WO2024041448A1 - 驱动系统、显示系统及显示装置 - Google Patents

驱动系统、显示系统及显示装置 Download PDF

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Publication number
WO2024041448A1
WO2024041448A1 PCT/CN2023/113599 CN2023113599W WO2024041448A1 WO 2024041448 A1 WO2024041448 A1 WO 2024041448A1 CN 2023113599 W CN2023113599 W CN 2023113599W WO 2024041448 A1 WO2024041448 A1 WO 2024041448A1
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WIPO (PCT)
Prior art keywords
display
led
driver
display driver
board
Prior art date
Application number
PCT/CN2023/113599
Other languages
English (en)
French (fr)
Inventor
金锺大
林荣镇
严丞辉
Original Assignee
北京显芯科技有限公司
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Publication of WO2024041448A1 publication Critical patent/WO2024041448A1/zh

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the present application relates to the field of display, and in particular, to a driving system, a display system and a display device.
  • a liquid crystal display device is a device composed of a liquid crystal display panel, a backlight circuit and a display system.
  • the display system drives the liquid crystal display panel to adjust the state of its internal imaging structure based on the video data.
  • it determines the brightness information to be generated in each area of the backlight unit based on the video data, and drives the backlight circuit to generate corresponding bright light.
  • the backlight circuit projects bright light onto the LCD panel to generate a corresponding video image.
  • the existing display system drives the LCD panel and backlight circuit, it not only requires a Light Emitting Diode (LED) controller to drive the LED in the backlight circuit to emit light through an LED driver, but also requires a display driver to drive the LCD panel. This makes the circuit structure and circuit layout corresponding to the display system complex.
  • LED Light Emitting Diode
  • the present application provides a driving system, a display system and a display device to solve the technical problem of complex circuit structure and circuit layout corresponding to the display system.
  • this application provides a driving system, including: a timing controller (Timing Controller, TCON for short) and multiple display drivers, and the timing controller is connected to each display driver respectively;
  • a timing controller Timing Controller, TCON for short
  • TCON Timing Controller
  • Each display driver includes a regional dimming signal generation unit and an LED drive control unit;
  • the timing controller After the timing controller transmits the 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 drive control unit in each display driver generates a corresponding backlight brightness signal according to the first display data packet.
  • the backlight brightness signal generates corresponding multiple LED drive control signals.
  • each display driver includes a plurality of LED drive control terminals, and each LED drive control terminal outputs a corresponding LED drive control signal.
  • the first display data packet includes video data and configuration parameters of each display driver; the display driver determines the processing method of the display driver according to the configuration parameters; the dimming signal generation unit in the display driver generates the corresponding backlight brightness signal according to the video data ; The LED drive control unit in the display driver generates corresponding LED drive signals based on the backlight brightness signal.
  • this application provides a display system, including a main controller, an LCD display screen, a backlight circuit and the drive system involved in the first aspect.
  • the main controller is connected to the timing controller of the drive system, and each LED driver of the display driver The control end is connected to the backlight circuit, and the LCD drive signal output end of the display driver is connected to the LCD display screen.
  • the backlight circuit includes multiple backlight units, and the number of backlight units is the same as the number of display drivers in the driving system.
  • each backlight unit includes multiple groups of cascaded LED drivers, and the number of LED drive control terminals in each display driver is the same as the number of groups of cascaded LED drivers in each backlight unit.
  • the display system also includes a main control board, a timing control board, a source board, at least one flexible display driver board, at least one serial transmission flexible circuit board and a plurality of cables;
  • the timing controller is connected to the timing control board,
  • the main controller is connected to the main control board;
  • the LCD display screen includes multiple LCD drive signal input interfaces; each flexible display drive board is connected to a display driver;
  • the main control board is connected to the timing control board through a cable, and the timing control board is connected to the source board through a cable.
  • the source board is connected to the corresponding cascade LED driver through each serially transmitted flexible circuit board, and the source board is connected to each flexible display driver. board connection, each flexible display driver board is connected to the corresponding LCD drive signal input interface;
  • the number of display drivers is the same as the number of flexible display driver boards and the number of serially transmitted flexible circuit boards.
  • the LED drive control signal output by the LED drive control terminal of each display driver is transmitted to the corresponding cascaded LED driver through the source board and the serially transmitted flexible circuit board.
  • the display system also includes a main control board, a timing control board, at least one flexible display driver board, at least one serial transmission flexible circuit board and a plurality of cables;
  • the timing controller is connected to the timing control board, and the main controller Connected to the main control board;
  • the LCD display screen includes multiple LCD drive signal input interfaces; each flexible display driver board is connected to a display driver;
  • the main control board is connected to the timing control board through a cable.
  • the timing control board is connected to the corresponding cascaded LED driver through each serial transmission flexible circuit board.
  • the timing control board is connected to each flexible display driver board, and each flexible display driver board is connected to Corresponding LCD drive signal input interface connection;
  • the number of display drivers is the same as the number of flexible display driver boards and the number of serially transmitted flexible circuit boards.
  • the LED drive control signals output by the LED drive control terminals of each display driver are transmitted to the corresponding cascaded LED driver through the timing control board and the serially transmitted flexible circuit board.
  • this application provides a driving system, including: a timing controller and multiple display drivers, and the timing controller is connected to each display driver respectively;
  • Each display driver includes an LED drive control unit
  • the timing controller includes a regional dimming signal generation unit
  • the LED drive control unit in each display driver obtains the backlight brightness signal from the second display data packet and generates the corresponding LED drive control signal according to the backlight brightness signal;
  • the second display data includes a backlight brightness signal.
  • the second display data packet also includes video data and configuration parameters of each display driver; the display driver determines the processing method of the display driver according to the configuration parameters; the dimming signal generation unit in the display driver generates the corresponding backlight brightness according to the video data Signal; the LED drive control unit in the display driver generates a corresponding LED drive signal based on the backlight brightness signal.
  • this application provides a display system, including a main controller, an LCD display screen, a backlight circuit and the drive system involved in the second aspect.
  • the main controller is connected to the timing controller of the drive system, and the display driver is connected to the backlight circuit.
  • the display driver is connected to the LCD display.
  • the present application provides a display device, including the display system related to the second aspect or the fourth aspect.
  • the drive system includes: a timing controller and multiple display drivers.
  • the timing controller is connected to each display driver respectively.
  • Each display driver includes a regional dimming signal generation unit and an LED driver.
  • the control unit and the timing controller transmit the 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
  • the LED driver in each display driver The control unit generates corresponding multiple LED drive control signals according to the backlight brightness signal, so that the display driver can also drive the backlight circuit.
  • the display driver replaces the LED driver and related circuit structure that generates LED drive control signals in the existing display system. Reduces the complexity of circuit structure and line layout Complexity.
  • Figure 1 is a schematic diagram of the imaging structure of a liquid crystal display device
  • Figure 2 is a schematic structural diagram of an exemplary traditional display system provided by this application.
  • Figure 3 is a schematic structural diagram of the original display driver provided by this application.
  • Figure 4 is a schematic diagram of the connection relationship between multiple original display drivers and LCD displays provided by this application.
  • Figure 5 is a schematic structural diagram of another exemplary traditional display system provided by this application.
  • Figure 6A is a circuit diagram of an exemplary traditional display system provided by this application.
  • Figure 6B is a circuit diagram of another exemplary traditional display system provided by the present application.
