Image display device
View Patent ↗An image display device includes a plurality solid-state light sources, a modulator configured to modulate light from a plurality of solid-state light sources, and an image display device configured to generate from a frame of image data, a plurality of subframes each further divided into subfields, and to display the plurality of subframes. The modulator turns off light output from all the solid-state light sources for the duration of one or more of the plurality of subframes, whereby it is possible to reduce motion blur arising from a hold-type display device, in which after-images remain on the retina of a person's eyes when viewing moving objects.
1. An image display device for projecting and displaying an image on a screen, the device comprising:
a plurality of solid-state light sources;
a light-source drive controller configured to, in each of consecutive subframes included in a period of each frame and when displaying moving images by changing images on a frame-by-frame basis, control driving of the plurality of solid-state light sources and turn on the plurality of solid-state light sources in accordance with a plurality of subfields of each of the subframes; and
an image display portion configured to display the subframes on the screen during a period of the consecutive subframes, by modulating light emitted from the plurality of solid-state light sources based on image data of the frame; wherein
the light-source drive controller is configured to turn off all the plurality of solid-state light sources during a black period which is other than the period of the consecutive subframes and which is inserted before or after the period of the consecutive subframes in the period of each of the frames.
2. The image display device according to claim 1 , wherein the black period is inserted in the beginning or end of the period of each of the frames.
3. The image display device according to claim 2 , wherein a length of the black period corresponds to a length of a predetermined number of two or more of the subframes.
4. The image display device according to claim 1 , wherein the length of the black period is changeable in accordance with the type of content and operating environment of the image display device.
5. The image display device according to claim 1 , wherein a length of the black period corresponds to a length of the subframe.
6. The image display device according to claim 1 , wherein a length of the black period is 10 to 30% of the period of the frame.