Patent application number | Description | Published |
20080218451 | Organic electroluminescence display - The voltage-current property of the specific pixel is measured to store the data on a single line in a line memory. The property data of adjacent pixels are compared. A failure determination unit detects whether or not the pixel to be compared is faulty. If it is determined as being faulty, the faulty pixel is removed from the pixel group to be compared. The burn-in determination unit performs the comparison using normal pixels only to provide the correct burn-in data. The calculation unit reflects the burn-in data in the image data from the host. | 09-11-2008 |
20080218453 | Organic electroluminescence display - In an organic EL display, correction is made for a difference in screen luminance between the case of measuring characteristics of OLED elements, and the case of not measuring the characteristics of the OLED elements. A data line for feeding image data items, and a detection line for measuring the characteristics of the OLED elements are connected to respective pixels. Detection of the characteristics of the OLED elements is executed by utilizing a specified period of a frame period. Because an image-displaying period is limited in a frame where measurement of the characteristics of the OLED element | 09-11-2008 |
20080218499 | Display device - To shorten the measuring time of the characteristics of light emission of OLED elements for feedback to image data for image display in an organic EL display device. Pixels that emit red lights, pixels that emit green lights, and pixels that emit blue lights are arranged on a screen in a matrix manner. A detection system is provided on the upper side of the screen. A detection line extending from the detection system is coupled to the respective pixels through analog switches and digital switches controlled by switch controlling lines. A detection scanning circuit is provided on the right side of the screen. Detection switch controlling lines extend from the detection scanning circuit. By appropriately selecting the analog switches, the switch controlling lines, and the detection switch controlling lines, the voltage-current characteristics of plural pixels are measured at the same time. | 09-11-2008 |
20080224962 | IMAGE DISPLAY DEVICE - An image display device includes switches directly connected a constant current source to a self-luminous element to be able to detect a characteristic of the self-luminous element, generate a coordinates and convert information of the characteristic and coordinates into a system communication signal, transferring an input with a temperature variation to a system side. | 09-18-2008 |
20080291193 | DISPLAY DEVICE - Detection voltages of self light emitting elements in a self-luminous display panel are detected by a detection circuit through a selection switch in a data line drive circuit via pixel detection switches and interactive signal lines. The detection operation is performed by making use of a power source supply time and a retracing period. | 11-27-2008 |
20080291224 | IMAGE DISPLAY DEVICE - With the use of pixel control parts for controlling display elements in response to display data using a display-use voltage source and display control parts for supplying the display data to the pixel control parts, the display data is displayed on a display part. Further, the display data is corrected by detecting states of the display elements. A voltage of the display-use voltage source is preliminarily set to a fixed higher voltage, and a gray scale of the display data is elevated in response to a degradation state of the display element. Accordingly, it is possible to perform a display while maintaining the maximum brightness even when the display element is degraded. Further, the contrast can be maintained by correcting the gray scales of the display data by performing only the digital calculation. | 11-27-2008 |
20090027313 | Imaging device - To determine a deterioration and maintain a high-quality image without unevenness of brightness by performing a precise correction, a detection scanning line for selecting a pixel which detects a deterioration of a pixel, a detection line for informing the outside of the display area of the property of a pixel selected for detecting the deterioration, a deterioration determination means for determining a deterioration amount based on a voltage corresponding to a current detected by the detection line, and a deterioration correction means (computation circuit) for reflecting the determination result of the deterioration determination means in image data supplied to the pixel, are provided. | 01-29-2009 |
20090027314 | Imaging device and method of correction pixel deterioration thereof - In a display mode, a signal driving circuit (DAC) transmits image signals to the pixels selected by a scanning circuit for display and first switches of switch units. Then, a power supply circuit supplies a current corresponding to the transmitted signal to the pixels. Then, organic EL elements provided in the pixels are driven to emit light, thereby displaying an image. In order to correct the deterioration of the organic EL elements, first, a constant current flows from a current source to the organic EL elements of the pixels selected by a scanning circuit for detection and second switches and a voltage corresponding to the constant current applied to the organic EL element is detected. The detected voltage is input to an AD converter through a buffer amplifier, and the AD converter converts the voltage into a digital value, and transmits the digital value to a signal correction control unit. When the organic EL element deteriorates, the detected digital value varies. Therefore, the signal correction control unit corrects the signal from the signal driving circuit, thereby correcting the deterioration of the organic EL element. | 01-29-2009 |
