Sony's 3D LCD TV Saves Energy, Warns Off Kids

Mar 11, 2010
Shinya Saeki, Nikkei Electronics
The "LX900" series is equipped with the "intelligent presence sensor" on the lower center of the display unit.
The "LX900" series is equipped with the "intelligent presence sensor" on the lower center of the display unit.
[Click to enlarge image]
The setting screen for the energy-saving function. An image from the camera is displayed on the lower right.
The setting screen for the energy-saving function. An image from the camera is displayed on the lower right.
[Click to enlarge image]
The TV gives a warning on the screen when a child is too close to it.
The TV gives a warning on the screen when a child is too close to it.
[Click to enlarge image]

Sony Corp announced eight models of its Bravia LCD TVs supporting 3D video.

Among those models, the "LX900" series, whose screen size ranges from 40 to 60 inches, is equipped with a camera called "intelligent presence sensor" on the lower center of the display unit. The camera can recognize human faces and estimate the location of the viewer, realizing the functions to save energy and to prevent children from coming too close to the TV.

The energy-saving function automatically turns off the screen by detecting not only faces but also their directions. The TV features the following three modes. (1) In the "energy saving-oriented mode," the screen is turned off when no face is recognized by the TV.

(2) In the "standard mode," when no face is recognized by the camera, the screen is darkened. And if the TV judges that no one is watching it, the screen is turned off. (3) In the "viewing-oriented mode," the screen is turned off after the TV judges that no one has been watching it for a preset time.

Sony equipped the Bravia Eco HDTV (announced in January 2009) and the Bravia EX700 (announced in January 2010) with an energy-saving technology using an infrared sensor.

"By using a camera (instead of the infrared sensor), it is possible to detect the conditions of viewers in more detail," Sony said.

Furthermore, the TV features a function to give a warning on the screen when a child approaches it. By determining the age of a person whose face is recognized, it judges whether the person is a child. When a child comes within about one meter from the screen, the TV shows the sentence "Please move away from the screen."

Because there is a margin of error in the estimation of age, it is possible that an adult is judged as a child, Sony said.

In accordance with the location of the viewer, audio and video are automatically adjusted.