Patents by Inventor Po-Lun Chen

Po-Lun Chen 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).

  • Publication number: 20060244887
    Abstract: An LCD panel including a first substrate, a second substrate and a smectic liquid crystal layer is disclosed. The first substrate includes a first electrode, a second electrode and a first horizontal alignment film. The first electrode has plural first portions. The second electrode has plural second portions. The first portions are spaced by the second portions. The electrical field directions formed between the first portions and the second portions are perpendicular to the surface of the first substrate. The electrical field direction on each first portion is opposite to that on each second portion. The first horizontal alignment film covers the first and the second electrodes. The second substrate includes a second horizontal alignment film. The horizontal rubbing direction of the first horizontal alignment film is parallel to that of the second horizontal alignment film. The smectic liquid crystal layer is sealed between the first and the second substrates.
    Type: Application
    Filed: August 25, 2005
    Publication date: November 2, 2006
    Inventors: Tzu-Yuan Lin, Ren-Hung Huang, Po-Chang Wu, Shwu-Yun Tsay, Shune-Long Wu, Chia-Hsing Sun, Jin-Jei Wu, Po-Lun Chen, Ai-Sen Liu
  • Patent number: 7123225
    Abstract: A method of driving an active matrix liquid crystal display (AM-LCD) is provided. The AM-LCD has a plurality of unit pixels arranged in array form, and each the unit pixel has a pixel electrode, an opposite common electrode, and a liquid crystal layer disposed therebetween. The method comprises the following steps. First, an alternating voltage signal V(n) with a selected gray level n is applied to the pixel electrode. A first compensated voltage signal V?(n) is applied to the pixel electrode simultaneously to compensate the alternating voltage signal V(n) for the potential level shift induced by the parasitic capacitance and the coupling capacitance of the unit pixel. A second compensated voltage signal Vasy(n) is applied to the pixel electrode simultaneously to compensate the alternating voltage signal V(n) for the potential level shift induced by the different material or the asymmetric appearance of the pixel electrode and the common electrode.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: October 17, 2006
    Assignee: AU Optronics Corp.
    Inventor: Po-Lun Chen
  • Publication number: 20060215097
    Abstract: An array substrate capable for a liquid crystal display (LCD). A pixel electrode is disposed in a pixel region of a substrate, which comprises at least one slit. A storage capacitor is disposed between the substrate and the pixel electrode, which comprises a bottom electrode, a capacitor dielectric layer, and a top electrode. The bottom electrode is disposed in the pixel region, creating an overlap region with the slit. The capacitor dielectric layer and the top electrode are successively disposed on the bottom electrode, in which the top electrode comprises at least one recess region to partially expose the overlap region.
    Type: Application
    Filed: July 7, 2005
    Publication date: September 28, 2006
    Inventors: Ming-Chou Wu, Jenn-Jia Su, Cheng-Han Tsao, Po-Lun Chen
  • Publication number: 20060203147
    Abstract: Liquid crystal displays and fabrication methods thereof. The liquid crystal display comprises a first substrate with an active matrix of a plurality of pixels. A second substrate is provided opposing the first substrate. A liquid crystal layer is interposed between the first substrate and the second substrate. Each pixel comprises a polymer dispersed liquid crystal layer corresponding to a first liquid crystal region and a non-polymer dispersed liquid crystal layer corresponding to a second liquid crystal region.
    Type: Application
    Filed: October 4, 2005
    Publication date: September 14, 2006
    Inventors: Yi-Ju Chen, Chia-Yu Lee, Chieh-Ting Chen, Po-Lun Chen
  • Patent number: 7102717
    Abstract: A transflective liquid crystal display device implementing a color filter having various thicknesses. An insulating layer is formed on a lower substrate. A lower electrode is formed on the insulating layer, wherein the lower electrode has a transmissive portion and a reflective portion. An upper substrate opposing the lower substrate is provided, wherein a side of the upper substrate has a color filter having various thicknesses. A planarization layer is formed on the color filter, wherein the planarization layer is opposite to the lower substrate. An upper electrode is formed on the planarization layer. A liquid crystal layer is interposed between the upper and lower substrates.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: September 5, 2006
    Assignee: AU Optronics Corp.
