JP6672505B2 - Projection type video display - Google Patents

Description

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

  2. Description of the Related Art As a projection-type image display device, a device including a light source, a display element for receiving light generated by the light source, and a tunable light function for changing the amount of light incident on the display element is known. For example, Patent Literature 1 discloses an illumination device used for a projection display device, which includes a light source, a uniform illumination unit that equalizes the illuminance distribution of light incident from the light source, and an adjustment device that adjusts the amount of light emitted from the light source. An apparatus comprising light means is disclosed. Patent Literature 1 describes that the amount of light emitted from a uniform illumination unit can be adjusted by controlling a dimming unit based on external information.

International Publication No. 03/032080

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

  In such a usage form in which a plurality of projection-type image display devices are projected on a multi-screen, since the input images of the respective projection-type image display devices are different, the illuminance at the joint of the multi-screen projection is adjusted to be close. It is necessary to improve the quality of the joint.

  In the technology of Patent Document 1 described above, the amount of light emitted from the uniform illuminating unit can be adjusted by controlling the dimming unit. Is not taken into account.

  An object of the present invention is to provide a projection-type image display device that improves the quality of a joint of projected images during multi-screen projection.

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

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

  The effects obtained by typical aspects of the invention 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 a joint of projected images during multi-screen projection.

It is a block diagram showing an example of an internal configuration of a projection type video display device in one embodiment of the present invention. FIG. 9 is a diagram for describing an example of multi-screen projection by “projection without overlapping”. FIG. 9 is a diagram for describing an example of multi-screen projection by “projection with overlap”. FIG. 11 is a diagram for describing a configuration example of a conventional multi-screen projection system. FIG. 7 is a diagram for describing an example of multi-screen projection of “projection without overlapping + modulation light function linked to input image”. It is a figure for explaining a subject of [projection without superposition + input picture interlocking modulatable light function of the prior art]. FIG. 8 is a diagram for describing an example of multi-screen projection of “projection with overlap + no input image-linked modulatable light function”. It is a figure for explaining a subject of [projection with overlap + input video interlocking modulatable light function of the prior art]. FIG. 9 is a diagram for explaining an operation concept of “projection without overlapping + modulation light function linked to input image of the present embodiment”. It is a figure for explaining the operation concept of [projection with overlap + input video interlocking modulatable light function of the present embodiment]. FIG. 2 is a diagram for describing a configuration of a basic example in one embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining a projection type video display device in a basic example according to an embodiment of the present invention. FIG. 4 is a diagram for explaining a menu screen in a basic example according to the embodiment of the present invention. FIG. 5 is a diagram for describing an example of n-unit connection in a basic example in one embodiment of the present invention. FIG. 9 is a diagram for describing a configuration of a first modification in one embodiment of the present invention. FIG. 9 is a diagram for describing a projection-type image display device according to a first modification in the embodiment of the present invention. FIG. 14 is a diagram for describing a menu screen in a first modification in the embodiment of the present invention. FIG. 14 is a diagram for describing an example of connecting n units in Modification Example 1 in one embodiment of the present invention. FIG. 13 is a diagram for describing a configuration of a modification 2 in one embodiment of the present invention. FIG. 13 is a diagram illustrating a master projection-type image display device according to a modification 2 in one embodiment of the present invention. FIG. 4 is a diagram for describing an example of a data format in one embodiment of the present invention. FIG. 15 is a diagram illustrating a projection type video display device of a slave according to a modification 2 in one embodiment of the present invention. FIG. 14 is a diagram for describing a menu screen in a second modification in the embodiment of the present invention. FIG. 13 is a diagram illustrating an example of connecting n units in Modification Example 2 in one embodiment of the present invention. FIG. 14 is a diagram for describing a configuration of Modification 3 in one embodiment of the present invention. FIG. 13 is a diagram for describing a master projection-type image display device according to a modification 3 in one embodiment of the present invention. FIG. 15 is a diagram illustrating a projection type video display device of a slave according to a modification 3 in one embodiment of the present invention. FIG. 14 is a diagram for explaining a menu screen in a modification 3 in one embodiment of the present invention. FIG. 14 is a diagram for describing an n-unit connection example 1 in a modified example 3 in one embodiment of the present invention. FIG. 14 is a diagram for describing an n-unit connection example 2 (daisy chain) in a modification 3 in one embodiment of the present invention. FIG. 14 is a diagram for describing a configuration of Modification Example 4 in one embodiment of the present invention. FIG. 15 is a diagram for describing a master projection-type image display device according to a modification 4 in one embodiment of the present invention. FIG. 15 is a diagram illustrating a projection type video display device of a slave according to a modification 4 in one embodiment of the present invention. FIG. 14 is a diagram for explaining a menu screen in a modified example 4 in one embodiment of the present invention. FIG. 14 is a diagram for describing an n-unit connection example 1 in a modification 4 in one embodiment of the present invention. FIG. 16 is a diagram for describing an n-unit connection example 2 (daisy chain) in a modification 4 in one embodiment of the present invention. FIG. 21 is a diagram for describing a configuration of a nonvolatile memory according to a modification 7 in one embodiment of the present invention. FIG. 19 is a diagram for describing control by a control unit in a modification 7 in one embodiment of the present invention. FIG. 21 is a diagram for describing an example of a combination of the first control and the second control in Modification 7 in one embodiment of the present invention. FIG. 15 is a diagram for explaining the dimming characteristics of the variable aperture stop according to a modification 7 in one embodiment of the present invention.

  In the following embodiments, when necessary for the sake of convenience, the description will be made by dividing into a plurality of sections or embodiments, but they are not unrelated to each other, unless otherwise specified, and one is the other. Some or all modifications, details, supplementary explanations, and the like. Further, in the following embodiments, when referring to the number of elements (including the number, numerical value, amount, range, etc.), a case where it is particularly specified and a case where it is clearly limited to a specific number in principle, etc. Except, the number is not limited to the specific number, and may be more than or less than the specific number.

  Furthermore, in the following embodiments, the constituent elements (including the element steps and the like) are not necessarily essential, unless otherwise specified or in principle considered to be clearly essential. Similarly, in the following embodiments, when referring to the shape, positional relationship, and the like of the components, the shape is substantially the same And the like. This is the same for the above numerical values and ranges.

  Hereinafter, an embodiment will be described in detail with reference to the drawings. In each of the drawings for describing one embodiment, the same members are denoted by the same reference numerals in principle, and the repeated description thereof will be omitted.

[One Embodiment]
A projection type video display device according to an embodiment will be described with reference to FIGS.

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

  The projection display apparatus 100 according to the present embodiment includes a projection optical system 101, a display element 102, a display element driving unit 103, an illumination optical system 104, a light source 105, a power supply 106, an operation input unit 107, a nonvolatile memory 108, a memory 109 and a control unit 110. Further, projection-type image display device 100 according to the present embodiment includes cooling unit 115, video signal input / output unit 131, communication unit 132, audio signal input / output unit 133, speaker 140, image adjustment unit 160, and The 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 AC current input from the outside into a DC current and supplies power to the light source 105. Further, the power supply 106 supplies a necessary DC current to each of the other units. The illumination optical system 104 condenses the light generated by the light source 105 and irradiates the light to the display element 102 in a more uniform manner. The cooling unit 115 cools each part to be in a high temperature state, such as the light source 105, the power supply 106, or the display element 102, by an air cooling method or a liquid cooling method as needed.

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

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

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

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

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

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

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

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

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

  The communication unit 132A inputs and outputs various control signals to and from the external device 400A also 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 the interface 190B and the video signal input / output unit 131B, the audio signal input / output unit 133B, and the communication unit 132B that also connect the projection type video display device 100 and the external device 400B, and also configure a part of the interface 190B. Is also the same as the above-described interface 190A and the configuration and processing of the video signal input / output unit 131A, audio signal input / output unit 133A, and communication unit 132A that constitute a part of the interface 190A, and a description thereof will be omitted. I do. Although FIG. 2 shows an example in which the projection display apparatus 100 has two interfaces 190A and 190B as the interface 190, the projection type video display apparatus 100 may have only one of the interfaces 190A and 190B. 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 nonvolatile memory 108 stores various data used for the projector function. The memory 109 stores video data to be projected and control data for the apparatus. Image data used for generating a GUI image may be stored. The control unit 110 controls the operation of each connected unit.

