The LCD market is moving away from cumbersome stationary display equipment toward portable (often battery operated) display equipment. Thus the need for displays which consume less power and yet are more rugged to best handle the shock and vibration requirements of a portable equipment . To address the need for more portable, energy efficient, environmentally friendly LCD displays NEC has introduced a variety of displays incorporating LED backlight systems. LED-based LCDs offer distinct advantages over their CCFL counterparts that address most, if not all, of the requirements for portable display equipment. Advantages include:

• Low Voltage displays 
• Low EMI 
• No need for an inverter 
• Reduced power consumption 
• Reduced module thickness and weight 
• High reliability 
• Lower risk of damage to the display due to shock and vibration 
• LED’s are mercury-free and therefore more environmentally friendly than CCFL products 
  

Please read: NEC LED Press Release

Posted by: John Clauson

Original Post by Bob Waddell, Jan 8, 2009

Original Post by John Clauson, Jan. 8, 2009

The trend for LED backlights in TFT displays are increasing at a rapid pace. More and more suppliers are offering new LCD sizes and formats on a regular basis.

NEC is introducing 5 new TFT’s incorporating a newly designed LED units that achieve both long operating life of 70,000 hours and low power consumption in the backlight system.

2. Compatibility
Each of the new modules is compatible with NEC LCD Technologies’ conventional standard products of the same size in relation to outer dimensions, position of mounting holes, and screen center. Each also maintains signal compatibility with conventional products. Thus, the modules can be replaced easily without the need to change any of their peripheral appliances.

3. Wide operating temperature range
A wide operating temperature range, from –20 to +70 degrees Celsius, guarantees operation even in extreme conditions. Moreover, the luminance of the white LED backlight performs exceptionally well under low temperatures, even from initial startup.

Material referenced above can be found on NEC’s web site:

http://www.necelam.com/news/newsdetail.html?page=long_life_low-power_white_led_for_industrial_display#1

The main characteristics of the new modules are as follows:

1. Long-Life and Low-Power White LED Unit
The newly designed white LED unit, outperforms conventional cold-cathode fluorescent lamps (CCFL) with an operating life of 70,000 hours at room temperature (25 degrees Celsius). It reaches an operating life of 60,000 hours at a high temperature of 60 degrees Celsius, and boasts high reliability that is ideal for display devices in industrial equipment exposed to severe environmental conditions. All new modules reduce power consumption by more than 20 percent compared to conventional CCFL backlight systems.