Adjusting the brightness of your computer screen is very important for your eye health. If your computer screen is too bright, this can irritate your eyes and give you fatigue or headaches. If the computer screen is too dim, the text on the computer screen will not be clear, which will also cause visual fatigue. In addition, if you are using a laptop computer, the bright computer screen will also greatly consume power and shorten the life of the battery.
Normally, if you open the control panel of Windows 10, you can see the feature of changing brightness, and you can adjust the brightness of the display by dragging the change brightness slider to the left and right. But Windows 10’s brightness adjustment feature does not always appear in the control panel.
CareUEyes can easily help you achieve intelligent brightness adjustment.
CareUEyes has eight preset modes, each preset with the most suitable brightness, you just need to check the suitable mode to change the screen brightness. If you are not satisfied with the brightness, you can change the brightness by clicking or dragging the brightness slider.
You can also customize the hotkeys to change the brightness more quickly.
Some software uses overlay translucent windows to adjust brightness, but CareUEyes directly controls the display’s RGB value, which ensures compatibility with other software.
In addition, CareUEyes also has blue light filtering features. It filters blue light by adjusting the color temperature, the lower the color temperature, the more blue light is filtered. You can adjust the color temperature by dragging the color temperature slider.
CareUEyes is a professional eye protection software, which can adjust the screen brightness, filter blue light, and remind you to take breaks regularly. With CareUEyes you can protect your eyes in a comprehensive way.
In today’s society, computers have become an indispensable part of our life, work, and study. When you use the computer at night, do you feel eye fatigue, headache, and trouble falling asleep?
A screen dimmer for night is necessary
Why do computer screens are harmful to our health, especially at night? One important reason is computer screens emit blue light. The brighter the screen, the more blue light is emitted. Blue light can cause eye fatigue and cause sleep troubles. Research had shown that too much exposure to blue light at night can suppress melatonin production, disrupting our normal body clock and making our brains think it’s still daytime. A screen dimmer for night is very necessary for all people who use computers at night.
What is the feature of the screen dimmer for night
The screen dimmer for night is a kind of software that can adjust screen brightness and filter blue light. It can help you avoid the damage of bright light to your eyes at night, and avoid the blue light at night from disturbing your normal sleep cycle.
CareUEyes is an excellent screen dimmer app
CareUEyes is a professional eye protection software, it has the feature of dimming the screen brightness, supports Windows 10/Windows 7/Windows XP.
CareUEyes can dim all screens, whether you are a desktop monitor or a laptop monitor, or a monitor external to the laptop, or your computer is connected to multiple monitors. It is easy to adjust brightness with CareUEyes, you can adjust screen brightness from 20% to 100%.
The first way, you can drag or click the brightness slider to adjust screen brightness;
The second way, you can adjust brightness in the tray right-click menu;
The third way, you can customize hotkeys, and then use the keyboards to adjust brightness.
Automatically dim screen brightness at night
You can set different screen brightness for day and night, CareUEyes will automatically dim screen brightness at night, you only need to set the sunset time.
Reduce blue light and help you sleep
CareUEyes reduces blue light by adjusting the color temperature and enhancing reddish colors, so the computer screen will look warmer.
You can adjust the color temperature with the color temperature slider, sliding to the left to decrease the color temperature can reduce blue light, and sliding to the right to increase the color temperature can increase blue light.
You can also customize hotkeys to quickly adjust color temperature.
CareUEeys has more features that can protect your eyes
Editing mode changes your white screen to black, making it easier on the eyes at night. This feature is very suitable for you to edit or read the text at night because the black background can eliminate most of the blue light and relax your eyes.
Studies have shown that computer screens emit blue light that is harmful to health. Users who must work long hours on computer screens experience eye strain and headaches. People who are overexposed to blue light at night time also experience circadian rhythm disruptions and difficulty sleeping.
Next, I will show you how to enable blue light filtering in Windows 10. Includes the night light feature that is incorporated in Windows 10 and a more perfect alternative: CareUEyes.
