Patents Assigned to TPO Display Corp.
  • Patent number: 7265582
    Abstract: A level shifter is provided. The level shifter includes a first input transistor, a second input transistor, a first bias transistor, a second bias transistor, a first switch transistor and a second switch transistor. At the time of change of the signal status, by raising the potential of the body terminal of the first input transistor, the threshold voltage is reduced so that the current flowing through the second input transistor is increased to shorten the time of the change of the signal status.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: September 4, 2007
    Assignee: TPO Displays Corp.
    Inventors: Wei-Jen Hsu, Ming-Dou Ker, Ying-Hsin Li, An Shih
  • Patent number: 7265801
    Abstract: A display panel includes a first substrate, a second a second substrate a second a second substrate parallel and opposite to the first substrate, a liquid crystal molecules disposed between the first substrate and the second substrate, a first and a second polarizers disposed over the first and the second substrates respectively. The first surface of the first substrate close to the liquid crystal molecules and a second surface of the second substrate close to the liquid crystal molecules includes a first alignment surface and a second alignment surface, wherein an angle between the alignment directions of the first and the second alignment surfaces is in a range of about 90°. The angle between a direction of the absorption axis of the first polarizer/the second polarizer and the alignment direction of the first alignment surface/the second alignment surface is in a range of about 45° respectively.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: September 4, 2007
    Assignee: TPO Displays Corp.
    Inventor: Chi-Huang Lin
  • Patent number: 7242396
    Abstract: A method of charging a liquid crystal display (LCD) device that includes providing a plurality of scan lines, providing a plurality of video lines formed orthogonal to the scan lines, providing a plurality of cells, each cell including a transistor and a capacitor coupled to the transistor, each of the cells being formed at an intersection of the scan lines and video lines, providing a periodic signal for writing video data into the LCD device, charging the plurality of cells having first-type transistors during a first half cycle of the periodic signal until a first voltage level of the periodic signal is reached, charging the plurality of cells having second-type transistors during a second half cycle of the periodic signal until a second voltage level of the periodic signal is reached, and discharging the plurality of cells to a predetermined voltage level.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: July 10, 2007
    Assignee: TPO Displays Corp.
    Inventors: Ya-Hsiang Tai, Chaung-Ming Chiu
  • Patent number: 7238963
    Abstract: A self-aligned LDD TFT and a fabrication method thereof. A substrate is provided, on which a semiconductor layer is formed. A first masking layer is provided over a first region of the portion of the semiconductor layer. The first masking layer includes a material that provides a permeable barrier to a dopant. The semiconductor layer including the first region covered by the first masking layer is exposed to the dopant, wherein the first region covered by the first masking layer is lightly doped with the dopant in comparison to a second region not covered by the first masking region.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: July 3, 2007
    Assignee: TPO Displays Corp.
    Inventors: Shih Chang Chang, De-Hua Deng, Chun-Hsiang Fang, Yaw-Ming Tsai, Chang-Ho Tseng
  • Patent number: 7239365
    Abstract: An array substrate for a transflective liquid crystal display device is disclosed. The array substrate includes a substrate; a plurality of scanning lines and data lines on the substrate, crossing each other to define a plurality of pixel regions; a transmissive electrode disposed in the transmission region; and a reflector disposed in the reflection region and not subjected to a voltage. A lateral field is generated in the reflection region. The transflective LCD of the present invention achieves the maximum light efficiency in both reflection and transmission modes.
    Type: Grant
    Filed: November 9, 2004
    Date of Patent: July 3, 2007
    Assignee: TPO Displays Corp.
    Inventors: Wei-Chih Chang, Li-Sen Chuang
  • Patent number: 7224419
    Abstract: The present invention provides a liquid crystal display device to protect device users from EMI coming from the liquid crystal display panel. The liquid crystal display device of the present invention comprises: a first substrate, wherein the substrate has a black matrix; a second substrate; a liquid crystal layer between the first substrate and the second substrate; and a first electro-magnetic interference shield layer on the first substrate, wherein the position of the first electro-magnetic interference shield layer corresponds to the position of the black matrix.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: May 29, 2007
    Assignee: TPO Displays Corp.
    Inventor: Che-Kuei Mai
  • Patent number: 7221914
    Abstract: A flip-cover mobile phone with cover-on talking capability. The phone has a plurality of buttons on the front surface of the phone but can be hidden away by the cover. The surface of the phone further includes a loudspeaker, a microphone, a communication on/off button and a touch-sensitive screen. Incoming calls can be received simply by pressing the communication on/off button so that talking is possible with the cover on. With the addition of a touch-sensitive screen, the phone may be operated without lifting the flip cover.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: May 22, 2007
    Assignee: TPO Displays Corp.
