IEC 61747-4:20 12描述了LCD单元和无源矩阵单色液晶显示模块的基本额定值和特性。它不适用于有源矩阵LCD单元或多色单元。与上一版相比，此版本包括以下重大技术变更: -删除了IEC 61747-4:19 98的2.1和3.1，因为这些项目在IEC 61747-1中有定义； -IEC 61747-4:19 98的2.7补充信息中的2.7.6被删除，因为该标准的范围是关于无源矩阵单色液晶显示模块； -IEC 61747-4:19 98 2.3.1中的“灰度:数字或模拟”一项改为“灰度:数字”，因为它更准确； -对比度模式:在IEC 61747的这一部分中引入了暗背景上的亮符号（“LOD”或“正像”）或亮背景上的暗符号（“DOL”或“负像”），以取代2中的描述。IEC 61747-4:19 98的3.1和3.3.1。 本出版物应与IEC 61747-1:19 98一起阅读。

IEC 61747-4:2012 describes the essential ratings and characteristics of LCD cells and passive matrix monochrome liquid crystal display modules. It does not apply to active matrix LCD cells nor to multicolour cells. This edition includes the following significant technical changes with respect to the previous edition:
- 2.1 and 3.1 of IEC 61747-4:1998 were deleted because these items are defined in IEC 61747-1;
- 2.7.6, in 2.7, Supplementary information, of IEC 61747-4:1998 was deleted because the scope of this standard is about passive matrix monochrome liquid crystal display modules;
- The item "Gray scale: digital or analog" in 2.3.1 of IEC 61747-4:1998 was changed to "Gray scale: number" because it is more accurate;
- Contrast mode: light symbol on dark background ("LOD" or "positive image") or dark symbol on light background ("DOL" or "negative image") was introduced in this part of IEC 61747 to replace the description in 2.3.1 and 3.3.1 of IEC 61747-4:1998.

This publication is to be read in conjunction with IEC 61747-1:1998.