46.001 FACE IN THE DARK, Science Service Historical Image Collection

1953 - Mrs. Betty Rogers demonstrates new-type clock with electroluminescent face

FACE IN THE DARK

CD 1967020 E&MP46.001

Electroluminescence

June 10, 1953

While pretty face of Mrs. Betty Rogers and that of conventionally-lighted clock at right are dimmed in shadow, new-type clock with electroluminescent face developed by General Electric scientists glows through the darkness to provide better visibility.

Electroluminescent face is lighted when electric current is applied directly to a phosphor painted on conducting glass. The clock at right is lighted by a one-watt incandescent lamp at the base of the dial.

The new light gives better, more even illumination yet uses only one-half cent a year worth of electricity. The one-watt lamp costs about 25 cents annually for electricity.