Connection status detection method, display system, and display device

Abstract

To provide a connection status detection method, a display system, and a display device that improve the ease of checking the connection between an image output device and a display device, thereby improving user convenience.SOLUTION: A connection status detection method includes, when a connection confirmation signal from an information processing device 100 connected to a projector 200 having a first I / F 210A and a second I / F 210B is received via a preset interface out of the first I / F 210A and the second I / F 210B, transmitting a first response signal from the preset interface.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a connection status detection method, a display system, and a display device. [Background technology]

[0002] Conventionally, a display device is capable of connecting image output devices to a plurality of interfaces provided in the display device.

[0003] For example, Patent Document 1 discloses an image display device that includes an image generation unit that generates an image, a first image signal input unit, a second image signal input unit, and a control unit that controls the image generation unit based on a video signal from the first image signal input unit or the second image signal input unit. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-75716 Summary of the Invention [Problem to be solved by the invention]

[0005] In the system configuration of Patent Document 1, for example, if the correspondence between the interface provided on the display device and the image output device connected to this interface is set in advance, there is a possibility that the image output device will be connected to the display device incorrectly. [Means for solving the problem]

[0006] The present disclosure is a connection status detection method that includes, when a connection confirmation signal from an image output device connected to a display device having a first interface and a second interface is received via a predetermined interface from among the first interface and the second interface, transmitting a first response signal from the predetermined interface.

[0007] The present disclosure is a display system that includes a display device having a first interface and a second interface, and a first image output device connected to the display device and transmitting a connection confirmation signal to the display device, wherein the display device transmits a first response signal from a predetermined interface out of the first interface and the second interface when the display device receives the connection confirmation signal through the predetermined interface.

[0008] The present disclosure relates to a display device that includes a first interface, a second interface, and at least one processor, wherein the at least one processor transmits a first response signal via a predetermined interface out of the first interface and the second interface when the processor receives a connection confirmation signal via the predetermined interface. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing the system configuration of a display system. [Figure 2] FIG. 1 is a block diagram showing the configuration of an information processing device. [Figure 3] FIG. 1 is a block diagram showing the configuration of a projector. [Figure 4] FIG. 4 is a diagram showing an example of a guidance display displayed on a display unit. [Figure 5] FIG. 4 is a diagram showing an example of a guidance display displayed on a display unit. [Figure 6] 4 is a flowchart showing the operation of the information processing apparatus according to the first embodiment. [Figure 7] 6 is a flowchart showing the operation of the projector according to the first embodiment. [Figure 8] 10 is a flowchart showing the operation of a projector according to a second embodiment. [Figure 9] 10 is a flowchart showing the operation of an information processing apparatus according to a third embodiment. [Figure 10] FIG. 4 is a diagram showing an example of a guidance display displayed on a projection surface. [Figure 11]FIG. 4 is a diagram showing an example of a guidance display displayed on a projection surface. DETAILED DESCRIPTION OF THE INVENTION

[0010] [1. System Configuration of First Embodiment] Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a diagram showing the system configuration of a display system 1. As shown in FIG. The display system 1 includes an information processing device 100 and a projector 200. The information processing device 100 corresponds to an image output device, and the projector 200 corresponds to a display device.

[0011] FIG. 1 shows a case where the display system 1 includes two information processing devices 100A and 100B, but the number of information processing devices 100 included in the display system 1 is arbitrary, and may be one, or three or more. FIG. 1 also shows a case where the display system 1 includes one projector 200, but the number of projectors 200 included in the display system 1 is arbitrary, and may be two or more. FIG. 1 also shows a case where two information processing devices 100A and 100B are connected to the projector 200, but the number of information processing devices 100 connected to the projector 200 is also arbitrary. Hereinafter, the information processing devices 100A and 100B will be collectively referred to as the information processing device 100. The information processing device 100A corresponds to an image output device and a first image output device, and the information processing device 100B corresponds to an image output device and a second image output device.

[0012] The information processing device 100A is connected to the projector 200 by a cable 50A, and the information processing device 100B is connected to the projector 200 by a cable 50B. In this embodiment, a case will be described in which the cables 50A and 50B are HDMI (High-Definition Multimedia Interface) cables. HDMI is a registered trademark.

[0013] The information processing device 100 supplies image data to the projector 200. The image data supplied by the information processing device 100 may be a moving image or a still image. The information processing device 100 may be, for example, a personal computer such as a desktop computer, a notebook computer, or a tablet computer. Alternatively, the information processing device 100 may be a mobile terminal such as a smartphone.

[0014] The projector 200 generates image light based on image data supplied from the information processing device 100, and enlarges and projects the generated image light onto the projection surface 10. As a result, an image corresponding to the image light is displayed on the projection surface 10.

[0015] 2. Configuration of the Information Processing Device of the First Embodiment FIG. 2 is a block diagram showing the configuration of the information processing device 100A. The configuration of information processing device 100A will be described with reference to Fig. 2. Information processing device 100B has substantially the same configuration as information processing device 100A. Therefore, the configuration of information processing device 100A will be described, and a description of the configuration of information processing device 100B will be omitted. Note that the numbers in parentheses in Fig. 2 indicate the numbers of the components provided in information processing device 100B.

[0016] The information processing device 100A includes a processing device I / F 110A, an operation unit 120A, a display unit 130A, and a first control unit 150A. Hereinafter, the interface will also be referred to as I / F.

[0017] The processing device I / F 110A includes communication hardware such as a connector and an interface circuit that conforms to a predetermined communication standard. Under the control of the first control unit 150A, the processing device I / F 110A transmits and receives image data, control data, and the like to and from the projector 200 in accordance with the predetermined communication standard. The processing device I / F 110A can be, for example, an interface capable of digitally transmitting video and audio, such as HDMI, DisplayPort, HDBaseT, USB Type-C, or 3G-SDI (Serial Digital Interface). HDBaseT is a registered trademark. Alternatively, the processing device I / F 110A can be a data communication interface such as USB.

[0018] The operation unit 120A includes input devices such as a mouse and a keyboard, and receives operations from the user.

[0019] The display unit 130A includes a display panel such as a liquid crystal display or an organic EL (Electro-Luminescence) display, and displays an image on the display panel under the control of the first control unit 150A.

[0020] The first control unit 150A is a computer device including a first storage unit 160A and a first processor 170A.

[0021] The first storage unit 160A includes a RAM (Random Access Memory) and a ROM (Read Only Memory). The first storage unit 160A may include an auxiliary storage device such as an SSD (Solid State Drive) or an HDD (Hard Disk Drive).

[0022] The RAM is used for temporary storage of various data, and the ROM stores control programs such as an OS (Operating System) 161A that controls the operation of the information processing device 100A and an application program 163A, as well as various setting information. The application program 163A will be referred to as APP163A below.

[0023] The first processor 170A is an arithmetic processing device configured with a CPU (Central Processing Unit) and an MPU (Micro Processor Unit). The first processor 170A executes the OS 161A and the APP 163A to control each part of the information processing device 100A. The first processor 170A may be configured with a single processor, or may be configured with multiple processors.

[0024] 3. Configuration of the Projector of the First Embodiment FIG. 3 is a block diagram showing the configuration of the projector 200. The configuration of the projector 200 will be described with reference to FIG. The projector 200 includes an operation signal receiving unit 205, a projector I / F 210, an image processing unit 220, a frame memory 225, an image projection unit 230, and a second control unit 250.

[0025] The operation signal receiving unit 205 is an infrared signal receiving device and includes a light receiving element, a decoder, etc. (not shown). The operation signal receiving unit 205 receives and decodes an infrared signal transmitted from the remote control 201. The operation signal receiving unit 205 decodes the infrared signal and outputs an operation signal corresponding to an operated operation key or button on the remote control 201 to the second control unit 250. The operation signal receiving unit 205 may receive a wireless signal such as Bluetooth from the remote control 201. Bluetooth is a registered trademark. When receiving a wireless signal, the operation signal receiving unit 205 may include an antenna and a receiving circuit.

[0026] The remote control 201 has a plurality of operation keys. For example, the remote control 201 has a menu key for displaying a menu for performing various settings, direction keys corresponding to four directions (up, down, left, and right) for selecting an item in the menu, an enter key for confirming an operation, etc. The remote control 201 may be a mobile terminal such as a smartphone. In this case, an interface image of the operation keys is displayed on the touch panel of the mobile terminal by application software installed on the mobile terminal.

[0027] The projector I / F 210 has two interfaces, a first I / F 210A and a second I / F 210B. The first I / F 210A corresponds to the first interface, and the second I / F 210B corresponds to the second interface. The number of interfaces provided in the projector I / F 210 is not limited to two, and may be three or more. Furthermore, when the first I / F 210A and the second I / F 210B are collectively referred to as the projector I / F 210.

[0028] The first I / F 210A and the second I / F 210B include communication hardware such as connectors and interface circuits that comply with a predetermined communication standard. Under the control of the second control unit 250, the first I / F 210A and the second I / F 210B transmit and receive image data, control data, and the like to and from the information processing devices 100A and 100B in accordance with the predetermined communication standard. The first I / F 210A and the second I / F 210B can also use interfaces capable of digitally transmitting video and audio, such as HDMI, DisplayPort, HDBaseT, USB Type-C, and 3G-SDI (Serial Digital Interface). Furthermore, a data communication interface such as USB can be used as the first I / F 210A and the second I / F 210B.

[0029] A frame memory 225 is connected to the image processing unit 220. The frame memory 225 has a plurality of banks. Each bank has a storage capacity capable of writing one frame's worth of display image. The frame memory 225 is configured, for example, with an SDRAM (Synchronous Dynamic RAM). The image processing unit 220 expands image data input from the first I / F 210A or the second I / F 210B in the frame memory 225.

[0030] The image processing unit 220 performs image processing on the image data expanded in the frame memory 225. The image processing performed by the image processing unit 220 includes, for example, resolution conversion processing or resizing processing, distortion correction, shape correction processing, digital zoom processing, and adjustment of image color and brightness. The image processing unit 220 executes processing specified by the second control unit 250, and, if necessary, performs processing using parameters input from the second control unit 250. Of course, the image processing unit 220 can also execute a combination of multiple image processing operations described above.

