Electric apparatus for displaying a plurality of key symbols on a single passive display
First Claim
Patent Images
1. An electrical apparatus for displaying a plurality of key symbols on a single passive display comprising:
- keyboard means including a first input key group comprised of a plurality of input keys for selectively inputting at least numeral data and function data, each of the input keys of the first input key group having at least two key symbols representing numerals and/or functions associated therewith; and
a second input key group comprised of input keys for causing one of said at least two key symbols corresponding to each of the input keys of the first input key group to be selectively displayed;
a single passive display means disposed under said keyboard means to selectively display one of said at least two key symbols for each of the input keys of the first input key group, said single passive display means including two electrode substrates (19a, 19b) stacked one over the other, electrodes (21, 22, 23,
25) provided respectively on said substrates and between which a liquid layer is sealed, one of said electrode substrates including electrodes (21, 22 and
23) provided on those areas of said one substrate corresponding to said keys of said first input key group to represent at least two key symbols for each key of said first input key group;
central processing unit means electrically connected between said keyboard means and said single passive display means to perform a predetermined calculation based on the numeral data and function data which are inputted by the operation of the keys of said first input key group, and for causing one respective key symbol to be displayed on said single passive display means for each key of said first input key group as a function of the operation of input keys of said second input key group; and
output means connected to said central processing unit means to display a result of said calculation performed by said central processing unit means.
0 Assignments
0 Petitions
Accused Products
Abstract
An electric apparatus is adapted to display a plurality of key symbols on a single passive display. A keyboard includes a plurality of input keys for selectively inputting at least numeral data and function data and input keys operated to selectively display key symbols representing numerals, functions, etc. A single passive liquid crystal display is arranged below the keyboard. A plurality of electrodes are arranged on the predetermined areas of the single passive display and the key symbols corresponding to the functions are selectively displayed, by a key operation, on the electrodes.
110 Citations
7 Claims
-
1. An electrical apparatus for displaying a plurality of key symbols on a single passive display comprising:
-
keyboard means including a first input key group comprised of a plurality of input keys for selectively inputting at least numeral data and function data, each of the input keys of the first input key group having at least two key symbols representing numerals and/or functions associated therewith; and
a second input key group comprised of input keys for causing one of said at least two key symbols corresponding to each of the input keys of the first input key group to be selectively displayed;a single passive display means disposed under said keyboard means to selectively display one of said at least two key symbols for each of the input keys of the first input key group, said single passive display means including two electrode substrates (19a, 19b) stacked one over the other, electrodes (21, 22, 23,
25) provided respectively on said substrates and between which a liquid layer is sealed, one of said electrode substrates including electrodes (21, 22 and
23) provided on those areas of said one substrate corresponding to said keys of said first input key group to represent at least two key symbols for each key of said first input key group;central processing unit means electrically connected between said keyboard means and said single passive display means to perform a predetermined calculation based on the numeral data and function data which are inputted by the operation of the keys of said first input key group, and for causing one respective key symbol to be displayed on said single passive display means for each key of said first input key group as a function of the operation of input keys of said second input key group; and output means connected to said central processing unit means to display a result of said calculation performed by said central processing unit means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification