# US 7,608,990 B2 · Anode plate structure for flat panel light source of field emission

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- Number: US 7,608,990 B2
- Document ID: US7608990B2
- Status: Granted
- Kind: B2
- Application number: 11/357,504
- Filed: 2006-02-17
- Published: 2007-02-15
- Granted: 2009-10-27
- Earliest claimed: 2005-08-10
- Assignees: Industrial Technology Research Institute
- Inventors: Ming-Hung Lin; Yu-Yang Chang; Wei-Yi Lin; Cheng-Chung Lee
- Web page: https://patentgrep.com/patent/US7608990B2

## CPC

- H01J 31/127: {using large area or array sources, i.e. essentially a source for each pixel group}
- H01J 29/862: {of flat panel cathode ray tubes}
- H01J 63/02: Details, e.g. electrode, gas filling, shape of vessel
- H01J 63/04: Vessels provided with luminescent coatings; Selection of materials for the coatings
- H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H)

## Abstract

This invention provides an anode plate structure for a flat panel light source of field emission. The structure for the flat panel light source includes an anode plate structure in addition to a known cathode plate structure. The anode plate structure comprises an anode plate and a fluorescent layer formed on the anode plate. The flat panel light source utilizes a cubic-bump structure of the fluorescent layer or a rough surface of the anode plate to increase the lighting areas per unit volume, thereby enhancing the lighting effect of the light source. In the embodiments of the flat panel light source, the rough surface of the anode plate may be formed with a plurality of cubic-bumps, or have a shape of plural concave lenses.

## Claims

### Claim 1

An anode plate structure for a flat panel light source of field emission, said anode plate structure comprising:
a flat anode plate having flat surfaces on both sides; and
a fluorescent layer formed on said flat anode plate, said fluorescent layer forming a plurality of separated cubic-bumps on the flat surface of said flat anode plate.

### Claim 2 (depends on 1)

The anode plate structure for a flat panel light source of field emission as claimed in claim 1, wherein said flat anode plate comprises at least a substrate, and a reflection layer formed on said substrate.

### Claim 3 (depends on 1)

The anode plate structure for a flat panel light source of field emission as claimed in claim 1, wherein said fluorescent layer with said cubic-bumps is formed by coating the surface of said flat anode plate with a fluorescent paste via a screen printing.

### Claim 4

An anode plate structure for a flat panel light source of field emission, said anode plate structure comprising:
an anode plate having a rough surface formed in a shape of a plurality of cubic concave lenses for enhancing light gathering effect of said flat panel light source; and
a fluorescent layer formed on said rough surface;
wherein said plurality of cubic concave lenses faces a cathode plate of said flat panel light source.

### Claim 5 (depends on 4)

The anode plate structure for a flat panel light source of field emission as claimed in claim 4, wherein said flat anode plate comprises at least a substrate, and a reflection layer formed on said substrate.

### Claim 6 (depends on 4)

The anode plate structure for a flat panel light source of field emission as claimed in claim 4, wherein said rough surface of said anode plate is formed by an etching process.

### Claim 7 (depends on 4)

The anode plate structure for a flat panel light source of field emission as claimed in claim 4, wherein said rough surface of said anode plate is formed by a sand spray process.