-
公开(公告)号：US20230316802A1
公开(公告)日：2023-10-05
申请号：US17992590
申请日：2022-11-22
Applicant: Silead Inc.
CPC classification number: G06V40/1365 , G06V10/26 , G06V40/1306
Abstract: The embodiments of the present disclosure provide a fingerprint detection method and a fingerprint module. The fingerprint detection method includes: dividing a detection area of the fingerprint module into a plurality of detection blocks, wherein each of the detection blocks comprises a plurality of detection units, and each of the detection units is corresponding to a grayscale value; scanning at least part of the detection blocks to obtain the grayscale values; determining whether each of the detection blocks is in a covered state based on the grayscale values; and counting the number of the detection blocks in the covered state, and sending a collection request to a host to inform the host to obtain a fingerprint image if the number thereof is not less than a coverage block threshold. The method avoids meaningless detection caused by a false touch, and ensures integrity of the fingerprint image collected later.
-
公开(公告)号：US20230291415A1
公开(公告)日：2023-09-14
申请号：US17994803
申请日：2022-11-28
Applicant: SILEAD Inc.
Inventor： Jinling Zhou
IPC: H03M1/46
CPC classification number: H03M1/466
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 third 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.
-
公开(公告)号：US20230208431A1
公开(公告)日：2023-06-29
申请号：US17844413
申请日：2022-06-20
Applicant: SILEAD Inc.
Inventor： Jinling Zhou
IPC: H03M1/46 , H03M1/20 , H03M1/36 , H03K19/17736 , H03K19/20
CPC classification number: H03M1/462 , H03M1/206 , H03M1/361 , H03K19/1774 , H03K19/20
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.
-
公开(公告)号：US20220329044A1
公开(公告)日：2022-10-13
申请号：US17533578
申请日：2021-11-23
Applicant: SILEAD Inc.
Inventor： Shujuan Li , Yongsheng Hou , Zhanqi Xie
Abstract: Provided are a vertical-cavity surface-emitting laser, a manufacturing method, a distance measuring device, and an electronic device. The vertical-cavity surface-emitting laser includes a lower electrode, a substrate, a lower Bragg reflector, an active area, a current limiting layer, an upper Bragg reflector, a protective layer, and an upper electrode. The upper electrode includes at least two sub-electrodes, the at least two sub-electrodes are electrically connected, and the at least two sub-electrodes define one or more light-exiting windows. Each sub-electrode is provided with a corresponding light-exiting window so that the luminous power is increased. Each sub-electrode defines the light-exiting window, and a plurality of sub-electrodes are electrically connected so that the distribution uniformity of the light spots is increased, and the quality of the laser beam is improved.
-
公开(公告)号：US20170098111A1
公开(公告)日：2017-04-06
申请号：US15384041
申请日：2016-12-19
Applicant: SILEAD, INC.
Inventor： TAIYI CHENG , XIANGGUI ZHAO
IPC: G06K9/00 , H01L27/092 , H03K17/22 , H01L27/06
CPC classification number: G06K9/0002 , G01N27/228 , G11C29/785 , H01L27/0629 , H01L27/092 , H01L27/0922 , H01L29/1033 , H03K17/223 , H03K19/00361 , H03K19/00392
Abstract: A fingerprint information detection circuit comprises an amplification unit, a source follower unit, a reset unit, and a feedback unit. The amplification unit is coupled to the source follower unit. The reset unit is coupled to both the feedback unit and the amplification unit. The feedback unit and the amplification unit are coupled. The reset unit includes a first transistor and a reset transistor, wherein source and drain electrodes of the first transistor are coupled, wherein one of source and drain electrodes of the reset transistor is coupled to the source and drain electrodes of the first transistor.
-
Patent Agency Ranking
公开(公告)号：US20250015811A1
公开(公告)日：2025-01-09
申请号：US18746765
申请日：2024-06-18
Applicant: SILEAD INC..
Inventor： Jinling ZHOU , Xianyin YU , Chenjun WENG
Abstract: An analog-to-digital converter, a touch sensing chip and an electronic device are disclosed. The ADC includes a digital-to-analog conversion circuit, a comparator, a successive approximation register logic circuit and a residue sampling and summing circuit, the successive approximation register logic circuit coupled to output terminal of the comparator and control terminal of the digital-to-analog conversion circuit, the successive approximation register logic circuit configured to produce a corresponding quantized digital signal each time, based on the result of comparison from the comparator, the residue sampling and summing circuit configured to obtain a corresponding residue each time, by sampling residual voltage output from digital-to-analog conversion circuit, sum previous sampled residue and common reference voltage and provide the sum to the comparator, the comparator configured to compare a current output of the residue sampling and summing circuit with a current output of the digital-to-analog conversion circuit and thereby obtain current result of comparison.
-
公开(公告)号：US11861093B1
公开(公告)日：2024-01-02
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.
-
公开(公告)号：US11675458B2
公开(公告)日：2023-06-13
申请号：US17724613
申请日：2022-04-20
Applicant: SILEAD INC.
Inventor： Wukang Zhang , Weiguo Li , Jun Yang
CPC classification number: G06F3/0418 , G06F3/0446
Abstract: The present invention relates to a touch detection device, an electronic apparatus and a touch detection method. Each frame of touch related data corresponding to n*m capacitive nodes is obtained by producing n*m coupled signals from encoding operations and subjecting the n*m coupled signals to multiple access accumulation process, common mode suppression process, ADC process and decoding processes. Additionally, touch location information of the n*m capacitive nodes is obtained by acquiring two consecutive frames of touch related data and performing a subtraction operation between the two consecutive frames of touch related data. Therefore, relatively high touch sensing sensitivity is achievable. Before the subtraction operation, common-mode analog voltage amounts subtracted in the common mode suppression process may be not added back for each single frame of touch related data obtained from decoding process. This avoids introduction of errors, as well as a larger circuitry area and increased power consumption.
-
公开(公告)号：US11658201B2
公开(公告)日：2023-05-23
申请号：US17411531
申请日：2021-08-25
Applicant: Silead Inc.
IPC: H04N5/355 , H01L27/146 , H04N5/3745 , H01L27/148
CPC classification number: H01L27/14643 , H01L27/14603 , H01L27/14612 , H01L27/14831 , H04N5/3559 , 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.
-
公开(公告)号：US20230138208A1
公开(公告)日：2023-05-04
申请号：US17724613
申请日：2022-04-20
Applicant: SILEAD INC.
Inventor： Wukang ZHANG , Weiguo LI , Jun YANG
Abstract: The present invention relates to a touch detection device, an electronic apparatus and a touch detection method. Each frame of touch related data corresponding to n*m capacitive nodes is obtained by producing n*m coupled signals from encoding operations and subjecting the n*m coupled signals to multiple access accumulation process, common mode suppression process, ADC process and decoding processes. Additionally, touch location information of the n*m capacitive nodes is obtained by acquiring two consecutive frames of touch related data and performing a subtraction operation between the two consecutive frames of touch related data. Therefore, relatively high touch sensing sensitivity is achievable. Before the subtraction operation, common-mode analog voltage amounts subtracted in the common mode suppression process may be not added back for each single frame of touch related data obtained from decoding process. This avoids introduction of errors, as well as a larger circuitry area and increased power consumption.
-
-
-
-
-
-
-
-
-
Search Results
33
records
(took 0.048 seconds)
