发明名称 |
Single plane optical membrane switch and keyboard |
摘要 |
Photo-optical switch apparatus useful for example in keyboard switches includes a photopolymerized orthogonal matrix of horizontal and vertical intersecting light channels or guides, monolithically formed by exposure to ultraviolet light on a flat planar, plastic substrate. Each intersection has a refractive index higher than either the channel or the adjacent substrate area. A curved tap or light coupler couples the horizontal to the vertical channel of the array. The intersections of the channels are disposed over an array of upstanding projections on a flat mounting substrate with each projection located at a respective intersection of the horizontal and vertical light channel. A light absorbing key pad is arranged adjacent to each intersection to couple light from the channel up into the key pad. A relative loss of light indicates the key being depressed.
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申请公布号 |
US4480182(A) |
申请公布日期 |
1984.10.30 |
申请号 |
US19820358822 |
申请日期 |
1982.03.16 |
申请人 |
BURROUGHS CORPORATION |
发明人 |
ELY, RICHARD I.;MOSIER, CARL E. |
分类号 |
G02B5/00;G02B6/12;G02B6/35;G02B26/08;G02F1/313;G06F3/02;H03K17/96;H03K17/969;(IPC1-7):G02B5/14 |
主分类号 |
G02B5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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