CN115394267A - Display system - Google Patents

Display system Download PDF

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Publication number
CN115394267A
CN115394267A CN202211167541.4A CN202211167541A CN115394267A CN 115394267 A CN115394267 A CN 115394267A CN 202211167541 A CN202211167541 A CN 202211167541A CN 115394267 A CN115394267 A CN 115394267A
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China
Prior art keywords
display
led
control signal
lcd
driver
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Granted
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CN202211167541.4A
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Chinese (zh)
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CN115394267B (en
Inventor
任虎男
林荣镇
严丞辉
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Beijing Xianxin Technology Co ltd
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Beijing Xianxin Technology Co ltd
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Priority to CN202211167541.4A priority Critical patent/CN115394267B/en
Publication of CN115394267A publication Critical patent/CN115394267A/en
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Publication of CN115394267B publication Critical patent/CN115394267B/en
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    • 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
    • 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The application provides a display system, be applied to the display field, in the display system, the time schedule controller is connected with each display driver respectively, each display driver is connected with the LCD display screen, each display driver is connected with backlight circuit through first connection structure, the time schedule controller is after receiving display data and control signal, according to control signal and display data generation and to each display driver transmission backlight luminance signal and control data, each display driver is according to backlight luminance signal and control data generation LED drive control signal, the function of part chip in traditional display system has been replaced, thereby reduce the quantity of the device that adopts in the display system, reduce display system circuit structure circuit layout complexity and development cost, in addition, the display driver is connected with backlight circuit through first connection structure, increase its flexibility of being connected with backlight circuit, so that it selects different connected modes according to different application scenes, thereby increase the flexibility of system development.

Description

Display system
Technical Field
The present application relates to the field of display, and more particularly, to a display system.
Background
The display system is a system composed of a liquid crystal display panel, a backlight circuit and a display driving system, and the liquid crystal display panel and the backlight circuit can display corresponding images or videos under the driving of the display driving system.
In the prior art, a display driving system includes a conventional timing control board, a Light Emitting Diode (LED) controller, a timing controller, and a display driver, and a backlight circuit includes an LED driver, and when the display driving system drives a liquid crystal display panel and the backlight circuit to display information obtained by the liquid crystal display panel and the backlight circuit, a main controller is required to transmit an LED driving control signal to the LED driver through the LED controller, so that the LED driver drives an LED in the backlight circuit to emit Light according to a backlight brightness signal, and the main controller is required to drive the liquid crystal display panel through the display driver, so that a circuit structure corresponding to the display system has a complicated circuit layout.
In addition, when the master controller is connected to the LED controller, a corresponding Serial Peripheral Interface (SPI for short) needs to be set, and when a control method of the backlight circuit is changed, the LED controller needs to adjust an LED driving control signal transmitted to the backlight circuit, and correspondingly, a backlight brightness signal transmitted by the master controller to the LED driver and used for generating the LED driving control signal is also adjusted correspondingly.
Disclosure of Invention
The application provides a display system, which is used for solving the technical problems that the circuit structure circuit layout corresponding to the display system is complex, the display system is not flexible to develop and the cost is high.
In a first aspect, the present application provides a display system comprising: the display device comprises a time sequence controller, a plurality of display drivers, an LCD display screen and a backlight circuit, wherein the backlight circuit is provided with a first connecting structure;
the time schedule controller generates a backlight brightness signal and control data according to the control signal and the display data after receiving the display data and the control signal;
the time sequence controller transmits the backlight brightness signal and the control data to each display driver;
and each display driver generates an LED driving control signal according to the backlight brightness signal and the control data, and transmits the LED driving control signal to the backlight circuit through the first connecting structure.
In the above technical solution, the display system does not need the main controller to generate and transmit the backlight brightness signal through the SPI interface according to the display data, and the function is integrated into the first timing controller, so that the circuit structure related to the SPI interface in the main controller does not need to be adjusted in the display system development process, and then the first display driver integrates the local backlight controller into the first display driver, which generates the LED driving control signal according to the backlight brightness signal, thereby reducing the number of devices used in the display system, simplifying the circuit connection relationship, and reducing the circuit structure circuit layout complexity and development cost of the display system.