    Inventors: Ming-Chin Chang, Yang-En Wu, Po-Lun Chen, Chih-Jen Hu, Ching-Huan Lin
  • Publication number: 20060187394
    Abstract: A wide viewing angle liquid crystal display (LCD) panel comprising an upper substrate, a lower substrate, and a liquid crystal (LC) layer is provided. The upper substrate is assembled above the lower substrate. The LC layer is interposed between the two substrates. The LC layer has LC molecules mixed with a predetermined percentage of negative anisotropic monomers. The optical axes of the monomers and the LC molecules as the LCD panel in dark state forms an angle less than 10 degree.
    Type: Application
    Filed: February 3, 2006
    Publication date: August 24, 2006
    Inventors: Po-Lun Chen, Ting-Jui Chang, Chih-Wen Chen
  • Publication number: 20060158587
    Abstract: A light channeling layer disposed adjacent to the bottom substrate of a transflective display to enhance the back-lighting efficiency. The transflective display has a transmissive area and a reflective area and the transmissive area has a transmission electrode. The light channeling layer comprises a plurality of light conduits, each of which is disposed behind a transmission electrode. The light conduit has a first aperture and a second aperture greater than the first aperture and the first aperture is positioned adjacent to the transmission electrode and a second aperture adjacent to the back substrate, so that light from a back-light source that enters into the light conduct through the second aperture is channeled to the transmission electrode through the first aperture.
    Type: Application
    Filed: January 20, 2005
    Publication date: July 20, 2006
    Inventors: Chih-Ming Chang, Ching-Yu Tsai, Ching-Huan Lin, Kuo-Yu Huang, Yi-Pai Huang, Yung-Shun Yang, Han-Ping Shieh, Po-Lun Chen
  • Publication number: 20060152654
    Abstract: An LCD panel includes an array substrate, a color filter substrate positioned above the array substrate, a dielectric layer disposed on the array substrate facing the color filter substrate, and a liquid crystal layer interposed between the array substrate and the color filter substrate. The color filter substrate includes a plurality of red pixel regions, green pixel regions, and blue pixel regions, and the dielectric layer has different thickness corresponding to the red pixel regions, the green pixel regions, and the blue pixel regions. Accordingly, the liquid crystal layer has a first thickness corresponding to the blue pixel regions, a second thickness corresponding to the green pixel regions, and a third thickness corresponding to the red pixel regions. The first thickness is less than the second thickness, and the second thickness is less than the third thickness.
    Type: Application
    Filed: April 25, 2005
    Publication date: July 13, 2006
    Inventors: Hsiu-Chi Tung, Chih-Ming Chang, Po-Lun Chen
  • Publication number: 20060146250
    Abstract: An LCD device having adjustable viewing angles includes a first substrate, a second substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. The first substrate has a first common electrode. The second substrate has a pixel electrode, a second common electrode, and an insulating layer formed between the pixel electrode and the second common electrode. While in a narrow viewing angle mode of the LCD device, a driving voltage is applied to the pixel electrode, the first common electrode is grounded, and the second common electrode is floating. While in a wide viewing angle mode of the LCD device, a driving voltage is applied to the pixel electrode, the second common electrode is grounded, and the first common electrode is floating.
    Type: Application
    Filed: July 26, 2005
    Publication date: July 6, 2006
    Inventors: Ming-Chou WU, Yung-Lun Lin, Meng-Chang Tsai, Po-Lun Chen
  • Publication number: 20060139280
    Abstract: A pixel structure of a liquid crystal display (LCD) panel including an upper substrate, a lower substrate, an LC layer, and a common electrode layer is provided. The LC layer is interposed between the upper substrate and the lower substrate. The common electrode layer is formed on a lower surface of the upper substrate and has at least a separating structure to divide the common electrode layer into several zones including a first zone and a second zone applied with different common voltage levels within a pixel structure.
    Type: Application
    Filed: December 23, 2005
    Publication date: June 29, 2006
    Inventors: Jenn-Jia Su, Ming-Feng Tien, Ming-Chou Wu, Po-Lun Chen
  • Publication number: 20060109405
    Abstract: A multi-domain vertical alignment liquid crystal display panel comprising a first substrate, a second substrate, a liquid crystal layer and a plurality of phase-compensating protrusions is provided. The second substrate is configured above the first substrate. The liquid crystal layer is formed between first substrate and the second substrate. The phase-compensating domain regulating protrusions are formed on at least one of the first substrate and the second substrate. The phase-compensating domain regulating protrusions have a plurality of anisotropic birefringence molecules. The slow-axes of the anisotropic birefringence molecules are in a different direction from the slow-axes of the liquid crystal molecules near the phase-compensating protrusions. Therefore, the plurality of anisotropic birefringence molecules can compensate for the phase retardation here, thereby improving the light leakage in the dark state.
