Invention Grant
- Patent Title: Determining a media feature using a photovoltaic cell and an electroluminescent light panel
- Patent Title (中): 使用光伏电池和电致发光面板确定介质特征
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Application No.: US11273819Application Date: 2005-11-14
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Publication No.: US07675622B2Publication Date: 2010-03-09
- Inventor: Jon R. Johnson
- Applicant: Jon R. Johnson
- Applicant Address: US TX Houston
- Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee Address: US TX Houston
- Main IPC: G01N21/84
- IPC: G01N21/84
Abstract:
This invention relates to an apparatus for determining a media feature, comprising: a plurality of light filters such that the filters include a media measurement aperture and a calibration aperture and wherein the filters are spaced a predetermined distance apart to allow media to be introduced between the filters; a light source located substantially adjacent to one of the filters; and a light detector located substantially adjacent to another of the filters.
Public/Granted literature
- US20070109538A1 Determing a media feature using a photovoltaic cell and an electroluminescent light panel Public/Granted day:2007-05-17
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