  • Figure 7 is a schematic structural diagram of a display system provided by this application according to an exemplary embodiment
  • Figure 8 is a schematic structural diagram of a regional dimming unit provided by this application according to an exemplary embodiment
  • Figure 9 is a schematic structural diagram of a first display driver provided by the present application according to an exemplary embodiment
  • Figure 10 is a schematic diagram of the connection relationship between multiple display drivers, LCD display screens and backlight circuits provided by the present application according to an exemplary embodiment
  • Figure 11 is a schematic structural diagram of a display system provided by the present application according to another exemplary embodiment.
  • Figure 12A is a circuit diagram of a display system provided by the present application according to an exemplary embodiment
  • Figure 12B is a circuit diagram of a display system provided by the present application according to another exemplary embodiment
  • FIG. 13 is a schematic diagram of the driving process of the first display driver provided by this application according to an exemplary embodiment.
  • a liquid crystal display device is a device that includes a display system, which is composed of a main controller, a driving system, and an imaging unit, where the imaging unit includes a backlight circuit 24 and an LCD display screen 23 .
  • the positional relationship between the backlight circuit 24 and the LCD display screen 23 is shown in Figure 1.
  • the backlight circuit 24 is composed of multiple LEDs 241 or mini-LEDs.
  • the backlight circuit 24 and the LCD display screen 23 are in a corresponding relationship, and the LCD display screen 23 is placed in front of the backlight circuit 24 to provide brightness for the image displayed on the LCD display screen 23 .
  • the driving system drives the liquid crystal display panel to adjust the state of its internal imaging structure based on the video data it obtains. At the same time, it determines the brightness information to be generated in each area of the backlight unit based on the video data, and drives the backlight unit to generate the corresponding The backlight unit projects the bright light onto the LCD panel to generate a corresponding video picture.
  • the positions of each LED 241 in the backlight circuit 24 are different, and each LED 241 is a liquid crystal area of a corresponding area on the LCD display screen 23 A bright light is provided, the brightness of which is adjusted based on the video data displayed at the LCD area.
  • FIG. 2 A schematic structural diagram of a traditional display system is shown in Figure 2, including a main controller 20, a driving system, an LCD display 23 and a backlight circuit 24.
  • the backlight circuit 24 includes a plurality of LEDs 241 and a plurality of LED drivers 242.
  • the driving system includes TCON 21, m original display drivers and LED controller 25.
  • the main controller 20 includes a first area dimming signal generating unit 201.
  • the M original display drivers include: the first original display driver 221, the second original display driver 222, ..., and the m-th original display driver 22m.
  • the main controller 20 is a system-on-chip (SoC) chip or a scaler chip, and the original display driver is an SDIC chip.
  • SoC system-on-chip
  • the main controller 20 is connected to the TCON 21 through the video data transmission line 30.
  • the TCON 21 is connected to each original display driver through a point-to-point data transmission line 31.
  • Each original display driver is connected to the corresponding drive signal input end of the LCD display 23.
  • the main controller 20 is also connected to the LED controller 25 through the SPI data transmission line 32 , and the LED controller 25 is connected to each LED driver 242 in the backlight circuit 24 through the LED driving interface data transmission line 33 .
  • the main controller 20 transmits the video data to the TCON 21, so that the TCON 21 converts the above video data into point-to-point differential signals that can be processed by each original display driver 221, and transmits them in a high-speed serial manner through the point-to-point data transmission line 31
  • the above-mentioned point-to-point differential signal is transmitted, so that each original display driver receives the above-mentioned differential signal and generates a corresponding LCD driving signal according to the signal to drive the corresponding area in the LCD display 23 to adjust the state of the internal imaging structure.
  • the point-to-point differential signal may be transmitted through an ISP interface, a CHPI interface, a USIT interface or a CEDS interface.
  • each original display driver is shown in FIG. 4
  • the structural schematic diagram of the original display driver is shown in FIG. 3
  • the LCD display screen 23 has multiple signal input terminals along the lateral side, where p is the number of input terminals of each original display driver, m is the number of original display drivers, and n is the LCD driving signal output interface 244 of each original display driver.
  • the number of LCD drive signal output terminals in the above-mentioned signal input terminals divides the LCD display screen 23 into m areas along the horizontal direction, and each original display driver drives the corresponding LCD display screen area to display the corresponding picture.
  • the first regional dimming signal generating unit 201 generates the backlight brightness signal of each area in the backlight circuit 24 according to the video data, and outputs the backlight brightness signal from the SPI interface of the main controller 20 and transmits it through the SPI data transmission line 32 to the LED controller 25, the LED controller 25 generates a plurality of control signals, and transmits each control signal to the corresponding LED driver 242 through the LED driver interface data transmission line 33.
  • the LED driver 242 drives the LED 241 connected to it, so that That Corresponding bright light is generated, and the bright light is projected onto the LCD display screen 23 on the front side, so that it displays a picture corresponding to the video data.
  • the LED drivers 242 are in a cascade relationship along the lateral direction of the backlight circuit 24, that is, the LED drivers in the same row are connected in sequence, and the driving signal for the LED 241 around the driver to emit light is obtained from the previous LED driver close to the signal input end.
  • FIG. 5 Another structural schematic diagram of a traditional display system is shown in Figure 5.
  • the unit that generates the backlight brightness signal is no longer integrated in the main controller 20, but integrated In the TCON 21, there is a second regional dimming signal generating unit 211.
  • the TCON 21 and the LED controller 25 are connected through the SPI data transmission line 32, which is used to obtain the backlight brightness generated by the second regional dimming signal generating unit 211 from the TCON 21.
  • the signal is transmitted to the LED controller 25 through the SPI protocol, so that the LED controller 25 generates multiple control signals to drive the corresponding cascaded LED driver 242 to work.
  • the LCD display screen 23 and the backlight circuit 24 in the above two display systems are controlled by different controllers respectively.
  • the circuit structure is complex and the configuration cost is high.
  • the staff needs to perform the display
  • Each unit in the system is debugged separately, which requires a large workload and low debugging efficiency.
  • the circuit diagram includes a main controller 20, a timing controller 21, a main control board 26, a timing control board 27, a source board 28, multiple original display drivers, an LCD display 23, a backlight circuit, and an LED controller. 25 and LED control panel 29.
  • the backlight circuit includes a plurality of backlight units 243. A plurality of backlight units 243 are placed below the LCD display screen 23 .
  • the main controller 20 is placed on the main control board 26, and some or all of the pins of the main controller 20 are connected to the main control board 26.
  • the timing controller 21 is placed on the timing control board 27, and some or all of the pins of the timing controller 21 are Connected to timing control board 27.
  • Each original display driver is connected to the flexible display driver board 38 .
  • the LED controller 25 is placed on the LED control board 29 , and some or all pins of the LED controller 25 are connected to the LED control board 29 .
  • the main control board 26 is connected to the timing control board 27 through a flat cable, and the timing control board 27 is connected to the source board 28 through a flat cable.
  • the source board 28 is connected to one end of each flexible display driving board 38, and the other end of the flexible display driving board 38 is connected to The corresponding LCD driving signal input interface in the LCD display 23 is connected.
  • the main control board 26 is also connected to the LED control board 29 through a flat cable, and the LED control board 29 is also connected to a plurality of backlight units 243 respectively.
  • the circuit structure of Figure 6B uses fewer circuit boards and connections.
  • the circuit structure of Figure 6B removes the source board 28 and the source board 28 and timing control in Figure 6A.
  • the wiring between the boards 27 allows the timing control board 27 to be directly connected to each flexible display driving board 38 .
  • the main controller 20 after obtaining the video data, the main controller 20 generates and transmits the driving signal for driving the backlight circuit and the transmission path of the driving signal for driving the LCD display screen is inconsistent, which may easily lead to the LCD display screen and the LCD display screen.