    Type: Application
    Filed: April 8, 2005
    Publication date: May 25, 2006
    Inventors: Ting-Jui Chang, Po-Lun Chen
  • Patent number: 6999144
    Abstract: A transflective liquid crystal device capable of balancing a color difference between a reflective region and a transmissive region. The arrangement conditions of optical elements in the transflective LCD are as follows. The twist angle of the liquid crystal is about 40°˜80°. The angles ?up, ?down, ?up and ?down are about ?20°˜?60°, ?20°˜20°, 60°˜110°, ?30°˜20° respectively. The angle between the retardation axes of the upper ?/2 plate and the upper ?/4 plate is about 30°˜100°, and the angle between the retardation axes of the lower ?/2 plate and the lower ?/4 plate is about 30°˜80°.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: February 14, 2006
    Assignee: AU Optronics Corporation
    Inventors: Yang-En Wu, Po-Lun Chen
  • Publication number: 20060023156
    Abstract: A liquid crystal display (LCD) panel using a slanted electric field to control the inclination direction of liquid crystal (LC) molecules and a method of fabricating the same are disclosed. The asymmetrical bumps made of material with high dielectric constant are formed on the lower substrate, thereby improving the displaying quality of the LCD panel. After a potential difference is applied to the substrates of the LCD, a slanted electric field is generated due to the formation of asymmetrical bumps, so as to control the inclination direction of LC molecules. Also, the electrode layer could be formed over the asymmetric bumps, or formed between the asymmetric bumps and the bottom substrate.
    Type: Application
    Filed: February 23, 2005
    Publication date: February 2, 2006
    Inventors: Yung-Lun Lin, Jenn-Jia Su, Chih-Jen Hu, Ming-Chou Wu, Po-Lun Chen
  • Publication number: 20050264717
    Abstract: A three-dimensional (3D) display system includes a liquid crystal display and a directional backlight module. The backlight module disposed behind the liquid crystal display includes a light-guide plate, a focusing layer, a left backlight source, a right backlight source, and a first V-shaped micro-grooved and a second V-shaped micro-grooved structures of the light-guide plate. The focusing layer is disposed between the light-guide plate and the liquid crystal display. The 3D display method is to instantly switch on and off the left and the right backlight sources to alternately emit the light from the left side and right side of light-guide plate. By means of the first and the second V-shaped micro-grooved structure, the light transmitted from the light-guide plate is focused by the focusing layer within a particular range of angles and passing through the liquid crystal layer for being alternately projected to form a 3D image.
    Type: Application
    Filed: January 4, 2005
    Publication date: December 1, 2005
    Inventors: Ko-Wei Chien, Han-Ping Shieh, Yu-Mioun Chu, Ching-Yu Tsai, Yung-Lun Lin, Chih-Jen Hu, Chih-Ming Chang, Yi-Cheng Hsu, Po-Lun Chen
  • Publication number: 20050227396
    Abstract: A method for warming-up an LCD system which includes a pixel array having a plurality of pixel units. Each pixel unit includes a pixel electrode, and a TFT (thin film transistor) provide with a source and a gate such that a gate signal inputted into the gate can switch on and switch off the TFT so as to permit transfer of a data signal from the source to the pixel electrode. The method includes the steps: floating the source of the TFT; and applying the gate signal onto the gate which is coupled to the pixel electrode in such a manner that the pixel electrode possesses a voltage level which is substantially equal to that of the gate signal.
