Patents by Inventor Kuan TANG

Kuan TANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210287601
    Abstract: An LED display system includes a driver chip and an LED array having m scan lines, n channels, and m scan switches. The driver chip includes an analog circuit and a digital controller that controls the analog circuit. The analog circuit has a plurality of power sources that are electrically connected to the LED array and provide a plurality of driving currents to the n channels of LEDs. Further, the n channels are divided into p groups and each group has q channels, p is an integer of 2 to n. Channels in each of the p groups receive a plurality of PWM signals. The starting times of the input PWM signals to at least two different groups among the p groups are different. Further, PMW signals to the channels in the same group may have a same starting time or may have different starting times.
    Type: Application
    Filed: March 16, 2021
    Publication date: September 16, 2021
    Inventors: Eric LI, Yi ZHANG, Shang-Kuan TANG, Shean-Yih CHIOU
  • Publication number: 20210267059
    Abstract: An electronic device includes a motherboard, a bridging device, and an add-in card. The motherboard includes a processor, a first circuit board, and a first connector. The processor is coupled to the first connector through the first circuit board. The bridging device includes a second circuit board and a second connector and is disposed on the motherboard and coupled to the first connector. The second connector is coupled to the first connector through the second circuit board. The add-in card includes a third circuit board and a peripheral circuit and is disposed on the bridging device and coupled to the second connector. The peripheral circuit is coupled to the second connector through the third circuit board. The processor is coupled to the peripheral circuit through a signal path including the first circuit board, the first connector, the second circuit board, the second connector, and the third circuit board.
    Type: Application
    Filed: April 26, 2020
    Publication date: August 26, 2021
    Applicant: Wiwynn Corporation
    Inventors: Tzu-Yu Wei, Yi-Tang Chen, Yi-Shian Chen, Chi-Hsiang Hung, Kuan-Wei Chen
  • Patent number: 11039517
    Abstract: A method for generating fractional PWM pulses to drive an light emitting device includes generating multiphase clock signals using a multiphase PLL or DLL includes the steps of generating a plurality of phases of PWM pulses that correspond to a number of phases of the multiphase clock signals, selecting two or more phases amongst the plurality of PWM pulses, performing logic operations of the selected phases of PWM pulses to generate fractional PWM pulses, and generating a driving current using the fractional PWM pulses in a current source. The light emitting device is can be an LED display comprising an LED array having a plurality of channels and a plurality of scan lines. The driving current drives LEDs in one of the plurality of channels.
    Type: Grant
    Filed: June 1, 2020
    Date of Patent: June 15, 2021
    Assignee: SCT LTD.
    Inventors: Eric Li, Shean-Yih Chiou, Shang-Kuan Tang, Juinn-Yan Chen, Yi Zhang, Zhenchao Liu
  • Patent number: 11018170
    Abstract: An image sensor includes a pair of pixel sharing circuits, a second reset transistor, an amplifier transistor, a readout transistor and a control circuit. The pair of pixel sharing circuits connected to a floating diffusion node, each including a photon device, a first reset transistor, a capture transistor, a holding transistor, a capacitor and a sharing transistor. The control circuit is configured to control the first reset transistor, the first capture transistor, the first holding transistor and the sharing transistor of each of the pair of sharing pixel circuits to be turned on or off.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: May 25, 2021
    Assignee: PIXART IMAGING INC.
    Inventors: Kuan Tang, Jui-Te Chiu, Yi-Cheng Chiu, Chia-Chi Kuo, Kai-Chieh Chuang
  • Patent number: 11012653
    Abstract: A method of image sensor apparatus includes: providing pixel array having pixel units arranged in M rows and N columns; providing N parallel column readout circuits each being arranged for reading out pixel data of one corresponding column; disposing a horizontal shift register in row direction coupled to the N parallel column readout circuits, to receive a pulse signal and a clock signal, sequentially shift a phase of the pulse signal according to the clock signal, and scan a corresponding column according to the shifted phase of the pulse signal; and using a column select circuit having N latches to receive a power down digital control signal transmitted from a microcontroller wherein the power down digital control signal is used to disable at least one column readout circuit to enable and select a portion of the set of N parallel column readout circuits.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: May 18, 2021
    Assignee: PixArt Imaging Inc.
    Inventors: Chia-Chi Kuo, Jui-Te Chiu, Han-Chi Liu, Wei-Chia Huang, Yi-Cheng Chiu, Kuan Tang
  • Publication number: 20210132198
    Abstract: A time-of-flight sensor for capturing a three-dimensional (3D) image of an object, includes: a light source for emitting projection light pulses at the object according to a projection signal; an array of pixel circuits for sensing reflection light pulses and storing image charges according to the reflection light pulses; and a processing circuit for calculating a first sum of first portions of the image charges and a second sum of second portions of the image charges to generate a distance information signal of the 3D image of the object simultaneously, wherein in one accumulation period, the first portion of the image charges is generated during a first time period, and the second portion of the image charges is generated during a second time period, wherein the second time period is directly following the first time period in the accumulation period.
