JP6987348B2 - Projection type video display device - Google Patents

Description

The present invention relates to a projection type image display device.

As a projection type image display device, a device having a light source, a display element that incidents light generated by the light source, and a configurable light function that changes the amount of light incident on the display element is known. For example, in Patent Document 1, in a lighting device used for a projection type display device, a light source, a uniform lighting means for equalizing the illuminance distribution of light incident from the light source, and a tuning for adjusting the amount of light emitted from the light source. Devices with optical means are disclosed. Further, Patent Document 1 describes that the amount of light emitted from the uniform lighting means can be adjusted by controlling the dimming means based on information from the outside.

International Publication No. 03/032080

In the above-mentioned technology of the projection type video display device, for example, a plurality of projection type video display devices are provided, and images are projected on the display surface by a plurality of projection type video display devices, and one continuous input video is output as a whole. There is a usage pattern for projection, so-called multi-screen projection.

In such a usage mode in which a plurality of projection type image display devices are projected on multiple screens, the input images of the respective projection type image display devices are different. , It is necessary to improve the quality of the joint.

In the technique of Patent Document 1 described above, the amount of light emitted from the uniform lighting means can be adjusted by controlling the dimming means, but the control of the dimming means in the usage mode by multi-screen projection is provided. Is not considered.

An object of the present invention is to provide a projection type image display device for improving the quality of joints of projected images at the time of multi-screen projection.

The above and other objects and novel features of the invention will become apparent from the description and accompanying drawings herein.

As an embodiment of the present invention, it may be configured as described in the claims, for example.

Among the inventions disclosed in the present application, the effects obtained by representative ones will be briefly described as follows.

According to one embodiment, it is possible to provide a projection type image display device that improves the quality of the joints of the projected images at the time of multi-screen projection.

It is a block diagram which shows an example of the internal structure of the projection type image display device in one Embodiment of this invention. It is a figure for demonstrating an example of a multi-screen projection by "no overlap projection". It is a figure for demonstrating an example of a multi-screen projection by "overlapping projection". It is a figure for demonstrating the configuration example of the conventional multi-screen projection system. It is a figure for demonstrating the example of the multi-screen projection of [projection without superimposition + input image interlocking possible, no modulation light function]. It is a figure for demonstrating the problem of [projection without superposition + modulation | modulation light function interlocking with input image of prior art]. It is a figure for demonstrating the example of the multi-screen projection of [projection with overlap + possible interlocking with input image, and without modulation light function]. It is a figure for demonstrating the problem of [the projection with overlap + the input image interlocking possible modulation light function of the prior art]. It is a figure for demonstrating the operation concept of [projection without superposition + input image interlocking possible modulation light function of this embodiment]. It is a figure for demonstrating the operation concept of [the projection with overlap + the input image interlocking possible modulation light function of this embodiment]. It is a figure for demonstrating the structure of the basic example in one Embodiment of this invention. It is a figure for demonstrating the projection type image display device in the basic example in one Embodiment of this invention. It is a figure for demonstrating the menu screen in the basic example in one Embodiment of this invention. It is a figure for demonstrating the n-unit connection example in the basic example in one Embodiment of this invention. It is a figure for demonstrating the structure of the modification 1 in one Embodiment of this invention. It is a figure for demonstrating the projection type image display apparatus in the modification 1 in one Embodiment of this invention. It is a figure for demonstrating the menu screen in the modification 1 in one Embodiment of this invention. It is a figure for demonstrating the n-unit connection example in the modification 1 in one Embodiment of this invention. It is a figure for demonstrating the structure of the modification 2 in one Embodiment of this invention. It is a figure for demonstrating the projection type image display apparatus of the master in the modification 2 in one Embodiment of this invention. It is a figure for demonstrating an example of a data format in one Embodiment of this invention. It is a figure for demonstrating the slave projection type image display device in the modification 2 in one Embodiment of this invention. It is a figure for demonstrating the menu screen in the modification 2 in one Embodiment of this invention. It is a figure for demonstrating the n-unit connection example in the modification 2 in one Embodiment of this invention. It is a figure for demonstrating the structure of the modification 3 in one Embodiment of this invention. It is a figure for demonstrating the projection type image display apparatus of the master in the modification 3 in one Embodiment of this invention. It is a figure for demonstrating the slave projection type image display device in the modification 3 in one Embodiment of this invention. It is a figure for demonstrating the menu screen in the modification 3 in one Embodiment of this invention. It is a figure for demonstrating the n-unit connection example 1 in the modification 3 in one Embodiment of this invention. It is a figure for demonstrating the n-unit connection example 2 (daisy chain) in the modification 3 in one Embodiment of this invention. It is a figure for demonstrating the structure of the modification 4 in one Embodiment of this invention. It is a figure for demonstrating the projection type image display apparatus of the master in the modification 4 in one Embodiment of this invention. It is a figure for demonstrating the slave projection type image display device in the modification 4 in one Embodiment of this invention. It is a figure for demonstrating the menu screen in the modification 4 in one Embodiment of this invention. It is a figure for demonstrating the n-unit connection example 1 in the modification 4 in one Embodiment of this invention. It is a figure for demonstrating the n-unit connection example 2 (daisy chain) in the modification 4 in one Embodiment of this invention. It is a figure for demonstrating the structure of the non-volatile memory in the modification 7 in one Embodiment of this invention. It is a figure for demonstrating the control by the control part in the modification 7 in one Embodiment of this invention. It is a figure for demonstrating the combination example of the 1st control and the 2nd control in the modification 7 in one Embodiment of this invention. It is a figure for demonstrating the dimming characteristic of the variable diaphragm in the modification 7 in one Embodiment of this invention.

In the following embodiments, where necessary for convenience, the description will be divided into a plurality of sections or embodiments, but unless otherwise specified, they are not unrelated to each other, one of which is the other. It is related to some or all of the modified examples, details, supplementary explanations, etc. Further, in the following embodiments, when the number of elements (including the number, numerical value, quantity, range, etc.) is referred to, when it is specified in particular, or when it is clearly limited to a specific number in principle, etc. Except for this, the number is not limited to the specific number, and may be more than or less than the specific number.

Furthermore, in the following embodiments, the components (including element steps and the like) are not necessarily essential except when explicitly stated and when it is clearly considered to be essential in principle. Similarly, in the following embodiments, when the shape, positional relationship, etc. of a component or the like is referred to, the shape is substantially the same except when explicitly stated or when it is considered that it is not apparent in principle. It shall include things that are similar to or similar to. This also applies to the above numerical values and ranges.

Hereinafter, one embodiment will be described in detail with reference to the drawings. In addition, in each drawing for explaining one Embodiment, the same member is in principle the same reference numeral, and the repeated description thereof will be omitted.

[One embodiment]
The projection type video display device according to the embodiment will be described with reference to FIGS. 1 to 40.

<Projection type video display device>
The projection type video display device according to this embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing an example of the internal configuration of the projection type video display device 100 according to the present embodiment.

The projection type image display device 100 according to the present embodiment includes a projection optical system 101, a display element 102, a display element drive unit 103, an illumination optical system 104, a light source 105, a power supply 106, an operation input unit 107, a non-volatile memory 108, and a memory. It includes 109 and a control unit 110. Further, the projection type video display device 100 according to the present embodiment includes a cooling unit 115, a video signal input / output unit 131, a communication unit 132, an audio signal input / output unit 133, a speaker 140, an image adjustment unit 160, and an image adjustment unit 160. A storage unit 170 is provided. The illumination optical system 104 includes a variable diaphragm 120.

The light source 105 generates light for image projection, and uses a high-pressure mercury lamp, a xenon lamp, an LED light source, a laser light source, or a combination thereof. The power supply 106 converts an AC current input from the outside into a DC current and supplies electric power to the light source 105. Further, the power supply 106 supplies the required DC current to each of the other parts. The illumination optical system 104 collects the light generated by the light source 105, makes it more uniform, and irradiates the display element 102. The cooling unit 115 cools each part that becomes a high temperature state, such as the light source 105, the power supply 106, or the display element 102, by an air cooling method or a liquid cooling method as needed.

The display element 102 is an element that transmits or reflects light from the illumination optical system 104 and modulates the light to generate an image. For example, a transmissive liquid crystal panel, a reflective liquid crystal panel, or a DMD (Digital Micromirror Device). : Registered trademark) Use a panel or the like. The display element drive unit 103 sends a drive signal corresponding to the video signal to the display element 102.

The projection optical system 101 is a magnifying projection optical system that projects an image onto the display surface 200, and includes a lens and / or a mirror.

Here, the video signal referred to by the display element drive unit 103 may be an input video signal input from the outside via the video signal input unit / output unit 131, and the image adjustment unit 160 may obtain an image with respect to the input video signal. The adjusted video signal may be used, and a signal obtained by superimposing an OSD image signal generated by the control unit 110 on these video signals using an image stored in the non-volatile memory 108 or the storage unit 170 may be referred to. An optical image generated by modulation of light by the display element 102 according to a drive signal generated by the display element drive unit 103 with reference to these input video signals is displayed on the display surface 200 as a display image by the projection optical system 101. Be projected.

The operation input unit 107 is a light receiving unit for operation buttons and a remote controller, and inputs an operation signal from the user.

The speaker 140 can output voice based on the voice data input to the voice signal input unit / output unit 133. Further, the speaker 140 may output a built-in operation sound or an error warning sound.

Next, the interface 190 will be described. The interface 190 is an interface for connecting a projection type video display device 100 and an external device 400 (for example, a video / audio output / input device, an information processing device, or another projection type video display device) and transmitting / receiving various data between the two. be.

FIG. 1 shows an example in which the projection type video display device 100 has two interfaces 190A and an interface 190B as an interface 190, and is connected to an external device 400A and an external device 400B, respectively.

The video signal input / output unit 131A is a functional unit that constitutes a part of the interface 190A, and inputs video data to the projection type video display device 100 from the external device 400A connected by the interface 190A. It may have a function of outputting video data in the same interface. That is, the video signal input unit / output unit 131A functions as a separate or integrated functional unit, as a video input unit for inputting video, and as a video output unit for outputting video.

The voice signal input / output unit 133A inputs voice data from an external device (for example, a voice output / input device or an information processing device) 400A also connected by the interface 190A. It may have a function of outputting voice data in the same interface. That is, the voice signal input unit / output unit 133A functions as a voice input unit for inputting voice and as a voice output unit for outputting voice as a separate or integrated function unit.

The communication unit 132A inputs / outputs various control signals to and from the external device 400A which is also connected by the interface 190A.

As described above, the video signal input unit / output unit 131A, the audio signal input unit / output unit 133A, and the communication unit 132A are configured as the same interface 190A, but they may be configured as separate interfaces.