Windows 10 night light: Blue light filter for Windows 10
A feature called night light has been incorporated in the newer Windows 10 release, designed to reduce the blue light emitted from the screen, reduce eye strain, and maintain normal sleep patterns. Night light mode reduces blue light by adjusting the color temperature to reduce blue light and enhance redder colors, and the screen becomes warmer.
Redder and warmer lights are less harmful to the eyes, and people who use night Light mode tend to have more regular sleep cycles than those who do not use the feature. You can adjust the night light to your liking, and you can schedule it to turn on and turn off at certain times.
How to enable the night light feature
To enable the blue light filter in Windows 10, you need to perform the following steps: 1. From the Start menu, click on the Settings button.
2. When Windows Settings appears on the screen, click on the System option.
3. Click on the “Display” option.
4. Click on the night light settings.
5. Toggle the night light switch to On.
6. By sliding, you can adjust the color temperature as per your requirement.
Schedule night light
7. If you want to schedule the night light to turn on and off automatically at specific times, toggle the Schedule night light switch to On and click on the Set hours button.
8. Modify the night light turn on and turn off time as per your requirement.
9. If you need to turn on and off the night light automatically according to the local sunset and sunrise time, toggle the Schedule night light switch to On and click on the Sunset to sunrise button.
10. If you do not have access to the location of this device, you need to click on Location settings first.
11. Click on the Change button.
12. Turn on the location access permission.
Disadvantages of the night light mode
1. The first disadvantage of Windows 10 night light mode is that it changes color accuracy. If you are using the night light feature for the first time, your eyes may not get used to it, but after a while, your eyes will slowly get used to it. However, when you are editing videos or photos with Windows, you may need to turn off the night light to maintain a high level of color accuracy. But it is a bit of a hassle to manually turn on and off the night light frequently.
2. The second disadvantage of Windows 10 nightlight mode is that you can only set one color temperature mode. But people may need different color temperatures in different scenarios, for example, people can accept lower color temperature when dealing with emails or reading web pages, but usually don’t want the color of the screen to be affected too much when playing games or watching movies, so it will be easier to use if nightlight can set multiple color temperature modes.
3. The third disadvantage of Windows 10 nightlight mode is that it does not support hotkeys to adjust color temperature. According to the usual steps, you need to go through six steps to open the color temperature adjustment.
4. The fourth disadvantage of Windows 10 night light mode is that it can not set different color temperatures for day and night, you need to manually adjust the color temperature again at sunset and sunrise.
For people who just want to improve their sleep, they can turn on the night light only after sunset, but for people who want to reduce blue light to protect their eyes, they also need to turn on the night light feature during the day, but usually, they don’t need to filter as much blue light during the day as they do at night, so it’s necessary to set different color temperature for day and night.
A more perfect third-party alternative
If you want to overcome the above disadvantages of Windows 10 night light, you can install a third-party software called CareUEyes. CareUEyes filters blue light by adjusting the color temperature just like Windows 10 night light, but it not only supports Windows 10 but also supports installation on XP, Windows 7, and Windows 8.
CareUEyes is easier to use than the night light feature
1. Eight built-in color temperature modes for you to choose
CareUEyes has eight modes for you to choose from, you just need to experience each mode one by one when you use it for the first time, and you can find the most suitable model for you.
2. Convenient and quick to adjust the color temperature
If you are not satisfied with the default mode, you can either adjust the color temperature through the slider on the main interface of CareUEyes or customize the hotkeys to adjust the color temperature.
3. You can set different color temperatures for day and night
You just need to turn on the sunrise and sunset features of CareUEyes to set different color temperatures for day and night, and CareUEyes will automatically adjust the color temperature for you at the sunrise and sunset time you set.
4. Powerful customization rules
You can customize the rules to enter the specified mode when using an application, for example, you can specify to pause the color temperature adjustment when using Photoshop, i.e. enter Pause mode, and enter the game mode when running the game CS: GO.
5. More eye protection features
CareUEyes is not just a blue light filter, it can also adjust the screen brightness, focus, and remind to take regular breaks, it is a multi-feature eye protection software.
The Windows 10 night Light is a primary blue light filter, if you need a more powerful and easy-to-use blue light filter with more comprehensive protection for your eyes, recommend you to install CareUEyes.