  The image adjustment unit 160 performs image processing on the video data input by the video signal input / output unit 131. The image processing includes, for example, scaling processing for enlarging, reducing, and deforming an image, bright adjustment processing for changing luminance, contrast adjustment processing for changing a contrast curve of an image, and a gamma curve indicating a gradation characteristic of an image. There are gamma adjustment processing for changing, and Retinex processing for changing the weight of each component by decomposing an image into light components.

  The storage unit 170 records video, images, audio, 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 obtained from an external device or an external server via the communication unit 132 may be recorded. It may be recorded. Images, images, various data, and the like recorded in the storage unit 170 may be output as projected images via the display element 102 and the projection optical system 101. The sound recorded in the storage unit 170 may be output as sound from the speaker 140.

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

  As described above, various functions can be mounted on the projection display 100.

<Modulated light function linked to input video>
Next, the input video-linked modulatable light function of the projection video display device 100 shown in FIG. 1 will be described. The projection-type image display device 100 has, for example, three means for changing the luminance of the projection image. The first is a display element 102. The second is a variable stop 120, which realizes dimming by changing the amount of light blocking in the optical path of the illumination optical system 104 described above. The third is a power source 106 for the light source. The power supply 106 receives a dimming value (for example, a light blocking ratio or the number of steps of an aperture) calculated based on an image input to the image signal input / output unit 131 or a signal received from the communication unit 132 under the control of the control unit 110. The brightness of the light source 105 is changed by changing the voltage for the light source according to the dimming value (for example, the light blocking ratio or the number of steps of the aperture) calculated based on the control signal to be performed, thereby realizing the dimming.

  A function of controlling the amount of light control in conjunction with the input image, that is, a so-called “input image-linked modulatable light function” (also simply referred to as a “modulatable light function”) is required.

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

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

  In addition, a plurality of projection-type image display devices 100 are provided, and a plurality of projection-type image display devices 100 project images on the display surface, respectively, and project one continuous input image as a whole (multi-screen projection). Usage form). The multi-screen projection includes “non-overlapping projection” in which adjacent images are projected onto the display surface so that they do not overlap, and “multiple projection” in which adjacent images are projected onto the display surface so as to overlap. Note that the concept of “projection without overlapping” includes projection in which a plurality of images are adjacent to each other so as not to overlap, but does not require that adjacent images do not strictly overlap at all. It does not mean to completely eliminate the condition that the parts overlap slightly. That is, without performing brightness adjustment of a plurality of images in the “superimposed portion” of the “projection with overlap” described in the following description of the present embodiment, a plurality of images are projected adjacently so as not to overlap as much as possible. is there. In that sense, of the types of multi-screen projection in the following description of the present embodiment, “projection without overlapping” may be expressed as “projection without luminance adjustment of the overlapping portion”. Similarly, “projection with overlap” may be expressed as “projection with luminance adjustment of the overlapped portion”. In such a usage form, in each of the plurality of projection-type image display devices 100, it is necessary to pay attention so that a joint of images at the time of multi-screen projection does not become unnatural.

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

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

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

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

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

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

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

  FIG. 3 shows a case where the input image as the original image has an average luminance value of 50 in the overlapping projection of the two projection image display devices. The image 1 is for 1200 pixels (positions of 0 to 1200 pixels), and the image 2 is for 1200 pixels (positions 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 luminance value is 0 when the screen position is 0 pixel, and the screen position is 2000 pixel. If the luminance value becomes 100 at the position of and the image can be displayed with the characteristic of increasing linearly, the joint between the image 1 and the image 2 does not become unnatural.

  Next, a description will be given using an example of trying to display a target gradation image described with reference to FIG. 2 using a conventional projection image display device.

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

  However, when the tunable light function (lamp dimming function, variable iris function) according to the input image of each of the projection type image display devices 90-1 and 90-2 is performed, each of the projection type image display devices 90-1 and 90-2. , 90-2, the black luminance and the white luminance change, and the connection of the luminance of the joint becomes unnatural. Therefore, conventionally, it is necessary to turn off the input image-linked variable light function.

  Hereinafter, an example in which the input video-linked modulatable light function is turned on and off in the multi-screen projection in the conventional projection type video display device will be described in comparison.

<<< No overlap projection + no modulating light function linked to input image >>>
First, an example in which a target gradation display is attempted in the state of “projection without overlapping + modulation light function linked with input image” will be described with reference to FIG.

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

  In this case, in the relationship between the screen position of image 1 (position of 0 to 1000 pixels) and the luminance value, the luminance value is 0 when the screen position is 0 pixel, and the luminance value is 1000 when the screen position is 1000 pixels. 50, which is a characteristic that increases linearly.

  In the relationship between the screen position of image 2 (the position of 1000 to 2000 pixels) and the luminance value, the luminance value is 50 when the screen position is 1000 pixels, and 100 when the screen position is 2000 pixels. , A characteristic that increases linearly.

  As described above, when the tunable light function is turned off or when the function is not provided, the target gradation display can be reproduced, and the joint between the video 1 and the video 2 can be made natural.

<< Problem: [Overlay-less projection + Modular light function linked to input video of conventional technology] >>
Next, a problem in a case where a target gradation display is attempted in the state of “non-overlap projection + conventional input image-linked modulatable light function” will be described with reference to FIG.

  FIG. 6 shows a non-overlapping projection of the image 1 of the projection type image display device 90-1 and the image 2 of the projection type image display device 90-2. This is a case where the function is ON.

  Here, the input video-linked modulatable light function of the related art will be described as an example of a general function of varying a dimming amount in conjunction with the average luminance of an input video signal. For the sake of simplicity, the luminance value of the input image is set in the range of 0 to 100. If the average luminance is 0, the dimming amount is 0%. If the average luminance is 100, the dimming amount is 100%. It shall be proportional to the average luminance.

  It is also assumed that the image 1 has an input average luminance value of 25 for 1000 pixels (positions of 0 to 1000 pixels). It is assumed that the video 2 has an average input luminance value of 75 for 1000 pixels (positions of 1000 to 2000 pixels). It is assumed that the input average luminance value = 50 for the entire image (position of 0 to 2000 pixels).

  In this case, since the average input luminance value input to the projection display 90-1 is 25, the dimming rate by the tunable light function of the projection display 90-1 is 25%. Therefore, in the relationship between the screen position of image 1 (position of 0 to 1000 pixels) and the output luminance value (without dimming function × 0.25), the luminance value is 0 when the screen position is 0 pixel and the screen position is At the position of 1000 pixels, the luminance value is 12.5, which is a characteristic that increases linearly.

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

  The original target luminance value (without dimming function × 0.5) indicated by the dotted line is such that the luminance value is 0 when the screen position is 0 pixel, and 50 when the screen position is 2000 pixel. , Which should increase linearly. 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 combined output luminance value when the image 1 and the image 2 are combined, the screen position is the position of 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 combined output luminance value deviates from the target luminance value, and the luminance change at the 1000-pixel screen position, which is the joint of the images, is unnatural.

<< [Projection with overlay + no modulating light function linked to input image] >>
Next, an example in which a target gradation display is attempted in the state of “projection with overlap + no input image-linked modulatable light function” will be described with reference to FIG. The example of the system configuration is the same as that of FIG.

  FIG. 7 shows a case where the dimming function interlocked with the input image is turned off in the overlapping projection of the image 1 of the projection image display device 90-1 and the image 2 of the projection image display device 90-2 (or If there is no function).

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

  In the relationship between the screen position of image 2 (the 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 luminance value increases linearly. When the screen position is 1200 to 2000 pixels, the characteristic increases linearly ( (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 superimposed portion of two images (the portion of 800 to 1200 pixels in the example of FIG. 7), the two images are naturally mixed. Meanwhile, in both images, the output luminance value is calculated by adjusting the output luminance value (luminance adjustment of the superimposed portion) so that the output luminance value gradually decreases toward the screen edge, and the target gradation is obtained. .

  As described above, when the tunable light function is turned off or the function is not provided, the target gradation display can be reproduced even by the overlapping projection, and the joint between the image 1 and the image 2 is set to a natural state. Can be.

<< Problem: [Overlay projection + Modular light function linked to input video of conventional technology] >>
Next, a problem in a case where a target gradation display is attempted in a state of “projection with overlap + modulation light function linked to input video of the related art” will be described with reference to FIG.

  FIG. 8 shows a superimposed projection of an image 1 of the projection type image display device 90-1 and an image 2 of the projection type image display device 90-2, and also has a dimming function linked to the input image of the related art. , The function is ON.