Configuration and processing of the video signal input unit / output unit 131B, audio signal input unit / output unit 133B, and communication unit 132B that also form a part of the interface 190B and the interface 190B that connect the projection type video display device 100 and the external device 400B. Since the configuration and processing of the video signal input unit / output unit 131A, the audio signal input unit / output unit 133A, and the communication unit 132A that form a part of the interface 190A and the interface 190A described above are the same, the description thereof is omitted. do. In this figure, an example is shown in which the projection type video display device 100 has two interfaces 190A and 190B as the interface 190, but it may be configured to have only one of them, and the same configuration may be used. It may have three or more interfaces having it. In that case, in addition to the interface 190A and the interface 190B, the number may be increased to the interface 190C, the interface 190D, ..., The interface 190N, as necessary for the design.

The non-volatile memory 108 stores various data used in the projector function. The memory 109 stores projected video data and device control data. The image data used to generate the GUI image may be stored. The control unit 110 controls the operation of each connected unit.

The image adjustment unit 160 performs image processing on the video data input by the video signal input unit / output unit 131. The image processing includes, for example, scaling processing for enlarging, reducing, and transforming an image, bright adjustment processing for changing brightness, contrast adjustment processing for changing the contrast curve of an image, and a gamma curve indicating gradation characteristics of an image. There are gamma adjustment processing to change, retinex processing to decompose the image into light components and change the weighting for each component.

The storage unit 170 records video, images, audio, various data, and the like. For example, video, image, audio, various data, etc. may be recorded in advance at the time of product shipment, and video, image, audio, various data, etc. acquired from an external device, an external server, etc. via the communication unit 132 may be recorded. You may record it. The video, image, various data, and the like recorded in the storage unit 170 may be output as a projected video via the display element 102 and the projection optical system 101. The voice recorded in the storage unit 170 may be output as voice from the speaker 140.

The variable diaphragm 120 is, for example, a mechanism provided with a movable light-shielding plate capable of light-shielding a part of the optical path of the illumination optical system 104, and is input to the video signal input unit / output unit 131 under the control of the control unit 110. Dimming value calculated based on the image (for example, shading rate and number of aperture steps) or dimming value calculated based on the control signal received from the communication unit 132 (for example, shading rate and number of aperture steps). The amount of light shielding is changed by changing (moving, rotating) the position and angle of the light shielding plate according to the above. The position and angle of the light-shielding plate may be changed by changing the input voltage value for the drive unit of the light-shielding plate or changing the number of pulses input to the drive unit of the light-shielding plate.

As described above, the projection type video display device 100 can be equipped with various functions.

<Modulated light function that can be linked with input video>
Next, the input image interlocking modulatorable optical function of the projection type image display device 100 shown in FIG. 1 will be described. The projection type image display device 100 has, for example, three means for changing the brightness of the projected image. The first is the display element 102. The second is a variable diaphragm 120, which realizes dimming by changing the amount of light shielding in the optical path of the above-mentioned illumination optical system 104. The third is a power supply 106 for a light source. The power supply 106 receives from the dimming value (for example, the light blocking rate and the number of aperture steps) calculated based on the image input to the video signal input unit / output unit 131 or the communication unit 132 under the control of the control unit 110. By changing the voltage for the light source according to the dimming value calculated based on the control signal (for example, the shading rate and the number of steps of the aperture), the brightness of the light source 105 is changed to realize dimming.

A function of controlling the amount of dimming in conjunction with the input video, a so-called "input video-linked configurable light function" (also simply referred to as a modulatorable light function) is required.

Therefore, the concept of the "input image interlocking configurable light function" in the present embodiment does not include the change in brightness of the projected image due to the light modulation by the display element 102. Of the dimming functions other than optical modulation by the display element 102 (for example, light-shielding dimming of the variable aperture 120 and voltage-modifiable light of the power supply 106 for the light source), the dimming amount is linked to the calculated value derived from the input image. The function to change the light source is included in the concept of "input video interlocking configurable light function". The function of realizing the light-shielding dimming of the variable aperture 120 is also referred to as a "variable iris function". The function of realizing the voltage-modulatory light of the power supply 106 for the light source is also referred to as a "lamp dimming function".

In this way, the dynamic range of the image can be expanded beyond the dynamic range of the optical modulation of the display element 102 by performing dimming by a function other than the optical modulation by the display element 102.

Further, a usage mode (by multi-screen projection) in which a plurality of projection type image display devices 100 are provided, images are projected on the display surface by a plurality of projection type image display devices 100, and one continuous input image is projected as a whole. There is a usage pattern). This multi-screen projection includes "non-overlapping projection" in which adjacent images are projected on the display surface so as not to overlap, and "overlapping projection" in which adjacent images are projected on the display surface so as to overlap. The concept of "non-overlapping projection" includes projections in which a plurality of images are adjacent to each other so as not to overlap, but does not require that the adjacent images do not exactly overlap at all. It does not mean to completely eliminate the state where some parts overlap slightly. That is, without adjusting the brightness of a plurality of images in the "superimposed portion" of the "superimposed projection" described in the following description of the present embodiment, the plurality of images are projected adjacent to each other so as not to overlap as much as possible. be. In that sense, among the types of multi-screen projection in the following description of this embodiment, "projection without overlay" may be expressed as "projection without brightness adjustment of the superimposed portion". Similarly, "projection with overlap" may be expressed as "projection with brightness adjustment of the superimposed portion". In such a usage pattern, it is necessary to pay attention so that the joints of the images at the time of multi-screen projection do not become unnatural in each of the plurality of projection type image display devices 100.

Next, the problem of multi-screen projection by a plurality of projection type image display devices 100 will be examined in detail.

<< Example of multi-screen projection by "non-overlapping projection">>
First, an example of multi-screen projection by "non-overlapping projection" will be described.

An example of displaying a target gradation image in [projection without overlay] of image 1 and image 2 will be described with reference to FIG.

FIG. 2 shows a case where the input image, which is the original image, has an average luminance value of 50 in the non-overlapping projection of the images of the two projection type image display devices. Further, the image 1 is for 1000 pixels (positions of 0 to 1000 pixels), and the image 2 is for 1000 pixels (positions of 1000 to 2000 pixels).

In this case, in the relationship between the screen position (pixel (pixel) position: 0 to 2000) and the luminance value (0 to 100), the luminance value is 0 and the screen position is 2000 pixels when the screen position is 0 pixel. At the position of, the luminance value becomes 100, and if it can be displayed with the characteristic of increasing linearly, the joint between the image 1 and the image 2 will not be unnatural.

<< Example of multi-screen projection by "projection with overlap">>
Next, an example of multi-screen projection by "overlapping projection" will be described.

An example of displaying a target gradation image in [Overlapping projection] of image 1 and image 2 will be described with reference to FIG.

FIG. 3 shows a case where the input image, which is the original image, has an average luminance value of 50 in the superimposed projection of the images of the two projection type image display devices. Further, the video 1 is for 1200 pixels (positions of 0 to 1200 pixels), and the video 2 is for 1200 pixels (positions of 800 to 2000 pixels). The overlapping portion of the image 1 and the image 2 is 400 pixels.

In this case, in the relationship between the screen position (pixel (pixel) position: 0 to 2000) and the luminance value (0 to 100), the luminance value is 0 and the screen position is 2000 pixels when the screen position is 0 pixel. At the position of, the luminance value becomes 100, and if it can be displayed with the characteristic of increasing linearly, the joint between the image 1 and the image 2 will not be unnatural.

Next, an example of attempting to display the target gradation image described with reference to FIG. 2 by using a conventional projection type image display device will be described.

FIG. 4 shows an example of a system configuration when performing multi-screen projection by two conventional projection type image display devices 90-1 and 90-2. When projecting on multiple screens, the input image of each projection type image display device is different. For example, in FIG. 4, the input image 1 of the projection type image display device 90-1 given from the information processing apparatus 290, which is an external device, and the input image 2 of the projection type image display device 90-2 are different. Therefore, it is necessary to improve the quality of the joint by adjusting the black display and the white display of the joint between the image 1 and the image 2 displayed on the display surface by multi-screen projection so as to be close to each other.

However, when the configurable light function (lamp dimming function, variable iris function) corresponding to the input images of the respective projection type image display devices 90-1 and 90-2 is performed, the respective projection type image display devices 90-1 are performed. , 90-2 black brightness and white brightness change, and the connection of the brightness of the joint becomes unnatural. Therefore, conventionally, it was necessary to turn off the input video interlocking configurable light function.

An example of turning on and off the input video interlocking configurable light function in multi-screen projection with a conventional projection type video display device will be described below.

<< [Projection without overlay + Input video interlocking possible No modulation light function] >>
First, an example of attempting a target gradation display in the state of [projection without overlay + no modulation light function linked to input video] will be described with reference to FIG.

FIG. 5 shows a case where the configurable light function linked to the input image is turned off (or in the non-overlapping projection of the image 1 of the projection type image display device 90-1 and the image 2 of the projection type image display device 90-2). If there is no such function).

In this case, in the relationship between the screen position (position of 0 to 1000 pixels) of the image 1 and the luminance value, the luminance value is 0 at the position where the screen position is 0 pixels, and the luminance value is at the position where the screen position is 1000 pixels. It becomes 50, and it becomes a characteristic that increases linearly.

Further, in the relationship between the screen position (position of 1000 to 2000 pixels) of the image 2 and the luminance value, the luminance value is 50 when the screen position is 1000 pixels, and the luminance value is 100 when the screen position is 2000 pixels. , It becomes a characteristic that increases linearly.

As described above, when the configurable light function is turned off or when the function is not provided, the target gradation display can be reproduced, and the joint between the image 1 and the image 2 can be in a natural state.

<< Problem: [Projection without overlay + Modulated light function linked to input video of the prior art] >>
Next, the problem in the case of trying the target gradation display in the state of [projection without overlay + modulation light function linked with input video of the prior art] will be described with reference to FIG.

FIG. 6 shows a configurable optical function linked to the input image of the prior art in the non-overlapping projection of the image 1 of the projection type image display device 90-1 and the image 2 of the projection type image display device 90-2. This is the case when the function is ON.

Here, the input video interlocking configurable light function of the prior art will be described with an example of a general function of varying the dimming amount in conjunction with the average luminance of the input video signal. For the sake of simplicity, the brightness value of the input image is set in the range of 0 to 100, the dimming amount is 0% when the average brightness is 0, the dimming amount is 100% when the average brightness is 100, and the intermediate dimming amount is set. It shall be proportional to the average brightness.

Further, the image 1 is for 1000 pixels (positions of 0 to 1000 pixels), and the input average luminance value is 25. Video 2 is for 1000 pixels (positions of 1000 to 2000 pixels), and the input average luminance value is 75. Input average luminance value = 50 for the entire image (positions of 0 to 2000 pixels).

In this case, since the input average luminance value input to the projection type image display device 90-1 is 25, the dimming rate by the configurable light function of the projection type image display device 90-1 is 25%. Therefore, in the relationship between the screen position of the image 1 (position of 0 to 1000 pixels) and the output luminance value (no dimming function × 0.25), the luminance value is 0 at the position where the screen position is 0 pixel, and the screen position. At the position of 1000 pixels, the luminance value becomes 12.5, which is a characteristic of linearly increasing.

Further, since the input average luminance value input to the projection type image display device 90-2 = 75, the dimming rate by the configurable light function of the projection type image display device 90-2 is 75%. Therefore, in the relationship between the screen position of the image 2 (position of 1000 to 2000 pixels) and the luminance value (without dimming function × 0.75), the luminance value is 37.5 at the position where the screen position is 1000 pixels, and the screen. At the position of 2000 pixels, the luminance value becomes 75, which is a characteristic of linearly increasing.

The original target luminance value (without dimming function x 0.5) shown by the dotted line is 0 at the position where the screen position is 0 pixels and 50 at the position where the screen position is 2000 pixels. , Should be a characteristic that increases linearly. On the other hand, in the example of FIG. 6, in the relationship between the screen position (position of 0 to 2000 pixels) when the image 1 and the image 2 are combined and the combined output luminance value, the screen position is the position of 0 to 1000 pixels. And, at the position of 1000 to 2000 pixels, it is a characteristic that increases linearly, but at the position of 1000 pixels, the combined output luminance value changes from 12.5 to 37.5. That is, the combined output luminance value deviates from the target luminance value, and the luminance change at the screen position of 1000 pixels, which is the joint of the images, is unnatural.

<< [Projection with overlay + Input video interlocking possible No modulation light function] >>
Next, an example of attempting a target gradation display in the state of [projection with overlay + no modulation light function linked to input video] will be described with reference to FIG. 7. Since the system configuration example is the same as that in FIG. 4, the description thereof will be omitted.

FIG. 7 shows a case where the dimming function linked to the input image is turned off (or the subject) in the superimposed projection of the image 1 of the projection type image display device 90-1 and the image 2 of the projection type image display device 90-2. If there is no function).

In this case, in the relationship between the screen position (position of 0 to 1200 pixels) of the image 1 and the luminance value, the luminance value is 0 at the position where the screen position is 0 pixels, and the luminance value is at the position where the screen position is 800 pixels. At 40, the brightness value becomes 0 when the screen position is 1200 pixels, the characteristic is that the screen position increases linearly in the range of 0 to 800 pixels, and the brightness value decreases linearly in the range of 800 to 1200 pixels. It becomes a characteristic.

Further, in the relationship between the screen position (position of 800 to 2000 pixels) of the image 2 and the brightness value, the brightness value is 0 when the screen position is 800 pixels, and the brightness value is 60 when the screen position is 1200 pixels. , The brightness value becomes 100 when the screen position is 2000 pixels, the characteristic increases linearly when the screen position is in the range of 800 to 1200 pixels, and the characteristic increases linearly when the screen position is in the range of 1200 to 2000 pixels ( (Characteristics that gradually increase from the range of 800 to 1200 pixels).

Here, unlike the non-overlapping projection of FIG. 5, in the superimposed projection of FIG. 7, in the superimposed portion of the two images (the portion of 800 to 1200 pixels in the example of FIG. 7), both images are naturally mixed. In addition, the combined output brightness value is calculated by adjusting the output brightness value (adjusting the brightness of the superimposed part) so that the combined output brightness value becomes the target gradation while gradually lowering the output brightness value toward the screen edge in both images. ..

In this way, when the configurable light function is turned off or when there is no such function, the target gradation display can be reproduced even with overlapping projection, and the joint between the image 1 and the image 2 should be in a natural state. Can be done.

<< Problem: [Projection with overlay + Modulated light function linked to input video of the prior art] >>
Next, the problem in the case of trying the target gradation display in the state of [projection with overlay + modulation light function linked with input image of the prior art] will be described with reference to FIG.

In FIG. 8, in addition to the superimposed projection of the image 1 of the projection type image display device 90-1 and the image 2 of the projection type image display device 90-2, there is a dimming function linked to the input image of the prior art. , When the function is ON.

It is assumed that the input video interlocking modulatorable light function of the prior art illustrated here is the same as the input video interlocking configurable light function of the prior art described with reference to FIG. 6, and the description thereof will be omitted again.

Further, the image 1 has 1200 pixels (positions of 0 to 1200 pixels), and the input average luminance value = 30. The image 2 has 1200 pixels (positions of 800 to 2000 pixels), and the input average luminance value is 70. Input average luminance value = 50 for the entire image (positions of 0 to 2000 pixels).

In this case, since the input average luminance value input to the projection type image display device 90-1 is 30, the dimming rate by the configurable light function of the projection type image display device 90-1 is 30%. Therefore, in the relationship between the screen position of the image 1 (position of 0 to 1200 pixels) and the brightness value (no dimming function × 0.3), the brightness value is 0 and the screen position is at the position where the screen position is 0 pixel. The brightness value is 15 at the position of 800 pixels, the brightness value is 0 at the position of the screen position of 1200 pixels, and the characteristic is that the screen position increases linearly in the range of 0 to 800 pixels, and the screen position is 800 to 1200 pixels. In the range of, the characteristic is that it decreases linearly.

Further, since the input average luminance value input to the projection type image display device 90-2 = 70, the dimming rate by the configurable light function of the projection type image display device 90-2 is 70%. Therefore, in the relationship between the screen position of the image 2 (position of 800 to 2000 pixels) and the brightness value (without dimming function × 0.7), the brightness value is 0 and the screen position is at the position where the screen position is 800 pixels. The brightness value is 52.5 at the position of 1200 pixels, the brightness value is 70 at the position of 2000 pixels, and the screen position increases linearly in the range of 800 to 1200 pixels, and the screen position is 1200 to 1200. In the range of 2000 pixels, the characteristic increases linearly (characteristic that increases more slowly than in the range of 800 to 1200 pixels).

The original target luminance value (without dimming function x 0.5) shown by the dotted line is 0 at the position where the screen position is 0 pixels and 50 at the position where the screen position is 2000 pixels. , Should be a characteristic that increases linearly. On the other hand, in the example of FIG. 8, in the relationship between the screen position (position of 0 to 2000 pixels) when the image 1 and the image 2 are combined and the combined output luminance value, the screen position is the position of 0 to 800 pixels. The characteristic is that the combined output luminance value increases linearly from 15 to 52.5 at the position of 800 to 1200 pixels of the overlapping portion, although the characteristic increases linearly at the position of 1200 to 2000 pixels. That is, the combined output luminance value deviates from the target luminance value, and the luminance change around the overlapped portion 800 to 1200 pixels, which is the joint of the images, becomes unnatural.

As described above, in the conventional projection type image display device, when the input image interlocking configurable light function is turned on when performing multi-screen projection, the change in brightness around the joint becomes unnatural, so the input image interlocking It was necessary to turn off the configurable light function. Therefore, in multi-screen projection, it is not easy to obtain the effect of expanding the dynamic range of the image by the input image interlocking configurable light function.

<Means for solving the problem of multi-screen projection>
Next, a solution for solving the above-mentioned problem of multi-screen projection will be described. In the multi-screen projection by the conventional projection type image display device described above, there is a problem that the joint between the image 1 and the image 2 becomes unnatural, and this is solved in the present embodiment as follows.

In the present embodiment, at the time of multi-screen projection, a common dimming value is set by using a parameter based on an image portion (for example, the entire input image) in a range larger than the divided image unit, instead of dimming in the divided image unit. However, by using the common dimming value in common for a plurality of projection type video display devices, the dimming rate between the plurality of projection type video display devices can be made closer, and the dimming function can be operated. It is also possible to make the boundary part (joint, boundary) of multi-screen projection inconspicuous. Specifically, it is as follows.

<< Solution: [Projection without overlay + Modulated light function linked to input video of this embodiment] >>
The operation concept of [projection without superimposition + input video interlocking configurable light function of the present embodiment] that solves the conventional problems will be described with reference to FIG.

FIG. 9 shows an operation example that can solve the problem in << Problem: [Projection without overlay + Modulated light function linked with input video of the prior art] >> shown in FIG. 6 described above. ing.

The input video-linked configurable light function of the present embodiment in FIG. 9 realizes, for example, the configuration of the “input video-linked configurable light function” described in the description of FIG. 1, that is, the light-shielding dimming of the variable diaphragm 120. The function (variable iris function) or the function of realizing the voltage-modifiable light of the power supply 106 for the light source (lamp dimming function) is applied.

In the input video-linked configurable light function of the present embodiment, the input average luminance value of a video larger than each video (eg, the entire video) is commonly used for both video 1 and video 2. As a result, the combined output luminance value is brought closer to the target luminance value.

In FIG. 9, the image 1 is for 1000 pixels (positions of 0 to 1000 pixels), and the input average luminance value is 25. Video 2 is for 1000 pixels (positions of 1000 to 2000 pixels), and the input average luminance value is 75. Input average luminance value = 50 for the entire image (positions of 0 to 2000 pixels).

In this case, in the relationship between the screen position (position of 0 to 2000 pixels) when the image 1 and the image 2 are combined and the combined output luminance value, the input image interlocking configurable light function of the prior art indicates by a broken line. As described above, since the composite output luminance value changes from 12.5 to 37.5 at the position of 1000 pixels, the composite output luminance value deviates from the target luminance value, and the screen position of 1000 pixels is connected. My eyes were unnatural.

On the other hand, in the input video interlocking configurable light function of the present embodiment, the calculation is based on the respective input average luminance values of the video 1 (input average luminance value = 25) and the video 2 (input average luminance value = 75). The dimming value (25% and 75% in the example of FIG. 6) is not applied separately, and the dimming value calculated based on the input average luminance value = 50 of the entire image larger than the image 1 and the image 2 (the dimming value). 50%) is used in common for both video 1 and video 2. As a result, as shown by the solid line, the luminance value is 0 at the position where the screen position is 0 pixels, and the luminance value is 50 at the position where the screen position is 2000 pixels, which is a characteristic of linearly increasing. As a result, the combined output luminance value approaches the target luminance value, and the luminance change near the screen position of 1000 pixels, which is the joint of the screens, becomes more natural.

<< Solution: [Projection with overlay + Modulated light function linked to input video of this embodiment] >>
Next, with respect to [overlapping projection], the operation concept of [overlapping projection + input video interlocking configurable light function of the present embodiment] that solves the conventional problem will be described with reference to FIG.

FIG. 10 shows an operation example that can solve the problem in << Problem: [Overlapping projection + Input image interlocking configurable light function of the prior art] >> shown in FIG. 8 described above. ing.

The input video-linked configurable light function of the present embodiment in FIG. 10 is also the same as the example of FIG. 9, for example, the configuration of the “input video-linked configurable light function” described in the description of FIG. 1, that is, the variable aperture 120. The function of realizing the light-shielding dimming (variable iris function) or the function of realizing the voltage-modifiable light of the power supply 106 for the light source (lamp dimming function) is applied.

Also in the input video interlocking configurable light function of the present embodiment, the input average luminance value of a video larger than each video (eg, the whole video) is commonly used for both video 1 and video 2. As a result, the combined output luminance value is brought closer to the target luminance value.

In FIG. 10, the image 1 has 1200 pixels (positions of 0 to 1200 pixels), and the input average luminance value is 30. The image 2 has 1200 pixels (positions of 800 to 2000 pixels), and the input average luminance value is 70. Input average luminance value = 50 for the entire image (positions of 0 to 2000 pixels).

In this case, in the relationship between the screen position (position of 0 to 2000 pixels) when the image 1 and the image 2 are combined and the combined output luminance value, the input image interlocking configurable light function of the prior art indicates by a broken line. As described above, since the composite output luminance value linearly and rapidly increases from 15 to 52.5 at the position of 800 to 1200 pixels of the overlapping portion, the composite output luminance value deviates from the target luminance value, and , The joint of the screen position of 800 to 1200 pixels of the overlapped part became unnatural.

On the other hand, in the input video interlocking configurable light function of the present embodiment, the calculation is based on the respective input average luminance values of the video 1 (input average luminance value = 30) and the video 2 (input average luminance value = 70). The dimming value (30% and 70% in the example of FIG. 6) is not applied separately, and the dimming value calculated based on the input average luminance value = 50 of the entire image larger than the image 1 and the image 2 (the dimming value). 50%) is used in common for both video 1 and video 2. As a result, as shown by the solid line, the luminance value is 0 at the position where the screen position is 0 pixels, and the luminance value is 50 at the position where the screen position is 2000 pixels, which is a characteristic of linearly increasing. As a result, the combined output brightness value approaches the target brightness value (without dimming function x 0.5), and the brightness change near the screen position of 800 to 1200 pixels of the overlapping portion, which is the joint of the screens, becomes more natural. become.

<Basic example>, <Modified example 1>, <Modified example 2>, <Modified example 3>, <Modified example 4>, <Modified example 5> to which the above-described <Means for solving the problem of multi-screen projection> are applied. >, <Modified Example 6>, and <Modified Example 7> will be described in order below. It should be noted that these basic examples and modified examples can be applied to any of the above-mentioned [projection without overlay] and [projection with overlay].

<Basic example>
A basic example will be described with reference to FIGS. 11 to 14. FIG. 11 is a diagram for explaining the configuration of the basic example.

As shown in FIG. 11, as a configuration of a basic example, an example having a plurality of projection type image display devices 100-1 and 100-2 as projection type image display devices and an information processing device 300a as an external device. To explain. The projection type image display devices 100-1 and 100-2 are projection type image display devices 100 having an internal configuration as shown in FIG. 1 described above. The information processing device 300a is an example of an external device 300 connected to the video signal input unit / output unit 131 shown in FIG. 1 described above.

For the connection between the projection type video display device and the information processing device described in FIGS. 11 and the following drawings and the connection between the plurality of projection type video display devices, for example, the connection by the interface 190 described in FIG. 1 is used. Just do it. By doing so, it is possible to send and receive not only video but also control information at each connection.

The information processing device 300a is based on the input image 0 projected on the multi-screen by both the projection type image display devices 100-1 and 100-2, and the input to be displayed by the projection type image display devices 100-1 and 100-2, respectively. Generate images 1 and 2. Further, the information processing apparatus 300a has a dimming amount by calculation using the entire input video 0, which is a wider range than the respective ranges of the input video 1 and 2 displayed by the projection type video display devices 100-1 and 100-2. Is determined, and information (dimming control information) that specifies this dimming amount is also generated.

Then, the information processing device 300a outputs the input image 1 to be displayed by the projection type image display device 100-1 and the dimming control information to the projection type image display device 100-1. With this as an input, the projection type video display device 100-1 displays the video 1 while changing the dimming amount based on the dimming control information. Similarly, the information processing apparatus 300a outputs the input image 2 displayed by the projection type image display device 100-2 and the dimming control information to the projection type image display device 100-2. With this as an input, the projection type video display device 100-2 displays the video 2 while changing the dimming amount based on the dimming control information. The dimming control information transmitted to the projection type image display device 100-1 and the projection type image display device 100-2 stores a shared dimming value, which is projected with the projection type image display device 100-1. It is commonly used for both type image display devices 100-2.

The effects in the configuration of the basic example are that the joint between the image 1 displayed by the projection type image display device 100-1 and the image 2 displayed by the projection type image display device 100-2 during multi-screen projection is inconspicuous and the image is inconspicuous. It is possible to achieve both the high dynamic range of the entire multi-screen projection image of 1 and the image 2.

<< Projection-type video display device in the basic example >>
The projection type video display device in the basic example will be described with reference to FIG. FIG. 12 is a diagram for explaining a projection type video display device in a basic example.

As shown in FIG. 12, as the projection type image display device in the basic example, the projection type image display device 100-1 will be described as an example. The projection type image display device 100-1 has a configurable light function (lamp dimming function, input image interlocking configurable light function of variable iris function), and has a plurality of display modes using the modulatorable light function. One of the display modes can be selected from the menu screen that is superimposed on the projected image.

Then, in the display mode using the configurable light function, the dimming amount is changed according to the dimming control information input from the information processing apparatus 300a, which can control the configurable light function in units of one frame of the projected image. However, there is a first display mode for displaying the input video 1. That is, in the first display mode, the dimming amount is changed according to the input dimming control information. This first display mode is the display mode (multi-screen projection mode) used at the time of the above-mentioned multi-screen projection.

Further, in the display mode using the configurable light function, the amount of dimming is adjusted according to the input image 1 input to the projection type image display device 100-1 for use in the projection type image display device 100-1 independent projection. There is a second display mode in which the input video 1 is displayed while changing. That is, the calculation target of the dimming amount calculation in the second display mode is the input image to the projection type image display device 100-1 as shown in FIG. This second display mode is a display mode (single display mode) when the projection type video display device 100-1 is used alone.

<< Menu screen in the basic example >>
The menu screen in the basic example will be described with reference to FIG. FIG. 13 is a diagram for explaining a menu screen in a basic example.

As shown in FIG. 13, the input video interlocking modulatorable optical function mode menu as the menu screen in the basic example includes a multi-screen projection mode as the first display mode and a single display mode as the second display mode. There is. Further, the input video-linked configurable light function mode menu is also provided with a mode for turning off the input video-linked configurable light function. These modes may be configured so that they can be selectively selected by moving the cursor or the like based on the operation input input to the operation input unit 107.

In the configuration of this basic example, the image quality control interlocking function of <Modification Example 5> and the local image quality adjustment prohibition function of <Modification Example 6>, which will be described later, can be added as the image quality adjustment function. For example, in the first display mode, the execution of the first image quality adjustment process (image quality control interlocking function of <Variation Example 5>) that uniformly affects the entire input image is permitted, and the image quality adjustment for the input image is local. The second image quality adjustment process (local image quality adjustment prohibition function of <Modification Example 6>) may be prohibited. Further, in the second display mode or the mode in which the input video interlocking configurable light function is OFF, both the first image quality adjustment process and the second image quality adjustment process may be permitted.

Further, in the configuration of this basic example, even when the input image interlocking configurable light function is turned off due to the individual difference of the light source 105, the brightness of the plurality of projection type image display devices 100-1 and 100-2 is non-uniform. As a response to, the function of <modification example 7> described later can be added. For example, the projection type image display devices 100-1 and 100-2 have a dimming amount by a dimming means different from the dimming means used for the input image interlocking modulatorable light function (second control of <Modification 7>). It has a second configurable optical function (first control of <modification example 7>) that can change the light intensity. This second configurable light function provides a configurable light function when a projection type image display device 100-1 and another projection type image display device 100-2 are used to simultaneously display related images. This is a mutable light function used to make the boundary between the two projected images inconspicuous when the light is turned off. The dimming means used for the configurable light function is not used for the second modulatorable light function.

These additional functions of <Modification Example 5>, <Modification Example 6>, and <Modification Example 7> are not limited to <Basic Example>, but are described later in <Transformation Example 1>, <Modification Example 2>, and <Modification Example 3>. > And <Modification 4> can be added in the same manner.

<< n units connection example in the basic example >>
An example of connecting n units in the basic example will be described with reference to FIG. FIG. 14 is a diagram for explaining an example of connecting n units in the basic example.

As shown in FIG. 14, in the example of connecting n projection type video display devices 100-1, 100-2, ..., 100-n and the information processing device 300a, the information processing device 300a is a projection type. Input images 1, 2, ..., N to be displayed by the image display devices 100-1, 100-2, ..., 100-n are generated. The information processing device 300a also generates dimming control information that specifies a dimming amount common to the projection type image display devices 100-1, 100-2, ..., 100-n. Then, the information processing device 300a outputs the input images 1, 2, ..., N and the dimming control information to each of the projection type image display devices 100-1, 100-2, ..., 100-n. .. With this as an input, each of the projection type image display devices 100-1, 100-2, ..., 100-n has a dimming amount based on the dimming control information that specifies a common dimming value in all the devices. Images 1, 2, ..., N are displayed while changing.

In this way, when the n units of the projection type image display devices 100-1 to 100n are projected on multiple screens, the image 1 displayed by the projection type image display device 100-1 and the projection type image display device 100-2 are displayed. The joint between the image 2 and the image 2 displayed by the projection type image display device 100-2 and the image 3 displayed by the projection type image display device 100-3, ..., The projection type image display device 100- ( It is possible to improve the quality of the joint between the image n-1 displayed by n-1) and the image n displayed by the projection type image display device 100-n.

Hereinafter, a plurality of modified examples will be described, but in each of the modified examples, the same parts as the operations and processes described in the basic examples will be omitted in order to avoid duplication of description.

<Modification 1>
Modification 1 will be described with reference to FIGS. 15 to 18. FIG. 15 is a diagram for explaining the configuration of the modified example 1.

As shown in FIG. 15, as the configuration of the first modification, the projection type image display devices 100-1 and 100-2 as a plurality of projection type image display devices and the information processing device 300a as an external device are included. An example will be described.

The information processing apparatus 300a outputs the input image 0 projected on the multi-screen by both the projection type image display devices 100-1 and 100-2 to the projection type image display devices 100-1 and 100-2.

With this as an input, the projection type video display devices 100-1 and 100-2 determine the dimming amount according to the entire input video 0, but among the input video 0, the respective projection type video display devices 100-1 , Partial trimmed images 1 and 2 set in 100-2 (images 1 and 2 trimmed from input image 0) are displayed. That is, in the multi-screen projection mode, the dimming amount is determined by calculation using the entire input video 0, which is a wider range than the range displayed by the projection type video display devices 100-1 and 100-2, and the projection type video display is performed. The same calculation is used in the device 100-1 and the projection type image display device 100-2. At this time, since the projection-type video display device 100-1 and the projection-type video display device 100-2 perform calculations for the same video (input video 0), the projection-type video display device 100-1 and the projection-type video are performed. The dimming value is shared with the display device 100-2. Therefore, it is possible to improve the quality of the joints of the projected images of these devices in the multi-screen projection mode.

In addition, in order to make other settings such as image quality common, a communication line may be connected between the projection type video display device 100-1 and the projection type video display device 100-2 for communication. ..

