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No. Publication Number Title Publication/Patent Number Publication/Patent Number Publication Date Publication Date
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1 US2020137337A1
SENSOR PIXEL AND IMAGE SENSORS COMPRISING THE SAME
Publication/Patent Number: US2020137337A1 Publication Date: 2020-04-30 Application Number: 16/600,640 Filing Date: 2019-10-14 Inventor: Jin, Jong Woo   Yu, Jinhyeong   Hong, Sung Soo   Park, Young Man   Go, Taehan   Choi, Soon Ho   Nam, Youn Duck   Assignee: Silicon Display Technology   IPC: H04N5/378 Abstract: The present invention relates to a sensor pixel including: a first transistor for a light sensing; a second transistor including one terminal connected to one terminal of the first transistor and the other terminal to which a reset voltage is transmitted; a third transistor including a gate connected to one terminal of the first transistor and one terminal connected to the other terminal of the first transistor; and a fourth transistor connected between the other terminal of the third transistor and a data line.
2 US10755070B2
Sensor pixel, fingerprint and image sensor including the same, and driving method thereof
Publication/Patent Number: US10755070B2 Publication Date: 2020-08-25 Application Number: 16/214,296 Filing Date: 2018-12-10 Inventor: Kim, Kijoong   Go, Taehan   Yu, Jin Hyeong   Hur, Ji Ho   Jin, Jong Woo   Park, Young Man   Nam, Youn Duck   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: G11C7/00 Abstract: A fingerprint and image sensor includes a plurality of data lines, a plurality of scan lines, to which a plurality of scan signals is transferred, a plurality of reset scan lines, to which a plurality of reset scan signals is transferred, and a sensor panel, which is reset by a reset voltage, which is synchronized to a corresponding reset scan signal and is transferred, generates a pixel voltage according to light supplied during an exposure period, and includes a plurality of sensor pixels, which is synchronized to a corresponding scan signal and transfers the pixel voltage to a corresponding data line, and the exposure period may be a period from a time point, at which the corresponding reset scan signal is changed to an off-level, to a time point, at which the corresponding scan signal is changed to an on-level.
3 US2020160024A1
SMART CARD
Publication/Patent Number: US2020160024A1 Publication Date: 2020-05-21 Application Number: 16/669,739 Filing Date: 2019-10-31 Inventor: Jin, Jong Woo   Go, Taehan   Nam, Youn Duck   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: G06K9/00 Abstract: A smart card according to an exemplary embodiment of the present invention includes: a transparent substrate including a side contacting a finger of a user; a reflection layer separated from the transparent substrate, facing the transparent substrate, and including a metal material; a photosensor provided between the transparent substrate and the reflection layer, and sensing light reflected and input from the reflection layer; and a card substrate including an opaque material and covering the reflection layer.
4 US2020012833A1
FINGERPRINT RECOGNITION SENSOR AND DISPLAY DEVICE HAVING THE SAME
Publication/Patent Number: US2020012833A1 Publication Date: 2020-01-09 Application Number: 16/503,863 Filing Date: 2019-07-05 Inventor: Jin, Jong Woo   Yu, Jin Hyeong   Jin, Hyunwoo   Chung, Jun Woo   Nam, Youn Duck   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: G06K9/00 Abstract: A fingerprint recognition sensor according to an exemplary embodiment of the present invention includes: a photo sensor for sensing light that is diffuse-reflected from a finger of a user and incident on the photo sensor, or that is transmitted through the finger and incident on the photo sensor; a first matrix positioned on the photo sensor and including a first opening; a second matrix positioned on the first matrix and including a second opening; and a cover layer including one surface contacting the finger and positioned on the second matrix, wherein, from among light that is diffuse-reflected from the finger and incident on the cover layer or that is transmitted through the finger and incident on the cover layer, light having an angle, formed by a normal line on the one surface of the cover layer and a path of the light incident on the cover layer, that is greater than a critical angle, sequentially passes through the second opening and the first opening and is incident on the photo sensor.
