JPS6396637A - Printing head for liquid crystal shutter printer - Google Patents
Printing head for liquid crystal shutter printerInfo
- Publication number
- JPS6396637A JPS6396637A JP61242655A JP24265586A JPS6396637A JP S6396637 A JPS6396637 A JP S6396637A JP 61242655 A JP61242655 A JP 61242655A JP 24265586 A JP24265586 A JP 24265586A JP S6396637 A JPS6396637 A JP S6396637A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal shutter
- shutter
- voltage
- light
- 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.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 26
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 claims abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000007334 memory performance Effects 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Landscapes
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Liquid Crystal (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はプリンタ、特に強誘電性液晶の液晶シャッタを
用いた液晶プリンタのプリントヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a printer, and more particularly to a print head for a liquid crystal printer using a liquid crystal shutter of ferroelectric liquid crystal.
［従来の技術］
従来、この種の液晶シャッタプリンタのプリントヘッド
は液晶のメモリ性の劣化は監視していなかった。[Prior Art] Conventionally, the print head of this type of liquid crystal shutter printer did not monitor the deterioration of the memory properties of the liquid crystal.
［発明が解決しようとする問題点］
上述した従来の液晶シャッタのプリンタにおけるプリン
トヘッドは液晶のメモリ性については監視していないの
で、長時間の印字で液晶に不必要な電圧が加えられた場
合に、メモリ性の劣化が起ったことを検知できず、印字
品質が低下するという欠点があった。[Problems to be Solved by the Invention] The print head in the conventional liquid crystal shutter printer described above does not monitor the memory properties of the liquid crystal, so if unnecessary voltage is applied to the liquid crystal during long printing. Another disadvantage is that it is not possible to detect the occurrence of memory deterioration, resulting in a decrease in print quality.
本発明の目的は液晶シャッタの劣化に伴なう印字品質の
低下を防止する液晶シャッタプリンタのプリントヘッド
を提供することにおる。An object of the present invention is to provide a print head for a liquid crystal shutter printer that prevents deterioration in print quality due to deterioration of the liquid crystal shutter.
「問題点を解決するための手段］
本発明は強誘電性液晶の液晶シャッタを用いたプリンタ
において、液晶シャッタを通過した光量を測定するセン
サと、センサの出力波形によって液晶シャッタに適当な
校正電圧を印加するドライバとを有することを特徴とす
る液晶シャッタプリンタのプリントヘッドである。"Means for Solving the Problems" The present invention provides a printer using a liquid crystal shutter made of ferroelectric liquid crystal. This is a print head for a liquid crystal shutter printer, characterized in that it has a driver for applying a voltage.
［実施例コ 以下、本発明の一実施例を図により説明する。[Example code] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図に示す本実施例では光源１と感光体７との間に強
誘電性液晶の液晶シャッタ２を配置し、ざらに液晶シャ
ッタ２を通過した光■を測定する光量センサ５と、光量
センサ５の出力が入力する検出回路６と、制御回路３と
、液晶シャッタ２に電圧を印加するドライバ４とを備え
たものである。In this embodiment shown in FIG. 1, a liquid crystal shutter 2 made of ferroelectric liquid crystal is disposed between a light source 1 and a photoreceptor 7, and a light amount sensor 5 for measuring the light (2) that roughly passes through the liquid crystal shutter 2 is provided. The device includes a detection circuit 6 into which the output of the sensor 5 is input, a control circuit 3, and a driver 4 that applies a voltage to the liquid crystal shutter 2.
第１図において、光源１からの光が液晶シャッタ２に照
射されており、イニシャライズ時や印字をしない時に、
制御回路３からの制御信号で液晶ドライバ４は第２図に
示す波形を出力する。In Fig. 1, light from a light source 1 is irradiated onto a liquid crystal shutter 2, and when initializing or not printing,
In response to the control signal from the control circuit 3, the liquid crystal driver 4 outputs the waveform shown in FIG.
液晶シャッタ２が良好な状態であれば、センサ５の出力
は第３図に示す通りであり、正または負の電圧が余計に
印加されたときのセンサ５の出力は第４図、第５図のよ
うになる。When the liquid crystal shutter 2 is in good condition, the output of the sensor 5 is as shown in FIG. 3, and when an additional positive or negative voltage is applied, the output of the sensor 5 is as shown in FIGS. 4 and 5. become that way.
検出回路６は第４図または第５図の波形を検出すると、
液晶シャッタ２に余計に印加されている電圧と逆の極性
の電圧を制御回路３．ドライバ４を通して印加する。When the detection circuit 6 detects the waveform shown in FIG. 4 or 5,
The control circuit 3 applies a voltage of the opposite polarity to the additional voltage applied to the liquid crystal shutter 2. The voltage is applied through the driver 4.
［発明の効果］
以上説明したように本発明は液晶シャッタを通過した光
量を測定し、その波形により適当な校正電圧を印加する
ことにより、長時間の印字でもメモリ性が劣化せず良好
な印字を得ることができる効果がおる。[Effects of the Invention] As explained above, the present invention measures the amount of light passing through the liquid crystal shutter and applies an appropriate calibration voltage based on the waveform, thereby ensuring good printing without deteriorating memory performance even during long printing. There is an effect that can be obtained.
第１図は本発明の一実施例を示す構成図、第２図は液晶
シャッタへの印加電圧波形を示す図、第３図〜第５図は
センサの出力波形図である。FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing voltage waveforms applied to a liquid crystal shutter, and FIGS. 3 to 5 are output waveform diagrams of the sensor.
Claims (1)
おいて、液晶シャッタを通過した光量を測定するセンサ
と、センサの出力波形によつて液晶シャッタに適当な校
正電圧を印加するドライバとを有することを特徴とする
液晶シャッタプリンタのプリントヘッド。(1) A printer using a ferroelectric liquid crystal shutter has a sensor that measures the amount of light passing through the liquid crystal shutter, and a driver that applies an appropriate calibration voltage to the liquid crystal shutter based on the output waveform of the sensor. A print head for a liquid crystal shutter printer featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61242655A JPS6396637A (en) | 1986-10-13 | 1986-10-13 | Printing head for liquid crystal shutter printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61242655A JPS6396637A (en) | 1986-10-13 | 1986-10-13 | Printing head for liquid crystal shutter printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6396637A true JPS6396637A (en) | 1988-04-27 |
Family
ID=17092273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61242655A Pending JPS6396637A (en) | 1986-10-13 | 1986-10-13 | Printing head for liquid crystal shutter printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6396637A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03209434A (en) * | 1990-01-12 | 1991-09-12 | Seiko Instr Inc | Driving method for optical write type liquid crystal light valve |
| JPH03209423A (en) * | 1990-01-12 | 1991-09-12 | Seiko Instr Inc | Driving method for optical write type liquid crystal write valve device |
-
1986
- 1986-10-13 JP JP61242655A patent/JPS6396637A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03209434A (en) * | 1990-01-12 | 1991-09-12 | Seiko Instr Inc | Driving method for optical write type liquid crystal light valve |
| JPH03209423A (en) * | 1990-01-12 | 1991-09-12 | Seiko Instr Inc | Driving method for optical write type liquid crystal write valve device |
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