The basic rule of computer screen brightness is: the screen brightness is best adjusted to be similar to the brightness of the surrounding environment, not too bright or too dim. If the screen brightness is not suitable, it will cause eye fatigue and vision problems. However, the surrounding lighting conditions are constantly changing, and we need to adjust the screen brightness frequently.
On the Internet, there are many tutorials on the brightness adjustment of windows 7.
But they can’t help you solve the problem, because the brightness adjustment feature of windows 7 is not always displayed in the control panel, and sometimes even if we update the display driver, the brightness cannot be adjusted.
This is really annoying, but by using the third-party application CareUEyes, you can easily adjust the brightness on windows 7.
Adjust Screen Brightness On Windows 7 in a simple way
CareUEyes is an eye protection software that can easily help you adjust the brightness on windows 7. You can use the slider to adjust the brightness in the CareUEyes interface, and CareUEyes also supports setting custom settings hotkeys to adjust the brightness.
Drag the slider to the left to reduce screen brightness, drag the slider to the right to increase screen brightness.
You can customize hotkeys on CareUEyes’ Options page, and then you can use the keyboard to increase or decrease brightness.
CareUEyes has eight preset modes, each of which can set different brightness for day and night. CareUEyes will help you switch the brightness according to the preset sunrise and sunset time. You can directly select the preferred mode or modify the preset brightness by the slider.
If the brightness of Windows 7 cannot be adjusted, not only will it hurt your eyes, but it will also affect your sleep.
Light is one of the most important external factors that can affect sleep. It does so both directly, by making it difficult for people to fall asleep, and indirectly, by influencing the timing of our internal clock and thereby affecting our preferred time to sleep..(External Factors that Influence Sleep)
On most laptop keyboards, you will find shortcut keys that can quickly increase and decrease brightness. Usually, these keys are function keys (from F1 to F12) and are usually located at the top of the keyboard. If you want to adjust the screen brightness, look for the brightness symbol (usually a logo).
Since the F keys are function keys, you must hold down the Fn key on the keyboard (usually located near the lower-left corner of the keyboard) when you press them to work.
Adjusting screen brightness to be suitable is very important for the eyes. The screen dimmer helps adjust screen brightness, reduce eye strain, prevent eye diseases, and improve sleep.
Three ways to reduce screen brightness
Use the brightness adjustment button of the monitor, display, or screen
Use the built-in brightness adjustment of windows (System->Display)
Use the laptop keyboard shortcut Fn+F11 or Fn+ F12
😒But the above three methods to reduce screen brightness are cumbersome and usually useless. People have to look for other solutions.
Third-party screen brightness app
First, CareUEyes may be the best screen brightness app(Supports Windows 10, Windows 7, and Windows XP ). It supports multiple screens and can dim all your screens, E.g. laptop, a desktop PC with an external display, or even connecting an external display to a laptop.
CareUEyes is neat software, which has a simple user interface and practical features.
At night or when we are in a dark environment, even if the brightness of the monitor has been adjusted to the lowest level, it is still too bright and too dazzling.
Use CareUEyes to dim the screen easily (screen darkener), just click the built-in working mode or drag the brightness slider.
You can easily reduce the brightness of the display below the factory setting, this feature is very useful and can greatly reduce eye fatigue.
It supports multiple displays, you can control the brightness of each display individually, or you can dim them at the same time.
If you like the screen to be brighter during the day and darker at night, you can turn on the sunset/sunrise mode, it will automatically adjust the brightness of the display according to the sunrise/sunset time.
Support hotkeys to adjust screen brightness
CareUEyes supports hotkeys to quickly adjust screen brightness, you only need to customize the hotkeys in the settings, you can use the hotkeys to brighten or dim the screen.
More eye protection solutions for CareUEyes
In addition to dimming the screen, there are more ways to protect our eyes, such as blue light filtering and regular breaks:
Blue light filter
The display is too bright will affect the eyesight, the blue light emitted by the display can also cause damage to the eyes.
Blue light has the characteristics of high energy and short wavelength.
Turning on the blue light filter feature can reduce the damage of blue light to the eyes
Take regular breaks
Working in front of a computer for a long time can easily cause eye fatigue, dry eyes, and other symptoms.
It’s more beneficial for us to take a few minutes to break every once in a while, exercise our body, and see the distant scenery.
Since 2017, millions of users have benefited from CareUEyes, because it is not only a screen dimmer but also an eye protection assistant. It can always protect your health.
I am also a beneficiary of it😊. Because sometimes my work has to be done at night.
A monitor that is too bright can make my eyes sting and make it difficult to fall asleep at night. I can have a good sleep after using it.
Every feature update of CareUEyes will bring users a better experience and more interesting features. You can check its changes log here.
Because many users rely on it, we are more motivated to improve it. You can check their reviews here.
The Advanced Color API is a term used by Windows developers. It uses GPU rendering and supports high dynamic range (HDR), wide color gamut (WCG), and high-precision (bit depth) visual content such as videos, games, and photos. Compared with the Color API, the Advanced Color API has better compatibility and performance.
CaeUEyes calls the Color API by default when adjusting the color temperature and brightness, but the Color API cannot work on some devices and must enable the Advanced Color API. Since it is impossible to accurately identify which devices need to enable the Advanced Color API, there may be a problem that CareUEyes does not work properly on some users’ computers because the Advanced color API features are not enabled.
In order to solve this problem, after the user newly installs CareUEyes, a pop-up will ask the user whether CareUEyes is working properly. If CareUEyes is not working properly, the Advanced Color API will be enabled.
However, there is a shortcoming when the Advanced Color API is enabled. It will cause the color of the picture to turn yellow when taking a screenshot, such as a screenshot below.
Therefore, it is recommended that for users who have enabled the advanced color API, it is best to set a hotkey to quickly disable and enable CareUEyes. You can use the hotkey to disable CareUEyes before taking the screenshot, and then use the hotkey to enable CareUEyes after the screenshot is completed, so that the color of the screenshot will not be distorted.
A little advantage over your enemies may be all you need to win the game. Cranking up your digital vibration will improve contrast and make it easier to spot enemies in the darker parts of the map.
What is the digital vibrance
Using Digital Vibrance (NVIDIA) or Saturation (AMD) in your graphic card driver can add an additional blast to your gaming experience due to more colourful images being output to your monitor. Digital Vibrance/Saturation might give you an advantage in games like Counter-Strike: Global Offensive, as it will ease spotting enemies in the game.
VibranceGUI is an application that automates NVIDIAs Digital Vibrance Control (“DVC”) by utilizing the NVIDIA Driver API. AMD support for automating Saturation has been added.
Using Digital Vibrance (NVIDIA) or Saturation (AMD) in your graphic card driver can add an additional blast to your gaming experience due to more colorful images being output to your monitor. It might even give you a slight edge when playing competitively in games like CS:GO.
The use of these settings comes with a huge downside though. Whenever switching out of a game back to Windows, the colors are still vibrant and don’t fit in the appearance of Windows. This happens because both settings will be applied system-wide. Luckily for you, this is where vibranceGUI comes into play.
Digital Vibrance/Saturation might give you an advantage in games like Counter-Strike: Global Offensive, as it will ease spotting enemies in the game. Many professional players use Digital Vibrance/Saturation nowadays. Some examples: GeT_RiGhT, f0rest, friberg, ScreaM. However, changing the setting manually in NVIDIAs or AMDs Control Panel after quitting CS:GO is annoying and that’s why I decided to create this tool
VibranceGUI is a small piece of software that allows us to set different levels of Vibrance for our games without messing with the Vibrance of Windows. It also sets the digital vibrance only for the programs we want (only games, not our desktop or browser) and we can set it to run onnce we boot our computer. To set up VibranceGUI for CSGO we have to open the program and click on the Add manually button. Then we just have to navigate to our Steam folder and find the csgo.exe file and select it.
Using VibranceGUI VibranceGUI is a small piece of software that allows us to set different levels of Vibrance for our games without messing with the Vibrance of Windows. It also sets the digital vibrance only for the programs we want (only games, not our desktop or browser) and we can set it to run onnce we boot our computer. To set up VibranceGUI for CSGO we have to open the program and click on the Add manually button. Then we just have to navigate to our Steam folder and find the csgo.exe file and select it.