  It is assumed that the function of the input video linkable modulating light of the prior art illustrated here is the same as the function of the input video linking modulatable light of the prior art described with reference to FIG. 6, and the description thereof will not be repeated.

  Further, it is assumed that the image 1 has an input average luminance value of 30 for 1200 pixels (positions of 0 to 1200 pixels). The video 2 has an average input luminance value of 70 for 1200 pixels (at a position of 800 to 2000 pixels). It is assumed that the input average luminance value = 50 for the entire image (position of 0 to 2000 pixels).

  In this case, since the average input luminance value input to the projection display 90-1 is 30, the dimming rate by the tunable light function of the projection display 90-1 is 30%. Accordingly, in the relationship between the screen position of image 1 (position of 0 to 1200 pixels) and the luminance value (without dimming function × 0.3), the luminance value is 0 when the screen position is 0 pixel and the screen position is The luminance value is 15 at the position of 800 pixels, the luminance value is 0 at the position of 1200 pixels on the screen, and increases linearly in the range of 0 to 800 pixels. The screen position is 800 to 1200 pixels. In the range, the characteristic decreases linearly.

  Further, since the average input luminance value input to the projection display 90-2 is 70, the dimming rate by the tunable light function of the projection display 90-2 is 70%. Therefore, in the relationship between the screen position of image 2 (the position of 800 to 2000 pixels) and the luminance value (without dimming function × 0.7), the luminance value is 0 when the screen position is 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 2000 pixels, and the characteristic is that the luminance increases linearly in the range of 800 to 1200 pixels. In the range of 2000 pixels, the characteristic increases linearly (the characteristic increases more gradually than in the range of 800 to 1200 pixels).

  The original target luminance value (without dimming function × 0.5) indicated by the dotted line is such that the luminance value is 0 when the screen position is 0 pixel, and 50 when the screen position is 2000 pixel. , Which should increase linearly. 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 combined output luminance value when the image 1 and the image 2 are combined, the screen position is the position of 0 to 800 pixels. And the linearly increasing characteristic at the position of 1200 to 2000 pixels, but the characteristic that the combined output luminance value sharply increases linearly from 15 to 52.5 at the position of 800 to 1200 pixels of the overlapping portion. That is, the combined output luminance value deviates from the target luminance value, and the luminance change around the overlapped portion of 800 to 1200 pixels, which is the seam of the image, is unnatural.

  As described above, in the conventional projection-type image display device, when performing the multi-screen projection, turning on the input image-linked variable light function makes the luminance change around the joint unnatural. It was necessary to turn off the tunable light function. For this reason, in multi-screen projection, it is not easy to obtain the effect of expanding the dynamic range of an image by the input image-linked modulatable light function.

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

  In the present embodiment, a common dimming value is set using a parameter based on a video portion (for example, the entire input video) in a range larger than the divided video unit, instead of the dimming in the divided video unit, when performing multi-screen projection. However, by using the common dimming value in common for a plurality of projection-type image display devices, the dimming rate between the plurality of projection-type image display devices can be made closer, and the dimming function is operated. Also, the boundary portions (joints, boundaries) of the multi-screen projection can be made inconspicuous. Specifically, it is as follows.

<< Solution: [Projection without overlapping + input image-linked modulatable light function of the present embodiment] >>
An operation concept of [projection without overlapping + modulation light function linked to input video of the present embodiment] that solves the conventional problem will be described with reference to FIG.

  FIG. 9 shows an operation example that can solve the problem in << Problem: Non-overlapping projection + conventional input image-linked modulatable light function in the case of gradation display >> shown in FIG. 6 described above. ing.

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

  In the input image-linked modulatable light function of the present embodiment, the input average luminance value of an image larger than the respective images (eg, the entire image) is commonly used for both image 1 and image 2. As a result, the combined output luminance value approaches the target luminance value.

  In FIG. 9, it is assumed that the image 1 has an input average luminance value of 25 for 1000 pixels (positions of 0 to 1000 pixels). It is assumed that the video 2 has an average input luminance value of 75 for 1000 pixels (positions of 1000 to 2000 pixels). It is assumed that the input average luminance value = 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 combined output luminance value when combining the image 1 and the image 2 is indicated by a broken line in the input image-linked modulatable light function of the related art. As described above, since the composite output luminance value changes from 12.5 to 37.5 at the position of 1000 pixels, the composite output luminance value deviates from the target luminance value, and the screen position of 1000 pixels is connected. My eyes were unnatural.

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

<< Solution: [Projection with overlap and input image linkable modulation light function of the present embodiment] >>
Next, the operation concept of [projection with overlap + modulation light function linked to input video of the present embodiment] which solves the conventional problem for [projection with overlap] will be described with reference to FIG.

  FIG. 10 shows an operation example that can solve the problem in <<< Problem: [Projection with Overlapping + Input-Video Linkable Modulatable Light Function of Conventional Technique] in the case of gradation display >>> shown in FIG. ing.

  As in the example of FIG. 9, the input video-linked modulated light function of the present embodiment in FIG. 10 is, for example, the configuration of the “input video-linked modulated light function” described in the description of FIG. The function (variable iris function) of realizing the light shading dimming described above or the function (lamp dimming function) of realizing the voltage variable modulation light of the power source 106 for the light source is applied.

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

  In FIG. 10, it is assumed that the input average luminance value of the image 1 is 1200 pixels (positions of 0 to 1200 pixels) = 30. The video 2 has an average input luminance value of 70 for 1200 pixels (at a position of 800 to 2000 pixels). It is assumed that the input average luminance value = 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 combined output luminance value when combining the image 1 and the image 2 is indicated by a broken line in the input image-linked modulatable light function of the related art. As described above, since the combined output luminance value increases linearly and abruptly from 15 to 52.5 at the positions of 800 to 1200 pixels in the overlapping portion, the combined output luminance value deviates from the target luminance value, and However, the seam between 800-1200 pixel screen positions in the overlapped portion was unnatural.

  On the other hand, in the input video-linked modulatable light function of the present embodiment, calculation is performed based on the input average luminance values of video 1 (input average luminance value = 30) and video 2 (input average luminance value = 70). The dimming value (30% and 70% in the example of FIG. 6) is not separately applied, and the dimming value calculated based on the input average luminance value = 50 of the entire video larger than video 1 and video 2 ( 50%) is used in common for both video 1 and video 2. As a result, as indicated by the solid line, the luminance value is 0 when the screen position is 0 pixel, and the luminance value is 50 when the screen position is 2000 pixel, and the characteristic increases linearly. As a result, the combined output luminance value approaches the target luminance value (without dimming function × 0.5), and the luminance change near the 800-1200 pixel screen position of the overlapped portion that is the seam of the screen is more natural. become.

  <Basic example>, <Modification example 1>, <Modification example 2>, <Modification example 3>, <Modification example 4>, and <Modification example 5> to which the <Means for solving the problem of the multi-screen projection> described above is applied. >, <Modification 6>, and <Modification 7> will be described below in order. Note that these basic examples and modified examples can be applied to any of the above-mentioned “projection without overlapping” and “projection with overlapping”.

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

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

  Note that the connection between the projection-type image display device and the information processing device and the connection between the plurality of projection-type image display devices described with reference to FIG. I just need. In this way, in each connection, not only transmission / reception of video but also transmission / reception of control information can be performed.

  The information processing device 300a is configured to input an image to be displayed on each of the projection-type image display devices 100-1 and 100-2 based on the input image 0 that is projected on the multi-screen by both the projection-type image display devices 100-1 and 100-2. Images 1 and 2 are generated. Further, the information processing device 300a calculates the light intensity by performing an arithmetic operation using the entire input image 0 that is wider than the respective ranges of the input images 1 and 2 displayed by the projection image display devices 100-1 and 100-2. Is determined, and information (dimming control information) for specifying the dimming amount is also generated.

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

  The effect of the configuration of the basic example is that, when a multi-screen is projected, the joint between the image 1 displayed by the projection-type image display device 100-1 and the image 2 displayed by the projection-type image display device 100-2 is less noticeable. The high dynamic range of the entire multi-screen projection image of the image 1 and the image 2 can be compatible.

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

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

  Then, in the display mode using the tunable light function, the dimming amount is changed according to the dimming control information input from the information processing device 300a and capable of controlling the tunable light function in units of one frame of the projected image. There is a first display mode in which the input video 1 is displayed while the input video 1 is being displayed. That is, in the first display mode, the dimming amount is varied according to the input dimming control information. The first display mode is a display mode (multi-screen projection mode) used during the above-described multi-screen projection.

  Further, in the display mode using the tunable light function, in order to use the projection-type image display device 100-1 alone, the light intensity is adjusted according to the input image 1 input to the projection-type image display device 100-1. There is a second display mode in which the input video 1 is displayed while changing. That is, the calculation target of the dimming amount calculation in the second display mode is an input image to the projection display 100-1 as shown in FIG. The second display mode is a display mode (single display mode) when the projection display apparatus 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, in the basic example, the input video-linked modulatable light function mode menu as a menu screen includes a multi-screen projection mode as a first display mode, a single display mode as a second display mode. There is. Further, the input video-linked modulated light function mode menu also has a mode for turning off the input-video linked modulated light function. These modes may be configured so that they can be selected alternatively by moving the cursor based on the operation input input to the operation input unit 107.

  In the configuration of this basic example, an image quality control interlocking function of <Modification 5> and a local image quality adjustment prohibition function of <Modification 6> can be added as image quality adjustment functions. For example, in the first display mode, execution of a first image quality adjustment process (image quality control interlocking function of <Modification 5>) that uniformly affects the entire input image is permitted, and image quality adjustment for the input image is locally performed. A second image quality adjustment process (local image quality adjustment prohibition function of <Modification 6>) that is different from the above may be prohibited. In addition, in the second display mode or the mode in which the input image-linked variable light function is OFF, both the first image quality adjustment process and the second image quality adjustment process may be permitted.

  Further, in the configuration of this basic example, even when the input image-linked modulatable light function is turned off due to individual differences of the light source 105, the brightness of the plurality of projection image display devices 100-1 and 100-2 is not uniform. As a response to the above, the function of <Modification 7> described later can be added. For example, the projection-type image display devices 100-1 and 100-2 use the dimming means different from the dimming means used for the input image-linked modulatable light function (the second control of the <Modification 7>). Has a second modulatable light function (first control of <Modification 7>) capable of changing the parameter. This second tunable light function is used when the related image is simultaneously displayed by using the projection display 100-1 and another projection display 100-2. This is a variable light function that is used to make the boundary between the two projected images inconspicuous when turned off. The light control means used for the tunable light function is not used for the second tunable light function.

  The additional functions of <Modification 5>, <Modification 6>, and <Modification 7> are not limited to <Basic Example>, and may be modified in the following <Modification 1>, <Modification 2>, <Modification 3>. > And <Modification 4> can be similarly added.

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

  As shown in FIG. 14, in an example in which the n projection image display devices 100-1, 100-2,..., 100-n are connected to the information processing device 300 a, the information processing device 300 a , 100-n to be displayed on each of the video display devices 100-1, 100-2,..., 100-n. The information processing apparatus 300a also generates dimming control information for specifying a dimming amount common to the projection display apparatuses 100-1, 100-2,..., 100-n. Then, the information processing device 300a outputs the input images 1, 2,..., N and the dimming control information to each of the projection-type image display devices 100-1, 100-2,. . With this as an input, each of the projection-type image display devices 100-1, 100-2,..., 100-n controls the amount of light control based on light control information that specifies a common light control value in any device. , N are displayed while changing.

  In this way, when n projection-type image display devices 100-1 to 100n perform multi-screen projection, image 1 displayed by projection-type image display device 100-1 and projection-type image display device 100-2 are displayed. , A joint between the image 2 displayed by the projection-type image display device 100-2 and the image 3 displayed by the projection-type image display device 100-3,..., The projection-type image display device 100- ( It is possible to improve the quality of the joint between the image n-1 displayed by n-1) and the image n displayed by the projection display 100-n.

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

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

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

  The information processing apparatus 300a outputs an input video image 0 to be projected on multiple screens by both the projection image display apparatuses 100-1 and 100-2 to the projection image display apparatuses 100-1 and 100-2.

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

  In order to share other settings such as image quality, a communication line may be connected between the projection display 100-1 and the projection display 100-2 for communication. .

<<< Projection Display Apparatus in Modification 1 >>>
The projection display apparatus according to the first modification will be described with reference to FIG. FIG. 16 is a diagram for explaining a projection display apparatus according to the first modification.

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

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

  In the display mode using the tunable light function, the dimming light amount is changed in accordance with an operation for the input image 0 input to the projection display 100-1 or the image X obtained by scaling the input image 0. There is a second display mode for displaying an image X obtained by scaling the input image 0 while the image X is being scaled. In FIG. 16, a video X obtained by scaling (reducing) the input video 0 is set as a calculation target. This second display mode is a single display mode.

  In the projection-type image display device 100-1 according to the first modification, the output to the other projection-type image display device 100-2 does not necessarily need to be provided, and the output need not be provided.

<< Menu Screen in Modification Example 1 >>
A menu screen according to the first modification will be described with reference to FIG. FIG. 17 is a diagram illustrating a menu screen according to the first modification.

  As shown in FIG. 17, the input video-linked modulatable light function mode menu as the menu screen in the first modification includes a multi-screen projection mode as the first display mode and a single display mode as the second display mode. There is. Further, the input video-linked modulated light function mode menu also has a mode for turning off the input-video linked modulated light function.

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

  As illustrated in FIG. 18, in an example in which n projection-type video display devices 100-1, 100-2, ..., 100-n are connected to the information processing device 300a, the information processing device 300a The input video 0 is output to each of the video display devices 100-1, 100-2,..., 100-n. Using this as an input, each of the projection-type image display devices 100-1, 100-2,..., 100-n determines the dimming amount according to the entirety of the input image 0. .., N set by the projection type video display devices 100-1, 100-2,..., 100-n, that is, the images 1, 2,. Is displayed.

  In this way, when the n projection image display devices 100-1 to 100-n perform multi-screen projection, each of the projection image display devices 100-1, 100-2,... , N of the images 1, 2,...

  As described above, in the first modification, a common dimming value can be calculated among the plurality of projection image display devices by the processing on the plurality of projection image display devices according to the present example, and the common light adjustment value can be calculated. A tunable optical function using an optical value can be realized. Therefore, in the first modification, the information processing device 300a does not need to be provided with a function of generating dimming control information, and may be a simple video output device. That is, in the first modification, even if the information processing device 300a is a mere image output device, it is possible to improve the quality of the joint of the projected images in the multi-screen projection mode.

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

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

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

  In the master projection display 100-1, the input video 0 is input, the trimming of the video 1 and the video 2 is designated, and the video 2 is output to the slave projection display 100-2. Dimming control information calculated by an operation (average luminance, histogram, maximum luminance) based on the input video 0 is also output to the projection display 100-2. This dimming control information is used to make the dimming state of the projection display apparatus 100-2 closer to the dimming state of the projection display apparatus 100-1 (to make the dimming value common). This is dimming control information that can control the tunable light function of the projection display 100-2 in units of one frame. At this time, since the projection-type image display device 100-2 performs dimming according to the dimming control information, the dimming value is common to the projection-type image display device 100-1 and the projection-type image display device 100-2. Be transformed into Therefore, it is possible to improve the quality of the joint of the projection images of these devices in the multi-screen projection mode.

<< Master Projection Display Apparatus in Modification 2 >>
A master projection image display device according to Modification 2 will be described with reference to FIG. FIG. 20 is a diagram for describing a master projection-type image display device according to the second modification.

  As shown in FIG. 20, the master projection-type image display device 100-1 according to Modification 2 has a tunable light function (lamp dimming function, variable iris function) and a display mode using the tunable light function. , And one of the display modes can be selected from the menu screen.

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

  Further, in the first display mode, the projection-type image display device 100-2 is calculated for the slave projection-type image display device 100-2 in units of one frame of the projection image, which is calculated in accordance with the operation for the input image 0. -2, dimming control information capable of controlling the tunable light function and video 2 that is different from video 1 and is trimmed from input video 0.

  In the display mode using the tunable light function, the dimming light amount is changed in accordance with an operation for the input image 0 input to the projection display 100-1 or the image X obtained by scaling the input image 0. However, there is a second display mode (single display mode) for displaying the video X obtained by scaling the input video 0.

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

  As shown in FIG. 21, in the data format, one frame of data includes a region for user data in a frame header or a frame unit, and a region for a payload. The payload area contains video information, and the frame header or user data area in frame units contains dimming control information. By performing transmission in such a data format, dimming control in frame units can be realized in the projection type video display device of the transmission destination. This data format may be applied to the case where the video data and the dimming control information are transmitted together in any of the basic example of the present embodiment and other plural modified examples.

<<< Slave Projection Display Apparatus in Modification 2 >>>
A slave projection image display device according to the second modification will be described with reference to FIG. FIG. 22 is a diagram illustrating a projection type video display device of a slave according to the second modification.

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

<< Projection Display Apparatus of Master / Slave in Modification 2 >>
The master / slave projection-type image display device according to Modification 2 has the functions of both the master projection-type image display device 100-1 and the slave projection-type image display device 100-2 described above, and the functions can be switched. A variable projection light display function (lamp dimming function, variable iris function), a plurality of display modes using the variable light function, and one of the plurality of display modes. Can be selected from the menu screen.

  In the display mode using the tunable light function, the image 1 that is trimmed from the input image 0 while changing the dimming amount according to the calculation for the input image 0 that is input to the projection display is displayed. There is a first display mode for displaying (multi-screen projection mode).

  Further, in the display mode using the tunable light function, the luminous intensity is controlled according to the dim control information that can be input to the projection-type image display device and controls the tunable light function for each frame of the projected image. There is a third display mode (multi-screen projection mode) for displaying the input video 2 input to the projection video display while changing.

  In the master / slave projection type video display device according to 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 the third display mode is called a slave mode. That is, there are a plurality of types of multi-screen projection modes.

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

  As shown in FIG. 23, in the input image-linked modulatable light function mode menu as the menu screen in the modification 2, the multi-screen projection mode (master mode) as the first display mode and the third display mode And a single display mode as a second display mode. Further, the input video-linked modulated light function mode menu also has a mode for turning off the input-video linked modulated light function.

  Therefore, in the master / slave projection type video display apparatus of 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. Has multiple types of multi-screen projection modes.

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

  As shown in FIG. 24, in an example in which n projection-type image display devices 100-1, 100-2,..., 100-n are connected to the information processing device 300a, the first projection-type image display device 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 300a outputs the input video 0 to the master projection type video display device 100-1. With this as an input, the master projection display 100-1 designates trimming of the images 1, 2 to n, and transfers the images 2 to n to the slave projections 100-2 to 100-n. And dimming control information calculated by an operation based on the input image 0 and the like is also output to the projection display apparatuses 100-2 to 100-n. The master projection display 100-1 and the slave projections 100-2 to 100-n display the images 1, 2 to n, respectively.

  In this way, when the master projection image display device 100-1 and the slave projection image display devices 100-2 to 100-n perform multi-screen projection, the respective projection image display devices 100-1, 100 , 100-n, the quality of the joint of the images 1, 2,..., N displayed can be improved.

  As described above, in the second modification, a common dimming value can be calculated among the plurality of projection image display devices by the processing on the plurality of projection image display devices according to the present example, and the common light adjustment value can be calculated. A tunable optical function using an optical value can be realized. Therefore, in the second modification, the information processing device 300a does not need to have a function of generating dimming control information, and may be a simple video output device. Furthermore, since the information processing device 300a only needs to be connected to the master projection video display device, the above-described effect can be obtained even when the information processing device 300a has only one video output unit. That is, in the second modification, even when the information processing device 300a is a mere image output device and there is only one image output, it is possible to improve the quality of the joint of the projected images in the multi-screen projection mode.

  In the second modification, the trimming process is not required in the slave projection type video display device because the trimming of the image of each projection type video display device is performed by the master projection type video display device.

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

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

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

  In the master projection display 100-1, the input video 0 is input, trimming of the video 1 is designated, and the input video 0 is output to the slave projection video display 100-2 and the input video is output. The dimming control information calculated by a calculation based on 0 (average luminance, histogram, maximum luminance) and the like is also output to the projection display 100-2. This dimming control information is used to adjust the dimming state of the projection display 100-2 to the dimming state of the projection display 100-1 in units of one frame of the projection image. This is dimming control information that can control the tunable light function of 100-2. At this time, since the projection-type image display device 100-2 performs dimming according to the dimming control information, the dimming value is common to the projection-type image display device 100-1 and the projection-type image display device 100-2. Be transformed into Therefore, it is possible to improve the quality of the joint of the projection images of these devices in the multi-screen projection mode. Further, the projection display 100-2 trims the input video 0 output from the projection video display 100-1 into the video 2.

<< Master Projection Display Apparatus in Modification 3 >>
A master projection image display device according to Modification 3 will be described with reference to FIG. FIG. 26 is a diagram for describing a master projection-type image display device according to the third modification.

  As shown in FIG. 26, the master projection-type image display device 100-1 according to Modification 3 has a tunable light function (lamp dimming function, variable iris function) and a display mode using the tunable light function. , And one of the display modes can be selected from the menu screen.

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

  Further, in the first display mode, the projection-type image display device 100-2 is calculated for the slave projection-type image display device 100-2 in units of one frame of the projection image, which is calculated in accordance with the operation for the input image 0. The dimming control information capable of controlling the tunable light function included in -2 and the input video 0 are output.

  In the display mode using the tunable light function, the dimming light amount is changed in accordance with an operation for the input image 0 input to the projection display 100-1 or the image X obtained by scaling the input image 0. However, there is a second display mode (single display mode) for displaying the video X obtained by scaling the input video 0.

<<< Slave Projection Display Apparatus in Modification 3 >>>
A projection type video display device of a slave in Modification 3 will be described with reference to FIG. FIG. 27 is a diagram for explaining a projection type video display device of a slave according to the third modification.

  As shown in FIG. 27, the projection type image display device 100-2 of the slave according to the third modification has a tunable light function (lamp dimming function, variable iris function) and a display mode using the tunable light function. , And one of the display modes can be selected from the menu screen.

  The display mode using the tunable light function is based on dimming control information that is input to the slave projection type video display device 100-2 and that can control the tunable light function in units of one frame of the projected image. There is a display mode (multi-screen projection mode) for displaying an image 2 generated by performing trimming on an input image 0 input to the slave projection type image display device 100-2 while changing the light control amount.

<< Projection Display Apparatus of Master / Slave in Modification 3 >>
The master / slave projection type video display device according to Modification 3 is a projection type video display device which also serves as the above-mentioned master projection type video display device 100-1 and slave projection type video display device 100-2. It has a tunable light function (lamp dimming function, variable iris function), a plurality of display modes using the tunable light function, and one of a plurality of display modes can be selected from a menu screen.

  In the display mode using the tunable light function, the image 1 that is trimmed from the input image 0 while changing the dimming amount according to the calculation for the input image 0 that is input to the projection display is displayed. There is a first display mode for displaying (multi-screen projection mode = master mode).

  Further, in the display mode using the tunable light function, the luminous intensity is controlled based on dim control information that can be input to the projection type video display device and controls the tunable light function for each frame of the projected image. There is a third display mode (multi-screen projection mode = slave mode) for displaying an image 2 obtained by trimming an input image 0 input to the projection display while changing the image.

<< Menu screen in Modification 3 >>
A menu screen according to the third modification will be described with reference to FIG. FIG. 28 is a diagram for explaining a menu screen according to the third modification. FIG. 28 shows an example of a master / slave projection display apparatus.

  As shown in FIG. 28, in the input image linkable modulating light function mode menu as the menu screen in the third modification, the multi-screen projection mode (master mode) as the first display mode and the third display mode And a single display mode as a second display mode. Further, the input video-linked modulated light function mode menu also has a mode for turning off the input-video linked modulated light function.

<< connection example 1 of n units in modification 3 >>
An n-unit connection example 1 in the third modification will be described with reference to FIG. FIG. 29 is a diagram illustrating an n-unit connection example 1 according to the third modification.

  As shown in FIG. 29, in an example in which n projection-type image display devices 100-1, 100-2,..., 100-n are connected to the information processing device 300a, the first projection-type image display device 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 300a outputs the input video 0 to the master projection type video display device 100-1. With this as an input, the master projection display 100-1 designates trimming of the video 1, and further outputs the input video 0 to the slave projections 100-2 to 100-n, The dimming control information calculated by the calculation based on the input video 0 is also output to the projection video display devices 100-2 to 100-n. The master projection display 100-1 and the slave projections 100-2 to 100-n display the images 1, 2 to n, respectively.

