Patents Assigned to Himax Technologies Limited
  • Patent number: 11113818
    Abstract: A timing controller includes an image compensator for generating compensated image data. The image compensator is configured to: divide an input image into plural image blocks; select plural pixels located at one column of the image block as plural target pixels; generate an average representative gray level of the image block according to a histogram of gray levels of the image block; input the average representative gray level into a first lookup table to obtain a first gain; input a vertical pixel position of the target pixel and the average representative gray level into a second lookup table to obtain a second gain; obtain the compensated gray level by multiplying the gray level, the first gain, and the second gain of the target pixel; and replace the gray levels with the compensated gray levels to acquire the compensated image data.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: September 7, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventor: Tung-Ying Wu
  • Patent number: 11114048
    Abstract: A driving circuit adaptable to an electrophoretic display includes a first transistor and a second transistor electrically connected in series between a first positive voltage node and a first negative voltage node, the first transistor and the second transistor being interconnected at an output node; a third transistor electrically connected between the output node and a ground; a first voltage regulator that switchably provides one of a plurality of positive supply voltages to the first positive voltage node; a second voltage regulator that provides a negative supply voltage to the first negative voltage node; a switching circuit having a plurality of outputs electrically connected to the first transistor, the second transistor and the third transistor to turn on or off the first transistor, the second transistor and the third transistor respectively; and a controller that controls the first voltage regulator, the second voltage regulator and the switching circuit.
    Type: Grant
    Filed: December 9, 2020
    Date of Patent: September 7, 2021
    Assignee: Himax Technologies Limited
    Inventor: Han Wen Huang
  • Patent number: 11094268
    Abstract: The local dimming method includes: dividing a digital image into multiple blocks and calculating a backlight parameter of each of the blocks; performing a backlight simulation based on the backlight parameters to calculate source brightness of each pixel; quantifying the backlight parameters into multiple reference backlight parameters according to numerical ranges; performing the backlight simulation based on the reference backlight parameters to calculate reference source brightness of each pixel; for each of the pixels, setting a gain of the pixel to be less than or equal to a first value if the corresponding reference source brightness is equal to the darkest backlight parameter, otherwise determining the gain of the pixel according to a ratio of the source brightness to the reference source brightness; adjusting grey levels of the pixels according to the gains to obtain adjusted grey levels and driving the display panel according to the adjusted grey levels.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: August 17, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Wu-Feng Chen, Hsueh-Tsung Lu, Tsai-Hsing Chen, Cheng-Che Tsai
  • Patent number: 11087708
    Abstract: The present invention provides a method for transmitting data from a timing controller to a source driver, wherein the method includes the steps of: applying a plurality of data rates to a discrete data rate setting; and transmitting image data of a plurality of frames by using a plurality of modulated data rates, respectively; wherein the plurality of modulated data rates are generated by performing spread-spectrum clocking (SSC) upon the plurality of data rates, respectively; and for each of the frames, its corresponding image data is transmitting by using only one of the modulated data rates.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: August 10, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Mong-Hua Tu, Peng-Chi Chen, Chih-Hsiang Lin, Yin-Ho Chiang, Jen-Chieh Liu, Shih-Po Chen, Cheng-Yu Shih, Chien-Lung Cho, Yi-Ping Tu
  • Patent number: 11087481
    Abstract: A method for detecting dimension of box based on depth map includes: receiving a depth map generated by a camera, the depth map corresponds to pixels of an image including a box; performing a coordinate transformation to transform the depth map into camera coordinates of each of the pixels; dividing some of the pixels into plural blocks, each of blocks includes a number of the pixels adjacent to each other; statistically analyzing an average normal vector of each of the blocks according to the camera coordinates of the pixels of each of the blocks; classifying the blocks into plural clusters according to the average normal vector of each of the blocks; performing a plane extraction to obtain edge vectors according to plane formulas of the clusters; obtaining vertexes of the box according to the edge vectors; and obtaining a dimension of the box according the vertexes.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: August 10, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventor: Ying-Han Yeh
  • Patent number: 11085609
    Abstract: An illumination device including a light source array and a microlens array is provided. The light source array includes a plurality of light sources arranged in an array. The microlens array includes a plurality of microlenses arranged in an array. The illumination device satisfies the following conditional expressions so as to produce structured light: z=z0+dz and z0=(m/2)*(P2/?), where z is a distance between the light source array and the microlens array along a central axis of the microlens array, P is a lens pitch of the microlens array, ? is a wavelength of the light sources, m is an integer and m? is a non-integer number. The illumination device satisfies 1%?dz/z0?5% or ?5%?dz/z0??1%.
    Type: Grant
    Filed: February 8, 2021
    Date of Patent: August 10, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventor: Yu-Ching Cheng
  • Patent number: 11087660
    Abstract: A timing controller and an operating method are provided. The timing controller includes a bit capture circuit and a gear position signal generation circuit. The bit capture circuit is configured to capture a first part bit from each of a plurality of original sub-pixel data of a video stream. The gear position signal generation circuit determines a gear position signal related to a current frame according to the first part bits. The gear position signal is provided to a gamma voltage generation circuit of a source driver such that the gamma voltage generation circuit changes a plurality of gamma voltages according to the gear position signal.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: August 10, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventor: Tung-Ying Wu
  • Patent number: 11086443
    Abstract: A touch apparatus, a touch driving device and an operation method are provided. The touch driving device includes a first routing circuit, a second routing circuit, and a processing circuit. The first routing circuit connects a first current electrode of first sensing electrodes to a first common terminal of the first routing circuit. The second routing circuit connects a second current electrode of second sensing electrodes to a second common terminal of the second routing circuit. The same input terminal of the processing circuit is coupled to the first common terminal and the second common terminal. In the case where a touch sensing result corresponding to the input terminal indicates that a touch event has occurred, the processing circuit checks whether the touch event also occurs on an adjacent sensing electrode adjacent to the first current electrode to determine whether the touch event occurs on the first current electrode.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: August 10, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Yaw-Guang Chang, En-Tse Cun
  • Patent number: 11080862
    Abstract: A reliability based keyframe switching system adaptable to iterative closest point (ICP) includes a camera that captures frames; a matching device that determines corresponding pairing between the frames for an ICP operation to form a set of plural point-pairs; a transformation device that performs transformation estimation to estimate transformation that minimizes distances of the point-pairs, and determines whether the estimated transformation converges; and a reliability device that determines whether the ICP operation is reliable, and replaces a current keyframe with a new keyframe if the ICP operation is determined to be unreliable.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: August 3, 2021
    Assignees: NCKU Research and Development Foundation, Himax Technologies Limited
    Inventors: Ming-Der Shieh, Chun-Wei Chen, Ji-Ying Li
  • Patent number: 11079720
    Abstract: A holographic display system includes a light source that emits coherent light; a lateral displacement beam splitter that optically receives the coherent light and generates first reference light and second reference light; a first spatial light modulator (SLM) and a second SLM that optically receive the first reference light and the second reference light respectively, and construct first phase-only function (POF) light and second POF light respectively; a first beam splitter and a second beam splitter that optically receive the first POF light and the second POF light respectively, and generate first split light and second split light respectively; and a plurality of polarizers disposed between the first SLM and the first beam splitter, and between the second SLM and the second beam splitter, respectively.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: August 3, 2021
    Assignees: National Taiwan University, Himax Technologies Limited
    Inventors: Chien-Yu Chen, Chih-Hao Chuang, Hoang-Yan Lin
  • Patent number: 11073941
    Abstract: A driving device and an operation method thereof are provided. The driving device is configured to drive a self-emissive display panel (e.g., an organic light emitting diode (OLED) display panel). The self-emissive display panel is an in-cell touch panel. The driving device includes a driving circuit and a control circuit. The driving circuit is configured to drive a plurality of pixel circuits of the self-emissive display panel during a first sub-period of a frame period to display an image frame. The control circuit is configured to control the driving circuit to set the pixel circuits not to emit light during a second sub-period of the same frame period. The control circuit performs a touch detection operation on the self-emissive display panel during the same second sub-period.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: July 27, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventor: Ilin Wu
  • Patent number: 11067820
    Abstract: A structured light projector including a light source, an irradiation range controlling device, and a diffractive optical element is provided. The irradiation range controlling device is disposed on a transmission path of a light beam from the light source. The diffractive optical element is disposed on a transmission path of the light beam from the irradiation range controlling device. The irradiation range controlling device is adapted to control an irradiation range of the light beam transmitted to the diffractive optical element so as to change a size of a region of the diffractive optical element illuminated by the light beam from the irradiation range controlling device. A three-dimensional image sensing module using the same is also provided.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: July 20, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Ming-Shu Hsiao, Yi-Nung Liu
  • Patent number: 11061500
    Abstract: A touch display driving apparatus and an operation method thereof are provided. A display frame period is divided into a plurality of display driving periods and a plurality of touch driving periods. During the display driving periods, the display driver circuit drives a touch display panel. During the touch driving periods, the touch driver circuit detects common electrode rows of the touch display panel. The common electrode rows are parallel to a plurality of gate lines of the touch display panel. Each of the common electrode rows serves as a current common electrode row, wherein the current common electrode row covers a plurality of corresponding gate lines of the gate lines. The touch driving period during which the current common electrode row being detected is not temporally adjacent to the display driving period during which the corresponding gate lines being driven.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: July 13, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Yaw-Guang Chang, Wei-Song Wang
