JPS5827877B2 - densid cay - Google Patents
densid cayInfo
- Publication number
- JPS5827877B2 JPS5827877B2 JP15166275A JP15166275A JPS5827877B2 JP S5827877 B2 JPS5827877 B2 JP S5827877B2 JP 15166275 A JP15166275 A JP 15166275A JP 15166275 A JP15166275 A JP 15166275A JP S5827877 B2 JPS5827877 B2 JP S5827877B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- voltage
- segment
- signal
- electrode
- 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
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/0023—Visual time or date indication means by light valves in general
- G04G9/0029—Details
- G04G9/0047—Details electrical, e.g. selection or application of the operating voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Description
【発明の詳細な説明】
本発明は、消費電力を減少させ、電池寿命を、長期化し
た電子時計に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic timepiece that reduces power consumption and extends battery life.
従来、交流駆動される表示体、例えば液晶を用いた電子
時計においては、液晶は常に３２Ｈｚ程度の交流信号に
より１駆動されていた。BACKGROUND ART Conventionally, in an electronic watch using an alternating current driven display, such as a liquid crystal, the liquid crystal is always driven by an alternating current signal of about 32 Hz.
液晶は、電気的にはコンデンサ負荷と考えられるが、こ
れを常に１駆動することは、消費電力を増大させ、電池
寿命を短期化させる一要因となっていた。Although the liquid crystal is electrically considered to be a capacitor load, always driving the liquid crystal at one time increases power consumption and becomes a factor in shortening the battery life.
本発明の目的は、液晶に印加される交流信号を間欠的に
印加することにより、液晶によるコンデンサの充放電の
電力損失を減少させ、結果的に消費電力を減少させ、電
池寿命を長期化することである。The purpose of the present invention is to reduce the power loss caused by charging and discharging a capacitor by the liquid crystal by intermittently applying an alternating current signal to the liquid crystal, thereby reducing power consumption and extending battery life. That's true.
以下、図画に従って本発明を説明すると、第１図は通常
の液晶パネルの原理図を示すものであり、１はコモン電
極、２はセグメント電極、３１は液晶を示すものである
。The present invention will be explained below with reference to the drawings. FIG. 1 shows the principle of a normal liquid crystal panel, in which 1 is a common electrode, 2 is a segment electrode, and 31 is a liquid crystal.
第２図は、液晶の動作原理を示すための電圧波形であり
、４は、コモン電極１に印加される電圧波形、５はセグ
メント電極２の中で電圧印加する必要ないセグメントに
印加される電圧波形、６はセグメント電極２の中で、電
圧印加する必要のあるセグメントに印加される電圧波形
、７はセグメント電極に電圧５が印加された時のコモン
−セグメント間電圧で、図より明らかな様に電圧は印加
されていない。FIG. 2 shows voltage waveforms to show the principle of operation of a liquid crystal. 4 is a voltage waveform applied to the common electrode 1, and 5 is a voltage applied to segments of the segment electrode 2 that do not require voltage application. The waveform 6 is the voltage waveform applied to the segment to which voltage must be applied in the segment electrode 2, and 7 is the common-to-segment voltage when voltage 5 is applied to the segment electrode, as is clear from the figure. No voltage is applied to.
８はセグメント電極に電圧６が印加された時のコモン−
セグメント間電圧で士Ｖの交流信号電圧が液晶に印加さ
れている。8 is the common when voltage 6 is applied to the segment electrode.
An alternating current signal voltage of +V is applied to the liquid crystal as an inter-segment voltage.
以上は、従来の交流駆動法による各部電圧波形であり、
ＦＥＭモードの液晶の場合、偏向板を液晶パネル上下面
に、偏向軸を９００回転させて使用した場合、電圧印加
されたセグメントは不透明に、印加されないセグメント
は透明になる。The above is the voltage waveform of each part according to the conventional AC drive method,
In the case of a FEM mode liquid crystal, when the deflection plates are used on the upper and lower surfaces of the liquid crystal panel and the deflection axis is rotated by 900 degrees, segments to which a voltage is applied become opaque and segments to which no voltage is applied become transparent.
９は、本発明による液晶パネルを不透明にしたい場合の
コモン−セグメント間の電圧波形で、８の波形と比較す
ると寺の間けつ駆動になっている。9 is a common-segment voltage waveform when it is desired to make the liquid crystal panel according to the present invention opaque, and when compared with the waveform 8, the voltage waveform is very similar to the one shown in FIG.
第３図は本発明の１駆動法を実現するための、駆動回路
の一実施例で、１０は液晶パネル共通電極１に印加され
る信号と同じ信号が入力される入力端子で、端子１０か
ら入力された信号はイクスクルーシブオア１９．２０の
一方の入力に印加されている。FIG. 3 shows an embodiment of a driving circuit for realizing the driving method 1 of the present invention. Reference numeral 10 denotes an input terminal to which the same signal as the signal applied to the liquid crystal panel common electrode 1 is input. The input signal is applied to one input of exclusive OR 19 and 20.
