Digitizer tablet having cooling apparatus with base and integrat

Details Digitizer tablet having cooling apparatus with base and integrat Digitizer tablet having cooling apparatus with base and integrat

1991-10-18

1992-08-11

Thompson, Gregory D.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

361392, 361399, 361388, H05K 720

Patent

active

051385236

ABSTRACT:
A digitizer tablet has a base integrated with a heat sink. The base includes a flat portion which surrounds the heat sink. The sink is recessed relative to the flat portion and includes a flat upper surface on which a thermal pad is mounted. A planar member overlies the base and has a plurality of heat generating modules mounted on the underside thereof, the modules being pressed into the thermal pad to establish a thermal conduction whereby heat flows from the modules through the thermal pad and into the heat sink. The underside of the heat sink is recessed and has a plurality of cooling pins which provide a relatively large area. The pins are cooled by natural air convection and radiation, and lie within the recess to prevent body contact with portions other than the tips thereof. Bosses mount the planar member on the base and coact with fasteners to press the modules against the thermal pad.

REFERENCES:
patent: 4029999 (1977-06-01), Neumann et al.
patent: 4571456 (1986-02-01), Paulsen et al.
patent: 4602314 (1986-07-01), Broadbent
"Thermally Conductive Elastomer for Cooling", IBM TDB, vol. 28, No. 4, Sep. 1985, p. 1490.

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