JP2003224788A - High-definition image display and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable display on a high-definition projector which can not be displayed by one existing video port by using a plurality of the existing video cards or ports. <P>SOLUTION: This high-definition image display receives image data to be generated and outputted via a dual-head type video card which is mounted on a host device 1 such as a PC via two or more video input interfaces 21, 22, respectively, plots the image data in an image memory 23 provided for display on a large screen, reads the image data plotted in the image memory 23 and outputs the image data to the high-definition projector 3 via a video output interface 24. In addition, high-definition display in accordance with the maximum number of connected projectors is realized by projecting images to each area in charge on a screen by each projector. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes a plurality of projectors, each of which is suitable for use in a display system which displays a large image by projecting an image on each area in charge on the screen. The present invention relates to an image display device and a method thereof.

[0002]

2. Description of the Related Art There is known a technique in which a plurality of projectors are provided, and each of the projectors projects an image in its own area on the screen to display one large image on the screen as a whole. The technique described above is disclosed in, for example, Japanese Patent Laid-Open Nos.
-222381, JP-A-6-222382, JP-A-7-239504, JP-A-9-326981, JP-A-2000-350230, JP-A-2001-13646.
No. 6, which is disclosed in each publication.

According to these techniques, an image to be projected on a screen is subjected to processing such as geometrical processing, brightness and color tone based on parameters adjusted for each projector in advance, and the processing result is supplied to the projector. By doing so, the image is expressed on the screen as geometrically, smoothly connected in terms of brightness and color tone, and gives a natural appearance.

[0004]

However, according to the above-mentioned conventional technique, each projector has 3200 × 2 pixels.
QUXGA (Quod Ultr) with a resolution of 400 pixels
a eXtended Graphics Arra) or QXGA Wide (Quod eXtended Graphics Arra) with a resolution of 3840 x 2400 pixels, which is wider than that of QUXGA.
y Wide) etc., it is necessary to use an ultra-high-definition video card, and it is also necessary to provide a special display mechanism, so the system configuration must be expensive. Furthermore, there is a restriction that the projectors that project images on the screen must be of the same model, and none of them can handle higher definition than the video output of a PC and a refresh rate or higher.

The present invention has been made in view of the above circumstances, and uses a plurality of existing video cards or ports to enable display on a high-definition projector that cannot be displayed with one existing video port. An object is to provide a fine image display device. In addition, a plurality of existing video cards or ports and a plurality of existing projectors are used to display a higher definition image, and a higher resolution image is displayed even if the existing projectors have different resolutions or light sources. It is also an object of the present invention to provide a high-definition image display device that enables the above.

[0006]

A high-definition image display device according to claim 1 receives image data generated by a host device through two or more video input interfaces and draws the image data in an image memory. Image drawing control means,
Image display control means for reading the image data drawn in the image memory and outputting the image data to the projector via the video output interface. Here, the “high-definition image display device” means 3200 ×
QUXGA (Quod Ul with resolution of 2400 pixels
tra eXtended Graphics Array), or QUXG
QXGA Wide (Quod eXtended Graphics) with a resolution of 3840 x 2400 pixels, which is wider than A
Array Wide) An image display device capable of displaying such as.

According to a second aspect of the present invention, in the high-definition image display device according to the first aspect, one or more video controllers mounted on the AGP bus and one or more video controllers mounted on the PCI bus are provided. It is characterized by being formed.

According to a third aspect of the present invention, there is provided a high-definition image display device comprising a plurality of projectors, each of the projectors projecting an image on a corresponding area on the screen to display a large image. Image drawing control means for receiving the image data generated by the higher-level device via two or more video input interfaces and drawing the image data in the image memory, and reading the image data drawn in the image memory for use in the video output interface. Image display control means for outputting to a projector respectively provided correspondingly.

According to a fourth aspect of the present invention, in the high-definition image display apparatus according to the third aspect, the image drawing control means includes one or more line buffers, and the line buffer corresponds to half of the display raster. Data is alternately drawn, and the image display control means reads out image data corresponding to one display raster from the line buffer and supplies the image data to the projector via the video output interface. .

According to a fifth aspect of the present invention, in the high-definition image display device according to the third or fourth aspect, resampling processing is performed in units of the line buffers to perform tilt correction.

