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| Number | Title | Issue Date |
| 7349033 | Systems and methods for correcting color phase error in video systems Systems and methods are provided for correcting color phase error in a video decoder system. A demodulator system demodulates the composite input signal and the at least one delayed signal to produce sets of baseband chroma components based on a phase correction val... | 03/25/2008 |
| 7327876 | Image processing device An image processing device includes: a color coordinate conversion device which converts color coordinates of a color signal which has been obtained by color separation; and a two dimensional look up table which is used for correcting a chromaticity signal which has... | 02/05/2008 |
| 7295237 | Image capturing apparatus capable of extracting a moving object An image capturing apparatus comprises a solid image pickup element having pixels for outputting signals, which are logarithmically varied with respect to an incident light intensity, and a voltage controller. Each of the pixels includes an photoelectric conversion ... | 11/13/2007 |
| 7250985 | Color demodulation circuit A color demodulation circuit that can complement an unstable state of an output from an ACC circuit and can obtain stable color-difference outputs, regardless of a burst signal in a chrominance carrier signal. Normally, a selector connects an output from a first mul... | 07/31/2007 |
| 7209188 | Intermediate-frequency circuit having flat group delay characteristic An intermediate-frequency circuit includes a mixer for converting a received TV signal to an intermediate-frequency signal; an intermediate-frequency amplifier for amplifying the intermediate-frequency signal; an intermediate-frequency tuning circuit for tuning to t... | 04/24/2007 |
| 7190399 | Image pickup apparatus An image pickup apparatus comprising: a plurality of pixels each with a photodiode, a logarithmic converter including a logarithmic-converting MOS transistor for converting an output of the photodiode into an electric signal proportional to a logarithmic value of an... | 03/13/2007 |
| 7170479 | Display device and driving method thereof This invention provides a display device in which it is possible to have a light emitting element emitted light with constant luminance without coming under the influence of deterioration over time, and it is possible to realize accurate gray scale express, and yet,... | 01/30/2007 |
| 7138993 | LCD with integrated switches for DC restore An AC-coupled display driver circuit includes one or more DC-restore switches that are integrated within a liquid crystal display. A liquid crystal display system includes a coupling capacitor coupled at one end to a system input video signal, the coupling capacitor... | 11/21/2006 |
| 7098945 | Electronic camera apparatus An electronic camera apparatus reads out, from an image sensing device, an image signal which represents a color image constructed by a number of pixels to which predetermined colors are assigned and has pieces of luminance information with analog values representin... | 08/29/2006 |
| 7088313 | Method and apparatus for compensating white balance of plasma display panel A white balance compensating method of a plasma display panel includes detecting an average brightness of an input data; determining a discharge frequency in accordance with the average brightness of the data; and applying gamma correction to the data in considerati... | 08/08/2006 |
| 7075589 | Color killer adjustment device A conventional method to determine an onset point of a color killer function by design of the external circuit requires physical work to change external parts and their component values varying from one model to another. Therefore, an alternative method to adjust th... | 07/11/2006 |
| 7042520 | Method for color saturation adjustment with saturation limitation A method for adjusting and limiting a color saturation level S of a color pixel of an input image includes steps of: obtaining a first chrominance value U and a second chrominance value V representing the color pixel of the input image; determining the color saturat... | 05/09/2006 |
| 7012643 | One chip, low light level color camera A high sensitivity, single chip, low light level imaging device is provided. The imaging device of the present invention utilizes sparse color sampling, to maximize the luminance information gathered. In particular, color information is gathered by a small proportio... | 03/14/2006 |
| 6958724 | Method and circuit for conforming an analog actual signal to a digital desired signal A method of controlling an analog actual signal to conform to a digital desired signal uses a comparator with two input ports and one output port and a digital-to-analog converter. The analog actual signal to be converted is fed to one input port of the comparator a... | 10/25/2005 |
| 6952239 | Sine generation circuit, phase shift circuit and tint adjustment circuit A phase shift circuit includes a first sine generation circuit generating a sine-converted output signal (sin θ) of the phase shift input signal (θ) and a reversed sine-converted output signal (−sin θ) of the phase shift input signal (θ), a cosine generation c... | 10/04/2005 |
| 6947060 | Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance... | 09/20/2005 |
| 6947099 | Automatic chroma control circuit with controlled saturation reduction An ACC system includes a controllable amplifier having an input coupled to receive a chroma input signal and an output for providing an chroma output signal of controllable amplitude. A first feedback path, including a cascade connection of means for providing a sig... | 09/20/2005 |
| 6927645 | Electronic component structured to compensate for cable losses and method of production An electronic component and a method of its structuring wherein the component is intended to compensate for “cable loss” attributable to the decay of certain signal characteristics including both frequency and amplitude decay over long distances of coaxial cable... | 08/09/2005 |
| 6888579 | Method and system for tint control for component video signals A method and system are provided for controlling tint of component video signals. The system includes a first input for receiving a first component video signal; a second input for receiving a second component video signal; circuitry including a first differential a... | 05/03/2005 |
| 6771311 | Automatic color saturation enhancement A method of processing a digital color image comprising the steps of: providing a digital color image having pixels and a plurality of color channels; processing the image to provide a channel independent restored digital image; determining at least one predictor de... | 08/03/2004 |
