JRPanel Membrane Switch / keypad Introduce

Membrane Switch

A new type of electronic keypad operating system that integrates key functions, indicator components, and front panels.

The membrane switch is composed of six layers: Graphic overlay, upper-adhesive, the upper circuit, the isolation spacer, the lower circuit and the back adhesive. The contact of the upper circuit is downward, and it is in contact with the point of the lower circuit. The circuit contact bounces back after releasing, then the circuit is disconnected and the loop triggers a signal.

The Membrane switch has strict structure, beautiful appearance and good sealing. It has the characteristics of moisture resistance and long service life. It has been widely used in electronic communication, electronic measuring instruments, industrial control, medical equipment, automotive industry, smart toys, household appliances and other more fields.

Working Principle of Membrane Switch

The basic working principle of the membrane switch is as follows: when the keys is not pressed, the membrane switch is in the normal open state, and its upper and lower contacts are disconnected, and the isolation layer isolates the upper and lower lines; when the keys is pressed, the upper contact point of the circuits is deformed downwards, and it merges with the lower circuit to make the circuit conductive.

The connected circuit signals of the external connection instrument (substrate) to achieve its corresponding function; when the finger is released, the upper circuit that touches the lower point will be bounced back, then the circuit is disconnected, and the loop triggers a signal.

Membrane Switch Application Fields

Household Appliances
Office Equipment
Toys & Remote Control
Mechanical & Industrial
Control
Instrumentation

Membrane Switch Technical Parameters

Electrical Properties

Operating Voltage

＜25VDC

Working current

≤50mA

Contact resistance

20~150Ω

Insulation resistance

≥100MΩ （100VDC）

Base Material Voltage

1.5kDVC

Rebound time

≤6ms

Insulation ink
withstand voltage

100VDC

Mechanical Properties

Reliability Life

＞100 million times

Key Displacement

0.1~0.2mm (Non-Tactile)
0.3~0.8mm (Embossed key)

Force

180~350g

Silver Trace Width

≥0.3mmmin. spacing 0.5mm
With green Insulating oil

Contact Pitch

2.54mm (common)
1.0mm (common)
1.27mm

Environment Properties

Operating Temperature

-20℃ ~ +90℃

Storage Temperature

-30℃ ~ +90℃ Humidity 95%±5%

Atmospheric Pressure

86~106KPa

Printing Index

Printing Size Deviation

±0.20mm
Unclear edge deviation ±0.2mm

Hallow Deviation

± 0.1mm/100mm

Color difference

10%According to the Pantone card,
with 10%

The Comparison of PVC/PC/ PET

PVC - Not supply - Not supply

Non-degradable (not environmentally)

Glossy / Transparent to opaque/
Good light transmittance

-10~60℃

Thickness：0.175~0.5mm

PC（Polycarbonate）

Degradable (Environmentally)

Glossy / Transparent to opaque /
Good light transmittance

-30~110℃

Thickness：0.175~1.0mm

PET（Polyester）

Degradable (Environmentally)

Glossy / Transparent/
Good light transmittance

-20~120℃

Thickness：0.125~0.2mm