Image display device and image display method
View Patent ↗An image display device includes an image display, an image separator and a controller. The image display displays a plurality of parallax images. The image separator performs optical separation such that the plurality of parallax images which are displayed are viewed as a stereoscopic image. The image separator includes a light-transmitting region (region 0 ), a light-masking region (region 1 ) and an intermediate region (region 2 ) which is located between the light-transmitting region (region 0 ) and the light-masking region (region 1 ). The controller controls light-transmittance of the intermediate region (region 2 ).
1. An image display device comprising:
an image display configured to display a plurality of parallax images;
an image separator configured to perform optical separation such that the plurality of parallax images which are displayed are viewed as a stereoscopic image, the image separator including a light-transmitting region, a light-masking region and an intermediate region which is located between the light-transmitting region and the light-masking region; and
a controller configured to control light-transmittance of the intermediate region, wherein
the light-transmitting region, the light-masking region, and the intermediate region are in a same plane as each other, the plane being parallel with a display surface of the image display,
the light-transmittance of the intermediate region is uniform,
the light-transmitting region, the light-masking region, and the intermediate region have predetermined widths such that a Moiré pattern occurring when the light-transmittance of the intermediate region is set to a first light-transmittance is a reverse of a Moiré pattern occurring when the light-transmittance of the intermediate region is set to a second light-transmittance, in terms of positions of dark areas and light areas, and
the controller sets the light-transmittance of the intermediate region to a light-transmittance that is between the first light-transmittance and the second light-transmittance and that is not the first light-transmittance or the second light-transmittance.
2. The image display device of claim 1 , wherein
the image separator includes a plurality of elongated aperture portions arranged in a striped pattern,
the intermediate region includes a group of sub-divisions located at one edge of each of the aperture portions in terms of a width direction thereof and a group of sub-divisions located at an opposite edge of each of the aperture portions in terms of the width direction thereof, and
each of the groups of sub-divisions consists of a plurality of sub-divisions which are arranged in a direction perpendicular to the width direction with intervals therebetween.
3. The image display device of claim 1 , wherein
the image separator includes a plurality of elongated aperture portions arranged in a slanted striped pattern, and
the intermediate region is provided in a slanted elongated shape at positions adjacent to each of two edges of each of the aperture portions in terms of a width direction thereof.
4. An image display device comprising:
an image display configured to display a plurality of parallax images;
an image separator configured to perform optical separation such that the plurality of parallax images which are displayed are viewed as a stereoscopic image, the image separator including a light-transmitting region, a light-masking region and an intermediate region which is located between the light-transmitting region and the light-masking region; and
a controller configured to control light-transmittance of the intermediate region, wherein
the light-transmitting region, the light-masking region, and the intermediate region are in a same plane as each other, the plane being parallel with a display surface of the image display,
the light-transmittance of the intermediate region is uniform,
the light-transmitting region, the light-masking region, and the intermediate region have predetermined widths such that a Moiré pattern occurring when the light-transmittance of the intermediate region is set to a first light-transmittance is a reverse of a Moiré pattern occurring when the light-transmittance of the intermediate region is set to a second light-transmittance, in terms of positions of dark areas and light areas, and
the controller controls the light-transmittance of the intermediate region by high-speed switching of a state of the intermediate region between a first state, in which the intermediate region has the first light-transmittance, and a second state, in which the intermediate region has the second light-transmittance.
5. The image display device of claim 4 , wherein
the first light-transmittance is 0% and the second light-transmittance is 100%, and
the controller performs the switching by alternately switching between the first state and the second state.
6. An image display device comprising:
an image display configured to display a plurality of parallax images;
an image separator configured to perform optical separation such that the plurality of parallax images which are displayed are viewed as a stereoscopic image, the image separator including a light-transmitting region, a light-masking region and an intermediate region which is located between the light-transmitting region and the light-masking region; and
a controller configured to control light-transmittance of the intermediate region, wherein
the light-transmitting region, the light-masking region, and the intermediate region are in a same plane as each other, the plane being parallel with a display surface of the image display,
the light-transmittance of the intermediate region is uniform,
the light-transmitting region, the light-masking region, and the intermediate region have predetermined widths such that a Moiré pattern occurring when the light-transmittance of the intermediate region is set to a first light-transmittance is a reverse of a Moiré pattern occurring when the light-transmittance of the intermediate region is set to a second light-transmittance, in terms of positions of dark areas and light areas,
the intermediate region includes:
a first region located at one edge of the light-transmitting region; and
a second region located at an opposite edge of the light-transmitting region, and
the controller controls the light-transmittance of the intermediate region by high-speed switching between a first state, in which light-transmittance R % of the first region satisfies 0≦R<100 and light-transmittance of the second region is 100%, and a second state, in which light-transmittance of the first region is 100% and light transmittance S % of the second region satisfies 0≦S<100.
7. The image display device of claim 6 , wherein
the image separator includes a plurality of elongated aperture portions arranged in a striped pattern,
the first region includes a group of sub-divisions located at one edge of each of the aperture portions in terms of a width direction thereof,
the second region includes a group of sub-divisions located at an opposite edge of each of the aperture portions in terms of the width direction thereof, and
each of the groups of sub-divisions consists of a plurality of sub-divisions which are arranged in a direction perpendicular to the width direction with intervals therebetween.
8. An image display method comprising:
a display step of causing a display to display a plurality of parallax images;
an image separation step of causing an image separator to perform optical separation such that the plurality of parallax images which are displayed are viewed as a stereoscopic image, the image separator including a light-transmitting region, a light-masking region and an intermediate region which is located between the light-transmitting region and the light-masking region; and
a control step of controlling light-transmittance of the intermediate region, wherein
the light-transmitting region, the light-masking region, and the intermediate region are in a same plane as each other, the plane being parallel with a display surface of the display,
the light-transmittance of the intermediate region is uniform,
the light-transmitting region, the light-masking region, and the intermediate region have predetermined widths such that a Moiré pattern occurring when the light-transmittance of the intermediate region is set to a first light-transmittance is a reverse of a Moiré pattern occurring when the light-transmittance of the intermediate region is set to a second light-transmittance, in terms of positions of dark areas and light areas, and
in the control step, the light-transmittance of the intermediate region is set to a light-transmittance that is between the first light-transmittance and the second light-transmittance and that is not the first light-transmittance or the second light-transmittance.