Hitachi, Ltd.

Hitachi Media Electronics Co., Ltd.

Mondis Technology Ltd.

Hitachi Mizusawa Electronics Co.

Hitachi Mizusawa Elec. Co Ltd

Hitachi Mizusawa

Kouji Kitou

Ikuya Arai

Yuji Sano

Michitaka Ohsawa

Sadao Tsuruga

Fumio Haruna

Ryuuichi Someya

Tetsunosuke Nakamura

Masaru Shimizu

Nobutaka Okuyama

Isao Yoshimi

Fumio Inoue

Soichi Sakurai

Kiyoharu Kishimoto

Masao Obara

Yasuhiro Imai

Tamotsu Nagabayashi

Jiro Kawasaki

Kouzou Masuda

Tsuyoshi Sano

Masatoshi Hirose

Makoto Onozawa

Masahiro Eto

Kazuo Majima

Kunio Umehara

Jun Miura

Hiroki Oguro

Yoshio Amemiya

Yoshio Yoshiwara

Kouji Fukuma

Minoru Furuya

Nobuaki Kabuto

Shinichi Yamada

Takuya Imaide

Hiroshi Koizumi

Takeshi Hoshino

Hiroshi Yoshioka

Toshimitsu Watanabe

Kazunori Iwabuchi

Eiichi Yamazaki

Michitaka Osawa

Kenichi Saitou

Moritaka Taniguchi

Hideo Sawada

Ichiro Niitsu

Masaaki Kurosu

Tomoko Ogawa

Hitoshi Yamadera

Atushi Takeyama

Masashi Ohki

Kazufumi Kikuchi

Mariko Tanaka

Disclosed herein is a discharge lamp lighting device which realizes the minute control of the lighting sequence and electric power of a high-pressure discharge lamp and the control of various anti-error protecting functions by mounting a microcomputer. However, since microcomputer processing typically progresses in accordance with the programs previously recorded on a ROM, various actions of the discharge lamp are controlled in accordance with ROM-recorded data settings. To modify these settings, the contents of the ROM need to be updated. Therefore, a function for communicating with an external device is assigned to the microcomputer so that various data settings can be modified.

Discharge lamp lighting device

An image display system includes a display device, an input section to which video signals of an interlace scanning system are inputted, a signal converter section which increases horizontal scanning lines of the inputted video signals in number by a factor of at least two, and which generates first and second fields, each of the fields including effective scanning lines used for displaying and ineffective scanning lines not used for displaying, with the effective and ineffective scanning lines being arranged alternately in each of the fields, and a display control section which controls the display device to display the first and second fields alternately. The display control section controls the display device such that positions of the effective scanning lines of the first fields correspond with those of the ineffective scanning lines of the second fields, and vice versa.

Image display system

A display unit for displaying an image based on video signals and synchronization signals inputted from an externally connected video source, includes a video circuit adapted to display an image based on the video signals sent by the externally connected video source, a memory which stores an identification number for identifying the display unit, and a communication controller which sends the identification number stored in the memory to the video source. The communication controller is capable of bi-directionally communicating with the video source.

Display unit with communication controller and memory for storing identification number for identifying display unit

A display unit having a processor adapted to control display of the display unit and a communication controller capable of bi-directionally communicating with a video source. The communication controller communicates information received from the video source to the processor.

Display unit with processor and communication controller which communicates information to the processor

A computing circuit computes a target value of a current to be supplied to a discharge lamp and generates a pulse control signal for superpose a pulse current. Furthermore, the computing circuit controls a current control circuit so that a pulse current is superposed on a lamp current at a predetermined cycle and power supplied to the discharge lamp is kept constant. For that purpose, the computing circuit lowers a DC current level of the lamp current when a pulse current is superposed on the lamp current, and exercises control so that an integrated amount of power at a predetermined cycle is equalized to a predetermined integrated amount of power.

Discharge lamp lighting device and projection type image display apparatus having the same

A discharge lamp lighting apparatus has a problem that a microcomputer within the apparatus falls down into malfunction due to noises generated in an inside thereof. With such the structure of the discharge lamp lighting apparatus that an operation of a calculation processing circuit, which is built up with the microcomputer, etc., is stopped through stopping the supply of electric power to the calculation processing circuit or bringing it into a sleep mode, it is possible to protecting it from the malfunction, during a time period when high voltage is generated just after starting of lighting of the discharge lamp. Also, with applying a protection processing by means of the calculation processing circuit and also applying an analog protection circuit, in common with, thereby it is possible to ensure reliability thereof further.

