PATENT CLAIM ANALYSIS

Application Number: 15956911
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-11
Patent Classification: ["315", "053000"]

Abstract:
A light emitting element driving apparatus includes the following: current source; error amplifier generating error signal based on comparison of a first reference voltage with the highest voltage among total forward drop voltages of element arrays or feedback voltage corresponding to a drive voltage; first and second switches for ON/OFF control to apply the feedback voltage to first and second input terminals of the error amplifier respectively; slope voltage generating circuit; PWM comparator generating a pulse modulation signal; drive amplifier controlled by the pulse modulation signal and drives a switching element supplying the drive voltage to the element arrays; PWM width detector that outputs a pulse width detection signal having different levels between when the pulse width is less than predetermined threshold value and when equal to or greater than the threshold value, and switches ON/OFF of the first and second switches based on the pulse width detection signal.

Claim (Index 1):
A light emitting element driving apparatus, comprising:\n a current source configured to supply a current to each of a plurality of element arrays in which a plurality of light emitting elements are connected in series; an error amplifier configured to generate an error signal based on a comparison of a first reference voltage with one of the highest voltage among total forward drop voltages of the plurality of element arrays, and a feedback voltage corresponding to a drive voltage supplied to the plurality of element arrays; a first switch configured to perform an ON/OFF control to apply the feedback voltage to a first input terminal of the error amplifier or not to apply the feedback voltage to the first input terminal; a second switch configured to perform an ON/OFF control to apply the highest voltage among the total forward drop voltages to a second input terminal of the error amplifier or not to apply the highest voltage to the second input terminal; a slope voltage generating circuit configured to generate a slope voltage; a PWM comparator configured to generate a pulse modulation signal having a duty ratio based on the slope voltage and the error signal; a drive amplifier that is controlled by the pulse modulation signal output from the PWM comparator and drives a switching element configured to supply the drive voltage to the plurality of element arrays; and a PWM width detector configured to detect a pulse width of the pulse modulation signal, wherein the PWM width detector outputs a pulse width detection signal having different levels between when the pulse width of the pulse modulation signal is less than a predetermined threshold value and when the pulse width is equal to or greater than the threshold value, and switches ON/OFF of the first switch and the second switch based on the pulse width detection signal.

Metadata:
- Claim Count in Document: 32.0
- Percentile: 91.0
- Lexical Diversity: 2.0
- Patent Class: 315.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['13315348', '13354387', '14425517', '14064277', '15933826']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6848530791533456
- 35 USC 102 Novelty (BERT): 0.4962327357402456
- Combined Prediction Score: 0.6659910448120355
- Mean Citation Score: 240.27907400000004
- Max Citation Score: 248.30241
- Similarity Product: 206.40508126673168

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