公开(公告)号：US20150235606A1

公开(公告)日：2015-08-20

申请号：US14571248

申请日：2014-12-15

Applicant: Silicon Laboratories Inc.

Inventor： Douglas Piasecki ,  Thomas Saroshan David ,  Timothy T. Rueger ,  Stefan Mastovich ,  Jia-Hau Liu

IPC: G09G3/36 ,  G09G5/18

CPC classification number: G09G3/3696 ,  G06F3/0412 ,  G06F3/044 ,  G09G3/18 ,  G09G3/3611 ,  G09G5/18 ,  G09G2310/0278 ,  G09G2330/02 ,  G09G2330/021 ,  G09G2330/022

Abstract: An LCD controller includes a charge pump circuit for generating a charge voltage responsive to an external voltage and a clock signal. An oscillator generates the clock signal responsive to at least one bias voltage. The oscillator has a high power mode of operation and a low power mode of operation. Bias circuitry for applies the at least one bias voltage to the oscillator. The at least one bias voltage is applied to the oscillator from an external source in the high power mode of operation and the at least one bias voltage is applied to the oscillator from a source within the oscillator in the low power mode of operation. An LCD driver voltage circuit generates a plurality of LCD driver voltages for driving segments of an LCD display responsive to the charge voltage.

Abstract translation: LCD控制器包括用于产生响应于外部电压和时钟信号的充电电压的电荷泵电路。 振荡器响应于至少一个偏置电压产生时钟信号。 振荡器具有高功率工作模式和低功耗工作模式。 用于将至少一个偏置电压施加到振荡器的偏置电路。 在高功率工作模式下，至少一个偏置电压从外部源施加到振荡器，并且至少一个偏置电压在低功耗工作模式下从振荡器内的源施加到振荡器。 LCD驱动器电压电路响应于充电电压产生用于驱动LCD显示器段的多个LCD驱动器电压。