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21.发明申请公开(公告)号：US20230010056A1
公开(公告)日：2023-01-12
申请号：US17946553
申请日：2022-09-16
Applicant: Silead Inc.
Inventor： Fengyun Yan , Zhanqi Xie , Yungang Sun , Zhenguo Yang , Xiaochi Zhang
Abstract: The present disclosure provides an under-screen optical fingerprint identification apparatus and a fingerprint identification method. The under-screen optical fingerprint identification apparatus comprises: a photodetection array which has a photosensitive area on which a photosensitive pixel array is provided, wherein the photosensitive pixel array comprises at least three types of pixels; and a fingerprint contact identification area located above the photodetection array and comprising a light-emitting layer and a cover layer, wherein the cover layer has a contact area, and the light-emitting layer has an identification area corresponding to the contact area, wherein the identification area comprises light-emitting units, each of which comprises a light-transmitting area and at least three light-emitting areas located therearound for emitting detection light of corresponding wavebands, wherein the detection light is reflected by an object to be identified to form signal light which passes through the filter layers and reaches corresponding three types of pixels.
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公开(公告)号：US10261877B2
公开(公告)日：2019-04-16
申请号：US15239539
申请日：2016-08-17
Applicant: Silead Inc.
Inventor： Wenheng Zhao
IPC: G06F11/00 , G06F11/263 , G06F3/0484 , G06F17/30
Abstract: Systems and methods for testing mobile device s are disclosed. In an embodiment, a mobile device testing system comprises a non-transitory memory and one or more hardware processors coupled to the non-transitory memory. The one or more hardware processors execute instructions to perform operations that include receiving a command XML sheet and rendering the command XML sheet into a user interface application, wherein the command XML sheet comprises elements corresponding to one or more commands for testing a mobile device.
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公开(公告)号：US09542587B2
公开(公告)日：2017-01-10
申请号：US14443342
申请日：2014-04-29
Applicant: SILEAD, INC.
Inventor： Taiyi Cheng , Xianggui Zhao
IPC: G01R27/08 , G06K9/00 , H01L27/092 , H01L27/06 , G01N27/22 , H03K19/003 , G11C29/00
CPC classification number: G06K9/0002 , G01N27/228 , G11C29/785 , H01L27/0629 , H01L27/092 , H01L27/0922 , H01L29/1033 , H03K17/223 , H03K19/00361 , H03K19/00392
Abstract: The present invention relates to a chip design and discloses a fingerprint information detection circuit. The invention includes a reset unit, a feedback unit, an amplification unit and a source follower unit; the reset unit is connected to the feedback unit and amplification unit, while the feedback unit is connected to the amplification unit, and the amplification unit is connected to the source follower unit; when the reset transistor built-into the reset unit is on, it stores an electric charge, and resets the feedback unit; when the reset transistor is off, the stored electric charge is injected into the feedback unit and amplification unit; the feedback unit receives the electric charge, and outputs the second voltage signal generated when it detects fingerprints to the source follower unit; the amplification unit amplifies the received signal and outputs it to the source follower unit; the source follower unit receives the signal, performs voltage level shifting before outputting the first voltage signal that carries the detected fingerprint information. The present invention enables the circuit to use a reduced chip area, hence, saving the cost of the chip.
Abstract translation: 本发明涉及一种芯片设计，并公开了一种指纹信息检测电路。 本发明包括复位单元，反馈单元，放大单元和源极跟随单元; 复位单元连接到反馈单元和放大单元，而反馈单元连接到放大单元，并且放大单元连接到源极跟随单元; 当内置复位单元的复位晶体管导通时，存储电荷，并复位反馈单元; 当复位晶体管截止时，将存储的电荷注入反馈单元和放大单元; 反馈单元接收电荷，并将其检测指纹时产生的第二电压信号输出到源极跟随单元; 放大单元放大接收信号并将其输出到源极跟随器单元; 源极跟随器单元接收信号，在输出携带检测到的指纹信息的第一电压信号之前执行电压电平移位。 本发明使得电路能够使用减小的芯片面积，因此节省了芯片的成本。
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公开(公告)号：US20160275331A1
公开(公告)日：2016-09-22
申请号：US14443342
申请日：2014-04-29
Applicant: SILEAD INC.
