GB1380629A - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- GB1380629A GB1380629A GB3222372A GB3222372A GB1380629A GB 1380629 A GB1380629 A GB 1380629A GB 3222372 A GB3222372 A GB 3222372A GB 3222372 A GB3222372 A GB 3222372A GB 1380629 A GB1380629 A GB 1380629A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- signals
- low
- liquid crystal
- terminals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
- G09G3/16—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source
- G09G3/18—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source using liquid crystals
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
1380629 Matrix displays ROCKWELL INTERNATIONAL CORP 10 July 1972 [4 Oct 1971] 32223/72 Heading G5C A display comprises a liquid crystal panel having two terminals, means for selectively applying a H.F. signal to a terminal to prevent activation of the liquid crystal and means for selectively applying out-of-phase low-frequency signals to both terminals to produce activation. The panel comprises a plurality of sets of electrodes with corresponding electrodes of each set connected and back electrodes aligned with the sets. Each group of interconnected electrodes and each back electrode is connected to a driver circuit 21 ... 27; 33 ... 36. Each circuit comprises an inverter 43, 54; two NAND gates 44, 49; 51, 53; an AND gate 46, 52 and an amplifier 47, 55. Low and high frequency pulse signals are applied via terminals 41, 42 to the NAND gates, low frequency signals to drivers 21 ... 27 being inverted by inverter 28. Depending on the control signal applied to inputs 50 the output is of low or high frequency pulses. The low frequency signals are applied sequentially to the back electrodes by signals from a ring counter and sequentially to groups of driver circuits each group corresponding to the electrodes forming a digit to be displayed. During the time that a group is energized the D.C. potential may be reversed. Alternatively H.F. signals are applied only to the back electrodes. The panel may include a mirror when used in the reflective manner.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18868671A | 1971-10-04 | 1971-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1380629A true GB1380629A (en) | 1975-01-15 |
Family
ID=22694123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3222372A Expired GB1380629A (en) | 1971-10-04 | 1972-07-10 | Liquid crystal display |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS4845195A (en) |
| CA (1) | CA994890A (en) |
| DE (1) | DE2245319B2 (en) |
| GB (1) | GB1380629A (en) |
| IT (1) | IT964577B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5317256B2 (en) * | 1972-09-19 | 1978-06-07 | ||
| JPS4960439A (en) * | 1972-10-12 | 1974-06-12 | ||
| JPS543574B2 (en) * | 1973-10-12 | 1979-02-24 | ||
| JPS5836912B2 (en) * | 1973-10-15 | 1983-08-12 | シャープ株式会社 | LCD drive method |
| JPS50120731A (en) * | 1974-03-08 | 1975-09-22 | ||
| DE2534694C2 (en) * | 1974-08-14 | 1984-02-02 | Kabushiki Kaisha Daini Seikosha, Tokyo | Control circuit for a liquid crystal display device |
| US4824215A (en) * | 1988-01-22 | 1989-04-25 | Xtalite Technology Limited/La Technologie Xtalite Limitee | Liquid crystal display apparatus |
-
1972
- 1972-07-10 GB GB3222372A patent/GB1380629A/en not_active Expired
- 1972-07-26 IT IT5178972A patent/IT964577B/en active
- 1972-08-03 CA CA148,631A patent/CA994890A/en not_active Expired
- 1972-09-15 DE DE19722245319 patent/DE2245319B2/en active Pending
- 1972-09-19 JP JP9444072A patent/JPS4845195A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4845195A (en) | 1973-06-28 |
| CA994890A (en) | 1976-08-10 |
| IT964577B (en) | 1974-01-31 |
| DE2245319A1 (en) | 1973-04-12 |
| DE2245319B2 (en) | 1974-08-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |