IMAGE REPRODUCING APPARATUS, PROJECTOR, IMAGE REPRODUCING SYSTEM, AND INFORMATION STORING MEDIUM

• US 20020039097A1
• Filed: 07/07/1998
• Published: 04/04/2002
• Est. Priority Date: 11/07/1996
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: FUJIWARA, SHUICHI
• Granted Patent: US 6,483,502 B2
• Time in Patent Office: Days
• 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 which can surely reproduce pictures by automatically setting the optimum sampling parameter based on inputted analog video signals. The projector stores data for discrimination formed by weighting and grouping different display modes by using the horizontal and vertical scanning data of the analog video signals and polarity data of synchronizing signals in a ROM (52), detects the horizontal and vertical scanning data of the analog video signals and polarity data of synchronizing signals by means of a discriminating condition detecting section (60), and discriminates the display mode of the inputted analog video signals based on the detected results of the detecting section (60) and the grouped data for automatic binding.

Claims

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

automatic determination means for automatically determining a display mode from said analog image signals; and

image data generating means, wherein sampling parameters for sampling and reproducing input analog image signals in accordance with display pixels are set for each display mode, and said image data generating means samples said analog image signals in accordance with display pixels, based on the sampling parameters corresponding to the determined display mode;

wherein said automatic determination means comprises;

storing means for storing determination data which has been formed by weighting and grouping each display mode using horizontal scanning data of the analog image signals, vertical scanning data of the analog image signals, and polarity data of synchronous signals;

determination condition detecting means for detecting said input horizontal scanning data and vertical scanning data of the input analog image signals, and the polarity data of the synchronous signals; and

determination means for determining the display mode of said analog image signals input from said grouped determination data, using at least one of said detected horizontal scanning data and vertical scanning data of the analog image signals, and the synchronous signals.

2. An image reproducing apparatus according to claim 1, wherein said determination data for said display mode is 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, wherein said determination data for said display mode is 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 any of the claims 1 through 3, wherein said sampling parameters include 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 any of the claims 1 through 4, wherein said image data generating means samples 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 any of the claims 1 through 5.

7. An image reproducing system, comprising:

a computer device for outputting analog image signals; and

an image reproducing apparatus according to any of the claims 1 through 6, for sampling input analog image signals according to said display pixels of a liquid crystal display, liquid crystal shutter or plasma display, based on usage environment data, and reproducing the input analog image signals.

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

information for automatically determining a display mode from said analog image signals; and

information for sampling and generating image data, wherein sampling parameters for sampling and reproducing the analog image signals in accordance with display pixels are set for each display mode, and said analog image signals are scanned and image data is reproduced in accordance with display pixels, based on the sampling parameters corresponding with the determined display mode;

wherein said information for automatically determining comprises;

information for determining data which has been formed by weighting and grouping each display mode using horizontal scanning data of the analog image signals, vertical scanning data of the analog image signals, and polarity data of synchronous signals;

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

information for determining the display mode of said analog image signals input from said grouped determination data, using at least one of said detected horizontal scanning data of the analog image signals, vertical scanning data of the analog image signals, and the synchronous signals.

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

the vertical scanning data;

the horizontal scanning data; and

said polarity data.