PATENT CLAIM ANALYSIS

Application Number: 16014664
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2018-10
Patent Classification: ["345", "174000"]

Abstract:
A method of differential self-capacitance measurement is used to enhance a signal-to-noise ratio of sense lines in a touch panel display, thereby improving touch sensor accuracy. The differential self-capacitance measurement is implemented for a touch panel using charge sharing between adjacent sense lines of the touch panel matrix. Sequential differential self-capacitance measurements can be compared with one another by computing the difference |C S1 −C S2 |−|C S2 −C S1 | to sense a change caused by an intervening event. By scanning the entire touch panel matrix, events can be tracked across the touch panel.

Claim (Index 1):
A circuit, comprising:\n an output buffer having a first input, a second input and an output; a first sense line capacitor coupled to a power supply node via a first switch configured to be turned on during a first time period to charge the first sense line capacitor; a second sense line capacitor coupled to a ground node via a second switch configured to be turned on during the first time period to discharge the second sense line capacitor; a first charge sharing switch in line between the first and second sense line capacitors and configured to be turned on during a second time period, after the first time period, to engage the first and second sense line capacitors in charge sharing; a second charge sharing switch coupled between the first sense line capacitor and the first input of the output buffer and configured to be turned on during a third first time period, after the second time period, to couple to the first sense line capacitor to the output buffer, the output buffer being configured to receive a reference voltage at the second input, compare a common voltage sensed at the first sense line capacitor with the reference voltage, and output a voltage representative of a difference between the common voltage and the reference voltage to determine a location on a touch panel where a finger is adjacent to the touch panel; and a tunable voltage divider coupled to the second input and configured to output the reference voltage to the second input.

Metadata:
- Claim Count in Document: 47.0
- Percentile: 94.0
- Lexical Diversity: 1.60317
- Patent Class: 345.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15199792', '13066183', '15159308', '15291531', '14946676']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6045275002599955
- 35 USC 102 Novelty (BERT): 0.510160316171801
- Combined Prediction Score: 0.5950907818511761
- Mean Citation Score: 229.231576
- Max Citation Score: 310.2046
- Similarity Product: 302.8662117892742

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test