Inventor： TAIYI CHENG , XIANGGUI ZHAO
IPC: G06K9/00 , H01L27/06 , G01N27/22 , H01L27/092
CPC classification number: G06K9/0002 , G01N27/228 , G11C29/785 , H01L27/0629 , H01L27/092 , H01L27/0922 , H01L29/1033 , H03K17/223 , H03K19/00361 , H03K19/00392
Abstract: The present invention relates to a chip design and discloses a fingerprint information detection circuit. The invention includes a reset unit, a feedback unit, an amplification unit and a source follower unit; the reset unit is connected to the feedback unit and amplification unit, while the feedback unit is connected to the amplification unit, and the amplification unit is connected to the source follower unit; when the reset transistor built-into the reset unit is on, it stores an electric charge, and resets the feedback unit; when the reset transistor is off, the stored electric charge is injected into the feedback unit and amplification unit; the feedback unit receives the electric charge, and outputs the second voltage signal generated when it detects fingerprints to the source follower unit; the amplification unit amplifies the received signal and outputs it to the source follower unit; the source follower unit receives the signal, performs voltage level shifting before outputting the first voltage signal that carries the detected fingerprint information. The present invention enables the circuit to use a reduced chip area, hence, saving the cost of the chip.
Abstract translation: 本发明涉及一种芯片设计，并公开了一种指纹信息检测电路。 本发明包括复位单元，反馈单元，放大单元和源极跟随单元; 复位单元连接到反馈单元和放大单元，而反馈单元连接到放大单元，并且放大单元连接到源极跟随单元; 当内置复位单元的复位晶体管导通时，存储电荷，并复位反馈单元; 当复位晶体管截止时，将存储的电荷注入反馈单元和放大单元; 反馈单元接收电荷，并将其检测指纹时产生的第二电压信号输出到源极跟随单元; 放大单元放大接收信号并将其输出到源极跟随器单元; 源极跟随器单元接收信号，在输出携带检测到的指纹信息的第一电压信号之前执行电压电平移位。 本发明使得电路能够使用减小的芯片面积，因此节省了芯片的成本。
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公开(公告)号：US20250007533A1
公开(公告)日：2025-01-02
申请号：US18740664
申请日：2024-06-12
Applicant: SILEAD INC.
Inventor： Jinling ZHOU , Jun YANG , Hongzhen CHEN
Abstract: A touch detection circuit, a touch sensing chip and an electronic device are disclosed. The touch detection circuit includes: a charge/discharge circuit, a 1st-order N-bit ΔΣADC comprising an adder, an integrator, an N-bit ADC and an N-bit DAC, the adder comprising two input terminals coupled respectively to an output terminal of the charge/discharge circuit and an output terminal of the N-bit DAC, the N-bit DAC comprising an input terminal coupled to an output terminal of the N-bit ADC, wherein the integrator is configured to integrate net incoming charge that the integrator receives; the N-bit ADC is configured to quantize an output of the integrator into an N-bit digital signal; the N-bit DAC is configured to provide subtractive reference charge according to the instruction of the N-bit digital signal; and the adder is configured to derive the net incoming charge by subtracting the subtractive reference charge from the sense charge.
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Patent Agency Ranking
公开(公告)号：US12184302B2
公开(公告)日：2024-12-31
申请号：US17994803
申请日：2022-11-28
Applicant: SILEAD Inc.
Inventor： Jinling Zhou
Abstract: A data register unit, a SAR ADC and an electronic device are disclosed. The data register unit comprises: a first high-speed flip-flop; a second high-speed flip-flop; and a first logic gate, wherein the first high-speed flip-flop and the second high-speed flip-flop comprise a high-speed flip-flop circuit respectively, which comprises: a first PMOS transistor, a first NMOS transistor, an inverter and a logic gate. The data register unit of the present disclosure is composed of a high-speed flip-flop circuit with a very simple structure and suitable for fast operation. In a further embodiment, the high-speed flip-flop circuit can combine the bit pulse to realize the capacitor switching based on the comparison result. This increases the operation speed of the SAR ADC while significantly reducing the number of transistors required to implement the EMCS logic.
