Control method for display system, control method for display device, and display device

Abstract

To provide a control method for a display system that displays an image of a large screen on a display surface without deteriorating image quality.SOLUTION: A projector 100A executes receiving a first image 50a by a first reception section 111A included in the projector 100A, receiving a second image 50b by a second reception section 113A included in the projector 100A, generating a first composite image 21A including the first image 50a and a part of the second image 50b, and displaying the first composite image 21A on a projection surface 10. A projector 100B executes receiving the second image 50b by a first reception section 111B included in the projector 100B, and displaying the second image 50b on the projection surface 10.SELECTED DRAWING: Figure 4

Description

Technical Field

[0005] , ,

[0001] The present invention relates to a method for controlling a display system, a method for controlling a display device, and a display device.

Background Art

[0002] Conventionally, a display system that displays one image using a plurality of display devices has been known. For example, Patent Document 1 discloses a multi-projection system in which a plurality of projectors are daisy-chain connected and image data is transmitted from a projector with a higher rank in the order of receiving image data in the daisy chain to a projector with a lower rank.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when realizing the display of a large-screen image by transferring one image to be displayed by a plurality of display devices among the plurality of daisy-chain-connected display devices, since there is a limit to the size of an image that can be transmitted and received by one interface of the display device, it is impossible to handle an image having a size larger than the image size that can be transmitted and received by one interface among the plurality of daisy-chain-connected display devices.

Means for Solving the Problems

[0005] This disclosure relates to a method for controlling a display system, wherein a first display device performs the following: receiving a first image through a first interface provided by the first display device; receiving a second image through a second interface provided by the first display device; generating a first composite image including the first image and a part of the second image; and displaying the first composite image on a display surface; a second display device performs the following: receiving a second image through a third interface provided by the second display device; and displaying the second image on the display surface; the first composite image includes a first region which is a part of the first composite image; a first superimposed region which is a part of the first composite image and includes a part of the second image; and the second image includes a second superimposed region which includes a part of the second image and is superimposed on the first superimposed region on the display surface; and a second region which is a part of the second superimposed region of the second image.

[0006] This disclosure provides a control method for a display device, which includes receiving a first image through a first interface provided by the display device, receiving a second image through a second interface provided by the display device, generating a first composite image including the first image and a part of the second image, and displaying the first composite image on a display surface, wherein the first composite image includes a first region which is a part of the first composite image and a first superimposed region which is a part of the first composite image different from the first region and includes a part of the second image, and a part of the second image is displayed by another display device in the area of ​​the display surface where the first superimposed region is displayed.

[0007] This disclosure relates to a display device comprising: a first interface for receiving a first image; a second interface for receiving a second image; and a control unit that performs the following actions: generating a first composite image including the first image and a part of the second image; and displaying the first composite image on a display surface, wherein the first composite image includes a first region which is a part of the first composite image; and a first superimposed region which is a part of the first composite image different from the first region and includes a part of the second image, and a part of the second image is displayed by another display device in the area of ​​the display surface where the first superimposed region is displayed. [Brief explanation of the drawing]

[0008] [Figure 1] A diagram showing the system configuration of the projection system. [Figure 2] A block diagram showing the configuration of the projector. [Figure 3] This diagram shows the state where the first image and the second image are displayed on the projection surface. [Figure 4] A diagram showing the connection configuration between the image supply device and the projector. [Figure 5] Figure showing the first composite image. [Figure 6] Figure showing the second composite image. [Figure 7] A diagram showing an image based on the first image. [Figure 8] A diagram showing an image based on the second image. [Figure 9] A flowchart illustrating the operation of a projector. [Figure 10] A diagram showing the connection configuration when six projectors are connected. [Figure 11] This diagram shows the state in which the first image, second image, and third image are displayed on the projection surface. [Modes for carrying out the invention]

[0009] 1. System configuration of the display system Figure 1 shows the system configuration of display system 1. The display system 1 comprises multiple projectors 100 and an image supply device 300. Figure 1 shows a configuration in which the display system 1 is equipped with four projectors 100A, 100B, 100C, and 100D, but the number of projectors 100 is not limited to four. In the following description, when it is not necessary to distinguish between projectors 100A, 100B, 100C, and 100D, they will be referred to as projector 100. Projector 100A corresponds to the first display device, projector 100B corresponds to the second display device, projector 100C corresponds to the third display device, and projector 100D corresponds to the fourth display device.

[0010] The image supply device 300 can be, for example, a notebook PC (Personal Computer), a desktop PC or tablet device, a smartphone, or a PDA (Personal Digital Assistant).

[0011] Figure 1 shows an example in which projectors 100A, 100B, 100C, and 100D are arranged in a line horizontally on the projection surface 10. The projectors 100A, 100B, 100C, and 100D may also be arranged vertically on the projection surface 10. Projectors 100A, 100B, 100C, and 100D each project image light onto the projection surface 10 to display an image on the projection surface 10. The area of ​​the projection surface 10 on which images are displayed by projectors 100A, 100B, 100C, and 100D is called the display area 30. The projection surface 10 corresponds to the display surface.

[0012] The display area 30 of the projection surface 10 is divided into four areas. The display area 30 on which projector 100A displays an image is called display area 30A. The display area 30 on which the projector 100B displays an image is called the display area 30B. The display area 30 on which the projector 100C displays an image is called the display area 30C. The display area 30 on which the projector 100D displays an image is referred to as display area 30D. The display area 30A corresponds to the first display area. The display area 30B corresponds to the second display area. The display area 30C corresponds to the third display area. The display area 30D corresponds to the fourth display area. The display area 30A and the display area 30B are adjacent in the first direction which is the horizontal direction of the projection surface 10. FIG. 1 shows an example in which the projectors 100A, 100B, 100C, and 100D are arranged in a row in the horizontal direction of the projection surface 10, but the projectors 100A, 100B, 100C, and 100D may be arranged side by side in the vertical direction of the projection surface 10. In this case, the display area 30A and the display area 30B are adjacent in the second direction which is the vertical direction of the projection surface 10.

[0013] In a view of the drawing, the right end portion of the display area 30C overlaps with the left end portion of the display area 30A. In a view of the drawing, the right end portion of the display area 30A overlaps with the left end portion of the display area 30B. In a view of the drawing, the right end portion of the display area 30B overlaps with the left end portion of the display area 30D.

[0014] In a view of the drawing, the area where the right end portion of the display area 30C and the left end portion of the display area 30A overlap is referred to as display overlapping area 31. The area where the right end portion of the display area 30A and the left end portion of the display area 30B overlap is referred to as display overlapping area 33. The area where the right end portion of the display area 30B and the left end portion of the display area 30D overlap is referred to as display overlapping area 35.

[0015] In the display superimposed area 31, edge blending is performed to adjust the brightness of the image displayed by projector 100A and the image displayed by projector 100C. Specifically, projector 100C adjusts the brightness of the image displayed in the display superimposed area 31 so that the difference in brightness between the area of ​​display area 30C where only projector 100C displays an image and the display superimposed area 31 becomes small. Similarly, projector 100A adjusts the brightness of the image displayed in the display superimposed area 31 so that the difference in brightness between the area of ​​display area 30A where only projector 100A displays an image and the display superimposed area 31 becomes small. The same applies to the display superimposed areas 33 and 35.

[0016] 2. Projector Configuration Figure 2 is a block diagram showing the configuration of projector 100A. The configuration of Projector 100A will be explained with reference to Figure 2. Projectors 100A, 100B, 100C, and 100D have substantially the same configuration. Therefore, the configuration of projector 100A will be described as a representative example of projector 100.

[0017] Projector 100A comprises an image interface 110A, a remote control receiver 120A, an image processing unit 130A, a frame memory 135A, an image projection unit 140A, and a control unit 150A. Hereinafter, the interface will be abbreviated as I / F.

[0018] The image interface 110A includes a connector and interface circuitry and is connected to another projector 100 or image supply device 300. In this embodiment, the case where the image interface 110A is an HDMI interface compliant with the HDMI standard will be described. HDMI is an abbreviation for High-Definition Multimedia Interface. HDMI is a registered trademark.

[0019] The image interface 110A comprises a first receiver 111A, a second receiver 113A, a first transmitter 115A, and a second transmitter 117A. The first receiver 111A and the second receiver 113A are equipped with an HDMI connector and an HDMI receiver. The first transmitter 115A and the second transmitter 117A are equipped with an HDMI connector and an HDMI transceiver. The connection configuration of the image I / F 110 for projectors 100A, 100B, 100C, and 100C will be explained with reference to Figures 3 and 4.

[0020] The remote control receiver 120A receives an infrared signal transmitted from the remote control 5 and outputs an operation signal corresponding to the operation indicated by the received infrared signal to the control unit 150A. The remote control 5 is equipped with controls for operating the user interface. When a control is operated by the user, the remote control 5 transmits an infrared signal corresponding to the operated control.

[0021] The image processing unit 130A is connected to the frame memory 135A. The image processing unit 130A expands the images input from the control unit 150A and the image interface 110A into the frame memory 135A. The frame memory 135A has multiple banks. Each bank has a storage capacity that can write one frame's worth of images. The frame memory 135A is configured, for example, as SDRAM (Synchronous Dynamic Random Access Memory).

[0022] The image processing unit 130A performs image processing on the image expanded in the frame memory 135A, such as resolution conversion or resizing, distortion correction, shape correction, digital zoom, and adjustment of image hue and brightness. The image processing unit 130A executes the image processing specified by the control unit 150A and, if necessary, uses parameters input from the control unit 150A. The image processing unit 130A can also, of course, combine and execute multiple of the above image processing operations. The image processing unit 130A reads the processed image from the frame memory 135A and outputs the read image to the image projection unit 140A.

[0023] The image processing unit 130A and the frame memory 135A are composed of, for example, integrated circuits. Integrated circuits include LSIs (Large Scale Integrated Circuits), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), FPGAs (Field-Programmable Gate Arrays), SoCs (System-on-a-chip), etc. Furthermore, the configuration of the integrated circuit may include analog circuits as part of its configuration, and the control unit 150A may be a combination of an integrated circuit and an integrated circuit.

[0024] The image projection unit 140A includes a light source 141A, an optical modulator 143A, and an optical unit 147A.

[0025] The light source 141A includes a discharge-type light source lamp such as an ultra-high pressure mercury lamp or a metal halide lamp, or a solid-state light source such as a light-emitting diode or a semiconductor laser. The light emitted from the light source 141A is incident on the light modulation device 143A.

[0026] The optical modulator 143A includes an optical modulator element that modulates the light emitted from the light source 141A. In this embodiment, the optical modulator element is a transmissive liquid crystal panel 145A in which liquid crystal is sealed between a pair of transparent substrates. The liquid crystal panel 145A includes a panel area consisting of a plurality of pixels arranged in a matrix. The optical modulator 143A applies a drive voltage corresponding to the input image to each pixel in the panel area, changing the light transmittance of each pixel to a transmittance corresponding to the image. The light emitted from the light source 141A is modulated as it passes through the liquid crystal panel 145A, and image light corresponding to the image is generated.

[0027] The optical modulation element of the optical modulation device 143A is not limited to a transmissive liquid crystal panel; for example, it may be a reflective liquid crystal panel or a DMD (Digital Micromirror Device).

