Patents by Inventor Chung-Wen Chang
Chung-Wen Chang 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: 11955469Abstract: A micro LED display panel includes a blue LED layer, a green LED layer, and a red LED layer. The blue LED layer, the green LED layer, and the red LED layer are in a stacked formation. The blue, the green, and the red LED layers each include a plurality of micro LEDs spaced apart from each other. The composition of the layers is such that light emitted from all but the bottom layer is able to pass through transparent material in other layers before exiting the panel and being viewed.Type: GrantFiled: June 17, 2021Date of Patent: April 9, 2024Assignee: HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Wei-Chih Chang, Chung-Wen Lai
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Patent number: 11494038Abstract: A touch panel includes a cover lens located at top of the touch panel, plural touch sensor units, and plural sensing channels. The touch sensor units are disposed below the cover lens and arranged in rows and columns. The touch sensor units are disposed on the sensing channels. Each of touch sensor units acquires a sensing magnitude for identifying a position of the cover lens that touched by the stylus according to signals outputted by the sensing channels. The sensing magnitude of one of the touch sensor units is composed of the signals of the adjacent sensing channels located within a vertical projection of the one of the touch sensor units.Type: GrantFiled: September 20, 2020Date of Patent: November 8, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Yaw-Guang Chang, Hui-Min Wang, Cheng-Hung Tsai, Chung-Wen Chang
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Patent number: 11467690Abstract: A touch-and-display device operated with an active stylus is provided. A touch position is detected in a touch detection period. An uplink signal is transmitted and a downlink signal is detected in a stylus detection period. When the downlink signal is detected, it is determined if a distance between a stylus position and the touch position is less than or equal to a first predetermined distance. A stylus mode is not entered if the determination result is affirmative.Type: GrantFiled: September 29, 2021Date of Patent: October 11, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Chung-Wen Chang, Fong Wei Yang, Ming-Kai Cheng, Wen-Sen Su, Shen-Feng Tai
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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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Electronic device control method and electronic device applying the electronic device control method
Patent number: 11282475Abstract: An electronic device control method applied to an electronic device can operate in a display mode and a touch sensing mode. The method comprises: (a) controlling the electronic device to have a first mode switch frequency; and (b) controlling the electronic device to have a second mode switch frequency different from the first mode switch frequency. The first mode switch frequency and the second mode switch frequency are frequencies for switching between the display mode and the touch sensing mode.Type: GrantFiled: July 23, 2019Date of Patent: March 22, 2022Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Chih-Ming Wu, Yaw-Guang Chang, Chin-Jung Chen, Yu-Feng Lin, Chung-Wen Chang -
Publication number: 20210240288Abstract: A touch panel includes a cover lens located at top of the touch panel, plural touch sensor units, and plural sensing channels. The touch sensor units are disposed below the cover lens and arranged in rows and columns. The touch sensor units are disposed on the sensing channels. Each of touch sensor units acquires a sensing magnitude for identifying a position of the cover lens that touched by the stylus according to signals outputted by the sensing channels. The sensing magnitude of one of the touch sensor units is composed of the signals of the adjacent sensing channels located within a vertical projection of the one of the touch sensor units.Type: ApplicationFiled: September 20, 2020Publication date: August 5, 2021Inventors: Yaw-Guang CHANG, Hui-Min WANG, Cheng-Hung TSAI, Chung-Wen CHANG
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ELECTRONIC DEVICE CONTROL METHOD AND ELECTRONIC DEVICE APPLYING THE ELECTRONIC DEVICE CONTROL METHOD
Publication number: 20210027740Abstract: An electronic device control method applied to an electronic device can operate in a display mode and a touch sensing mode. The method comprises: (a) controlling the electronic device to have a first mode switch frequency; and (b) controlling the electronic device to have a second mode switch frequency different from the first mode switch frequency. The first mode switch frequency and the second mode switch frequency are frequencies for switching between the display mode and the touch sensing mode.Type: ApplicationFiled: July 23, 2019Publication date: January 28, 2021Inventors: Chih-Ming Wu, Yaw-Guang Chang, Chin-Jung Chen, Yu-Feng Lin, Chung-Wen Chang -
