JPS63768B2 - - Google Patents
Info
- Publication number
- JPS63768B2 JPS63768B2 JP52008503A JP850377A JPS63768B2 JP S63768 B2 JPS63768 B2 JP S63768B2 JP 52008503 A JP52008503 A JP 52008503A JP 850377 A JP850377 A JP 850377A JP S63768 B2 JPS63768 B2 JP S63768B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal plate
- light distribution
- electrodes
- region
- 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
Landscapes
- Liquid Crystal (AREA)
- Optical Elements Other Than Lenses (AREA)
- Stroboscope Apparatuses (AREA)
Description
【発明の詳細な説明】
本発明は、発光照射角度が液晶拡散板等の光拡
散素子によつて制御される発光部を有した電子閃
光装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic flash device having a light emitting section whose light emission angle is controlled by a light diffusion element such as a liquid crystal diffusion plate.
閃光放電管と反射傘とからなる発光部の前面に
液晶板を配設して発光照射角度を可変する従来装
置として特開昭48−52226号公報にみられるもの
がある。 Japanese Patent Laid-Open No. 48-52226 discloses a conventional device in which a liquid crystal plate is disposed in front of a light emitting unit consisting of a flash discharge tube and a reflector to vary the angle of light emission.
このものは第１図に示すように液晶板１が放物
反射面を有した反射傘２を覆うように光の放射部
全面にわたつて取付けられており、光の放射部よ
りの閃光放電管４によるビーム光束３は液晶板１
によつて完全拡散され、配光特性は第２図に示す
ように電極５，５′に電圧を印加しない透明な場
合はＡのようになり、電極５，５′にある大きさ
の値の電圧を印加した場合にはＢのようになり、
電極５，５′へ印加する電圧の大きさを制御する
ことにより異なつた角度の配光特性を得ることが
できる。 As shown in Fig. 1, a liquid crystal plate 1 is installed over the entire surface of the light emitting part so as to cover a reflective umbrella 2 having a parabolic reflecting surface, and a flash discharge tube from the light emitting part is attached. The beam 3 due to 4 is the liquid crystal plate 1
As shown in Figure 2, the light distribution characteristics are as shown in A in the transparent case where no voltage is applied to the electrodes 5 and 5', and the light distribution characteristics are as shown in A when the voltage is applied to the electrodes 5 and 5'. When voltage is applied, it becomes like B,
By controlling the magnitude of the voltage applied to the electrodes 5, 5', light distribution characteristics at different angles can be obtained.
しかしながらこの装置によつて得られる配光特
性は、尖つた形状から偏平な形状の山形形状だけ
のものしか得られず、種々の配光特性を得ること
はできなかつた。 However, the light distribution characteristics that can be obtained with this device are only those in a chevron shape ranging from a pointed shape to a flat shape, and it has not been possible to obtain various light distribution characteristics.
従つて、本発明は、上記問題点を解決するため
になされたもので、以下これを図面とともに説明
する。 Therefore, the present invention has been made to solve the above problems, and will be explained below with reference to the drawings.
第３図は本発明の一実施例を示し、図ａは前記
発光部の断面図、図ｂは液晶板１′の正面図であ
り、第４図、第５図は配光特性を示す。 FIG. 3 shows an embodiment of the present invention, FIG. 3A is a sectional view of the light emitting section, FIG. B is a front view of the liquid crystal plate 1', and FIGS. 4 and 5 show light distribution characteristics.
第３図ａ，ｂにおいて反射傘前面に設けられた
液晶板１′の両面に形成される電極５，５′の一方
は共通電極に使用され、他方には第１領域６、第
２領域７、第３領域８、第４領域９の電極が分割
されて設けられ、夫々の領域の電極はスイツチ
SW1，SW2，SW3，SW4を介して電源１０に接続
されるようになされている。 In FIGS. 3a and 3b, one of the electrodes 5 and 5' formed on both sides of the liquid crystal plate 1' provided on the front surface of the reflector is used as a common electrode, and the other has a first area 6 and a second area 7. , the electrodes of the third region 8 and the fourth region 9 are provided separately, and the electrodes of each region are connected to a switch.
It is connected to the power supply 10 via SW 1 , SW 2 , SW 3 , and SW 4 .
