Field Emissive (e.g., Fed, Spindt, Microtip, Etc.) Patents (Class 345/75.2)
  • Publication number: 20020126072
    Abstract: The invention concerns a flat thermionic emission screen (1) comprising a first substrate (2) on which are arranged an emission cathode (4) and an electron extraction grid (8), a second substrate (12) facing the first substrate (2) on which is arranged an anode (14) designed to collect the electrons emitted by the cathode (4), and an electronic control circuit of the anode (14) voltage comprising at least one commutation component (18, 20).
    Type: Application
    Filed: February 19, 2002
    Publication date: September 12, 2002
    Inventor: Pierre Nicolas
  • Publication number: 20020122018
    Abstract: The present application discloses a characteristic adjusting method of executing a step of changing the characteristics of display devices in an image display apparatus. In particular, the present invention discloses a configuration in which target values for changes in characteristics are obtained by reducing the high-frequency components of the spatial distribution of the characteristics of the display devices.
    Type: Application
    Filed: February 8, 2002
    Publication date: September 5, 2002
    Inventors: Makoto Kanda, Takahiro Oguchi, Akihiko Yamano
  • Patent number: 6445367
    Abstract: A method and apparatus for driving an electron source in which a high-quality image display is presented by correcting a non-uniform effective current distribution caused in cold cathode elements by leakage current. A digital video signal enters a shift register where a serial-to-parallel conversion is made for each line of an image based upon a shift clock signal. One line of the image data that has been subjected to the serial-to-parallel conversion is latched in a latch circuit and then applied to a voltage modulating circuit. The latter voltage-modulates the input data and sends the modulated signal to a voltage/current converting circuit. The latter converts the voltage quantity to a current quantity, which is applied to each of the cold cathode elements of a display panel through respective column terminals. A voltage V1 is applied to the selected row wire, and a voltage V2 (V2≠V1) is applied to all other row wires, for controlling the leakage current.
    Type: Grant
    Filed: June 12, 1995
    Date of Patent: September 3, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Noritake Suzuki, Hidetoshi Suzuki, Kunihiro Sakai, Takahiro Oguchi
  • Publication number: 20020089473
    Abstract: For decreasing hardware for correction to compensate for decrease of luminance due to decrease in drive voltage of devices, a plurality of electron-emitting devices are arranged in a matrix pattern and wired by a plurality of row and column lines, a column wiring driving unit applies voltage pulses to the column lines, and row wiring driving units apply voltages to the row lines to switch a row to be selected. The image signal processing unit divides a luminance level of an image signal into plural areas in the signal amplitude direction in response to each split timing signal. There are provided means for detecting frequencies of luminance signals included in the respective amplitude areas, a correction quantity calculating unit for outputting correction signals based on the detected values, and an adding unit for adding the correction signals and luminance signals, which outputs results of addition as electron emission requirements to the column wiring driving unit.
    Type: Application
    Filed: November 19, 2001
    Publication date: July 11, 2002
    Inventors: Tatsuro Yamazaki, Makiko Mori, Osamu Sagano
  • Patent number: 6417627
    Abstract: A matrix-addressable device includes a number of metal column lines having a number of windows underlying locations of intersection where a number of metal row lines overlap or cross the column lines. Each of the windows has a length that is greater than the nominal width of the row line crossing the column line. A layer of a doped semiconductor overlaps each of the windows to electrically couple a number of emitters formed on the doped semiconductor to the column lines. Each of the metal row lines may include a number of windows positioned at the locations where the row and column lines overlap. Each of the windows has a length greater than a nominal width of the column line that the window overlays. A doped semiconductor layer covers each of the windows and is electrically coupled thereto. A number of apertures formed in the doped semiconductor layer aligned with the emitters to form an extraction grid. A layer of dielectric material may separate the column lines from the row lines.
    Type: Grant
    Filed: February 3, 1999
    Date of Patent: July 9, 2002
    Assignee: Micron Technology, Inc.
    Inventor: Ammar Derraa
  • Publication number: 20020080099
    Abstract: A high-resolution field emission display that applies a field emission device(or a field emission array) being an electron source element to a flat panel display device. The field emission display includes an upper plate and a lower plate that fac each other, wherein the lower plate and the upper plate are vacuum-packaged in parallel positions. A dot pixel of the lower plate includes a high-voltage amorphous silicon thin film transistor formed on the glass substrate of the lower plate, a diode type field emission film partially formed on the drain of the high-voltage amorphous silicon TFT, a passivation insulation layer formed on the high-voltage amorphous silicon TFT and the lateral side of the diode type field emission film, and an electron beam focusing electrode/light-shading film which vertically overlaps with the high-voltage amorphous silicon TFT on some parts of the passivation insulation layer and is formed on a lateral side of the diode type field emission film.
    Type: Application
    Filed: May 31, 2001
    Publication date: June 27, 2002
    Inventors: Yoon-Ho Song, Young-Rae Cho, Seung-Youl Kang, Moon-Youn Jung, Chi-Sun Hwang, Jin-Ho Lee, Kyoung-Ik Cho
  • Patent number: 6411269
    Abstract: An apparatus is provided for modulating a conductive element in an FED device from a first level to a second level in which the charge on the display is conserved. In one embodiment, the apparatus has a primary modulator having a first input connected to a first signal representative of the second level, an output connected to the conductive element, and a second input connected to a first signal representative of the output; and a connector of a modifying voltage to the output, the connector having a first input connected to a second signal representative of the second level and a second input connected to a second signal responsive to the output.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: June 25, 2002
    Assignee: Micron Technology, Inc.
    Inventor: David A. Zimlich
  • Publication number: 20020060653
    Abstract: A light emission display drive apparatus used as a light emission display drive circuit includes an at least second-order &Dgr;&Sgr; modulator 3 for turning on/off a constant drive current or a constant drive voltage, thereby performing gradation control of each light emitting element. A pixel read section 2 reads the brightness value of each light emitting element in a predetermined period, the &Dgr;&Sgr; modulator 3 performs &Dgr;&Sgr; modulation in a predetermined period in response to the read brightness value, and an output change section 36 of the &Dgr;&Sgr; modulator performs operations of detecting unevenness of a list of output pulses of the &Dgr;&Sgr; modulation and dispersing the output pulses in the same light emitting element among light emitting elements, thereby performing multiple-step gradation control of the light emitting element.
    Type: Application
    Filed: November 20, 2001
    Publication date: May 23, 2002
    Applicant: PIONEER CORPORATION
    Inventor: Yoshiyuki Okuda
  • Patent number: 6392618
    Abstract: It is an object to provide an active matrix device which permits enlargement of the area and high-speed response and which serves in place of a semiconductor switch. An active matrix device 35 incorporating scanning-signal electrodes 25 and data-signal electrodes 16 disposed in a matrix configuration and structured such that at least one matrix operating means and a light function device which is operated by the matrix operating means are disposed at intersections of the scanning-signal electrodes 25 and the data-signal electrodes 16, wherein the matrix operating means is mechanically-conductive switch 33 which is operated by static electric force. The mechanically-conductive switch 33 incorporates a thin flexible film 23 which is deflected by static electric stress, a conductive film 29 formed on the thin flexible film 23, a data-signal electrode 16 and a pixel electrode 27a of the light function device.
    Type: Grant
    Filed: July 16, 1999
    Date of Patent: May 21, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Koichi Kimura
  • Publication number: 20020057232
    Abstract: The invention relates to a display device (1) having pixel elements comprising a luminescent material (7) for emitting light when excited by, e.g. electromagnetic radiation. The pixel elements are provided with electrodes (5,9) which modulate an emission of light by the luminescent material (7) by applying an electric field.
    Type: Application
    Filed: November 2, 2001
    Publication date: May 16, 2002
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N. V.
    Inventor: Coen Theodorus Hubertus Fransiscus Liedenbaum
  • Patent number: 6380914
    Abstract: A method for improving life of a field emission display (100), which has a plurality of electron emitters (118) and an anode (124), includes the steps of causing plurality of electron emitters (118) to emit electrons, applying a first anode voltage to anode (124), thereafter applying a second anode voltage to anode (124), and thereafter applying a third anode voltage to anode (124). The first anode voltage and the second anode voltage are selected to cause electrons emitted by plurality of electron emitters (118) to be attracted toward anode (124). The third anode voltage is selected to cause electrons emitted by plurality of electron emitters (118) to not be attracted toward anode (124). Furthermore, the second anode voltage is selected to be less than the first anode voltage.
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: April 30, 2002
    Assignee: Motorola, Inc.
    Inventor: Chenggang Xie
  • Patent number: 6380913
    Abstract: A flat panel display, such as a Field Emission Display (“FED”), is disclosed having a current control circuit. Input into the display, initially, is an analog signal having an amplitude. In one embodiment, the current control circuit includes a converter for converting the analog input signal to a sawtooth signal having a height and width. Then, the level of the sawtooth signal is compared to a voltage level to establish a pulse width of an emitter current. The emitter current is thus controlled by a pulse width modulation approach. In another embodiment, the current control circuit traps a column voltage on a parasitic capacitance. The trapped voltage then controls the gate of a transistor to control current flow from the emitter set to ground.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: April 30, 2002
    Assignee: Micron Technology Inc.
    Inventors: Glen E. Hush, Tyler A. Lowrey
  • Patent number: 6377231
    Abstract: An image display device incorporating a quick-action electron source is disclosed. After the power source of the device is turned on, drive signals are outputted from an RGB output circuit to each of the RGB electron sources after it is detected that sufficient deflection current is flowing from horizontal/vertical deflection circuit to the deflection yoke to enable the electron beam to adequately scan the screen.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: April 23, 2002
    Assignee: NEC Corporation
    Inventors: Nobuya Seko, Yoshinori Tomihari
  • Patent number: 6369783
    Abstract: The present invention generates a cell driving apparatus of a field emission display capable of increasing a grey level and minimizing an area problem by designing a current mode DAC which contains low voltage devices.
    Type: Grant
    Filed: May 11, 1999
    Date of Patent: April 9, 2002
    Assignee: Orion Electric Co., Ltd.
    Inventors: Oh Kyong Kwon, Young Sun Na
  • Patent number: 6369784
    Abstract: A field emission display having an improved operational life. In one embodiment of the present invention, the field emission display comprises a plurality of row lines, a plurality of column lines, and a plurality of electron emissive elements disposed at intersections of the plurality of row lines and column lines, a column driver circuit, and a row driver circuit. The column driver circuit is coupled to drive column voltage signals over the plurality of column lines; and, the row driver circuit is coupled to activate and deactivate the plurality of row lines with row voltage signals. Significantly, according to the present invention, operational life of the field emission display is substantially extended when the electron emissive elements are intermittently reverse-biased by the column voltage signals and the row voltage signals. In another embodiment, the row driver circuit is responsive to a SLEEP signal.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: April 9, 2002
    Assignee: Candescent Intellectual Property Services, Inc.
    Inventors: Igor L. Maslennikov, Dennis M. Urbon, Christopher J. Spindt, Ronald L. Hansen, Christopher J. Curtin
  • Patent number: 6364730
    Abstract: A method for operating a field emission device (100) having an electron emitter (115) includes the steps of providing an emitter-enhancing electrode (117) proximate to electron emitter (115), causing emitter-enhancing electrode (117) to emit electrons, and causing the electrons emitted by emitter-enhancing electrode (117) to be received by electron emitter (115). A method for fabricating a field emission device (100) includes the steps of forming a layer (126) of dielectric material, forming emitter-enhancing electrode (117) on layer (126) of dielectric material, forming an enhanced-emission structure (131) in emitter-enhancing electrode (117), removing a portion of layer (126) of dielectric material proximate to enhanced-emission structure (131) to form a well (114, 158), and forming electron emitter (115) within well (114, 158).
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: April 2, 2002
    Assignee: Motorola, Inc.
    Inventors: James E. Jaskie, Albert Alec Talin, Paul VonAllmen, Bernard F. Coll, Kathleen Anne Tobin
  • Patent number: 6366265
    Abstract: An image-forming device having, in an envelope, an electron-emitting element, an image-forming member for forming an image by irradiation of an electron beam emitted from the electron-emitting element, and an electroconductive supporting member for supporting the envelope. The potential of the supporting member is controlled to not be higher than the maximum potential applied to the electron-emitting element. The electron-emitting element and the image-forming member can be placed in juxtaposition on the same substrate, an electroconductive substrate can be additionally provided in opposition to the face of the substrate, and the supporting member can be connected electrically to one of the electrodes and also to the electroconductive substrate.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: April 2, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ichiro Nomura, Hidetoshi Suzuki, Tetsuya Kaneko, Shinya Mishina, Naoto Nakamura
  • Patent number: 6366266
    Abstract: A method and apparatus for programmable field emission display comprising an array of cathodoluminescent elements. Each cathodoluminescent element in the array is responsive to separate select signals to cause light to be emitted from said display at a location in the array corresponding to each separate cathodoluminescent element. In one embodiment, to account for processing variation and the like, each cathodoluminescent element is provided with a programmable element for adjusting the operating level of the associated cathodoluminescent element in response to select signals of predetermined voltage levels. Each programmable element includes a charge storage device and is initially programmed by storing a level of electric charge thereon such that uniformity of operation among the plurality of cathodoluminescent elements in the array is improved. In one embodiment the programmable element comprises a floating gate transistor.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: April 2, 2002
    Assignee: Micron Technology, Inc.
    Inventors: Tianhong Zhang, Zhongi Xia
  • Patent number: 6359604
    Abstract: A current controlled field emission display includes a controller that provides a pair of pulsed clocking signals that allows current to flow from ground potential to an emitter in the field emission display during each clocking signal pulse. The number of electrons, and thus the intensity of the light will depend upon the number N of clocking signal pulses during an activation interval. In one embodiment, each of the pulsed signals includes a number N of pulses that corresponds to a desired intensity of pixels. The pulsed signals are formed by gating a clock signal in response to digital data applied to the display such that the transfer of electrons is controlled directly by the digital data. In another embodiment, the pulsed signals are produced by comparing a decoded image signal to counts from a high speed counter.
    Type: Grant
    Filed: August 20, 1998
    Date of Patent: March 19, 2002
    Assignee: Micron Technology, Inc.
    Inventor: David A. Zimlich
  • Publication number: 20020030646
    Abstract: In the field emission display device in which an electric field emission device is applied to a flat panel display device, an upper plate and a lower plate are vacuum-packaged in parallel, and the lower plate is constructed by row and column signal buses made of metal capable of performing a matrix addressing and by pixels defined by the row and column signal buses, and each pixel is constructed by a film type field emitter, a control device for controlling the film type field emitter and an addressing device for transferring scan and data signals of a display to the control device. Further, the control device is composed of a switching device for directly controlling field emission current of the film type field emitter and a memory device for maintaining the data signal of the display, and the upper plate is made up of anode electrode for accelerating, as high energy, electron emitted from the field emitter, against the field emitter, and a phosphor for performing a cathode luminescence.
    Type: Application
    Filed: December 8, 2000
    Publication date: March 14, 2002
    Inventors: Yoon-Ho Song, Moon-Youn Jung, Seung-Youl Kang, Jin-Ho Lee, Kyoung-Ik Cho
  • Patent number: 6356250
    Abstract: A field emission display includes electrostatic discharge protection circuits coupled to an emitter substrate and an extraction grid. In the preferred embodiment, the electrostatic discharge circuit includes diodes reverse biased between grid sections and a first reference potential or between row lines and a second reference potential. The diodes provide a current path to discharge static voltage and thereby prevent a high voltage differential from being maintained between the emitter sets and the extraction grids. The diodes thereby prevent the emitter sets from emitting electrons at a high rate that may damage or destroy the emitter sets. In one embodiment, the diodes are coupled directly between the grid sections and the row lines. In one embodiment, the diodes are formed in an insulative layer carrying the grid sections. In another embodiment, the diodes are integrated into the emitter substrate.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: March 12, 2002
    Assignee: Micron Technology, Inc.
    Inventors: David A. Cathey, Glen E. Hush, Manny K. F. Ma, Craig M. Dunham, David A. Zimlich
  • Patent number: 6351254
    Abstract: A junction-based field emission display, wherein the junctions are formed by depositing a semiconducting or dielectric, low work function, negative electron affinity (NEA) silicon-based compound film (SBCF) onto a metal or n-type semiconductor substrate. The SBCF can be doped to become a p-type semiconductor. A small forward bias voltage is applied across the junction so that electron transport is from the substrate into the SBCF region. Upon entering into this NEA region, many electrons are released into the vacuum level above the SBCF surface and accelerated toward a positively biased phosphor screen anode, hence lighting up the phosphor screen for display. To turn off, simply switch off the applied potential across the SBCF/substrate. May be used for field emission flat panel displays.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: February 26, 2002
    Assignee: The Regents of the University of California
    Inventors: Long N. Dinh, Mehdi Balooch, William McLean, II, Marcus A. Schildbach
  • Publication number: 20020011973
    Abstract: In a display device including, for each pixel, an organic EL element (60) and TFTs (30, 40) for controlling the element, a sequential circuit (350) is provided for stopping supply of power source voltages Vvdd and Hvdd to drivers (80, 90) for driving the TFTs (30, 40) which control each organic EL element (60) after stopping supply of power source voltage Pvdd to the organic EL element (60) when the device is turned off.
    Type: Application
    Filed: March 28, 2001
    Publication date: January 31, 2002
    Inventor: Naoaki Komiya
  • Patent number: 6342875
    Abstract: An image-forming apparatus includes an image-forming device in an envelope. The image-forming device includes a member (e.g. thin film electrode) which is carried on the inner surface of the envelope and is adapted to application of electron-accelerating voltage Va. The member-carrying part, such as a transparent face plate) of the envelope also includes on its outer surface a structure for applying a voltage substantially equal to the voltage Va (e.g. electroconductive layer connected to the thin-film electrode by way of a certain resistance). The electric field across the part is significantly reduced to thereby prevent migration of sodium ions contained in the part, which can be made of soda lime glass.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: January 29, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasuyuki Todokoro
  • Patent number: 6340962
    Abstract: A plane type display device having a plurality of electric field emitting type cathodes (K), a high-tension electrode which fixedly gives on a surface of the plurality of cathodes (K) a strong electric field forming a Schottky barrier capable of making possible electron emission from the plurality of cathodes (K), a two-dimensional MOS gate array which is connected to the plurality of cathodes (K) and controls presence or absence of the electron emission from the plurality of cathodes (K) and a fluorescent substance layer (P) made to brighten by bombarding of the electrons selectively emitted from among the plurality of cathodes (K), whereby in a plane type displaying apparatus comprising a plurality of electric field emitting type cathodes and a fluorescent substance layer made to brighten by bombarding of electrons emitted from a cathode selected out of the plurality of electric field emitting type cathodes, a plane type displaying apparatus which is capable of making lower a driving voltage for having the
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: January 22, 2002
    Assignee: Sony Corporation
    Inventor: Morikazu Konishi
  • Publication number: 20010052884
    Abstract: A current controlled field emission display includes a controller that provides a pair of pulsed clocking signals that allows current to flow from ground potential to an emitter in the field emission display during each clocking signal pulse. The number of electrons, and thus the intensity of the light will depend upon the number N of clocking signal pulses during an activation interval. In one embodiment, each of the pulsed signals includes a number N of pulses that corresponds to a desired intensity of pixels. The pulsed signals are formed by gating a clock signal in response to digital data applied to the display such that the transfer of electrons is controlled directly by the digital data. In another embodiment, the pulsed signals are produced by comparing a decoded image signal to counts from a high speed counter.
    Type: Application
    Filed: August 8, 2001
    Publication date: December 20, 2001
    Applicant: MICRON TECHNOLOGY, INC.
