PATENT CLAIM ANALYSIS

Application Number: 16039126
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-01
Patent Classification: ["315", "291000"]

Abstract:
The present disclosure discloses a light-emitting diode (LED) driver comprising a controller and a main circuit. The controller is configured to receive a dimming signal for dimming an LED load and use a current hysteresis control to generate a control signal, wherein a hysteresis width of the current hysteresis control varies with the dimming signal. The main circuit comprises a front-end stage configured to receive an AC input voltage and output a DC bus voltage, and a back-end stage configured to receive the bus voltage and responsive to the control signal, output a desired drive current through output terminals to the LED load so as to produce a target illumination intensity. The present disclosure widens the dimming depth of analog dimming in the LED dimming technology, achieves deep dimming and satisfies good dimming linearity in the entire dimming range.

Claim (Index 4):
The LED driver as claimed in  claim 2 , wherein the controller comprises a first module, a second module and an auxiliary circuit,\n wherein the first module is configured to receive the dimming signal (DS) and generate an upper limit current (I peak ) according to the dimming signal (DS); wherein the auxiliary circuit comprises an auxiliary capacitor (C 1 ) and an auxiliary resistor (R 1 ), one terminal of the auxiliary capacitor (C 1 ) is grounded and the other terminal of the auxiliary capacitor (C 1 ) is connected with one terminal of the auxiliary resistor (R 1 ), the other terminal of the auxiliary resistor (R 1 ) is connected with a positive terminal of the output terminals, and the other terminal of the auxiliary capacitor (C 1 ) is connected to the second module so as to provide a capacitor voltage (V C ) of the auxiliary capacitor (C 1 ) to the second module; and wherein the second module is configured to detect a switch current (I S ) flowing through the controllable switch (SW 1 ) and switch on or switch off the controllable switch (SW 1 ) based on the detected switch current (I S ), when the switch current (I S ) reaches the upper limit current (I peak ), the controllable switch (SW 1 ) is switched off, and when the capacitor voltage (V C ) reaches a threshold voltage (V th ), the controllable switch (SW 1 ) is switched on; and wherein the hysteresis width is determined by a charging time required by the auxiliary capacitor (C 1 ) charged from zero voltage to the threshold voltage (V th ).

Metadata:
- Claim Count in Document: 20.0
- Percentile: 95.0
- Lexical Diversity: 2.09859
- Patent Class: 315.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15510689', '13884960', '14264477', '14841832', '14841806']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7251396757745269
- 35 USC 102 Novelty (BERT): 0.4731660490515097
- Combined Prediction Score: 0.6999423131022252
- Mean Citation Score: 181.392138
- Max Citation Score: 194.3801
- Similarity Product: 160.38174696308968

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

Dataset: test