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Stroboflash-free eye protection table lamp control system

A control system and flicker-free technology, which is applied in the field of flicker-free systems, can solve the problems of not necessarily accurate, accurate judgment of stroboscopic depth, more severe stroboscopic, etc., and achieve the effect of solving desk lamp stroboscopic and easy adjustment

Pending Publication Date: 2020-04-10
苏州优童智能科技有限公司
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] The flicker-free system is a system that realizes the flicker-free effect of the LED eye protection desk lamp. The current technology of the flicker-free LED eye protection desk lamp is actually to solve the problem of the strobe frequency from the power supply level. The ultra-high frequency The human eye will not feel flickering, and the low-frequency human eye will have an intuitive feeling. To realize the LED eye protection desk lamp without stroboscopic, or to do the mainstream output of ultra-high frequency (this solution still has stroboscopic, but the human eye cannot observe it. ), and another is to really remove or reduce the frequency fluctuation in DC, that is, the ripple content. The stroboscopic and stroboscopic effects are aimed at electric light sources, the fluctuating depth of luminous flux and the resulting harmful effects (called stroboscopic Effect) size of two mutually causal physical quantities, stroboscopic refers to the depth of luminous flux fluctuations of electric light sources, the greater the depth of luminous flux fluctuations, the more serious stroboscopic, the existing stroboscopic measurement method: the stroboscopic ratio is equal to within one switching cycle The difference between the maximum light output and the minimum light output is divided by the sum of the maximum light output and the minimum light output. The stroboscopic index is equal to the amount exceeding the average light output in one switching cycle divided by the total light output. Human eyes are not sensitive to flicker above 60Hz Sensitive, the power frequency of the output terminal of LED constant current power supply is generally 100Hz and above. When shooting with CCD photosensitive imaging (mobile phone, camera), water ripples will appear due to the difference in sampling frequency, but it is different from the default settings of mobile phones and cameras. Frequency, photosensitive element, and shutter speed are all related, so this test method is not necessarily accurate, but it is a simple test method.
[0003] The traditional test method is: turn the black and white gyroscope under sunlight, the pattern will form a stable ring shape, and the color ring will not change with the rotation speed and direction, and turn the black and white gyroscope under the tested light Instrument, observe the phenomenon: if the color of the pattern or the ring structure changes, it means that there is stroboscopic light, and the more obvious the change, the stronger the stroboscopic. This method cannot make an accurate judgment on the depth of stroboscopic, the most scientific test method Yes: Use Light Flickering Analyzer, the core of which is an ultra-fast photometer with a sampling frequency of 10kS / s (testing 10,000 times per second), to scan the luminous curve of luminous objects (similar to an oscilloscope), and Calculate the flicker index and other parameters to get the fluctuation depth of light (light ripple coefficient), and there is no need for stroboscopic flicker. There is no uniform standard in the market to strictly require the stroboscopic depth of the light source. At present, some customers require the fluctuation depth to be <8%, some require <5%, and some even require <1%.
[0004] There are certain disadvantages in the use of the existing non-stroboscopic system. After the brightness adjustment of the existing LED, the luminous intensity of the LED desk lamp fluctuates, which is the stroboscopic problem of the LED desk lamp, and the depth of the luminous intensity fluctuation shown The feeling of strobe is different because of the difference of the light source. When the fluctuation depth of the luminous intensity is very large, the human eye can clearly feel the flicker of the LED desk lamp. Everyone has different sensitivity to the strobe. At 50Hz, some people will not notice it until 100Hz, but at 3-70Hz low-frequency flicker can cause adverse chain reactions for high-sensitivity people, and there is also a problem with non-video flicker greater than 100Hz, because between 100~70Hz Moderate stroboscopic flicker at 500Hz may also cause indirect perception of stroboscopic effect, such as eye muscle tension, fatigue, and even accompanied by symptoms such as headache, physical and mental exhaustion, vision loss, and photosensitive epilepsy. Disease, distraction, autism and other conditions, the harmfulness of light source flicker to human body is worthy of vigilance. Therefore, we propose a flicker-free eye protection desk lamp control system

Method used

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Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: A kind of flicker-free eye protection table lamp control system, such as figure 1 As shown, it includes the micro control unit module, the micro control unit module is electrically connected with the LCD display module, the touch key module, the power management module, the LED light source driver module, the learning time timing module, the sitting posture adjustment module, and the power management module is one-way electrical The LED light source is connected to the LED light source, and the LED light source is electrically connected to the LED light source drive module in two directions. The output end of the micro control unit module is electrically connected to the input end of the LCD display module and the touch button module, and the micro control unit module is connected to the sitting posture adjustment module and learning time. The timing module and the LED light source drive module are electrically connected in two directions, the output end of t...

