It’s no secret that phones and computers are extremely intelligent. Under the exterior, there’s a lot of high-tech stuff going on to improve your experience. Auto-brightness is one of those things. What’s the deal with that?

Auto-brightness is a function on iPhones, iPads, and Android smartphones that you may be familiar with. It’s largely utilized in mobile devices, but it’s also beginning to show up in Windows laptops, MacBooks, and Chromebooks in recent years. Let’s see how this dazzling feature protects your eyes.

LCD or OLED displays are common in smartphones and laptops. They work in different ways, but the ultimate effect is light shining into your eyes through the display. Because the light might be harsh at times, these gadgets offer brightness adjustments.

If you’re in a shaded environment, you want the screen to be dim, and when you’re invisible sunlight, you want it to be vibrant. As a result, you may want to adjust the brightness to match the illumination in your environment. When you do this several times during the day, it becomes boring.

What if you didn’t have to worry about regularly adjusting the brightness? What if your gadget could detect ambient illumination and automatically alter the display brightness? That’s how the concept of auto-brightness was born.

How It Works

Well, that’s a nice concept, however, how does it function in practice? How can a phone or laptop tell how bright the environment is? Let’s talk regarding sensors for a moment.

There are dozens of sensors within your phone and computer. Motion sensors, a proximity sensor, an accelerometer, a gyroscope, a barometer, and an ambient light sensor are all included in smartphones. That last one is the key to auto-brightness

An ambient light sensor is a relatively basic device. It’s a form of photodetector with some clever sensors that can measure how much ambient light is available. It’s a type of camera if you will.

Consider snapping a picture and then combining all of the hues to produce the “average” color. Similarly, a light sensor measures ambient light. “lux” is the name of the measuring unit.

To put it another way, the sensor can identify when you’re outside in direct sunlight and when you’re in bed with the lights turned off. The brightness of the display is then adjusted accordingly. The ambient light sensor is hidden someplace in the device’s bezel on the front.

Adaptive Brightness

Auto-brightness has evolved in tandem with the advancement of electronics. “Adaptive Brightness” is a feature on Google Pixel devices that incorporates AI. Along with the light sensor, it understands the way you change the brightness on your own and does it for you.

Apple’s “True Tone” feature is available on some iPhones, iPads, and Macs, and it employs far more sensors to alter the brightness and color tone to reflect your environment. That’s really cool.

It’s a straightforward idea with sophisticated small sensors to make it work. Auto-brightness is something we accept as normal today, even though it wasn’t previously so common in gadgets with displays. This is an excellent illustration of how technology can make our life simpler.


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