PATENT CLAIM ANALYSIS

Application Number: 15755014
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2019-08
Patent Classification: ["315", "294000"]

Abstract:
A LED driving circuit and method for balancing efficiency and a power factor. The circuit comprises a voltage input module, an LED load, a constant current control module and a current turn-off slope control module for adjusting the turn-off slope of the current flowing through the LED load, such that a compromise between efficiency and power factor is achieved. When an input voltage is higher than a setting voltage, the current flowing through the LED load is turned off, such that the power consumption is reduced; in addition, the efficiency and power factor are balanced by adjusting the turn-off slope of the current. According to the present invention, a compensation capacitor is used to control the average current in an alternating current period and to limit peak current, thereby implementing constant power output within a wide range of input voltage.

Claim (Index 3):
The LED driving circuit for balancing efficiency and a power factor according to  claim 1 , characterized in that the constant current control module comprises: a power switch transistor, a sampling resistor, a first reference voltage generation unit, and a comparison unit; a drain terminal of the power switch transistor is connected to the output terminal of the LED load, and a source terminal of the power switch transistor is grounded via the sampling resistor; an input terminal of the first reference voltage generation unit is connected to the current turn-off slope control module; a first input terminal of the comparison unit is connected to the source terminal of the power switch transistor, a second input terminal of the comparison unit is connected to the first reference voltage generation unit, and an output terminal of the comparison unit is connected to a gate terminal of the power switch transistor.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 88.0
- Lexical Diversity: 2.21739
- Patent Class: 315.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15755020', '13571813', '13696679', '10879315', '15227223']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.732446827245391
- 35 USC 102 Novelty (BERT): 0.5179902668860324
- Combined Prediction Score: 0.7110011712094552
- Mean Citation Score: 232.229048
- Max Citation Score: 323.08615
- Similarity Product: 284.75894330085214

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