The optical film, light up through the point to plane | Lighting | Light Guide | Film | Electro Luminescent Lamp Manufacturer | Cochief

Customized light guide film | Cochief provides total solution of light source solution to create more innovative products with customers.

Flexible Touch Sensor

Flexible Touch Sensor

Check out our new product group, the Flexible Touch Switch and see how you can use our technology for your type of product!

EL on Fabric

EL on Fabric

Now you can print EL fabric! Enhance your products with our electroluminescent panels.


Light Guide Film | Capacitive Touch Switch Modules & Displays Manufacturer | Cochief

Located in Taiwan since 1998, Cochief Industrial Co., Ltd. has been a backlight applications and touch switch solutions manufacturer. Their main products include, Light Guide Film, cuttable EL panel, light guide film, EL wire, light display electroluminescent, EL lamps, intelligent lighting control module, capacitive touch switch module, capacitive touch sensor, flexible touch film, tactile switch and touch module, which are mainly focusing on designing and developing electro-luminescent products.

COCHIEF was established in February, 1998. We mainly produce electro-luminescent that known as “EL”. “KEEPING PROGRESS & BEST QUALITY” as the key spiritual principle strongly persisting in Cochief. Keep improving the manufacturing capability as well as pursuing innovative ability in order to match the multi-developing markets. Also being eco-friendly matched as ROHS compliance products. with more than 20 years manufacturing experience in producing EL Panel, Light Guide Film and Intelligent Touch Switches Modules for customers in global market from Taiwan.

Cochief has been offering customers backlight applications and touch switch solutions, both with advanced technology and 25 years of manufacturing experience, Cochief ensures each customer's demands are met.

Light Guide Film

Customized light guide film(LGF)

The optical film, light up through the point to plane

Customized light guide film
Customized light guide film

Light guide film (LGF) The thickness is only 0.1mm ~ 0.5mm, and can be designed according to the customer's organization. Through the surface microstructure, the side of the LED light is refracted to achieve illumination with the effect of uniform light.

Cochief’s LGF solution not only can provide complete microstructure layout planning, suggestions and arrangements of LEDs, but also provide complete light guide film assembly.


Our ultra-thin and flexible Light Guide Film is the perfect backlighting solution for any device.

Catalog download
  • Light Guide Film Catalogue
    Light Guide Film Catalogue

    Light Guide Film Catalogue DownloadLight Guide Film are designed for effective use of LED edge light sources. Light from the LED sources is internally reflected down the length of LGF to the various viewing areas. This new technology patterning allows light to be efficiently and uniformly directed where light is desired in a very thin profile film.Applications: Keypad, Keyboard, Sign, Logo, Backlight for LCD. Advertising displays, Kiosks, Bulletin boards, Showrooms, Automotive, Exhibition /Trade shows, Traffic signboards, Public transportation stops, Accessories … etc.

Practical application

  • Two colors,thin,efficient, light guide film(Photo 1)


  • Size:10mm*10mm~120mm×120mm
  • Thickness:0.1-0.5mm
  • Brightness:10-50 nits /31.41-157.08 Lux
  • Light Uniformity:60%
  • RoHs Compliant

Feature of product

  • Very thin
  • Low power consumption
  • Elastic, flexible
  • Competitive price
  • Brighter light with fewer LEDs
  • Customized Design
  • Homogeneous brightness
  • Long life
  • No EMI

Application field

  • Backlight keyboard
  • Product logo
  • LOGO backlight
  • Badge
  • Man-machine interface
  • Indicator lighting
  • LCD backlight
  • Aviation Industry Equipment Lighting
  • Electrical appliances with LED

Cochief's Advantage

Press Release