According to a sixth aspect of the present invention, in the high-definition image display device according to any one of the third to fifth aspects, a general-purpose serial interface is used and the one video output and one projector are used. It is characterized in that the display is controlled to be switched between a normal mode for displaying using a screen and a large screen mode using a plurality of video outputs and a plurality of projectors.

The invention according to claim 7 is the invention according to claim 3, 4,
In the high-definition image display device according to any one of 6 above, a higher-level device obtains an image input from an external imaging device through a video input interface that it has, performs a tilt correction, and supplies the image drawing control means. What to do is characterized.

According to an eighth aspect of the present invention, there is provided a high-definition image display method in an image display device, which comprises a plurality of projectors, each projector projecting an image on its own area on the screen to display a large image. That is, a step of projecting and capturing an image of all white for each projector and obtaining an average of the values for each of R, G, and B, and a white balance from the obtained minimum value of the average values of R, G, and B. Setting the R, G, B values of the white pixels so that they are within the allowable value of, and displaying the gray scale for each of the projectors to capture an image, and obtaining the R, G, B values of the obtained gray scale. And a step of determining a gamma correction value so that a gray balance can be obtained.

According to a ninth aspect of the present invention, a high-definition image display is provided in an image display device, which comprises one or more projectors, each projector projecting an image on its own area on the screen to display a large image. A method of projecting all white for each projector, capturing an image, and obtaining the variance of the values for each of R, G, and B;
shading correction is performed using the minimum value excluding the pixel having a small value outside the range of σ as the corrected data.

According to a tenth aspect of the present invention, in the high-definition image display method according to the ninth aspect, shading correction is not performed when the variance value when capturing all white is smaller than the threshold value, and when the variance value is larger than the threshold value. It is characterized by performing shading correction.

[0016]

1 is a block diagram showing an embodiment of a high-definition image display device according to the present invention. Figure 1
In FIG. 1, 1 is a higher-level device such as a PC, 2 is a high-definition large-screen adapter, and 3 is a high-definition or ultra-high-definition projector (hereinafter referred to as the high-definition projector 3). Dual head type video card 11 mounted on the host device 1
Is normally used to display two displays, but here, it is equipped with two VGA (Video Graphics Array),
Each VGA is responsible for drawing a part of the screen to display a large screen, and outputs it to an adapter (high-definition large-screen adapter 2) that is a special interface for high-definition large-screen display. QUXGA wide (3840x that cannot be displayed on the PC interface)
It operates as an interface for high-definition or ultra-high-definition large screen display such as 2400 pixels).

Therefore, the high-definition large-screen adapter 2 is
Image drawing control means for receiving the image data generated by the higher-level device 1 such as a PC via the two video input interfaces (VGA) 21 and 22, and drawing the image data in the image memory 23 for displaying a large screen. The image display control means for reading out the image data drawn in the image memory 23 via one video output interface (VGA) 24 and outputting it to the high definition projector 3 is built in. A high-level device 1 such as a PC that generates display data for a high-definition large screen
Needs to prepare a device driver or an application program and divide the generated display data into two video interfaces for output.

FIG. 2 is a block diagram showing another embodiment of the high-definition image display device according to the present invention. 2, blocks designated by the same numbers as the blocks shown in FIG. 1 are the same as those shown in FIG. Here, the image memory 23
Instead of, the line buffers 25 and 26 are provided corresponding to the video input interfaces 21 and 22, respectively, and the data corresponding to half of the display raster are alternately drawn in the line buffers 25 and 26, respectively.
4 reads out image data corresponding to one display raster from the line buffers 25 and 26, and the high definition projector 3
Is being supplied to. With the above configuration, if both display raster data are output as a large-screen raster together, the large-capacity image memory 23 becomes unnecessary, and the line buffers 25, 26 having a comparatively small capacity. It can be used as an interface for large screen display only.

At this time, the refresh rate on the input side needs to be the same as the refresh rate on the output side, but the refresh rate of the high-definition projector 3 is not so high.
Since it is about Hz, there is no particular problem. As shown in FIG. 2, two line buffers 25 and 26 that can be switched by toggle from the output side are provided with separate line buffers 25 and 26 on the input side and the output side so that they can be written separately for each video input. If the access is controlled, the output side can obtain the information delayed by one line from the input side.

FIG. 3 shows still another embodiment of the present invention. In FIG. 3, blocks designated by the same numbers as the blocks shown in FIGS. 1 and 2 are the same as those shown in FIG.
Here, an AGP (Advanced
Graphics Port) video card 12 and PCI (Peripher)
al Interconnect Interface) Video card 13 is mounted. As shown in FIG. 3, the outputs of the AGP video card 12 and the PCI video card 13 are received by the high-definition large screen adapter 2, and the respective video input interfaces 21 and 22 are in charge of drawing a part of the large screen. By drawing on the image memory 23 and outputting to one video output interface 24 (VGA), it can be operated as a large screen interface. This makes it possible to input three or more video outputs, and it is also possible to arbitrarily divide the drawing area according to the capabilities of the video card.

On the other hand, when the above-mentioned high-definition display device is applied to a large-screen display system having a plurality of projectors, each projector projecting an image on its own area on the screen to display a large image, In particular, "flare", "luminance", and "hue" vary at the joints. Further, when projectors of different models are used, color problems occur due to differences in resolution and light source. “Arritation correction” is disclosed in Japanese Patent Application Laid-Open No. 2001-38543 filed on Feb. 15, 2001 by the same applicant as the present application, but here also, a mesh is projected by the same method and the image is captured. By doing so, the "slipping correction" is performed by grasping the slanting state.

"Arritation correction" by the resampling method
It is well known that the density conversion can be performed, and the tilt correction can be automatically performed by acquiring the tilt state from the captured image. In image capturing, it is sufficient to capture a range larger than the projection range of all projectors with about 640 × 480 pixels. The highest accuracy is obtained by capturing the projected image from the viewing direction, but since the mesh is projected, the viewing direction may be approximately the same. When a plurality of projectors are used, the tilt correction may be performed for each projector.

FIG. 4 shows the range that can be output as a rectangle after each “a tilt correction” is performed. Here, a case where the screen is divided into four and projected by respective projectors is illustrated. Here, what can be displayed as a whole is within the range shown by hatching in FIG. In addition, an area in which adjacent projectors overlap with each other is generated, but the area in charge is set so as not to overlap.
It is possible to obtain the area-divided image shown in FIG. 4 by projecting the image in white or the like by all the projectors after performing the “tilt correction” and capturing the image. If the maximum inscribed rectangle is obtained for this image, the position shown by hatching in FIG. 5A can be obtained.

The outside of the hatched portion can be masked by outputting black, but there is an overlapping portion between adjacent projectors. Since the brightness is high in the overlapping portions, it is possible to easily determine. It is also possible to project with adjacent projectors so that the colors are different and to judge by the colors. For example, four projectors A to
If A of red is projected with red and projector B is projected with green, the overlapped portion is colored from orange to yellow-green (yellow at the same level), which can be easily determined. If this area is assigned to a high-resolution projector, higher-definition display can be performed. Further, it is possible to assign a projector with a low resolution or divide the projector at the central portion. Since the image is actually divided according to the resolution of the image pickup, the projector with low definition may be in charge of a part of the area which can be displayed by the projector with high definition, though it is small. The projector that is no longer in charge masks this overlapping area by outputting black as well as the outside of the inscribed rectangle.

When projecting with four or more projectors, an overlapping portion of three or four projectors is generated, but even when four projectors are overlapped with each other, projection is performed with a level of white (gray) or the like at which the input of the image pickup system is not saturated. If you do,
As shown in (b), it is possible to determine the overlapping portion in terms of luminance, and the same applies to the case of color. In this case, the assigned area is assigned according to the resolution of each projector. If it is considered as the density conversion of the resampling mechanism, it becomes possible to display the data in the area in charge at the same time as the “tilt correction”.

FIG. 6 shows the concept of the output pixel space when there is no "orbit". As shown in FIG. 6, the smaller the mesh, the higher the definition. Although the resolutions of the areas covered by the respective projectors are different and the position of the output pixel is displaced, the overall state does not change due to the resampling. When there is "flapping", the output pixel position space of the area in charge is also deformed, but the output image can be an image without distortion by resampling. As explained above, there is no need to adjust the pixel position or zooming,
It is possible to automatically perform "tilt correction" and image display without misalignment just by adjusting the outline at the time of installation.