[0031] The image processing unit 220 and the frame memory 225 are configured, for example, by an integrated circuit. The integrated circuit includes a large scale integration (LSI), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), a system on a chip (SoC), etc. An analog circuit may be included as part of the integrated circuit configuration, or the second control unit 250 may be configured in combination with an integrated circuit.

[0032] The image projection unit 230 includes a light source 231, a light modulation device 233, and an optical unit 235. The light source 231, the light modulation device 233, and the optical unit 235 correspond to an optical device.

[0033] The light source 231 includes a discharge light source lamp such as an extra-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 231 is incident on the light modulation device 233.

[0034] The light modulation device 233 is a light modulation element that modulates the light emitted from the light source 231 and includes a transmissive liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. The liquid crystal panel is not shown. The liquid crystal panel includes a panel region made up of a plurality of pixels arranged in a matrix. The light modulation device 233 applies a drive voltage corresponding to image data input from the image processing unit 220 to each pixel in the panel region, and changes the light transmittance of each pixel to a transmittance corresponding to the display image. The light emitted from the light source 231 is modulated as it passes through the liquid crystal panel, and image light corresponding to the image data is generated.

[0035] The light modulation element provided in the light modulation device 233 is not limited to a transmissive liquid crystal panel, but may be, for example, a reflective liquid crystal panel or a DMD (Digital Micromirror Device).

[0036] The optical unit 235 includes a projection lens (not shown) and projects the image light modulated by the light modulation device 233 onto the projection surface 10 in an enlarged form. As a result, a display image corresponding to the image light is displayed on the projection surface 10.

[0037] The second control unit 250 is a computer device that includes a second storage unit 260 and a second processor 270.

[0038] The second storage unit 260 includes a RAM and a ROM. The RAM is used for temporary storage of various data, etc., and the ROM stores a control program 265 that controls the operation of the projector 200, various setting data, etc.

[0039] The setting data stored in the second storage unit 260 includes settings for the primary I / F and secondary I / F. The primary I / F is an I / F that receives image data with priority. The secondary I / F is an I / F that receives image data in place of the primary I / F when a problem occurs with the primary I / F and the image data can no longer be received. In this embodiment, the explanation will be given assuming that the first I / F 210A is set as the primary I / F and the second I / F 210B is set as the secondary I / F. The first I / F 210A corresponds to a pre-set interface. The primary I / F corresponds to the main interface.

[0040] Furthermore, the user can change the settings of the primary I / F and secondary I / F by operating the remote control 201. For example, when the first I / F 210A is set as the primary I / F, the user can change the primary I / F from the first I / F 210A to the second I / F 210B by operating the remote control 201.

[0041] The setting data stored in the second storage unit 260 also includes a projector ID that uniquely identifies the projector 200. The projector ID may be, for example, the serial number of the projector 200, or may be set by the user operating the remote control 201.

[0042] The second processor 270 is an arithmetic processing device configured with a CPU or MPU. The second processor 270 executes a control program to control each unit of the projector 200. The second processor 270 may be configured with a single processor or multiple processors. The second processor 270 may also be configured with a SoC (System-on-a-Chip) integrated with part or all of the second storage unit 260 or other circuits. The second processor 270 may also be configured with a combination of a CPU that executes a program and a DSP (Digital Signal Processing) that executes predetermined arithmetic processing. Furthermore, all of the functions of the first processors 170A and 170B may be implemented in hardware, or may be configured using a programmable device.

[0043] 4. Operation of the Projector and Information Processing Device of the First Embodiment Next, the operations of the information processing device 100 and the projector 200 will be described. First, a description will be given of the operation of the information processing device 100. Here, the description will be made on the assumption that the information processing devices 100A and 100B are connected to the projector 200 via the cables 50A and 50B.

[0044] It is also assumed that the information processing device 100A is a primary device connected to a first I / F 210A which is a primary I / F of the projector 200. It is also assumed that the information processing device 100B is a secondary device connected to a second I / F 210B which is a secondary I / F of the projector 200.

[0045] The information processing device 100A, which is the primary device, supplies image data to the projector 200 in priority to the information processing device 100B, which is the secondary device. The information processing device 100B, which is the secondary device, supplies image data to the projector 200 when a problem occurs in the information processing device 100A, which is the primary device, and the information processing device 100B is unable to supply image data to the projector 200. In other words, the information processing device 100B, which is the secondary device, functions as a backup device for the information processing device 100A, which is the primary device.

[0046] The primary I / F is an interface for connecting a primary device, and the secondary I / F is an interface for connecting a secondary device. Generally, the primary I / F is a higher performance interface than the secondary I / F. For example, if the primary I / F and secondary I / F are HDMI interfaces, the primary I / F may be HDMI 2.1 version and the secondary I / F may be HDMI 2.0 version.

[0047] When the information processing devices 100A and 100B are connected to the projector I / F 210 of the projector 200, they receive a CEC (Consumer Electronics Control) signal including a projector ID from the projector 200. The information processing devices 100A and 100B can identify the projector 200 to which they are connected, based on the projector ID received from the projector 200.

