JP2013037318A - Image display system, image display device, image output device, and image display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display system having a great browsing property of an image even when resolutions are different between an image output device and an image display device.SOLUTION: An image display system 1 includes an image output device 2 for outputting image information, and an image display device 3 for displaying an image on the basis of the image information that is output from the image output device 2. The image display device 3 includes display means 31 for displaying an image, resolution detection means 324 for detecting a resolution of the image information that is input from the image output device 2, magnification setting means 321A for setting a display magnification of an image to be displayed on the display means 31 on the basis of the resolution, and display control means 321D for causing the display means 31 to display an image in which a predetermined area of the image based on the image information is enlarged on the basis of the display magnification.

Description

  The present invention relates to an image display system, an image display device, an image output device, and an image display method.

Conventionally, an image display device such as a projector is connected to an image output device such as a PC (Personal Computer), and image information (information representing a video generated by the PC) is output from the PC to the projector. The structure which displays is known (for example, refer patent document 1).
In the projector described in Patent Document 1, the image generated by the PC is adjusted to the resolution of the liquid crystal display panel mounted on the projector so that the image fills the screen of the liquid crystal display panel. The whole is displayed.

JP 2007-58234 A

In recent years, since high-definition PCs have become widespread, when images output from the high-definition PCs are displayed on a full screen with a projector, characters may be displayed in a manner that is difficult to see finely.
In such a case, it has been necessary to make adjustments each time the user operates the display magnification on the PC side to enlarge it, or reduces the resolution on the PC side to make it easy to see.
Even if the video resolution is changed in accordance with the resolution of the device as in Patent Document 1, when the image data input from the high resolution PC is displayed by the low resolution projector, the image data is reduced and displayed. As a result, it is difficult to see characters and the like, and the viewability is impaired.

  An object of the present invention is to provide an image display system, an image display device, an image output device, and an image display method that are excellent in image browsing even when the image output device and the image display device have different resolutions.

  The image display system of the present invention is an image display system including an image output device that outputs image information, and an image display device that displays an image based on the image information output from the image output device, The image display device includes a display unit that displays an image, a resolution detection unit that detects a resolution of the image information input from the image output device, and a display magnification of an image that is displayed on the display unit based on the resolution. And a display control means for displaying on the display means an image obtained by enlarging a predetermined area of the image based on the image information based on the display magnification.

Hereinafter, for convenience of explanation, an image based on image information output from the image output apparatus is described as an entire image.
In the present invention, the image display device includes the display unit, the resolution detection unit, the magnification setting unit, and the display control unit described above. When image information is output from the image output device, the following image is displayed on the display unit. Will be displayed.
That is, when the resolution of the image information detected by the resolution detection unit is higher than the resolution of the image display device (display unit), the magnification setting unit sets a display magnification larger than 1.
For example, when the resolution of the image information detected by the resolution detection means is 1600 × 1200 pixels (UXGA) and the resolution of the image display device is 1024 × 768 pixels (XGA), the magnification setting means The display magnification is set to approximately 1.5 times (the ratio of the vertical resolution of UXGA to the vertical resolution of XGA).
Then, the display control means causes the display means to display an image obtained by enlarging a predetermined area in the entire image based on the set display magnification.
Therefore, for example, even when the low-resolution image display device displays an image based on the image information output from the high-resolution image output device, the image display device displays the image enlarged to an easily viewable size. It can be displayed and can be viewed.

An image display device according to the present invention is an image display device that displays an image based on image information output from an image output device, the display means for displaying an image, and the image information input from the image output device. Resolution detection means for detecting resolution; magnification setting means for setting a display magnification of an image to be displayed on the display means based on the resolution; and a predetermined area of the image based on the image information based on the display magnification. And display control means for displaying an enlarged image on the display means.
In this invention, since it is an image display apparatus used for the image display system mentioned above, it can enjoy the effect | action and effect similar to the image display system mentioned above.

  The image display device according to the present invention further includes an input receiving unit that receives an input of position information related to a position of the predetermined region, and the display control unit includes the predetermined region of the position based on the position information in the image based on the image information. It is preferable to display an image obtained by enlarging the image on the display means.

In the present invention, for example, when the user inputs position information regarding the position of a predetermined area in the entire image by the input means (such as a remote controller or an operation panel provided in the image display device), the input receiving means Accept input of information.
Then, the display control means causes the display means to display an image obtained by enlarging a predetermined area of the position based on the position information in the entire image.
Thus, the user can move the position of the enlarged display area in the entire image by appropriately operating the input means.
Therefore, the entire image can be browsed to every corner by appropriately moving the position of the enlarged display area while displaying the image in an easy-to-view size, thereby improving user convenience. Can do.

  In the image display device of the present invention, the input receiving unit receives an input of magnification information relating to the display magnification, and the image display device uses the display magnification set by the magnification setting unit based on the magnification information. The display control means includes a magnification changing means for changing to a display magnification, and the display control means displays, on the display means, an image obtained by enlarging a predetermined area of the image based on the image information based on the display magnification changed by the magnification changing means. It is preferable to display.

In the present invention, for example, when the user inputs magnification information related to a display magnification at the time of enlargement display by the input device, the input reception unit receives the input of the magnification information.
The magnification changing unit changes the display magnification set by the magnification setting unit to a display magnification based on the magnification information.
Then, the display control means causes the display means to display an image obtained by enlarging a predetermined area in the entire image based on the changed display magnification.
Accordingly, the display magnification when the predetermined area in the entire image is enlarged and displayed can be changed by appropriately operating the input unit by the user.
Therefore, the image can be enlarged or reduced to an easily viewable size, and user convenience can be improved.

  The image display system of the present invention is an image display system including an image output device that outputs image information, and an image display device that displays an image based on the image information output from the image output device, The image output device includes a resolution detection unit that detects a resolution of the image display device, a magnification setting unit that sets a display magnification of an image to be displayed on the image display device based on the resolution, and a display magnification based on the display magnification. First control means for generating enlarged display image information for displaying an enlarged image on the image display device, and second control means for outputting the enlarged display image information to the image display device. It is characterized by providing.

In the present invention, the image output apparatus includes the resolution detection means, the magnification setting means, the first control means, and the second control means described above, and therefore outputs image information for enlarged display as shown below. An image can be displayed on the display device.
That is, when the resolution of the image display device detected by the resolution detection unit is lower than the resolution of the image output device (the resolution of the image information output from the image output device), the magnification setting unit displays a value larger than 1 time. Set to magnification.
For example, when the resolution of the image output device is UXGA and the resolution of the image display device is XGA, the magnification setting means sets the display magnification to approximately 1.5 times as described above.
Then, based on the set display magnification, for example, when the image output device is configured as a PC and the image displayed on the display of the PC is set as the entire image, the first control means In addition to setting a predetermined area, image information for enlarged display in which a portion other than the predetermined area is blanked is generated.
The second control means outputs the enlarged display image information to the image display device.
On the other hand, when the image display device receives the image information for enlargement display, the image display device grasps a predetermined region (region not in the blanking state) in the image based on the image information for enlargement display, and displays the image of the predetermined region. Is displayed on the full screen.
Therefore, for example, even when the low-resolution image display device displays an image based on the image information output from the high-resolution image output device, the image display device displays the image enlarged to an easily viewable size. It can be displayed and can be viewed.

An image output device of the present invention is an image output device that outputs image information to an image display device that displays an image based on image information, the resolution detecting means for detecting the resolution of the image display device, Magnification setting means for setting a display magnification of an image to be displayed on the image display device based on the resolution, and image information for enlarged display for displaying an enlarged image on the image display device based on the display magnification. It is characterized by comprising first control means for generating and second control means for outputting the image information for enlargement display to the image display device.
In this invention, since it is an image display apparatus used for the image display system mentioned above, it can enjoy the effect | action and effect similar to the image display system mentioned above.

An image display method according to the present invention uses an image display system including an image output device that outputs image information and an image display device that displays an image based on the image information output from the image output device. A display method, wherein the image display device detects a resolution of the image information input from the image output device, and an image that the image display device displays on the display unit based on the resolution. A magnification setting step for setting the display magnification of the image, and a display control step for causing the display means to display an image obtained by enlarging a predetermined area of the image based on the image information based on the display magnification. It is characterized by including.
In the present invention, since the image display method uses the above-described image display system, the same operations and effects as the above-described image display system can be enjoyed.

An image display method according to the present invention uses an image display system including an image output device that outputs image information and an image display device that displays an image based on the image information output from the image output device. A display method, wherein the image output device detects a resolution of the image display device, and a display magnification of an image to be displayed on the image display device based on the resolution. A magnification setting step to set; a first control step in which the image output device generates image information for enlarged display for displaying an enlarged image on the image display device based on the display magnification; and the image output. And a second control step of outputting the image information for enlarged display to the image display device.
In the present invention, since the image display method uses the above-described image display system, the same operations and effects as the above-described image display system can be enjoyed.

