PATENT CLAIM ANALYSIS

Application Number: 16284820
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-10
Patent Classification: ["315", "291000"]

Abstract:
A controller for controlling a plurality of serially-connected LED strings includes a reference voltage generator configured to generate a plurality of reference voltages. The reference voltage generator is further configured to vary the plurality of reference voltages based on a sampled voltage signal. The sampled voltage signal can include one or both of a peak voltage of the rectified input AC voltage and a peak voltage of an LED diode forward voltage Vf. The controller further includes a plurality of linear regulators, each linear regulator coupled between a cathode of a corresponding LED string and a common current sense node, and each linear regulator is configured to regulate a current through a corresponding LED string according to a corresponding reference voltage.

Claim (Index 1):
A controller for controlling a light-emitting diode (LED) string that includes one or more light-emitting diodes connected in series, the controller comprising:\n an input node for receiving a rectified input AC (alternating current) voltage; a common current sense node for sensing current flow in the LED string; a reference voltage generator configured to generate a reference voltage, the reference voltage generator further configured to vary the reference voltage based on a sampled voltage signal, the sampled voltage signal comprising one or both of a peak voltage of the rectified input AC voltage and a peak voltage of an LED diode forward voltage, wherein the reference voltage generator is configured to: respond to one or both of a peak voltage of the rectified input AC voltage and a peak voltage of an LED diode forward voltage; in response to the rectified input AC voltage, decrease the reference voltage when the sampled voltage signal is increased, and increase the reference voltage when the sampled voltage signal is decreased; and when responding to the LED diode forward voltage, increase the reference voltage when the sampled voltage signal is increased, and decrease the reference voltage when the sampled voltage signal is decreased; a linear regulator, coupled between a cathode of the LED string and a common current sense node, the linear regulator configured to control a current through the LED string based the reference voltage; wherein the controller is configured to regulate a current through the LED string to be in phase with the rectified input AC voltage and to maintain a target average LED current over changes in one or both of the rectified input AC voltage and the LED diode forward voltage.

Metadata:
- Claim Count in Document: 47.0
- Percentile: 99.0
- Lexical Diversity: 2.15254
- Patent Class: 315.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15956732', '13659926', '13889789', '15656892', '14936481']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.681248947681517
- 35 USC 102 Novelty (BERT): 0.6053066313785436
- Combined Prediction Score: 0.6736547160512197
- Mean Citation Score: 317.5159700000001
- Max Citation Score: 505.36255
- Similarity Product: 493.6553207406552

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