１１は間けつ比を決定する間けつ比制御信号入力端子で
、端子１１から入力された信号はＡＮＤゲー１−１７．
１８の一方の入力に印加されている。11 is a spacing ratio control signal input terminal for determining the spacing ratio, and the signal input from the terminal 11 is input to the AND gates 1-17.
18 is applied to one input.
１２．１３はセグメント制御信号か印加される入力端子
であり、端子１２から入力された信号はＡＮＤゲート１
７の他の入力に、端子１３から印加された信号はＡＮＤ
ゲート１８の他の入力にそれぞれ印加されている。12.13 is an input terminal to which a segment control signal is applied, and the signal input from terminal 12 is applied to AND gate 1.
The signal applied from terminal 13 to the other input of 7 is AND
are applied to the other inputs of gate 18, respectively.
更に、ＡＮＤゲ゛−ト１７の出力はイクスクルーシブオ
ア１９の他の入力に、ＡＮＤゲート１８の出力はイクス
クルーシブオア２０の他の入力にそれぞれ接続され、出
力端子１５．１６は各々液晶パネルのセグメント電極２
に接続されている。Further, the output of the AND gate 17 is connected to the other input of the exclusive OR 19, the output of the AND gate 18 is connected to the other input of the exclusive OR 20, and the output terminals 15 and 16 are connected to the liquid crystal display. Panel segment electrode 2
It is connected to the.
以上の様な構成の駆動回路において、各部の電圧波形を
第４図に示すとともにその動作を説明する。In the drive circuit configured as described above, voltage waveforms at each part are shown in FIG. 4, and its operation will be explained.
端子１０及び液晶パネルの共通電極１に印加される電圧
を１０ａに示す。The voltage applied to the terminal 10 and the common electrode 1 of the liquid crystal panel is shown at 10a.
今、間けつ比を士とすると端子１１には１１ａに示す信
号が印加される。Now, assuming that the spacing ratio is 2, a signal shown at 11a is applied to the terminal 11.
さらに、端子１２に入力されるセグメント制御信号がＨ
ｎ、端子１３のそれがＬ Ｄであった場合、ＡＮＤゲー
ト１７．１８の出力信号は各々ｉ７ａ、１８ａに示す様
になる。Furthermore, the segment control signal input to terminal 12 is
n, if that of terminal 13 is LD, the output signals of AND gates 17 and 18 will be as shown at i7a and 18a, respectively.
したがって、イクスクルーシブオア１５．１６の出力信
号は各々１５ａ 、１６ａに示す様になるとともに、そ
の信号はセグメント２に接続される。Therefore, the output signals of exclusive ORs 15 and 16 are as shown at 15a and 16a, respectively, and the signals are connected to segment 2.
従って、液晶パネルの共通電極１、セグメント電極２の
間に印加される電圧は、端子１０と端子１５．１６の間
の電位差に等しくなり、それは１０−１５ａ 、 １０
−１６ａに示す波形となる。Therefore, the voltage applied between common electrode 1 and segment electrode 2 of the liquid crystal panel is equal to the potential difference between terminal 10 and terminal 15.16, which is 10-15a, 10
-16a shows the waveform.
したがって、端子１５が接続されたセグメントのみに電
圧は印加されるとともに、所望の間けつ駆動が行なわれ
る。Therefore, voltage is applied only to the segment to which the terminal 15 is connected, and the desired intermittent drive is performed.
以上、本発明の構成によれは、液晶の間けつ１駆動を行
なうことにより液晶コンデンサの充電、放電による電力
損失が１／（間０つ比）に減少し、電子時計に使用され
る電池の電池寿命が延び、使用者は電池交換をする回数
が減少し、電子時計のイメージ向上を与える効果は大き
い。As described above, according to the configuration of the present invention, the power loss due to charging and discharging of the liquid crystal capacitor is reduced to 1/(interval ratio) by driving the liquid crystal intermittently. This extends battery life, reduces the number of times users have to replace batteries, and has a significant effect on improving the image of electronic watches.
第１図は液晶パネルの原理図、第２図は液晶パネルの駆
動用信号波形、第３図は本発明による駆動回路の一実施
例、第４図は第３図の各部波形である。
１・・・・・・液晶パネル共通電極、２・・・・・・液
晶パネルセグメント電極、３・・・・・・液晶層、１０
・・・・・・共通電極用信号入力端子、１１・・・・・
・間けつ比制御信号入力端子、１２．１３・・・・・・
セグメント制御信号入力端子、１５，１６・・・・・・
セグメント電極用出力端子、１７．１８・・・・・・Ａ
ＮＤゲ゛−ト、１９．２０・・・・・・イクスクルーシ
ブオアである。1 is a diagram showing the principle of a liquid crystal panel, FIG. 2 is a driving signal waveform of the liquid crystal panel, FIG. 3 is an embodiment of a driving circuit according to the present invention, and FIG. 4 is a waveform of each part of FIG. 3. DESCRIPTION OF SYMBOLS 1...Liquid crystal panel common electrode, 2...Liquid crystal panel segment electrode, 3...Liquid crystal layer, 10
......Signal input terminal for common electrode, 11...
