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LGF Light Emitting Film Backlight Membrane Switch Waterproof PET 0.188

Basic Information
Place of Origin: Shenzhen, China
Brand Name: Lunfeng
Certification: ISO9001:2015
Model Number: BMS-026
Minimum Order Quantity: 1 piece
Price: Negotiable
Packaging Details: First put into a polybag, then paked into a carton. According to clients' special requirements.
Delivery Time: 7-25 working days, To be negotiated
Payment Terms: T/T, Western Union
Supply Ability: 500000 Piece/Pieces per Month
Product Name: Back Light Membrane Switch With LGF Light Emitting Film Used On: Various Automtic Machine Control Keypad
Color: Pantone Or RAL Color, White Black Key Material: PET 0.188 PET
Rear Adhesive: 3M9090 300LSE Feature: Metal Domes, Leds
Cable: Flexible,track Pitch Item Name: Backlit Membrane Switch
Circuit: Printing Silver Ink On PET Material
High Light:

Emitting Film Backlight Membrane Switch


LGF Light Backlight Membrane Switch


PET 0.188 waterproof membrane switch

Back Light Membrane Switch with LGF Light Emitting Film


LGF Membrane Switch: The LGF Technology


LGF stands for Light Guide Film that is responsible for directing light generated via right-angle LEDs or side-firing across areas where you need the backlit. It is basically a thin film backlighting technology that industries across the world have been using for backlit purposes.

The great thing about LGF technology is that it provides consistent backlighting regardless of the area shape. It also offers uniform lighting across multiple areas within the switch. It is possible to use multiple LG films within a certain application in order to offer discrete backlighting to different graphic features.


In order to achieve unique lighting effects, you can use different colored LEDs. On the overlay, you can associate different lighting colors with different printed graphics.


Working of Light Guide Film Technology


The thickness of the Light Guide Film ranges from 0.005 to 0.020”. The layer has microdots incorporated in it. These dots are pressed onto areas that are to brighten up once you supply power. This particular area is referred to as the imaged area.


In order to place the side view LEDs in the right location, manufacturers tend to perform cut-outs in the film. The side view LED generates light rays. These rays travel via the film and hit the microdots. When they make contact with microdots, they are refracted upwards towards the overlay surface. Thus, ensures uniformity in the backlighting effect. Something every LGF membrane switch user wants.


Membrane switch with LGF :

1.LGF is a thinner construction, without limited to devices thickness.
2.LGF has a limited impact on the tactile feel of buttons.
3.LGF can provide even backlight across larger and small areas.
4.Reliability and long lifetime, Low-Cost
Efficient power consumption and operating on lower voltage
5.Colors: White, Blue, Red, Green is a common choice.


Our Advantage:
We Focus in membrane switch and related items.
Strong R&D capability
Stable in quality
Competitive price
Short Lead time for samples and Mass production
Whole solution design available
* home appliances and device
* Security Protection systems with Cipher Code
* Various industry control keypad panel
* consumer electronics and 3C item
* Thrapy medical system and device
Various automtic machine control keypad



Items Silver Printed Circuit Copper Etched FPC Circuit
Material PET (Polyester) Copper
Conductor Printed silver Copper
Contact Fingers Silver and Carbon Gold plated
Contact Buttons Pads Silver Gold plated
Life & Reliability normal good
Stability normal good
Resistance low Very low
Cost low high
Lead Time 2-3 days 7-10 days
Pitch 0.5mm (not suggested), 1.0mm, 1.27mm, 2.54mm 0.5mm, 1.0mm, 1.27mm, 2.54mm




1.Electrical Properties

Membrane Switch

Electrical Level:

35V(DC), 100mA,1W

Contact Resistance:

10Ω~500 Ω

Insulation Resistance:


Dielectrics Voltage-resistance:

250VRms(50~60Hz 1min)

Chattering Time:

≤ 5ms

Life Time:

Flat type ≥ 5,000,000; Tactile type ≥ 1,000,000

Tail Folding:




2.Mechanical Properties


Operating Force:

Flat type 57~284g (2~10oz); Tactile type 170~397g(6~14oz)

Switch Stroke:

Flat type 0.1~0.5mm; Tactile type 0.6~1.5mm



3.Environmental and Storage Conditions


Operation Temperature:

-40°C ~ +80°C

Storage Temperature:

-40°C ~ +80°C


40°C, 90%~95%, 240 hours





Q1: Are you a factory or trade company?
A :  Lunfeng is membrane switch/ graphic overlay manufacturer/factory. We pecialize in memrbane switch for 26 years.

Q2 : Is my switch file safe if I send it to you for manufacturing?
A : We respect customer's design authority and will never manufacture membrane switch/ graphic overlay   for someone else without
your permission. NDA is acceptable.

Q3 : Can you copy membrane switch/ graphic overlay samples without file?
A : Yes, we can clone membrane switch/ graphic overlay according to your samples.

Q4 : What payment do you accept ?
A : TT/ Western Union.

Q5 : What's your shipping way ?
A : 1. We have our own forwarder to ship goods by DHL, UPS, FEDEX, TNT, EMS.
      2. If you have your own forwarder, we can cooperate with them.

Q6 :  How about the MOQ?
A : 1 pcs, but normally 5 pcs samples for memrbane switch,  10 pcs for membrane overlay.
Q7 : What's your main market?
A : Europe, USA, Brazil, Russia, Turkey, Iran, Austrialia, Singapore...


LGF Light Emitting Film Backlight Membrane Switch Waterproof PET 0.188 0

LGF Light Emitting Film Backlight Membrane Switch Waterproof PET 0.188 1



Contact Details
Sales Manager

Phone Number : +8613662697476

WhatsApp : +8613662697476