Patent application number | Description | Published |
20080278522 | Display apparatus and display panel driver - Disclosed herewith a liquid crystal display apparatus, which includes a liquid crystal display panel that employs the delta arrangement; a subtractive color processing circuit that carries out a subtractive color processing for input image data, thereby generating subtractive color image data; and data line driving circuit that drives the liquid crystal display panel in response to the subtractive color image data. The subtractive color processing circuit carries out a weighting processing that increases or decreases the subtractive color image data according to a line that includes a sub-pixel to be subjected to a subtractive color processing, then carries out an error diffusion processing for the result of the weighting processing, thereby generating subtractive color image data. The subtractive color processing circuit carries out the weighting processing so as to increase the subtractive color image data corresponding to a line and decrease the subtractive color image data corresponding to another line. | 11-13-2008 |
20090009453 | Liquid crystal display device and control driver for a liquid crystal display device - A control driver for a liquid crystal display panel includes: an operation circuit, an LUT (Look-up Table), and a linear interpolation D/A converter. The operation circuit performs a certain operation on input image data to generate operation data, and outputs higher order bit data and lower order bit data of the operation data. The LUT includes a V-T (Voltage-Transmittance) characteristic of the liquid crystal display panel, and outputs first output data and second output data as display data based on the higher order bit data and the V-T characteristic. The linear interpolation D/A converter performs an linear interpolation operation and D/A conversion to generate output voltage supplied to the liquid crystal display panel in response to the first output data, the second output data and the lower order bit data. | 01-08-2009 |
20090021462 | AMPLIFIER OFFSET CANCELING WITHIN DISPLAY PANEL DRIVER - A data driver used for driving a display panel is provided with a grayscale voltage generator circuit generating a plurality of grayscale voltages; and a drive circuitry selecting a selected grayscale voltage from the plurality of grayscale voltages in response to input display data, and outputting a data signal having a voltage level corresponding to the selected grayscale voltage to the display panel. The grayscale voltage generator circuit comprises an amplifier generating a voltage bias; and a voltage generator circuit generating the plurality of grayscale voltages from the voltage bias. The amplifier is designed so that a polarity of an offset voltage of the amplifier is reversible. The polarity of the offset voltage of the amplifier is controlled so that the polarity of the offset voltage of the amplifier used for driving a specific pixel of the display panel in a certain frame period is opposite to that of the offset voltage of the amplifier used for driving the c specific pixel in another frame period. | 01-22-2009 |
20090109211 | Liquid crystal display, LCD driver, and operating method of LCD driver - In an aspect of the present invention, a liquid crystal display apparatus includes: a liquid crystal display (LCD) panel; and an LCD driver. The LCD driver includes: a first memory having a capacity more than a capacity of image data for one frame and configured to receive the image data externally to store therein; a second memory; an overdrive processing circuit configured to compress the image data read out from the first memory to generate a compressed image data, write the generated compressed image data in the second memory, and perform an overdrive process based on the image data of a current frame read out from the first memory and the compressed image data of a previous read out from the second memory to generate a post-process image data; and a data line driving section configured to drive data lines of the LCD panel in response to the post-process image data. | 04-30-2009 |
20090184983 | Displaying apparatus, displaying panel driver and displaying panel driving method - A display apparatus includes a display panel; and a display panel driver configured to drive signal lines of the display panel. The display panel driver includes: a color reducing circuit configured to be possible to generate a first color reduction image data from a first input image data by executing an error diffusion process by using a first error value, and to generate a second color reduction image data from the first input image data by executing the error diffusion process by using a second error value which is different from the first error value; and a driving section configured to drive a first pixel positioned on a horizontal line of the display panel in response to the first color reduction image data, and drive a second pixel positioned on the horizontal line and adjacent to a the first pixel in a horizontal direction, in response to the second color reduction image data. | 07-23-2009 |
20090295813 | Integrated circuit design method for improved testability - A display device is provided with a display panel; and a display panel driver driving the display panel in response to externally-provided image data. The display panel driver includes a display memory for storing the image data, and is configured to perform overdrive processing on the image data read from the display memory. The display panel driver includes an overdrive processing control circuit detecting writing of the image data into the display memory to control operation and halt of a circuit used for the overdrive processing. | 12-03-2009 |
20090322713 | Image processing circuit, and display panel driver and display device mounting the circuit - A display panel driver includes: a compression circuit, when receiving image data of N×M pixels of a target block, generating compressed image data corresponding to the target block by compressing the image data; an image memory storing the compressed image data; a decompression circuit generating decompressed image data by decompressing the compressed image data from the image memory; and a drive circuit driving a display panel in response to the decompressed image data. The compression circuit selects one of a plurality of compression methods based on a correlation between the image data of the N×M pixels, and generates the compressed image data by the selected compression method. The plurality of compression methods includes: a first method calculating a first value corresponding to image data of the N×M pixels and putting the first value in the compressed image data, a second method calculating a second value corresponding to image data of n pixels of the N×M pixels and putting the second value in the compressed image data, and a third method calculating a bit plane reducing data by performing a bit plane reduction process independently on image data of each of the N×M pixels and putting the bit plane reducing data in the compressed image data. | 12-31-2009 |