5 US202012833A1
FINGERPRINT RECOGNITION SENSOR AND DISPLAY DEVICE HAVING THE SAME
Publication/Patent Number: US202012833A1 Publication Date: 2020-01-09 Application Number: 20/191,650 Filing Date: 2019-07-05 Inventor: Jin, Jong Woo   Yu, Jin Hyeong   Nam, Youn Duck   Jin, Hyunwoo   Chung, Jun Woo   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: G06K9/00 Abstract: A fingerprint recognition sensor according to an exemplary embodiment of the present invention includes: a photo sensor for sensing light that is diffuse-reflected from a finger of a user and incident on the photo sensor, or that is transmitted through the finger and incident on the photo sensor; a first matrix positioned on the photo sensor and including a first opening; a second matrix positioned on the first matrix and including a second opening; and a cover layer including one surface contacting the finger and positioned on the second matrix, wherein, from among light that is diffuse-reflected from the finger and incident on the cover layer or that is transmitted through the finger and incident on the cover layer, light having an angle, formed by a normal line on the one surface of the cover layer and a path of the light incident on the cover layer, that is greater than a critical angle, sequentially passes through the second opening and the first opening and is incident on the photo sensor.
6 US2019180075A1
SENSOR PIXEL, FINGERPRINT AND IMAGE SENSOR INCLUDING THE SAME, AND DRIVING METHOD THEREOF
Publication/Patent Number: US2019180075A1 Publication Date: 2019-06-13 Application Number: 16/214,296 Filing Date: 2018-12-10 Inventor: Kim, Kijoong   Go, Taehan   Yu, Jin Hyeong   Hur, Ji Ho   Jin, Jong Woo   Park, Young Man   Nam, Youn Duck   Assignee: Silicon Display Technology   IPC: G06K9/00 Abstract: A fingerprint and image sensor includes a plurality of data lines, a plurality of scan lines, to which a plurality of scan signals is transferred, a plurality of reset scan lines, to which a plurality of reset scan signals is transferred, and a sensor panel, which is reset by a reset voltage, which is synchronized to a corresponding reset scan signal and is transferred, generates a pixel voltage according to light supplied during an exposure period, and includes a plurality of sensor pixels, which is synchronized to a corresponding scan signal and transfers the pixel voltage to a corresponding data line, and the exposure period may be a period from a time point, at which the corresponding reset scan signal is changed to an off-level, to a time point, at which the corresponding scan signal is changed to an on-level.
7 US10217399B2
Level shifter and array apparatus
Publication/Patent Number: US10217399B2 Publication Date: 2019-02-26 Application Number: 15/623,577 Filing Date: 2017-06-15 Inventor: Kim, Kijoong   Park, Young Man   Hur, Ji Ho   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: G09G3/20 Abstract: The present invention relates to a level shifter including: a first inverter applied with a first voltage and a second voltage of different polarities and operated depending on an input voltage to output a first inverting output signal; a second inverter applied with the first voltage and the second voltage and operated depending on the first inverting output signal to output a second inverting output signal having an opposite polarity to that of the first inverting output signal; a driver applied with a third voltage and a fourth voltage, including a first load transistor having the first inverting output signal as a gate input and a second load transistor having a fifth voltage as the gate input, and outputting an output voltage having an increased level with respect to the input voltage; and a bootstrap capacitor positioned between an output terminal of the second inverter and a gate electrode of the second load transistor to help the fifth voltage to be bootstrapped depending on the second inverting output signal, and an array apparatus including the same.
8 KR101944059B1
Sensor pixel operating in optical mode and capacitive mode and image sensors comprising the same
Publication/Patent Number: KR101944059B1 Publication Date: 2019-01-30 Application Number: 20180045641 Filing Date: 2018-04-19 Inventor: Kim, Ki Joong   Yu, Jin Hyeong   Park, Young Man   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: H01L27/146 Abstract: A sensor pixel includes: a first transistor controlled in accordance with a mode selection voltage supplied at one end; a second transistor including a gate connected to the other end of the first transistor; and a photoconductor connected to one end of the second transistor. When the first transistor is on, the sensor pixel operates in an optical mode, and when the first transistor is off, the sensor pixel operates in a capacitive manner. It is possible to recognize fingerprints and documents by selecting one of the optical mode and the capacitive mode on an image sensor.
