Image reproducing apparatus, projector, image reproducing system, and information storing medium

• US 6,483,502 B2
• Filed: 07/07/1998
• Issued: 11/19/2002
• Est. Priority Date: 11/07/1996
• Status: Expired due to Term

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Fujiwara, Shuichi
• Primary Examiner(s): Saras, Steven
• Assistant Examiner(s): AWAD, AMR A
• Application Number:
  US09/101,328
• Publication Number:
  US 20020039097A1
• Time in Patent Office: 1,596 Days
• Field of Search: 345/213, 345/99, 345/132, 345/96, 345/3, 345/190, 345/204-212, 345/698, 345/699, 345/3.1, 345/3.2, 345/3.3, 345/3.4, 348/537, 348/790, 348/792
• US Class Current: 345/213
• CPC Class Codes: G09G 2360/02 Graphics controller able to handle multiple formats, e.g. input or output formats
• CPC Class Codes: G09G 3/001 using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background slide projectors per se G03B23/00 = 42 HP
• CPC Class Codes: G09G 5/005 Adapting incoming signals to the display format of the display terminal
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04

Abstract

A liquid crystal projector is provided which automatically sets optimal sample parameters based on input analog image signals, capable of accurately performing image reproduction. The liquid crystal projector stores judging data formed by weighting and grouping the display modes using horizontal scanning data of analog image signals, vertical scanning data, and synchronizing signal polarity data. Then, the input horizontal scanning data, vertical scanning data, and synchronizing signal polarity data are detected by a judging condition detecting unit, and the display mode of the input analog image signals is automatically identified based on these detection results and the grouped judging data. Then, the sampling parameters are automatically set, based on the judging results.

Claims

1. An image reproducing apparatus which samples and reproduces input image signals in accordance with display pixels, said image reproducing apparatus comprising:

storing means for storing determination data formed by weighting and grouping a plurality of display modes using horizontal scanning data of the image signals, vertical scanning data of the image signals, and polarity data of synchronous signals;

a determination condition detecting unit that detects said horizontal scanning data and vertical scanning data of the input image signals, and the polarity data of the synchronous signals;

determination means for determining the display mode, from the plurality of display modes, of said image signals input from said determination data, using at least one of said detected horizontal scanning data and vertical scanning data of the image signals, and the polarity data of the synchronous signals; and

image data generating means, sampling parameters for sampling and reproducing input image signals in accordance with display pixels being set for each display mode, and said image data generating mans sampling said image signals in accordance with display pixels based on the sampling parameters corresponding to the determined display mode.

2. An image reproducing apparatus according to claim 1, said determination data for said display mode being formed by weighting and grouping in an order of:

one of the horizontal scanning data and the vertical scanning data;

another of the horizontal scanning data and the vertical scanning data; and

said polarity data.

3. An image reproducing apparatus according to claim 2, said determination data for said display mode being formed by weighting and grouping in an order of:

the vertical scanning data;

the horizontal scanning data; and

said polarity data.

4. An image reproducing apparatus according to claim 1, said sampling parameters including a timing control sampling parameter for determining a timing for performing sampling of input analog image signals according to display pixels.

5. An image reproducing apparatus according to claim 1, said image data generating means for sampling input analog image signals according to said display pixels of a liquid crystal display, liquid crystal shutter or plasma display, based on said sampling parameters.

6. A liquid crystal projector which samples input analog image signals according to said display pixels of a liquid crystal shutter based on said sampling parameters and reproduces the input analog image signals as a projector image, using an image reproducing apparatus according to claim 1.

7. An image reproducing system, comprising:

a computer device for outputting image signals; and

an image reproducing apparatus that samples and reproduces input image signals in accordance with display pixels, said image reproducing apparatus comprising;

storing means for storing determination data formed by weighting and grouping a plurality of display modes using horizontal scanning data of the image signals, vertical scanning data of the image signals, and polarity data of synchronous signals,

a determination condition detecting unit that detects said horizontal scanning data and vertical scanning data of the input image signals, and the polarity data of the synchronous signals;

determination means for determining the display mode, from the plurality of display modes, of said image signals input from said determination data, using at least one of said detected horizontal scanning data and vertical scanning data of the image signals, and the polarity data of the synchronous signals; and

image data generating means, sampling parameters for sampling and reproducing input image signals in accordance with display pixels being set for each display mode, and said image data generating means sampling said image signals in accordance with display pixels based on the sampling parameters corresponding to the determined display mode.

11. An image reproducing system according to claim 7, said determination data for said display mode being formed by weighting and grouping in an order of:

one of the horizontal scanning data and the vertical scanning data;

another of the horizontal scanning data and the vertical scanning data; and

said polarity data.

12. An image reproducing system according to claim 11, said determination data for said display mode being formed by weighting and grouping in an order of:

the vertical scanning data;

the horizontal scanning data; and

said polarity data.

