Display system and method of operating display system
The present disclosure relates to a display system and a method of operating the display system for enabling display to be continued even if any of a plurality of power supply devices for normal luminance fails in a case where a power supply device for a high-luminance direct-view light emitting diode (LED) display is implemented by the plurality of power supply devices for normal luminance. A plurality of normal-luminance power supplies that supplies power necessary for driving a driver group that drives light emitting diodes (LEDs) arranged in an array on the basis of a video signal in a normal-luminance mode, and a power supply switch that switches on/off of power supply from the plurality of normal-luminance power supplies to the driver group are provided, and when an abnormality is detected in the power supply, the power supply switch is turned off, and the LEDs are switched from a high-luminance mode to the normal luminance mode and are driven, and then the power supply switch is controlled to be turned on. The present disclosure can be applied to an LED display device.
1 . A display system, comprising:
a driver configured to drive, based on a video signal, a display element in one of a first luminance mode or a second luminance mode;
a plurality of power supply devices, wherein
each of the plurality of power supply devices is configured to supply, to the driver, a respective amount of power to drive the display element in one of the first luminance mode or the second luminance mode,
the display element is in a first luminance range in the first luminance mode,
the display element is in a second luminance range in the second luminance mode, and
the second luminance range is higher in luminance than the first luminance range;
a power supply switch; and
a driver control unit configured to:
control the driver to drive the display element in the second luminance mode based on the respective amount of power from the each of the plurality of power supply devices;
detect an abnormality in at least one of the plurality of power supply devices;
control, based on the detected abnormality, the power supply switch to turn off a power supply from the at least one of the plurality of power supply devices to the driver;
control, based on the turned off power supply, the driver to switch the display element from the second luminance mode to the first luminance mode; and
control, in the first luminance mode, the power supply switch to turn on the power supply from the at least one of the plurality of power supply devices to the driver.
2 . The display system according to claim 1 , wherein the driver control unit is further configured to control the driver to drive the display element in the second luminance mode based on an absence of the abnormality in the at least one of the plurality of power supply devices.
3 . The display system according to claim 1 , wherein
the plurality of power supply devices is associated with a plurality of current values,
the each of the plurality of power supply devices is further configured to:
perform a sharing control process such that each of the plurality of current values is equal; and
supply, in parallel, the respective amount of power to the driver.
4 . The display system according to claim 1 , wherein the plurality of power supply devices includes two power supply devices.
5 . The display system according to claim 1 , wherein
each of the plurality of power supply devices includes a respective abnormality detection unit,
the respective abnormality detection unit is configured to:
detect a respective abnormality in a respective power supply device of the plurality of power supply devices; and
output a respective abnormality detection signal based on the detected respective abnormality, and
based on the output of the respective abnormality detection signal, the driver control unit is further configured to:
control the power supply switch to turn off a power supply, to the driver, from the respective power supply device of the plurality of power supply devices;
control, based on the turned off power supply from the respective power supply device of the plurality of power supply devices, the driver to switch the display element from the second luminance mode to the first luminance mode; and
control the power supply switch to turn on the power supply, to the driver, from the respective power supply device of the plurality of power supply devices.
6 . The display system according to claim 5 , wherein the driver control unit is further configured to:
control, based on the turned off power supply from the respective power supply device of the plurality of power supply devices, the driver to switch the display element from the second luminance mode to the first luminance mode;
transmit a re-energization signal to the power supply switch; and
control, based on the re-energization signal, the power supply switch to turn on the power supply, to the driver, from the respective power supply device of the plurality of power supply devices.
7 . The display system according to claim 1 , wherein
the each of the plurality of power supply devices includes a respective abnormality detection unit,
the respective abnormality detection unit is configured to:
detect a respective abnormality in a respective power supply device of the plurality of power supply devices; and
output a respective abnormality detection signal based on the detected respective abnormality, and
based on the output of the respective abnormality detection signal, the driver control unit is further configured to:
control the power supply switch to turn off a power supply, to the driver, from the respective power supply device of the plurality of power supply devices;
control, based on the turned off power supply from the respective power supply device of the plurality of power supply devices, the driver to switch the display element from the second luminance mode to the first luminance mode; and
control, in the first luminance mode, the power supply switch to turn on the power supply, to the driver, from the respective power supply device of the plurality of power supply devices.