[0048] When the information processing device 100A set as the primary device receives a CEC signal including a projector ID, the first control unit 150A transmits a CEC request signal including a predetermined CEC command to the projector 200. The predetermined CEC command is, for example, a connection confirmation command that confirms whether the projector I / F 210 of the projector 200 to which the information processing device 100A is connected is the primary I / F. The CEC request signal corresponds to the connection confirmation signal.

[0049] When the second control unit 250 of the projector 200 receives a CEC request signal, it determines whether the projector I / F 210 that received this CEC request signal is the primary I / F. In this embodiment, it is assumed that the first I / F 210A is set as the primary I / F and the second I / F 210B is set as the secondary I / F.

[0050] If the projector I / F 210 that received the CEC request signal is the first I / F 210A, which is the primary I / F, the second control unit 250 transmits a CEC response signal via the first I / F 210A. This CEC response signal includes the projector ID. The CEC response signal corresponds to the first response signal.

[0051] Furthermore, if the projector I / F 210 that received the CEC request signal is the second I / F 210B, which is the secondary I / F, the second control unit 250 prohibits the transmission of a CEC response signal. In other words, the second control unit 250 does not allow the second I / F 210B, which is the secondary I / F, to transmit a CEC response signal.

[0052] When the information processing device 100A receives a CEC response signal from the projector 200, it determines that the information processing device 100A, which is the primary device, is connected to the first I / F 210A, which is the primary I / F. Furthermore, when the information processing device 100A does not receive a CEC response signal from the projector 200, it determines that the information processing device 100A, which is the primary device, is not connected to the first I / F 210A, which is the primary I / F.

[0053] 4 and 5 are diagrams showing examples of guidance displays displayed on the display unit 130A. FIG. 4 shows the guidance display displayed on the display unit 130A when a CEC response signal is received from the projector 200, and FIG. 5 shows the guidance display displayed on the display unit 130A when a CEC response signal is not received from the projector 200.

[0054] 4, when the first control unit 150A receives a CEC response signal from the projector 200, it causes the display unit 130A to display a message indicating that the CEC response signal has been received and the projector ID included in the received CEC signal. By visually checking this display, the user can confirm that the information processing device 100A, which is the primary device, is connected to the primary I / F of the projector 200.

[0055] 5, when the first control unit 150A does not receive a CEC response signal from the projector 200, the first control unit 150A causes the display unit 130A to display a message indicating that the CEC response signal could not be received. By visually checking this display, the user can confirm that the information processing device 100A, which is the primary device, is not connected to the primary I / F of the projector 200.

[0056] FIG. 6 is a flowchart showing the operation of the information processing device 100A. The operation of the information processing device 100A will be described with reference to the flowchart shown in FIG. First, the first control unit 150A determines whether or not a connection to the processing device I / F 110A is detected (step T1). If a connection to the processing device I / F 110A is not detected (step T1 / NO), the first control unit 150A waits until a connection to the processing device I / F 110A is detected.

[0057] When the first control unit 150A detects a connection to the processing device I / F 110A (step T1 / YES), it determines whether or not a CEC signal including a projector ID has been received from the projector 200 (step T2). When the first control unit 150A has not received a CEC signal including a projector ID (step T2 / NO), it waits until it receives a CEC signal including a projector ID.

[0058] When the first control unit 150A receives the CEC signal including the projector ID (step T2 / YES), it transmits a CEC request signal including a connection confirmation command to the projector 200 (step T3).

[0059] Next, the first control unit 150A determines whether or not a CEC response signal has been received from the projector 200 (step T4). If the first control unit 150A receives a CEC response signal from the projector 200 (step T4 / YES), the first control unit 150A causes the display unit 130A to display a message indicating that a CEC response signal has been received and the projector ID (step T5). Furthermore, if the first control unit 150A has not been able to receive a CEC response signal from the projector 200 even after a preset time has elapsed (step T4 / NO), the first control unit 150A causes the display unit 130A to display a message indicating that a CEC response signal has not been received (step T6).

[0060] FIG. 7 is a flowchart showing the operation of the projector 200 of the first embodiment. The operation of the projector 200 will be described with reference to the flowchart shown in FIG. First, the second control unit 250 determines whether or not a connection to the projector I / F 210 has been detected (step S1). If a connection to the projector I / F 210 has not been detected (step S1 / NO), the second control unit 250 waits until a connection to the projector I / F 210 is detected.

[0061] When the second control unit 250 detects a connection to the projector I / F 210 (step S1 / YES), the second control unit 250 transmits a CEC signal including the projector ID via the projector I / F 210 that detected the connection (step S2).

[0062] Next, the second control unit 250 determines whether or not a CEC request signal including a connection check command has been received (step S3). If the second control unit 250 has not received a CEC request signal including a connection check command (step S3 / NO), the second control unit 250 waits until a CEC request signal including a connection check command is received.

[0063] When the second control unit 250 receives a CEC request signal including a connection check command (step S3 / YES), it determines whether the projector I / F 210 that received this CEC request signal is the first I / F 210A (step S4).

[0064] If the projector I / F 210 that received the CEC request signal is not the first I / F 210A (step S4 / NO), the second control unit 250 ends this processing flow without sending a CEC response signal, and returns to the determination in step S1.