Once we’ve done this, make sure VibranceGUI is running and open CSGO. You will immediately notice a difference in the colours of the game.
Computers have penetrated into every aspect of our lives. Whether in the workplace, at home, or at school, the use of computers is now almost mandatory, and to a certain extent, for many of us, watching the screen is almost inevitable.
Now apparent that prolonged use can lead to a series of computer vision-related problems, collectively known as computer vision syndrome (CVS) or digital eye fatigue, in fact, just a day spent on the computer for more than two hours, you will have 90% the chance of developing computer vision syndrome (CVS), most of us have experienced at least some of the symptoms of CVS. These symptoms include eyestrain, headaches, dry eyes, blurred vision, neck pain, computer vision syndrome is due to prolonged staring at the screen (computer, iPad, mobile phone, etc.) occur, these are some of the more common symptoms.
In addition to causing CVS, the computer is a notorious blue light emitter, Blu-ray also involves many other health problems. The excessive blue light on the screen can cause eye damage and may play a role in the development of age-related macular degeneration (AMD). It also suppresses sleep and can cause insomnia and disturb your circadian rhythm. If we use a mobile phone or computer before going to bed, it is more likely to cause insomnia.
Therefore, protecting your eyes is vital whenever you use a computer, and you can take some steps to prevent the symptoms from getting too bad. There are 6 ways to protect your eyes from the screen, even if you have to stare at them all day long.
1. Anti glare computer screen protector for eyes
The glare of reflection on the computer screen is the main cause of eye strain, and the reflection on the computer screen will constantly distract your attention, forcing you to make extra efforts to concentrate. This ultimately leads to eye strain, and you can use a high-end anti-glare computer screen to reduce the glare of your computer monitor. The anti-glare filter is available in two frame designs – flat or wrap. The frame you choose depends on your display style and personal preference, and with either of them, you can virtually eliminate all UV rays that are reflected from the screen to your eyes. There is another option – install eye protection software CareUEyes, which filters the glare of the display, is very convenient to use, and is cheaper than the anti-glare screen protector.
2. Blue light filter computer screen protector for eyes
The screen protector can also be used to filter out the blue light emitted by the computer, which has a shorter wavelength than the other components of the visible spectrum and contains more energy. Excessive blue light can cause eye damage and can cause insomnia and disturb your circadian rhythm. You can filter blue light by installing a Blu-ray filter screen protector for your computer, but the Blu-ray filter screen can cause the display to be distorted, you may need time Adapting to this change, too much color distortion can exacerbate eye fatigue, and the eye care software CareUEyes can also filter blue light, CareUEyes is more powerful than the blue light filter screen and is more convenient to use.
3. Follow the “20-20-20” rule
20-20-20 rule: Every 20 minutes, look at something 20 feet away for 20 seconds. The 20/20/20 rule was popularized by Dr. Jeff Anshell, a specialist in “vision ergonomics.”, sometimes we forget With this rule, we can install the eye care software CareUEyes , which will remind us to rest every 20 minutes.
4. Adjust screen settings
Downgrade the screen brightness, you want the brightness of the display to match the brightness of the surrounding work area, and if it looks like the light source in the room, it’s too bright. If it looks dull, it may be too dark, and the eye care software CareUEyes can easily adjust the brightness to the appropriate value.
5. Don’t forget to blink
Blinking helps to lubricate the eyes, otherwise, it can cause dry eyes. When you stare at the screen for a long time, you will forget the blink of an eye, so we must consciously force ourselves to blink, which is helpful for the health of the eyes. Combined with the 20-20-20 rule.
6. Regular breaks
When we are busy, we will forget to go to the bathroom, forget to drink water, forget to blink, forget to rest, but for the health of our eyes, we must rest regularly. If you can’t do this, then you have to use software to force yourself to rest. CareUEyes has a forced rest feature that reminds you to rest every 20 minutes.
CareUEyes is an eye protection software that runs on windows. It has anti glare, blue light filtering, and timed reminder features. It is very convenient to use and is used by many companies and governments.
