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Class 348/687 - Brightness control


Subclass of Class 348 - Television
Definition: Subject matter including circuitry for changing the DC bias
No. of patents: 290
Last issue date: 05/08/2012


1                
NumberTitleIssue Date
8174624Image processing apparatus and image processing method
An apparatus outputs an image signal for each frame, divides a frame into sub-frames, acquires a first signal of high frequency components and a second signal of low frequency components of a sub-frame, and generates a third signal by multiplying the second signal b...
05/08/2012
8134647Image processing method and apparatus
The invention provides an image processing method and apparatus thereof. The white component data is extracted from the input R, G, B color data which are the base components of the input image data. A maximum value is extracted from the R, G, B color data and a par...
03/13/2012
8130325Luminance level control device
A scene change detecting circuit (1) detects a scene change of video. An average luminance level operating circuit (2) calculates an average luminance level (APL) of a video signal (VD). A luminance overdrive amount calculating circuit (3) calcu...
03/06/2012
8125570Video processing apparatus and video processing method
Disclosed is a video processing apparatus including: a brightness adjusting part which adjusts the brightness of a whole portion of a received video signal according to a brightness adjusting value; and a brightness stretching part which calculates gradient values t...
02/28/2012
8004612Apparatus and method for controlling display brightness in an image display device
An inputted picture signal is stored in an image memory into which a picture signal for at least one frame period can be written, while rewriting the memory. At a plurality of timings within one frame period, an average brightness calculation unit calculates an aver...
08/23/2011
7982807Method for processing a backlight image and device thereof
A method for processing an image includes inputting an image, generating a first mean luminance value and a second mean luminance value according to a plurality of pixels within a first luminance interval and a second luminance interval of the image, generating a fi...
07/19/2011
7965342Video image display device and video image display method
A video image display device is provided. The device includes an expansion factor deriving unit deriving and outputting an expansion factor for each frame of the video image data, for use in a luminance range expansion process for expanding a luminance range of the ...
06/21/2011
7948563Apparatus and method for automatically adjusting luminance
Provided are an apparatus and method for automatically adjusting luminance, and more particularly, apparatus and method for automatically adjusting luminance per region in plurality of luminance regions of an image to be displayed according to its average luminance ...
05/24/2011
7852413Image display apparatus and control method thereof
An image display apparatus that receives an input of a video signal and displays an image based on the video signal, includes: a copyguard detecting unit that detects whether or not the video signal is copyguarded; and a brightness adjusting unit that adjusts the br...
12/14/2010
7839457Display image correcting device, image display device, and display image correcting method
A display image correcting device including, retaining section configured to retain reference correction amount data for correcting nonuniformity as a predetermined factor of an image displayed on a basis of a video signal, the reference correction amount data repre...
11/23/2010
7719619Image processing apparatus
An image processing apparatus is provided that performs more appropriate black stretch processing to display a high quality video. The image processing apparatus includes a luminance characteristics detection unit that analyzes a received video signal to detect a fr...
05/18/2010
7667777Enhanced image display
A display device comprises a data input unit configured to convert an image signal to a color signal. The display device also comprises a brightness control unit operationally coupled to the data input unit, configured to extract a brightness level associated with t...
02/23/2010
7643095Image display device, image display method, and television receiver
An image display device controls a screen luminance to an appropriate value in response to switching of a display mode, thereby displaying each of television broadcast program images and graphic user interface images (including an electronic program guide, and a var...
01/05/2010
7633558Display device capable of compensating for luminance of environments
A display device capable of compensating for luminance of an environment is disclosed. The display device includes: a sensor, for sensing the luminance of the environment to generate a sensing signal corresponding to the luminance; a scaler, coupled to the sensor, f...
12/15/2009
7602447Method and apparatus for adjusting the contrast of an image
A method and apparatus for adjusting the contrast of an input image is disclosed. Brightness level data of the input image is filtered to obtain at least a low frequency component and a high frequency component. The high frequency component is amplified. The input i...
10/13/2009
7535516Data reproduction apparatus reducing power consumption of equipment reproducing video image and method of controlling the same
There is provided a data reproduction apparatus reproducing an image and sound as based on data recorded in a storage medium. In the apparatus if an input device has received predetermined information and data selected to be reproduced is data excluding image data a...
05/19/2009
7505085Apparatus and method for improving recognition performance for dark region of image
An apparatus and method are provided for displaying an image. A process of human color recognition and a process of human color response are analyzed to find a reference brightness value of an image such that a dark region of the image can be correctly detected. A b...
03/17/2009
7483084Image display apparatus and image display method
In an image display apparatus, a video signal is divided for each field into a plurality of sub-fields, each of which is weighted according to the duration of time or number of pulses. The plurality of sub-fields are temporally superimposed for display, so that a gr...
01/27/2009
7439984Image signal processing method, image signal processing apparatus, and image displaying apparatus
An image signal processing method for performing nonlinear compensation on an image signal to be fed into a display device (103). The characteristics of nonlinear compensation are changed according to the brightness of a place in which the display device (...
10/21/2008
7428021Image processing method, recording medium and apparatus for performing color adjustment to image data using a brightness component, a low-frequency brightness component, and first and second parameters
An image processing method aims to optimally improve a brightness distribution with respect to brightness of a face being a main subject of a person image. Thus, the method consists of: a brightness component extraction step of extracting a brightness component from...
