PATENT CLAIM ANALYSIS

Application Number: 15888027
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-06
Patent Classification: ["315", "077000"]

Abstract:
A converter controller controls a switching converter. A current detection circuit generates a current detection signal V CS  that corresponds to a coil current I L  of the switching converter. An error amplifier amplifies the difference between the current detection signal V CS  and an analog signal V ADIM  that indicates a current to be supplied to a semiconductor light source, so as to generate an error signal V ERR . A hysteresis comparator compares the current detection signal V CS  with an upper threshold signal V THH  and a lower threshold signal V THL  determined according to the error signal V ERR , and generates a control pulse S CNT  that corresponds to a comparison result. A driver drives a switching transistor according to the control pulse S CNT .

Claim (Index 1):
A lighting circuit comprising:\n a switching converter structured to supply electric power to a semiconductor light source; and a converter controller structured to control the switching converter, wherein the converter controller comprises:\n a current detection circuit structured to generate a current detection signal that corresponds to a driving current supplied from the switching converter to the semiconductor light source; \n a hysteresis comparator structured to compare the current detection signal with an upper threshold signal and a lower threshold signal, and to generate a control pulse according to a comparison result; \n a driver structured to drive a switching transistor of the switching converter according to the control pulse; \n a frequency detection circuit structured to generate a frequency detection signal that indicates a frequency of the control pulse; and \n a threshold voltage adjustment circuit structured to change a voltage difference between the upper threshold signal and the lower threshold signal such that the frequency detection signal approaches a reference value, \n wherein the threshold voltage adjustment circuit comprises an error signal generating circuit structured to generate a frequency error signal that corresponds to a difference between the frequency detection signal and the reference value, and wherein the threshold voltage adjustment circuit is structured to change the voltage difference between the upper threshold signal and the lower threshold signal according to the frequency error signal.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 88.0
- Lexical Diversity: 2.14286
- Patent Class: 315.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15686520', '14874005', '14855439', '15887802', '15784147']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7424587065330771
- 35 USC 102 Novelty (BERT): 0.5193449304121756
- Combined Prediction Score: 0.720147328920987
- Mean Citation Score: 305.461404
- Max Citation Score: 338.69284
- Similarity Product: 316.943455709877

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