Method and apparatus for displaying images

• US 6,362,853 B1
• Filed: 09/14/1999
• Issued: 03/26/2002
• Est. Priority Date: 09/05/1997
• Status: Expired due to Term

• Current Assignee: Saturn Licensing LLC (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Irie, Motosuke, Yamashita, Hiroshi, Suzuki, Satoru, Ouchiyama, Motoki
• Primary Examiner(s): Lee, Michael
• Application Number:
  US09/297,449
• Time in Patent Office: 924 Days
• Field of Search: H04/N.546, 348/558, 348/554, 348/555, 348/556, 348/551, 348/704, 348/445, 348/449, 345/718, 345/10, 345/11, 345/667, 345/698, 345/764, 345/699
• US Class Current: 348/556
• CPC Class Codes: G09G 1/16 the pattern of rectangular co-ordinates extending over the whole area of the screen, i.e. television type raster
• CPC Class Codes: G09G 1/167 Details of the interface to the display terminal specific for a CRT details suitable for both CRT and flat panel G09G5/006, specific for a flat panel G09G3/2096
• CPC Class Codes: G09G 2340/0442 Handling or displaying different aspect ratios, or changing the aspect ratio
• CPC Class Codes: H04N 21/4113 PC
• CPC Class Codes: H04N 21/440272 for performing aspect ratio conversion
• CPC Class Codes: H04N 5/46 for receiving on more than one standard at will deflecting circuits of multi-standard receivers H04N3/27

Abstract

To provide a method and device for picture display capable of performing suitable picture display corresponding to various video signals. Kind of an input video signal S1 is determined based on prestored characteristic information on video signals, and the input video signal S1 is displayed in picture according to the characteristic information based on the above determined result, so that a suitable displayed picture can be obtained corresponding to the input video signal 1.

Claims

1. A method for picture display, comprising:

a first step of determining kind of an input video signal based on prestored characteristic information on video signals; and

a second step of performing deflection control based on said determined result; and

the method wherein the aspect ratio of said input video signal is maintained, and at least one direction of a display picture is displayed over the whole of one direction of the displayable region of a display means.

2. The method for picture display according to claim 1, wherein said first step determines the aspect ratio of said input video signal based on said characteristic information.

3. The method for picture display according to claim 2, wherein said characteristic information is the number of horizontal lines and horizontal synchronizing frequency of said input video signal.

4. The method for picture display according to claim 3, further including:

a third step of detecting the horizontal synchronizing frequency and vertical synchronizing frequency of said input video signal; and

a fourth step of computing the number of lines from said detected horizontal synchronizing frequency and vertical synchronizing frequency; and

said method wherein the aspect ratio of said input video signal is determined based on said computed number of lines, said detected horizontal synchronizing frequency and said prestored characteristic information.

5. The method for picture display according to claim 2, further including:

a fifth step of prestoring related data on a deflection parameter and a value relevant to a display size;

a sixth step of storing a value relevant to the display size when at least one direction of the display picture is displayed over the whole of one direction of the displayable region of the display means with respect to video signals having plural aspect ratios;

a seventh step of reading out a value relevant to said stored display size corresponding to said determined aspect ratio; and

an eighth step of computing said stored relevant data and a deflection parameter based on said read-out data.

6. The method for picture display according to claim 5, wherein:

in said first step, a horizontal deflection parameter and related data on the ratio of an active ratio to an actual horizontal display size are prestored;

in said sixth step, a horizontal display size when the horizontal direction of the display picture is displayed over the whole of the horizontal direction of the displayable region of the display means is stored with respect to the video signals having plural aspect ratios;

in said seventh step, said stored horizontal display size corresponding to the determined aspect ratio is read out; and

in said eighth step, a deflection parameter is computed based on said stored related data and said read-out horizontal display size.

7. The method for picture display according to claim 6, wherein said active ratio is the ratio of the period of an effective video signal to one horizontal period.

12. The picture display device according to claim 2, wherein said storage means further stores related data on a deflection parameter and a value relevant to a display size, and prestores a value relevant to a display size when at least one direction of the display picture is displayed over the whole of one direction of the displayable region of the display means with respect to the video signals having plural aspect ratios, and

the picture display device further including:

a readout means for reading out said stored value relevant to the display size and said related data corresponding to said determined aspect ratio; and

a second computing means for computing the deflection parameter based on said read-out related data and said read-out value.

13. The picture display device according to claim 12, wherein:

said storage means prestores the relationship between the horizontal deflection parameter and the ratio of an active ratio to the actual horizontal display size, and also prestores a horizontal display size when the horizontal direction of the display picture is displayed over the whole of the horizontal direction of the displayable region of the display means with respect to the video signals having the plural aspect ratios;

said readout means reads out said stored horizontal display size corresponding to said determined aspect ratio; and

said second computing means computes the deflection parameter based on said stored related data and said read-out horizontal display size.

14. The picture display device according to claim 13, wherein said active ratio is the ratio of the period of an effective video signal to one horizontal periods.

8. A picture display device, comprising:

a storage means for prestoring the characteristic information on a video signal;

a detection means for detecting the horizontal and vertical synchronizing frequencies of the input video signal;

a determination means for determining kind of said input video signal based on said detected horizontal and vertical synchronizing frequencies and said stored characteristic information; and

a control means for controlling a deflecting circuit based on said determined result; and

the picture display device wherein the aspect ratio of said input video signal is maintained, and at least one direction of a display picture is displayed over the whole of one direction of the displayable region of a display means.

9. The picture display device according to claim 8, wherein said determination means determines the aspect ratio of said input video signal based on said characteristic information.

10. The picture display device according to claim 9, wherein said characteristic information is the number of horizontal lines and horizontal synchronizing frequency of said input video signal.

11. The picture display device according to claim 10, including;

a first computing means for computing the number of lines from said detected horizontal synchronizing frequency and vertical synchronizing frequency; and

the picture display device wherein the aspect ratio of said input video signal is determined based on said computed number of lines, said detected horizontal synchronizing frequency and said stored characteristic information.