    Inventor: David A. Zimlich
  • Patent number: 6323831
    Abstract: An electron emitting comprising an emitter electrode for emitting electrons when applied with an electric field, a gate electrode for extracting the electrons emitted from the emitter electrode, when applied with a voltage from a signal source, the voltage being positive with respect to the emitter electrode, an anode electrode connected to a load, for collecting the electrons extracted by the gate electrode, and for passing an anode current, and a gate resistor connected between the signal source and the gate electrode, for reducing a gate current flowing in the gate electrode, without changing an anode current flowing in the anode, and for lowering a gate voltage by utilizing a voltage drop cause by the gate current.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: November 27, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomio Ono, Tadashi Sakai, Naoshi Sakuma, Kazuya Nakayama
  • Publication number: 20010043172
    Abstract: A method for forming images on a display having a matrix of rows and columns of pixels is provided. Such method comprises the steps of: successively addressing the rows of pixels, each one of the rows of pixels being addressed for a predetermined addressing period of time. During each predetermined addressing period of time, a voltage level is applied to each one of the columns of pixels for a time duration in accordance with image intensity data and changing to a different voltage level during the remaining period of the addressing period of time. The voltage level changes only once during each predetermined addressing period of time. The anode of the display is coupled to a power supply adapted to couple either a relatively high voltage to the anode when such display is to operate in a relatively bright environment or a relatively low voltage when such display is to operate with relatively dim environment. The images are characterized by a gray scale level at each one of the pixels.
    Type: Application
    Filed: March 22, 2001
    Publication date: November 22, 2001
    Inventors: James M. McGrath, Alan Palevsky, Clifford Johnson, Gregory E. Gott, Helmut Lelke
  • Publication number: 20010040540
    Abstract: An image display device incorporating a quick-action electron source is disclosed. After the power source of the device is turned on, drive signals are outputted from an RGB output circuit to each of the RGB electron sources after it is detected that sufficient deflection current is flowing from horizontal/vertical deflection circuit to the deflection yoke to enable the electron beam to adequately scan the screen.
    Type: Application
    Filed: November 10, 1997
    Publication date: November 15, 2001
    Inventors: NOBUYA SEKO, YOSHINORI TOMIHARI
  • Patent number: 6317106
    Abstract: A magnetic matrix display device has a grid electrode in which differing first grid (G1) and second grid (G2) apertures are used. A sensor element and a second grid electrode are combined as a single structure. Other aspects of the invention relate to a deflection anode having reduced capacitance, the use of a polyimide coating for the grid electrodes, the use of a compliant mounting and adjustment for a grid assembly and the provision of an illuminated border on a magnetic matrix display.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: November 13, 2001
    Assignee: International Business Machines Corporation
    Inventors: John Stuart Beeteson, Andrew Ramsay Knox, Christopher Carlo Pietrzak
  • Patent number: 6313815
    Abstract: An electron source is constituted of a substrate, and an electron-emitting element provided on the substrate. The electron-emitting element comprises a plurality of electrode pairs having an electroconductive film between each of the electrode pairs. An electron-emitting region is formed on the electroconductive film of selected ones of the electrode pairs.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: November 6, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshihiko Takeda, Ichiro Nomura, Hidetoshi Suzuki, Yoshikazu Banno, Tetsuya Kaneko
  • Patent number: 6300922
    Abstract: A field emission device (10) for reducing the power dissipation of an array (14) includes video controller (12) coupled to array (14) by memory (13), column drivers (16), row drivers (20), and anode power supply (22). Column drivers (16) includes PWM circuit (17) coupled to signal conditioner (18). Signal conditioner (18) receives input digital signal (24) from PWM circuit (17) and generates output digital signal (26) that reduces the frequency of state transitions of signal (24) while maintaining the same duty cycle as that of signal (24). This reduces the power dissipation of parasitic capacitances (36) associated with array (14) pursuant to the equation P=½CV2f.
    Type: Grant
    Filed: January 4, 1999
    Date of Patent: October 9, 2001
    Assignee: Texas Instruments Incorporated
    Inventor: Ross E. Teggatz
  • Patent number: 6288695
    Abstract: A display apparatus employs a field emission display device with pixels which are turned on and off in accordance with different bits of video words that are being displayed. The field emission display device is driven so that its pixels emit light at different intensity levels, depending upon the rank of the bits that are being displayed.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: September 11, 2001
    Inventor: Lawson A. Wood
  • Publication number: 20010013847
    Abstract: A transmissive display device using a micro light modulator that is capable of improving a light efficiency. In the display device, light-path converting members are provided on stationary members to change a path of a light inputted obliquely through stationary members and movable members vertically with respect to a display screen.