    Type: Application
    Filed: November 5, 2019
    Publication date: May 6, 2021
    Inventors: KUAN TANG, KAI-CHIEH CHUANG, CHIA-CHI KUO, JUI-TE CHIU
  • Patent number: 10999549
    Abstract: A column parallel ADC circuit includes: plural column ADCs and a digital processing circuit. The plural column ADCs generate respective plural digital counts. The plural column ADCs include a first column ADC and a second column ADC. The first column ADC generates a first digital count according to a first analog signal, and the second column ADC generates a second digital count according to a second analog signal. The first digital count is a difference between a first digital signal and a second digital signal. The first and the second digital signals correspond to the first and the second analog signals respectively. The digital processing circuit generates the plural digital signals, wherein the digital processing circuit generates the first digital signal according to the first digital count and the second digital signal.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: May 4, 2021
    Assignee: PIXART IMAGING INCORPORATION
    Inventors: Kuan Tang, Yi-Cheng Chiu, Chia-Chi Kuo, Jui-Te Chiu
  • Publication number: 20210112215
    Abstract: A method of image sensor apparatus includes: providing pixel array having pixel units arranged in M rows and N columns; providing N parallel column readout circuits each being arranged for reading out pixel data of one corresponding column; disposing a horizontal shift register in row direction coupled to the N parallel column readout circuits, to receive a pulse signal and a clock signal, sequentially shift a phase of the pulse signal according to the clock signal, and scan a corresponding column according to the shifted phase of the pulse signal; and using a column select circuit having N latches to receive a power down digital control signal transmitted from a microcontroller wherein the power down digital control signal is used to disable at least one column readout circuit to enable and select a portion of the set of N parallel column readout circuits.
    Type: Application
    Filed: October 14, 2019
    Publication date: April 15, 2021
    Inventors: Chia-Chi Kuo, Jui-Te Chiu, Han-Chi Liu, Wei-Chia Huang, Yi-Cheng Chiu, Kuan Tang
  • Publication number: 20210112641
    Abstract: A method for generating fractional PWM pulses to drive an light emitting device includes generating multiphase clock signals using a multiphase PLL or DLL includes the steps of generating a plurality of phases of PWM pulses that correspond to a number of phases of the multiphase clock signals, selecting two or more phases amongst the plurality of PWM pulses, performing logic operations of the selected phases of PWM pulses to generate fractional PWM pulses, and generating a driving current using the fractional PWM pulses in a current source. The light emitting device is can be an LED display comprising an LED array having a plurality of channels and a plurality of scan lines. The driving current drives LEDs in one of the plurality of channels.
    Type: Application
    Filed: June 1, 2020
    Publication date: April 15, 2021
    Inventors: Eric Li, Shean-Yih Chiou, Shang-Kuan Tang, Juinn-Yan Chen, Yi Zhang, Zhenchao Liu
  • Publication number: 20200411571
    Abstract: An image sensor includes a pair of pixel sharing circuits, a second reset transistor, an amplifier transistor, a readout transistor and a control circuit. The pair of pixel sharing circuits connected to a floating diffusion node, each including a photon device, a first reset transistor, a capture transistor, a holding transistor, a capacitor and a sharing transistor. The control circuit is configured to control the first reset transistor, the first capture transistor, the first holding transistor and the sharing transistor of each of the pair of sharing pixel circuits to be turned on or off.
    Type: Application
    Filed: June 28, 2019
    Publication date: December 31, 2020
    Inventors: KUAN TANG, JUI-TE CHIU, YI-CHENG CHIU, CHIA-CHI KUO, KAI-CHIEH CHUANG
  • Publication number: 20200404205
    Abstract: A column parallel ADC circuit includes: plural column ADCs and a digital processing circuit. The plural column ADCs generate respective plural digital counts. The plural column ADCs include a first column ADC and a second column ADC. The first column ADC generates a first digital count according to a first analog signal, and the second column ADC generates a second digital count according to a second analog signal. The first digital count is a difference between a first digital signal and a second digital signal. The first and the second digital signals correspond to the first and the second analog signals respectively. The digital processing circuit generates the plural digital signals, wherein the digital processing circuit generates the first digital signal according to the first digital count and the second digital signal.
    Type: Application
    Filed: June 20, 2019
    Publication date: December 24, 2020
    Inventors: KUAN TANG, YI-CHENG CHIU, CHIA-CHI KUO, JUI-TE CHIU
  • Publication number: 20200388211
    Abstract: A method for motion blur in an LED display system includes the steps of connecting an LED display panel to a driver circuit; sending, from a transmitter, image data in a plurality of image frames at a predetermined frame rate and a predetermined refresh rate to the driver circuit, wherein each of the plurality of image frames has a frame time period (Tframe) comprising a plurality of refresh time periods (Trefresh); outputting a driving current in the driver circuit to drive the LED display; and turning off the driving current for a period of time (Tinactive). Tinactive bridges two adjacent frame time periods. The value of Tinactive can be determined according to a viewer of persistence of vision or by calibrating the LED display.
