Claims
- 1. A flash device, comprising:
- (a) a power source battery;
- (b) a booster circuit for boosting the output of said power source battery;
- (c) a capacitor arranged to be charged with the output of said booster circuit;
- (d) a flash discharge tube connected in parallel to said capacitor;
- (e) a light measurement circuit arranged to measure a relfection light resulting from flashing by said flash discharge tube and coming from an object to be photographed; and
- (f) a processing circuit arranged to perform exposure control on the basis of the output of said light measurement circuit, said processing circuit including a voltage source, said voltage source being arranged to be charged with the output of said power source battery and being connected to said capacitor to supply a charging current of the capacitor to said voltage source.
- 2. A flash device according to claim 1, wherein there is provided a second capacitor which is series connected to the parallel circuit of said flash discharge tube and said capacitor; and a connection point between the second capacitor and said parallel circuit is connected to said voltage source.
- 3. A flash device, comprising:
- (a) a power source circuit;
- (b) a booster circuit for boosting the output of said power source circuit;
- (c) a capacitor arranged to be charged with the output of said booster circuit;
- (d) a flash discharge tube connected in parallel to said capacitor; and
- (e) a processing circuit for controlling a flash photography exposure, said circuit being connected to said power source circuit and said capacitor to be supplied with an output of said power source circuit, and also supplied with the charging current passing to the capacitor during the charging to said capacitor by said booster circuit.
Priority Claims (3)
Number |
Date |
Country |
Kind |
56-196031 |
Dec 1981 |
JPX |
|
56-207685 |
Dec 1981 |
JPX |
|
57-1904 |
Jan 1982 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 636,851, filed Aug. 1, 1984, now abandoned, which was a divisional of application Ser. No. 444,214, filed Nov. 24, 1982, now U.S. Pat. No. 4,501,481.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4354750 |
Hasegawa et al. |
Oct 1982 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
444214 |
Nov 1982 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
636851 |
Aug 1984 |
|