Discharge lamp lighting apparatus

A method for a display unit displaying video signals sent by a video source, the method comprising the steps of communicating display unit information stored in a memory of the display unit to the video source, wherein the display information includes identifying information of the display unit; receiving a signal from the video source, wherein the signal is generated based on at least a portion of the display unit information; and wherein the display unit is capable of bi-directionally communicating with the video source.

Method enabling display unit to bi-directionally communicate with video source

Disclosed herein is a discharge lamp lighting device which realizes the minute control of the lighting sequence and electric power of a high-pressure discharge lamp and the control of various anti-error protecting functions by mounting a microcomputer. However, since microcomputer processing-typically progresses in accordance with the programs previously recorded on a ROM, various actions of the discharge lamp are controlled in accordance with ROM-recorded data settings. To modify these settings, the contents of the ROM need to be updated. Therefore, a function for communicating with an external device is assigned to the microcomputer so that various data settings can be modified.

An image display system includes a memory for storing at least one scanning line of an inputted video signal of the interlace scanning system, and reading means for repeating to read the video signal of one scanning line from the memory at a speed which is n (n is an integer of 2 or more) times of the writing speed of the video signal for the memory for a horizontal scanning period which is 1/n of the writing period and to stop reading for a horizontal scanning period of the remaining (n&minus;1)/n for each scanning line of one field which is sequentially inputted and reading each scanning line so that the continuous fields interpolate the period of stopping of reading from the memory each other.

An image display apparatus capable of adjusting a display picture by an input unit through a computer body is disclosed. When the user inputs a control instruction for adjusting the display picture of the display unit by the input unit connected to the computer body, a control signal addition circuit prepares a control signal Sc corresponding to the control instruction and adds the control signal to a video signal R, G or B or a synchronizing signal Hs or Vs produced by a display control circuit during a vertical retrace period. A control signal separation circuit separates the added control signal Sc from the video signal R, G or B or the synchronizing signal Hs or Vs produced by the control signal addition circuit. A display control circuit produces adjustment signals Sa and Sb on the basis of the control signal from the control signal separation circuit to adjust a video circuit and a deflection circuit. Thus, the user can adjust the display picture by the input unit near at hand without extending the hands to adjustment switches of the display unit.

Display unit for displaying an image based on a video signal received from a personal computer which is connected to an input device

Image display apparatus

A display unit having a communication control circuit for communicating with an externally connected computer and which enables bi-directional communication with the display unit and the computer. The communication control circuit includes a comparator for comparing first identification information which is previously stored in said display unit and second identification information which is previously stored in the computer and is sent from the computer. The communication control circuit further includes at least one of a communication prohibitor for prohibiting communication between the computer with respect to display control of the display unit, when the first and second identification information do not match as a result of the comparison by the comparator or communication permitter for enabling communication for display control as a result of a match.

Display unit with controller enabling bi-directional communication with computer

A display unit and method having a communication controller which is capable of bi-directionally communication with a video source. Video signals for video display are received from the video source and a memory stores at least display unit information, wherein the display unit information includes identifying information of the display unit. The communication controller communicates the display unit information to the video source and the display unit receives a signal from the video source that is generated based on at least a portion of the display unit information.

Display unit and method enabling bi-directional communication with video source

In an image displaying system, the distribution of functions among the image displaying apparatus, the information processing apparatus, and an operating system controlling the operations of the information processing apparatus are clarified, and the capability of the image displaying apparatus to display an image with a display attribute varying from area to area on the display screen of the image displaying apparatus is determined. The image displaying system includes an image displaying apparatus having such a capability, and an information processing apparatus that can generate an image signal and transmit the image signal to the image displaying apparatus. The system can communicate according to USB standards, or according to DDC standards. The information processing apparatus transmits area-attribute information for changing a display attribute of a specific area on the display screen to the image displaying apparatus.

Image displaying system and information processing apparatus

Growing community of inventors

Hiratsuka, Japan

Kouji Kitou