公开(公告)号：US20160078824A1

公开(公告)日：2016-03-17

申请号：US14726130

申请日：2015-05-29

Applicant: Pixtronix, Inc.

Inventor： James Chester Meador ,  Alan Gerald Lewis

IPC: G09G3/34

CPC classification number: G09G3/3433 ,  G09G3/3413 ,  G09G2300/0828 ,  G09G2310/0235 ,  G09G2310/0237 ,  G09G2310/08 ,  G09G2320/041 ,  G09G2330/021 ,  G09G2360/144 ,  H05B33/0815 ,  H05B33/0827

Abstract: This disclosure provides systems, methods and apparatus for powering display light sources. A display can include a DC/DC converter included in a power management integrated circuit (PMIC) to serve as the light source driver. Battery current drawn by the DC/DC converter can be smoothed, in part, by introducing a capacitor in parallel with the set of light sources. A display controller can control the DC/DC converter to output a substantially constant current for substantially the entirety of a time period for displaying a set of subframes, storing enough charge on the capacitor to support the current drawn through the light sources by a digital-to-analog converter included in the PMIC. Output current level for the DC/DC converter can be determined for the time period over which the subframes are displayed. The set of subframes can include subframes of a single image frame, or of one or more image frames.

Abstract translation: 本公开提供了用于为显示光源供电的系统，方法和装置。 显示器可以包括用作光源驱动器的功率管理集成电路（PMIC）中包括的DC / DC转换器。 由DC / DC转换器吸收的电池电流可以通过与该组光源并联引入电容器来平滑化。 显示控制器可以控制DC / DC转换器输出基本上恒定的电流，用于显示一组子帧，用于在电容器上存储足够的电荷以支持通过数字 - 包含在PMIC中的模拟转换器。 可以在显示子帧的时间段内确定DC / DC转换器的输出电流电平。 该组子帧可以包括单个图像帧或一个或多个图像帧的子帧。