・Interval ratio control signal input terminal, 12.13...
Segment control signal input terminals, 15, 16...
Segment electrode output terminal, 17.18...A
ND gate, 19.20...Exclusive OR.
Claims (1)
コモン電極に信号を印加するための第１の駆動手段、上
記セグメント電極に信号を印加するための第２の駆動手
段、上記第１、第２の駆動手段の出力を強制的に同電位
にする間けつ比制御手段とから構成され、上記間けつ比
制御手段を間けつ的に作動させ、上記第１、第２の駆動
手段の出力を間けつ的に同電位とし、上記表示体のコモ
ン電極とセグメント電極間に印加される電圧を間欠的に
零にすることにより上記表示体で消費される電力を低減
することを特徴とする電子時計。1. A display body having a common electrode and a segment electrode, a first driving means for applying a signal to the common electrode, a second driving means for applying a signal to the segment electrode, and the first and second driving means for applying a signal to the segment electrode. and an intermittent ratio control means for forcing the outputs of the driving means to have the same potential, and the intermittent ratio control means is actuated intermittently to intermittently control the outputs of the first and second driving means. An electronic timepiece characterized in that power consumed by the display body is reduced by setting the voltages at the same potential and intermittently reducing the voltage applied between the common electrode and the segment electrode of the display body to zero.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15166275A JPS5827877B2 (en) | 1975-12-19 | 1975-12-19 | densid cay |
| GB5233276A GB1530400A (en) | 1975-12-19 | 1976-12-15 | Electronic timepiece |
| HK10682A HK10682A (en) | 1975-12-19 | 1982-03-04 | Electronic timepiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15166275A JPS5827877B2 (en) | 1975-12-19 | 1975-12-19 | densid cay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5275372A JPS5275372A (en) | 1977-06-24 |
| JPS5827877B2 true JPS5827877B2 (en) | 1983-06-11 |
Family
ID=15523469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15166275A Expired JPS5827877B2 (en) | 1975-12-19 | 1975-12-19 | densid cay |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5827877B2 (en) |
| GB (1) | GB1530400A (en) |
| HK (1) | HK10682A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5482268A (en) * | 1977-12-14 | 1979-06-30 | Citizen Watch Co Ltd | Electronic watch with alarm |
-
1975
- 1975-12-19 JP JP15166275A patent/JPS5827877B2/en not_active Expired
-
1976
- 1976-12-15 GB GB5233276A patent/GB1530400A/en not_active Expired
-
1982
- 1982-03-04 HK HK10682A patent/HK10682A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5275372A (en) | 1977-06-24 |
| HK10682A (en) | 1982-03-12 |
| GB1530400A (en) | 1978-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4117475A (en) | Driver circuit for electrochromic display device | |
| JP4985113B2 (en) | Electrophoretic display panel driving method and driving device, electrophoretic display device, and electronic apparatus | |
| GB1364618A (en) | Voltage boosters | |
| GB1567474A (en) | Electronic timepieces | |
| US3781864A (en) | Driving arrangement for liquid crystal displays | |
| US3828547A (en) | Quartz crystal timepiece | |
| US4259715A (en) | Voltage conversion system for electronic timepiece | |
| JPS5827877B2 (en) | densid cay | |
| US4141064A (en) | Booster circuit | |
| US4833284A (en) | Power relay switching control device for microwave oven | |
| US4150365A (en) | Driver circuit for electrochromic display device | |
| US3946550A (en) | Quartz crystal timepiece | |
| US4060974A (en) | Method and apparatus for driving electrochromic display device | |
| US4173758A (en) | Driving circuit for electrochromic display devices | |
| JPS5823637B2 (en) | liquid crystal display device | |
| JPS5886591A (en) | Liquid crystal display | |
| JPH0682261B2 (en) | Double voltage generation circuit for LCD drive | |
| JPS5832394B2 (en) | Piezoelectric speaker drive circuit | |
| JPS5857118B2 (en) | Electrochromism Hiyoji Souchino Kudo Cairo | |
| JPS58100897A (en) | Crystal liquid driving system | |
| JPS6129894A (en) | Active matrix type liquid crystal display | |
| JPS5853342B2 (en) | Electrochromism Hiyoji Souchino Kudo Cairo | |
| JPS5825356Y2 (en) | electronic clock | |
| JP2786185B2 (en) | LCD drive circuit | |
| JPS5821711B2 (en) | world clock |