The figure which shows the structure of the projection system in 1st Embodiment. The block diagram which shows the structure of the projection system in 1st Embodiment. The flowchart explaining operation | movement of the projection system in 1st Embodiment. (A) is the schematic which shows the image displayed on the display of PC in 1st Embodiment, (B) is the schematic which shows the image displayed on the screen. The block diagram which shows the structure of the projector in 2nd Embodiment. The flowchart explaining operation | movement of the projection system in 2nd Embodiment.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
[First embodiment]
[Schematic configuration of the projection system]
FIG. 1 is a diagram illustrating a configuration of a projection system 1 according to the first embodiment.
As shown in FIG. 1, a projection system 1 as an image display system projects and displays a PC 2 that outputs an image signal (image information) and an image based on the image signal output from the PC 2 on a screen Sc that is a projection surface. The projector 3 includes an image cable 4 that connects the PC 2 and the projector 3 and transmits an image signal output from the PC 2 to the projector 3.

The image cable 4 is a cable connected to transmit an image signal, and is composed of an analog RGB (Red Green Blue) cable. The image signal is transmitted as an analog RGB signal.
The image cable 4 is not limited to an analog RGB cable, and may be composed of, for example, a composite cable or a digital RGB cable, and may be selected according to the transmitted image signal.
Further, as long as the PC 2 and the projector 3 can be connected so as to be able to transmit information, the network is not limited to the image cable 4 described above, and a network or the like that connects the PC 2 and the projector 3 by wire or wirelessly may be employed. .

[Configuration of PC]
As shown in FIG. 2, the PC 2 as an image output device is roughly configured by a display 21 and a control unit 22.
Further, the PC 2 has input means (not shown) such as a keyboard and a mouse operated by a user of the PC 2, for example.
The display 21 includes, for example, a liquid crystal panel and a backlight (not shown). The liquid crystal panel is a transmissive liquid crystal panel, and displays an image by changing the alignment of liquid crystal molecules sealed in the liquid crystal cell and transmitting or blocking light emitted from the backlight.

As shown in FIG. 2, the control unit 22 includes a main memory 222 such as a hard disk and a CPU (Central Processing Unit) 221 that executes a program stored in the main memory 222, an interface 223, an image processing unit 224, Is provided.
These components 221 to 224 are connected by a bus (not shown) so that necessary information can be transmitted.
The CPU 221 controls the entire PC 2 by executing a program stored in the main memory 222.

The main memory 222 stores programs executed by the CPU 221 and data used by the image processing unit 224.
For example, the main memory 222 stores background image data and character data such as characters and pictures as data used by the image processing unit 224.
The interface 223 converts the image data generated by the image processing unit 224 via the image cable 4 into an image signal and transmits the image signal via the image cable 4.
The interface 223 is configured to transmit information by using a display data channel command interface (DDC / CI).

The image processing means 224 is constituted by, for example, a GPU (Graphics Processor Unit), and performs image processing under the control of the CPU 221 and includes an image generation unit 224A and a video memory 224B (not shown). .
The image generation unit 224A generates frame-unit image data corresponding to one screen from the background image data and character data stored in the main memory 222, and stores this image data in the video memory 224B. The video memory 224B is a buffer that temporarily stores image data.
Then, the CPU 221 causes the display 21 to output the image data stored in the video memory 224B, and causes the display 21 to display an image based on the image data.
In addition, the CPU 221 transmits the image data stored in the video memory 224B via the interface 223.

[Configuration of projector]
As shown in FIG. 2, the projector 3 as an image display device includes a projector main body 30 and a remote controller (hereinafter referred to as a remote controller) 5 that remotely operates the projector main body 30.
The remote controller 5 has a plurality of keys, and transmits an operation signal corresponding to the input of the key by an infrared signal or the like. As such keys, a power key (not shown) for turning on / off the power of the projector main body 30, a scroll key 51 for scrolling an image, a magnification key 52 for changing a display magnification, and the like are provided. .
Note that the configuration is not limited to a remote control that operates the projector main body 30 with an infrared signal, but may be a remote control that operates the projector main body 30 with radio waves or the like.

As shown in FIG. 2, the projector main body 30 is roughly composed of an image projection unit 31 and a control unit 32.
The image projection means 31 as a display means forms an image based on the image data output from the control means 32 and projects it on the screen Sc. Thereby, an image based on the image data is displayed on the screen Sc.
As shown in FIG. 2, the image projection unit 31 includes a light source device 311, a light modulation device 312, and a projection optical device 313.

The light source device 311 emits light toward the light modulation device 312 and includes a light source lamp 314 and a lamp driver 315.
The light source lamp 314 is composed of an ultra high pressure mercury lamp. It should be noted that a discharge type light source lamp such as a metal halide lamp or a xenon lamp may be employed in addition to the ultra-high pressure mercury lamp. Furthermore, not only a discharge-type light source lamp but various self-light emitting elements such as a light emitting diode, a laser diode, an organic EL element, and a silicon light emitting element may be employed.
The lamp driver 315 drives the light source lamp 314 by applying a driving voltage based on a control signal from the control means 32.

The light modulation device 312 is a transmissive liquid crystal panel, and changes the arrangement of liquid crystal molecules enclosed in a liquid crystal cell (not shown) based on a drive signal from the control means 32 and is emitted from the light source lamp 314. The light is modulated according to the image data by transmitting or blocking.
The projection optical device 313 projects the light modulated by the light modulation device 312 toward the screen Sc and displays an image.

As shown in FIG. 2, the control unit 32 includes an interface 323, a resolution detection unit 324, an image processing unit 325, and a remote control reception unit 326 in addition to the CPU 321 and the main memory 322. These components 321 to 326 are connected by a bus (not shown) so that necessary information can be transmitted.
The remote control receiving unit 326 receives an infrared operation signal corresponding to the operation content of the user transmitted from the remote controller 5 and outputs the operation signal to the input receiving unit 321B.
The main memory 322 stores a program executed by the CPU 321 and the like.
Similarly to the interface 223 of the PC 2, the interface 323 receives the image signal transmitted from the PC 2 via the image cable 4 by using DDC / CI.

The resolution detection unit 324 detects the resolution of the PC 2 (display 21) based on the image signal received via the interface 323.
As this resolution detection means 324, for example, a frequency counter or the like can be exemplified, and the resolution of the PC 2 is detected from the frequency of the synchronization signal (horizontal synchronization signal) included in the image signal.
The image processing means 325 is constituted by a GPU or the like, for example, and is controlled by the CPU 321.
As shown in FIG. 2, the image processing unit 325A, an image adjustment unit 325B, and a video memory 325C are provided.
The image generation unit 325A samples the image signal received by the interface 323 and generates image data in units of frames.

The image adjustment unit 325B performs image processing (enlargement / reduction processing) on the image data generated by the image generation unit 325A under the control of the CPU 321, and stores the image data subjected to the image processing in the video memory 325C. . The video memory 325C is a buffer that temporarily stores image data.
The CPU 321 executes a program stored in the main memory 322, thereby functioning as a magnification setting unit 321A, an input receiving unit 321B, a magnification changing unit 321C, a display control unit 321D, and the like as illustrated in FIG.

The magnification setting unit 321A sets a display magnification for causing the image adjustment unit 325B to perform the enlargement / reduction processing based on the resolution of the PC 2 detected by the resolution detection unit 324.
The input receiving unit 321B acquires the operation signal output from the remote control receiving unit 326.
For example, the input receiving unit 321B acquires position information related to the position of the area to be enlarged and displayed when the user operates the scroll key 51.
Further, the input receiving unit 321B acquires magnification information related to the display magnification when the magnification key 52 is operated by the user.

The magnification changing unit 321C changes the display magnification set by the magnification setting unit 321A to the display magnification based on the magnification information when the magnification information is acquired by the input receiving unit 321B.
The display control unit 321D causes the image adjustment unit 325B to execute image processing based on the display magnification set by the magnification setting unit 321A or the display magnification changed by the magnification changing unit 321C and the position information. . The display control unit 321D performs image processing in the image adjustment unit 325B, causes the image projection unit 31 to output image data stored in the video memory 325C, and causes the image projection unit 31 to output an image based on the image data. Display.

[Projection system operation]
FIG. 3 is a flowchart for explaining the operation of the projection system 1.
FIG. 4 is a diagram for explaining the operation of the projection system 1. Specifically, FIG. 4A is a schematic diagram showing an image displayed on the display 21 of the PC 2. FIG. 4B is a schematic diagram showing an image displayed on the screen Sc.
Next, the operation of the projection system 1 will be described.
In FIG. 3, the PC 2 executes steps S1 and S2 in the left flowchart, and the projector 3 executes steps S3 to S11 in the right flowchart.
In the following, for convenience of explanation, a case where the resolution of the PC 2 is higher than the resolution of the projector 3 (light modulation device 312) will be described. When the resolution of the PC 2 is the same as the resolution of the projector 3 or lower than the resolution of the projector 3, a specific description is omitted, but the same processing as the conventional one is performed.

First, when the user of the PC 2 operates the input unit, the CPU 221 causes the image processing unit 224 to generate image data corresponding to the operation, and an image based on the generated image data is displayed in FIG. As shown in FIG. 2, the data is displayed on the display 21 (step S1).
Further, the CPU 221 transmits an image signal related to an image (image data stored in the video memory 224B) displayed on the display 21 via the interface 223 (step S2).

When the image signal is transmitted from the PC 2, the projector 3 receives the image signal via the interface 323 (step S3).
Further, the resolution detection means 324 detects the resolution of the PC 2 based on the received image signal (step S4: resolution detection step).
After step S4, the magnification setting unit 321A sets a display magnification for causing the image adjustment unit 325B to perform image processing (enlargement processing) based on the resolution of the PC 2 detected by the resolution detection unit 324 (step S5). : Magnification setting step).
For example, when the resolution of the PC 2 is UXGA and the resolution of the projector 3 is XGA, the magnification setting unit 321A sets the display magnification to approximately 1.5 times (the ratio of the vertical resolution of UXGA to the vertical resolution of XGA). Set. This display magnification represents the resolution of the PC 2 corresponding to the resolution of the image that can be displayed by the projector 3. In general, when the resolution of an input image differs from the resolution that can be displayed by the projector, the input image is converted to a resolution that can be displayed by the projector. To do. At this time, if the resolution of the input image is higher than the resolution that can be displayed by the projector, the resolution of the image is lowered when resolution conversion is performed on the image.

After step S5, the display control unit 321D causes the image adjustment unit 325B to perform enlargement processing based on the display magnification set by the magnification setting unit 321A (step S6: display control step).
Specifically, the display control unit 321D causes the image adjustment unit 325B to perform enlargement processing to generate the image data shown below, and stores the image data in the video memory 325C.
In the following (in the first embodiment), an image based on image data in units of frames generated by the image generation unit 325A based on an image signal transmitted from the PC 2 (an image displayed on the display 21) is an entire image. It describes as.
The display control unit 321D extracts a predetermined area in the entire image based on the display magnification set by the magnification setting unit 321A, and generates image data obtained by enlarging the predetermined area with the display magnification in the image adjustment unit 325B. Let

Normally (when the scroll key 51 is not operated), the predetermined area is a rectangular area including the upper left corner of the entire image. The vertical length and horizontal length of the predetermined area are set to 1 / display magnification with respect to the vertical length and horizontal length of the entire image, respectively.
For example, when the display magnification is set to 1.5 times, the display control unit 321D includes the upper left corner portion in the entire image, and 2/3 each of the vertical length and the horizontal length of the entire image. The predetermined area having the vertical length and the horizontal length is extracted, and image data obtained by enlarging the predetermined area by 1.5 times is generated in the image adjustment unit 325B.

Then, the display control means 321D causes the image projection means 31 to output the image data stored in the video memory 325C. Thereby, the image projection means 31 displays the image shown in FIG. 4B on the screen Sc (step S7: display control step).
Through steps S1 to S7 as described above, the image displayed on the display 21 is displayed on the screen Sc in an easily viewable size.

Next, an operation when the remote controller 5 is operated on the image displayed on the screen Sc will be described.
When the image of the predetermined area is enlarged and displayed on the screen Sc as described above, only a part of the entire image displayed on the display 21 can be browsed. When browsing an area other than the predetermined area, the user operates the scroll key 51 of the remote controller 5.
When the user operates the scroll key 51 and the position information is acquired by the input receiving unit 321B (step S8), the display control unit 321D changes the position of the predetermined area to a position based on the position information. (Step S9) In step S6, a predetermined area at a position based on the position information is extracted from the entire image, and image data obtained by enlarging the predetermined area is generated in the image adjustment unit 325B.

Further, in order to change the display magnification of the image displayed on the screen Sc, the user operates the magnification key 52 of the remote controller 5.
When the magnification key 52 is operated by the user and the magnification information is acquired by the input receiving unit 321B (step S10), the magnification changing unit 321C uses the display magnification set in step S5 as the magnification information. The display magnification is changed to the base display magnification (step S11).
Then, the display control means 321D executes the process of step S6 based on the display magnification changed in step S11.