  • the time at which the backlight circuit obtains the driving signal is inconsistent, and the picture effect generated by the display system is poor.
  • multiple transmission paths lead to high circuit layout complexity.
  • this application provides a driving system, a display system and a display device, aiming to solve the technical problem of high complexity of circuit structure and line layout corresponding to the display system.
  • the technical concept of this application is to integrate the function of the LED controller into the display driver, so that the display system uses the display driver to simultaneously drive the backlight circuit and the LCD display screen for screen display, thereby eliminating the LED controller in the circuit structure. and related wiring to reduce the circuit layout complexity.
  • FIG. 7 is a schematic structural diagram of a display system provided by the present application according to an exemplary embodiment.
  • the display system includes a main controller 20, an LCD display 23, a backlight circuit 24 and a drive system.
  • the drive system includes a TCON 21 and m display drivers. , wherein the m display drivers are respectively: the first display driver 391, the second display driver 392, ..., and the m-th display driver 39m.
  • Each display driver contains a local dimming unit 34.
  • the structure of the regional dimming unit 34 is shown in FIG. 8 , and includes a third regional dimming signal generating unit 35 and an LED drive control unit 36 .
  • the third area dimming signal generating unit 35 is used to generate a backlight brightness signal according to the video data
  • the LED driving control unit 36 generates an LED driving control signal according to the backlight brightness signal.
  • the main controller 20 is connected to the TCON 21 through the video data transmission line 30.
  • the TCON 21 is connected to each display driver respectively.
  • the third regional dimming signal generation unit 35 and the LED drive control unit 36 connect.
  • Each display driver includes multiple LCD drive signal output terminals and multiple LED drive control terminals.
  • Each LCD drive signal output terminal is connected to the LCD display 23
  • the LED drive control terminal of each display driver is connected to the corresponding backlight unit in the backlight circuit 24 , where the number of backlight units is the same as the number of display drivers in the driving system.
  • the LCD display screen 23 is divided into m LCD areas along the lateral direction, and the backlight circuit 24 is also divided into m backlight units 243 along the lateral direction.
  • Each LCD area has a one-to-one correspondence with each backlight unit 243, and one display driver is connected to And drive an LCD area, and connect and drive a backlight unit 243 corresponding to the above-mentioned LCD area.
  • the connection relationship between the LCD display screen 23, the backlight circuit 24 and each display driver is shown in Figure 10.
  • the LCD driving signal output interface 244 of each display driver has n LCD driving signal output terminals, and each output terminal is connected to an LCD area.
  • Each LED driver control The control terminals are connected to one backlight unit 243, and the number of LED drive control terminals in the display driver is the same as the number of groups of cascaded LED drivers in each backlight unit 243.
  • the first display driver 391 has two LED drive control terminals.
  • the backlight unit 243 driven by the first display driver 391 includes two groups of cascaded LED drivers 242.
  • Each group of cascaded LED drivers includes 3 LED drivers, each LED drive control terminal is connected to two groups of cascaded LED drivers 242 in a one-to-one correspondence, and is used to drive the upper and lower rows of LEDs 241 connected to each group of cascaded LED drivers 242 to emit light, wherein each The driving signals of the group cascaded LED drivers are transmitted sequentially from left to right.
  • the backlight brightness signal generated by the first regional dimming signal generating unit 201 and the second regional dimming signal generating unit 211 controls the entire backlight circuit 24 to emit light. signal.
  • the control signal generated by the LED controller 25 is also a control signal for the entire backlight circuit 24.
  • the third regional dimming signal generation unit 35 The generated backlight brightness signal is only for one backlight unit 243 .
  • the control signal generated by the LED drive control unit 36 based on the backlight brightness signal is also a control signal for only the LED driver 242 in one backlight unit 243 .
  • the scale of each regional dimming unit 34 is 1/m of the scale of the LED controller 25 and the first regional dimming signal generating unit 201 shown in FIG. 2, or, The scale of each local dimming unit 34 is 1/m of the scale of the LED controller 25 and the second local dimming signal generating unit 211 shown in FIG. 5 . Therefore, when the local dimming unit 34 is integrated into the original display driver, the scale adjustment of the original display driver is small and the adjustment cost is low.
  • the first display driver 391 comparison is made with the structure of the original display driver shown in FIG. 3 .
  • the schematic structural diagram of the first display driver 391 is shown in FIG. 9 .
  • a regional dimming unit 34 is added to the first display driver 391.
  • an LED drive control interface CLED-D is added to the first display driver 391.
  • the interface includes multiple LED drive control terminals. For outputting serial signals, the first display driver 391 input signal ports lane 1 to lane p, the lock cascade signal input terminal Lin, the lock flag output terminal Lout and the LCD drive signal output terminal 244 all remain unchanged, among which the port lane 1 to lane p are used to receive display packets sent by TCON 21.
  • one LED 241 can provide brightness for multiple pixels in the LCD display 23
  • the two columns of LEDs 241 only need to be driven by a set of cascaded LED drivers 242 placed in the middle of the two columns of LEDs 241, and a set of cascaded LED drivers 242 only needs to connect one LED drive control terminal to obtain the control signal. Therefore, in a display driver, the number of LED drive control terminals is much smaller than the number of LCD drive signal output terminals. Therefore, integrating a regional dimming unit in the display driver is of great benefit to the current situation. Some display drivers have smaller resizing capabilities.
  • Table 1 the relationship between the number of horizontal pixels, the number of vertical pixels, the number of horizontal areas, the number of vertical areas, the number of total areas and the number of LED driver control terminals corresponding to the number of unit display drivers is shown in Table 2:
  • the number of LED drive control terminals of the LED controller 25 is the same as the number of groups of all cascaded LEDs in the backlight circuit 24.
  • the display system proposed in this application includes m display drivers, each display driver The number of set LED driving terminals is only 1/m of the number of driving control terminals of the LED controller 25, which is much smaller than the number of LCD driving signal output terminals. Therefore, the addition of the regional dimming unit to the display driver does not affect the scale of the display driver. , only the number of internal logic circuits and external pins need to be adjusted accordingly, so the production cost of the display driver and the original display driver is the same.
  • the main controller 20 transmits video data and configuration data to the TCON 21.
  • the TCON 21 generates a first display data packet based on the obtained data and transmits the first display data packet to each display driver.
  • the local dimming signal generation unit in the driver generates the corresponding backlight brightness signal according to the first display data packet, and the LED drive control unit in each display driver generates corresponding multiple LED drive control signals according to the backlight brightness signal.
  • the first display data packet includes video data and configuration parameters.
  • the video data is RGB data
  • the structure of the first display data packet is as shown in Table 3:
  • the display driver can directly determine the processing mode of the display driver based on the configuration parameters in the first display data packet, without receiving the configuration parameters from other interfaces, thereby reducing the use of circuit connection lines in the driving system.
  • the dimming signal generation unit in the display driver generates a corresponding backlight brightness signal according to the video data in the first display data
  • the LED drive control unit in the display driver generates a corresponding LED drive signal according to the backlight brightness signal.
  • the display signal processing unit of the display driver converts the video data in the first display data packet into an LCD driving signal.
  • Each display driver outputs an LED drive control signal from its LED drive control terminal to the cascaded LED driver in the corresponding backlight unit to drive the LED connected to the LED driver to emit corresponding bright light.
  • Each display driver outputs the LCD drive signal from the LCD drive signal output terminal to the LCD display screen to drive the LCD display screen to display the corresponding picture.
  • the driving system can still generate driving signals for driving the LCD display and backlight unit based on the remaining devices without using the LED controller, so as to ensure the normal operation of the system on the basis of simplifying the system.
  • the data transmission path is the same, which solves the problem of the drive circuit in the traditional display system generating the drive signal to drive the LCD display and backlight unit. The problem of signal desynchronization when driving signals.
  • FIG 11 is a schematic structural diagram of a display system provided by the present application according to another exemplary embodiment.
  • the display driver only includes the LED drive control unit 36, and the TCON 21 is added A second area dimming signal generating unit 211 is provided.
  • the connection relationships between other components and circuits are the same.
  • the TCON 21 first controls the regional dimming signal generation unit 35 to generate the corresponding backlight brightness signal according to the video data, and then generates the corresponding backlight brightness signal according to the backlight brightness signal, video data and The configuration parameters generate a second display data packet.
  • the LED drive control unit 36 in each display driver obtains the backlight brightness signal from the second display data packet. According to the backlight brightness signal Generate corresponding LED drive control signals.
  • the second display data packet includes the backlight brightness signal, video data and configuration parameters of each display driver.
  • the display driver determines the processing mode of the display driver according to the configuration parameters, and the LED drive control unit 36 in the display driver generates a corresponding LED drive signal according to the backlight brightness signal.
  • the video data is RGB data
  • the structure of the second display data packet is as shown in Table 4 As shown, N, M, and K are all positive integers.
  • the second area dimming signal generation unit 211 in the TCON 21 generates a backlight brightness signal that controls the entire backlight circuit 24 to emit light according to the video data sent by the main controller 20.
  • the TCON 21 is as shown in Figure 11.
  • the TCON 21 in the conventional display system shown in Figure 5 has the same structure and function.
  • each display driver only processes the backlight brightness signal required by one backlight unit and generates the corresponding control signal to control the backlight.
  • the LED driver 242 in the unit drives the associated LED to emit light.
  • the data amount of this control signal is only 1/m of the data amount of the control signal generated by the LED controller 25 in the traditional display system shown in Figure 5.
  • the LED drive control terminals provided by each display driver in Figure 11 are only 1/m of the number of LED drive control terminals of the LED controller 25 in FIG. 5 . Therefore, integrating the LED drive control unit 36 into the display driver will not increase the production cost of the display driver.
  • the drive system can also drive the LDC display and backlight circuit after streamlining the LED controller without changing the connection between the unchanged main controller and TCON. Relationship, using smaller system adjustment costs to reduce the complexity of the circuit layout, therefore, also reduces the production cost of the display system.
  • the simplified circuit structure reduces the workload of debugging personnel and improves the installation efficiency of the display system.
  • each serial transmission flexible circuit board 37 is added to the circuit structure shown in Figure 12A.
  • One end of each serial transmission flexible circuit board 37 is connected to the source board 28, and the other end is connected to the corresponding backlight unit 243.