    Type: Application
    Filed: March 3, 2005
    Publication date: October 13, 2005
    Inventors: Ting-Jui Chang, Po-Lun Chen
  • Publication number: 20050094075
    Abstract: A multi-domain vertical alignment thin film transistor liquid crystal display (MVA TFT-LCD) device is disclosed. The MVA TFT-LCD comprises a MVA TFT-LCD panel, a first wide viewing film (WV film), a first polarizer film, a second WV film, and a second polarizer film. The first WV film is on the first surface of the MVA TFT-LCD panel. The first polarizer film is on the first WV film, wherein diffusive patterns are formed on surface of the first polarizer. The second WV film is on the second surface of the MAV TFT-LCD panel. The second polarizer film is on the second WV film. The MVA TFT-LCD of the invention can reduce the issues of color shift and color washing out resulting from the change of the view angle.
    Type: Application
    Filed: February 23, 2004
    Publication date: May 5, 2005
    Applicant: AU OPTRONICS CORPORATION
    Inventor: Po-Lun Chen
  • Publication number: 20040233358
    Abstract: A transflective liquid crystal device capable of balancing a color difference between a reflective region and a transmissive region. The arrangement conditions of optical elements in the transflective LCD are as follows. The twist angle of the liquid crystal is about 40°˜80°. The angles &bgr;up, &bgr;down, &thgr;up and &thgr;down are about −20°˜−60°, −20°˜20°, 60°˜110°, −30°˜20° respectively. The angle between the retardation axes of the upper &lgr;/2 plate and the upper &lgr;/4 plate is about 30°˜100°, and the angle between the retardation axes of the lower &lgr;/2 plate and the lower &lgr;/4 plate is about 30°˜80°.
    Type: Application
    Filed: March 11, 2004
    Publication date: November 25, 2004
    Inventors: Yang-En Wu, Po-Lun Chen
  • Publication number: 20040227719
    Abstract: A transflective liquid crystal display device. A first substrate having viewing and peripheral areas is provided. The viewing area comprises transmissive and reflective regions. A backlight device is disposed under the first substrate, used to provide a backlight passing through the transmissive region. A power management controller connects the backlight device to control an intensity of the backlight. At least one photodetector is formed on the first substrate in the peripheral area, wherein the photodetector detects an intensity of ambient light above the first substrate, and then provides a corresponding signal to the power management controller to control the intensity of the backlight. According to the invention, the intensity of the backlight automatically becomes greater when the intensity of the ambient light becomes lower, and the intensity of the backlight automatically becomes lower when the intensity of the ambient light becomes greater.
    Type: Application
    Filed: October 31, 2003
    Publication date: November 18, 2004
    Inventors: Ming-Chin Chang, Yang-En Wu, Po-Lun Chen
  • Publication number: 20040178982
    Abstract: A method of driving an active matrix liquid crystal display (AM-LCD) is provided. The AM-LCD has a plurality of unit pixels arranged in array form, and each the unit pixel has a pixel electrode, an opposite common electrode, and a liquid crystal layer disposed therebetween. The method comprises the following steps. First, an alternating voltage signal V(n) with a selected gray level n is applied to the pixel electrode. A first compensated voltage signal V′(n) is applied to the pixel electrode simultaneously to compensate the alternating voltage signal V(n) for the potential level shift induced by the parasitic capacitance and the coupling capacitance of the unit pixel. A second compensated voltage signal Vasy(n) is applied to the pixel electrode simultaneously to compensate the alternating voltage signal V(n) for the potential level shift induced by the different material or the asymmetric appearance of the pixel electrode and the common electrode.
    Type: Application
    Filed: May 2, 2003
    Publication date: September 16, 2004
    Applicant: AU Optronics Corporation
    Inventor: Po-Lun Chen
  • Patent number: 6760087
    Abstract: A multi-domain vertical alignment liquid crystal display, having a substrate with a color filter, a liquid crystal layer and a thin-film transistor array substrate. The thin-film transistor array substrate has an array of thin-film transistors and pixel electrodes. The pixel electrodes have a plurality of protrusions and slits, and a dielectric layer with a planarized surface covering the pixel electrodes. Therefore, the dielectric layer on the protrusion is thinner. Or alternatively, the protrusions are exposed. The exposed protrusions being alternately arranged with the slits and the dielectric layer result in a planarization effect, and have the function of twisting the electric field generated by the pixel electrodes. The liquid crystal molecules are thus inclined towards different directions to divide the liquid crystal layer of the same pixel electrode into multi-domains.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: July 6, 2004
    Assignee: AU Optronics Corporation
    Inventors: Ivan Yang-En Wu, Po-Lun Chen