At Zhihu, whenever "hardware products for improving life" are mentioned, there will inevitably be "mechanical keyboard, SSD and iPhone". But it is a pity that there are not many answers from netizens to improve our "living condition". In fact, all kinds of eye injury equipment around us emerge in endlessly. From the fluorescent lights above our heads to the mobile phones on our hands, our eyes are exposed to the hazards of stroboscopic light sources.
Eye health science popularization
The stroboscopic light source, as its name implies, is the flicker of light source. Because of human's powerful "brain compensation" ability, visual residue, and the afterglow effect of light source, when the flicker frequency of light source is greater than 100Hz, the human eye can hardly feel the flicker phenomenon. Unfortunately, this low-frequency stroboscopic will still lead to eye fatigue, headache and other discomfort, and even dry eye and glaucoma in serious cases. Therefore, it is generally believed that the stroboscopic frequency must be above 200Hz before passing.
Strobe of fluorescent lamp can be captured by mobile camera without instrument
However, our most commonly used fluorescent lamp itself is an OLED screen with 100Hz strobe (flashing 100 times per second). Recently, the OLED screen has shown an overwhelming trend, especially in the strobe disaster area, and will flash at different frequencies according to the brightness of the mobile phone.
Here we have to mention the PWM dimming technology. In brief, it is a technology that deceives the naked eye by quickly alternating light and dark to control brightness. In 2011-2014, many desktop displays were dimming with PWM, but finally they changed back due to user pressure.
In order to improve the quality of OLED screens, high voltage+PWM dimming is used. The lower the screen brightness, the more serious the stroboscopic caused by PWM dimming (the duration of "off" becomes longer during the alternation of light and light). This is why some users on the Internet strongly oppose OLED screens and jokingly call it necessary to stock up more eyedrops in this era.
The stroboscopic light source is a troublesome problem for white-collar workers, programmers, designers, word workers, etc. who need to work under the fluorescent lamp. This is also an important reason why there are more and more desk lamp products in this era.
However, the traditional desk lamp/eye protecting desk lamp takes up too much space in both the office and home. Then the desk lamp enterprises have turned the desk lamp base into a charging base and a mobile phone rack. The BenQ WiT ScreenBar we experience today has creatively turned the desk lamp into a device mounted on the display.
Appearance and design
The packaging of BenQ WiT ScreenBar was unexpectedly large. After the drawer was opened, the instructions were made on the inner packaging, and the lamps, brackets and data lines had very detailed instructions for alignment.
In addition to the mirco USB noodle line with a length of about 1.5 meters, the core components are lamps and BenQ, a "gravity pivot clamp" that weighs nearly 1 jin. The latter allows BenQ WiT ScreenBar to adapt to displays of different thicknesses without a base (even laptops and televisions can be clipped on), without tape or tools.
The cylindrical gravity rudder at the rear end, with a concentric logo on the base, is responsible for balancing the weight of the lamp body. In the fixture, the parts in contact with the display and the lamp have soft glue materials to prevent scratching our beloved display.
BenQ WiT ScreenBar lamp body is made of aluminum alloy, with pure black anode sandblasting. The operating part is a whole piece of polished polycarbonate panel, with a very commercial and qualitative shape (as if I heard the sound of RMB hitting the ground). The back is a mirco USB interface that serves as the power interface. At both ends of the lamp body are the product logo and detailed certification information.
The light part consists of hundreds of cold and warm LED lamp beads and asymmetric reflector
user's experience
The biggest difference between BenQ WiT ScreenBar and normal desk lamp is that it has no base and does not occupy the desktop area. its There are only two installation steps: put the lamp body into the bracket, and the monitor on the bracket will be fixed.
One end of the gravity pivot clamp is responsible for clamping the lamp body, and the other end is responsible for clamping the display
From left to right on the lamp body are brightness, color temperature, automatic adjustment and switch, a total of 4 buttons. There is also a camera like light sensor between them, which is responsible for collecting ambient light data for the automatic adjustment function. The white circle beside each touch button is not only for decoration, but also for providing tactile feedback, so that the four touch buttons can be operated blindly.
No matter in the daytime or in dim light, the pure black anodized aluminum body of BenQ WiT ScreenBar is very low-key, and there is no sense of disobedience when clamped on the display.
Effect experience
The goal of intelligence should be that we do not need to operate. BenQ WiT ScreenBar does not have fancy functions such as APP remote control. The display on the rack can adapt to the ambient light when it is powered on. In addition to replacing the display, no user intervention is required until the end of its life cycle. If you feel that the default algorithm is different from your preferences, you can adjust the brightness and color temperature manually by long pressing. The machine is equipped with automatic memory and will return to the previous settings next time you start the machine.
In addition to the appearance and ease of use mentioned above, the evaluation point of the table lamp core is nothing more than the adjustment of "angle, brightness and color temperature".
angle
The traditional desk lamp has a very embarrassing problem: under normal circumstances, our eyes and monitors are on both sides of the lamp. The angle of the light should not be too slanted towards the human eye, otherwise it will be blind. But if you put the light across the other side, the screen will reflect light. Therefore, the desk lamp is usually placed on the side of the display, resulting in different luminosity on both sides of the display
Asymmetric light path, supporting 20 degree angle adjustment
In response to these two problems, BenQ WiT ScreenBar has evolved two of its most special features: first, its light is asymmetric, users cannot see beyond the lamp wick in the normal position, and the display side will not be "spilled" by light, which avoids the problem of reflection. Secondly, it is fixed and parallel to the plane of the display, so there is no problem of different luminosity between the left and the right. After using the BenQ WiT ScreenBar, I found that the reflection and blinking of the traditional desk lamp are quite a problem in the throat, and then you can't go back [slapping].
The adjustment angle of BenQ WiT ScreenBar is 10 degrees up and down, a total of 20 degrees. On a 21 inch monitor (about 35-40cm high), BenQ WiT ScreenBar can illuminate about 40cm of space in front. If it is mounted on the low screen of the notebook, it can only illuminate the keyboard area of the notebook. However, there is no technical solution to the problem of reflection of the mobile tablet on the desktop. You need a small bracket to support a certain angle to play the mobile tablet happily in front of the desktop.
brightness
Side view
Facing the perspective
BenQ WiT ScreenBar provides 15 levels of continuous dimming. Press and hold the brightness adjustment button every time, the machine will perform continuous brightness conversion from high to low, or low to high. Release at the appropriate position, and the machine can maintain a specific brightness. In fact, this setting is not very intuitive, but think about the situation of 15 gear adjustment with click. OK, it's better now.
In terms of hardware, BenQ WiT ScreenBar can provide 1000 Lux of central illumination at a height of 45cm. However, the height of a typical 21-24 inch display is only about 40cm, and the center illumination will certainly exceed 1000 Lux under the maximum brightness. When the automatic mode is not used, it is recommended to lower the brightness by several gears.
According to the national office lighting requirements of the United States, the 35cm * 74cm area of the desk must provide 500 Lux. But in fact, how can normal users have a photometer to control the brightness of their desktop? So BenQ WiT ScreenBar also acts as a photometer here. Its automatic adjustment mode will control the brightness according to the standard of 500 Lux. By default, it is about 500 Lux. It is unnecessary to do so.
Color temperature
BenQ WiT ScreenBar provides eight levels of color temperature from 2700K to 6500K, and the color rendering indexes of the two limiting sections are 82 and 87 respectively, corresponding to the luminous flux of 300lm and 320lm, which is OK. The 6500K end is a bit cold, while the 2700K is for the color temperature of ultra extreme ambient light. The color rendering span is very large, enough to meet the color temperature required by 99% of users. Of course, for most users, the color temperature control should be left to the machine itself. The optical sensors and algorithms that cost so much money are more in line with health standards than personal preferences.
summary
We are so familiar with the category of table lamp that before you contact BenQ WiT ScreenBar, you don't think there is any room for improvement. BenQ WiT ScreenBar, a smart screen hanging lamp, is the most intelligent and stupid smart product we have ever met. Like Honda, this product does not require user intervention, and it will never give you the opportunity to learn about cars or optics.
BenQ WiT ScreenBar not only has incomparable effect and experience with those desktop lamps on the market, but also its price is outstanding. It is now stable at 999 yuan, and occasionally some platforms will have a price of about 700 yuan. In the traditional sense, this is a very high price.
Table lamps, like air conditioners, purifiers and routers, are "survival maintenance equipment" responsible for regulating our living and working environment. Compared with the temperature, humidity and WiFi speed of the air, the desk lamps and devices that are responsible for our eyes should also receive our attention, especially for heavy users. They are even more important than the keyboard and router: the keyboard feel is not crisp enough, which affects the input rhythm at most; Internet speed is not good, at most it affects the mood; But the light is not good, which affects our eyes to observe the world.
If you agree that the mechanical keyboard can really improve the quality of life, BenQ WiT ScreenBar and its similar products should be on your shopping list.
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