JPS5469027A - Liquid crystal driving system - Google Patents
Liquid crystal driving systemInfo
- Publication number
- JPS5469027A JPS5469027A JP13546477A JP13546477A JPS5469027A JP S5469027 A JPS5469027 A JP S5469027A JP 13546477 A JP13546477 A JP 13546477A JP 13546477 A JP13546477 A JP 13546477A JP S5469027 A JPS5469027 A JP S5469027A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- state
- lamp
- duration
- signal
- 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.)
- Granted
Links
Landscapes
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
PURPOSE: To avoid deterioration of the effective value of the application voltage at the lamp driving time by varying the pulse duration of the driving voltage according to the state of the load, and thus to hold the normal display state.
CONSTITUTION: Hour and minute display electrode 2 and 3 consisting of the θ -shaped segment electrodes in 2 digits plus colon display electrode 4 are provided on the back of upper electrode substrate 1 at the liquid crystal display part of an electornic watch. At the same time, common electrodes 5W9 are attached to lower electrode substrate 1' which is located oppositely on te back of substrate 1 via the liquid crystal. Dynamic driving signals (c)W(g) are then applied to the liquid crystal display part of such constitution. The chainging state of the liquid crystal driving signal is shown in (a)W(g) when the night illumination lamp is lit up. In addition, switching state of the lamp switch, the driving voltage and the common electrode supply signal to be applied to terminal X or Y are shown in (a), (b) and (c) respectively. The pulse duration of the common signal is set narrower than the time duration of the segment signal by the fixed time duration b under the normal state (no lamp lighting) and then increased up to a fixed duration (a+b) at the lamp lighting time.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52135464A JPS6024958B2 (en) | 1977-11-11 | 1977-11-11 | LCD drive method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52135464A JPS6024958B2 (en) | 1977-11-11 | 1977-11-11 | LCD drive method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5469027A true JPS5469027A (en) | 1979-06-02 |
JPS6024958B2 JPS6024958B2 (en) | 1985-06-15 |
Family
ID=15152315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52135464A Expired JPS6024958B2 (en) | 1977-11-11 | 1977-11-11 | LCD drive method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6024958B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5792391A (en) * | 1980-11-28 | 1982-06-08 | Seiko Instr & Electronics | Electronic wrist watch |
JPS59222889A (en) * | 1983-05-31 | 1984-12-14 | シャープ株式会社 | Lquid crystal driving system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62112348U (en) * | 1986-01-07 | 1987-07-17 |
-
1977
- 1977-11-11 JP JP52135464A patent/JPS6024958B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5792391A (en) * | 1980-11-28 | 1982-06-08 | Seiko Instr & Electronics | Electronic wrist watch |
JPS59222889A (en) * | 1983-05-31 | 1984-12-14 | シャープ株式会社 | Lquid crystal driving system |
Also Published As
Publication number | Publication date |
---|---|
JPS6024958B2 (en) | 1985-06-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5469027A (en) | Liquid crystal driving system | |
JPS52123125A (en) | Memory panel driving system | |
JPS5492097A (en) | Liquid crystal display unit | |
JPS5563181A (en) | Direct current regeneration circuit | |
JPS5319789A (en) | Electrochromic display device | |
JPS5330226A (en) | Driving system for discharge display element | |
JPS53124026A (en) | Display panel driving device | |
JPS5529728A (en) | Battery life display unit of electronic watch | |
JPS5441759A (en) | Projection shape display device | |
JPS5464995A (en) | Bar graph display unit using liquid crystal | |
JPS552960A (en) | Digital display system | |
JPS5562385A (en) | Battery life announcing watch | |
JPS5274296A (en) | Liquid crystal driving circuit | |
JPS5692516A (en) | Liquid crystal display device | |
JPS5357796A (en) | Scanning electrode voltage supply circuit of storge type liquid crystalmatrix display elements | |
JPS5422795A (en) | Liquid crystal display unit | |
JPS5774723A (en) | Liquid-crystal display device | |
JPS5487258A (en) | Liquid crystal support frame for liquid crystal display type digital watch | |
JPS53101298A (en) | Liquid crystal display unit | |
JPS53132226A (en) | Matrix display unit | |
JPS5340297A (en) | Driving system of liquid crystal display unit | |
JPS5422797A (en) | Liquid crystal display unit | |
JPS5382441A (en) | Liquid crystal display panel | |
GB1528423A (en) | Electronic timepiece | |
JPS52116094A (en) | Liquid crystal display unit |