JP6515169B2 - Projection type video display - Google Patents

Description

  The present invention relates to a projection type video display.

  As a projection type video display device, a device provided with a light source, a display element to which light generated by the light source is incident, and a modulated light function to change the amount of light incident on the display element is known. For example, in Patent Document 1, in a lighting apparatus used for a projection type display apparatus, a light source, uniform lighting means for equalizing the illuminance distribution of light incident from the light source, and tuning for adjusting the light quantity of light emitted from the light source An apparatus is disclosed comprising a light means. Patent Document 1 describes that the amount of light emitted from the uniform illumination unit can be adjusted by controlling the light adjustment unit based on information from the outside.

International Publication No. 03/032080

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

  In the usage mode in which such a plurality of projection type video display devices are projected on multiple screens, since the input video of each projection type video display device is different, the illuminance at the joint of multi screen projection is adjusted to be close It is necessary to improve the quality of joints.

  In the technique of Patent Document 1 described above, although the light quantity of light emitted from the uniform illumination means can be adjusted by controlling the light adjustment means, the control of the light adjustment means in the usage form by multi-screen projection Is not considered.

  An object of the present invention is to provide a projection type video display apparatus which improves the quality of joints of projection video in multi-screen projection.

  The above and other objects and novel features of the present invention will be apparent from the description of the present specification and the accompanying drawings.

  The outline of typical ones of the inventions disclosed in the present application will be briefly described as follows.

  The projection type image display apparatus according to one embodiment includes an image input unit for inputting an input image, a light source, a display element for receiving light generated by the light source and transmitting or reflecting light, and a display image for light from the display element And a variable modulation light function of changing the amount of light incident on the display element. A plurality of display modes using the variable modulation light function are provided, and one of the plurality of display modes can be selected from the menu screen. Then, in the display mode of the display image using the variable modulation light function, the light control amount is input from the external device according to the light adjustment control information capable of controlling the variable modulation light function in units of one frame of the projection image. There are a first display mode in which an input video is displayed while changing, and a second display mode in which an input video is displayed while changing the light control amount according to the input video.

  Another projection type image display apparatus according to one embodiment includes an image input unit for inputting an input image, a light source, a display element for receiving light generated by the light source and transmitting or reflecting light, and light from the display element. It has a projection optical system for projecting as a display image and a modulated light function for changing the amount of light incident on the display element. A plurality of display modes using the variable modulation light function are provided, and one of the plurality of display modes can be selected from the menu screen. Then, in the display mode of the display video using the variable modulation light function, the second video having a smaller range than the input video generated by performing the trimming processing on the input video is displayed while being larger than the second video. There is a display mode in which the light control amount is changed according to the calculation for the image of the range.

  The effects obtained by typical ones of the inventions disclosed in the present application 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 joints of projection images at the time of multi-screen projection.

It is a block diagram which shows an example of an internal structure of the projection type video display apparatus in one embodiment of this invention. It is a figure for demonstrating the example of the multi-screen projection by "overlapless projection". It is a figure for demonstrating the example of the multi-screen projection by "overlap projection". It is a figure for demonstrating the structural example of the conventional multi-screen projection system. It is a figure for demonstrating the example of the multi-screen projection of [overlapping none projection + input image interlocking changeable light non-functional function]. It is a figure for demonstrating the subject of [overlapping none projection + input image interlocking modifiable light function in prior art]. It is a figure for demonstrating the example of the multi-screen projection of [overlapping projection + input image interlocking changeable light non-functional function]. It is a figure for demonstrating the subject of [overlapping projection + input video interlocking modifiable light function of conventional technology]. It is a figure for demonstrating the operation | movement concept of [overlapping none projection + input video interlocking modifiable light function of this embodiment]. It is a figure for demonstrating the operation | movement concept of [overlapping projection + input video interlocking modifiable light function of this embodiment]. FIG. 7 is a diagram for describing a configuration of a basic example in the embodiment of the present invention. FIG. 5 is a diagram for explaining a projection type video display device in a basic example in the embodiment of the present invention. FIG. 7 is a diagram for explaining a menu screen in a basic example according to an embodiment of the present invention. FIG. 6 is a diagram for explaining an example of n connection in a basic example in the embodiment of the present invention. FIG. 8 is a diagram for describing a configuration of a modification 1 in the embodiment of the present invention. FIG. 10 is a diagram for describing a projection type video display device in a modification 1 according to an embodiment of the present invention. FIG. 13 is a diagram for explaining a menu screen in a modification 1 in the embodiment of the present invention. FIG. 16 is a diagram for describing an example of n-unit connection in a modification 1 according to an embodiment of the present invention. FIG. 14 is a diagram for describing a configuration of modification 2 in the embodiment of the present invention. FIG. 21 is a diagram for describing a master projection type video display device in Modification 2 in the embodiment of the present invention. FIG. 8 is a diagram for describing an example of a data format in the embodiment of the present invention. FIG. 21 is a diagram for describing a projection type image display device of a slave in a modification 2 according to an embodiment of the present invention. FIG. 21 is a diagram for describing a menu screen in a modification 2 according to an embodiment of the present invention. FIG. 21 is a diagram for describing an example of n connection in a modification 2 in the embodiment of the present invention. FIG. 17 is a diagram for describing a configuration of modification 3 in the embodiment of the present invention. FIG. 21 is a diagram for describing a master projection-type image display device according to Modification 3 in an embodiment of the present invention. FIG. 21 is a diagram for describing a projection type image display apparatus of a slave in a modification 3 in the embodiment of the present invention. FIG. 21 is a diagram for describing a menu screen in a modification 3 according to an embodiment of the present invention. FIG. 21 is a diagram for describing an n-unit connection example 1 in a modification 3 according to an embodiment of the present invention. FIG. 21 is a diagram for describing an n-unit connection example 2 (daisy chain) in the modification 3 according to the embodiment of the present invention. FIG. 18 is a diagram for describing a configuration of modification 4 in the embodiment of the present invention. FIG. 21 is a diagram for describing a master projection-type image display device in a modification 4 according to an embodiment of the present invention. FIG. 21 is a diagram for describing a projection type image display apparatus of a slave in a modification 4 according to an embodiment of the present invention. FIG. 21 is a diagram for describing a menu screen in a modification 4 according to an embodiment of the present invention. FIG. 21 is a diagram for describing an n-unit connection example 1 in a modification 4 according to an embodiment of the present invention. FIG. 21 is a diagram for describing an n-unit connection example 2 (daisy chain) in the modification 4 according to the embodiment of the present invention. FIG. 21 is a diagram for describing a configuration of a non-volatile memory according to a seventh modification in an embodiment of the present invention. FIG. 21 is a diagram for describing control by a control unit in a modification 7 according to an embodiment of the present invention. FIG. 21 is a diagram for describing a combination example of the first control and the second control in the modification 7 according to the embodiment of the present invention. FIG. 21 is a view for explaining the light control characteristic of the variable stop in the modification 7 according to the embodiment of the present invention.

  In the following embodiments, when it is necessary for the sake of convenience, it will be described by dividing into a plurality of sections or embodiments, but unless specifically stated otherwise, they are not mutually unrelated, one is the other And some or all of the variations, details, supplementary explanations, etc. Further, in the following embodiments, when referring to the number of elements (including the number, numerical value, quantity, range, etc.), it is particularly pronounced and clearly limited to a specific number in principle. It is not limited to the specific number except for the number, and may be more or less than the specific number.

  Furthermore, in the following embodiments, the constituent elements (including element steps and the like) are not necessarily essential except when particularly clearly shown and when considered to be obviously essential in principle. Similarly, in the following embodiments, when referring to the shapes, positional relationships and the like of components etc., the shapes thereof are substantially the same unless clearly stated otherwise and in principle considered to be otherwise apparently. Etc. shall be included. The same applies to the above numerical values and ranges.

  Hereinafter, one embodiment will be described in detail based on the drawings. In the drawings for describing the embodiment, the same members are denoted by the same reference symbols in principle, and the repeated description thereof will be omitted.

[One embodiment]
The projection type video display apparatus in one Embodiment is demonstrated using FIGS.

<Projection type image display device>
The projection type video display apparatus in this Embodiment is demonstrated using FIG. FIG. 1 is a block diagram showing an example of an internal configuration of a projection display apparatus 100 according to the present embodiment.

  The projection type image display apparatus 100 in 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. 109, and the control unit 110. Furthermore, the projection type video display apparatus 100 according to the present embodiment includes the cooling unit 115, the video signal input unit / output unit 131, the communication unit 132, the audio signal input unit / output unit 133, the speaker 140, the image adjustment unit 160, and A storage unit 170 is provided. The illumination optical system 104 includes a variable stop 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 externally input AC current into a DC current to supply power to the light source 105. Furthermore, the power supply 106 supplies necessary DC current to the other components. The illumination optical system 104 condenses the light generated by the light source 105, makes it more uniform, and irradiates the display element 102. The cooling unit 115 cools each portion, such as the light source 105, the power supply 106, or the display element 102, which is in a high temperature state, by an air cooling method or a liquid cooling method as necessary.

  The display element 102 is an element that transmits or reflects the 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, a DMD (Digital Micromirror Device) : A registered trademark panel or the like is used. 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 through the video signal input unit / output unit 131, and the image adjustment unit 160 performs an image on the input video signal. The adjusted video signal may be used, or a signal obtained by superimposing the OSD image signal generated by the control unit 110 using an image stored in the non-volatile memory 108 or the storage unit 170 may be referred to. An optical image generated by the display element 102 modulating light according to drive signals generated by the display element drive unit 103 with reference to these input video signals is transmitted to the display surface 200 as a display image by the projection optical system 101. Projected

  The operation input unit 107 is a light receiving unit of an operation button or a remote control, and inputs an operation signal from the user.

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

  The interface 190 will now be described. The interface 190 is an interface that connects the projection type video display device 100 and the external device 400 (for example, a video / audio output / input device, an information processing device, or another projection type video display device) and transmits / receives various data between them. is there.

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

  The video signal input unit / 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 apparatus 100 from the external device 400A connected by the interface 190A. The same interface may have a function of outputting video data. 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 a video and also as a video output unit for outputting a video.

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

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

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

  Configuration and processing of a video signal input unit / output unit 131B, an audio signal input unit / output unit 133B, and a communication unit 132B which also constitute a part of the interface 190B and the interface 190B that connect the projection type video display device 100 and the external device 400B. 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 constitute part of the above-described interface 190A and interface 190A are also omitted Do. Note that although an example in which the projection type image display apparatus 100 has two interfaces 190A and 190B as the interface 190 is shown in this figure, it may be configured to have only one of them, and the same configuration is provided. Three or more interfaces may be provided. In that case, in addition to the interface 190A and the interface 190B, the interface 190C, the interface 190D,..., The interface 190N may be increased according to the design needs.

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

  The image adjustment unit 160 performs image processing on the video data input by the video signal input unit / output unit 131. As the image processing, for example, scaling processing that performs enlargement, reduction, deformation, etc. of the image, bright adjustment processing that changes the luminance, contrast adjustment processing that changes the contrast curve of the image, and gamma curve that indicates gradation characteristics of the image There are gamma adjustment processing to be changed, and retinex processing for decomposing an image into light components and changing weight of each component.

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

  The variable stop 120 is, for example, a mechanism including a movable light shielding plate capable of shielding a part of the light 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. Light control value calculated based on the image (for example, the light blocking ratio or the number of steps of the aperture) or the light control value calculated based on the control signal received from the communication unit 132 (for example, the light blocking ratio or the number of steps of the aperture) Accordingly, the amount of light shielding can be varied by changing (moving, rotating) the position or angle of the light shielding plate. The change of the position and the angle of the light blocking plate may be performed by the change of the input voltage value to the driving portion of the light blocking plate or the change of the number of pulses inputted to the driving portion of the light blocking plate.

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

<Input video interlocking modulation light function>
Next, the input video interlocking modulated light function of the projection type video display device 100 shown in FIG. 1 will be described. The projection type video display apparatus 100 has, for example, three means for changing the luminance of the projection video. The first one is the display element 102. The second one is a variable stop 120, which realizes dimming by changing the amount of light blocking in the light path of the illumination optical system 104 described above. The third is a power source 106 for a light source. The power supply 106 is received from the light control value (for example, the light blocking ratio or the number of steps of the diaphragm) calculated based on the video 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 light control value (for example, the light blocking ratio and the number of steps of the diaphragm) calculated based on the control signal to be controlled, the brightness of the light source 105 is changed to realize light control.

  A function to control the light control amount in conjunction with the input video, that is, a so-called "input video interlockable modulated light function" (also referred to simply as a "modulatable light function") is required.

  Therefore, the concept of “input image interlocking modifiable light function” in the present embodiment does not include the luminance change itself of the projection image due to the light modulation by the display element 102. Of the light adjustment functions other than the light modulation by the display element 102 (for example, the light modulation of the variable aperture 120 and the voltage-modulated light of the power supply 106 for the light source), the light adjustment amount linked to the calculated value derived from the input image Is included in the concept of "input image interlocking modifiable light function". The function to realize the light blocking light control of the variable aperture 120 is also referred to as “variable iris function”. The function to realize the voltage-modulated light of the power supply 106 for the light source is also referred to as "lamp dimming function".

  As described above, by performing light control using functions other than light modulation by the display element 102, the dynamic range of an image can be expanded more than the dynamic range of light modulation of the display element 102.

  In addition, there is provided a plurality of projection type video display devices 100, and the plurality of projection type video display devices 100 respectively project the video on the display surface, and one continuous input video is projected as a whole (multi-screen projection There is a use form). The multi-screen projection includes “non-overlapping projection” that projects on the display surface so that adjacent images do not overlap, and “overlapped projection” that projects on the display surface so that adjacent images overlap. Although the concept of “non-overlapping projection” includes projections where a plurality of images are adjacent to each other so as not to overlap each other, it does not require that adjacent images do not overlap exactly at all. It does not mean to completely eliminate the situation where some overlap slightly. That is, without adjusting the brightness of a plurality of images in the "superimposed portion" of the "overlap projection" described in the following description of the present embodiment, a plurality of images are projected adjacently without overlapping as much as possible. is there. In that sense, of the types of multi-screen projection in the following description of the present embodiment, “non-overlapping projection” may be expressed as “projection without luminance adjustment of overlapping portion”. Similarly, "overlapping projection" may be expressed as "brightness adjusted projection of overlapping portion". In such a usage form, it is necessary to be careful not to make unnatural joints in video in multi-screen projection in each of the plurality of projection type video display devices 100.

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

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

  An example of displaying a gradation image to be a target in [No overlap projection] of the image 1 and the image 2 will be described with reference to FIG.

  FIG. 2 shows the case where the input image which is the original image has an average luminance value = 50 in the overlapless projection of the images of the two projection type video display devices. Also, the image 1 is 1000 pixels (position of 0 to 1000 pixels), and the image 2 is 1000 pixels (position 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 screen position is 0 pixel, the luminance value is 0, and the screen position is 2000 pixels. The luminance value is 100 at the position of 1, and if it can be displayed with a linearly increasing characteristic, the joint between the image 1 and the image 2 will not be unnatural.

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

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

  FIG. 3 shows the case where the input image which is the original image has an average luminance value of 50 in the overlapping projection of the images of the two projection type image display devices. Also, the image 1 corresponds to 1200 pixels (position of 0 to 1200 pixels), and the image 2 corresponds to 1200 pixels (position of 800 to 2000 pixels). The overlapping portion of the video 1 and the video 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 screen position is 0 pixel, the luminance value is 0, and the screen position is 2000 pixels. The luminance value is 100 at the position of 1, and if it can be displayed with a linearly increasing characteristic, the joint between the image 1 and the image 2 will not be unnatural.

  Next, description will be made using an example in which display of a target gradation image described in FIG. 2 is attempted using a conventional projection type image display device.

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

  However, when the variable modulation light function (lamp light control function, variable iris function) is performed according to the input image of each projection type image display device 90-1 and 90-2, each projection type image display device 90-1 Since the black luminance and the white luminance 90-2 change, and the connection of the luminance at the joints becomes unnatural, it has been necessary to turn off the input image interlockable modulation light function conventionally.

  In the following, an example in which the input video interlocking modifiable light function is turned on and off in multi-screen projection in a conventional projection type video display device will be described in comparison with each other.

<< [No overlap projection + input video interlocking modulation light function not included] >>
First, an example in which the target gradation display is attempted in the state of “non-overlap projection + input image interlocking modifiable light function” will be described with reference to FIG.

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

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

  In the relationship between the screen position of the image 2 (position of 1000 to 2000 pixels) 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. , And linearly increasing characteristics.

  As described above, when the variable modulation light function is turned off or when the function is not present, the target gradation display can be reproduced, and the seam between the video 1 and the video 2 can be made natural.

<< Problem: [Overlap projection + prior art input video interlocking modulation light function] >>>
Next, a problem in the case of attempting to display a target gradation in the state of [non-overlapping projection + input image interlocking modifiable light function in the prior art] will be described with reference to FIG.

  FIG. 6 shows a non-overlapping projection of the video 1 of the projection type video display 90-1 and the video 2 of the projection type video display 90-2, which has a modulated light function interlocked with the input video of the prior art, This is when the function is ON.

  Here, the input video interlocking modifiable light function of the prior art will be described using an example of a general function of changing the light control amount in conjunction with the average luminance of the input video signal. In order to simplify the explanation, the luminance value of the input image is in the range of 0 to 100, and if the average luminance is 0, the modulated light quantity is 0%, if the average luminance is 100, the modulated light quantity is 100%, and the intermediate modulated light quantity is It should be proportional to the average brightness.

  In addition, the image 1 has an input average luminance value = 25 for 1000 pixels (positions of 0 to 1000 pixels). The image 2 has an input average luminance value = 75 for 1000 pixels (a position of 1000 to 2000 pixels). The input average luminance value is set to 50 for the entire image (position of 0 to 2000 pixels).

  In this case, since the average input luminance value input to the projection type video display 90-1 is 25, the light control rate by the variable modulation function of the projection type video display 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 (without light control function × 0.25), the luminance value is 0 when the screen position is 0 pixel and the screen position is At a position of 1000 pixels, the luminance value is 12.5, which is a linearly increasing characteristic.

  Further, since the average input luminance value input to the projection type video display device 90-2 = 75, the light control rate by the variable modulation function of the projection type video display device 90-2 is 75%. Therefore, in the relationship between the screen position of the image 2 (the position of 1000 to 2000 pixels) and the luminance value (without the light control function × 0.75), the luminance value is 37.5 at the position of 1000 pixels of the screen position. When the position is 2000 pixels, the luminance value is 75, which is a characteristic that increases linearly.

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

<< [Overlap projection + input video interlocking modulation light function not included] >>
Next, an example in which the target gradation display is attempted in the state of [overlap projection + input video interlocking modifiable light function] will be described with reference to FIG. The system configuration example is the same as that shown in FIG.

  FIG. 7 shows the case where the light control function interlocked with the input image is turned off in the 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 (or When there is no function).

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

  In the relationship between the screen position of the image 2 (position of 800 to 2000 pixels) and the luminance value, the luminance value is 0 when the screen position is 800 pixels, and the luminance value is 60 when the screen position is 1200 pixels. When the screen position is 2000 pixels, the luminance value is 100, and when the screen position is 800 to 1200 pixels, the characteristic increases linearly. When the screen position is 120 to 2000 pixels, the characteristic increases linearly. This is a characteristic that increases more slowly than the range of 800 to 1200 pixels.

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

  As described above, when the variable modulation light function is turned off or there is no such function, the target gradation display can be reproduced even in the case of overlapping and projection, and the seam between the image 1 and the image 2 should be made natural. Can.

<< Problem: [Overlay projection + prior art input video interlockable modulated light function] >>
Next, a problem in the case of attempting to display a target gradation in the state of [overlap projection + input image interlocking modifiable light function in the prior art] will be described with reference to FIG.

  FIG. 8 shows a light control function interlocked with the input image in the prior art, in addition to the overlapping and 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. , When the function is ON.

  It is assumed that the input video interlocking modulated light function of the prior art exemplified here is the same as the input video interlocking modulated light function of the prior art described with reference to FIG.

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

  In this case, since the average input luminance value input to the projection type video display 90-1 is 30, the light control rate by the variable modulation function of the projection type video display 90-1 is 30%. Therefore, in the relationship between the screen position of the image 1 (position of 0 to 1200 pixels) and the luminance value (without light control function × 0.3), the luminance value is 0 at the position of 0 pixel and the screen position is 0 At a position of 800 pixels, the luminance value is 15, the position at a screen position is 1200 pixels, the luminance value is 0, and in a range of 0 to 800 pixels, the screen position increases linearly. In the range of, the characteristic decreases linearly.

  Further, since the average input luminance value input to the projection type video display 90-2 is 70, the light control rate by the variable modulation function of the projection type video display 90-2 is 70%. Therefore, in the relationship between the screen position of the image 2 (position of 800 to 2000 pixels) and the luminance value (without light control function x 0.7), the luminance value is 0 at the position of 800 pixels and the screen position is The luminance value is 52.5 at the position of 1200 pixels, the luminance value is 70 at the position of the screen position of 2000 pixels, and linearly increases in the range of the screen position of 800 to 1200 pixels. In the range of 2000 pixels, the characteristics increase linearly (characteristics that increase more slowly than 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 when the screen position is 0 pixel, and 50 when the screen position is 2000 pixel. It should be a linearly increasing characteristic. On the other hand, in the example of FIG. 8, in the relationship between the screen position (position of 0 to 2000 pixels) and the synthesized output luminance value in the case where image 1 and image 2 are synthesized, the position of screen position is 0 to 800 pixels. And at the position of 1200 to 2000 pixels, the characteristic increases linearly, but at the position of 800 to 1200 pixels in the overlapping portion, the combined output luminance value becomes a characteristic that linearly increases from 15 to 52.5. That is, the composite output luminance value deviates from the target luminance value, and the luminance change around the portion of overlapping portions 800 to 1200 pixels, which is the seam of the image, is unnatural.

  As described above, in the conventional projection type video display apparatus, when multi-screen projection is performed, when the input video interlocking modifiable light function is turned on, the luminance change around the seam becomes unnatural, so the input video interlocking It was necessary to turn off the tunable light function. Therefore, in multi-screen projection, it has not been easy to obtain the effect of expanding the dynamic range of an image by the input image interlocking adjustable light function.

<A solution to the problem of multi-screen projection>
Next, a solution means for solving the problem of the above multi-screen projection will be described. The above-described multi-screen projection by the conventional projection type video display device has a problem that the joint between the video 1 and the video 2 becomes unnatural, and the present embodiment solves it as follows.

  In this embodiment, at the time of multi-screen projection, common dimming values are set using parameters based on video portions (for example, the entire input video) in a range larger than divided video units, not dimming of divided video units. By using the common light control value in common to a plurality of projection type video display devices, it is possible to make the light control rate between the plurality of projection type video display devices closer to each other, and operate the light control function. Also, it is possible to make the boundaries (joints, boundaries) of multi-screen projection less noticeable. Specifically, it is as follows.

<< Solution: [Non-overlapping projection + input video interlocking modifiable light function of this embodiment] >>
The operation concept of [non-overlap projection + input video interlocking modifiable light function of this embodiment] for solving the conventional problem will be described with reference to FIG.

  FIG. 9 shows an operation example capable of solving the problem in << Problem: Non-overlapping projection + Input image interlockable modulation light function of prior art in the case of gradation display >> shown in FIG. 6 described above. ing.

  The input video interlocking modifiable light function of the present embodiment in FIG. 9 realizes, for example, the configuration of the “input video interlocking modifiable light function” described in the description of FIG. A function (variable iris function) or a function (lamp dimming function) for realizing voltage-variable modulation of the power supply 106 for the light source is applied.

  In the input video interlocking modulated light function of the present embodiment, an input average luminance value of a video (for example, whole video) larger than each video is commonly used for both the video 1 and the video 2. Thereby, the combined output luminance value is made to approach the target luminance value.

  In FIG. 9, the image 1 has an input average luminance value = 25 for 1000 pixels (positions of 0 to 1000 pixels). The image 2 has an input average luminance value = 75 for 1000 pixels (a position of 1000 to 2000 pixels). The input average luminance value is set to 50 for the entire image (position of 0 to 2000 pixels).

  In this case, the relationship between the screen position (position of 0 to 2000 pixels) and the composite output luminance value when video 1 and video 2 are composited is shown by a broken line in the input video interlocking modifiable light function of the prior art. As described above, since the composite output luminance value changes from 12.5 to 37.5 at a 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 modifiable light function of the present embodiment, calculation is performed based on the respective input average luminance values of image 1 (input average luminance value = 25) and image 2 (input average luminance value = 75). The light control value calculated based on the input average luminance value = 50 of the entire video larger than the video 1 and the video 2 without separately applying the light control values (25% and 75% in the example of FIG. 6) 50%) is commonly used for both picture 1 and picture 2. As a result, as indicated by the solid line, the luminance value is 0 at the screen position of 0 pixel and the luminance value is 50 at the screen position of 2000 pixels, and the characteristics increase linearly. As a result, the composite output luminance value approaches the target luminance value, and the change in luminance near the screen position of 1000 pixels, which is the seam of the screen, becomes more natural.

<< Solution: [Overlap projection + input video interlockable modulated light function of this embodiment] >>
Next, the operation concept of [overlap projection + input video interlockable modulated light function of the present embodiment] for solving the conventional problem will be described also with [overlap projection] with reference to FIG.

  FIG. 10 shows an operation example capable of solving the problem in << Problem: projection with overlapping + input image interlocking modulation light function in the prior art in the case of gradation display shown in FIG. 8 described above >> ing.

  Similarly to the example of FIG. 9, the input video interlocking modifiable light function of the present embodiment in FIG. 10 is, for example, the configuration of “input video interlocking modifiable light function” described in the description of FIG. A function (variable iris function) for realizing the light blocking dimming control or a function (lamp dimming function) for realizing the voltage variable modulation light of the power source 106 for the light source is applied.

  Also in the input video interlocking modulated light function of the present embodiment, the input average luminance value of the video (for example, the entire video) larger than each video is commonly used for both the video 1 and the video 2. Thereby, the combined output luminance value is made to approach the target luminance value.

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

  In this case, the relationship between the screen position (position of 0 to 2000 pixels) and the composite output luminance value when video 1 and video 2 are composited is shown by a broken line in the input video interlocking modifiable light function of the prior art. As described above, since the composite output luminance value increases linearly from 15 to 52.5 at the position of 800 to 1200 pixels in the overlapping portion, the composite output luminance value deviates from the target luminance value, and The seam of the screen position of 800 to 1200 pixels in the overlapping portion was unnatural.

  On the other hand, in the input video interlocking modifiable light function of the present embodiment, calculation is performed based on the respective input average luminance values of image 1 (input average luminance value = 30) and image 2 (input average luminance value = 70). The light control value (30% and 70% in the example of FIG. 6) is calculated separately based on the input average luminance value = 50 of the entire video larger than the video 1 and the video 2 without applying separately 50%) is commonly used for both picture 1 and picture 2. As a result, as indicated by the solid line, the luminance value is 0 at the screen position of 0 pixel and the luminance value is 50 at the screen position of 2000 pixels, and the characteristics increase linearly. As a result, the synthetic output luminance value approaches the target luminance value (without the light control function x 0.5), and the luminance change near the screen position of 800 to 1200 pixels in the overlapping portion which is the seam of the screen is more natural. become.

  <Basic Example>, <Modification Example 1>, <Modification Example 2>, <Modification Example 3>, <Modification Example 4>, <Modification Example 5> to which the <Solution means for multi-screen projection problem> described above is applied The following describes, in order, <Modification 6> and <Modification 7>. Note that these basic examples and modifications are applicable to any of the above-mentioned [non-overlapping projection] and [overlapping projection].

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

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

  The connection between the projection type video display apparatus and the information processing apparatus described in FIG. 11 and the following drawings and the connection between the plurality of projection type video display apparatuses are all performed using, for example, the connection by the interface 190 described in FIG. Just do it. In this way, in each connection, not only transmission and reception of video but also transmission and reception of control information can be performed.

  The information processing device 300a is an input to be displayed on each of the projection type video display devices 100-1 and 100-2 based on the input video 0 to be multi-screen projected by both of the projection type video display devices 100-1 and 100-2. Generate images 1 and 2. In addition, the information processing device 300a performs the light control amount control by the calculation using the entire input video 0, which is a range wider than the respective ranges of the input videos 1 and 2 displayed by the projection type video display devices 100-1 and 100-2. Are determined, and information (light adjustment control information) for specifying the light adjustment amount is also generated.

  Then, the information processing device 300a outputs, to the projection type video display device 100-1, the input video 1 displayed by the projection type video display device 100-1 and the light adjustment control information. With this as an input, the projection type video display device 100-1 displays the video 1 while changing the light control amount based on the light control control information. Similarly, the information processing device 300 a outputs, to the projection type video display device 100-2, the input video 2 displayed by the projection type video display device 100-2 and the light adjustment control information. With this as an input, the projection-type image display device 100-2 displays the image 2 while changing the light control amount based on the light control control information. The light adjustment control information transmitted to the projection type video display device 100-1 and the projection type video display device 100-2 stores the shared light control value, and this is the projection type video display device 100-1 and the projection. It is used in common to both of the type image display apparatus 100-2.

  The effect of the configuration of the basic example is the difficulty in visualizing the joint between the video 1 displayed by the projection video display 100-1 and the video 2 displayed by the projection video display 100-2 during multi-screen projection, and the video The high dynamic range of the entire multi-screen projection video of 1 and video 2 can be compatible.

<< Projection type image display device in the basic example >>
The projection type video display apparatus in a basic example is demonstrated using FIG. FIG. 12 is a view for explaining a projection type video display apparatus in the basic example.

  As shown in FIG. 12, as a projection type video display device in the basic example, a projection type video display device 100-1 will be described as an example. The projection type image display apparatus 100-1 has a variable modulation light function (a lamp light adjustment function, an input image interlocking modulation light function with variable iris function), and has a plurality of display modes using the variable modulation light function. One of the display modes can be selected from a menu screen displayed by being superimposed on the projection video.

  Then, in the display mode using the variable modulation light function, the dimming amount is changed according to the light adjustment control information which can be controlled by the variable modulation light function in units of one frame of the projection image, which is input from the information processing device 300a. There is a first display mode for displaying the input video 1 while. That is, in the first display mode, the amount of light adjustment is varied according to the input light adjustment control information. The first display mode is a display mode (multi-screen projection mode) used at the time of multi-screen projection described above.

  Furthermore, in the display mode using the variable modulation light function, the light control amount according to the input video 1 input to the projection type video display 100-1 in order to use the projection type video display 100-1 alone. There is a second display mode in which the input video 1 is displayed while changing. That is, the calculation target of the light modulation amount calculation in the second display mode is an input video to the projection type video display device 100-1 as shown in FIG. The second display mode is a display mode (a single display mode) when the projection type video display device 100-1 is used alone.

<< Menu Screen in 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 the basic example.

  As shown in FIG. 13, the input video interlocking modifiable light function mode menu as a menu screen in the basic example includes a multi-screen projection mode as a first display mode and an independent display mode as a second display mode. There is. Furthermore, the input video link interlockable modulation light function mode menu also includes a mode for turning off the input video interlocking modulation light function. These modes may be configured to be alternatively selected by moving the cursor based on the operation input to the operation input unit 107.

  In the configuration of this basic example, as an image quality adjustment function, an image quality control interlocking function of <Modification 5> described later and a local image quality adjustment prohibition function of <Modification 6> can be added. For example, in the first display mode, execution of the first image quality adjustment process (image quality control interlocking function of <Modification 5>) uniformly affecting the entire input video is permitted, and the image quality adjustment for the input video is local A second image quality adjustment process (local image quality adjustment prohibition function of <Modification 6>) different from the above may be prohibited. In addition, in the second display mode or the mode in which the input video interlockable modulated light function is OFF, execution of the first image quality adjustment processing and the second image quality adjustment processing may be permitted.

  Further, in the configuration of this basic example, even when the input video interlocking modifiable 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 not uniform. As a response to this, the function of <Modification 7> described later can be added. For example, the projection type image display apparatuses 100-1 and 100-2 are controlled by the light control means different from the light control means used for the input video interlocking adjustable light function (the second control of <Modification 7>) Of the second modifiable light function (the first control of <Modification 7>). The second modifiable light function uses the modulatable light function when displaying both related images simultaneously by using the projection type video display device 100-1 and the other projection type video display device 100-2. This is a variable modulation light function used to make the boundary between the two projected images inconspicuous when it is turned off. And the light control means used for the light modulation function is not used for the second light modulation function.

  The additional functions of <Modification 5>, <Modification 6> and <Modification 7> are not limited to <Basic example>, but will be described later <Modification 1>, <Modification 2>, <Modification 3 The same applies to the configurations of> and <Modification 4>.

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

  As shown in FIG. 14, in the example in which n pieces of projection type video display devices 100-1, 100-2,..., 100-n and the information processing device 300a are connected, the information processing device 300a is a projection type Input video 1, 2,..., N to be displayed on each of the video display devices 100-1, 100-2,. The information processing device 300a also generates light adjustment control information for specifying a light adjustment amount common to the projection type image display devices 100-1, 100-2,..., 100-n. Then, the information processing apparatus 300a outputs the input video 1, 2, ..., n and the light adjustment control information to each of the projection type video display apparatuses 100-1, 100-2, ..., 100-n. . Each of the projection type image display devices 100-1, 100-2,..., 100-n receives the light control amount based on the light control control information specifying the light control value common to all the devices. To change the display image 1, 2 ... n.

  In this way, when multi projection of the n projection type video display devices 100-1 to 100n is performed, the video 1 displayed by the projection type video display device 100-1 and the projection type video display device 100-2 are displayed. Of the image 2 displayed by the projection type image display apparatus 100-2 and the image 3 displayed by the projection type image display apparatus 100-3, ..., the projection type image display apparatus 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 modifications will be described, but in any of the modifications, the description of the same parts as the operations and processes described in the basic example will be omitted in order to avoid duplication of description.

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

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

  The information processing device 300a outputs the input video 0 to be multi-screen projected by both of the projection type video display devices 100-1 and 100-2 to the projection type video 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 light control amount according to the whole of the input video 0, but among the input video 0, the respective projection type video display devices 100-1 , And 100-2 to display partial trimmed video 1 and 2 (video 1 and 2 trimmed from the input video 0). That is, in the multi-screen projection mode, the light control amount is determined by calculation using the entire input video 0, which is a range wider than the range displayed by the projection type video display devices 100-1 and 100-2, and the projection type video display The same operation is used in the device 100-1 and the projection type video 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 the calculation for the same video (input video 0), the projection type video display device 100-1 and the projection type video The dimming value is shared with the display device 100-2. Therefore, the quality of the joint of the projection image of these devices in the multi-screen projection mode can be improved.

