Patents Assigned to Himax Technologies Limited
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Patent number: 11393375Abstract: A source driver and a polarity inversion control circuit are provided. The source driver includes a plurality of channel pairs and the polarity inversion control circuit. The polarity inversion control circuit includes a signal generating circuit and a routing circuit. The signal generating circuit generates a polarity control signal. The routing circuit outputs a plurality of switching control signals corresponding to the polarity control signal to a plurality of output switching circuits of the channel pairs. The routing circuit changes the correspondence between the polarity control signal and the switching control signals according to a polarity inversion configuration signal.Type: GrantFiled: September 30, 2020Date of Patent: July 19, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Siangwei Wang, Hung-Yu Huang
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Patent number: 11386859Abstract: A polarity compensation device and a polarity compensation method are provided. The polarity compensation device includes a variance calculation circuit and a compensation calculation circuit. The variance calculation circuit calculates a difference value between current sub-pixel data and previous sub-pixel data in the same frame period, wherein the current sub-pixel data and the previous sub-pixel data belong to the same data line of a display panel. The compensation calculation circuit converts the difference value into a function value. The compensation calculation circuit decides to increase or decrease the current sub-pixel data by the function value according to a polarity corresponding to the same frame period, so as to generate compensated sub-pixel data.Type: GrantFiled: November 18, 2020Date of Patent: July 12, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventor: Tung-Ying Wu
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Patent number: 11380126Abstract: A display device is disclosed, which includes a display panel and a detection circuit. The display panel has pixels configured to display an image. The pixels include display and photo sensing pixels that are arranged in sensing channels. Each display and photo sensing pixel includes a display region and a photo sensing region. The display region emits light. The photo sensing region detects the light emitted by the display region and reflected from a biometric object and to convert the reflected light into photo detection signals. The detection circuit has differential signal processing circuitries that are coupled to the photo sensing regions of the display and photo sensing pixels. Each differential signal processing circuitry performs a differential operation on the photo detection signals of adjacent two of the sensing channels to generate a difference signal that is used to construct a biometric pattern corresponding to the biometric object.Type: GrantFiled: February 4, 2021Date of Patent: July 5, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Zong-You Hou, Yaw-Guang Chang, Jia-Ming He, Wei-Hsien Yeh
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Patent number: 11380128Abstract: An apparatus integrated with fingerprint recognition and touch detection is provided. The apparatus includes a touchpad and a controller IC. The touchpad has a touch area for recognizing a touch event and a fingerprint area for recognizing a fingerprint and the touch event. The fingerprint area includes TX lines of a first group crossing RX lines of a first group. The touch area includes TX lines of the first group and a second group crossing RX lines of the first group and a second group. When the apparatus is operated in a fingerprint sensing mode, the controller IC supplies a driving signal to the TX lines of the first group. When the apparatus is operated in a touch sensing mode, the controller IC supplies the driving signal to the TX lines of the second group and a portion of the TX lines of the first group.Type: GrantFiled: June 21, 2020Date of Patent: July 5, 2022Assignee: Himax Technologies LimitedInventors: Yaw-Guang Chang, Jia-Ming He
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Publication number: 20220208135Abstract: The invention provides a driving circuit of a display panel and an operation method thereof. The driving circuit includes a calculation circuit and an edge processing circuit. The calculation circuit converts original image frame data into first image frame data for driving a first pixel array layer and second image frame data for driving a second pixel array layer. The edge processing circuit converts the second image frame data into third image frame data. The edge processing circuit performs an edge detection on a current pixel in the second image frame data to determine whether the current pixel belongs to an image edge. The edge processing circuit determines whether to adjust a gray level of an adjacent pixel in the second image frame data as the gray level of the adjacent pixel in the third image frame data according to a result of the edge detection.Type: ApplicationFiled: December 29, 2020Publication date: June 30, 2022Applicant: HIMAX TECHNOLOGIES LIMITEDInventor: Tung-Ying Wu
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Patent number: 11372250Abstract: A head-mounted display including a display module is provided. The display module includes a light source configured to provide a light beam and a combiner disposed on a transmission path of the light beam. The combiner includes a plurality of reflective elements spaced apart from each other and obliquely disposed. A maximum width of each of the plurality of reflective elements along an oblique direction thereof is less than 4 mm and greater than 10 ?m.Type: GrantFiled: August 5, 2020Date of Patent: June 28, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Jiun-Yi Lien, Bo-Han Lyu, Meng-Ko Tsai, Yin-Tung Lu
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Patent number: 11361545Abstract: A monitoring device and an operation method thereof are provided to detect whether an object of interest appears in a video stream. The monitoring device includes a motion calculation circuit, a motion region determination circuit and a computing engine. The motion calculation circuit performs motion calculation on a current frame in the video stream to generate a motion map. The motion region determination circuit determines a motion region in the current frame according to the motion map. The motion region determination circuit notifies the computing engine with the motion region in the current frame. The computing engine performs an object of interest detection on the motion region in the current frame of the video stream to generate a detection result. The motion region determination circuit determines whether to ignore the motion region in a subsequent frame after the current frame according to the detection result.Type: GrantFiled: November 20, 2020Date of Patent: June 14, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Chin-Kuei Hsu, Ti-Wen Tang
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Patent number: 11353988Abstract: A touch display apparatus is disclosed, which includes a touch display panel and a driving circuit. The touch display panel is configured for display and touch sensing, which includes plural touch sensing pads arranged in touch sensing groups. The driving circuit is coupled to the touch display panel, and is configured to drive the touch display panel to perform display with respect to common voltage signal at a display stage of a frame period and to drive the touch display panel to perform touch sensing by applying a touch detection signal to all of the touch sensing pads simultaneously at a touch sensing stage of the frame period.Type: GrantFiled: February 19, 2021Date of Patent: June 7, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Chin-Yuan Chiang, Ho-Chia Hung, Li-Lin Liu, Chung-Wen Chang, Shen-Feng Tai
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Publication number: 20220164579Abstract: A monitoring device and an operation method thereof are provided to detect whether an object of interest appears in a video stream. The monitoring device includes a motion calculation circuit, a motion region determination circuit and a computing engine. The motion calculation circuit performs motion calculation on a current frame in the video stream to generate a motion map. The motion region determination circuit determines a motion region in the current frame according to the motion map. The motion region determination circuit notifies the computing engine with the motion region in the current frame. The computing engine performs an object of interest detection on the motion region in the current frame of the video stream to generate a detection result. The motion region determination circuit determines whether to ignore the motion region in a subsequent frame after the current frame according to the detection result.Type: ApplicationFiled: November 20, 2020Publication date: May 26, 2022Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Chin-Kuei Hsu, Ti-Wen Tang
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Publication number: 20220157270Abstract: A polarity compensation device and a polarity compensation method are provided. The polarity compensation device includes a variance calculation circuit and a compensation calculation circuit. The variance calculation circuit calculates a difference value between current sub-pixel data and previous sub-pixel data in the same frame period, wherein the current sub-pixel data and the previous sub-pixel data belong to the same data line of a display panel. The compensation calculation circuit converts the difference value into a function value. The compensation calculation circuit decides to increase or decrease the current sub-pixel data by the function value according to a polarity corresponding to the same frame period, so as to generate compensated sub-pixel data.Type: ApplicationFiled: November 18, 2020Publication date: May 19, 2022Applicant: HIMAX TECHNOLOGIES LIMITEDInventor: Tung-Ying Wu
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Patent number: 11334187Abstract: A display and touch driver system including a plurality of display and touch drivers and a wire circuit is provided. The plurality of display and touch drivers are connected in cascade. The plurality of display and touch drivers are configured to synchronously drive a display and touch panel to perform a touch sensing operation. Each of the display and touch drivers includes an operational amplifier. The operational amplifier includes a first stage and a second stage. An output node of the first stage is coupled to an input node of the second stage. The output nodes of the first stages of the operational amplifiers are connected together via the wire circuit.Type: GrantFiled: March 30, 2021Date of Patent: May 17, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Yi Chen Tzung, Yaw-Guang Chang
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Patent number: 11327604Abstract: A touch sensing circuit for use in a touch sensitive device includes: an integrator, a first switching unit and a control signal generator. The integrator, coupled to at least one sensing electrode of a touch panel in the touch sensitive device, and arranged to collect charges on the at least one sensing electrode and accordingly generate an output sensed signal. The first switching unit is arranged to selectively couple a first end of the at least one sensing electrode to a reference voltage level according to a first mask signal. The control signal generator is arranged to generate the first mask signal according to a synchronization signal of a display panel in the touch sensitive device, wherein the first switching unit couples the first end of the at least one sensing electrode to the reference voltage level when the synchronization signal is asserted.Type: GrantFiled: September 7, 2020Date of Patent: May 10, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Jia-Ming He, Yaw-Guang Chang, Yu-Chun Lin, Yi-Yang Tsai
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Patent number: 11322080Abstract: An image display system includes a motion detection device that detects motion of an object in an input image; and a black data insertion device that inserts black data in one frame of the input image, thereby generating an output image. A duty cycle of the inserted black data in the frame is changed according to a result of the motion detection device.Type: GrantFiled: November 30, 2020Date of Patent: May 3, 2022Assignee: Himax Technologies LimitedInventor: Tung Ying Wu