  In this way, when the master projection image display device 100-1 and the slave projection image display devices 100-2 to 100-n perform multi-screen projection, the respective projection image display devices 100-1, 100 , 100-n, the quality of the joint of the images 1, 2,..., N displayed can be improved.

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

  As shown in FIG. 30, in an example in which n projection-type image display devices 100-1, 100-2,..., 100-n are connected to the information processing device 300a, the first projection-type image display device 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 300a outputs the input video 0 to the master projection type video display device 100-1. With this as an input, the master projection-type image display device 100-1 specifies trimming of the image 1 and further outputs the input image 0 to the slave projection-type image display device 100-2, The dimming control information calculated by the calculation based on the calculation is also output to the projection display 100-2. In the following order, the projection type video display device 100-2 of the slave outputs the input video 0 and the dimming control information to the projection type video display device 100-3 of the slave, and so on. (N-1) outputs the input video 0 and the dimming control information to the slave projection type video display device 100-n. The master projection display 100-1 and the slave projections 100-2 to 100-n display the images 1, 2 to n, respectively.

  In this way, when the master projection image display device 100-1 and the slave projection image display devices 100-2 to 100-n perform multi-screen projection, the respective projection image display devices 100-1, 100 , 100-n, the quality of the joint of the images 1, 2,..., N displayed can be improved.

  As described above, in the third modification, a common dimming value can be calculated among the plurality of projection-type image display devices by the processing on the plurality of projection-type image display devices according to the present example, and the common dimming value can be calculated. A tunable optical function using an optical value can be realized. Therefore, in the third modification, the information processing device 300a does not need to be provided with a function of generating dimming control information, and may be a simple video output device. Furthermore, since the information processing device 300a only needs to be connected to the master projection video display device, the above-described effect can be obtained even when the information processing device 300a has only one video output unit. That is, in the third modification, even when the information processing device 300a is a mere image output device and there is only one image output, it is possible to improve the quality of the joint of the projected images in the multi-screen projection mode.

  Further, in the third modification, each projection display apparatus outputs the input video 0 as it is, and trims the video with the subsequent projection display apparatus, respectively. There is no need for trimming processing for the type video display device. In addition, the above effect can be obtained even in a daisy chain connection.

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

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

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

  In the master projection display 100-1, the input video 0 is input, trimming of the video 1 and the video 2 is specified, and the input video 0 is output to the slave projection display 100-2. Also, the trimming range specifying information 2 that is information for specifying the trimming range of the video 2 and the dimming control information calculated by an operation (average luminance, histogram, maximum luminance) based on the input video 0 are also displayed on the projection display 100- Output to 2. This dimming control information is used to adjust the dimming state of the projection display 100-2 to the dimming state of the projection display 100-1 in units of one frame of the projection image. This is dimming control information that can control the tunable light function of 100-2. At this time, since the projection-type image display device 100-2 performs dimming according to the dimming control information, the dimming value is common to the projection-type image display device 100-1 and the projection-type image display device 100-2. Be transformed into Therefore, it is possible to improve the quality of the joint of the projection images of these devices in the multi-screen projection mode.

<< Master Projection Display Apparatus in Modification 4 >>
A master projection image display device according to Modification 4 will be described with reference to FIG. FIG. 32 is a diagram for describing a master projection-type image display device according to the fourth modification.

  As shown in FIG. 32, the master projection type image display device 100-1 according to Modification 4 has a tunable light function (lamp dimming function, variable iris function) and a display mode using the tunable light function. , And one of the display modes can be selected from the menu screen.

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

  Further, in the first display mode, the projection-type image display device 100-2 is calculated for the slave projection-type image display device 100-2 in units of one frame of the projection image, which is calculated in accordance with the operation for the input image 0. -2, dimming control information capable of controlling the tunable light function, input video 0, and trimming range designation information for trimming the input video 0 are output. 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 image of the slave in response to the operation input to the operation input unit 107. For each of the images 2 displayed on the display device 100-2, it is possible to set a trimming range to be displayed by trimming from the input image 0, and among them, the image displayed on the slave projection type image display device 100-2. The trimming range designation information, which is information on the trimming range for No. 2, is output.

  In the display mode using the tunable light function, the dimming light amount is changed in accordance with an operation for the input image 0 input to the projection display 100-1 or the image X obtained by scaling the input image 0. However, there is a second display mode (single display mode) for displaying the video X obtained by scaling the input video 0.

<<< Slave Projection Display Apparatus in Modification 4 >>>
A projection type video display device of a slave according to Modification 4 will be described with reference to FIG. FIG. 33 is a diagram for describing a projection type video display device of a slave according to the fourth modification.

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

  The display mode using the tunable light function is based on dimming control information that is input to the slave projection type video display device 100-2 and that can control the tunable light function in units of one frame of the projected image. The image 2 obtained by trimming the input image 0 input to the slave projection type image display device 100-2 using the trimming range designation information input to the projection type image display device 100-2 while changing the light control amount Is displayed (multi-screen projection mode).

<< Projection Display Apparatus of Master / Slave in Modification 4 >>
The master / slave projection-type image display device according to Modification 4 is a projection-type image display device that also serves as the master projection-type image display device 100-1 and the slave projection-type image display device 100-2 described above. It has a tunable light function (lamp dimming function, variable iris function), a plurality of display modes using the tunable light function, and one of a plurality of display modes can be selected from a menu screen.

  In the display mode using the tunable light function, the image 1 that is trimmed from the input image 0 while changing the dimming amount according to the calculation for the input image 0 that is input to the projection display is displayed. There is a first display mode for displaying (multi-screen projection mode = master mode).

  Further, in the display mode using the tunable light function, the luminous intensity is controlled based on dim control information that can be input to the projection type video display device and controls the tunable light function for each frame of the projected image. A third display mode (multi-screen projection mode = multi-screen projection mode =) in which an input image 0 input to the projection type video display device is displayed while the image 2 is trimmed using the trimming range designation information input to the projection type video display device while changing. Slave mode).

<< Menu Screen in Modification Example 4 >>
A menu screen according to Modification 4 will be described with reference to FIG. FIG. 34 is a diagram for describing a menu screen according to the fourth modification. FIG. 34 shows an example of a master / slave projection display apparatus.

  As shown in FIG. 34, in the input image-linked modulatable light function mode menu as the menu screen in the modification 4, the multi-screen projection mode (master mode) as the first display mode and the third display mode And a single display mode as a second display mode. Further, the input video-linked modulated light function mode menu also has a mode for turning off the input-video linked modulated light function.

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

  As shown in FIG. 35, in an example in which n projection-type image display devices 100-1, 100-2,..., 100-n are connected to the information processing device 300a, the first projection-type image display device 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 300a outputs the input video 0 to the master projection type video display device 100-1. Using this as an input, the master projection-type image display device 100-1 specifies trimming of the video 1 and the videos 2 to n in accordance with the operation input input to the operation input unit 107, and further sets the input video 0 as a slave. To the projection type video display devices 100-2 to 100-n, and dimming calculated by calculation based on the input video 0 and trimming range specification information 2 to n for specifying the trimming range for the video 2 to n. The control information is also output to each of the projection type video display devices 100-2 to 100-n. The master projection display 100-1 and the slave projections 100-2 to 100-n display the images 1, 2 to n, respectively.

  In this way, when the master projection image display device 100-1 and the slave projection image display devices 100-2 to 100-n perform multi-screen projection, the respective projection image display devices 100-1, 100 , 100-n, the quality of the joint of the images 1, 2,..., N displayed can be improved.

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

  As shown in FIG. 36, in an example in which n projection-type image display devices 100-1, 100-2,..., 100-n are connected to the information processing device 300a, the first projection-type image display device 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 300a outputs the input video 0 to the master projection type video display device 100-1. Using this as an input, the master projection-type image display device 100-1 designates trimming of the images 1 to n in accordance with the operation input input to the operation input unit 107, and further, inputs the input image 0 to the projection type of the slave. A trimming range specification list that is output to the video display device 100-2 and that specifies a trimming range of the videos 2 to n other than the video 1, and dimming control information calculated by an operation based on the input video 0 and the like. Is also output to the projection display 100-2. That is, the trimming range designation list is a series of trimming range designation information including trimming range designation information for designating a trimming range of images 2 to n in a plurality of slave projection image display devices 100-2 to 100-n. This is a list including information, and when performing the trimming process in each projection type video display device, the corresponding trimming range designation information can be used. In the following order, the slave projection type video display device 100-2 outputs the input video 0, the trimming range designation list, and the dimming control information to the slave projection type video display device 100-3. The video display device 100- (n-1) outputs the input video 0, the trimming range designation list, and the dimming control information to the slave projection video display device 100-n. The master projection display 100-1 and the slave projections 100-2 to 100-n display the images 1, 2 to n, respectively.

