Brightness Control Patents (Class 348/687)
  • Patent number: 8174624
    Abstract: 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 by K. If a fourth signal obtained by adding the third signal to the first signal falls within a predetermined range, the apparatus outputs the third signal, whereas if the fourth signal includes a portion exceeding the range, the apparatus outputs a signal obtained by correcting the third signal. The apparatus also generates a composition signal of the output signal and the first signal and a fifth signal by multiplying the third signal by a correction amount y of the third signal. As a sub-frame of interest, either the composition signal or the fifth signal is output.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: May 8, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yukihiko Sakashita
  • Patent number: 8171507
    Abstract: TV settings such as brightness can be established by sending from a TV signals from an ambient light sensor to a network server, with the network server establishing settings such as brightness in response for a program being played on the TV.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: May 1, 2012
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Takashi Hironaka, Max Wu
  • Patent number: 8169544
    Abstract: To eliminate a signal deviation that occurs when scaling processing is performed on image data including multiple signals having different data rates, there is provided an image processing apparatus which performs scaling processing on image data including multiple signals having different data rates and includes a first scaling processing unit that performs a first scaling processing according to a first scale factor in a first area; and a second scaling processing unit that performs a second scaling processing subsequent to the first scaling processing, according to a second scale factor in a second area adjacent to the first area, on a signal having a high data rate using the first scale factor, and performs the second scaling processing on a signal having a low data rate using the second scale factor obtained by correcting the first scale factor, after the first scaling processing.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: May 1, 2012
    Assignee: Renesas Electronics Corporation
    Inventor: Daisuke Kawaguchi
  • Publication number: 20120098960
    Abstract: A video link type illuminating control system and video link type illuminating control method allow a signal containing the idea of the content creator to be added to an airwave signal or a video content signal so that the audio-visual space is illuminated based on the control signal generated from the signal. As a result, illumination can be controlled in linkage with video, thus increasing visual realism.
    Type: Application
    Filed: August 26, 2008
    Publication date: April 26, 2012
    Inventors: Toshihiro Fujino, Yuichi Ishikawa, Natsuki Saito
  • Patent number: 8159609
    Abstract: The invention relates to an image processing chip and related method. The image processing chip includes a pin for receiving a composite signal; a synchronization signal detecting circuit, coupled to the pin, for extracting a synchronization signal from the composite signal; a clamping circuit, coupled to the pin, for adjusting a voltage level of the composite signal according to the synchronization signal; and an analog to digital converter, coupled to the pin, for generating a video signal by sampling the composite signal.
    Type: Grant
    Filed: March 13, 2007
    Date of Patent: April 17, 2012
    Assignee: Realtek Semiconductor Corp.
    Inventors: Jin-Sheng Gong, Jui-Yuan Tsai, Yu-Pin Chou, Yueh-Hsing Huang
  • Publication number: 20120086862
    Abstract: A video display system of the present invention includes (i) a projector that generates a display image in accordance with a digital video signal and (ii) a screen on which an image generated by the projector is projected and displayed. Provided behind the screen is an infrared-emitting unit that emits infrared light through a video display surface during a period of time in which a picture is being displayed on the screen. This allows invisible light to be emitted through a video display section such as a screen together with a displayed image, thereby degrading the image quality of a re-shot picture and rendering use of re-shot image content impossible.
