3Dnäytöissä

3Dnäytöissä, also known as 3D displays, are electronic visual displays that can transmit visual information with depth perception, making it appear as if objects are coming out of or receding into the screen. This is achieved through various technologies that present slightly different images to each eye, mimicking the natural parallax effect that humans use for depth perception.

The most common methods for achieving 3D viewing on displays involve either active or passive 3D technologies. Active 3D systems typically use shutter glasses that rapidly alternate between blocking each eye's view, synchronized with the display showing a corresponding image for each eye. This creates the illusion of depth but requires battery-powered glasses and can sometimes lead to flicker or eye strain. Passive 3D systems, on the other hand, use polarized glasses. The display itself is designed to emit light polarized in different directions for each of the two images, and the glasses, which are lightweight and inexpensive, filter these images so each eye sees only the intended picture. This method is often used in cinemas and some consumer televisions.

Autostereoscopic 3D displays are another form of 3D technology that do not require any special eyewear. These displays use lenticular lenses or parallax barriers to direct specific images to each eye of the viewer. While convenient, autostereoscopic displays often have a limited viewing angle and can exhibit crosstalk, where parts of the image intended for one eye bleed into the view of the other, reducing the perceived depth.

The application of 3Dnäytöissä extends beyond home entertainment. They are used in medical imaging for enhanced visualization of scans, in professional design and engineering for reviewing complex models, and in gaming for a more immersive experience. Despite periods of significant interest, the widespread adoption of 3Dnäytöissä in consumer markets has faced challenges, including the cost of specialized content and the convenience of eyewear.