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1. 发明申请

US20190191132A1 PROJECTION VIDEO DISPLAY APPARATUS 审中-公开
公开(公告)号：US20190191132A1
公开(公告)日：2019-06-20
申请号：US16323184
申请日：2016-08-05
申请人： MAXELL, LTD.
发明人： Shuhei KOBAYASHI , Kazuo SHIKITA , Akihiro SHIRAISHI , Naoya OKA
IPC分类号： H04N9/31
CPC分类号： H04N9/3155 , G09G3/20 , G09G3/34 , H04N5/74 , H04N9/31 , H04N9/3164 , H04N9/3182
摘要： A projection video display apparatus includes an input unit to input a video signal; a display to display the inputted video signal; a plurality of light sources to generate light; an illumination optical system to guide the generated light to the display; a projection optical system to project light via the display; and a controller to control the light sources, a lighting ratio and a current value per time for each light source. The controller has a black display control mode, for each light source, which makes a relative rate of a lighting ratio for a light source with a specific color smaller than the other light sources, and reduces the current value of the other light sources to be less than a current value of the light source with the specific color when compared with a case where the input video signal is a white signal.

2. 发明申请

US20230051479A1 VIDEO DISPLAY DEVICE AND PROJECTOR 有权
公开(公告)号：US20230051479A1
公开(公告)日：2023-02-16
申请号：US17767623
申请日：2019-10-10
申请人： Maxell, Ltd.
发明人： Hiroshi AOKI , Mitsuo NAKAJIMA , Satomi FURUHATA , Eriko YABE , Atsushi KATO , Naoya OKA
IPC分类号： H04N9/31 , G09G3/00
摘要： A video display device includes performs a first Retinex process on an inputted video and a second Retinex process, which is different from the first Retinex process, on the inputted video. A video composing unit is configured to compose a video processed by the first Retinex processing unit and a video processed by the second Retinex processing unit in accordance with a feature of the inputted video, which is then displayed. In a process of composing the video processed by the first and second Retinex processing units, the video composing unit is configured to perform a process of converting a luminance level for each pixel so that more output luminance levels are assigned to a luminance band having a large frequency distribution to improve visibility of the video. A gain of the luminance level converting process is varied in accordance with an average pixel value level of the inputted video.

3. 发明申请

US20190005917A1 VIDEO DISPLAY APPARATUS 审中-公开
公开(公告)号：US20190005917A1
公开(公告)日：2019-01-03
申请号：US16064805
申请日：2015-12-25
申请人： MAXELL, LTD.
发明人： Hiroyuki URATA , Yohei KATO , Naoya OKA
IPC分类号： G09G5/00
摘要： A technique for more suitable image output and the like for an own apparatus is provided with respect to communication among apparatuses in a system. A video display apparatus provided with an apparatus-apparatus communication interface holds own apparatus information. A video output apparatus is connected to a video input unit via a first apparatus-apparatus communication interface and a video output unit is connected to an external video display apparatus via a second apparatus-apparatus communication interface, external apparatus information is obtained from the external video display apparatus via the second apparatus-apparatus communication interface, and apparatus information is provided to the video output apparatus via the first apparatus-apparatus communication interface. A first mode for providing the apparatus information that contains a parameter value of the external apparatus information and a second mode for providing the apparatus information that gives priority to a parameter value of the own apparatus information are prepared.

4. 发明申请

US20170155880A1 PROJECTION-TYPE IMAGE DISPLAY DEVICE 有权
公开(公告)号：US20170155880A1
公开(公告)日：2017-06-01
申请号：US15322980
申请日：2014-07-04
申请人： Hitachi Maxell, Ltd.
发明人： Eriko NAGATA , Shinji ONODERA , Satomi MORISHITA , Naoya OKA , Masaaki IWANAGA
IPC分类号： H04N9/31 , G03B21/20 , G09G3/00 , G06T5/00 , H04N9/44
CPC分类号： H04N9/3191 , G03B21/2026 , G03B21/2053 , G06F3/0483 , G06T5/00 , G09G3/002 , G09G2320/0233 , G09G2320/045 , G09G2320/0626 , G09G2320/066 , G09G2320/0673 , G09G2320/08 , G09G2354/00 , H04N5/74 , H04N9/3155 , H04N9/3182 , H04N9/44 , H05B41/2928 , H05B41/3928
摘要： This projection-type image display device is provided with: a lamp drive unit that drives a lamp; a lamp voltage detection unit that detects a lamp interelectrode voltage (hereinafter referred to as a lamp voltage); an image correction unit that corrects image qualities of image signals to be supplied to an image display element; and a control unit that controls a correction quantity of the image correction unit on the basis of the lamp voltage detected by means of the lamp voltage detection unit. Consequently, deterioration of visibility of a projection image can be suitably suppressed.

5. 发明申请

US20220070421A1 PROJECTION TYPE VIDEO DISPLAY DEVICE 有权
公开(公告)号：US20220070421A1
公开(公告)日：2022-03-03
申请号：US17421212
申请日：2019-01-08
申请人： Maxell, Ltd.
发明人： Eriko NAGATA , Naoya OKA , Kenichi IWAHARA
IPC分类号： H04N9/31 , G03B21/20
摘要： A projection type video display apparatus is configured to include a projection optical system, an image processor, and a controller. The controller is configured to control the image processor to perform a blending process for partially changing the brightness of projection videos. The controller is configured to perform control to set a mode of the projection type video display apparatus to a blending adjustment mode in which a user adjusts the blending process performed by the image processor. In the blending adjustment mode, the controller is configured to perform control to generate a menu image of the blending adjustment menu and display the menu image in the projection video. In the blending adjustment mode, the controller automatically changes a display position of the blending adjustment menu according to a position of a blending adjustment region that is a region to be adjusted by the blending process.

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