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公开(公告)号：WO0051154A8
公开(公告)日：2000-11-23
申请号：PCT/US0001940
申请日：2000-01-26
Applicant: CANDESCENT TECH CORP
Inventor： CHAKRAVORTY KISHORE K , NADI FARIBORZ , SPINDT CHRISTOPHER J , HANSEN RONALD L , STANNERS COLIN D
Abstract: A structure and method for forming a column electrode for a field emission display device wherein the column electrode (702) is disposed beneath the field emitters and the row electrode. In one embodiment, the present invention comprises depositing a resistor layer (706) over portions of a column electrode (702). Next, an inter-metal dielectric layer (708) is deposited over the column electrode. In the present embodiment, the inter-metal dielectric layer (708) is deposited over portions of the resistor layer (706) and over pad areas (704a, 704b) of the column electrode (702). After the deposition of the inter-metal dielectric layer (708), the column electrode (702) is subjected to an anodization process such that the exposed regions of the column electrode (702) are anodized. In so doing, the present invention provides a column electrode structure (702) which is resistant to column to row electrode shorts and which is protected from subsequent processing steps.
Abstract translation: 一种用于形成用于场致发射显示装置的列电极的结构和方法，其中列电极（702）设置在场发射极和行电极之下。 在一个实施例中，本发明包括在列电极（702）的部分上沉积电阻层（706）。 接下来，在列电极上沉积金属间介电层（708）。 在本实施例中，金属间介电层（708）沉积在列电极（702）的电阻层（706）和焊盘区域（704a，704b）的部分上。 在沉积金属间介电层（708）之后，对列电极（702）进行阳极氧化处理，使得列电极（702）的暴露区域被阳极氧化。 在这样做时，本发明提供了一种对柱对电极短路有抵抗能力的列电极结构（702），其不受后续处理步骤的保护。
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公开(公告)号：WO0013168A9
公开(公告)日：2000-10-05
申请号：PCT/US9915893
申请日：1999-07-14
Applicant: CANDESCENT TECH CORP
Inventor： MASLENNIKOV IGOR L , URBON DENNIS M , SPINDT CHRISTOPHER J , HANSEN RONALD L , CURTIN CHRISTOPHER J
CPC classification number: G09G3/22 , G09G3/2011 , G09G2310/0267 , G09G2310/06 , G09G2320/029 , G09G2320/043 , G09G2330/02 , G09G2330/028
Abstract: A field emission display (700) having an improved operational life. In one embodiment, the field emission display (700) comprises a plurality of row lines (230), a plurality of column lines (250), and a plurality of electron emissive elements (40) disposed at intersections of the plurality of row lines (230) and column lines (250), a column driver circuit (740) and a row driver circuit (720). The column driver circuit (740) is coupled to drive column voltage signals over the plurality of column lines (250); and the row driver circuit (720) is coupled to activate and deactivate the plurality of row lines (230) with row voltage signals. According to the present invention, operation life of the field emission display is 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 (770). The row driver circuit (720), upon receiving the SLEEP signal (770), drives a sleep-mode voltage over the row lines (230) to reverse-bias the electron emissive elements.
Abstract translation: 场发射显示器（700）具有改进的操作寿命。 在一个实施例中，场致发射显示器（700）包括多个行线（230），多个列线（250）以及多个电子发射元件（40），所述多个电子发射元件设置在多条行线的交叉点处 230）和列线（250），列驱动器电路（740）和行驱动器电路（720）。 列驱动器电路（740）被耦合以通过多条列线（250）驱动列电压信号; 并且行驱动器电路（720）被耦合以利用行电压信号来激活和去激活多条行线（230）。 根据本发明，当电子发射元件被列电压信号和行电压信号间歇地反向偏置时，场发射显示器的工作寿命延长。 在另一个实施例中，行驱动器电路响应于SLEEP信号（770）。 行驱动器电路（720）在接收到睡眠信号（770）时驱动行线（230）上的睡眠模式电压以反向偏置电子发射元件。
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公开(公告)号：WO03002957A3
公开(公告)日：2003-05-01
申请号：PCT/US0220243
申请日：2002-06-24
Applicant: CANDESCENT TECH CORP
Inventor： CUMMINGS WILLIAM , DUNPHY JAMES C , HANSEN RONALD L , LIU JUN , CRESSI LEE , STANNERS COLIN , SPINDT CHRISTOPHER J
CPC classification number: G09G3/22 , G09G2320/0233 , G09G2320/0285
Abstract: Method for compensating for brightness variations in a field emission device (100a). In one embodiment, a method and system are described for measuring the relative brightness of rows of a field emission display (FED) device (100a), storing information representing the measured brightness into a correction table and using the correction table to provide uniform row brightness in the display by adjusting row voltages and/or row on-time periods. A special measurement process is described for providing accurate current measurements on the rows. This embodiment compensates for brightness variations of the rows, e.g., for rows near the spacer walls (30). In another embodiment, a periodic signal, e.g., a high frequency noise signal (340), is added to the row on-time pulse in order to camouflage brightness variations in the rows near the spacer walls (30). In another embodiment, the area under the row on-time pulse is adjusted to provide row-by-row brightness compensation based on correction values stored in a memory resident correction table (60). In another embodiment, the brightness of each row is measured and compiled into a data profile for the FED. The data profile is used to control cathode burn-in processes so that brightness variations are corrected by physically altering the characteristics of the emitters of the rows.
Abstract translation: 用于补偿场发射器件（100a）中的亮度变化的方法。 在一个实施例中，描述了用于测量场致发射显示器（FED）设备（100a）的行的相对亮度的方法和系统，将表示测量的亮度的信息存储到校正表中并且使用校正表来提供均匀的行亮度 在显示器中通过调节行电压和/或行导通时间周期。 描述了一种特殊的测量过程，用于在行上提供精确的电流测量。 该实施例补偿了行的亮度变化，例如对于间隔壁（30）附近的行。 在另一个实施例中，将周期性信号（例如高频噪声信号（340））加到行导通时间脉冲上以便伪装间隔壁（30）附近的行中的亮度变化。 在另一个实施例中，基于存储在存储器驻留校正表（60）中的校正值来调整行导通时间脉冲下的面积以提供逐行亮度补偿。 在另一个实施例中，每行的亮度被测量并被编译成用于FED的数据简档。 数据配置文件用于控制阴极老化过程，以便通过物理改变行发射器的特性来校正亮度变化。
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4.发明申请PROCEDURES AND APPARATUS FOR TURNING-ON AND TURNING-OFF ELEMENTS WITHIN A FED DEVICE 审中-公开用于在FED设备内打开和关闭元件的程序和设备
公开(公告)号：WO02073582A3
公开(公告)日：2002-11-14
申请号：PCT/US0206067
申请日：2002-02-26
Applicant: CANDESCENT TECH CORP
Inventor： DUNPHY JAMES C , HANSEN RONALD L , LINDBERG BRIAN E , TRUPPA JEROME M , ELLOWAY DONALD J , AMANIAMPONG DUKE K
IPC: H01J29/04 , G09G3/20 , G09G3/22 , H01J9/44 , H01J29/28 , H01J29/62 , H01J29/94 , H01J29/96 , H01J31/12 , G09G3/10
CPC classification number: H01J9/44 , G09G3/22 , G09G2310/066 , H01J2209/0223
Abstract: A circuit and method for turning-on and turning-off elements of an field emission display device to protect against emitter electrode(60) and gate electrode(50) degradation. The circuit(910) includes control logic(916) having a sequencer which in one embodiment can be realized using a state machine. Upon power-on, the control logic sends an enable signal to a high voltage power supply (912) that supplies voltage to the anode electrode (914). At this time a low voltage power supply (918) and driving circuitry (920)are disabled. Upon receiving a confirmation signal from the high voltage power supply, the control logic enables the low voltage power supply which supplies voltage to the driving circuitry (920). Upon receiving a confirmation signal from the low voltage power supply (918), or optionally after expiration of a predetermined time period, the control logic (916) then enables the driving circuitry (920) which drives the gate electrodes (50) and the emitter electrodes (60) which make up the rows and columns of the FED device. Upon power down, the control logic (916) first disables the low voltage power supply (918), then the high voltage power supply (912).
Abstract translation: 一种用于导通和关断场致发射显示设备的元件的电路和方法，以防止发射电极（60）和栅电极（50）退化。 电路（910）包括具有定序器的控制逻辑（916），定序器在一个实施例中可以使用状态机来实现。 在通电时，控制逻辑将启动信号发送到将电压供应到阳极电极（914）的高压电源（912）。 此时，低压电源（918）和驱动电路（920）被禁用。 在从高压电源接收到确认信号时，控制逻辑启用向驱动电路（920）供应电压的低压电源。 一旦从低电压电源（918）接收到确认信号，或者可选地在预定时间段期满后，控制逻辑（916）然后启用驱动电路（920），其驱动栅电极（50）和发射器 构成FED装置的行和列的电极（60）。 在断电时，控制逻辑（916）首先禁用低电压电源（918），然后禁用高电压电源（912）。
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公开(公告)号：EP1018134A4
公开(公告)日：2001-02-21
申请号：EP98944670
申请日：1998-09-02
Applicant: CANDESCENT TECH CORP
Inventor： HANSEN RONALD L , FRIEDMAN JAY
CPC classification number: G09G3/2011 , G09G3/22 , G09G2310/0267 , G09G2310/027 , G09G2320/043 , G09G2320/0606 , G09G2320/0666
Abstract: A circuit and method for controlling the color balance of a flat panel display without losing gray scale resolution of the display screen. Within a FED screen (200), a matrix of rows and columns is provided and emitters are situated within each row-column intersection. Rows are activated sequentially by row drivers (220a-220c) and corresponding individual gray scale information (voltages) is driven over the columns by column drivers (240-240c). When the proper voltage is applied across the cathode and anode of the emitters, they release electrons toward a phosphor spot, e.g., red, green, blue, causing an illumination point. Within each column driver (240a-240c), a digital to analog converter (340a-340c) contains two data-in voltage-out transformation functions, a first function corresponding to a first voltage intensity and a second function corresponding to a lesser voltage intensity for a same digital color value.
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Patent Agency Ranking
公开(公告)号：AU2003230953A1
公开(公告)日：2003-11-10
申请号：AU2003230953
申请日：2003-04-18
Applicant: CANDESCENT TECH CORP
Inventor： IGUCHI YUKINOBU , HANSEN RONALD L , DUNPHY JAMES C , SPINDT CHRISTOPHER J , CLEEVES JAMES M , TRUPPA JEROME M , FINK GREGORY M
Abstract: A field emission display (FED) having a correction system with a correction coefficient derived from emission current is presented. Within one embodiment in accordance with the present invention, a field emission display has an anode at the faceplate and a focus structure. The anode potential is held at ground while the focus structure potential is held between, but is not limited to, 40 and 50 volts. The current flowing to the focus structure is measured and used as the basis for the correction coefficient for the field emission display.
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公开(公告)号：AU2002320162A1
公开(公告)日：2003-03-03
申请号：AU2002320162
申请日：2002-06-24
Applicant: CANDESCENT TECH CORP
Inventor： HANSEN RONALD L , CRESSI LEE , SPINDT CHRISTOPHER J , DUNPHY JAMES C , LIU JUN , CUMMINGS WILLIAM , STANNERS COLIN
Abstract: In a field emission display (FED) device comprising: rows and columns of emitters; and an anode electrode, a method of measuring display attributes of said FED device comprising the steps of: a) in a scan fashion, individually driving each row and measuring the current drawn by each row, wherein a settling time is allowed after each row is driven; b) measuring a background current level during a vertical blanking interval; c) correcting current measurements taken during said step a) by said background current level to yield corrected current measurements; d) averaging multiple corrected current measurements taken over multiple display frames to produce averaged corrected current values for all rows of said FED device; and e) generating a memory resident correction table based on said averaged corrected current values.
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公开(公告)号：AU2003297964A1
公开(公告)日：2004-06-18
申请号：AU2003297964
申请日：2003-11-19
Applicant: CANDESCENT TECH CORP
Inventor： HANSEN RONALD L
Abstract: The present invention is a system and method for monitoring FED performance and compensating for adverse impacts associated with display emission generation. A present invention FED adjustment system and method is capable of providing real time emission characteristic monitoring during retrace periods. In one present emission compensation method a feedback type process is utilized that drives a constant level on dummy pixels not included in the active viewing area and compares the results (e.g., the current that is associated with the emission) to an expected certain predetermined amount. If the current is too high then the voltage supply is reduced to the drive level or if the current is to low the voltage is increased. A driver voltage is supplied and an image is presented in an active pixel region during an active presentation time. Emissions are produced in a test pixel during a nonactive presentation and a determination is made if the emissions in the test area are accurate. If the emissions are not accurate, adjustments to the pixels are made to provide a desired level.
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公开(公告)号：AU2003230953A8
公开(公告)日：2003-11-10
申请号：AU2003230953
申请日：2003-04-18
Applicant: CANDESCENT TECH CORP , SONY CORP
Inventor： IGUCHI YUKINOBU , HANSEN RONALD L , DUNPHY JAMES C , SPINDT CHRISTOPHER J , CLEEVES JAMES M , TRUPPA JEROME M , FINK GREGORY M
Abstract: A field emission display (FED) having a correction system with a correction coefficient derived from emission current is presented. Within one embodiment in accordance with the present invention, a field emission display has an anode at the faceplate and a focus structure. The anode potential is held at ground while the focus structure potential is held between, but is not limited to, 40 and 50 volts. The current flowing to the focus structure is measured and used as the basis for the correction coefficient for the field emission display.
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公开(公告)号：HK1025871A1
公开(公告)日：2000-11-24
申请号：HK00103525
申请日：2000-06-12
Applicant: CANDESCENT TECH CORP
Inventor： HANSEN RONALD L , SPINDT CHRISTOPHER J , FIELD JOHN E
Abstract: A voltage-adjustment section (20) of an electronic device converts an input control voltage (V1) into an output control voltage (V0) in such a way that a collector current (ICP) form with electrons emitted from an emitter (EP) of an emission/collection cell (26), or triode, varies in a desired, typically linear, manner with the input control voltage. The triode further includes a collector (CP) that carries the collector current and a gate electrode (GP) that regulates the collector current as a function of the output control voltage. Control of the collector current so as to achieve the desired current/voltage relationship is achieved with an analog control loop containing the triode and an amplifier (28) coupled between the triode's collector and gate electrode. The triode thus typically has a linear gamma characteristic relative to the input control voltage. The voltage-adjustment section is suitable for use in a display device such as a flat-panel display.
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