LIQUID CRYSTAL DISPLAY AND METHOD OF DRIVING THE SAME
First Claim
Patent Images
1. A liquid crystal display comprising:
- a liquid crystal display panel;
a backlight unit including a plurality of light sources, the backlight unit configured to provide light to the liquid crystal display panel;
a light source driving unit configured to drive the light sources of the backlight unit using a backlight control signal; and
a backlight controller configured to select a backlight dimming value depending on an input image and vary an off-start time of the backlight control signal based on the backlight dimming value.
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Abstract
A liquid crystal display includes a liquid crystal display panel, a backlight unit including a plurality of light sources, the backlight unit configured to provide light to the liquid crystal display panel, a light source driving unit configured to drive the light sources of the backlight unit using a backlight control signal, and a backlight controller configured to select a backlight dimming value depending on an input image and vary an off-start time of the backlight control signal based on the backlight dimming value.
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Citations
25 Claims
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1. A liquid crystal display comprising:
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a liquid crystal display panel; a backlight unit including a plurality of light sources, the backlight unit configured to provide light to the liquid crystal display panel; a light source driving unit configured to drive the light sources of the backlight unit using a backlight control signal; and a backlight controller configured to select a backlight dimming value depending on an input image and vary an off-start time of the backlight control signal based on the backlight dimming value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A liquid crystal display comprising:
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a liquid crystal display panel; a backlight unit including a plurality of light sources, the backlight unit configured to provide light to the liquid crystal display panel; a light source driving unit configured to drive the light sources of the backlight unit using a backlight control signal; and a backlight controller configured to detect a change in a backlight dimming value of consecutive input images and vary an off-start time of the backlight control signal based on the detected change in the backlight dimming value.
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17. A backlight controller, comprising:
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an input image analysis unit configured to select a frame representative value of an input image corresponding to one frame period; a dimming calculation unit configured to select a backlight dimming value based on the frame representative value; a scanning time determination unit configured to generate an off-start time data based on the backlight dimming value and vary the off-start time data depending on changes in the backlight dimming value; and a dimming controller configured to select a duty ratio of a backlight control signal based on the backlight dimming value and control a falling edge time of the backlight control signal.
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18. A method of driving a liquid crystal display, comprising:
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providing light to the liquid crystal display panel; driving light sources of a backlight unit using a backlight control signal; selecting a backlight dimming value depending on an input image; and varying an off-start time of the backlight control signal based on the backlight dimming value using a backlight controller. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A method of driving a liquid crystal display, comprising:
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providing light to the liquid crystal display panel; driving light sources of a backlight unit using a backlight control signal; selecting a backlight dimming value depending on an input image; and varying an off-start time of the backlight control signal based on a change in the backlight dimming value of consecutive input images using a backlight controller.
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Specification