Mitsubishi Electric Corporation

Kouji Okazaki

Akihiro Nagase

Takahiko Yamamuro

A 3D video system is disclosed. The 3D video system includes a frame rate converter that stores an input video signal in a rate conversion frame memory included in the frame rate converter, then reads and outputs the input video signal at a doubled clock rate, a signal format converter that converts a pixel sequence of the video signal output from the frame rate converter and outputs the converted video signal, a controller that outputs a timing signal based on the converted video signal, 3D glasses that transmit light alternately to left and right eyes, and switch the transmission of the light to the left and right eyes, based on the converted video signal and the outputted timing signal, and a spatial modulator that spatially modulates light emitted from a light source, based on the converted video signal. The 3D video system enables the modulated light to be viewed stereoscopically.

Image display apparatus and method

An image display apparatus for displaying a 3D video signal using a liquid crystal device such as an HIPS or LCOS device comprises a frame rate converter () that converts the input video signal to a doubled frame rate, a signal format converter () that converts the pixel sequence of the video signal, a light source controller () that outputs a light source control signal for turning the light source used for image display on and off, and a 3D glasses controller () that generates a glasses control signal (c) for shutters (R,L) that switch the transmission of the light to the right and left eyes of 3D glasses (). The risk of crosstalk between the right and left images, due to device response speed is reduced, without requiring a large number of frame memories.

An image display apparatus for displaying a 3D video signal using a liquid crystal device such as an HTPS or LCOS device comprises a frame rate converter () that converts the input video signal to a doubled frame rate, a signal format converter () that converts the pixel sequence of the video signal, a light source controller () that outputs a light source control signal for turning the light source used for image display on and off, and a 3D glasses controller () that generates a glasses control signal (c) for shutters (R,L) that switch the transmission of the light to the right and left eyes of 3D glasses (). The risk of crosstalk between the right and left images, due to device response speed is reduced, without requiring a large number of frame memories.

In a constant current switching power supply, the current flowing through the load, is feedback-controlled based on the deviation of the detection value (Id) from the target value (Ir), multiplied by a proportional gain (PG), the value of the gain is set to a predetermined value immediately after the load switching element () is turned on, and is thereafter gradually reduced with elapse of time. When the current to the load () is supplied by a PWM controlled switching circuit (), the PWM signal is determined based on a product of the deviation and a proportional gain. It is possible to shorten the rise time of a pulsative load current in a situation where the current is relatively large.

Constant current switching power supply apparatus, method of driving it, light source driving apparatus, method of driving it, and image display apparatus

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Tokyo, Japan

Kouji Okazaki