Patent application number | Description | Published |
20080211396 | LIGHT EMITTING DEVICE AND MANUFACTURING METHOD THEREOF - There is provided a method for manufacturing a light emitting device in which no copy-in is caused in the case of a light emitting device having a glossy cathode. An uneven portion is formed on the surface of a cathode which is in contact with an organic layer in a pixel portion, and incident light is reflected in all directions. An insulating film having a high light absorption property is formed in a driver circuit portion, and the copy-in becomes invisible to the observer. | 09-04-2008 |
20080246407 | Display Device - The invention provides an active matrix EL display device which can perform a clear multi-gray scale color display. In particular, the invention provides a large active matrix EL display device at low cost by a manufacturing method which can selectively form a pattern. Power supply lines in a pixel portion are arranged in matrix by the manufacturing method which can selectively form a pattern. Further, capacitance between wirings is reduced by providing a longer distance between adjacent wirings by the manufacturing method which can selectively form a pattern. | 10-09-2008 |
20080252363 | Semiconductor Device and Electronic Appliance Using the Same - A semiconductor device with less power consumption and an electronic appliance using the same. The semiconductor device of the invention is supplied with a first potential from a high potential power source and a second potential from a low potential power source. Upon input of a first signal to an input node, an output node outputs a second signal. With the semiconductor device of the invention, a potential difference of the second signal can be controlled to be smaller than a potential difference between the first potential and the second potential, thereby power consumption required for charging/discharging wires can be reduced. | 10-16-2008 |
20090001387 | METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE - To provide a method for manufacturing a large semiconductor device which easily operates normally and has excellent current characteristics. A first single-crystal semiconductor layer is provided over an insulating substrate. Then, the first single-crystal semiconductor layer is processed into an island shape. After that, a second single-crystal semiconductor layer is provided over the insulating substrate so as to overlap with part of a region where the first single-crystal semiconductor layer is provided. After that, the second single-crystal semiconductor layer is processed into an island shape. Thus, defects at joint portions in the case of providing the single-crystal semiconductor layers can be reduced. | 01-01-2009 |
20090009676 | Semiconductor Device and Driving Method Thereof - Brightness irregularities that develop in a light emitting device due to is persion among pixels in the threshold values of TFTs used for supplying electric current to light emitting devices become obstacles to improved image quality of the light emitting device. As an image signal input to a pixel from a source signal line, a desired electric potential is applied to a gate electrode of a TFT for supplying electric current to an EL device, through a TFT having its gate and drain connected to each other. A voltage equal to the TFT threshold value is produced between the source and the drain of the TFT | 01-08-2009 |
20090021539 | Light Emitting Device, Method of Driving a Light Emitting Device, Element Substrate, and Electronic Equipment - A display device capable of obtaining a constant luminance without being influenced by temperature change is provided as well as a method of driving the display device. A current mirror circuit composed of a first transistor and a second transistor is provided in each pixel. The first transistor and second transistor of the current mirror circuit are connected such that their drain currents are kept almost equal irrespective of the level of load resistance. By controlling the OLED drive current using the current mirror circuit, a change in OLED drive current due to fluctuation in characteristics between transistors is avoided and a constant luminance is obtained without being influenced by temperature change. | 01-22-2009 |
20090051674 | Display device and driving method thereof, semiconductor device, and electronic apparatus - To constitute a display panel only by transistors having the same conductivity type is difficult if a p-type transistor is adopted as a driving transistor. By constituting a circuit formed in the display panel by transistors having the same conductivity type, manufacturing process can be reduced, and cost reduction can be achieved. In the invention, an n-type transistor is used as a driving transistor for driving a light emitting element, and the driving transistor and the light emitting element constitute a source follower circuit. | 02-26-2009 |
20090167404 | Semiconductor Device, Electronic Device Having the Same, and Driving Method of the Same - A digital circuit which can operate normally regardless of binary potentials of an input signal is provided. A semiconductor device comprising a correcting unit and one or a plurality of circuit elements, the correcting unit including a first capacitor, a second capacitor, a first switch, and a second switch, wherein the first electrode of the first capacitor is connected to an input terminal, the supply of a first potential to the second electrode of the first capacitor is controlled by the first switch, the supply of a second potential to the second electrode of the second capacitor is controlled by the second switch, and a potential of the second electrode of the first capacitor or a potential of the second electrode of the second capacitor is supplied to the one or the plurality of circuit elements. | 07-02-2009 |
