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Patent Agency Ranking
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.
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公开(公告)号：US11460962B1
公开(公告)日：2022-10-04
申请号：US17518708
申请日：2021-11-04
Applicant: SILEAD INC.
Inventor： Wukang Zhang , Jun Yang
Abstract: A touch detection method, a touch control chip and a touch control display device are disclosed. In the touch detection method, coded data is loaded in drive channels and collected from sense channels. The collected data is decoded and subjected to differential processes. This results in a reduced common-mode signal, interference and noise. A touch response detection is carried out to choose at least one sense channel without touch response from sense channels as reference channel. This dynamically chosen reference channel reduces the risk of inaccurate touch location inference caused by abnormalities of static dummy reference channel and helps improve touch location detection accuracy, sense channels close to ends of capacitive touch control device are allowed to participate in touch response detection as other sense channels do, resulting in an expanded touch control range. The touch control chip and touch control display device all have similar advantages.
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公开(公告)号：US11861935B2
公开(公告)日：2024-01-02
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.
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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.
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5.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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