Patent number: 10558306Abstract: A water mode detection method includes: operating a normal touch detection operation on each of a plurality of touch detection unit groups during each of a plurality of normal scan periods to obtain a first detection result; operating a dummy touch detection operation on a first touch detection group of the touch detection unit groups to obtain a second detection result during a dummy scan period, and setting a common voltage of a second touch detection group of a plurality of non-scanned touch detection unit groups to a reference ground during the dummy touch detection operation; and generating a water mode detection result according to the first detection result and the second detection result.Type: GrantFiled: June 12, 2017Date of Patent: February 11, 2020Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Fong-Wei Yang, Chun-Kai Chuang, Chih-Chen Tsai, Chung-Wen Chang
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Publication number: 20180356931Abstract: A water mode detection method includes: operating a normal touch detection operation on each of a plurality of touch detection unit groups during each of a plurality of normal scan periods to obtain a first detection result; operating a dummy touch detection operation on a first touch detection group of the touch detection unit groups to obtain a second detection result during a dummy scan period, and setting a common voltage of a second touch detection group of a plurality of non-scanned touch detection unit groups to a reference ground during the dummy touch detection operation; and generating a water mode detection result according to the first detection result and the second detection result.Type: ApplicationFiled: June 12, 2017Publication date: December 13, 2018Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Fong-Wei Yang, Chun-Kai Chuang, Chih-Chen Tsai, Chung-Wen Chang
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Patent number: 9582109Abstract: A method for detecting noise of a touch panel and performing signal control is provided, where the method may determine how many cycles of frame data are influenced by noise, may determine whether the frame data is influenced by noise by determining whether a number of cycles influenced by noise is greater than a first threshold value or not, and may determine whether a number of continuous frame data determined to be influenced by noise is greater than a second threshold value to generate a determination result. Finally, the method may determine whether to adjust a frequency of the transmitting signals according to the determination result.Type: GrantFiled: September 30, 2013Date of Patent: February 28, 2017Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Li-Lin Liu, Chung-Wen Chang, Shen-Feng Tai, Jui-Min Liu
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Patent number: 9310945Abstract: A touch-sensing display device comprises a plurality of row electrodes and column electrodes, a capacitance detector, detecting first capacitance-variation values of the row electrodes and second capacitance-variation values of the column electrodes, and detecting third capacitance-variation values of each intersection of the row electrodes and the column electrodes. The processor counts the first number of the first and second capacitance-variation values, exceeding a first threshold, counts the second number of the first and second capacitance-variation values up to a maximum capacitor-variation value, and counts the third number of the third capacitance values, exceeding a second threshold. The processor makes the touch-sensing display device enter a bending mode when the first and second numbers are over a first predetermined number and a second predetermined number respectively, and the third number is below the first number.Type: GrantFiled: October 15, 2013Date of Patent: April 12, 2016Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Jui-Ming Liu, Li-Lin Liu, Chung-Wen Chang, Shen-Feng Tai
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Patent number: 9262009Abstract: A touch device and method for detecting a touch point thereof are provided. The method includes: detecting a plurality of first touch values, second touch values and third touch values corresponding to a plurality of touch regions of a touch panel, respectively, during a first frame period, a second frame period and a third frame period; performing a value obtaining operation to output a median of the first touch value, the second touch value and the third touch value to which each of the touch regions correspond; and determining a real touch point according a touch threshold and the first touch values, the second touch values and the third touch values outputted by the value obtaining operation.Type: GrantFiled: June 8, 2012Date of Patent: February 16, 2016Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Jui-Ming Liu, Li-Lin Liu, Chung-Wen Chang, Shen-Feng Tai
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Patent number: 9244579Abstract: A touch display apparatus and a touch mode switching method thereof are provided. A touch mode of a touch panel is switched according to a touch track and a touch area of an input tool.Type: GrantFiled: December 18, 2013Date of Patent: January 26, 2016Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Li-Lin Liu, Shen-Feng Tai, Chung-Wen Chang, Jui-Min Liu
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Patent number: 9104265Abstract: A touch device and an operating method thereof are provided. The operating method includes the following steps. A plurality of data baseline values of the touch panel is calibrated and set during an initialization of a touch panel. A plurality of touch data is obtained after scanning the touch panel. A plurality of touch values corresponding to the touch panel is calculated according to the data baseline values and the touch data. A touch point is detected according to the touch values. When the touch data is complied with a re-calibration requirement, the data baseline values are re-calibrated and reset.Type: GrantFiled: June 8, 2012Date of Patent: August 11, 2015Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Jui-Ming Liu, Li-Lin Liu, Chung-Wen Chang, Shen-Feng Tai
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Publication number: 20150169102Abstract: A touch display apparatus and a touch mode switching method thereof are provided. A touch mode of a touch panel is switched according to a touch track and a touch area of an input tool.Type: ApplicationFiled: December 18, 2013Publication date: June 18, 2015Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Li-Lin Liu, Shen-Feng Tai, Chung-Wen Chang, Jui-Min Liu
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Publication number: 20150103031Abstract: A touch-sensing display device comprises a plurality of row electrodes and column electrodes, a capacitance detector, detecting first capacitance-variation values of the row electrodes and second capacitance-variation values of the column electrodes, and detecting third capacitance-variation values of each intersection of the row electrodes and the column electrodes. The processor counts the first number of the first and second capacitance-variation values, exceeding a first threshold, counts the second number of the first and second capacitance-variation values up to a maximum capacitor-variation value, and counts the third number of the third capacitance values, exceeding a second threshold. The processor makes the touch-sensing display device enter a bending mode when the first and second numbers are over a first predetermined number and a second predetermined number respectively, and the third number is below the first number.Type: ApplicationFiled: October 15, 2013Publication date: April 16, 2015Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Jui-Ming Liu, Li-Lin Liu, Chung-Wen Chang, Shen-Feng Tai
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Publication number: 20150091814Abstract: A method for detecting noise of a touch panel and performing signal control is provided, where the method may determine how many cycles of frame data are influenced by noise, may determine whether the frame data is influenced by noise by determining whether a number of cycles influenced by noise is greater than a first threshold value or not, and may determine whether a number of continuous frame data determined to be influenced by noise is greater than a second threshold value to generate a determination result. Finally, the method may determine whether to adjust a frequency of the transmitting signals according to the determination result.Type: ApplicationFiled: September 30, 2013Publication date: April 2, 2015Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Li-Lin Liu, Chung-Wen Chang, Shen-Feng Tai, Jui-Min Liu
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Patent number: 8988378Abstract: A touch device and a driving method thereof are provided. A scanning line driving frequency of the touch device is switched according to a plurality of preset driving frequency setting data groups, so as to prevent misjudgment of a touched position caused by electromagnetic noise.Type: GrantFiled: November 26, 2012Date of Patent: March 24, 2015Assignee: Himax Technologies LimitedInventors: Jui-Ming Liu, Li-Lin Liu, Chung-Wen Chang, Shen-Feng Tai
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Publication number: 20150062058Abstract: A touch panel capable of detecting a stylus is disclosed. At least one self scan cycle and at least one mutual scan cycle are performed in each scan frame, and touch identification of the stylus is affirmed when both touch identifications via the self scan cycle and the mutual scan cycle are detected.Type: ApplicationFiled: September 3, 2013Publication date: March 5, 2015Applicant: Himax Technologies LimitedInventors: Chung-Wen Chang, Shen-Feng Tai, Jui-Min Liu, Chun-Kai Chuang
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Publication number: 20150042596Abstract: A touch panel capable of performing proximity function is disclosed. A voltage is applied to column electrode or row electrode during a self scan cycle, and a capacitive object close to a surface of the touch panel is measured on the same column electrode or row electrode. A voltage is applied to one axis during a mutual scan cycle, and a capacitive object close to the surface of the touch panel is measured on the other axis.Type: ApplicationFiled: August 8, 2013Publication date: February 12, 2015Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Chung-Wen Chang, Shen-Feng Tai, Jui-Min Liu, Li-Lin Liu