20090284522 | Electronic Device and Method of Driving the Same - To provide a novel driving method for driving an electronic device by using digital gray scale and time gray scale in combination, which secures high duty ratio, which can display an image normally even when a sustain period is shorter than an address period, and which is hardly affected by dulled signal waveform. In a sub-frame period ( | 11-19-2009 |
20090309823 | ELECTRONIC DEVICE AND DRIVING METHOD THEREOF - A pixel is provided in which normal display of an image is possible even if a sustain period is shorter than an address period in a driving method combining digital gray scales and time gray scales, and in which operation can be compensated by changing the electric potential of a signal line even for a case in which the EL driver transistor becomes normally on due to deterioration. One of a source region and a dram region of an erasure TFT is connected to an electric current supply line, and the remaining one of the source region and the drain region is connected to a gate signal line. It is possible to change the voltage between a gate and a source of an EL driver TFT by changing the electric potential of the gate signal line so that the EL driver TFT is placed in a non-conducting state with certainty with this structure, even for cases in which the EL driver TFT becomes normally on due to a shift in the value of its threshold voltage. | 12-17-2009 |
20090315066 | Electro-Optical Device - An object of the present invention is to realize a numerical aperture higher than that of a pixel having a conventional construction by using a pixel circuit having a novel construction in an electro-optical device. Therefore, it is utilized that the electric potential of a gate signal line in a row except for an i-th row is set to a constant electric potential in a period except for when a gate signal line ( | 12-24-2009 |
20090316069 | ILLUMINATION APPARATUS - A point light source is converted into a plane light source having a satisfactory uniformity. The point light source is converted into a line light source by means of a linear light guiding plate, and further into the plane light source by means of a plane-like light guiding plate. Light from the point light source is reflected at a lamp reflector to be incident on at least two side surfaces of the plane-like light guiding plate. | 12-24-2009 |
20100141621 | SEMICONDUCTOR DEVICE - Solved is a problem of attenuation of output amplitude due to a threshold value of a TFT when manufacturing a circuit with TFTs of a single polarity. In a capacitor ( | 06-10-2010 |
20100171424 | Self-Light Emitting Device and Electrical Appliance Using the Same - A self-light emitting device and an electrical appliance including the same are provided, in which extracting efficiency of light from a light emitting element, especially in an EL element, can be improved. A light scattering body formed by etching a transparent film is provided on an insulator so that the extracting efficiency of light can be improved, and the self-light emitting device with high efficiency of light emission can be provided. | 07-08-2010 |
20100193788 | AREA SENSOR AND DISPLAY APPARATUS PROVIDED WITH AN AREA SENSOR - An area sensor of the present invention has a function of displaying an image in a sensor portion by using light-emitting elements and a reading function using photoelectric conversion devices. Therefore, an image read in the sensor portion can be displayed thereon without separately providing an electronic display on the area sensor. Furthermore, a photoelectric conversion layer of a photodiode according to the present invention is made of an amorphous silicon film and an N-type semiconductor layer and a P-type semiconductor layer are made of a polycrystalline silicon film. The amorphous silicon film is formed to be thicker than the polycrystalline silicon film. As a result, the photodiode according to the present invention can receive more light. | 08-05-2010 |
20100321548 | MOS SENSOR AND DRIVE METHOD THEREOF - To provide a drive method for finding out an optimum storage period quickly. | 12-23-2010 |
20110018041 | Semiconductor Device and Method of Driving the Same - To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed. | 01-27-2011 |
20110090206 | LIGHT EMITTING DEVICE AND ELECTRONIC DEVICE - A TFT for controlling the amount of current flowing into a power supply line when an EL element does not emit light (electric discharge TFT) is provided in each pixel. When an EL driving TFT is turned ON to make an EL element emit light, the electric discharge TFT is turned OFF. On the other hand, the electric discharge TFT is turned ON when the EL driving TFT is turned OFF and no EL element emit light. Therefore variation of the difference in electric potential over the length of a power supply line depending on an image to be displayed is contained. Thus reduced is the difference in amount of current flowing into EL elements in adjacent pixels while the EL elements emit light, thereby avoiding crosstalk. | 04-21-2011 |
