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LQ121X3LG02 Industrial Display

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HAMBURG, Germany, July 30, 2010 — Sharp Microelectronics Europe GmbH is presenting a new industrial display with a screen diagonal of 30.7 cm and LED backlighting with high brightness of up to 1200 cd/m². XGA resolution is 1024 × 768 pixels.

The LQ121X3LG02 produces a contrast ratio of 1000:1, making it suitable not only for industrial applications such as measurement, testing or controlling equipment, but also for applications that are either totally or partially outdoors, where requirements include being able to withstand difficult light conditions such as direct sunlight or fluctuations in temperature.

The backlighting of the LQ121X3LG02 with 5 × 8 LEDs offers numerous advantages compared to displays with cold cathode fluorescent lamp backlights, such as rapid response and good dimming capability. The display brightness can be easily controlled by photodiodes and automatically adjusted in correlation with ambient light conditions, meaning that the display remains constantly and easy legible, even in frequently changing light conditions. LEDs are also more mechanically robust because they are less breakable than the glass bodies of cold cathode lamps. This makes mechanical design simpler and increases resilience.

At ambient temperatures below 0 °C, LED backlights can achieve a service life of up to 200,000 h and provide full light output as soon as they are switched on. In the case of higher temperatures, however, LEDs are sensitive. A strong local heat build-up on the lighting modules must be discharged effectively, as it can damage the LCD panel and the backlighting itself, which would lead to a significant reduction in service life. The company has developed a special chassis for LED backlit industrial displays, in which the LEDs of the backlight are thermally coupled directly to the mechanical parts of the module. Waste heat is efficiently discharged into the environment via the rear of the display, ensuring that there is no damaging heat accumulation, even at high ambient temperatures.

With an operating temperature of -20 to 60 °C, the display is suited for both indoor and outdoor use. It measures 163 ×104 × 6 mm, has an LVDS interface, offers a minimum service life of 50,000 h and operates on a supply voltage of 3.3 VDC.

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Jul 2010
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