PATENT CLAIM ANALYSIS

Application Number: 15767379
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-10
Patent Classification: ["315", "122000"]

Abstract:
AC LED light engines powered directly from the AC power line contain circuitry of resistors, capacitors, diodes and transistors which enables an array of LEDs to efficiently produce light with a relatively low level of flicker as perceived by the human eye. The LEDs are driven by a current which is alternately capacitively-limited and resistively-limited. Capacitively-limited pulses of current are combined with resistively-limited pulses of current so that the resulting output current ripple is at frequencies of 240 Hz or above which the human eye cannot perceive. The combination of resistively-limited current and capacitively-limited current results in a current drain from the power line which is generally sinusoidal and can have a power factor in excess of 0.90, and a flicker index below 0.2.

Claim (Index 12):
A driverless LED light engine having first and second AC power line terminals, the light engine comprising:\n a plurality of LED devices connected in series as a string of LEDs, the string of LEDs defined as having a first end termination and a second, opposing end termination, with a midpoint of the string of LEDs connected to the first AC power line terminal; a first rectifier diode connected between the first end termination of the string of LEDs and the second AC power line terminal; a second rectifier diode connected between the second end termination of the string of LEDs and the second AC power line terminal, wherein a first half of the string of LEDs conducts galvanic current during positive power line voltage half cycles from an AC power source and a second half of the string of LEDs conducts galvanic current during negative power line voltage half cycles from the AC power source; a first bias capacitor connected across a portion of the string of LEDs in such a manner as to cause a substring of LEDs in the first half of the string of LEDs to be illuminated before the beginning of the power line voltage half cycle corresponding to the galvanic forward conduction of the first half of the LED string; and a second bias capacitor connected across a portion of the string of LEDs in such a manner as to cause a substring of LEDs in the second half of the string of LEDs to be illuminated before the beginning of the power line voltage half cycle corresponding to the galvanic forward conduction of the second half of the LED string.

Metadata:
- Claim Count in Document: 50.0
- Percentile: 91.0
- Lexical Diversity: 1.71429
- Patent Class: 315.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14884879', '14595565', '15130033', '12799953', '15744110']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7642388456670426
- 35 USC 102 Novelty (BERT): 0.6402352429153798
- Combined Prediction Score: 0.7518384853918764
- Mean Citation Score: 437.838064
- Max Citation Score: 596.415
- Similarity Product: 589.4193273308872

Labels:
- Claim Label 101: 0
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 0

Dataset: test