公开(公告)号：US20210011505A1

公开(公告)日：2021-01-14

申请号：US16509514

申请日：2019-07-12

Applicant: HIMAX TECHNOLOGIES LIMITED

Inventor： Chia-Chu Chien

IPC: G05F1/575

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.

公开(公告)号：US10831034B2

公开(公告)日：2020-11-10

申请号：US16252544

申请日：2019-01-18

Applicant: HIMAX TECHNOLOGIES LIMITED

Inventor： Cheng-Hung Chi

IPC: G02B27/09 ,  F21Y115/30 ,  F21V5/00 ,  G02B27/00

Abstract: An illumination device including a light source array and a diffractive optical element (DOE) is provided. The light source array includes a plurality of point light sources arranged in an array. The diffractive optical element includes a plurality of diffractive areas respectively aligned with the point light sources. The diffractive areas respectively diffract lights from the point light sources to an illuminated object, so as to superimpose the lights to form a uniform bright area on the illuminated object.

公开(公告)号：US10804917B1

公开(公告)日：2020-10-13

申请号：US16677494

申请日：2019-11-07

Applicant: NCKU Research and Development Foundation ,  Himax Technologies Limited

Inventor： Soon-Jyh Chang ,  Hao-Sheng Wu

IPC: H03M1/08 ,  H03M1/38 ,  H03M1/40 ,  H03M1/18

Abstract: A reference ripple suppression circuit adaptable to a successive approximation register (SAR) analog-to-digital converter (ADC) includes a plurality of code-dependent compensation cells, each including a logic circuit and a compensation capacitor. A first plate of the compensation capacitor is coupled to receive a reference voltage to be compensated, and a second plate of the compensation capacitor is coupled to receive an output of the logic circuit performing on an output code of the SAR ADC and at least one logic value representing a bottom-plate voltage of a switched digital-to-analog converter (DAC) of the SAR ADC. (k−1) of the code-dependent compensation cells are required maximally for k-th switching of the SAR ADC.

公开(公告)号：US20200312804A1

公开(公告)日：2020-10-01

申请号：US16365710

申请日：2019-03-27

Applicant: HIMAX TECHNOLOGIES LIMITED

Inventor： Pai-Sheng Cheng ,  Wen-Chieh Tu

IPC: H01L23/00 ,  H01L23/498 ,  H01L23/538 ,  H01L23/10

Abstract: A flip chip package includes a substrate, a chip body bonding on the substrate and bumps connected between the chip body and the substrate. The substrate includes input wires and output wires. The chip body includes a first package unit including a first seal ring and first pads and a second package unit including a second seal ring and second pads. The chip body extends continuously between the first seal ring and the second seal ring. Each of the input wires has one end overlapping the chip body and the other end positioned at a first bonding region of the substrate. Each of the output wires has one end overlapping the chip body and the other end positioned at a second bonding region of the substrate. The first bonding region and the second bonding region are located at opposite sides of the chip body.

公开(公告)号：US10777121B1

公开(公告)日：2020-09-15

申请号：US16690147

申请日：2019-11-21

Applicant: HIMAX TECHNOLOGIES LIMITED

Inventor： Chi-Hung Liao ,  Chang-Lung Wu ,  Jen-Chun Peng ,  Huan-Sen Liao ,  Kuo-Tung Hsu ,  Wei-Jen Chang

IPC: G09G3/22 ,  H02M3/156

Abstract: The present invention provides a protection circuit and related operation control method to enable the PFM circuit when the operating duration of the PFM circuit is not greater than a first threshold, and disables the PFM circuit when a rest duration of the PFM circuit is not greater than a second threshold. The present invention further provides a protection circuit and related operation control method to avoid starting excessive vertical scanning operations within one frame scanning period by masking one of the gate scanning start signal STV, the gate clock signal CKV and the gate discharge signal OEV. The present invention further provides a protection circuit and related operation control method to disable the gate scanning start signal STV when the number of clock cycles is not equal to a target number of clock cycles, which protects the gate driver from overload.

