Abstract: A method of controlling a projector includes detecting whether a human is present or absent between a projection surface and the projector, emitting a first sound when it is detected that the human is present, determining whether or not detecting that the human is present continues during a first period having a first time length, projecting, by the projector, a first projection image including a first image on the projection surface when it is determined that the detecting that the human is present continues, and projecting, by the projector, a second projection image not including the first image on the projection surface when it is determined that the detecting that the human is present does not continue.

Abstract: A method of controlling a projector includes detecting whether a human is present or absent between a projection surface and. the projector, emitting a first sound. when it is detected that the human is present, determining whether or not detecting that the human is present continues during a first period having a first time length, projecting, by the projector, a first projection image including a first image on the projection surface when it is determined that the detecting that the human is present continues, and projecting, by the projector, a. second projection image not including the first image on the projection surface when it is determined that the detecting that the human is present does not continue.

Abstract: An image display device adapted to display an image includes a connection section to which an interface board replaceable is connected, and which communicates with an external device via the interface board, a failure detection section adapted to detect a failure of the interface board connected to the connection section, and a control section adapted to limit power supply to the interface board in a case in which the failure detection section has detected the failure of the interface board.

Abstract: An image display apparatus includes a display unit that displays an image, a connection unit connected to a replaceable interface board and communicating with an external apparatus via the interface board; and a control unit that determines a type of the interface board connected to the connection unit and restricts power supply to the interface board based on the type of the interface board.

Abstract: A display apparatus includes a plurality of input terminals capable of receiving image signals, a first display part showing whether or not the input terminal accepts the image signal with respect to each input terminal of the plurality of input terminals, an image display unit that displays an image according to the image signal received by a selected input terminal selected from the plurality of input terminals on a display surface, and a second display part showing the selected input terminal.

Abstract: A projector including a light source, a power supply section, a power supply control section that controls power supply from the power supply section, a projection lens that projects an image, and a projection system driver that moves the projection lens, wherein the power supply control section performs, as power supply modes, an operation mode in which power is supplied to the light source section to allow the light source section to output light and a first standby mode in which the power supply to the light source section is terminated, and in the first standby mode, power is supplied to the projection system driver to allow the projection lens to move to an attachment/detachment position where the projection lens is attachable and detachable.

Abstract: An image display device adapted to display an image includes a connection section to which an interface board replaceable is connected, and which communicates with an external device via the interface board, a failure detection section adapted to detect a failure of the interface board connected to the connection section, and a control section adapted to limit power supply to the interface board in a case in which the failure detection section has detected the failure of the interface board.

Abstract: An image display apparatus includes a display unit that displays an image, a connection unit connected to a replaceable interface board and communicating with an external apparatus via the interface board; and a control unit that determines a type of the interface board connected to the connection unit and restricts power supply to the interface board based on the type of the interface board.

Abstract: A display apparatus includes a plurality of input terminals capable of receiving image signals, a first display part showing whether or not the input terminal accepts the image signal with respect to each input terminal of the plurality of input terminals, an image display unit that displays an image according to the image signal received by a selected input terminal selected from the plurality of input terminals on a display surface, and a second display part showing the selected input terminal.

Abstract: A projector including a light source, a power supply section, a power supply control section that controls power supply from the power supply section, a projection lens that projects an image, and a projection system driver that moves the projection lens, wherein the power supply control section performs, as power supply modes, an operation mode in which power is supplied to the light source section to allow the light source section to output light and a first standby mode in which the power supply to the light source section is terminated, and in the first standby mode, power is supplied to the projection system driver to allow the projection lens to move to an attachment/detachment position where the projection lens is attachable and detachable.

Abstract: In at least one embodiment, a projection display device comprises a device main body, a shutter that opens and closes an opening for ventilation, and an electricity storage section that stores power from an external power source. If an interruption detecting section detects a power supply from the external power source is stopped and a time in which the power supply is stopped is longer than a predetermined time, the interruption detecting section detects that the external power source is interrupted. If the interruption of the external power source is detected, a control section performs a control to reduce a power consumption of the device main body and a control to drive the shutter so that the shutter is closed by the power supplied from the electricity storage section.

