Patents Represented by Attorney F. Chau & Assoc., LLC
  • Patent number: 7671910
    Abstract: An interpolator and method for high image resolution by interpolation with adaptive filtering of Bayer pattern color signals, and a digital image signal processor implementing the same. The digital image signal processor can generate interpolation data close to actual pixel data by applying a nonlinear low pass filter (LPF) that reflects the change rate of the data centered around a center pixel and the data of the center pixel, and by simultaneously applying a LPF, a band pass filter (BPF), and a high pass filter (HPF) having linear characteristics, and can generate interpolation data that reduces aliasing (at “edges”) and emphasizes a high frequency component.
    Type: Grant
    Filed: March 15, 2004
    Date of Patent: March 2, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hyung-Guen Lee
  • Patent number: 7643351
    Abstract: An erase voltage generation circuit providing a uniform erase execution time and a non-volatile semiconductor memory device having the same, in which the erase voltage generation circuit includes a high voltage generation unit, a voltage level detection unit, an execution time checking unit and a discharging unit. The high voltage generation unit generates an erase voltage. The voltage level detection unit detects the erase voltage and generates a level detection signal. The level detection signal is activated when the erase voltage reaches a target voltage. The execution time checking unit generates an execution end signal that is activated in response to the lapse of an erase execution time from the activation of the level detection signal. The discharging unit discharges the erase voltage as a discharge voltage.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: January 5, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-Sik Park, Jin-Yub Lee
  • Patent number: 7636398
    Abstract: A channel equalizer obtains channel impulse responses (CIRs) for all subcarriers by way of filtering channel impulse responses of specific subcarriers using at least two filters. One of the two filters may be a low pass filter. At least one other of the at least two filters is implemented as a band pass filter having a variable filtering bandwidth, being available to establish various filtering bandwidths in response to various multi-path channel environments. By improving the performance of channel estimation, equalization may be improved.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: December 22, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyu-Man Lee, Jun Ling Zhang, Masaki Sato
  • Patent number: 7636002
    Abstract: A clock multiplier for multiplying an input clock by N includes a phase/frequency detector, a clock selector, and a voltage-controlled delay line. The phase/frequency detector generates a first control signal and a second control signal according to a frequency/phase difference between the input clock and a count signal indicating a signal that is generated by delaying the input clock N times. The clock selector selects one of the input clock and a feedback clock based on the input clock and the count signal. The voltage-controlled delay line adjusts a delay time of the selected signal according to a control voltage that is generated based on the first control signal and the second control signal, and outputs the feedback clock based on the adjusted signal. The clock multiplier operates without accumulating a frequency/phase difference between the input clock and the output clock when the multiplying ratio is increased.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: December 22, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Woo-Seok Kim
  • Patent number: 7635547
    Abstract: A stencil mask includes a membrane forming thin layer having membrane areas and a border area that limits the membrane areas. The membrane areas have a plurality of pattern areas which include an aperture through which particle beams can permeate and non-pattern areas interposed between the pattern areas. A main strut supports the membrane areas and is formed on the border area of the membrane forming thin layer. An auxiliary strut is formed in the non-pattern areas inside the membrane pattern area such that the auxiliary strut divides the membrane areas into plural divided membrane areas. The auxiliary strut supports the divided membrane areas.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: December 22, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: In-Sung Kim, Ho-Chul Kim
  • Patent number: 7633337
    Abstract: A feedback-type variable gain amplifier including a first field effect transistor, a feedback circuit, and a load circuit. The first field effect transistor receives an input voltage signal through an input node, amplifies the input voltage signal, and outputs the amplified input voltage signal through an output node. The feedback circuit is coupled between the input node and the output node, and generates feedback impedance that is changed in response to a control signal. The load circuit is coupled between the output node and a voltage source, and generates load impedance that is changed in response to the control signal to cancel a change of input impedance due to a change of the feedback impedance. Therefore, since the input impedance is not changed when the gain of the amplifier is changed, a voltage standing wave ratio is good, and a range of gain control is broad.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: December 15, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Il-Ku Nam, Young-Jin Kim, Hyun-Won Mun
  • Patent number: 7626470
