公开(公告)号：US09865197B2

公开(公告)日：2018-01-09

申请号：US14797354

申请日：2015-07-13

Applicant: STMicroelectronics International N.V.

Inventor： Jerome Nebon ,  Jean-Marie Permezel

IPC: G09G3/3225 ,  G09G3/3258

CPC classification number: G09G3/3258 ,  G09G3/3225 ,  G09G2300/0413 ,  G09G2320/0247 ,  G09G2320/0261 ,  G09G2320/043 ,  G09G2340/0435 ,  G09G2360/147

Abstract: A device includes an OLED pixel and a control circuit controlled at a refresh rate thereof. The device includes first and second dummy control circuits having similar operating characteristics to the control circuit. A controller and logic circuit switch on the first and second dummy control circuits and apply an input voltage so the first and second dummy control circuits output first and second output voltages. At a first time, the controller and logic circuit switch off the second dummy control circuit so a leakage current flows through the second dummy control circuit to ground, causing the second output voltage to reduce. Comparison circuitry determines a second time at which, due to the reduction of the second output voltage, a difference between the first and second output voltages is greater than a threshold. Determination circuitry determines the refresh frequency based upon elapsed time between the first and second times.

公开(公告)号：US09831764B2

公开(公告)日：2017-11-28

申请号：US14549458

申请日：2014-11-20

Applicant: STMicroelectronics International N.V.

Inventor： Phalguni Bala ,  Hiten Advani

IPC: H02M3/06 ,  H02M1/00

CPC classification number: H02M3/06 ,  H02M2001/0022

Abstract: According to an embodiment, a circuit includes a protection voltage generator coupled to a first voltage node, a second voltage node, and a ground voltage node, the protection voltage generator configured to generate a plurality of protection voltages at a first plurality of nodes based on the first voltage node and the second voltage node, and a voltage protection ladder coupled between the first voltage node and a low voltage circuit, the voltage protection ladder coupled to the plurality of protection voltages at the first plurality of nodes, the voltage protection ladder configured to generate a first low voltage based on the first voltage node and the plurality of protection voltages.

公开(公告)号：US09825519B2

公开(公告)日：2017-11-21

申请号：US14788704

申请日：2015-06-30

Applicant: STMicroelectronics International N.V.

Inventor： Saurabh Sona

IPC: H02H7/09 ,  H02M1/32 ,  H02P7/00 ,  H02P29/024 ,  H02M5/458 ,  H02H7/122

CPC classification number: H02M1/32 ,  H02H7/1222 ,  H02M5/458 ,  H02P7/00 ,  H02P29/0241

Abstract: An overvoltage protection device protects a half bridge circuit that receives a supply voltage. The overvoltage protection device includes a high speed overvoltage detector that receives the supply voltage, detects whether an overvoltage situation is present, and outputs an overvoltage signal that disables the switches of the half bridge circuit before the switches can be damaged by the overvoltage situation. With both the switches of the half-bridge disabled, the entire supply voltage appears across the two switches in series, by which each switch only receives half the entire voltage. Thus, by quickly disabling both switches of the half-bridge each switch only needs a maximum voltage rating equal to half the maximum voltage rating of the half bridge circuit as a whole. This leads to reduced size and cost for the switches of the half-bridge circuit.

公开(公告)号：US09819913B2

公开(公告)日：2017-11-14

申请号：US14836143

申请日：2015-08-26

Applicant: STMICROELECTRONICS INTERNATIONAL N.V.

Inventor： Mahesh Chandra ,  Brejesh Lall

IPC: H04N5/225 ,  H04N9/04 ,  H04N5/347

CPC classification number: H04N9/045 ,  H04N5/347

Abstract: An image sensor device may include an array of image sensing pixels with adjacent image sensing pixels being arranged in macropixel, and a processor coupled to the array of image sensing pixels. The processor may be configured to receive pixel signals from the array of image sensing pixels, and arrange the received pixel signals into macropixel signal sets for respective macropixels. The processor may be configured to perform, in parallel, an image enhancement operation on the received pixel signals for each macropixel signal set to generate enhanced macropixel signals, and transmit the enhanced macropixel signals.

公开(公告)号：US09760822B2

公开(公告)日：2017-09-12

申请号：US14761291

申请日：2014-01-14

Applicant: STMicroelectronics International N.V.

Inventor： Vinko Kunc ,  Maksimiljan Stiglic ,  Kosta Kovacic ,  Albin Pevec ,  Anton Stern

IPC: G06K19/07 ,  G06K7/10 ,  H04B5/00

CPC classification number: H04B5/0056 ,  G06K7/10297 ,  G06K19/0701 ,  G06K19/0705 ,  G06K19/0723 ,  G06K19/0726 ,  H04B5/0075 ,  H04B5/0081

Abstract: An actively transmitting tag detects a shift of a phase of an antenna signal (as) with regard to a phase of a transmitted signal (ts) in time intervals with a length of one half-period of a subcarrier, in which time intervals it transmits high-frequency wave packets with their phase being inverted according to a communication protocol at the ends of said half-periods. Generation of said wave packets is controlled by said phase shift in a way that said phase shift retains its absolute value at transitions into subsequent half-periods. Synchronizing the tag's transmission to a received interrogator signal carried out even during tag's transmitting enables the tag to transmit according to protocol ISO 14443 B by inverting a phase at transitions between said half-periods. Said synchronizing is carried out although no time window without a tag transmitting exists within the transmitted data frame.

