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Method for controlling flash-lamp apparatus, wherein one preflashing is executed

A technology of flash and pre-flash, which is applied in the field of controlling flash equipment to perform pre-flash, and can solve problems such as reduced service life and increased power consumption of flash equipment

Inactive Publication Date: 2004-06-30
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to this typical control method, since at least two pre-flashes are required, the power consumption of the flash device FL increases and the service life decreases

Method used

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  • Method for controlling flash-lamp apparatus, wherein one preflashing is executed
  • Method for controlling flash-lamp apparatus, wherein one preflashing is executed
  • Method for controlling flash-lamp apparatus, wherein one preflashing is executed

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Embodiment Construction

[0020] refer to Figure 5 , The flash control device according to a preferred embodiment of the present invention includes an image sensing part IS, an image signal processing part SP, a timing signal generator TG, and a microcontroller MC.

[0021] The image sensing section IS includes a CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor), converts light energy from the object OB into electrical energy to generate an image signal proportional to the intensity of the camera flash. The image signal processing part SP processes the image signal from the image sensing part IS, and outputs the processed image signal to the microprocessor MC. The image signal processing section SP controls the operation of the timing generator TG.

[0022] The timing generator TG outputs a readout signal RS to the image sensing part IS and the microcontroller MC according to the timing control of the image signal processing part SP. refer to Image 6 , the rising point o...

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PUM

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Abstract

A flash apparatus to perform preliminary flashing, detect an average brightness of surroundings in synchronization with a periodic signal subsequent to the preliminary flashing, and set main flashing time according to the detected average brightness, is controlled by controlling the flash apparatus to start preliminary flashing at a point earlier than a first point at which either a rising edge or a falling edge of a first pulse of the periodic signal is generated, detecting a first average brightness of surroundings at the first point, controlling the flash apparatus to terminate the preliminary flashing at a point later than the first point, detecting a second average brightness of surroundings at a second point at which either a rising edge or a falling edge of a second pulse subsequent to the first pulse of the periodic signal is generated, setting the main flashing time according to the detected first and second average brightness, and controlling the flash apparatus to perform main flashing according to the set main flashing time.

Description

[0001] This application claims priority from Korean Patent Application No. 2002-80032 filed with the Korean Intellectual Property Office on December 14, 2002, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to a method for controlling a flashlight device, and more particularly, to a method for controlling a flashlight device to perform a pre-flash, which detects the average brightness of the surrounding environment synchronously with a periodic signal after the pre-flash, and based on detected to set the main flash time. Background technique [0003] FIG. 1 is a block diagram showing the structure of a typical flash control device of a camera. Referring to Fig. 1, a typical flash control device of a digital camera, such as a digital camera model "Digimax350SE" produced by Samsung Techwin Co., Ltd., includes an image detection part IS, an image signal processing part SP, a timing signal genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235
CPCH04N5/2351H04N5/2354H04N23/71H04N23/74H04N23/70
Inventor 李石根
Owner SAMSUNG ELECTRONICS CO LTD