Patents Assigned to Himax Technologies Limited
  • Patent number: 11915512
    Abstract: A three-dimensional sensing system includes a plurality of scanners each emitting a light signal to a scene to be sensed and receiving a reflected light signal, according to which depth information is obtained. Only one scanner executes transmitting corresponding light signal and receiving corresponding reflected light signal at a time.
    Type: Grant
    Filed: October 14, 2021
    Date of Patent: February 27, 2024
    Assignee: Himax Technologies Limited
    Inventors: Ching-Wen Wang, Cheng-Che Tsai, Ting-Sheng Hsu, Min-Chian Wu
  • Publication number: 20240054937
    Abstract: A gate driving device and an operating method are provided. The gate driving device includes a plurality of gate driving circuits and a control circuit. The gate driving circuits generate a plurality of gate driving signals having different timing. The control circuit is coupled to a plurality of candidate gate driving circuits among the gate driving circuits. The control circuit selects one of the candidate gate driving circuits as an initial stage gate driving circuit per one scanning cycle. A series connection mode between the gate driving circuits is changed in response to a scan selection signal.
    Type: Application
    Filed: August 3, 2022
    Publication date: February 15, 2024
    Applicant: HIMAX TECHNOLOGIES LIMITED
    Inventors: Yen-Hua Lin, Chuan-Chien Hsu, Han-Shui Hsueh, Wei-Hong Du
  • Patent number: 11900854
    Abstract: A display device includes a display panel and a circuit. For a first sub-pixel, the circuit obtains a corresponding second sub-pixel. The circuit calculates a first compensation value according to the grays levels of the first sub-pixel and the second sub-pixel, and calculates a second compensation value according to the polarity states of the first sub-pixel and the second sub-pixel and the difference between the gray levels of the two sub-pixels. The circuit also calculates a gain according to the position of the first sub-pixel, compensates the gray level to the first sub-pixel according to the first compensation value, the second compensation value and the gain to obtain an output gray level, and drives the first sub-pixel according to the output gray level.
    Type: Grant
    Filed: June 16, 2023
    Date of Patent: February 13, 2024
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Cheng-Hsun Lee, Tsai Hsing Chen, Cheng Che Tsai, Ching-Wen Wang
  • Patent number: 11900643
    Abstract: An object detection method, for detecting a target object, comprising: capturing at least two detection portions with a first aspect ratio from an input image with a second aspect ratio; confirming whether any object is detected in each of the detection portions and obtaining corresponding boundary boxes for detected objects; and wherein the first aspect ratio is different to the second aspect ratio.
    Type: Grant
    Filed: September 17, 2021
    Date of Patent: February 13, 2024
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: I-Wei Chen, Ta-Jen Kuo, Pin-Rong Chen
  • Patent number: 11886666
    Abstract: A detection circuit adaptable to a fingerprint detection system includes an integrating amplifier coupled to receive a photo-detected voltage from a sensor panel and configured to generate time integral of the photo-detected voltage, thereby resulting in a time-integral signal; and an analog-to-digital converter (ADC) that converts the time-integral signal into a digital form. A first common-mode voltage of the sensor panel is coupled to the integrating amplifier to prevent noise occurred in the first common-mode voltage from affecting the time-integral signal.
    Type: Grant
    Filed: December 28, 2022
    Date of Patent: January 30, 2024
    Assignee: Himax Technologies Limited
    Inventors: Yaw-Guang Chang, Jia-Ming He, Zong-You Hou
  • Patent number: 11876513
    Abstract: A low power consumption boost circuit for providing high driving voltage of a touch circuit is provided. The low power consumption boost circuit includes a charge pump circuit, two digital-to-analog converters (DACs), and a switch circuit. The charge pump circuit receives a system voltage and correspondingly outputs a positive output voltage twice the system voltage and a negative output voltage with opposite polarity as the system voltage. One of the DACs receives the positive output voltage from the charge pump circuit as supply voltage, and the other DAC receives the negative output voltage from the charge pump circuit as supply voltage. The switch circuit is connected between the DACs and the touch circuit. The DACs are connected between the charge pump circuit and the switch circuit. The DACs are alternately connected to the touch circuit by controlling the switch circuit, thereby driving the touch circuit alternately.
    Type: Grant
    Filed: February 12, 2023
    Date of Patent: January 16, 2024
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Jia-Ming He, Yaw-Guang Chang, Zong-You Hou
  • Patent number: 11874985
    Abstract: A driving signal processing method for a large touch display integrated (LTDI) system is provided. The LTDI system includes plural LTDI chips that are concatenated. The LTDI chips include a master LTDI chip and plural slave LTDI chips. The driving signal processing method includes: receiving, by the LTDI chips, display data from a timing controller; and dispersedly outputting, by the master LTDI chip and at least one of the slave LTDI chips, M gate control signals respectively corresponding to M gate lines of a display panel of the LTDI system according to the display data during the display stage of the display panel.
