Optical bonded displays offer optical characteristics and mechanical robustness superior to any other solution.

Optically bonded “cover glass” can be any number of materials such as glass, polycarbonate, acrylic, touch screens, or other optically clear overlay material placed in front of the LCD. Integrated ITO Heaters and EMI/RFI shielding can be included in the bonding process if needed, providing a product that is complaint to the most extreme of requirements.

Benefits of Optical Bonding include:

Improved Optics and Glare Reduction – Optical bonding reduces or eliminates reflection from internal and external light sources. When combined with Anti-Reflection front surface it is possible to dramatically reduce glare and increase light transmission from the assembly yielding a most satisfying and accurate viewing experience.

Protection of the display – Displays typically have a polarizer that is a soft plastic material as the front surface. The front surface is easily scratched, even from routine cleaning. With optical bonding a protective “cover glass” is placed on the display. The optically bonded display can be further built into a system which is weatherproof, in fact we have had products which were bonded for use by divers under water.

Safety – An optically bonded display can help contain materials in the event of breakage (an impact directly to the display or crash in a vehicle). This is well suited for transportation application and is also used in zero gravity spacecraft. A display that is easily read is also a benefit where the driver/operator heads to look away momentarily to read a display before focusing back on driving or the task at hand.

Reduced Power – In a high ambient brightness environment an optically bonded display will allow you to turn down the installed backlight system. In fact in a sunlit environment going from 12% to 1.5% reflection will have the same effect on contrast ratio as going from 500 nits to 3500 nits. The results not only in a savings in power consumption, but also less heat is generated which must be removed from the assembly.

Ergonomics – A display with reduced glare and sharp clear image reduces eyestrain and is essential for those whom make their living from behind the LCD. The American Optometric Association lists glare as a contributor to Computer Vision Syndrome (CVS) and reducing glare is effective in reducing the effects of CVS.

Dust and Moisture – By eliminating the gap between the LCD and the cover glass this area can no longer be a place where dust and moisture collect.

Vision and Mechanical Shock – It has been demonstrated that an optically bonded display is superior at resisting the effects of vibration and mechanical shock.

Markets / Applications Using Optical Bonding

• Military
• Avionics
• In-Flight Entertainment
• Medical
• Digital Signage
• Marine
• Industrial
• Control Room
• Transportation/Automotive
• Consumer

After optimizing the optics of the front of the display by reduing reflections from all materials between the display image and the viewer through AR Films, Optical Lamination and Optical Bonding the next place to focus for improvement is the backlight of the LCD.

Passive Backlight Enhancements

Many LCD displays can benefit from passive enhancements utilizing more efficient light diffusing films in the optical path and through focusing the existing light emitted from the display to the designed eye position. Passive Enhancements alone can almost double the light output of many displays.

Two of our main tools in passive enhancements is 3M Brightness Enhancement Films (BEF) and Dual Brightness Enhancement Films (DEEF). The BEF materials works by focusing light to the viewer, and the DEEF film is a reflective polarizer which actually recycles the light which would otherwise be attenuated by the rear polarizer of the display.

LED Backlights and Active Enhancements

Interactive Display Solutions Inc. can design and provide almost any commercially available display in an LED version. LED backlights provide more brightness with less power, are operational over a wide temperature range with no warm up time (instant on in all conditions), and being solid state are more robust in difficult environments.

Benefits of LED Backlights:

• More Brightness with less power consumption and less heat to remove from the system.
• Wide Temperature Operations – Instant On
• Low Voltage operation for minimal impact on EMI/RFI
• More robust when subject to mechanical shock and vibration
• NVIS compatible LED for dual mode operation
• Can be used in direct backlighting application to increase dynamic contrast
• Long life Operation and Redundancy
• No Mercury and ROHS Compliant

WPG Americas Displays is an innovative company that provides flat panel display enhancements. Our enhancements are applicable to a broad range of FPD technologies including liquid crystal (LCD), Plasma, Vacuum Flourescents (VFD) and OLED.

Our goal is to improve the looks and durability of your LCD or FPD in all the environments it will operate. Our enhancements dramatically reduce front surface and internal reflections while making the display brighter and increasing viewability in all conditions.

Antiglare – Antireflection – Contrast Enhancement

The solutions that WPGA Displays provides include:

• Optical Lamination of Flexible Substrates
• Optical Bonding in Rigid Substrates
• Passive Backlight Enhancements
• Active Backlight Enhancements
• Contact Assembly and Kitting
• Touch Panel Attachment
• Test, Measurement and Display Screening
• Humidity Protection
• Polarizer Replacement
• Hydrophobic and Oleophobic Surface Treatments
• Specialty Think Film Coating Design
• Repair and Refurbishing of LCD Displays

All Value-Added work at WPGA Displays is preformed at ESD safe workstations and optical path work is always preformed in either a Class 1000 Clean Room or Class 100 Benches.

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