Image display device
First Claim
Patent Images
1. An image display device comprising:
- a light source;
a screen which is irradiated with light from the light source to form an image;
an optical system that generates a virtual image with the light from the screen;
a screen driving mechanism unit that moves the screen in an optical axis direction of the light emitted from the light source;
a memory unit in which screen driving waveform information is stored, the screen driving waveform information being generated such that the screen follows a smoothed movement profile, the smoothed movement profile being obtained by smoothing a movement profile so as to make a moving speed of the screen vary, the movement profile being used as a target for moving the screen; and
a screen driving circuit unit that drives the screen driving mechanism unit, based on the screen driving waveform information stored in the memory unit,wherein the smoothed movement profile is obtained by smoothing the movement profile with a simple moving average method or a weighted moving average method.
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Accused Products
Abstract
An image display device includes a light source, a screen, an optical system, a screen driving mechanism unit, a memory unit, and a screen driving circuit unit. An image is formed on the screen by being irradiated with light from the light source. The screen driving mechanism unit moves the screen in an optical axis direction of the light. A smoothed movement profile is obtained by smoothing a movement profile used as a target for moving the screen so as to make a moving speed of the screen vary gently. The memory unit stores screen driving waveform information that has been generated so that the screen follows the smoothed movement profile. The screen driving circuit unit drives the screen driving mechanism unit, based on the screen driving waveform information stored in the memory unit.
2 Citations
8 Claims
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1. An image display device comprising:
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a light source; a screen which is irradiated with light from the light source to form an image; an optical system that generates a virtual image with the light from the screen; a screen driving mechanism unit that moves the screen in an optical axis direction of the light emitted from the light source; a memory unit in which screen driving waveform information is stored, the screen driving waveform information being generated such that the screen follows a smoothed movement profile, the smoothed movement profile being obtained by smoothing a movement profile so as to make a moving speed of the screen vary, the movement profile being used as a target for moving the screen; and a screen driving circuit unit that drives the screen driving mechanism unit, based on the screen driving waveform information stored in the memory unit, wherein the smoothed movement profile is obtained by smoothing the movement profile with a simple moving average method or a weighted moving average method. - View Dependent Claims (2, 3, 4)
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5. An image display device comprising:
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a light source; a screen which is irradiated with light from the light source to form an image; an optical system that generates a virtual image with the light from the screen; a screen driving mechanism unit that moves the screen in an optical axis direction of the light emitted from the light source; a memory unit in which screen driving waveform information is stored, the screen driving waveform information being generated such that the screen follows a movement profile, the movement profile being used as a target for moving the screen; and a screen driving circuit unit that drives the screen driving mechanism unit, based on the screen driving waveform information stored in the memory unit, wherein the screen driving waveform information is generated based on a motional property of the screen driving mechanism unit and is current waveform information of a screen drive for use in driving the screen. - View Dependent Claims (6)
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7. An image display device comprising:
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a light source; a screen which is irradiated with light from the light source to form an image; an optical system that generates a virtual image with the light from the screen; a screen driving mechanism unit that moves the screen in an optical axis direction of the light emitted from the light source; a memory unit in which screen driving waveform information is stored, the screen driving waveform information being generated such that the screen follows a movement profile, the movement profile being used as a target for moving the screen; and a screen driving circuit unit that drives the screen driving mechanism unit, based on the screen driving waveform information stored in the memory unit, wherein the screen driving waveform information is generated based on a motional property of the screen driving mechanism unit and is voltage waveform information of a screen drive for use in driving the screen. - View Dependent Claims (8)
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Specification
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Current AssigneePanasonic Automotive Systems Company of America (Panasonic Holdings Corporation)
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Original AssigneePanasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
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InventorsUragami, Susumu, Furuya, Hiroyuki, Shiramizu, Takahisa, Kurozuka, Akira, Yamamoto, Yuta
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Primary Examiner(s)TEITELBAUM, MICHAEL E
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Application NumberUS15/426,041Publication NumberTime in Patent Office379 DaysField of SearchUS Class CurrentCPC Class CodesG02B 2027/0127 comprising devices increasi...G02B 2027/0145 creating an intermediate imageG02B 27/01 Head-up displaysG02B 27/0101 characterised by optical fe...H04N 9/3129 scanning a light beam on th...H04N 9/3185 Geometric adjustment, e.g. ...
