Patents Assigned to Himax Technologies, Inc.
  • Patent number: 7061078
    Abstract: A semiconductor package includes a chip and a carrier. The chip has an active surface and a lateral surface. The active surface has a number of first bumps and a number of second bumps. The first bumps are spaced by the second bumps. The first bumps are farther from the lateral surface than the second bumps are. The carrier has a base and a number of first inner leads. Each first inner lead has a body portion and a distal end bonding portion. The width of the body portion is smaller than that of the distal end bonding portion. The distal end bonding portions are electrically bonded to the first bumps such that the chip is disposed on the carrier, and each of the body portions is located between the two adjacent second bumps.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: June 13, 2006
    Assignee: Himax Technologies Inc.
    Inventor: Pai-Sheng Cheng
  • Patent number: 7053632
    Abstract: A circuit for predicting the dead time is provided. The circuit includes a plurality of integrators, a plurality of comparators, and a logic circuit. Based on a reference signal provided externally, a first charging operation is delayed by a predetermined delay time during one period of the reference signal, such that the integrators maintain at a voltage level in a next period of the reference signal. Then, the integrators further perform another charging operation during the next period, and the charging voltage is compared with the maintained voltage value. When the charging voltage exceeds the maintained voltage, a reset signal is generated by the logic circuit.
    Type: Grant
    Filed: April 28, 2005
    Date of Patent: May 30, 2006
    Assignee: Himax Technologies, Inc.
    Inventors: Shen-Yao Liang, Hung-Sung Chu, Kun-Cheng Hung
  • Patent number: 7050033
    Abstract: Disclosed is a source driver for receiving an input voltage and generating an output voltage to drive a data line in a liquid crystal display apparatus. In the source driver, first and second P-channel MOS transistors are together used as a primary source follower to trace the input voltage thereby eliminating the body effect and keeping the loading charge loss constant. First and second N-channel MOS transistors are used, as a secondary source follower. A capacitor is used for boosting the voltage of the drain of the first N-channel MOS transistor on the level of at least the input voltage plus the threshold voltage of the N-channel MOS transistor. In addition, an extra switch is used to reach the accurate output voltage when the output voltage is approaching the input voltage.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: May 23, 2006
    Assignee: Himax Technologies, Inc.
    Inventor: Ming Cheng Chiu
  • Patent number: 7045258
    Abstract: A color filter comprising first filtering units, second filtering units, and third filtering units is provided. The first filtering unit is manufactured according to a number of first pattern of a first mask, wherein each of the first patterns comprises a first main pattern portion and a number of first compensating portions. The second filtering unit is manufactured according to a number of second patterns of the second mask. The first compensating portions enable each first filtering unit to be smoothly coupled with the adjacent second filtering unit.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: May 16, 2006
    Assignee: Himax Technologies Inc.
    Inventors: Wei-Hsiao Chen, Meng-Hsun Hsieh
  • Publication number: 20060094152
    Abstract: A CMOS power sensor is disclosed in the present invention. The CMOS power sensor includes a current coil, a high voltage device circuit, and a Hall device. The current coil is fabricated during the process steps of forming gold bumps of a CMOS device. One end of the current coil is connected to a voltage source, and the other end of the current coil is connected to a load. The high voltage device circuit is connected to the voltage source. The Hall device is connected to the high voltage device circuit and induces a Hall voltage in response to the magnetic field generated by the current coil.
    Type: Application
    Filed: December 14, 2005
    Publication date: May 4, 2006
    Applicant: Himax Technologies, Inc.
    Inventor: Hung-Ming Yang
  • Patent number: 7006071
    Abstract: A serial driving device for driving a passive module according to a number of digital pixel data is provided. The serial driving device includes a digital-to-analog converting unit, an analog buffer, a shift register, and an output buffer unit. The digital-to-analog converting unit is used for outputting a number of analog pixel data in series according to the digital pixel data. The pixel data output from the digital-to-analog converting unit is then processed by the analog buffer, the shift register, and the output buffer. The output buffer unit includes a number of driving sub-units for receiving the analog pixel data from the analog buffer in parallel. Each driving sub-units includes an output buffer, a primary switch, and a secondary switch.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: February 28, 2006
    Assignee: Himax Technologies, Inc.
    Inventor: Lin-Kai Bu
  • Patent number: 7006066
    Abstract: The driving circuit of a liquid crystal cell structure consists essentially of first and second write-enable transistors, first and second storage capacitors, first and second display-enable transistors, and a reset/preset transistor. When one of the display-enable transistors is turned on such that the video data saved in the corresponding storage capacitor is loaded into the mirror electrode for display, the other corresponding write-enable transistor is turned on simultaneously to pre-load the next video data into the corresponding storage capacitor. When the first and second display-enable transistors both are turned off, the reset/preset transistor is turned on to set the liquid crystal in the reset/preset voltage, wherein the reset/preset voltage is based on the overdrive voltage of the arrangement of the liquid crystal before next sub-frame time so as to increase the response rate of the liquid crystal cell.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: February 28, 2006
    Assignee: Himax Technologies, Inc.
    Inventors: Yen Chen Chen, Bing Jei Liao, Ying Chou Tu
  • Patent number: 7004587
    Abstract: A projection display apparatus includes a light source configured to supply light; a polarizing beam splitter for splitting light from the light source into two different polarization state lights; two reflective light panels of which each has a color filter embedded therein and respectively modulates the two polarization state lights so as to simultaneously produce red, green and blue image lights; and a projection lens receiving these color image lights and then projecting them onto a viewing surface so as to form a full-color image.
    Type: Grant
    Filed: January 28, 2004
    Date of Patent: February 28, 2006
    Assignee: Himax Technologies, Inc.
    Inventors: Kuo Yuin Li, Yen Chen Chen
  • Patent number: 6965265
    Abstract: A driving apparatus for receiving an input voltage at an input terminal and generating an output voltage at an output terminal. The apparatus includes an output buffer electrically coupled between the input and output terminal, and an operational amplifier electrically coupled between the input and the output terminal, and selectively turned on to drive the output voltage to a voltage level substantially the same as the input voltage.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: November 15, 2005
    Assignee: Himax Technologies, Inc.
    Inventors: Wei-Hung Chang, Ming-Cheng Chiu
  • Patent number: 6961036
    Abstract: A single polar driving method for a cholesteric liquid crystal display. The method comprises the steps of selecting the pixels by applying a first signal switching between a ground and a first level to the common line of the selected pixels, driving the selected pixels into a reflecting state by applying a second signal out of phase with the first signal and that switches between a second and third levels to the segment lines thereof, driving the selected pixels into a transparent state by applying a third signal in phase with the first signal and that switches between the second and third levels to the segment lines thereof, and deselecting the pixels by applying a fourth signal fixed at a fourth level to the common lines thereof.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: November 1, 2005
    Assignee: Himax Technologies, Inc.
    Inventors: Chien-Pin Chen, Sheng-Ren Chiu, Chia-Cheng Lai, Yen-Chen Chen
  • Patent number: 6914649
    Abstract: The present invention relates to a color filter with mosaic pixel array arrangement. The color filter comprises a plurality of pixel arrays. The pixel array has four sub-pixels. The color of the sub-pixel of the pixel array is identical to that of another sub-pixel of another pixel array adjacent to the pixel array. The sub-pixels with same color form a sub-pixel group so that the area of a single color of the sub-pixel group is increased. Therefore, the adhesion strength between the sub-pixel group and the substrate can be augmented to avoid peeling from the substrate. According to the invention, the yield rate of the product will be raised and the chromaticity will be improved.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: July 5, 2005
    Assignee: Himax Technologies, Inc.
    Inventor: Chung-Yuan Liu
  • Patent number: 6873660
    Abstract: A data transmitter for converting single-ended data to differential data has the advantages of energy saving, being able to precisely control the common-mode level, and being wide in operational frequency width. An NMOS transistor is employed as a source follower to provide current flowing to conduction paths, and a PMOS transistor is also employed as another source follower to discharge the current of the conduction paths.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: March 29, 2005
    Assignee: Himax Technologies, Inc.
    Inventor: Lin-kai Bu
  • Patent number: 6861749
    Abstract: A semiconductor device comprises a substrate having contact pads each covered by under bump metallurgy and a plurality of bump electrodes respectively provided on the under bump metallurgy covering the contact pads. According to one embodiment of the present invention, the semiconductor device is characterized by having at least one contact pad (e.g., a test contact pad) which is not provided with any bump electrode but still has under bump metallurgy provided thereon. According to another embodiment of the present invention, the semiconductor device is characterized by having at least a conductive line formed of the same material as the under bump metallurgy for interconnecting at least two of the contact pads. The present invention further provides methods of manufacturing the semiconductor devices.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: March 1, 2005
    Assignee: Himax Technologies, Inc.
    Inventors: Chia-Hui Wu, Biing-Seng Wu, Ying-Chou Tu
  • Patent number: 6853362
    Abstract: A method for driving an LCD with class-A operational amplifiers. The LCD has a positive operational amplifier for driving pixels with positive voltages, a negative operational amplifier for driving pixels with negative voltages, and a detector. The method includes using the detector to determine which operational amplifier is to be used to drive a next pixel. If the next pixel need be displayed with a positive voltage, then the positive operational amplifier is used to drive the next pixel. If the next pixel need be displayed with a negative voltage, then the negative operational amplifier is used to drive the next pixel.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: February 8, 2005
    Assignee: Himax Technologies, Inc.