公开(公告)号：US10761337B2

公开(公告)日：2020-09-01

申请号：US16111231

申请日：2018-08-24

Applicant: HIMAX TECHNOLOGIES LIMITED

Inventor： Cheng-Hung Chi

IPC: G02B27/42 ,  G02B27/30

Abstract: The present invention provides a projecting apparatus. The projecting apparatus comprises: a light source, a lens, and a diffractive optical element (DOE). The light source is utilized for emitting a Gaussian beam. The lens has a focal length, and is utilized for receiving the Gaussian beam and generating a de-focused Gaussian beam, wherein a distance between the light source and the lens is not equal to the focal length. The DOE is designed for the de-focused Gaussian beam, and utilized for receiving the de-focused Gaussian beam and spreading out a non-diffracted light of the de-focused Gaussian beam.

公开(公告)号：US10714003B1

公开(公告)日：2020-07-14

申请号：US16239477

申请日：2019-01-03

Applicant: HIMAX TECHNOLOGIES LIMITED

Inventor： Tung-Ying Wu

IPC: G09G3/3225 ,  G06T5/00 ,  G06T5/40 ,  H01L27/32

Abstract: An image processing system comprising: a gray level analyzing circuit, configured to analyze a gray level distribution of an input image and to calculate quantities for pixels having different gray levels in the input image; and a processor, coupled to the gray level analyzing circuit, configured to set first pixel gains for the pixels according to the gray levels and the quantities, and to process the input image with the first pixel gains to generate an output image.

公开(公告)号：US10712886B2

公开(公告)日：2020-07-14

申请号：US16152427

申请日：2018-10-05

Applicant: HIMAX TECHNOLOGIES LIMITED

Inventor： Cheng-Hung Tsai ,  Ying-Zhuan Liu ,  Xue-Xia Cai ,  Yuan-Ting Chen ,  Jui-Ni Li ,  Wai-Pan Wu ,  Shen-Feng Tai

IPC: G09G5/00 ,  G06F3/044 ,  G06F3/041

Abstract: A sensing unit in the touch panel includes a first electrode formed in a first film and a second electrode formed in a second film. The first electrode includes multiple extending portions and at least one connecting portion. The extending portions extend along a first direction. The connecting portion extends along a second direction which is different from the first direction. The extending portions are spaced from each other by a distance along the second direction, and the connecting portion connects the extending portions. The second electrode includes a circular pad having an opening. The extending portions at least partially overlap with the circular pad, and the connecting portion is formed in an area overlapping with the opening.

公开(公告)号：US10684731B2

公开(公告)日：2020-06-16

申请号：US15667636

申请日：2017-08-03

Applicant: HIMAX TECHNOLOGIES LIMITED

Inventor： Wei-Song Wang ,  Yaw-Guang Chang

IPC: G06F3/044 ,  G06F3/041

Abstract: A touch apparatus and a sensing method and a touch sensing circuit thereof are provided. The touch apparatus includes a touch panel and the touch sensing circuit. In a first period, the touch sensing circuit applies the same driving signal to a plurality of sensing electrodes of the touch panel at the same time, and performs self-capacitance touch detection on the sensing electrodes to obtain a self-capacitance detection result. In a second period, the touch sensing circuit performs mutual-capacitance touch detection on at least one of the sensing electrodes to obtain a mutual-capacitance detection result. The touch sensing circuit determines whether a touch event of the touch panel is triggered by water based on the mutual-capacitance detection result and the self-capacitance detection result.

公开(公告)号：US20200152146A1

公开(公告)日：2020-05-14

申请号：US16398296

申请日：2019-04-30

Applicant: HIMAX TECHNOLOGIES LIMITED

Inventor： Wei-Hsien Yeh

IPC: G09G3/36

Abstract: A liquid crystal display device is provided. A sub-pixel unit includes a liquid crystal capacitor, a storage circuit, and a switching circuit. The storage circuit is configured to store, in a scanning period of the frame period, a data driving signal provided by a data line and provide the data driving signal to the liquid crystal capacitor in a display period of the frame period. The switching circuit is configured to be turned on in the scanning period to provide a reference voltage to the liquid crystal capacitor.