Abstract: An image processing device includes: the determination unit that determines whether or not, among a plurality of pixels arranged linearly including a pixel of interest, a first adjacent pixel, and a second adjacent pixel, there is a pixel having a pixel value whose difference from a pixel value of the pixel of interest is greater than or equal to a reference value; a tone jump determination unit that determines whether or not a difference between an average value of pixel values of the first pixel group and an average value of pixel values of the second pixel group is less than or equal to a first threshold; and a correction unit that corrects atone jump of at least one pixel among the plurality of pixels.

Abstract: A projection display apparatus for projecting and displaying image light onto a projection plane includes an image light generator that generates the image light, a projection optical system including a projection lens that projects the image light onto the projection plane, a focus controller that controls focusing of the projection lens, and a temperature sensor that detects a temperature of the projection display apparatus. The focus controller operates to, calculate a plurality of focus deviation amounts which correspond respectively to a plurality of component groups based on first information obtained from the image light generator and second information obtained from the temperature sensor, the plurality of component groups being classified depending on kinds of components constructing the projection optical system, calculate a focus correction amount according to the plurality of focus deviation amounts calculated, and control the focusing based on the focus correction amount calculated.

Abstract: A video display apparatus functions as a master which is to be connected in loop to other video display apparatus(s) functioning as slave(s) in order to configure a multi-display apparatus. The master video display apparatus includes an extracting unit configured to extract first characteristic data from a received video signal, a controller configured to generate a common video setting value and control a light source of an own apparatus based on the generated common video setting value, an input unit configured to input second characteristic data from the upstream apparatus, and a output unit configured to output the first characteristic data or the common video setting value to the downstream apparatus. The controller outputs the extracted first characteristic data to the downstream apparatus, calculates the common video setting value based on the input second characteristic data, and outputs the calculated common video setting value to the downstream apparatus.

Abstract: A projection display apparatus for projecting and displaying image light onto a projection plane includes an image light generator that generates the image light, a projection optical system including a projection lens that projects the image light onto the projection plane, a focus controller that controls focusing of the projection lens, and a temperature sensor that detects a temperature of the projection display apparatus. The focus controller operates to, calculate a plurality of focus deviation amounts which correspond respectively to a plurality of component groups based on first information obtained from the image light generator and second information obtained from the temperature sensor, the plurality of component groups being classified depending on kinds of components constructing the projection optical system, calculate a focus correction amount according to the plurality of focus deviation amounts calculated, and control the focusing based on the focus correction amount calculated.

Abstract: A projection image display apparatus of the present disclosure is provided with a plurality of light sources, a light combiner combining light rays emitted from the light sources, a light modulation element modulating light emitted from the light combiner, and a projection optical system projecting an image emitted from the light modulation element. The light sources are each controlled by pulse width modulation signals, and duty ratios of the pulse width modulation signals to the light sources differ from each other at least in a part of a set range of an amount of light combined by the light combiner.

Abstract: A video display apparatus functions as a master which is to be connected in loop to other video display apparatus(s) functioning as slave(s) in order to configure a multi-display apparatus. The master video display apparatus includes an extracting unit configured to extract first characteristic data from a received video signal, a controller configured to generate a common video setting value and control a light source of an own apparatus based on the generated common video setting value, an input unit configured to input second characteristic data from the upstream apparatus, and a output unit configured to output the first characteristic data or the common video setting value to the downstream apparatus. The controller outputs the extracted first characteristic data to the downstream apparatus, calculates the common video setting value based on the input second characteristic data, and outputs the calculated common video setting value to the downstream apparatus.

Abstract: A video display apparatus functions as a master which is to be connected in loop to other video display apparatus(s) functioning as slave(s) in order to configure a multi-display apparatus. The master video display apparatus includes an extracting unit configured to extract first characteristic data from a received video signal, a controller configured to generate a common video setting value and control a light source of an own apparatus based on the generated common video setting value, an input unit configured to input second characteristic data from the upstream apparatus, and a output unit configured to output the first characteristic data or the common video setting value to the downstream apparatus. The controller outputs the extracted first characteristic data to the downstream apparatus, calculates the common video setting value based on the input second characteristic data, and outputs the calculated common video setting value to the downstream apparatus.

Abstract: A video display apparatus functions as a master which is to be connected in loop to other video display apparatus(s) functioning as slave(s) in order to configure a multi-display apparatus. The master video display apparatus includes an extracting unit configured to extract first characteristic data from a received video signal, a controller configured to generate a common video setting value and control a light source of an own apparatus based on the generated common video setting value, an input unit configured to input second characteristic data from the upstream apparatus, and a output unit configured to output the first characteristic data or the common video setting value to the downstream apparatus. The controller outputs the extracted first characteristic data to the downstream apparatus, calculates the common video setting value based on the input second characteristic data, and outputs the calculated common video setting value to the downstream apparatus.

Abstract: A video display device includes a light source, a rotating substrate, a light detection unit, a light valve, and a control section. The light detection unit detects intensity of first color light emitted from the wheel in a second period included in a first period and in a third period which is included in the first period and does not overlap with the second period, where the first period is a period equal to time during which light continuously enters a first region. The control section controls at least one of the wheel and the light valve based on the intensity of the first color light detected in the light detection unit.

Abstract: A projection image display apparatus of the present disclosure is provided with a plurality of light sources, a light combiner combining light rays emitted from the light sources, a light modulation element modulating light emitted from the light combiner, and a projection optical system projecting an image emitted from the light modulation element. The light sources are each controlled by pulse width modulation signals, and duty ratios of the pulse width modulation signals to the light sources differ from each other at least in a part of a set range of an amount of light combined by the light combiner.

Abstract: A video display device includes a light source, a rotating substrate, a light detection unit, a light valve, and a control section. The light detection unit detects intensity of first color light emitted from the wheel in a second period included in a first period and in a third period which is included in the first period and does not overlap with the second period, where the first period is a period equal to time during which light continuously enters a first region. The control section controls at least one of the wheel and the light valve based on the intensity of the first color light detected in the light detection unit.

Abstract: A first image separation section separates an image signal of a slave screen into right eye and left eye slave screen images. A second image separation section separates an image signal of a master screen into right eye and left eye master screen images. A first image position adjustment section adjusts a display position of the right eye slave screen image such that the right eye slave screen image shifts left by a predetermined amount and adjusts a display position of the left eye slave screen image such that the left eye slave screen image shifts right by a predetermined amount. First and second image combination sections combine the right eye slave screen image and the right eye master screen image to generate a right eye image and combine the left eye slave screen image and the left eye master screen image to generate a left eye image.

Abstract: A multi-display device for connecting projection screens of a plurality of image display devices so as to form one-screen image. Each of the image display devices includes a luminance lowering characteristic storage unit for storing a look-up table indicating average luminance lowering characteristic of a projection lamp, a timer unit for counting the lit time of lamp of the device, a lit time storage unit for accumulating and storing the lit time from the lamp use start moment, and an external communication unit for communicating.

Abstract: A multidisplay apparatus for distributing image signals for one screen to image display units, allowing the image display units to display a plurality of images side by side on the screen. The multidisplay apparatus includes a plurality of chromaticity adjustment units which respectively correspond to the plurality of image display units and each perform a calculation using signal values of one of the plurality of color image signals to be input to a corresponding image display unit and adjust the chromaticity of an image to be displayed by the corresponding image display unit for each of primary colors red, green, and blue, separately. This enables the images displayed by the image display units to have the same chromaticity, eliminates the color discontinuity between adjacent display images, and provides a sense of togetherness.

Abstract: A multi-display device for connecting projection screens of a plurality of image display devices so as to form one-screen image. Each of the image display devices includes a luminance lowering characteristic storage unit for storing a look-up table indicating average luminance lowering characteristic of a projection lamp, a timer unit for counting the lit time of lamp of the device, a lit time storage unit for accumulating and storing the lit time from the lamp use start moment, and an external communication unit for communicating.

Abstract: A multidisplay apparatus for distributing image signals for one screen to image display units, allowing the image display units to display a plurality of images side by side on the screen. The multidisplay apparatus includes a plurality of chromaticity adjustment units which respectively correspond to the plurality of image display units and each perform a calculation using signal values of one of the plurality of color image signals to be input to a corresponding image display unit and adjust the chromaticity of an image to be displayed by the corresponding image display unit for each of primary colors red, green, and blue, separately. This enables the images displayed by the image display units to have the same chromaticity, eliminates the color discontinuity between adjacent display images, and provides a sense of togetherness.