[0028] The optical unit 147A includes a projection lens (not shown) and projects the image light modulated by the optical modulator 143A onto the projection surface 10. As a result, the projection image, which corresponds to the image light, is displayed on the projection surface 10.

[0029] The control unit 150A is a computer device comprising a storage unit 160A and a processor 170A.

[0030] The memory unit 160A includes non-volatile memory such as ROM (Read Only Memory) and volatile memory such as RAM (Random Access Memory). The ROM stores the control program 165A used to control the operation of the projector 100A and various setting information. The RAM is used for temporary storage of various data.

[0031] The processor 170A is a processing unit that includes one or more CPUs (Central Processing Units) or MPUs (Micro-Processing Units). The processor 170A executes the control program 165A to control the operation of each part of the projector 100.

[0032] 3. Image displayed on the projection surface Figure 3 shows the state in which the first image 50a and the second image 50b are displayed on the projection surface 10. The first image 50a and the second image 50b are images output by the image supply device 300 as a multi-display screen, that is, two screens as a single continuous screen. The first image 50a is displayed in display area 30C, display area 30A, and display area 30B. Therefore, it is necessary to supply an image signal including the first image 50a to projectors 100A, 100B, and 100C. The image signal including the first image 50a is called the first image signal S1. The second image 50b is displayed in display area 30A, display area 30B, and display area 30D. Therefore, it is necessary to supply an image signal including the second image 50b to projectors 100A, 100B, and 100D. The image signal including the second image 50b is called the second image signal S2.

[0033] 4. Connecting Projector 100 Figure 4 shows the connection configuration between the image supply device 300 and projectors 100A, 100B, 100C, and 100D. S1 in Figure 4 represents the first image signal S1, and S2 in Figure 4 represents the second image signal S2. The image supply device 300 comprises a first transmission unit 310 and a second transmission unit 330. The first transmitter 310 is connected to the first receiver 111A of the projector 100A by an HDMI cable 201. The image supply device 300 transmits a first image signal S1, including the first image 50a, to the projector 100A via the first transmitter 310. The projector 100A receives the first image signal S1 via the first receiver 111A. The first receiver 111A corresponds to the first interface.

[0034] The second transmitter 330 is connected to the first receiver 111B of the projector 100B via an HDMI cable 211. The image supply device 300 transmits a second image signal S2, including the second image 50b, to the projector 100B via the second transmitter 330. The projector 100B receives the second image signal S2 via the first receiver 111B. The first receiver 111B corresponds to the third interface.

[0035] Projectors 100A, 100B, 100C, and 100D are connected by two daisy-chain connections. The first daisy-chain connection connects projector 100A, projector 100C, and projector 100B. The second daisy-chain connection connects projector 100B, projector 100D, and projector 100A.

[0036] First, let's explain the daisy-chain connection of the first system. The first transmitter 115A of projector 100A and the first receiver 111C of projector 100C are connected by an HDMI cable 203. The first transmitter 115C of projector 100C and the second receiver 113B of projector 100B are connected by an HDMI cable 205.

[0037] Projector 100A extracts the first image 50a contained in the first image signal S1 received by the first receiver 111A and outputs the extracted first image 50a to the image processing unit 130A. Projector 100A also outputs the first image signal S1 received by the first receiver 111A to the first transmitter 115A. The first transmitter 115A transmits the input first image signal S1 to projector 100C.

[0038] Projector 100C receives the first image signal S1 via the first receiver 111C. The first receiver 111C corresponds to the fifth interface. Projector 100C extracts the first image 50a contained in the first image signal S1 received by the first receiver 111C and outputs the extracted first image 50a to the image processing unit 130C. Projector 100C also outputs the first image signal S1 received by the first receiver 111C to the first transmitter 115C. The first transmitter 115C transmits the input first image signal S1 to projector 100B. The first transmitter 115C corresponds to the sixth interface.

[0039] The projector 100B receives the first image signal S1 via the second receiver 113B. The projector 100B extracts the first image 50a contained in the first image signal S1 received by the second receiver 113B and outputs the extracted first image 50a to the image processing unit 130B.

[0040] Next, we will explain the daisy-chain connection of the second system. The first transmitter 115B of projector 100B and the first receiver 111D of projector 100D are connected by an HDMI cable 213. The first transmitter 115D of projector 100D and the second receiver 113A of projector 100A are connected by an HDMI cable 215.

[0041] Projector 100B extracts the second image 50b contained in the second image signal S2 received by the first receiver 111B and outputs the extracted second image 50b to the image processing unit 130B. Projector 100B also outputs the second image signal S2 received by the first receiver 111B to the first transmitter 115B. The first transmitter 115B transmits the input second image signal S2 to projector 100D.

[0042] Projector 100D receives the second image signal S2 via the first receiver 111D. The first receiver 111D corresponds to the seventh interface. Projector 100D extracts the second image 50b contained in the second image signal S2 received by the first receiver 111D and outputs the extracted second image 50b to the image processing unit 130D. Projector 100D also outputs the second image signal S2 received by the first receiver 111D to the first transmitter 115D. The first transmitter 115D transmits the input second image signal S2 to projector 100A. The first transmitter 115D corresponds to the eighth interface.

[0043] The projector 100A receives the second image signal S2 via the second receiver 113A. The second receiver 113A corresponds to the second interface. The projector 100A extracts the second image 50b contained in the second image signal S2 received by the second receiver 113A and outputs the extracted second image 50b to the image processing unit 130A.

