Control circuit of automatic light-changing welding mask
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A welding mask and control circuit technology, applied in eye masks, ophthalmic surgery, instruments, etc., can solve the problems of sensitivity, lack of brightness adjustment, uneven quality, long response time, etc., to achieve convenient adjustment and setting, improve production efficiency, eliminate The effect of electro-optic ophthalmia
Active Publication Date: 2020-04-10
江苏江翔光电科技有限公司
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Problems solved by technology
At present, the quality of products produced by domestic manufacturers is uneven. In addition to long response time, sensitivity and brightness adjustment are also relatively lacking. Therefore, domestic welding masks need to be further improved. Avoid damage to the eyes caused by strong welding light, and prevent the occurrence of electro-optic ophthalmia
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Embodiment 1
[0074] Example 1, the power supply voltage regulator circuit adopts the low power consumption linear voltage regulator chip U5 to reduce the power consumption caused by voltage regulation; as shown in the figure, T+ and T- are respectively connected to the positive and negative poles of the solar cell, and only when When there is light, the whole machine enters the working state, which further reduces the useless loss of battery power; the switch W1B adopts a resistance switch two-in-one potentiometer, and the switch of W1B can manually cut off the output of the voltage regulator chip.
Embodiment 2
[0075] Embodiment 2, the battery under-voltage reminder circuit adopts a dedicated low-voltage detection chip, and the low-voltage detection chip U7 adopts the chip XC61CC2502MR. When the voltage supplied to the chip is insufficient, the LED will light up to remind the user to replace the battery.
Embodiment 3
[0076] Embodiment 3, the photoelectric conversion circuit is composed of infrared photodiodes, and converts the infrared light signal in the welding light into an electrical signal, so that the following circuit can drive the LCD black screen in time, and protect the welder's naked eyes from strong light.
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Abstract
The invention discloses a control circuit of an automatic light-changing welding mask. The control circuit of an automatic light-changing welding mask provided by the invention comprises: a power supply circuit, a photoelectric conversion circuit, a signal conditioning circuit, an LCD driving frequency and driving sequential circuit, an LCD driving voltage regulating circuit, an LCD driving circuit, a positive and negative voltage conversion circuit, and a negative voltage doubling circuit. According to the invention, through cooperation of the power supply circuit, the photoelectric conversion circuit, the signal conditioning circuit, the LCD driving frequency and driving sequential circuit, the LCD driving voltage regulating circuit, the LCD driving circuit, the positive and negative voltage conversion circuit and the negative voltage doubling circuit, the higher the driving voltage is, the larger the darkness is, and meanwhile in cooperation with high pulse voltage with very generation short time, the LCD can respond quickly, therefore, the harm of strong welding light to eyes of an electric welder can be avoided during operation, electric ophthalmia is completely eradicated, the adjustment and setting are convenient, and the production efficiency is further improved.
Description
technical field [0001] The invention relates to the technical field of welding masks, in particular to a control circuit of an automatic darkening welding mask. Background technique [0002] An extremely important parameter for auto-dimming welding masks is the response time, which is defined as the time from when the mask photoreceptor captures the welding light to when it drives the LCD screen to dim. The time parameter directly determines the comfort of the eyes of the welder and the degree of damage to the human face and eyes caused by harmful light. At present, the quality of products produced by domestic manufacturers is uneven. In addition to the long response time, sensitivity and brightness adjustment are also relatively lacking. Therefore, domestic welding masks need to be further improved for users who jump out of the low-end, and can enter the high-end professional market. Avoid the damage to the eyes caused by the strong light of welding, and prevent the occurr...
Claims
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Application Information
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