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公开(公告)号：US11054849B2
公开(公告)日：2021-07-06
申请号：US16509514
申请日：2019-07-12
Applicant: HIMAX TECHNOLOGIES LIMITED
Inventor： Chia-Chu Chien
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.
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公开(公告)号：US11050431B1
公开(公告)日：2021-06-29
申请号：US16989284
申请日：2020-08-10
Inventor： Chao-Hsien Ma , Soon-Jyh Chang , Hao-Sheng Wu
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.
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公开(公告)号：US11048904B2
公开(公告)日：2021-06-29
申请号：US16592657
申请日：2019-10-03
Applicant: Himax Technologies Limited
Inventor： I-Lin Wu , Jia-Ming He , Yaw-Guang Chang
Abstract: A fingerprint sensor embedded in a flat-panel display includes photo sensors; select transistors that are correspondingly connected in series with the photo sensors respectively; switch transistors that are correspondingly connected in series with the select transistors respectively, but are correspondingly connected in parallel with the photo sensors respectively; and a detection circuit that detects a signal passing one turned-on select transistor.
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公开(公告)号：US10997941B1
公开(公告)日：2021-05-04
申请号：US16789393
申请日：2020-02-12
Applicant: HIMAX TECHNOLOGIES LIMITED
Inventor： Ching-Lun Chen
IPC: G09G5/00
Abstract: An ESL driver circuit to be coupled to a host circuit and an ESL panel includes an ESL driver and a controlling transistor. The ESL driver has a serial clock input coupled to the serial clock port of the ESL driver circuit, a serial data input coupled to the serial data port of the ESL driver circuit, a control input coupled to the control port of the ESL driver circuit, and a busy output. The controlling transistor has a control terminal coupled to the busy output of the ESL driver, a first terminal coupled to a supply voltage level via a resistor, and a second terminal coupled to a ground level, and is configured to receive the busy output of the ESL driver to generate a busy signal at the first terminal.
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公开(公告)号：US10996483B1
公开(公告)日：2021-05-04
申请号：US16726809
申请日：2019-12-24
Applicant: HIMAX TECHNOLOGIES LIMITED
Inventor： Ching-Wen Wang , Cheng-Che Tsai , Wu-Feng Chen , Yi-Hsiu Lin , Hsueh-Tsung Lu
Abstract: A structured light projector and a method for structured light projection are disclosed. The structured light projector includes a projection module, an image sensor and a processor. The projection module is configured to project an optical pattern onto a region of space. The image sensor is configured to capture an image by detecting the optical pattern projected onto the region of space. The processor is configured to calculate disparity information of the optical pattern projected onto the region of space from the captured image, and is configured to compensate for the disparity of depending on an environment temperature of the projection module.
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Patent Agency Ranking
公开(公告)号：US10992306B1
公开(公告)日：2021-04-27
申请号：US16807005
申请日：2020-03-02
Applicant: Himax Technologies Limited
Inventor： Chun Hung Wang
Abstract: A self-start-up control circuit adaptable to an oscillation circuit includes a state circuit that generates a reset signal according to a level of a control voltage for a voltage-controlled oscillator (VCO) of the oscillation circuit; and a start-up circuit that starts up the VCO by generating an enable signal according to the reset signal.
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公开(公告)号：US20210109559A1
公开(公告)日：2021-04-15
申请号：US16601523
申请日：2019-10-14
Applicant: HIMAX TECHNOLOGIES LIMITED
Inventor： Yu-Hsuan Liu
IPC: G05F3/24
Abstract: A bandgap voltage generating apparatus and an operation method thereof are provided. The bandgap voltage generating apparatus includes a bandgap circuit, a frequency dividing circuit, and a logic circuit. The bandgap circuit is configured to determine whether to generate a bandgap voltage based on an enable clock. The frequency dividing circuit is configured to divide an original clock to generate at least one divided clock. The logic circuit is coupled to the frequency dividing circuit and the bandgap circuit. The logic circuit uses at least one of the at least one divided clock to generate the enable clock for an enable terminal of the bandgap circuit.
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公开(公告)号：US10977775B2
公开(公告)日：2021-04-13
申请号：US16504308
申请日：2019-07-07
Applicant: HIMAX TECHNOLOGIES LIMITED
Inventor： Chin-Jung Tsai , Yu-Hsuan Chu , Cheng-Hung Chi , Ming-Shu Hsiao , Nai-Ting Chang , Yi-Nung Liu
Abstract: A depth decoding system and a method for rectifying a ground-truth image are introduced. The depth decoder system includes a projector, a camera, a processor and a decoder. The projector is configured to project a structural light pattern to a first reference plane and a second reference plane. The camera is configured to capture a first ground-truth image from the first reference plane and capture a second ground-truth image from the second reference plane. The processor is configured to perform a rectification operation to the first ground-truth image and the second ground-truth image to generate a rectified ground-truth image. The decoder is configured to generate a depth result according to the rectified ground-truth image.
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69.发明授权公开(公告)号：US10976857B1
公开(公告)日：2021-04-13
申请号：US16819156
申请日：2020-03-15
Applicant: HIMAX TECHNOLOGIES LIMITED
Inventor： Yaw-Guang Chang , Hui-Min Wang
IPC: G06F3/041 , G02F1/1333
Abstract: A method and apparatus for driving a touch display driver integrated circuit (TDDI) of a touch-sensitive display panel are provided. The method may include: in a display phase of the touch-sensitive display panel, utilizing a reference voltage generator to generate a reference voltage having a predetermined voltage level to be a common voltage of the touch-sensitive display panel, and utilizing a common voltage operational amplifier (OPAMP) to drive the common voltage to the TDDI IC through a common voltage path, for performing display control of the touch-sensitive display panel; and in a touch-sensing phase of the touch-sensitive display panel, utilizing a touch-sensing waveform generator to generate a touch-sensing waveform signal carrying at least one touch-sensing waveform, and utilizing the common voltage OPAMP to drive the touch-sensing waveform signal to the TDDI IC through the common voltage path, for performing touch-sensing control of the touch-sensitive display panel.
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公开(公告)号：US20210103713A1
公开(公告)日：2021-04-08
申请号：US16592657
申请日：2019-10-03
Applicant: Himax Technologies Limited
Inventor： I-Lin Wu , Jia-Ming He , Yaw-Guang Chang
Abstract: A fingerprint sensor embedded in a flat-panel display includes photo sensors; select transistors that are correspondingly connected in series with the photo sensors respectively; switch transistors that are correspondingly connected in series with the select transistors respectively, but are correspondingly connected in parallel with the photo sensors respectively; and a detection circuit that detects a signal passing one turned-on select transistor.
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