Patent ID: 7171105

Claim:
An apparatus having at least one display screen forming a display zone and comprising an optical device including an optical guide one potion of which is at least partially superposed in relation to said display screen, said optical guide having two large faces and at least one lateral face, said portion of the optical guide including optical extraction means, said optical device further including al least one light source arranged in proximity to said lateral face and oriented in a predefined direction to emit light inside said optical guide and to cooperate with said extraction means in order to illuminate, at least partially, said display screen, wherein said optical guide further includes at least one first group of optical extractors arranged in one of said large faces and each having predefined geometrical features including at least one light extraction surface, said group of optical extractors extracting light outside said optical guide to form a figurative image in a similar direction to the direction along which said display screen is visible, said figurative image being defined directly as a function of said geometrical features, by the interaction of light on said extraction surfaces, wherein said optical extraction means are also optical extractors each having at least one light extracation surface and are arranged in a second group, and wherein said first and said second group of optical extractors are arranged in distinct areas of said optical guide.