今、スイツチSW1〜SW4はオフで電源１０を印
加しない場合には、閃光放電管４からの光束は第
４図Ａのような配光特性となり、次いでスイツチ
SW1をオンし、第１の領域６に電圧を印加する
と、その配光特性は若干光拡散された第４図Ｂの
ようになり、スイツチSW1とSW2をオンし、第１
の領域６と第２の領域７に電圧を印加すると、同
図Ｃで示される配光特性になり、またスイツチ
SW1，SW2，SW3をオンすると、同図Ｄで示され
る配光特性になり、全てのスイツチSW1〜SW4を
オンすると、同図Ｅの配光特性となる。又、例え
ばスイツチSW2だけをオンすると、第５図Ｆのよ
うな変化のある配光特性を得ることができる。 Now, when the switches SW 1 to SW 4 are off and the power supply 10 is not applied, the luminous flux from the flash discharge tube 4 has a light distribution characteristic as shown in Fig. 4A, and then the switch
When SW 1 is turned on and a voltage is applied to the first region 6, the light distribution characteristics become slightly diffused as shown in FIG . 4B .
When a voltage is applied to the region 6 and the second region 7, the light distribution characteristics shown by C in the same figure are obtained, and the switch
When SW 1 , SW 2 , and SW 3 are turned on, the light distribution characteristic shown in FIG. Furthermore, for example, by turning on only the switch SW2 , it is possible to obtain light distribution characteristics that vary as shown in FIG. 5F.
以上説明したように、本発明は、液晶板に部分
的に光拡散する領域の電極を複数個設け、この複
数個の電極への電圧印加をスイツチにより制御す
ることにより種々の形態の配光特性を得ることが
できる電子閃光装置を提供することができる。 As explained above, the present invention provides a liquid crystal panel with a plurality of electrodes in areas where light is partially diffused, and controls voltage application to the plurality of electrodes with a switch, thereby creating light distribution characteristics of various forms. It is possible to provide an electronic flash device that can obtain the following.
第１図は液晶板を使用した発光部の従来例の断
面図、第２図は従来例による配光特性図、第３図
ａは本発明の電子閃光装置の実施例の要部断面
図、第３図ｂは第３図ａに係る液晶板の正面図お
よび電気回路図、第４図、第５図は第３図ａ，ｂ
の実施例による配光特性図である。
１′……液晶板、２……反射傘、４……閃光放
電管、５，５′……電極、６……第１領域の電極、
７……第２領域の電極、８……第３領域の電極、
９……第４領域の電極、１０……電源、SW1，
SW2，SW3，SW4……スイツチ。
FIG. 1 is a sectional view of a conventional example of a light emitting unit using a liquid crystal plate, FIG. 2 is a light distribution characteristic diagram of the conventional example, and FIG. Figure 3b is a front view and electric circuit diagram of the liquid crystal panel according to Figure 3a, Figures 4 and 5 are Figures 3a and b.
It is a light distribution characteristic diagram by an Example. 1'... Liquid crystal plate, 2... Reflector, 4... Flash discharge tube, 5, 5'... Electrode, 6... First area electrode,
7... Electrode in the second region, 8... Electrode in the third region,
9... Electrode of the fourth region, 10... Power supply, SW 1 ,
SW 2 , SW 3 , SW 4 ...Switch.
Claims (1)
射させる反射傘と、前記反射傘の前面部を覆うよ
うに配置される液晶板と、前記液晶板の一方の面
に相異なる複数の形状で形成される複数個の電極
と、前記液晶板の他面に形成される共通電極と、
電源と、前記複数個の電極のいずれかと前記共通
電極とに前記電源を選択的に電気接続するスイツ
チとを備えてなる電子閃光装置。1. A flash discharge tube, a reflector that reflects light from the flash discharge tube, a liquid crystal plate disposed to cover the front surface of the reflector, and a plurality of different shapes on one surface of the liquid crystal plate. a common electrode formed on the other surface of the liquid crystal plate;
An electronic flash device comprising: a power source; and a switch for selectively electrically connecting the power source to one of the plurality of electrodes and the common electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP850377A JPS5397819A (en) | 1977-01-27 | 1977-01-27 | Electrooflashing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP850377A JPS5397819A (en) | 1977-01-27 | 1977-01-27 | Electrooflashing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5397819A JPS5397819A (en) | 1978-08-26 |
| JPS63768B2 true JPS63768B2 (en) | 1988-01-08 |
Family
ID=11694908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP850377A Granted JPS5397819A (en) | 1977-01-27 | 1977-01-27 | Electrooflashing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5397819A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6321633A (en) * | 1986-07-15 | 1988-01-29 | Stanley Electric Co Ltd | Varying device for irradiation angle of projector |
| JP4596862B2 (en) * | 2004-09-02 | 2010-12-15 | シチズン電子株式会社 | Strobe device and camera equipped with the same |
| JP6428276B2 (en) * | 2015-01-09 | 2018-11-28 | リコーイメージング株式会社 | Light distribution device and flash device provided with the same |
-
1977
- 1977-01-27 JP JP850377A patent/JPS5397819A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5397819A (en) | 1978-08-26 |
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