Display device and driver thereof

Abstract

The present disclosure relates to a driver for driving a light emitting unit array of a display device, the driver including: a plurality of driving units, each of the plurality of driving units includes: a driving circuit configured to provide a driving current to a corresponding column of light emitting units in the light emitting unit array according to a pulse width modulation signal, during a turn-on period of a channel switch; a regulating circuit configured to be connected in parallel with the driving circuit and be turned on according to the pulse width modulation signal to form a path with the corresponding column of the light emitting units, such that a current associated with the light emitting units flows through the path.

What is claimed is: 
     
         1 . A driver for driving a light emitting unit array of a display device, the driver including a plurality of driving units, each of the plurality of driving units includes:
 a driving circuit configured to provide a driving current to a corresponding column of light emitting units in the light emitting unit array according to a pulse width modulation signal, during a turn-on period of a channel switch; and   a regulating circuit configured to be connected in parallel with the driving circuit and be turned-on according to the pulse width modulation signal to form a path with the corresponding column of the light emitting units, such that a current associated with the light emitting units flows through the path.   
     
     
         2 . The driver according to  claim 1 , wherein the regulating circuit includes a charge path circuit, and the charge path circuit is configured to be turned-on during the turn-on period of the channel switch to form a charge path, and provide a charging current to the corresponding column of the light emitting units through the charge path. 
     
     
         3 . The driver according to  claim 2 , each of the driving units further including a mixed-signal controller coupled to the charge path circuit, and the mixed-signal controller configured to:
 control the turn-on of the charge path circuit according to an edge of the pulse width modulation signal; wherein   output a first control signal to the charge path circuit when a rising edge of the pulse width modulation signal is detected, to turn-on a first switching element of the charge path circuit so that the charge path circuit is turned-on.   
     
     
         4 . The driver according to  claim 3 , wherein the mixed-signal controller is further configured to:
 receive a first instruction indicating a number of light emitting units to be driven, and adjust an intensity of turn-on of the charge path circuit according to the first instruction.   
     
     
         5 . The driver according to  claim 4 , wherein the adjusting the intensity of turn-on of the charge path circuit includes:
 making a turn-on duration of the charge path circuit and/or a value of the charging current output by the charge path circuit to be inversely proportional to the number of light emitting units to be driven indicated by the first instruction.   
     
     
         6 . The driver according to  claim 3 , wherein the mixed-signal controller is further configured to:
 receive a second instruction indicating the display device enters a power saving mode, and set the intensity of turn-on of the charge path circuit to a fixed value according to the second instruction.   
     
     
         7 . The driver according to  claim 3 , wherein the mixed-signal controller is further configured to:
 receive display data;   generate the pulse width modulation signal and provide it to the driving circuit, wherein the pulse width of the generated pulse width modulation signal is based on the display data.   
     
     
         8 . The driver according to  claim 1 , wherein the regulating circuit includes a discharge path circuit, and the discharge path circuit is configured to be turned-on after the channel switch is turned off, to form a discharge path, so that the residual charges of the corresponding column of the light emitting units are discharged through the discharge path. 
     
     
         9 . The driver according to  claim 8 , wherein each of the driving units further includes a mixed-signal controller coupled to the discharge path circuit, and the mixed-signal controller is configured to:
 control the turn-on of the discharge path circuit according to an edge of the pulse width modulation signal; wherein   output a second control signal to the discharge path circuit, when a falling edge of the pulse width modulation signal is detected, to turn-on a second switching element of the discharge path circuit so that the discharge path circuit is turned-on.   
     
     
         10 . The driver according to  claim 9 , wherein the mixed-signal controller is further configured to:
 receive a third instruction indicating a number of light emitting units to be turned off, and adjust an intensity of turn-on of the discharge path circuit according to the third instruction.   
     
     
         11 . The driver according to  claim 10 , wherein the adjusting the intensity of turn-on of the discharge path circuit includes:
 making a turn-on duration of the discharge path circuit and/or a value of the discharged current flowing through the discharge path circuit to be inversely proportional to the number of light emitting units to be turned off indicated by the third instruction.   
     
     
         12 . The driver according to  claim 9 , wherein the mixed-signal controller is further configured to:
 receive a second instruction indicating the display device enters a power saving mode, and set the intensity of turn-on of the discharge path circuit to a fixed value according to the second instruction.   
     
     
         13 . The driver according to  claim 9 , wherein the mixed-signal controller is further configured to:
 receive display data;   generate the pulse width modulation signal and provide it to the driving circuit, wherein the pulse width of the generated pulse width modulation signal is based on the display data.   
     
     
         14 . A driver for driving a light emitting unit array of a display device, the driver including:
 a plurality of driving units, each of the plurality of driving units includes:
 a driving circuit configured to provide a driving current to a corresponding column of light emitting units in the light emitting unit array according to a pulse width modulation signal, during a turn-on period of a channel switch; 
 a charge path circuit configured to be connected in parallel with the driving circuit, and to be turned on during the turn-on period of the channel switch to form a charge path, and provide a charging current to the corresponding column of the light emitting units through the charge path; and 
 a discharge path circuit configured to be connected in parallel with the driving circuit, and to be turned-on after the channel switch is turned off, to form a discharge path, so that the residual charges of the corresponding column of the light emitting units are discharged through the discharge path. 
   
     
     
         15 . The driver according to  claim 14 , wherein each of the driving units further includes a mixed-signal controller coupled to the charge path circuit and the discharge path circuit, and the mixed-signal controller configured to:
 control the turn-on of the charge path circuit and the discharge path circuit according to an edge of the pulse width modulation signal; wherein   output a first control signal to the charge path circuit when a rising edge of the pulse width modulation signal is detected, to turn-on a first switching element of the charge path circuit so that the charge path circuit is turned-on; and   output a second control signal to the discharge path circuit, when a falling edge of the pulse width modulation signal is detected, to turn-on a second switching element of the discharge path circuit so that the discharge path circuit is turned-on.   
     
     
         16 . The driver according to  claim 15 , wherein the mixed-signal controller is further configured to:
 receive a first instruction indicating a number of light emitting units to be driven and a third instruction indicating a number of light emitting units to be turned off, and   adjust an intensity of turn-on of the charge path circuit according to the first instruction and adjust an intensity of turn-on of the discharge path circuit according to the third instruction.   
     
     
         17 . The driver according to  claim 16 , wherein
 the adjusting the intensity of turn-on of the charge path circuit includes: making a turn-on duration of the charge path circuit and/or a value of the charging current output by the charge path circuit to be inversely proportional to the number of light emitting units to be driven indicated by the first instruction; and   the adjusting the intensity of turn-on of the discharge path circuit includes: making a turn-on duration of the discharge path circuit and/or a value of the discharged current flowing through the discharge path circuit to be inversely proportional to the number of light emitting units to be turned off indicated by the third instruction.   
     
     
         18 . The driver according to  claim 15 , wherein the mixed-signal controller is further configured to:
 receive a second instruction indicating the display device enters a power saving mode, and set the intensity of turn-on of the charge path circuit/discharge path circuit to a fixed value according to the second instruction.   
     
     
         19 . The driver according to  claim 15 , wherein the mixed-signal controller is further configured to:
 receive display data;   generate the pulse width modulation signal and provide it to the driving circuit, wherein the pulse width of the generated pulse width modulation signal is based on the display data.   
     
     
         20 . A display device, including:
 a light emitting array consisting of a plurality of light emitting units;   the driver according to  claim 1 , each of the plurality of driving units in the driver is coupled to each column of the plurality of light emitting units to drive a corresponding column of the light emitting units;   a scanning module coupled to each row of the plurality of light emitting units to provide a scanning signal to a corresponding row of the light emitting units.   
     
     
         21 . The display device according to  claim 20 , a type of the display device is a mini-LED or a micro-LED.