The flow of shading and gamma correction processing is shown in the flow chart of FIG. Shading correction is not particularly necessary when there is no extreme “fluttering” and there is little variation in uniformity between projectors. In the shading correction, as shown in FIG. 7, first, all white is displayed for each projector, an image is taken, and a variance value of the values is obtained for each of R, G, and B (S701), out of the range of 2σ. This is performed by creating a conversion table with the minimum value excluding pixels with small values as corrected data (S702 to S7).
04). Here, the coefficient of a pixel having a small value outside the range of 2σ is set to 1 (S704). By performing the processing as described above, it is possible to prevent the overall luminance from significantly decreasing due to the abnormal pixel. It should be noted that even if the same type of projector or different types of projectors are used, shading correction is not performed when the variation in uniformity is small, and otherwise, the above shading correction is performed to prevent further reduction in brightness. be able to.

In the gamma correction, first, all white is displayed for each projector, an image is taken, and the average value of the values is set to R, G, B.
It is calculated for each (S701). Next, the minimum value of the obtained average values of R and G is calculated (S705), and R, G, and B are set so that the values of R, G, and B are within the allowable value of the white balance (S706, S707). In addition, the R, G, B
A gray scale is displayed for each projector so that the value becomes white, and an image of the gray scale is taken. Using the obtained R, G, and B values (the average value of the patch), the gamma is adjusted so that the gray balance can be obtained. Create a correction table. Specifically, the output values to the projector, r, g, and b that can obtain the values of R, G, and B in the image pickup system are obtained for each projector, and the normal values are set so that r, g, and b are white. Turn into
The gamma correction value is determined so that the gray balance can be obtained by projecting for each projector (S708, S709). In this way, a correction value can be obtained for each grayscale patch, but a correction value within the range may be obtained according to the level, or a gamma correction curve is converted to the input value by processing such as spline interpolation. You may generate a table.

By the above processing, it is possible to display a substantially uniform gray balance. In addition,
When the type of light source is the same, for example, when the light sources of all projectors are high-pressure mercury lamps, the white balance tolerance is reduced. For example, when metal halide lamps and high-pressure mercury lamps are mixed, the type of light source is If is different, increase the allowable value of white balance. By doing so, it is possible to suppress the decrease in brightness to some extent. Also, when trying to match the hues, the colors are converted to the color space of the common part of the color space of the light source, and when different types of light sources are mixed, the color space becomes smaller and the decrease in brightness may increase. Need attention.

FIG. 8 and FIG. 9 show an embodiment of a high-definition image display device which eliminates the above-mentioned variations in "flapping", "luminance", and "hue". FIG. 8 shows the above-mentioned tilting in the ultra-high definition / large screen adapter 2 in which the present invention is mounted.
An example in which a gamma correction mechanism is incorporated is shown. Specifically, the gamma correction mechanism 28 is realized by reading and executing a program recorded in a memory also included in a CPU included in the high-definition large screen adapter 2. Will be realized. FIG. 9 shows an example in which the ultra high definition large screen adapter in which the present invention is mounted is built in one projector. That is, the projection mechanism 31 that the projector 31 conventionally has
1. In addition to the image input mechanism 312, the VGA input interfaces 211, 221, which the high-definition large screen adapter 2 has,
The image memory 23, the tilt / gamma correction mechanism 29, and the VGA output interfaces 242, 243 prepared for each of the projectors 32, 33, 34 connected to the other.
244 is added.

If the projector is placed horizontally and parallel to the screen, only vertical distortion (trapezoidal distortion) occurs. In this case, since the tilt correction can be realized by the interpolation processing by the line buffer, if the video signal can sequentially provide the display raster data to each projector, the large-capacity image memory 23 can be omitted. Further, the shading correction consumes a large amount of memory, and therefore there is no point in saving the image memory 23. However, the gamma correction can be realized by a line buffer because a memory having a small number of gradations can be used at most.

