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1
US20050194912A1
Publication/Patent Number: US20050194912A1
Publication date: 2005-09-08
Application number: 11/057,723
Filing date: 2005-02-15
Abstract: Provided is a manufacturing method capable of manufacturing an electron-emitting device in which a variation in device current at the time of manufacturing is suppressed and thus uniformity thereof is high. The electron-emitting device includes a substrate, a first conductor, and a second conductor. The substrate is composed of: a member which contains silicon oxide as a main ingredient, Na2O, and K2O and in which a molar ratio of K2O to Na2O is 0.5 to 2.0; and a film which contains silicon oxide as a main component and is stacked on the member. The first conductor and the second conductor are located on the substrate. In a forming step and/or an activation step, a quiescent period (interval) of a pulse voltage applying repeatedly applied between the first conductor and the second conductor is set equal to or longer than 10 msec. Provided is a manufacturing method capable of manufacturing an electron-emitting device in which a variation in device current at the time of manufacturing is suppressed and thus uniformity thereof is high. The electron-emitting device includes a substrate, a first conductor ...more ...less
2
US20050184675A1
Publication/Patent Number: US20050184675A1
Publication date: 2005-08-25
Application number: 11/049,903
Filing date: 2005-02-04
Abstract: A field emission RF amplifier. The field emission RF amplifier includes one or more RF amplification units on a substrate and held in a vacuum state and facing a reflection electrode. The RF amplification unit includes a cathode electrode, gate electrode, and an anode electrode all formed on the same substrate. The cathode electrode has a CNT emitter. A DC voltages are applied to the cathode and anode electrodes. An RF signal is input at the cathode electrode and is amplified and output at the anode electrode. Capacitors and inductors are arranged to filter out AC and DC components where needed. An improved amplification of RF signals with high electron mobility and good impedance matching abilities result. A field emission RF amplifier. The field emission RF amplifier includes one or more RF amplification units on a substrate and held in a vacuum state and facing a reflection electrode. The RF amplification unit includes a cathode electrode, gate electrode, and an anode electrode ...more ...less
3
US20050258773A1
Publication/Patent Number: US20050258773A1
Publication date: 2005-11-24
Application number: 10/849,395
Filing date: 2004-05-19
Abstract: An inverter is coupled to an EL lamp by a high pass filter including a series capacitor and a shunt resistor. The resistor is coupled in parallel with the EL lamp. The high pass filter has a time constant greater than 0.005 seconds and the capacitor has a capacitance at least ten times the capacitance of the EL lamp. An inverter is coupled to an EL lamp by a high pass filter including a series capacitor and a shunt resistor. The resistor is coupled in parallel with the EL lamp. The high pass filter has a time constant greater than 0.005 seconds and the capacitor has a capacitance at least ...more ...less
4
US20050258776A1
Publication/Patent Number: US20050258776A1
Publication date: 2005-11-24
Application number: 11/131,208
Filing date: 2005-05-18
Inventor: Moon, Seong  
Assignee: Moon, Seong
Abstract: A plasma display apparatus and a method of driving the same are disclosed. The plasma display apparatus includes a plasma display panel and a scan driving part and a sustain driving part each including an energy recovery circuit having a first energy storage part and a second energy storage part such that discharge is generated a plurality of times by one sustain pulse when sustain pulses are supplied to the plasma display panel. A plasma display apparatus and a method of driving the same are disclosed. The plasma display apparatus includes a plasma display panel and a scan driving part and a sustain driving part each including an energy recovery circuit having a first energy storage part and a second ...more ...less
5
US20050237001A1
Publication/Patent Number: US20050237001A1
Publication date: 2005-10-27
Application number: 11/114,122
Filing date: 2005-04-26
Inventor: Hayafuji, Akinori  
Abstract: A clock signal synchronized with a data write signal for each scan line supplied from a light emission control circuit 4 to a scan driver 6 is supplied to an oscillator 12 generating a reference switching signal of a DC-DC converter 8 by a PWM method via a frequency divider 14. Thus, even when a ripple component by a switching operation of the converter has been superimposed on a drive voltage Va, constantly the same gate-to-source voltage Vgs is supplied to a light emission drive transistor Tr2 for each scan line, whereby a problem that a state in which light emission intensities differ for each scan line is brought about can be resolved. Further, the duty ratio of a switching signal from a PWM circuit 11 is detected by a detection circuit 13 to grasp the load condition of the converter, and when the load is light, the division ratio of the frequency divider 14 is increased to execute the switching operation at a low frequency. In this manner, the cycle (boost cycle) of the switching operation in the converter is made greater, so that a useless power loss by the switching operation in the converter can be reduced, whereby the power utilization rate of a light load time can be improved. A clock signal synchronized with a data write signal for each scan line supplied from a light emission control circuit 4 to a scan driver 6 is supplied to an oscillator 12 generating a reference switching signal of a DC-DC converter 8 by a PWM method via a frequency divider 14 ...more ...less
6
US20050225251A1
Publication/Patent Number: US20050225251A1
Publication date: 2005-10-13
Application number: 10/998,404
Filing date: 2004-11-29
Inventor: Hsueh, Wei-chieh  