<< Projection-type video display device in Modification 1 >>
The projection type video display device according to the first modification will be described with reference to FIG. FIG. 16 is a diagram for explaining the projection type video display device in the first modification.

As shown in FIG. 16, as the projection type image display device in the first modification, the projection type image display device 100-1 will be described as an example. The projection type image display device 100-1 has a configurable light function (lamp dimming function, variable iris function), has a plurality of display modes using the configurable light function, and displays one of a plurality of display modes. The mode can be selected from the menu screen.

Then, in the display mode using the configurable light function, the input video 0 is trimmed while changing the dimming amount according to the calculation for the input video 0 input to the projection type video display device 100-1. There is a first display mode for displaying the image 1. That is, in the first display mode, as shown in FIG. 16, the display target is the video 1 trimmed from the input video 0, and the calculation target is the entire input video 0. This first display mode is a multi-screen projection mode.

Further, in the display mode using the configurable light function, the dimming amount is changed according to the calculation for the input video 0 input to the projection type video display device 100-1 or the scaled video X. However, there is a second display mode for displaying the image X obtained by scaling the input image 0. In FIG. 16, the video X obtained by scaling (reducing) the input video 0 is targeted for calculation. This second display mode is a stand-alone display mode.

In the projection type image display device 100-1 in the first modification, it is not always necessary to have an output to another projection type image display device 100-2, and the output may not be present.

<< Menu screen in variant 1 >>
The menu screen in the first modification will be described with reference to FIG. FIG. 17 is a diagram for explaining the menu screen in the first modification.

As shown in FIG. 17, the input video interlocking modulatorable optical function mode menu as the menu screen in the first modification has a multi-screen projection mode as the first display mode and a single display mode as the second display mode. There is. Further, the input video-linked configurable light function mode menu is also provided with a mode for turning off the input video-linked configurable light function.

<< Example of connecting n units in Modification 1 >>
An example of connecting n units in the first modification will be described with reference to FIG. FIG. 18 is a diagram for explaining an example of connecting n units in the modified example 1.

As shown in FIG. 18, in the example of connecting n projection type video display devices 100-1, 100-2, ..., 100-n and the information processing device 300a, the information processing device 300a is a projection type. Input video 0 is output to each of the video display devices 100-1, 100-2, ..., 100-n. With this as an input, the projection type video display devices 100-1, 100-2, ..., 100-n determine the dimming amount according to the entire input video 0, but each of the input video 0 Some trimmed images 1, 2, ..., N set by the projection type image display devices 100-1, 100-2, ..., 100-n, that is, images 1, 2, ..., N trimmed from the input image 0. Is displayed.

In this way, when n units of the projection type image display devices 100-1 to 100-n are projected on multiple screens, the respective projection type image display devices 100-1, 100-2, ..., 100-n are displayed. It is possible to improve the quality of the joints of the images 1, 2, ..., N to be performed.

As described above, in the modified example 1, the common dimming value can be calculated among the plurality of projection type video display devices by the processing on the side of the plurality of projection type video display devices according to this example, and the common adjustment can be calculated. A configurable optical function using optical values can be realized. Therefore, in the first modification, the information processing device 300a does not need to be equipped with a function for generating dimming control information, and may be a simple video output device. That is, in the first modification, even if the information processing device 300a is a simple video output device, it is possible to improve the quality of the joint of the projected video in the multi-screen projection mode.

<Modification 2>
Modification 2 will be described with reference to FIGS. 19 to 24. FIG. 19 is a diagram for explaining the configuration of the modified example 2.

As shown in FIG. 19, as the configuration of the second modification, the projection type image display devices 100-1 and 100-2 as a plurality of projection type image display devices and the information processing device 300a as an external device are included. An example will be described.

The first projection type image display device 100-1 is used as a master, and the other projection type image display device 100-2 is used as a slave. The information processing device 300a outputs the input image 0 (the image including the entire display image of the multi-screen projection) to the projection type image display device 100-1 of the master.

In the master projection type video display device 100-1, the input video 0 is input, the trimming of the video 1 and the video 2 is specified, and the video 2 is output to the slave projection type video display device 100-2. The dimming control information calculated by the calculation (average brightness, histogram, maximum brightness) based on the input video 0 is also output to the projection type video display device 100-2. This dimming control information is used to bring the dimming state of the projection type image display device 100-2 closer to the dimming state of the projection type image display device 100-1 (to make the dimming value common). This is dimming control information capable of controlling the configurable light function of the projection type video display device 100-2 in units of one frame. At this time, since the projection type image display device 100-2 performs dimming according to the dimming control information, the dimming value is common between the projection type image display device 100-1 and the projection type image display device 100-2. Is made. Therefore, it is possible to improve the quality of the joints of the projected images of these devices in the multi-screen projection mode.

<< Master projection type video display device in Modification 2 >>
The master projection type image display device in the second modification will be described with reference to FIG. FIG. 20 is a diagram for explaining the projection type image display device of the master in the second modification.

As shown in FIG. 20, the projection type image display device 100-1 of the master in the second modification has a configurable light function (lamp dimming function, variable iris function), and is a display mode using the modulatorable light function. It is possible to select one of a plurality of display modes from the menu screen.

Then, in the display mode using the configurable light function, the input video 0 is trimmed while changing the dimming amount according to the calculation for the input video 0 input to the projection type video display device 100-1. There is a first display mode (multi-screen projection mode) for displaying the image 1.

Further, in the first display mode, the projection type image display device 100 is calculated for each frame of the projection image calculated according to the calculation for the input image 0 for the slave projection type image display device 100-2. The dimming control information capable of controlling the configurable light function of -2 and the image 2 trimmed from the input image 0, which is different from the image 1, are output.

Further, in the display mode using the configurable light function, the dimming amount is changed according to the calculation for the input video 0 input to the projection type video display device 100-1 or the scaled video X. However, there is a second display mode (single display mode) for displaying the video X obtained by scaling the input video 0.

Like the master projection type video display device 100-1 in the second modification, the transmission processing of the video 2 and the dimming control information for the slave projection type video display device 100-2 is performed by the video signal input unit / This can be realized by transmitting data in the data format as shown in FIG. 21, for example, in the interface 190, which is an integrated interface between the output unit 131 and the communication unit 132. FIG. 21 is a diagram for explaining an example of a data format.

As shown in FIG. 21, the data format includes a frame header or a frame-by-frame user data area and a payload area in one frame of data. The payload area contains video information, and the frame header or frame-by-frame user data area contains dimming control information. By transmitting in such a data format, it is possible to realize dimming control in frame units in the projection type video display device of the transmission destination. The data format may be applied to both the video data and the dimming control information in both the basic example of this embodiment and the plurality of other modifications.

<< Slave projection type video display device in Modification 2 >>
The slave projection type video display device in the second modification will be described with reference to FIG. 22. FIG. 22 is a diagram for explaining the slave projection type video display device in the second modification.

As shown in FIG. 22, the slave projection type video display device 100-2 in the second modification has the same configuration as the projection type video display device 100-2 of the above-mentioned basic example, and the dimming value calculated from the input video. Instead of realizing the configurable light, the configurable light function is realized according to the dimming control information. The display mode using this configurable light function (slave dimming amount variable display mode) is a tuning that is output from the master projection type image display device 100-1 and input to the slave projection type image display device 100-2. This is the first display mode (multi-screen projection mode) in which the input image 2 which is the input image trimmed from the input image 0 is displayed while changing the dimming amount according to the optical control information.

<< Master / Slave Projection-type Video Display Device in Modification 2 >>
The master / slave projection type video display device in the second modification has the functions of both the master projection type video display device 100-1 and the slave projection type video display device 100-2 described above, and the functions can be switched. It is a projection type video display device, has a configurable light function (lamp dimming function, variable iris function), has multiple display modes using the configurable light function, and is one of multiple display modes. Can be selected from the menu screen.

Then, in the display mode using the configurable light function, the image 1 trimmed from the input image 0 while changing the dimming amount according to the calculation for the input image 0 input to the projection type image display device. There is a first display mode (multi-screen projection mode) for displaying.

Further, in the display mode using the configurable light function, the dimming amount is adjusted according to the dimming control information input to the projection type image display device, which can control the configurable light function in units of one frame of the projected image. There is a third display mode (multi-screen projection mode) for displaying the input image 2 input to the projection type image display device while changing.

In the master / slave projection type image display device in the second modification, the multi-screen projection mode as the first display mode is called the master mode, and the multi-screen projection mode as the third display mode is called the slave mode. That is, it has a plurality of types of multi-screen projection modes.

<< Menu screen in variant 2 >>
The menu screen in the second modification will be described with reference to FIG. 23. FIG. 23 is a diagram for explaining the menu screen in the second modification. FIG. 23 shows an example of a master / slave projection type video display device.

As shown in FIG. 23, the input image interlocking configurable light function mode menu as the menu screen in the second modification has the multi-screen projection mode (master mode) as the first display mode and the third display mode. There is a multi-screen projection mode (slave mode) and a single display mode as a second display mode. Further, the input video-linked configurable light function mode menu is also provided with a mode for turning off the input video-linked configurable light function.

Therefore, in the master / slave projection type video display device of the second modification, the master mode, which is a multi-screen projection mode as the first display mode, and the slave mode, which is the multi-screen projection mode as the third display mode, are used. Has multiple types of multi-screen projection modes.

<< Example of connecting n units in Modification 2 >>
An example of connecting n units in the second modification will be described with reference to FIG. 24. FIG. 24 is a diagram for explaining an example of connecting n units in the modified example 2.

As shown in FIG. 24, in an example of connecting n projection type video display devices 100-1, 100-2, ..., 100-n and an information processing device 300a, the first projection type video display is displayed. The device 100-1 is used as a master, and the other projection type image display devices 100-2 to 100-n are used as slaves.

The information processing device 300a outputs the input video 0 to the master projection type video display device 100-1. With this as an input, the master projection type video display device 100-1 designates trimming of images 1 and 2 to n, and the video 2 to n are slave projection type video display devices 100-2 to 100-n. The dimming control information calculated by calculation based on the input video 0 is also output to the projection type video display devices 100-2 to 100-n. Then, the master projection type image display device 100-1 and the slave projection type image display devices 100-2 to 100-n display the images 1 and 2 to n.

In this way, when the master projection type image display device 100-1 and the slave projection type image display devices 100-2 to 100-n are projected on multiple screens, the projection type image display devices 100-1 and 100, respectively. It is possible to improve the quality of the joints of the images 1, 2, ..., N displayed by -2, ..., 100-n.

As described above, in the modified example 2, the common dimming value can be calculated among the plurality of projection type video display devices by the processing on the side of the plurality of projection type video display devices according to this example, and the common adjustment can be calculated. A configurable optical function using optical values can be realized. Therefore, in the second modification, the information processing device 300a does not need to be equipped with a function for generating dimming control information, and may be a simple video output device. Further, since the information processing device 300a only needs to be connected to the projected image display device to be the master, the above-mentioned effect can be obtained even when the information processing device 300a has only one video output unit. That is, in the second modification, even when the information processing device 300a is a mere video output device and has only one video output system, it is possible to improve the quality of the joint of the projected video in the multi-screen projection mode.