  • the number of display drivers is the same as the number of flexible display driving boards 38 and the number of serially transmitted flexible circuit boards 37 . Taking the first display driver 391 as an example, the display driver transmits the LED to the corresponding backlight unit 243.
  • the process of driving the control signal is shown in Figure 13.
  • the LED drive control signal output by the LED drive control terminal of the display driver is transmitted to the corresponding cascaded LED driver through the source board and the serially transmitted flexible circuit board 37. Compared with the transmission from the LED control board to the backlight unit through cables in traditional display systems, this process shortens the information transmission path and prevents signal attenuation.
  • FIG. 12B compared to FIG. 6B are the same as the changes in FIG. 12A compared to FIG. 6A , and will not be described again here.
  • the LED drive control signal output by the LED drive control terminal of each display driver is transmitted to the corresponding backlight unit through the timing control board and the serially transmitted flexible circuit board. Cascading LED drivers minimizes the transmission path and prevents signal attenuation.
  • This application provides a display device, including the display system provided by the embodiment corresponding to Figure 7, or the display system provided by the embodiment corresponding to Figure 11.

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Abstract

一种驱动系统、显示系统及显示装置，应用于显示领域，驱动系统包括：时序控制器(21)和多个显示驱动器(391…39m)，时序控制器(21)分别与各显示驱动器(391…39m)连接，各显示驱动器(391…39m)包括区域调光信号生成单元(35)和LED驱动控制单元(36)，时序控制器(21)将第一显示数据包传输至各显示驱动器(391…39m)后，各显示驱动器(391…39m)中的区域调光信号生成单元(35)根据第一显示数据包生成对应的背光亮度信号，各显示驱动器(391…39m)中的LED驱动控制单元(36)根据背光亮度信号生成对应的多个LED驱动控制信号，使得显示驱动器(391…39m)也能驱动背光电路，替代了现有的显示系统中生成LED驱动控制信号的LED驱动器及相关的电路结构，降低了电路结构线路布局的复杂度。

Description

驱动系统、显示系统及显示装置
本申请要求于2022年08月22日提交中国专利局、申请号为202211006953.X、申请名称为“驱动系统、显示系统及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示领域，尤其涉及一种驱动系统、显示系统及显示装置。
背景技术
液晶显示装置是由液晶显示面板、背光电路及显示系统组成的装置。在液晶显示装置成像的过程中，显示系统根据视频数据驱动液晶显示面板调整其内部成像结构的状态，同时根据视频数据确定背光单元各区域待产生的亮度信息，并驱动背光电路生成对应的亮光，背光电路将亮光投射到液晶显示面板后，生成对应的视频画面。
现有的显示系统在驱动液晶显示面板和背光电路时，不仅需要发光二极管(Light Emitting Diode，简称：LED)控制器通过LED驱动器驱动背光电路中的LED发光，还需要显示驱动器驱动液晶显示面板，使得该显示系统对应的电路结构线路布局复杂。
发明内容
本申请提供一种驱动系统、显示系统及显示装置，用以解决显示系统对应的电路结构线路布局复杂的技术问题。
第一方面，本申请提供一种驱动系统，包括：时序控制器(Timing Controller，简称：TCON)和多个显示驱动器，时序控制器分别与各显示驱动器连接；
各显示驱动器包括区域调光信号生成单元和LED驱动控制单元；
时序控制器将第一显示数据包传输至各显示驱动器后，各显示驱动器中的区域调光信号生成单元根据第一显示数据包生成对应的背光亮度信号，各显示驱动器中的LED驱动控制单元根据背光亮度信号生成对应的多个LED驱动控制信号。
在上述技术方案中，通过在各显示驱动器中添加LED驱动信号，替代了现有的显示系统中生成LED驱动控制信号的LED驱动器及相关的电路结构， 降低了电路结构线路布局的复杂度。
可选地，各显示驱动器包括多个LED驱动控制端，各LED驱动控制端输出对应的LED驱动控制信号。
可选地，第一显示数据包包括视频数据和各显示驱动器的配置参数；显示驱动器根据配置参数确定显示驱动器的处理方式；显示驱动器中的调光信号生成单元根据视频数据生成对应的背光亮度信号；显示驱动器中的LED驱动控制单元根据背光亮度信号生成对应的LED驱动信号。
第二方面，本申请提供一种显示系统，包括主控器、LCD显示屏、背光电路和第一方面涉及的驱动系统，主控器与驱动系统的时序控制器连接，显示驱动器的各LED驱动控制端连接背光电路，显示驱动器的LCD驱动信号输出端与LCD显示屏连接。
可选地，背光电路包括多个背光单元，背光单元的个数与驱动系统中显示驱动器的个数相同。
可选地，各背光单元中包括多组级联LED驱动器，各显示驱动器中LED驱动控制端的数量和每个背光单元中的级联LED驱动器的组数相同。
可选地，显示系统还包括主控板、时序控制板、source板、至少一个柔性显示驱动板、至少一个串行传输的柔性电路板和多个排线；时序控制器与时序控制板连接，主控器与主控板连接；LCD显示屏包括多个LCD驱动信号输入接口；各柔性显示驱动板上连接一个显示驱动器；
主控板通过排线与时序控制板连接，时序控制板通过排线和source板连接，source板通过各串行传输的柔性电路板与对应的级联LED驱动器连接，source板与各柔性显示驱动板连接，各柔性显示驱动板与对应的LCD驱动信号输入接口连接；
其中，显示驱动器的数量与柔性显示驱动板的数量相同，也与串行传输的柔性电路板的数量相同。
可选地，各显示驱动器的LED驱动控制端输出的LED驱动控制信号通过source板和串行传输的柔性电路板传输至对应的级联LED驱动器。
可选地，显示系统还包括主控板、时序控制板、至少一个柔性显示驱动板、至少一个串行传输的柔性电路板和多个排线；时序控制器与时序控制板连接，主控器与主控板连接；LCD显示屏包括多个LCD驱动信号输入接口；各柔性显示驱动板上连接一个显示驱动器；
主控板通过排线与时序控制板连接，时序控制板通过各串行传输的柔性电路板与对应的级联LED驱动器连接，时序控制板与各柔性显示驱动板连接，各柔性显示驱动板与对应的LCD驱动信号输入接口连接；
其中，显示驱动器的数量与柔性显示驱动板的数量相同，也与串行传输的柔性电路板的数量相同。
可选地，各显示驱动器的LED驱动控制端输出的LED驱动控制信号通过时序控制板和串行传输的柔性电路板传输至对应的级联LED驱动器。
第三方面，本申请提供一种驱动系统，包括：时序控制器和多个显示驱动器，时序控制器分别与各显示驱动器连接；
各显示驱动器包括LED驱动控制单元；
时序控制器包括区域调光信号生成单元；
时序控制器将第二显示数据包传输至各显示驱动器后，各显示驱动器中的LED驱动控制单元从第二显示数据包中获得背光亮度信号后，根据背光亮度信号生成对应的LED驱动控制信号；第二显示数据包括背光亮度信号。
可选地，第二显示数据包还包括视频数据和各显示驱动器的配置参数；显示驱动器根据配置参数确定显示驱动器的处理方式；显示驱动器中的调光信号生成单元根据视频数据生成对应的背光亮度信号；显示驱动器中的LED驱动控制单元根据背光亮度信号生成对应的LED驱动信号。
第四方面，本申请提供一种显示系统，包括主控器、LCD显示屏、背光电路和第二方面涉及的驱动系统，主控器与驱动系统的时序控制器连接，显示驱动器连接背光电路，显示驱动器与LCD显示屏连接。
第五方面，本申请提供一种显示装置，包括第二方面涉及的，或者第四方面涉及的显示系统。
本申请提供一种驱动系统、显示系统及显示装置，驱动系统包括：时序控制器和多个显示驱动器，时序控制器分别与各显示驱动器连接，各显示驱动器包括区域调光信号生成单元和LED驱动控制单元，时序控制器将第一显示数据包传输至各显示驱动器后，各显示驱动器中的区域调光信号生成单元根据第一显示数据包生成对应的背光亮度信号，各显示驱动器中的LED驱动控制单元根据背光亮度信号生成对应的多个LED驱动控制信号，使得显示驱动器也能驱动背光电路，该显示驱动器替代了现有的显示系统中生成LED驱动控制信号的LED驱动器及相关的电路结构，降低了电路结构线路布局的复 杂度。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
图1为液晶显示装置的成像结构示意图；
图2为本申请提供的一示例性传统显示系统的结构示意图；
图3为本申请提供的原始显示驱动器的结构示意图；
图4为本申请提供的多个原始显示驱动器和LCD显示屏的连接关系示意图；
图5为本申请提供的另一示例性传统显示系统的结构示意图；
图6A为本申请提供的一示例性传统显示系统的电路图；
图6B为本申请提供的另一示例性传统显示系统的电路图；
图7为本申请根据一示例性实施例提供的显示系统的结构示意图；
图8为本申请根据一示例性实施例提供的区域调光单元的结构示意图；
图9为本申请根据一示例性实施例提供的第一显示驱动器的结构示意图；
图10为本申请根据一示例性实施例提供的多个显示驱动器、LCD显示屏及背光电路的连接关系示意图；
图11为本申请根据另一示例性实施例提供的显示系统的结构示意图；
图12A为本申请根据一示例性实施例提供的显示系统的电路图；
图12B为本申请根据另一示例性实施例提供的显示系统的电路图；
图13为本申请根据一示例性实施例提供的第一显示驱动器的驱动过程示意图。
通过上述附图，已示出本申请明确的实施例，后文中将有更详细的描述。这些附图和文字描述并不是为了通过任何方式限制本申请构思的范围，而是通过参考特定实施例为本领域技术人员说明本申请的概念。
附图标记：
20：主控器；21：TCON；221：第一原始显示驱动器；222：第二原
始显示驱动器；22m：第m原始显示驱动器；23：液晶显示屏(LCD Panel，简称：LCD显示屏)；24：背光电路；25：LED控制器；26：主控板；27：时序控制板；28：source板；29：LED控制板；
201：第一区域调光信号生成单元；211：第二区域调光信号生成单元；
30：视频数据传输线；31：点对点数据传输线；32：串行外设接口(Serial 
to Parallel Interface，简称：SPI)数据传输线；33：LED驱动接口数据传输线；34：区域调光单元；35：第三区域调光信号生成单元；36：LED驱动控制单元；37：串行传输的柔性电路板；38：柔性显示驱动板；391：第一显示驱动器；392：第二显示驱动器；39m：第m显示驱动器；
241：LED；242：LED驱动器；243：背光单元；244：LCD驱动信号
输出接口；CLED-D：LED驱动控制接口。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本申请相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本申请的一些方面相一致的装置和方法的例子。
液晶显示装置是包含显示系统的装置，该显示系统由主控器、驱动系统和成像单元组成，其中，成像单元包括背光电路24和LCD显示屏23。该背光电路24和LCD显示屏23的位置关系如图1所示，在图1中，背光电路24是由多个LED 241或mini-LED构成。背光电路24和LCD显示屏23的呈对应关系，且LCD显示屏23置于背光电路24的前侧，为LCD显示屏23显示的图像提供亮度。
在液晶显示装置成像的过程中，驱动系统根据其获得的视频数据驱动液晶显示面板调整其内部成像结构的状态，同时根据视频数据确定背光单元各区域待产生的亮度信息，并驱动背光单元生成对应的亮光，背光单元将亮光投射到液晶显示面板后，生成对应的视频画面。其中，各LED 241在背光电路24的位置各不相同，各LED 241为LCD显示屏23上对应区域的液晶区域 提供亮光，该亮光的亮度是根据液晶区域处显示的视频数据调整的。
传统的显示系统的一种结构示意图如图2所示，包括主控器20、驱动系统、LCD显示屏23和背光电路24。背光电路24包括多个LED 241和多个LED驱动器242。驱动系统包括TCON 21、m个原始显示驱动器和LED控制器25。主控器20包括第一区域调光信号生成单元201。M个原始显示驱动器包括：第一原始显示驱动器221、第二原始显示驱动器222、……、第m原始显示驱动器22m。在一实施例中，主控器20为系统级(System on Chip，简称：SoC)芯片或scaler芯片，原始显示驱动器为SDIC芯片。
主控器20通过视频数据传输线30与TCON 21连接，TCON 21通过点对点数据传输线31与各原始显示驱动器连接，各原始显示驱动器与LCD显示屏23对应的驱动信号输入端连接。主控器20还通过SPI数据传输线32与LED控制器25连接，LED控制器25通过LED驱动接口数据传输线33与背光电路24中的各LED驱动器242连接。
主控器20一方面将视频数据传输至TCON 21，以使TCON 21将上述视频数据转化为各原始显示驱动器221可处理的点对点差动信号，并通过点对点数据传输线31以高速串行传输的方式对上述点对点差动信号进行传输，以使各原始显示驱动器接收到上述差动信号后，根据该信号生成对应的LCD驱动信号，以驱动LCD显示屏23中对应区域调整内部成像结构的状态。在一实施例中，点对点差动信号可用过ISP接口、CHPI接口、USIT接口或CEDS接口传输。
更具体地，各原始显示驱动器和LCD显示屏23的连接关系如图4所示，原始显示驱动器的结构示意图如图3所示。LCD显示屏23沿横向侧有多个信号输入端，其中，p为各原始显示驱动器的输入端的个数，m为原始显示驱动器的个数，n为各原始显示驱动器的LCD驱动信号输出接口244中LCD驱动信号输出端的个数，上述信号输入端将LCD显示屏23沿横向分成m块区域，每个原始显示驱动器驱动对应的LCD显示屏区域显示对应的画面。
另一方面，第一区域调光信号生成单元201根据视频数据生成背光电路24中各区域的背光亮度信号，并将该背光亮度信号从主控器20的SPI接口输出，通过SPI数据传输线32传输至LED控制器25，LED控制器25生成多个控制信号，并将各控制信号通过LED驱动接口数据传输线33传输至对应的LED驱动器242，LED驱动器242对与其连接的LED 241进行驱动，以使其 产生对应的亮光，并将该亮光投射至前侧的LCD显示屏23上，以使其显示出视频数据对应的画面。其中，LED驱动器242沿背光电路24的横向呈级联关系，即处于同一行的LED驱动器顺次连接，其驱动器周围LED 241发光的驱动信号是从靠近信号输入端的上一LED驱动器处获得的。
相似地，传统的显示系统的另一种结构示意图如图5所示，其与图2所示的结构示意图相比，产生背光亮度信号的单元不再集成在主控器20内，而是集成在TCON 21中，为第二区域调光信号生成单元211，TCON 21与LED控制器25通过SPI数据传输线32连接，用于从TCON 21中将第二区域调光信号生成单元211生成的背光亮度信号通过SPI协议传输至LED控制器25，以使LED控制器25产生多个控制信号以驱动对应的级联的LED驱动器242工作。
上述两种显示系统中的LCD显示屏23和背光电路24是由不同的控制器分别控制的，存在电路结构复杂的情况，配置成本也高，该显示系统在应用过程中，需要工作人员对显示系统中各单元分别调试，工作量大，调试效率低。
上述两种显示系统在具体的电路连接关系上如图6A和图6B所示。在图6A中，该电路图中包括主控器20、时序控制器21、主控板26、时序控制板27、source板28、多个原始显示驱动器、LCD显示屏23、背光电路、LED控制器25和LED控制板29。背光电路中包括多个背光单元243。多个背光单元243置于LCD显示屏23的下方。
主控器20置于主控板26，主控器20的部分或全部引脚与主控板26连接，时序控制器21置于时序控制板27上，时序控制器21的部分或全部引脚与时序控制板27连接。各原始显示驱动器连接于柔性显示驱动板38上。LED控制器25置于LED控制板29上，LED控制器25的部分或全部引脚与LED控制板29连接。主控板26通过排线与时序控制板27连接，时序控制板27通过排线与source板28连接，source板28与各柔性显示驱动板38的一端连接，柔性显示驱动板38的另一端与LCD显示屏23中对应的LCD驱动信号输入接口连接。主控板26还通过排线与LED控制板29连接，LED控制板29还与多个背光单元243分别连接。
相较于图6A的电路结构，图6B的电路结构采用更少的电路板和连线，图6B中的电路结构去掉了图6A中的source板28及source板28与时序控制 板27之间的排线，使得时序控制板27可直接与各柔性显示驱动板38连接。
但是上述两种电路结构中，主控器20在获得视频数据后，生成并传输用于驱动背光电路的驱动信号和用于驱动LCD显示屏的驱动信号的传输路径不一致，易导致LCD显示屏和背光电路获得驱动信号的时间不一致，显示系统生成的画面效果差。此外，多个传输路径导致电路布局的复杂度高。
针对上述技术问题，本申请提供一种驱动系统、显示系统及显示装置，旨在解决显示系统对应的电路结构线路布局复杂度高的技术问题。本申请的技术构思是：通过将LED控制器的功能集成在显示驱动器中，以使显示系统利用显示驱动器同时驱动背光电路和LCD显示屏来进行画面显示，从而削减掉电路结构中的LED控制器及相关的排线，降低电路的布局复杂度。
下面对本申请提供的两种显示系统进行解释。
图7为本申请根据一示例性实施例提供的显示系统的结构示意图，该显示系统包括主控器20、LCD显示屏23、背光电路24和驱动系统，驱动系统包括TCON 21和m个显示驱动器，其中，m个显示驱动器分别为：第一显示驱动器391、第二显示驱动器392、……、第m显示驱动器39m。每个显示驱动器中包含一个区域调光单元34。该区域调光单元34的结构如图8所示，包括第三区域调光信号生成单元35和LED驱动控制单元36。其中，第三区域调光信号生成单元35用于根据视频数据生成背光亮度信号，LED驱动控制单元36根据背光亮度信号生成LED驱动控制信号。
主控器20通过视频数据传输线30与TCON 21连接，TCON 21分别与各显示驱动器连接，各显示驱动器内的区域调光单元34中，第三区域调光信号生成单元35与LED驱动控制单元36连接。各显示驱动器包括多个LCD驱动信号输出端和多个LED驱动控制端，各LCD驱动信号输出端与LCD显示屏23连接，各显示驱动器的LED驱动控制端与背光电路24中对应的背光单元连接，其中，背光单元的个数与驱动系统中显示驱动器的个数相同。
更具体地，LCD显示屏23沿横向分为m个LCD区域，背光电路24沿横向也分为m个背光单元243，各LCD区域与各背光单元243呈一一对应的关系，一个显示驱动器连接并驱动一个LCD区域，且连接并驱动一个与上述LCD区域对应的背光单元243。LCD显示屏23、背光电路24和各显示驱动器的连接关系如图10所示，各显示驱动器的LCD驱动信号输出接口244有n个LCD驱动信号输出端，各输出端连接于一个LCD区域中，各LED驱动控 制端连接于一个背光单元243，且显示驱动器中LED驱动控制端的数量和每个背光单元243中的级联LED驱动器的组数相同。如图10所示，第一显示驱动器391有两个LED驱动控制端，第一显示驱动器391对应驱动的背光单元243中包括两组级联的LED驱动器242，每组级联的LED驱动器中包含3个LED驱动器，每个LED驱动控制端与两组级联的LED驱动器242一一对应地连接，用于驱动与每组级联的LED驱动器242连接的上下两排LED 241发光，其中，每组级联的LED驱动器的驱动信号从左至右顺次传输。值得注意的是，图2和图5所示的传统显示系统中，第一区域调光信号生成单元201和第二区域调光信号生成单元211生成的背光亮度信号是控制整个背光电路24发光的信号，LED控制器25生成的控制信号也是对整个背光电路24的控制信号，而本申请提出的显示系统中，各显示驱动器内的区域调光单元34中，第三区域调光信号生成单元35生成的背光亮度信号仅是针对一个背光单元243的背光亮度信号，相对地，LED驱动控制单元36根据背光亮度信号生成的控制信号也是仅对一个背光单元243中的LED驱动器242的控制信号。因此，当显示系统中有m个显示驱动器时，各区域调光单元34的规模为图2所示的LED控制器25和第一区域调光信号生成单元201的规模的1/m，或者，各区域调光单元34的规模为图5所示的LED控制器25和第二区域调光信号生成单元211的规模的1/m。因此，将区域调光单元34集成进原始显示驱动器中时，对原始显示驱动器的规模大小调整较小，调整成本低。
更具体地，以第一显示驱动器391为例，与图3所示的原始显示驱动器的结构进行比较。第一显示驱动器391的结构示意图如图9所示。相对于原始显示驱动器的结构，第一显示驱动器391中添加了区域调光单元34，相对地，第一显示驱动器391添加了LED驱动控制接口CLED-D，该接口包括多个LED驱动控制端，用于输出串行信号，第一显示驱动器391输入信号的端口lane 1至lane p、锁定级联信号输入端Lin、锁定标志输出端Lout和LCD驱动信号输出端244均保持不变，其中端口lane 1至lane p用于接收TCON 21发送的显示数据包。由于一个LED 241能为LCD显示屏23中的多个像素点提供亮度，而两列LED 241仅需要置于两列LED 241中间的一组级联LED驱动器242驱动，而一组级联LED驱动器242仅需要连接一个LED驱动控制端以获得控制信号，因此，一个显示驱动器中，LED驱动控制端的数量远小于LCD驱动信号输出端的数量，因此，在显示驱动器中集成区域调光单元对现 有的显示驱动器的规模大小调整较小。
例如：在一个显示系统中，采用不同级别分辨率，显示驱动器数量、横向像素点数量、纵向像素点数量、横向区域数量、纵向区域数量、总区域数量及LED驱动控制端数量的关系如表1所示：
表1
根据表1得到单位显示驱动器数量对应的横向像素点数量、纵向像素点数量、横向区域数量、纵向区域数量、总区域数量及LED驱动控制端数量的关系如表2所示：
表2
在传统的显示系统中，LED控制器25的LED驱动控制端的数量与背光电路24中所有级联LED的组数相同，而本申请提出的显示系统中，包含m个显示驱动器，每个显示驱动器设置的LED驱动端的数量仅为LED控制器25的驱动控制端的数量的1/m，远小于LCD驱动信号输出端的数量，因此，区域调光单元在显示驱动器中的添加不影响显示驱动器的规模大小，仅需要对内部逻辑电路和外接引脚的数量进行对应调整，因此显示驱动器和原始显示驱动器的生产成本相同。
在显示系统运行过程中，主控器20将视频数据和配置数据传输至TCON21，TCON 21根据获得的数据生成第一显示数据包，并将该第一显示数据包传输至各显示驱动器，各显示驱动器中的区域调光信号生成单元根据第一显示数据包生成对应的背光亮度信号，各显示驱动器中的LED驱动控制单元根据背光亮度信号生成对应的多个LED驱动控制信号。
更具体地，该第一显示数据包包括视频数据和配置参数。在一实施例中，视频数据为RGB数据，则第一显示数据包的结构如表3所示：
表3
显示驱动器可直接根据第一显示数据包中的配置参数确定显示驱动器的处理方式，而不再需要从其他接口接收该配置参数，减少了驱动系统中电路连接线的使用。显示驱动器中的调光信号生成单元根据第一显示数据中的视频数据生成对应的背光亮度信号，显示驱动器中的LED驱动控制单元根据背光亮度信号生成对应的LED驱动信号。此外，各显示驱动器获得第一显示数据包后，显示驱动器的显示信号处理单元将第一显示数据包中的视频数据转化为LCD驱动信号。
各显示驱动器将LED驱动控制信号从其LED驱动控制端输出至对应的背光单元中的级联LED驱动器，以驱动与LED驱动器连接的LED发出对应的亮光。各显示驱动器将LCD驱动信号从LCD驱动信号输出端输出至LCD显示屏，以驱动LCD显示屏显示对应的画面。
在上述运行过程中，驱动系统在未利用LED控制器的情况下，仍能根据剩余器件生成驱动LCD显示屏和背光单元的驱动信号，以实现在简化系统的基础上仍能保障系统正常运行，此外，从驱动系统获得视频数据和配置参数到生成驱动LCD显示屏和背光单元的驱动信号过程中，数据的传输路径相同，解决了传统显示系统中驱动电路在生成驱动LCD显示屏和背光单元的驱动信号时信号不同步的问题。
图11为本申请根据另一示例性实施例提供的显示系统的结构示意图，与图7相比，图11所示的驱动系统中，显示驱动器内仅包括LED驱动控制单元36，TCON 21中增加了第二区域调光信号生成单元211。其他器件和电路连接关系相同。主控器20将视频数据和各显示驱动器的配置参数传输至TCON 21后，TCON 21先控制区域调光信号生成单元35根据视频数据生成对应的背光亮度信号，再根据背光亮度信号、视频数据和配置参数生成第二显示数据包，TCON 21将第二显示数据包传输至各显示驱动器后，各显示驱动器中的LED驱动控制单元36从第二显示数据包中获得背光亮度信号，根据背光亮度信号生成对应的LED驱动控制信号。
更具体地，第二显示数据包中包括背光亮度信号、视频数据和各显示驱动器的配置参数。显示驱动器在接收到第二显示数据之后，根据配置参数确定显示驱动器的处理方式，显示驱动器中的LED驱动控制单元36根据背光亮度信号生成对应的LED驱动信号。
在一实施例中，视频数据为RGB数据，则第二显示数据包的结构如表4 所示，其中N、M、K均为正整数。
