Driving circuit having counter and liquid crystal display employing same
First Claim
1. A driving circuit for a liquid crystal display (LCD), comprising:
- a power supply circuit, configured for providing voltages to the LCD;
a backlight control circuit, configured for controlling whether or not the voltages provided by the power supply circuit are transferred to a backlight module of the LCD; and
a counter configured for counting a number of pulses received from an external circuit, wherein when the number of pulses received reaches a predetermined threshold number, the counter provides a trigger signal to turn on the backlight control circuit so that the voltages provided by the power supply are transferred to the backlight module.
3 Assignments
0 Petitions
Accused Products
Abstract
An exemplary driving circuit for a liquid crystal display (3) includes a power supply circuit (34), a backlight control circuit (356) and a counter (355). The power supply circuit provides voltages for the LCD. The backlight control circuit controls whether or not the voltages provided by the power supply circuit are transferred to a backlight module of the LCD. The counter is configured for counting a number of pulses received from an external circuit, when the number of pulses received reaches a predetermined threshold number, the counter provides a trigger signal to turn on the backlight control circuit, so that the voltages provided by the power supply are transferred to the backlight module.
12 Citations
19 Claims
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1. A driving circuit for a liquid crystal display (LCD), comprising:
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a power supply circuit, configured for providing voltages to the LCD;
a backlight control circuit, configured for controlling whether or not the voltages provided by the power supply circuit are transferred to a backlight module of the LCD; and
a counter configured for counting a number of pulses received from an external circuit, wherein when the number of pulses received reaches a predetermined threshold number, the counter provides a trigger signal to turn on the backlight control circuit so that the voltages provided by the power supply are transferred to the backlight module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A liquid crystal display (LCD), comprising:
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a liquid crystal panel;
a backlight module positioned for illuminating the liquid crystal panel; and
a driving circuit configured for providing voltages for the backlight module and the liquid crystal panel, the driving circuit comprising;
a power supply circuit, configured for providing voltages for the LCD;
a backlight control circuit, configured for controlling whether or not the voltages provided by the power supply are transferred to a backlight module of the LCD; and
a counter configured for counting a number of pulses received from an external circuit, wherein when the number of pulses received reaches a predetermined threshold number, the counter provides a trigger signal to turn on the backlight control circuit, so that the voltages provided by the power supply are transferred to the backlight module. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of providing driving circuit for a liquid crystal display (LCD), comprising:
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providing a power supply circuit configured for providing voltages to the LCD;
providing a backlight control circuit configured for controlling whether or not the voltages provided by the power supply circuit are transferred to a backlight module of the LCD; and
providing a counter configured for counting a number of pulses received from an external circuit, wherein when the number of pulses received reaches a predetermined threshold number, the counter provides a trigger signal to turn on the backlight control circuit so that the voltages provided by the power supply are transferred to the backlight module.
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Specification