Conclusion to computer screen protectors for eyes
We can reduce eye fatigue through physical devices, or relieve eye fatigue through habitual changes, but the most convenient way is to use eye care software CareUEyes , because it is more convenient, cheaper, and more effective, hope our article is helpful for you.
For people who work long hours in front of a computer, the eyes need more protection than the shoulders、 neck、back、waist and arms, because the eyes are an important part of our access to external information.
It is very important to change the screen brightness to a suitable level. If your screen brightness is too high, you may experience eye fatigue or headaches. Adjusting the screen brightness can improve eye health and comfort.
But for Windows systems like Windows XP、Windows 7, change brightness is usually a troublesome thing because it often requires more complex operations to darken the display brightness. Fortunately, Windows 10 has introduced a new brightness change feature. This makes it easier for us to change brightness.
1. Change the brightness using the settings UI
Go to ‘Settings’ and then select ‘System’. Now under ‘Display’, you will find ‘Change brightness’ slider on the top. Move that slider to adjust the brightness of your device. (the slider bar may not be displayed for windows 10 with a lower version number).
2. Change the brightness on Windows 10 using the quick actions
There is a square bubble-shaped icon on the far right side of the windows taskbar. After clicking this icon, a menu will pop up. You can also press the Windows key + A to open the menu. There will be a sun-shaped brightness icon in the menu, which is used to adjust the brightness. If you click it, it will switch between the predetermined brightness settings: 0%, 25%, 50%, 75%, and 100%.
3. Change the screen brightness using hotkeys
If you are using a laptop, you can adjust the screen brightness in the following ways.
most laptop keyboards have shortcut keys that can quickly adjust brightness. It is usually a function key marked with the sun logo, located at the top of the keyboard,
On most laptop keyboards, you will find shortcut keys that can quickly increase and decrease brightness. Usually, these keys are function keys (from F1 to F12) and are usually located at the top of the keyboard. If you want to adjust the screen brightness, look for the brightness symbol (usually a logo).
4. Change the screen brightness using the display’s physical buttons
Some monitors have dedicated buttons to adjust the brightness, while some monitors have to check their specific menu to find the brightness control.
5. Change the screen brightness by changing the Power mode
Reducing the screen brightness can reduce energy consumption and increase the autonomy of the device. For laptops and tablets, Windows 10 has a setting that can change the brightness of the display according to the power mode you use. To enable this option, first, click or tap the power icon in the system tray on the right side of the taskbar, and then access the battery settings.
In the Battery settings window, scroll down to the Battery saver section. Check the box at the bottom, next to the “Lower screen brightness while in battery saver” option.
6. Use third-party software CareUEyes to adjust the brightness
You can click or drag the brightness slider to change the brightness, to the left to decrease the brightness, to the right to increase the brightness. You can also customize the hotkeys to adjust the brightness
Do you think that the adjusted brightness feature of windows 10 is perfect enough?
No, the blue light emitted by the monitor and the long-term use of the computer will cause digital eye fatigue, age-related macular degeneration, and Circadian rhythm disorder.
CareUEyes can help you solve these problems. In addition to brightness adjustment, it also has a Blue light filter feature. It can turn the color temperature of the monitor into a warm color and reduce the damage caused by blue light to the eyes (such as IPhone’s night shift feature).
The yellow screen can effectively reduce the blue light emitted by the screen, relieve eye fatigue, and even help you fall asleep better at night.
If you haven’t heard the dangers of blue light, you may not like a yellow screen.
What is Blue light?
Blue light is light with relatively high energy with a wavelength between 400nm and 480nm. It has a shorter wavelength and is part of the visible spectrum.
Why is blue light bad?
Blue light can penetrate the lens directly to our retina, causing the atrophy or even death of retinal pigment epithelial cells. The death of light-sensitive cells will result in decreased vision or even complete loss of vision. This damage is irreversible.
Blue light can also cause age-related macular degeneration, which can lead to permanent vision loss.
The lens of the human eye will absorb part of the blue light and gradually become cloudy to form cataracts, and most of the blue light will penetrate the lens, especially children’s lenses are clearer and cannot effectively resist the blue light, which is more likely to cause macular degeneration and cataracts.
Due to the short wavelength of blue light, the focus point does not fall on the center of the retina, but a little bit forward from the retina. To see clearly, the eyeballs will be in a state of tension for a long time, causing visual fatigue. You may experience symptoms such as eye fatigue, headache, blurred vision, dry eyes, neck and shoulder pain.
Blue light inhibits the production of melatonin in the body. Melatonin is a hormone produced by the pineal gland, which helps your body know when to sleep and wake up. Usually, at night, your body produces more melatonin. Once the sun starts to go down, the level of melatonin secretion starts to rise. This indicates that the body is ready to fall asleep. When the sun rises, the level of melatonin secretion starts to decrease and the body gradually began to wake up. Excessive exposure to blue light at night and insufficient melatonin secretion in the human body will keep people awake and unable to fall asleep, which causes the problem of insomnia.
Why can the yellow screen reduce the blue light emitted by the screen?
You need to know the concept of color temperature first. The concept of color temperature is based on an imaginary absolute black body, which emits different colors of light when heated to different temperatures, and its objects appear in different colors. Just like when an iron block is heated, the iron block first turns red, then yellow, and finally white. When heated to a certain temperature, the spectral component of the light emitted by the black body is called the color temperature at this temperature, and the unit of measurement is “K” (Kelvin).
If the light emitted by a light source has the same spectral components as the light emitted by a black body at a certain temperature, it is called a certain K color temperature.
For example, some common light sources and related parameters of color temperature: tungsten lamp 2700K; summer noon sun 5500K; cloudy 6500-7500K; candlelight 2000K and so on.
The color temperature calibrated by this method is exactly the opposite of what the general public thinks of “warm” and “cold”. For example, people usually feel red. Orange and yellow are warmer, white and blue are colder, but in fact, red has the lowest color temperature, and then gradually increases are orange, yellow, white, and blue, and blue is the highest color temperature.
The color temperature of the screen only indicates the spectral components of the light source, not the luminous intensity (the brightness of the screen indicates the luminous intensity of the screen). A high color temperature indicates more short-wave components and a bluish-green color; a low color temperature indicates more long-wave components and a reddish-yellow color.
Therefore, if we want to reduce the total amount of blue light emitted by the screen, one way is to reduce the blue light component in the spectrum, that is, lower the color temperature and adjust the screen to a yellowish tint. Another method is to reduce the luminous intensity of the screen, that is, to dim the brightness of the screen.
Are the color temperature and brightness as low as possible?
Although reducing the color temperature and brightness of the screen can help us reduce the harmful blue light, the color temperature and brightness of the screen are not as low as possible. Because the color temperature is too low, the screen will turn red, which will make the screen difficult to see. Too low screen brightness will also make the screen difficult to see, increasing eye fatigue. We need to keep the color temperature and brightness of the screen within an appropriate range.
What are the appropriate color temperature and brightness?
CareUEyes also has the function of adjusting the color temperature and adjusting the screen brightness. It has designed eight preset modes according to the most commonly used scenes in people’s daily life and configured the most appropriate color temperature and brightness for each mode, which are health, games, movies, office, editing, reading, customization, and pause modes. This allows you to quickly find the color temperature and brightness that suit you.
The healthy mode has the lowest color temperature among all modes, and the screen looks slightly yellow. Your eyes may not adapt well at first, but soon you will find that such a screen looks softer, your eyes will no longer be tingling, dry, and tired.
Although blue light is harmful to the eyes, proper blue light irradiation is beneficial to people during the day. Blue light can keep people awake and have the energy to finish work or study. Therefore, if you are not a person with extremely sensitive eyes, you only need to filter a small part of the blue light during the day and restore the light of the computer screen to light similar to daylight.
But at night, blue light becomes very harmful, you need to filter more blue light to prevent sleep from being disturbed by blue light.
According to people’s different needs for blue light day and night, CareUEyes provides sunrise and sunset functions. Compared with the sunrise and sunset, the color temperature and brightness after sunset are lower.
You only need to turn on the sunrise and sunset function, CareUEyes will automatically help you adjust the color temperature and brightness at sunrise and sunset.