Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 7209296 | Zoom lens, and electronic imaging system incorporating the same The invention relates to a zoom lens wherein the total of lens components is reduced as much as possible and image-formation capability is enhanced far more stably over the entire zoom range, so that a lot more thickness reductions are achievable upon received at a ... | 04/24/2007 |
| 7206129 | Real image type zoom finder, and imaging system incorporating the same A real image type zoom finder that, albeit being reduced in size and thickness, can gain high enough zoom ratios and an imaging system equipped with such a real image type zoom finder. The real image type zoom finder comprises an objective optical system, an image-e... | 04/17/2007 |
| 7154562 | Methods and circuits for implementing programmable gamma correction A method of gamma correction includes selecting lower and upper reference curves corresponding to selected reference gamma values. A gamma correction curve is generated from a corresponding gamma correction value and cross-correlated with the upper and lower referen... | 12/26/2006 |
| 7102696 | Method of effecting various anti compensation processes on segmented gray level of input image on plasma display panel A process of effecting various anti compensation processes on input image on a plasma display panel comprises the steps of a) performing a gamma (i.e., γ equal to 0.45) compensation process on a video signal received by the PDP with respect to a γ; b) dividing the... | 09/05/2006 |
| 7064773 | Display apparatus A display apparatus is constructed to make a plurality of light beams of mutually different colors incident to a display element and modulate the beams of the respective colors by the display element to form images of the respective colors. Purity of a predetermined... | 06/20/2006 |
| 7050241 | Image-taking lens apparatus A zoom lens system for forming an optical image of a subject on the light-receiving surface of an image sensor that converts the optical image into an electrical signal is provided with, from the object side thereof, at least a first lens unit, a second lens unit, a... | 05/23/2006 |
| 7046255 | Hardware-based accelerated color correction filtering system A hardware-implemented color video data correction filtering system includes a plurality of linearization tables to gamma decompensate input color video data referenced to a non-linear color space, a plurality of a set of pre-calculated gamut shifting arrays to comp... | 05/16/2006 |
| 7006065 | Gamma compensation method and circuit for color liquid crystal display A driving method for a color liquid crystal display which drives the color liquid crystal display based on a video red signal, a video green signal and a video blue signal by independently applying a gamma compensation to a clamped video red signal, a clamped video ... | 02/28/2006 |
| 6833876 | Using a reduced memory look up table for gamma correction through interpolation A method of CRT gamma correction of n-bit color and corresponding device are presented which employ a reduced size lookup table. An n-bit input signal is separated into its m most significant bits and (n−m) least significant bits. Instead of using its full n-bit v... | 12/21/2004 |
| 6535255 | Illumination intensity correcting circuit An illumination intensity correcting circuit including a curve fitting circuit formed by differential amplifier circuits and a load resistor, wherein the amplification factor of the curve fitting circuit is changed before and after each breakpoint voltage... | 03/18/2003 |
| 6501450 | System for contrast control using linearized variable network of parallel resistive terms A system for controlling contrast of a liquid crystal display is provided by means of a parallel network of resistors. A processor controls general operations of the system and is configured to determine a desired contrast setting of the LCD. The processo... | 12/31/2002 |
| 6295098 | Illumination intensity correcting circuit An illumination intensity correcting circuit including a curve fitting circuit formed by differential amplifier circuits and a load resistor, wherein the amplification factor of the curve fitting circuit is changed before and after each breakpoint voltage... | 09/25/2001 |
| 6271891 | Video signal processing circuit providing optimum signal level for inverse gamma correction A video signal processing circuit in which nearly 100% of a largest possible dynamic range can be used, desired contrast is obtained, and desired brightness characteristics are obtained by an increasing in luminance of a screen. The circuit has an RGB amp... | 08/07/2001 |
| 6215529 | Gamma compensation apparatus Aiming to improve color reproducibility of a red part having high color saturation, a gamma compensation apparatus of the present invention is composed of a bending point setting block 100a and a gamma compensation block 101a and bending point setting blo... | 04/10/2001 |
| 6166781 | Non-linear characteristic correction apparatus and method therefor A non-linear response correction apparatus and method reduce look up table size and output error. In one embodiment, a range of an N-bit input signal is split into two or more sectors, based on a gradient of a non-linear correction curve and an allowable ... | 12/26/2000 |
| 6160532 | Digital gamma correction circuit, gamma correction method, and a liquid crystal display apparatus and electronic device using said digital gamma correction circuit and gamma correction method Image data to which gamma correction for a CRT has been applied is digitally gamma corrected to image data based on an applied voltage-transmittance characteristic of a liquid crystal display unit. A digital gamma correction circuit for correcting digital imag... | 12/12/2000 |
| 6073158 | System and method for processing multiple received signal sources A system and method for time slicing multiple received data streams utilizing multiple processors in such a manner as to ensure that all processors are running at full capability and are efficiently timesharing a global memory storage area. The received d... | 06/06/2000 |
| 5889565 | Method and apparatus for improving the color rendition of color television receivers A method and apparatus for improving the color rendition of a color television receiver includes variable gamma circuits for exponentially correcting the individual color signals. A user control is added to allow user control over the overall gamma of the... | 03/30/1999 |
