US 2004/0071458 A1 · Camera

Abstract

A computation expression is stored by which an emission time period for obtaining a predetermined amount of emitted light is obtained by using temperature as a variable. An emission time period is obtained from a temperature on the basis of this computation expression. When a red-eye prevention mode is selected and when preliminary light emission and main light emission are performed continuously, the emission time period for main light emission is adjusted by detecting the voltage across a main capacitor through a voltage monitor. If a reference emission time period Tf is shorter than a predetermined time period of 30 μsec, the emission time is adjusted according to information including t0 corresponding to an emission delay time.

Claims9

Dependent claims

A camera which takes a picture of a subject, the camera comprising:

a flash emission device which emits flashing light in synchronization with a picture-taking operation, and which controls the amount of emitted light by selecting an emission time period, the flash emission device having:
a temperature sensor which detects temperature;
a storage section which stores a computation expression by which an emission time period for obtaining a predetermined amount of emitted light is obtained by using temperature as a variable;
and
an emission control section which obtains an emission time period from the temperature obtained from the temperature sensor on the basis of the computation expression, and which controls the emission time period so that light is emitted only for the obtained emission time period.

2 more elements

Dependencies are inferred from the claim text.

Camera

Life of this patent

Camera

Life of this patent

Abstract

Claims9