Patent ID: 9131268
Filing Date: 2015-09-08
Classification: G06F,G09G,H04N

Abstract:
1. A display device among at least one or more display devices that are connected through an interface of digital multimedia and configured as a multi-display, the display device comprising: a first reception unit configured to receive a first DisplayPort signal from a first transmission unit of a previous display device by a first aux channel, decrypt the first DisplayPort signal, wherein the first DisplayPort signal is encrypted based on High-Bandwidth Digital Content Protection (HDCP) by the previous display device, divide the first DisplayPort signal into a digital video signal and a digital audio signal, and convert the digital video signal into a first Transistor-Transistor Logic (TTL) signal and a second Transistor-Transistor Logic (TTL) signal; a conversion unit configured to convert the first TTL signal into a high-quality image signal; a display unit configured to display the high-quality image signal; and a transmission unit configured to receive the second TTL signal, convert the second TTL signal and the digital audio signal into a second DisplayPort signal, encrypt the second DisplayPort signal based on HDCP, and transmit the encrypted second DisplayPort signal to a next display device by a second aux channel, wherein the second DisplayPort signal is received and decrypted by the next display device, wherein the first and second aux channel corrects a gain when the first DisplayPort signal is deteriorated, wherein the first TTL signal is displayed by being converted into the high-quality image signal at the display device, and wherein the second TTL signal is transmitted to the next display device by being converted into the second DisplayPort signal, to display a high-quality image signal at the next display device.