Abstract: A projector includes a light source, a light modulation device that modulates light emitted from the light source according to a video signal, a projection optical system that projects image light which is modulated by the light modulation device, a display unit that is provided in a main body of the projector, an acquisition unit that acquires information indicating a state regarding the video signal, and a control unit that displays the information indicating a state regarding the video signal, acquired by the acquisition unit, on the display unit.

Abstract: An image display apparatus includes: an HDBaseT receiver circuit that receives signals based on N (N is an integer number satisfying N?2) standards that can be transmitted as HDBaseT signals; a dedicated receiver circuit that is compliant with only a first standard of the N standards and receives signals of the first standard; a signal processing unit that processes the signals received by the HDBaseT receiver circuit or the dedicated receiver circuit; and a circuit switching unit that switches an output target circuit that outputs the signals of the first standard to the signal processing unit to one of the HDBaseT receiver circuit and the dedicated receiver circuit.

Abstract: An image display device includes: a first audio signal input terminal to which a first audio signal is input from a microphone; and a control section adapted to control power supply from a power supply circuit to the microphone based on type information indicative of whether a type of the microphone to be connected to the first audio signal input terminal is a first type which is requiring power supply or a second type which is not requiring power supply.

Abstract: An image display apparatus includes: an HDBaseT receiver circuit that receives signals based on N (N is an integer number satisfying N?2) standards that can be transmitted as HDBaseT signals; a dedicated receiver circuit that is compliant with only a first standard of the N standards and receives signals of the first standard; a signal processing unit that processes the signals received by the HDBaseT receiver circuit or the dedicated receiver circuit; and a circuit switching unit that switches an output target circuit that outputs the signals of the first standard to the signal processing unit to one of the HDBaseT receiver circuit and the dedicated receiver circuit.

Abstract: In at least one embodiment, a projection display device comprises a device main body, a shutter that opens and closes an opening for ventilation, and an electricity storage section that stores power from an external power source. If an interruption detecting section detects a power supply from the external power source is stopped and a time in which the power supply is stopped is longer than a predetermined time, the interruption detecting section detects that the external power source is interrupted. If the interruption of the external power source is detected, a control section performs a control to reduce a power consumption of the device main body and a control to drive the shutter so that the shutter is closed by the power supplied from the electricity storage section.

Abstract: An electricity storage section that stores power from an external power source and supplies the stored power as operating power is provided, and, when an interruption of the external power source to a projection display device is detected, control to reduce the power consumption of a device main body and control to drive an exhaust port shutter so that it is closed by the power supplied from the electricity storage section are performed.

Abstract: An image display apparatus includes: an HDBaseT receiver circuit that receives signals based on N (N is an integer number satisfying N?2) standards that can be transmitted as HDBaseT signals; a dedicated receiver circuit that is compliant with only a first standard of the N standards and receives signals of the first standard; a signal processing unit that processes the signals received by the HDBaseT receiver circuit or the dedicated receiver circuit; and a circuit switching unit that switches an output target circuit that outputs the signals of the first standard to the signal processing unit to one of the HDBaseT receiver circuit and the dedicated receiver circuit.

Abstract: A projector includes: a first audio input section adapted to input a first sound signal; a second audio input section adapted to input a second sound signal; a first sound amplifier section adapted to amplify the first sound signal received through the second audio input section to generate a first amplified signal; a second sound amplifier section adapted to amplify the second sound signal received through the second audio input section to generate a second amplified signal; a first audio output section adapted to output a first sound based on the first amplified signal; a second audio output section adapted to output a second sound based on the second amplified signal; and a determination section adapted to determine whether or not the first sound signal is being input.

Abstract: An electricity storage section that stores power from an external power source and supplies the stored power as operating power is provided, and, when an interruption of the external power source to a projection display device is detected, control to reduce the power consumption of a device main body and control to drive an exhaust port shutter so that it is closed by the power supplied from the electricity storage section are performed.