The first embodiment described above has the following effects.
In the present embodiment, the projector 3 includes an image projection unit 31, a resolution detection unit 324, a magnification setting unit 321A, and a display control unit 321D. Based on the display magnification according to the resolution of the PC 2, a predetermined area in the entire image is provided. An enlarged image is displayed.
As a result, even when the low-resolution projector 3 displays an image based on the image signal transmitted from the high-resolution PC 2, the projector 3 can display an image enlarged to an easily viewable size. Can be improved.

In addition, the projector 3 includes an input receiving unit 321 </ b> B that acquires position information regarding the position of the image displayed by the image projecting unit 31 in response to an operation of the scroll key 51 by the user. Then, the display control unit 321D causes the image projection unit 31 to display an image obtained by enlarging a predetermined region at a position based on the position information in the entire image.
Thus, the user can move the position of the enlarged display area in the entire image by appropriately operating the scroll key 51.
Therefore, the entire image can be browsed to every corner by appropriately moving the position of the enlarged display area while displaying the image in an easy-to-view size, thereby improving user convenience. Can do.

Further, the input receiving unit 321B acquires magnification information regarding the display magnification in response to an operation of the magnification key 52 by the user. Further, the projector 3 includes a magnification changing unit 321C that changes the display magnification set by the magnification setting unit 321A to a display magnification based on the magnification information. Then, the display control unit 321D causes the image projection unit 31 to display an image obtained by enlarging a predetermined area in the entire image based on the changed display magnification.
As a result, the user can appropriately change the display magnification when the predetermined area in the entire image is enlarged and displayed by operating the magnification key 52.
Therefore, the image can be enlarged or reduced to an easily viewable size, and user convenience can be improved.

[Second Embodiment]
Next, 2nd Embodiment of this invention is described based on drawing.
In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
In the first embodiment, in the projection system 1, the projector 3 is the main body, and an image enlarged to an easily viewable size is displayed on the screen Sc based on the resolution of the PC 2.
On the other hand, in the present embodiment, in the projection system 1, the PC 2 detects the resolution of the projector 3, and based on the resolution, enlarges the screen to an easily viewable size and displays it on the projector 3. Send an image signal. Then, the projector 3 displays an image enlarged to an easy-to-see size on the screen Sc based on the image signal for enlarged display.

FIG. 5 is a diagram showing a configuration of the projection system 1 according to the second embodiment.
Specifically, as shown in FIG. 5, the image processing means 224 of the PC 2 in the second embodiment includes a first video memory 224C, an image adjustment unit 224D, an image generation unit 224A described in the first embodiment, And a second video memory 224E.
The first video memory 224C is a part that stores image data to be displayed on the display 21, and stores image data in units of frames generated by the image generation unit 224A. The first video memory 224C is a buffer that temporarily stores image data.
Then, the CPU 221 causes the display 21 to output the image data stored in the first video memory 224C, and causes the display 21 to display an image based on the image data.

  The image adjustment unit 224 </ b> D performs image processing on the image data stored in the first video memory 224 </ b> C under the control of the CPU 221, and generates enlarged display image data to be transmitted to the projector 3. Then, the image adjustment unit 224D stores the image data for enlarged display in the second video memory 224E. The second video memory 224E is a buffer that temporarily stores image data.

Further, the CPU 221 of the PC 2 in the second embodiment is provided with a part of the functions of the projector 3 described in the first embodiment.
Specifically, the CPU 221 includes a resolution detection unit 221A, a magnification setting unit 221B, a first control unit 221C, and a second control unit 221D.
Here, the main memory 322 of the projector 3 stores EDID (Extended Display Identification Data) of the light modulation device 312 in addition to the program and data described in the first embodiment.
The EDID is data relating to display-specific characteristics such as the manufacturer name and model, in addition to the corresponding frequency and resolution.
Then, the resolution detection unit 221A acquires the EDID stored in the main memory 322 using the DDC line of the image cable 4 via the interface 223, and detects the resolution of the projector 3 based on the EDID.

The magnification setting unit 221B sets a display magnification used when the image adjustment unit 224D generates image data for enlarged display based on the resolution of the projector 3 detected by the resolution detection unit 221A.
The magnification setting unit 221B sets the ratio of the vertical resolution of its own PC 2 to the vertical resolution of the projector 3 as the display magnification, similarly to the magnification setting unit 321A described in the first embodiment.