  In this way, when the master projection image display device 100-1 and the slave projection image display devices 100-2 to 100-n perform multi-screen projection, the respective projection image display devices 100-1, 100 , 100-n, the quality of the joint of the images 1, 2,..., N displayed can be improved.

  As described above, in the fourth modification, a common dimming value can be calculated among the plurality of projection image display devices by the processing on the plurality of projection image display devices according to the present example, and the common light adjustment value can be calculated. A tunable optical function using an optical value can be realized. Therefore, in the fourth modification, the information processing device 300a does not need to be provided with a function of generating dimming control information, and may be a simple video output device. Furthermore, since the information processing device 300a only needs to be connected to the master projection video display device, the above-described effect can be obtained even when the information processing device 300a has only one video output unit. That is, in the fourth modification, even when the information processing device 300a is a mere video output device and there is only one video output, it is possible to improve the quality of the joint of the projection video in the multi-screen projection mode.

  Further, in the modified example 4, since each projection-type image display device outputs the input image 0 as it is, and the subsequent projection-type image display device trims the respective images, the master projection-type image display device has the following slave projection. There is no need for trimming processing for the type video display device. However, since the designation of the trimming range is performed by the master projection video display device, the user does not need to set the trimming in each of the slave projection video display devices, so that the operation of the entire system becomes easy. In addition, the above effect can be obtained even in a daisy chain connection.

<Further Modifications of Modifications 3 and 4>
In the above-described third and fourth modifications, the dimming control calculated by the input image 0 and the master projection type video display device from the projection type video display device at the front stage of the system to the projection type video display device at the subsequent stage is performed. The configuration for outputting information together has been described.

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

  That is, if the dimming value calculated from the input image 0 by the projection type video display device at the latter stage of the system is the same as the dimming value of the projection type video display device at the previous stage of the system, the same as the above-described Modifications 3 and 4 The effect of can be obtained.

  In order to realize this, in the above-described Modifications 3 and 4, the projection-type image display device at the front stage of the system does not output the dimming control information, and In place of the dimming process according to the light control information, a dimming process using the dimming value calculated based on the entire input video 0 (resulting in the same dimming value as that of the preceding projection image display device) is performed. Just do it.

<Modification 5>
Modification 5 will be described. Modification Example 5 is an example in which an image quality control interlocking function is added to <Basic Example>, <Modification Example 1>, <Modification Example 2>, <Modification Example 3>, and <Modification Example 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 for controlling 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 a gradation characteristic of an image. Bright adjustment is processing for changing luminance. The contrast adjustment is a process of changing a contrast curve of an image.

  In the multi-screen projection mode, the adjustment parameters of the entire screen image quality control are generated simultaneously by the master projection type video display device when dimming control information is generated, and output as image quality adjustment designation information to other projection type video display devices. However, other projection-type image display devices are used instead of the image quality control in the individual projection-type image display devices, or in addition to this, the entire screen image quality control based on the image quality adjustment designation information generated by the master projection-type image display device. I do.

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

  The local image quality adjustment function is a local image quality adjustment function that adjusts the image quality for each image performed by the image adjustment unit 160 shown in FIG. 1 of each projection type video display device. This function inhibits image quality adjustment. The local image quality adjustment function includes partial contrast control and Retinex control. The 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 for each component.

The local image quality adjustment prohibition function is performed so that, for example, the local image quality adjustment function is forcibly turned off during the display mode by multi-screen projection in the respective image adjustment units 160 of the master projection image display device and the slave projection image display device. It is configured. (In the single display mode, the local image quality adjustment function may be configured so that the user can switch ON and OFF from the setting menu.)
Note that the local image quality adjustment prohibition function is not indispensable, and depending on the control of each image region, even when the image quality adjustment is turned on, the joint is substantially inconspicuous even in a projection-type image display device having a different image display range. In some cases, the configuration may not be forcibly turned off.

<Variation 7>
Modification 7 will be described with reference to FIGS. In the seventh modification, the brightnesses of the plurality of projection-type image display devices described in the <basic example>, <the first modification>, <the second modification>, <the third modification>, and the fourth modification are described above. This is an example in which a response to a case where the brightness is originally non-uniform due to an individual difference of each light source or the like (a case where the brightness is non-uniform even when the same video signal is input with the input video-linked variable light function turned off) is added.

  FIG. 37 is a diagram for describing the configuration of the nonvolatile memory according to the seventh modification. As shown in FIG. 37, in the nonvolatile memory 108 (or the storage unit 170) shown in FIG. 1, a display element driving control program 108a for controlling the driving of the display element 102, dimming control of the light source 105 (lamp dimming) And a variable aperture dimming control program 108c for performing dimming control of the variable aperture 120 (variable iris function). In the modification 7, at least two of the three programs are stored, and the control unit 110 can develop these programs in the memory 109 and perform various controls in cooperation.

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

  FIG. 38 is a diagram for describing control by the control unit 110 according to the seventh modification. As shown in FIG. 38, the control unit 110 is configured to provide a second light source for reducing the brightness of the projection light between the plurality of projection display devices when the same video signal is input when the input video interlocking modulatable light function is OFF. 1 (S1), and then perform a second control for performing the input video-linked modulatable light when the input video-linked variable light function of the plurality of projection-type video display devices is ON (S2). . In this case, the control unit 110 makes a different combination of controls used for adjusting the brightness between the first control and the second control. Further, the dimming function used in the second control is not used in the first control.

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

  In Example 3, the first control is drive control of the display element 102 (entire screen), and the second control is dimming control of the variable aperture 120. The advantage of the third example is that the variation between the projection type video display devices at the middle luminance can be reduced, and the dimming control of the light source 105 can be eliminated. Example 4 is a case where the first control is the driving control of the display element 102 (the entire screen) and the second control is the dimming control of the light source 105, and the dimming control of the variable aperture 120 is not required. it can.

  In Example 5, the first control is a combination of drive control of the display element 102 (entire screen or overlapping area) and dimming control of the light source 105, and the second control is dimming control of the variable aperture 120. The advantage of this example 5 is that the variation between the projection type video display devices at the middle luminance can be reduced. Example 6 is a case where the first control is a combination of the drive control of the display element 102 (the entire screen or the overlapping area) and the dimming control of the variable aperture 120, and the second control is the dimming control of the light source 105. There is an advantage similar to that of Example 5.

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

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

  If a plurality of projection image display devices of the same model having the same dimming characteristics are prepared and the same dimming control signal is applied, similar illuminance can be easily obtained in the plurality of projection image display devices. On the other hand, it is difficult to calculate a dimming control signal for obtaining a desired irradiation illuminance by calculation. In some cases, it is possible to provide an illuminance sensor, but the cost is high.

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

  In the seventh modification, the first control is a control for reducing the variation of the irradiation light between the projection-type image display devices, and is a technique for positively changing the control signal of the dimming function. On the other hand, the second control is a control for making the dimming function between the projection type video display devices to have the same characteristics as much as possible. Here, if the dimming control used for the second control is used for the first control, the dimming control range (for example, the range of the dimming control signal on the horizontal axis in FIG. 40) used for the second control becomes plural. Between the projection type video display devices. As described with reference to FIG. 40, since the dimming characteristics of the variable aperture 120 and the dimming characteristics of the light source 105 are not linear, the dimming control range varied among a plurality of projection-type image display devices due to the first control. Will occur as illuminance variation in the second control.

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

  In each of the embodiments of the present invention described above, the dimming control by calculating the dimming value in units of one frame has been described. However, in the case of units of frames, it is not always necessary to perform the dimming value change control in units of one frame. The dimming value change control may be performed every several frames.

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

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

  As a result, according to the projection display apparatus 100 of the present embodiment, it is possible to more preferably make the inconspicuous joint of the video and the high dynamic range of the video compatible at the time of multi-screen projection.

  As described above, the invention made by the inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the gist of the invention. Needless to say.

