US 4,581,716 A · Data memory device

Abstract

A compact portable card-shaped data memory device which effectively accesses stored coded data has a power supply device consisting of a plurality of horizontally arranged solar cells fitted to one side of a printed circuit board, both sides of which are impressed with printed circuit. The other side of the printed circuit board is fitted with semiconductor chips respectively constituting a semiconductor memory and a microcomputer for converting data read out of said semiconductor memory into serial coded data, and a light-emitting element which is optically controlled in conformity with said coded data. The semiconductor chips and a drive system for the light-emitting element are supplied with electric energy delivered from the power supply device. The circuit element section including the printed circuit board is sealed in a synthetic resin case, thereby constructing the data memory device wholly in a flat card form.

Claims18

Dependent claims

A data memory device for light-energized, serial reading-out of stored coded data from said data memory devices to an optical scanner, comprising:

a circuit board in the form of a portable card;
power supply means, attached to said circuit board, for generating electric energy when applied with photo energy;
a semiconductor chip logic circuit attached to said circuit board and being operative when supplied with said electric energy from said power supply means, said logic circuit including:
(1) semiconductor memory means for storing said coded data, (2) read out means for reading said coded data from said semiconductor memory means thereby generating coded signals corresponding thereto, (3) waiting time setting means for setting a waiting time when said read-out means finishes generating said coded signals, and (4) means for initiating operation of said read-out means upon lapse of the waiting time set by said waiting time setting means;
and
optical output means, coupled to said logic circuit, for generating and intermittently supplying optical output signals corresponding to said coded signals supplied from said logic circuit and adapted to be sensed by said optical scanner.

3 more elements

Dependencies are inferred from the claim text.

Data memory device

Life of this patent

Data memory device

Life of this patent

Abstract

Claims18