Patent ID: 7561213
Filing Date: 2009-07-14
Classification: H01Q,H04N

Abstract:
1. A television broadcast receiver comprising: a television broadcast signal receiving unit connected via an RF terminal to a unidirectional antenna having a single receiving direction, or to a multi-directional antenna having multiple receiving directions, for receiving a television broadcast signal; a control signal communication unit connected via a control signal input/output terminal to an antenna controller of the multi-directional antenna for sending a control signal to the antenna controller, and for receiving a response signal from the antenna controller in response to the control signal, in which the antenna controller is provided to change an active receiving direction of the multi-directional antenna; a first antenna connection identification unit for identifying the kind of antenna connected to the RF terminal and/or the control signal input/output terminal, whether the multi-directional antenna is capable of the two-way communication or not, by communication using the control signal communication unit to send a first antenna identification signal to the antenna controller of the connected antenna which sends back a response signal if a multi-directional antenna capable of the two-way communication is connected to the television broadcast signal receiving unit, so as to determine that the multi-directional antenna capable of the two-way communication is connected to the television broadcast signal receiving unit if the first antenna connection identification unit receives the response signal, and to determine that the multi-directional antenna capable of the two-way communication is disconnected from the television broadcast signal receiving unit if the first antenna connection identification unit does not receive the response signal; a second antenna connection identification unit for identifying whether or not a multi-directional antenna capable of one-way communication and having a current active receiving direction is connected to the television broadcast signal receiving unit if the first antenna connection identification unit identifies that the multi-directional antenna capable of the two-way communication is disconnected from the television broadcast signal receiving unit, in which the second antenna connection identification unit performs the identification by communication using the control signal communication unit to send, to the connected antenna, a control signal to change the current active receiving direction of the multi-directional antenna to a further active receiving direction, so as to determine that the multi-directional antenna capable of the one-way communication is connected to the television broadcast signal receiving unit if intensity of a television broadcast signal received and measured in the further active receiving direction is significantly varied from that in the current receiving direction, and to determine that the multi-directional antenna capable of the one-way communication is disconnected from the television broadcast signal receiving unit if the intensity of the television broadcast signal received and measured in the further active receiving direction is not significantly varied from that in the current receiving direction; a message display unit for displaying, to a user, a message indicating that a multi-directional antenna is disconnected from the television broadcast signal receiving unit if the identification by the first antenna connection identification unit and the second antenna connection identification unit indicates that the kind of antenna connected to the television broadcast signal receiving unit is not a multi-directional; and an antenna control unit for sending, to the antenna controller, a control signal for each multi-directional antenna using the control signal communication unit on the basis of the kind of multi-directional antenna as identified by the first antenna connection identification unit and the second antenna connection identification unit, so as to control the each identified multi-directional antenna.