ATRC CORPORATION Patent applications |
Patent application number | Title | Published |
20120139968 | BRIGHTNESS CONTROL APPARATUS, DISPLAY APPARATUS AND LIGHTING APPARATUS - A brightness control apparatus configured to perform brightness control for backlights formed by plural light-emitting elements for a display screen, including: a pulse control signal transmit unit configured to transmit a pulse control signal for performing driving control on the plural light-emitting elements based on a preset brightness control signal; a voltage control unit configured to control a voltage of the pulse control signal obtained by the pulse control signal transmit unit for each set of light-emitting elements of the same color so as to correct brightness variation in a regular state for the plural light-emitting elements; and a current control unit configured to control a current for each of the plural light-emitting elements based on a voltage value obtained by the voltage control unit so as to correct brightness variation due to temperature change or temporal change. | 06-07-2012 |
20120133686 | BACKLIGHT DEVICE WITH LIGHT EMITTING DEVICES IN AN ALTERNATING ARRANGEMENT - A backlight device includes a plurality of light emitting devices arranged at predetermined positions to act as backlight for a display screen, and a plurality of drive circuits that supply currents to the plurality of light emitting devices, wherein the plurality of drive circuits include a first drive circuit and a second drive circuit, and the plurality of light emitting devices include a plurality of first light emitting devices and a plurality of second light emitting devices, the plurality of first light emitting devices being connected in series to the first drive circuit, and the plurality of second light emitting devices being connected in series to the second drive circuit, and wherein the plurality of light emitting devices are spatially placed in an alternating arrangement of one or more of the first light emitting devices and one or more of the second light emitting devices. | 05-31-2012 |
20120120123 | BACKLIGHT APPARATUS, IMAGE DISPLAY SYSTEM AND LIGHTING APPARATUS - A backlight apparatus for illuminating a display unit, includes: light-emitting elements that are arranged at predetermined intervals; and a driving control unit configured to supply currents to the light-emitting elements so as to control driving of the light-emitting elements, wherein the light-emitting elements include a pair of a first light emitting-element and a second light-emitting element that are connected to the driving control unit and that are connected in parallel to each other, in which the first light-emitting element is connected in a direction opposite to a direction in which the second light-emitting element is connected. | 05-17-2012 |
20120056912 | BACKLIGHT APPARATUS, DISPLAY APPARATUS AND LIGHTING APPARATUS - A backlight apparatus for illuminating a display unit, including: a light-emitting element block including a plurality of light-emitting elements that are connected serially; and a driving control unit configured to control driving for each of the plurality of light-emitting elements by supplying a current to the light-emitting element block, wherein each of the plurality of light-emitting elements is provided with a bypass circuit such that, even when a break occurs in a light-emitting element, a current from the driving control unit is supplied to the other light-emitting elements. | 03-08-2012 |
20120056561 | BACKLIGHT APPARATUS, DISPLAY APPARATUS AND LIGHTING APPARATUS - A backlight apparatus including: a light-emitting element block on which a plurality of light-emitting elements are arranged; a plurality of driving control units each of which is configured to control driving for each of the plurality of light-emitting elements by supplying a current to the light-emitting element block; and a main control unit configured to generate a control signal for performing driving control for each of the plurality of driving control units, and to output the control signal to one of the plurality of driving control units, wherein the plurality of driving control units are connected in a daisy chain scheme, and the main control unit includes, in the control signal, identification information for identifying at least one of the plurality of driving control units and control data for performing driving control on light-emitting elements assigned to a driving control unit identified by the identification information. | 03-08-2012 |
20120044277 | BRIGHTNESS CONTROL APPARATUS AND BRIGHTNESS CONTROL METHOD - A brightness control apparatus for performing brightness control on backlights for a display screen based on an input image signal, includes: an image information analysis unit configured to analyze information of at least one item of an average brightness level, brightness histogram information, color histogram information and frequency histogram information that are obtained from an image frame included in the image signal; a block information obtaining unit configured to divide the image frame into blocks and to obtain image information for each of the blocks based on an analysis result of the image information analysis unit; a brightness correction unit configured to perform brightness correction on backlights corresponding to each of the blocks divided by the block information obtaining unit; and a backlight driving control unit configured to perform driving control of the backlights for each of the blocks based on correction information obtained by the brightness correction unit. | 02-23-2012 |
20110164050 | LIQUID CRYSTAL DISPLAY - A liquid crystal display includes a backlight implemented by an LED ( | 07-07-2011 |
20110157482 | VIDEO DISPLAY DEVICE - A video display device displays an image of an input video signal. In the video display device, the video signal is supplied to a frequency component analyzing device, and the frequency component analyzing device extracts a frequency of each of frequency bands from video information of one screen with respect to the image. An image quality control circuit of the video display device performs an image quality control of the image based on the extracted frequencies of the respective frequency bands. | 06-30-2011 |
20110157409 | IMAGE QUALITY ADJUSTING DEVICE, IMAGE QUALITY ADJUSTING METHOD, AND IMAGE QUALITY ADJUSTING PROGRAM - An image quality adjusting device | 06-30-2011 |
20110134159 | LIQUID CRYSTAL DISPLAYING DEVICE AND METHOD - A disclosed liquid crystal displaying device having a liquid crystal displaying unit and a backlight unit includes a signal processing unit dividing an input signal into plural blocks in conformity with a predetermined number of dividing a screen of the backlight unit, a high frequency component acquiring unit acquiring high frequency components for the blocks; a signal component analyzing unit analyzing signal components of the input signal for the blocks, a low frequency component acquiring unit acquiring low frequency components for the blocks, a backlight driving signal generating unit generating a backlight driving signal based on signals acquired by the signal component analyzing unit and the low frequency component acquiring unit, an inverter inverting the backlight driving signal, and a synthesizing unit acquiring a synthesized signal displayed by the liquid crystal displaying unit based on the input signal, the high frequency components, and the inverted driving signal. | 06-09-2011 |
20100231573 | BACKLIGHT DEVICE AND LIQUID CRYSTAL DISPLAYING DEVICE USING THE BACKLIGHT DEVICE - A backlight device which uses a light emitting diode as a light source, the back light device being configured to irradiate a liquid crystal display panel from a rear surface of the liquid crystal display panel, the backlight device having a structure where plural lines are provided on a backlight board with a certain gap, each of the lines being where plural of the light emitting diodes are provided, the backlight device includes a light emitting diode driving part configured to segment an entire screen of the backlight board into plural segmented regions and configured to independently control brightness of the light emitting diodes with a segmented region unit. | 09-16-2010 |
20100226572 | COLOR CORRECTION CIRCUIT AND IMAGE DISPLAY APPARATUS USING SAME - A color correction circuit includes a detection part configured to detect the luminance information and chromaticity histogram information of an input video signal of one of an RGB color space and a YCbCr color space, the chromaticity histogram information including chroma and hue information; and a control part configured to control the color reproduction of the video signal based on the luminance information and the chromaticity histogram information detected by the detection part. The detection part includes a hue detection part configured to convert the video signal to an HSV color space and to detect a hue of the video signal from hues of the HSV color space. | 09-09-2010 |
20100220047 | BACKLIGHT AND LIQUID CRYSTAL DISPLAY UNIT USING SAME - A backlight using multiple light-emitting diodes as a light source and illuminating a liquid crystal display panel from its back, the light-emitting diodes being formed of units, the units each being a minimum unit of m×n (where m and n are natural numbers), includes a driving part configured to drive the light-emitting diodes on a unit-by-unit basis; a block setting part configured to group two or more of the units into a block; and a luminance controlling part configured to control the luminance of the light-emitting diodes of the block independently on a block-by-block basis. | 09-02-2010 |