    Type: Application
    Filed: July 1, 2010
    Publication date: April 12, 2012
    Applicants: RESEARCH ORGANIZATION OF INFORMATION AND SYSTEMS, SHARP KABUSHIKI KAISHA
    Inventors: Seiichi Gohshi, Isao Echizen
  • Patent number: 8144164
    Abstract: A display image of a frame is input in time series. An inverse colored image to cancel the display image is generated. The display image is divided into a plurality of subfields, and the inverse colored image is also divided into a plurality of subfields. A time divisional image is generated by disposing a display time of a subfield of the inverse colored image before and after a display time of a corresponding subfield of the display image. While displaying the time divisional image on a screen, a light from the screen is transmitted in synchronization with display timing of the display image in a display time of the time divisional image, and the light is cut off in synchronization with display timing of the inverse colored image in the display time of the time divisional image.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: March 27, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Tomoki Watanabe
  • Patent number: 8134647
    Abstract: 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 parameter is generated based on the white component data and the maximum value. The R, G, B color data are multiplied by the parameter to obtain a multiplication result. Subtract the white component data from the R, G, B color data to obtain a subtraction result. The multiplication result and the subtraction result are added together to generate the output R, G, B color data. The output R, G, B color data and the white component data form an output image data with higher brightness.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: March 13, 2012
    Assignee: Wintek Corporation
    Inventors: Ching-Fu Hsu, Shin-Tai Lo, Ruey-Shing Weng, Jyun-Sian Li
  • Patent number: 8130322
    Abstract: A picture control method and an image processing apparatus thereof are provided. The method includes setting a picture control mode; setting a picture control value in response to the picture control mode; and sensing a change of the picture control value; restoring the picture control value to a previous value if the change of the picture control value is maintained in excess of a certain amount of time. The image processing apparatus includes a picture controller which sets a mode and a value in response to the mode; a memory which stores an initial value of the value; and a controller which senses a change of the value and controls the picture controller to maintain the change of the value for a certain amount of time, and if the change of the value is maintained in excess of the certain amount of time, retrieves the initial value of the value, and controls the picture controller to change the picture control value to a previously unchanged value.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: March 6, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Boo-taeck Lim
  • Patent number: 8130325
    Abstract: 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) calculates a luminance overdrive amount (OD) based on the average luminance level (APL). A time-linked attenuating circuit (7) outputs a power consumption limit correction amount (PA) by attenuating the luminance overdrive amount (OD) with an elapse of time from a point in time of detecting the scene change. An adder (8) adds the power consumption limit correction amount (PA) and a reference power consumption limit value (Lp) to output the addition result as a power consumption limit amount (PL). An ABL circuit (4) calculates a luminance limit amount (BL) based on luminance limit characteristics, the average luminance level (APL) and the power consumption limit amount (PL).
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: March 6, 2012
    Assignee: Panasonic Corporation
    Inventors: Noriyuki Iwakura, Nobuo Taketani, Takeru Yamashita, Shozo Tozaki, Takashi Ootomo, Hiroshi Yoshinari
  • Patent number: 8125500
    Abstract: A picture quality when reducing the brightness or the contrast of the picture on a plasma panel shall be improved. For this purpose there is provided a driving apparatus including brightness/contrast control means for receiving video input data for modifying the video levels of the video input data in accordance with external adjustment data and for outputting modified video data. First power measurement means measure a power level of the modified video data and supply a first power level. Second power measurement means measure a power level of the video input data and supply a second power level. Generator means generate a third power level comprised between the first power level and the second power level or equal to the larger one to data processing means. The data processing means calculate the maximum number of sustain pulses per frame applicable to the modified video data on the basis of the third power level and control the display of the modified video data on the plasma display panel.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: February 28, 2012
    Assignee: Thomson Licensing
    Inventors: Cédric Thebault, Carlos Correa, Sébastien Weitbruch
  • Patent number: 8125570
    Abstract: 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 to stretch a first brightness in a first portion including a smaller brightness value than a first reference value and a second brightness in a second portion including a larger brightness value than a second reference value in the received video signal, and outputs the received video signal having the brightness adjusted by the brightness adjusting part in a third portion including a smaller brightness value than a minimum brightness value and in a fourth portion including a larger brightness value than a maximum brightness value in the received video signal by applying the calculated gradient values to the third portion and the fourth portion, respectively, to display the brightness of the received video signal corresponding to the third portion a
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: February 28, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tae-hwan Cha
  • Patent number: 8111940
    Abstract: Which types of subject among a predetermined plurality of types of subject are contained in an image represented by input image data are detected. Features regarding the detected subject types are calculated in a feature calculating circuit based upon the image data. In accordance with the features calculated, the gain for every subject type is calculated. The gains are weighted and averaged using degrees of importance that have been input for every subject type. The input image data is corrected based upon applicable gains obtained by the weighted averaging.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: February 7, 2012
    Assignee: Fujifilm Corporation
    Inventor: Takahiro Okamoto
  • Patent number: 8107763
    Abstract: An image brightness adjusting method is provided. The brightness values of all pixels of the image are firstly increased in various increasing degrees. Next, the increased brightness values are decreased in various decreasing degrees according to the original brightness values, thereby avoiding over-increasing the brightness values of the image. Moreover, the use of the color saturation values to adjust the brightness values can avoid the unnatural image appearance.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: January 31, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Ying-Jieh Huang, Chiou-Shann Fuh, Hsiang-Ting Chen
  • Patent number: 8102473
    Abstract: An image correction circuit capable of preventing a loss of gray levels in a luminance region at the time of the direct current level conversion of a luminance signal to improve the quality of a displayed image. The image correction circuit detects an average peak level of input image data in each image frame, and corrects the input image data to lower the luminance of input image data in an intermediate luminance region according to the average peak level while reducing the luminance of input image data at a predetermined rate in at least of a low luminance region.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: January 24, 2012
    Assignee: Sony Corporation
    Inventor: Shigeru Harada
  • Patent number: 8098336
    Abstract: In a microdisplay TV with dynamic iris control, interpolation is used to undertake 3D gamma adjustment of the display for intermediate brightness levels.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: January 17, 2012
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventor: Guillermo Castano De La Serna
  • Publication number: 20120002114
    Abstract: In a microdisplay TV with dynamic iris control, interpolation is used to undertake 3D gamma adjustment of the display for intermediate brightness levels.
    Type: Application
    Filed: September 14, 2011
    Publication date: January 5, 2012
    Inventor: Guillermo Castano De La Serna
  • Publication number: 20120002110
    Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system receives a video image, that when displayed, includes a picture portion, a non-picture portion, and a subtitle which is superimposed on at least a subset of the non-picture portion, where the non-picture portion has an initial brightness value. Then, the system scales the brightness of pixels corresponding to a remainder of the non-picture portion of the video image to have a new brightness value that is greater than the initial brightness value to reduce user-perceived changes in the video image associated with backlighting of a display that displays the video image, where the remainder of the non-picture portion excludes the subset of the non-picture portion.
    Type: Application
    Filed: September 12, 2011
    Publication date: January 5, 2012
    Applicant: APPLE INC.
    Inventors: Ulrich T. Barnhoefer, Wei H. Yao, Wei Chen, Barry J. Corlett, Jean-Didier Allegrucci
  • Publication number: 20110317075
    Abstract: A TV or monitor with a sensor sensing radiation or light from the surroundings, where a controlling unit, on the basis of the sensed radiation or parameters of a video signal, frame rate converts an original video signal to an up converted video signal by determining additional images for the video signal, the additional images being determined on the basis of the determined radiation/light or parameter of the video signal in order to relatively reduce frame rate conversion generated artefacts when the radiation or light intensity is higher.
    Type: Application
    Filed: March 15, 2010
    Publication date: December 29, 2011
    Applicant: Bang & Olufsen A/S
    Inventor: Henrik Haastrup
  • Patent number: 8077219
    Abstract: A method of providing intensity correction for a video is disclosed. The method may comprise evaluating a portion of a frame of the video; determining a difference in intensity of a current block of the frame with the corresponding block of the previous frame; correcting all blocks of the frame with local intensity correction if a first set of parameters is met; and correcting the current block of the frame with both global intensity correction and local intensity correction if the first set of parameters is not met. An integrated circuit having a circuit for providing intensity correction for a video is also disclosed.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: December 13, 2011
    Assignee: Xilinx, Inc.
    Inventors: Justin G. Delva, Mohammed Sharaf Ismail Sayed
  • Patent number: 8073249
    Abstract: The present invention relates to an apparatus and a method thereof for adjusting a luminance of an image signal. The apparatus includes a complementary circuit, a statistical circuit, a calculating circuit, and a blending circuit. The complementary circuit receives an image signal to generate a complementary luminance according to the luminance of the image signal. The statistical circuit receives the image signal to generate a statistical signal according to the luminance of the image signal. The calculating circuit receives the image signal, the complementary luminance, and the statistical signal to generate a calculated luminance of the image signal. The blending circuit generates an output image signal according to the calculated luminance and the luminance of the image signal. A video display device can thereby displays optimum pictures according to the output image signal.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: December 6, 2011
    Assignee: Realtek Semiconductor Corp.
    Inventors: Sen-Huang Tang, Wen-Tsai Liao
  • Patent number: 8068686
    Abstract: An image recording apparatus includes an imaging section which images a subject to obtain imaging data. An image quality information acquiring section acquires a plurality of sets of information concerning image quality. An image quality information converting section converts the plurality of sets of information concerning the image quality acquired in the image quality information acquiring section into image processing parameters used in image processing of the imaging data. An image processing section performs image processing with respect to the imaging data based on the image processing parameters converted by the image quality information converting section. A recording section records in a recording medium the imaging data subjected to image processing in the image processing section, or records in the recording medium the imaging data which is not yet subjected to image processing in the image processing section and the plurality of sets of information concerning the image quality.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: November 29, 2011
    Assignee: Olympus Corporation
    Inventor: Tetsuya Toyoda
  • Publication number: 20110285913
    Abstract: A video processor includes a video stream translation module configured to generate a translated luminance value for a pixel of a current frame of a video data stream. The translated luminance value is based on a first luminance value for the pixel and a first translation matrix for the current frame of the video data stream. The video processor includes a filter configured to generate an output luminance value for the pixel based on the translated luminance value and a target translated luminance value for the pixel. The output luminance value may be based on a weighted average of the translated luminance value and the target translated luminance value using a first weighting factor. The video processor may include a first weighting factor generator configured to generate the first weighting factor based on luminance values of the current frame of the video stream.
    Type: Application
    Filed: July 14, 2011
    Publication date: November 24, 2011
    Inventor: Paul M. Astrachan
  • Publication number: 20110279732
    Abstract: An image processing apparatus for controlling brightness of an image to be output to a display unit, includes: a separation unit which separates an image of each frame into a plurality of areas; an entropy calculation unit which calculates, for each area, entropy of information on at least one of distribution of luminosity, character quantity and motion quantity; and a brightness control unit which controls brightness in each area so that a reduction rate of brightness in an area of which entropy is small is greater than a reduction rate of brightness in an area of which entropy is large.
    Type: Application
    Filed: April 29, 2011
    Publication date: November 17, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Toshiyuki Kanda
  • Publication number: 20110261263
    Abstract: Backlit video display systems where the backlights (for example, LED backlights) are controlled based at least in part on the content of the video signal of the video that is being displayed by the backlit video display system. The system can provide specific control of the three primary colors (for example, red, green and blue LEDs). The system can content-based control in a spatial mode. The system a smart backlighting system with content-based controls at the following levels: (i) spectral, (ii) spatial, and (iii) temporal control. Also, some embodiments may provide a novel way of providing a backlit video display system with night vision (NV) capability through a unique four LED chip architecture.
    Type: Application
    Filed: April 21, 2011
    Publication date: October 27, 2011
    Applicant: UNIVERSITY OF CENTRAL FLORIDA
    Inventors: Winston V. Schoenfeld, Huiyang Zhou
  • Publication number: 20110234911
    Abstract: A display device includes a display that includes display elements arranged in lines of a matrix. Each display element is configured to emit light based on a video signal that is received by the display. A proportion determiner is configured to determine, for each line, a proportion of a single frame period during which each display element of a corresponding line is not to emit the light. A signal converter is configured to convert an amplitude of the video signal for each line according to the proportion determined for each line. A signal output is configured to output the video signal converted by the signal converter to the display as a converted video signal. A scanner is configured to output a scanning signal to the display for each line for inputting the converted video signal to the display elements of each line based on the proportion determined for each line.
    Type: Application
    Filed: June 8, 2011
    Publication date: September 29, 2011
    Applicant: PANASONIC CORPORATION
    Inventor: Mika NAKAMURA
  • Publication number: 20110211127
    Abstract: According to one embodiment, a display method includes generating data includes pixels, each pixel of the data having brightness values corresponding to reference colors, selecting a first correction data, which corresponds to a first luminance level dimmer than a second luminance level and comprises correction information items corresponding to the brightness values of the data, and a second correction data which corresponds to the second luminance level and comprises correction information items corresponding to the brightness values, and correcting the brightness values of each pixel of the data based on the selected correction data, wherein a second brightness value obtained by correcting a first brightness value based on the first correction data is higher than a third brightness value obtained by correcting the first brightness value based on the second correction data, and the first brightness value is equal to neither the minimum nor the maximum brightness value.
    Type: Application
    Filed: February 28, 2011
    Publication date: September 1, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Song Kaiwen Kelvin
  • Patent number: 8004612
    Abstract: 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 average brightness from the picture signal written into the image memory, and a brightness control unit performs brightness control of the picture signal read from the image memory based on the calculated average brightness.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: August 23, 2011
    Assignee: Tohoku Pioneer Corporation
    Inventors: Katsuhiro Kanauchu, Shuichi Seki
  • Patent number: 7992086
    Abstract: A system and method enabling comparative and interactive preview of the effects of different operational settings to facilitate adjustment of a media-playing set includes providing a memory to store a test sample for each control item and a demonstrational tool to generate a plurality of preview items for simultaneous presentation on the display while the settings of the control item are being adjusted, such preview items being based on the test sample such that each preview item reflects the effect on the sample caused by selection of a respective setting for the control item. A system and method enabling expanded interactive preview of the effects of operational settings similar to the above except the test sample is provided for grouped pairs of the control items and each preview item reflects the effect caused by selection of different combinations of settings for the control items in this grouped pair.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: August 2, 2011
    Assignee: Sharp Laboratories of America, Inc.
    Inventor: Vishnu Kumar Shivaji-Rao
  • Patent number: 7986852
    Abstract: The invention discloses an image processing apparatus for adjusting the lightness of an input image which has a hue. The image processing apparatus includes a look-up table, a processing unit and an adder. The look-up table records M lightness, N hues and M*N corresponding lightness offset values. The processing unit is used for storing the look-up table and for selecting a corresponding lightness offset value from the look-up table according to the lightness and the hue of the input image. The adder is coupled to the processing unit and used for adding the selected lightness offset value to the lightness of the input image, so as to obtain an adjusted lightness. Accordingly, the image quality is improved.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: July 26, 2011
    Assignee: Quanta Computer Inc.
    Inventors: Yu-Hsiang Huang, Hsin-Hun Lee
  • Patent number: 7982807
    Abstract: 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 first luminance threshold according to the first mean luminance value, setting a compensation parameter, generating a first compensation luminance value according to the first mean luminance value and the compensation parameter, generating a second compensation luminance value according to the first luminance threshold, the first mean luminance value, the second mean luminance value, and the compensation parameter, and adjusting luminance values of pixels within the a smaller compensation luminance value and a greater compensation luminance value according to the smaller compensation value and a comparison between the first compensation luminance value and the second compensation luminance value.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: July 19, 2011
    Assignee: Qisda Corporation
    Inventor: Yu-Cheng Chen
  • Patent number: 7969449
    Abstract: Various techniques for implementing aspects of color control in display devices are disclosed. One exemplary technique includes measuring an input/output profile of a display, then applying a mathematical model to the display's measured profile to generate color control tables. One exemplary technique may include tracking a first color temperature below a high-luminosity transition point and gradually transitioning to tracking a second color temperature above the high-luminosity transition point. One exemplary technique may also include gradually transitioning from tracking a darklight color temperature below a low-luminosity transition point to tracking the first color temperature above the low-luminosity transition point. Another exemplary technique may include tracking a response curve for a specified chromaticity above a low-luminosity transition point.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: June 28, 2011
    Assignee: Tamiras Per Pte. Ltd., LLC
    Inventors: Caba Moldvai, Mathew D. Halfant, Zisheng Le
  • Patent number: 7965342
    Abstract: 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 video image data on the basis of an image characterizing quantity related to the luminance of the video image data corresponding to the frame; a luminance range expansion processing unit performing the luminance range expansion process to the video image data on the basis of the expansion factor output from the expansion factor deriving unit; and a scene-change detecting unit detecting a change in a screen state of a present frame into a black screen state on the basis of the video image data and detecting a scene-change indicating that the scene of the video image has changed.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: June 21, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Tatsuhiko Nobori
  • Patent number: 7952645
    Abstract: A video processing apparatus includes a detector which detects whether pattern portions such as wallpaper portions having a pattern or the like or no-picture area portions having a single color are contained besides contents in a video signal input thereto, and a corrector which corrects the video signal. If the pattern portions are contained in the input video signal, the corrector is controlled so as not to correct the video signal.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: May 31, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kozo Masuda, Ikuya Arai, Masaaki Miyano
  • Patent number: 7948563