    Inventor: Lin-Kai Bu
  • Patent number: 6850305
    Abstract: In this invention a layout structure for a liquid crystal display, which includes a first data line, a second data line, a first scan line, a second scan line, a third scan line, and a first and second pixel. The first pixel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel. The first sub-pixel is coupled to the first data line and first scan line. The second sub-pixel is coupled to the second data line and first scan line. The third sub-pixel is coupled to the second data line and second scan line. The second pixel includes a fourth sub-pixel, a fifth sub-pixel, and a sixth sub-pixel. The fourth sub-pixel is coupled to the first data line and second scan line. The fifth sub-pixel is coupled to the first data line and third scan line. The sixth sub-pixel is coupled to the second data line and third scan line.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: February 1, 2005
    Assignee: Himax Technologies, Inc.
    Inventors: Wen-Han Hsieh, Yen-Chen Chen
  • Patent number: 6836232
    Abstract: A gamma correction apparatus for a liquid crystal display comprises a reference voltage generating circuit and a gamma correction circuit. The reference voltage generating circuit outputs a plurality of reference voltages according to the pixel data. The gamma correction circuit gamma-corrects the pixel data according to the reference voltages. The feature of the invention resides in that the reference voltage generating circuit outputs the corresponding reference voltages to gamma-correct the pixel data according to the positions of the pixels corresponding to the pixel data in the LCD monitor and the display colors of the pixels.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: December 28, 2004
    Assignee: Himax Technologies, Inc.
    Inventor: Lin-Kai Bu
  • Patent number: 6809541
    Abstract: A testing method and a testing a voltages apparatus embedded in the scribe line on a wafer are disclosed, for testing the to be measured from a die on a wafer. The testing apparatus includes a multiplexer and a comparator. The multiplexer receives the voltages to be measured and outputs a multiplexing or selected voltage according to a selection signal. The comparator receives a reference voltage and the multiplexing voltage and then outputs a digital result by comparing the reference voltage, and the multiplexing voltage. The digital result can be applied to a digital testing machine, such that testing speed is increased and testing cost is decreased. Moreover, the testing apparatus embedded in the scribe lines has the capability to compensate for the comparator's offset, and accordingly, the testing reliability is also improved.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: October 26, 2004
    Assignee: Himax Technologies, Inc.
    Inventors: Lin-Kai Bu, Kun-Cheng Hung
  • Publication number: 20040207587
    Abstract: The present invention relates to a driving method for cholesteric liquid crystal display. A plurality of pixels of the display are controlled by a plurality of row drivers and a plurality of column drivers. According to the method of the invention, firstly, a DC input voltage or a non-symmetric AC input voltage is applied to the row drivers and the column drivers so that the voltage of the pixel is larger than a withstand voltage of the drivers. Then, an initial column signal and an initial row signal are respectively supplied by the corresponding column driver and row driver so as to initialize the corresponding pixel. The polarity of the initial column signal is different from that of the initial row signal. Because the initial row signal minus the initial column signal equals the signal of the pixel, the amplitude of the signal applied to the pixel can be increased.
    Type: Application
    Filed: April 16, 2004
    Publication date: October 21, 2004
    Applicant: Himax Technologies, Inc.
    Inventors: Yen-Chen Chen, Chien-Pin Chen, Chia-Cheng Lai
  • Patent number: 6806515
    Abstract: A layout structure of a decoder with m*n nodes and the method thereof are provided. The nodes comprise a plurality of transistor nodes and a plurality of channel nodes. The manufacturing method of the transistor node comprises forming a gate, a first source/drain region and a second source/drain region. The channel node is fabricated by forming a channel. The channel, the first source/drain region and the second source/drain region are formed at the same time with the same material. The decoder circuit with smaller width is accomplished without additional mask in the invention.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: October 19, 2004
    Assignee: Himax Technologies, Inc.
    Inventors: Chuan-Cheng Hsiao, Lin-Kai Bu, Kun-Cheng Hung, Chien-Pin Chen
  • Patent number: 6788365
    Abstract: A liquid crystal display (LCD) with slant structures is disclosed. The LCD includes a first plate, a second plate opposite to the first plate and a liquid crystal layer between the first plate and the second plate. The first plate further includes a first alignment film over the first plate and the first alignment film has an indication direction. The second plate includes a number of pixels. Each of the pixels includes the following from the bottom to the top: a pixel electrode, a reflector, a thin film layer consisting of a number of thin films, and a second alignment film. The thin films are formed by photolithography and the thin film layer and the second alignment film together form one slant structure with a single inclined side.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: September 7, 2004
    Assignee: Himax Technologies, Inc.
    Inventors: Bing-Jei Liao, Chung-Yuan Liu