Method for playing corresponding 3D images according to different visual angles and related image processing system

• US 8,836,773 B2
• Filed: 07/21/2011
• Issued: 09/16/2014
• Est. Priority Date: 08/16/2010
• Status: Expired

• Current Assignee: Wistron Corporation
• Original Assignee: Wistron Corporation
• Inventors: Lin, Ching-An
• Primary Examiner(s): Torrente, Richard
• Assistant Examiner(s): Habib, Irfan
• Application Number:
  US13/187,529
• Publication Number:
  US 20120038757A1
• Time in Patent Office: 1,153 Days
• Field of Search: 348/56
• US Class Current: 348/56
• CPC Class Codes: H04N 13/296 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 13/366 using viewer tracking

Abstract

A 3D image playback method includes utilizing a detecting module to detect a visual angle included between a display device and a shutter glasses, playing a plurality of 3D image sets with different visual angles at a specific frequency by the display device, transmitting a synchronization signal corresponding to the visual angle to the shutter glasses by the detecting module, and controlling a switching frequency of the shutter glasses so as to make the shutter glasses capable of receiving one of the plurality of 3D image sets corresponding to the visual angle.

Claims

1. A method for playing a corresponding 3D image according to different visual angles, the method comprising:

utilizing a first infrared detecting device disposed at a vertical center axis of the display device to detect a first distance between the first infrared detecting device and the shutter glasses;

utilizing a second infrared detecting device disposed on the display device and disposed at the same horizontal axis with the first infrared detecting device to detect a second distance between the second infrared detecting device and the shutter glasses;

calculating a first offset angle of a visual angle according to the first distance, the second distance, a distance between the first infrared detecting device and the second infrared detecting device, and the cosine law without coordinate calculation, the first offset angle being an angle between the shutter glasses not located at a horizontal surface where the first and second infrared detecting devices are located and a horizontal axis relative to the first infrared detecting device;

setting the first offset angle as an offset angle between a vertical projection position of the shutter glasses on the horizontal surface and the horizontal axis relative to the first infrared detecting device;

setting an complementary angle of the offset angle as a horizontal offset angle of the shutter glasses relative to a vertical center surface of the display device;

performing horizontal positioning of the shutter glasses relative to the display device according to the horizontal offset angle;

playing, by the display device, a plurality of 3D image sets with different visual angles at a specific frequency;

transmitting, by the detecting module, a synchronization signal corresponding to the horizontal offset angle to the shutter glasses; and

controlling a switching frequency of the shutter glasses according to the synchronization signal so as to make the shutter glasses capable of receiving one of the plurality of 3D image sets corresponding to the horizontal offset angle.

2. The method of claim 1 further comprising:

utilizing a third infrared detecting device disposed at another position of the vertical center axis of the display device to detect a third distance between the third infrared detecting device and the shutter glasses; and

calculating a second offset angle of the visual angle according to the first distance, the third distance, a distance between the first infrared detecting device and the third infrared detecting device, and the cosine law;

wherein the second offset angle is substantially equal to a complementary angle of a vertical offset angle of the shutter glasses relative to a horizontal surface of the display device.

3. The method of claim 1, wherein playing, by the display device, the plurality of 3D image sets with different visual angles at the specific frequency comprises:

playing, by the display device, the plurality of 3D image sets with different visual angles at a frequency of 120 Hz.

4. An image processing system for playing a corresponding 3D image according to different visual angles, the image processing system comprising:

a display device for playing a plurality of 3D image sets at a specific frequency;

a shutter glasses located at a position corresponding to a visual angle included between the display device and the shutter glasses, the shutter glasses used for receiving one of the plurality of 3D image sets corresponding to the visual angle; and

a detecting module coupled to the display device and the shutter glasses, the detecting module comprising;

a first infrared detecting device disposed at a vertical center axis of the display device, the first infrared detecting device used for detecting a first distance between the first infrared detecting device and the shutter glasses;

a second infrared detecting device disposed on the display device and disposed at the same horizontal axis with the first infrared device, the second infrared detecting device used for detecting a second distance between the second infrared detecting device and the shutter glasses; and

a processing unit coupled to the first infrared detecting device and the second infrared detecting device, for calculating a first offset angle of the visual angle according to the first distance, the second distance, a distance between the first and second infrared detecting devices, and the cosine law without coordinate calculation, the first offset angle being an angle between the shutter glasses not located at a horizontal surface where the first and second infrared detecting devices are located and a horizontal axis relative to the first infrared detecting device, the processing unit being further for setting the first offset angle as an offset angle between a vertical projection position of the shutter glasses on the horizontal surface and the horizontal axis relative to the first infrared detecting device, setting an complementary angle of the offset angle as a horizontal offset angle of the shutter glasses relative to a vertical center surface of the display device, performing horizontal positioning of the shutter glasses according to the horizontal offset angle, and controlling the first infrared detecting device to transmit a synchronization signal corresponding to the horizontal offset angle to the shutter glasses so as to control a switching frequency of the shutter glasses.

5. The image processing system of claim 4, wherein the detecting module further comprises:

a third infrared detecting device disposed at another position of the vertical center axis of the display device and coupled to the processing unit, the third infrared detecting unit used for detecting a third distance between the third infrared detecting device and the shutter glasses;

wherein the processing unit calculates a second offset angle of the visual angle according to the first distance, the third distance, a distance between the first infrared detecting device and the third infrared detecting device, and the cosine law, and the second offset angle is substantially equal to a complementary of a vertical offset angle of the shutter glasses relative to a horizontal surface of the display device.

6. The image processing system of claim 4, wherein the shutter glasses is an infrared shutter glasses.

7. The image processing system of claim 4, wherein the specific frequency is 120 Hz.

8. The image processing system of claim 4, wherein the display device is a liquid crystal display device.