09/23/2008
7400363Image processing apparatus and image processing method
An image processing apparatus for performing image processes corresponding to input signals of multiple types, includes a luminance correcting unit that performs correction process on an input signal so as to correct for display luminance, a luminance decreasing uni...
07/15/2008
7391475Display image generation with differential illumination
A method of producing a display image comprises receiving image information representing an image to be displayed, producing an image formed of a plurality of images of different colors, and projecting the produced image along an optical path. The differently colore...
06/24/2008
7373074Video recording apparatus
A video recording apparatus includes a tuner for receiving television broadcast waves, an intermediate frequency circuit for demodulating intermediate frequency (IF) signals outputted from the tuner into video signals, a video recorder for recording the video signal...
05/13/2008
7364304Projector control
To automatically adjust the quality of a projection image commensurate with the performance in-time deterioration and aging of projector component parts in an image projection system, each projector detects an integrated service time of its own light-source lamp and...
04/29/2008
7355654Character display control circuit
A character display control circuit comprises a selection circuit to select and output, as one of the RGB signals, one of a first voltage, a second voltage lower than the first voltage, and one or more third voltages existing between the first and second voltages; a...
04/08/2008
7352410Method and system for automatic brightness and contrast adjustment of a video source
An image brightness and contrast management module for automatically adjusting brightness and contrast of an input video signal includes a histogram generation unit that generates a pixel luminance histogram based on pixel luminance values in a frame, whereby the hi...
04/01/2008
7352352Liquid crystal display device and controlling method thereof
The liquid crystal display device includes a histogram analyzer analyzing a histogram of an input image and determining the input image as being in one of a low brightness mode, a normal mode, and a high brightness mode based on the histogram analysis, a back light ...
04/01/2008
7345713Video display apparatus for correcting luminance difference between display pixels
An analog-to-digital converter converts a video signal into a digital video signal consisting of N bits and outputs the converted signal. A correction value memory stores correction data consisting of M bits which is used to correct the difference in luminance betwe...
03/18/2008
7327333Method and apparatus for reducing flicker when displaying pictures on a plasma display panel
A method and apparatus for reducing flicker when displaying pictures on a plasma display panel, based on an input phase alternation line (PAL) video signal of 50 Hz. Video signal data include successive first and second sub-field groups. When the number of sub-field...
02/05/2008
7327384Gamut false color display
A gamut error false color display uses false coloring on a monochrome image of a video picture being tested. Composite and component gamut error signals are extracted from an input video signal representing the video picture being tested. Such error signals may repr...
02/05/2008
7324165[Automatic contrast limiting circuit and method thereof with spatial domain infinite impulse response filter]
An automatic contrast limiting circuit and method thereof with spatial domain infinite impulse response filter are disclosed. A spatial domain infinite impulse response filter is adapted to generate an output value of the spatial domain infinite impulse response fil...
01/29/2008
7324118Super imposed image display color selection system and method
An optimal pen color is automatically selected for a given background color based upon a predetermined relative distance in the Munsell color-order system. The predetermined distance is defined in terms of saturation, hue and or lightness. In general, sufficient vis...
01/29/2008
7312834Image processor, semiconductor integrated circuit, and method for processing an image
An image processor includes a luminance signal processor configured to execute an amplification by utilizing a gain set by a plurality of gain step-sizes including a first gain step-size and a second gain step-size less than the first gain step-size, to an image sig...
12/25/2007
7310449Image processing system, projector, computer-readable medium and image processing method
An image processing system enabling luminance regulation depending on displayed images is provided by a projector, the projector including: a signal input section which input an image signal; a signal output section which outputs a corrected image signal; an image p...
12/18/2007
7310113Camera for automatically adjusting image brightness for an image on a display
Image signals outputted from a CCD to an image signal processing circuit, which performs A/D conversion, YC signal processing to convert the image signals into video signals of NTSC or the like and outputs video signals after D/A conversion. A microcomputer receives...
12/18/2007
7277135Video display signal brightness control circuit
Video signal control circuitry for use in a video display system in which a variation in a brightness level of a video display signal causes a corresponding variation in a beam current signal, wherein such video signal control circuitry maintains a controllable vide...
10/02/2007
7268753Apparatus and method of controlling brightness of image
Provided are an image brightness controlling apparatus and method, and an adaptive brightness controlling apparatus and method based on the brightness degree and/or brightness range of an image. The image brightness controlling apparatus includes a brightness increm...
09/11/2007
7265795Video signal processing circuit, video display apparatus, and video display method
Embodiments of the invention provide a video display technique with which a stable video with a high contrast can be obtained according to brightness of a screen. In one embodiment, a video signal processing system for a video display apparatus which performs displa...
09/04/2007
7259769Dynamic backlight and image adjustment using gamma correction
Methods and apparatuses for the application of image intensity and luminance adjustment and gamma adjustment for the purpose of compensating perceived image brightness, and thus enhancing the range of display backlight brightness adjustment that may be applied to co...
08/21/2007
7245764Image processing method and image processing apparatus utilizing luminance histograms, and projector
The invention provides an image processing method, an image processing apparatus, and a projector which determine a scene-change so as to perform an optimal tone conversion, luminance correction, or the like, for each scene of a moving image. An image processing app...
07/17/2007
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