Display with improved frame surrounding display element

Details Display with improved frame surrounding display element Display with improved frame surrounding display element

1989-11-13

1993-09-21

Weldon, Ulysses

Communications: electrical

Visual indication

Movable

34081523, 345 46, G08G 500

Patent

active

052472914

ABSTRACT:
Disclosed herein is a display to be applied to a digital switch. This display includes a casing (1) formed of a box-type casing (2) and a cover (3), a display element (8) facing a display window (2b) accommodated in the casing (1), a printed wiring board (9) for supporting the display element (8), and a printed wiring board (14) which is connected to the printed wiring board (9) and on which a control circuit (16) for displaying an external input signal on the display element (8), and the like are mounted. At the front portion of the casing (1) is formed frames 11a and 11b extending over a display face (8) of the display element (8), and thus a portion of the printed wiring board (9) which is located at the outer periphery of the display element (8) cannot be seen from the outside. A conductive pattern (18) for discharging a static electricity is provided on the printed wiring board (9), corresponding to a region in which the frames (11a, 11b) engaged with each other. The frames (11a, 11b) have adhesive tapered faces, and thus a static electricity is hard to enter the display from the outside. Thus, it flows out of the display through the conductive pattern (18) even if it enters the display.

REFERENCES:
patent: 3631299 (1971-12-01), Meyer et al.
patent: 4245274 (1981-01-01), MacDonald et al.
patent: 4667266 (1987-05-01), Masuoka et al.
patent: 4667277 (1987-05-01), Hanchar

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