Driving apparatus and driving method for LED display, and LED display

1 . A driving apparatus for a light-emitting diode (LED) display, wherein the driving apparatus comprises:

a power supply unit configured to provide a driving voltage for an LED in each pixel circuit in the LED display, wherein the LED display is different than an organic light-emitting diode (OLED) display;

a temperature sensor configured to collect a first temperature value of the LED display, wherein the first temperature value represents an average temperature value of at least one pixel circuit in the LED display; and

a control unit coupled to the power supply unit and configured to control, based on the first temperature value, the power supply unit to dynamically adjust the driving voltage that is applied to the LED in each pixel circuit.

2 . The driving apparatus according to claim 1 , wherein:

each pixel circuit further comprises a current generation unit and a metal-oxide semiconductor field-effect transistor that are separately connected in series to the LED;

the current generation unit is configured to provide a constant current for the pixel circuit; and

the metal-oxide semiconductor field-effect transistor is configured to control the LED to be in a conducted state or a cut-off state.

3 . The driving apparatus according to claim 2 , wherein the control unit is specifically configured to:

determine, based on the first temperature value and a preset curve relationship between a temperature value and an operating voltage of the LED, a target operating voltage corresponding to a first LED in a first pixel circuit in the LED display; and

determine, based on the target operating voltage, a driving voltage that is applied by the power supply unit to the first pixel circuit.

4 . The driving apparatus according to claim 3 , wherein the preset curve relationship between the temperature value and the operating voltage of the LED is a linear relationship.

5 . The driving apparatus according to claim 4 , wherein when the metal-oxide semiconductor field-effect transistor is a positive metal-oxide semiconductor field-effect transistor, a cathode of the first LED is connected to the power supply unit, and an anode of the first LED is connected to a source of the positive metal-oxide semiconductor field-effect transistor; and wherein

the control unit is specifically configured to:

determine, based on the target operating voltage, a driving voltage that is applied by the power supply unit to the cathode of the first LED in the first pixel circuit.

6 . The driving apparatus according to claim 4 , wherein when the metal-oxide semiconductor field-effect transistor is a negative metal-oxide semiconductor field-effect transistor, an anode of the first LED is connected to the power supply unit, and a cathode of the first LED is connected to a drain of the negative metal-oxide semiconductor field-effect transistor; and wherein

the control unit is specifically configured to:

determine, based on the target operating voltage, a driving voltage that is applied by the power supply unit to the anode of the first LED in the first pixel circuit.

7 . The driving apparatus according to claim 1 , wherein there are a plurality of temperature sensors, and the plurality of temperature sensors are separately disposed at different positions on the LED display.

8 . The driving apparatus according to claim 7 , wherein when there are two temperature sensors, the two temperature sensors are respectively disposed at diagonal positions on the LED display; or wherein

when there are four temperature sensors, the four temperature sensors are respectively disposed at four corners of the LED display.

9 . A driving method for a light-emitting diode (LED) display, wherein the method comprises:

receiving a first temperature value of the LED display collected by a temperature sensor, wherein the first temperature value represents an average temperature value of at least one pixel circuit in the LED display, wherein the LED display is different than an organic light-emitting diode (OLED) display; and

controlling, based on the first temperature value, a power supply unit to dynamically adjust a driving voltage that is applied to an LED in each pixel circuit in the LED display.

10 . The driving method according to claim 9 , further comprising:

providing a constant current for each pixel circuit; and

controlling the LED to be in a conducted state or a cut-off state.

11 . The driving method according to claim 9 , further comprising:

determining, based on the first temperature value and a preset curve relationship between a temperature value and an operating voltage of the LED, a target operating voltage corresponding to a first LED in a first pixel circuit in the LED display; and

determining, based on the target operating voltage, a driving voltage that is applied by the power supply unit to the first pixel circuit.

12 . The driving method according to claim 11 , wherein the preset curve relationship between the temperature value and the operating voltage of the LED is a linear relationship.

13 . A light-emitting diode (LED) display comprising a plurality of pixel circuits and a driving apparatus connected to the plurality of pixel circuits, wherein the driving apparatus comprises:

a power supply unit configured to provide a driving voltage for an LED in each pixel circuit in the LED display, wherein the LED display is different than an organic light-emitting diode (OLED) display;

a temperature sensor configured to collect a first temperature value of the LED display, wherein the first temperature value represents an average temperature value of at least one pixel circuit in the LED display; and

a control unit coupled to the power supply unit and configured to control, based on the first temperature value, the power supply unit to dynamically adjust the driving voltage that is applied to the LED in each pixel circuit.

14 . The LED display according to claim 13 , wherein:

each pixel circuit further comprises a current generation unit and a metal-oxide semiconductor field-effect transistor that are separately connected in series to the LED;

the current generation unit is configured to provide a constant current for the pixel circuit; and

the metal-oxide semiconductor field-effect transistor is configured to control the LED to be in a conducted state or a cut-off state.

15 . The LED display according to claim 14 , wherein the control unit is configured to:

determine, based on the first temperature value and a preset curve relationship between a temperature value and an operating voltage of the LED, a target operating voltage corresponding to a first LED in a first pixel circuit in the LED display; and

determine, based on the target operating voltage, a driving voltage that is applied by the power supply unit to the first pixel circuit.

16 . The LED display according to claim 15 , wherein the preset curve relationship between the temperature value and the operating voltage of the LED is a linear relationship.

17 . The LED display according to claim 16 , wherein when the metal-oxide semiconductor field-effect transistor is a positive metal-oxide semiconductor field-effect transistor, a cathode of the first LED is connected to the power supply unit, and an anode of the first LED is connected to a source of the positive metal-oxide semiconductor field-effect transistor; and wherein

the control unit is specifically configured to:

determine, based on the target operating voltage, a driving voltage that is applied by the power supply unit to the cathode of the first LED in the first pixel circuit.

18 . The LED display according to claim 16 , wherein when the metal-oxide semiconductor field-effect transistor is a negative metal-oxide semiconductor field-effect transistor, an anode of the first LED is connected to the power supply unit, and a cathode of the first LED is connected to a drain of the negative metal-oxide semiconductor field-effect transistor; and wherein

the control unit is specifically configured to:

determine, based on the target operating voltage, a driving voltage that is applied by the power supply unit to the anode of the first LED in the first pixel circuit.

19 . The LED display according to claim 13 , wherein there are a plurality of temperature sensors, and the plurality of temperature sensors are separately disposed at different positions on the LED display.

20 . The LED display according to claim 19 , wherein when there are two temperature sensors, the two temperature sensors are respectively disposed at diagonal positions on the LED display; or wherein

when there are four temperature sensors, the four temperature sensors are respectively disposed at four corners of the LED display.