back or side of the LCD panel. Component manufacturers are so clever when naming pieces, aren’t they? A backlight is built into an LCD panel and typically forms the last layer of the LCD screen. LCDs have lots of layers,  like an onion. The light source in the backlight is made of one of the following: -Cold Cathode Fluorescent Lamp (CCFL) -Light-Emitting Diode (LED) Now, there are a couple of ways to identify which type of backlight you have in your laptop. LED screens perform very well in direct light, if your screen has fantastic visibility in sunshine it may very well be an LED backlight. Age is another pretty good indicator – LEDs are a relatively new adoption in laptop technology, so if the laptop in question is more than a year or so old chances are you’re working with a CCFL backlight. To be absolutely sure you order the right LCD panel replacement, check the manufacturer’s website for your laptops specifications. Many models of laptops come in both a CCFL model and an LED model – a tip: the LED will be the more expensive model since this technology is still “new” in laptops. Maybe you’re considering a purchase between a traditional CCFL backlight laptop or an LED backlight laptop. We’ve put together a helpful comparison chart.
  CCFL LED
Size Thicker and heavier Thinner and lighter
Cost Cheaper and more cost effective More expensive, but are becoming more affordable as more laptop manufacturers are using LED backlights
Power Higher power consumption and heat generation Lower power consumption and heat generation
Brightness Lower brightness Generally higher brightness – much better for use in direct light
Finish Available in Matte or Glossy Available in Matte or Glossy
Lifespan Shorter lifespan Last longer than CCFLs
  We hope this makes understanding the difference between CCFL and LED backlights easier!
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