Solid Performance in LED-backlit LCD Displays for Industrial Applications

Sharp brings you ongoing technological advancement

Sharp has chosen to incorporate LED backlighting into our new LCD module designs. This brings a significant upgrade to industry leading displays which already combine all the most requested features: wide operating temperature range, exceptional shock and vibration tolerance, high brightness and contrast and long life cycles. Sharp’s displays are priced attractively and are available to design into your applications today.Every display is supported with detailed specifications, UL parts list, Reliability Test Reports, and CAD drawings and Sharp also employs local Field Technical Managers who are able to help you with your designs.All of our LED-backlit industrial displays have the same feature set as our current industrial displays and add:

• Long product lifecycles
• Long lifetime
• Backlights illuminate quickly and rapidly to achieve stable brightness
• Wide dimming ratio (to <1%)
• Low electrical noise (low DC drive voltage)
• No hazardous material (Hg)
• Strong to withstand mechanical shock (no glass tubes)

Sharp’s commitment to the industrial applications market continues in 2010, adding these unique LED-backlit displays to our overall product lines:

• 3.0” WQVGA (transflective) 13% reflectance, 150 nits (samples Q4 ’09, production Q1 ’10)
• 5.0” WSVGA, with and without integrated touch panel, 280/430 nits (samples now, production Q4 ’09)
• 5.7” QVGA, integrated touch panel, 320/400 nits (samples now, production Q4 ’09)
• 10.2” WSVGA, wide viewing angle, 350 nits, contrast ratio 2000:1 (samples Q4 ’09, production Q1 ’10)
• 12.1” XGA, high brightness 1500 nits (samples now, production Q2 ’10)
• 12.1” SVGA, LVDS interface, 450 nits, 70,000 hour backlight (samples now, production Q4 ’09)
• 15.0” XGA PSWG, 400 nits, wide viewing angle (samples Q1 ’10, production Q2 ’10)
• 19.0” SXGA, high brightness 1000 nits, wide viewing angle (samples Q2 ’10, production Q3 ’10)
• 21.5” FHD, 250 nits, contrast ratio 1000:1 (samples Q4 ’09, production Q1 ’10)

FEATURES, BENEFITS, AND APPLICATIONS:

Microtip's new extended-temp 7.0-inch TFT

MTF-TW70SN731-LB (aka UMSH-8013MD-1T)

• 7.0” Digital TFT available with and without Touch Screen
• Outline dimensions are 164.0(W) x 104.0(H) x 6 (D)mm
• 16×9 Aspect Ratio
• -30°C to + 80°C operating temp
• Resolution is 800 x RGB x 480 dots.
• LVDS interface and built-in voltage board (V-Com, T-Con, DC/DC)
• LED backlight is 500 Nits

 Other information:

 LVDS (Low Voltage Differential Signaling) – serial data transfer

• Pros: high noise immunity and low noise generation, good for long distanced between LCD and controller, quicker data transfer over fewer data lines, generally lower power consumption
• Cons: two wires required for each data transmission

This panel is ideal for any application that requires extended temperature specs, including automotive, industrial and military.

Posted by Steve Gereb, March 6th, 2009

For more information on this panel or related Microtips products, please visit www.embeddedcomputingsystems.com.

PanJit is a leading edge designer and manufacturer of Resistive, Matrix and Capacitive Touch Screens. Servicing various market segments and applications, including Military Notebooks/Tablets, GPS, Industrial Controls, Medical, IPC, Mobile Phone, PDA, Kiosks, PC, POS, just to mention a few.

PanJit offers a full range of Capacitive, Standard 4, 5 and 8-Wire Resistive and Matrix Touch Screens, as well as Controllers. PanJit’s Sunlight Readable sensor is the ultimate Touch Screen made for all kinds of outdoor applications. PanJit optimizes and customizes the optical characteristics of the Touch Screen by enhancing the polarized light transmission; color saturation and sunlight contrast, also reducing the natural light reflection. PanJit offers the broadest range of customization solutions to meet your next project specifications.

No matter if you require a standard Touch Screen or Custom, the Panjit and Avnet teams will meet your requirements with On-Time-Deliveries and Superior Customer Service. Our goal is to assist you in making an informed decision about the best touch screen solution for your application.

Find out more in Panjit’s new Touch Screen Brochure:

Posted by Steve Gereb, Feb 13, 2009

Overview

Many applications of displays involve installation in environments having a high humidity level. Of specific importance in this regard is the marine environment. In this application, an LCD, OLED or Plasma monitor, no matter how well sealed, will eventually “inhale” moisture within the enclosure. Once inside the enclosure, it is extremely difficult to remove the water vapor. As a result, the protective clear window installed in front of the display will develop a fogged appearance when it becomes chilled. Ways in which it can become chilled include direct impingement of air conditioned air onto the face of the display or spray impacting the outside. The fog which develops inside of the window is frequently difficult to remove without heating the glass or opening the display. General Digital™ Optical Bonding Laboratories™ has developed two distinctly different ways to prevent this from being an issue.

The first technique is to optically bond the window to the flat panel display. This eliminates the air space between the display and the window, thereby eliminating moisture entirely from the space, and hence, the problem of condensation.

The second technique it to provide a hermetically sealed window which includes a desiccating gasket as a part of the seal. This window is, in effect, a custom thermo-pane window tailored to the display. The following paragraphs will describe in more detail the trade-offs in this design.

Basic Design

Two pieces of glass are held in close proximity to one another and are sealed by a specially designed gasket. This gasket, in addition to providing a spacer for the protective window also excludes interchange with the ambient air. The adhesive used is designed to provide a moisture absorbing (desiccating) ability. Thus, as time goes on, the moisture content between the two pieces of glass will actually decrease. In addition, the dead air space between the two glass surfaces forms a thermal barrier, preventing the inner glass from becoming chilled when the outer surface is chilled. The overall effect is to eliminate the fogging which otherwise could occur.

Both our experience and the information from manufacturers of similar products show that the moisture content of a desiccant sealed optical window remains below 10% RH for years. Consequently, in the absence of mechanical damage to the protective window, the display will never be subject to condensation fogging.

Comparing the mechanical design of the sealed window to other designs, we find that this approach adds depth to the display. The thinnest design we would recommend is 7/16″. This is composed of two pieces of 3 mm glass, spaced apart by the thinnest desiccant gasket available (3/16″). In addition, there will need to be a small air gap between the inner layer of the window and the LCD, OLED or Plasma display. Compared with a 3 mm protective window, we need an additional 5/16″ inch in the display depth. Optical bonding does not add this extra space.

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