    Type: Grant
    Filed: January 19, 2023
    Date of Patent: January 16, 2024
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Yaw-Guang Chang, Pei Yao Chang, De Wei Shen, Yi Wen Wang
  • Patent number: 11874463
    Abstract: A waveguide combiner includes an in-coupling area, a waveguide body, an out-coupling area and at least one film layer. The in-coupling area is configured to introduce a light beam. The waveguide body is configured to guide the light beam introduced by the in-coupling area. The out-coupling area is configured to output the light beam guided by the waveguide body. Said at least one film layer is embedded in at least one portion of the in-coupling area, the waveguide body and the out-coupling area. Said at least one film layer is configured to divide said at least one portion of the in-coupling area, the waveguide body and the out-coupling area into a plurality of layers, and the light beam is reflected by said at least one film layer or penetrates said at least one film layer between different layers of the plurality of layers.
    Type: Grant
    Filed: August 4, 2021
    Date of Patent: January 16, 2024
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Jiun-Yi Lien, Chien-Feng Hung
  • Patent number: 11854302
    Abstract: A system for calibrating a three-dimensional scanning device includes a structured-light scanner capable of performing a structured-light operation, and a processor that performs calibration on a device under calibration (DUC). The structured-light scanner captures a base image by performing the structured-light operation prior to calibration. The structured-light scanner captures a calibration image with respect to corresponding DUC during calibration, and the calibration image is inputted to the processor, which determines transformation mapping from the calibration image to the base image. The determined transformation is then transferred to the DUC during calibration.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: December 26, 2023
    Assignee: Himax Technologies Limited
    Inventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
  • Patent number: 11847077
    Abstract: A serial peripheral interface (SPI) integrated circuit (IC) and an operation method thereof are provided. A SPI architecture includes a master IC and a slave IC. When the SPI IC is a master IC, the SPI IC generates first command information for a slave IC, generates first debugging information corresponding to the first command information, and sends the first command information and the first debugging information to the slave IC through a SPI channel. When the SPI IC is the slave IC, the SPI IC receives second command information and second debugging information sent by the master IC through the SPI channel and checks the second command information by using the second debugging information. When the SPI IC is a target slave circuit selected by the master IC, the SPI IC executes the second command information under a condition that the second command information is checked and is correct.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: December 19, 2023
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Shan-Chieh Wen, Ming-Huai Weng, Guei-Lan Lin, Che-Hao Chiang, Chi-Cheng Lin
  • Patent number: 11847083
    Abstract: The disclosure provides a daisy-chain serial peripheral interface (SPI) integrated circuit (IC) and an operation method thereof. The daisy-chain SPI IC includes a first MISO interface circuit, a second MISO interface circuit, a first data enable (DE) interface circuit, and a second DE interface circuit. When the daisy-chain SPI IC is a target slave circuit selected by a master IC for reading target data, the first DE interface circuit outputs a DE signal to the master IC, and the first MISO interface circuit sends back the target data to the master IC based on the timing of the DE signal. When the daisy-chain SPI IC is not the target slave circuit, the signal received by the second DE interface circuit is transmitted to the first DE interface circuit, and the data received by the second MISO interface circuit is transmitted to the first MISO interface circuit.
    Type: Grant
    Filed: December 16, 2021
    Date of Patent: December 19, 2023
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Shan-Chieh Wen, Ming-Huai Weng, Guei-Lan Lin, Che-Hao Chiang, Chi-Cheng Lin
  • Patent number: 11847788
    Abstract: A depth processor including a region of interest determination circuit and a depth decoder is provided. The region of interest determination circuit is configured to determine a size of a region of interest of an input image. The depth decoder is coupled to the region of interest determination circuit and configured to generate a depth map of the input image according to a filter size. The filter size is set according to the size of the region of interest of the input image.
    Type: Grant
    Filed: April 15, 2021
    Date of Patent: December 19, 2023
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
  • Patent number: 11842560
    Abstract: The fingerprint sensing circuit includes pixel sensors with photo sensors. Sensing currents produced by first pixel sensors are averaged. The average current is subtracted from sensing current produced by second pixel sensors to generate a difference current. During a capture period, a converting circuit outputs a digital signal in response to the difference current. This circuit aims to reduce noise in fingerprint recognition technology.
    Type: Grant
    Filed: May 24, 2023
    Date of Patent: December 12, 2023
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Yaw-Guang Chang, Jia-Ming He, Zong-You Hou
  • Patent number: 11842703
    Abstract: The panel driving circuit includes a channel circuit, first pads, first switches, a second pad, and at least one second switch. The first pads are configured to be electrically connected to data lines of a cholesteric liquid crystal (CHLC) panel respectively. Each first switch has a first terminal electrically connected to the channel circuit, and a second terminal electrically connected to one of the first pads. Each second switch has a first terminal electrically connected to the second pad, and a second terminal electrically connected to the first pads. In a pixel charging period, the first switches are turned on, and the second switch is turned off. In a test period, the first switch is turned off, the second switch is turned on, and the second pad is configured to receive a measurement signal for measuring capacitance of pixels in the CHLC panel.