An example of the data flow is shown in FIG. Figure 10
In (a), data to be displayed is shown. In order to display data on a plurality of projectors 31, 32, 33, 34, it is necessary to make the refresh rate the same for each projector 31, 32, 33, 34. For that purpose, it is necessary to write data at the same time, so the video output of the host device 1 such as a PC is divided as shown in (b),
As shown in (c), it is stored in the image memory 23 for a large screen. Here, the four projectors have the same size for simplification, but if different, the projectors are stored in the large-screen image memory 23, and then subjected to the correction processing shown in FIG. 7 and output to each projector. .

Since a "projection" in the vertical direction occurs on the screen actually projected by the projector, when the screen is directed upward, it becomes as shown in (d). If one-dimensional resampling in the main scanning direction is performed, it is possible to form a square as shown in (e). When the vertical deformation is not a concern, the output may be performed in the state of (e). That is, the resampling may be performed in consideration of masking for processing overlapping portions. In this case, a one-line buffer is enough. In addition,
When the correction is also performed in the vertical direction, the correction may be performed as shown in (f). In the figure, the hatched area is a masked area (actually output as black), and the alternate long and short dash lines are areas that are not drawn because they overlap.

For resampling, it is sufficient to have two lines A and B, but if the difference between the number of actual scanning lines and the number of scanning lines to be drawn is ΔL, then there are four lines as shown in FIG. Display a large screen with projectors 31, 32, 33, 34,
When the refresh rate can be the same, the refresh rate of the video output of the host device 1 such as a PC is double that of the projector, and line synchronization can be achieved by the line buffer of ΔL + 1, so that the memory capacity is small. A large screen display without "tilt" is possible.

Normally, the host device 1 such as a PC is connected to a CRT or a liquid crystal display as a display monitor, and is rarely connected to a projector for presentation to a large number of people. Therefore, when connecting a special device such as this device, if the setting is such that a CRT or the like is connected, or if only a special application is supported, it may be difficult to set in the host device 1 such as a PC. It is possible. Therefore, when a normal output is configured for one projector with one video interface, the setting operation is performed in that state, and a special device driver or application that operates the n projectors is started. Switch to display using multiple video interfaces and multiple projectors.
USB (Universal Serial Bu
It is assumed that the general-purpose interface 50 that is standardly equipped in the PC as in s) is used to switch between the USB interface 30 built in the high-definition large screen adapter 2 and the display switching mechanism 40. In the high-definition large-screen adapter 2, when started, the video output interface 241 output is connected to the projector 31 to realize the normal display mode.
When a command is sent from the USB, the n projectors 31, 32, 33, 34 may be operated to perform control so as to execute the large screen display mode. The structure of a high-definition display device for this purpose is shown in FIG.

On the other hand, when the CPU performance of the host device such as a PC is high, the image pickup device 4 is attached to the host device 1 such as the PC without performing the correction processing by the high-definition large-screen adapter 2, and the above-described video driver or application program is used. Equivalent effects can be obtained by implementing a function that performs “tilt correction”, gamma correction, and shading correction. Here, the video driver 101 for tilt / gamma correction
It is shown. Some existing video cards have an NTSC or PAL compliant video input. With this, a VGA (640 x 480) still image can be input, so it is easy to obtain sufficient input for correction processing. be able to. The structure of a high-definition display device for this purpose is shown in FIG. In this case, the dual head type video card 100 with video input is mounted on the host device 1.

As described above, the present invention uses a plurality of existing video cards or ports and enables display on a high-definition projector that cannot be displayed by one existing video port. High-definition images can be displayed using a card or port and multiple existing projectors, and higher-definition images can be displayed even if the existing projectors have different resolutions or light sources. A display device is provided. Note that the flowchart shown in FIG. 7 is specifically implemented as a shading and gamma correction processing program in advance in the high-definition large-screen adapter 2 as firmware, or when the host device 1 such as a PC is a device driver or an application. It is implemented as a program.

[0038]

According to the first aspect of the present invention, image data generated by a higher-level device such as a PC is respectively received via two or more video input interfaces and drawn in the image memory to obtain the image memory. By reading out the image data drawn in and outputting it to the projector via the video output interface, the video output capability of the host device such as a PC is at least doubled. Therefore, the QXGA wide (3840) X2400)
It is possible to realize higher definition display such as.