Optionally, each of the display drivers includes an LCD driving signal output terminal and an LED control signal output terminal, and the backlight circuit includes a plurality of sets of cascaded LED drivers and a plurality of first connection structures;
the LCD driving signal output end is connected with the driving signal input end of the LCD display screen, the LED control signal output end is connected with the corresponding first connecting structure, and the first connecting structure is connected with the input end of the corresponding cascade LED driver;
the number of the LED control signal output ends is the same as the number of the groups of the cascade LED drivers, and the number of the first connecting structures is equal to the number of the groups of the cascade LED drivers.
Optionally, the display system further includes a timing control board, and a plurality of second connection structures are arranged on the timing control board;
the LED control signal output end is connected with the corresponding second connecting structure, and each second connecting structure is connected with the corresponding first connecting structure through a flexible circuit board in flat cable or serial transmission;
the number of the second connecting structures is equal to the number of the first connecting structures.
Optionally, when the display driver includes a plurality of the LED control signal output terminals, one LED control signal output terminal of the display driver is connected to one of the second connection structures.
Optionally, a plurality of third connection structures are arranged on the LCD display screen, the LED control signal output end is connected with the corresponding third connection structure, and each third connection structure is connected with the corresponding first connection structure through a serial transmission flexible circuit board.
Optionally, the display system further comprises a timing control board and a plurality of flexible display driving boards; the LCD display screen comprises a plurality of first connecting areas;
the time sequence controller is connected with the time sequence control board, and each flexible display driving board is connected with one display driver; the time sequence controller is connected with the flexible display driving boards, and the flexible display driving boards are connected with the corresponding first connecting areas;
and each display driver transmits the LCD driving signal generated by the display driver to the LCD display screen through the corresponding first connecting area.
Optionally, the display system further comprises a timing control board and a plurality of flexible display driving boards; a plurality of second connecting areas are arranged on the LCD display screen;
the time sequence controller is connected with the time sequence control board, the time sequence control board is connected with the flexible display drive boards, the flexible display drive boards are connected with the corresponding display drivers, and the display drivers are connected with the corresponding second connection areas;
and each display driver transmits the LCD driving signal generated by the display driver to the LCD display screen through the corresponding second connecting area.
In the above technical solution, the integration level of the control board and the chip in the circuit structure is adjusted by setting the position and the type of the first connection point or the third connection point in the display system, thereby increasing the diversity of the application scenarios applicable to the display system, and meanwhile, compared with the circuit structure of the conventional display system, the circuit structure corresponding to the display system not only reduces the number of independent circuit boards and chips, but also reduces the number of cables in the circuit, thereby reducing the complexity of the circuit structure circuit layout of the display system, in addition, the circuit board and the chip which exist in the circuit structure do not have replacement operation, and the configuration cost of the circuit is reduced.
In a second aspect, the present application provides a display system comprising: the display device comprises a time sequence controller, a plurality of display drivers, an LCD display screen and a backlight circuit, wherein the backlight circuit is provided with a first connecting structure;
the time schedule controller transmits the display data and the control signal to each display driver after receiving the display data and the control signal;
and the display driver generates an LED driving control signal according to the control signal and the display data, and transmits the LED driving control signal to the backlight circuit through the first connecting structure.
Optionally, each of the display drivers includes an LCD driving signal output terminal and an LED control signal output terminal, and the backlight circuit includes a plurality of sets of cascaded LED drivers and a plurality of first connection structures;
the LCD driving signal output end is connected with the driving signal input end of the LCD display screen, the LED control signal output end is connected with the corresponding first connecting structure, and the first connecting structure is connected with the input end of the corresponding cascade LED driver; the number of the LED control signal output ends is the same as the number of the groups of the cascade LED drivers, and the number of the first connecting structures is equal to the number of the groups of the cascade LED drivers.
Optionally, the display system further comprises a timing control board;
the time sequence control board is provided with a plurality of second connecting structures, and the backlight circuit is provided with a plurality of first connecting structures; the LED control signal output end is connected with the corresponding second connecting structure, and each second connecting structure is connected with the corresponding first connecting structure through a flexible circuit board in flat cable or serial transmission; the number of the second connecting structures is equal to the number of the first connecting structures, and the number of the first connecting structures is equal to the number of the groups of the cascaded LED drivers;
or
The LCD display screen is provided with a plurality of third connecting structures, the LED control signal output end is connected with the corresponding third connecting structure, and each third connecting structure is connected with the corresponding first connecting structure through a flexible circuit board in serial transmission.
In the above technical solution, the display system integrates both the function of generating the backlight brightness signal by the main controller and the function of generating the LED driving control signal by the local backlight controller in the conventional display system into the display driver, so that the display system can still normally operate after simplifying the related control panel, the controller and the SPI interface, the complexity and the cost of the circuit layout of the circuit structure are reduced, in addition, the display system is connected with the first connection structure by the second connection structure or the third connection structure, the flexibility of the circuit connection is increased, the diversity of the application scenarios of the display system proposed by the present application is enlarged, and thus the development flexibility of the display system is promoted.
The application provides a display system, the display system includes: the display system comprises a time schedule controller, a plurality of display drivers, an LCD display screen and a backlight circuit, wherein the backlight circuit is provided with a first connecting structure, the time schedule controller is respectively connected with each display driver, each display driver is connected with the LCD display screen, each display driver is connected with the backlight circuit through the first connecting structure, the time schedule controller generates backlight brightness signals and control data according to the control signals and the display data after receiving the display data and the control signals, so that the function of a master controller for generating the backlight brightness signals is integrated in the time schedule controller, the time schedule controller transmits the backlight brightness signals and the control data to each display driver, and each display driver generates LED driving control signals according to the backlight brightness signals and the control data.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic diagram of an exemplary conventional display system provided herein;
FIG. 2 is a schematic diagram of a display system provided in accordance with an exemplary embodiment of the present application;
FIG. 3 is a schematic block diagram of a display system provided in accordance with another exemplary embodiment of the present application;
FIG. 4A is a diagram illustrating a connection relationship between a display driver and multiple LED control signal outputs according to an exemplary embodiment of the present application;
FIG. 4B is a diagram illustrating a connection relationship between display drivers for multiple LED control signal outputs according to an exemplary embodiment of the present application;
FIG. 5 is a schematic diagram of a display system provided in accordance with another exemplary embodiment of the present application;
FIG. 6 is a schematic block diagram of a display system provided in accordance with another exemplary embodiment of the present application;
FIG. 7 is a schematic diagram of a display system provided in accordance with another exemplary embodiment of the present application;
specific embodiments of the present application have been shown by way of example in the drawings and will be described in more detail below. The drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the concepts of the application by those skilled in the art with reference to specific embodiments.
Reference numerals:
10: a master controller; 11: a conventional timing control board; 111: a conventional timing controller; 12: a backlight circuit control board; 121: a local backlight controller; 13: a conventional flexible display driver board; 131: a conventional display driver; 14: an LCD display screen; 15: a backlight circuit; 151: an LED driver; 152: an LED;16: a second connecting structure; 17: a first connecting structure; 18: a third connecting structure; 19: a first flexible display drive board; 191: a first display driver; 20: a first timing control board; 201: a first timing controller; 21: a second timing control board; 211: a second timing controller; 22: a second flexible display drive board; 221: a second display driver.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The display system is a system composed of a liquid crystal display panel, a backlight circuit and a display driving system, and the liquid crystal display panel and the backlight circuit can display corresponding images or videos under the driving of the display driving system.
The circuit structure of the conventional display system is shown in fig. 1, and the display driving system includes a main controller 10, a conventional timing control board 11, a conventional timing controller 111, a backlight circuit control board 12, a local backlight controller 121, a plurality of conventional flexible display driving boards 13, a plurality of conventional display drivers 131, an LCD display screen 14, and a backlight circuit 15, wherein the backlight circuit 15 includes a plurality of cascaded LED drivers 151 and a plurality of LEDs 152. The conventional timing controller 111 is connected to the conventional timing control board 11, the local backlight controller 121 is connected to the backlight circuit control board 12, and the conventional display driver 131 is connected to the conventional flexible display driving board 13.
