Hitachi, Ltd.

Hitachi Video and Information System, Inc.

Takao Ohba

Toshio Hatada

Akira Yamagiwa

Hitoshi Matsushima

Hiroshi Inouye

Yoshihiro Kondou

Tadakatsu Nakajima

Kanji Otsuka

Motohiro Sato

Heikichi Kuwahara

Yuji Shirai

Susumu Iwai

Akira Tanaka

Kazuji Yamada

Hiroshi Inoue

Shigeo Ohashi

Hideki Kamimaki

Kiyokazu Nishioka

Hiroshi Ito

Munehisa Kishimoto

Tsuguji Tachiuchi

Michiharu Honda

Hiroichi Shinohara

Toshiki Iino

Nobuo Tsuchiya

Yuuji Shirai

Masahiro Jinushi

Koichi Isaji

Toshihiro Komatsu

Hitoshi Yoshidome

Hitoshi Sadamitsu

Toshihiro Komatu

Tetsuro Honma

Takashi Yoshitomi

Shingeo Ohashi

A data processing apparatus which includes a display unit and a power supply controller for supplying power to the display unit. The display unit has a display screen and a back light controller. The power supply controller comprises a switch, at least one output line for receiving the power from the switch and for supplying therethrough the power to electronic devices, a delay circuit for receiving the power from the switch and when the switch is turned ON to start supply of the power, for outputting the power after passage of a predetermined time from the start of the power supply, and a second output line for supplying the power from the delay circuit to the back light controller therethrough. The display unit has a memory means for storing therein a luminance data on the display screen through the back light controller when the power supply is turned OFF and for determining an output state of the display unit through the back light controller on the basis of the luminance data read out from the memory means when the power supply is turned ON. Further, the data processing apparatus has a means for invalidating output of a display data to be output onto the display screen and a means, after the display data is invalidated, for reducing a frequency of a timing signal or invalidating output of the timing signal for the display unit.

Data processing apparatus, power supply controller and display unit

An electronic computer cooling system having a cooling apparatus to cool an electronic computer and cooling members for thermally connecting semiconductor devices whose operating speeds are raised by cooling to a low temperature source of the cooling apparatus. Circuit boards onto which the semiconductor devices and the like constructing the electronic computer are mounted and the cooling apparatus such as a refrigerating apparatus and the like are compactly enclosed in a single casing. Or, the circuit boards and the cooling apparatus are compactly enclosed in separate detachable casings, respectively. Thus, a structure in which desired semiconductor devices can be certainly cooled by using the cooling members is obtained.

Cooling system of electronic computer using flexible members in contact

A cooling apparatus for electronic equipment for improving the reliability of the equipment by making uniform the temperature distribution of heat generating devices mounted on the electronic equipment, more particularly on a computer and for reducing the working process required at the time of performing a maintenance of a printed circuit board in the electronic equipment by stacking, in a frame, the electronic printed circuit boards on which the heat generating devices, such as a CPU and memories, are mounted at predetermined intervals. The cooling apparatus has a fan fastened to one wall surface of a chamber and a plurality of jet cooling devices formed on the surface opposing the wall surface. The jet cooling devices are formed in parallel to the printed circuit boards. The jet cooling devices are slits, or nozzles or jet stream ducts extending among the printed circuit boards and are so formed as to supply cooling air in a jet stream state to each heat generating device. Therefore, the cooling air can be concentrated to locally cool the printed circuit board including the device that generates heat of a large heating value. Hence, the temperature rise in the heat generating devices can be made uniform.

Jet cooling apparatus for cooling electronic equipment and computer

A cooling apparatus for an electronic device of high calorific density including an elastomer interposed between a semiconductor chip and a heat sink so as to connect them thermally. The elastomer may also be in close contact with a large number of semiconductor chips having various configurations which are mounted on a board, so that the elastomer is thermally connected with them, whereby the elastomer absorbs thermal deformations.

Cooling apparatus of electronic device

In a cooling apparatus of an electronic equipment, a plurality each of integrated circuit devices and large-scale integrated circuit devices are mounted onto a plurality of substrates, respectively, and a cooling fan supplies cooling air from outside to each of these integrated circuit devices. A duct having a comb-tooth shape suitable for encompassing each substrate and defining flow paths along the substrates introduces the cooling air supplied by the cooling fan to each of the integrated circuit devices. The duct includes a plurality of small holes disposed at positions corresponding to the positions of the integrated circuit devices on the substrates and having open areas corresponding to the heating values of the integrated circuit devices. The small holes flow the cooling air supplied by the cooling fan as jet streams to the integrated circuit devices. This jet stream cooling improves cooling performance and can make uniform the temperature distribution of the integrated circuit devices.

Cooling apparatus of electronic equipment

A semiconductor apparatus comprises a heat diffusing plate and a surface installing printed board. A semiconductor device of a high heat generation is installed on the heat diffusing plate. A surface installing package and chip parts are installed on both surfaces of the printed board. A through hole is formed at the center of the printed board so that the semiconductor device is located at the center. The heat diffusing plate on which the semiconductor device has been installed and the surface installing printed board are connected and integrated.

Semiconductor apparatus of module installing type

In a small-sized computer of a natural air-cooling type, a high-temperature radiator promotes natural convection so as to increase a quantity of heat radiation and to raise the allowable limit of heat generation of LSI chips, thereby improving the processing speed of the computer. For this purpose, a casing and fins are utilized as heat radiators at relatively low temperatures of about 40.degree. C. which are safe even if they are touched by an operator's hands. On the other hand, the high-temperature radiator set at about 50.degree. to 60.degree. C. is provided inside of the casing, thus preventing the operator's hands from touching it directly. Heat generated by the LSI chips and so forth is transmitted to the high-temperature radiator through heat conduction or the like, and heat exchange is performed between the high-temperature radiator increased in temperature and the air introduced into the casing, in order to promote natural convection inside of the casing.

Packaging structure of small-sized computer

An LSI cooling apparatus having various structures is used in electronic devices such as computer systems. In particular, the LSI cooling of apparatus is suitable for cooling of LSIs having high heat generating densities. In a cooling apparatus of the present invention, a heat sink is constructed to be small in pressure loss and excellent in cooling performance. This is because the heat sink comprises thin wire fins so set that the Reynold's number may not exceed 40. As a result, LSIs generating a large amount of heat can be cooled. Further, a heat sink having rigidity can be obtained by disposing wide-width wire drawn substances in thin wires or by using supports. Further, a computer comprising LSIs equipped with heat sinks can cope with various cooling air sending methods and it can be cooled with low noises.

LSI cooling apparatus and computer cooling apparatus

Growing community of inventors

Hadano, Japan

Takao Ohba