Apple introduced the first full-screen smartphone, the iPhone X, this year. To maximize screen-to-body ratio, it removed the traditional home button and replaced Touch ID with Face ID. More intriguingly, the front of the iPhone X features a shaped display, often referred to as "Liu Haiping" (a term used to describe the notch-like design).
This "notch" houses several key components: from left to right, there's an infrared lens, floodlight sensor, proximity sensor, ambient light sensor, speaker, microphone, a 7-megapixel camera, and a dot matrix projector. Among these, the infrared lens, floodlight sensor, and dot matrix projector are the most critical. They work together to enable the advanced facial recognition technology that powers Face ID.
When you unlock your iPhone X using Face ID, the process begins with the dot matrix projector, which emits a pattern of over 30,000 invisible dots onto your face. The infrared camera then captures this data and compares it to the stored facial model. If the match is confirmed, the device unlocks or authorizes a payment.
Since its release, Face ID has sparked debate regarding its security and reliability. From a security standpoint, the system creates a unique 3D map of your face, making it extremely difficult for even identical twins to bypass. Compared to standard facial recognition systems that rely on 2D images, Face ID is significantly more secure and reliable.
While facial recognition offers convenience in many situations, it isn’t always as practical as fingerprint scanning—especially when you're lying in bed. However, this doesn’t mean you can’t use Face ID while in bed. The trick lies in how you set up your facial information. Here are two effective tips:
1. When setting up Face ID, the system asks you to record your face twice. During the first recording, you don't need to move your head. Simply bring the phone close to your face so it captures your eyes and nose, then slowly pull it away until your entire face is illuminated. Once the system confirms the first scan is complete, proceed to the second one. For the second scan, you must move your head in a full 360-degree rotation.
2. Combine this with proper lighting. For instance, if you're setting up Face ID at home, turn on the lights in the hallway and stand next to the light source—not directly under it, but beside it. This ensures your face is evenly lit. When you perform the first scan, your body should also rotate 360 degrees, creating a glowing effect around your face. This setup helps ensure Face ID works well even in backlit or low-light conditions.
By following these steps, you can unlock your iPhone X quickly and easily, whether you're close up, far away, in bright light, or even in bed. If you've struggled with Face ID not working properly, try this method and see the difference it makes.
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