Patents by Inventor Cheng-Che Tsai
Cheng-Che Tsai 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).
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Patent number: 11557054Abstract: A method for performing region-of-interest (ROI)-based depth detection with aid of a pattern-adjustable projector and associated apparatus are provided.Type: GrantFiled: June 24, 2021Date of Patent: January 17, 2023Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
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Publication number: 20220414912Abstract: A method for performing region-of-interest (ROI)-based depth detection with aid of a pattern-adjustable projector and associated apparatus are provided.Type: ApplicationFiled: June 24, 2021Publication date: December 29, 2022Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
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Publication number: 20220357148Abstract: A three-dimensional (3D) sensing system for determining a 3D profile of an object and a method are provided. The 3D sensing system includes a first light source, a liquid crystal lens, a light detector and a control circuit. The first light source is configured to emit polarized light with a polarization setting for projecting a structured light pattern on the object. The liquid crystal lens in a polarization state allows incident light with the polarization setting to pass through and block incident light without the polarization setting from passing through. The light detector is configured to detect light reflected from the object and passing through the liquid crystal lens. When the 3D sensing system is in a 3D mode, the control circuit is configured to turn on the first light source and control the liquid crystal lens to enter the polarization state.Type: ApplicationFiled: May 4, 2021Publication date: November 10, 2022Inventors: Wu-Feng Chen, Ching-Wen Wang, Cheng-Che Tsai, Hsueh-Tsung Lu
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Patent number: 11495174Abstract: A method and a display device are provided. The method includes: generating a plurality of timing control signals for controlling a plurality of LED driving circuits, wherein the plurality of timing control signals include a first timing control signal and a second timing control signal; allowing the first LED driving circuit to drive an Nth scan line of a first display region at a first driving timing through the first timing control signal; and allowing the second LED driving circuit to drive an Nth scan line of the second display region at a second driving timing that is different from the first driving timing through the second timing control signal.Type: GrantFiled: November 7, 2021Date of Patent: November 8, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Fu-Zhi Xiao, Ching-Wen Wang, Cheng-Che Tsai, Chao-Chen Huang
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Patent number: 11494926Abstract: A method for performing hybrid depth detection with aid of an adaptive projector and associated apparatus are provided. The method includes: utilizing an image processing circuit to obtain distance information; utilizing the image processing circuit to determine a distance range according to the distance information; utilizing the image processing circuit to perform projection type selection to determine at least one selected projection type corresponding to the distance range among multiple predetermined projection types; utilizing the adaptive projector to perform projection of the at least one selected projection type to capture at least one corresponding image with a camera, and utilizing the image processing circuit to perform depth detection according to corresponding image to generate depth map; and utilizing the image processing circuit to selectively output the depth map as resultant depth map or perform depth data combination to generate combined depth map as resultant depth map.Type: GrantFiled: July 1, 2021Date of Patent: November 8, 2022Assignees: HIMAX TECHNOLOGIES LIMITED, LIQXTAL TECHNOLOGY INC.Inventors: Biing-Seng Wu, Pen-Hsin Chen, Ching-Wen Wang, Cheng-Che Tsai, Hung-Shan Chen, Yi Hung, Ming-Syuan Chen, Hsueh-Tsung Lu, Wu-Feng Chen
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Patent number: 11493332Abstract: A three-dimensional (3D) sensing system for determining a 3D profile of an object and a method are provided. The 3D sensing system includes a liquid crystal lens, a structure light source and a control circuit. The structure light source is configured to emit a structure light pattern with a plurality of dots on the object through the liquid crystal lens. The control circuit is configured to control the liquid crystal lens to separate the plurality of dots under a separating mode, and the control circuit is configured to control the liquid crystal lens to overlap the plurality of dots under an overlapping mode.Type: GrantFiled: August 18, 2021Date of Patent: November 8, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
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Publication number: 20220335634Abstract: 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: ApplicationFiled: April 15, 2021Publication date: October 20, 2022Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
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Patent number: 11475581Abstract: 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 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 region of interest of the input image.Type: GrantFiled: March 17, 2021Date of Patent: October 18, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
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Publication number: 20220301201Abstract: 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 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 region of interest of the input image.Type: ApplicationFiled: March 17, 2021Publication date: September 22, 2022Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
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Publication number: 20220171067Abstract: A hybrid three-dimensional (3D) sensing system includes a structured-light (SL) projector that generates an emitted light with a predetermined light pattern; a time-of-flight (ToF) sensor that generates a ToF signal according to a reflected light from a surface of an object incident by the emitted light; a ToF depth processing device that generates a ToF depth image according to the ToF signal; a lookup table (LUT) that gives a gray level for each index value of a sum of accumulated charges of the ToF signal; and an SL depth processing device that generates an SL depth image according to the ToF signal; and a depth weighting device that generates a weighted depth image according to the ToF depth image and the SL depth image.Type: ApplicationFiled: November 30, 2020Publication date: June 2, 2022Inventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
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Publication number: 20220132006Abstract: A structured-light scanning system includes a structured-light source that generates an emitted polarized light with a predetermined pattern and a predetermined polarization, the emitted polarized light being then projected onto and reflected from a surface of an object, resulting in a reflected polarized light; a polarizer that lets the reflected polarized light pass through while blocking other lights with polarizations different from the predetermined polarization, thereby outputting a filtered polarized light; and an image sensor that detects the filtered polarized light.Type: ApplicationFiled: October 23, 2020Publication date: April 28, 2022Inventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