    Abstract: A voltage-controlled oscillator (VCO) for a multi-band receiver, and a radio-frequency (RF) communication apparatus having the same. The VCO includes at least two fine tune branches, that is, a main fine tune branch and an auxiliary fine tune branch. The main fine tune branch includes at least one variable capacitor whose capacitance varies according to a tuning voltage. The auxiliary fine tune branch includes at least one varactor that operates either as a variable capacitor whose capacitance varies according to the tuning voltage or a fixed capacitor regardless of the tuning voltage, based on an operating frequency band. Accordingly, it is possible to prevent phase noise from increasing by varying the gain of the VCO according to the frequency band of an oscillation signal from the VCO.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: December 1, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jin-Hyuck Yu
  • Patent number: 7623175
    Abstract: Provided are a CMOS image sensor (CIS) type image sensing device for averaging and sub-sampling analog image signals at a variable sub-sampling rate and a method of driving the same. The image sensing device includes: a two-dimensional active pixel sensor (APS) array including pixels arranged in rows and columns; an averaging unit averages reset signals and image signals alternately generated from each of pixels corresponding to odd- numbered and even-numbered rows and columns in based on a predetermined sub-sampling rate in a sub-sampling mode by repeating a method of accumulating, averaging, (and dumping) the reset signals and the image signals, and generating a comparison signal corresponding to a difference between the average of the reset signals and the average of the image signals; and a conventional digital signal output circuit that generates digital signals corresponding to the sub-sampled (averaged) image signals generated from the pixels represented by the comparison signal.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: November 24, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Su-hun Lim
  • Patent number: 7622147
    Abstract: In a liquid crystal display apparatus, a lower substrate has a transmissive electrode formed in a transmissive area of a first substrate and a reflective electrode formed in a reflective area of the first substrate. An upper substrate has a second substrate, a first insulating layer formed on the second substrate corresponding to the transmissive area, a common electrode formed on the first insulating layer and the second substrate corresponding to the reflective area, and a second insulating layer formed on the common electrode corresponding to the reflective area. Accordingly, the liquid crystal display apparatus may have a uniform cell gap, thereby improving a reflectance and a transmittance thereof.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: November 24, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won-Sang Park, Kee-Han Uh, Yong-Kyu Jang, Sang-Woo Park, Sang-Woo Kim, Sung-Eun Cha, Jae-Young Lee, Jae-Hyun Kim
  • Patent number: 7617351
    Abstract: A semiconductor memory having two different memory areas in one chip includes a memory cell array including a first variable memory area controlled to be accessible in at least first and second operation modes, and a second variable memory area controlled to be inaccessible in one of the first and second operation modes; and a memory control unit for storing area information discriminating between the first memory area and the second memory area and generating memory control signals for controlling access to the first memory area and the second memory area. One memory can be substituted for a memory combination including ROMs and RAMs in one chip.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: November 10, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byung-Jun Min, Kang-Woon Lee, Han-Joo Lee, Byung-Gil Jeon
  • Patent number: 7616183
    Abstract: A source driving circuit includes a shift register, a data latch circuit, a D/A converter, and a sample-and-hold circuit. The shift register generates an n-bit first signal in response to a clock signal and an input/output control signal, wherein n is a positive integer. The data latch circuit samples video data using the first signal to latch the sampled video data, and outputs 3×n digital signals. The D/A converter generates a plurality of analog voltage signals corresponding to the 3×n digital signals using a plurality of gray scale voltages. The sample-and-hold circuit generates 6×n sample-and-hold signals using the analog voltage signals in response to a plurality of switching control signals.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: November 10, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chang-Hwe Choi
  • Patent number: 7612819
    Abstract: A complementary metal oxide semiconductor (CMOS) image sensor and a method for operating the same are provided. The CMOS image sensor includes a pixel array unit having a matrix of pixels, wherein each pixel comprises a charge transfer element for transferring charge collected in a photoelectric conversion element to a charge detection element, and a row drive unit for supplying a voltage to the charge transfer element during part of a charge integration period of the photoelectric conversion element, wherein the supplied voltage causes the charge transfer element to have a negative potential.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: November 3, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jung-Hyun Nam
  • Patent number: 7608880
    Abstract: A semiconductor memory device comprises a cell region including a plurality of unit memory cells, and a peripheral circuit region, the peripheral circuit region including a plurality of peripheral circuit devices for operating the plurality of memory cells and at least one operating capacitor formed adjacent to at least one peripheral circuit device at a pseudo circuit pattern region.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: October 27, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Bo-Tak Lim, Su-Yeon Kim, Jong-Pil Son, Gong-Heum Han
  • Patent number: 7609191
