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08-06-2012
How to choose and buy high power LED flashlight
The Led Flashlight is making LED (light emitting diode) as light source of a new type of flashlight. Because Led with high brightness , low power consumption, long life, small size and other characteristics, so it a ideal choice for carry-on lighting .
Shining Theory of LED
Atom electronic have many level, when electronic from a higher level low level to warp, electronic energy was reduced, and reduce the energy is transformed into photon emission out. A large number of these photons is laser.
LED principle similar. But the difference is, the LED and not through the atomic internal electronic leap to change to shine, but through the voltage and the PN junction in LED at both ends, make PN junction form a level itself (in fact, is a series of level), and then in the electronic energy leap to change and produce the photon to shine.
1, See the number of led,the quantity should be moderate.The Household Led Flashligh don't use more than 12 pcs of lED, use the battery in 2 ~ 3 quarter for good, Of course, high Power Led Flashlight generally can't reach the number of 12 star.
2,See the welding,the welding should be firm. Each diode is welding connection in the circuit board, if there is virtual welding contact then it will be bad which may cause DianZhu not bright or affect whole to use.
3, See the battery, there are common battery and lithium electricity two kinds, although the lithium electricity for rechargeable battery, but life expectancy is about 2 years, according to actual situation to choose
4,See the brightness, good Led Flashlight has high brightness and slow attenuation.
5,See the light bulb,when the light bulb out of the light, the naked eye is difficult to distinguish between good and bad,you we see can the consistency of light bulb in the light.
6, See the waterproof, good Led Flashlight have waterproof function, the seismic performance is good, resistant to fall. Because it belongs to the electronic products, flashlight front have a circuit board, once the water prone to short circuit, cause damage.
7,See aperture, good Led Flashlight's aperture has a uniform circle, the bad Led Flashlight's aperture flare into yellow and blue two color . When you buy Led Flashlight you should pay attention to the itmes whether has astigmatism phenomenon.
8, See the appearance, can choose al-alloy shell, it's beauty and generous.
1,Led long service life and generally can be up to five to 100000 hours, than traditional tengsten lamp life is 5 ~ 10 times.
2,Cold light, low heat, not damage the lamp holder, high safety.
3 Fast reaction speed, bear the collision, good cold, volume is small, easy small lightweight.
4,Save electricity, energy saving, low power consumption, green environmental protection material.
5 and reaction speed as long as 1 us (us), need warm lamp can improve the safety degree.
6,Low voltage driver (voltage of 1.8 ~ 4.0 V) security.
CGG News:Necessary Knowledge Collection of Solar Charger
Solar Charger
Solar charger is to convert solar energy to electricity and store into the battery, the battery can be for any form of storage electric device, mainly for the lead-acid battery, lithium batteries, the nimh batteries, load can be a cell phone digital products, the load is diversity.
Solar chargeris a new high-tech solar series products, with intelligent adjustment function, can adjust different output voltage and current. Can to different charging products charging, adjust voltage from 3.7-6 V range, can to MP3, MP4, PDA, digital camera, cell phone charging products. With five star highlight five LED, can be used for daily lighting and emergency lighting! And small size, high capacity, service life long advantages. It is used in travel, tourism, long distance bus ship, outdoor work and so on environment and student's backup power supply and emergency illumination, have safety protection and good compatibility, large capacity, small volume, long service life, high performance/price ratio. Function parameters solar panels specification: 5.5 V / 70 mA 1, high capacity rechargeable battery: 1300 MAH 2, output voltage: voltage of 5.5 V 3, output current: 300-550 mA; 4, the charger to cell phone charging time: about 120 minutes (different brands and models of the phone has a little difference); 5, the solar energy to the battery charger built-in time: 10 ~ 15 hours; 6, using computer or ac adapter to charger built-in battery time: 5 hours;
Products Applicable Scope
Solar charger can be applied to charge voltage in 3.7 ~ 6 V range between different charging products and electronic digital mobile devices. To meet mobile equipment needed parameters of voltage and current disagreed. Must be targeted charging products and electronic digital mobile equipment voltage to choose the proper voltage to the charging again after charging products. Ensure that charging stability and battery life. Solar charger are free plug, as many as 20 kind of interface to choose from. And the majority of the phone (iPhone, blackberry), GPS receiver, special cluster mobile communication device, digital camera, mp3/4 player etc products compatible, charging adapter scope. I easy series products gain "for the iPod/iPhone" the authentication [1].
Type of Solar Charger
Type 1,Solar charger with lighting function , built-in energy-saving super LED lights, very electricity-saving. If simple used in LED lighting, according to the built-in battery capacity size can use 3 hours to 30 hours.
Type 2, Solar charger with only charge function , the charger with no any other function expansion. The advantage is that type charger has huge capacity, very suitable for professional external power supply.
Type 3, Solar charger with supporting power to be adjusted. At present general support 5 v, 9 v can be adjusted.
The United States, Aaron, institute of technology researchers 2008 years to develop a new coating, it will be covered in solar panels can make the latter sunshine absorption rate increased from 96.2% to, while ordinary solar panels sunshine absorption rate is only 70% or so.
New coating mainly to solve the two difficult technical problems, a solar panels is to help absorb almost all of the solar spectrum, 2 it is to make solar panels absorb more of the Angle from the sun, so as to enhance the efficiency of solar panels absorb the light from the sun.
Ordinary solar panels can usually absorption spectra of the sun, and usually only in the light of the sun point-blank absorption when high work efficiency, so many solar devices all equipped with automatic adjustment system, in order to ensure that the solar panels and the sun always keep the most beneficial to absorb the Angle of energy.
Principle
cell phone solar chargers' principle is to convert solar energy into power and store insied cell phone Solar charger.
Inside built-in battery, when cell phone is in need of charging, cell phone Solar charger will output electricity to charge for cell phone battery.
Application Scope
Cell phone, digital camera, PDA, MP3, MP4 and other digital products (high-power can give notebook power supply)
Solar cell phone chargers 's quality depends on the four points:
First, the use efficiency. Use efficiency include two aspects: solar panels of the efficiency of conversion efficiency of conversion and secondary. Solar panels of the efficiency of conversion, just as its name implies is to point to light energy into electrical energy efficiency; And second conversion efficiency refers to light energy into electrical energy in, stored in the efficiency of the battery.
Second, storage battery quality and capacity. The capacity of the battery general for your cell phone battery 1.2 times. Solar built-in lithium battery discharge to cell phones, digital products, energy conversion process will have energy losses, 80%-90% conversion rates generally, battery so solar energy hair of electricity is enough your cell phone use, so the big battery can make you cell phone batteries. And the quality of the battery is also about to Solar charger using life.
Third, the control circuit and the protection circuit. The market now in the solar mobile charger product is very complex, it protection circuit and control circuit may be simple design, or in the compatibility is poor, easy to cut short the mobile phone or bad filling in mobile phone and the life of the battery. So the control circuit and the protection of circuit design is important.
Fourth, Solar charger accessories. The problem often is often ignored by many users, the but again not allow to ignore. The market price advantage to have bad suppliers and configuration inferior fittings, such as AC charger (local fire cattle), AC charger with IC protection circuit or no IC protection circuit two paragraphs. No protection IC's AC charger not only charge current small, charging time long the effect not beautiful, and save all the hidden trouble. The choose and buy when Solar charger should pay special attention to, AC charger is also a circuit protection IC.
Solar cell phone chargers can only be used when the emergency, can't depend entirely on it to cell phone, digital products charging, to achieve a completely to cell phone charging words, general mobile phones need of solar cell phone chargers the solar panels more than 0.7 W.
Notes:
Can't charge under the strong light inconsistently(direct solar panel).About eight hours, can be filled with built-in battery.
Do not put the charger in car in the summer which will(the inside temperature too high.) affect battery service life.
Please do not across the glass to charge since charging effect is poor across glass.
Must be in the strong light charging, the charger is light in low light, (Light1)just can detected has light but not been charging. So don't charge under the weak light.
Due to out of factory each time, each charger included not consistent power, so, the first time use charging or discharge time will be different.
Do not use corrosive solution to wipe the machine, in order to avoid damage of this product.
It is strictly prohibited to the products to the fire, lest cause an explosion.
Sunglasses , also named sunshade mirror, the use of shading. People in the sunshine will depend on the size of the pupil to adjust the flux, when the light intensity over the human eye adjust ability, will cause damage to the human eye. So in the outdoor activity places, especially in the summer, many people are using the sunshade mirror to keep out sunshine, in order to reduce eyes fatigue caused by adjusing and the stimulation damage cause from the strong light.
Sunglasses plays the role of shading and is also a kind of a eyesight health supplies to prevent damage to the human eyes caused by sunlight intense stimulation . As people raise the level of material culture, sunglasses becomes the sepecial adorn article of beauty and from it can reflecting personal style.
Because the surface of the earth's sunshine contains ultraviolet ray, the human's eye cornea and crystal is the most vulnerable eye tissues cauded by ultraviolet ray, and "cataract" is the the eye disease closely related with eyes. Due to the environmental damage to the depletion of the ozone layer, and the increase of people summer outdoor activities,uv damage can not be neglected by human. Wearing sunglasses is a good way to protect the eye from uv damage, but to pay special attention to the choice of sunglasses.
