# US 5,703,610 A · Drive circuit for image display device

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- Number: US 5,703,610 A
- Document ID: US5703610A
- Status: Granted
- Kind: A
- Application number: 08/609,348
- Filed: 1996-03-01
- Granted: 1997-12-30
- Earliest claimed: 1995-03-03
- Assignees: Futaba Denshi Kogyo K.K.
- Inventors: Takao Kishino; Koji Onodaka; Mitsuru Tanaka; Satoshi Yamaguchi
- Web page: https://patentgrep.com/patent/US5703610A

## CPC

- G09G 3/22: using controlled light sources
- H01J 31/127: {using large area or array sources, i.e. essentially a source for each pixel group}
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H)

## Abstract

A drive circuit for an image display device capable of permitting anode lead-out wires to be led out without using a three-dimensional wiring structure and an image free of color bleeding to be displayed. Two-divided first and second anode electrodes are arranged opposite to stripe-like gate electrodes and are alternately driven. During driving of the first anode electrodes, cathode electrodes are scanned and only gate electrodes opposite to the anode electrodes are fed with image data. Then, the second anode electrodes are driven and scanning is likewise carried out. Thus, an image for one frame is displayed. Electrodes arranged on both sides of each of the anode electrodes and gate electrodes in a manner to be adjacent thereto have a potential kept at a ground level.

## Claims

### Claim 1

A drive circuit for an image display device, wherein said image display device comprises:
a first substrate;
a plurality of cathode electrodes formed on said first substrate in a stripe-like manner and including emitters for field-emitting electrons;
cathode lead-out electrodes led out of said cathode electrodes, respectively;
a plurality stripe-like gate electrodes laminatedly formed on said cathode electrodes in a manner to be perpendicular to said cathode electrodes while being insulated from said cathode electrodes;
gate lead-out electrodes led out of said gate electrodes, respectively;
a second substrate arranged so as to be spaced at a predetermined distance from said first substrate;
a plurality of stripe-like anode electrodes arranged in parallel to said gate electrodes and opposite to said gate electrode in positional relationship of 1:1;
phosphors arranged on said anode electrodes in turn to display a color image; and
a first anode lead-out electrode connected to said anode electrodes at every second interval and a second anode lead-out electrode connected to the remaining part of said anode electrodes;
said first and second anode lead-out electrodes being alternately driven;
only a part of said gate electrodes arranged opposite to said anode electrodes driven being driven;
a part of said gate electrodes adjacent to said gate electrodes driven being kept at a low level.

### Claim 2 (depends on 1)

A drive circuit as defined in claim 1, wherein said image display device further comprises at least one dummy electrode arranged on each of both sides of said gate electrodes for preventing leakage luminescence.

### Claim 3 (depends on 1, 2)

A drive circuit as defined in claim 1 or 2, wherein said image display device further comprises at least one dummy electrode arranged on each of both sides of said anode electrodes for preventing leakage luminescence.