Further, in the second modification, the image of each projection type image display device is trimmed by the master projection type image display device, so that the slave projection type image display device does not require the trimming process.

<Modification 3>
Modification 3 will be described with reference to FIGS. 25 to 30. FIG. 25 is a diagram for explaining the configuration of the modified example 3.

As shown in FIG. 25, as the configuration of the modification 3, the projection type image display devices 100-1 and 100-2 as a plurality of projection type image display devices and the information processing device 300a as an external device are included. An example will be described.

The first projection type image display device 100-1 is used as a master, and the other projection type image display device 100-2 is used as a slave. The information processing device 300a outputs the input image 0 (the image including the entire display image of the multi-screen projection) to the projection type image display device 100-1 of the master.

In the master projection type video display device 100-1, the input video 0 is input, the trimming of the video 1 is specified, the input video 0 is output to the slave projection type video display device 100-2, and the input video is input. The dimming control information calculated by the calculation based on 0 (average brightness, histogram, maximum brightness) is also output to the projection type video display device 100-2. This dimming control information is a projection type image display device in units of one frame of the projected image in order to bring the dimming state of the projection type image display device 100-2 closer to the dimming state of the projection type image display device 100-1. This is dimming control information capable of controlling the configurable optical function of 100-2. At this time, since the projection type image display device 100-2 performs dimming according to the dimming control information, the dimming value is common between the projection type image display device 100-1 and the projection type image display device 100-2. Is made. Therefore, it is possible to improve the quality of the joints of the projected images of these devices in the multi-screen projection mode. Further, the projection type image display device 100-2 trims the input image 0 output from the projection type image display device 100-1 to the image 2.

<< Master projection type video display device in Modification 3 >>
The master projection type image display device in the third modification will be described with reference to FIG. 26. FIG. 26 is a diagram for explaining the projection type image display device of the master in the modification 3.

As shown in FIG. 26, the projection type image display device 100-1 of the master in the modification 3 has a configurable light function (lamp dimming function, variable iris function), and is a display mode using the modulatorable light function. It is possible to select one of a plurality of display modes from the menu screen.

Then, in the display mode using the configurable light function, the input video 0 is trimmed while changing the dimming amount according to the calculation for the input video 0 input to the projection type video display device 100-1. There is a first display mode (multi-screen projection mode) for displaying the image 1.

Further, in the first display mode, the projection type image display device 100 is calculated for each frame of the projected image, which is calculated according to the calculation for the input image 0 for the slave projection type image display device 100-2. The dimming control information capable of controlling the configurable light function of -2 and the input video 0 are output.

Further, in the display mode using the configurable light function, the dimming amount is changed according to the calculation for the input video 0 input to the projection type video display device 100-1 or the scaled video X. However, there is a second display mode (single display mode) for displaying the video X obtained by scaling the input video 0.

<< Slave projection type video display device in Modification 3 >>
The slave projection type video display device in the third modification will be described with reference to FIG. 27. FIG. 27 is a diagram for explaining the slave projection type video display device in the modified example 3.

As shown in FIG. 27, the slave projection type video display device 100-2 in the modification 3 has a configurable light function (lamp dimming function, variable iris function), and is a display mode using the modulatorable light function. It is possible to select one of a plurality of display modes from the menu screen.

The display mode using the configurable light function is based on the dimming control information input to the slave projection type image display device 100-2, which can control the configurable light function in units of one frame of the projected image. There is a display mode (multi-screen projection mode) in which the image 2 generated by trimming the input image 0 input to the slave projection type image display device 100-2 is displayed while changing the dimming amount.

<< Master / Slave Projection-type Video Display Device in Modification 3 >>
The master / slave projection type video display device in the third modification is a projection type video display device that combines the master projection type video display device 100-1 and the slave projection type video display device 100-2 described above. It has a configurable light function (lamp dimming function, variable iris function), has a plurality of display modes using the configurable light function, and one of a plurality of display modes can be selected from the menu screen.

Then, in the display mode using the configurable light function, the image 1 trimmed from the input image 0 while changing the dimming amount according to the calculation for the input image 0 input to the projection type image display device. There is a first display mode (multi-screen projection mode = master mode) to display.

Further, in the display mode using the configurable light function, the dimming amount is adjusted based on the dimming control information input to the projection type image display device, which can control the configurable light function in units of one frame of the projected image. There is a third display mode (multi-screen projection mode = slave mode) in which the image 2 obtained by trimming the input image 0 input to the projection type image display device while being changed is displayed.

<< Menu screen in variant 3 >>
The menu screen in the third modification will be described with reference to FIG. 28. FIG. 28 is a diagram for explaining the menu screen in the modified example 3. FIG. 28 shows an example of a master / slave projection type video display device.

As shown in FIG. 28, the input image interlocking configurable light function mode menu as the menu screen in the modification 3 includes the multi-screen projection mode (master mode) as the first display mode and the third display mode. There is a multi-screen projection mode (slave mode) and a single display mode as a second display mode. Further, the input video-linked configurable light function mode menu is also provided with a mode for turning off the input video-linked configurable light function.

<< n-unit connection example 1 in modification 3 >>
The n-unit connection example 1 in the modification 3 will be described with reference to FIG. 29. FIG. 29 is a diagram for explaining n-unit connection example 1 in the modification 3.

As shown in FIG. 29, in the example of connecting n projection type video display devices 100-1, 100-2, ..., 100-n and the information processing device 300a, the first projection type video display is displayed. The device 100-1 is used as a master, and the other projection type image display devices 100-2 to 100-n are used as slaves.

The information processing device 300a outputs the input video 0 to the master projection type video display device 100-1. With this as an input, the master projection type video display device 100-1 specifies trimming of the video 1, and further, the input video 0 is output to the slave projection type video display devices 100-2 to 100-n, and the input video 0 is output to the slave projection type video display devices 100-2 to 100-n. The dimming control information calculated by the calculation based on the input video 0 is also output to the projection type video display devices 100-2 to 100-n. Then, the master projection type image display device 100-1 and the slave projection type image display devices 100-2 to 100-n display the images 1 and 2 to n.

In this way, when the master projection type image display device 100-1 and the slave projection type image display devices 100-2 to 100-n are projected on multiple screens, the projection type image display devices 100-1 and 100, respectively. It is possible to improve the quality of the joints of the images 1, 2, ..., N displayed by -2, ..., 100-n.

<< N-unit connection example 2 (daisy chain) in modification 3 >>
The n-unit connection example 2 (daisy chain) in the modification 3 will be described with reference to FIG. FIG. 30 is a diagram for explaining n-unit connection example 2 (daisy chain) in the modified example 3.

As shown in FIG. 30, in the example of connecting n projection type image display devices 100-1, 100-2, ..., 100-n and the information processing device 300a, the first projection type image display The device 100-1 is used as a master, and the other projection type image display devices 100-2 to 100-n are used as slaves.

The information processing device 300a outputs the input video 0 to the master projection type video display device 100-1. With this as an input, the master projection type video display device 100-1 designates the trimming of the video 1, further outputs the input video 0 to the slave projection type video display device 100-2, and outputs the input video 0 to the input video 0. The dimming control information calculated by the calculation based on the above is also output to the projection type video display device 100-2. In this order, the slave projection type video display device 100-2 outputs the input video 0 and the dimming control information to the slave projection type video display device 100-3, ..., The slave projection type video display device 100-. (N-1) outputs the input video 0 and the dimming control information to the slave projection type video display device 100-n. Then, the master projection type image display device 100-1 and the slave projection type image display devices 100-2 to 100-n display the images 1 and 2 to n.

In this way, when the master projection type image display device 100-1 and the slave projection type image display devices 100-2 to 100-n are projected on multiple screens, the projection type image display devices 100-1 and 100, respectively. It is possible to improve the quality of the joints of the images 1, 2, ..., N displayed by -2, ..., 100-n.

As described above, in the modified example 3, the common dimming value can be calculated among the plurality of projection type video display devices by the processing on the side of the plurality of projection type video display devices according to this example, and the common adjustment can be calculated. A configurable optical function using optical values can be realized. Therefore, in the third modification, the information processing device 300a does not need to be equipped with a function for generating dimming control information, and may be a simple video output device. Further, since the information processing device 300a only needs to be connected to the projected image display device to be the master, the above-mentioned effect can be obtained even when the information processing device 300a has only one video output unit. That is, in the third modification, even when the information processing device 300a is a mere video output device and has only one video output system, it is possible to improve the quality of the joint of the projected video in the multi-screen projection mode.

Further, in the modification 3, each projection type video display device outputs the input video 0 as it is, and the projection type video display device in the subsequent stage trims the video, respectively. Therefore, in the master projection type video display device, the slave projection in the subsequent stage is performed. The trimming process for the type image display device becomes unnecessary. The above effect can also be obtained by daisy chain connection.

<Modification example 4>
Modification 4 will be described with reference to FIGS. 31 to 36. FIG. 31 is a diagram for explaining the configuration of the modified example 4.

As shown in FIG. 31, as the configuration of the modification 4, the projection type image display devices 100-1 and 100-2 as a plurality of projection type image display devices and the information processing device 300a as an external device are included. An example will be described.

The first projection type image display device 100-1 is used as a master, and the other projection type image display device 100-2 is used as a slave. The information processing device 300a outputs the input image 0 (the image including the entire display image of the multi-screen projection) to the projection type image display device 100-1 of the master.

In the master projection type video display device 100-1, the input video 0 is input, the trimming of the video 1 and the video 2 is specified, and the input video 0 is output to the slave projection type video display device 100-2. , The trimming range specification information 2 which is the information for designating the trimming range of the image 2, and the dimming control information calculated by the calculation (average brightness, histogram, maximum brightness) based on the input image 0 are also the projection type image display device 100-. Output to 2. This dimming control information is a projection type image display device in units of one frame of the projected image in order to bring the dimming state of the projection type image display device 100-2 closer to the dimming state of the projection type image display device 100-1. This is dimming control information capable of controlling the configurable optical function of 100-2. At this time, since the projection type image display device 100-2 performs dimming according to the dimming control information, the dimming value is common between the projection type image display device 100-1 and the projection type image display device 100-2. Is made. Therefore, it is possible to improve the quality of the joints of the projected images of these devices in the multi-screen projection mode.

<< Master projection type video display device in Modification 4 >>
The master projection type image display device in the fourth modification will be described with reference to FIG. 32. FIG. 32 is a diagram for explaining the projection type image display device of the master in the modified example 4.

As shown in FIG. 32, the projection type image display device 100-1 of the master in the modified example 4 has a configurable light function (lamp dimming function, variable iris function), and is a display mode using the modulatorable light function. It is possible to select one of a plurality of display modes from the menu screen.

Then, in the display mode using the configurable light function, the input video 0 is trimmed while changing the dimming amount according to the calculation for the input video 0 input to the projection type video display device 100-1. There is a first display mode (multi-screen projection mode) for displaying the image 1.

