Scanning apparatus and method for operating the apparatus
AssigneeSiemens Aktiengesellschaft
InventorBalint Sipos
Life of this patent
Estimating the term…
Abstract
Image scanning apparatus, such as an image pickup device with a photo cathode in a vacuum system or a flat display device with a thermal cathode, having at least one hole matrix for row and column control of the electron stream between its cathode and anode, and at least two separately controllable electrodes for controlling the rows and columns of each row of holes of the hole matrix, the electrodes being arranged in separate planes and tied together in jointly controllable groups permitting a small distance between the cathode and the anode thereby providing a flat camera or display in a television system.
Claims12
In apparatus which contains a cathode for electron emission and an anode on which the electrons impinge, an improved scanning system comprising:
- (a) at least one hole matrix having therein a plurality of holes, arranged in rows and columns, disposed between the cathode and the anode for row and column control of the electron stream;
- and
- (b) at least two separately controllable sets of electrodes disposed in at least two different planes parallel to the plane of said hole matrix for control of the holes in said matrix, with the electrodes in one of said planes arranged in plurality of groups each group comprising electrodes which are at a predetermined spacing from each other, said spacing being at least three rows or three columns, each of said groups being jointly controllable and the electrodes in a further plane grouped in jointly controllable electrode groups which comprise at least three adjacent electrodes.
A method of operating scanning apparatus which is disposed within a vacuum-tight enclosure and which includes a cathode for electron emission, an anode on which the electrons impinge and a scanning system which includes at least one hole matrix having therein a plurality of holes, arranged in rows and columns, disposed between the cathode and the anode for row and column control of the electron stream;
- and at least two separately controllable sets of electrodes disposed in at least two different planes parallel to the plane of said hole matrix for control of the holes in said matrix with the electrodes in one of said planes arranged in plurality of groups each group comprising electrodes which are at a predetermined spacing from each other, said spacing being at least three rows or three columns, each of said groups being jointly controllable and the electrodes in a further plane grouped in jointly controllable electrode groups which comprise at least three adjacent electrodes comprising;
- (a) sequentially and repetitively feeding control pulses which permit the electrons to pass to the individual control groups of said one electrode plane for sequential control of the rows;
- (b) simultaneously supplying a control pulse to a group of the control electrodes of the next plane, said pulse having a length which is equal to the time required to feed pulses to all of the individual control groups of said one plane;
- (c) sequentially feeding said pulse to subsequent groups in said next plane in synchronism with the feeding of a first control pulse to the first of the individual control groups in said one plane;
- and
- (d) similarly simultaneously sequentially and synchronously feeding to control groups in any further planes a control pulses having a duration corresponding to the duration required to sequence through all control groups of the previous plane.
Dependencies are inferred from the claim text.