Patent US3437854A successfully refreshed from Google Patents.
US3863247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving circuit for liquid crystal display cell
Assignee: Suwa Seikosha KK
•
Filing: 1972-10-18
•
Granted: 1975-01-28
•
Expires: 1992-10-18
Abstract
Abstract A driving circuit for a multi-column liquid crystal display cell wherein a data signal is transformed into a data signal alternating in a uniform period. A decoder matrix circuit has said transformed data signal as one group of inputs and a timing signal representative of each column as a second group of inputs. The liquid crystal display cell is driven by an alternating output signal from said decoder matrix circuit and an alternating output signal applied to an electrode of said liquid crystal display cell common to all of the columns thereof.
Inventors
- 👤 Minoru Hosokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:15
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/04; G09G3/16; G09G3/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
A driving circuit for a liquid crystal display cell having a segmented electrode divided into a plurality of segments grouped in a plurality of columns and a common electrode, comprising transforming circuit means for transforming input data signals into data signals alternating with a uniform period in response to an alternating driving signal, the data portions of said data signal alternating out of phase with said alternating driving signal; memory circuit means having a memory decoder matrix means having first and second groups of inputs, said first group of inputs being connected to said transforming circuit means for receiving said alternating data signals from said transforming circuit means, said second group of inputs being connected to receive timing signals representative respectively of each of said plurality of columns, said decoder matrix means having a plurality of outputs each connected with one of said liquid crystal display cell segmented electrode segments for applying an alternating output signal to selected ones of said segments; and means for applying said alternating driving signal to said common electrode.
Claim 2
Dependent Claim
174 words
A driving circuit for a liquid crystal display cell having a segmented electrode divided into a plurality of segments grouped in a plurality of columns and a common electrode, comprising transforming circuit means for transforming input data signals into data signals alternating with a uniform period in response to an alternating driving signal, the data portions of said data signal alternating out of phase with said alternating driving signal; memory circuit means having a memory decoder matrix means having first and second groups of inputs, said first group of inputs being connected to said transforming circuit means for receiving said alternating data signals from said transforming circuit means, said second group of inputs being connected to receive timing signals representative respectively of each of said plurality of columns, said decoder matrix means having a plurality of outputs each connected with one of said liquid crystal display cell segmented electrode segments for applying an alternating output signal to selected ones of said segments; and means for applying said alternating driving signal to said common electrode.
Claim 3
Dependent Claim
31 words
A driving circuit as recited in claim 1, wherein said data signal has a period T1 and said alternating driving signal has a period T2 selected so that T2 > T1.
Claim 4
Dependent Claim
76 words
A driving circuit as recited in claim 1, including means for synchronizing the alternating output signals applied to the segmented electrode segments with the alternating driving signal applied to the common electrode including gate circuit means associated with each of said columns for receiving said alternating driving signal and the associated column timing signal, said common electrode being divided into separate common electrodes for each column for connection to respective ones of said gate circuit means.
Claim 5
Dependent Claim
54 words
A driving circuit as recited in claim 1, wherein said transforming circuit means includes one exclusive OR logic circuit for each segment in a single column of said liqUid crystal display cell, each of said exclusive OR logic circuits having as its inputs said alternating driving signal and one of said input data signals.
Claim 6
Dependent Claim
17 words
A driving circuit as recited in claim 1, wherein said decoder matrix means is formed from MOSFET''s.
References Cited (Backward Citations)
US3654606A
Cited
US3653745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |