Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Kazuo Mukai

Masutaka Inoue

Takahiro Takemori

A projection-type image display device includes a first housing and a second housing. The first housing houses a light source unit configured to emit light, an image generating unit configured to modulate the light from the light source unit according to a video input signal to generate image light, and a projecting unit configured to project the image light generated by the image generating unit. The second housing includes an output unit configured to output a light signal and/or an input unit configured to input a light signal which are/is exposed and arranged on a surface of the second housing.

Projection-type image display device

An image display apparatus of the present invention includes: a picture display unit that forms and displays an optical image based on a video signal; a gamma adjustment image display unit that displays a gamma adjustment image containing input/output characteristics of a signal level of the video signal in the displayed optical image; an adjustment operation unit that changes the displayed input/output characteristics on the image; and an input/output characteristics setting unit that sets input/output characteristics of the signal level of the video signal in accordance with the input/output characteristics changed on the image. The adjustment operation unit includes a point selecting part that selects an adjustment point desired to be changed in the input/output characteristics displayed in the image and a level changing part that is capable of changing both of an input level and an output level of the selected adjustment point. Because both of an input signal level and an optical output level can be adjusted, a user can make gamma adjustment easily, freely, and in detail.

Image display apparatus and image display method

Difference values that are defined as values representing a magnitude of an influence exerted upon an illuminance of an ambient environment according to a brightness component of an input video signal and are set so as to correspond to the brightness component based on a result of measuring the magnitude of the influence previously, a plurality of illuminance ranges set by dividing an extent of the illuminance of the ambient environment, and brightness correction characteristic data for correcting the brightness component according to each of the illuminance ranges are stored. The brightness component is detected, so that the difference values are selected based on the detected value (S), an illuminance sensor measures the illuminance of the ambient environment repeatedly (S), one of the illuminance ranges is selected based on illuminance detection values obtained by previous and current measurements and the selected difference values (S), and the brightness correction characteristic data according to the selected illuminance range is selected, so that the brightness component of the input video signal is corrected (S). By reflecting the influence of reflected light from a screen due to image projection based on the input video signal, the brightness can be corrected stably according to a change in the brightness of the use environment.

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Kyoto, Japan

Kazuo Mukai