# US 8,542,493 B2 · Flat display apparatus and high-voltage power supply

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- Number: US 8,542,493 B2
- Document ID: US8542493B2
- Status: Granted
- Kind: B2
- Application number: 12/835,851
- Filed: 2010-07-14
- Published: 2011-02-03
- Granted: 2013-09-24
- Earliest claimed: 2009-07-28
- Assignees: Canon Kabushiki Kaisha
- Applicants: Naoto Abe; Eisaku Tatsumi; Tatsuya Nakajima
- Inventors: Naoto Abe; Eisaku Tatsumi; Tatsuya Nakajima
- Web page: https://patentgrep.com/patent/US8542493B2

## CPC

- H05K 5/02: Details
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A flat display apparatus has a flat display panel; a frame that is installed on a rear face side of the display panel; a cover that covers at least a rear face side of the frame; and a high-voltage power supply that applies high voltage to the display panel. The high-voltage power supply has a plurality of cases, each of which encloses one or more transformers and rectifier circuits, and obtains high voltage by connecting the plurality of cases in series, and the plurality of cases are arranged in a space created between the frame and the cover so as to be disposed on a plane in parallel with a screen of the display panel.

## Claims

### Claim 1

A flat display apparatus, comprising:
a flat display panel;
a frame that is installed on a rear face side of the display panel;
a cover that covers at least a rear face side of the frame; and
a high-voltage power supply that applies high voltage to the display panel, wherein
the high-voltage power supply has a plurality of cases, each of which encloses one or more transformers and rectifier circuits, and obtains high voltage by connecting the plurality of cases in series, and
the plurality of cases are arranged in a space created between the frame and the cover so as to be disposed on a plane in parallel with a screen of the display panel.

### Claim 2 (depends on 1)

The flat display apparatus according to claim 1, wherein each of the cases is arranged to maintain predetermined spatial distances from the frame and the cover.

### Claim 3 (depends on 1)

The flat display apparatus according to claim 1, wherein
the high-voltage power supply further has a voltage dividing resistor that divides the high voltage that is output from the high-voltage power supply, and a control circuit that controls the output voltage of each of the cases by feeding back a potential obtained by dividing voltage.

### Claim 4 (depends on 1)

The flat display apparatus according to claim 1, wherein
the high-voltage power supply has a printed circuit board that is installed in the frame via a spacer,
the printed circuit board has an opening, and
each of the cases is disposed in the opening and mounted on the printed circuit board.

### Claim 5 (depends on 1)

The flat display apparatus according to claim 1, wherein inside of the case is filled with insulating and impregnating material.

### Claim 6

A high-voltage power supply for applying high voltage to a flat display panel in a flat display apparatus having the flat display panel, a frame that is installed on a rear face side of the display panel, and a cover that covers at least a rear face side of the frame,
the high-voltage power supply having a plurality of cases, each of which encloses one or more transformers and rectifier circuits, and obtaining high voltage by connecting the plurality of cases in series, and
the plurality of cases being arranged in a space created between the frame and the cover so as to be disposed on a plane in parallel with a screen of the display panel.

### Claim 7 (depends on 6)

The high-voltage power supply according to claim 6, wherein each of the cases is arranged to maintain predetermined spatial distances from the frame and the cover.

### Claim 8 (depends on 6)

The high-voltage power supply according to claim 6, further comprising:
a voltage dividing resistor that divides the high voltage that is output from the high-voltage power supply; and
a control circuit that controls output voltage of each of the cases by feeding back a potential obtained by dividing voltage.

### Claim 9 (depends on 6)

The high-voltage power supply according to claim 6, further comprising a printed circuit board that is installed in the frame via a spacer, wherein
the printed circuit board has an opening, and
each of the cases is disposed in the opening and mounted on the printed circuit board.

### Claim 10 (depends on 6)

The high-voltage power supply according to claim 6, wherein inside of the case is filled with insulating and impregnating material.