公开(公告)号：US5229689A

公开(公告)日：1993-07-20

申请号：US699824

申请日：1991-05-14

申请人： Larry Forsblad ,  Roy Askeland ,  David Auld

发明人： Larry Forsblad ,  Roy Askeland ,  David Auld

IPC分类号： H01J29/00 ,  H01J29/06

CPC分类号： H01J29/06 ,  H01J29/003 ,  H01J2229/0023

摘要： An electrostatic shield and method for shielding an electric field are presented, having particular application to the reduction of electric field emissions from a CRT display. The electrostatic shield is formed from a flexible non-conductive substrate and includes a plurality of radially disposed conductive elements. The shield is secured to the outer surface of the CRT, between the deflection yoke and screen, and the conductive elements are coupled to ground potential. In addition to a method for using the abovedescribed shield, a method is presented for shielding the electric field by applying conductive traces directly to the surface of the CRT, again between the deflection yoke and screen. These traces are coupled to the aquadag coating on the outer surface of the CRT, effectively grounding the traces and providing the desired shielding effect.

摘要翻译： 本发明提供一种用于屏蔽电场的静电屏蔽和方法，其特征在于减少了CRT显示器的电场发射。 静电屏蔽由柔性非导电衬底形成并且包括多个径向设置的导电元件。 屏蔽件固定到CRT的外表面，在偏转线圈和屏幕之间，并且导电元件耦合到地电位。 除了使用上述屏蔽的方法之外，还提出了一种通过将导电迹线直接施加到CRT的表面，再次在偏转线圈和屏幕之间来屏蔽电场的方法。 这些迹线耦合到CRT的外表面上的aquadag涂层，有效地将迹线接地并提供所需的屏蔽效果。