    Inventors: Shyuan-Jeng Ho, Ching-Tung Wang
  • Patent number: 7221194
    Abstract: Analog buffers with a precise gate to source voltage compensation and a small DC offset, by storing an input offset voltage to be used as an output offset voltage to reverse the offset in the input. A first source follower at the input end and a second source follower at the output end are both coupled to a switching circuit, wherein the first follower provides an input offset voltage (e.g., |Vgsp|) based on the input voltage (Vin), the second source follower provides an output voltage (Vout) by compensating Vin transmitted through the analog buffer circuit with an output offset voltage (|Vgsn|), and the switching circuit stores and equalizes the output offset voltage to the input offset voltage (|Vgsp|=|Vgsn|), so to obtain an output Vout that is identical to Vin.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: May 22, 2007
    Assignee: TPO Displays Corp.
    Inventors: Ching-Wei Lin, Chueh-Kuei Jan, Meng-Hsun Hsieh
  • Patent number: 7209191
    Abstract: A liquid crystal display is provided. The liquid crystal display includes a common electrode, a liquid crystal layer, a data line, a transmissive electrode, a reflective electrode, an auxiliary electrode and a dielectric layer. The transmissive electrode is electrically connected to the data line and defines a first capacitor device along with the liquid crystal layer and the common electrode. The reflective electrode defines a second capacitor device along with the liquid crystal layer and the common electrode. The auxiliary electrode is electrically connected to the transmissive electrode. The dielectric layer is disposed between the auxiliary electrode and the reflective electrode and defines a third capacitor device along with the auxiliary electrode and the reflective electrode. The third capacitor device is electrically connected to the second capacitor device in series.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: April 24, 2007
    Assignee: TPO Displays Corp.
    Inventor: Wei-Chih Chang
  • Patent number: 7199778
    Abstract: A switching signal generator of an active matrix display is disclosed. The switching signal generator includes at least one delay device connected to the switches of the active matrix display. The delay device consists of many delay units connected in series for receiving a source switching signal and correspondingly generating a plurality of target switching signals controlling the switches. There is a constant phase shift between any two successive target switching signals so that the switches are switched on one by one at regular intervals.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: April 3, 2007
    Assignee: TPO Displays Corp.
    Inventors: Ching-Ching Chi, Hsiao-Yi Lin
  • Patent number: 7186350
    Abstract: A method for removing color resist from an exposure alignment mark. In an embodiment, a color resist layer is formed over a color filter substrate with an alignment mark thereon. A concentric tube system is provided with an outer tube surrounding an inner tube. A solvent is injected via the inner tube to contact and dissolve the color resist directly overlying the alignment mark. The dissolved color resist is extracted by the outer tube of the concentric tube system to expose the alignment mark. By repeating the dissolving and extraction steps, all alignment marks on the color filter substrate are consequently uncovered for subsequent exposure alignment.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: March 6, 2007
    Assignee: TPO Displays Corp.
    Inventor: Chi-Ming Cheng
  • Patent number: 7183700
    Abstract: An organic light emitting diode (OLED) display includes a substrate defined with a plurality of pixel areas, a heating circuit structure disposed on the substrate, and a plurality of OLEDs corresponding to each pixel area. The heating circuit structure includes two conductive lines not connected to each other, a plurality of heating lines electrically connected to the two conductive lines and covering portions of each pixel areas, and a ground electrode.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: February 27, 2007
    Assignee: TPO Displays Corp.
    Inventors: Wen-Yuan Guo, Wei-Chieh Hsueh, An Shih, Shih-Chang Chang
  • Patent number: 7180560
    Abstract: A transflective liquid crystal display has a plurality of pixel electrode layers corresponding to a plurality of color elements. A first pixel electrode layer has a first reflective region and a first transmissive region. A second pixel electrode layer has a second reflective region and a second transmissive region. A third pixel electrode layer has a third reflective region and a third transmissive region. The first reflective region is larger than the second reflective region, and the first reflective region is larger than the third reflective region.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: February 20, 2007
    Assignee: TPO Displays Corp.