[0044] Figure 5 shows the first composite image 21A. More specifically, it is a cropped image of the image displayed by the projector 100A from the image displayed on the projection surface 10 shown in Figure 3. The image processing unit 130A of the projector 100A combines at least a portion of the input first image 50a and a portion of the second image 50b to generate a first composite image 21A, and projects image light based on the generated first composite image 21A onto the display area 30A. The image displayed in the display area 30A of the first composite image 21A, excluding the display superimposed area 33, is called the first area 23A. The first area 23A includes at least a portion of the first image 50a. Furthermore, the image displayed in the display superimposition region 33 of the first composite image 21A is called the first superimposition region 25A. The first superimposition region 25A includes the area of ​​the first image 50a excluding the first region 23A, and a part of the second image 50b.

[0045] Figure 6 shows the second composite image 21B. More specifically, it is a cropped image of the image displayed by the projector 100B from the image displayed on the projection surface 10 shown in Figure 3. The image processing unit 130B of the projector 100B combines a portion of the input first image 50a and at least a portion of the second image 50b to generate a second composite image 21B, and projects image light based on the generated second composite image 21B onto the display area 30B. The image displayed in the display area 30B of the second composite image 21B, excluding the display superimposed area 33, is called the second area 23B. The second area 23B includes at least a portion of the second image 50b. Of the second composite image 21B, the image displayed in the display superimposition area 33 is called the second superimposition area 25B. The second superimposition area 25B includes the area of ​​the second image 50b excluding the second area 23B, and a part of the first image 50a.

[0046] Figure 7 shows the image 21C based on the first image 50a displayed by the projector 100C. More specifically, it is a cropped image of the image displayed by the projector 100C from the image displayed on the projection surface 10 shown in Figure 3. The image processing unit 130C of the projector 100C projects the image 21C based on the input first image 50a onto the display area 30C. The image displayed in the display area 30C of image 21C, excluding the display superimposed area 31, is called the third superimposed area 23C. The image displayed in the display superimposed area 33 of image 21C is called the third superimposed area 25C.

[0047] Figure 8 shows image 21D based on the second image 50b displayed by projector 100D. More specifically, it is a cropped image of the image displayed by projector 100D from the image displayed on the projection surface 10 shown in Figure 3. The image processing unit 130D of the projector 100D projects the image 21D based on the input second image 50b onto the display area 30D. The image displayed in the area of ​​image 21D excluding the display superimposition area 35 is called the fourth superimposition area 23D. The image displayed in the display superimposition area 35 of image 21D is called the fourth superimposition area 25D.

[0048] The display superimposed area 33 displays the first superimposed area 25A of the first composite image 21A and the second superimposed area 25B of the second composite image 21B superimposed. In the display superimposed area 31, a portion of the first area 23A of the first composite image 21A and the third superimposed area 25C of image 21C are superimposed and displayed. In the display superimposed area 35, a portion of the second area 23B of the second composite image 21B and the fourth superimposed area 25D of image 21D are superimposed and displayed.

[0049] 5. Projector Operation Next, we will explain how Projector 100 works. Figure 9 is a flowchart showing the operation of projector 100A. Since the operation of projectors 100A, 100B, 100C, and 100D is largely the same, this section will explain the operation of projector 100A. Projector 100 displays an OSD (On-Screen Display) screen on the projection surface 10 as a pre-configuration step, allowing the user to set the placement of Projector 100 and the start and end positions of the edge blending area. The user inputs these settings by operating the remote control 5 while viewing the OSD screen. Projector 100 generates configuration information, including the placement of Projector 100 and the start and end positions of the edge blending process, according to the input from the remote control 5.

[0050] This setting may be performed on each of the projectors 100A, 100B, 100C, and 100D. Alternatively, it may be performed on one of the projectors 100 connected to the first daisy-chain connection and on one of the projectors 100 connected to the second daisy-chain connection. A projector 100 that receives the setting transmits the setting information to the other projectors 100 connected in the daisy-chain. Alternatively, the image supply device 300, which is a personal computer, may generate the setting information and transmit the generated setting information to each projector 100.

[0051] First, the control unit 150A determines whether or not it has received a request to transmit an image signal from the image supply device 300 (step S1). If the control unit 150 has not received a request to transmit an image signal (step S1 / NO), it waits until it receives a request to transmit an image signal (step S1).

[0052] When the control unit 150A receives a request to transmit an image signal (step S1 / YES), it determines whether or not it has received the image signal. If the control unit 150 has not received the image signal (step S2 / NO), it proceeds to the determination in step S10.

[0053] When the control unit 150A receives an image signal (step S2 / YES), it determines whether there is a downstream projector 100 daisy-chained to projector 100A (step S3). As the first daisy-chained system, projector 100C is connected downstream of projector 100A. If there is a downstream projector 100 daisy-chained (step S3 / YES), the control unit 150 transmits the received image signal to the downstream projector 100 (step S4).

[0054] Furthermore, if there is no downstream projector 100 (step S3 / NO), or if an image signal is transmitted to the downstream projector 100 (step S4), the control unit 150 causes the image I / F 110A to extract the image contained in the image signal (step S5). When the image I / F 110A receives the first image signal S1, it extracts the first image 50a contained in the received first image signal S1 and outputs the extracted first image 50a to the image processing unit 130A. Also, when the image I / F 110A receives the second image signal S2, it extracts the second image 50b contained in the received second image signal S2 and outputs the extracted second image 50b to the image processing unit 130A.

[0055] The image processing unit 130A expands the first image 50a input from the image I / F 110A into the first bank of the frame memory 135A, and expands the input second image 50b into the second bank of the frame memory 135A (step S5).

[0056] The image processing unit 130A reads the first image 50a from the first bank and expands the read first image 50a into the third bank according to the setting information. Similarly, the image processing unit 130A reads the second image 50b from the second bank and expands the read second image 50b into the third bank according to the setting information. As a result, the first composite image 21A projected by the projector 100A is generated in the third bank of the frame memory 135A (step S6).

[0057] Furthermore, the image processing unit 130A performs a dimming process to adjust the brightness of the first composite image 21A deployed in the third bank, thereby reducing the brightness difference in the display superposition area 31 where the image displayed by projector 100C and the image displayed by projector 100A overlap (step S7). Similarly, the image processing unit 130A performs a dimming process to adjust the brightness of the first composite image 21A, thereby reducing the brightness difference in the display superposition area 33 where the image displayed by projector 100A and the image displayed by projector 100B overlap (step S7).

[0058] Next, the image processing unit 130A reads the first composite image 21A, which has undergone light reduction processing, from the frame memory 135A and outputs the read first composite image 21A to the optical modulator 143A. The optical modulator 143A applies a drive voltage corresponding to the input first composite image 21A to each pixel of the liquid crystal panel 145A, changing the light transmittance of each pixel to the transmittance corresponding to the first composite image 21A. As light emitted from the light source 141A passes through the liquid crystal panel 145A, image light corresponding to the first composite image 21A is generated (step S8). The image light generated by the optical modulator 143A is magnified and projected onto the projection surface 10 by the optical unit 147A. As a result, the first composite image 21A is displayed on the projection surface 10 (step S9).

[0059] Subsequently, the control unit 150A returns to the determination in step S2. If the control unit 150 has not received an image signal (step S2 / NO), it determines whether or not the reception of the image signal has finished (step S10). If the control unit 150 has not finished receiving the image signal (step S10 / NO), it returns to the determination in step S2. Furthermore, the control unit 150A terminates this processing flow when it has finished receiving the image signal (step S10 / YES).

[0060] 6. Other projector connections Figure 10 shows an example of a connection configuration when six projectors 100A, 100B, 100C, 100D, 100E, and 100F are connected to the image supply device 300. Figure 10 shows six projectors 100, 100C, 100A, 100B, 100D, 100E, and 100F, arranged in a single row along the horizontal direction of the projection surface 10. Due to the limitations of the drawing, projectors 100C, 100A, and 100B are shown in two separate rows, and projectors 100D, 100E, and 100F are shown in two separate rows. Also due to the limitations of the drawing, the entire image supply device 300 is not shown, and only the first transmitter 310, the second transmitter 330, and the third transmitter 350 are shown.

[0061] Figure 11 shows the state in which three images, the first image 50a, the second image 50b, and the third image 50c, are displayed on the projection surface 10. The first image 50a, the second image 50b, and the third image 50c are images output by the image supply device 300 as a multi-display screen, that is, as three screens combined into a single continuous screen.

[0062] The first image 50a is displayed in display area 30C, display area 30A, and display area 30B. The first image signal S1, which includes the first image 50a, needs to be supplied to projectors 100A, 100B, and 100C.

[0063] The second image 50b is displayed in display areas 30A, 30B, 30D, and 30E. Display area 30E is the area onto which the image light projected by projector 100E is projected. In the drawing view, projector 100E is positioned to the right of projector 100D. It is necessary to supply the second image signal S2, which includes the second image 50b, to projectors 100A, 100B, 100D, and 100E.

[0064] The third image 50c is displayed in display area 30D, display area 30E, and display area 30F. Display area 30F is the area onto which the image light projected by projector 100F is projected. In the drawing view, projector 100F is positioned to the right of projector 100E. Therefore, it is necessary to supply the third image signal S3, which includes the third image 50c, to projectors 100D, 100E, and 100F.

[0065] When three images, a first image 50a, a second image 50b, and a third image 50c, are displayed on the projection surface 10, the display superposition areas include display superposition areas 31, 33, and 35, as well as display superposition areas 37 and 39. In the drawing, the area where the right edge of display area 30D and the left edge of display area 30E overlap is called the display superposition area 37. Also, in the drawing, the area where the right edge of display area 30E and the left edge of display area 30F overlap is called the display superposition area 39.

[0066] The image supply device 300 includes a first transmitting unit 310 and a second transmitting unit 330, as well as a third transmitting unit 350. The first transmitter 310 is connected to the first receiver 111A of the projector 100A by an HDMI cable 201. The image supply device 300 transmits a first image signal S1, including the first image 50a, from the first transmitter 310 to the projector 100A. The second transmitter 330 is connected to the first receiver 111B of the projector 100B via an HDMI cable 211. The image supply device 300 transmits a second image signal S2, including the second image 50b, from the second transmitter 330 to the projector 100B. The third transmitter 350 is connected to the first receiver 111E of the projector 100E by an HDMI cable 221. The image supply device 300 transmits a third image signal S3, including the third image 50c, from the third transmitter 350 to the projector 100E.

[0067] Projectors 100A, 100B, 100C, 100D, 100E, and 100F are connected by three daisy-chain connections. The first daisy-chain connection connects projector 100A, projector 100C, and projector 100B. The second daisy-chain connection connects projector 100B, projector 100D, projector 100E, and projector 100A. The third daisy-chain connection connects projector 100E, projector 100F, and projector 100D.

[0068] S1 shown in Figure 10 represents the first image signal S1, S2 shown in Figure 10 represents the second image signal S2, and S3 shown in Figure 10 represents the third image signal S3.

[0069] First, let's explain the daisy-chain connection of the first system. The first transmitter 115A of projector 100A and the first receiver 111C of projector 100C are connected by an HDMI cable 203. The first transmitter 115C of projector 100C and the second receiver 113B of projector 100B are connected by an HDMI cable 205.

[0070] Projector 100A extracts the first image 50a contained in the first image signal S1 received by the first receiver 111A and outputs the extracted first image 50a to the image processing unit 130A. Projector 100A also outputs the first image signal S1 received by the first receiver 111A to the first transmitter 115A. The first transmitter 115A transmits the input first image signal S1 to projector 100C.

[0071] Projector 100C receives the first image signal S1 via the first receiver 111C. Projector 100C extracts the first image 50a contained in the first image signal S1 received by the first receiver 111C and outputs the extracted first image 50a to the image processing unit 130C. Projector 100C also outputs the first image signal S1 received by the first receiver 111C to the first transmitter 115C. The first transmitter 115C transmits the input first image signal S1 to projector 100B.

[0072] The projector 100B receives the first image signal S1 via the second receiver 113B. The second receiver 113B corresponds to the fourth interface. The projector 100B extracts the first image 50a contained in the first image signal S1 received by the second receiver 113B and outputs the extracted first image 50a to the image processing unit 130B.

[0073] Next, we will explain the daisy-chain connection of the second system. The first transmitter 115B of projector 100B and the first receiver 111D of projector 100D are connected by an HDMI cable 213. The first transmitter 115D of projector 100D and the second receiver 113E of projector 100E are connected by an HDMI cable 215. The second transmitter 117E of projector 100E and the second receiver 113A of projector 100A are connected by an HDMI cable 217.

[0074] Projector 100B extracts the second image 50b contained in the second image signal S2 received by the first receiver 111B and outputs the extracted second image 50b to the image processing unit 130B. Projector 100B also outputs the second image signal S2 received by the first receiver 111B to the first transmitter 115B. The first transmitter 115B transmits the input second image signal S2 to projector 100D.

[0075] The projector 100D receives the second image signal S2 via the first receiver 111D. The projector 100D extracts the second image 50b contained in the second image signal S2 received by the first receiver 111D and outputs the extracted second image 50b to the image processing unit 130D. The projector 100D also outputs the second image signal S2 received by the first receiver 111D to the first transmitter 115D. The first transmitter 115D transmits the input second image signal S2 to the projector 100E.

[0076] The projector 100E receives the second image signal S2 via the second receiver 113E. The projector 100E extracts the second image 50b contained in the second image signal S2 received by the second receiver 113E and outputs the extracted second image 50b to the image processing unit 130E. The projector 100E also outputs the second image signal S2 received by the second receiver 113E to the second transmitter 117E. The second transmitter 117E transmits the input second image signal S2 to the projector 100A.

[0077] The projector 100A receives the second image signal S2 via the second receiver 113A. The projector 100A extracts the second image 50b contained in the second image signal S2 received by the second receiver 113A and outputs the extracted second image 50b to the image processing unit 130A.

[0078] Next, we will explain the daisy-chain connection of the third system. The first transmitter 115E of projector 100E and the first receiver 111F of projector 100F are connected by an HDMI cable 223. The first transmitter 115F of projector 100F and the second receiver 113D of projector 100D are connected by an HDMI cable 225.

[0079] Projector 100E extracts the third image 50c contained in the third image signal S3 received by the first receiver 111E and outputs the extracted third image 50c to the image processing unit 130E. Projector 100E also outputs the third image signal S3 received by the first receiver 111E to the first transmitter 115E. The first transmitter 115E transmits the input third image signal S3 to projector 100F.

[0080] Projector 100F receives the third image signal S3 via the first receiver 111F. Projector 100F extracts the third image 50c contained in the third image signal S3 received by the first receiver 111F and outputs the extracted third image 50c to the image processing unit 130F. Projector 100F also outputs the third image signal S3 received by the first receiver 111F to the first transmitter 115F. The first transmitter 115F transmits the input third image signal S3 to projector 100D.

[0081] The projector 100D receives the third image signal S3 via the second receiver 113D. The projector 100D extracts the third image 50c contained in the third image signal S3 received by the second receiver 113D, and outputs the extracted third image 50c to the image processing unit 130D for image processing.

[0082] 7. Effects of the display system control method As described above, this embodiment discloses a control method for the display system 1. The projector 100A receives the first image 50a using the first receiving unit 111A provided in the projector 100A. The projector 100A receives the second image 50b using the second receiving unit 113A provided in the projector 100A. The projector 100A generates a first composite image 21A that includes parts of the first image 50a and the second image 50b. The projector 100A displays the first composite image 21A on the projection surface 10. The projector 100B receives the second image 50b using the first receiving unit 111B provided in the projector 100B. Projector 100B displays the second image 50b on the projection surface 10. The first composite image 21A includes a first region 23A, which is part of the first composite image 21A, and a first superimposed region 25A, which is a different portion of the first composite image 21A from the first region 23A and includes part of the second image 50b. The second image 50b includes a portion of the second image 50b and, on the projection surface 10, includes a second superimposed region 25B that is superimposed with the first superimposed region 25A, and a second region 23B that is a portion different from the second superimposed region 25B.

[0083] As a result, projector 100A receives the first image 50a and the second image 50b and displays a first composite image 21A, which is a combination of either the first image 50a or the second image 50b, on the projection surface 10. Projector 100B receives the second image 50b and displays the second image 50b on the projection surface 10. Therefore, projectors 100A and 100B can achieve large-screen display using larger images than when using either the first image 50a or the second image 50b alone.

[0084] The projector 100B receives the first image 50a using the second receiving unit 113B provided by the projector 100B. The projector 100B generates a second composite image 21B based on the first image 50a and the second image 50b. The projector 100B displays the generated second composite image 21B on the projection surface 10. Displaying the second composite image 21B is equivalent to displaying the second image 50b as part of the second composite image 21B. The first superimposed region 25A includes a portion of the first image 50a and a portion of the second image 50b. The second superimposed region 25B includes a portion of the first image 50a and a portion of the second image 50b.

[0085] As a result, the projector 100B receives the first image 50a and the second image 50b, and displays a second composite image 21B, which is a combination of the first image 50a or the second image 50b, on the projection surface 10. In addition, the images displayed in the first superimposition area 25A and the second superimposition area 25B can be images that include a part of the first image 50a and a part of the second image 50b.

[0086] Projector 100A applies edge blending to the first superimposed area 25A, and projector 100B applies edge blending to the second superimposed area 25B.

[0087] This makes it possible to display images with edge blending applied in the first superimposed area 25A and the second superimposed area 25B, thereby suppressing the degradation of image quality in the display superimposed areas 31, 33, and 35.

[0088] Projector 100A transmits the first image 50a to projector 100C. Projector 100B transmits the second image 50b to projector 100D. Projector 100C receives the first image 50a transmitted by projector 100A using the first receiving unit 111C provided in projector 100C. Projector 100C transmits the first image 50a to Projector 100B using the first transmitting unit 115C provided in Projector 100C. The projector 100C displays an image based on the first image 50a on the projection surface 10. Projector 100D receives the second image 50b transmitted by projector 100B using the first receiving unit 111D provided in projector 100D. Projector 100D transmits the second image 50b to projector 100A using the first transmitter 115D provided in projector 100D. Projector 100D displays an image based on the second image 50b on the projection surface 10. Receiving the second image 50b by the second receiver 113A of projector 100A is equivalent to receiving the second image 50b transmitted by the first transmitter 115D of projector 100D. The reception of the first image 50a by the second receiver 113B of the projector 100B is equivalent to receiving the first image 50a transmitted by the first transmitter 115C of the projector 100C.

[0089] This allows projectors 100A, 100B, 100C, and 100D to display a single large image on the projection surface 10.

[0090] The image 21C based on the first image 50a includes a third superimposed region 25C that is superimposed on a part of the first region 23A of the first composite image 21A on the projection surface 10, and a third region 23C which is a part of the image 21C based on the first image 50a that is different from the third superimposed region 25C. The image 21D based on the second image 50b includes a fourth superimposed region 25D that is superimposed on a part of the second region 23B of the second composite image 21B on the projection surface 10, and a fourth region 23D which is a part of the image 21D based on the second image 50b that is different from the fourth superimposed region 25D.

[0091] As a result, an image 21C based on the first image 50a displayed on the projection surface 10 can be displayed, which includes the third superimposed region 25C and the third region 23C. Additionally, an image 21D based on the second image 50b displayed on the projection surface 10 can be displayed, which includes the fourth superimposed region 25D and the fourth region 23D.

[0092] 8. Effects of the control method for the display device The projector 100A receives the first image 50a using the first receiving unit 111A provided in the projector 100A. The projector 100A receives the second image 50b using the second receiving unit 113A provided in the projector 100A. The projector 100A generates a first composite image 21A which includes a portion of the first image 50a and the second image 50b. Projector 100A displays the first composite image 21A on the projection surface 10. The first composite image 21A includes a first region 23A, which is part of the first composite image 21A, and a first superimposed region 25A, which is a different portion of the first composite image 21A from the first region 23A and includes part of the second image 50b. In the projection surface 10, a portion of the second image 50b is displayed by another projector 100 in the area where the first superimposed area 25A is displayed.

[0093] As a result, the projector 100A receives the first image 50a and the second image 50b via the receiving units 111A and 113A to generate the first composite image 21A. Therefore, the projector 100A can receive the first image 50a and the second image 50b in sizes that can be received by the receiving units 111A and 113A, combine the first image 50a or the second image 50b, and display the combined first composite image 21A on the projection surface 10.

[0094] Furthermore, since the projector 100A receives the first image 50a and the second image 50b, it can display an image with edge blending processing applied in the display superimposed area 33, thereby suppressing a decrease in image quality in the display superimposed area 33.

[0095] 9. Effects of the display device The projector 100A comprises a first receiving unit 111A, a second receiving unit 113A, and a control unit 150A. The first receiving unit 111A receives the first image 50a. The second receiving unit 113A receives the second image 50b. The control unit 150A generates a first composite image 21A which includes the first image 50a and a part of the second image 50b. The control unit 150A displays the first composite image 21A on the projection surface 10. The first composite image 21A includes a first region 23A, which is part of the first composite image 21A, and a first superimposed region 25A, which is a different portion of the first composite image 21A from the first region 23A and includes part of the second image 50b. In the projection surface 10, a portion of the second image 50b is displayed by another projector 100 in the area where the first superimposed area 25A is displayed.

[0096] As a result, the projector 100A receives the first image 50a and the second image 50b via the receiving units 111A and 113A. Therefore, the projector 100A receives the first image 50a and the second image 50b, which are of a size that can be received by the receiving units 111A and 113A, and combines them into an image larger than either the first image 50a or the second image 50b, and displays the combined image on the projection surface 10.

[0097] Furthermore, since the projector 100A receives the first image 50a and the second image 50b, it can display an image with edge blending processing applied in the display superimposed area 33, thereby suppressing a decrease in image quality in the display superimposed area 33.

[0098] The embodiments described above are preferred embodiments of the present invention. However, the invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, a cable compatible with standards such as USB (Universal Serial Bus) or DisplayPort may be used as the image transmission cable connecting the image supply device 300 and the projector 100.

[0099] Furthermore, the functional components of the projector 100 shown in Figure 2 represent a functional configuration, and the specific implementation form is not particularly limited. In other words, it is not necessarily required that hardware corresponding to each functional component be implemented individually, and it is certainly possible to have a configuration in which a single processor executes a program to realize the functions of multiple functional components. Also, some of the functions realized by software in the above embodiment may be realized by hardware, and some of the functions realized by hardware may be realized by software. In addition, the specific detailed configuration of other parts of the projector can also be arbitrarily changed without departing from the spirit of the present invention.

