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In some cases, a manufacturer sends all screens to sale then replaces the screen if the customer reports the unit as faulty and the defective pixels meet their minimum requirements for return. [1] Some screens come with a leaflet stating how many dead pixels they are allowed to have before the owner can send them back to the manufacturer.
Display Data Channel (DDC) is a collection of protocols for digital communication between a computer display and a graphics adapter that enable the display to communicate its supported display modes to the adapter and that enable the computer host to adjust monitor parameters, such as brightness and contrast.
The HDMI alternate mode lets a user connect the reversible USB-C connector with the HDMI source devices (mobile, tablet, laptop). This cable connects to video display/sink devices using any of the native HDMI connectors. This is an HDMI cable, in this case a USB-C to HDMI cable. [67]
Another criticism of active cables is that manufacturers may patent the electronics inside an active cable or even utilize on-chip cryptography to prevent competitors or consumers from producing their replacement cables, and therefore enable manufacturers to monopolize the market for cables and charge consumers higher prices.
In addition to digital video, HDMI supports the transport of packets used for digital audio. HDMI sources differentiate between legacy DVI displays and HDMI-capable displays by reading the display's EDID block. To promote interoperability between DVI-D and HDMI devices, HDMI source components and displays support DVI-D signaling.
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