表4
图11所示的驱动系统运行过程中，TCON 21中的第二区域调光信号生成单元211根据主控器20发送的视频数据生成控制整个背光电路24发光的背光亮度信号，该TCON 21与图5所示的传统显示系统中的TCON 21的结构和功能相同。此外，图11所示的驱动系统中，TCON 21将背光亮度信号发送至各显示驱动器后，各显示驱动器仅处理一个背光单元所需的背光亮度信号，并生成对应的控制信号，以控制该背光单元中LED驱动器242驱动关联的LED发光。该控制信号的数据量仅为图5所示的传统显示系统中LED控制器25生成的控制信号的数据量的1/m，相对地，图11中各显示驱动器设置的LED驱动控制端仅为图5中LED控制器25的LED驱动控制端的数量的1/m，因此，将LED驱动控制单元36集成于显示驱动器中，不会增加显示驱动器的生产成本。
图11所示的显示驱动器驱动LCD显示屏和背光单元的过程与图7所示的显示系统中的驱动过程相同，此处不再赘述。
在图11所示的显示系统中，该驱动系统也能实现在精简掉LED控制器之后仍能驱动LDC显示屏和背光电路工作，且不改变未发生变化的主控器和TCON之间的连接关系，采用较小的系统调整成本来降低了电路布局的复杂度，因此，也降低了显示系统的生产成本。此外，简化的电路结构降低了调试人员的工作量，提高了显示系统的安装效率。
图7和图11对应的显示系统可应用于以下两种电路结构，具体地，如图12A和图12B所示。
图12A相较于图6A，减少了LED控制器25、LED控制板29以及与LED控制板29连接的所有排线。在此基础上，图12A所示的电路结构中增加了至少一个串行传输的柔性电路板37，各串行传输的柔性电路板37的一端连接source板28，另一端连接对应的背光单元243。其中，显示驱动器的数量与柔性显示驱动板38的数量相同，也与串行传输的柔性电路板37的数量相同。以第一显示驱动器391为例，描述显示驱动器向对应的背光单元243传输LED 驱动控制信号的过程，该过程如图13所示，显示驱动器的LED驱动控制端输出的LED驱动控制信号通过source板和串行传输的柔性电路板37传输至对应的级联LED驱动器。该过程相较于传统显示系统中从LED控制板通过排线传输至背光单元，缩短了信息传输的路径，防止信号衰减。
图12B相较于图6B的变化情况和图12A相较于图6A的变化情况相同，此处不再赘述。在图12B中，各显示驱动器向对应的背光单元传输LED驱动控制信号时，各显示驱动器的LED驱动控制端输出的LED驱动控制信号通过时序控制板和串行传输的柔性电路板传输至对应的级联LED驱动器，实现传输路径最小化，防止信号衰减。
在上述两种电路结构中，不仅减少了单独的电路板和芯片，还减少了电路中的排线数量，从而降低了显示系统的电路结构线路布局的复杂程度，此外，电路结构中已经存在的电路板和芯片均不发生替换操作，降低了电路的配置成本。
本申请提供一种显示装置，包括图7对应的实施例提供的显示系统，或者图11对应的实施例提供的显示系统。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本申请的其它实施方案。本申请旨在涵盖本申请的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本申请的一般性原理并包括本申请未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本申请的真正范围和精神由下面的权利要求书指出。
应当理解的是，本申请并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本申请的范围仅由所附的权利要求书来限制。

Claims (14)

  1. 一种驱动系统，其特征在于，包括：时序控制器和多个显示驱动器，所述时序控制器分别与各所述显示驱动器连接；
    各所述显示驱动器包括区域调光信号生成单元和LED驱动控制单元；
    所述时序控制器将第一显示数据包传输至各所述显示驱动器后，各所述显示驱动器中的所述区域调光信号生成单元根据所述第一显示数据包生成对应的背光亮度信号，各所述显示驱动器中的所述LED驱动控制单元根据所述背光亮度信号生成对应的多个LED驱动控制信号。
  2. 根据权利要求1所述的驱动系统，其特征在于，各所述显示驱动器包括多个LED驱动控制端，各所述LED驱动控制端输出对应的所述LED驱动控制信号。
  3. 根据权利要求1所述的驱动系统，其特征在于，所述第一显示数据包包括视频数据和各所述显示驱动器的配置参数；所述显示驱动器根据所述配置参数确定所述显示驱动器的处理方式；所述显示驱动器中的所述调光信号生成单元根据所述视频数据生成对应的背光亮度信号；所述显示驱动器中的所述LED驱动控制单元根据所述背光亮度信号生成对应的LED驱动信号。
  4. 一种显示系统，其特征在于，包括主控器、LCD显示屏、背光电路和如权利要求1至3中任意一项所述的驱动系统，所述主控器与所述驱动系统的时序控制器连接，所述显示驱动器的各LED驱动控制端连接所述背光电路，所述显示驱动器的LCD驱动信号输出端与所述LCD显示屏连接。
  5. 根据权利要求4所述的显示系统，其特征在于，所述背光电路包括多个背光单元，所述背光单元的个数与所述驱动系统中所述显示驱动器的个数相同。
  6. 根据权利要求5所述的显示系统，其特征在于，各所述背光单元中包括多组级联LED驱动器，各所述显示驱动器中LED驱动控制端的数量和每个背光单元中的所述级联LED驱动器的组数相同。
  7. 根据权利要求4所述的显示系统，其特征在于，所述显示系统还包括主控板、时序控制板、source板、至少一个柔性显示驱动板、至少一个串行传输的柔性电路板和多个排线；所述时序控制器与所述时序控制板连接，所述主控器与所述主控板连接；所述LCD显示屏包括多个LCD驱动信号输入接 口；各所述柔性显示驱动板上连接一个所述显示驱动器；
    所述主控板通过所述排线与所述时序控制板连接，所述时序控制板通过所述排线和所述source板连接，所述source板通过各所述串行传输的柔性电路板与对应的级联LED驱动器连接，所述source板与各所述柔性显示驱动板连接，各所述柔性显示驱动板与对应的所述LCD驱动信号输入接口连接；
    其中，所述显示驱动器的数量与所述柔性显示驱动板的数量相同，也与所述串行传输的柔性电路板的数量相同。
  8. 根据权利要求7所述的显示系统，其特征在于，各所述显示驱动器的LED驱动控制端输出的LED驱动控制信号通过所述source板和所述串行传输的柔性电路板传输至对应的级联LED驱动器。
  9. 根据权利要求4所述的显示系统，其特征在于，所述显示系统还包括主控板、时序控制板、至少一个柔性显示驱动板、至少一个串行传输的柔性电路板和多个排线；所述时序控制器与所述时序控制板连接，所述主控器与所述主控板连接；所述LCD显示屏包括多个LCD驱动信号输入接口；各所述柔性显示驱动板上连接一个所述显示驱动器；
    所述主控板通过所述排线与所述时序控制板连接，所述时序控制板通过各所述串行传输的柔性电路板与对应的级联LED驱动器连接，所述时序控制板与各所述柔性显示驱动板连接，各所述柔性显示驱动板与对应的所述LCD驱动信号输入接口连接；
    其中，所述显示驱动器的数量与所述柔性显示驱动板的数量相同，也与所述串行传输的柔性电路板的数量相同。
  10. 根据权利要求9所述的显示系统，其特征在于，各所述显示驱动器的LED驱动控制端输出的LED驱动控制信号通过所述时序控制板和所述串行传输的柔性电路板传输至对应的级联LED驱动器。
  11. 一种驱动系统，其特征在于，包括：时序控制器和多个显示驱动器，所述时序控制器分别与各所述显示驱动器连接；
    各所述显示驱动器包括LED驱动控制单元；
    所述时序控制器包括区域调光信号生成单元；
    所述时序控制器将第二显示数据包传输至各所述显示驱动器后，各所述显示驱动器中的所述LED驱动控制单元从所述第二显示数据包中获得背光亮度信号后，根据所述背光亮度信号生成对应的LED驱动控制信号；所述第二 显示数据包括所述背光亮度信号。
  12. 根据权利要求11所述的驱动系统，其特征在于，所述第二显示数据包还包括视频数据和各所述显示驱动器的配置参数；所述显示驱动器根据所述配置参数确定所述显示驱动器的处理方式；所述显示驱动器中的所述调光信号生成单元根据所述视频数据生成对应的背光亮度信号；所述显示驱动器中的所述LED驱动控制单元根据所述背光亮度信号生成对应的LED驱动信号。
  13. 一种显示系统，其特征在于，包括主控器、LCD显示屏、背光电路和如权利要求11或12所述的驱动系统，所述主控器与所述驱动系统的时序控制器连接，所述显示驱动器连接所述背光电路，所述显示驱动器与所述LCD显示屏连接。
  14. 一种显示装置，其特征在于，包括如权利要求4至10中任意一项，或者如权利要求13所述的显示系统。
PCT/CN2023/113599 2022-08-22 2023-08-17 驱动系统、显示系统及显示装置 WO2024041448A1 (zh)

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