    Type: Application
    Filed: December 4, 2000
    Publication date: August 16, 2001
    Inventors: Yong Sung Ham, Heum Il Baek, Je Hong Kim
  • Publication number: 20010011977
    Abstract: A semiconductor device for use in field emission displays includes a substrate formed from a semiconductor material, glass, soda lime, or plastic. A first layer of a conductive material is formed on the substrate. A second layer of microcrystalline silicon is formed on the first layer. This layer has characteristics that do not fluctuate in response to conditions that vary during the operation of the field emission display, particularly the varying light intensity from the emitted electrons or from the ambient. One or more cold-cathode emitters are formed on the second layer.
    Type: Application
    Filed: January 30, 2001
    Publication date: August 9, 2001
    Inventors: David A. Cathey, Kevin W. Tjaden, Behnam Moradi, John K. Lee, James J. Alwan
  • Patent number: 6252569
    Abstract: One anode 350 and multiple cathodes 50, 60, 70, and 80 create a large display field emission device. The use of one anode 350 facilitates an image which is seamless to the viewer. The use of multiple cathodes 50, 60, 70, and 80 allows a single image or multiple images to be displayed. The use of multiple cathodes also provides fast refresh rates and a high resolution image. Methods of fabricating and operating the large display field emission device are disclosed.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: June 26, 2001
    Assignee: Texas Instruments Incorporated
    Inventors: Lester L. Hodson, Charles E. Primm
  • Patent number: 6184851
    Abstract: It is an object of the invention to provide an image forming apparatus capable of easily obtaining a white balance and performing image display with excellent color reproduction properties, and a method of manufacturing and adjusting the image forming apparatus. A plurality of surface conduction electron-emitting devices (1002) are arranged on a substrate (1001). Light emission is performed in accordance with the colors (R, G, and B) of phosphors applied to a phosphor film (1008) upon electron emission from the devices, so that an image is formed. The electron-emitting characteristics of the surface conduction electron-emitting devices (1002) are shifted in advance in correspondence with corresponding phosphor colors. Therefore, a satisfactory white balance of light emission of the R, G, and B phosphors can be obtained.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: February 6, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Eiji Yamaguchi, Hidetoshi Suzuki
  • Patent number: 6181308
    Abstract: A semiconductor device for use in field emission displays includes a substrate formed from a semiconductor material, glass, soda lime, or plastic. A first layer of a conductive material is formed on the substrate. A second layer of microcrystalline silicon is formed on the first layer. This layer has characteristics that do not fluctuate in response to conditions that vary during the operation of the field emission display, particularly the varying light intensity from the emitted electrons or from the ambient. One or more cold-cathode emitters are formed on the second layer.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: January 30, 2001
    Assignee: Micron Technology, Inc.
    Inventors: David A. Cathey, Jr., Kevin W. Tjaden, Behnam Moradi, John K. Lee, James J. Alwan
  • Patent number: 6175344
    Abstract: A field emission image display that can provide color blur-free, high brightness, high resolution images is provided. Patchlike cathode electrodes are connected in a zigzag pattern with cathode lead-out electrodes. Plural patchlike gate electrode pairs arranged in the row direction in two lines of patchlike gate electrodes adjacent to each gate lead-out electrode are connected to the gate lead-out electrode every other row. The right neighbor patchlike gate electrode and the left neighbor patchlike gate electrode with respect to the patchlike gate electrodes to be driven are set to a low potential. At the same time, the anode electrode area immediately above the driven patchlike gate electrode is driven. Anode electrodes neighbor to the driven anode electrode are set to a low potential.
    Type: Grant
    Filed: August 12, 1998
    Date of Patent: January 16, 2001
    Assignee: Futaba Denshi Kogyo Kabushiki Kaisha
    Inventor: Mitsuru Tanaka