  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 in order to make other settings such as image quality common. .

<< Projection type image display device in modification 1 >>
The projection type video display apparatus in the modification 1 is demonstrated using FIG. FIG. 16 is a view for explaining a projection type video display device in the first modification.

  As shown in FIG. 16, as a projection type video display apparatus in the first modification, a projection type video display apparatus 100-1 will be described as an example. The projection type image display apparatus 100-1 has a variable modulation light function (a lamp light adjustment function, a variable iris function), has a plurality of display modes using the variable modulation 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 variable modulation light function, trimming is performed from the input image 0 while changing the light control amount according to the calculation for the input image 0 input to the projection type image 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. The first display mode is a multi-screen projection mode.

  Also, in the display mode using the variable modulation light function, the light control amount is changed according to the calculation for the input video 0 input to the projection type video display device 100-1 or the video X obtained by scaling this. There is a second display mode for displaying a video X obtained by scaling the input video 0 while. In FIG. 16, an image X obtained by scaling (reducing) the input image 0 is set as a calculation target. The second display mode is a single display mode.

  In the projection type video display apparatus 100-1 in the modification 1, the output to the other projection type video display apparatus 100-2 does not necessarily have to be, and the output may not be.

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

  As shown in FIG. 17, in the input video interlocking modifiable light function mode menu as the menu screen in the modification 1, the multi-screen projection mode as the first display mode and the single display mode as the second display mode There is. Furthermore, the input video link interlockable modulation light function mode menu also includes a mode for turning off the input video interlocking modulation light function.

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

  As shown in FIG. 18, in the example in which n pieces of projection type video display devices 100-1, 100-2,..., 100-n and the information processing device 300 a are connected, the information processing device 300 a is a projection type The input video 0 is output to each of the video display devices 100-1, 100-2, ..., 100-n. Each of the projection type image display devices 100-1, 100-2,..., 100-n determines the light control amount according to the whole of the input video 0. .., N which are set by the projection type image display devices 100-1, 100-2,..., 100-n, ie, the images 1, 2,. Display

  In this way, when the n 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.

  As described above, in the first modification, it is possible to calculate the dimming value common to 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 the present embodiment. A tunable light function using light values can be realized. Therefore, in the first modification, the information processing device 300a does not have to be equipped with the function of generating light adjustment 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 realize improvement in the quality of the seams of the projected video in the multi-screen projection mode.

<Modification 2>
The second modification will be described with reference to FIGS. 19 to 24. FIG. 19 is a diagram for describing the configuration of the second modification.

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

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

  In the master projection type video display device 100-1, input video 0 is input, trimming of the video 1 and the video 2 is designated, and the video 2 is output to the slave projection video display device 100-2. Dimming control information calculated by calculation (average brightness, histogram, maximum brightness) and the like based on the input video 0 is also output to the projection type video display device 100-2. The light adjustment control information causes the projection image to be brought closer to the light adjustment state of the projection type image display device 100-2 to the light adjustment state of the projection type image display device 100-1 (in order to make the light adjustment value common). The dimming control information is capable of controlling the variable modulation function of the projection type image display apparatus 100-2 in units of one frame. At this time, since the projection type video display device 100-2 performs light control according to the light control control information, the light control value is common to the projection type video display device 100-1 and the projection type video display device 100-2. Be Therefore, the quality of the joint of the projection image of these devices in the multi-screen projection mode can be improved.

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

  As shown in FIG. 20, the projection type image display apparatus 100-1 of the master in the modification 2 has a variable modulation light function (a lamp dimming function, a variable iris function), and a display mode using the variable modulation light function. A plurality of display modes can be selected from the menu screen among the plurality of display modes.

  Then, in the display mode using the variable modulation light function, trimming is performed from the input image 0 while changing the light control amount according to the calculation for the input image 0 input to the projection type image display device 100-1. There is a first display mode (multi-screen projection mode) for displaying the image 1.

  Furthermore, in the first display mode, the projection-type image display device 100 is calculated in units of one frame of the projection image, which is calculated according to the calculation for the input image 0 with respect to the projection-type image display device 100-2 of the slave. The light adjustment control information capable of controlling the variable modulation light function of −2 and the image 2 trimmed from the input image 0 which is different from the image 1 are output.

  Also, in the display mode using the variable modulation light function, the light control amount is changed according to the calculation for the input video 0 input to the projection type video display device 100-1 or the video X obtained by scaling this. There is a second display mode (a single display mode) for displaying the video X obtained by scaling the input video 0.

  As with the master projection type video display device 100-1 in the second modification, the transmission processing of the video 2 and the light adjustment control information is performed on the slave projection type video display device 100-2 at the video signal input unit / This can be realized, for example, by transmitting data of a data format as shown in FIG. 21 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 the data format.

  As shown in FIG. 21, in the data format, one frame of data includes a frame header or an area of user data in frame units, and an area of a payload. The area of the payload includes video information, and the area of the frame header or user data in frame units includes dimming control information. By performing transmission in such a data format, it is possible to realize light adjustment control in units of frames in the transmission-type projection type video display device. The data format may be applied to the case where both the video data and the dimming control information are transmitted in any of the basic example of the present embodiment and other plural modified examples.

<< Projection-type image display device of slave in Modification 2>
The projection type video display apparatus of the slave in the modification 2 is demonstrated using FIG. FIG. 22 is a diagram for explaining a projection type image display apparatus of a slave in the second modification.

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

<< Master-Slave Projection Display Device in Modification 2>
The master-slave projection type video display device in the second modification has functions of both the master projection-type video display device 100-1 and the slave projection-type video display device 100-2, and the functions can be switched. Projection type video display device, which has a variable modulation light function (a lamp light adjustment function and a variable iris function) and is provided with a plurality of display modes using the variable modulation light function, and one display mode among a plurality of display modes Can be selected from the menu screen.

  Then, in the display mode using the variable modulation light function, the video 1 trimmed from the input video 0 while changing the light control amount according to the calculation for the input video 0 input to the projection type video display device There is a first display mode (multi-screen projection mode) to be displayed.

  Furthermore, in the display mode using the variable modulation light function, the light control amount is input according to the light adjustment control information capable of controlling the variable modulation light function in units of one frame of the projection image input to the projection type video display device. There is a third display mode (multi-screen projection mode) in which the input video 2 input to the projection type video display device is displayed while being changed.

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

<< Menu Screen in Modified Example 2 >>
The menu screen in the second modification will be described with reference to FIG. FIG. 23 is a diagram for explaining a menu screen in the second modification. FIG. 23 shows an example of a master-slave projection type image display apparatus.

  As shown in FIG. 23, in the input video interlocking modifiable light function mode menu as a menu screen in the modification 2, a multi-screen projection mode (master mode) as a first display mode and a third display mode are provided. The multi-screen projection mode (slave mode) of and the single display mode as the second display mode. Furthermore, the input video link interlockable modulation light function mode menu also includes a mode for turning off the input video interlocking modulation light function.

  Therefore, in the master / slave projection type image display device of the modification 2, the master mode which is the 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 And multiple types of multi-screen projection modes.

<< n Unit Connection Example in Modification 2 >>
An example of n connection in the second modification will be described with reference to FIG. FIG. 24 is a diagram for explaining an n-unit connection example in the second modification.

  In the example in which n projection type video display devices 100-1, 100-2, ..., 100-n and the information processing apparatus 300a are connected as shown in FIG. 24, the first projection type video display The device 100-1 is a master, and the other projection type image display devices 100-2 to 100-n are slaves.

  The information processing device 300 a 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 the video 1, 2 to n, and the video 2 to n are designated as slave projection video display devices 100-2 to 100-n. The light adjustment control information calculated by calculation based on the input video 0 is also output to the projection display apparatuses 100-2 to 100-n. Then, the master projection type video display device 100-1 and the slave projection type video display devices 100-2 to 100-n display the video images 1 and 2 to n.

  In this manner, when the master projection type video display device 100-1 and the slave projection type video display devices 100-2 to 100-n are multi-screen projected, the respective projection type video display devices 100-1 and 100 are used. 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 second modification, it is possible to calculate the dimming value common to 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 the present embodiment. A tunable light function using light values can be realized. Therefore, in the second modification, the information processing apparatus 300a does not have to be equipped with the function of generating light adjustment control information, and may be a simple video output apparatus. Furthermore, since the information processing device 300a only needs to be connected to the projection video display device as the master, the above-described effect can be obtained even when the video output unit of the information processing device 300a has only one system. That is, in the second modification, even when the information processing device 300a is a simple video output device and only one video output is provided, the quality of the seams of the projected video in the multi-screen projection mode can be improved.

  In addition, in the second modification, since trimming of the video of each projection type video display device is performed by the master projection type video display device, the trimming processing is not necessary in the slave projection type video display device.

<Modification 3>
The third modification will be described with reference to FIGS. FIG. 25 is a diagram for explaining the configuration of the third modification.