The circuit connection relationship of the conventional display system is as follows: the master controller 10 is connected to the conventional timing controller 111, the conventional timing controller 111 is connected to each conventional display driver 131, and each conventional display driver 131 is connected to a corresponding LCD driving signal input terminal of the LCD panel 14. The main controller 10 is further connected to the local backlight controller 121 through an SPI interface, the local backlight controller 121 is connected to the corresponding cascaded LED drivers 151 through respective LED control signal output terminals, and the respective LED drivers are connected to the LEDs 152 around the respective LED drivers.
In the working process of the conventional display system, the main controller 10 obtains display data and control data, and the main controller 10 generates a corresponding backlight brightness signal according to the display data. On one hand, the main controller 10 transmits the backlight brightness signal to the local backlight controller 121 through the SPI interface, the local backlight controller 121 generates a corresponding LED driving control signal according to the backlight brightness signal, and transmits the LED driving control signal to the corresponding cascaded LED drivers 151, each group of cascaded LED drivers 151 receives a group of LED driving control signals, and sequentially receives the corresponding LED driving control sub-signals according to the cascade order, and each LED driver 151 generates a corresponding LED driving signal according to the obtained LED driving control sub-signal to drive the LEDs 152 around the LED driver 151 to emit light. On the other hand, the main controller 10 transmits the display data and the control data to the conventional timing controller 111, the conventional timing controller 111 converts the display data into point-to-point differential signals that can be processed by each conventional display driver 131 according to the control signals and transmits the point-to-point differential signals to the corresponding conventional display driver 131, and the conventional display driver 131 generates corresponding LCD driving signals according to the obtained signals and transmits the LCD driving signals to the LCD panel 14, so that the corresponding areas on the LCD panel 14 image the display data. In one embodiment, the point-to-point differential signals may be transmitted over an ISP interface, CHPI interface, USIT interface, or CEDS interface.
In the above-mentioned conventional display system, because the LCD display screen 14 and the backlight circuit 15 are controlled by different chips, the whole conventional display system has a large number of chips, a complex circuit connection relationship and a high configuration cost, and in the application process of the display system, a worker is required to debug each unit in the display system, which results in a large workload and a low debugging efficiency. In addition, when a worker develops a control method of the backlight circuit, the worker needs to adjust the LED driving control signal, and correspondingly, the backlight brightness signal which is transmitted by the master controller to the LED driver and used for generating the LED driving control signal is also correspondingly adjusted, so that the worker needs to adjust the SPI interface of the master control board, which results in inflexible development of the display driving system and high cost.
In view of the above technical problems, the present application provides a display system, which aims to solve the technical problems that the circuit structure circuit layout corresponding to the display system is complex, the display system is inflexible to develop, and the cost is high. The technical idea of the application is as follows: the function of generating backlight brightness signals is integrated in a time sequence controller, the function of generating LED driving control signals according to the backlight brightness signals is integrated in display drivers, so that after the time sequence controller obtains display data and control signals, corresponding backlight brightness signals are generated according to the display data, the backlight brightness signals and the display data are transmitted to the display drivers, the display drivers generate corresponding LED driving control signals according to the backlight brightness signals, and the LED driving control signals are transmitted to corresponding first connecting structures on a backlight circuit, so that the backlight circuit emits light according to the LED driving control signals.
Two display systems provided in the present application are explained below.
Fig. 2 is a schematic structural diagram of a display system according to an exemplary embodiment of the present disclosure, where the display system includes a first timing controller 201, a plurality of first display drivers 191, an LCD panel 14, and a backlight circuit 15, the backlight circuit 15 is provided with a plurality of first connection structures 17, the first timing controller 201 is respectively connected to the first display drivers 191, the first display drivers 191 are connected to the LCD panel 14, and the first display drivers 191 are connected to the backlight circuit 15 through the first connection structures 17.
After receiving the display data and the control signal transmitted by the main controller, the first timing controller 201 generates a backlight brightness signal and control data according to the control signal and the display data, the first timing controller 201 transmits the backlight brightness signal and the control data to each first display driver 191, each first display driver 191 generates an LED driving control signal according to the backlight brightness signal and the control data, and transmits the LED driving control signal to the backlight circuit 15 through the first connecting structure 17, so as to control the LED driver 151 in the backlight circuit 15 to drive the corresponding LED 152 to emit light.
In addition, the first display driver 191 drives the LCD panel 14 to display in the same manner as in the conventional display system, and thus the description thereof is omitted. When the first timing controller 201 transmits data to each first display driver 191, in an embodiment, the first timing controller 201 generates display driving control data that can be processed by each first display driver 191 according to the backlight brightness signal, the first timing controller 201 transmits the backlight brightness signal, the control data and the display driving control data to each first display driver 191, each first display driver 191 splits the data in the data packet, and then uses the obtained control data to configure a mode that the first display driver 191 generates a corresponding LED driving control signal according to the backlight brightness signal, and converts the backlight brightness signal according to the mode, and the generated LED driving control signal is used for controlling the LED driver to drive the LED to emit light; each first display driver 191 also processes the display drive control data in the data packet to generate a corresponding LCD drive signal, which is used to drive the LCD display 14 to display an image.
In another embodiment, after the first timing controller 201 generates the display driving control data that can be processed by each first display driver 191 according to the backlight brightness signal, the first timing controller 201 generates a data packet from the backlight brightness signal and the display driving control data and transmits the data packet to each first display driver 191, and at the same time, the first timing controller 201 transmits the control data to each first display driver by using another connection line. Compared with the data processing procedure of the first display driver 191, the first display driver 191 does not need to parse the control data from the data packet any more, and the remaining processing procedure is the same as the above-mentioned procedure, and is not described herein again.
In the above technical solution, the display system does not need the main controller to generate and transmit the backlight brightness signal through the SPI interface according to the display data, and the function is integrated into the first timing controller, so that the circuit structure related to the SPI interface in the main controller does not need to be adjusted in the display system development process, and then the first display driver integrates the local backlight controller into the first display driver, which generates the LED driving control signal according to the backlight brightness signal, thereby reducing the number of devices used in the display system, simplifying the circuit connection relationship, and reducing the circuit structure circuit layout complexity and development cost of the display system.
More specifically, the display system further includes a first timing control board 20 and a plurality of first flexible display driving boards 19, the first display driver 191 includes an LCD driving signal output terminal and an LED control signal output terminal, and the backlight circuit 15 includes a plurality of first connection structures 17, a plurality of sets of cascaded LED drivers 151, and a plurality of LEDs 151 connected to the respective LED drivers 151. The LED control signal output ends of the first display driver 191 are connected to the corresponding first connection structures 17, the first connection structures 17 are connected to the input ends of the corresponding cascade LED drivers, the number of the LED control signal output ends is the same as the number of the groups of the cascade LED drivers, and the number of the first connection structures is equal to the number of the groups of the cascade LED drivers.
In one embodiment, the first display driver 191 may be connected with the first connection structure 17 through the second connection structure 16. More specifically, as shown in fig. 2, the first timing control board 20 is provided with a plurality of second connection structures 16, the LED control signal output end of the first display driver 191 is connected to the corresponding second connection structure 16 through the connection line on the first flexible display drive board 19 and the connection line on the first timing control board 20, and each second connection structure 16 is connected to the corresponding first connection structure 17 through a flexible circuit board (FPC) in a wired (Wire) or serial transmission, so as to connect the LED control signal output end of the first display driver 191 to the corresponding first connection structure 17, where the number of the second connection structures 16 is equal to the number of the first connection structures 17, and the types of the second connection structures 16 and the first connection structures 17 are the same, that is, when the second connection structure 16 is connected to the corresponding first connection structure 17 through a wired (Wire), both the second connection structure 16 and the first connection structure 17 are connection points (connectors); when the second connection structure 16 is connected to the corresponding first connection structure 17 through a serial flexible circuit board (FPC), both the second connection structure 16 and the first connection structure 17 are FPC bonding.
