Patents by Inventor Chang LIAO

Chang LIAO 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).

  • Patent number: 12360410
    Abstract: A self-powered display device is proposed, and includes a light-transmitting panel and a photoelectric converting module. The light-transmitting panel has a display region for allowing light to penetrate. The photoelectric converting module is electrically connected to the light-transmitting panel. The photoelectric converting module has a power generation region for absorbing the light penetrating the display region, and the photoelectric converting module converts the light into an electrical energy through the power generation region to provide the electrical energy to the light-transmitting panel. The light-transmitting panel is spaced apart from the photoelectric converting module, and a projected area of the display region on the power generation region is larger than an area of the power generation region.
    Type: Grant
    Filed: June 28, 2024
    Date of Patent: July 15, 2025
    Assignee: Iris Optronics Co., Ltd.
    Inventors: Chih Wei Chen, Chi Chang Liao
  • Publication number: 20250225949
    Abstract: The present invention is a cholesterol liquid crystal display and driving method thereof. The cholesterol liquid crystal display includes a display panel and a liquid crystal driving unit. The display panel is used to display images composed of a row of imaging drive pixels and multiple rows of non-imaging drive pixels. The liquid crystal driving unit simultaneously drives the display panel to show images by applying a first driving voltage to multiple non-imaging drive pixels and a second driving voltage to imaging drive pixels. The first driving voltage has a quantity of the first pulse waves within a unit time, and the second driving voltage has a quantity of the second pulse waves within the unit time. The quantity of the first pulse waves is at least 5 times greater than the quantity of the second pulse waves, and the higher the multiple, the better the display effect.
    Type: Application
    Filed: February 22, 2024
    Publication date: July 10, 2025
    Inventors: HUI-CHENG LIN, CHENG-HONG YAO, CHI-CHANG LIAO
  • Patent number: 12339554
    Abstract: 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: Grant
    Filed: December 28, 2023
    Date of Patent: June 24, 2025
    Assignee: IRIS OPTRONICS CO., LTD.
    Inventors: Chung-Yi Chang, Wu-Chang Yang, Chi-Chang Liao
  • Patent number: 12332528
    Abstract: 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: Grant
    Filed: October 13, 2023
    Date of Patent: June 17, 2025
    Assignee: IRIS OPTRONICS CO., LTD.
    Inventors: Chi-Chang Liao, Wu-Chang Yang
  • Patent number: 12334031
    Abstract: The present disclosure provides a method for driving a cholesteric liquid crystal display device. The method includes the following steps: utilizing a driving circuit section to sequentially activate each scanning electrode within a display panel; utilizing the driving circuit section to apply first alternating-current (AC) voltage pulses to pixel circuits on an activated scanning electrode during a first stage within a pulse-width modulation (PWM) scanning procedure of an activated scanning electrode; and utilizing the driving circuit section to apply second AC voltage pulses to the pixel circuits on the activated scanning electrode during a second stage of the PWM scanning procedure. A first voltage amplitude and a first period of the first AC voltage pulses are different from a second voltage amplitude and a second period of the second AC voltage pulses, respectively.
    Type: Grant
    Filed: April 10, 2024
    Date of Patent: June 17, 2025
    Assignee: IRIS OPTRONICS CO., LTD.
    Inventors: Hui Cheng Lin, Cheng-Hong Yao, Chi Chang Liao
  • Patent number: 12336222
    Abstract: A semiconductor structure is provided. The semiconductor structure includes a substrate, a first superlattice structure and a second superlattice structure over the substrate, a gate stack that surrounds a channel region of each of the first superlattice structures and the second superlattice structure, and source/drain structures on opposite sides of the gate stack contacting sidewalls of the first superlattice structure and the second superlattice structure. The second superlattice structure is disposed over the first superlattice structure. Each of the first superlattice structures and the second superlattice structure includes vertically stacked alternating first nanosheets of a first semiconductor material and second nanosheets of a second semiconductor material that is different from the first semiconductor material.
    Type: Grant
    Filed: July 31, 2023
    Date of Patent: June 17, 2025
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Shin-Cheng Liu, Kuei-Shu Chang Liao
  • Publication number: 20250182712
    Abstract: 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: Application
    Filed: February 9, 2025
    Publication date: June 5, 2025
    Inventors: SHENG-YAO WANG, WU-CHANG YANG, CHENG-HUNG YAO, CHI-CHANG LIAO
  • Patent number: 12313924
    Abstract: A self-powered display device includes a display module and a power module. The display module is a cholesteric liquid crystal display module, and the power module is a solar cell module. The display module allows light to enter the power module from the front side, and the power module generates electricity upon receiving the light to provide the necessary energy for the display module to show images. The power module has multiple active areas and multiple inactive areas between the active areas. When the width of the inactive area is less than or equal to 50 ?m, the human eye will have difficulty discerning the width of the inactive area. Additionally, a shielding layer can be placed on the inactive area to ensure that the visual color difference (?E) between the inactive area and the active area does not exceed 10 color difference units, thereby improving the image quality.