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

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

  The master's projection type video display device 100-1 inputs the input video 0, specifies trimming of the video 1, and outputs the input video 0 to the slave's projection type video display device 100-2 Dimming control information calculated by calculation (average brightness, histogram, maximum brightness) based on 0, etc. is also output to the projection type video display apparatus 100-2. The light adjustment control information causes the projection image display device to be displayed in units of one frame of the projection image in order to make the light adjustment state of the projection image display device 100-2 approach the light adjustment state of the projection image display device 100-1. It is light adjustment control information capable of controlling the variable modulation light function of 100-2. At this time, since the projection type video display device 100-2 performs light control according to the light control control information, the light control value is common to the projection type video display device 100-1 and the projection type video display device 100-2. Be Therefore, the quality of the joint of the projection image of these devices in the multi-screen projection mode can be improved. Also, the projection type video display device 100-2 performs trimming of the input video 0 output from the projection type video display device 100-1 to the video 2.

<< Projected Projection Display Device of Master in Modification 3 >>
The master's projection type video display device in the modification 3 will be described with reference to FIG. FIG. 26 is a diagram for describing a master projection type video display device in the third modification.

  As shown in FIG. 26, the projection type image display apparatus 100-1 of the master in the modification 3 has a variable modulation light function (a lamp dimming function, a variable iris function), and a display mode using the variable modulation light function. A plurality of display modes can be selected from the menu screen among the plurality of display modes.

  Then, in the display mode using the variable modulation light function, trimming is performed from the input image 0 while changing the light control amount according to the calculation for the input image 0 input to the projection type image display device 100-1. There is a first display mode (multi-screen projection mode) for displaying the image 1.

  Furthermore, in the first display mode, the projection-type image display device 100 is calculated in units of one frame of the projection image, which is calculated according to the calculation for the input image 0 with respect to the projection-type image display device 100-2 of the slave. It outputs dimming control information capable of controlling the variable modulation light function possessed by -2 and an input video 0.

  Also, in the display mode using the variable modulation light function, the light control amount is changed according to the calculation for the input video 0 input to the projection type video display device 100-1 or the video X obtained by scaling this. There is a second display mode (a single display mode) for displaying the video X obtained by scaling the input video 0.

<< Projection-type image display device of slave in Modification 3 >>
The projection type video display apparatus of the slave in the modification 3 is demonstrated using FIG. FIG. 27 is a diagram for explaining a projection type image display apparatus of a slave in the third modification.

  As shown in FIG. 27, the projection type image display apparatus 100-2 of the slave in the modification 3 has a variable modulation light function (a lamp light adjustment function, a variable iris function), and a display mode using the variable modulation light function. A plurality of display modes can be selected from the menu screen among the plurality of display modes.

  Then, in the display mode using the variable modulation light function, it is based on the light adjustment control information capable of controlling the variable modulation light function in units of one frame of the projection video, which is input to the projection type image display device 100-2 of the slave. There is a display mode (multi-screen projection mode) for displaying the video 2 generated by performing trimming on the input video 0 input to the projection type video display device 100-2 of the slave while changing the light control amount.

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

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

  Furthermore, in the display mode using the variable modulation light function, the light control amount is input based on the light adjustment control information capable of controlling the variable modulation light function in units of one frame of the projection image input to the projection type video display device. There is a third display mode (multi-screen projection mode = slave mode) for displaying the video 2 obtained by trimming the input video 0 input to the projection type video display device while changing.

<< Menu Screen in Modified Example 3 >>
The menu screen in the modification 3 will be described with reference to FIG. FIG. 28 is a diagram for explaining a menu screen in the third modification. FIG. 28 shows an example of a master-slave projection type image display apparatus.

  As shown in FIG. 28, in the input video interlocking modifiable light function mode menu as a menu screen in the third modification, a multi-screen projection mode (master mode) as a first display mode and a third display mode are provided. The multi-screen projection mode (slave mode) of and the single display mode as the second display mode. Furthermore, the input video link interlockable modulation light function mode menu also includes a mode for turning off the input video interlocking modulation light function.

<< Connection Example 1 of n in the third modification >>
An n-unit connection example 1 in the third modification will be described with reference to FIG. FIG. 29 is a diagram for explaining an n-unit connection example 1 in the third modification.

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

  The information processing device 300 a 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 the video 1, and further outputs the input video 0 to the slave projection type video display devices 100-2 to 100-n. The light adjustment control information calculated by calculation based on the input video 0 and the like is also output to the projection type image display devices 100-2 to 100-n. Then, the master projection type video display device 100-1 and the slave projection type video display devices 100-2 to 100-n display the video images 1 and 2 to n.

  In this manner, when the master projection type video display device 100-1 and the slave projection type video display devices 100-2 to 100-n are multi-screen projected, the respective projection type video display devices 100-1 and 100 are used. It is possible to improve the quality of the joints of the images 1, 2, ..., n displayed by -2, ..., 100-n.

<< n Connection Example 2 (Daisy Chain) in Modification 3 >>
An n-unit connection example 2 (daisy chain) in the third modification will be described with reference to FIG. FIG. 30 is a diagram for explaining an n-unit connection example 2 (daisy chain) in the third modification.

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

  The information processing device 300 a 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 the video 1, and further outputs the input video 0 to the slave projection type video display device 100-2 and The light adjustment control information calculated by the calculation based on it etc. is also output to the projection type video display apparatus 100-2. Subsequently, the projection type video display device 100-2 of the slave outputs the input video 0 and the light adjustment control information to the projection type video display device 100-3 of the slave,..., The projection type video display device 100 of the slave (N-1) outputs the input image 0 and the light adjustment control information to the projection type image display device 100-n of the slave. Then, the master projection type video display device 100-1 and the slave projection type video display devices 100-2 to 100-n display the video images 1 and 2 to n.

  In this manner, when the master projection type video display device 100-1 and the slave projection type video display devices 100-2 to 100-n are multi-screen projected, the respective projection type video display devices 100-1 and 100 are used. 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 third modification, it is possible to calculate the dimming value common to 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 the present embodiment. A tunable light function using light values can be realized. Therefore, in the third modification, the information processing apparatus 300a does not have to be equipped with the function of generating light adjustment control information, and may be a simple video output apparatus. Furthermore, since the information processing device 300a only needs to be connected to the projection video display device as the master, the above-described effect can be obtained even when the video output unit of the information processing device 300a has only one system. That is, in the third modification, even in the case where the information processing apparatus 300a is a simple video output apparatus and only one video output is provided, the quality of joints of projection video in the multi-screen projection mode can be improved.

  In the third modification, each projection type video display device outputs the input video 0 as it is, and the projection type video display device at the subsequent stage performs trimming of the video, respectively. The trimming process for the type image display device is not necessary. The above effect can also be obtained by daisy chain connection.

<Modification 4>
A fourth modification will be described using FIGS. 31 to 36. FIG. 31 is a diagram for illustrating the configuration of the fourth modification.

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

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

  In the master projection type video display device 100-1, the input video 0 is input, trimming of the video 1 and the video 2 is designated, and further, the input video 0 is output to the slave projection video display device 100-2. The trimming range designation information 2 which is information for designating the trimming range of the video 2 and the light adjustment control information calculated by the calculation (average brightness, histogram, maximum brightness) based on the input video 0, etc. Output to 2. The light adjustment control information causes the projection image display device to be displayed in units of one frame of the projection image in order to make the light adjustment state of the projection image display device 100-2 approach the light adjustment state of the projection image display device 100-1. It is light adjustment control information capable of controlling the variable modulation light function of 100-2. At this time, since the projection type video display device 100-2 performs light control according to the light control control information, the light control value is common to the projection type video display device 100-1 and the projection type video display device 100-2. Be Therefore, the quality of the joint of the projection image of these devices in the multi-screen projection mode can be improved.

<< Projected Projection Display Device of Master in Modification 4 >>
The master's projection type image display device in the modification 4 will be described with reference to FIG. FIG. 32 is a diagram for describing a master projection type video display device in the fourth modification.

  As shown in FIG. 32, the projection type image display apparatus 100-1 of the master in the fourth modification has a variable modulation light function (a lamp dimming function, a variable iris function), and a display mode using the variable modulation light function. A plurality of display modes can be selected from the menu screen among the plurality of display modes.

  Then, in the display mode using the variable modulation light function, trimming is performed from the input image 0 while changing the light control amount according to the calculation for the input image 0 input to the projection type image display device 100-1. There is a first display mode (multi-screen projection mode) for displaying the image 1.

  Furthermore, in the first display mode, the projection-type image display device 100 is calculated in units of one frame of the projection image, which is calculated according to the calculation for the input image 0 with respect to the projection-type image display device 100-2 of the slave. It outputs the dimming control information capable of controlling the variable modulation light function of −2, the input video 0, and the trimming range designation information for trimming the input video 0. At this time, in the master projection type video display device 100-1, the video 1 displayed on the master projection type video display device 100-1 and the projection type video of the slave according to the operation input inputted 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, an image displayed by the projection type image display device 100-2 of the slave Output trimming range designation information, which is information on the trimming range for 2.

  Also, in the display mode using the variable modulation light function, the light control amount is changed according to the calculation for the input video 0 input to the projection type video display device 100-1 or the video X obtained by scaling this. There is a second display mode (a single display mode) for displaying the video X obtained by scaling the input video 0.

<< Projection-type image display device of slave in Modification 4 >>
The projection type video display apparatus of the slave in the modification 4 is demonstrated using FIG. FIG. 33 is a diagram for describing a slave projection type video display device in the fourth modification.

  As shown in FIG. 33, the projection type image display apparatus 100-2 of the slave in the fourth modification has a variable modulation light function (a lamp dimming function, a variable iris function), and a display mode using the variable modulation light function. A plurality of display modes can be selected from the menu screen among the plurality of display modes.

  Then, in the display mode using the variable modulation light function, it is based on the light adjustment control information capable of controlling the variable modulation light function in units of one frame of the projection video, which is input to the projection type image display device 100-2 of the slave. Input video 0 input to the slave's projection type video display device 100-2 is trimmed using the trimming range designation information input to the projection type video display device 100-2 while changing the light control amount There is a display mode (multi-screen projection mode) for displaying.

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

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

  Furthermore, in the display mode using the variable modulation light function, the light control amount is input based on the light adjustment control information capable of controlling the variable modulation light function in units of one frame of the projection image input to the projection type video display device. A third display mode (multi-screen projection mode = the display mode 2 in which the input video 0 input to the projection type video display device is changed while being trimmed using the trimming range specification information input to the projection type video display device There is slave mode).

<< Menu Screen in Modified Example 4 >>
A menu screen in the modification 4 will be described with reference to FIG. FIG. 34 is a diagram for explaining a menu screen in the fourth modification. FIG. 34 shows an example of a master-slave projection type image display apparatus.

  As shown in FIG. 34, in the input video interlocking modifiable light function mode menu as a menu screen in the fourth modification, a multi-screen projection mode (master mode) as a first display mode and a third display mode The multi-screen projection mode (slave mode) of and the single display mode as the second display mode. Furthermore, the input video link interlockable modulation light function mode menu also includes a mode for turning off the input video interlocking modulation light function.

<< Connection Example 1 of n Unit in Modification 4 >>
An n-unit connection example 1 in the modification 4 will be described with reference to FIG. FIG. 35 is a diagram for explaining an n-unit connection example 1 in the fourth modification.

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

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

  In this manner, when the master projection type video display device 100-1 and the slave projection type video display devices 100-2 to 100-n are multi-screen projected, the respective projection type video display devices 100-1 and 100 are used. It is possible to improve the quality of the joints of the images 1, 2, ..., n displayed by -2, ..., 100-n.

<< n Connection Example 2 (Daisy Chain) in Modification 4 >>
An n-unit connection example 2 (daisy chain) in the modification 4 will be described with reference to FIG. FIG. 36 is a diagram for describing an n-unit connection example 2 (daisy chain) in the fourth modification.

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

  The information processing device 300 a outputs the input video 0 to the master projection type video display device 100-1. Taking this as an input, the master projection type video display device 100-1 designates trimming of the video 1 to n according to the operation input inputted to the operation input unit 107, and further, the input video 0 is a slave projection type. A trimming range specification list which is a list of information for specifying the trimming range of the images 2 to n other than the image 1 while outputting to the image display apparatus 100-2 and dimming control information calculated by calculation based on the input image 0 Is also output to the projection type video display device 100-2. That is, the trimming range designation list includes a series of trimming range designation information for specifying the trimming range of the images 2 to n in the plurality of projection type image display devices of the projection type image display devices 100-2 to 100-n of the slaves. It is a list including information, and when performing trimming processing in each projection type video display device, it is possible to use corresponding trimming range designation information. After that, the projection type image display apparatus 100-2 of the slave outputs the input image 0, the trimming range designation list, and the light adjustment control information to the projection type image display apparatus 100-3 of the slave, ..., the projection type of the slave The video display device 100- (n-1) outputs the input video 0, the trimming range designation list, and the light adjustment control information to the projection type video display device 100-n of the slave. Then, the master projection type video display device 100-1 and the slave projection type video display devices 100-2 to 100-n display the video images 1 and 2 to n.

  In this manner, when the master projection type video display device 100-1 and the slave projection type video display devices 100-2 to 100-n are multi-screen projected, the respective projection type video display devices 100-1 and 100 are used. 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 fourth modification, it is possible to calculate the light adjustment value common to the plurality of projection type image display devices by the processes on the side of the plurality of projection type image display devices according to the present embodiment. A tunable light function using light values can be realized. Therefore, in the fourth modification, the information processing device 300a does not have to be equipped with a function of generating light adjustment control information, and may be a simple video output device. Furthermore, since the information processing device 300a only needs to be connected to the projection video display device as the master, the above-described effect can be obtained even when the video output unit of the information processing device 300a has only one system. That is, in the fourth modification, even when the information processing apparatus 300a is a mere video output apparatus and there is only one video output, it is possible to realize an improvement in the quality of joints of projection video in the multi-screen projection mode.

  Further, in the fourth modification, each projection type video display device outputs the input video 0 as it is, and the projection type video display devices at the subsequent stage respectively perform video trimming. Therefore, in the master projection type video display device, slave projection at the latter stage The trimming process for the type image display device is not necessary. However, since the specification of the trimming range is performed by the master projection type video display device, the user does not have to set the trimming on the projection type video display devices of the respective slaves, so that the operation as the entire system is facilitated. The above effect can also be obtained by daisy chain connection.

<Further Modifications of Modification 3 and Modification 4>
In the third modification and the fourth modification described above, the dimming control calculated with the input video 0 and the master projection video display device from the projection video display device in the front stage of the system to the projection video display device in the rear stage The configuration for outputting information together has been described.

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

  That is, as long as the light adjustment value calculated from the input image 0 by the projection type video display device in the second stage of the system is the same as that of the projection type video display device in the second stage of the system, You can get the effect of

  In order to realize this, in the third and fourth modifications described above, the projection type video display device in the front stage of the system does not output the light adjustment control information, and the projection type video display device in the second stage of the system Instead of the light control process according to the light control information, the light control process using the light control value calculated based on the entire input video 0 (resulting in the same light control value as the projection type video display of the previous stage) is performed It is good.

<Modification 5>
A fifth modification will be described. Modification 5 is an example in which the image quality control interlocking function is added to <Basic Example>, <Modification 1>, <Modification 2>, <Modification 3>, and <Modification 4> described above.

  The image quality control interlocking function is performed by the image adjustment unit 160 shown in FIG. 1 of the master projection type video display device, and is a function of overall screen image quality control that controls the entire image. This function includes gamma adjustment, brightness adjustment, and contrast adjustment for the entire screen. The gamma adjustment is a process of changing a gamma curve indicating tone characteristics of an image. The brightness 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 simultaneously generates adjustment control information of the entire screen image quality control at the time of generation of light adjustment control information and outputs it as image quality adjustment specification information to other projection type video display devices. The other projection type video display devices control the whole screen image quality based on the image quality adjustment designation information generated by the master projection type video display device instead of or in addition to the image quality control in each projection type video display device I do.

<Modification 6>
A sixth modification will be described. Modification 6 is an example in which the local image quality adjustment prohibition function is added to <Basic Example>, <Modification 1>, <Modification 2>, <Modification 3>, and <Modification 4> described above.

  The local image quality adjustment function is a local image quality adjustment function that adjusts the image quality for each locality of the image performed by the image adjustment unit 160 shown in FIG. 1 of each projection type video display device, and the local image quality adjustment prohibition function is the local It is a function to prohibit 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 weight of each component.

The local image quality adjustment prohibition function is to forcibly turn off, for example, the local image quality adjustment function in the display mode by multi-screen projection in the image adjustment unit 160 of each of the master projection type video display device and the slave projection type video display device. It is to configure. (In addition, in the single display mode, the local image quality adjustment function may be configured so that the user can switch ON / OFF from the setting menu.)
Note that the local image quality adjustment prohibition function is not essential, and even if the image quality adjustment is turned on depending on the control for each locality of the video, even a projection type video display device having a different display range of video does not substantially make seams noticeable In some cases, it may not be forcibly turned off.

<Modification 7>
A seventh modification will be described using FIGS. 37 to 40. In the seventh modification, the brightness of the plurality of projection type image display devices is added to the above-described <basic example>, <modification 1>, <modification 2>, <modification 3>, and <modification 4>. This example is an example in which a response to the case where the light sources and the like are originally nonuniform (the case where the input video interlockable modulated light function is OFF and the same video signal is input but the brightness is nonuniform) is added.

