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公开(公告)号：US09696737B2
公开(公告)日：2017-07-04
申请号：US14739259
申请日：2015-06-15
Applicant: PIXART IMAGING INC.
Inventor： Han-Chi Liu
CPC classification number: G05F1/56 , H02H9/025 , H02M2003/1566
Abstract: A surge current compensating circuit has a compensating current generation unit and a bias unit, for compensating a surge current drawn from a supply power after an output signal of a specific circuit transits. The compensating current generation unit electrically coupled to the output stage of the specific circuit draws a compensating current form the supply power according to the output signal. The compensating current substantially equals to the surge current, and a summation of a current flowing through the output stage of the specific circuit and the compensating current is substantially unchanged regardless whether the output signal transits or not. The bias unit electrically coupled to the compensating current generation unit provides a bias to the compensating current generation unit to receive the compensating current passed through the compensating current generation unit or output the compensating current to the compensating current generation unit.
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公开(公告)号：US11792550B2
公开(公告)日：2023-10-17
申请号：US18071477
申请日：2022-11-29
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.
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公开(公告)号：US11783633B2
公开(公告)日：2023-10-10
申请号：US17333022
申请日：2021-05-28
Applicant: PIXART IMAGING INC.
Inventor： Ren-Chieh Liu , Yi-Hsien Ko , Han-Chi Liu
Abstract: There is provided an optical sensor including a pixel matrix and a readout circuit. The pixel matrix includes multiple pixels arranged in a matrix, and each of the multiple pixels outputs temporal difference pixel data. The readout circuit sequentially reads the pixel matrix using a readout block, and performs the hybrid difference calculation on the temporal difference pixel data of pixels within the readout block. Accordingly, the output of the readout circuit is the data accomplishing temporal difference and spatial difference.
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公开(公告)号：US11614359B2
公开(公告)日：2023-03-28
申请号：US17474738
申请日：2021-09-14
Applicant: PixArt Imaging Inc.
Inventor： Kuan Tang , Yi-Cheng Chiu , Chia-Chi Kuo , Jui-Te Chiu , Han-Chi Liu
Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
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公开(公告)号：US11592330B2
公开(公告)日：2023-02-28
申请号：US17474770
申请日：2021-09-14
Applicant: PixArt Imaging Inc.
Inventor： Kuan Tang , Yi-Cheng Chiu , Chia-Chi Kuo , Jui-Te Chiu , Han-Chi Liu
Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
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Patent Agency Ranking
公开(公告)号：US11055548B1
公开(公告)日：2021-07-06
申请号：US16893936
申请日：2020-06-05
Applicant: PixArt Imaging Inc.
Inventor： Ren-Chieh Liu , Yi-Hsien Ko , Han-Chi Liu
Abstract: There is provided an optical sensor including a pixel matrix and a readout circuit. The pixel matrix includes multiple pixels arranged in a matrix, and each of the multiple pixels outputs temporal difference pixel data. The readout circuit sequentially reads the pixel matrix using a readout block, and performs the hybrid difference calculation on the temporal difference pixel data of pixels within the readout block. Accordingly, the output of the readout circuit is the data accomplishing temporal difference and spatial difference.
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公开(公告)号：US11012653B2
公开(公告)日：2021-05-18
申请号：US16601541
申请日：2019-10-14
Applicant: PixArt Imaging Inc.
Inventor： Chia-Chi Kuo , Jui-Te Chiu , Han-Chi Liu , Wei-Chia Huang , Yi-Cheng Chiu , Kuan Tang
IPC: H04N5/376 , H04N5/372 , H04N5/3745
Abstract: A method of image sensor apparatus includes: providing pixel array having pixel units arranged in M rows and N columns; providing N parallel column readout circuits each being arranged for reading out pixel data of one corresponding column; disposing a horizontal shift register in row direction coupled to the N parallel column readout circuits, to receive a pulse signal and a clock signal, sequentially shift a phase of the pulse signal according to the clock signal, and scan a corresponding column according to the shifted phase of the pulse signal; and using a column select circuit having N latches to receive a power down digital control signal transmitted from a microcontroller wherein the power down digital control signal is used to disable at least one column readout circuit to enable and select a portion of the set of N parallel column readout circuits.
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公开(公告)号：US20210112215A1
公开(公告)日：2021-04-15
申请号：US16601541
申请日：2019-10-14
Applicant: PixArt Imaging Inc.
Inventor： Chia-Chi Kuo , Jui-Te Chiu , Han-Chi Liu , Wei-Chia Huang , Yi-Cheng Chiu , Kuan Tang
IPC: H04N5/376 , H04N5/3745 , H04N5/372
Abstract: A method of image sensor apparatus includes: providing pixel array having pixel units arranged in M rows and N columns; providing N parallel column readout circuits each being arranged for reading out pixel data of one corresponding column; disposing a horizontal shift register in row direction coupled to the N parallel column readout circuits, to receive a pulse signal and a clock signal, sequentially shift a phase of the pulse signal according to the clock signal, and scan a corresponding column according to the shifted phase of the pulse signal; and using a column select circuit having N latches to receive a power down digital control signal transmitted from a microcontroller wherein the power down digital control signal is used to disable at least one column readout circuit to enable and select a portion of the set of N parallel column readout circuits.
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19.发明申请公开(公告)号：US20180309943A1
公开(公告)日：2018-10-25
申请号：US16023097
申请日：2018-06-29
Applicant: PixArt Imaging Inc.
Inventor： CHIEN-JUNG CHOU , Han-Chi Liu , Wen-Cheng Yen
Abstract: A digital imaging device including a sensor array, an analog front end and a digital back end. The sensor array is configured to output black pixel data and normal pixel data. The analog front end is configured to amplify the black pixel data and the normal pixel data with a gain, and calibrate the amplified black pixel data and the amplified normal pixel data with a calibration value. The digital back end is configured to digitize the amplified and calibrated black pixel data, calculate a data offset according to digital black pixel data, determine a dynamic adjust scale, calculate the calibration value according to the gain, the data offset and the dynamic adjust scale, and adjust the gain according to the dynamic adjust scale.
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公开(公告)号：US20180240837A1
公开(公告)日：2018-08-23
申请号：US15697421
申请日：2017-09-06
Applicant: PixArt Imaging Inc.
Inventor： Peng-Sheng Chen , Jui-Te Chiu , Han-Chi Liu
IPC: H01L27/146 , H04N3/14
CPC classification number: H01L27/14643 , H01L27/14612 , H04N3/155
Abstract: A sensing pixel array used in an image sensor includes sensing pixel units each including a photodiode, a row reset transistor, a buffer transistor, and a column control transistor at least. Photodiode converts light into a sensing signal. Row reset transistor is coupled to a reference reset signal and photodiode, and is controlled by a row reset signal. Buffer transistor is coupled to the output of photodiode to receive and buffer the sensing signal. Column control transistor is electrically connected to the control end or the output of the buffer transistor and is used as a switch which can be closed or open according to a column control signal to control whether to transfer charge of the reference reset signal to a capacitor when the row reset transistor becomes conductive.
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