DISPLAY APPARATUS AND DRIVING APPARATUS FOR DRIVING BACKLIGHT THEREOF
First Claim
1. A driving apparatus for driving a backlight provided in a display apparatus, the driving apparatus comprising:
- a switching unit which performs a switching operation to selectively supply driving power to the backlight in accordance with a driving signal;
a signal synthesizer which outputs a synthesized signal by synthesizing a current control signal which controls a level of a backlight current flowing in the backlight and a dimming signal which controls dimming of the backlight; and
a driver which generates the driving signal so that the backlight current flowing in the backlight reaches a predetermined target level based on the synthesized signal, outputs the driving signal to the switching unit, and controls the dimming of the backlight based on the synthesized signal.
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Abstract
A display apparatus is provided with a backlight and a driving apparatus for driving the backlight, the driving apparatus including: a switching unit which performs a switching operation to selectively supply driving power to the backlight in accordance with a driving signal; a signal synthesizer which outputs a synthesized signal by synthesizing a current control signal which controls a level of a backlight current flowing in the backlight and a dimming signal which controls dimming of the backlight; and a driver which generates the driving signal so that the backlight current flowing in the backlight reaches a predetermined target level based on the synthesized signal, outputs the driving signal to the switching unit, and controls the dimming of the backlight based on the synthesized signal.
36 Citations
20 Claims
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1. A driving apparatus for driving a backlight provided in a display apparatus, the driving apparatus comprising:
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a switching unit which performs a switching operation to selectively supply driving power to the backlight in accordance with a driving signal; a signal synthesizer which outputs a synthesized signal by synthesizing a current control signal which controls a level of a backlight current flowing in the backlight and a dimming signal which controls dimming of the backlight; and a driver which generates the driving signal so that the backlight current flowing in the backlight reaches a predetermined target level based on the synthesized signal, outputs the driving signal to the switching unit, and controls the dimming of the backlight based on the synthesized signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 20)
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10. A driving apparatus for driving a backlight provided in a display apparatus, the driving apparatus comprising:
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a switching unit which performs a switching operation to selectively supply driving power to the backlight in accordance with a driving signal; a signal synthesizer which outputs a synthesized signal by synthesizing a current control signal which controls a level of a backlight current flowing in the backlight and a protection signal which prevents an overcurrent from flowing in the backlight; and a driver which generates the driving signal so that the backlight current flowing in the backlight reaches a predetermined target level based on the synthesized signal, outputs the driving signal to the switching unit, controls the dimming of the backlight based on a dimming signal, and selectively cuts off the backlight current flowing in the backlight based on the synthesized signal. - View Dependent Claims (11, 12, 13, 14)
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15. A driving apparatus for driving a backlight provided in a display apparatus, the driving apparatus comprising:
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a switching unit which performs a switching operation to selectively supply driving power to the backlight in accordance with a driving signal; a signal synthesizer which outputs a synthesized signal by synthesizing a protection signal which prevents an overcurrent from flowing in the backlight and a dimming signal which controls dimming of the backlight; and a driver which generates the driving signal so that a backlight current flowing in the backlight reaches a predetermined target level, outputs the driving signal to the switching unit, and performs a dimming control for the backlight and a selective cutoff of the backlight current flowing in the backlight based on the synthesized signal. - View Dependent Claims (16)
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17. A display apparatus comprising:
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a signal receiver which receives a video signal; a signal processor which processes the video signal received in the signal receiver; a display unit which displays an image based on the video signal processed by the signal processor, and comprises a backlight for image displaying; and a driving circuit unit which drives the backlight, the driving circuit unit comprising; a switching unit which performs a switching operation to selectively supply driving power to the backlight in accordance with a driving signal; a signal synthesizer which outputs a synthesized signal by synthesizing a current control signal which controls a level of a backlight current flowing in the backlight and a dimming signal which controls dimming of the backlight; and a driver which generates the driving signal so that the backlight current flowing in the backlight reaches a predetermined target level based on the synthesized signal, outputs the driving signal to the switching unit, and controls the dimming of the backlight based on the synthesized signal.
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18. A display apparatus comprising:
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a signal receiver which receives a video signal; a signal processor which processes the video signal received in the signal receiver; a display unit which displays an image based on the video signal processed by the signal processor, and comprises a backlight for image displaying; and a driving circuit unit which drives the backlight, the driving circuit unit comprising; a switching unit which performs a switching operation to selectively supply driving power to the backlight in accordance with a driving signal; a signal synthesizer which outputs a synthesized signal by synthesizing a current control signal which controls a level of a backlight current flowing in the backlight and a protection signal which prevents an overcurrent from flowing in the backlight; and a driver which generates the driving signal so that the backlight current flowing in the backlight reaches a predetermined target level based on the synthesized signal, outputs the driving signal to the switching unit, controls the dimming of the backlight based on a dimming signal, and selectively cuts off the backlight current flowing in the backlight based on the synthesized signal.
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19. A display apparatus comprising:
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a signal receiver which receives a video signal; a signal processor which processes the video signal received in the signal receiver; a display unit which displays an image based on the video signal processed by the signal processor, and comprises a backlight for image displaying; and a driving circuit unit which drives the backlight, the driving circuit unit comprising; a switching unit which performs a switching operation to selectively supply driving power to the backlight in accordance with a driving signal; a signal synthesizer which outputs a synthesized signal by synthesizing a protection signal which prevents an overcurrent from flowing in the backlight and a dimming signal which controls dimming of the backlight; and a driver which generates the driving signal so that a backlight current flowing in the backlight reaches a predetermined target level, outputs the driving signal to the switching unit, and performs a dimming control for the backlight and a selective cutoff of the backlight current flowing in the backlight based on the synthesized signal.
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Specification