STYLUS Touch Performance Testing

OptoFidelity STYLUS is based on the accurate OptoStandard robotic platform which fulfills the precision required for stylus testing. The stylus location, angle and applied force have an impact on how the application shows e.g., a line drawn by the user. OptoFidelity STYLUS provides the user with control over the stylus tilt and azimuth angles as well as force applied to the DUT (device under test). The default system setup includes motion control that supports synchronized motions enabling a variety of stylus gestures.

OptoFidelity STYLUS is delivered with a factory-calibrated camera system and motion control accuracy. The motion control accuracy of the delivered test system supports +/-25 μm accuracy, which has been verified with the external 6DOF measurement system.

System Setup

Accurate OptoStandard (XYZ) robotic platform
Stylus test actuator supporting controlled azimuth angle, tilt angle and applied force
Universal stylus holder for mounting the tested stylus
Integrated stylus position calibration tool and force calibration tool
Control box
Measurement PC with peripherals (display, keyboard, mouse)
Touch and Test (TnT) Software Suite
Android test application to test and measure a product

Benefits

High accuracy tool for measuring touch UI quality and usability

Comprehensive test case coverage

Efficient system software guaranteeing reliable test results data

Comparable results from the chipset level to the final product level

Supports reliability testing with 24/7 test automation

Supports automated touch testing for continuous integration

Test Feautures

OptoFidelity STYLUS touch gestures include tap, drag, swipe and circle with user controlled tilt angle, azimuth angle and contact force.

Touch Accuracy, i.e. the accuracy of the tap gesture position reported by the touch panel compared to the programmed position of the tap.

Touch Jitter, i.e. variation in detected touch screen coordinates while finger is motionless or drawing a straight line.

Touch Linearity, i.e. how accurate the touch panel coordinates are compared to the actual, programmed position of the linear swipe gesture.

Touch Reporting rate, i.e. the frequency of reporting in the touch panel

Touch Resolution, i.e. the smallest increment of position change the touch panel is reporting

Touch Latency, i.e. the level of delay between the tap gesture and receiving the related touch event (touch panel level test).

Touch Sensitivity, i.e. the level of signal received from the touch sensor (touch panel level test).

OptoFidelity STYLUS