VIDEO DISPLAY DEVICE
First Claim
1. A video display device having a liquid crystal panel, and a backlight with a plurality of backlight blocks horizontally and vertically arranged for projecting light onto the liquid crystal panel, capable of controlling the intensity of light for each of the backlight blocks, comprising:
- a receiving portion which receives a video signal to be displayed on the liquid crystal panel;
a scaler which performs a processing to change the size and/or position in a horizontal and/or vertical direction of the video signal received by the receiving portion;
a backlight controller which controls the intensity of light for each of the backlight blocks based on the video signal; and
a display controller which controls operation of the scaler,wherein the display controller controls the scaler to change the size and/or position in the horizontal and/or vertical direction of the video signal so as to nearly align a boundary between a video portion and a blank portion included in the video signal with a boundary between the backlight blocks, andwherein the backlight controller performs control to reduce the intensity of light of the backlight blocks in a position corresponding to the blank portion.
1 Assignment
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Accused Products
Abstract
A video display device is provided with a backlight for projecting light onto a display panel composed of plural backlight blocks two-dimensionally arranged, for controlling the intensity of light for each of the backlight blocks by local dimming control. In the video display device, video, such as letterbox video, having a black blank portion and a video portion is displayed so as to nearly align a boundary between the video portion and the blank portion with a boundary between the backlight blocks. Also, reduced display is performed using only a portion of the backlight blocks in both horizontal and vertical directions while nearly aligning the boundary between the video portion and the blank portion with the boundary between the backlight blocks.
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Citations
10 Claims
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1. A video display device having a liquid crystal panel, and a backlight with a plurality of backlight blocks horizontally and vertically arranged for projecting light onto the liquid crystal panel, capable of controlling the intensity of light for each of the backlight blocks, comprising:
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a receiving portion which receives a video signal to be displayed on the liquid crystal panel; a scaler which performs a processing to change the size and/or position in a horizontal and/or vertical direction of the video signal received by the receiving portion; a backlight controller which controls the intensity of light for each of the backlight blocks based on the video signal; and a display controller which controls operation of the scaler, wherein the display controller controls the scaler to change the size and/or position in the horizontal and/or vertical direction of the video signal so as to nearly align a boundary between a video portion and a blank portion included in the video signal with a boundary between the backlight blocks, and wherein the backlight controller performs control to reduce the intensity of light of the backlight blocks in a position corresponding to the blank portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification