Scroll Ring Interface

Overview

The SimScroll interface is a circular switch array that utilizes our advanced SimTouch™ switch technology. It is perfect for products requiring effective navigation or large menu lists. Typical applications include universal remote control, MP3 players and A/V media system controls.

Through our decades of experience and expertise in switch tecnology, we understood that light actuation force switches were quickly becoming the industry standard for high-end products. SimScroll provides the unique ability to add elegance and effectiveness to your interface designs. With SimScroll, you can cost-effectively offer your customers the high-end experience of capacitive touch.

SimScroll uses a flexible overlay laminated to the switch circuit. Low actuation force and extremely short travel distances creates the experience of a capacitive touch switch. The SimScroll interface can be constructed using a variety of overlay materials. This can provide a smooth glass-like finish or brushed metallic for a stainless steel look.

Typical Construction

• 16 SimScroll interface elements in a 1.5" (38mm) circular array are standard. The number of switch elements and diameter can be customized for specific design requirements
• Actuation force: 1.5oz to 2.5oz (43gr to 71gr)
• 0.010" (.25mm) polycarbonate overlay (hardcoated, textured or brushed metallic finishes)
• 0.007" (0.18mm) polyester overlay (hardcoated and UV resistant finishes)
• Activation pads can be screened directly on overlay or on an additional polyester layer
• Selectively printed screenable adhesive or die cut spacer
• Conductive circuitry/force sensing layer
• Polyester circuit
• Pressure sensitive mounting adhesive
• Digital interface reference design available

UL Recognized Component

• File # E156070

Specifications

1. Force applied on top of the polycarbonate is transmitted to the force-sensing resistor material.
2. This causes a drop in resistance, which is detected by the electronics connected to the membrane circuitry.
3. The electronics then perform a switching action.
4. Switch is not affected by temperature or pressure changes.

Environmental Testing

Subjected to temperature and humidity cycle of:

1. Transition from ambient 1.0 Hour
2. Steady state @ 5 C, 30% RH +/- 20% 1.0 Hour
3. Transition to 85 C, 50% RH 1.0 Hour
4. Steady state @ 85 C, 50% RH 1.0 Hour
5. Transition from 85 C to 45 C, 90-98% RH 1.0 Hour
6. Steady state @ 45, 90-98% RH 1.0 Hour
7. Transition from 85 C to 45 C, 90-98% RH 1.0 Hour
8. Transition from 25 C to 105 C, 30% RH +/- 20% 1.0 Hour
9. Steady state @ 105 C, 30% RH +/- 20% 1.0
10. Transition from 105 C to 25 C, 20%RH 2.0 Hours
11. Steady state @ 25 C, 20%RH 1.0 Hour

Subjected to 30 cycles and monitored at various points in the test cycle. No anomalies found in the switch. Additional testing is ongoing

Operating Temperatures

Designed for -10 C to + 105 C, test results pending

Resistance

Open > 1 Megohm   Closed < 1 Kilohm