8 . The display system according to claim 1 , further comprising a signal processing unit and an abnormality detection signal switch, wherein
the signal processing unit is configured to perform, in the second luminance mode, a video signal process on the video signal,
the video signal is associated with a specific luminance after the performance of the video signal process,
the each of the plurality of power supply devices includes:
a respective abnormality detection unit configured to:
detect a respective abnormality in a respective power supply device of the plurality of power supply devices; and
output, to the power supply switch, a respective abnormality detection signal based on the detected respective abnormality; and
the abnormality detection signal switch is configured to control the output of the respective abnormality detection signal to the power supply switch, and
the driver control unit is further configured to control, based on the specific luminance, the abnormality detection signal switch to one of
turn on a connection between the respective power supply device of the plurality of power supply devices and the power supply switch, or
turn off the connection between the respective power supply device of the plurality of power supply devices and the power supply switch.
9 . The display system according to claim 8 , wherein
the driver control unit is further configured to control, based on the specific luminance is in the first luminance range, the abnormality detection signal switch to one of
turn on the connection between the respective power supply device of the plurality of power supply devices and the power supply switch, or
turn off the connection between the respective power supply device of the plurality of power supply devices and the power supply switch.
10 . The display system according to claim 9 , wherein
the driver control unit is further configured to:
control, based on the specific luminance is in the first luminance range, the abnormality detection signal switch to turn off the connection between the respective power supply device of the plurality of power supply devices and the power supply switch; and
control, based on the specific luminance is different from the first luminance range, the abnormality detection signal switch to turn on the connection between the respective power supply device of the plurality of power supply devices and the power supply switch.
11 . The display system according to claim 1 , further comprising:
a plurality of display units that includes:
the plurality of power supply devices,
the power supply switch, and
the driver control unit; and
a controller configured to:
perform a video signal process on the video signal, and
supply, based on the video signal process, the video signal to the plurality of display units, wherein
the driver control unit is further configured to transmit, to the controller, a first notification associated with the abnormality in the at least one of the plurality of power supply devices.
12 . The display system according to claim 11 , wherein
the controller is further configured to:
perform the video signal process on the video signal in the first luminance mode; and
supply the video signal to the plurality of display units based on the transmitted first notification.
13 . The display system according to claim 11 , wherein
the controller is further configured to output, based on the transmitted first notification, information associated with the detected abnormality in the at least one of the plurality of power supply devices.
14 . The display system according to claim 11 , wherein
the driver control unit is further configured to transmit a second notification, to the controller,
the second notification is associated with a respective abnormality in each of the plurality of power supply devices, and
the plurality of display units is configured to display a black screen based on the transmitted second notification.
15 . The display system according to claim 11 , wherein
the plurality of display units is in an array,
a video wall includes the array, and
the video signal forms an image on the video wall.
16 . The display system according to claim 15 , wherein
the plurality of display units includes a first display unit and a second display unit,
the first display unit is connected to the second display unit, and
the controller is further configured to supply the video signal to the second display unit via the first display unit.
17 . A method, comprising:
in a display system:
driving, by a driver, a display element based on a video signal, wherein the display element is in one of a first luminance mode or a second luminance mode;
supplying, by each of a plurality of power supply devices, a respective amount of power for driving the display element in the one of the first luminance mode or the second luminance mode, wherein
the display element is in a first luminance range in the first luminance mode,
the display element is in a second luminance range in the second luminance mode, and
the second luminance range is higher in luminance than the first luminance range;
controlling the driver to drive the display element in the second luminance mode based on the respective amount of power from the each of the plurality of power supply devices;
detecting an abnormality in at least one of the plurality of power supply devices;
controlling, based on the detected abnormality, a power supply switch to turn off a power supply from the at least one of the plurality of power supply devices to the driver;
controlling, based on the turned off power supply, the driver to switch the display element from the second luminance mode to the first luminance mode; and
controlling, in the first luminance mode, the power supply switch to turn on the power supply from the at least one of the plurality of power supply devices to the driver.