    Type: Grant
    Filed: October 27, 2023
    Date of Patent: May 27, 2025
    Assignee: IRIS OPTRONICS CO., LTD.
    Inventors: Chung-Yi Chang, Chih-Wei Chen, Chi-Chang Liao
  • Publication number: 20250123510
    Abstract: A self-powered display device is proposed, and includes a light-transmitting panel and a photoelectric converting module. The light-transmitting panel has a display region for allowing light to penetrate. The photoelectric converting module is electrically connected to the light-transmitting panel. The photoelectric converting module has a power generation region for absorbing the light penetrating the display region, and the photoelectric converting module converts the light into an electrical energy through the power generation region to provide the electrical energy to the light-transmitting panel. The light-transmitting panel is spaced apart from the photoelectric converting module, and a projected area of the display region on the power generation region is larger than an area of the power generation region.
    Type: Application
    Filed: June 28, 2024
    Publication date: April 17, 2025
    Inventors: Chih Wei CHEN, Chi Chang LIAO
  • Publication number: 20250116891
    Abstract: A liquid crystal display includes a display panel and a driving unit. The display panel includes a plurality of resetting sections, which correspond to display a plurality of screens, respectively. There is a first voltage difference between a corresponding one of the column voltages and a corresponding one of the row voltages of one of the resetting sections, and there is a second voltage difference between a corresponding one of the column voltages and a corresponding one of the row voltages of another of the resetting sections. The second voltage difference reaching a second maximum voltage difference value is after the first voltage difference reaching a first maximum voltage difference value by a delay time, so as to clear the screens.
    Type: Application
    Filed: September 30, 2024
    Publication date: April 10, 2025
    Inventors: Ting Yu TAI, Sheng Yao WANG, Wu Chang YANG, Chi Chang LIAO
  • Patent number: 12272329
    Abstract: 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: Grant
    Filed: May 16, 2023
    Date of Patent: April 8, 2025
    Assignee: IRIS OPTRONICS CO., LTD.
    Inventors: Sheng-Yao Wang, Wu-Chang Yang, Cheng-Hung Yao, Chi-Chang Liao
  • Patent number: 12266321
    Abstract: 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: Grant
    Filed: July 11, 2023
    Date of Patent: April 1, 2025
    Assignee: IRIS OPTRONICS CO., LTD.
    Inventors: Chia-Che Wu, Wu-Chang Yang, Chi-Chang Liao
  • Publication number: 20250085751
    Abstract: A thermal power budget optimization method includes acquiring sensor log information from a plurality of sensors of a heating device, generating a virtual surface temperature of the heating device according to the sensor log information, setting a target surface temperature of the heating device, and dynamically adjusting a thermal power budget of the heating device according to the virtual surface temperature and the target surface temperature over time.
    Type: Application
    Filed: July 29, 2024
    Publication date: March 13, 2025
    Applicant: MEDIATEK INC.
    Inventors: Yu-Chia Chang, Chien-Chih Huang, Ta-Chang Liao, Chia-Feng Yeh, Ching-Lin Hsiao, Wei-Te Wu
  • Patent number: 12235559
    Abstract: A double-layer cholesteric liquid crystal display and its manufacturing method are disclosed. The double-layer cholesteric liquid crystal display includes three transparent substrates, two opposing electrode layers, two cholesteric liquid crystal layers, and a first light-absorbing layer. Additionally, the double-layer cholesteric liquid crystal display incorporates two drive ICs and a second light-absorbing layer. The two drive ICs can be positioned either on the same side or on opposite sides within the non-display area of the double-layer cholesteric liquid crystal display. Furthermore, the first cholesteric liquid crystal layer exhibits a first color light, and the second cholesteric liquid crystal layer exhibits a second color light, where the colors are selected as contrasting colors. Additionally, the two cholesteric liquid crystal layers possess mutually opposite optical rotary properties.
    Type: Grant
    Filed: June 3, 2024
    Date of Patent: February 25, 2025
    Assignee: IRIS OPTRONICS CO., LTD.
    Inventors: Cheng-Yu Lin, Cheng-Hong Yao, Chi-Chang Liao
  • Patent number: 12235529
    Abstract: A cholesteric liquid crystal display comprising red, green, and blue cholesteric liquid crystal modules. It further comprises a first thin-film photovoltaic module disposed between the blue and the green cholesteric liquid crystal modules, and a second thin-film photovoltaic module disposed between the green and the first selective light reflection modules. The first thin-film photovoltaic module is partially photo-permeable in which the transmittance of blue light is lower than the transmittance of the other lights. It IS preferably a dye sensitized solar cell module which specifically responsible for harvesting blue light. The second thin-film photovoltaic module is partially photo-permeable in which the transmittance of green light is lower than the transmittance of the other lights. It is preferably a dye sensitized solar cell module which specifically responsible for harvesting green light.
