Calendar display device
AssigneeKabushiki Kaisha Suwa Seikosha
InventorShuji Maezawa
Life of this patent
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Abstract
A liquid crystal calendar display device presents a full month of dates in a large-sized format. Sunday is always located in the left column or in the alternative in the right column of the calendar display regardless of the day which is the first date in the presented month. Only 16 electrode patterns are used to form all dates, and months of twenty-eight to thirty-one days are accommodated. Display elements are driven by a V-2V AC amplitude selective multiplexed system.
Claims20
In a calendar display device including first and second spaced and opposed electrode patterns having overlapped portions, and a liquid crystal material sandwiched between said electrode patterns, the improvement there comprising:
- the overlapped portions of said opposed electrode patterns forming six rows and ten columns of numerals, said numerals being consecutive in each said row, so much of said electrode patterns defining a unit or ones digit of each numeral being respectively commonly driven, a portion of the numerals having two digits having a tens digit formed of a plurality of electrodes for display, said plurality of electrodes being adapted for driving in at least two groups, selection among said groups causing said tens digit to be selectively displayed as one of at least two numerals;
- circuit means for selecting and driving said electrodes for display or non-display, said circuit means being adapted to select either the upper five rows or lower five rows of said six rows for driving, and to select consecutive columns for driving to display calendar months, the left-side column of the displayed month being a selected day of the week regardless of which calendar month is displayed.
A calendar display device including a pair of opposed baseplates and a liquid crystal material sandwiched between said baseplates, each said baseplate having a plurality of electrodes formed in a pattern thereon, said pattern comprising electrode segments for display arranged to define six rows and ten columns;
- electrode segments in a first said row forming consecutive numerals of one digit;
- electrode segments in a second said row forming consecutive numerals of one and two digits;
- electrode segments of a sixth row forming consecutive numerals of two digits;
- electrode segments in a third, fourth and fifth row being positioned to form two-digit numerals, with the ones digit being in consecutive order, the segment patterns of the last three numerals of each row being repeated as the segment patterns of the first three numerals of the following rows of said six rows, at least a portion of the tens digits in said third, fourth and fifth rows being formed by segments of at least two of said plurality of electrodes, whereby a portion of the tens digits in said third, fourth and fifth rows is selectively displayable in a plurality of numerical values,
- circuit means for selecting and driving said electrodes for display or non-display, said circuit means being adapted to select either the upper five rows or lower five rows of said six rows for driving, and to select consecutive columns for driving to display calendar months, the left-side column of the displayed month being a selected day of the week regardless of which calendar month is displayed.
Dependencies are inferred from the claim text.