Patents Assigned to Hannstar Display Corp.
  • Fastening apparatus for a backlight assembly
    Patent number: 7510318
    Abstract: The fastening apparatus utilizes a hanger and a hook disposed on the first side of a base of the fastening apparatus for hanging and fixing the fastening apparatus on a back cover of the LCD device. A groove divides the base into two parts and the outer part of the base as well as the hook is flexible relative to the inner part of the base. Two crack arresters are disposed at the end of the groove for preventing cracking of the fastening apparatus when repeated bending movement is needed while installing the fastening apparatus.
    Type: Grant
    Filed: March 12, 2007
    Date of Patent: March 31, 2009
    Assignee: HannStar Display Corp.
    Inventor: Po-Chun Chen
  • Polarized light source device and back light module for liquid crystal display
    Patent number: 7497611
    Abstract: A polarized light source device comprises a light source, a reflector, a transparent substrate, an antireflection layer, and a plurality of metal grid wires. The reflector surrounds the light source for reflecting the light, and has an opening for emitting the light. The transparent substrate is disposed at the opening. The antireflection layer is disposed on the transparent substrate. The metal grid wires are disposed on the antireflection layer for transmitting the light with a predetermined polarization therethrough.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: March 3, 2009
    Assignee: Hannstar Display Corp.
    Inventors: Wei Chou Chen, Kei Hsiung Yang
  • Touch panel
    Patent number: 7495713
    Abstract: A touch panel is provided. The touch panel comprises a first substrate and a second substrate facing the first substrate. A black matrix is formed on the first substrate defining a plurality of sub-pixel areas, a plurality of color filters on the sub-pixel areas. A photosensitive sensitive element is formed on the second substrate. The color filters comprise a red color filter, a green color filter, a blue color filter and a white color filter over the photosensitive element.
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: February 24, 2009
    Assignee: Hannstar Display Corp.
    Inventors: Cheng-Yeh Tsai, Wei-Chou Chen
  • Repair structure and method for liquid crystal display
    Patent number: 7492438
    Abstract: A data line repair structure for a liquid crystal display panel. The data line repair structure includes a first repair line parallel to a scan line and crossing the first end of a data line; a second repair line parallel to the data line and connected to a gate driving chip; and a third repair line parallel to the scan line and crossing the second end of the data line. When the data line has a broken point, the source driving chip transmits a data signal to a pixel electrode through the first repair line, the second repair line, and the third repair line.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: February 17, 2009
    Assignee: Hannstar Display Corp.
    Inventors: Sung-Chun Lin, Te-Cheng Chung, Yi-Tse Lin, Hsuan-Chen Liu
  • Liquid crystal display device and method for making the same and method for repairing defective pixel using the same
    Patent number: 7489370
    Abstract: A liquid crystal display device comprises a first sub-pixel electrode and a second sub-pixel electrode together forming a pixel cell, a dual thin film transistor having two electrodes electrically connected to the first and second sub-pixel electrodes respectively, and a connecting layer formed between the first and second sub-pixel electrodes. When one of the first and second sub-pixel electrodes is defective, the electrical path between the defective one and the dual thin film transistor is cut; then, the first and second sub-pixel electrodes are electrically connected together through the connecting layer whereby repairing the defective pixel cell.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: February 10, 2009
    Assignee: Hannstar Display Corp.
    Inventors: Sung Chun Lin, Ming Tien Lin, Te Cheng Chung
  • Backlight module of a liquid crystal display, display device, method of improving color gamut of a display device
    Patent number: 7486354
    Abstract: A cut filter is used in a backlight module or a display device and positioned over the light source to filter off a part of the light comprising an overlap of at least two of the red light, the green light, and the blue light. By filtering off the overlapping part of light emitted from the light source to obtain a purer primary color light, the display device equipped with a conventional color filter can attain an improved color gamut.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: February 3, 2009
    Assignee: HannStar Display Corp.
    Inventors: Chih-Li Chang, Chi-Jen Huang, Hung-Chen Kao, Ching-Cherng Sun, Cheng-Chung Lee
  • Backlight module using replaceable external electrode lamps
    Patent number: 7455442
    Abstract: A backlight module includes a back plate, replaceable light source sets, external electrode lamps, and a fastening device. Each replaceable light source set is disposed on the back plate and has an electrically conductive strip. The external electrode lamps are disposed on one of the replaceable light source sets and each has an external electrode electrically connected with the electrically conductive strip. The fastening device is used for fastening the replaceable light source sets and comprises an electrically conductive element electrically connected with the electrically conductive strips.
    Type: Grant
    Filed: January 4, 2006
    Date of Patent: November 25, 2008
    Assignee: HannStar Display Corp.
    Inventors: Chi-Jen Huang, Hsin Chieh Lai
  • Display panel
    Patent number: 7456475
    Abstract: The invention discloses a display panel. A substrate comprising a chip bonding region and a cut cross-section is provided. A first conductive layer is disposed on the chip bonding region. An insulating layer is disposed on the substrate between the first conductive layer and the cut cross-section, covering a sidewall of the first conductive layer. A second conductive layer is disposed on the insulating layer extending until the cut cross-section and electrically connected to the first conductive layer.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: November 25, 2008
    Assignee: Hannstar Display Corp.
    Inventors: Pao-Yun Tang, Po-Yang Chen
  • Image TFT array of a direct X-ray image sensor and method of fabricating the same
    Patent number: 7452782
    Abstract: A method of fabricating an image TFT array of a direct X-ray image sensor includes forming a first transparent conductive layer on a substrate; forming a gate line including a gate electrode, a common line, and a common electrode jutting out from the common line; forming an insulation layer; forming a semiconducting island on the insulation layer in the transistor region; forming a first via hole for the common electrode; forming a data line and a source electrode and a drain electrode; forming a passivation layer and a second via hole penetrating the passivation layer for the source electrode; forming a second transparent conductive layer as a top electrode. The insulation layer is formed on the first transparent conductive layer to serve as a dielectric layer of a capacitor before the TFT structure formed and can be formed at a relatively high temperature.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: November 18, 2008
    Assignee: HannStar Display Corp.
    Inventors: Chian-Chih Hsiao, Chih-Chieh Lan
  • Pixel electrode structure for a liquid crystal display with a high aperture ratio
    Patent number: 7440062
    Abstract: A pixel electrode structure for a liquid crystal display with a high aperture ratio increases the aperture ratio and eliminates Mura phenomenon. Any two adjacent pixel electrodes are disconnected to each other. Each pixel electrode comprises a first-lengthwise periphery that overlaps a first-adjacent data line to form a first overlapping portion, and a second-lengthwise periphery that overlaps a second-adjacent data line to form a second overlapping portion. The first-lengthwise periphery and the second-lengthwise periphery have an identical triangle-wave profile and are symmetrical to each other. The triangle-wave profile is formed by connecting a plurality of right-angled and equilateral triangles.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: October 21, 2008
    Assignee: Hannstar Display Corp.
    Inventors: Hsiang-Lung Liu, Hsu-Ho Wu
  • Structure and manufacturing method of an image TFT array
    Patent number: 7439544
    Abstract: The present invention provides a manufacturing method of an image TFT array, which includes providing a substrate including a thin film transistor region, a storage capacitor region, a pad region, and a common electrode region, forming a photoresist layer on the substrate, and performing a photolithographic and etching process by utilizing a half-tone mask to pattern the photoresist layer to define a position of a through hole on the storage capacitor region and form the photoresist layer of a first thickness on the thin film transistor region and the photoresist layer of a second thickness on the region between the thin film transistor region and the storage capacitor region, wherein the first thickness is greater than the second thickness.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: October 21, 2008
    Assignee: HannStar Display Corp.
    Inventors: Chin-Mao Lin, Kei-Hsiung Yang, Chian-Chih Hsiao
  • Liquid crystal display panel
    Patent number: 7408606
    Abstract: A liquid crystal display panel is disclosed, in which each sub-pixel electrode has an opening in the center and a patterned conductive layer as a bias electrode is positioned relatively around the sub-pixel electrode. Upon being applied with a voltage, the liquid crystal molecules above the sub-pixel around the opening will tilt down outwardly and radially. Upon being applied with a bias voltage, the liquid crystal molecules above the bias electrode will be arranged parallel to the substrate due to the effect from the electric field. The liquid crystal layer may further comprise a chiral dopant, such that the molecules twist when they tilt.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: August 5, 2008
    Assignee: HannStar Display Corp.
    Inventor: Po-Sheng Shih
  • Method for alignment of liquid crystal molecules by using hydrogen ion beam in an amount greater than one hundred times that of non-hydrogen ions
    Patent number: 7405788
    Abstract: A method that uses at least one hydrogen ion beam for alignment of liquid crystal molecules is proposed in the present invention. The method of the present invention is proposed to resolve the problems of physical destruction and surface deterioration of the alignment films caused by the conventional method using argon ions beams. The method of the present invention directly uses at least one hydrogen ion beam to impact the alignment film. Hence, the physical destruction of the alignment film is reduced. In addition, via the reaction between hydrogen ions and the alignment films, the quality of the alignment film is improved.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: July 29, 2008
    Assignees: Taiwan TFT LCD Association, Chunghwa Picture Tubes, Ltd., Au Optronics Corp., Quanta Display Inc., Hannstar Display Corp., Chi Mei Optoelectronics Corp., Industrial Technology Research Institute, Toppoly Optoelectronics Corp.
    Inventors: Bang-Hao Wu, Ching-Wen Hsiao, Yu-Ming Chen, Hsin-Chun Chiang, Chung-Wen Wu
  • Liquid crystal display panel and method manufacturing the same having particular spacers
    Patent number: 7400373
    Abstract: A liquid crystal display (LCD) panel has a structure in which one of the thin film transistor (TFT) substrate and the color filter (CF) substrate has an indented pattern surface to contact or surround the end of the spacer, such that the friction between the spacers and indented pattern surface can be reduced, thus shifting of spacer to a wrong position can be avoided. A method of manufacturing such LCD panel is also disclosed.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: July 15, 2008
    Assignee: HannStar Display Corp.
    Inventors: Yung-Ho Chang, Ching-Chao Chang, Chien-Feng Chen
  • Process and structure for repairing defect of liquid crystal display
    Patent number: 7394518
    Abstract: A process for repairing defects applied in producing a liquid crystal display, wherein the liquid crystal display includes a pixel array formed by a plurality of scanning lines crossing with a plurality of data lines. The process includes steps of providing an essential repair line located on one side of the pixel array, welding a first intersection point of a defecting data line and the essential repair line and a second intersection point of a normal data line adjacent to the defecting data line and the essential repair line by a first laser to achieve electrical connection, and cutting a first breaking point and a second breaking point of the essential repair line by a second laser to achieve a broken circuit, wherein the first and second intersection points are located two sides of a line segment constructed by the first and second intersection points respectively.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: July 1, 2008
    Assignee: Hannstar Display Corp.
    Inventors: Hong-Jye Hong, George Hsu, Chih-Wei Wang
  • Method of fabricating active layer thin film by metal chalcogenide precursor solution
    Patent number: 7390715
    Abstract: A method of fabricating an active layer thin film by a metal-chalcogenide precursor solution is provided, including the steps of: synthesizing a metal-chalcogenide precursor containing benzyl or benzyl derivative; dissolving the precursor in a solvent to produce a precursor solution, wherein a chalcogen element or compound can be added to the precursor solution to adjust the molar ratio of metal ion to chalcogen; and then applying the precursor solution onto a substrate in a specific coating manner, to form a film of the metal-chalcogenide after a curing process. Thereby, the existing method wherein an amorphous silicon active layer film is fabricated by plasma enhanced chemical vapor deposition (PECVD) is replaced.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: June 24, 2008
    Assignees: Taiwan TFT LCD Association, Chunghwa Picture Tubes, Ltd., Au Optronics Corp., Quanta Display Inc., Hannstar Display Corp., Chi Mei Optoelectronics Corp., Industrial Technology Research Institute, Toppoly Optoelectronics Corp.
    Inventors: Chun-Yao Ou, Hua-Chi Cheng, Ming-Nan Hsiao, Bor-Chuan Chuang, Chao-Jen Wang
  • Liquid crystal display device and backlight module thereof comprising a spacer for supporting the optical film set
    Patent number: 7382423
    Abstract: A backlight module is applied to a liquid crystal display device. The liquid crystal display device includes an optical film set having at least one optical film. The optical film set is disposed above the backlight module. The backlight module includes a housing and a spacer. The housing has a bottom plate provided with a through opening, an inward side and an outward side, wherein the inward side faces the optical film and the outward side is opposite to the inward side. The spacer supports the optical film set and is mounted onto the bottom plate of the backlight module from the outward side of the bottom plate.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: June 3, 2008
    Assignee: Hannstar Display Corp.
    Inventors: Ke Chin Chang, Fu Tung Chen, Yu Hsien Wang
  • Driving circuit and method for increasing effective bits of source drivers
    Patent number: 7379004
    Abstract: An LCD driving circuit and method for increasing effective bit(s) of the source driver is disclosed. A reference voltage generator generates a group of compensated reference voltage levels that are interlaced with original reference voltage level of original reference voltage generator. One of the multiple groups of reference voltage levels is selected by one or more least significant bits (LSBs), and is then inputted to digital-to-Analog converter of the source driver under control of the one or more least significant bits (LSBs), thereby effectively and economically enhancing the gray levels of the display on the LCD panel.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: May 27, 2008
    Assignee: Hannstar Display Corp.
    Inventors: Chin-Hung Hsu, Ming-Lin Lee, Chun-Chieh Chen, Nan-Ku Lu
  • Method of forming color filter layer having light-scattering effect
    Patent number: 7374845
    Abstract: A method of forming a color filter layer having a light-scattering effect. First, substrate is provided, and a color filter layer is coated on the substrate. Then, an exposure-and-development process is performed to pattern the color filter layer. Subsequently, the color filter layer is post-baked to render the color filter layer a rough surface to provide the light-scattering effect, wherein the color filter layer has a surface roughness index Rz in the range of 0.5 to 2.0 ?m.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: May 20, 2008
    Assignee: HannStar Display Corp.
    Inventors: Szu-Yu Fang, Chia-Hua Yu, Tean-Sen Jen
  • Direct type backlight unit
    Patent number: 7367708
    Abstract: A direct type backlight unit includes a metal housing having a base, at least one metal supporting pin and a buffer element. The metal supporting pin is formed integrally on the base and protrudes upwardly therefrom for supporting an optical film disposed upon the backlight unit, and the buffer element is disposed between the metal supporting pin and the optical film so as to prevent the metal supporting pin from damaging the optical film.
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: May 6, 2008
    Assignee: Hannstar Display Corp.
    Inventor: Chih Chieh Hsieh