Class / Patent application number | Description | Number of patent applications / Date published |
345101000 | Data signal compensation in response to temperature | 26 |
20080231587 | DISPLAY DEVICE, METHOD FOR DRIVING DISPLAY DEVICE, AND ELECTRONIC APPARATUS - The invention relates to a display device that performs gradation display by means of a sub-field driving scheme. The display device according to an aspect of the invention has a display area in which a plurality of pixels is arrayed, where the display device controls an ON/OFF state for each of the plurality of pixels for each of a plurality of sub fields that make up one field. One part of the plurality of sub fields constitutes a first time period, whereas the other part of the plurality of sub fields constitutes a second time period. The display device according to an aspect of the invention includes: a first storing section that pre-stores, for each of the sub fields that belong to the first time period, a gradation that is to be displayed and an ON/OFF state of the pixel in association with each other; a first converting section that looks up the first storing section so as to convert an image signal that indicates a gradation that is to be displayed into a first sub-field data that specifies an ON/OFF state of the pixel for each of the sub fields that belong to the first time period; a temperature-data acquiring section that acquires a temperature of the display area; a second storing section that pre-stores, for each of the sub fields that belong to the second time period, a temperature of the display area and an ON/OFF state of the pixel in association with each other; a second converting section that looks up the second storing section so as to convert the temperature acquired by the temperature-data acquiring section into a second sub-field data that specifies an ON/OFF state of the pixel for each of the sub fields that belong to the second time period; a combining section that combines the first sub-field data and the second sub-field data so as to generate a combined sub-field data that specifies an ON/OFF state for each of the plurality of sub fields that make up one field; and a driving section that controls an ON/OFF state for each of the plurality of pixels for each of the plurality of sub fields on the basis of the combined sub-field data. | 09-25-2008 |
20080284712 | Display driver and electronic equipment - A display driver for driving a display element includes an electro-optical layer to which a drive voltage is applied, the drive voltage being a voltage corresponding to a scanning voltage and a data voltage, the scanning voltage being a voltage applied to a scanning electrode, the data voltage being a voltage applied to a data electrode. The display driver includes: a display driver circuit configured to apply the drive voltage to the electro-optical layer, the drive voltage corresponding to one of at least two operation modes including a first drive mode and a second drive mode, the first drive mode having a first temperature range for representing two tones, the second drive mode having a second temperature range for representing two tones, the first temperature range and the second temperature range being different from each other; an input interface configured to input temperature information, the temperature information being information relating to temperature of the display element; and an operation mode determining unit configured to determine operation mode of the display driver circuit on the basis of the temperature information. | 11-20-2008 |
20080291150 | Thermal Compensation Device for Display Device - In order to solve a problem of deviation of a gamma curve of a display device due to temperature variation, the present invention provides a thermal compensation device for compensating a gamma curve of a display device. The thermal compensation device includes a thermal sensor, a storage unit, and a thermal compensation unit. The thermal sensor is used for detecting an ambient temperature inside the display device. The storage unit is used for storing a plurality of numerical data groups. The thermal compensation unit is coupled to the thermal sensor and the storage unit is used for selecting one numerical data group from the plurality of numerical data groups and transforming original image data into compensated image data with the selected numerical data group. | 11-27-2008 |
20080309608 | DC-DC converter with temperature compensation circuit - A DC-DC converter includes a temperature compensation circuit arranged between a feedback differential amplification circuit and an output voltage detection circuit to compensate the variation of the voltage level of the DC output voltage of the converter caused by ambient temperature changes. The temperature compensation circuit includes a temperature detection circuit that detects the ambient temperature and, in response thereto, generates a temperature signal; and a current source circuit that is connected between a feedback signal input terminal of the feedback differential amplification circuit and the output voltage detection circuit. The current source circuit, based on the temperature signal, generates an electrical current and a compensation voltage proportional to the electrical current. The compensation voltage is applied to the DC output voltage to thereby regulate the voltage level of the DC output voltage. The temperature signal is a temperature signal of positive temperature characteristics and/or a temperature signal of negative temperature characteristics. | 12-18-2008 |
20080309609 | Liquid crystal display device with scanning voltage adjusting circuit and method for driving same - An exemplary liquid crystal display device includes a scanning voltage adjusting circuit ( | 12-18-2008 |
20090009463 | LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD OF LIQUID CRYSTAL DISPLAY DEVICE - A display device includes a circuit which is configured to execute such control that write of a non-video signal in pixels is executed in the first period, write of a video signal in the pixels is executed in the second period which partly overlaps the first period, write of the video signal, in the pixels is executed in the third period which partly overlaps the second period, the write of the non-video signal and the write of the video signal are alternately executed in units of one horizontal cycle or horizontal cycles in a period in which the first period overlaps the second period, and the write of the video signal corresponding to the second period and the third period are alternately executed in units of one horizontal cycle or horizontal cycles in a period in which the second period overlaps the third period. | 01-08-2009 |
20090027327 | Liquid crystal display device and liquid crystal television - A liquid crystal display device capable of correcting variation in luminance in a drive beginning period of the liquid crystal display device with a simple configuration by a microcomputer | 01-29-2009 |
20090033610 | LIGHT EMISSION DEVICE, DISPLAY USING THE LIGHT EMISSION DEVICE, METHOD OF DRIVING THE LIGHT EMISSION DEVICE, AND METHOD OF DRIVING THE DISPLAY - A light emission device includes a substrate, a plurality of scan lines on the substrate, a plurality of column lines on the substrate, and a plurality of light emission pixels at crossings between the scan lines and the column lines. Corresponding pixels of the plurality of light emission pixels connected to a common scan light are classified into at least first and second groups, and a timing of a first period for which a first light emission data signal is transmitted to the first light emission pixels is different from a timing of a second period for which a second light emission data signal is transmitted to the second light emission pixels. | 02-05-2009 |
20090040169 | DRIVING MODULE FOR DRIVING LCD PANEL AND METHOD OF FORMING LCD DEVICE - The present invention discloses a driving module for driving an LCD panel and a method of forming an LCD device. The driving module includes: a source driving circuit, for driving the LCD panel; and a heat sink module, coupled to the source driving circuit and integrated with the LCD panel, for dissipating heat generated from the source driving circuit. The method of forming an LCD device including: utilizing a specific semiconductor process to form a LCD panel; and forming a heat sink module integrated with the LCD panel during the specific semiconductor process. | 02-12-2009 |
20090040170 | ELECTRONIC DEVICE COMPRISING A DISPLAY WITH ADJUSTABLE BRIGHTNESS, CHROMATICITY OR BOTH - An electronic device, a method and a computer program product for controlling the operation of a display. The electronic device comprises a display for displaying an RGB (Red/Green/Blue) image, a lighting device coupled to the display for supplying light to the display for enabling display operation thereof, and a color temperature detecting device configured to detect a color temperature of ambient light. A controller is coupled to the lighting device and the color temperature detecting device. The controller then controls the lighting of the lighting device in dependence of the detected color temperature of the ambient light in order to correct brightness or chromaticity or both of an RGB image displayed on the display. | 02-12-2009 |
20090066628 | LIQUID CRYSTAL DISPLAY ELEMENT, METHOD OF DRIVING THE SAME, AND ELECTRONIC PAPER USING THE SAME - A method of driving a liquid crystal display element that applies an AC pulse voltage to drive liquid crystal includes: when the temperature of the liquid crystal is higher than a reference temperature, generating the AC pulse voltage for high temperature having a pulse width that is shorter than a reference pulse width of a reference AC pulse voltage used at the reference temperature; and applying the generated AC pulse voltage to the liquid crystal in a period that is equal to the reference pulse width. | 03-12-2009 |
20090073106 | LIQUID CRYSTAL DISPLAY APPARATUS - In a liquid crystal display apparatus of an OCB type, a frame inversion drive is carried out to invert the polarities of a white level voltage and a black level voltage in conformity with the polarity of an opposed voltage on the frame-to-frame basis, so that the amplitudes of the black level voltage and the white level voltage decrease with rise in environmental temperature. | 03-19-2009 |
20090102779 | Gate-off volatage generating circuit, driving device and liquid crystal dispaly including the same - A gate-off-voltage-generating circuit that can enhance display quality at low temperatures, a driving device, and a liquid crystal display having the same are provided. The driving device includes a boost converter to receive and boost a first input voltage, and output a driving voltage and a pulse signal; a gate-on voltage generator to receive the driving voltage and output a gate-on voltage; and a gate-off voltage generator including a first temperature-compensation unit to receive the driving voltage and output a first temperature-dependent variable voltage, the level of which varies according to the ambient temperature, a first voltage follower to receive and transfer the first temperature-dependent variable voltage, and a first charge-pumping unit to shift the first temperature-dependent variable voltage by the amplitude of the pulse signal and output a gate-off voltage. | 04-23-2009 |
20090102780 | Active Matrix Liquid Crystal Device - In one embodiment of the present invention, an active matrix liquid crystal device (AMLCD) includes an active matrix substrate including an active matrix area and a counter electrode substrate carrying a common electrode whose voltage may vary so as to reduce liquid crystal degradation. A layer of liquid crystal material is disposed between the substrates and a temperature measuring arrangement is provided on the active matrix substrate. This arrangement includes a temperature sensing liquid crystal capacitor which in turn includes a first electrode formed on the active matrix substrate outside the image generating region of the active matrix area and separated from the common electrode, which forms the second electrode of the capacitor, by the liquid crystal layer, which forms the capacitor dielectric. During operation of the active matrix, a measuring circuit repeatedly performs a precharging step, in which the capacitor is precharged to a fixed stable known voltage magnitude, and a step in which a signal representing the capacitance is formed. For example, the charge stored in the capacitor may be charge-shared with a transfer capacitor to form thereacross a voltage representing the capacitance of the liquid crystal capacitor and hence representing the liquid crystal temperature. The sampling is performed repeatedly, preferably in synchronism with addressing performed by the active matrix of the device. The resulting temperature measurement may be used, for example, to compensate the AMLCD for the effects of temperature variation in the liquid crystal properties. | 04-23-2009 |
20090121999 | TEMPERATURE SENSOR FOR LIQUID CRYSTAL DISPLAY DEVICE - A temperature sensing apparatus for a liquid crystal display device is disclosed. The apparatus can measure the device temperature without the existence of a conventional PN junction. The temperature sensing apparatus comprises at least one thin-film transistor (TFT) cell, a variable current source, a buffer and a sensing circuit. Each TFT cell has its respective drain and gate coupled together and a source coupled to a ground The variable current source is coupled to the drain of the TFT cell. The buffer has an input coupled to the drain of the TFT cell. The sensing circuit has an input coupled to an output of the buffer and an output to produce a voltage output signal. The temperature of the TFT cell is determined by inputting two currents at a sub-saturation region of the TFT cell and measuring voltage output signal difference. | 05-14-2009 |
20090267888 | OVERDRIVING APPARATUS AND METHOD THEREOF - An overdriving apparatus and an overdriving method for a liquid crystal display (LCD) panel are disclosed. The overdriving apparatus includes a temperature measuring apparatus and an overdriving signal generator apparatus. The temperature measuring apparatus is coupled to the overdriving signal generator apparatus. The temperature measuring apparatus measures an operation temperature of the LCD panel. The overdriving signal generator apparatus generates a first overdriving signal according to a first image data of a current frame, x second image data of previous x frame(s), and the operation temperature, where x is a natural number. | 10-29-2009 |
20090322668 | MONOCHROMATIC LIQUID CRYSTAL DISPLAY - A liquid crystal display comprises a back light emitting monochromatic light, a liquid crystal display element comprising, a pair of opposing substrates, a nematic liquid crystal layer placed between the pair of opposing substrates, an electrode pattern formed on a nematic liquid crystal layer side of each substrate, a pair of polarizers placed outside the pair of substrates, and a controller which controls light emission of the back light and a voltage applied to the liquid crystal display element, wherein the controller restrain change in retardation of the liquid crystal display element by lowering non-selection voltage applied to the liquid crystal display element when environmental temperature increases and increasing non-selection voltage applied to the liquid crystal display element when environmental temperature decreases. | 12-31-2009 |
20100001943 | HEATING SYSTEM FOR DISPLAY PANEL AND DISPLAY PANEL USING THE SAME - A heating system for a display panel is provided herein, wherein the display panel has a display area. The heating system includes a sensor, a temperature controlling device, and a heating element. The sensor is used for sensing the temperature of the display panel. The temperature controlling device provides a control signal according to the temperature of the display panel. The heating element heats the display panel according to the control signal, and the heating element is a patterned circuitry disposed on a peripheral region of the display area. | 01-07-2010 |
20100214207 | BACKLIGHT LAMP LIGHTING CONTROL DEVICE AND DISPLAY DEVICE INCLUDING SAME - One embodiment of the present invention discloses: a backlight lamp lighting control device including: a PWM signal generating section for generating a PWM signal in accordance with a duty ratio externally inputted, and outputting the PWM signal to a PWM inverter section controlled by the PWM signal so as to drive a fluorescent lamp to light; and a tube current detecting section for detecting a current flowing in the fluorescent lamp, the PWM signal generating section generating the PWM signal based on a current, which is obtained by adjusting the current detected by the tube current detecting section in accordance with the duty ratio externally inputted, so that luminance displayed on a liquid crystal display panel will be substantially uniform over the entire liquid crystal display panel. With the arrangement, a difference between luminance on a high voltage side and luminance on a low voltage side in a lamp of a backlight can be reduced. Therefore, it is possible to provide a backlight lamp lighting control device which can realize substantially uniform display over an entire display screen. | 08-26-2010 |
20120133578 | PER DIE TEMPERATURE PROGRAMMING FOR THERMALLY EFFICIENT INTEGRATED CIRCUIT (IC) OPERATION - Methods and apparatus to provide per die temperature programming for thermally efficient integrated circuit (IC) operation are described. In some embodiments, the junction temperature of an IC component is determined, e.g., to reduce power consumption and/or improve performance. Other embodiments are also described. | 05-31-2012 |
20120274544 | TEMPERATURE ESTIMATING APPARATUS, METHOD FOR CONTROLLING THE SAME, AND IMAGE DISPLAY APPARATUS - A temperature estimating apparatus, which is provided for a backlight having a plurality of light source blocks each having one light source or a plurality of light sources so that light emission of the light source of each of the light source blocks can be regulated independently, comprises an acquiring unit which acquires a luminance of the light source for each of the light source blocks; a temperature sensor which measures a temperature of at least any one of an internal and external temperature of a casing of the image display apparatus having the backlight; and an estimating unit which estimates a temperature of the light source for each of the light source blocks on the basis of a measured value obtained by the temperature sensor and a luminance value of the light source of each of the light source blocks acquired by the acquiring unit. | 11-01-2012 |
20130120233 | LIQUID CRYSTAL DISPLAY AND METHOD OF DISPLAYING IMAGE THEREON - A liquid crystal display includes a pixel, a memory configured to store a plurality of look-up tables, an image signal modification unit configured to obtain a modified look-up table based on a first look-up table and a second look-up table among the plurality of look-up tables and modify an input image signal based on the modified look-up table to generate a modified image signal, and a data driver configured to convert the modified image signal generated by the image signal modification unit into a data voltage and to supply the data voltage to the pixel. The liquid crystal display includes a plurality of regions. The liquid crystal display is configured to maintain temperature information of the plurality of regions, and the image signal modification unit is configured to modify the input image signal based on the temperature information. | 05-16-2013 |
20130127699 | SYSTEM AND METHOD FOR TIMING ADJUSTMENT OF A BACKLIGHT MODULE - Examples of the present invention disclose system and method timing adjustment of a backlight module for a display. According to one example, a temperature of the display is monitored and a response time associated with the display is determined based on the temperature. Furthermore, a power-on timing and/or a power-off timing of the backlight module is adjusted based on the determined response time and the monitored temperature. | 05-23-2013 |
20160012760 | DISPLAY DEVICE | 01-14-2016 |
20160133204 | METHOD FOR CONTROLLING A DISPLAY OF AN ELECTRONIC DEVICE - An electronic device and a method of controlling a temperature in an electronic device are provided. The method includes measuring a temperature of at least one part of the electronic device, determining an algorithm corresponding to the measured temperature of the at least one part, and displaying an image based on the determined algorithm. | 05-12-2016 |
20160189651 | LIQUID CRYSTAL DISPLAY AND DRIVING METHOD THEREOF - Among data voltages applied to a plurality of pixels on a display panel, a first data voltage is shifted from a first original data voltage by a first value, a second data voltage is shifted from a second original data voltage by a second value, and a third data voltage is shifted from a third original data voltage by a third value to compensate for AC and DC afterimages. A common voltage generator provides an optimal common voltage for the third data voltage when the temperature of the liquid crystal panel assembly is lower than a reference temperature and provides an optimal common voltage for the first data voltage or the second data voltage when the temperature of the liquid crystal panel assembly is higher than or equal to the reference temperature. The first, second, and third values correspond to respective kickback voltages of the respective gray level data voltages. | 06-30-2016 |