Display device and control method therefor

1. A display device comprising:

a display including a display panel and a backlight unit arranged on a rear surface of the display panel;

a light emitting frame including a plurality of light emitting elements, the light emitting frame being arranged on at least one edge of the display;

a backlight driver; and

a processor configured to:

control the backlight driver so as to supply power to the backlight unit based on an event for turning on the display occurring, and

supply power to the light emitting frame based on an event for turning off the display occurring,

wherein the backlight driver comprises:

a constant current supply circuit which adjusts a size of a constant current based on a dimming signal output from the processor;

an inverter;

a first transistor which is serially connected to the backlight unit, and of which a control terminal is connected to one of an input end of the inverter or an output end of the inverter; and

a second transistor which is serially connected to the plurality of light emitting elements included in the light emitting frame, and of which a control terminal is connected to the input end of the inverter when the control terminal of the first transistor is connected to the output end of the inverter or the output end of the inverter when the control terminal of the first transistor is connected to the input end of the inverter; and

wherein the processor is further configured to:

apply a selection signal to the input end of the inverter and control the backlight driver such that the constant current is provided to one of the backlight unit or the light emitting frame.

2. The display device of claim 1 ,

wherein the processor is further configured to:

based on the event for turning off the display occurring, control the backlight driver so as to stop supply of power to the backlight unit, and supply power to the light emitting frame.

3. The display device of claim 1 ,

wherein the backlight driver further comprises a discharge circuit connected to an output end of the constant current supply circuit, and

wherein the processor is further configured to:

based on an event changing the display from a turned-on state to a turned-off state or from a turned-off state to a turned-on state occurring, stop output of the dimming signal and control the backlight driver such that the discharge circuit operates during a first threshold time, and output the dimming signal after a second threshold time after changing a level of the selection signal.

4. The display device of claim 3 ,

wherein the processor is further configured to:

based on the event changing the display from a turned-on state to a turned-off state or from a turned-off state to a turned-on state, stop output of the dimming signal and identify at least one of:

whether the discharge circuit operates, or

an operating time based on a driving voltage of the backlight unit and a driving voltage of the light emitting frame.

5. The display device of claim 3 ,

wherein the first threshold time is determined based on a driving voltage of the backlight unit and a driving voltage of the light emitting frame.

6. The display device of claim 3 ,

wherein the backlight driver further comprises a capacitor connected to an output end of the constant current supply circuit, and

wherein the discharge circuit comprises:

a resistance of which one end is connected to one end of the capacitor; and

a transistor of which one end is connected to an other end of the resistance, and of which an other end is connected to the other end of the capacitor, and

wherein the processor is further configured to:

control an operation of the discharge circuit by applying a discharge signal to a control terminal of the transistor.

7. The display device of claim 1 ,

wherein the light emitting frame further comprises:

a first terminal and a second terminal shorted from the first terminal, and

wherein the processor is further configured to:

apply a reference signal to one of the first terminal or the second terminal, and identify whether the light emitting frame is installed based on whether the reference signal is detected from the first terminal when the reference signal is applied to the second terminal or the second terminal when the reference signal is applied to the first terminal.

8. The display device of claim 7 ,

wherein the processor is further configured to:

based on identifying that the light emitting frame is not installed on the display device, if the event for turning off the display occurs, stop driving of the backlight driver.

9. The display device of claim 1 ,

wherein the light emitting frame further comprises a shield for shielding emission of a light emitted from the light emitting frame to a front side of the display device.