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Optoelectronics/Displays??

TFT LCD modules feature replaceable LED backlights

Posted: 12 May 2008 ?? ?Print Version ?Bookmark and Share

Keywords:active-matrix TFT-LCD module? LED backlighting?

TAEC TFT-LCDs

Toshiba America Electronic Components Inc. (TAEC) has rolled a new color active-matrix TFT-LCD module product lineup for industrial applications that incorporates long-life LED backlighting systems.

Developed by Toshiba Matsushita Display Technology Co. Ltd, the modules are designed to meet the requirements of a broad range of industrial applications, such as test and measurement equipment, medical equipment and portable handheld computing devices utilizing the latest LED backlighting technology.

The series includes five new LCD products: 5.7-inch QVGA 320 x 240, 6.5-inch VGA 640 x 480, 8.4-inch SVGA 800 x 600, 8.4-inch 1,024 x 768, and 10.4-inch XGA 1,024 x 768. All the products have replaceable, long-life, LED-based backlighting systems, and are designed such that a resistive touch panel can be added as an option.

The LED-based backlighting systems provide an average backlight lifetime of 70,000hrs, or 8 years of continuous operation, (to half-brightness of the initial luminance specification), which exceeds that of today's common TFT LCDs for industrial applications using long-life CCFL backlighting systems. TMD has achieved this by applying long-life LEDs, and by optimizing the thermal design of the industrial-type LED-based backlighting system based on TMD's extensive experience in using LED backlighting for mobile notebook PC TFT displays. The modules have been designed with a replaceable backlight structure to accommodate the product longevity requirements, and the harsh-usage environments, of industrial applications. In addition, TMD has added the LED driver circuitry into the electrical interface for the displays, an added benefit for customers to simplify their design-in time and costs.

Compared to CCFL backlit displays, LED-backlit displays feature superior characteristics such as lighter weight, lower electrical noise, lower power consumption, and offer a wider adjustable luminance range.LED-backlit displays also reduce the environmental impact, in consideration of both material and energy consumption, since they are mercury-free and lower in power consumption. Also, the new LED-backlit displays do not require the high-voltage and high-frequency circuits required to control luminance in CCFL-backlit displays, thus enabling a higher level of flexibility in system design in terms of safety, EMI compensation and system architecture.

Samples are now available. Information on pricing and scheduled mass production is available from TAEC.





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