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
Applications:
* 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
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1.Electrical Properties | Membrane Switch |
Electrical Level: | 35V(DC), 100mA,1W |
Contact Resistance: | 10Ω~500 Ω |
Insulation Resistance: | 100MΩ/100V |
Dielectrics Voltage-resistance: | 250VRms(50~60Hz 1min) |
Chattering Time: | ≤ 5ms |
Life Time: | Flat type ≥ 5,000,000; Tactile type ≥ 1,000,000 |
Tail Folding: | R>1,180 |
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2.Mechanical Properties |
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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 |
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3.Environmental and Storage Conditions |
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Operation Temperature: | -40°C ~ +80°C |
Storage Temperature: | -40°C ~ +80°C |
Humidity: | 40°C, 90%~95%, 240 hours
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FAQ:
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...
