Electronic desk calculator
专利汇可以提供Electronic desk calculator专利检索，专利查询，专利分析的服务。并且PURPOSE: To execute a calculation with seeing a calculating expression and each key of a keyboard by the almost same sight line, by making the keyboard transparent or translucent, and placing the keyboard of an electronic desk calculator in the vicinity of the calculating expression or on its expression.
CONSTITUTION: A movable contact substrate 11 made of a polyester film, a fixed contact substrate 13 made of glass, and a housing 16 made of acryl can obtain a transmissivity of >90%, respectively, and a movable contact 12 made of a thin film metal and a wiring board 14 can obtain a transmissivity of 80W90% according to a vapor-depositing method. When seeing from the operating surface of a keyboard, a transmissivity of >60W70% is obtained as a whole. A spacer 15 and a character display 17 are considered as an obstructing factor of a transparency, but the spacer 15 is scarcely conspicuous with the naked eye since the diameter is extremely small. The character display 17 is about 5W10% by an area ratio of the whole keyboard part, and enough for a fact that the calculating expression is seen through the keyboard.
COPYRIGHT: (C)1986,JPO&Japio，下面是Electronic desk calculator专利的具体信息内容。
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