    Type: Grant
    Filed: April 19, 2024
    Date of Patent: February 25, 2025
    Assignee: IRIS OPTRONICS CO., LTD.
    Inventors: Chi-Chang Liao, Junji Tomita
  • Patent number: 12235528
    Abstract: The present invention relates to a cholesteric liquid crystal display device, and a control method. The cholesteric liquid crystal display device includes a cholesteric liquid crystal display module, a solar battery unit, and a control unit. The control unit further includes an ambient energy management module and an energy storage module. The solar battery unit provides electrical energy to the management module. And the ambient energy management module stores electrical energy in the energy storage module. When it is necessary to refresh the images of the cholesteric liquid crystal display module, and the potential difference of the energy storage module reaches the charging cut-off voltage. The energy storage module can discharge the stored electrical energy to provide the electrical energy required by the cholesteric liquid crystal display module to refresh the image.
    Type: Grant
    Filed: July 25, 2023
    Date of Patent: February 25, 2025
    Assignee: IRIS OPTRONICS CO., LTD.
    Inventors: Chung-Yi Chang, Chi-Chang Liao
  • Publication number: 20250060624
    Abstract: A self-powered display device includes a display module and a power module. The display module is a cholesteric liquid crystal display module, and the power module is a solar cell module. The display module allows light to enter the power module from the front side, and the power module generates electricity upon receiving the light to provide the necessary energy for the display module to show images. The power module has multiple active areas and multiple inactive areas between the active areas. When the width of the inactive area is less than or equal to 50 ?m, the human eye will have difficulty discerning the width of the inactive area. Additionally, a shielding layer can be placed on the inactive area to ensure that the visual color difference (?E) between the inactive area and the active area does not exceed 10 color difference units, thereby improving the image quality.
    Type: Application
    Filed: October 27, 2023
    Publication date: February 20, 2025
    Inventors: CHUNG-YI CHANG, CHIH-WEI CHEN, CHI-CHANG LIAO
  • Publication number: 20250061866
    Abstract: A composite display device includes a composite display, a brightness acquisition module, an image management module and a panel controlling module. The composite display includes a first display panel and a second display panel. The brightness acquisition module is connected to the composite display and acquires an ambient brightness around the composite display. The image management module is connected to the brightness acquisition module and generates a first image setting signal and a second image setting signal according to the ambient brightness. The panel controlling module is connected to the image management module and the composite display, and respectively controls the first display panel and the second display panel to display a first and second images based on the first and second image setting signals to form a composite image.
    Type: Application
    Filed: August 15, 2024
    Publication date: February 20, 2025
    Inventors: Chih Wei CHEN, Chi Chang LIAO
  • Patent number: 12216359
    Abstract: A spliced reflective display includes multiple display devices, a front light guide plate, and at least one light source. Among the multiple display devices, one display device is joined side-by-side with another to form an adjacent joint. The front light guide plate is affixed above the multiple display devices and is close to the display side. It has a top surface near the display side and includes an optical structure. The at least one light source is positioned at the side of the front light guide plate, and light therefrom reflects off the top surface of the front light guide plate onto the multiple display devices, and the reflected light from the display devices forms image light that is directed towards the display side to produce an image. The optical structure directs the path of the image light to obscure the adjacent joint from being visible on the display side.
    Type: Grant
    Filed: June 3, 2024
    Date of Patent: February 4, 2025
    Assignee: IRIS OPTRONICS CO., LTD.
    Inventors: Cheng-Yu Lin, Cheng-Hong Yao, Chi-Chang Liao
  • Publication number: 20240419035
    Abstract: A spliced reflective display includes multiple display devices, a front light guide plate, and at least one light source. Among the multiple display devices, one display device is joined side-by-side with another to form an adjacent joint. The front light guide plate is affixed above the multiple display devices and is close to the display side. It has a top surface near the display side and includes an optical structure. The at least one light source is positioned at the side of the front light guide plate, and light therefrom reflects off the top surface of the front light guide plate onto the multiple display devices, and the reflected light from the display devices forms image light that is directed towards the display side to produce an image. The optical structure directs the path of the image light to obscure the adjacent joint from being visible on the display side.
    Type: Application
    Filed: June 3, 2024
    Publication date: December 19, 2024
    Inventors: CHENG-YU LIN, CHENG-HONG YAO, CHI-CHANG LIAO