20110266946 | Light Emitting Device and Manufacturing Method Thereof - There is provided a method for manufacturing a light emitting device in which no copy-in is caused in the case of a light emitting device having a glossy cathode. An uneven portion is formed on the surface of a cathode which is in contact with an organic layer in a pixel portion, and incident light is reflected in all directions. An insulating film having a high light absorption property is formed in a driver circuit portion, and the copy-in becomes invisible to the observer. | 11-03-2011 |
20110298396 | Light Emitting Device and Electronic Equipment Using the Same - A light emitting device is provided which is capable of displaying in desired colors stably by controlling a change in luminance of OLED when an organic light emitting layer is degraded or there is a change in temperature of the surroundings. A reference value for the amount of current flowing into a pixel portion is calculated from data of a video signal. Then, the pixel portion displays an image in accordance with the data of the video signal and the drive current at the time is measured for all of OLEDs in the pixel portion. The two voltage values supplied from a variable power supply to the pixel portion are corrected such that the measured drive current approaches the reference value. With the above structure, lowering of luminance which accompanies degradation of an organic light emitting layer is prevented and a clear image can be displayed as a result. | 12-08-2011 |
20110304525 | DISPLAY DEVICE AND ELECTRONIC DEVICE - It is an object of the present invention to provide a display device in which a reverse current sufficient enough to insulate a short-circuited point flows and a transistor using amorphous silicon is used is applied. The display device includes a switching transistor that controls an input of a video signal, a driving transistor that controls a current flowing in a forward direction to a light emitting element, and an AC transistor that controls a current flowing in a reverse direction to the light emitting element; and a reverse bias current can be applied to the light emitting element. Furthermore, the above-described transistors are N-channel transistors. | 12-15-2011 |
20120001889 | ELECTRIC FIELD DRIVING DISPLAY DEVICE - It is an object to provide an electric field driving display device capable of displaying a high quality image and to provide an electric field driving display device in which residual images in an outline of a pixel is prevented from occurring. An insulating film is formed over a second electrode and a plurality of first electrodes are provided over the insulating film. Each of the first electrodes is electrically connected to the second electrode. The second electrode is provided to partly overlap a region between the adjacent two first electrodes. In other words, viewing the top and the bottom of the display device, the adjacent first electrodes are provided apart from each other and the second electrode is provided to embed a space between the adjacent first electrodes. | 01-05-2012 |
20120007090 | Area Sensor and Display Apparatus Provided With An Area Sensor - An area sensor of the present invention has a function of displaying an image in a sensor portion by using light-emitting elements and a reading function using photoelectric conversion devices. Therefore, an image read in the sensor portion can be displayed thereon without separately providing an electronic display on the area sensor. Furthermore, a photoelectric conversion layer of a photodiode according to the present invention is made of an amorphous silicon film and an N-type semiconductor layer and a P-type semiconductor layer are made of a polycrystalline silicon film. The amorphous silicon film is formed to be thicker than the polycrystalline silicon film. As a result, the photodiode according to the present invention can receive more light. | 01-12-2012 |
20120025193 | Semiconductor Device and Driving Method Thereof - A voltage equal to the threshold value of a TFT ( | 02-02-2012 |
20120037964 | ILLUMINATION APPARATUS - A point light source is converted into a plane light source having a satisfactory uniformity. The point light source is converted into a line light source by means of a linear light guiding plate, and further into the plane light source by means of a plane-like light guiding plate. Light from the point light source is reflected at a lamp reflector to be incident on at least two side surfaces of the plane-like light guiding plate. | 02-16-2012 |
20120119270 | DRIVING METHOD OF A SEMICONDUCTOR DEVICE - A horizontal scanning period is divided into n parts (n is a natural number), so that horizontal scanning can be performed (n×y) times in one frame period. That is, n signals can be outputted from each pixel, and storage times of the n signals are different from one another. Then, since a signal suited to the intensity of light irradiated to each pixel can be selected, information of an object can be accurately read. | 05-17-2012 |
20120127065 | Display Device and Method of Driving the Same - Disclosed is an EL display device by which accurate gray scales can be obtained. The EL display device comprises a source signal line driving circuit which includes an operation amplifier electrically connected to a correction TFT and a source signal line, and a pixel which includes an EL element and a driving TFT. An inputted analog signal voltage is converted into a current, the current is converted into a gate-source voltage of the correction TFT that has the same polarity as the driving TFT, the gate-source voltage is supplied as a source line signal to the source signal line, and the source line signal is applied to a gate electrode of the driving TFT. Thus the EL element can emit light at a luminance linearly corresponding to the inputted analog signal voltage. | 05-24-2012 |
