Display apparatus utilizing cathode ray tubes

Claim 2

Display apparatus comprising a cathode ray tube including a cathode electrode, a display screen, a matrix electrode disposed between said cathode electrode and display screen, said matrix electrode comprising a plurality of y electrode plates and a plurality of x electrode plates, said y and x electrode plates being arranged to form a matrix and having holes at their junctions adapted to pass electrons emitted from said cathode electrode, and a deflection coil disposed between said matrix electrode and said display screen; a plurality of discrete memories connected to control said plurality of x electrode plates, each of said memories being provided for a different group of patterns of the letters, digits and symbols to be displayed on said screen; address memory means for storing thE positions on said screen at which the selected patterns of said letters, digits and symbols are to be displayed; information memory means for storing the information regarding the patterns to be displayed; means responsive to the outputs from said address memory means and said information memory means for selectively driving said plurality of memories to control said x electrode plates, means for controlling said y electrode plates in sequence with the control of said x electrode plates to cause electrons from said cathode electrode to pass through said holes in said plates toward said display screen to form the letters, digits and symbols from one of said groups of patterns; and means for supplying deflection signals to said deflection coil in synchronism with the outputs from said plurality of memories.

Claim 3

The display apparatus according to claim 1 wherein said information memory means is connected to said address memory means such that the contents of said information memory means are read out under the control of said address memory means, and said driving means includes a register connected to said information memory means for receiving said read out contents, a decoder and a gate circuit connected between the output of said register and said plurality of memories and through which said read out contents are supplied to said plurality of memories.

Claim 4

The display apparatus according to claim 2 wherein portions of the outputs from said register are supplied directly to said gate circuit and the remaining portions of the outputs from said register are supplied to said gate circuit through said decoder.

Claim 5

The display apparatus according to claim 1 wherein each one of said plurality of memories for said groups of patterns comprises a plurality of parallel connected diode matrixes, each for one pattern.

Claim 6

The display apparatus according to claim 1 wherein said means for supplying said deflection signals comprised a X-axis stepped wave synthesizer and a Y-axis stepped wave synthesizer.

Claim 7

The display apparatus according to claim 5 which further comprises a start-stop control for controlling the operations of said X-axis stepped wave synthesizer and said Y-axis stepped wave synthesizer and for controlling the operation of said address memory means.

Claim 8

The display apparatus according to claim 5 which further comprises a clock pulse generator and a counter responsive to the output from said clock pulse generator for synchronously controlling the operations of said address memory means, said plurality of memories for said groups of patterns, said X-axis stepped wave synthesizer and said Y-axis stepped wave synthesizer.

Claim 9

The display apparatus according to claim 1 wherein said information memory means comprises a main memory and a submemory.

Claim 10

The display apparatus according to claim 1 wherein said letters, digits and symbols are displayed on said screen in discrete positions spaced across said screen by changes in said deflection signals supplied to said deflection coil, and wherein said cathode ray tube further comprises a grid electrode and an elimination synchronizer connected to said grid electrode and adapted to apply an elimination signal of a very short interval to said grid electrode while said deflection signals change causing said deflection coil to position the next letter, digit or symbol to be displayed on said screen.

Claim 11

A display apparatus for displaying letters, digits, symbols and like patterns, comprising a cathode ray tube including a cathode electrode, a control grid, a display screen, a dot matrix electrode disposed between said cathode electrode and display screen, said matrix electrode comprising a plurality of y electrode plates and a plurality of x electrode plates, said y and x electrode plates being arranged to form a matrix and having holes at their junctions adapted to pass electrons emitted from said cathode electrode, and a deflection coil disposed between said matrix electrode and said display screen; a main memory for storing information regarding the patterns to be displayed on said display screen; a register; an address register for storing the positions on said screen at which selected patterns are to be displayed; a sub-memory, responsive to said address register, connected between the output of said main memory and the input of said register for reading out the information from said main memory and storing the read out information in said register under the control of said address register; a gate circuit; a decoder; connections to supply some of the outputs from said register directly to said gate circuit and to supply others of said outputs from said register to said gate circuit through decoder; a plurality of discrete memories for different types of patterns connected between the output of said gate circuit and said dot matrix electrode of said cathode ray tube for controlling said plurality of x electrode plates in response to the outputs of said gate circuit, each of said discrete memories comprising a plurality of parallel connected diode matrixes, each for one pattern; a deflection circuit for said deflection coil comprising a X-axis stepped wave generator and a Y-axis stepped wave generator; an elimination signal generator connected to said control grid of said cathode ray tube; a clock pulse generator; a counter connected to and responsive to the output pulses from said clock pulse generator, said counter being connected to and adapted to synchronously control said address register, said plurality of discrete memories, said X-axis stepped wave generator, said Y-axis stepped wave generator, said y electrode plates and said elimination signal generator; and a start-stop control connected to and adapted to control said address register, said X-axis stepped wave generator, said Y-axis stepped wave generator and said counter, said x electrode plates and said y electrode plates being sequentially controlled by said discrete memories and said counter to cause electrons from said cathode electrode to pass through said holes in said plates toward said display screen to form letters, digits and symbols from one of said types of patterns.

Claim 12

A display apparatus for displaying letters, digits, symbols and like patterns, comprising a cathode ray tube including a cathode electrode, a control grid, a display screen, a dot matrix electrode disposed between said cathode electrode and display screen, said matrix electrode comprising a plurality of y electrode plates and a plurality of x electrode plates, said y and x electrode plates being arranged to form a matrix and having holes at their junctions adapted to pass electrons emitted from said cathode electrode, and a deflection coil disposed between said matrix electrode and said display screen; a main memory for storing information regarding the patterns to be displayed on said display screen; a register; an address register for storing the positions on said screen at which selected patterns are to be displayed; a sub-memory, responsive to said address register, connected between the output of said main memory and the input of said register for reading out the information from said main memory and storing the read out information in said register under the control of said address register; a gate circuit; a decoder; connections to supply some of the outputs from said register directly to said gate circuit and to supply others of said outputs from said register to said gate circuit through decoder; a plurality of discrete memories for different types of patterns connected between the output of said gate circuit and said dot matrix electrode of said cathode ray tube for controlling said plurality of x electrode plates in response to the outputs of said gate circuit, each of said discrete memories comprising a plurality of parallel connected diode matrixes, each for one pattern; a deflection circuit for said deflection coil comprising a X-axis stepped wave generator and a Y-axis stepped wave generator; an elimination signal generator connected to said control grid of said cathode ray tube; a clock pulse generator; a counter connected to and responsive to the output pulses from said clock pulse generator, said counter being connected to and adapted to synchronously control said address register, said plurality of discrete memories, said X-axis stepped wave generator, said Y-axis stepped wave generator, said y electrode plates and said elimination signal generator; and a start-stop control connected to and adapted to control said address register, said X-axis stepped wave generator, said Y-axis stepped wave generator and said counter, said x electrode plates and said y electrode plates being sequentially controlled by said discrete memories and said counter to cause electrons from said cathode electrode to pass through said holes in said plates toward said display screen to form letters, digits and symbols from one of said types of patterns.