[0065] Furthermore, if the projector I / F 210 that received the CEC request signal is the first I / F 210A (step S4 / YES), the second control unit 250 transmits a CEC response signal via the first I / F 210A (step S5). This CEC response signal includes the projector ID.

[0066] 5. Second Embodiment Next, a second embodiment will be described with reference to the accompanying drawings. The configurations of the information processing device 100 and the projector 200 of the second embodiment are the same as the configurations of the information processing device 100 and the projector 200 of the first embodiment shown in Figures 2 and 3, so the same symbols are used for the common components and descriptions of the configurations of the information processing device 100 and the projector 200 are omitted.

[0067] In the first embodiment described above, the second control unit 250 transmitted the CEC response signal via the first I / F 210A only when the projector I / F 210 that received the CEC request signal including the connection check command was the first I / F 210A, which is the primary I / F. The CEC response signal also included the projector ID.

[0068] In this second embodiment, the second control unit 250 also transmits a CEC response signal when the projector I / F 210 that received a CEC request signal including a connection check command is a secondary I / F. Also, in the second embodiment, the information included in the CEC response signal is changed. When the second control unit 250 receives a CEC request signal via the first I / F 210A, it transmits a CEC response signal via the first I / F 210A that includes information indicating that the projector I / F 210 that received this CEC request signal is a primary I / F. This CEC response signal is referred to as a first CEC response signal. Furthermore, when the second control unit 250 receives a CEC request signal via the second I / F 210B, it transmits a CEC response signal via the second I / F 210B, the CEC response signal including information indicating that the projector I / F 210 that received the CEC request signal is a secondary I / F. This CEC response signal is referred to as a second CEC response signal. The second CEC response signal corresponds to the second response signal. That is, the CEC response signal in the second embodiment includes the projector ID and information indicating the projector I / F 210 that received the CEC request signal.

[0069] In the second embodiment, when the second I / F 210B, which is a secondary I / F, receives a CEC request signal in addition to the primary I / F, the second CEC response signal is also transmitted via the second I / F 210B. This makes it possible to determine whether the projector I / F 210 of the projector 200 to which the information processing device 100 is connected is the second I / F 210B.

[0070] FIG. 8 is a flowchart showing the operation of the projector 200 of the second embodiment. The operation of projector 200 will be described with reference to the flowchart shown in Fig. 8. Note that the operations in steps S11 to S14 of the flowchart shown in Fig. 8 are the same as steps S1 to S4 of the flowchart shown in Fig. 7, and therefore description thereof will be omitted.

[0071] The second control unit 250 determines whether the projector I / F 210 that received the CEC request signal including the connection check command is the first I / F 210A (step S14). If the projector I / F 210 that received the CEC request signal is the first I / F 210A (step S14 / YES), the second control unit 250 transmits a first CEC response signal via the first I / F 210A. Furthermore, if the projector I / F 210 that has received the CEC request signal is the second I / F 210B (step S14 / NO), the second control unit 250 transmits a second CEC response signal via the second I / F 210B.

[0072] Although FIG. 2 shows an example in which the information processing device 100A includes one processing device I / F 110A, it is assumed that the information processing device 100A includes two processing device I / Fs 110A, for example. Also, it is assumed that the user mistakenly connects the two processing device I / Fs 110A of the information processing device 100A to the first I / F 210A and the second I / F 210B of the projector 200, respectively.

[0073] The first control unit 150A transmits a CEC request signal via each of the two processing device I / Fs 110A. As a result, the information processing device 100A receives a first CEC response signal and a second CEC response signal from the projector 200. The first control unit 150A displays the projector IDs included in the received first CEC response signal and second CEC response signal on the display unit 130A. This allows the user to recognize that the two processing device I / Fs 110A of the information processing device 100A are connected to the same projector 200.

[0074] 6. Third Embodiment Next, a third embodiment will be described with reference to the accompanying drawings. The configurations of the information processing device 100 and the projector 200 of the third embodiment are the same as the configurations of the information processing device 100 and the projector 200 of the first embodiment shown in Figures 2 and 3, so the same symbols are used for the common components and descriptions of the configurations of the information processing device 100 and the projector 200 are omitted.

[0075] In the third embodiment, when the information processing device 100A, which is the primary device, is unable to receive a CEC response signal from the projector 200, the information processing device 100B, which is the secondary device, transmits a CEC request signal to the projector 200.

[0076] The information processing device 100A, which is the primary device, transmits a CEC request signal to the projector 200 upon receiving a CEC signal including a projector ID from the projector 200. For example, when the information processing device 100B, which is the secondary device, receives a predetermined operation via the operation unit 120B, it transmits a CEC request signal to the projector 200. The predetermined operation is, for example, an operation of a button or the like provided on the operation unit 120B.

[0077] Alternatively, the information processing device 100A and the information processing device 100B may be connected via a network, and the information processing device 100A may notify the information processing device 100B that it was unable to receive a CEC response signal from the projector 200. When the information processing device 100B receives a notification from the projector 200 that it was unable to receive a CEC response signal, the information processing device 100B transmits a CEC request signal to the projector 200.