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Publication number: 20220132094Abstract: A structured-light scanning system includes a structured-light source that generates an emitted polarized light with a predetermined pattern and a predetermined polarization, the emitted polarized light being then projected onto and reflected from a surface of an object, resulting in a reflected polarized light; a polarization modulator that adjusts polarization state of the reflected polarized light, resulting in a modulated polarized light; a polarizer that lets the modulated polarized light pass through while blocking other lights with polarizations different from the predetermined polarization, thereby outputting a filtered polarized light; and an image sensor that detects the filtered polarized light.Type: ApplicationFiled: June 22, 2021Publication date: April 28, 2022Inventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
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Patent number: 11300255Abstract: A system of lighting for an artificial tree or other decoration that allows easy replacement of small sub-strings of luminaries. Each sub-string contains N luminaries, where N is an integer around 10, where the N luminaries are wired in series. Extender cables can be supplied that contain parallel splits so that the different sub-strings are operated in parallel. The extender cable can attach to a master power source that supplies the constant voltage needed to power each sub-string. The exact voltage is determined by the number N and by the voltage requirement for each of the luminaries. Each sub-string has a plug that mates with a receptacle on either an extender cable, or on the master power device. Single point failures only cause one sub-string to go dark. The physical arrangement with plugs and receptacles allows easy replacement of an individual sub-string that is dark because of a failed luminary.Type: GrantFiled: November 24, 2020Date of Patent: April 12, 2022Assignee: Evergreen Tree LimitedInventor: Cheng-che Tsai
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Patent number: 11297289Abstract: A structured light projector and a method for structured light projection are disclosed. The structured light projector includes a projection module, a processor. The projection module is configured to project an optical pattern onto a region of space, and includes a light source, a diffractive optical element and a liquid crystal lens. The light source is configured to generate a light beam. The diffractive optical element is configured to convert the light beam into the optical pattern. The liquid crystal lens is interposed between the light source and the diffractive optical element, and is configured to collimate the light beam. The processor is configured to generate a control signal depending on an environment temperature of the projection module for controlling the liquid crystal lens.Type: GrantFiled: October 14, 2020Date of Patent: April 5, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Hsueh-Tsung Lu, Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen
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Patent number: 11282467Abstract: A display device includes a display panel, a gate driving circuit and a source driving circuit. The display panel includes multiple sub-pixels arranged in multiple rows and multiple columns. Three first sub-pixels of the sub-pixels have different colors and constitute one pixel. The first sub-pixels are disposed in the same column. The gate driving circuit is electrically connected to multiple gate lines. The number of the gate lines is less than the number of the rows. Each of the gate lines corresponds to at least two of the rows. Each of the gate lines is electrically connected to at least two of the sub-pixels in each of the columns. The source driving circuit is electrically connected to multiple data lines. The number of the data lines is greater than the number of the columns. Each of the columns corresponds to at least two of the data lines.Type: GrantFiled: December 30, 2020Date of Patent: March 22, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Yi-Ping Tu, Ming-Hung Weng, Cheng-Che Tsai, Yao-Chieh Li
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Patent number: 11252386Abstract: A structured-light scanning system includes a plurality of switchable projectors that respectively generate emitted lights with a predetermined pattern, each switchable projector being capable of switchably generating either a two-dimensional (2D) emitted light or a three-dimensional (3D) emitted light; an optical alignment device that aligns the emitted lights to generate an aligned light, which is projected onto and reflected from a surface of an object, resulting in a reflected light; and an image sensor that detects the reflected light.Type: GrantFiled: October 23, 2020Date of Patent: February 15, 2022Assignee: Himax Technologies LimitedInventors: Wu-Feng Chen, Hsueh-Tsung Lu, Cheng-Che Tsai, Ching-Wen Wang
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Patent number: 11094268Abstract: 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: GrantFiled: August 12, 2020Date of Patent: August 17, 2021Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Wu-Feng Chen, Hsueh-Tsung Lu, Tsai-Hsing Chen, Cheng-Che Tsai
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Publication number: 20210203894Abstract: A structured light projector and a method for structured light projection are disclosed. The structured light projector includes a projection module, a processor. The projection module is configured to project an optical pattern onto a region of space, and includes a light source, a diffractive optical element and a liquid crystal lens. The light source is configured to generate a light beam. The diffractive optical element is configured to convert the light beam into the optical pattern. The liquid crystal lens is interposed between the light source and the diffractive optical element, and is configured to collimate the light beam. The processor is configured to generate a control signal depending on an environment temperature of the projection module for controlling the liquid crystal lens.Type: ApplicationFiled: October 14, 2020Publication date: July 1, 2021Inventors: Hsueh-Tsung LU, Ching-Wen WANG, Cheng-Che TSAI, Wu-Feng CHEN
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Patent number: 10996483Abstract: 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.Type: GrantFiled: December 24, 2019Date of Patent: May 4, 2021Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Ching-Wen Wang, Cheng-Che Tsai, Wu-Feng Chen, Yi-Hsiu Lin, Hsueh-Tsung Lu
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Publication number: 20210071826Abstract: A system of lighting for an artificial tree or other decoration that allows easy replacement of small sub-strings of luminaries. Each sub-string contains N luminaries, where N is an integer around 10, where the N luminaries are wired in series. Extender cables can be supplied that contain parallel splits so that the different sub-strings are operated in parallel. The extender cable can attach to a master power source that supplies the constant voltage needed to power each sub-string. The exact voltage is determined by the number N and by the voltage requirement for each of the luminaries. Each sub-string has a plug that mates with a receptacle on either an extender cable, or on the master power device. Single point failures only cause one sub-string to go dark. The physical arrangement with plugs and receptacles allows easy replacement of an individual sub-string that is dark because of a failed luminary.Type: ApplicationFiled: November 24, 2020Publication date: March 11, 2021Inventor: Cheng-che Tsai