The first control unit 221C causes the image adjustment unit 224D to execute image processing based on the display magnification set by the magnification setting unit 221B.
The second control unit 221D performs image processing in the image adjustment unit 224D, and transmits image data for enlargement display stored in the second video memory 224E via the interface 223.
In the projector 3, as shown in FIG. 5, functions such as the magnification setting means 321A, the input reception means 321B, the magnification change means 321C, and the display control means 321D in the CPU 221 and the resolution detection means 324 are omitted. .

Next, the operation of the projection system 1 of the second embodiment will be described.
FIG. 6 is a flowchart for explaining the operation of the projection system 1 in the second embodiment.
In FIG. 6, the PC 2 executes steps S21 to S25 in the left flowchart, and the projector 3 executes steps S26 to S28 in the right flowchart.
Hereinafter, as in the first embodiment, a case where the resolution of the PC 2 is higher than the resolution of the projector 3 will be described. When the resolution of the PC 2 is the same as the resolution of the projector 3 or lower than the resolution of the projector 3, a specific description is omitted, but the same processing as the conventional one is performed.

First, when the user of the PC 2 operates the input unit, the CPU 221 causes the image processing unit 224 to generate image data corresponding to the operation and causes the display 21 to display an image based on the generated image data ( Step S21).
Further, the resolution detection unit 221A acquires the EDID stored in the main memory 322 of the projector 3 via the interface 223, and detects the resolution of the projector 3 based on the EDID (step S22: resolution detection step).
After step S22, the magnification setting unit 221B sets a display magnification used when the image adjustment unit 224D generates image data for enlarged display based on the resolution of the projector 3 detected by the resolution detection unit 221A. (Step S23: Magnification setting step).

After step S23, the first control unit 221C causes the image adjustment unit 224D to generate image data for enlarged display based on the display magnification set by the magnification setting unit 221B, and performs the enlargement display. Display image data is stored in the second video memory 224E (step S24: first control step).
In the following (in the second embodiment), an image based on the image data stored in the first video memory 224C (an image displayed on the display 21) is described as an entire image.
The first control unit 221C specifies a predetermined area in the entire image based on the display magnification set by the magnification setting unit 221B, and sets the image data (for enlarged display) in the blanking state other than the predetermined area. The image adjustment unit 224D generates the image data.
The predetermined area is a rectangular area including the upper left corner of the entire image. The vertical length and horizontal length of the predetermined area are set to 1 / display magnification with respect to the vertical length and horizontal length of the entire image, respectively.
After step S24, the second controller 221D transmits the enlarged display image data (enlarged display image signal) stored in the second video memory 224E via the interface 223 (step S25: second). Control step).

When an image signal for enlarged display is transmitted from the PC 2, the projector 3 receives the image signal via the interface 323 (step S26).
After step S26, the CPU 321 causes the image adjustment unit 325B to perform image processing (step S27).
The image adjustment unit 325B in the second embodiment identifies an area (the predetermined area) that is not in the blanking state in the entire image based on the image data (enlarged display image data) generated by the image generation unit 325A. To do. Then, the image adjustment unit 325B performs an enlargement process so that the image data in the area matches the resolution of the projector 3, and stores the image data subjected to the process in the video memory 325C.
Then, the CPU 321 causes the image projection unit 31 to output the image data stored in the video memory 325C. As a result, the image projecting means 31 displays an enlarged image on the screen Sc in an easily viewable size (step S28).

  Even when the PC 2 is mainly used to detect the resolution of the projector 3 and transmit an image signal for enlargement display based on the resolution to the projector 3 as in the second embodiment described above, The same effect as the first embodiment can be enjoyed.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
In each of the above embodiments, the magnification setting means 321A and 221B set the ratio of the vertical resolution of the PC 2 to the vertical resolution of the projector 3 as the display magnification. However, the present invention is not limited to this.
For example, in the first embodiment, the magnification setting unit 321A may be configured to uniformly set a preset display magnification when the resolution of the PC 2 is higher than the resolution of the projector 3. For example, when the resolution of the projector 3 is XGA, the display magnification may be uniformly set to approximately 1.5 times regardless of whether the resolution of the PC 2 is UXGA or SXGA. .

  In the second embodiment, the CPU 221 may have the functions of the input receiving unit 321B and the magnification changing unit 321C described in the first embodiment. That is, as in the first embodiment, the CPU 221 changes the position of the area to be enlarged and the display magnification at the time of enlarged display according to the operation of the input means of the PC 2 by the user. May be adopted.

