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Horizontal position control circuit for high-resolution LCD monitors

A technology of horizontal position and control circuit, which is applied to static indicators, cathode ray tube indicators, instruments, etc., and can solve problems such as difficult adjustment of the horizontal position of video signals

Inactive Publication Date: 2003-11-12
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, it is difficult to adjust the horizontal position of the video signal in the higher frequency range by conventional methods

Method used

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  • Horizontal position control circuit for high-resolution LCD monitors
  • Horizontal position control circuit for high-resolution LCD monitors
  • Horizontal position control circuit for high-resolution LCD monitors

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0018] refer to figure 1 , which shows an LCD monitor for use with a host system 100 such as a personal computer. The LCD monitor generally has an interface circuit 200 and an LCD driver circuit 320 . The interface circuit 200 connects the input video signal provided by the host system 100 to the LCD driving circuit 320 . The LCD driving circuit 320 drives the active matrix of the TFT-LCD panel 300 according to an input video signal.

[0019] The interface circuit 200 receives a video signal S100, which includes R, G, B analog video signals and horizontal and vertical synchronization signals. The interface circuit 200 converts an analog video signal input from the host system 100 into a digital video signal. These digital video signals and the controlled horizontal and vertical synchronization signals S200 are provided to the LCD driving circuit 320 . The interface circuit 200 and the LCD driving circuit 320 are integrated in a printed circuit board (PCB), and the PCB is m...

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Abstract

The invention provides a horizontal position control circuit for use in high-resolution LCD monitors. The horizontal position control circuit comprises a key pad for adjusting horizontal position of an image displayed, a key input controller for invoking a horizontal position control signal in response to input key signal, an analog-to-digital converter for dividing analog video signals by 2N (N=integers) and for converting the divided analog video signals into the corresponding digital video data, a frame memory for storing the digital video data output from the analog-to-digital converter, and a controller in response to the horizontal position control signal to adjust sampling point of the analog-to-digital converter so that the horizontal position is adjusted by unit pixel and adjusting output timing of write enable signals directed to the frame memory so that the horizontal position is adjusted by multiple pixels.

Description

technical field [0001] The present invention relates to an interface between a personal computer and a liquid crystal display (LCD) monitor, and more particularly to a horizontal position control circuit for a high resolution LCD monitor. Background technique [0002] Flat panel displays such as liquid crystal displays and plasma displays are considered as replacements for cathode ray tube (CRT) displays due to their compactness and low power consumption. Today, laptops and notebooks primarily use liquid crystal displays. Sometimes desktop computer systems also come with LCD monitors, although they are more expensive. Today's LCD panels use an active-matrix design, commonly known as a thin-film transistor (TFT) process. This type of LCD places a transistor on each pixel. The advantage of this active matrix design is that less current is required to pass through the horizontal and vertical grids, so that pixels can switch between switches more quickly. [0003] The LCD mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20G09G5/00
CPCG09G5/008G09G5/006G09G2340/0478G09G3/36
Inventor 成埈豪郑圣殷
Owner SAMSUNG ELECTRONICS CO LTD