PATENT CLAIM ANALYSIS

Application Number: 15935123
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-09
Patent Classification: ["345", "062000"]

Abstract:
A pixel circuit for a display device includes a drive transistor configured to control an amount of current to a light-emitting device depending upon a voltage applied to a gate of the drive transistor; a second transistor connected to the gate of the drive transistor and a second terminal of the drive transistor, such that when the second transistor is in an on state the drive transistor becomes diode-connected such that the gate and the second terminal of the drive transistor are connected through the second transistor; a light-emitting device that is connected at a first node to a third terminal of the drive transistor and at a second node to a first voltage supply; a third transistor connected to the first node of the light-emitting device, which connects a data voltage to the first node of the light-emitting device; a fourth transistor that is connected between the second terminal of the drive transistor and a second voltage supply; and at least one capacitor having a first plate that is connected to the gate of the drive transistor and a second plate that is connectable to a reference signal. The pixel circuit is operable during a phase preceding the emission phase including applying a data voltage to the first node of the light-emitting device and the third terminal of the drive transistor, the data voltage being set so that a voltage across the light-emitting device is lower than a threshold voltage of the light emitting device.

Claim (Index 13):
The operating method of  claim 9 , wherein the pixel circuit is operable in an initialization phase, a combined programming and compensation phase, and in the emission phase;\n wherein the pixel circuit further comprises:\n a second transistor connected to the gate of the drive transistor and a second terminal of the drive transistor, such that when the second transistor is in an on state the drive transistor becomes diode-connected such that the gate and the second terminal of the drive transistor are connected through the second transistor; \n a third transistor connected to the first node of the light-emitting device, which connects a data voltage to the first node of the light-emitting device; \n a fourth transistor that is connected between the second terminal of the drive transistor and a second voltage supply; and \n at least one capacitor having a first plate that is connected to the gate of the drive transistor and a second plate that is connectable to a reference signal; \n the operating method comprising the steps of: during the initialization phase, reducing memory effects from previous frames by performing the steps of:\n keeping the fourth transistor in the on state and keeping the second and third transistors in an off state; \n inputting the reference signal wherein the reference signal during the initialization phase is set at a level corresponding to the drive transistor being in an off state; \n switching the second and third transistors from the off state to the on state, wherein the drive transistor becomes diode-connected through the second transistor, thereby connecting the gate of the drive transistor to the second voltage supply; and \n applying a data voltage VDAT to the first terminal of the light-emitting device, VDAT being set so that the voltage across the light-emitting device is lower than a threshold voltage; \n during the combined programming and compensation phase, at least partially compensating a threshold voltage of the drive transistor by the steps of:\n placing the fourth transistor in an off state; \n changing the reference signal to a level for compensation for variations of a threshold voltage of the drive transistor; and \n updating VDAT to a data voltage for a current pixel; \n and during the emission phase, performing the steps of:\n placing the second and third transistors in an off state; \n adjusting the reference signal to turn on the drive transistor; \n placing the fourth transistor in the on state to connect the second power supply to the drive transistor; and \n controlling an amount of current to the light-emitting device depending upon a voltage applied to a gate of a drive transistor.

Metadata:
- Claim Count in Document: 22.0
- Percentile: 90.0
- Lexical Diversity: 3.32468
- Patent Class: 345.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15933474', '15756973', '11067669', '13972771', '13105823']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.628288156645614
- 35 USC 102 Novelty (BERT): 0.5414905492697601
- Combined Prediction Score: 0.6196083959080286
- Mean Citation Score: 288.9371
- Max Citation Score: 378.81326
- Similarity Product: 297.5230176518035

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