    Type: Application
    Filed: July 31, 2020
    Publication date: December 10, 2020
    Inventors: Yi Zhang, Eric Li, Raymond Ho, WeiHao Chang, Juinn-Yan Chen, Shang-Kuan Tang
  • Publication number: 20200197515
    Abstract: The present invention relates generally to the field of allergies. More particularly, the present invention provides a method for treating an allergy in a subject by inducing tolerance to an allergen associated with the allergy. Medicinal kits useful in protocols to induce tolerance or reduce intolerance in a subject also form part of the present invention.
    Type: Application
    Filed: February 28, 2020
    Publication date: June 25, 2020
    Inventor: Mimi Lai-Kuan TANG
  • Publication number: 20200184881
    Abstract: An LED display system has and LED display panel coupled to a driver circuitry. The driver circuitry includes a scrambled PWM generator, a register, and a memory. The scrambled PWM generator receives an image data from an external source and, after certain compensations, is sent to a scramble PWM generator to be distributed according to a new set of rules that involves a compensation image data K. Image data K can be an empirical value or obtained according a formula using coefficients p and q, which can be obtained by calibration.
    Type: Application
    Filed: February 14, 2020
    Publication date: June 11, 2020
    Inventors: Eric LI, Yi ZHANG, Shang-Kuan TANG, Shean-Yih CHIOU
  • Patent number: 10593256
    Abstract: An LED display device includes a transmitter having a memory and a pixel mapping table, a plurality of first receivers coupled to the transmitter, a plurality of second receiver modules, and a plurality of LED driver groups. A unique address is assigned to a data packet with a use of the pixel mapping table. The data packet has a set of field information and the set of field information includes the unique address. Each of the second receiver modules is coupled to at least one of the first receivers and includes a plurality of second receivers. None of the plurality of second receivers comprises a pixel mapping memory. Each of the LED driver groups is coupled to one of the plurality of second receivers and includes a plurality of LED drivers.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: March 17, 2020
    Assignee: SCT LTD.
    Inventors: Eric Li, Juinn-Yan Chen, Shean-Yih Chiou, Shang-Kuan Tang
  • Patent number: 10565928
    Abstract: An LED display system has an LED display panel coupled to a driver circuitry. The driver circuitry includes a scrambled PWM generator, a register, and a memory. The driver circuit receives an image data from an external source and, after certain compensations, the compensated data is sent to the scrambled PWM generator to be distributed according to a new set of rules. Compared with existing technologies, this LED display has a host of benefits, including having a uniform optical energy output at low brightness.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: February 18, 2020
    Assignee: SCT LTD.
    Inventors: Eric Li, Yi Zhang, Shuang-Kuan Tang
  • Publication number: 20190360863
    Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
    Type: Application
    Filed: May 13, 2019
    Publication date: November 28, 2019
    Inventors: Kuan TANG, Yi-Cheng CHIU, Chia-Chi KUO, Jui-Te CHIU, Han-Chi LIU
  • Publication number: 20190311673
    Abstract: An LED display system has and LED display panel coupled to a driver circuitry. The driver circuitry includes a scrambled PWM generator, a register, and a memory. The scrambled PWM generator receives an image data from an external source and, after certain compensations, is sent to a scramble PWM generator to be distributed according to a new set of rules. Compared with existing technologies, this LED display has a host of benefits, including having a uniform optical energy output at low brightness.
    Type: Application
    Filed: April 4, 2018
    Publication date: October 10, 2019
    Inventors: Eric LI, Yi ZHANG, Shuang-Kuan TANG
  • Publication number: 20190295457
    Abstract: An LED display device includes a transmitter having a memory and a pixel mapping table, a plurality of first receivers coupled to the transmitter, a plurality of second receiver modules, and a plurality of LED driver groups. A unique address is assigned to a data packet with a use of the pixel mapping table. The data packet has a set of field information and the set of field information includes the unique address. Each of the second receiver modules is coupled to at least one of the first receivers and includes a plurality of second receivers. None of the plurality of second receivers comprises a pixel mapping memory. Each of the LED driver groups is coupled to one of the plurality of second receivers and includes a plurality of LED drivers.
    Type: Application
    Filed: March 22, 2018
    Publication date: September 26, 2019
    Inventors: Eric LI, Juinn-Yan Chen, Shean-Yih CHIOU, Shang-Kuan TANG
  • Patent number: D892397
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: August 4, 2020
    Assignee: SHENZHEN SMOORE TECHNOLOGY LIMITED
    Inventors: Kui Li, Weidong Zhou, Kuan Tang