A control method for charging circuit of shooting lamp
A technology of a charging circuit and a control method, which is applied to battery circuit devices, lamp circuit layout, photography, etc., can solve the problems that the accuracy cannot meet the requirements of professional photography, and achieve the effect of precise adjustment and high adjustment accuracy
Inactive Publication Date: 2008-01-16
周耀波
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Problems solved by technology
However, due to changes in the weather and the intensity of the surrounding light sources, it is often necessary to constantly change the flash output intensity of the photography light in order to capture satisfactory photos. Especially in professional photography, the exposure requirements for photos are very strict and precise , which requires the flash output intensity of the photographic light to be very precise, but the flash output intensity of the existing photographic light can only be adjusted in 5 steps at most, and the accuracy obviously cannot meet the requirements of professional photography
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[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0035] As shown in Figure 1, the photography lamp of the present invention at least includes a main control circuit, a power supply circuit connected to the main control circuit, a charging circuit, and a flash output control circuit, wherein the charging circuit includes a thyristor and a main capacitor, After the power supply circuit inputs 220V AC, the main control circuit is used to execute a program code. The flash output control signal collected by the flash output control circuit triggers the conduction of the thyristor, and controls the output voltage value of the thyristor in the charging circuit. The output voltage after the silicon is turned on charges the main capacitor of the charging circuit. After the photography light is started synchronously, the main capacitor will discharge to produce strong light, so as to achieve the purpos...
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A control method for charging circuit of photoflood lamp at least includes a primary control circuit, and a charging circuit connected with the primary control circuit; the method is characterized in that a flash output control circuit and a LED double-digit number display are connected with the primary control circuit. The primary control circuit is used for executing a program code to control output voltage of a silicon controlled rectifier in the charging circuit. The number displayed by the LED double-digit number display in the primary control circuit represents shift of the output voltage value of the silicon controlled rectifier, the LED double-digit number display can display at least ten shifts and represent the shifts with a double-digit number. Compared with the prior art, the invention has the advantages of that, by setting 75 shifts with the LED double-digit number display to control output voltage value of the silicon controlled rectifier, a precision for output voltage regulation (3 V per shift) can be achieved; therefore flash output intensity regulating precision is high enough to satisfy requirement of professional photograph for precise regulation of flash output value of photoflood lamp.
Description
technical field [0001] The invention relates to a method for controlling a charging circuit of a photography lamp. Background technique [0002] The size of the flash output of the photographic light directly affects the exposure effect of photographic pictures. The flash output of the photographic light is mainly expressed as the light intensity of the photographic light, that is, the output power of the photographic light. When the conventional photographic capture device captures an image with a dark ambient light source, it uses a photographic light to enhance the brightness. However, the light intensity output by the early photographic lights is fixed, that is, no matter whether the surrounding light source is strong or weak, and the distance of the image is far or near, it will emit a certain intensity of light. Therefore, the fixed intensity of the flash makes the brightness and contrast of the image captured It often does not have a good flash effect as expected by ...
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IPC IPC(8): H05B37/02F21S10/06G03B15/03H02J7/00
Inventor 周耀波
Owner 周耀波