Embodiment 2

[0029] Embodiment 2: A kind of flicker-free eye protection desk lamp control system, such as figure 2 , 3 As shown, the LED light source driver module includes LED driver chip U1, step-down chip U2, pulse width modulation signal PWM, LED light source adjustment D, and power input module. The power input module is connected to the step-down chip U2, and one end of the step-down chip U2 is connected to a Pulse width modulation signal PWM, the other end of the step-down chip U2 is connected to a 0-10V voltage output and connected to the LED driver chip U1, the LED driver chip U1 is connected to the LED light source regulator D, the output of the power input module is connected to the input of the step-down chip U2 The terminals are electrically connected, the output terminal of the FB port of the step-down chip U2 is electrically connected to the input terminal of the pulse width modulation signal PWM, and the output terminals of the BST, SW, and FB ports of the step-down chip U...

Embodiment 3

[0030] Embodiment 3: A kind of flicker-free eye protection desk lamp control system, such as Figure 4 As shown, another structure of LED light source driver module includes digital potentiometer AD5231, 15V voltage input, 5V voltage input, signal amplifier A1, 0-10V voltage output, LED driver chip U1, LED light source adjustment D, 5V voltage input connection There is digital potentiometer AD5231, 15V voltage input is connected to signal amplifier A1, digital potentiometer AD5231 is connected to signal amplifier A1, signal amplifier A1 is connected to LED driver chip U1, LED driver chip U1 is connected to LED light source adjustment D, 5V voltage input The output terminal is electrically connected to the input terminal of the digital potentiometer AD5231, the output terminal of the 15V voltage input is electrically connected to the input terminal of the signal amplifier A1, the output terminal of the digital potentiometer AD5231 is electrically connected to the input terminal ...

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Abstract

The invention discloses a stroboflash-free eye protection table lamp control system. The system comprises a micro-control unit module, and the micro-control unit module is electrically connected withan LCD display module, a touch key module, a power supply management module, an LED light source driving module, a learning time timing module and a sitting posture adjusting module. The power supplymanagement module is unidirectionally and electrically connected with an LED light source, and the LED light source is bidirectionally and electrically connected with the LED light source driving module. The stroboflash-free eye protection table lamp control system is equipped with an LED light source module, a stroboflash-free LED driving module and a stroboflash test module, the stroboflash problem of an LED eye protection table lamp can be well solved; after the brightness and the color temperature of the LED desk lamp are adjusted, the fluctuation depth of the luminous intensity of the LEDeye protection desk lamp is small, the change of the brightness is small, and the stroboflash-free effect can be basically achieved; the test measurement of the fluctuation depth and a stroboflash curve can be completed by a low-cost method, and a better use prospect is brought.

Description

technical field [0001] The invention relates to the field of flicker-free systems, in particular to a flicker-free eye protection desk lamp control system. Background technique [0002] The flicker-free system is a system that realizes the flicker-free effect of the LED eye protection desk lamp. The current technology of the flicker-free LED eye protection desk lamp is actually to solve the problem of the strobe frequency from the power supply level. The ultra-high frequency The human eye will not feel flickering, and the low-frequency human eye will have an intuitive feeling. To realize the LED eye protection desk lamp without stroboscopic, or to do the mainstream output of ultra-high frequency (this solution still has stroboscopic, but the human eye cannot observe it. ), and another is to really remove or reduce the frequency fluctuation in DC, that is, the ripple content. The stroboscopic and stroboscopic effects are aimed at electric light sources, the fluctuating depth ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B45/325H05B45/20H05B45/10
CPCY02B20/30Y02B20/40
Inventor 查春锋楚文超
Owner 苏州优童智能科技有限公司
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