[0078] Next, the operation of the information processing apparatus 100B of the third embodiment will be described with reference to the flowchart shown in FIG. The operation of the information processing device 100A in the third embodiment is the same as the operation of the information processing device 100A in the first embodiment shown in Fig. 6, and the operation of the projector 200 in the third embodiment is the same as the operation of the projector 200 in the first embodiment shown in Fig. 7. Therefore, a description of the operations of the projector 200 and the information processing device 100A will be omitted.

[0079] The first control unit 150B determines whether a connection to the processing device I / F 110B is detected (step T11). If a connection to the processing device I / F 110B is not detected (step T11 / NO), the first control unit 150B waits until a connection to the processing device I / F 110B is detected.

[0080] When the first control unit 150B detects a connection to the processing device I / F 110B (step T11 / YES), it determines whether or not a CEC signal including a projector ID has been received from the projector (step T12). If the first control unit 150B has not received a CEC signal including a projector ID (step T12 / NO), it waits until it receives a CEC signal including a projector ID.

[0081] When the first control unit 150B receives a CEC signal including the projector ID (step T2 / YES), it determines whether or not a predetermined operation has been received by the operation unit 120B (step T13). If the predetermined operation has not been received (step T13 / NO), the first control unit 150B determines whether or not the time elapsed since receiving the CEC signal in step T12 has exceeded a preset time (step T14).

[0082] If the time elapsed since receiving the CEC signal in step T12 has exceeded the preset time (step T14 / YES), the first control unit 150B ends this processing flow. Furthermore, if the time that has elapsed since the CEC signal was received in step T12 has not yet reached the preset time (step T14 / NO), the first control unit 150B returns to the determination in step T13.

[0083] When the first control unit 150B receives a predetermined operation (step T13 / YES), it transmits a CEC request signal including a connection check command to the projector 200 (step T15).

[0084] Next, the first control unit 150B determines whether or not a CEC response signal has been received from the projector 200 (step T16). If the first control unit 150B receives a CEC response signal from the projector 200 (step T16 / YES), the first control unit 150B causes the display unit 130A to display a message indicating that a CEC response signal has been received and the projector ID (step T17). Furthermore, if the first control unit 150A has not been able to receive a CEC response signal from the projector 200 even after a preset time has elapsed (step T16 / NO), the first control unit 150A causes the display unit 130A to display a message indicating that a CEC response signal has not been received (step T18).

[0085] 7. Fourth Embodiment Next, a fourth embodiment will be described with reference to the accompanying drawings. The configurations of the information processing device 100 and the projector 200 of the fourth embodiment are the same as the configurations of the information processing device 100 and the projector 200 of the first embodiment shown in FIGS. 2 and 3, and therefore detailed description thereof will be omitted.

[0086] In the first to third embodiments described above, when the projector 200 receives a CEC request signal, it transmits a CEC response signal via the projector I / F 210 that received this CEC response signal.

[0087] In the fourth embodiment, the second control unit 250 executes a notification operation when the projector I / F 210 that has received the CEC request signal is not the first I / F 210A that has been set as the primary I / F.

[0088] Examples of the notification operation performed by the projector 200 include sending an email to a preset email address and turning on or blinking an LED lamp or the like provided in the projector 200. Furthermore, if the projector 200 is equipped with a speaker, the notification operation may involve outputting a sound from the speaker notifying of a preset error. Furthermore, the guidance display displayed on the display unit 130A of the information processing device 100A shown in FIGS. 4 and 5 may be displayed on the projection surface 10 by the projector 200. FIG. 10 shows a guidance display displayed on the projection surface 10 when a CEC request signal is received by the first I / F 210A. Furthermore, FIG. 11 shows a guidance display displayed on the projection surface 10 when a CEC request signal is received by the second I / F 210B. The second I / F 210B corresponds to an interface other than the preset interface. Furthermore, the guidance display shown in FIG. 11 corresponds to a preset image.

[0089] In addition, the projector 200 may display whether or not a primary device is connected to the primary I / F by changing the display color of the guidance display displayed on the projection surface 10 or the image itself displayed as the guidance display. For example, if the projector I / F 210 that received the CEC request signal is a primary I / F, the second control unit 250 causes a display image in a first color to be displayed on the projection surface 10. If the projector I / F 210 that received the CEC request signal is a secondary I / F, the second control unit 250 causes a display image in a second color to be displayed on the projection surface 10. The second color is set to a color different from the first color.

[0090] 8. Other Embodiments The above-described embodiment is a preferred embodiment of the present invention, but the present invention is not limited to the above-described embodiment and various modifications are possible within the scope of the gist of the present invention. For example, in the above-described first, second and third embodiments, the projector 200 is used as an example of the display device, but the display device may be a flat panel display.

[0091] 7, when projector 200 detects a connection to projector I / F 210 in step S1, projector 200 transmits a CEC signal including a projector ID to projector I / F 210 that detected the connection in step S2. However, projector 200 may not transmit a CEC signal including a projector ID, but may transmit a CEC signal including a projector ID in step S5 and then display this projector ID on projection surface 10. The user can confirm the projector 200 to which information processing device 100A is connected by comparing the projector ID displayed on display unit 130A of information processing device 100A with the projector ID displayed on projection surface 10.

[0092] For example, the configuration of the information processing device 100A shown in FIG. 2 and the configuration of the projector 200 shown in FIG. 3 show functional configurations, and the specific implementation form is not particularly limited. In other words, it is not necessarily necessary to implement hardware corresponding to each functional unit individually, and it is of course possible to configure the devices so that a single processor executes a program to realize the functions of multiple functional units. Furthermore, some of the functions realized by software in the above embodiments may be realized by hardware, and some of the functions realized by hardware may be realized by software. In addition, the specific detailed configurations of the other units of the information processing device 100 and the projector 200 may also be changed as desired without departing from the spirit of the present invention.

[0093] 6 and 9 are divided according to the main processing content in order to facilitate understanding of the processing of the information processing device 100. The present invention is not limited by the manner in which the processing units are divided or the names of the processing units shown in the flowcharts of FIGS. 6 and 9. Furthermore, the processing of the first control unit 150 can be divided into more processing units according to the processing content, or can be divided so that one processing unit includes more processes. Furthermore, the processing order of the above flowcharts is not limited to the example shown in the drawings.

[0094] Similarly, the processing units in the flowcharts shown in Figures 7 and 8 are divided according to the main processing content in order to make the processing of projector 200 easier to understand. The present invention is not limited to the manner in which the processing units are divided or the names of the processing units shown in the flowcharts of Figures 7 and 8. Furthermore, the processing of second control unit 250 can be divided into more processing units according to the processing content, or can be divided so that one processing unit includes more processes. Furthermore, the processing order of the above flowcharts is not limited to the example shown in the figures.

[0095] Furthermore, when the connection status detection method is implemented using computers included in the information processing device 100 and the projector 200, the program executed by these computers can be configured in the form of a recording medium. Alternatively, the program can be configured in the form of a transmission medium for transmitting the program executed by these computers. The recording medium can be a magnetic or optical recording medium or a semiconductor memory device. Specific examples include portable or fixed recording media such as flexible disks, HDDs, CD-ROMs, DVDs (Digital Versatile Discs), Blu-ray Discs, magneto-optical discs, flash memories, and card-type recording media. The recording medium can also be a non-volatile storage device such as RAM, ROM, or HDD, which is an internal storage device included in the server device. Blu-ray is a registered trademark.

[0096] 9. Summary of the Disclosure A summary of this disclosure is provided below.

[0097] (Appendix 1) A connection status detection method comprising: when a connection confirmation signal from an image output device connected to a display device having a first interface and a second interface is received via a predetermined interface out of the first interface and the second interface, transmitting a first response signal from the predetermined interface.

[0098] As a result, if the interface that receives the connection confirmation signal from the image output device is a preset interface, the display device transmits a first response signal via the preset interface. This allows the image output device to determine whether the interface of the display device to which the image output device is connected is a preset interface. This reduces the workload of confirming the connection between the image output device and the display device, and makes the connection process between the image output device and the display device more efficient.

[0099] (Supplementary Note 2) The connection status detection method according to Supplementary Note 1, wherein the first interface is the preset interface and is a primary interface that receives image data in priority over the second interface.

[0100] As a result, when a connection confirmation signal is received by the first interface set as the primary interface, the display device transmits a first response signal via the first interface. This makes it possible to determine whether the interface of the display device connected to the image output device is the first interface set as the primary interface. It also makes it possible to determine whether normal communication can be performed between the first interface set as the primary interface and the image output device.

[0101] (Appendix 3) 3. The connection status detection method according to claim 1, further comprising transmitting a second response signal from the second interface when the connection confirmation signal is received by the second interface.

[0102] As a result, when the display device receives a connection confirmation signal via a second interface that is different from the first interface, which is a preset interface, the second response signal is transmitted via the second interface, making it possible to determine whether the interface of the display device connected to the image output device is the second interface. If the image output device is unable to receive the first response signal or the second response signal, it can be determined that the display device itself is faulty. If the image output device receives the first response signal or the second response signal, it can be determined that the first interface is faulty or that the cable connecting the display device and the image output device is broken.

[0103] (Appendix 4) The connection status detection method according to any one of appendices 1 to 3, further comprising: when the connection confirmation signal is received by an interface other than the predetermined interface among the first interface and the second interface, executing an alarm operation by the display device.

[0104] As a result, when a connection confirmation signal is received via an interface other than the preset interface, the display device executes a notification operation, so that it can be confirmed by the notification operation executed by the display device that the interface of the display device to which the image output device is connected is not the preset interface.

[0105] (Appendix 5) 5. The connection status detection method according to claim 4, wherein executing a notification operation by the display device includes displaying a preset image by the display device.

[0106] As a result, when a connection confirmation signal is received via an interface other than the preset interface, the preset image is displayed on the display device, so that it is possible to confirm that the interface of the display device to which the image output device is connected is not the preset interface by visually checking the preset image displayed on the display device.

[0107] (Appendix 6) A connection status detection method described in any one of Appendixes 1 to 3, including prohibiting the display device from transmitting the first response signal if the interface that received the connection confirmation signal is not the pre-set interface.

