公开(公告)号：US20090066378A1

公开(公告)日：2009-03-12

申请号：US11850931

申请日：2007-09-06

申请人： Chuan-Che Lee ,  Tsung-Yu WU ,  Yu-Jui Chang

发明人： Chuan-Che Lee ,  Tsung-Yu WU ,  Yu-Jui Chang

IPC分类号： G05F1/10 ,  H03L7/00

CPC分类号： G09G3/20 ,  G09G2310/027 ,  G09G2310/0297 ,  G09G2330/022 ,  H03K17/223

摘要： The present invention discloses a source driver and a method for restraining noise output by a source driver during power on/off of a power supply. The source driver includes a data bus, a plurality of channels, a multiplexer and a plurality of output pads. The channels are connected to the output pads via the multiplexer. Each channel has a latch unit. Data is transmitted on the data bus and stored in the latch units. The source driver is powered by a first supply voltage from the power supply. The method comprises determining whether the first supply voltage is insufficient, and if yes, performing the following steps. First, set the data transmitted on the data bus to be a predetermined value. Then, keep the latch units turned on, thereby the data is sent out from the latch units. Then, keep the multiplexer turned on for outputting a driving voltage based on the data via the output pads.

摘要翻译： 本发明公开了一种源极驱动器和一种用于在电源接通/断开期间抑制源极驱动器的噪声输出的方法。 源极驱动器包括数据总线，多个通道，多路复用器和多个输出焊盘。 通道通过多路复用器连接到输出焊盘。 每个通道都有一个锁存单元。 数据在数据总线上传输并存储在锁存单元中。 源极驱动器由电源的第一个电源供电。 该方法包括确定第一电源电压是否不足，如果是，则执行以下步骤。 首先，将在数据总线上发送的数据设置为预定值。 然后，保持锁存单元的开启，从锁存单元发出数据。 然后，保持多路复用器开启，通过输出焊盘输出基于数据的驱动电压。