Appropriate illuminance judging unit
专利汇可以提供Appropriate illuminance judging unit专利检索，专利查询，专利分析的服务。并且PURPOSE: To quickly judge whether the illuminance to a work surface is appropriate for the aged or not by composing a judging unit with two pieces of identifying coloring matter having color in which chromaticity coordinates (xy chromaticity diagram of CIE) is surrounded with two straight lines of y = 2.25x - 0.555 and y = 2.25x - 0.205 and the distance between the chromaticity coordinates becomes 0.02 or more and 0.16 or less.
CONSTITUTION: An appropriate illuminance judging unit is set so that each xy chromaticity coordinate (xy chromaticity diagram of CIE) of two color chips can be surrounded with two straight lines of (y) = 2.25x - 0.555 and (y) = 2.25x - 0.205, and the distance between the mutual chromaticity coordinates can become 0.02 or more and 0.16 or less. A background color paper 1 and judging color chips 2 are arranged horizontal to a work surface discriminating color to be an object of judgment and an appropriate illuminance judging unit is placed. Then an aged operator is made to sit before the appropriate illuminance judging unit and to observe it for about five minutes, and then is requested to answer whether he can identify the two colors of the judging color chips or not. The sufficient illuminance of the work surface can be judged when the identification is made at that time.
COPYRIGHT: (C)1992,JPO&Japio，下面是Appropriate illuminance judging unit专利的具体信息内容。
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