公开(公告)号：WO2011084188A1

公开(公告)日：2011-07-14

申请号：PCT/US2010/047311

申请日：2010-08-31

Applicant: APPLE INC. ,  THOMPSON, Paul M. ,  KIM, Floriano ,  YOSHIMOTO, Mark A.

Inventor： THOMPSON, Paul M. ,  KIM, Floriano ,  YOSHIMOTO, Mark A.

IPC: G09G3/34

CPC classification number: G09G3/342 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/0633 ,  G09G2320/064 ,  H05B33/0818 ,  Y02B20/346

Abstract: A method and system for modifying the pulse width modulation frequency for controlling the backlit illumination intensity of a liquid crystal display (14). The modified pulse width modulation frequency may be selected to reduce distortion in the display (14) while allowing for a wide range of dimming settings for the display (14). A pulse width modulation signal (95) may be also be phase shifted such that a string of light sources (110-115) may be sequentially activated to generate a effective frequency greater than that of the frequency of the pulse width modulation signal (95).

Abstract translation: 一种用于修改用于控制液晶显示器（14）的背光照明强度的脉宽调制频率的方法和系统。 可以选择修改的脉冲宽度调制频率以减少显示器（14）中的失真，同时允许显示器（14）的宽范围的调光设置。 脉冲宽度调制信号（95）也可以被相移，使得一束光源（110-115）可以顺序地被激活以产生大于脉宽调制信号（95）的频率的有效频率， 。

公开(公告)号：EP2522007A1

公开(公告)日：2012-11-14

申请号：EP10757128.3

申请日：2010-08-31

Applicant: APPLE INC.

Inventor： THOMPSON, Paul M. ,  KIM, Floriano ,  YOSHIMOTO, Mark A.

IPC: G09G3/34

CPC classification number: G09G3/342 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/0633 ,  G09G2320/064 ,  H05B33/0818 ,  Y02B20/346

Abstract: A method and system for modifying the pulse width modulation frequency for controlling the backlit illumination intensity of a liquid crystal display (14). The modified pulse width modulation frequency may be selected to reduce distortion in the display (14) while allowing for a wide range of dimming settings for the display (14). A pulse width modulation signal (95) may be also be phase shifted such that a string of light sources (110-115) may be sequentially activated to generate a effective frequency greater than that of the frequency of the pulse width modulation signal (95).