  FIG. 37 is a diagram for illustrating the configuration of the non-volatile memory in the seventh modification. As shown in FIG. 37, in the non-volatile memory 108 (or storage unit 170) shown in FIG. 1, a display element drive control program 108a for controlling the drive of the display element 102, and dimming control of the light source 105 (lamp dimming An area for storing a light source light adjustment control program 108b for performing the function) and a variable aperture light adjustment control program 108c for performing the light adjustment control (variable iris function) of the variable aperture 120 is provided. In the seventh modification, 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 control in cooperation.

  Thus, the control unit 110 performs at least two of the drive control of the display element 102, the light adjustment control of the light source 105, and the light adjustment control of the variable aperture 120 as the control capable of changing the brightness of the projection image light. To achieve.

  FIG. 38 is a diagram for describing control by control unit 110 in the seventh modification. As shown in FIG. 38, the control unit 110 is configured to reduce the brightness of projected light among a plurality of projection type video display devices when the same video signal is input when the input video interlocking modifiable light function is OFF. 1 is performed (S1), and then, a second control is performed to perform the input video linkable modulated light when the input video linkable modulated light function interlocked with a plurality of projection type video display devices is ON (S2) . In this case, the control unit 110 makes the combination of the control used to adjust the brightness different between the first control and the second control. Furthermore, the light control function used in the second control is not used in the first control.

  FIG. 39 is a diagram for describing a specific example of a combination of the first control and the second control in the seventh modification described with reference to FIG. As shown in FIG. 39, for example, in the first example, the first control is light adjustment control of the light source 105, and the second control is light adjustment control of the variable aperture 120. The merit of this example 1 is that it is possible to reduce the variation between the projection type video display devices in the middle luminance and to widen the range of the display element 102. Example 2 is the reverse of Example 1. The first control is the light adjustment control of the variable stop 120, and the second control is the light adjustment control of the light source 105, which has the same merit as the example 1.

  In Example 3, the first control is drive control of the display element 102 (entire screen), and the second control is light adjustment control of the variable aperture 120. The merit of this example 3 is that the variation between the projection type image display devices in the middle luminance can be reduced and the light adjustment control of the light source 105 can be made unnecessary. Example 4 is the case where the first control is drive control of the display element 102 (entire screen) and the second control is light adjustment control of the light source 105, and the light adjustment control of the variable aperture 120 is not required. it can.

  In the fifth example, the first control is a combination of the drive control (the entire screen or the overlap region) of the display element 102 and the light adjustment control of the light source 105, and the second control is the light adjustment control of the variable aperture 120. The merit of this example 5 can reduce the variation between the projection type video display devices at the middle luminance. The sixth example is the case where the first control is a combination of the drive control (the entire screen or the overlap region) of the display element 102 and the light adjustment control of the variable aperture 120, and the second control is the light adjustment control of the light source 105. There are the same merits as Example 5.

  In the seventh example, the first control is drive control (the entire screen or the overlap region) of the display element 102, and the second control is a combination of light adjustment control of the variable stop 120 and light adjustment control of the light source 105. In the seventh example, although the second control may be performed by both of the light adjustment control of the variable aperture 120 and the light adjustment control of the light source 105, the same second process is performed among variable aperture light adjustment of a plurality of projection type image display devices. It is necessary to use the first dimming control information and use the same second dimming control information between light source dimmings of a plurality of projection type video display devices.

  FIG. 40 is a diagram for explaining the light control characteristic of the variable stop 120 in the seventh modification. As shown in FIG. 40, the light control characteristic of the variable stop 120 is not linear with respect to the light control control signal (the drive voltage or the number of steps of the variable stop 120) of the illumination intensity to the display element 102. This characteristic differs depending on the design of the optical system, the structure of the moving mechanism of the light blocking plate of the variable stop 120, and the motor characteristics.

  If a plurality of projection type image display devices having the same light control characteristic and the same model are prepared and the same light adjustment control signal is given, it is possible to easily obtain close illuminance in the plurality of projection type image display devices. On the other hand, it is difficult to calculate the light adjustment control signal for obtaining the desired illumination intensity by calculation. It may be possible if an illuminance sensor is provided, but it becomes expensive.

  Although illustration is omitted, similarly, the dimming characteristic of the light source 105 also does not have a linear characteristic of illuminance with respect to a control signal such as a voltage. This differs depending on the type of the light source 105 and the configuration of the power supply circuit, and thus the same as above.

  In the seventh modification, the first control is a control for reducing the variation in the irradiation light among the projection type image display devices, and thus is a technique for positively making the control signal of the light control function different. On the other hand, the second control is control to make the light adjustment function between the projection type video display devices have the same characteristic as much as possible. Here, when the light adjustment control used for the second control is used for the first control, a plurality of light adjustment control ranges (for example, the range of the light adjustment control signal on the horizontal axis in FIG. 40) used for the second control are plural. Between the projection type video display devices. As described in FIG. 40, since the light control characteristics of the variable stop 120 and the light control characteristics of the light source 105 are not linear, the light control control range dispersed among a plurality of projection type image display devices by the first control. In the second control, the influence of V.sub.2 is generated as the illumination variation.

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

  In the embodiments of the present invention described above, the light adjustment control by light adjustment value calculation in one frame unit has been described, but in the case of a frame unit, the light adjustment value change control does not necessarily need to be performed every one frame. The light control value change control may be performed every several frames.

  As explained above, according to the projection type video display apparatus 100 in one embodiment of the present invention, the quality of the joint of multi-screen projection can be improved more suitably.

  Moreover, according to the projection type video display apparatus 100 in this Embodiment, the high dynamic range of the video by multi-screen projection can be implement | achieved more suitably.

  As a result, according to the projection type video display apparatus 100 in the present embodiment, it is possible to achieve both the difficulty of noting the seam of video and the high dynamic range of video more suitably at the time of multi-screen projection.

  As mentioned above, although the invention made by the present inventor was concretely explained based on an embodiment, the present invention is not limited to the above-mentioned embodiment, and can be variously changed in the range which does not deviate from the gist. Needless to say.

  Further, the above 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 one having all the described configurations. Moreover, it is possible to perform addition, deletion, and substitution of another composition about a part of composition (a basic example, each modification) of the above-mentioned embodiment.

  DESCRIPTION OF SYMBOLS 100 (100-1-100-n) ... Projection type video display apparatus, 101 ... Projection optical system, 102 ... Display element, 103 ... Display element drive part, 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 Parts / output parts, 140: speakers, 160: image adjustment parts, 170: storage parts, 190: interfaces.

Claims (4)

A projection type video display device,
A video input unit for inputting an input video;
Light source,
A display element which receives, transmits or reflects light generated by the light source;
A projection optical system that projects light from the display element as a display image;
A modulated light function that changes the amount of light incident on the display element;
Equipped with
A plurality of display modes relating to the variable modulation light function are provided, and one of the plurality of display modes can be selected from the menu screen.
The display mode of the display image related to the variable modulation light function includes:
A first display for displaying a first input video input in the video input unit while changing a dimming amount according to dimming control information capable of controlling the variable light function input from an external device Mode and
A second display mode for displaying the second input video while changing the light control amount according to the second input video input in the video input unit;
There is
In the first display mode,
The first input video input at the video input unit constitutes a partial range of video that is larger than the first input video, and
The dimming control information is generated by an external device based on an operation using a video having a larger range than the first input video, and changes according to the content of the video having a larger range than the first input video. Control information to be
The modulated light function is capable of changing the light control amount according to the light control control information input from the external device,
The variable modulation light function can change the light control amount according to the input image,
Furthermore, it has a second modulated light function capable of changing the amount of light control by a light control means different from the light control means used for the variable light function .
The modulated light function includes light control to change the amount of light incident on the display element by changing the light emission amount of the light source, or variable provision of the projection type video display device in an optical path from the light source to the display element It includes light control to change the amount of light incident on the display element by changing the amount of light blocking by a diaphragm.
The second modulated light function includes dimming by changing the brightness of a projected image of the entire screen or a part of the screen by the display element.
Projection type video display device. The projection type image display apparatus according to claim 1, wherein
The second modifiable light function is a case where the modifiable light function is turned off when the related video is simultaneously displayed by both of the projection type video display device and another projection type video display device. The modulated light function used to make the boundary between the two projected images less noticeable.
The dimming means used for the variable modulation light function is not used for the second variable modulation light function,
Projection type video display device. It is a projection type video display apparatus of Claim 1 or 2, Comprising:
The display mode of the display image related to the variable modulation light function further includes a third display mode in which the variable modulation light function is turned off.
Projection type video display device. It is a projection type video display apparatus of any one of Claims 1-3, Comprising:
Second image quality adjustment processing that locally differs in first image quality adjustment processing that uniformly affects the entire input video input in the video input unit, and image quality adjustment performed on the input video input in the video input unit Image quality adjustment function that can
In the first display mode, there is a state where execution of the first image quality adjustment processing is permitted and execution of the second image quality adjustment processing is prohibited.
Projection type video display device.

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