Pioneer Electronic Corporation

Pioneer Electronics Corporation

Tomihiro Oguchi

Tadashi Suzuki

Junichi Imai

Nozomu Kikuchi

Akihiro Ono

Shinichi Ogura

Manabu Akagi

Hiroyuki Takahori

Hirokazu Izumi

Hiroyuki Kubozoe

Tutomu Henmi

Tadashi Toriumi

Hiroshi Tamura

Yoshihide Hamaguchi

Kiyoshi Sugibayashi

A reflection mirror of a projection display unit which displays a stereoscopic image through a light polarization glasses, reflects a linearly polarized light emitted from a projection source through a polarizing plate toward a screen. The reflection mirror includes: a glass substrate; a metal film provided on the glass substrate; a first dielectric film provided on the metal film; and a second dielectric film provided on the first dielectric film, wherein each of the first and second dielectric films includes a predetermined thickness and a predetermined refractive index so that a phase difference between a p-polarized light of a reflected light and a s-polarized light of the reflected light is within a range from -45 degree to 45 degree in case of an incident angle of the linearly polarized light being varied from 0 degree to 45 degree.

Reflection mirror

A high definition television monitor which raises the level of a convergence voltage by a predetermined voltage in one of two consecutive horizontal periods in which the same video signal is produced, writes the same video image twice on the same line during the consecutive 2H, thereby displaying a video image of the normal standard on a CRT display with a satisfactory picture quality.

High definition television monitor for displaying video images

A method for tuning a television receiver in which an optimum local oscillator frequency is selected for offset stations. A local oscillator frequency of the receiver is incremented in steps of a first predetermined frequency interval beginning with a frequency at the bottom of an offset band around the center frequency of the local oscillator. As the local oscillator frequency is scanned, when both an up signal, indicative that the tuning frequency is above a predetermined range around the actual frequency of the received signal, and a down signal, indicative that the tuning frequency is below the predetermined range around the center frequency, the local oscillator is decremented by the first frequency interval and then incremented in a second, smaller frequency interval until the up and down signals are both lost. The local oscillator frequency is then increased and decreased by the first predetermined frequency interval, wherein, if both the up and down signals toggle states, the frequency at which both the up and down signals were lost when scanning with the second frequency interval is accepted as the best tuning frequency.

Station selecting method for television receiver

Growing community of inventors

Tokyo, Japan

Tomihiro Oguchi