24H2 HLK Windows Touch Screen Test Error

Question

Hello sir,

I have a question regarding the error message that appeared during the 24H2 HLK Touch Screen Test.

The system settings are currently set to PSR(Panel Self Refresh) ON and VRR ON.

During the 'Mobar' Test in the 'Windows Touch Ux' Test, the following error message appeared.

Error message : Hid Error: [HID] Invalid scan time (Delta > 16.67ms more than 1% of the time)

I am curious about the exact timing the 16.67ms value mentioned in the error message was measured and how delta was calculated.

Can you please provide an explanation?

I look forward to your help.

Thank you.

Answer

Hello,

Thank you for posting in Q&A forum.

Based on your description, if more than 1% of all touch events have a sampling interval that exceeds 16.67 milliseconds, the system will report this error.

16.67ms is calculated based on a 60Hz refresh rate, because 1 second (1000 milliseconds) divided by 60 (refresh rate) equals approximately 16.67 milliseconds. This means that under ideal conditions, the sampling interval for each touch event should be 16.67 milliseconds.

Delta is the time interval between two consecutive touch events. Under ideal conditions, this time interval should be close to 16.67 milliseconds. The Delta value is continuously measured during the test, and for each pair of consecutive touch events, the time difference between them is calculated.

I hope the information above is helpful.

Best Regards,

Yanhong Liu

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