Abstract: A pixel structure and its driving method, which are used in the active matrix organic illuminated displays, are described. The pixel structure has four transistors, a capacitor and three signal lines. The first and second transistors are used as the switching transistors and controlled by the first and second scan lines, respectively. The third and fourth transistors together constitute a current mirror to equalize the current flows through the OLED in each pixel and the writing in current in the data line. Therefore, the illumination of the OLED between each pixel will be more uniform and is not influenced by the threshold voltage. A pixel structure and its driving method, which are used in the active matrix organic illuminated displays, are described. The pixel structure has four transistors, a capacitor and three signal lines. The first and second transistors are used as the switching transistors and ...more ...less
7
US20050264226A1
Publication/Patent Number: US20050264226A1
Publication date: 2005-12-01
Application number: 11/139,628
Filing date: 2005-05-31
Abstract: Provided is a method for driving an electron emission device that reduces the required withstand voltage of an integrated circuit constituting a scan driver, which reduces both the manufacturing costs of an electron emission device and the likelihood of noise in the scan driver, as well as preventing back emission. Scan signals are applied to scan electrode lines during a scan period and an offset period, which is a non-scan period. Display data signals are applied to data electrode lines during a first data period, when a difference between a voltage of the display data signal and a voltage of the scan signal is greater than or equal to an emission start voltage; and during a second data period, when the voltage difference is less than the emission start voltage. Provided is a method for driving an electron emission device that reduces the required withstand voltage of an integrated circuit constituting a scan driver, which reduces both the manufacturing costs of an electron emission device and the likelihood of noise in the scan driver ...more ...less
8
US20050264227A1
Publication/Patent Number: US20050264227A1
Publication date: 2005-12-01
Application number: 11/135,072
Filing date: 2005-05-23
Inventor: Tateuchi, Mitsuru  
Abstract: Disclosed herein is a controlling apparatus for controlling an inputting and outputting apparatus of the active matrix driving type including pixels each having an electroluminescence element whose operation can be changed over between light emitting operation and light receiving operation in response to a voltage applied thereto, including: a removing section for removing, when the light receiving operation is to be performed by the electroluminescence element included in a predetermined pixel, charge accumulated in a parasitic capacitance upon the light emitting operation performed immediately before the light receiving operation by the electroluminescence element; and a detection section for detecting light inputted from the outside to the inputting and outputting apparatus based on an output from the predetermined pixel including the electroluminescence element whose charge has been removed from the parasitic capacitance thereof by the removing section. Disclosed herein is a controlling apparatus for controlling an inputting and outputting apparatus of the active matrix driving type including pixels each having an electroluminescence element whose operation can be changed over between light emitting operation and light ...more ...less
9
US20050264228A1
Publication/Patent Number: US20050264228A1
Publication date: 2005-12-01
Application number: 11/135,387
Filing date: 2005-05-24
Inventor: Kim, Keum-nam  
Assignee: Kim, Keum-Nam
Abstract: There is provided an organic EL display panel having a pixel circuit that increases the panel's aperture ratio by an improved structure of a unit pixel. The present invention discloses an organic EL display panel including at least one pixel circuit for driving each pixel, wherein the pixel circuit comprises at least one organic light emitting element, at least two thin film transistors and at least one capacitor per pixel. The thin film transistors respectively comprise a gate electrode and a semiconductor layer in which a channel region, a source region and a drain region are formed. The conductive layer contacted on the gate electrode of one of the thin film transistors is coupled to another thin film transistor and at least one capacitor. There is provided an organic EL display panel having a pixel circuit that increases the panel's aperture ratio by an improved structure of a unit pixel. The present invention discloses an organic EL display panel including at least one pixel circuit for driving each pixel ...more ...less
10
US20050264230A1
Publication/Patent Number: US20050264230A1
Publication date: 2005-12-01
Application number: 11/022,949
Filing date: 2004-12-28
Abstract: Provided are a method and apparatus for driving a PDP for widening a driving margin and improving contrast. The method for driving a PDP includes a first step of forming wall charges in cells with a set-up discharge using a set-up signal in a first sub-field and erasing the wall charges with a set-down discharge using a first set-down signal to initialize the cells, and a second step of erasing the wall charges with a set-down discharge generated using a second set-down signal different from the first set-down signal in a second sub-field, to initialize the cells. The method and apparatus for driving a PDP uniformly initialize sub-fields to widen the driving margin of PDP and remove a set-up discharge in at least one sub-field to improve the contrast of PDP. Provided are a method and apparatus for driving a PDP for widening a driving margin and improving contrast. The method for driving a PDP includes a first step of forming wall charges in cells with a set-up discharge using a set-up signal in a first sub-field and erasing the wall ...more ...less
11
US20050264231A1
Publication/Patent Number: US20050264231A1
Publication date: 2005-12-01
Application number: 11/039,576
Filing date: 2005-01-19
