Touchscreen Panning Latency Test Apparatus
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Solution Overview
Problem
Conventional techniques for testing touchscreen devices are often inaccurate, leading to inadequate assessment of their suitability for intended use, particularly in measuring panning latency and responsiveness.
Innovation Solution
A test apparatus is developed, equipped with motors and sensors to measure panning latency by moving a contact along a circular path at constant angular velocity, utilizing photo interrupters or lasers to detect movement and calculate latency, enabling precise evaluation of touchscreen devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional testing techniques are used for touchscreen devices, then the testing process is simple, but the measurement accuracy of panning latency is insufficient
Solution Approach 1:
The patent replaces manual mechanical testing with an automated motor-driven contact system. The motor moves the contact along a circular path at controlled velocities, eliminating human reaction time variability and enabling precise, repeatable latency measurements through automated control and data collection.
Solution Approach 2:
The patent introduces photo interrupters as intermediary sensors to detect the contact's position and movement. These optical sensors provide precise non-contact detection of the test contact's location, enabling accurate timing measurements without physical interference with the touchscreen surface.
2Reliability
If manual testing methods are used, then the device complexity is low, but the responsiveness assessment is inadequate
Solution Approach 1:
The patent implements continuous movement of the contact around the circular path at constant angular velocity, rather than discrete point-by-point testing. This continuous action enables comprehensive assessment of responsiveness across the entire touchscreen surface, capturing latency variations throughout the display area in a single uninterrupted measurement sequence.
Solution Approach 2:
The patent incorporates real-time data collection and processing that provides feedback on latency measurements. The system continuously monitors the contact's position via photo interrupters, records timing data, and processes results to generate actionable insights about touchscreen responsiveness, enabling iterative optimization of device performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides accurate measurement of panning latency, enhancing the assessment of touchscreen devices' responsiveness and user experience by quantifying end-to-end latency and hardware latency, thus improving interaction quality.
Implementation Method 1
an interruption module having a photo interrupter circuit configured to detect the contact, which is used at least in part to measure the latency
Implementation Method 2
a laser and photo diode which may be used to measure the latency by calibrating velocity of a contact
Data Source
AI summary
Panning latency measurement techniques are described. In one or more implementations, a test apparatus includes one or more motors configured to move one or more contacts at least proximal to one or more sensors of a device to be detectable as a movement. The test apparatus also includes one or more modules implemented at least partially in hardware to measure latency of the device to recognize the movement of the one or more contacts.