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87 条记录 (耗时 0.015 秒)

    Ballast circuit for gaseous discharge lamp
    51.
    发明授权
    Ballast circuit for gaseous discharge lamp 失效
    气体放电灯镇流器电路

    公开(公告)号：US5023518A

    公开(公告)日：1991-06-11

    申请号：US283255

    申请日：1988-12-12

    申请人： Wayne K. Mans ,  Vincent J. Rizzo

    发明人： Wayne K. Mans ,  Vincent J. Rizzo

    IPC分类号： H05B41/285 ,  H05B41/36 ,  H05B41/38 ,  H05B41/44

    CPC分类号： H05B41/44 ,  H05B41/2858 ,  H05B41/36 ,  H05B41/38 ,  Y10S315/04 ,  Y10S315/07

    摘要： A ballast circuit for a gaseous discharge lamp, particularly a neon light, includes a diode bridge rectifier for producing a d-c voltage from an a-c input and a transformer with a secondary winding connected to the lamp and a primary winding connected to the rectifier. A switching circuit is connected to the transformer primary winding for controlling a flow of current therethrough from the rectifier. The switching circuit includes at least one MOSFET having a drain terminal connected to the transformer primary winding and a grounded source terminal. A control circuit is connected to a gate terminal of the MOSFET for controlling the on and off times thereof, the control circuit including a pulse generator for producing a train of pulse-width-modulated rectangular pulses of substantially a single frequency fed to the MOSFET's gate terminal. The pulse generator includes circuitry for changing the width of the rectangular pulses to enable a gradual energization of the gaseous discharge lamp from one end thereof towards an opposite end to create a writing effect of selectively different speeds in the gaseous discharge lamp. The circuitry in the pulse generator for changing the pulse width can be used to control the widths of the pulses so that the pulses are a train of square waves having a common duration equal to an interpulse period, whereby striations are generated in the gaseous discharge lamp.

    摘要翻译： 用于气体放电灯，特别是霓虹灯的镇流器电路包括用于从a-c输入端产生d-c电压的二极管桥式整流器和连接到灯的次级绕组的变压器和连接到整流器的初级绕组。 开关电路连接到变压器初级绕组，用于控制从整流器流过的电流。 开关电路包括至少一个MOSFET，其具有连接到变压器初级绕组的漏极端子和接地的源极端子。 控制电路连接到MOSFET的栅极端子，用于控制其导通和关断时间，该控制电路包括脉冲发生器，用于产生基本上单个频率的脉冲宽度调制的矩阵脉冲序列，馈送到MOSFET的栅极 终奌站。 脉冲发生器包括用于改变矩形脉冲的宽度的电路，以使气态放电灯从其一端向相对端逐渐通电，从而产生在气体放电灯中选择性地不同速度的写入效应。 用于改变脉冲宽度的脉冲发生器中的电路可以用于控制脉冲的宽度，使得脉冲是具有等于脉冲间周期的公共持续时间的一串方波，从而在气体放电灯中产生条纹 。

    Electronic adornment for simulating natural flickering light
    52.
    发明授权
    Electronic adornment for simulating natural flickering light 失效
    用于模拟自然闪烁光的电子装饰

    公开(公告)号：US4777408A

    公开(公告)日：1988-10-11

    申请号：US877333

    申请日：1986-06-23

    申请人： Frederick P. DeLuca

    发明人： Frederick P. DeLuca

    IPC分类号： H05B41/44 ,  H05B37/02

    CPC分类号： A44C15/0015 ,  H05B41/44 ,  Y10S362/806

    摘要： An electronic adornment for clothing, jewelry and the like includes an electrically operated light emitter and an electrical circuit operative to intermittently actuate the light emitter to closely simulate natural flickering light from faceted gemstones. The electrical circuit includes independent controls for pulse frequency and pulse width.

    摘要翻译： 用于服装，首饰等的电子装饰品包括电操作的光发射器和电路，其可操作以间歇地致动光发射器以紧密模拟来自分面宝石的自然闪烁光。 电路包括脉冲频率和脉冲宽度的独立控制。

    Sequentially addressable display apparatus with means for reversing direction of transfer
    53.
    发明授权
    Sequentially addressable display apparatus with means for reversing direction of transfer 失效
    具有反向转移方向的手段的顺序可寻址显示装置

    公开(公告)号：US3710180A

    公开(公告)日：1973-01-09

    申请号：US3710180D

    申请日：1970-09-18

    申请人： SCHJELDAHL CO

    发明人： ROOKS J

    IPC分类号： H05B41/44 ,  H05B37/02

    CPC分类号： H05B41/44

    摘要： A sequentially addressable numerical display system wherein any of a variety of read-out display arrays such as an array of glow tubes or an AC powered load, such as incandescent lamps on a billboard can be illuminated in a predetermined serial fashion to produce a ''''traveling'''' effect. The system comprises a neon glow tube type sequencer with bi-directional capability wherein pulses applied to the sequencer cause the glow tubes to fire in either forward or reverse sequential order to thereby trigger electronic switching means, permitting corresponding sequential energization of the load.

    摘要翻译： 一种可顺序寻址的数字显示系统，其中可以以预定的串联方式照亮各种读出显示阵列，例如辉光管阵列或交流供电负载（例如广告牌上的白炽灯），以产生“行进 “效果。 该系统包括具有双向能力的氖辉光管式定序器，其中施加到定序器的脉冲使得辉光管以正向或反向顺序的顺序触发，从而触发电子切换装置，允许负载的相应顺序通电。