发明名称 |
DIGITAL FLASH INTENSITY CONTROL SYSTEM FOR PHOTOTYPESETTERS |
摘要 |
<p>DIGITAL FLASH INTENSITY CONTROL SYSTEM FOR PHOTOTYPESETTERS For variable letter sizes being pnotographically recorded in a second generation phototypesetter, it is desired to increase generated quantities of light flux produced by the flash lamp operating in conjunction with a font disc where larger letter sizes are thereby imaged upon the photosensitive medium, and conversely, to reduce such flux where smaller characters are to be projected. The disclosed system employs a digital letter size code for controlling the amount of charge inserted into a storage capacitor via a digital to analog converter and multivibrator. When the flash lamp is triggered at the appropriate time to selectively illuminate a given character, the energy associated with the stored charge is employed to energize the lamp.</p> |
申请公布号 |
CA1075946(A) |
申请公布日期 |
1980.04.22 |
申请号 |
CA19760263545 |
申请日期 |
1976.10.18 |
申请人 |
ITEK CORPORATION |
发明人 |
EBNER, PETER R.;GRIFFITH, LOUIS E. |
分类号 |
B41B17/00;B41B21/08;B41B21/12;(IPC1-7):41B13/00 |
主分类号 |
B41B17/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|