公开(公告)号：US20240045522A1

公开(公告)日：2024-02-08

申请号：US18354707

申请日：2023-07-19

Applicant: EM Microelectronic-Marin SA

Inventor： Sylvain GROSJEAN ,  Evan LOJEWSKI ,  Brian MOORE ,  Jérémy SCHLACHTER ,  Lorenzo PIEROBON

IPC: G06F3/038 ,  G06F3/0354 ,  G06F3/03

CPC classification number: G06F3/038 ,  G06F3/03543 ,  G06F3/0304

Abstract: A method for applying illumination correction for an optical computer mouse, includes: flashing a light source of the mouse directed towards a surface; accumulating voltage on a pixel array of the mouse to obtain raw pixel values of an image frame in response to detecting light reflected from the surface; applying analog correction to the raw pixel values based on digital gain coefficients to obtain an array of corrected pixel values forming corrected image data; digitizing the corrected image data with an analog-to-digital converter to obtain digital pixel values forming digital image data; and updating the digital gain coefficients so that a gain coefficient corresponding to a digital pixel value is incremented if the digital pixel value is below or equal to a given pixel threshold value, and so that the gain coefficient is decremented if the digital pixel value is above the given pixel threshold value.

公开(公告)号：US20240045521A1

公开(公告)日：2024-02-08

申请号：US18257184

申请日：2021-12-14

Applicant: EM Microelectronic-Marin SA

Inventor： Sylvain GROSJEAN ,  Jérémy SCHLACHTER

IPC: G06F3/038 ,  G06F3/0354

CPC classification number: G06F3/038 ,  G06F3/03543

Abstract: In a sensing device of a pointing device, like a mouse, said pointing device includes at least one light source configured to illuminate a surface, at least one first secondary photodetector, at least one second secondary photodetector, and at least one primary photodetector. Each individual storage element of photodetectors is weighted and compared such as to sense a displacement of the pointing device.

公开(公告)号：US20130191060A1

公开(公告)日：2013-07-25

申请号：US13733608

申请日：2013-01-03

Applicant: EM MICROELECTRONIC-MARIN SA

Inventor： Sylvain GROSJEAN ,  Christophe ENTRINGER

IPC: G01R27/26

CPC classification number: G01R27/2605 ,  G01D5/24 ,  G01L5/165 ,  G01P15/125

Abstract: The method is for measuring a physical parameter via an electronic circuit connected to a two differential capacitor sensor having two fixed electrodes and a common moving electrode. The circuit supplies first and second digital measuring signals. Each measuring cycle consists on biasing fixed electrodes by a first biasing and a second biasing reverse of the first biasing, alternated with biasing the electrodes by the measuring voltage based on first and second digital signals. Each conversion starts by a small step value added to or subtracted from each digital signal in each cycle. If the successive identical amplifier output states counted or counted down by a counter is higher than a threshold, a large step value is added to or subtracted from the digital signals in each cycle. Re-adaptation to the small step value occurs when a sign change is detected in the counter, until the conversion end.

Abstract translation: 该方法用于通过连接到具有两个固定电极和公共移动电极的两个差分电容传感器的电子电路来测量物理参数。 该电路提供第一和第二数字测量信号。 每个测量周期包括通过第一偏压的第一偏压和第二偏压的第二偏置反向来偏压固定电极，所述第一偏压与第一和第二数字信号通过测量电压偏置电极交替。 每个转换开始于在每个周期中从每个数字信号添加或减去的小步长值。 如果由计数器计数或递减计数器的连续相同的放大器输出状态高于阈值，则在每个周期中向数字信号添加或减去较大的步长值。 当在计数器中检测到符号变化时，才会重新适应小步长值，直到转换结束。

公开(公告)号：US20240036655A1

公开(公告)日：2024-02-01

申请号：US18257175

申请日：2021-12-14

Applicant: EM Microelectronic-Marin SA

Inventor： Sylvain GROSJEAN ,  Jérémy SCHLACHTER

IPC: G06F3/03

CPC classification number: G06F3/0304

Abstract: In a method for sensing a displacement of a pointing device, like a mouse, said pointing device includes at least one light source configured to illuminate a surface, at least one first secondary photodetector, at least one second secondary photodetector, and at least one primary photodetector. Each individual value of the photodetectors is weighted and compared such as to sense said displacement of the pointing device.

