An apparatus and method for controlling power of a display device

A display device, equipment technology, applied in the direction of static indicators, nonlinear optics, instruments, etc.

Inactive Publication Date: 2007-01-10
LG ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, because the LED backlight is controlled by a single on / off switch, there are limitations to making brighter displays

Method used

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  • An apparatus and method for controlling power of a display device
  • An apparatus and method for controlling power of a display device
  • An apparatus and method for controlling power of a display device

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Embodiment Construction

[0019] Reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0020] figure 1 A block diagram showing a power control module in a display device according to the present invention. The power control module of the display device includes a power supply (10), a video signal analyzer (20), a controller (30), a power controller (40), a vertical grid driver (50), a horizontal drain driver (60), a backlight (70) and LCD (80).

[0021] The power supply (10) provides power to the vertical gate driver (50), the horizontal drain driver (60) and the backlight (70) via the power controller (40). A video signal analyzer (20) analyzes the contrast of the input video signal frame by frame. The controller (30) determines a backlight contrast adjustment value for each LED include...

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PUM

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Abstract

An apparatus and method for controlling power of a display device is disclosed. Dynamic contrast is widened by controlling contrasts of each LED in the backlight of the display device. The apparatus comprises a video signal analyzer, a liquid crystal display (LCD), vertical gate drivers and horizontal drain drivers, a backlight, a power controller, and a controller. By controlling each LED, clearer video signal, lower dissipating power, and lower heat can be achieved.

Description

[0001] This application claims the benefit of Korean Patent Application No. 10-2005-0059331 filed on Jul. 1, 2005, which is incorporated herein by reference. technical field [0002] The present invention relates to a power control module for a display device, and more particularly, to a power control device for a liquid crystal display (LCD). Background technique [0003] Liquid crystal display (LCD), which is a type of flat-panel display, has gained popularity as one of next-generation display devices for televisions, cellular phones, and monitors, along with plasma display panels (PDPs) and field emission displays (FEDs). reputation because they offer some real advantages over other display technologies. For example, they are thinner and lighter and draw much less power than cathode ray tubes (CRTs). LCD displays utilize two sheets of polarizing material with a liquid crystal solution in between. An electric current through the liquid causes the crystals to align so tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36G09G3/20G02F1/133
CPCG09G2320/066G09G2360/16G09G2330/021G09G3/3426G02F1/133
Inventor 禹钟镇
Owner LG ELECTRONICS INC
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