Low cost electronic apparatus construction method |
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| 申请号 | EP83303591 | 申请日 | 1983-06-22 | 公开(公告)号 | EP0100144A3 | 公开(公告)日 | 1987-09-02 |
| 申请人 | TEXAS INSTRUMENTS INCORPORATED; | 发明人 | Fiorella, Charles M.; Chrobak, Michael J.; Evans, Doyle R.; | ||||
| 摘要 | The present invention is a low cost electronic apparatus construction method which may be employed for hand held calculators, electronic learning aids and electronic games. The primary electrical circuit interconnection pattern of the electronic apparatus is printed upon a part of the case of the apparatus (11) which must be nonconducting. This printed circuit pattern (12) together with the construction of the back case (11) includes connection portions (21. 22 and 23) for electrical connection to the major components of the apparatus which may include an integrated circuit (15), a display device (16) and an electrical power source (17). The primary circuit pattern printed on the back case includes a plurality of interleaved comb key switch positions (17). The keyboard is constructed employing a plurality of keys aligned in registration with the key switch portions (26), each key having a shorting bar (104) for causing electrical connection across the key switch portion when the key is depressed. The top case (13) of the apparatus has an aperture for viewing the display device and a plurality of apertures for the keys. The keyboard may alternatively be constructed of a flexible membrane (12) in wnich pressure on a key switch position (163) causes electrical contact with a conductive ink (153) disposed in a depression (152) in the case (150) of the apparatus. In an alternative embodiment, the top case also includes an aperture enabling light to shine on a photovoltic power cell (19) employed to generate the electric power needed to ooerate the apparatus. | ||||||
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