公开(公告)号：US20160011014A1

公开(公告)日：2016-01-14

申请号：US14732257

申请日：2015-06-05

Applicant: EM MICROELECTRONIC-MARIN SA

Inventor： Christophe ENTRINGER ,  Sylvain GROSJEAN

IPC: G01D5/241

CPC classification number: G01D5/2417 ,  G01L1/142 ,  G01P15/125

Abstract: The present invention concerns an electronic measurement circuit for measuring a physical parameter. The circuit comprises: a measurement sensor comprising two differential mounted capacitors each comprising a fixed electrode, and a common electrode, common to the two capacitors which is arranged to be movable relative to each fixed electrode of the two capacitors in order to alter the capacitive value of each capacitor when the physical parameter is measured. The circuit further comprises a first integrator unit connected to the common electrode for integrating charge received from the measurement sensor, and comprising two integrators arranged to be connected alternately to the common electrode; a second integrator unit connected to the first integrator unit for integrating charge received from the first integrator unit; a comparator for comparing analogue output values from the second integrator unit; a switch circuit connected to the measurement sensor for switching different voltage values across the two capacitors; and a feedback circuit for feeding a digital output signal of the comparator to the switch circuit for controlling the operation of the switch circuit.

Abstract translation: 本发明涉及一种用于测量物理参数的电子测量电路。 该电路包括：测量传感器，包括两个差分安装的电容器，每个电容器包括固定电极和两个电容器共用的公共电极，该电容器布置成相对于两个电容器的每个固定电极可移动，以便改变电容值 当测量物理参数时，每个电容器。 电路还包括连接到公共电极的第一积分器单元，用于积分从测量传感器接收的电荷，并且包括两个积分器，被布置成交替地连接到公共电极; 连接到第一积分器单元的第二积分器单元，用于积分从第一积分器单元接收的电荷; 用于比较来自第二积分器单元的模拟输出值的比较器; 连接到测量传感器的开关电路，用于切换两个电容器的不同电压值; 以及用于将比较器的数字输出信号馈送到开关电路以控制开关电路的操作的反馈电路。

公开(公告)号：US20130300437A1

公开(公告)日：2013-11-14

申请号：US13867722

申请日：2013-04-22

Applicant: EM MICROELECTRONIC-MARIN SA

Inventor： Sylvain GROSJEAN ,  Christophe ENTRINGER

IPC: G01R27/26

CPC classification number: G01R27/2605 ,  G01D5/241

Abstract: A physical parameter is measured via an electronic circuit connected to a two capacitor sensor. The circuit includes an amplifier connected to the common capacitor electrode, a logic unit for digital processing amplifier data and supplying a digital measuring signal, a digital-analogue converter for supplying a measuring voltage based on the digital measuring signal, a switching unit for alternately supplying the measuring voltage to the first and second fixed capacitor electrodes, and a regulated voltage for negative biasing or a low voltage for positive biasing from a voltage supply source. A first phase consists in biasing the first fixed electrode with the measuring voltage from first binary word and reference voltage, and the second fixed electrode with low voltage, and a second phase consists in biasing the second fixed electrode with measuring voltage from second binary word, which is reverse of the first binary word, and the reference voltage.

Abstract translation: 通过连接到两个电容传感器的电子电路来测量物理参数。 该电路包括连接到公共电容器电极的放大器，用于数字处理放大器数据并提供数字测量信号的逻辑单元，用于基于数字测量信号提供测量电压的数模转换器，用于交替供应 第一和第二固定电容器电极的测量电压，以及用于负偏压的调节电压或来自电压源的正偏置的低电压。 第一相包括：利用来自第一二进制字和参考电压的测量电压和第二固定电极以低电压偏压第一固定电极，第二相包括用来自第二二进制字的测量电压来偏置第二固定电极， 与第一个二进制字相反，并且参考电压。

公开(公告)号：US20130187668A1

公开(公告)日：2013-07-25

申请号：US13733374

申请日：2013-01-03

Applicant: EM MICROELECTRONIC-MARIN SA

Inventor： Christophe ENTRINGER ,  Sylvain GROSJEAN

IPC: G01R27/26

CPC classification number: G01R27/2605 ,  G01D5/24 ,  G01L5/165 ,  G01P15/125

Abstract: The method is for measuring a physical parameter by an electronic circuit connected to a two differential capacitor sensor having two fixed electrodes and a common moving electrode. The electronic circuit supplies first and second digital measuring signals. Each measuring cycle consists on biasing the electrodes by the measuring voltage based on the first digital signal, connecting the fixed electrodes to a supply voltage source for a first biasing, biasing the electrodes by the measuring voltage based on the second digital measuring signal, and inversely connecting the fixed electrodes to a supply voltage source for a second biasing. In first successive measuring cycles, the first and second digital signals are adapted to each cycle by a large step value. In second successive measuring cycles, the first and second digital signals are adapted to each cycle by a small step value until the end of the conversion.

Abstract translation: 该方法用于通过连接到具有两个固定电极和公共移动电极的两个差分电容传感器的电子电路来测量物理参数。 电子电路提供第一和第二数字测量信号。 每个测量周期包括通过基于第一数字信号的测量电压偏置电极，将固定电极连接到用于第一偏置的电源电压源，基于第二数字测量信号将电极偏置测量电压，并且反向 将固定电极连接到用于第二偏置的电源电压源。 在第一连续测量循环中，第一和第二数字信号通过大的步进值适应于每个循环。 在第二个连续的测量循环中，第一和第二数字信号通过一个小的步长值适应每个周期，直到转换结束。

公开(公告)号：US20240004487A1

公开(公告)日：2024-01-04

申请号：US18255618

申请日：2021-12-14

Applicant: EM Microelectronic-Marin SA

Inventor： Sylvain GROSJEAN ,  Jérémy SCHLACHTER

IPC: G06F3/038 ,  G06F3/03

CPC classification number: G06F3/038 ,  G06F3/0304 ,  G06F3/03543

Abstract: An embodiment of the invention relates to a method for sensing a displacement of a pointing device, like a mouse. The pointing device includes at least one light source configured to illuminate a surface, at least one first secondary photodetector, at least one second secondary photodetector and at least one primary photodetector. Each individual value of photodetectors is weighted and compared to sense the displacement of the pointing device by comparing a plurality of storage elements.

公开(公告)号：US20180143219A1

公开(公告)日：2018-05-24

申请号：US15805232

申请日：2017-11-07

Applicant: EM Microelectronic-Marin SA

Inventor： Sylvain GROSJEAN ,  Yonghong TAO ,  Jean-Michel DAGA

IPC: G01P15/125 ,  G01P15/18 ,  G01P21/00

Abstract: The present invention concerns a capacitive accelerometer for measuring an acceleration value. The accelerometer comprises: a first electrode; a second electrode; a third, mobile electrode arranged between the first and second electrodes, and forming with the first electrode a first capacitor with a first capacitance value, and with the second electrode a second capacitor with a second capacitance value, the third electrode being arranged to be displaced when the capacitive accelerometer is subject to acceleration thereby arranged to generate a capacitance difference value between the first and second capacitances transformable to electrical charges; a first voltage source and a second voltage source for selectively applying a first voltage value to the first electrode, a second voltage value to the second electrode and a third voltage value to the third electrode, and arranged to generate electrostatic forces acting on the third electrode. The first, second and/or third voltage values are arranged to be applied during electrical charge transfers for collecting the electrical charges in order to measure the acceleration. The accelerometer comprises electrostatic force compensation means for compensating missing electrostatic forces owing to a modified charge transfer rate, the amount of compensation being dependent on the modified charge transfer rate.

公开(公告)号：US20160003880A1

公开(公告)日：2016-01-07

申请号：US14721129

申请日：2015-05-26

Applicant: EM MICROELECTRONIC-MARIN SA

Inventor： Alexandre DESCHILDRE ,  Sylvain GROSJEAN

IPC: G01R27/02

CPC classification number: G01R27/02 ,  G01C19/5776 ,  G01D5/16 ,  G01L1/22 ,  G01P15/12 ,  G01P15/18

Abstract: The physical parameter measurement method is performed using an electronic circuit (1) with a resistive sensor (2). The resistive sensor includes two resistors (R1, R2) mounted in series, whose connection node connected to a moving mass (M), is connected to a first input of an amplifier-comparator (3). A second input of the amplifier-comparator receives a reference voltage. One output of the amplifier-comparator is connected to a logic unit (4), which provides a digital output signal (OUT). A digital-to-analogue converter (5) provides a measurement voltage (Vdac), as a function of a digital signal provided by the logic unit, to the first resistor (R1) in a first phase of a measurement cycle, whereas the second resistor (R2) is polarized by a polarization voltage, and to the second resistor in a second phase, whereas the first resistor is polarized by a polarization voltage via a switching unit.

Abstract translation: 使用具有电阻式传感器（2）的电子电路（1）进行物理参数测量方法。 电阻式传感器包括串联安装的两个电阻（R1，R2），其连接到移动质量块（M）的连接节点连接到放大器 - 比较器（3）的第一输入端。 放大器 - 比较器的第二输入接收参考电压。 放大器 - 比较器的一个输出端连接到一个提供数字输出信号（OUT）的逻辑单元（4）。 数模转换器（5）在测量周期的第一阶段提供作为由逻辑单元提供的数字信号的函数的测量电压（Vdac）到第一电阻器（R1），而第二 电阻器（R2）由极化电压极化，第二相位与第二电阻器相反，而第一电阻器经由开关单元被极化电压极化。