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Drive device and amplifier device with low power consumption and display device

A driver and display technology, applied in the direction of static indicators, instruments, etc.

Active Publication Date: 2012-09-05
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned source driver device 100 cannot ideally meet all the above design constraints, especially the power consumption

Method used

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  • Drive device and amplifier device with low power consumption and display device
  • Drive device and amplifier device with low power consumption and display device
  • Drive device and amplifier device with low power consumption and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] figure 2 is a schematic diagram of an example source driver device according to an embodiment. exist figure 2 Among them, a source driver device 200 may be configured to drive a display panel (not shown), and may include an output buffer circuit 202 and a switching circuit 204 .

[0044] The output buffer circuit 202 may include a first amplifier device 210 and a second amplifier device 220 . The first amplifier device 210 may be configured to receive a first input signal SI1 output by a D / A converter (not shown), and provide a first output signal SO1 at a first output node O1 to be output at a first output The display panel is driven in the driving range (ie, the voltage range of the first output signal SO1). Similarly, the second amplifier means 220 may be configured to receive the second input signal SI2 output by the D / A converter, and provide the second output signal SO2 at a second output node O2 for driving at the second output The display panel is dr...

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PUM

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Abstract

The invention discloses a drive device and an amplifier device with low power consumption and a display device. An output buffer circuit of the drive circuit is used for a display. The amplifier device comprises a first amplifier circuit and a second amplifier circuit, wherein the first amplifier circuit comprise a first input stage which is coupled between a higher power supply and a lower powersupply as well as a first output stage which is coupled between the higher power supply and a first intermediate power supply; the first intermediate power supply is higher than the lower power supply; the second amplifier circuit comprises a second input stage which is coupled between the higher power supply and the lower power supply as well as a second input stage which is coupled between a second intermediate power supply and the lower power supply, wherein the second intermediate power supply is lower than the higher power supply.

Description

technical field [0001] Embodiments described herein relate to a display device, and more particularly, to an output buffer circuit of a driver device, an amplifier device, and a display device using the output buffer circuit. Background technique [0002] Generally speaking, under the development of precise, lightweight, low-power and high-quality display devices, the demand for liquid crystal display (LCD) devices with low power consumption, high speed, high resolution, and large output range is and increasing day by day. An LCD driver generally consists of a source driver, a gate driver, a controller, and a reference power supply. To meet the above requirements, these source drivers play a particularly important role, and these source drivers include registers, data latches, digital-to-analog converters (Digital-to-Analog Converters; DACs), and output buffers. Among other things, these output buffers determine the source driver's speed, resolution, voltage range, and pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20
Inventor 张进添李敬中
Owner HIMAX TECH LTD