Patent ID: 8711237
Filing Date: 2014-04-29
Classification: H04N

Abstract:
1. A circuit device for preventing radiation emission in a portable terminal with two cameras, the device comprising: a first camera connected through a 3-state buffer to a shared line comprising at least one of a shared clock line and a shared data line; a second camera having a higher picture definition than a picture definition of the first camera and connected to the shared line with no buffer therebetween; a processor for outputting a first control signal controlling an operation of the first camera and of the 3-state buffer through a first terminal and for outputting a second control signal controlling an operation of the second camera through a second terminal; the shared line between the 3 state buffer and the processor; and the 3-state buffer, electrically connected between the first camera and the shared line, for receiving the first control signal and connecting or disconnecting between the first camera and the shared line depending on the received first control signal, wherein the first control signal and the second control signal have different values, wherein the 3-state buffer disconnects only the first camera from the shared line at a time of operation of the second camera having the higher picture definition, and wherein the second camera having the higher picture definition is continuously connected to the shared line at a time of operation of the first camera.