9 KR101948870B1
FINGERPRINT RECOGNITION SENSOR AND DISPLAY DEVICE HAVING THE SAME
Publication/Patent Number: KR101948870B1 Publication Date: 2019-02-15 Application Number: 20180079276 Filing Date: 2018-07-09 Inventor: Yu, Jin Hyeong   Jin, Hyun Woo   Nam, Youn Duck   Jin, Jong Woo   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: G02F1/1333 Abstract: According to an embodiment of the present invention, a fingerprint recognition sensor comprises: a photosensor for detecting scattered light reflected from a finger of a user or transmitted through a finger; a first matrix positioned on the photosensor and including a first aperture; a second matrix located on the first matrix and including a second aperture; one side which is in contact with a finger; and a cover layer for covering the second matrix, wherein, among scattered light reflected from the finger or light transmitted through the finger and incident on the cover layer, a light having an angle greater than a critical angle formed by the normal to the one surface of the cover layer and the path of the light incident on the cover layer sequentially passes through the second aperture and the first aperture and is incident on the photosensor.
10 KR20190059672A
CAPACITIVE FINGERPRINT RECOGNITION SENSOR AND MANUFACTURING METHOD FOR THE SAME
Publication/Patent Number: KR20190059672A Publication Date: 2019-05-31 Application Number: 20170157517 Filing Date: 2017-11-23 Inventor: Kim, Jae Min   Kim, Ki Joong   Hur, Ji Ho   Jin, Jong Woo   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: H01L27/12 Abstract: According to an embodiment of the present invention, a method for manufacturing a capacitive fingerprint recognition sensor is to improve reliability against scratches, shocks, and static electricity which occur from the outside. According to an embodiment of the present invention, a method for manufacturing a capacitive fingerprint recognition sensor comprises the following steps: sequentially forming a thin film transistor and a pixel electrode on a lower plate; forming a planarization film on the pixel electrode; forming two or more coupling electrodes on an upper plate; forming an adhesive between the two or more coupling electrodes on the upper plate; and attaching the lower late and the upper plate.
11 US10210373B2
Fingerprint recognition sensor capable of sensing fingerprint using optical and capacitive method
Publication/Patent Number: US10210373B2 Publication Date: 2019-02-19 Application Number: 14/904,932 Filing Date: 2013-10-31 Inventor: Kim, Ki Joong   Hur, Ji Ho   Hong, Bong Yeob   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: G06K9/00 Abstract: Provided is a fingerprint recognition sensor capable of sensing a fingerprint using optical and capacitive methods, the sensor including: a capacitive fingerprint sensing unit that includes a transistor (T2) in which a flowing current is changed depending on an output voltage of a fingerprint sensing electrode capable of sensing the humans fingerprint; and an optical fingerprint sensing unit which changes the flowing current in the transistor (T2) due to a difference in reverse current of a photodiode generated by light and shade depending on existence or non-existence of the fingerprint.
12 US10424672B2
Oxide semiconductor transistor
Publication/Patent Number: US10424672B2 Publication Date: 2019-09-24 Application Number: 15/435,372 Filing Date: 2017-02-17 Inventor: Lee, Suhui   Moon, Sung-ryong   Kim, Jaemin   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: H01L29/786 Abstract: An oxide semiconductor transistor according to an exemplary embodiment of the present invention includes: a substrate; a first gate electrode disposed on the substrate; a gate insulating layer disposed on the substrate and the first gate electrode; an oxide semiconductor layer disposed on the gate insulating layer; an etch stopper layer disposed on the oxide semiconductor layer; and a source electrode and a drain electrode disposed on the oxide semiconductor layer and the etch stopper layer and spaced apart from each other.
