Hitachi, Ltd.

Yasuhiro Tomita

Yutaka Yamada

Yoshiharu Yamashita

Seiichi Sekiguchi

Teppei Tanaka

Kohei Miyoshi

Yasuhiro Kasahara

Yasushi Naito

Takaaki Matono

Toshihiko Matsuzawa

Koichi Sudo

Makoto Kitamura

Kouichi Sugimoto

Fumiyoshi Akiyama

A flat panel display apparatus includes a plasma display panel, a power supply substrate, a signal processing substrate, a Y sustaining substrate, and an X sustaining substrate. The power supply substrate, the signal processing substrate, the Y sustaining substrate and the X sustaining substrate are arranged at a back of the plasma display panel. When viewing the plasma display panel from the back, the power supply substrate is arranged at a center portion of the plasma display panel, the Y sustaining substrate is arranged at one of a left and right side of the plasma display panel, the X sustaining substrate is arranged at the other of the left and right side, and the signal processing substrate is arranged under the X sustaining substrate. A circuit substrate other than the power supply substrate, the Y sustaining substrate, and the X sustaining substrate is arranged under the power supply substrate.

Flat panel display

Space is decreased in the direction of thickness on a side of a substrates mounted on a back of a flat panel display to adapt requirement for increasing and thinning its size, and most flat panel displays forcibly radiate heat with a fan provided thereon. The present invention provides a flat panel display having fewer heat radiating fans to secure a channel for causing a heat radiating air to flow. Portions where electronic circuit device on a back of a display panel are mounted are divided into three: left; center; and right portions; with a main frame as a border, the electronic circuit device are constructed of four module substrates, the substrate which is the greatest in heating value in the four module substrates (hereinafter referred to as a substrate) is arranged in the center portion and the substrates which are the smallest and the second smallest in heating value therein are arranged in the same portion.

An image display apparatus capable of automatically controlling an output status for each of audio information signals inputted with image information signals from various different image sources. A first signal input circuit inputs an image information signal and an audio information signal from a personal computer. A second signal input circuit inputs an image information signal and an audio information signal of a television signal. An image selection circuit selects the first or second signal input circuit. An image conversion circuit converts the selected image information signal to a signal having the number of pixels corresponding to a display circuit. An audio signal selection circuit selects the first or second signal input circuit. An audio signal control circuit controls an output status for the input audio signal. An operation device inputs a setting of the image display apparatus, such as luminance, by user's operation. A control circuit controls the selection circuits and the audio signal control circuit, in accordance with the operation device. A memory circuit is used for storing the setting of the image display apparatus set by the user and the output status for the audio signal. The stored contents are read by the controller, and audio output is controlled by the audio signal control circuit.

Image display apparatus having audio output control means in accordance with image signal type

The present invention aims at providing an image display apparatus capable of displaying both a television signal and an image signal supplied from a personal computer with a high picture quality on a high definition display unit having 1024 by 768 pixels. In order to achieve this object, an image display apparatus according to the present invention includes an NTSC-VGA conversion circuit for converting a television signal to a signal having 640 by 480 pixels and corresponding to the non-interlacing VGA standard, a switch unit for selecting and outputting either the signal outputted from the NTSC-VGA conversion circuit and an inputted image signal from a personal computer, and a VGA-XGA conversion circuit for converting a number of pixels of a signal outputted from the switch unit to a number of pixels 1024 by 768 substantially equivalent to the number of the display unit.

Image display apparatus capable of displaying personal computer signals

Growing community of inventors

Odawara, Japan

Yasuhiro Tomita