[0108] As a result, if the interface that receives the connection confirmation signal is not a preset interface, the display device is prohibited from transmitting the first response signal. Therefore, the image output device can determine whether the interface of the display device to which the image output device is connected is a preset interface based on whether the first response signal is received. This reduces the workload of confirming the connection between the image output device and the display device, and makes the connection process between the image output device and the display device more efficient.

[0109] (Appendix 7) A connection status detection method according to any one of appendices 1 to 6, further comprising accepting a selection of an interface to be set as a primary interface from among the first interface and the second interface.

[0110] This allows the user to select the primary interface from the first interface and the second interface, thereby enabling the user to select the interface for checking the connection between the image output device and the display device, further reducing the workload.

[0111] (Appendix 8) A display system including: a display device having a first interface and a second interface; and a first image output device connected to the display device and transmitting a connection confirmation signal to the display device, wherein the display device transmits a first response signal from a predetermined interface out of the first interface and the second interface when the display device receives the connection confirmation signal via the predetermined interface.

[0112] According to this configuration, if the interface that receives the connection confirmation signal from the first image output device is a preset interface, the display device transmits a first response signal via the preset interface. This allows the first image output device to determine whether the interface of the display device to which the first image output device is connected is a preset interface. This reduces the workload of confirming the connection between the first image output device and the display device, and improves the efficiency of the connection process between the first image output device and the display device.

[0113] (Appendix 9) The display system of Appendix 8 further includes a second image output device connected to the display device, and further performs the following: when the first image output device does not receive the first response signal from the display device, the second image output device transmits the connection confirmation signal; and when the first image output device receives the connection confirmation signal from the second image output device via the preset interface, the display device transmits the first response signal via the preset interface.

[0114] According to this configuration, if the first image output device does not receive a first response signal from the display device, the second image output device transmits a connection confirmation signal to the display device. If the display device receives a connection confirmation signal from the second image output device via a preset interface, the first response signal is transmitted via the preset interface. Therefore, by checking whether the image output device that received the first response signal is the first image output device or the second image output device, it is possible to confirm the image output device connected to the preset interface. This reduces the workload of confirming the connections between the first and second image output devices and the display devices, and improves the efficiency of the connection process between the first and second image output devices and the display devices.

[0115] (Appendix 10) A display device comprising a first interface, a second interface, and at least one processor, wherein the at least one processor transmits a first response signal via a predetermined interface out of the first interface and the second interface when the at least one processor receives a connection confirmation signal via the predetermined interface.

[0116] As a result, if the interface that receives the connection confirmation signal from the image output device is a preset interface, the display device transmits a first response signal via the preset interface. This allows the image output device to determine whether the interface of the display device to which the image output device is connected is a preset interface. This reduces the workload of confirming the connection between the image output device and the display device, and makes the connection process between the image output device and the display device more efficient. [Explanation of symbols]

[0117] 1...display system, 10...projection surface, 50A, 50B...cable, 100, 100A, 100B...information processing device, 110A, 110B...processing device I / F, 120A, 120B...operation unit, 150, 150A, 150B...first control unit, 160, 160A, 160B...first memory unit, 161A, 161B...OS, 163A, 163B...APP, 170A, 170B...first processor, 200... Projector, 201...remote control, 205...operation signal receiving unit, 210...projector I / F, 210A...first I / F, 210B...second I / F, 220...image processing unit, 225...frame memory, 230...image projection unit, 231...light source, 233...light modulation device, 235...optical unit, 250...second control unit, 260...second memory unit, 265...control program, 270...second processor.

Claims

1. a first response signal is transmitted from a preset interface when a connection confirmation signal from an image output device connected to a display device having a first interface and a second interface is received via a preset interface of the first interface and the second interface; A connection state detection method comprising:

2. the first interface is the predetermined interface and is a primary interface that receives image data in preference to the second interface; The connection state detection method according to claim 1.

3. transmitting a second response signal from the second interface when the connection confirmation signal is received by the second interface; The connection state detection method of claim 1 , further comprising:

4. executing a notification operation by the display device when the connection confirmation signal is received by an interface other than the predetermined interface among the first interface and the second interface; The connection state detection method according to claim 1 , further comprising:

5. Executing a notification operation by the display device includes: displaying a preset image on the display device; The connection state detection method according to claim 4, comprising:

6. prohibiting the display device from transmitting the first response signal if the interface through which the connection confirmation signal is received is not the preset interface; The connection state detection method according to claim 1 , further comprising:

7. receiving a selection of an interface to be set as a primary interface from the first interface and the second interface; The connection state detection method of claim 2 , further comprising:

8. a display device including a first interface and a second interface; a first image output device connected to the display device and transmitting a connection confirmation signal to the display device; Including, When the display device receives the connection confirmation signal via a preset interface out of a first interface and a second interface, the display device transmits a first response signal from the preset interface. Display system.

9. further comprising a second image output device connected to the display device; transmitting the connection confirmation signal from the second image output device when the first image output device does not receive the first response signal from the display device; transmitting the first response signal via the preset interface by the display device when the connection confirmation signal from the second image output device is received via the preset interface; Further implementation of The display system of claim 8 .

10. a first interface and a second interface; at least one processor; The at least one processor a display device that, when receiving a connection confirmation signal via a preset interface out of the first interface and the second interface, transmits a first response signal via the preset interface.

Images