13 KR101966916B1
SENSOR PIXEL FINGERPRINT AND IMAGE SENSOR AND DRIVING METHOD THEREOF
Publication/Patent Number: KR101966916B1 Publication Date: 2019-04-08 Application Number: 20170170662 Filing Date: 2017-12-12 Inventor: Kim, Ki Joong   Yoo, Jin Hyeong   Go, Tae Han   Hur, Ji Ho   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: H04N5/3745 Abstract: Provided are a sensor pixel with limitless driving speed, a fingerprint and image sensor having the same, and a driving method thereof. To this end, the fingerprint and image sensor comprises: a plurality of data lines extended in a first direction and arranged in a second direction; a reset voltage generation circuit for generating a reset voltage according to the amount of external light; a sensor panel including a plurality of sensor pixels reset by the reset voltage and generating a pixel voltage according to supplied light; and a sensing reading circuit receiving the pixel voltage through a corresponding data line among the plurality of data lines and generating an output voltage based on the pixel voltage and a reference voltage.
14 US10354115B2
Capacitive fingerprint sensor
Publication/Patent Number: US10354115B2 Publication Date: 2019-07-16 Application Number: 15/560,191 Filing Date: 2016-04-07 Inventor: Kim, Ki Joong   Yoo, Jin Hyeong   Hong, Bong Yeob   Kim, Yong Kuk   Hur, Ji Ho   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: G06K9/00 Abstract: The present invention relates to a capacitive fingerprint sensor, and the capacitive fingerprint sensor includes: a fingerprint sensor electrode for sensing a fingerprint of a human body; a first transistor of which a current or an output voltage is changed according to a voltage change of capacitive coupling formed by fingerprint capacitance formed when a fingerprint contacts the fingerprint sensor electrode and coupling capacitance formed for capacitive coupling; a fifth transistor that resets a gate electrode of the first transistor and applies capacitive coupling to the gate electrode of the first transistor through a coupling pulse; a second transistor of which a current or an output voltage is changed due to a difference in the current flowing through the first transistor and a gate voltage is maintained by a capacitor; a third transistor that resets a gate electrode of the second transistor; and a fourth transistor that controls a current flowing through the second transistor or an output voltage of the second transistor and transmits the controlled current or output voltage to a readout circuit.
15 US10438042B2
Optical fingerprint recognition sensor
Publication/Patent Number: US10438042B2 Publication Date: 2019-10-08 Application Number: 15/422,579 Filing Date: 2017-02-02 Inventor: Kim, Jaemin   Kim, Kijoong   Kwon, Ow Tae   Hur, Ji Ho   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: G06F9/00 Abstract: An optical fingerprint recognition sensor may improve internal light utilization efficiency and includes: a glass substrate; a protection layer that is positioned on the glass substrate; an active layer that is positioned above the glass substrate and in the protection layer; and a functional layer that is positioned in the protection layer and on the active layer and that includes a first transparent oxide layer and a first metal layer that are sequentially stacked.
16 KR20190081871A
CURVED FINGERPRINT SENSOR
Publication/Patent Number: KR20190081871A Publication Date: 2019-07-09 Application Number: 20170184706 Filing Date: 2017-12-29 Inventor: Kim, Ki Joong   Go, Tae Han   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: H01L21/02 Abstract: According to one embodiment of the present invention, provided is a curved fingerprint recognition sensor which comprises: a fingerprint recognition sensor formed of a thin film transistor on a substrate; and a fixing member fixing the fingerprint recognition sensor and including a process for allowing the manufactured fingerprint recognition sensor to have a plurality of curvatures for the curved fingerprint recognition sensor.
