JPS6292019A - Driving method for light emitting source - Google Patents
Driving method for light emitting sourceInfo
- Publication number
- JPS6292019A JPS6292019A JP60232102A JP23210285A JPS6292019A JP S6292019 A JPS6292019 A JP S6292019A JP 60232102 A JP60232102 A JP 60232102A JP 23210285 A JP23210285 A JP 23210285A JP S6292019 A JPS6292019 A JP S6292019A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- driving method
- timer
- light emitting
- 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
Landscapes
- Led Devices (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は光学式タブレットの入力装置（以下ライトベン
と言う）の発光部の光源駆動方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for driving a light source of a light emitting section of an input device for an optical tablet (hereinafter referred to as a light ben).
（従来技術）
従来、光点位置検出可能な素子による光学式タブレット
と、ライトベンとを用いて、ＣＡＤ等の図形入力、線分
操作等が行われている。(Prior Art) Conventionally, graphic input for CAD and the like, line segment manipulation, etc., have been performed using an optical tablet with an element capable of detecting the position of a light spot and a light bench.
かかる場合２外乱光とライトペンのＬＥＤの光とを識別
するため、ＬＥＤを特定の周波数ｆ。In such a case, in order to distinguish between the ambient light and the light from the LED of the light pen, the LED is set to a specific frequency f.
の交流信号で点滅させることが知られている。It is known that it can be made to blink using an alternating current signal.
（発明が解決しようとする問題点）
電池内臓のライトペンに於て、ＬＥＤを上記のごとく点
滅駆動させると（第２図（ａｌ参照）。(Problems to be Solved by the Invention) In a light pen with a built-in battery, when the LED is driven to blink as described above (see Fig. 2 (al)).
短時間で電池交換の必要性が生じ、また、容量の大きな
電池を用いるとライトペンの操作性が悪化するという問
題点があった。There is a problem that the battery needs to be replaced in a short time, and that the use of a battery with a large capacity deteriorates the operability of the light pen.
（問題点を解決する手段）
本発明は、ライトベン使用時に於て、常時ＬＥＤを点滅
駆動することが電池消耗の大きな要因であるという点に
鑑みてなされたものである。(Means for Solving Problems) The present invention has been made in view of the fact that when using a light ben, constantly driving the LED to blink is a major cause of battery consumption.
すなわち、ライトペンの電池と、ＬＥＤを点滅駆動する
ための交流発振部との間にタイマ一部を設け、特定の周
波数ｆ１の交流信号での点滅駆動を間欠的に行うように
した光源駆動方法である。That is, a light source driving method in which a part of a timer is provided between the battery of the light pen and an AC oscillator for driving the LED to blink, and the blinking drive is performed intermittently using an AC signal of a specific frequency f1. It is.
（作 用）
タイマ一部から一定時間ごとに交流発振部にトリガーを
かけ間欠的に発振させ、この間欠交流信号を電力増幅部
にて増幅し、ＬＥＤを点滅させるものである（第２図（
ｂｌ参照）。(Function) The timer part triggers the AC oscillation unit at fixed time intervals to cause it to oscillate intermittently, and this intermittent AC signal is amplified by the power amplification unit, causing the LED to blink (see Figure 2).
(see bl).
（実施例）
第１図は本発明の光＃駆動方法を用いたライトペンのブ
ロック図を示す。(Embodiment) FIG. 1 shows a block diagram of a light pen using the optical drive method of the present invention.
電池７に接続されたタイマ一部１は、一定時間ごとに交
流発振部２にトリガーをがけ、該交流発振部２を間欠的
に発振させる。The timer section 1 connected to the battery 7 triggers the AC oscillating section 2 at regular intervals to cause the AC oscillating section 2 to oscillate intermittently.
この間欠交流信号を電力増幅部３で増幅し。This intermittent AC signal is amplified by a power amplification section 3.
ＬＥＤ４を点滅駆動させる。Drive LED4 to blink.
尚９周波数切換スイッチ６は、光タブレット８への入力
に際して複数個の周波数を選択できるようにするための
ものである。The 9-frequency changeover switch 6 is provided to enable selection of a plurality of frequencies when inputting to the optical tablet 8.
また、タイマ一部の時間設定は１間欠的発振による実効
値の低下と光タブレフトの性能を勘案して定められるも
のである。Further, the time setting of a part of the timer is determined by taking into consideration the reduction in effective value due to one intermittent oscillation and the performance of the optical tablet left.
たとえば１ｋＨｚの交流を１周期の内０．１ ｍｓだけ
発振させ０．９ｍｓの開停止させることにより、消費電
流を連続発振の場合の約１７１０にできる。For example, by oscillating a 1 kHz alternating current for 0.1 ms in one cycle and opening/stopping for 0.9 ms, the current consumption can be reduced to about 1710 compared to continuous oscillation.
（発明の効果）
本駆動方法を用いることにより、消費電力を大幅に減少
させることができ、また小容量の電池でまにあうためラ
イトペンが小形軽量化できる。(Effects of the Invention) By using the present driving method, power consumption can be significantly reduced, and the light pen can be made smaller and lighter because it can be done with a small-capacity battery.
第１図は本発明の駆動方式の一実施例のブロック図、第
２図ｆａｔは従来のＬＥＤ駆動電流波形。
同（ｂ）は本発明の電流、波形である。
１−タイマ一部、 ２・・−交流発振部。
３−電力増幅部、 ４− ＬＥＤ、 ５− ラ
イトペン、 ６−周波数切換スイッチ。FIG. 1 is a block diagram of an embodiment of the drive method of the present invention, and FIG. 2 fat is a conventional LED drive current waveform. (b) shows the current and waveform of the present invention. 1-timer part, 2...-AC oscillation part. 3-power amplification section, 4-LED, 5-light pen, 6-frequency selection switch.
Claims (1)
駆動方法。A light source driving method for an optical tablet that lights up a light source intermittently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60232102A JPS6292019A (en) | 1985-10-17 | 1985-10-17 | Driving method for light emitting source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60232102A JPS6292019A (en) | 1985-10-17 | 1985-10-17 | Driving method for light emitting source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6292019A true JPS6292019A (en) | 1987-04-27 |
Family
ID=16934036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60232102A Pending JPS6292019A (en) | 1985-10-17 | 1985-10-17 | Driving method for light emitting source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6292019A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019197410A (en) * | 2018-05-10 | 2019-11-14 | セイコーエプソン株式会社 | Operation device, position detection system, and control method for operation device |
-
1985
- 1985-10-17 JP JP60232102A patent/JPS6292019A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019197410A (en) * | 2018-05-10 | 2019-11-14 | セイコーエプソン株式会社 | Operation device, position detection system, and control method for operation device |
| US10775911B2 (en) | 2018-05-10 | 2020-09-15 | Seiko Epson Corporation | Operation device, position detection system, and method for controlling operation device |
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