Image display apparatus and control method therefor
AssigneeCanon Kabushiki Kaisha
InventorMitsuru Tada
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Abstract
An image display apparatus according this invention includes: a light-emitting unit configured to emit light; a display panel configured to display an image by transmitting the light from the light-emitting unit at a transmittance based on an input image signal; and a control unit configured to set a plurality of lighting periods respectively having different lengths on a frame-by-frame basis and control lighting and extinction of the light-emitting unit in such a manner that the light-emitting unit is lit during the lighting periods and extinguished during a period other than the lighting periods, wherein the control unit makes the number of lighting periods within one frame larger when a brightness of the image is bright than when the brightness of the image is dark.
Claims26
An image display apparatus comprising:
- a light-emitting unit configured to emit light;
- a display panel configured to display an image by transmitting the light from the light-emitting unit at a transmittance based on an input image signal;
- and
- a control unit configured to set a plurality of lighting periods respectively having different lengths on a frame-by-frame basis and control lighting and extinction of the light-emitting unit in such a manner that the light-emitting unit is lit during the lighting periods and extinguished during a period other than the lighting periods,
- wherein the control unit makes the number of lighting periods within one frame larger when a brightness of the image is bright than when the brightness of the image is dark.
A method of controlling an image display apparatus having a light-emitting unit configured to emit light and a display panel configured to display an image by transmitting the light from the light-emitting unit at a transmittance based on an input image signal, the method comprising:
- a set step of setting a plurality of lighting periods respectively having different lengths on a frame-by-frame basis;
- and
- a control step of controlling lighting and extinction of the light-emitting unit in such a manner that the light-emitting unit is lit during the lighting periods and extinguished during a period other than the lighting periods,
- wherein in the set step, the number of lighting periods within one frame is made larger when a brightness of the image is bright than when the brightness of the image is dark.
Dependencies are inferred from the claim text.