Hitachi, Ltd.

Mitsuo Okimoto

Nobuo Masuoka

Yoshie Kodera

Sadayuki Nishimura

Toshihiko Matsuzawa

Koji Hirata

Mikio Shiraishi

Shigeru Mori

Hiroki Yoshikawa

Michitaka Ohsawa

Takaaki Matono

Yuichiro Kimura

Kazuhiro Kaizaki

Takahiko Yoshida

Isao Yoshizaki

Yasuji Noguchi

Kuninori Matsumi

Sadao Kubota

Tooru Numata

Chiharu Ishino

Kenicji Matsumoto

Akito Takemoto

According to the present invention, the amount of usage of a heat conductive member for fixing a self-luminous flat display panel to a metallic chassis member disposed at the back of the display panel is reduced in the thickness direction as well as in the surface direction. The invention further provides a technique for efficiently radiating heat from the display panel, suppressing cost increase. To this end, in the invention, the heat conductive member is a hot-melt adhesive having adhesion at room temperature and filled with a heat conduction imparting agent, and the display panel is fixed to the chassis member by a plurality of heat conducting sections of the heat conductive member formed discretely ranging from 0.3 to 0.8 mm in thickness.

Flat-panel display apparatus

The invention provides a technique enabling an image of high quality to be displayed while decreasing an effect of an outside light proceeding toward a back surface of PDP through a through hole for mounting an electric circuit on a chassis. A flat panel display of the invention includes a display panel, a metallic chassis having a through hole and joints for connecting the back surface of the display panel and the chassis to each other. The joints are on the back surface of the display panel distant from each other in a predetermined direction, and one of the joints is arranged at a position corresponding to the through hole of the chassis.

Flat panel display

A plurality of photo detectors are arranged outside the display screen of a projection display apparatus having a built-in digital convergence correction system and a function for adjusting data in the frame memory so as to coincide the photoelectric devices of the photo detectors with the adjustment patterns is provided. The adjusted data when the convergence on the entire screen of the display is adjusted and the adjusted data when the convergence is adjusted by the adjustment function before misconvergence is generated are memorized beforehand. When misconvergence is generated, the convergence is adjusted by the adjustment function again, and a corresponding correction value is obtained on the photo detector by calculating the adjusted data at this time and the prememorized adjusted data, and a correction value on the entire screen is obtained by executing an interpolation calculation from this correction value, and the misconvergence on the entire screen is corrected.

Convergence correction system with recovery function and display

A projection type image display device provided with three projecting lenses projecting light emitted by cathode-ray tubes of different colors, red, green and blue, on a screen while enlarging an image is disclosed, in which clapper plates are disposed preferably in front of the red and the blue image source and the clapper plates have different shapes so as to obtain an image without the fluctuation in the color on the whole surface of the screen, even in the case where the distance from the cathode-ray tubes to the screen is shortened in order to reduce the size of the display device.

Optical system for projection type image display device

Growing community of inventors

Chigasaki, Japan

Mitsuo Okimoto