[0100] Furthermore, the processing units in the flowchart shown in Figure 9 are divided according to their main processing content in order to facilitate understanding of the processing of the projector 100A. The present invention is not limited by the way the processing units are divided or named as shown in the flowchart in Figure 9. In addition, the processing of the control unit 150 can be further divided into more processing units depending on the processing content, or it can be divided so that one processing unit includes even more processing. Also, the processing order in the flowchart above is not limited to the example shown.

[0101] Furthermore, when the control method for the display system and the control method for the display device are implemented using a computer provided in the projector 100, the program to be executed by this computer can be configured as a recording medium or a transmission medium for transmitting this program. Magnetic, optical, or semiconductor memory devices can be used as the recording medium. Specifically, portable or fixed recording media such as flexible disks, HDDs (Hard Disk Drives), CD-ROMs, DVDs, Blu-ray Discs, magneto-optical disks, flash memory, and card-type recording media can be used. Alternatively, the above-mentioned recording media may be non-volatile storage devices such as RAM, ROM, and HDDs, which are internal storage devices provided in server equipment. Blu-ray is a registered trademark. [Explanation of Symbols]

[0102] 1…Display system, 5…Remote control, 10…Projection surface, 31, 33, 35, 37, 39…Display superimposition area, 50a…First image, 50b…Second image, 50c…Third image, 100, 100A, 100B, 100C, 100D, 100E, 100F…Projector, 110A, 110B, 110C, 110D…Image I / F, 111A, 111B, 111C, 111D, 111E, 111F...First receiving section, 113A, 113B, 113C, 113D, 113E, 113F...Second receiving section, 115A, 115B, 115C, 115D, 115E, 115F...First transmitting section, 117A, 117B, 117C, 117D, 117E ,117F...Second transmitter, 120A...Remote control receiver, 130, 130A, 130B, 130C, 130D, 130E, 130F...Image processing unit, 135A...Frame memory, 140A...Image projection unit, 141, 141A...Light source, 143, 143A...Optical modulator, 145A...Liquid crystal panel, 147A...Optical unit, 150A...Control unit, 160A...Storage unit, 165A...Control program, 170A...Processor, 201, 203, 205, 211, 213, 215, 217, 221, 223, 225...HDMI cable, 300...Image supply device, 310...First transmitter, 330...Second transmitter, 350...Third transmitter.

Claims

1. 1. A method for controlling a display system, comprising: The first display device is receiving a first image through a first interface of the first display device; receiving a second image via a second interface of the first display device; generating a first composite image including the first image and a portion of the second image; displaying the first composite image on a display surface; Run The second display device is receiving the second image through a third interface included in the second display device; displaying the second image on the display surface; Run The first composite image is a first region that is a part of the first composite image; a first superimposed area that is a portion of the first composite image different from the first area and includes a part of the second image; The second image is a second overlapping area including a portion of the second image and overlapping the first overlapping area on the display surface; a second region that is a portion different from the second superimposed region of the second image, A method for controlling a display system.

2. The second display device is receiving the first image through a fourth interface of the second display device; generating a second composite image based on the second image and the first image; displaying the second composite image; Run displaying the second image includes displaying the second image as part of the second composite image; the first superimposed area includes a portion of the first image and a portion of the second image; the second overlapping region includes a portion of the first image and a portion of the second image; A method for controlling a display system according to claim 1.

3. the first display device performs edge blending on the first overlapping area; the second display device performs edge blending on the second overlapping area; A method for controlling a display system according to claim 1 or 2.

4. the first display device transmits the first image to a third display device; the second display device transmits the second image to a fourth display device; The third display device is receiving the first image transmitted by the first display device via a fifth interface included in the third display device; transmitting the first image to the second display device through a sixth interface included in the third display device; displaying an image based on the first image on the display surface; Run The fourth display device is receiving the second image transmitted by the second display device via a seventh interface included in the fourth display device; transmitting the second image to the first display device via an eighth interface of the fourth display device; displaying an image based on the second image on the display surface; Run receiving the second image through the second interface of the first display device means receiving the second image transmitted through the eighth interface of the fourth display device; receiving the first image through a fourth interface included in the second display device is receiving the first image transmitted through the sixth interface included in the third display device; A method for controlling a display system according to claim 2.

5. An image based on the first image is a third overlapping area that overlaps a portion of the first area of ​​the first composite image on the display surface; a third region that is a portion of an image based on the first image that is different from the third superimposed region, An image based on the second image is a fourth overlapping area that overlaps the portion of the second area of ​​the second composite image on the display surface; a fourth region that is a portion of an image based on the second image that is different from the fourth superimposed region, A method for controlling a display system according to claim 2 or 4.

6. receiving a first image via a first interface of the display device; receiving a second image via a second interface of the display device; generating a first composite image including the first image and a portion of the second image; displaying the first composite image on a display surface; The first composite image is a first region that is a part of the first composite image; a first superimposed area that is a portion of the first composite image different from the first area and includes a part of the second image; a part of the second image is displayed by another display device in an area of ​​the display surface where the first overlapping area is displayed; A method for controlling a display device.

7. a first interface for receiving a first image; a second interface for receiving a second image; generating a first composite image including the first image and a portion of the second image; a control unit that executes the first composite image being displayed on a display surface; Equipped with The first composite image is a first region that is a part of the first composite image; a first superimposed area that is a portion of the first composite image different from the first area and includes a part of the second image; a part of the second image is displayed by another display device in an area of ​​the display surface where the first overlapping area is displayed; Display device.

Images