Display device with cooling control

1. A display device comprising:

a display panel;

a cooling unit cooling air in a casing containing the display panel;

a fan unit generating an air flow in the casing; and

a control unit controlling the cooling unit and the fan unit, wherein

when the control unit deactivates the cooling unit, the control unit also deactivates the fan unit, and

wherein the control unit activates the fan unit while keeping the cooling unit deactivated, when a predetermined time has elapsed from the deactivation of the cooling unit and the fan unit.

2. The display device according to claim 1 , further comprising:

a circulation flow passage inside the casing, surrounding the display panel, wherein

the control unit operates the cooling unit to cool the air in the circulation flow passage, and operates the fan unit to circulate the air in the circulation flow passage.

3. The display device according to claim 1 , further comprising:

a detecting unit detecting temperature, wherein

the control unit activates the fan unit while keeping the cooling unit deactivated based on the temperature detected by the detecting unit after the deactivation of the fan unit.

4. The display device according to claim 3 , further comprising:

a circulation flow passage in the casing, circulating around the display panel, wherein

the detecting unit comprises a first detecting part and a second detecting part arranged on the front surface side and the rear surface side of the display panel respectively,

the control unit activates the fan unit while keeping the cooling unit deactivated based on a difference between the temperature detected by the first detecting part and the temperature detected by the second detecting part, after the deactivation of the cooling unit and the fan unit.