Patents by Inventor Wu.Chang Yang
Wu.Chang Yang 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: 12085793Abstract: 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: GrantFiled: January 18, 2023Date of Patent: September 10, 2024Assignee: IRIS OPTRONICS CO., LTD.Inventors: Wu-Chang Yang, Hung Tien Chen, Chi-Chang Liao
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Patent number: 12078879Abstract: 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: GrantFiled: December 8, 2022Date of Patent: September 3, 2024Assignee: IRIS OPTRONICS CO., LTD.Inventors: Chi-Wei Lin, Wu-Chang Yang, Chi-Chang Liao
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Publication number: 20240241416Abstract: A self-powered cholesteric liquid crystal display (ChLCD) device and a method for tracking maximum power are disclosed. The ChLCD device includes a solar cell module, electrical energy for charging, an energy storage device, a charging unit, and a ChLCD module. The method of tracking the maximum power is: supply electrical energy for charging to the charging unit, sense the ambient temperature, and capture the sensed ambient temperature, correspond its value to the voltage value in the comparison data, and adjust the reference driving voltage with a resistor divider, and then electrically charging to the charging unit by the reference driving voltage, so that the charging unit can capture the maximum power of the electrical energy from the solar cell module, and then store the electrical energy in the energy storage device, to refresh the display screen of the ChLCD module and the ChLCD device can effectively utilize electricity.Type: ApplicationFiled: December 28, 2023Publication date: July 18, 2024Inventors: CHUNG-YI CHANG, WU-CHANG YANG, CHI-CHANG LIAO
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Patent number: 11977302Abstract: 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: GrantFiled: December 8, 2022Date of Patent: May 7, 2024Assignee: IRIS OPTRONICS CO., LTD.Inventors: Ming-Liang Tsai, Wu-Chang Yang, Chi-Chang Liao
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Publication number: 20240126127Abstract: A cholesteric liquid crystal display device includes a first substrate, a second substrate, a third substrate, a first cholesteric liquid crystal layer, a second cholesteric liquid crystal layer, a first common electrode pattern layer, a second common electrode pattern layer, and a first TFT circuit pattern layer and the second TFT circuit pattern layer. The first cholesteric liquid crystal layer is disposed between the first substrate and the second substrate. The second cholesteric liquid crystal layer is disposed between the second substrate and the third substrate. The first common electrode pattern layer is disposed on the first substrate. The second common electrode pattern layer is disposed on the third substrate. The first TFT circuit pattern layer and the second TFT circuit pattern layer are respectively disposed on two opposite surfaces of the second substrate. The first TFT circuit pattern layer and the second TFT circuit pattern layer are arranged correspondingly.Type: ApplicationFiled: October 13, 2023Publication date: April 18, 2024Inventors: CHI-CHANG LIAO, WU-CHANG YANG
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Patent number: 11948528Abstract: 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: GrantFiled: May 10, 2023Date of Patent: April 2, 2024Assignee: IRIS OPTRONICS CO., LTD.Inventors: Ming-Liang Tsai, Wu-Chang Yang, Chi-Chang Liao
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Patent number: 11947204Abstract: 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: GrantFiled: November 14, 2022Date of Patent: April 2, 2024Assignee: IRIS OPTRONICS CO., LTD.Inventors: Wu-Chang Yang, Chi-Chang Liao
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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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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: 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: 10403650Abstract: An electronic device and a manufacturing method thereof are disclosed. The manufacturing method of an electronic device includes following steps: forming a flexible substrate on a rigid carrier plate; forming at least a thin-film device on the flexible substrate; forming a conductive line on the flexible substrate, wherein the conductive line is electrically connected with the thin-film device; forming at least an electrical connection pad on the flexible substrate, wherein the electrical connection pad is electrically connected with the conductive line, and the thickness of the electrical connection pad is between 2 and 20 microns; disposing at least a surface-mount device (SMD) on the flexible substrate, wherein the SMD is electrically connected with the thin-film device through the electrical connection pad and the conductive line; and removing the rigid carrier plate.Type: GrantFiled: May 8, 2018Date of Patent: September 3, 2019Assignee: GIO OPTOELECTRONICS CORP.Inventor: Wu-Chang Yang
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Publication number: 20180337196Abstract: An electronic device and a manufacturing method thereof are disclosed. The manufacturing method of an electronic device includes following steps: forming a flexible substrate on a rigid carrier plate; forming at least a thin-film device on the flexible substrate; forming a conductive line on the flexible substrate, wherein the conductive line is electrically connected with the thin-film device; forming at least an electrical connection pad on the flexible substrate, wherein the electrical connection pad is electrically connected with the conductive line, and the thickness of the electrical connection pad is between 2 and 20 microns; disposing at least a surface-mount device (SMD) on the flexible substrate, wherein the SMD is electrically connected with the thin-film device through the electrical connection pad and the conductive line; and removing the rigid carrier plate.Type: ApplicationFiled: May 8, 2018Publication date: November 22, 2018Inventor: Wu-Chang YANG
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Publication number: 20170039935Abstract: A pixel circuit includes a lighting element, a driving signal generating unit and a switching unit. The driving signal generating unit compares a data signal with a reference signal so as to generate a PWM driving signal. The status of the PWM driving signal is determined according to the comparing result of the data signal and the reference signal. The switching unit is electrically connected to a power source and the lighting element, and generates a driving current to drive the lighting element to emit light according to the PWM driving signal.Type: ApplicationFiled: August 3, 2016Publication date: February 9, 2017Inventors: Wu-Chang YANG, Chia-Ho YANG
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Patent number: 8749140Abstract: A light emitting apparatus receives an external power. A switching unit is electrically connected with a light emitting unit to form a serial circuit. A first electrical connection element is electrically connected with the external power and the light emitting unit. A second electrical connection element is electrically connected with the external power and the switching unit. A sensing unit is electrically connected with the first electrical connection element, the second electrical connection element and the switching unit. When filament currents flow between two electrical input terminals of the first electrical connection element and between two electrical input terminals of the second electrical connection element, the sensing unit controls the switching unit to turn on to enable the light emitting unit to receive the external power and start to emit light. Thus, users can avoid the risk of electric shock when installing the light emitting apparatus.Type: GrantFiled: December 7, 2012Date of Patent: June 10, 2014Assignee: Gio Optoelectronics Corp.Inventor: Wu-Chang Yang