| 5610666 | Gamma correcting circuit A gamma correcting circuit has a plurality of differential amplifiers having respective input terminals for being supplied with a video signal and respective output terminals connected in common. At least one of the differential amplifiers comprises diffe... | 03/11/1997 |
| 5398076 | Gamma correcting processing of video signals The present invention relates to a method of processing video signals comprised of gamma correcting pixel data of a first signal, gamma correcting pixel data of a second signal, adding the gamma corrected first and second signals to form a sum signal, div... | 03/14/1995 |
| 5394195 | Method and apparatus for performing dynamic gamma contrast control Ordinarily, television signals are subjected to gamma correction at the source to compensate for non-linearities in CRT-based displays in accordance with set standards. However, it has been found in practice that all CRT-based displays do not exhibit the ... | 02/28/1995 |
| 5349389 | Video attenuator with output combined with signal from non-linear shunt branch to provide gamma correction and high frequency detail enhancement A video input signal is applied to a bridged-T attenuator which includes a non-linear element in the shunt branch thereof that provides increasing attenuation as the input signal increases to thereby produce a gamma corrected video output signal at the at... | 09/20/1994 |
| 5175621 | Gamma correction circuit and method thereof Non-linear outputs xA and xB for input signals x are calculated by referring to look-up tables, in which pairs of input and output signals with respect to gamma coefficients A and B different from each other are stored. These outputs... | 12/29/1992 |
| 5003394 | Dynamic video system including automatic contrast and "white-stretch" processing sections A television system is disclosed including sections for limiting peak white drive to a display device (e.g., of the direct view of projection type) while maintaining relatively high subjective image contrast and brightness. Specifically, the system includ... | 03/26/1991 |
| 4575758 | Method of displaying on a viewing screen the output signals from a detector sensitive to radiation In displaying on a viewing screen an image generated by output signals from a radiation-sensitive detector, e.g., an infrared detector, it may occur that weakly contrasting details in the image are lost when the light intensity of the image covers too gre... | 03/11/1986 |
| 4568978 | Method of a circuit arrangement for producing a gamma corrected video signal A gamma correction factor is applied to a video signal without need of the normally used multiplier by forming the logarithm of the logarithm of the video signal and algebraically adding this signal to a second signal representing the logarithm of the cor... | 02/04/1986 |
| 4558363 | Gamma correction circuit A gamma correction circuit to adjust the output of a video signal to the particular picture tube used including an exponential impedance changing element for gamma-correcting a non-gamma corrected input signal to produce a gamma-corrected signal. A curren... | 12/10/1985 |
| 4503464 | Gamma correction circuit for television A gamma correction circuit for television, incorporating a gamma corrector (9) having an output (10) with a gamma-corrected signal (S2), a first superposition stage (16) for supplying, relative to the linear input signal (S1) a difference signal (S3) whic... | 03/05/1985 |
| 4489349 | Video brightness control circuit A control circuit for controlling the relative brightness of a video signal includes an average picture level (APL) detector to measure the average brightness of the video signal and a brightness control circuit responsive to the detected average brightne... | 12/18/1984 |
| 4480268 | Gamma correction circuit A gamma correction circuit is provided with a first circuit including a first linear element and a first non-linear element connected in series in the above order and a second circuit including a second non-linear element and a second linear element conne... | 10/30/1984 |
| 4295161 | Keyed noise filter in a television receiver A video signal channel in a television receiver includes a keyed filter, followed by a keyed automatic brightness control circuit for establishing a desired black or blanking level for the video signal. The brightness control circuit operates during blank... | 10/13/1981 |
| 4249208 | Gamma correction circuit for a video signal and television camera suitable therefor A gamma correction circuit for a video signal which is simple to be integrated in a semiconductor body and which has a minimum of adjusting points in a simple adjusting procedure. The signal whose gamma is to be corrected is applied to a linear and to a n... | 02/03/1981 |
| 4241362 | Circuit for increasing a signal slope of a periodically occurring signal mainly near a reference level A circuit for increasing, mainly near a reference level, a signal slope of a periodically occurring signal, particularly at the black level of a television picture signal. To this end the gamma-corrected and limited luminance signal is applied in a color ... | 12/23/1980 |
| 4227216 | Gamma correction circuit for television A television gamma correction circuit in which a gamma corrector supplies an output signal having a minimum gamma equal to two, from which, relative to a linear input signal which is limited via a signal limiter circuit to the peak-white value, a correcti... | 10/07/1980 |
| 4203131 | Predictable automatic brightness control circuit in a video signal image reproducing system Brightness control apparatus for a video signal image reproducing system including a video signal processing channel, a kinescope driver for supplying video signals to an image reproducing kinescope, and a source of substantially fixed potential to which ... | 05/13/1980 |
| 4057828 | Contrast compression circuits An amplitude compression circuit for de-emphasizing variations in amplitude of a wide band electrical signal. A gamma circuit is used to compress amplitude variations in the wide band signal. A linear signal is subtracted from the compressed signal, produ... | 11/08/1977 |
