公开(公告)号：US20090073156A1

公开(公告)日：2009-03-19

申请号：US12278411

申请日：2007-01-25

Applicant: Chistopher James Newton Fryer ,  Richard Guy Blakesley

Inventor： Chistopher James Newton Fryer ,  Richard Guy Blakesley

IPC: G09G3/30 ,  H02M7/42

CPC classification number: H05B33/08 ,  Y02B20/32

Abstract: A drive circuit for driving electroluminescent (EL) segments and polymer dispersed liquid crystal (PDLC) segment of a display. The circuit may include a flyback converter for generating an A.C. output voltage, a first switching circuit for selectively connecting the output voltage to the EL segments, and a second switching circuit for selectively connecting the output voltage to the PDLC segments. In order to drive the EL segments and PDLC segments at the required frequencies, the polarity of the output voltage applied to the PDLC segments is swapped at a frequency lower than the frequency at which the polarity of the output voltage is swapped for the EL segments. In this way, only a single high voltage power supply is required to drive both the EL and PDLC segments.

Abstract translation: 用于驱动显示器的电致发光（EL）段和聚合物分散液晶（PDLC）段的驱动电路。 电路可以包括用于产生交流输出电压的反激转换器，用于选择性地将输出电压连接到EL段的第一开关电路和用于选择性地将输出电压连接到PDLC段的第二开关电路。 为了驱动所需频率的EL段和PDLC段，施加到PDLC段的输出电压的极性以低于用于EL段的输出电压的极性交换的频率的频率交换。 以这种方式，只需要一个高压电源来驱动EL和PDLC段。

公开(公告)号：US20090153064A1

公开(公告)日：2009-06-18

申请号：US12303183

申请日：2007-06-01

Applicant: Chistopher James Newton Fryer

Inventor： Chistopher James Newton Fryer

IPC: H05B33/08 ,  G09G3/12

CPC classification number: H05B33/08 ,  G09G3/04 ,  G09G3/30 ,  Y02B20/32

Abstract: An electroluminescent circuit for driving an electroluminescent display having a plurality of segment electrodes and a common electrode. The circuit comprises a DC power supply, an output terminal for each of the segments and common electrodes and at least one supply half H-bridge for connecting at least one of each of the segment electrodes and the common electrode selectively to one of the DC supply and a reference voltage. Each supply half H-bridge comprises a top switch and a bottom switch in series having a junction between them. The top switch is connected to the DC supply and the bottom switch is connected to a reference voltage. A discharge circuit is provided for selectively discharging the electroluminescent display, the discharge circuit comprising a discharge half H-bridge in which a top switch is connected to the DC supply and to a discharge path.

Abstract translation: 一种用于驱动具有多个段电极和公共电极的电致发光显示器的电致发光电路。 该电路包括直流电源，用于每个段和公共电极的输出端子和用于将每个段电极和公共电极中的至少一个选择性地连接到DC电源中的一个的至少一个供电半H桥 和参考电压。 每个供电半H桥包括顶部开关和底部开关，它们之间具有连接。 顶部开关连接到直流电源，底部开关连接到参考电压。 提供了用于选择性地放电电致发光显示器的放电电路，放电电路包括放电半H桥，其中顶开关连接到DC电源和放电路径。