13. An image reproducing system according to claim 7, said sampling parameters including a timing control sampling parameter for determining a timing for performing sampling of input analog image signals according to display pixels.

14. An image reproducing system according to claim 7, said image data generating means sampling input analog image signals according to said display pixels of a liquid crystal display, liquid crystal shutter or plasma display, based on said sampling parameters.

8. An information storing medium for an image reproducing apparatus which samples and reproduces input image signals in accordance with display pixels, said information storing medium including:

instructions for determining data formed by weighting and grouping a plurality of display modes using horizontal scanning data of the image signals, vertical scanning data of the image signals, and polarity data of synchronous signals;

instructions for detecting said horizontal scanning data and vertical scanning data of the image signals, and the polarity data of the synchronous signals;

instructions for determining the display mode, from the plurality of display modes, of said image signals input from said determination data, using at least one of said detected horizontal scanning data of the image signals, vertical scaning data of the image signals, and the polarity data of the synchronous signals; and

instructions for sampling and generating image data, sampling parameters for sampling and reproducing the image signals in accordance with display pixels being set for each display mode, and said image signals being scanned and image data being reproduced in accordance with display pixels, based on the sampling parameters corresponding with the determined display mode.

9. An information storing medium according to claim 8, said determination data for said display mode being formed by weighting and grouping in an order of:

one of the horizontal scanning data and the vertical scanning data;

another of the horizontal scanning data and vertical scanning data; and

said polarity data.

10. An information storing medium according to claim 9, said determination data for said display mode being formed by weighting and grouping in an order of:

the vertical scanning data;

the horizontal scanning data; and

said polarity data.

15. An image reproducing method for sampling and reproducing input image signals in accordance with display pixels, said image reproducing method comprising:

storing determination data formed by weighting and grouping a plurality of display modes using horizontal scanning data of the image signals, vertical scanning data of the image signals, and polarity data of synchronous signals;

detecting said horizontal scanning data and vertical scanning data of the input image signals, and the polarity data of the synchronous signals;

determination the display mode, from the plurality of display modes, of said image signals input from said determination data, using at least one of said detected horizontal scanning data and vertical scanning data of the image signals, and the polarity data of the synchronous signals; and

generating image data, sampling parameters for sampling and reproducing input image signals in accordance with display pixels being set for each display mode, and said image data generating step sampling said image signals in accordance with display pixels based on the sampling parameters corresponding to the determined display mode.

16. An image reproducing method according to claim 15, said determination data for said display mode being formed by weighting and grouping in an order of:

one of the horizontal scanning data and the vertical scanning data;

another of the horizontal scanning data and the vertical scanning data; and

said polarity data.

17. An image reproducing method according to claim 16, said determination data for said display mode being formed by weighting and grouping in an order of:

the vertical scanning data;

the horizontal scanning data; and

said polarity data.

18. An image reproducing method according to claim 15, said sampling parameters including a timing control sampling parameter for determining a timing for performing sampling of input analog image signals according to display pixels.

19. An image reproducing method according to claim 15, said image data generating step including inputting analog image signals according to said display pixels of a liquid crystal display, liquid crystal shutter or plasma display, based on said sampling parameters.

20. An image reproducing method, comprising:

outputting image signals;

storing determination data formed by weighting and grouping a plurality of display modes using horizontal scanning data of the image signals, vertical scanning data of the image signals, and polarity data of synchronous signals;

detecting said horizontal scanning data and vertical scanning data of the input image signals, and the polarity data of the synchronous signals;

determinaton the display mode, from the plurality of display modes, of said image signals input from said determination data, using at least one of said detected horizontal scanning data and vertical scanning data of the image signals, and the polarity data of the synchronous signals; and

generating image data, sampling parameters for sampling and reproducing input image signals in accordance with display pixels being set for each display mode, and said image data generating step sampling said image signals in accordance with display pixels based on the sampling parameters corresponding to the determined display mode.

21. An image reproducing apparatus, comprising:

storing means for storing data formed by grouping a plurality of display modes based on at least one of horizontal scanning data, vertical scanning data and polarity data of synchronous signals associated with respective display modes;

a determination condition detecting unit that detects horizontal scanning data, and vertical scanning data and polarity data of synchronous signals corresponding to input image signals;

determination means for determining a display mode, from the plurality of display modes, of the input image signals based on the data, using at least one of the horizontal scanning data, the vertical scanning data, and the polarity data of the synchronous signals corresponding to the input image signals; and

image data generation means for sampling the input image signals in accordance with display pixels based on sampling parameters corresponding to the determined display mode.

22. An image reproducing apparatus according to claim 21, each of the display modes being defined by a respective set of horizontal scanning time, horizontal scanning lines within a predetermined time period and polarity of the synchronous signals.

23. A projector comprising an image reproducing apparatus according to claim 21.