    Abstract: 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 value. An average luminance of an image is detected, and then contrast and brightness of image is automatically adjusted according to detected average luminance. Amplification of contrast and brightness is increased to brighten an image in an image with low luminance and reduced to suppress image dazzle in an image with high luminance, thereby providing user with an image of appropriate brightness, irrespective of original brightness. It is possible to prevent diversion of image by dividing its luminance level into a plurality of regions and controlling contrast and luminance per region. Further, a buffer region between luminance regions prevents flickering of image on a screen due to diversion of an adjustable gain.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: May 24, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Koichi Sono
  • Publication number: 20110096233
    Abstract: A control device that controls a video signal to be input to a display device and controls the luminance of a light source that causes light to be incident on the display device includes: a light source luminance control section that controls the luminance of the light source by means of a light source luminance control signal; a storage section that stores relationships between light source luminance control signals and video correction amounts; a video correction signal generating section that generates, on the basis of the video correction amount that is stored in the storage section and corresponds to the generated light source luminance control signal, a video correction signal that is used to correct the video signal; and a video signal correcting section that corrects the video signal by means of the video correction signal.
    Type: Application
    Filed: October 14, 2010
    Publication date: April 28, 2011
    Applicant: Seiko Epson Corporation
    Inventors: Hirosada HORIGUCHI, Hiroshi YOSHIMOTO, Tadashi YAMADA
  • Patent number: 7916153
    Abstract: Embodiments of the present invention generally provide m Methods and apparatus for reducing power consumption of backlit displays are described. Power consumption is reduced by dimming backlighting by a first scale factor and boosting pixel values by a second scale factor to compensate for the dimming. The scale factors may be constant values. Alternately, one or both of the scale factors may be determined based on pixel values for one or more frames to be displayed and/or one or more frames that have been displayed. For example, scale factors may be calculated based on an average linear amplitude of one or more frames of pixel values or from a maximum pixel value of one or more frames of pixel values. A graphical processing system is described including an integrated circuit capable of transforming a pixel value from a gamma-compensated space to a linear space.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: March 29, 2011
    Assignee: NVIDIA Corporation
    Inventors: Stephen D. Lew, Michael A. Ogrinc
  • Patent number: 7916218
    Abstract: An image display apparatus and method are provided. The image display apparatus includes an external light detection module which detects an intensity of external illumination; a storage module which stores a plurality of light emitting unit control values; and a control module which selectively performs, according to a result of a determination, a lightness compensation operation for compensating a lightness of a light emitting unit and a visibility adjustment operation for adjusting the visibility of the original input image. The method includes detecting an intensity of external illumination; determining whether a visibility of an original input image can be ensured according to an input light emitting control value and the detected external illumination intensity; and selectively performing, according to the determination, a lightness compensation operation for compensating a lightness of a light emitting unit and a visibility adjustment operation for adjusting the visibility of the original input image.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: March 29, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won-hee Choe, Chang-yeong Kim, Seong-deok Lee
  • Patent number: 7911541
    Abstract: A liquid crystal display device includes a four-color conversion circuit with no chromatic changes in which the chromaticity and luminance of input image data are maintained, a four-color conversion circuit with chromatic changes in which the chromaticity and luminance of input image data are not necessarily maintained, and a selector for switching between the outputs from the two conversion circuits according to a level detection signal from a level detection circuit that detects whether the level of input image data is equal to 100% white level or higher. Display data from the selector is supplied to a liquid crystal section that displays an image by four-color pixels of red, green, blue, and white. The image data conversion circuit controls the light emission quantity of a backlight (BL) as white color, and converts input image data so that the level of data displayed on the liquid crystal section becomes uniform.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: March 22, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Tsunenori Yamamoto, Katsumi Kondo, Yuka Utsumi
  • Publication number: 20110063518
    Abstract: A projector including: an adjustment image generation section which generates an adjustment image which allows adjustments of brightness and color difference; an input section to which operation information is input; an adjustment information generation section which generates brightness adjustment information indicating an adjustment value of the brightness and color difference adjustment information indicating an adjustment value of the color difference based on the operation information; and an adjustment section which adjusts the brightness and color of an image based on the brightness adjustment information and the color difference adjustment information.
