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Voltage generator, method of generating voltage, display device having the voltage generator and apparatus for driving the display device

A technology of a voltage generator and a display device, which can be applied to conversion equipment, instruments, static indicators, etc. without intermediate conversion to AC, and can solve problems such as unstable driving voltage, deterioration of operating characteristics and display quality, etc.

Inactive Publication Date: 2006-04-26
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Drive voltage becomes unstable due to output voltage fluctuations, deteriorating operating characteristics and display quality

Method used

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  • Voltage generator, method of generating voltage, display device having the voltage generator and apparatus for driving the display device
  • Voltage generator, method of generating voltage, display device having the voltage generator and apparatus for driving the display device
  • Voltage generator, method of generating voltage, display device having the voltage generator and apparatus for driving the display device

Examples

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Embodiment Construction

[0037] figure 1 is a block diagram showing a voltage generator according to an exemplary embodiment of the present invention.

[0038] refer to figure 1 , the voltage generator includes a first booster 110 , a second booster 120 , a current comparison part 140 and a switch control part 150 . figure 1 Also shown is a load 130 connected to the voltage generator.

[0039]The booster 110 boosts the input voltage VCC to a first boosted voltage 112 (eg, at line 112 ) in response to a first switch control signal SW_C1 , and applies the first boosted voltage 112 to a load 130 . The first boosted voltage 112 corresponds to a multiple of the input voltage VCC (m1, VCC×m1; here m1 is greater than 1). The current comparison part 140 compares the current corresponding to the first boosted voltage 112 with the reference current to apply the comparison result signal 142 to the switching control part 150 . The switch control part 150 applies the second switch control signal SW_C2 to the s...

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Abstract

A voltage generator includes a first booster and a second booster. The first voltage generator boosts the input voltage to generate a first boosted voltage applied to the load. The second booster generates a second boosted voltage that is applied to the load when the first boosted voltage is outside the critical range. When the first boosted voltage is applied to the load, the second boosted voltage is generated by the voltage generator. Therefore, the second boosted voltage can compensate the instability of the first boosted voltage.

Description

technical field [0001] The present invention relates to a voltage generator, a voltage generating method, a display device with the voltage generator and a device for driving the display device. More particularly, the present invention relates to a voltage generator capable of stabilizing an output voltage, a method of generating a stabilized voltage, a method having the voltage generator, and an apparatus for driving the display device. Background technique [0002] Generally, a power supply device of a liquid crystal display (LCD) module includes a DC to DC voltage converter (DC-DC converter), a DC / AC backlight inverter, and the like. The DC-DC converter converts the external DC voltage into a driving voltage of a logic circuit, a gate-on voltage VDD and a gate-off voltage VSS, a gamma reference voltage VREF for a data voltage, and a common voltage VCOM. Typically, logic circuits are driven at about 5V or less (eg, about 3.3V). [0003] According...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07G09G3/36
CPCH02M3/07G09G3/36
Inventor 明载勋柳会又郭珍午李圣昊
Owner SAMSUNG ELECTRONICS CO LTD
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