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: 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: A projector includes: a power supply device; an image projection device having a light source device; a sound processing device adapted to process a sound signal from an external microphone; and a control device adapted to control the power supply device, wherein the control device can selectively set either one of a first operation mode in which the light source device and the sound processing device are made to be supplied with electrical power and a second operation mode in which the sound processing device is made to be supplied with the electrical power while halting supplying the electrical power to the light source device, and the control device controls the electrical power supply by the power supply device to the light source device and the sound processing device based on the operation mode set.

Abstract: Aspects of the invention can provide a projector that can include a light source unit, an optical modulation element that modulates light from the light source unit on the basis of image data, a light adjusting unit that adjusts the amount of light incident on the light modulation element from the light source unit, and a control unit that controls the light modulation element and the light adjusting unit. The control unit can perform light adjustment control to adjust the amount of light according to a luminance distribution pattern of image data for the light adjusting unit and can perform correction control to correct display irregularity of image data based on the adjustment of the amount of light for the light modulation element.

Abstract: An input device includes: a tapping sound detector configured to detect a tapping sound made by a user to generate a tapping sound detection signal; a converter configured to convert the tapping sound detection signal into an input operation signal; and an operation signal output device configured to output the input operation signal. The operation signal output device includes a wireless transmitter.

Abstract: Aspects of the invention can provide a projector that can include a light source unit, an optical modulation element that modulates light from the light source unit on the basis of image data, a light adjusting unit that adjusts the amount of light incident on the light modulation element from the light source unit, and a control unit that controls the light modulation element and the light adjusting unit. The control unit can perform light adjustment control to adjust the amount of light according to a luminance distribution pattern of image data for the light adjusting unit and can perform correction control to correct display irregularity of image data based on the adjustment of the amount of light for the light modulation element.

Abstract: An input device includes: a tapping sound detector configured to detect a tapping sound made by a user to generate a tapping sound detection signal; a converter configured to convert the tapping sound detection signal into an input operation signal; and an operation signal output device configured to output the input operation signal. The operation signal output device includes a wireless transmitter.

Abstract: An input device includes: a tapping sound detector configured to detect a tapping sound made by a user to generate a tapping sound detection signal; a converter configured to convert the tapping sound detection signal into an input operation signal; and an operation signal output device configured to output the input operation signal. The operation signal output device includes a wireless transmitter.

Abstract: The present invention relates to a pointing position detection device that can automatically sense a pointing position within a display region. This pointing position detection device comprises a CCD camera acquiring an image of a display region in which an image has been displayed; a binary-data processing section for detecting a pointing position of a shadow region or an actual image region that is an image region of a pointing image included within an image-acquisition area, based on an image-acquisition signal of the CCD camera 14; and a pointing coordinates detection section.

Abstract: An input device includes: a tapping sound detector configured to detect a tapping sound made by a user to generate a tapping sound detection signal; a converter configured to convert the tapping sound detection signal into an input operation signal; and an operation signal output device configured to output the input operation signal. The operation signal output device includes a wireless transmitter.

Abstract: A head-mounted display device for enlarging an image formed by an image display element as a virtual image. The head-mounted display device according to this invention comprises a virtual image forming optical system (3) including an image display element (9) and a lens (11) for enlarging an image formed by the image display element (9); a device main body (1) that houses the image forming optical means (3); and a switching means mounted in the device main body (1) for holding the virtual image forming optical system (3) in such a way that the system (3) can be moved in the direction of the width of the eye and placing the virtual image forming optical system (3) in front of one of the user's eyes. The image display element (9) and the lens (11) are disposed so that the optical axis of the virtual image forming optical system (3) approximately aligns with the user's line of sight taken while he or she is looking horizontally.