Capacitive Touch Display

Why Use Fiber Optics for Capacitive Touch Backlighting

Touch screen displays are becoming more popular in the market with touchscreen phones, computers, and other display devices. Capacitive touch displays are a type of touch screen display that work with anything that has an electrical charge like your finger tip. As with other displays, lighting is important to be able to see the display.


Lumitex designs and manufactures custom backlighting solutions for capacitive touch displays across many different types of applications including:

  • Consumer/Commercial Appliances
  • Consumer Electronics
  • Control Panels
  • Industrial Displays

Why our Technology is Ideal for Capacitive Touch

When backlighting a capacitive touch display, light is placed between the sensor and the cover layer of the screen interrupting the capacitive field. It is essential to choose a backlight that creates minimal capacitive field interruption while still being able to enhance the overall efficiency and design of the application. Our proprietary technologies offer many unique benefits to Capacitive Touch Displays:


Low-Profile - As thin as .2mm to reduce space needed and interruption to the capacitive field


Efficient - Bright, efficient and low power. We work with our customers to optimize the overall design to be power efficient and meet power requirements


Flexibility of Design

  • Adaptable to a variety of sizes, shapes and colors in a very thin format
  • Flexible materials can conform to various contours
  • Scratch Resistant Integration Application Examples

Application Examples

automotive lighting example

High End Appliances

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How Our Features Work

We offer many enhancements to customize our lighting to meet your product specifications. These include:

Selectively masking areas
Adding Integrated Printed reflector
Adding a diffuser layer and/or Brightness Enhancing Film (BEF)
Specifying Components and Power Requirements

In addition, our sales and engineering teams will support you from prototyping through production.




Interested in a Capacitive Touch Display Solution?

Get in touch with an electronics backlighting expert at Lumitex

Capacitive Touch Sense Interface


A leading manufacturer of capacitive touch and membrane switch assemblies, contacted Lumitex to develop a custom backlight for a high end appliance, capacitive touch application. The Clad Flat Fiber light guide was selected due to it’s very thin profile, brightness, uniformity advantages to efficiently transmit enough light through the opaque glass. The Clad Flat Fiber was also designed to independently light (5) icons without any light interference from icon to icon, while using less LEDs compared to other light guide films technologies.

Key Reasons our PCF4 – Clad Flat Fiber™ Backlighting Technology was selected

  1. LGF Thin profile (.45mm)
  2. Enhanced uniformity and light outputs levels
  3. Icons independently lit
  4. LEDs located in strategic positions
  5. Life
  6. Lumitex Service – Engineering and design flexibility, quality, and customer service

Decorative Door Sill


When our customer needed to backlight thier decorative doorsill applique, they teamed up Lumitex for a solution.  Our patented Uni-Glo® technology was selected due it’s ultra thin, panel constuction and the ability to withstand a variety of enviromental conditions without deterioration. 

Due to specific automotive requirements, the Uni-Glo® technology was also selected due to it’s capability to remote the LED light source away from the doorsill pocket well.  The Uni-Glo® technology is also heat and EMI-free and provides superior brightness, uniformity, and longer life compared to other types of lighting technologies.  

Key Reasons our Woven and UniGlo Fiber Optic Panels Technology was selected

  1. Thin profile
  2. Remote Light Sourcing
  3. Light intensity and uniformity
  4. Design flexibility and durability