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Screen-door effects are more noticeable than LCD when up close, or on larger sizes. [54] New models are no longer produced. Colored sub-pixels may age at different rates, leading to a color shift, although some models will scan pixels to even out wear and prevent this shift. [55] Sensitive to UV light from direct sunlight.
An HDMI cable is composed of four shielded twisted pairs, with impedance of the order of 100 Ω (±15%), plus seven separate conductors. HDMI cables with Ethernet differ in that three of the separate conductors instead form an additional shielded twisted pair (with the CEC/DDC ground as a shield). [51]: §HEAC-2.9
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The 4K service could also only be used on "DirecTV 4K Ready" televisions, which support RVU protocol; this was limited to selected Samsung 4K televisions released in 2014. [115] In 2015, DirecTV introduced 4K Genie Mini set-top boxes, which can be connected to any HDMI 2.0/HDCP 2.2-compliant devices to provide 4K video. [116]
This chart shows the most common display resolutions, with the color of each resolution type indicating the display ratio (e.g., red indicates a 4:3 ratio).
Find the optimal distance for a given screen. Example: for a 4K UHD screen 140 cm high (112 inches diagonal), the optimal distance is 140 × 1.6 = 224 cm. Find the right screen size. Example: for a 1080 HDTV used at a distance of 250 cm, you need to find a screen whose height is close to 250 / 3.2 = 78 cm (63 inches diagonally).
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