中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

3435 records (took 0.039 seconds)

    IMAGE SENSOR WITH CONTROLLED SPAD AVALANCHE
    111.
    发明公开
    IMAGE SENSOR WITH CONTROLLED SPAD AVALANCHE 审中-公开

    公开(公告)号：US20240314465A1

    公开(公告)日：2024-09-19

    申请号：US18677949

    申请日：2024-05-30

    Applicant: PixArt Imaging Inc.

    Inventor： TSO-SHENG TSAI

    IPC: H04N25/75 ,  H01L27/146 ,  H01L31/107 ,  H04N25/76

    CPC classification number: H04N25/75 ,  H01L27/14612 ,  H01L27/14643 ,  H04N25/76 ,  H01L31/107

    Abstract: There is provided an image sensor employing an avalanche diode. The image sensor includes a plurality of pixel circuits arranged in a matrix, a plurality of pulling circuits and a global current source circuit. Each of the plurality of pixel circuits includes a single photon avalanche diode (SPAD) and a floating diffusion. Each of the plurality of pulling circuits is arranged corresponding to one pixel circuit column. The global current source circuit is used to form a current mirror with each of the plurality of pulling circuits. The floating diffusion is used to record a voltage of one photon event detected by the SPAD in an exposure period.

    Avalanche diode based detection device
    113.
    发明授权
    Avalanche diode based detection device 有权

    公开(公告)号：US12085677B2

    公开(公告)日：2024-09-10

    申请号：US17735547

    申请日：2022-05-03

    Applicant: PixArt Imaging Inc.

    Inventor： Tso-Sheng Tsai

    IPC: G01S7/487 ,  G01S7/4865 ,  G01S17/04

    CPC classification number: G01S7/487 ,  G01S7/4865 ,  G01S17/04

    Abstract: There is provided a detection device including a light source, an avalanche diode, a first counter, a second counter and a processor. The light source emits light within a first interval, and is turned off within a second interval, a third interval and a fourth interval. The avalanche diode detects photons corresponding to the first interval, second, third and fourth intervals to trigger avalanche events. The first counter performs up-counting on the avalanche events in the first interval and performs down-counting on the avalanche events in the third interval to generate a first count value. The second counter performs up-counting on the avalanche events in the second interval and performs down-counting on the avalanche events in the fourth interval to generate a second count value. The processor calculates a time-of-flight according to the first count value and the second count value.

    Pixel circuit outputting pulse width signal and optical sensor using the same
    116.
    发明授权
    Pixel circuit outputting pulse width signal and optical sensor using the same 有权

    公开(公告)号：US12058467B2

    公开(公告)日：2024-08-06

    申请号：US18244296

    申请日：2023-09-11

    Applicant: PixArt Imaging Inc.

    Inventor： Ren-Chieh Liu ,  Chih-Huan Wu ,  Yi-Hsien Ko ,  Han-Chi Liu

    IPC: H04N25/772 ,  H01L27/146

    CPC classification number: H04N25/772 ,  H01L27/14643

    Abstract: There is provided a pixel circuit for performing analog operation including a photodiode, a first temporal circuit, a second temporal circuit and an operation circuit. Within a first interval, the photodiode detects first light energy to be stored in the first temporal circuit. Within a second interval, the photodiode detects second light energy to be stored in the second temporal circuit. Within an operation interval, the first temporal circuit outputs a first detection signal having a first pulse width according to the first light energy and outputs a second detection signal having a second pulse width according to the second light energy for being calculated by the operation circuit.

    Optical sensor which can reduce image flicker
    119.
    发明授权
    Optical sensor which can reduce image flicker 有权

    公开(公告)号：US12047687B2

    公开(公告)日：2024-07-23

    申请号：US17889366

    申请日：2022-08-16

    Applicant: PixArt Imaging Inc.

    Inventor： Chih-Huan Wu

    IPC: H04N23/745 ,  H04N23/73 ,  H04N23/743 ,  H04N25/583 ,  H04N25/75

    CPC classification number: H04N23/745 ,  H04N23/73 ,  H04N23/743 ,  H04N25/583 ,  H04N25/75

    Abstract: An optical sensor, for sensing a sensing frame corresponding to a flicker period of ambient light, comprising: a pixel array, configured to perform N times of exposure operations via at least one pixel of the pixel array in N exposure time intervals to generate N sub-frames, wherein a summation of the N exposure time intervals equals to a sensing interval and the sensing interval is less than or identical to a first flicker period. The optical sensor adds the N sub-frames to generate a summing sub-frame. The sensing frame comprises the summing sub-frame. The adding operation can also be performed to digital signals generated from the sub-frames. The influences caused by the fluctuation of ambient light can be neutralized, since the frame or portion of the frame is sensed at least twice at different phases of a single flicked period. By this way, the conventional flicker issue can be improved.

    Smoke detection device with preferred detection accuracy
    120.
    发明授权
    Smoke detection device with preferred detection accuracy 有权

    公开(公告)号：US12046114B2

    公开(公告)日：2024-07-23

    申请号：US17741459

    申请日：2022-05-11

    Applicant: PixArt Imaging Inc.

    Inventor： Yen-Chang Chu ,  Yen-Po Chen ,  Chih-Ming Sun ,  Cheng-Nan Tsai ,  Ching-Kun Chen

    IPC: G08B17/10 ,  G08B17/107

    CPC classification number: G08B17/107

    Abstract: A smoke detection device includes a housing, a smoke collector, an optical detector and a cover plate. The housing has a piercing hole. The smoker collector has a smoke hole, and position of the smoke hole is close to position of the piercing hole. The optical detector is disposed inside the smoke collector and adapted to detect gaseous concentration inside the smoke collector. The cover plate is disposed between the housing and the smoke collector, and used to set a channel from the piercing hole to the smoke hole, so that gaseous matter flows from outside the smoke detection device into the smoke collector through the piercing hole and the smoke hole.

Patent Agency Ranking