Message display calculator
First Claim
1. A multiple display calculator device comprising:
- a calculator including a casing having a front face, a plurality of numeric and function keys located on said front face, a numeric first LCD located on said front face, a calculator network responsive to the actuation of said keys and having an output actuating said first LCD, and voltage means for energizing said calculator network;
a second LCD located on said front face for selectively passing light therethrough; and
a predetermined message positioned behind the second LCD such that the message is visible when light is selectively passed through the second LCD.
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Accused Products
Abstract
A pocket calculator includes a casing having on its front face numeric and function keys and a numeric first liquid crystal display (LCD) and a message second LCD. Housed in the casing is a calculator network module housing and a first battery connected through a key operated switch contained in the network to energize the network and actuate the first LCD. An inverter IC integrated circuit and second battery are housed in the casing and actuate the second LCD, the battery being connected to the inverter input through a transistor switch rendered conductive in response to the energization of the calculator network. Alternatively, a message third LCD provided in which the message is devisualized upon the application of a voltage thereto with the energization of the computer. The second and third LCDs may be a single common unit with the faces of a section of a common LCD being coated with light polarizing layers which are optically mutually perpendicular.
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Citations
9 Claims
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1. A multiple display calculator device comprising:
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a calculator including a casing having a front face, a plurality of numeric and function keys located on said front face, a numeric first LCD located on said front face, a calculator network responsive to the actuation of said keys and having an output actuating said first LCD, and voltage means for energizing said calculator network; a second LCD located on said front face for selectively passing light therethrough; and a predetermined message positioned behind the second LCD such that the message is visible when light is selectively passed through the second LCD. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification