X-ray tube and a controller thereof

A controller for an X-ray tube, wherein

• the X-ray tube comprising:
• an electron emission part including an electron emission element using a cold cathode;
• an anode part having an anode surface with which an electron emitted from the electron emission part collides;
• and
• a focusing structure disposed between the electron emission part and a target part disposed on the anode surface,
• the focusing structure having a plurality of focusing areas that are applied with a voltage in a mutually independent manner,
• the electron emission part having first and second electron beam emission areas that are on/off controlled in a mutually independent manner, and
• the X-ray tube being designed in such a way that a collision area of the electron beam emitted from each of the first and second electron beam emission areas on the anode surface moves in response to a voltage applied to each of the plurality of focusing areas, wherein
• the controller alternately turns on/off the first and second electron beam emission areas in sync with the voltage applied to each of the plurality of focusing areas.

A controller for an X-ray tube, wherein

• the X-ray tube comprising:
• an electron emission part including an electron emission element using a cold cathode;
• an anode part having an anode surface with which an electron emitted from the electron emission part collides;
• and
• a focusing structure disposed between the electron emission part and a target part disposed on the anode surface,
• the focusing structure having two focusing areas that are applied with a voltage in a mutually independent manner,
• the electron emission part having first and second electron beam emission areas that are on/off controlled in a mutually independent manner, and
• the X-ray tube being designed in such a way that a collision area of the electron beam emitted from each of the first and second electron beam emission areas on the anode surface moves in response to a voltage applied to each of the two focusing areas, wherein
• the controller alternately applies a voltage to the two focusing areas during driving of the electron emission part to move the collision area.

A controller for an X-ray tube, wherein

• the X-ray tube comprising:
• an electron emission part including an electron emission element using a cold cathode;
• an anode part having an anode surface with which an electron emitted from the electron emission part collides;
• and
• a focusing structure disposed between the electron emission part and a target part disposed on the anode surface,
• the focusing structure having a plurality of focusing areas that are applied with a voltage in a mutually independent manner,
• the electron emission part having first and second electron beam emission areas that are on/off controlled in a mutually independent manner, and
• the X-ray tube being designed in such a way that a collision area of the electron beam emitted from each of the first and second electron beam emission areas on the anode surface moves in response to a voltage applied to each of the plurality of focusing areas, wherein
• the controller changes stepwise a voltage to be applied to the each of the plurality of focusing areas during driving of the electron emission part to dynamically move the collision area.

A controller for an X-ray tube, wherein

• the X-ray tube comprising:
• a plurality of electron emission parts each including an electron emission element using a cold cathode;
• an anode part having an anode surface with which an electron emitted from each of the plurality of electron emission parts collides;
• and
• a plurality of focusing structures each disposed between each of the plurality of electron emission parts and a target part disposed on the anode surface,
• the plurality of focusing structures each having a plurality of focusing areas that are applied with a voltage in a mutually independent manner,
• the plurality of electron emission parts each having first and second electron beam emission areas that are on/off controlled in a mutually independent manner, and
• the X-ray tube being designed in such a way that a collision area of the electron beam emitted from each of the first and second electron beam emission areas belonging to each of the plurality of electronic emission parts on the anode surface moves in response to a voltage applied to each of the plurality of corresponding focusing areas, wherein
• the controller sequentially controls the plurality of electron beam emission parts to sequentially emit an X-ray from a plurality of different areas on the anode surface.