Further, in the first display mode, the projection type image display device 100 is calculated for each frame of the projection image calculated according to the calculation for the input image 0 for the slave projection type image display device 100-2. The dimming control information capable of controlling the configurable light function of -2, the input video 0, and the trimming range designation information for trimming the input video 0 are output. At this time, in the master projection type image display device 100-1, the image 1 displayed by the master projection type image display device 100-1 and the slave projection type image are displayed in response to the operation input input to the operation input unit 107. For each of the images 2 displayed by the display device 100-2, it is possible to set a trimming range to be displayed by trimming from the input image 0, and among them, the image displayed by the slave projection type image display device 100-2. Outputs trimming range specification information, which is information regarding the trimming range for 2.

Further, in the display mode using the configurable light function, the dimming amount is changed according to the calculation for the input video 0 input to the projection type video display device 100-1 or the scaled video X. However, there is a second display mode (single display mode) for displaying the video X obtained by scaling the input video 0.

<< Slave projection type video display device in Modification 4 >>
The slave projection type video display device in the fourth modification will be described with reference to FIG. 33. FIG. 33 is a diagram for explaining the slave projection type video display device in the modified example 4.

As shown in FIG. 33, the slave projection type video display device 100-2 in the modified example 4 has a configurable light function (lamp dimming function, variable iris function), and is a display mode using the configurable light function. It is possible to select one of a plurality of display modes from the menu screen.

The display mode using the configurable light function is based on the dimming control information input to the slave projection type image display device 100-2, which can control the configurable light function in units of one frame of the projected image. While changing the dimming amount, the input image 0 input to the slave projection type image display device 100-2 is trimmed using the trimming range specification information input to the projection type image display device 100-2. There is a display mode (multi-screen projection mode) that displays.

<< Master / Slave Projection-type Video Display Device in Modification 4 >>
The master / slave projection type video display device in the fourth modification is a projection type video display device that combines the master projection type video display device 100-1 and the slave projection type video display device 100-2 described above. It has a configurable light function (lamp dimming function, variable iris function), has a plurality of display modes using the configurable light function, and one of a plurality of display modes can be selected from the menu screen.

Then, in the display mode using the configurable light function, the image 1 trimmed from the input image 0 while changing the dimming amount according to the calculation for the input image 0 input to the projection type image display device. There is a first display mode (multi-screen projection mode = master mode) to display.

Further, in the display mode using the configurable light function, the dimming amount is adjusted based on the dimming control information input to the projection type image display device, which can control the configurable light function in units of one frame of the projected image. A third display mode (multi-screen projection mode =) that displays the image 2 trimmed by using the trimming range specification information input to the projection type image display device from the input image 0 input to the projection type image display device while changing. There is a slave mode).

<< Menu screen in variant 4 >>
The menu screen in the modified example 4 will be described with reference to FIG. 34. FIG. 34 is a diagram for explaining the menu screen in the modified example 4. FIG. 34 shows an example of a master / slave projection type video display device.

As shown in FIG. 34, the input image interlocking configurable light function mode menu as the menu screen in the modification 4 includes the multi-screen projection mode (master mode) as the first display mode and the third display mode. There is a multi-screen projection mode (slave mode) and a single display mode as a second display mode. Further, the input video-linked configurable light function mode menu is also provided with a mode for turning off the input video-linked configurable light function.

<< n-unit connection example 1 in the modified example 4 >>
The n-unit connection example 1 in the modification 4 will be described with reference to FIG. 35. FIG. 35 is a diagram for explaining the n-unit connection example 1 in the modified example 4.

As shown in FIG. 35, in an example of connecting n projection type video display devices 100-1, 100-2, ..., 100-n and an information processing device 300a, the first projection type video display is displayed. The device 100-1 is used as a master, and the other projection type image display devices 100-2 to 100-n are used as slaves.

The information processing device 300a outputs the input video 0 to the master projection type video display device 100-1. With this as an input, the master projection type video display device 100-1 designates trimming of video 1 and video 2 to n according to the operation input input to the operation input unit 107, and further, input video 0 is a slave. Output to the projection type image display devices 100-2 to 100-n, trimming range specification information 2 to n for specifying the trimming range for images 2 to n, and dimming calculated by calculation based on the input image 0. The control information is also output to the projection type video display devices 100-2 to 100-n, respectively. Then, the master projection type image display device 100-1 and the slave projection type image display devices 100-2 to 100-n display the images 1 and 2 to n.

In this way, when the master projection type image display device 100-1 and the slave projection type image display devices 100-2 to 100-n are projected on multiple screens, the projection type image display devices 100-1 and 100, respectively. It is possible to improve the quality of the joints of the images 1, 2, ..., N displayed by -2, ..., 100-n.

<< N-unit connection example 2 (daisy chain) in modification 4 >>
The n-unit connection example 2 (daisy chain) in the modified example 4 will be described with reference to FIG. 36. FIG. 36 is a diagram for explaining n-unit connection example 2 (daisy chain) in the modified example 4.

As shown in FIG. 36, in an example of connecting n projection type video display devices 100-1, 100-2, ..., 100-n and an information processing device 300a, the first projection type video display is displayed. The device 100-1 is used as a master, and the other projection type image display devices 100-2 to 100-n are used as slaves.

The information processing device 300a outputs the input video 0 to the master projection type video display device 100-1. With this as an input, the master projection type image display device 100-1 specifies trimming of images 1 to n according to the operation input input to the operation input unit 107, and further, the input image 0 is a slave projection type. A trimming range specification list that is a list of information that specifies the trimming range of images 2 to n other than the image 1 while being output to the image display device 100-2, and dimming control information calculated by calculation based on the input image 0 or the like. Is also output to the projection type image display device 100-2. That is, the trimming range designation list is a series of trimming range designation information that specifies the trimming range of the images 2 to n in the plurality of projection type video display devices 100-2 to 100-n of the slave. It is a list including information, and when the trimming process is performed by each projection type video display device, the corresponding trimming range designation information can be used. Subsequently, the slave projection type video display device 100-2 outputs the input video 0, the trimming range designation list, and the dimming control information to the slave projection type video display device 100-3, and ... The video display device 100- (n-1) outputs the input video 0, the trimming range designation list, and the dimming control information to the slave projection type video display device 100-n. Then, the master projection type image display device 100-1 and the slave projection type image display devices 100-2 to 100-n display the images 1 and 2 to n.

In this way, when the master projection type image display device 100-1 and the slave projection type image display devices 100-2 to 100-n are projected on multiple screens, the projection type image display devices 100-1 and 100, respectively. It is possible to improve the quality of the joints of the images 1, 2, ..., N displayed by -2, ..., 100-n.

As described above, in the modified example 4, the common dimming value can be calculated among the plurality of projection type video display devices by the processing on the side of the plurality of projection type video display devices according to this example, and the common adjustment can be calculated. A configurable optical function using optical values can be realized. Therefore, in the fourth modification, the information processing device 300a does not need to be equipped with a function for generating dimming control information, and may be a simple video output device. Further, since the information processing device 300a only needs to be connected to the projected image display device to be the master, the above-mentioned effect can be obtained even when the information processing device 300a has only one video output unit. That is, in the fourth modification, even when the information processing device 300a is a mere video output device and has only one video output system, it is possible to improve the quality of the joint of the projected video in the multi-screen projection mode.

Further, in the modification 4, each projection type video display device outputs the input video 0 as it is, and the projection type video display device in the subsequent stage trims the video, respectively. Therefore, in the master projection type video display device, the slave projection in the subsequent stage is performed. The trimming process for the type image display device becomes unnecessary. However, since the trimming range is specified by the master projection type video display device, the user does not need to set the trimming on each slave's projection type video display device, which facilitates the operation of the entire system. The above effect can also be obtained by daisy chain connection.

<Further Modifications of Modifications 3 and 4>
In the above-mentioned modification 3 and modification 4, the dimming control calculated by the input video 0 and the master projection type video display device from the projection type video display device in the front stage of the system to the projection type video display device in the rear stage. The configuration that outputs information together was explained.

However, if it is possible to perform common dimming value calculation control in all the projection type video display devices that make up the system, from the projection type video display device in the front stage of the system to the projection type video display device in the subsequent stage. It may be configured not to send dimming control information.

That is, if the dimming value calculated from the input video 0 by the projection type video display device at the rear stage of the system is the same dimming value as the projection type video display device at the front stage of the system, the same as the above-mentioned modifications 3 and 4 The effect of can be obtained.

In order to realize this, in the above-mentioned modified examples 3 and 4, the projection type video display device in the front stage of the system does not output the dimming control information, and the projection type video display device in the rear stage of the system adjusts. Instead of the dimming process according to the optical control information, the dimming process using the dimming value calculated based on the entire input image 0 (resulting in the same dimming value as the projection type image display device in the previous stage) is performed. Just do it.

<Modification 5>
Modification 5 will be described. Modification 5 is an example in which an image quality control interlocking function is added to the above-mentioned <basic example>, <modification example 1>, <modification example 2>, <transformation example 3>, and <transformation example 4>.

The image quality control interlocking function is a function of overall screen image quality control performed by the image adjustment unit 160 shown in FIG. 1 of the master projection type image display device to control the image as a whole. This feature includes gamma adjustment, bright adjustment, and contrast adjustment for the entire screen. Gamma adjustment is a process of changing the gamma curve indicating the gradation characteristics of an image. Bright adjustment is a process of changing the brightness. Contrast adjustment is a process of changing the contrast curve of an image.

In the multi-screen projection mode, the master projection type video display device generates the adjustment parameters for the overall screen image quality control at the same time when the dimming control information is generated, and outputs it to other projection type video display devices as image quality adjustment designation information. However, the other projection type video display device replaces the image quality control in each projection type video display device, or in addition to this, the overall screen image quality control based on the image quality adjustment designated information generated by the master projection type video display device. I do.

<Modification 6>
Modification 6 will be described. The modification 6 is an example in which the local image quality adjustment prohibition function is added to the above-mentioned <basic example>, <transformation example 1>, <transformation example 2>, <transformation example 3>, and <transformation example 4>.

The local image quality adjustment function is a local image quality adjustment function for adjusting the image quality for each local image performed by the image adjustment unit 160 shown in FIG. 1 of each projection type image display device, and the local image quality adjustment prohibition function is the local image quality adjustment function. This is a function that prohibits image quality adjustment. Local image quality adjustment functions include partial contrast control and Retinex control. Partial contrast control is a process of partially changing the contrast curve of an image. Retinex control is a process of decomposing an image into light components and changing the weighting of each component.

The local image quality adjustment prohibition function is forcibly turned off, for example, in the image adjustment unit 160 of each of the master projection type image display device and the slave projection type image display device during the display mode by multi-screen projection. It is composed of. (In the stand-alone display mode, the local image quality adjustment function may be configured so that the user can switch ON / OFF from the setting menu.)
The local image quality adjustment prohibition function is not essential, and depending on the local control of the image, even if the image quality adjustment is turned on, the joints are practically inconspicuous even in the projection type image display device having a different image display range. In some cases, it may be configured not to be forcibly turned off.