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Patent number: 11323034Abstract: A voltage generating circuit includes an input stage, a control stage, an inductor and an output stage. The input stage includes a plurality of comparators each generating a comparison result according to an input voltage and a reference voltage and a multiplexer configured to output a voltage control signal sequentially carrying the comparison results of the comparators. The control stage is configured to control conduction of a charging path between a power source and a first node in response to the voltage control signal. The inductor is coupled between the first node and a second node. The output stage includes a plurality of output switches coupled to the second node and turned on or off in response to a switch control signal. The switch control signals are generated according to the voltage control signal and rising edges and falling edges of the switch control signals are interleaved.Type: GrantFiled: March 3, 2020Date of Patent: May 3, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventor: Yu-Hsuan Liu
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Patent number: 11320851Abstract: An all-MOSFET voltage reference circuit includes a first cascaded branch configured to generate a bias current and composed of a first current source and a diode-connected first N-type transistor connected at a first interconnected node; a second cascaded branch composed of a second current source, a diode-connected second N-type transistor and a third N-type transistor connected with the second N-type transistor disposed in between, wherein the second N-type transistor and the third N-type transistor are connected at a second interconnected node; a third cascaded branch composed of a third current source and a diode-connected fourth N-type transistor connected at an output node that provides a reference voltage; and an amplifier with a non-inverting node coupled to the first interconnected node and an inverting node coupled to the second interconnected node. A threshold voltage of the third N-type transistor is larger than a threshold voltage of the second N-type transistor.Type: GrantFiled: December 2, 2020Date of Patent: May 3, 2022Assignees: NCKU Research and Development Foundation, Himax Technologies LimitedInventors: Wei-Ting Yeh, Chien-Hung Tsai
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Publication number: 20220120958Abstract: A method to form a light wave-guide optical element is disclosed. First, a flat organic optical layer is formed on an optically transparent substrate before using a template to transfer a pattern onto the flat organic optical layer to obtain a patterned organic optical layer. Then the patterned organic optical layer is cured in the presence of the template to obtain an organic optical material disposed on the optically transparent substrate before removing the template from the organic optical material. Later an anti-reflection stack is formed to conformally cover the organic optical material before applying an organic optical cover layer on the anti-reflection stack to cover the anti-reflection stack.Type: ApplicationFiled: January 3, 2022Publication date: April 21, 2022Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Yin-Dong Lu, Han-Yi Kuo, Han-Ching Lin
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Publication number: 20220123160Abstract: A sensor device provided in the disclosure includes a sensor substrate, a first transparent layer, a collimator layer, and a lens. The first transparent layer is disposed on the sensor substrate, wherein the first transparent layer defines an alignment structure. The collimator layer is disposed on the first transparent layer. The lens is disposed on the collimator layer.Type: ApplicationFiled: December 29, 2021Publication date: April 21, 2022Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Yu-Jui Hsieh, Po-Nan Chen, Ya-Jing Yang
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Publication number: 20220109821Abstract: The present invention provides a projector including a laser module and a lens module, wherein the lens module includes a plurality of lens and a plurality of diffractive optical elements. In the operations of the projector, the laser module is arranged to generate at least one laser beam; each of the lenses is arranged to receive one of the at least one laser beam to generate a collimated laser beam; and the diffractive optical elements correspond to the lenses, respectively, and each of the diffractive optical elements is arranged to receive the collimated laser beam from the corresponding lens to generate an image. The images generated by the diffractive optical elements form a projected image of the projector. By using the projector of the present invention, the projected image may have higher resolution or field of view that is advantageous for the 3D sensing system.Type: ApplicationFiled: December 15, 2021Publication date: April 7, 2022Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Biing-Seng Wu, Han-Yi Kuo, Bo-Han Lyu, Yin-Dong Lu, Kuan-Ming Chen, Meng-Ko 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: 11294500Abstract: A touch panel for sensing a fingerprint/touch input and a display device using the same are provided. The display device includes a display panel and the touch panel. The touch panel includes drive line groups and sense line groups. Each of the drive line groups includes a drive line. Each of the sense line groups includes sense lines. A distance between adjacent two of the drive/sense line groups in a fingerprint recognition area is smaller than that between adjacent two of the drive/sense line groups in a portion of a touch control area other than the fingerprint recognition area. A distance between adjacent two of the sense lines in the fingerprint recognition area is designed to be equal a sub-pixel width, and a distance between adjacent two of the drive lines in the fingerprint recognition area is designed to be equal a sub-pixel length.Type: GrantFiled: September 1, 2020Date of Patent: April 5, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Jia-Ming He, Yaw-Guang Chang