17 US10410734B2
Shift register
Publication/Patent Number: US10410734B2 Publication Date: 2019-09-10 Application Number: 15/623,548 Filing Date: 2017-06-15 Inventor: Kim, Kijoong Kim   Yu, Jin Hyeong   Hur, Ji Ho   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: G11C19/00 Abstract: The present invention relates to a shift register configured of a plurality of stages applying two clock signals among four clock signals that are sequentially generated as an input and applying a start signal as the input, wherein a first stage charges the start signal to a P-node and outputs a first output signal and a first carry signal by using the voltage of the P-node as a driving voltage when a first clock signal is applied, and resets the P-node when a second clock signal is applied, a second stage pre-charges a start signal input to the first stage to the P-node, charges the first carry signal to the P-node, outputs a second output signal and a second carry signal by using the voltage of the P-node as the driving voltage when the second clock signal is applied, and resets the P-node when a third clock signal is applied, and a third stage and following stages pre-charge a carry signal of the second previous stage to the P-node, charge the carry signal of the previous stage to the P-node, output the output signal and the carry signal by using the voltage of the P-node as the driving voltage when the input clock signal secondly input to the P-node is input, and reset the P-node that is charged depending on the clock signal generated after the input clock signal.
18 US2019327435A1
SENSOR PIXEL OPERATING IN OPTICAL MODE AND CAPACITIVE MODE AND IMAGE SENSOR INCLUDING THE SAME
Publication/Patent Number: US2019327435A1 Publication Date: 2019-10-24 Application Number: 16/379,018 Filing Date: 2019-04-09 Inventor: Kim, Kijoong   Yu, Jin Hyeong   Park, Young Man   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: H04N5/374 Abstract: There is provided a sensor pixel, including: a first transistor controlled depending on a mode selection voltage supplied to one end thereof; a second transistor including a gate connected to the other end of the first transistor; and a photoconductor connected to one end of the second transistor, wherein the sensor pixel operates in an optical mode when the first transistor is turned on, and the sensor pixel operates in a capacitive mode when the first transistor is turned off.
19 US201889486A1
CAPACITIVE FINGERPRINT SENSOR
Publication/Patent Number: US201889486A1 Publication Date: 2018-03-29 Application Number: 20/161,556 Filing Date: 2016-04-07 Inventor: Hur, Ji Ho   Kim, Youn Suk   Hong, Bong Yeob   Yoo, Jin Hyeong   Kim, Ki Joong   Assignee: SILICON DISPLAY TECHNOLOGY   SILICON DISPLAY TECHNOLOGY   IPC: G06K9/00 Abstract: The present invention relates to a capacitive fingerprint sensor, and the capacitive fingerprint sensor includes: a fingerprint sensor electrode for sensing a fingerprint of a human body; a first transistor of which a current or an output voltage is changed according to a voltage change of capacitive coupling formed by fingerprint capacitance formed when a fingerprint contacts the fingerprint sensor electrode and coupling capacitance formed for capacitive coupling; a fifth transistor that resets a gate electrode of the first transistor and applies capacitive coupling to the gate electrode of the first transistor through a coupling pulse; a second transistor of which a current or an output voltage is changed due to a difference in the current flowing through the first transistor and a gate voltage is maintained by a capacitor; a third transistor that resets a gate electrode of the second transistor; and a fourth transistor that controls a current flowing through the second transistor or an output voltage of the second transistor and transmits the controlled current or output voltage to a readout circuit.
20 KR20180010207A
산화물 반도체 박막 트랜지스터 및 그 제조 방법
Title (English): Thin oxide Semiconductor transistors and their Manufacturing methods
Publication/Patent Number: KR20180010207A Publication Date: 2018-01-30 Application Number: 20177035824 Filing Date: 2015-06-30 Inventor: Choi, Soon Ho   Moon, Sung Ryong   Assignee: SILICON DISPLAY TECHNOLOGY   IPC: H01L21/02 Abstract: 본 발명은 산화물 반도체 박막 트랜지스터 및 그 제조 방법에 관한 것으로, 산화물 반도체 박막 트랜지스터의 제조 방법은 기판 상에 게이트 층을 증착하고 패터닝하여 게이트 전극을 형성하는 제1 단계; 상기 게이트 전극 상에 게이트 절연막을 증착하는 제2 단계; 상기 게이트 절연막 상에 상기 산화물 반도체를 증착하고 패터닝하는 제3 단계; 및 상기 산화물 반도체 상에 불소(F)가 포함된 플라즈마를 이용해 처리를 하는 제4 단계;를 포함한다.