20100066769 | Display device, controller driver and driving method for display panel - A display device includes a display panel, an environmental sensor, a correction circuit and a driving circuit. The correction circuit is configured to generate a corrected gray-scale data on the basis of input gray-scale data. The driving circuit is configured to drive the display panel in response to the corrected gray-scale data. The correction circuit generates the corrected gray-scale data by executing a correction using a polynomial in which the input gray-scale data are used as variables. Coefficients of the polynomial are changed in response to an output signal of the environmental sensor. | 03-18-2010 |
20100164922 | Backlight brightness control for panel display device - A display device is provided with a display panel; a backlight which illuminates the display panel; and a backlight brightness controller controlling a brightness of the backlight so that the brightness of the brightness is variable in the middle of each frame period. | 07-01-2010 |
20100182261 | Controller driver, display device, and control method therefor - A controller driver according to an exemplary embodiment of the present invention includes: a display memory that stores image data to be displayed on a display panel; a touch panel control circuit that detects a touch panel signal from the touch panel; a cursor memory that stores cursor image data; and a composition processing circuit that combines the cursor image data stored in the cursor memory with the image data stored in the display memory based on the touch panel signal, to generate composite image data. | 07-22-2010 |
20100315406 | Image data transfer to cascade-connected display panel drivers - A display device is provided with a display panel; first to n-th cascade-connected drivers (n being an integer of two or more); a controller transmitting compressed image data to the first driver. The i-th driver of the first to n-th drivers includes a drive circuitry driving the display panel; a first bus adapted to data transfer to the (i+1)-th driver of the first to n-th drivers; a second bus adapted to data transfer to the driver circuitry; and a decompression section receiving the compressed image data from the (i−1)-th driver of the first to n-th drivers or the controller. The decompression section of the i-th driver transfers the received compressed image data to the (i+1)-th driver through the first bus thereof, when the received compressed image data are not associated with the i-th driver. When the received compressed image data are associated with the i-th driver, the decompression section of the i-th driver decompresses the received compressed image data to generate decompressed image data and feeds the decompressed image data to the drive circuitry through the second bus. The drive circuitry drives the display panel in response to the decompressed image data. | 12-16-2010 |
20100332231 | LEXICAL ACQUISITION APPARATUS, MULTI DIALOGUE BEHAVIOR SYSTEM, AND LEXICAL ACQUISITION PROGRAM - A lexical acquisition apparatus includes: a phoneme recognition section | 12-30-2010 |
20110032235 | DISPLAY DEVICE AND OPERATING METHOD THEREOF - A display device is provided with: a display panel; a driver driving the display panel; and a controller adapted to perform multiplied-speed drive processing on original image data externally supplied thereto. The driver is adapted to drive the display panel by multiplied speed driving. When the driver performs the multiplied-speed driving, the controller generates multiplied-speed drive image data by performing the multiplied-speed drive processing on the original image data, generates compressed image data by compressing the multiplied-speed drive image data, and transfers the compressed image data to the driver. In this case, the driver decompresses the compressed image data to thereby reproduce the multiplied-speed drive image data, and drives the display panel in response to the reproduced multiplied-speed drive image data. When the driver does not perform the multiplied-speed driving, on the other hand, the controller transfers the original image data to the driver, and the driver drives the display panel in response to the original image data received from the controller. | 02-10-2011 |
20110148844 | Image processing circuit, and display panel driver and display device mounting the circuit - A display panel driver including a compression circuit configured to, when receiving image data of a set of pixels of a target block, generate compressed image data corresponding to the target block by compressing the image data, the number of the set of pixels being equal to or more than four, an image memory configured to store the compressed image data, a decompression circuit configured to generate decompressed image data by decompressing the compressed image data reading from the image memory, and a drive circuit configured to drive a display panel in response to the decompressed image data, wherein the compression circuit selects one of a plurality of compression methods based on a correlation between the image data of the set of pixels of the target block, and generates the compressed image data by using the selected compression method. | 06-23-2011 |
20110148851 | Clock data recovery circuit, data transfer device for display device, and data transfer method for display device - A clock data recovery circuit includes a sampling circuit SC that samples input data by 2× over sampling, a frequency detection circuit FD that detects a frequency difference between the input data sampled by the sampling circuit SC and a recovery clock, a phase detection circuit PD that detects a phase difference between the input data sampled by the sampling circuit SC and the recovery clock, a voltage control oscillator circuit VCO that outputs the recovery clock to the sampling circuit SC at least according to the phase difference detected by the phase detection circuit PD, and a frequency detection control circuit FDC that stops an operation of the frequency detection circuit FD while receiving display data as the input data. | 06-23-2011 |
20110148942 | Display data correction by numerical operation suitable for display panel driver - A display data correction apparatus is provided with: a control circuit responsive to an input gray-level value for initially providing first to N-th control points (N≧3) defined in a coordinate system in which a first coordinate axis is associated with the input gray-level value and a second coordinate axis is associated with an output gray-level value to be calculated for the input gray-level value; and a processing circuit obtaining an output gray-level value by repeating an update operation in which the first to N-th control points are updated. The degree (N−1) Bezier curve is used as an approximated curve of the gamma curve. The output gray-level value is finally obtained as the coordinate value of a specific point in the degree (N−1) Bezier curve along the second coordinate axis, where the specific point has the coordinate value closest to the input gray-level value along the first coordinate axis. | 06-23-2011 |
20120038621 | Display device, signal line driver, and data transfer method - A liquid crystal display device includes a timing controller, a liquid crystal display panel, multiple data drivers, and gate drivers. The timing controller supplies control data to specified drivers among the data drivers. The specified drivers generate gate driver control signals to control gate drivers in response to the control data, and supply gate driver control signals to the gate drivers. | 02-16-2012 |
20120044216 | Display system and display device driver - A display system includes: a display device, a transmitting device which generates compressed data by performing a compression process on image data corresponding to a display image, and a driver which drives the display device in response to the compressed data received from the transmitting device. The driver includes: a decompression circuit which generates decompressed data by decompressing the compressed data, an FRC circuit configured to perform an FEC process on the decompressed data to generate display data and a drive circuit which drives the display device in response to the display data. The following relation holds: | 02-23-2012 |
20120127188 | IMAGE PROCESSING CIRCUIT, AND DISPLAY PANEL DRIVER AND DISPLAY DEVICE MOUNTING THE CIRCUIT - A display panel driver includes a compression circuit configured to, when receiving image data of a plurality of pixels of a target block, generate compressed image data corresponding to the target block by compressing the image data, an image memory configured to store the compressed image data, a decompression circuit configured to generate decompressed image data by decompressing the compressed image data reading from the image memory, and a drive circuit configured to drive a display panel in response to the decompressed image data. The number of bits of the compression type recognition bit of the compressed image data becomes low, when the correlation between the image data of the plurality of pixels becomes low. | 05-24-2012 |
20120249618 | DATA TRANSMISSION SYSTEM FOR DISPLAY DEVICE, DATA TRANSMISSION METHOD FOR DISPLAY DEVICE AND DISPLAY DEVICE - A data transmission system for a display device, which is an mBnB encoding system encoding a signal of m (m is a natural number) bits into a signal of n (n is a natural number and n>m) bits on the basis of a certain translation table to be transmitted thereafter, the system including: an output driver of outputting a gray scale voltage in accordance with the data decoded at a receiver side, in which in the translation table, a bit pattern with a larger data change index from among 2 | 10-04-2012 |
20120293525 | INTEGRATED CIRCUIT DESIGN METHOD FOR IMPROVED TESTABILITY - A display device is provided with a display panel; and a display panel driver driving the display panel in response to externally-provided image data. The display panel driver includes a display memory for storing the image data, and is configured to perform overdrive processing on the image data read from the display memory. The display panel driver includes an overdrive processing control circuit detecting writing of the image data into the display memory to control operation and halt of a circuit used for the overdrive processing. | 11-22-2012 |
20130002618 | DISPLAY AND DISPLAY CONTROL CIRCUIT - A display control circuit of a display performs generation of overdrive processed data and detection of a proper direction of overdriving from current frame uncompressed compressed data obtained by performing compression processing and uncompression processing on compressed data corresponding to image data of a current frame, and previous frame uncompressed compressed data obtained by performing the compression processing and the uncompression processing on image data of a previous frame, and generates post-correction overdrive processed data by correcting the overdrive processed data according to the detected proper direction. The display control circuit transmits post-correction compressed data obtained by compressing the post-correction overdrive processed data to a driver as transfer compressed data. | 01-03-2013 |
20140022221 | DISPLAY APPARATUS AND DISPLAY APPARATUS CONTROL CIRCUIT - A display apparatus includes: a display device; a display device driver which drives the display device; a compression section adapted to an operation of generating compression data by compression processing performed on image data; and a transmission section which, when receiving compressed data from the compression section, transmits the compressed data to the display device driver by using a serial data signal. The compression section performs the compression processing with a data compression ratio selected in response to a frame rate with which the display device driver drives the display device. The display device driver receives the serial data signal from the transmission section, generates decompressed data by decompressing the compressed data transmitted by the serial data signal, and drives the display device in response to the decompressed data. The data compression ratio used in the compression processing is set so that the transmission rate of the serial data signal from the transmission section to the display device driver is kept constant independently of the frame rate. | 01-23-2014 |