In another embodiment, the first display driver 191 may be connected with the first connection structure 17 through the third connection structure 18. More specifically, as shown in fig. 3, a plurality of third connection structures 18 are disposed on the LCD display screen 14, the LED control signal output end of the first display driver 191 is connected to the corresponding third connection structure 18 through a connection line on the first flexible display driving board 19 and a connection line on the LCD display screen 14, and each third connection structure 18 is connected to the corresponding first connection structure 17 on the backlight circuit 15 through a flexible circuit board for serial transmission. The type of the third connecting structure 18 and the connecting manner with the first connecting structure 17 are the same as the second connecting structure, and are not described herein again.
When the first display driver 191 includes a plurality of LED control signal outputs, one LED control signal output of the first display driver 191 is connected to one second connection structure 16 or the third connection structure 18. For example: when one first display driver 191 controls two sets of cascaded LED drivers to drive the LEDs 152 to emit light, the first display driver 191 includes two LED control signal output ends, the two LED control signal output ends are respectively connected with the two second connection structures 16, the two second connection structures 16 are respectively connected with the two corresponding first connection structures 17 in the backlight circuit 15, and each first connection structure 17 is connected with one set of cascaded LED drivers 151.
The positional relationship between the two second connecting structures 16 and the first display driver 191 is shown in fig. 4A and 4B. The second connecting structures 16 shown in fig. 4A are disposed on one side of the first display driver 191, and the second connecting structures 16 shown in fig. 4B are distributed on two sides of the first display driver 191 for adapting to different wiring scenarios. It should be noted that the number of the second connecting structures 16 in fig. 4A and 4B is determined by the number of the LED control signal output terminals of the corresponding first display driver 191, the position relationship of the second connecting structures 16 on the first timing control board 20 is determined by the circuit arrangement state of the display system, and fig. 4A and 4B are only an embodiment.
In the circuit connection relationship shown in fig. 2 to 4B, the first display driver 191 is connected to the LCD display 14 through a corresponding first connection region on the LCD display 14, the LCD display 14 includes a plurality of first connection regions, the first timing control board 20 is connected to each first flexible display driving board 19, and each first flexible display driving board 19 is connected to the corresponding first connection region. Each first flexible display driving board 19 is connected to a first display driver 191, and each first display driver 191 transmits the generated LCD driving signal to the LCD driving signal input terminal corresponding to the LCD display screen 14 through the corresponding first connection region. In one embodiment, the first connection region is a Chip On Film (COF) connection region, and the first display driver 191 is connected to the LCD panel 14 in a COF package manner.
The first display drivers 191 may also be connected through corresponding second connection regions on the LCD display screen 14, a plurality of second connection regions are provided on the LCD display screen 14, the first timing control board 20 is connected with each first flexible display driving board 19, each first flexible display driving board 19 is connected with a corresponding first display driver 191, and each first display driver 191 is connected with a corresponding second connection region on the LCD display screen 14, so that each first display driver 191 transmits the generated LCD driving signal to the LCD display screen 14 through the corresponding second connection region. In one embodiment, the second connection region is a Chip On Glass (COG) connection region, and the first display driver 191 is connected to the LCD panel 14 by COG packaging.
When the first display driver is connected to the LCD panel 14 by COG packaging, the structure of the display system and other connection relationships of the components described in fig. 2 to 4B are also applicable to the display system using COG packaging, in addition to the above-described difference relationship.
More specifically, when the second connection structure 16 is disposed on the first timing control board 20 in the display system, the circuit connection relationship is as shown in fig. 5, which is similar to the circuit connection relationship shown in fig. 2 and is not repeated herein; when the third connecting structure 18 is disposed on the LCD panel 14 in the display system, the circuit connection relationship is as shown in fig. 6, which is similar to the circuit connection relationship shown in fig. 3, and is not repeated herein.
In the technical scheme, the integration level of the control board and the chip in the circuit structure is adjusted by setting the position and the type of the first connection point or the third connection point in the display system, so that the diversity of application scenes applicable to the display system is increased, and meanwhile, compared with the circuit structure of the traditional display system, the circuit structure corresponding to the display system not only reduces the independent circuit board and the chip, but also reduces the flat cable quantity in the circuit, thereby reducing the complexity of the circuit structure circuit layout of the display system, in addition, the circuit board and the chip which exist in the circuit structure do not have replacement operation, and the configuration cost of the circuit is reduced.