According to the second aspect of the present invention, the host device such as a PC incorporates one or more video controllers mounted on the AGP bus and one or more video controllers mounted on the PCI bus. The video output capability of higher-level devices such as PCs is at least doubled, and higher-definition display such as QXGA wide (3840 x 2400) can be realized with an inexpensive video card, depending on the capability difference of the video card. Can be shared.

According to the third aspect of the present invention, each projector projects an image on each area in charge on the screen, so that high-definition display according to the maximum number of connected devices can be realized, and the resolution is unsatisfactory. You can effectively use the existing projector.

According to the invention described in claim 4, the data corresponding to half of the display raster is alternately drawn in one or more line buffers, and the image data corresponding to one display raster is read from the line buffers. To the projector via the video output interface,
A large-screen display image memory of the high-definition large-screen adapter is not required, and a low-cost high-definition image display device can be provided.

According to the fifth aspect of the present invention, by performing the tilt correction by the resampling process in units of line buffers, the image memory of the high definition large screen adapter becomes unnecessary, and the low cost high definition image display device is provided. Can be provided.

According to the sixth aspect of the present invention, a general-purpose serial interface is used, and a normal mode in which one video output and one projector are used for display and a plurality of video outputs and a plurality of projectors are used. Since the normal display and the large screen display can be controlled by switching the display in the large screen mode, it is possible to provide a high-definition image display device that can easily perform setting operation in a host device such as a PC. it can.

According to the seventh aspect of the present invention, the host device obtains an image input from the external image pickup device through the video input interface of its own, and performs the tilt correction,
The image input mechanism and the correction mechanism are not required in the high-definition large-screen adapter, and it is possible to provide a simpler low-cost high-definition image display device.

According to the invention described in claim 8, all white is projected and imaged for each projector, and the average of the values is R,
The R, G, B values of white pixels are set so that they are within the allowable white balance value from the minimum value of the average values of R, G, B obtained for each G, B, and the gray scale is set for each projector. Is displayed and imaged, and the obtained grayscale R,
By determining the gamma correction value so that the gray balance can be obtained by using the G and B values, the gamma correction is performed in consideration of the model difference between the projectors, and thus the gray balance that suppresses the decrease in the brightness as a whole is suppressed. High-definition large-screen display is possible.

According to the ninth aspect of the invention, all white is projected and imaged for each projector, and the variance of the values is set to R, G, and
For each B, the shading correction is performed by using the minimum value excluding the pixels having a variance value outside the range of 2σ and having a small value as the corrected data, so that the difference in the model between the projectors is taken into consideration and the abnormally low brightness is obtained. Since the shading correction is performed excluding the pixels, it is possible to perform uniform high-definition large-screen display while suppressing the decrease in brightness.

According to the tenth aspect of the present invention, the shading correction is not performed when the variance value when capturing all white is smaller than the threshold value, and the shading correction is performed when the variance value is larger than the threshold value. The shading correction is performed in consideration of the difference between the pixels and the pixel having an abnormally low luminance is removed, and a uniform high-definition large-screen display in which the luminance is further suppressed can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a high-definition image display device according to the present invention.

FIG. 2 is a block diagram showing another embodiment of the high-definition image display device according to the present invention.

FIG. 3 is a block diagram showing still another embodiment of the high-definition image display device according to the present invention.

FIG. 4 is a diagram quoted for explaining “flapping correction” by the high-definition image display device of the present invention.

FIG. 5 is a diagram quoted for explaining “flapping correction” by the high-definition image display device of the present invention.

FIG. 6 is a diagram cited to explain a concept of an output pixel space in the case where there is no “orientation”.

FIG. 7 is a flowchart showing the flow of shading and gamma correction processing by the high-definition image display device of the present invention.

FIG. 8 is a block diagram showing an embodiment of a high-definition image display device that eliminates variations in “orientation”, “luminance”, and “hue”.

FIG. 9 is a block diagram showing another embodiment of a high-definition image display device that eliminates variations in “orientation”, “luminance”, and “hue”.

FIG. 10 is a diagram showing a data flow quoted for explaining the operation of the embodiment shown in FIGS. 9 and 10;

FIG. 11 is a block diagram showing an embodiment of a high definition image display device capable of switching between a normal display mode and a large screen display mode.

FIG. 12 is a block diagram showing an embodiment of a high-definition image display device when the CPU performance of the host device is high.

[Explanation of symbols]

1 Host device 2 High definition large screen adapter 3 High definition projector 4 Imaging device 11 Dual head type video card 12 (13) Video card 21 (22) Video input interface 23 Image memory 24 Video output interface 25 (26) Line buffer 29 -Gamma correction mechanism 30 (50) USB interface 31 (32, 33, 34) Projector 40 Display switching mechanism 100 Dual head type video card 101 with video input Aori-Gamma correction compatible video driver 211 (221) VGA input interface 241 (242 243, 244) VGA output interface 311 Projection mechanism 312 Image input mechanism

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) G09G 5/00 G09G 5/00 550R 5/02 5/02 B H04N 9/73 H04N 9/73 B F term (reference) 5C058 BA13 BA23 BA25 BA27 BB11 BB14 EA02 EA03 EA26 5C066 AA03 CA08 CA10 EA07 EA15 EC03 EC05 ED01 GA01 GA21 KD02 KD07 KE05 KE07 KM01 KM13 5C080 CA07 DA86 BB22 DA53 BB02 DA53 BB02 DA53 BB02 AA23 CA25 ADA02 MM10

Claims (10)

[Claims] 1. An image drawing control means for respectively receiving image data generated by a higher-level device via two or more video input interfaces and drawing the image data in an image memory, and reading the image data drawn in the image memory. A high-definition image display device, comprising: an image display control unit that outputs the image to a projector through a video output interface. 2. The high-level controller according to claim 1, wherein the image drawing control means includes one or more video controllers mounted on an AGP bus and one or more video controllers mounted on a PCI bus. High-definition image display device. 3. A high-definition image display device comprising a plurality of projectors, each projector projecting an image on its own area on the screen to display a large image, the image being generated by a higher-level device. Image drawing control means for respectively receiving data via two or more video input interfaces and drawing in the image memory, and projectors provided corresponding to the video output interfaces for reading the image data drawn in the image memory. A high-definition image display device comprising: an image display control unit for outputting to. 4. The image drawing control means includes one or more line buffers, and alternately draws data corresponding to half of a display raster in the line buffers, and the image display control means outputs from the line buffers 1 The high-definition image display device according to claim 3, wherein image data corresponding to a display raster of a book is read out and supplied to the projector through the video output interface. 5. The high-definition image display device according to claim 3, wherein resampling processing is performed in units of the line buffer to perform tilt correction. 6. A general-purpose serial interface is used,
6. The display is controlled to be switched between a normal mode for displaying by using the one video output and one projector and a display in a large screen mode using a plurality of video outputs and a plurality of projectors. The high-definition image display device according to any one of 1. 7. The host device obtains an image input from an external image pickup device through a video input interface which the host device has, performs a tilt correction, and supplies the image input to the image drawing control means. 4. The high definition image display device according to any one of 4 and 6. 8. A high-definition image display method for an image display device, comprising a plurality of projectors, each projector projecting an image onto its own area on the screen to display a large image, the projector comprising: , A process of projecting and capturing all white and obtaining the average of the values for each R, G, B, and making sure that the obtained minimum value of the average values of R, G, B is within the allowable value of white balance. To set the R, G, and B values of the white pixel, and to display a gray scale for each of the projectors to capture an image, and to obtain the gray balance by using the obtained R, G, and B values of the gray scale. And a step of determining a gamma correction value, and a high-definition image display method. 9. A high-definition image display method for an image display device, comprising one or more projectors, each projector projecting an image onto its respective area on the screen to display a large image, the method comprising: A process of projecting an all-white image on the image and obtaining the variance of the values for each of R, G, and B; and shading with the minimum value excluding the pixel having a small variance value outside the range of 2σ as corrected data. A high-definition image display method comprising: a step of performing correction. 10. The high-definition image display method according to claim 9, wherein shading correction is not performed when the variance value when capturing all white is smaller than the threshold value, and shading correction is performed when the variance value is larger than the threshold value. .