Abstract: An image projection apparatus includes a light irradiation device configured to irradiate a laser beam, an optical scan device configured to deflect the laser beam to make an optical scan, and project an image on a display region, an optical sensor arranged outside the display region, and including a first light receiving region and a second light receiving region that are arranged at different positions along a vertical scanning direction of the optical scan, and a deflection angle controller. The deflection angle controller corrects a deflection angle in the vertical scanning direction of the optical scan device, based on a number of times the laser beam is detected by the first light receiving region and a number of times the laser beam is detected by the second light receiving region.

Abstract: A display device that includes an attachment part mountable on a head of a user, a control device to control the attachment part, and a transmission cable to connect the attachment part with the control device, further includes an imager; a first converter configured to convert a digital signal from the imager into an analog signal; a second converter configured to convert the analog signal into a video signal; a laser light generator configured to generate a laser light modulated depending on the video signal; an optical scanner configured to scan the laser light; and an optical projection system configured to project the scanned laser light to form an image. The imager, the first converter, the optical scanner, and the optical projection system are placed in the attachment part. The second converter and the laser light generator are placed in the control device. The analog signal and the laser light are transmitted via the transmission cable.

Abstract: A display device that includes an attachment part mountable on a head of a user, a control device to control the attachment part, and a transmission cable to connect the attachment part with the control device, further includes an imager; a first converter configured to convert a digital signal from the imager into an analog signal; a second converter configured to convert the analog signal into a video signal; a laser light generator configured to generate a laser light modulated depending on the video signal; an optical scanner configured to scan the laser light; and an optical projection system configured to project the scanned laser light to form an image. The imager, the first converter, the optical scanner, and the optical projection system are placed in the attachment part. The second converter and the laser light generator are placed in the control device. The analog signal and the laser light are transmitted via the transmission cable.

Abstract: An image projection apparatus includes a light irradiation device configured to irradiate a laser beam, an optical scan device configured to deflect the laser beam to make an optical scan, and project an image on a display region, an optical sensor arranged outside the display region, and including a first light receiving region and a second light receiving region that are arranged at different positions along a vertical scanning direction of the optical scan, and a deflection angle controller. The deflection angle controller corrects a deflection angle in the vertical scanning direction of the optical scan device, based on a number of times the laser beam is detected by the first light receiving region and a number of times the laser beam is detected by the second light receiving region.

Abstract: A navigation data receiving device is so designed that the navigation data down-loaded in the hard disk of a portable personal compute is received through internet. The device includes a modem block 3 which adapted to receive navigation data through the internet; and a GPS block 22 adapted to receive GPS data of a GPS system. The modem block and the GPS block are built in the same PC card.

Abstract: A car navigation system with an FM multi-broadcast signal receiving function has: a function of displaying a current position on a display 17a according to position data which is received through a GPS antenna 12 from a satellite; and an FM multi-data display unit 17 which is arranged on a dash board 31 in front of the driver's seat of a vehicle.