The present application also proposes another display system whose circuit connection structure is shown in fig. 7. The display system shown in fig. 7 is different from the display system shown in fig. 2 in that the chips used in the display system shown in fig. 7 are the second timing controller 211 and the second display driver 221, and the circuit boards on which the chips are located are the second timing control board 21 and the second flexible display driver board 22, respectively. The remaining circuit structure of the display system shown in fig. 7 is the same as the corresponding circuit structure of fig. 2, and is not repeated here.
The second timing controller 211 transmits the display data and the control signal to each of the second display drivers 221 after receiving the display data and the control signal transmitted from the main controller, and the second display drivers 221 generate the LED driving control signal according to the control signal and the display data and transmit the LED driving control signal to the backlight circuit 15 through the first connection structure 17. The second timing controller 211 may package the data to be transmitted and transmit the packaged data to the second display driver 221, or respectively transmit the data to be transmitted, which is not limited herein.
The control signal received by the second display driver 221 is used to control the working mode of the second display driver 221 for generating the backlight brightness signal according to the display data, and is also used to control the working mode of the second display driver 221 for generating the LED driving control signal according to the backlight brightness signal. The second display driver 221 generates a corresponding LED driving control signal according to the display data, and controls the corresponding LED driver 151 to drive the corresponding LED 152 to emit light through the first connection structure 17.
More specifically, the second display driver 221 may be connected with the first connection structure 17 through the second connection structure 16, and the connection relationship of the second connection structure 16 on the second timing control board 21 is the same as the connection relationship of the second connection structure 16 on the first timing control board 20 shown in fig. 2; the second display driver 221 may also be connected to the first connecting structure 17 through a third connecting structure 18, and the connection relationship of the third connecting structure 18 on the LCD display 14 is the same as that shown in fig. 3.
In addition, the packaging manner of the second display driver 221 and the LCD display 14 is the same as that of the first display driver 191, and a COG packaging manner or a COF packaging manner may be applied according to an application scene, which is not described herein again.
In the above technical solution, the display system integrates both the function of generating the backlight brightness signal by the main controller and the function of generating the LED driving control signal by the local backlight controller in the conventional display system into the display driver, so that the display system can still normally operate after simplifying the related control panel, the controller and the SPI interface, the complexity and the cost of the circuit layout of the circuit structure are reduced, in addition, the display system is connected with the first connection structure by the second connection structure or the third connection structure, the flexibility of the circuit connection is increased, the diversity of the application scenarios of the display system proposed by the present application is enlarged, and thus the development flexibility of the display system is promoted.
The application provides a display device comprising any one of the display systems provided by the above embodiments.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. A display system, comprising: the display device comprises a time sequence controller, a plurality of display drivers, an LCD display screen and a backlight circuit, wherein the backlight circuit is provided with a first connecting structure;
the time schedule controller generates a backlight brightness signal and control data according to the control signal and the display data after receiving the display data and the control signal;
the time sequence controller transmits the backlight brightness signal and the control data to each display driver;
and each display driver generates an LED driving control signal according to the backlight brightness signal and the control data, and transmits the LED driving control signal to the backlight circuit through the first connecting structure.
2. The display system of claim 1, wherein each of the display drivers includes an LCD drive signal output and an LED control signal output, and the backlight circuit includes a plurality of cascaded sets of LED drivers and a plurality of the first connection structures;
the LCD driving signal output end is connected with the driving signal input end of the LCD display screen, the LED control signal output end is connected with the corresponding first connecting structure, and the first connecting structure is connected with the input end of the corresponding cascade LED driver;
the number of the LED control signal output ends is the same as the number of the groups of the cascade LED drivers, and the number of the first connecting structures is equal to the number of the groups of the cascade LED drivers.
3. The display system of claim 2, further comprising a timing control board, wherein the timing control board is provided with a plurality of second connecting structures;
the LED control signal output end is connected with the corresponding second connecting structure, and each second connecting structure is connected with the corresponding first connecting structure through a flexible circuit board in flat cable or serial transmission;
the number of the second connecting structures is equal to the number of the first connecting structures.