    Abstract: A digital/analog converting driver and a digital/analog converting method, in which the digital/analog converting driver converts digital data having M+N (M and N are integers) bits into an analog voltage and includes a first converting unit, a second converting unit, and an analog voltage outputting unit. The first converting unit converts successive M bits of the digital data into a first voltage. The second converting unit converts successive N bits of the digital data into a second voltage. The analog voltage outputting unit adds the first voltage and the second voltage and outputs the added voltage as the analog voltage. The output range of the first voltage is different from that of the second voltage.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: October 27, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Il-Kwon Chang, Yong-Weon Jeon, Ji-Woon Jung
  • Patent number: 7609342
    Abstract: In an LCD for enhancing a reflection ratio, a second substrate faces the first substrate on which a pixel array is formed, a liquid crystal layer is interposed between the first and second substrates, an insulating layer on the first substrate includes first regions and second regions, where each of the second regions has a height difference relative to each of first regions, a base line of a first region forms an angle from about 5 to about 15 degrees with respect to a tangent line of a second region, an embossing pattern with a uniform and low stepped portion is formed by regulating an exposure amount applied to the organic insulating layer so that a reflection ratio is maximized and a distribution of the slopes of an embossing pattern is uniform, and the reflection ratio is enhanced in a specific direction by forming the embossing pattern with an asymmetric profile.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: October 27, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-Ho Yang, Joo-Sun Yoon
  • Patent number: 7606099
    Abstract: A semiconductor memory device controlling an output voltage level of a high voltage generator in response to a variation of temperature has a high voltage generator that provides a high voltage higher than a power source voltage through an output terminal, generates a temperature detection signal obtained by sensing a variation of a diode current based on a temperature variation, and adjusts a voltage level of the output terminal in response to the temperature detection signal. The device is able to automatically control an output voltage or current of the high voltage generator.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: October 20, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hwi-Taek Chung
  • Patent number: 7604494
    Abstract: A lamp socket that supports a lamp including a lamp body and one or more electrodes protruding from opposite end portions of the lamp body and that electrically connects an inverter circuit board driving the lamp and the lamp includes: a socket terminal having a first stopper where the electrodes are inserted in a first direction crossing a lengthwise direction of the electrodes to be held, the socket terminal providing an elastic force in a second direction substantially crossing the lengthwise direction of the electrodes and the first direction, whereby the first stopper is closely held to the electrodes.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: October 20, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-woan Cho, Sung-yong Kang
  • Patent number: 7605884
    Abstract: A TFT array panel on which both pixel electrodes and common electrodes are formed and a color filter panel is disposed opposing the array panel, and liquid crystals are interposed therebetween. The liquid crystals are aligned parallel to the two panels and driven by parallel electric field formed between the pixel electrodes and reference electrodes. Polarization films are arranged outsides the two panels, and a quasi-A plate compensation film is arranged between the color filter panel and the polarization film.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: October 20, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hak-Sun Chang, Eun-Hee Han, Chang-Hun Lee, Seon-Hong Ahn
  • Patent number: 7598481
    Abstract: A complementary metal-oxide semiconductor (CMOS) image sensor and a method of driving the CMOS image sensor that can reduce the number of devices required by each of a plurality of pixels and can stably drive the pixels, in which each of the pixels includes a photodiode that converts light energy into an electrical signal, a transfer transistor that transmits photocarriers stored in the photodiode to a floating diffusing region, a drive transistor that has a gate connected to the floating diffusion region and drives a voltage signal according to a voltage of the floating diffusion region, the voltage signal being output to an external device, and a capacitive device that is connected between a control voltage source and the floating diffusion region and, when a sensing operation of a corresponding pixel is terminated, deselects the pixel by altering the voltage of the floating diffusion region according to a control voltage provided by the control voltage source.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: October 6, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-In Hwang, Yong-Jei Lee, Jung-Chak Ahn, Ju-Hyun Ko
  • Patent number: 7598787
    Abstract: A signal generation apparatus, a frequency converting apparatus and a receiver, in which the signal generation apparatus includes an oscillator, a duty cycle adjusting circuit, and a signal generation circuit. The oscillator generates differential signals. The duty cycle adjusting circuit adjusts duty cycles of differential output signals, in response to at least one of a plurality of control signals, to adjust phases of the differential output signals generated according to a result of amplifying a difference between the differential signals input through a pair of input terminals so as to output duty cycle adjusted differential output signals to a pair of output terminals. The signal generation circuit outputs an in-phase signal and a quadrature-phase signal in response to the duty cycle adjusted differential output signals.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: October 6, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hyun-Seok Kim