Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In display technology parlance, viewing angle is the maximum angle at which a display can be viewed with acceptable visual performance. In a technical context, this angular range is called viewing cone defined by a multitude of viewing directions. The image may seem garbled, poorly saturated, of poor contrast, blurry or too faint outside the stated viewing angle range, the exact mode of "failure" being dependent on the display type in question. For example, some projection screens reflect more light perpendicular to the screen and less light to the sides, making the screen appear much darker (and sometimes colors distorted) if the viewer is not in front of the screen.

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