Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Tomohisa Tagami

Isao Kawahara

Yoshio Seki

Hideaki Yamauchi

Masaki Tokoi

A projection device of the present disclosure includes a projection unit for radiating on a projection target object in a time-divided manner, in one frame period of a video, a visible light image that is based on a video signal and an invisible light image for acquiring predetermined information, and a controller for controlling an order of a radiation period for the visible light image and a radiation period for the invisible light image in the one frame period. The controller includes, as a radiation mode, a first mode for radiating the invisible light image in a manner of distributing the invisible light image over a plurality of periods within the one frame period.

Projection device, and projection method

A video signal processing device is a video signal processing device for converting an input first video signal to a second video signal, and inputting to a display panel, the video signal processing device including an input unit for receiving an input of a set value of the second video signal to be converted and output in correspondence to a signal level for each of a plurality of sample points of the signal level of the first video signal; a calculating unit for interpolation calculating the signal level of the second video signal to be converted and output for the signal level between each sample points; and a control unit for transferring a conversion table including a set value of the second video signal for each sample point of the first video signal and an interpolation calculated interpolation value between each sample points to a memory unit; wherein the memory unit converts to the second video signal of a corresponding signal level based on the conversion table according to the signal level of the input first video signal, and outputs the second video signal.

Video signal processing device and video signal processing method

There is provided a low-cost scanning line converting circuit being capable of properly converting the number of scanning lines for a video signal at various conversion ratios. Under the control of a write control signal generating circuit, an original video signal is written, on a scanning-line basis, in individual line memories. A write operation is performed to each of the line memories based on a clock and a horizontal synchronizing signal on the input side, while a read operation is performed to each of the line memories based on a clock and a horizontal synchronizing signal on the output side. A selecting circuit selects, based on a line select signal, at least one from scanning line signals stored in the individual line memories necessary to generate a post-conversion scanning line signal and outputting the selected scanning line signal. Coefficient multipliers multiply the scanning line signal selectively outputted by interpolation coefficients (1&minus;k) and k and an adder adds up the results of multiplication to output the sum as the post-conversion scanning line signal. A coefficient control circuit and a dividing circuit are capable of generating a coefficient direct signal k in accordance with a ratio for converting the number of signal lines.

Scanning line converting circuit and interpolation coefficient generating circuit

The invention includes an interpolation circuit for generating interpolation scanning lines by averaging adjacent scanning lines from an interlaced input video signal. Also included is a motion detecting circuit for detecting the amount of motion of the input video signal. The output signal of the interpolation circuit is connected to an amplitude control circuit controlled by the amount of motion from the motion detecting circuit. The input video signal terminal and the output terminal of the amplitude control circuit are connected to a converter circuit which performs time division multiplexing of the interlaced input video scanning lines and interpolation scanning lines by using a clock 2fH from a control signal input terminal. The clock has a frequency which is two times the horizontal scanning frequency. The motion detecting circuit detects the amount of motion and if the amount of motion is small, amplitude control of the interpolation scanning lines is not-performed. If the amount of motion is large, control is performed in the amplitude control circuit to provide an amplitude difference between the real scanning lines and the interpolation scanning lines.

Growing community of inventors

Osaka, Japan

Tomohisa Tagami