Silicon Display Technology

Ji Ho Hur

Kijoong Kim

Ki Joong Kim

Jin Hyeong Yu

Jaemin Kim

Young Man Park

Bong Yeob Hong

Youn Duck Nam

Moon Hyo Kang

Yong Ju Ham

Jin Hee Jang

Hyun Kil Nam

Jong Woo Jin

Soon Ho Choi

Taehan Go

Yong Kuk Kim

Ow Tae Kwon

Yeon Hwa Kim

Hyo Jun Kim

Jin Hyeong Yoo

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.

Sensor pixel, fingerprint and image sensor including the same, and driving method thereof

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.

Optical fingerprint recognition sensor

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.

Shift register

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.

Capacitive fingerprint sensor

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.

Level shifter and array apparatus

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 (T) 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 (T) due to a difference in reverse current of a photodiode generated by light and shade depending on existence or non-existence of the fingerprint.

Fingerprint recognition sensor capable of sensing fingerprint using optical and capacitive method

Disclosed is a fingerprint recognition sensor including: a backlight unit including a base layer positioned on one surface of a substrate and including a transparent material and a light source irradiating light to the inside of the base layer on one side of the base layer, in which light in which an incident angle on a surface facing the substrate is larger than a critical angle is transmitted toward the substrate; a cover layer spaced apart from the substrate and facing the other surface of the substrate; multiple sensor pixels defined by multiple scan lines and multiple data readout lines on the other surface of the substrate and positioned between the substrate and the cover layer; and multiple photo sensors positioned in the respective sensor pixels and sensing light transmitted on the base layer toward the substrate and total-reflected on a surface contacting a fingerprint of a user on the cover layer.

Fingerprint recognition sensor

Disclosed are a fingerprint recognition sensor including: a light source positioned while being spaced apart on one surface of the substrate and irradiating light toward the substrate; and a light direction switching layer positioned between the substrate and the light source, having a thickness-direction cross-section having a right-angled triangular shape, and including multiple protrusions constituted by a first surface in which the light irradiated from the light source is incident and refracted, a second surface contacting the one surface of the substrate, in which the refracted light is transmitted toward the substrate, and a third surface vertical to the one surface of the substrate, and a mobile display device having the same.

Fingerprint recognition sensor and portable display device having the same

The present invention relates to an optical fingerprint sensor which can comprise: a backlight unit for irradiating light; an uneven surface layer onto which the light from the backlight unit is irradiated; and a photosensor unit arranged between the backlight unit and the uneven surface layer so as to detect the light irradiated from the backlight unit and reflected from a user's fingerprint coming into contact with the uneven surface layer.

Optical fingerprint sensor

An exemplary embodiment of the present invention provides an infrared image sensor including: a sensor pixel connected with a data lead-out line and a scan line disposed on a surface of a substrate; a wavelength converter positioned in the sensor pixel and disposed in an internal movement path of infrared rays, including an anti-Stokes material that absorbs infrared rays and converts them into visible rays to emit them; and a photosensor part positioned in the sensor pixel to sense the visible rays converted by the wavelength converter.

Infrared image sensor

Provided is a intensified sensor array for static electricity having a structure in which a static electricity preventing wiring covers an upper surface of a pixel circuit to cut off static electricity, so when static electricity of a high voltage is momentarily generated, the static electricity induced through the static electricity preventing wiring is discharged, thereby being capable of effectively protecting the pixel circuit of a lower part from the static electricity.

Intensified sensor array for static electricity

Provided is a transparent fingerprint recognizing sensor array, including: a pixel driving circuit formed on a substrate; an antistatic wiring disposed in an upper part of the pixel driving circuit; and a pixel electrode connected to the pixel driving circuit, wherein the pixel electrode is made of a transparent material or has an open formed in a center part thereof.

Transparent fingerprint recognizing sensor array

Provided is a thin film transistor liquid crystal display (TFT LCD) in which a capacitive touch sensor is embedded, the TFT LCD comprising: a touch sensor source follower TFT formed on a substrate; a first electrode connected to a gate electrode of the touch sensor source follower TFT; a touch sensor reset TFT including the first electrode; an insulator film formed on the first electrode; a second electrode formed on the insulator film; and a display switching TFT including the second electrode, wherein the second electrode is connected to a drain electrode of the display switching TFT; the touch sensor reset TFT and the gate electrode of the touch sensor source follower TFT share the first electrode; and the first electrode is connected to the gate electrode of the touch sensor source follower TFT.

Thin film transistor liquid crystal display having capacitive touch sensor embedded therein

The capacitive fingerprint sensor according to the exemplary embodiments of the present invention includes: a fingerprint sensing electrode Cfp for sensing a human fingerprint; a first transistor Tin which the amount of currents flowing therethrough changes depending on an output voltage of the fingerprint sensing electrode Cfp; a second transistor Tin which the amount of currents flowing therethrough changes due to a difference between the currents flowing through the first transistor T; and a third transistor Twhich resets a gate electrode of the first transistor Tand provides capacitive coupling with the gate electrode of the first transistor Tvia a pulse signal.

The present invention relates to an image sensor comprising an amorphous silicon thin-film transistor optical sensor which functions as an image sensor used for an X-ray photography device, a fingerprint recognition apparatus, a scanner, etc., and a method of manufacturing the image sensor. Since the thin-film transistor optical sensor according to the present invention has a high-resistance silicon region by disposing an offset region in a channel region, a dark leakage current of the optical sensor remains in a low level even under a high voltage. Therefore, it is possible to apply a high voltage to the thin-film transistor optical sensor according to the present invention so that the image senor can be sensitive to a weak light. In addition, since the storage capacitance in the image sensor is formed in a double structure, the image sensor has a high value of capacitance. Furthermore, since a lower common electrode is electrically connected to an upper common electrode, the image sensor has a stable structure.

Growing community of inventors

Yongin-si, South Korea

Ji Ho Hur