公开(公告)号：US09753480B2

公开(公告)日：2017-09-05

申请号：US13962958

申请日：2013-08-09

Applicant: STMicroelectronics International N.V.

Inventor： Rajesh Narwal

IPC: G05F1/46 ,  G05F3/08 ,  G05F1/565 ,  H02M1/00

CPC classification number: G05F3/08 ,  G05F1/46 ,  G05F1/462 ,  G05F1/468 ,  G05F1/56 ,  G05F1/565 ,  H02M2001/0025

Abstract: An embodiment of an arrangement includes a voltage regulator configured to provide an output voltage, said voltage regulator configured to receive one of a plurality of different regulator reference voltages and a controller configured to provide a selection signal, said selection signal being used to control which of said regulator reference voltages said voltage regulator receives.

公开(公告)号：US20170184681A1

公开(公告)日：2017-06-29

申请号：US15455321

申请日：2017-03-10

Applicant: STMicroelectronics, Inc. ,  STMicroelectronics International N.V.

Inventor： K. R. Hariharasudhan ,  Frank J. Sigmund

IPC: G01R31/36

Abstract: An electronic device includes a processor coupled to a battery and to determine whether the battery is being charged or discharged. If the battery being is being discharged, the processor operates to calculate an amount by which the battery has discharged since a preceding calculation of remaining capacity of the battery, compensate the amount by which the battery has discharged for a condition of the battery, and calculate a remaining capacity of the battery as a function of the amount by which the battery has discharged. If the battery is being charged, the processor operates to calculate an amount by which the battery has charged since a preceding calculation of remaining capacity of the battery, compensate the amount by which the battery has charged for a condition of the battery, and calculate the remaining capacity of the battery as a function of the amount by which the battery has charged.

公开(公告)号：US09690344B2

公开(公告)日：2017-06-27

申请号：US14516381

申请日：2014-10-16

Applicant: STMicroelectronics International N.V.

Inventor： Pratik Damle ,  Gaurav Mathur ,  Vikram Singh

IPC: G06F1/26 ,  G06F1/30 ,  G06F1/32

CPC classification number: G06F1/263 ,  G06F1/30 ,  G06F1/3203

Abstract: An embodiment is a circuit including a main power supply coupled to a first node, a charge reservoir coupled between a second node and ground, an isolation circuit coupled between the first node and the second node, and a plurality of secondary power supplies coupled to the second node, the plurality of secondary power supplies configured to receive power from the main power supply. The circuit further includes a detector circuit coupled to the first node, the detector circuit configured to detect the presence and absence of a first supply voltage at the first node, and a timing circuit coupled between the detector circuit and the plurality of secondary power supplies, the timing circuit configured to enable and disable the plurality of secondary power supplies in predetermined sequences based on the detection of the first supply voltage by the detector circuit.

公开(公告)号：US09685209B1

公开(公告)日：2017-06-20

申请号：US15132388

申请日：2016-04-19

Applicant: STMicroelectronics International N.V.

Inventor： Kedar Janardan Dhori ,  Vinay Kumar ,  Ashish Kumar

IPC: G11C7/00 ,  G11C7/12 ,  G11C7/14 ,  G11C7/06

CPC classification number: G11C7/12 ,  G11C7/062 ,  G11C7/08 ,  G11C7/14 ,  G11C7/227 ,  G11C11/419

Abstract: A sense amplifier enable signal generating circuit includes an input coupled to a dummy bit line of a memory. A voltage comparator circuit compares a voltage on the dummy bit line to a threshold voltage and generates an output signal when the voltage falls below that threshold voltage. A multi-bit counter circuit counts a count value in response to the output signal. A pull-up circuit pulls up the voltage on the dummy bit line in response to the output signal. A count comparator circuit compares the count value to a count threshold and generates a sense amplifier enable signal when the count value equals the count threshold.

公开(公告)号：US09678333B2

公开(公告)日：2017-06-13

申请号：US14702833

申请日：2015-05-04

Applicant: STMicroelectronics International N.V.

Inventor： Nir Goren

IPC: G02B26/08 ,  G02B26/10 ,  B81B3/00

CPC classification number: G02B26/0833 ,  B81B3/0045 ,  G02B26/0841 ,  G02B26/10 ,  G02B26/105

Abstract: A micromechanical mirror includes a mobile mass carrying a mirror element and provided in a body including semiconductor material. A driving structure is coupled to the mobile mass to cause a scanning movement thereof. The driving structure is configured to generate a combination of a two or more sinusoidal resonant modes in the micromechanical mirror at respective resonant frequencies. This combination approximates a scanning pattern of the mobile mass defined by a linear function which may, in particular, be a triangular shaped function.