Magnetic liquid display panel

• US 20040150614A1
• Filed: 03/05/2004
• Published: 08/05/2004
• Est. Priority Date: 04/11/2001
• Status: Active Grant

• Current Assignee: Hongik University Industry-Academic Cooperation Foundation
• Original Assignee: Hongik University Industry-Academic Cooperation Foundation
• Inventors: Seo, Jong-Wook
• Granted Patent: US 7,199,773 B2
• Time in Patent Office: Days
• US Class Current: 345/111
• CPC Class Codes: G02F 1/091 based on magneto-absorption or magneto-reflection
• CPC Class Codes: G02F 1/094 based on magnetophoretic effect
• CPC Class Codes: G02F 2201/123 pixel

Abstract

A magnetic display panel is provided, including strips of first electrodes arranged in the first direction on the inner surface of a rear plate. Strips of second electrodes are arranged in the second direction perpendicular to the first electrodes while being insulated from the first electrodes. Pixel electrodes are each installed on the intersection of a first electrode and a second electrode, and each has a spiraled magnetic field producing unit electrically connected to the first and second electrodes. A magnetic film is formed on the pixel electrodes, and has a magnetic gap through which a magnetic field produced by the pixel electrodes leaks. Magnetic fluid is formed to a predetermined thickness on the inner surface of the rear plate. Such a display panel can provide moving pictures because of its improved responsivity, and, particularly, is easily fabricated at a low cost in large quantities because of its simple structure. Furthermore, the display panel is advantageous in constituting super-large display devices based on multiple integration.

Claims

1. A magnetic display panel comprising:

front and rear plates keeping a predetermined distance from each other;

strips of first electrodes arranged in the first direction on the inner surface of the rear plate;

strips of second electrodes arranged in the direction perpendicular to the first electrodes while being insulated from the first electrodes;

pixel electrodes each installed on the intersection of a first electrode and a second electrode, the pixel electrodes each having a spiraled magnetic field producing unit electrically connected to the first and second electrodes;

an upper magnetic film formed on the pixel electrodes, the upper magnetic film having a magnetic gap through which a magnetic field produced by the pixel electrodes leaks; and

magnetic fluid formed to a predetermined thickness on the inner surface of the rear plate.

2. The magnetic display panel of claim 1, wherein the upper magnetic film is formed of a soft magnetic material.

3. The magnetic display panel of claim 1, wherein each of the pixel electrodes has a plurality of magnetic field producing units electrically connected to one another.

4. The magnetic display panel of any of claims 1 through 3, wherein 2 magnetic gaps for each magnetic field producing unit are formed in the upper magnetic film, and each of the magnetic gaps is formed halfway between the center of a magnetic field producing unit and either lateral side of the magnetic field producing unit.

5. The magnetic display panel of any of claims 1 through 3, wherein a magnetic shield layer, which corresponds to a lower magnetic film, is formed of a magnetic material under the pixel electrodes.

6. The magnetic display panel of claim 4, wherein a magnetic shield layer, which corresponds to a lower magnetic film, is formed of a magnetic material under the pixel electrodes.

7. The magnetic display panel of claim 5, wherein the magnetic shield layer and the upper magnetic film form a closed-loop-shaped magnetic circuit.

8. The magnetic display panel of claim 6, wherein the magnetic shield layer and the upper magnetic film form a closed-loop-shaped magnetic circuit.

9. A magnetic display panel comprising:

front and rear plates keeping a predetermined distance from each other;

strips of first electrodes arranged in the first direction on the inner surface of the rear plate;

strips of second electrodes arranged in the direction perpendicular to the first electrodes while being insulated from the first electrodes;

pixel electrodes each installed on the intersection of a first electrode and a second electrode, the pixel electrodes each having a spiraled magnetic field producing unit electrically connected to the first and second electrodes;

a lower magnetic film formed on the pixel electrodes, the lower magnetic film having a magnetic gap through which a magnetic field produced by the pixel electrodes leaks;

an upper magnetic film formed over the lower magnetic film; and

magnetic fluid formed to a predetermined thickness on the inner surface of the rear plate.

10. The magnetic display panel of claim 9, wherein the upper and lower magnetic films are formed of a soft magnetic material.

11. The magnetic display panel of claim 9, wherein each of the pixel electrodes has a plurality of magnetic field producing units electrically connected to one another.

12. The magnetic display panel of any of claims 9 through 11, wherein 2 magnetic gaps for each magnetic field producing unit are formed in the upper magnetic film, and each of the magnetic gaps is formed halfway between the center of a magnetic field producing unit and either lateral side of the magnetic field producing unit.

13. The magnetic display panel of any of claims 9 through 11, wherein a magnetic shield layer is formed of a ferromagnetic material under the pixel electrodes.

14. The magnetic display panel of claim 12, wherein a magnetic shield layer is formed of a ferromagnetic material under the pixel electrodes.

15. The magnetic display panel of claim 13, wherein the magnetic shield layer and the upper magnetic film form a closed-loop-shaped magnetic circuit.

16. The magnetic display panel of claim 14, wherein the magnetic shield layer and the upper magnetic film form a closed-loop-shaped magnetic circuit.