    Type: Grant
    Filed: November 9, 2022
    Date of Patent: December 12, 2023
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventor: Han Wen Huang
  • Publication number: 20230393689
    Abstract: A touch display device and an operating method for the touch display device are provided. The touch display device includes a touch display panel, a touch display driving circuit and a computing circuit. The touch display driving circuit drives the touch display panel to perform a display operation based on a scan frequency and to perform a touch sensing operation based on a plurality of touch sensing cycles. The computing circuit determines a plurality of scan finishing positions on the touch display panel in response to the scan frequency and the touch sensing cycles, receives a touch sensing data corresponding to the scan finishing positions, and compensates the touch sensing data based on a base value.
    Type: Application
    Filed: June 7, 2022
    Publication date: December 7, 2023
    Applicant: HIMAX TECHNOLOGIES LIMITED
    Inventors: Po-Kai Tseng, Jing-Ho Chen, Chien-Cheng Liao, Chih-Chen Tsai, Li-Lin Liu
  • Patent number: 11816289
    Abstract: A touch display device and an operating method for the touch display device are provided. The touch display device includes a touch display panel, a touch display driving circuit and a computing circuit. The touch display driving circuit drives the touch display panel to perform a display operation based on a scan frequency and to perform a touch sensing operation based on a plurality of touch sensing cycles. The computing circuit determines a plurality of scan finishing positions on the touch display panel in response to the scan frequency and the touch sensing cycles, receives a touch sensing data corresponding to the scan finishing positions, and compensates the touch sensing data based on a base value.
    Type: Grant
    Filed: June 7, 2022
    Date of Patent: November 14, 2023
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Po-Kai Tseng, Jing-Ho Chen, Chien-Cheng Liao, Chih-Chen Tsai, Li-Lin Liu
  • Patent number: 11808953
    Abstract: A microlens array device includes a substrate and a microlens array. The microlens array is disposed on the substrate and includes a plurality of first lenses and a plurality of second lenses. Each of the first lenses is used to project a first pattern on a far field. Each of the second lenses is used to project a second pattern on the far field. The first pattern has a first area on the far field. The second pattern has a second area on the far field. The first area is different from the second area. One of the two patterns is completely overlapped on the other one of the two patterns.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: November 7, 2023
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventor: Yu-Ching Cheng
  • Patent number: 11809070
    Abstract: A switchable projector module includes a holder, a projector, and a switchable diffuser. The holder includes a first connection tank and a second connection tank, in which the second connection tank is located at a side of the first connection tank. The second connection tank has a spilling glue trench. The projector is engaged with the first connection tank and is configured to project a pattern image onto the second connection tank. The switchable diffuser is engaged with the second connection tank. The switchable diffuser is configured to switch between a first mode and a second mode, so as not to diffuse the pattern image in the first mode and diffuse the pattern image in the second mode.
    Type: Grant
    Filed: August 21, 2022
    Date of Patent: November 7, 2023
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Han Yi Kuo, Yin Tung Lu, Shi Jen Wu
  • Patent number: 11808959
    Abstract: An optical element including a first substrate, a second substrate, a first optical film, a second optical film, and a spacer is provided. The first optical film is disposed on the first substrate and has a first surface and a plurality of first optical microstructures. The first optical microstructures are disposed on the first surface. The second optical film is disposed on the second substrate and has a second surface and a plurality of second optical microstructures. The second surface is opposite to the first surface. The second optical microstructures are disposed on the second surface. The orthogonal projection of the first optical microstructures on the first substrate does not overlap with the orthogonal projection of the second optical microstructures on the first substrate. The spacer is disposed between the first substrate and the second substrate. A wafer level optical module adopting the optical element is also provided.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: November 7, 2023
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Chih-Sheng Chang, Meng-Ko Tsai, Teng Te Huang
  • Patent number: 11808985
    Abstract: A waveguide combiner includes an in-coupling area, a waveguide body and an out-coupling area. The in-coupling area is configured to introduce a light beam. The waveguide body is configured to guide the light beam introduced by the in-coupling area. The out-coupling area is configured to output the light beam guided by the waveguide body. The waveguide body includes at least one of a beam-expanding part configured to expand the light beam to a predetermined direction by reflecting the light beam and a beam-folding part configured to change the light beam to a different direction by reflecting the light beam.
    Type: Grant
    Filed: October 12, 2021
    Date of Patent: November 7, 2023
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventor: Jiun-Yi Lien