According to the provisions of the international standard, sunglasses is listed as personal eye protection products category, because people wear sunglasses specially in the summer , the main function is to keep out dazzling sunlight. However, the international standard and sunglasses subdivided into "fashion glasses " and "general purpose glasses. The standard of "fashion glasses " quality demand is low. Because "fashion glasses " main outstanding is style, the wearer attention is adornment, not protecting functions. The standard of "general purpose use mirror," the quality requirements are more severe, including the uv protection, and d and prism degree index requirements.
Basic Functions:
A pair of sunglasses appears to be very simple, also is in a plastic or metal frame has two pieces of glass or plastic covering the color. Andthing is simpler than this? In fact, two pieces of glass lenses can produce a lot of differences, when you use the sunglasses, these differences will also have great impact on you. In this article you will understand the various sunglasses exists between difference. A good sunglasses must have the following four functions:
To prevent the illuminate of ultraviolet ray in sunshine
Ultraviolet ray can damage the cornea and retina, high quality sunglasses can completely eliminate ultraviolet irradiation.
To prevent the illuminate of strong light
When the eyes to receive too much light, it will naturally to shrink the iris. Once the iris shrink to the limit state, then people will need to narrow eyes. If light still too, such as the snow reflected sunlight, will produce damage to the retina. High quality sunglasses can filter to up to 97% of the light in order to avoid damage it.
To prevent the illuminate of glare
Some surface, such as the surface of the water, can reflex a lot of light, and thus produced window would disrupt the sight or hidden objects. The high quality of polarized sunglasses can use technology to completely eliminate such glare.
Eliminate the light of certain frequencies
Some of the frequency of light will fuzzy line of sight, and some other frequency light can enhance contrast. For sunglasses choosing the right color, make it in specific environment better effect.
If sunglasses does not provide ultraviolet protection, it will you more exposure to uv rays. Cheap sunglasses filter to a part of the light, causing your iris open to receive to more light. It would also make more into the ultraviolet ray, and increases the damage caused by ultraviolet radiation to the retina.
Therefore, between various sunglasses really are different. The use of specific environment, choose the right, the high quality sunglasses will provide you with the most protection
Object Classification:
According to using classification,sunglasses can generally be divided into the shading glasses, light color sunglasses and special purpose sunglasses three categories.
The so-called sunshade lens, just as its name implies is to make the use of shading, people in the sunshine will adjust the flux depend on the size of the pupil , when light intensity is strongger than the human eye adjust ability, will cause damage to the human eye. So in the outdoor activity places, especially in the summer, many people are using the shading galsses to keep out sunshine, in order to reduce eyes fatigue caused by adjusing and the stimulation damage cause from the strong light.
Light color sunglasses to block sunshine role is not good as the shading glasses, but for its rich colors,it's suitable for all kinds of dress collocation with use, have very strong adornment effect. Light color sunglasses because of its rich colors, style diversity, gets the young gens 's favor,moreover the fashionable women loves it very much. Special using sunglasses has the very strong fucntion to keep out the sunlight.People often use it for the beach, skiing, climb, golf such as the place has strong sunlight.
Different people, according to the different preferences and different use to select the sunglasses, but the most fundamental is to want from the wearer can guarantee the safety and eyesight not damage on the basic principle. Reduce the glare stimulation, inspect content clearly not deformation, prevent ultraviolet, to the color recognition not distortion, accurate identification traffic signals, should be the basic function of sunglasses. If the function with a defect, light lost the role of sunglasses, heavy then can produce the dizzy, eyes acid bilges, etc to consciously symptoms, and sometimes also can produce slow to respond to contend, inspect content and walking on color illusion inequality symptoms and cause accidents, etc. So choose sunglasses can't focus on design and ignore its inner quality.
Knowlege of Using
Improper wearing sunglasses to get the eye disease, cloudy, indoor light and dark cases it is not necessary to wear sunglasses. Some people not to divide the situation, no matter the light from the sun, strong or weak, even in the twilight, in the evening and watching movies, TV also is wearing sunglasses, this will increase the burden of adjustment eyes, cause eye flesh tension and fatigue, make ision loss, inspect content fuzzy, serious will have lightheaded and other symptoms. For the visual system development still is not perfected baby, children should not be wearing sunglasses. In addition to the glass sunglasses, other sunglasses lens material wear resistance is not high, users often should pay attention to the surface of the sunglasses, when wear influence definition, should change in time.
Maintenance of Sunglasses
Dazzle beautiful sun glasses let you active in the sunshine, good free. In fact the sun glasses can block the sun, can stop pollution damage, so should be care, lest face is not hanged so well.
