Production testing of a capacitive touch sensing device
First Claim
1. A method for production testing of a capacitive touch sensing device, said method comprising:
- sampling a first value corresponding to a first channel of said capacitive touch sensing device when said capacitive touch sensing device is in production;
sampling a second value corresponding to said first channel of said capacitive touch sensing device when said capacitive touch sensing device has a self-test capacitive circuit applying a signal to said capacitive touch sensing device; and
comparing said first value and said second value to determine a production testing result for said first channel of said capacitive touch sensing device, wherein said sampling said second value and said comparing said first value and said second value occur during production of said capacitive touch sensing device.
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Abstract
In one embodiment, a method for production testing of a capacitive touch sensing device is disclosed. In this embodiment, the present technology for production testing of a capacitive touch sensing device samples a first value corresponding to a first channel of a capacitive touch sensing device when the capacitive touch sensing device is in production. The present embodiment also samples a second value corresponding to the first channel of the capacitive touch sensing device when the capacitive touch sensing device has a self-test capacitive circuit applying a signal thereto. The present embodiment compares the first value and the second value to determine a production testing result for the first channel of the capacitive touch sensing device, wherein the sampling of the second value and the comparing the first value and the second value occur during production of the capacitive touch sensing device.
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Citations
25 Claims
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1. A method for production testing of a capacitive touch sensing device, said method comprising:
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sampling a first value corresponding to a first channel of said capacitive touch sensing device when said capacitive touch sensing device is in production; sampling a second value corresponding to said first channel of said capacitive touch sensing device when said capacitive touch sensing device has a self-test capacitive circuit applying a signal to said capacitive touch sensing device; and comparing said first value and said second value to determine a production testing result for said first channel of said capacitive touch sensing device, wherein said sampling said second value and said comparing said first value and said second value occur during production of said capacitive touch sensing device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A production testing system for a capacitive touch sensing device, said production testing system comprising:
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a self-test capacitive circuit configured to sample a plurality of values corresponding to a first channel of a capacitive touch sensing device when said capacitive touch sensing device is in production; and a testing unit coupled to said self-test capacitive circuit, said testing unit configured to function cooperatively with said self-test capacitive circuit to generate a production testing result for said first channel of said capacitive touch sensing device. - View Dependent Claims (17, 18, 19)
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20. A computer-readable medium having computer readable code embodied thereon for causing a computer to perform a method for production testing of a capacitive touch sensing device, said method comprising:
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receiving a first sampled value corresponding to a first channel of said capacitive touch sensing device when said capacitive touch sensing device is in production; receiving a second sampled value corresponding to said first channel of said capacitive touch sensing device when said capacitive touch sensing device has a self-test capacitive circuit applying a signal thereto; and determining a production testing result for said first channel of said capacitive touch sensing device by comparing said first sampled value and said second sampled value. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification