Patents by Inventor Wu Chang
Wu 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: 11916282Abstract: An antenna apparatus includes a feeding antenna inside an electronic device and one or more antenna elements, such as a floating metal antenna, disposed on a rear cover of the electronic device. The floating metal antenna and a feeding antenna inside the electronic device may form a coupling antenna structure. The feeding antenna may be an antenna fastened on an antenna support (which may be referred to as a support antenna). The feeding antenna may alternatively be a slot antenna formed by slitting on a metal middle frame of the electronic device. The antenna apparatus may be implemented in limited design space, thereby effectively saving antenna design space inside the electronic device. The antenna apparatus may generate excitation of a plurality of resonance modes, so that antenna bandwidth and radiation characteristics can be improved.Type: GrantFiled: November 5, 2019Date of Patent: February 27, 2024Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Pengfei Wu, Chien-Ming Lee, Dong Yu, Chih Yu Tsai, Chih-Hua Chang, Arun Sowpati
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Publication number: 20240056080Abstract: A level shifter includes a cross-coupled transistor pair, first through third cascode transistor pairs and a differential input pair sequentially coupled in series, and further includes a sub level shifter. The first cascode transistor pair is controlled by a first reference voltage. The second cascode transistor pair is controlled by a pair of differential control voltages. The third cascode transistor pair is controlled by a second reference voltage lower than the first reference voltage. The differential input pair is controlled by a pair of differential input voltages. The sub level shifter generates the differential control voltages according to the differential input voltages and the first and second reference voltages. The differential control voltages are switched between the first and second reference voltages. The level shifter outputs a pair of differential output voltages through inverted and non-inverted output terminals coupled with the second cascode transistor pair.Type: ApplicationFiled: August 8, 2023Publication date: February 15, 2024Inventors: Chun-Yuan LO, Wu-Chang CHANG, Bo-Chang LI
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Publication number: 20240057344Abstract: A semiconductor device includes a bottom electrode via, a top electrode via over the bottom electrode via, a memory cell between the bottom electrode via and the top electrode via, a first dielectric layer over the memory cell, and a second dielectric layer over the first dielectric layer, and a via structure separated from the memory cell. A height of the via structure is substantially equal to a sum of a height of the bottom electrode via, a height of the memory cell, and a height of the top electrode via. The first dielectric layer partially surrounds a first portion of the via structure, and the second dielectric layer partially surrounds a second portion of the via structure. A height of the second portion of the via structure is greater than a height of the first portion of the via structure.Type: ApplicationFiled: October 24, 2023Publication date: February 15, 2024Inventors: HARRY-HAK-LAY CHUANG, WU-CHANG TSAI, TIEN-WEI CHIANG
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Publication number: 20240013743Abstract: A cholesteric liquid crystal (ChLC) display and driving method thereof are provided. The ChLC display has a driving circuit for providing voltage on a scan line and a data line so as to drive a pixel. The driving circuit provides a first voltage and a second voltage to the data and the scan lines during a first time period, a third voltage to the data line and/or a fourth voltage to the scan line during a second time period, a fifth voltage and a sixth voltage to the data and the scan lines during a third time period. The first and sixth voltages are high levels, the second and fifth voltages are low levels, the levels of the third and fourth voltages are between the high and low levels.Type: ApplicationFiled: July 11, 2023Publication date: January 11, 2024Inventors: Chia-Che WU, Wu-Chang YANG, Chi-Chang LIAO
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Patent number: 11852941Abstract: A cholesteric liquid crystal display device includes a solar cell, a first substrate, a shielding layer, a first electrode layer, a cholesteric liquid crystal layer, a second electrode layer and a second substrate stacked sequentially from bottom to top. The solar cell includes a metal wiring pattern layer. The shielding layer corresponds to the upper side of the metal wiring pattern layer, and is used to reduce the reflection of light from the metal circuit pattern layer. In this way, the cholesteric liquid crystal display device replaces the traditional black absorbing layer with the black material of the solar cell, which can not only absorb light, but also display the image with self-sustaining power. The cholesteric liquid crystal display device shields the arrangement of the metal wiring pattern layer through the shielding layer, which can ensure the image quality of the display panel.Type: GrantFiled: January 18, 2023Date of Patent: December 26, 2023Assignee: IRIS OPTRONICS CO., LTD.Inventors: Wu-Chang Yang, Hung Tien Chen, Chi-Chang Liao
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Publication number: 20230386426Abstract: The present invention relates to a driving method of a cholesteric liquid crystal display. It includes the steps in the following: driving each scan line by a dynamic driving scheme (DDS) including an Evolution phase; refreshing a frame of the cholesteric liquid crystal display by a full refresh mode, each scan line driven N times during the Evolution phase in the full refresh mode; and refreshing a part of the frame by a partial-refresh mode, each scan line driven M times in the Evolution phase in the partial-refresh mode, wherein M is greater than N.Type: ApplicationFiled: May 10, 2023Publication date: November 30, 2023Inventors: MING-LIANG TSAI, WU-CHANG YANG, CHI-CHANG LIAO
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Patent number: 11832452Abstract: A semiconductor device includes a first dielectric layer, a second dielectric layer and a memory device. The second dielectric layer includes a first layer and a second layer. The memory device includes a first conductive structure under the first dielectric layer, a second conductive structure over the second dielectric layer, and a memory cell between the first and the second dielectric layers. The memory cell includes a bottom electrode via, a bottom electrode over the bottom electrode via, a top electrode over the bottom electrode, a top electrode via over the top electrode, and a MTJ between the top electrode and the bottom electrode. The second layer of the second dielectric layer surrounds sidewalls of the top electrode via entirely. The first layer of the second dielectric layer surrounds sidewalls of the bottom electrode entirely, sidewalls of the MTJ entirely, and sidewalls of the top electrode entirely.Type: GrantFiled: July 30, 2021Date of Patent: November 28, 2023Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.Inventors: Harry-Hak-Lay Chuang, Wu-Chang Tsai, Tien-Wei Chiang
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Publication number: 20230368747Abstract: The present invention relates to a cholesteric liquid crystal display, a micro processing unit, and a method for hybrid driving. The cholesteric liquid crystal display comprises a display panel and a micro processing unit. First, a grayscale threshold value needs to be set in advance. The micro processing unit will change the grayscale value of the display unit exceeding the grayscale threshold value to the new grayscale value displayed by the bright state color, and display the image by the DDS driving mode. Then the micro processing unit drives the display image in the PWM drive mode, which can greatly improve the color level and contrast display effect of the image.Type: ApplicationFiled: May 16, 2023Publication date: November 16, 2023Inventors: SHENG-YAO WANG, WU-CHANG YANG, CHENG-HUNG YAO, CHI-CHANG LIAO
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Publication number: 20230294933Abstract: A factory transition system and a transition device thereof are provided. The transition device is provided for being disposed on a partition wall that separates two rooms from each other, and includes a chamber and a filtering module assembled to the chamber. The chamber has a transition channel formed therein. The transition channel has two entrances respectively arranged on two ends thereof. The chamber is configured to correspond in position to the communication opening of the partition through one of the two entrances. The filtering module is spatially communicated with the transition channel. The filtering module is configured to perform a ventilation and filtration process for continuously suctioning air from an external environment of the transition device into the transition channel after filtering the air.Type: ApplicationFiled: March 15, 2023Publication date: September 21, 2023Inventors: CHIH-WU CHANG, YU-JIE CHIU, CHIANG-NI LU
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Publication number: 20230266169Abstract: A spectrometer includes a base, a light input element, a light splitting element, an image sensor and a shading element. The light input element is disposed on the base for receiving an optical signal. The light splitting element is disposed on the base to split the received optical signal into a plurality of spectral components. The image sensor is disposed on the base, and has a sensing surface for receiving the plurality of spectral components. The sensing surface has a virtual central line extending along an arrangement direction of the plurality of spectral components. The shading element is disposed between the light splitting element and the image sensor according to an optical influence factor, and is located on a projection path of a portion of the plurality of spectral components. A shadow generated by the shading element on the sensing surface does not fall on the virtual central line.Type: ApplicationFiled: February 16, 2023Publication date: August 24, 2023Inventors: HAO-PING WU, CHIEN-HSIANG HUNG, KUEI-WU CHANG
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Publication number: 20230229049Abstract: A cholesteric liquid crystal display device includes a solar cell, a first substrate, a shielding layer, a first electrode layer, a cholesteric liquid crystal layer, a second electrode layer and a second substrate stacked sequentially from bottom to top. The solar cell includes a metal wiring pattern layer. The shielding layer corresponds to the upper side of the metal wiring pattern layer, and is used to reduce the reflection of light from the metal circuit pattern layer. In this way, the cholesteric liquid crystal display device replaces the traditional black absorbing layer with the black material of the solar cell, which can not only absorb light, but also display the image with self-sustaining power. The cholesteric liquid crystal display device shields the arrangement of the metal wiring pattern layer through the shielding layer, which can ensure the image quality of the display panel.Type: ApplicationFiled: January 18, 2023Publication date: July 20, 2023Inventors: WU-CHANG YANG, HUNG TIEN CHEN, CHI-CHANG LIAO
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Publication number: 20230229034Abstract: A cholesteric liquid crystal display device includes a first substrate, a solar cell, a shielding layer, a first electrode layer, a cholesteric liquid crystal layer, a second electrode layer and a second substrate stacked sequentially from bottom to top. The solar cell includes a metal wiring pattern layer. The shielding layer corresponds to the upper side of the metal wiring pattern layer, and is used to reduce the reflection of light from the metal circuit pattern layer. In this way, the cholesteric liquid crystal display device replaces the traditional black absorbing layer with the black material of the solar cell, which can not only absorb light, but also display the image with self-sustaining power. The cholesteric liquid crystal display device shields the arrangement of the metal wiring pattern layer through the shielding layer, which can ensure the image quality of the display panel.Type: ApplicationFiled: January 18, 2023Publication date: July 20, 2023Inventors: WU-CHANG YANG, HUNG TIEN CHEN, CHI-CHANG LIAO
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Publication number: 20230185136Abstract: A cholesteric liquid crystal display device and a driving method for improving non-uniform image quality of the cholesteric liquid crystal display device. The cholesteric liquid crystal display device includes a cholesteric liquid crystal display panel and a liquid crystal drive unit. The cholesteric liquid crystal display panel is composed of multiple row circuit structures and multiple column circuit structures. The liquid crystal driving unit sequentially outputs column driving voltages to a plurality of column circuit structures in a scanning manner. After scanning the multiple column circuit structures, the liquid crystal driving unit applies an unselected voltage to the multiple column circuit structures together with more than 18 times the scanning unit time course, so as to make the brightness of the overall picture more uniform.Type: ApplicationFiled: December 8, 2022Publication date: June 15, 2023Inventors: MING-LIANG TSAI, WU-CHANG YANG, CHI-CHANG LIAO
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Publication number: 20230185121Abstract: A cholesteric liquid crystal display device and a control method for reducing inrush current when clearing the screen. The cholesteric liquid crystal display device includes a cholesteric liquid crystal display panel and a liquid crystal drive unit. The cholesteric liquid crystal display panel has a plurality of pixel matrix. After the liquid crystal drive unit receives a data latch enable signal, it applies a reset voltage to the plurality of pixel matrix to clear the screen displayed on the cholesteric liquid crystal display panel. The input time of the data latch enable signal received by the liquid crystal driving unit is different, and the corresponding signal time portion is shifted with each other.Type: ApplicationFiled: December 8, 2022Publication date: June 15, 2023Inventors: CHI-WEI LIN, WU-CHANG YANG, CHI-CHANG LIAO
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Publication number: 20230152615Abstract: A cholesterol liquid crystal display device includes a liquid crystal display panel and a liquid crystal driving unit. The liquid crystal display panel has a plurality of pixels. The liquid crystal driving unit applies row driving voltages and column driving voltages to a designated pixel according to the input signal. After the input signal is transmitted, the liquid crystal driving unit activates the power-down signal within a certain period of time to reduce the row driving voltage and the column driving voltage applied to the specified pixel. Thereby, the crosstalk phenomenon on the cholesteric liquid crystal display device can be improved.Type: ApplicationFiled: November 14, 2022Publication date: May 18, 2023Inventors: WU-CHANG YANG, CHI-CHANG LIAO
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Patent number: 11240970Abstract: Disclosures of the present invention describe a plant light raising and lowering apparatus. Particularly, a control module is configured for controlling a rope winch to complete at least one inching rotation along a clockwise direction or a counterclockwise direction, such that a base is driven by the rope winch so as to have an upward inching movement or a downward inching movement. Moreover, a counter is adopted for counting the direction, times and/or frequency of the inching rotation, and therefore the control module is able to know a total moving distance of the base by using the inching movement recording unit to record each time of the upward inching movement and each time of the downward inching movement. Therefore, a user is able to control the base to move back to a specific position such as an initial position or a previously-staying position.Type: GrantFiled: October 23, 2019Date of Patent: February 8, 2022Assignee: Win Chen Electrical Co., Ltd.Inventor: Wu-Chang Lee
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Patent number: 11189610Abstract: A substrate structure includes at least one detachable first substrate unit and a substrate body. The detachable first substrate unit includes a plurality of corners and a plurality of first engagement portions. Each of the first engagement portions is disposed at each of the corners of the detachable first substrate unit. The substrate body includes a plurality of second substrate units, at least one opening and a plurality of second engagement portions. The opening is substantially defined by a plurality of sidewalls of the second substrate units, and includes a plurality of corners. Each of the second engagement portions is disposed at each of the corners of the opening. The detachable first substrate unit is disposed in the opening, and the second engagement portions are engaged with the first engagement portions.Type: GrantFiled: June 27, 2018Date of Patent: November 30, 2021Assignee: Advanced Semiconductor Engineering, Inc.Inventors: Li-Chuan Tsai, Wu Chang Wang
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Publication number: 20210359001Abstract: A semiconductor device includes a first dielectric layer, a second dielectric layer and a memory device. The second dielectric layer includes a first layer and a second layer. The memory device includes a first conductive structure under the first dielectric layer, a second conductive structure over the second dielectric layer, and a memory cell between the first and the second dielectric layers. The memory cell includes a bottom electrode via, a bottom electrode over the bottom electrode via, a top electrode over the bottom electrode, a top electrode via over the top electrode, and a MTJ between the top electrode and the bottom electrode. The second layer of the second dielectric layer surrounds sidewalls of the top electrode via entirely. The first layer of the second dielectric layer surrounds sidewalls of the bottom electrode entirely, sidewalls of the MTJ entirely, and sidewalls of the top electrode entirely.Type: ApplicationFiled: July 30, 2021Publication date: November 18, 2021Inventors: HARRY-HAK-LAY CHUANG, WU-CHANG TSAI, TIEN-WEI CHIANG
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Patent number: 11088199Abstract: A semiconductor device includes a first dielectric layer, a second dielectric layer and a memory device. The second dielectric layer includes a first layer and a second layer. The memory device includes a first conductive structure under the first dielectric layer, a second conductive structure over the second dielectric layer, and a memory cell between the first and the second dielectric layers. The memory cell includes a bottom electrode via, a bottom electrode over the bottom electrode via, a top electrode over the bottom electrode, a top electrode via over the top electrode, and a MTJ between the top electrode and the bottom electrode. The second layer of the second dielectric layer surrounds sidewalls of the top electrode via entirely. The first layer of the second dielectric layer surrounds sidewalls of the bottom electrode entirely, sidewalls of the MTJ entirely, and sidewalls of the top electrode entirely.Type: GrantFiled: December 13, 2019Date of Patent: August 10, 2021Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.Inventors: Harry-Hak-Lay Chuang, Wu-Chang Tsai, Tien-Wei Chiang
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Publication number: 20200375118Abstract: Disclosures of the present invention describe a plant light raising and lowering apparatus. Particularly, a control module is configured for controlling a rope winch to complete at least one inching rotation along a clockwise direction or a counterclockwise direction, such that a base is driven by the rope winch so as to have an upward inching movement or a downward inching movement. Moreover, a counter is adopted for counting the direction, times and/or frequency of the inching rotation, and therefore the control module is able to know a total moving distance of the base by using the inching movement recording unit to record each time of the upward inching movement and each time of the downward inching movement. Therefore, a user is able to control the base to move back to a specific position such as an initial position or a previously-staying position.Type: ApplicationFiled: October 23, 2019Publication date: December 3, 2020Inventor: Wu-Chang Lee