Maintain the sun glasses measures such as maintenance glasses, cleaning, accept fold, storage will form a habit. But the sun glasses often take off to take off the DaiDai, carelessly will scratch, so has a few little detail to special remind you: the sun glasses with a spot on adhesion, don't use a nail to dig, it would be easy to scratch the surface of the wound.
The sun glasses don't wear, many people will be conveniently hang on her head, and brought or pocket, this time the body movement range don't too big, lest the break or damaged. Or someone will put in the handbag, suggest you or in the first hard eyeglasses box, and then into the bag, so as not to be key, comb, such as copper little wear glasses, or to such as lipstick with cosmetic.
Motorists by wearing sunglasses, don't wear often without extra trouble on the dashboard or seat, and this is a very bad habit, the hot weather will the sun glasses roasted a prototype, especially plastic frame is even more so, had better be to take off, or collections in the glasses placed in the box.
Whether you will the sunglasses museum in where, be sure to remember to the mirror.
The method of Choosing Sunglasses
To match the face, skin color, working environment, dress
When wearing sunglasses don't feel dizzy and see objects more clearly
Effectively prevent ultraviolet ray, equipped with uv380, uv400 and similar orientation marks
Good sunglasses are supporting the glasses box, lens cloth, tags, etc.
What kind of people is not fit for wearing sunglasses
glaucoma patients.
When wearing sunglasses, into the eye of visible light reduce, pupil will open nature. This kind of change of the pupil to have no effect on healthy people, but for glaucoma for, but more increased aqueous cycle in the eye of the barrier, and likely to cause acute attack glaucoma, appear envy, eye pain, headache, nausea, vomiting, vision fell sharply and other symptoms. So, glaucoma or glaucoma suspects, who don't wear sunglasses.
color blindness patients.
All the achromatopsia person to wear sunglasses not too big effect. But some of the color blindness patients due to the lack of a few kinds of color only recognize ability, when wear sunglasses after can't distinguish color more.
night blindness patients.
Night blindness is due to lack of vitamin A, resulting in dim light, the visual can be affected. So sunglasses will influence the night blindness patients visual.
optic nerve retinal infection patients.
Wear sunglasses will aggravate the optic nerve retinal inflammation of the patients the optic nerve conduction obstacle, affect the recovery of illness.
children.
Children under the age of six visual function didn't mature to normal levels. New horizon ophthalmic hospital hospital said that if long time put the sun glasses, it will affect children's visual development. May even lead to amblyopia.
what's the reason of wearing the sunglasses will feel dizzy
If sunglasses brought up a felt faint, may be the mirror baseboard is too tight, the nasal discomfort "from the site oppressive feeling, or the lens itself QiuMianDu, prism degree of make the wrong parameters. The colorful about lens phenomenon, in principle, has nothing to do with dizzy, but may cause visual effect is not good. Colorful reasons may be lens when the problem or injection process for liquid problem. Normal about our glasses are from China professional manufacturer of high-end glasses, and have a long history of the Taiwan manufacturer. Should control is good, but sometimes has to avoid unhealthy phenomenon. After all is manual work. How much more than 8 bending is also a degree of sunglasses, also can cause dizziness. Added: "most of the Angle adjustable, dizzy also is most likely not qualified sunglasses, should stop to wear.
CGG News:2012 Summer Top Selling Cool Feeling Money / Phone Bag for Female Free Shipping
CGG is releasing a top selling? Money / Phone Bag with cool feeling touch for Female for 2012 summer,which is a best choice for girls who loves going window-shopping in the hot summer days,since this is a special bag be made of colorful metal beads wrapped the whole bag outside.
You can feel very cool when you hold it in you hand in the hot summer days when you are going window-shopping.which is used to put some broken money and your mobile phone.Kill three birds with one stone,it's a absolute best choice for your window-shopping in hot summer,don't you think so?
Kindly please note that there are two sizes of these bags,a small one and a big one.This part we are talking about is the small one the second line on the picture.Which color is your interested bag,kindly please make a tick in the color selection,we will ship the goods for you within 24 business hours.
CGG News:2012 Summer Top Selling Fashion and Cute Key Bag for Male and Female Free Shipping
CGG is releasing a top selling fashion and cute key bag for 2012 summer,which is for both male and female who loves cute and fashinable design of their car key bag or home door key bag and so on.
This key bag is made of high quality and very soft material,touch the animal head design bag very comfortably just likely touch the cute animal's head .There is a small metal ring embed inside the bag which is used to hook the key in order to avoid keys drop out the bag.And the Hang rope of the key bag is convenient for you to hook it in your car or wall pothook.
Which one is your interested key bag,kindly please inform us with the corresponding NO on the photo,we will ship the goods for you within 24 business hours.
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