公开(公告)号：EP1341150A1

公开(公告)日：2003-09-03

申请号：EP02425109.2

申请日：2002-02-28

Applicant: STMicroelectronics S.r.l. ,  Dora S.p.A.

Inventor： Rodeschini, Luca ,  Sala, Leonardo ,  Gariboldi, Roberto

IPC: G09G3/36

CPC classification number: G09G3/3625 ,  G09G3/2014 ,  G09G3/3622 ,  G09G2330/021

Abstract: Herein described is a driving method for LCD modules having a multiplicity of display elements placed in the intersections of a matrix having a plurality of row electrodes and a plurality of column electrodes. The method comprises a first phase for scanning all the row electrodes of said matrix in an interval of scanning time (NT). The first phase comprises a second phase comprising the generation of a first signal suited to energizing at least one row electrode of the matrix for a first preset interval of time (T), the generation of second signals (C3(t), C5(t)) suited to energizing respectively each column electrode of said matrix simultaneously with the energizing of at least one row electrode. The second signals (C3(t), C5(t)) are suited to determining the grey level of each display element of at least one row electrode energized by means of an alternance of corresponding values distinct signal levels (Von, Voff, V1-V3) for intervals of time (T1on, T1off) comprised in the first preset interval of time (T) by means of a first PWM modulation. The first preset interval of time (T) is lower than the interval of scanning time (NT). The first phase comprises a third phase successive to the second phase and comprising the generation of another first signal suited to energizing at least another row electrode of said matrix for a second preset period of time (T) equal and successive to the first preset interval of time, the generation of third signals (C3(t), C5(t)) suited to energizing each column electrode of the matrix simultaneously to said at least another row electrode; the third signals are suited to determining the grey level of each display element of at least another row electrode energized by means of an altemance of values corresponding to said distinct signal levels (Von, Voff, V1-V3) for intervals of time (T2on, T2off) comprised in said second preset interval of time (T) by means of a second PWM modulation. The second PWM modulation is such to ensure the continuity of the signal level of said second signals (C3(t), C5(t)) and third signals (C3(t), C5(t)) in the passage from the first preset period of time (T) to the second preset period of time (T). (Figure 5).

Abstract translation: 快来描述的是一种用于驱动具有在具有电极行的多个部分并加以电极柱的多个A矩阵的交叉点放置显示元件的多个液晶显示模块的方法。 该方法包括在扫描时间（NT）间隔扫描电极与上述矩阵的所有行中的第一阶段。 所述第一相包含第二相，其包括适合于激励所述矩阵的至少一个行电极对的时间（T）的第一预设间隔的第一信号的产生，第二信号（C 3（t）的，C5（T的产生 ））适合于分别与至少一个行电极的通电同时激励所述矩阵的每一列电极。 第二信号（C 3（t）的，C5（t））的适合于所确定的采矿由对应值的alternance手段通电的至少一个行电极的每个显示元件的灰度级不同信号电平（从，V关闭，V1 V3）为在时间（T）由第一PWM调制手段的第一预设间隔由时间（T1ON，T1off）区间。 时间的第一预设时间间隔（T）比的扫描时间（NT）的时间间隔低。 所述第一相包含第三相连续的第二相和包含至少适合于激励所述矩阵的另一行电极的时间（T）相等，并且连续到的所述第一预定间隔的第二预设时间段的另一第一信号的生成 时间，（C 3（t）的，C5（t））的适合于同时激励所述矩阵的每一列电极到所述至少另一行电极产生第三信号的; 第三信号适合于所确定的采矿由对应于所述不同信号电平值的altemance手段（通电至少另一行电极的每个显示元件的灰度级（从，V关闭，V1-V3），用于时间T2ON的间隔， T2off）由第二PWM调制的机构，在上述由时间（T）的第二预设时间间隔。 第二PWM调制正在寻求确保的信号电平的连续性，所述第二信号（C3（t）的，C5（t））和第三信号（C3（t）的，C5（T））在从所述第一预设通道 的时间周期（T）时间的第二预设时间段（T）。 （图5）。