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Source driver and receiver thereof

A source driver and receiver technology, applied to instruments, static indicators, etc., can solve the problem of amplified voltage signal becoming smaller, so as to save current and avoid prolonged wake-up time

Active Publication Date: 2014-05-28
RAYDIUM SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the normal working mode, the receiver 1 of the conventional source driver will cause the amplified voltage signal Vop output by the dual-stage operational amplifier 10 due to the on-resistance of the additional transistor switch MN5. The amplitude (swing) value becomes smaller

Method used

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  • Source driver and receiver thereof
  • Source driver and receiver thereof
  • Source driver and receiver thereof

Examples

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Embodiment Construction

[0035] The first embodiment according to the present invention is a source driver. In this embodiment, the source driver is used in a liquid crystal display device for driving the source, but it is not limited thereto.

[0036] Please refer to figure 2 , figure 2 is a functional block diagram illustrating the receiver of the source driver disclosed in the present invention. Such as figure 2 As shown, the receiver 2 of the source driver includes a dual-stage amplifier 20 , a buffer 22 , a current input 24 , a first voltage input 26 , a second voltage input 28 and a voltage output 30 . Wherein, the dual-stage amplifier 20 and the buffer 22 are coupled to each other; the current input terminal 24, the first voltage input terminal 26 and the second voltage input terminal 28 are all coupled to the dual-stage amplifier 20; the buffer 22 is coupled to the voltage output terminal 30 .

[0037] In fact, the two-stage amplifier 20 can be a two-stage operational amplifier (two-st...

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PUM

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Abstract

A source driver and a receiver thereof are disclosed. A two-stage amplifier of the receiver includes a first-stage circuit and a second-stage circuit. The second-stage circuit includes a first switch, a second switch, a third switch, a first node, and a second node. The first switch is coupled between the first node and a ground end; the second switch is coupled between the second node and the ground end; the third switch is coupled between the first node and the second node. When the receiver wants to wake up from a power-saving mode to a normal operation mode, the first switch and the second switch are switched to the off-state according to a control signal at first; after a period of delay time, the third switch is also switched to the off-state according to a delayed control signal.

Description

technical field [0001] The present invention relates to a liquid crystal display device, in particular to a source driver and its receiver applied to a liquid crystal display device. The two transistors are coupled, and a switch controlled by a delay control signal is set between the two nodes, thereby achieving the purpose of saving current without prolonging the wake-up time. Background technique [0002] Generally speaking, a source driver of a liquid crystal display device includes a plurality of receivers connected in series. When one of the receivers receives the start signal, it means that it is the receiver's turn to receive the grayscale data. For the sake of saving power, other receivers that do not receive grayscale data are usually put into a power saving mode. When the receiving of the grayscale data by the receiver is about to come to an end, the receiver will output a wake-up signal to the next receiver to wake up from the power saving mode and prepare to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/3685G09G2330/021
Inventor 黄仁锋苗蕙雯左克扬
Owner RAYDIUM SEMICON