  The above embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described above. Further, it is possible to add, delete, or replace another configuration with respect to a part of the configuration (basic example, each modified example) of the above embodiment.

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

Claims (23)

A projection-type image display device,
An image input unit for inputting an input image,
Light source,
A display element that receives light generated by the light source, transmits or reflects the light,
A projection optical system that projects light from the display element as a display image,
A modulatable light function for changing the amount of light incident on the display element,
With
Provided with a plurality of display modes related to the tunable light function, one of the plurality of display modes can be selected from a menu screen,
The display mode of the display image related to the tunable light function,
A plurality of projection-type image display devices including one master device and one or more slave devices, wherein the plurality of projection-type image display devices are connected continuously with the master device as a starting end and the last slave device as an end. Or a display mode as a slave device included in a plurality of slave devices, wherein the image is generated while changing the dimming amount according to dimming control information generated by the master device and capable of controlling the tunable light function. A first display mode for displaying an image based on a first input image input at the input unit;
A second display mode for displaying an image based on the second input image while changing the light intensity in accordance with a second input image input in the image input unit;
There is
In the first display mode,
The first input video input in the video input unit constitutes a part of a range of a video that is larger than the first input video,
The dimming control information is generated in the master device based on an operation using an image having a range larger than the first input image, and is generated in accordance with the content of the image having a range larger than the first input image. A projection type video display device which is control information that changes. It is a projection type video display apparatus of Claim 1, Comprising:
The display mode of the display image related to the tunable light function further includes a third display mode for turning off the tunable light function.
Projection type video display device. It is a projection type video display apparatus of Claim 2, Comprising:
A first image quality adjustment process that uniformly affects the entirety of an input image input in the image input unit, and a second image quality adjustment process in which image quality adjustment performed on the input image input in the image input unit is locally different With an image quality adjustment function that can
In the first display mode, there is a state in which the execution of the first image quality adjustment process is permitted and the execution of the second image quality adjustment process is prohibited.
Projection type video display device. It is a projection type video display apparatus of Claim 3, Comprising:
In the second display mode or the third display mode, there is a state in which execution of both the first image quality adjustment process and the second image quality adjustment process is permitted.
Projection type video display device. It is a projection type video display apparatus as described in any one of Claims 1-4, Comprising:
Further, a second modulating light function capable of changing a dimming amount by dimming means different from the dimming means used for the tunable light function.
Projection type video display device. It is a projection type video display apparatus of Claim 5, Comprising:
The second tunable light function is, when using the projection type video display device and another projection type video display device, the tunable light function is turned off when both related images are displayed simultaneously. Is used to make the boundary between the projected images of the two inconspicuous,
Dimming means used for the tunable light function is not used for the second tunable light function,
Projection type video display device. A projection-type image display device,
An image input unit for inputting an input image,
Light source,
A display element that receives light generated by the light source, transmits or reflects the light,
A projection optical system that projects light from the display element as a display image,
A modulatable light function for changing the amount of light incident on the display element,
With
A plurality of display modes using the tunable light function is provided, one of the plurality of display modes can be selected from a menu screen,
The display mode of the display image using the tunable light function,
As a master device in a connection state in which a plurality of projection-type image display devices including one master device and one or more slave devices are continuously connected with the master device as a starting end and the last slave device as an end. In the display mode, while displaying a second video having a smaller range than the input video generated by performing a trimming process on the input video, a video in a range larger than the second video is targeted. There is a display mode that changes the light intensity according to the calculation.
Projection type video display device. It is a projection type video display apparatus of Claim 7, Comprising:
An image to be calculated in the display mode, an image in a range larger than the second image is the input image.
Projection type video display device. It is a projection type video display apparatus of Claim 7, Comprising:
The display mode using the tunable light function, further, there is another display mode to turn off the tunable light function,
Projection type video display device. It is a projection type video display apparatus of Claim 7, Comprising:
In the display mode using the tunable light function, further, while changing the dimming amount according to the input image or the image obtained by scaling the input image, another image that displays the image obtained by scaling the input image. There is a display mode,
Projection type video display device. It is a projection type video display apparatus of Claim 7, Comprising:
A video output unit,
The image output unit and a separate or integrated control information output unit,
In the display mode,
From the video output unit, a video to be displayed on an external projection video display device included in the one or more slave devices, and a third video different from the second video, Output to the projection type video display device,
Dimming control capable of controlling the tunable light function of the external projection type video display device, which is calculated from the control information output unit based on the calculation for video in a range larger than the second video. Outputting information to the external projection type video display device,
Projection type video display device. It is a projection type video display apparatus of Claim 11, Comprising:
The image to be calculated in the display mode, the image in a range larger than the second image is the input image,
Projection type video display device. It is a projection type video display apparatus of Claim 11, Comprising:
The display mode using the tunable light function further includes a display mode different from the display mode, wherein a plurality of projection-type image displays including one master device and one or more slave devices are provided. There is a display mode as a slave device included in the one or more slave devices in a connection state in which the device is continuously connected with the master device as a starting end and the last slave device as an end,
In the display mode as the slave device, a projection-type image display device that displays the input image while changing a dimming amount in accordance with dimming control information generated by the master device. It is a projection type video display apparatus of Claim 7, Comprising:
A video output unit,
The image output unit and a separate or integrated control information output unit,
In the display mode,
From the video output unit, output the input video to an external projection video display device included in the one or more slave devices,
From the control information output unit, the video output from the video output unit, trimming range designation information for performing trimming processing in the external projection type video display device, output to the external projection type video display device,
Dimming control for designating a dimming light amount in the external projection type video display device, which is calculated from the control information output unit based on the calculation for a video in a range larger than the second video. Outputting information to the external projection type video display device,
Projection type video display device. It is a projection type video display apparatus according to claim 14,
The image to be calculated in the display mode, the image in a range larger than the second image is the input image,
Projection type video display device. It is a projection type video display apparatus according to claim 14,
The display mode using the tunable light function further includes a display mode different from the display mode, wherein a plurality of projection-type image displays including one master device and one or more slave devices are provided. There is a display mode as a slave device included in the one or more slave devices in a connection state in which the device is continuously connected with the master device as a starting end and the last slave device as an end,
In the display mode as the slave device, a trimming process is performed on the input video using the trimming range designation information generated by the master device while changing the dimming amount according to the dimming control information generated by the master device. A projection-type image display device that displays an applied image. It is a projection type video display apparatus of Claim 11 or 14, Comprising:
From the control information output unit, output control information for controlling an image quality adjustment function different from the tunable light function in the external projection type video display device,
Projection type video display device. It is a projection type video display apparatus of Claim 17, Comprising:
The control information for controlling the image quality adjustment function different from the tunable light function is brightness adjustment, contrast adjustment, gamma adjustment, or control information about Retinex processing.
Projection type video display device. It is a projection type video display apparatus of Claim 7, Comprising:
A first image quality adjustment process that uniformly affects the entirety of the input image; and an image quality adjustment function capable of performing a second image quality adjustment process in which image quality adjustment for the input image is locally different,
In the display mode, there is a state in which the execution of the first image quality adjustment process is permitted and the execution of the second image quality adjustment process is prohibited.
Projection type video display device. It is a projection type video display apparatus of Claim 9, Comprising:
A first image quality adjustment process that uniformly affects the entirety of the input image; and an image quality adjustment function capable of performing a second image quality adjustment process in which image quality adjustment for the input image is locally different,
In the another display mode, there is a state in which both the first image quality adjustment process and the second image quality adjustment process are permitted.
Projection type video display device. It is a projection type video display apparatus of Claim 10, Comprising:
A first image quality adjustment process that uniformly affects the entirety of the input image; and an image quality adjustment function capable of performing a second image quality adjustment process in which image quality adjustment for the input image is locally different,
In the another display mode, there is a state in which both the first image quality adjustment process and the second image quality adjustment process are permitted.
Projection type video display device. It is a projection type video display apparatus as described in any one of Claims 7-21, Comprising:
The projection display apparatus further has a second modulatable light function capable of changing the dimming amount by a dimming unit different from the dimming unit used for the modulating light function.
Projection type video display device. It is a projection type video display apparatus of Claim 22, Comprising:
The second tunable light function is, when using the projection type video display device and another projection type video display device, the tunable light function is turned off when both related images are displayed simultaneously. The variable light function used to make the boundary between the projected images of the two inconspicuous,
Dimming means used for the tunable light function is not used for the second tunable light function,
Projection type video display device.

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