4. A display system according to claim 3, wherein when the display driver comprises a plurality of the LED control signal outputs, one LED control signal output of the display driver is connected to one of the second connection structures.
5. The display system according to claim 2, wherein a plurality of third connecting structures are disposed on the LCD display screen, the LED control signal output terminals are connected to the corresponding third connecting structures, and each of the third connecting structures is connected to the corresponding first connecting structure through a serial transmission flexible circuit board.
6. The display system of claim 1, further comprising a timing control board and a plurality of flexible display drive boards; the LCD display screen comprises a plurality of first connecting areas;
the time sequence controller is connected with the time sequence control board, and each flexible display driving board is connected with one display driver; the time sequence controller is connected with the flexible display driving boards, and the flexible display driving boards are connected with the corresponding first connecting areas;
and each display driver transmits the LCD driving signal generated by the display driver to the LCD display screen through the corresponding first connecting area.
7. The display system of claim 1, further comprising a timing control board and a plurality of flexible display drive boards; a plurality of second connecting areas are arranged on the LCD display screen;
the time sequence controller is connected with the time sequence control board, the time sequence control board is connected with the flexible display drive boards, the flexible display drive boards are connected with the corresponding display drivers, and the display drivers are connected with the corresponding second connection areas;
and each display driver transmits the LCD driving signal generated by the display driver to the LCD display screen through the corresponding second connecting area.
8. A display system, comprising: the display device comprises a time sequence controller, a plurality of display drivers, an LCD display screen and a backlight circuit, wherein the backlight circuit is provided with a first connecting structure;
the time schedule controller transmits the display data and the control signal to each display driver after receiving the display data and the control signal;
and the display driver generates an LED driving control signal according to the control signal and the display data, and transmits the LED driving control signal to the backlight circuit through the first connecting structure.
9. The display system of claim 8, wherein each of the display drivers includes an LCD drive signal output and an LED control signal output, and the backlight circuit includes a plurality of sets of cascaded LED drivers and a plurality of first connection structures;
the LCD driving signal output end is connected with the driving signal input end of the LCD display screen, the LED control signal output end is connected with the corresponding first connecting structure, and the first connecting structure is connected with the input end of the corresponding cascade LED driver; the number of the LED control signal output ends is the same as the number of the groups of the cascade LED drivers, and the number of the first connecting structures is equal to the number of the groups of the cascade LED drivers.
10. The display system of claim 9, further comprising a timing control board;
the time sequence control board is provided with a plurality of second connecting structures, and the backlight circuit is provided with a plurality of first connecting structures; the LED control signal output end is connected with the corresponding second connecting structure, and each second connecting structure is connected with the corresponding first connecting structure through a flexible circuit board in flat cable or serial transmission; the number of the second connecting structures is equal to the number of the first connecting structures, and the number of the first connecting structures is equal to the number of the groups of the cascaded LED drivers;
or
The LCD display screen is provided with a plurality of third connecting structures, the LED control signal output end is connected with the corresponding third connecting structure, and each third connecting structure is connected with the corresponding first connecting structure through a flexible circuit board in serial transmission.
CN202211167541.4A 2022-09-23 2022-09-23 Display system Active CN115394267B (en)

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CN104424913A (en) * 2013-08-26 2015-03-18 深圳中电长城信息安全系统有限公司 Backlight brightness adjusting circuit, backlight brightness adjusting method and computer
CN110379386A (en) * 2019-06-11 2019-10-25 惠科股份有限公司 Display panel and display
CN211427809U (en) * 2019-04-23 2020-09-04 昆山龙腾光电股份有限公司 Backlight driving circuit and liquid crystal display device

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US20090109165A1 (en) * 2007-10-31 2009-04-30 Mun-Soo Park Display device and driving method thereof
CN201392641Y (en) * 2009-04-17 2010-01-27 天马微电子股份有限公司 Drive circuit for driving liquid crystal module group
CN104424913A (en) * 2013-08-26 2015-03-18 深圳中电长城信息安全系统有限公司 Backlight brightness adjusting circuit, backlight brightness adjusting method and computer
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