IMAGE DISPLAY APPARATUS

• US 20100118184A1
• Filed: 11/11/2009
• Published: 05/13/2010
• Est. Priority Date: 11/12/2008
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Yokoyama, Toshihiko
• Granted Patent: US 8,446,529 B2
• Time in Patent Office: Days
• US Class Current: 348/441
• CPC Class Codes: G09G 2340/02 Handling of images in compressed format, e.g. JPEG, MPEG
• CPC Class Codes: G09G 2340/0414 Vertical resolution change
• CPC Class Codes: G09G 2340/0421 Horizontal resolution change
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• 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 5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T
• CPC Class Codes: H04N 21/4122 additional display device, e.g. video projector digital output for controlling a plurality of local displays G06F3/1423
• CPC Class Codes: H04N 21/440272 for performing aspect ratio conversion
• CPC Class Codes: H04N 21/8153 comprising still images, e.g. texture, background image
• CPC Class Codes: H04N 5/46 for receiving on more than one standard at will deflecting circuits of multi-standard receivers H04N3/27

Abstract

The image display apparatus is capable of receiving a first video signal and image data. The apparatus includes a first electronic zoom processing part performing first electronic zoom processing on the first video signal to output a first electronic zoom processed video signal of a predetermined resolution, a video converting part converting the image data into a second video signal, a second electronic zoom processing part performing second electronic zoom processing on the second video signal to output a second electronic zoom processed video signal of the predetermined resolution, and a displaying part displaying an image corresponding to each of the first and second electronic zoom processed video signals. The second electronic zoom processed video signal output from the second electronic zoom processing part is input to the displaying part through the first electronic zoom processing part without being subjected to the first electronic zoom processing.

Claims

1. An image display apparatus capable of receiving a first video signal and image data that is not a video signal, the apparatus comprising:

a first electronic zoom processing part configured to perform first electronic zoom processing on the first video signal to output a first electronic zoom processed video signal of a predetermined resolution;

a video converting part configured to convert the image data into a second video signal;

a second electronic zoom processing part configured to perform second electronic zoom processing on the second video signal from the video converting part to output a second electronic zoom processed video signal of the predetermined resolution; and

a displaying part configured to display an image corresponding to each of the first electronic zoom processed video signal output from the first electronic zoom processing part and the second electronic zoom processed video signal output from the second electronic zoom processing part,

wherein the second electronic zoom processed video signal output from the second electronic zoom processing part is input to the displaying part through the first electronic zoom processing part without being subjected to the first electronic zoom processing.

2. An image display apparatus according to claim 1,

wherein the second video signal input from the video converting part to the second electronic zoom processing part has a resolution higher than that of the first video signal.

3. An image display apparatus according to claim 1,

wherein the image data input to the video converting part is compressed image data, and

wherein the video converting part decompresses the compressed image data to convert the decompressed image data into the second video signal.

4. An image display apparatus according to claim 1,

wherein each of the first and second electronic zoom processing includes at least one of overscan processing and aspect ratio transformation processing.

5. An image display apparatus according to claim 1,

wherein the apparatus includes a projection optical system projecting the image displayed in the displaying part onto a projection surface.

6. An image display apparatus capable of receiving a first video signal and a second electronic zoom processed video signal of a predetermined resolution output from an image input apparatus, the image input apparatus including a video converting part configured to convert image data into a second video signal and a second electronic zoom processing part configured to perform second electronic zoom processing on the second video signal from the video converting part to output the second electronic zoom processed video signal, the image display apparatus comprising:

a first electronic zoom processing part configured to perform first electronic zoom processing on the first video signal to output a first electronic zoom processed video signal of the predetermined resolution; and

a displaying part configured to display an image corresponding to each of the first electronic zoom processed video signal output from the first electronic zoom processing part and the second electronic zoom processed video signal output from the second electronic zoom processing part,

wherein the second electronic zoom processed video signal output from the second electronic zoom processing part is input to the displaying part through the first electronic zoom processing part without being subjected to the first electronic zoom processing.

7. An image input apparatus capable of outputting a video signal to an image display apparatus, the image display apparatus being capable of receiving a first video signal and image data that is not a video signal, the image input apparatus comprising:

a video converting part configured to convert the image data into a second video signal; and

a second electronic zoom processing part configured to perform second electronic zoom processing on the second video signal from the video converting part to output a second electronic zoom processed video signal of a predetermined resolution,

wherein the image input apparatus outputs the second electronic zoom processed video signal to the image display apparatus, and

wherein the image display apparatus comprises;

a first electronic zoom processing part configured to perform first electronic zoom processing on the first video signal to output a first electronic zoom processed video signal of the predetermined resolution; and

a displaying part configured to display an image corresponding to each of the first electronic zoom processed video signal output from the first electronic zoom processing part and the second electronic zoom processed video signal output from the second electronic zoom processing part,

wherein the second electronic zoom processed video signal output from the second electronic zoom processing part is input to the displaying part through the first electronic zoom processing part without being subjected to the first electronic zoom processing.

8. A signal processing method in an image display apparatus capable of receiving a first video signal and image data that is not a video signal, the apparatus including a first electronic zoom processing part, a video converting part, a second electronic zoom processing part and a displaying part, the method comprising the steps of:

causing the first electronic zoom processing part to perform first electronic zoom processing on the first video signal to generate a first electronic zoom processed video signal of a predetermined resolution;

causing the video converting part to convert the image data into a second video signal;

causing the second electronic zoom processing part to perform second electronic zoom processing on the second video signal from the video converting part to generate a second electronic zoom processed video signal of the predetermined resolution; and

causing the displaying part to display an image corresponding to each of the first electronic zoom processed video signal output from the first electronic zoom processing part and the second electronic zoom processed video signal output from the second electronic zoom processing part,

wherein the second electronic zoom processed video signal output from the second electronic zoom processing part is input to the displaying part through the first electronic zoom processing part without being subjected to the first electronic zoom processing.