20120153293 | Display Device - There is provided an active matrix EL display device that can display a clear multi gray-scale color display to reduce the shift in the potential caused by the potential drop due to the wiring resistance of a power source supply line, in order to decrease the unevenness in a display region. A plurality of drawing out ports of the power source supply line are arranged. Further, in the wiring resistance between the external input terminal and the pixel portion power source supply line, potential compensation is performed by supplying potential to the power source supply line by a feedback amplifier. Further, in addition to above structure, the power source supply line may be arranged in a matrix. | 06-21-2012 |
20120206425 | ELECTRONIC DEVICE AND METHOD OF DRIVING ELECTRONIC DEVICE - Problems such as insufficient brightness, caused by a reduction in duty ratio (the ratio of a light emitting period and a non-light emitting period), are improved upon in accordance with using a novel method of driving and a novel circuit in an electronic device. Signals are written into pixels of a plurality of differing lines during one gate signal line selection period. By arbitrarily setting, to a certain extent, the time from when a signal is input into the pixels of a certain line until the next signal is input to the same pixels, while ensuring the time for writing into the pixels, a sustain (turn on) period can be arbitrarily set and a high duty ratio is realized. | 08-16-2012 |
20120229015 | Light Emitting Device and Electronic Device - A TFT for controlling the amount of current flowing into a power supply line when an EL element does not emit light (electric discharge TFT) is provided in each pixel. When an EL driving TFT is turned ON to make an EL element emit light, the electric discharge TFT is turned OFF. On the other hand, the electric discharge TFT is turned ON when the EL driving TFT is turned OFF and no EL element emit light. Therefore variation of the difference in electric potential over the length of a power supply line depending on an image to be displayed is contained. Thus reduced is the difference in amount of current flowing into EL elements in adjacent pixels while the EL elements emit light, thereby avoiding crosstalk. | 09-13-2012 |
20120236221 | SEMICONDUCTOR DEVICE - Solved is a problem of attenuation of output amplitude due to a threshold value of a TFT when manufacturing a circuit with TFTs of a single polarity. In a capacitor ( | 09-20-2012 |
20120256241 | Semiconductor Device and Method of Driving the Same - To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed. | 10-11-2012 |
20120327059 | DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - A semiconductor device having a configuration hardly generating variations in the current value due to a deteriorated EL element is to be provided. A capacitance element is disposed between the gate and the source of a driving TFT, video signals are inputted to the gate electrode, and then it is in the floating state. Suppose an EL element is deteriorated and the anode potential rises, that is, the source potential of the driving TFT rises, the potential of the gate electrode of the driving TFT, being in the floating state by coupling of the capacitance element, is to rise by the same amount. Accordingly, even when the anode potential rises due to the deteriorated EL element, the rise is added to the gate electrode potential as it is, and the gate-source voltage of the driving TFT is allowed to be constant. | 12-27-2012 |
20130009184 | ELECTRO-OPTICAL DEVICE - An object of the present invention is to realize a numerical aperture higher than that of a pixel having a conventional construction by using a pixel circuit having a novel construction in an electro-optical device. Therefore, it is utilized that the electric potential of a gate signal line in a row except for an i-th row is set to a constant electric potential in a period except for when a gate signal line ( | 01-10-2013 |
20130057174 | LIGHT-EMITTING DEVICE AND DRIVING METHOD THEREOF - In a light emitting device, luminance irregularities caused by fluctuation in threshold of TFTs for supplying a current to EL elements among pixels hinder the light emitting device from improving the image quality. A voltage equal to the threshold of a TFT | 03-07-2013 |
20130129050 | Semiconductor Device and Method of Driving the Same - To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed. | 05-23-2013 |
20130146881 | AREA SENSOR AND DISPLAY APPARATUS PROVIDED WITH AN AREA SENSOR - An area sensor of the present invention has a function of displaying an image in a sensor portion by using light-emitting elements and a reading function using photoelectric conversion devices. Therefore, an image read in the sensor portion can be displayed thereon without separately providing an electronic display on the area sensor. Furthermore, a photoelectric conversion layer of a photodiode according to the present invention is made of an amorphous silicon film and an N-type semiconductor layer and a P-type semiconductor layer are made of a polycrystalline silicon film. The amorphous silicon film is formed to be thicker than the polycrystalline silicon film. As a result, the photodiode according to the present invention can receive more light. | 06-13-2013 |