    Type: Application
    Filed: November 19, 2010
    Publication date: March 17, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shiki FURUI
  • Patent number: 7903178
    Abstract: A color management unit is architected to achieve higher-quality appearance used in various video formats and to enable improvements in picture contrast and colorfulness. The color management unit comprises an optional input color space converter to convert the input digital video to a desired color space, an adaptive contrast enhancer to apply contrast improvement algorithms in response to different scenes in either manual or automatic modes, intelligent color remapping for enhancing selected colors, sRGB compliance to produce a video display that is uniform over different monitors, global color and brightness controls to combine global processing and color conversion, gamut compression to maintain pixel validity in color space conversion, and gamma correction to compensate for nonlinear characteristics of an output display.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: March 8, 2011
    Assignee: Marvell International Ltd.
    Inventors: Nikhil Balram, Sujith Srinivasan, Bipasha Ghosh, Sanjay Garg
  • Patent number: 7903173
    Abstract: The synthesizing circuit inputs signals representing the brightness coefficient K2 and the brightness coefficient K3 from the multiplexer, and inputs the overscanned frame image data D1 in pixel units from the first latch circuit. When the start frame image read the third time and the after frame image read the first time are input simultaneously, the synthesizing circuit calculates the brightness coefficient K2 for the brightness value of the pixels of the start frame image, and calculates the brightness coefficient K3 for the brightness value of the pixel of the after frame image. Then, it synthesizes the pixels of the start frame image and the pixels of the after frame image for which the respective brightness coefficients were calculated, and generates the intermediate frame image data D2.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: March 8, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Kesatoshi Takeuchi, Takahiro Sagawa, Hidehito Iisaka, Mitsuhiro Inazumi
  • Publication number: 20110051006
    Abstract: Provided is a video processing circuit which designates an applied voltage, which is to be applied to a liquid crystal element of each pixel, based on a video signal, including: a first boundary detection portion which analyzes a video signal of a current frame and detects a boundary between a pixel, to which an applied voltage near a maximum grayscale is applied, and a pixel, to which an applied voltage near a minimum grayscale is applied, based on the video signal; a second boundary detection portion which analyzes a video signal of a frame preceding the current frame and detects a boundary between the pixel, to which the applied voltage near the maximum grayscale is applied, and the pixel, to which the applied voltage near the minimum grayscale is applied, based on the video signal; and a correction portion which corrects the applied voltage to a voltage which provides an initial tilt angle to a liquid crystal molecule in a case where the applied voltage designated with the video signal of a pixel adjacent
    Type: Application
    Filed: August 30, 2010
    Publication date: March 3, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hidehito IISAKA, Hiroyuki Hosaka
  • Publication number: 20110051007
    Abstract: A video processing circuit for specifying an applied voltage that is applied to a liquid crystal included in each pixel on the basis of a video signal, the video processing circuit includes a correction unit configured to, if the applied voltage specified by the video signal is a voltage of a level lower than a voltage level that is sufficient to an extent that can provide liquid crystal molecules with initial inclination angles, perform correction so that the applied voltage has a voltage level that is sufficient to an extent that can provide the liquid crystal molecules with initial inclination angles.
    Type: Application
    Filed: August 30, 2010
    Publication date: March 3, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hiroyuki HOSAKA, Hidehito Ilsaka
  • Publication number: 20110051008
    Abstract: An image processing apparatus for improving clarity and an image processing method are provided. An image processing apparatus includes an image receiving unit, and an image processing unit which allows luminance of an image to be within a preset range of luminance and adjusts clarity of the image. Accordingly, the problem that the luminance exceeds a digital value may be prevented, and clarity of the image may be effectively improved.
    Type: Application
    Filed: March 26, 2010
    Publication date: March 3, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-deok LEE, Bo-gun PARK, Youn-sook JUNG
  • Publication number: 20110043705
    Abstract: A brightness adjusting device of the present invention includes: a brightness setting section that accepts input of brightness change information that is an instruction to change a brightness setting value; a brightness adjusting section that performs brightness adjustment by either one of a first brightness adjusting unit and a second brightness adjusting unit having different characteristics from each other, in accordance with the instruction that is input from the brightness setting section; a determining section that determines whether or not the brightness adjustment of the brightness adjusting section switches from the first brightness adjusting unit to the second brightness adjusting unit; and an output section that outputs an alarm when the brightness adjustment of the brightness adjusting section is determined to switch from the first brightness adjusting unit to the second brightness adjusting unit based on a determination result of the determining section.
    Type: Application
    Filed: November 19, 2008
    Publication date: February 24, 2011
    Inventor: Katsuyuki Matsui
  • Publication number: 20110037901
    Abstract: A video signal processing apparatus includes: an enhancement gain generating section obtaining an enhancement gain for each pixel based on an luminance signal forming part of an input video signal and a predetermined enhancement gain; and an enhancing section performing a process of enhancing the luminance signal forming part of the input video signal based on the enhancement gain. The enhancement gain generating section includes a mean deviation calculating portion obtaining a mean deviation of luminance values of pixels included in a predetermined region centered at a pixel of interest that is the pixel for which the enhancement gain is to be obtained, a weighting coefficient generating portion generating a weighting coefficient for the pixel of interest according to the value of the mean deviation, and a multiplication portion multiplying the predetermined enhancement gain by the weighting coefficient to obtain the enhancement gain for the pixel of interest.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 17, 2011
    Applicant: SONY CORPORATION
    Inventor: Akihiro UEYAMA
  • Patent number: 7889235
    Abstract: A PC 40 outputs a picture signal for a white color to a TV 100, and generates chromaticity information by measuring luminance values of respective RGB color components from a picture displayed on the TV 100, thereby determining whether the chromaticity information undergoes a change by varying an output of any of the RGB color components by a predetermined amount. Subsequently, when the chromaticity information has not undergone a change, the contrast of the TV 100 is lowered by a predetermined amount, and re-acquisition re-determination of chromaticity information is executed. On the other hand, when the chromaticity information has undergone a change, determination is made on whether the chromaticity information substantially matches chromaticity information representing white, and in the affirmative case, a white balance adjustment value is stored in an EEPROM 112 while in the negative case, the re-acquisition/re-determination of chromaticity information is repeated.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: February 15, 2011
    Assignee: Funai Electric Co., Ltd.
    Inventor: Takayoshi Urisu
  • Publication number: 20110032394
    Abstract: A method for reducing smear effects of a dynamic image is for an image sensor. The image sensor converts a shot image picture into image data, and the image data is divided into an effective region, an upper optical black region (UOB), and a lower optical black region (LOB). The method includes capturing two continuous image data to serve as a first frame image and a second frame image; calculating brightness difference values between individual pixels at corresponding pixel positions of the LOB of the first frame image and the UOB of the second frame image; comparing the brightness difference values with a threshold; obtaining positions to be compensated in the UOB of the second frame image, when the UOB of the second frame image requires brightness compensation; and compensating brightness values of pixels in the effective region of the second frame image corresponding to the positions to be compensated.
    Type: Application
    Filed: October 29, 2009
    Publication date: February 10, 2011
    Applicant: ALTEK CORPORATION
    Inventors: Shih Yuan Peng, Hsin Te Wang
  • Publication number: 20110032430
    Abstract: A video adjustment system for processing video information is disclosed which includes a motion analyzer and an adjustment module. The motion analyzer determines a motion level metric of the video information based on at least one motion parameter. The adjustment adjusts an initial dynamic light scaling factor to provide an adjusted dynamic light scaling factor based on the motion level. The dynamic light scaling factor may be used for luminance compensation and backlight display scaling. The motion level may be based on any type of motion information, such as motion vector information or information indicating a scene change. A distortion module may perform a distortion evaluation of the video information for calculating the initial scaling factor. Alternatively, the distortion module may include a memory which stores predetermined scaling factors based on statistical distortion level characterization.
    Type: Application
    Filed: August 6, 2009
    Publication date: February 10, 2011
    Applicant: Freescale Semiconductor, Inc.
    Inventors: Yolanda Prieto, Zhongli He