In each of the above embodiments, the PC 2 is employed as the image output device according to the present invention. However, the present invention is not limited to this, and other devices such as a DVD (Digital Versatile Disk) player may be used as long as image information can be output. May be adopted.
In each of the above embodiments, the projector 3 is employed as the image display device according to the present invention. However, the present invention is not limited thereto, and any other device, for example, an image display device that displays an image based on image information, for example, A liquid crystal display, plasma television, organic EL (Electro Luminescence), etc. may be adopted.
In each of the above embodiments, the light modulation device 312 is configured with a transmissive liquid crystal panel, but is not limited thereto, and may be configured with a reflective liquid crystal panel, or a device using a micromirror, etc. You may employ | adopt light modulation apparatuses other than a liquid crystal.

  DESCRIPTION OF SYMBOLS 1 ... Projection system (image display system), 2 ... PC (image output device), 3 ... Projector (image display device), 31 ... Image projection means (display means), 221A, 324 ..Resolution detection means, 221B, 321A, magnification setting means, 221C, first control means, 221D, second control means, 321B, input reception means, 321C, magnification change means, 321D: Display control means, S4, S22: Resolution detection step, S5, S23: Magnification setting step, S6, S7: Display control step, S24: First control step, S25,. Second control step.

Claims (8)

An image display system comprising: an image output device that outputs image information; and an image display device that displays an image based on the image information output from the image output device,
The image display device includes:
Display means for displaying an image;
Resolution detection means for detecting the resolution of the image information input from the image output device;
A magnification setting means for setting a display magnification of an image to be displayed on the display means based on the resolution;
An image display system comprising: display control means for causing the display means to display an image obtained by enlarging a predetermined area of the image based on the image information based on the display magnification. An image display device that displays an image based on image information output from an image output device,
Display means for displaying an image;
Resolution detection means for detecting the resolution of the image information input from the image output device;
A magnification setting means for setting a display magnification of an image to be displayed on the display means based on the resolution;
An image display apparatus comprising: a display control unit that causes the display unit to display an image obtained by enlarging a predetermined area of the image based on the image information based on the display magnification. The image display device according to claim 2,
An input receiving means for receiving position information regarding the position of the predetermined area;
The display control means includes
In the image based on the image information, an image obtained by enlarging the predetermined area at a position based on the position information is displayed on the display means. In the image display device according to claim 2 or 3,
The input receiving means
Accepting input of magnification information regarding the display magnification,
The image display device
A magnification changing means for changing the display magnification set by the magnification setting means to a display magnification based on the magnification information;
The display control means includes
An image display device, wherein an image obtained by enlarging a predetermined area of an image based on the image information is displayed on the display unit based on the display magnification changed by the magnification change unit. An image display system comprising: an image output device that outputs image information; and an image display device that displays an image based on the image information output from the image output device,
The image output device includes:
Resolution detection means for detecting the resolution of the image display device;
A magnification setting means for setting a display magnification of an image to be displayed on the image display device based on the resolution;
First control means for generating image information for enlarged display for displaying an enlarged image on the image display device based on the display magnification;
An image display system comprising: second control means for outputting the image information for enlargement display to the image display device. An image output device that outputs image information to an image display device that displays an image based on the image information,
Resolution detection means for detecting the resolution of the image display device;
A magnification setting means for setting a display magnification of an image to be displayed on the image display device based on the resolution;
First control means for generating image information for enlarged display for displaying an enlarged image on the image display device based on the display magnification;
An image output device comprising: second control means for outputting the image information for enlargement display to the image display device. An image display method using an image display system comprising: an image output device that outputs image information; and an image display device that displays an image based on the image information output from the image output device,
A resolution detection step in which the image display device detects the resolution of the image information input from the image output device;
A magnification setting step in which the image display device sets a display magnification of an image to be displayed on a display unit based on the resolution;
A display control step for causing the display unit to display an image obtained by enlarging a predetermined area of the image based on the image information based on the display magnification;
An image display method comprising: An image display method using an image display system comprising: an image output device that outputs image information; and an image display device that displays an image based on the image information output from the image output device,
A resolution detection step in which the image output device detects the resolution of the image display device;
A magnification setting step in which the image output device sets a display magnification of an image to be displayed on the image display device based on the resolution;
A first control step in which the image output device generates image information for enlarged display for causing the image display device to display an enlarged image based on the display magnification;
A second control step in which the image output device outputs the image information for enlarged display to the image display device;
An image display method comprising:

Images