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LGF backlight membrane switch
4 Wire Resistive Touch Screen
Product Feature

LGF backlight membrane switch is a backlight effect with unique appearance design . A kind of new material namely light film is used on the basis of tranditional membrane switch, with the characteristics, when the LED light flash out on the light film and after diffusion ,It can have the effect of t backlight. Compared with the traditional EL backlight, production process is relatively simple and much easier to drive for LGF backlight.


Polyester is used for both circuit layers and overlay layers. High temp and corrosion resistant, the flexibility and mechanism are good as well as  high reliability. It is mostly suitable used in  products where the application environment are atrocious or products are emboss required.

Polycarbonate is usually used  for overlays. It has more competitive price than PET so mostly used in products  that styles improved frequently, such as  microwave oven and toys , etc.
Standard Specification
Maximum Circuit Rating
35V( DC),100mA 1W
Contact Resistance
10Ω ~ 500Ω (depending on trace length & material used).
Insulation Resistance
≥100M Ω at 100V
Dielectric Withstand
250 V Rms (50~60 Hz 1 min.)
Contact Bounce
Life Expectancy
Flat type ≥5 million

Tactile type ≥1 million

Operating Force
Flat type = 57 to 284 g (2 to 10 oz)

Tactile type = 170 to 397 g (6 to 14 oz)

Switch Stroke
Flat type = 0.1 to 0.5mm

Tactile type = 0.6 to 1.5mm

Operation Temperature
Flat/Metal dome: -20 ℃ to +80 ℃

Poly dome: -20 ℃ to +60 ℃

Storage Temperature
Flat/Metal dome: -40 ℃ to +80 ℃

Poly dome: -40 ℃ to +60 ℃

40 ℃ , 90%  for 240 hours
20 G's0 max
(10-200 Hz、MIL-STD-202、M204、Condition B)

Household appliance, medical instruments, measuring instruments.

5 Wire Resistive Touch Screen
5 Wire Resistive Touch Screen
5 Wire Resistive Touch Screen

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