    Inventors: Li-Sen Chuang, Wei-Chih Chang, Chia-Yi Tsai, Chi-Jain Wen
  • Patent number: 7180156
    Abstract: To satisfy the different requirement of TFTs function as peripheral driving circuit and pixel switching device, the modified TFT structure with various thicknesses of gate insulating layers is disclosed. For the peripheral driving circuit, the thinner thickness of the gate-insulating layer is formed, the higher driving ability the TFT performs. However, for the pixel switching device, the thicker thickness of the gate insulating layer is formed, the better reliability the TFT has. The present invention provides a first TFT (peripheral driving circuit) comprising a first gate insulating layer and a second TFT (pixel switching device) comprising a first and second gate insulating layer. Thus, the gate insulating layer of the peripheral driving circuit has a thickness less then that of the pixel switching device.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: February 20, 2007
    Assignee: TPO Displays Corp.
    Inventors: Shih-Chang Chang, Yaw-Ming Tsai
  • Patent number: 7176618
    Abstract: An organic light-emitting display having an anti-reflective and inert cathode is provided. The cathode is made of a diamond-like carbon material to reduce ambient light reflection and increase contrast. The diamond-like carbon material is an opaque and inert material, so the cathode is anti-reflective and inert.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: February 13, 2007
    Assignee: TPO Displays Corp.
    Inventor: Jui-Fen Pai
  • Patent number: 7156948
    Abstract: A wet etching apparatus is disclosed. The apparatus comprises a first tank, containing a first wet etching solution; a filter, having a filter cartridge, connected to the first tank to filter out the impurities in the first solution; a second etching tank, connected to the filter and the first tank in parallel, containing a second solution; a reaction tank, connected to the filter, wherein having a wet etching reaction; an exhaust component, connected to the filter and the reaction tank in parallel; a first pump, delivering the first solution to the reaction tank through the filter; and a second pump, delivering the second solution to the exhaust component to exhaust the solution from the etching tank through the filter.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: January 2, 2007
    Assignee: TPO Displays Corp.
    Inventors: Chi-An Lin, Kuo-Hung Kuo, Ta-Hsin Kuan, Po-Yi Lo, Ming-Hsien Yang
  • Patent number: 7158065
    Abstract: Signal driving circuits with high driving capability and precise analog output voltage level, by outputting analog voltages through analog buffers and directly outputting voltages from digital-to-analog converters in turn. A digital-to-analog converter generates a first analog voltage according to digital data. An output circuit selectively either outputs a second analog voltage according to the first analog voltage by an analog buffer to a load or outputs the first analog voltage to the load directly.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: January 2, 2007
    Assignee: TPO Displays Corp.
    Inventors: Ching-Wei Lin, Chueh-Kuei Jan, Meng-Hsun Hsieh
  • Patent number: 7145209
    Abstract: A thin film transistor (TFT) with a self-aligned lightly-doped region and a fabrication method thereof. An active layer has a channel region, a first doped region and a second doped region, in which the first doped region is disposed between the channel region and the second doped region. A gate insulating layer formed overlying the active layer has a central region, a shielding region and an extending region. The shielding region is disposed between the central region and the extending region, the central region covers the channel region, the shielding region covers the first doped region, and the extending region covers the second doped region. The shielding region is thicker than the extending region. A gate layer is formed overlying the gate insulating layer, covers the central region and exposes the shielding region and the extending region.
    Type: Grant
    Filed: May 20, 2004
    Date of Patent: December 5, 2006
    Assignee: TPO Displays Corp.
    Inventors: Shih-Chang Chang, De-Hua Deng, Chun-Hsiang Fang, Yaw-Ming Tsai
  • Patent number: 7131188
    Abstract: The touch panel comprises two conductive substrates arranged in parallel and secured to each other with a gap existing between the conductive substrates The process for implementing a conductive tracing layout in a touch panel includes steps of forming a first conductive layer on at least one of the conductive substrates; forming a first photo-resist layer on the first conductive layer; removing a specified portion of the first photo-resist layer to form a first specified mask on a specified portion of the first conductive layer; and removing the first conductive layer except the specified portion of the first conductive layer to form a first conductive tracing layout.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: November 7, 2006
    Assignee: TPO Displays Corp.
    Inventors: Hong-Yu Lin, Yi-Hung Tsai
  • Patent number: 7129153
    Abstract: A process for forming a polycrystalline silicon layer includes the following steps. Firstly, at least one seed is formed on a substrate. Then, an amorphous silicon layer is formed on the substrate and overlies the seed. Then, the amorphous silicon layer is irradiated with a laser to melt the amorphous silicon layer. Afterward, the molten amorphous silicon layer is recrystallized to form a polycrystalline silicon layer.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: October 31, 2006
    Assignee: TPO Displays Corp.
    Inventor: Ching-Wei Lin