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）。