dynamicContrastRatio(动态对比度)

Definition：This is the ratio of luminosity of the brightest and darkest colour the system is capable of producing simultaneously over time. In the attribute the integer given is the first number in the ratio which is always to one, i.e. 550:1.

定义：指系统能够随时间同时产生的最亮和最暗颜色的光度之比。在该属性中填写的整数是比率中的第一个数字，因为该比率总是与1相比，例如，550:1。

类型：ATTRIBUTE（属性）

Cardinality（基数）：0..1

字符长度：1..70

数据类型：nonNegativeInteger

BMS代码表ID：

xPath：/catalogue_item_notification:catalogueItemNotificationMessage/transaction/documentCommand/catalogue_item_notification:catalogueItemNotification/catalogueItem/tradeItem/tradeItemInformation/extension/*[namespace-uri()=’urn:gs1:gdsn:video_display_device_information:xsd:3’ and local-name()=’videoDisplayDeviceInformationModule’]/videoDisplayDeviceInformation/dynamicContrastRatio