20130228783 | Display Device and Method for Driving the Same - A semiconductor device having a configuration hardly generating variations in the current value due to a deteriorated EL element is to be provided. A capacitance element is disposed between the gate and the source of a driving TFT, video signals are inputted to the gate electrode, and then it is in the floating state. Suppose an EL element is deteriorated and the anode potential rises, that is, the source potential of the driving TFT rises, the potential of the gate electrode of the driving TFT, being in the floating state by coupling of the capacitance element, is to rise by the same amount. Accordingly, even when the anode potential rises due to the deteriorated EL element, the rise is added to the gate electrode potential as it is, and the gate-source voltage of the driving TFT is allowed to be constant. | 09-05-2013 |
20130234195 | SEMICONDUCTOR DEVICE - A light emitting device capable of performing signal electric current write-in operations at high speed and without dispersion in the characteristics of TFTs structuring pixels influencing the brightness of light emitting elements is provided. The gate length L of a transistor in which an electric current flows during write-in of a signal electric current is made shorter than the gate length L of a transistor in which electric current supplied to EL elements flows during light emission, and high speed write-in is thus performed by having a larger electric current flow than the electric current flowing in conventional EL elements. A converter and driver transistor ( | 09-12-2013 |
20130257843 | Light Emitting Device and Electronic Device - A TFT for controlling the amount of current flowing into a power supply line when an EL element does not emit light (electric discharge TFT) is provided in each pixel. When an EL driving TFT is turned ON to make an EL element emit light, the electric discharge TFT is turned OFF. On the other hand, the electric discharge TFT is turned ON when the EL driving TFT is turned OFF and no EL element emit light. Therefore variation of the difference in electric potential over the length of a power supply line depending on an image to be displayed is contained. Thus reduced is the difference in amount of current flowing into EL elements in adjacent pixels while the EL elements emit light, thereby avoiding crosstalk. | 10-03-2013 |
20130299836 | ILLUMINATION APPARATUS - A point light source is converted into a plane light source having a satisfactory uniformity. The point light source is converted into a line light source by means of a linear light guiding plate, and further into the plane light source by means of a plane-like light guiding plate. Light from the point light source is reflected at a lamp reflector to be incident on at least two side surfaces of the plane-like light guiding plate. | 11-14-2013 |
20130342743 | DRIVING METHOD OF A SEMICONDUCTOR DEVICE - A horizontal scanning period is divided into n parts (n is a natural number), so that horizontal scanning can be performed (n×y) times in one frame period. That is, n signals can be outputted from each pixel, and storage times of the n signals are different from one another. Then, since a signal suited to the intensity of light irradiated to each pixel can be selected, information of an object can be accurately read. | 12-26-2013 |
20140015738 | Light Emitting Device, Method of Driving a Light Emitting Device, Element Substrate, and Electronic Equipment - A display device capable of obtaining a constant luminance without being influenced by temperature change is provided as well as a method of driving the display device. A current mirror circuit composed of a first transistor and a second transistor is provided in each pixel. The first transistor and second transistor of the current mirror circuit are connected such that their drain currents are kept almost equal irrespective of the level of load resistance. By controlling the OLED drive current using the current mirror circuit, a change in OLED drive current due to fluctuation in characteristics between transistors is avoided and a constant luminance is obtained without being influenced by temperature change. | 01-16-2014 |
20140048811 | SEMICONDUCTOR DEVICE - Solved is a problem of attenuation of output amplitude due to a threshold value of a TFT when manufacturing a circuit with TFTs of a single polarity. In a capacitor ( | 02-20-2014 |
20140183540 | Display Device - There is provided an active matrix EL display device that can display a clear multi gray-scale color display to reduce the shift in the potential caused by the potential drop due to the wiring resistance of a power source supply line, in order to decrease the unevenness in a display region. A plurality of drawing out ports of the power source supply line are arranged. Further, in the wiring resistance between the external input terminal and the pixel portion power source supply line, potential compensation is performed by supplying potential to the power source supply line by a feedback amplifier. Further, in addition to above structure, the power source supply line may be arranged in a matrix. | 07-03-2014 |
20140209881 | Self-Light Emitting Device and Electrical Appliance Using the Same - A self-light emitting device and an electrical appliance including the same are provided, in which extracting efficiency of light from a light emitting element, especially in an EL element, can be improved. A light scattering body formed by etching a transparent film is provided on an insulator so that the extracting efficiency of light can be improved, and the self-light emitting device with high efficiency of light emission can be provided. | 07-31-2014 |
20140217287 | Semiconductor Device and Method of Driving the Same - To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed. | 08-07-2014 |