20090027374 | Display device - To implement brightness change of pixels due to variations in environmental temperatures with low electric power, the display device includes a display part having a display area arrayed with plural pixels, a display scanning circuit and a signal driving circuit for driving the plural pixels, and a power circuit that supplies a current for illuminating each of the plural pixels with brightness corresponding to a display signal from the signal driving circuit; and a detection unit that includes: a monitor element for driving a constant current that detects environmental temperatures; and plural constant current sources, detects a voltage value relating to the luminous intensity of the pixels by the monitor element to generate a signal to control an output voltage of the power circuit, and changes over a constant current source of the monitor element according to a voltage value detected in the detection unit. | 01-29-2009 |
20090066614 | DISPLAY DEVICE - A display device including independent power sources for a display use and a detection use, display elements, switches ( | 03-12-2009 |
20090073094 | IMAGE DISPLAY DEVICE - To detect reduction of luminous efficiency of respective light-emitting elements arranged in a matrix state while suppressing increase of costs. | 03-19-2009 |
20090109149 | Image display device - An image display device having a plurality of pixel, a plurality of signal lines for inputting an image voltage to each of the plurality of pixels, and a pixel selecting unit for selecting from the plurality of pixels a pixel into which the image voltage is to be written, in which each of the pixels has a light emitting device of a current driving-type, a driving transistor connected between a power line and the light emitting device, and a capacitance device having one end connected to a gate electrode of the driving transistor, the image voltage is input to the other end of the capacitance device during the writing period, an inclined wave voltage which changes a voltage level thereof according to time is input to the other end of the capacitance device during a light emission period following the writing period. | 04-30-2009 |
20090141015 | Image display device - A shift in the frame of a moving image in an image display device using self-luminous elements is made hard to see. | 06-04-2009 |
20090141017 | Image display device and driving method for same - An image display with high brightness where a long time can be secured for light emission of self-luminous elements can be implemented using only line memories. | 06-04-2009 |
20090146928 | Organic Electroluminescence Display Device - Before a reset operation in which a threshold voltage Vth of an organic light emitting diode (OLED) driving thin film transistor (TFT) is compensated is performed by a first reset TFT switch, a second reset TFT switch is turned on to apply a reset reference potential to a gate of the OLED driving TFT. Accordingly, an operation point of the OLED driving TFT can be stably set even when a power supply is low. In the reset operation, it is unnecessary to close a lighting TFT switch and cause an OLED element to emit light, whereby constant can be improved. | 06-11-2009 |
20090179832 | Organic electroluminescence display device - An organic electroluminescence display device is provided having a display section including a plurality of pixels arranged in a matrix; and a detection section for detecting a luminance characteristic of an OLED element in each of the pixels. The detection section includes a first path for allowing a detected characteristic value to pass therethrough and a second path for attenuating the detected characteristic value. A first switch is provided for the first path whereas a second switch is provided for the second path, the second switch being opened when the first switch is closed. The detected characteristic value having passed through any one of the first path and the second path is input to a same analog-to-digital converter to be converted into a digital quantity. | 07-16-2009 |
20090243973 | DISPLAY DEVICE - Provided is a display device including: a display section including a plurality of pixels which emit light in an amount varied depending on an amount of current; signal lines used to input a display signal voltage to the pixels; a switch circuit which switches between the signal lines to output signals corresponding to pixel states of the pixels, the pixel states being obtained through a supply of a power source to the pixels; and an A/D converter which sequentially detects the signals corresponding to the pixel states of the pixels along a horizontal line of the display section, in which the A/D converter includes a circuit for changing a reference voltage of the A/D converter, and is structured so as to perform block-by-block detection of signals corresponding to pixel states of pixels in each of a plurality of blocks into which the pixels in the horizontal line are divided. | 10-01-2009 |
20090244043 | Image Display Device - To provide an image display device having a circuit for solving burning phenomenon without increasing the size of the circuit. An image display device is provided having a display unit formed using display devices, a signal line for inputting a display signal voltage to the display unit, and a display control unit for controlling the display signal voltage, the image display device comprising a detection power source, a switch for causing a current of the detection power source to flow to the display device, a detection circuit for detecting the current, and a detection information storage circuit for storing information, and compensating the display signal voltage, using the information, wherein using a first reference voltage, and current detection is carried out, the detection circuit feeds back the current detected to set a second reference voltage different from the first reference voltage, and carries out current detection. | 10-01-2009 |
20090303162 | Image Display Device - Provided is an image display device in which deterioration of a self-light-emitting element within a pixel is corrected accurately. A driver transistor provided in each pixel to drive the self-light-emitting element is driven in a saturation region. A voltage detection unit detects a voltage across the self-light-emitting element of each pixel, which is observed when a constant current is supplied to the self-light-emitting element. When the voltage detected by the voltage detection unit exceeds a threshold voltage, one of a reference voltage and a power supply voltage is controlled to keep an operation region of the driver transistor to the saturation region in every one of a plurality of the pixels of the image display device. | 12-10-2009 |
20090303163 | Image Display Device - Provided is an image display device in which deterioration of a self-light-emitting element within a pixel is corrected accurately. A detection unit detects, within a detection period, a difference in characteristics between self-light-emitting elements of adjacent pixels. A first subtraction circuit outputs a differential voltage between a reference voltage and an image voltage to a self-light-emitting element that is determined by the detection unit as a deteriorated element. An amplifier amplifies an output of the first subtraction circuit with a gain [1/{1-(α/100)}] | 12-10-2009 |
20090309865 | Image Display Device - During a first period of a set period, a reset switch element of each pixel is turned on to converge a voltage at a control electrode of a TFT to a predetermined voltage, and a step signal having a first voltage level is supplied from a step signal generation circuit. During a second period of the set period, the reset switch element is turned off, and a step signal having a second voltage level is supplied from the step signal generation circuit, whereby a voltage exceeding a second power supply voltage or a voltage exceeding a voltage range supplied from a signal driver section is input as a characteristic value set voltage to the control electrode. Accordingly, even when a relationship between a gate voltage and a drain current of the thin film transistor exhibits a hysteresis characteristic, uniform display can be achieved. | 12-17-2009 |
20100033410 | DISPLAY DEVICE - An image display device comprises a unit which divides one line into a plurality of blocks (blocks A, B, and C) in a horizontal direction and detects in parallel, a unit which collectively detects a plurality of lines (lines A and B) in a vertical direction in parallel. The unit detects a pixel state of a pixel of the block (for example, block A) and a pixel state of the same pixel as an adjacent block (for example, block B), and corrects a variation between the detection result of the block and the detection result of the adjacent block. The unit detects a pixel state of a pixel through the line (for example, line A) and a pixel state of the same pixel through a different line (for example, line B), and corrects a variation between the detection result of the line and the detection result of the different line. | 02-11-2010 |
20100053144 | IMAGE DISPLAY DEVICE - Provided is an image display device including: a plurality of pixel scanning lines; a plurality of signal lines; and a plurality of pixel circuits corresponding to intersections between the pixel scanning lines and the signal lines. Each of the pixel circuits includes: a driver transistor; a light emitting element for emitting light based on the current supplied from the driver transistor; a pixel switch for generating a potential based on an image signal and a scanning signal; a capacitor element for controlling the driver transistor based on a potential difference caused by the potential supplied from the pixel switch; and a reset switch for setting a potential at an end of the capacitor element to a predetermined state based on a scanning signal supplied from one of the pixel scanning lines preceding the scanning signal which corresponds to the corresponding one of the plurality of pixel circuits. | 03-04-2010 |
20100085349 | DISPLAY DEVICE - Provided is a display device capable of freely setting correction based on a state of a luminance gradient in a self-emission display device for eliminating the luminance gradient. The display device includes: a data line drive circuit for outputting emission control signals for controlling light emission of display elements during a retrace period during which display signal voltages are not output; and an emission power supply circuit for supplying power supply voltages for the light emission of the display elements to power supply lines from at least one of external sides of a display region corresponding to a group including the display elements. The data line drive circuit generates and outputs the emission control signals different among data lines. | 04-08-2010 |