# US 5,710,592 A · Device realizing 3-D picture

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- Number: US 5,710,592 A
- Document ID: US5710592A
- Status: Granted
- Kind: A
- Application number: 08/546,914
- Filed: 1995-10-23
- Granted: 1998-01-20
- Earliest claimed: 1994-10-29
- Assignees: Kasan Electronics Co., Ltd.
- Inventors: Bong Whan Oh
- Web page: https://patentgrep.com/patent/US5710592A

## CPC

- H04N 13/398: Synchronisation thereof; Control thereof
- H04N 13/341: using temporal multiplexing
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

This invention relates to a device realizing 3-D picture. A device corresponding to the invention shuts a left or a right eye alternately according to horizontal or vertical synchronizing signal and maximally overlaps a closing delay time and an opening delay time, which are generated out of the shutting response characteristic of shutters, with vertical blank or horizontal blank. Therefore, the invention enhances the quality of 3-D picture by preventing a little loss in a frame of picture and by removing, in the sequential scanning mode, the flicking effect.

## Claims

### Claim 1

A device realizing 3-D picture in the interlaced scanning mode, comprising:
means for detecting starting points of horizontal synchronizing signals and vertical synchronizing signal;
means for calculating a phase difference between the horizontal and vertical synchronizing signals and then discriminating between odd and even lines according to the calculated phase difference to produce a discriminated result;
means for shutting a left or a right eye according to the discriminated result and then maintaining the shut state until a next vertical synchronizing signal is detected.

### Claim 2 (depends on 1)

A device as recited in claim 1, further comprising:
means for putting a closing delay time(t.sub.ON) and an opening delay time(t.sub.OFF) of shutters within a vertical blank time which is not displayed onto a screen.

### Claim 3

A device realizing 3-D picture in the sequential scanning mode, comprising:
means for detecting a vertical synchronizing signal and then shutting a predetermined eye.
means for detecting horizontal synchronizing signal;
means for shutting alternatively a left and a right eye according to the detection of horizontal synchronizing signal and maintaining the shut state until a next horizontal synchronizing signal is detected.

### Claim 4 (depends on 3)

A device as recited in claim 3, further comprising:
means for overlapping a closing delay time(t.sub.ON) and an opening delay time(t.sub.OFF) Of shutters with a horizontal blank time.