| 6618502 | Color image processing method and apparatus In a first signal suppressing process, in cases where a signal level of a certain color signal among color signals obtained from an image sensing operation is higher than a predetermined signal level, the certain color signal is suppressed. An image sensi... | 09/09/2003 |
| 6064442 | Color video signal demodulating apparatus A color video signal demodulating apparatus is provided. The apparatus includes a color subcarrier signal generator for generating a color subcarrier signal synchronously with a color burst, an abnormal burst detector for detecting an abnormal color burst... | 05/16/2000 |
| 5949962 | Method for calculating color correction conditions, a method for determining an exposure amount for printing, an image processing apparatus, a printing exposure apparatus and a storage medium In a method of obtaining a color correcting condition for a color image on an image frame, plural color component image signals are obtained for each pixel of the color image of the frame, and the frame is divided into plural blocks each of which is compo... | 09/07/1999 |
| 5838396 | Projection type image display apparatus with circuit for correcting luminance nonuniformity In a projection type image display apparatus, the screen is divided and a memory to record luminance correction data corresponding to the divided regions is provided, and addresses of the divided regions of the screen are set by an address counter, synchr... | 11/17/1998 |
| 5627599 | Chrominance signal processing apparatus for digital television receiver A chrominance signal processing apparatus for a digital television receiver, comprising an A/D converter for converting a transmitted analog composite video signal into a digital signal in response to a clock frequency, a luminance/chrominance separation ... | 05/06/1997 |
| 5621479 | Method of driving a liquid crystal display device A method of driving a liquid crystal display device for converting a composite video signal into RGB analog video signals by a chrominance circuit, and controlling the transmittance of each pixel corresponding to each color or red, green and blue on a liq... | 04/15/1997 |
| 5526058 | Video signal adjusting apparatus, display using the apparatus, and method of adjusting the display A color corrector receiving a video signal as an input signal and producing an output signal representing a function of power of the input signal includes a logarithmic converter for achieving a logarithmic conversion of the input signal and outputting a ... | 06/11/1996 |
| 5488434 | Picture adjusting method of a color television and its circuit The present invention relates to a picture adjusting method of a color television and its circuit for obtaining enhanced picture resolution by automatically adjusting the contrast, a brightness and sharpness of a picture in accordance with the ambient bri... | 01/30/1996 |
| 5392074 | Level detection circuit and ACC circuit employing the level detection circuit A level detection circuit includes a multiplier and an adder for computing the sums of square values of a burst signal. A maximum value holding circuit holds a maximum value of the sums of the squared values of the burst signal. A counter counts sampling ... | 02/21/1995 |
| 5386296 | Chroma burst detection system A video cassette recording (VCR) playback system includes circuitry for separating the components of a video signal to produce luminance information and color-under information. The separated color-under information is applied to the input of a variable g... | 01/31/1995 |
| 5384601 | Color adjustment apparatus for automatically changing colors An automatic color adjustment apparatus for use in an imaging device for adjusting the color of a subject such as skin or leave, which is well retained in human memory, to be as natural as possible. The color adjustment apparatus has a weighting coefficie... | 01/24/1995 |
| 5347319 | Circuit for regulating the color subcarrier amplitude in a video recorder A circuit for regulating the color subcarrier amplitude in a video recorder used with a television receiver which employs overscanning of the electron beams for different modes of operation includes a regulating circuit for providing a regulating voltage ... | 09/13/1994 |
| 5327228 | System for improving the quality of television pictures using rule based dynamic control A system and method for automatically improving the picture quality of television or other video based images, based upon picture content, using improved rule based picture analysis and compensation techniques. The distribution of facial and non-facial to... | 07/05/1994 |
| 5255080 | Contrast corrector for video signal For a video apparatus such as a television receiver, a gray level correcting device is provided to correct luminance and color saturation of a video signal, thereby making the reproduced image clear and vivid. In this device, at least one of the differenc... | 10/19/1993 |
| 5196923 | Automatic image signal correcting device A video signal correction device is arranged to form a correction signal corresponding to an input video signal, to add the correction signal to the input video signal for correcting the video signal, and, in adding the correction signal to the video sign... | 03/23/1993 |
| 5194964 | Apparatus for processing color or black and white video signals A video-signal output apparatus according to the present invention is an apparatus for outputting a black-and-white video signal. The video-signal output apparatus is arranged to generate a black-and-white video signal, add a burst signal to the black-and... | 03/16/1993 |
| 5191421 | Automatic screen condition control circuit in television set An automatic screen condition control circuit in a television receiver for automatically maintaining a desirable display image on a television screen having proper levels of contrast, sharpness, brightness and color. The automatic screen condition control... | 03/02/1993 |
| 5185657 | Color signal processing circuit with residual phase error correction A color signal processing circuit which includes a conversion unit for converting two color difference signals, which are equivalent to color difference signals obtained by color demodulation of a color signal by using two color difference axes intersecti... | 02/09/1993 |
| 4785346 | Automatic color saturation controller An automatic color saturation controller (ACC) of synchronous detector type provides a high killer sensitivity at low field strength but a low chrominance signal stability at high field strength because the chrominance signal gain is controlled without be... | 11/15/1988 |
| 4733227 | Color display with automatic color control device A detector for detecting the radiation state of a display surface is disposed in a cathode ray tube in order to improve the color reproducibility of a color display. Revise order signals as standard signals are applied to obtain a difference signal betwee... | 03/22/1988 |
