The integration of touchscreen with LCD (Liquid Crystal Display) panels is a cornerstone of modern device manufacturing, used in everything from smartphones to interactive kiosks. So this article explains the process known as “touchscreen bonding,” the techniques used, and the benefits of each method.
Touchscreen bonding refers to the process of attaching a touchscreen overlay to an LCD panel. The main goal is to create a single integrated display unit that enhances the display’s clarity, responsiveness, and durability. There are primarily two bonding techniques used in the industry: optical bonding and adhesive bonding.
Optical bonding involves using a liquid adhesive to bond the touchscreen directly to the LCD. This method eliminates the air gap between the touchscreen and the display, which significantly reduces reflections and improves visibility under various lighting
conditions. The adhesive used is typically a clear silicone or resin, which hardens to form a solid bond without affecting the touch sensitivity or display clarity.
Surface Preparation: Both the LCD and touchscreen surfaces are thoroughly cleaned to remove any dust, oils, or contaminants.
Application of Adhesive: A layer of liquid optical clear adhesive (LOCA) is applied either to the touchscreen or directly on the LCD.
Alignment and Placement: you need to carefully align touchscreen over the LCD, ensuring precise placement.
Curing: The assembly is then exposed to UV light or heat to cure the adhesive, forming a robust bond.
Improved visibility due to reduced reflections and glare.
Enhanced durability as the bonding helps protect the LCD from dust and moisture.
Improved touch sensitivity and display sharpness.
Adhesive bonding, also known as air-gap bonding, uses double-sided tape or less viscous adhesives to attach the touchscreen to the LCD. This method is simpler and more cost-effective than optical bonding but leaves a small air gap between the two components.
Surface Preparation: Similar to optical bonding, both surfaces are cleaned to ensure optimal adhesion.
Applying Adhesive: Adhesive tapes or a thin layer of adhesive is applied around the perimeter of the LCD.
Alignment and Placement: The touchscreen is aligned and placed onto the LCD, pressing down to secure the bond.
Curing: Depending on the adhesive type, there may be require some curing or setting time.
Lower cost compared to optical bonding.
Easier to repair or replace the touchscreen or LCD if needed.
Suitable for larger displays where complete optical bonding may be impractical.
The choice between optical and adhesive bonding depends on several factors:
End-Use Environment: You can use devices outdoors or in bright lighting conditions benefit more from optical bonding.
Budget Constraints: If cost is a major concern, adhesive bonding provides a viable alternative.
Device Specifications: High-end devices typically use optical bonding for superior performance and aesthetics.
DINGTOUCH is a company specializing in the R&D and production of touch screen technology, headquartered in Shenzhen, China. However, as a professional touch screen supplier, DINGTOUCH commit to providing high-quality, stable and reliable touch screen products to meet the diverse needs of customers. Also We continue to carry out technological innovation and product optimization to ensure that its touch screen products have good sensitivity, accuracy and durability.
In addition to the products themselves, we also focus on cooperation and communication with customers. However, commit to providing customize solutions and excellent after-sales services. Through continuous efforts to improve product quality and customer satisfaction. So we have established a good reputation in the touch screen industry and won widespread market recognition.
PCAP maximum size 65”
Multi-touch
Optical bonding service/air bonding
LCD interface: HDMI/RGB/MIPI/LVDS/EDP, etc.
PCAP interface: IIC/USB interface
Also CTP can customize the cover glass surface treatment process AG (anti-glare), AR (anti-reflection), AF (anti-fingerprint), waterproof, and glove touch
Supports 0.55 mm-12 mm coverslip touch.
Support operating temperature: -40℃-90℃.
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our other one website: www.szdingtouch.com
