Page 183 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

4 Privacy Concerns: Smart TVs may collect and transmit data about users’ viewing habits, preferences,
and behavior to manufacturers, advertisers, and third-party service providers, raising privacy concerns and
potential risks of data misuse or unauthorized access.
5 Reliability: Smart TVs rely on internet connectivity and software updates to function properly, which can lead
to reliability issues such as network outages, software glitches, and compatibility problems with apps and
services.
6 Limited Lifespan: Smart TVs may have a limited lifespan compared to traditional TVs due to rapid
advancements in technology, software obsolescence, and discontinued support for older models.
3D TV
Basic principal and working

1 Stereo Vision
• Human vision relies on the perception of depth through stereo vision, where each eye sees a slightly different
image due to their separation. This difference in perspective helps the brain gauge depth.

2 Creating Depth Perception
• 3D TV utilizes this principle by presenting two separate images, one for each eye, simulating the stereo vision
effect.

• These images are slightly offset to mimic the different perspectives seen by the left and right eyes in real life.
3 Display Technology
• Different technologies can be used to display these separate images. One common method is using specialized
glasses with active or passive shuttering systems.
• Active Shutter Glasses: These glasses rapidly alternate between blocking the left and right lens in
synchronization with the display, ensuring each eye sees the correct image.

• Passive Polarized Glasses: These glasses use different polarization for each lens. The TV screen alternately
displays images with different polarizations, ensuring each eye receives the correct image.
4 Content Production

• 3D content for TV typically involves shooting scenes with two cameras positioned at eye distance apart to
capture the left and right-eye views.
• Post-production processes may involve editing and aligning these views to ensure accurate depth perception.

5 Displaying 3D Content
• The 3D TV alternately displays frames for the left and right eyes in rapid succession, synchronized with the
glasses.

• When the viewer wears the appropriate glasses, each eye sees only the corresponding image, creating the
illusion of depth.
6 Depth Perception

• The brain combines the images received from each eye, taking advantage of the slight differences between
them to perceive depth in the image.
• This creates the illusion of objects appearing to have depth and dimensionality on the TV screen.

7 Compatibility and Formats
• 3D TV systems must be compatible with various formats of 3D content, such as side-by-side, top-bottom, or
frame sequential.

• The TV should also be able to convert 2D content into a simulated 3D effect, although this may not provide the
same depth perception as native 3D content.

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CITS : E & H - Electronics Mechanic - Lesson 100 - 107