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Voltage generator for flat panel display

A technology for voltage generators and flat-panel displays, applied in static indicators, instruments, etc., can solve the problems of LCD image quality degradation, gray-scale voltage fluctuations, etc.

Inactive Publication Date: 2007-01-17
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the power consumption provided by the driving voltage increases during LCD operation, undesired fluctuations occur in the reference voltage (VREF) used to generate the gray scale voltage VGM
This kind of fluctuation is easy to cause the fluctuation of grayscale voltage, which causes the deterioration of LCD image quality

Method used

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  • Voltage generator for flat panel display
  • Voltage generator for flat panel display
  • Voltage generator for flat panel display

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Embodiment Construction

[0010] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. However, the embodiments herein are illustrative and should not be construed as restrictive, and are presented in order to make the scope and spirit of the present invention readily understood.

[0011] figure 1 is a block diagram showing the structure of a flat panel display such as an LCD. refer to figure 1 , the LCD 100 includes a liquid crystal panel 110 , a timing controller 120 , a source driver 130 , a gate driver 140 and a voltage generator 150 . The liquid crystal panel 110 includes: a plurality of gate lines; a plurality of data lines perpendicularly crossing the plurality of gate lines; a plurality of pixels defined by intersections of the gate lines and the data lines. Typically, a plurality of pixels are arranged in a matrix structure. Each pixel includes: a thin film transistor, the gate electrode a...

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Abstract

A voltage generator for a flat panel display is provided. It includes a bandgap reference voltage generator configured to generate a reference voltage responsive to a received power voltage, and a gray scale voltage generator configured to receive the reference voltage from the bandgap reference voltage generator and to generate a gray scale voltage responsive to the reference voltage. Because the bandgap reference voltage generator is not influenced by external voltage fluctuations or by variations in temperature, a stable reference voltage can be generated, and a stable gray scale voltage can be obtained.

Description

technical field [0001] The present invention relates to a display, and more particularly to a voltage generator circuit for a flat panel display. Background technique [0002] Visual displays on electronic devices are a popular and often necessary user interface. A flat panel display having a slim profile and light weight is widely used in small electronic devices. In addition to being very useful for applications involving portable and small electronic devices, the space-saving, light-weight, and power-saving features of flat-panel displays make flat-panel displays ideal for use in larger user applications including, for example, computer monitors or television display units. interface. In general, flat panel displays can be classified according to the type of image display panel employed, including organic light-emitting diode displays (OLEDs), liquid crystal displays (LCDs), field emission displays (FEDs), vacuum fluorescent displays (VFDs), and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G09G3/36G02F1/133
CPCG09G3/20G09G3/3696G09G3/36
Inventor 崔大成
Owner SAMSUNG ELECTRONICS CO LTD