<Modification 7>
Modification 7 will be described with reference to FIGS. 37 to 40. In the modified example 7, the brightness of the plurality of projection type video display devices is set in the above-mentioned <basic example>, <modified example 1>, <modified example 2>, <modified example 3>, and <modified example 4>. This is an example of adding support for cases where the brightness is originally non-uniform due to individual differences of each light source (when the brightness is non-uniform even if the same video signal is input with the input video interlocking configurable light function turned off).

FIG. 37 is a diagram for explaining the configuration of the non-volatile memory in the modified example 7. As shown in FIG. 37, in the non-volatile memory 108 (or storage unit 170) shown in FIG. 1, the display element drive control program 108a that controls the drive of the display element 102 and the dimming control (lamp dimming) of the light source 105 are provided. An area is provided for storing the light source dimming control program 108b for performing the function) and the variable dimming control program 108c for performing the dimming control (variable iris function) of the variable aperture 120. In the modification 7, at least two of the three programs are stored, and the control unit 110 can expand these programs in the memory 109 and perform various controls in cooperation with each other.

As a result, the control unit 110 controls at least two of the drive control of the display element 102, the dimming control of the light source 105, and the dimming control of the variable aperture 120 as controls that can change the brightness of the projected image light. To realize.

FIG. 38 is a diagram for explaining control by the control unit 110 in the modified example 7. As shown in FIG. 38, the control unit 110 is used to bring the brightness of the projected light between a plurality of projection type video display devices closer to each other when the same video signal is input when the input video interlocking configurable light function is OFF. 1 is controlled (S1), and then a second control is performed to perform the input video-linked configurable light when the input video-linked configurable light function linked to a plurality of projection-type video display devices is ON (S2). .. In this case, the control unit 110 makes a different combination of controls used for adjusting the brightness between the first control and the second control. Further, the dimming function used in the second control is not used in the first control.

FIG. 39 is a diagram for explaining a specific example of the combination of the first control and the second control in the modification 7 described with reference to FIG. 38. As shown in FIG. 39, for example, in Example 1, the first control is the dimming control of the light source 105, and the second control is the dimming control of the variable aperture 120. The merit of this Example 1 is that the variation between the projection type video display devices at medium luminance can be reduced and the range of the display element 102 can be increased. Example 2 is the opposite of Example 1, in which the first control is dimming control of the variable aperture 120 and the second control is dimming control of the light source 105, which has the same merits as Example 1.

In Example 3, the first control is the drive control of the display element 102 (the entire screen), and the second control is the dimming control of the variable aperture 120. The merit of this Example 3 is that the variation between the projection type video display devices at medium brightness can be reduced, and the dimming control of the light source 105 can be eliminated. In Example 4, the first control is the drive control of the display element 102 (entire screen), and the second control is the dimming control of the light source 105, which eliminates the need for dimming control of the variable aperture 120. can.

In Example 5, the first control is a combination of the drive control of the display element 102 (the entire screen or the overlapping area) and the dimming control of the light source 105, and the second control is the dimming control of the variable aperture 120. The merit of this Example 5 is that it is possible to reduce the variation between projection type video display devices at medium luminance. Example 6 is a case where the first control is a combination of the drive control of the display element 102 (the entire screen or the overlapping area) and the dimming control of the variable aperture 120, and the second control is the dimming control of the light source 105. , Has the same merits as Example 5.

In Example 7, the first control is the drive control of the display element 102 (the entire screen or the overlapping area), and the second control is a combination of the dimming control of the variable aperture 120 and the dimming control of the light source 105. In Example 7, the second control may be performed by both the dimming control of the variable aperture 120 and the dimming control of the light source 105, but the same second control is performed between the variable aperture dimming of a plurality of projection type image display devices. It is necessary to use the dimming control information of 1 and to use the same second dimming control information among the light source dimming of a plurality of projection type image display devices.

FIG. 40 is a diagram for explaining the dimming characteristic of the variable diaphragm 120 in the modified example 7. As shown in FIG. 40, the dimming characteristic of the variable aperture 120 is such that the irradiance to the display element 102 is not linear with respect to the dimming control signal (drive voltage or number of steps of the variable aperture 120). This characteristic differs depending on the design of the optical system, the structure of the moving mechanism of the light-shielding plate of the variable diaphragm 120, and the motor characteristics.

If a plurality of projection type video display devices of the same model having the same dimming characteristics are prepared and the same dimming control signal is given, it is possible to easily obtain similar illuminance in the plurality of projection type video display devices. On the other hand, it is difficult to obtain a dimming control signal for obtaining a desired irradiance by calculation. It may be possible if an illuminance sensor is provided, but the cost is high.

Further, although not shown, similarly, the dimming of the light source 105 does not have a linear illuminance characteristic with respect to a control signal such as a voltage. The same applies to the above because it differs depending on the type of the light source 105 and the configuration of the power supply circuit.

In the modified example 7, since the first control is a control for reducing the variation of the irradiation light between the projection type image display devices, it is a technique for positively differentiating the control signal of the dimming function. On the other hand, the second control is a control that makes the dimming functions between the projection type video display devices have the same characteristics as much as possible. Here, if the dimming control used for the second control is used for the first control, there are a plurality of dimming control ranges (for example, the range of the dimming control signal on the horizontal axis in FIG. 40) used for the second control. It will be different between the projection type image display devices. As described with reference to FIG. 40, since the dimming characteristics of the variable aperture 120 and the dimming characteristics of the light source 105 are not linear, the dimming control range is dispersed among a plurality of projection type image display devices by the first control. Will occur as an illuminance variation in the second control.

Therefore, if the dimming function used in the second control is different from the dimming function used in the first control, as in the combination of the first control and the second control in the seventh embodiment of the present invention exemplified in FIG. 39. By making it possible, it is possible to further reduce the occurrence of illuminance variation in the second control among the plurality of projection type image display devices.

In each embodiment of the present invention described above, the dimming control by calculating the dimming value in one frame unit has been described, but if it is in the frame unit, it is not always necessary to perform the dimming value change control for each frame. Dimming value change control may be performed every few frames.

As described above, according to the projection type image display device 100 according to the embodiment of the present invention, it is possible to more preferably improve the quality of the joint of the multi-screen projection.

Further, according to the projection type image display device 100 in the present embodiment, it is possible to more preferably realize a high dynamic range of an image by multi-screen projection.

As a result, according to the projection type image display device 100 in the present embodiment, it is possible to more preferably achieve both the inconspicuousness of the joints of the images and the high dynamic range of the images at the time of multi-screen projection.

Although the invention made by the present inventor has been specifically described above based on the embodiment, the present invention is not limited to the above embodiment and can be variously modified without departing from the gist thereof. Needless to say.

Further, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to add / delete / replace a part of the configuration (basic example, each modification) of the above embodiment with another configuration.

100 (100-1 to 100-n) ... Projection type image display device, 101 ... Projection optical system, 102 ... Display element, 103 ... Display element drive unit, 104 ... Illumination optical system, 105 ... Light source, 106 ... Power supply, 107 ... operation input unit, 108 ... non-volatile memory, 109 ... memory, 110 ... control unit, 115 ... cooling unit, 120 ... variable aperture, 131 ... video signal input unit / output unit, 132 ... communication unit, 133 ... audio signal input Unit / output unit, 140 ... speaker, 160 ... image adjustment unit, 170 ... storage unit, 190 ... interface.

Claims (7)

It is a projection type video display device.
The video input section for inputting input video and
Light source and
A display element that incidents, transmits or reflects light generated by the light source, and
A projection optical system that projects light from the display element as a display image,
The first configurable light function that can change the dimming amount by changing the amount of light incident on the display element with a variable diaphragm,
Unlike the variable aperture, the second configurable light function that can change the amount of dimming by adjusting the brightness of the light source,
An interface for sending and receiving control information,
Control unit and
Equipped with
One of the multiple display modes can be selected from the menu screen.
The plurality of display modes are display modes as master devices in a plurality of projection type video devices including one master device and one or a plurality of slave devices, and the input video is trimmed. While displaying the second image having a smaller range than the input image generated by There is a first display mode for changing the amount and the dimming amount of the second configurable light function, and in the first display mode, a range of images larger than the second image is targeted from the interface. The first dimming control information capable of controlling the configurable light function by the variable aperture of the external projection type image display device, which is a slave device, which is the plurality of types of dimming control information generated based on the above calculation. The second dimming control information capable of controlling the configurable light function by adjusting the light source brightness of the external projection type image display device and the second dimming control information can be output to the external projection type image display device.
A display mode different from the first display mode, which is included in the one or more slave devices in a plurality of projection type video devices including one master device and one or a plurality of slave devices. There is a second display mode as a slave device, and in the second display mode, among the plurality of types of dimming control information generated by the master device and acquired via the interface, the plurality of types of dimming are performed. The dimming amount of the first configurable light function by the variable aperture is changed according to the first dimming control information included in the control information, and the second dimming included in the plurality of types of dimming control information. The input image is displayed while changing the dimming amount of the second configurable light function by adjusting the brightness of the light source according to the control information.
When the user selects a mode for switching from the second display mode as a slave device to the first display mode as a master device among the plurality of display modes via the menu screen, the control unit From the state of the slave device that acquires the first dimming control information and the second dimming control information from the master device via the interface for the projection type video display device including the control unit. Control is performed to switch to the state of the master device that generates the first dimming control information and the second dimming control information and outputs the second dimming control information to the slave device via the interface.
Projection type video display device. The projection type video display device according to claim 1.
The video in a range larger than the second video, which is the calculation target in the first display mode and the second display mode, is the input video.
Projection type video display device. The projection type video display device according to claim 1.
The plurality of display modes further include a third display mode for displaying the scaled image of the input image while changing the dimming amount according to the input image or the scaled image of the input image.
Projection type video display device. The projection type video display device according to any one of claims 1 to 3.
In the first display mode, the interface outputs control information for controlling an image quality adjustment function different from the configurable light function by the variable aperture and the configurable light function by the light source brightness adjustment in the external projection type image display device. ,
Projection type video display device. The projection type video display device according to claim 4.
The control information that controls the image quality adjustment function is
Control information about bright adjustment, contrast adjustment, gamma adjustment, or retinex processing,
Projection type video display device. The projection type video display device according to claim 1.
It has an image quality adjustment function capable of performing a first image quality adjustment process that uniformly affects the entire input image and a second image quality adjustment process in which the image quality adjustment for the input image is locally different.
In the first display mode and the second display mode, there is a state in which the execution of the first image quality adjustment process is permitted and the execution of the second image quality adjustment process is prohibited.
Projection type video display device. The projection type video display device according to claim 3.
It has an image quality adjustment function capable of performing a first image quality adjustment process that uniformly affects the entire input image and a second image quality adjustment process in which the image quality adjustment for the input image is locally different.
In the third display mode, there is a state in which both the execution of the first image quality adjustment process and the execution of the second image quality adjustment process are permitted.
Projection type video display device.

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