Driving system, display system, and display device
A driving system, a display system, and a display device are disclosed. The driving system includes a timing controller and a plurality of display drivers; the timing controller is connected to the display drivers, respectively; each display driver includes a regional dimming signal generation unit and an LED driving control unit. After the timing controller transmits a first display data packet to each display driver, the regional dimming signal generation unit in each display driver generates a corresponding backlight brightness signal according to the first display data packet, and the LED driving control unit in each display driver generates a plurality of corresponding LED driving control signals according to the backlight brightness signal, so that the display driver can also drive a backlight circuit.
1 . A driving system, comprising a timing controller and a plurality of display drivers; wherein
the timing controller is connected to each of the plurality of display drivers respectively;
each of the plurality of display drivers comprises a local dimming signal generation circuit and an LED drive control circuit; wherein the local dimming signal generation circuit comprises a first processor, and the LED drive control circuit comprises a second processor; and
after the timing controller transmits a first display data packet to each of the plurality of display drivers, the first processor of the local dimming signal generation circuit in each of the plurality of display drivers is configured to generate a corresponding backlight brightness signal according to the first display data packet, and the second processor of the LED drive control circuit in each of the plurality of display drivers is configured to generate a plurality of corresponding LED drive control signals according to the backlight brightness signal;
wherein the first display data packet comprises video data and configuration parameters of each of the plurality of display drivers; the display driver determines a processing mode of the display driver according to the configuration parameters of the display driver; the first processor of the local dimming signal generation circuit in the display driver is configured to generate the corresponding backlight brightness signal according to the video data; and the second processor of the LED drive control circuit in the display driver is configured to generate the corresponding LED drive control signals according to the backlight brightness signal.
2 . The driving system according to claim 1 , wherein each of the plurality of display drivers comprises a plurality of LED drive control terminals, and each of the plurality of LED drive control terminals outputs a corresponding one of the plurality of corresponding LED drive control signals.
3 . A display system, comprising a main controller, an LCD panel, a backlight circuit and the driving system according to claim 1 ;
wherein the main controller is connected to the timing controller of the driving system, each LED drive control terminal of the display driver is connected to the backlight circuit, and an LCD drive signal output terminal of the display driver is connected to the LCD panel.
4 . The display system according to claim 3 , wherein the backlight circuit comprises a plurality of backlight units, and a quantity of backlight units is the same as a quantity of display drivers in the driving system.
5 . The display system according to claim 4 , wherein each of the plurality of backlight units comprises a plurality of groups of cascaded LED drivers, and a quantity of LED drive control terminals in each of the plurality of display drivers is the same as a quantity of groups of cascaded LED drivers in each backlight unit.
6 . The display system according to claim 3 , wherein the display system further comprises a main control board, a timing control board, a source board, at least one flexible display drive board, at least one flexible circuit board for serial transmission and a plurality of flat cables;
the timing controller is connected to the timing control board, and the main controller is connected to the main control board;
the LCD panel comprises a plurality of LCD drive signal input interfaces;
each of the at least one flexible display drive board is connected to one of the display drivers; and
the main control board is connected to the timing control board through the flat cable, the timing control board is connected to the source board through the flat cable, the source board is connected to corresponding cascaded LED drivers through each of the at least one flexible circuit board for serial transmission, the source board is connected to each of the at least one flexible display drive board, and each of the at least one flexible display drive board is connected to a corresponding LCD drive signal input interface;
wherein a quantity of display drivers is the same as a quantity of flexible display drive boards, and is the same as a quantity of flexible circuit boards for serial transmission.
7 . The display system according to claim 6 , wherein an LED drive control signal output from the LED drive control terminal of each of the display drivers is transmitted to the corresponding cascaded LED drivers through the source board and the flexible circuit board for serial transmission.
8 . The display system according to claim 3 , wherein the display system further comprises a main control board, a timing control board, at least one flexible display drive board, at least one flexible circuit board for serial transmission and a plurality of flat cables;
the timing controller is connected to the timing control board, and the main controller is connected to the main control board;
the LCD panel comprises a plurality of LCD drive signal input interfaces;
each of the at least one flexible display drive board is connected to one of the display drivers;
the main control board is connected to the timing control board through the flat cable, the timing control board is connected to corresponding cascaded LED drivers through each of the at least one flexible circuit board for serial transmission, the timing control board is connected to each of the at least one flexible display drive board, and each of the at least one flexible display drive board is connected to a corresponding LCD drive signal input interface;
wherein a quantity of display drivers is the same as a quantity of flexible display drive boards, and is the same as a quantity of flexible circuit boards for serial transmission.
9 . The display system according to claim 8 , wherein an LED drive control signal output from the LED drive control terminal of each of the display drivers is transmitted to the corresponding cascaded LED drivers through the timing control board and the flexible circuit board for serial transmission.
10 . A display device, comprising the display system according to claim 3 .
11 . A driving system, comprising: a timing controller and a plurality of display drivers, wherein the timing controller is connected to each of the plurality of display drivers respectively;
each of the plurality of display drivers comprises an LED drive control circuit;
the timing controller comprises a local dimming signal generation circuit;
wherein the local dimming signal generation circuit comprises a first processor, and the LED drive control circuit comprises a second processor;
after the timing controller transmits a second display data packet comprising a plurality of backlight brightness signals to each of the plurality of display drivers, the second processor of the LED drive control circuit in each of the plurality of display drivers is configured to obtain a backlight brightness signal from the second display data packet and generate a corresponding LED drive control signal according to the backlight brightness signal;
wherein the second display data packet further comprises video data and configuration parameters of each of the plurality of display drivers; each of the plurality of display drivers determines its processing mode according to the configuration parameters.
12 . A display system, comprising a main controller, an LCD panel, a backlight circuit and a driving system according to claim 11 ;
wherein the main controller is connected to the timing controller of the driving system, the plurality of display drivers are connected to the backlight circuit, and the plurality of display drivers are connected to the LCD panel.
13 . A display device, comprising the display system according to claim 12 .