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27.发明公开公开(公告)号：US20240331438A1
公开(公告)日：2024-10-03
申请号：US18619981
申请日：2024-03-28
Applicant: SILEAD Inc.
Inventor： Jinling Zhou , Jun Yang , Wei Su
IPC: G06V40/13
CPC classification number: G06V40/1306
Abstract: The present disclosure provides a method for controlling a fingerprint identification circuit. The method is used for detecting fingerprint recognition units arranged in an array. A fingerprint recognition unit is connected to a fingerprint recognition circuit. The fingerprint recognition circuit includes a loop selection unit and a signal processing unit. The method includes: resetting the fingerprint recognition circuit to enable the loop selection unit to load a first driving voltage to a sensing electrode; and, controlling a state of the loop selection unit through a sequence signal control to enable the fingerprint recognition units arranged in an array to be in different working states.
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公开(公告)号：US12052028B2
公开(公告)日：2024-07-30
申请号：US17844413
申请日：2022-06-20
Applicant: SILEAD Inc.
Inventor： Jinling Zhou
CPC classification number: H03M1/462 , H03K19/1774 , H03K19/20 , H03M1/206 , H03M1/361
Abstract: A SAR ADC and an electronic device are disclosed. The SAR ADC includes a read clock generation circuit, configured to connect to a first output terminal and a second output terminal of a dynamic comparator, and generate a read clock signal for reading a first or a second comparison result based on the first and the second comparison result received from the dynamic comparator. The invention reads the comparison result using the read clock signal generated by grabbing the output of the comparator, and can improve the overall analog-to-digital conversion speed of the SAR ADC. Further, the present invention can detect the occurrence of metastable state of the comparator by judging that the output of the comparator has no pulse, and read the comparison result based on the backup clock generated by the operating clock of the comparator.
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公开(公告)号：US20240012501A1
公开(公告)日：2024-01-11
申请号：US18148239
申请日：2022-12-29
Applicant: SILEAD INC.
Inventor： Jingze HUANG
CPC classification number: G06F3/0412 , G06F3/0445
Abstract: A charge source circuit, an analog-to-digital converter (ADC) and an organic light-emitting diode (OLED) touch panel are disclosed. The charge source circuit includes a reference current generation block, a current mirror block and a charge output block. The charge output block is configured to provide an amount of charge as current times time, rather than voltage times capacitance as conventionally done. This dispenses with the use of a voltage division technique, a drive operational amplifier or a great number of capacitors, resulting in circuit simplicity, reduced cost and circuit layout area savings. Moreover, current and time interval sequences can be designed to enable, with a very small area and voltage, continuous adjustability of the amount of charge within a desired range at a higher resolution. An equivalent capacitance corresponding to the amount of charge can be adjusted within a range from tens to hundreds of pF.
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公开(公告)号：US20230064181A1
公开(公告)日：2023-03-02
申请号：US17411531
申请日：2021-08-25
Applicant: Silead Inc.
IPC: H01L27/146 , H01L27/148 , H04N5/355 , H04N5/3745
Abstract: An image sensor includes an image sensor pixel array having pixels. Each pixel includes a continuous active region having a first portion and a second portion extending from the first portion. A photodiode, a reset transistor, a drive transistor, and a select transistor are formed in and over the first portion. The photodiode and the reset transistor define a floating diffusion region therebetween. A switch transistor is formed in and over the second portion and includes a first source/drain region and a second source/drain region. The first source/drain region is included in the floating diffusion region. The second source/drain region interfaces a doped region formed in the second region. The pixel also includes a gate structure disposed directly over the doped region. By controlling the switch transistor, the pixel may operate in a high conversion gain mode or a low conversion gain mode to accommodate different illumination or exposure conditions.
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