What is Optical Bonding?

Optical bonding is a technology that injects special glue in the display glass or touch screen and TFT liquid crystal (TFT) panel and coated with a layer of resin (OCR) or film (OCA), bonding into a solid laminate without gaps or bubbles. When selecting screens for any project, you should evaluate the environmental and operational conditions that screens will have to endure. Industrial-grade screen and panel PCs are rugged with all types of features and can withstand any type of application. One property that can be considered is optical bonding.

Optical bonding is widely used in the medical, military, transportation and retail sectors where higher performance displays are required due to harsh environments.  Optical bonding is suitable for industries that need to use robust displays in high reliability environments or need to use displays in high ambient light conditions.  The optical bonding process is particularly suitable and more efficient for equipment that operates outdoors or in bright light.

Optical Bonding Process

Our optical bonding technology effectively improves optical performance, impact resistance, and thermal management.

1.TP/LCM Inspection

1. LCM Inspection
a. Check for any foreign objects or scratches on the screen.
b. Ensure the metal frame is even and undamaged.
c. Illuminate the screen to check for dead pixels, dark spots, or color abnormalities.

2. TP Inspection
a. Inspect for surface scratches and check if the flex cable has any folds or creases.
b. Verify that touch functionality operates correctly.

2.LCM Sealing Dam

Apply UV glue into the gaps of the LCD metal frame, and cure it with a UV lamp to prevent the potting compound from entering the LCD backlight during subsequent potting.

3.Remove Excess Adhesive

Apply a ring of 3M tape or a ring of black adhesive on the LCD iron frame to bond the LCD and touch screen together, forming a box and leaving a glue filling port.

4.Inject Wacker Sealant

Ensure no air bubbles are formed during the process.

5.Accelerate Curing via Baking

Bake at 50°C for 1 hour to accelerate the adhesive curing.

6.Clean Residual Adhesive

Use alcohol to remove any excess adhesive from the screen. Simultaneously, check for air bubbles or foreign particles.

7.Seal Edges with Black Adhesive

Apply additional black adhesive along the frame to enhance waterproofing and reinforce the injected sealant layer.

8.QC Testing

Check for foreign objects inside the screen and surface scratches. Inspect for dead pixels or dark spots under different background colors.

Comparison of Strong Light Irradiation

Between LOCA Full Lamination & Traditional Air Gap Bonding

Optical Bonding-1_jpg
  • Minimal impact on display performance under strong light with low light reflectivity.
  • Eliminates dust, condensation, and other impurities within the interlayer.
  • Enhances overall structural strength with excellent shock and impact resistance.
  • No bubbles, wrinkles, or other defects in the bonding layer; yellowing-resistant with a shrinkage rate of <1.0%.
  • Liquid filling ensures seamless bonding regardless of height differences between the metal frame and LCD screen.
  • Controlled adhesive overflow during FLOCA filling prevents waste.
  • Simple and user-friendly bonding process.
  • Compatible with 5-inch to 86-inch displays, including flat and curved screens.
  • No external pressure required during FLOCA filling, preventing damage to LCD modules.
Optical Bonding-2_jpg

Optical Bonding VS Non-Optical Bonding

At least increas 10% Brightness of panel

Sunlight readability (Text could be seen within 1m away from sreen)

The image & content will not be blur even the Viewing Angle keeps changed

AG coating reduces reflections. More Clarity More Eye care

More accuracy and More faster for drawing and Writing No delay, No gap between finger and drawing

Be more able to withstand the external Impact and Scratched

Our Optical Bonding Service

  • Supply TP/CG + LCM Modoule/OC Panel + Optical Bonding Service
  • Supply Optical Bonding Service (Custom Provide TP/CG + LCD Modoule/OC Panel)
Organic Sillicone Glue (Germany Wacker Glue)
  • Organic Sillicone Glue (Germany Wacker Glue)
  • The Glue will not change to yellow even working under high temperature
  • Be able to prevent bubble created inside between TP and LCD.
  • Be able to prevent yellow screen.

Ready to Get Started?

Contact us today to discuss your touch screen requirements and how we can help you achieve your business goals.

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Production Line

We operate modern production facilities with advanced manufacturing equipment, ensuring high quality and stability throughout the entire process from R&D to production.