Abstract: A light generating device includes a body having discharge spaces generating light in response to a voltage signal, and electrodes providing the voltage signal to the discharge spaces. The discharge spaces are apart from each other and arranged substantially parallel with each other. The electrodes are disposed at external portions of the body. The body includes a first substrate, and a second substrate disposed on the first substrate. The second substrate includes space forming members and space dividing members. The discharge spaces are each formed between corresponding one of the space forming members and the first substrate. The space dividing members are each disposed between the adjacent space forming members. The space dividing members include connecting passages each connecting adjacent ones of the discharge spaces. A display device includes a display panel for displaying images using an image signal, a driving signal and light, the planar light generating device for providing the light to the display panel, and an inverter for generating the voltage signal to the planar light generating device. A light generating device includes a body having discharge spaces generating light in response to a voltage signal, and electrodes providing the voltage signal to the discharge spaces. The discharge spaces are apart from each other and arranged substantially parallel with each ...more ...less
12
US20050264235A1
Publication/Patent Number: US20050264235A1
Publication date: 2005-12-01
Application number: 11/140,014
Filing date: 2005-05-26
Inventor: Ito, Kazuhiro  
Assignee: Ito, Kazuhiro
Abstract: A plasma display apparatus minimizing the occupying area of the driving boards in the chassis base by using an integrated driving board capable of driving scan electrodes sustain electrodes. A plasma display panel includes: a plurality of first electrodes (sustain electrodes or X electrodes), a plurality of second electrodes (scan electrodes or Y electrodes), a plurality of third electrodes (address electrodes) extending in a direction crossing the plurality of the first and the second electrodes, and a chassis base to which the plasma display panel is fixed. Driving boards are attached on a second side of the chassis base, the driving boards generating a driving voltage and applying the driving voltage to the electrodes. The first electrodes are grounded to the chassis base. A plasma display apparatus minimizing the occupying area of the driving boards in the chassis base by using an integrated driving board capable of driving scan electrodes sustain electrodes. A plasma display panel includes: a plurality of first electrodes (sustain electrodes or ...more ...less
13
US20050151480A1
Publication/Patent Number: US20050151480A1
Publication date: 2005-07-14
Application number: 10/503,668
Filing date: 2003-09-19
Abstract: An image display device includes at least one transmissive display panel arranged at different depth positions in a direction normal to a display surface of the image display device. Each of the transmissive display panels includes a light-emitting layer that is sandwiched between a front side transmissive film and a rear side transmissive film. The rear side transmissive film has an interface with a maximum refractive index difference that causes an efficiency of light emitted from the light-emitting layer to become smaller than a front side light emission efficiency in the characteristics of light-emission efficiency, which changes with respect to a film thickness of the transmissive film due to optical interference. An image display device includes at least one transmissive display panel arranged at different depth positions in a direction normal to a display surface of the image display device. Each of the transmissive display panels includes a light-emitting layer that is sandwiched ...more ...less
14
US20050212445A1
Publication/Patent Number: US20050212445A1
Publication date: 2005-09-29
Application number: 11/024,650
Filing date: 2004-12-30
Inventor: Lee, Han  
Abstract: An electro-luminescence display device includes an electro-luminescence panel having a plurality of pixels at pixel areas defined by intersections between data lines and first and second gate lines, each of the pixels including: an electro-luminescence cell connected to receive a supply voltage, and a first cell driver and a second cell driver for alternately controlling a current flow into the electro-luminescence cell. An electro-luminescence display device includes an electro-luminescence panel having a plurality of pixels at pixel areas defined by intersections between data lines and first and second gate lines, each of the pixels including: an electro-luminescence cell connected to receive ...more ...less
15
US20050280373A1
Publication/Patent Number: US20050280373A1
Publication date: 2005-12-22
Application number: 11/111,286
Filing date: 2005-04-21
Inventor: Chang, Yi-cheng  
Abstract: Organic light emitting diode (OLED) displays and fabrication methods thereof are provided. The OLED display comprises a substrate having a display area and a peripheral area. An array of pixels is disposed in the display area. Column and row control circuits are disposed in the peripheral area. At least one thermal dissipation element is disposed in the peripheral area connecting each pixel. Organic light emitting diode (OLED) displays and fabrication methods thereof are provided. The OLED display comprises a substrate having a display area and a peripheral area. An array of pixels is disposed in the display area. Column and row control circuits are disposed in the ...more ...less
16
US20050285541A1
Publication/Patent Number: US20050285541A1
Publication date: 2005-12-29
Application number: 10/875,489
Filing date: 2004-06-23
Inventor: Lechevalier, Robert  
Abstract: RF field is sensed to produce an incoming voltage that drives a microarray of electron guns in a sweep pattern towards a detector array. The electron guns emit a beam current that may amplify the incoming voltage signal, and the detector material may be selected to amplify the beam current at the detector, for example, by avalanche and/or cascade in a Schottky material, to provide a low current, high gain amplification. The microarrays may be arranged in various combinations to produce successive amplifications, frequency multipliers, transmit-receive amplifiers, crossbar switches, mixers, beamformers, and selective polarization devices, among other such devices. RF field is sensed to produce an incoming voltage that drives a microarray of electron guns in a sweep pattern towards a detector array. The electron guns emit a beam current that may amplify the incoming voltage signal, and the detector material may be selected to amplify the ...more ...less