  • Patent number: 11054849
    Abstract: A source driver including an output buffer and a feedback circuit is provided. The output buffer includes an input stage circuit, an output stage circuit, a rising control circuit, and a falling control circuit. The input stage circuit correspondingly generates a first gate control voltage and a second gate control voltage according to an input voltage and a first feedback voltage. The output stage circuit correspondingly generates an output voltage according to the first gate control voltage and the second gate control voltage. The feedback circuit generates and outputs the first feedback voltage corresponding to the output voltage to the input stage circuit. The rising control circuit and the falling control circuit compare the input voltage with the first feedback voltage, and pull down (or pull up) the first gate control voltage and the second gate control voltage according to the comparison result.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: July 6, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventor: Chia-Chu Chien
  • Patent number: 11055508
    Abstract: A display panel and an associated electronic device are provided. The display panel may include: a plurality of display blocks arranged to display images, a plurality of light sensors arranged to perform light sensing, a plurality of sets of switches, and a detection circuit. The plurality of sets of switches may combine the plurality of light sensors into a plurality of combined sensors, respectively, wherein the plurality of sets of switches operate according to a plurality of switching signals, respectively. The detection circuit may be coupled to two sets of combined sensors within the plurality of combined sensors, and arranged to detect a voltage level of a combined sensor of one set of the two sets of combined sensors according to a reference voltage level, for performing fingerprint detection through the display panel, wherein the reference voltage level is obtained from another set of the two sets of combined sensors.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: July 6, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Jia-Ming He, Yaw-Guang Chang, I-Lin Wu
  • Patent number: 11048850
    Abstract: A chip includes a substrate; macros placed on the substrate, which has a placement region being divided into sub-regions according to locations of the macros; and one or more vertical power stripes (VPSs) disposed in each sub-region. At least one VPS is not aligned with the VPSs of an adjacent higher or lower sub-region.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: June 29, 2021
    Assignees: NCKU Research and Development Foundation, Himax Technologies Limited
    Inventors: Jai-Ming Lin, Jhih-Sheng Syu, Bo-Yuan Huang
  • Patent number: 11050431
    Abstract: A single-ended successive approximation register (SAR) analog-to-digital converter (ADC) includes a first digital-to-analog converter (DAC) having a first capacitor associated with a most significant bit (MSB) of the output code, and a second capacitor associated with other bit or bits of the output code; and a second DAC having a first capacitor associated with a MSB of the output code, and a second capacitor associated with other bit or bits of the output code. A bottom plate of the first capacitor of the second DAC is connected to a negative reference voltage in all phases.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: June 29, 2021
    Assignees: NCKU Research and Development Foundation, Himax Technologies Limited
    Inventors: Chao-Hsien Ma, Soon-Jyh Chang, Hao-Sheng Wu
  • Patent number: 11034108
    Abstract: An imprinting method, which includes following steps. A workpiece is conveyed to a working region by a first conveyer unit. The workpiece is imprinted in the working region through an imprinting segment of a flexible imprinting mold film. The flexible imprinting mold film is driven by a driving roller set, such that at least another one of the imprinting segments of the flexible imprinting mold film rolled around the driving roller set is expanded from the driving roller set and moved to the working region.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: June 15, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Chin-Der Lee, Han-Yi Kuo, Jui-Pin Tsai
  • Publication number: 20210170638
    Abstract: A mold separation method includes the following steps: providing a mold separation device including a carrying mechanism, a scraping mechanism, and two separation mechanisms, wherein the scraping mechanism is disposed at an edge of the carrying mechanism, and the separation mechanisms are disposed at the edge of the carrying mechanism and are located on two opposite sides of the scraping mechanism; placing a first mold and a second mold bonded to the first mold on the carrying mechanism; causing the scraping mechanism to scrape off a spilled glue produced when the first mold is bonded to the second mold; and after scraping off the spilled glue, causing the separation mechanisms to pull open the first mold and the second mold so that the first mold and the second mold are separated from each other.
    Type: Application
    Filed: February 22, 2021
    Publication date: June 10, 2021
    Applicant: HIMAX TECHNOLOGIES LIMITED
    Inventor: Jui-Tang Chang
  • Patent number: RE48678
    Abstract: A display and an operating method thereof are provided. The display includes a display panel, a timing controller, and a plurality of source drivers. The timing controller has a plurality of signal output terminals. The source drivers are coupled to the timing controller and the display panel. The timing controller outputs a plurality of training packets to the source drivers. When the source drivers lock a clock of the timing controller according to the training packets, the timing controller outputs a plurality of control packets and a plurality of color data packets to the source drivers. The source drivers respectively output a plurality of pixel voltages corresponding to the color data packets to the display panel according to the corresponding control packets. The training packets, the control packets, and the color data packets are serially transmitted to the source drivers via the signal output terminals.
    Type: Grant
    Filed: July 4, 2017
    Date of Patent: August 10, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventors: Hsin-Chia Su, Jia-Hao Wu, Chuan-Che Lee