Nec Display Solutions, Ltd.

Nec Corporation

Tohru Kataoka

Kenji Ishida

Keisuke Momose

An image display device that is daisy-chain connected includes: a storage unit that holds identification data that include information of its own device; and a control unit that, when a next-stage side apparatus is connected that is an image display device that can receive a video signal relayed by its own device, receives the identification data of the next-stage side apparatus from that next-stage side apparatus, and when the identification data that were received indicate that the next-stage side apparatus is the same apparatus type as its own device, retains the identification data of its own device without alteration.

Image display device, connection method of image display device, and multi-display system

A projector includes: an image input unit that, upon the input of a first image signal synchronized with a vertical synchronizing signal, sends image input information; a resolution conversion output unit that converts the first image signal to a second image signal that indicates an image with a prescribed resolution and supplies the result as output; a light source unit that is provided with a light source and an image-forming element that uses illumination light from the light source to generate image light; a light source control unit that uses the image input information to control the light quantity of the light source; and an image-forming element drive unit that drives the image-forming element on the basis of the second image signal. The image input unit sends image input information synchronized with a second vertical synchronizing signal that follows the first vertical synchronizing signal.

Projector and method for controlling light source for projector

An input signal is input to a detector and a synchronizing frequency of the input signal is detected by a frequency detector. Then, the number of the horizontal lines per vertical period of the input signal is determined according to the synchronizing frequency by a calculator. A control signal for defocusing an electron beam with which a blue fluorescent substance emits light is generated from a defocus controller according to the number of the horizontal lines of the input signal. Here, a range of control signals is previously stored corresponding to a range of numbers of horizontal lines. A focus signal for exactly focusing the electron beam is added to the control signal output from the defocus controller by an adder. Then, the defocus signal is output tom the adder. The defocus signal is amplified by a focus adjusting amplifier 15. The diameter of the electron beam with which the blue fluorescent substance emits the light is controlled according to the amplified defocus signal by a focus adjusting coil.

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Tokyo, Japan

Tohru Kataoka