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Flashing light controller and operatnig method thereof

A control device and flash technology, applied in the field of digital cameras, can solve the problems of reducing the maximum power of the main flash of the flash, the time difference between light metering and image acquisition, etc., and achieve the effect of avoiding overexposure or underexposure

Inactive Publication Date: 2004-12-08
KINPO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So U.S. Patent No. 6,441,856 and the patent of No. 6,359,651 will cause the following shortcoming: (1) because need make flashlight preflash, so can reduce the maximum energy that flashlight main flash can discharge; (2) because there is flashlight preflashing and The sequence of the main flash of the flash, so when shooting, it will cause a time difference between metering and image capture

Method used

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  • Flashing light controller and operatnig method thereof
  • Flashing light controller and operatnig method thereof
  • Flashing light controller and operatnig method thereof

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Embodiment Construction

[0046] Please refer to figure 1 , which is a block diagram of a flash control device according to a preferred embodiment of the present invention. The flashlight control device is suitable for digital cameras to control the amount of light emitted by the flashlight. Depend on figure 1 It can be seen that the flash control device 10 includes a charging device 102 , a charging voltage detection circuit 104 , a flash trigger circuit 106 , and a dimming circuit 108 . Next, the functions of the respective parts in the strobe control device 10 will be described.

[0047] The charging device 102 includes a charging circuit 116 and a capacitor 114 for receiving a charging enable signal (CHG_EN) sent by a central processing unit (not shown). Through the charging enabling signal (CHG_EN), the charging circuit 102 will be enabled, The capacitor 114 is charged, so that the capacitor 114 is charged to an expected charging voltage.

[0048] The charging voltage detection circuit 104 is ...

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Abstract

A device for controlling flash lamp and its method include following steps: the control device makes phototranslating for reflected light from the shot object through the light regulation circuit and outputs light-sensitive voltage. When the light-sensitive voltage is higher than the reference voltage, the flash lamp stop lighting to show the luminous quantity is enough, when the light-sensitive voltage is lower than the reference voltage, the flash lamp will shine continually to show the luminous quantity is not enough. Therefore, the flash control device doesn't need to make pre flashing, so can control the luminous quantity generated from flash precisely and fast.

Description

technical field [0001] The present invention relates to a digital camera, and in particular to a flash control device used in the digital camera and its operating method. Background technique [0002] At present, since digital cameras are becoming thinner, lighter, smaller and easier to use, the usage rate has become more and more common. However, when shooting an object with a digital camera, if the brightness of the external environment is insufficient and a flash is required, the flash must be pre-flashed and main flashed (that is, the flash must be flashed twice). Decreases the performance of captured photos. [0003] For example, in US Pat. No. 6,441,856 and US Pat. No. 6,359,651, the brightness of the subject is judged by the flash pre-flash, and then the amount of light emitted by the main flash of the flash is determined according to the brightness. So U.S. Patent No. 6,441,856 and the patent of No. 6,359,651 will cause the following shortcoming: (1) because need m...

Claims

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Application Information

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IPC IPC(8): G03B7/08H05B41/30
Inventor 王心恕
Owner KINPO ELECTRONICS
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