Liquid crystal panel and mainboard matching system

Abstract

The utility model discloses a liquid crystal panel and mainboard matching system which comprises a liquid crystal panel and a mainboard, and the liquid crystal panel comprises a liquid crystal screen and an XB board. The liquid crystal screen and the XB board are connected through a mini COF. The main board and the XB board are connected through a flexible flat cable; the mainboard sends an image signal in a V-by-one format to an XB board of the liquid crystal panel through the flexible flat cable; a signal conversion circuit is arranged on the XB board; and the signal conversion circuit is used for converting the image signal in the V-by-one format into an image signal in a mini-LVDS format. The liquid crystal display does not need an adapter plate, and is matched with a mini COF, so that the production cost of the liquid crystal display is effectively reduced, and the assembly process of the liquid crystal display is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of liquid crystal display equipment, specifically relates to a system that liquid crystal panel and mainboard collocate. BACKGROUND

[0002] In the field of liquid crystal display equipment, liquid crystal panel usually collocates the mainboard of the whole machine factory to realize the display of image signal. Because the mainboard interface standards of various whole machine factories are inconsistent, leading to the fact that the existing mainboard collocates the architecture of liquid crystal panel more, and the liquid crystal panel factory wants to adapt to the mainboard output of different whole machine factories, and it is necessary to meet through Pin sequence adjustment / signal conversion and various ways, leading to the fact that the production process of liquid crystal panel is complex and the cost rises, and at the same time, the whole machine factory also needs to develop the mainboard of different interfaces to cope with the liquid crystal panel of different liquid crystal screen factories.

[0003] In the related art, the system that liquid crystal panel collocates the mainboard includes the following several commonly used architectures:

[0004] 1, the mainboard uses V-by-one (television signal transmission protocol) signal output, and the flexible flat cable of 51 pins is connected to a signal adapter plate, and the signal is transmitted to the output module of the liquid crystal panel after the signal conversion of the adapter plate.

[0005] 2, the mainboard uses P2P signal (point-to-point signal for liquid crystal display screen) output, the interface of the driving system of the liquid crystal panel and the mainboard is inconsistent, at this time, the output of the mainboard is connected to the adapter plate through the flexible flat cable, and then the interface sequence is exchanged and matched in the adapter plate, and the signal is given to the output module of the liquid crystal panel.

[0006] 3, the mainboard uses P2P signal output, as shown in the figure, Figure 1 The output connector of the mainboard has 68 pins, and the input connector of the driving system of the liquid crystal panel also has 68 pins, but the pin sequence does not match the mainboard, so the pin sequence conversion is also needed through the adapter plate.

[0007] Because the above three architectures all need to use an additional adapter plate to realize the adaptation between the mainboard and the liquid crystal panel, and the whole machine side where the mainboard is located also needs to reserve space on the mainboard to place and fix the adapter plate, therefore, the three existing architectures all produce a large amount of additional cost due to the introduction of the adapter plate. In addition, for the architecture that the mainboard uses P2P signal output, it usually uses ISP (image signal processing) COF (Chip On Film) to connect the liquid crystal screen and the XB board on the liquid crystal panel side, because the cost of ISP COF is high, therefore, the architecture further increases the cost. UTILITY MODEL CONTENTS

[0008] In order to solve the above problems existing in the prior art, the utility model provides a system that liquid crystal panel and mainboard collocate.

[0009] The technical problem to be solved by the utility model is solved through the following technical scheme:

[0010] A system of liquid crystal panel and mainboard collocation, comprising: liquid crystal panel and mainboard, the liquid crystal panel includes liquid crystal screen and XB board;The liquid crystal screen and the XB board are connected through mini COF;The mainboard and the XB board are connected through flexible flat cable;The mainboard sends the image signal of V-by-one format to the XB board of the liquid crystal panel through the flexible flat cable;The XB board is equipped with signal conversion circuit;The signal conversion circuit is used to convert the image signal of V-by-one format into the image signal of mini-LVDS format.

[0011] Optionally, the signal conversion circuit is a signal conversion chip.

[0012] Optionally, the signal conversion chip is NT619XX.

[0013] Optionally, the flexible flat cable is flexible flat cable or flexible printed circuit board.

[0014] Optionally, the XB board is equipped with gamma voltage correction chip;The gamma voltage correction chip is used to output gamma reference voltage.

[0015] Optionally, the XB board is equipped with Level Shifter;The Level Shifter is used to provide the liquid crystal panel with scanning timing signal.

[0016] Optionally, the XB board is equipped with power supply module;The power supply module is used to power the XB board.

[0017] Optionally, the power supply module is power management integrated circuit PMIC.

[0018] In the system of liquid crystal panel and mainboard collocation provided by the utility model, the mainboard and the XB board are directly connected through flexible flat cable, no longer need adapter plate, and are collocated with mini COF, thereby reducing the production cost of liquid crystal display and reducing the assembly process of liquid crystal display (no need to assemble adapter plate).

[0019] The utility model will be further described in detail in combination with the drawings. DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a system architecture of mainboard output P2P signal collocation liquid crystal panel in prior art;

[0021] Figure 2It is a structure schematic view of a system of liquid crystal panel and mainboard collocation provided by the embodiment of the utility model.

[0022] Figure 3 It is a schematic view of circuit connection relation in the system of liquid crystal panel and mainboard collocation provided by the embodiment of the utility model.

[0023] Reference signs:

[0024] 1, mainboard;2, flexible flat cable;3, liquid crystal screen;4, XB board;5, signal conversion circuit;6, mini COF. Specific implementation

[0025] The utility model will be described in further detail in combination with specific embodiments, but the implementation of the utility model is not limited to this.

[0026] In order to reduce the production cost of liquid crystal display, reduce the assembly process of liquid crystal display, the embodiment of the utility model provides a kind of system of liquid crystal panel and mainboard collocation, as shown in Figure 2 It includes: liquid crystal panel and mainboard 1.

[0027] Among them, mainboard 1 is also called system on chip (System On Chip), and display screen image processing chip can be arranged on it, and the chip realizes residual image elimination by integrating overvoltage driving function, to provide clear image signal for liquid crystal panel.

[0028] Liquid crystal panel includes liquid crystal screen 3 and XB board 4;Liquid crystal screen 3 and XB board 4 are connected by mini COF 6;Mini COF 6 is a kind of grain soft film construction technology that integrates circuit (IC) is fixed on flexible circuit board, and it combines chip and soft substrate circuit by soft additional circuit board as encapsulation chip carrier.In liquid crystal panel, Mini COF is mainly used for display driving and control function, and it connects driving chip and circuit of liquid crystal panel through flexible circuit board, to realize signal transmission and control.

[0029] Mainboard 1 and XB board 4 are connected by flexible flat cable 2, that is, the utility model embodiment does not need to additionally increase the circuit board of switching function between mainboard 1 and XB board 4.Among them, flexible flat cable 2 can be flexible flat cable or flexible printed circuit board.Mainboard 1 sends V-by-one format image signal to XB board 4 of liquid crystal panel through flexible flat cable 2.The number of printed circuit board (Printed Circuit Board) constituting XB board 4 is greater than or equal to 1Specifically, for small size liquid crystal panel, at least one PCB is usually used, and for large size liquid crystal panel, the number of required PCB is usually greater than 1.

[0030] The utility model discloses an XB board 4 is provided with signal conversion circuit 5, and signal conversion circuit 5 is used to convert the image signal of V-by-one format into the image signal of mini-LVDS format.

[0031] The system generates the image signal of V-by-one format by the mainboard 1 when working, and sends the image signal of V-by-one format to the XB board 4 of liquid crystal panel through the flexible flat cable 2, and the signal conversion circuit 5 on the XB board 4 converts the image signal of V-by-one format into the image signal of mini-LVDS format. Figure 3 As shown in the figure, the signal conversion circuit 5 provides the image signal of mini-LVDS format for the image signal module, and the image signal module processes the image signal of mini-LVDS format into the digital signal for outputting image. The photoelectric conversion module is used for outputting the gamma reference voltage required by the image signal, and the digital signal outputted by the image signal module and the gamma reference voltage outputted by the photoelectric conversion module enter the mini COF 6, and the mini COF 6 outputs the driving voltage required by the liquid crystal screen 3 based on the gamma reference voltage, thereby generating the corresponding image. The scan clock module is used for outputting the scan clock, and the line-by-line scanning mode of liquid crystal panel is realized based on the scan clock, of course, the output scan mode of the scan clock module is not limited to line-by-line scanning. The function of the power supply module is power management. Specifically, the mainboard 1 provides power for the power supply module through the flexible flat cable 2, and the power supply module supplies power for itself and other modules (signal conversion circuit 5, image signal module, scan clock module, photoelectric conversion module) on the XB board and the mini COF 6 based on the power.

[0032] The specific function implementation of the above image signal module, scan clock module, photoelectric conversion module and power supply module is the same as the corresponding module of the existing liquid crystal panel, and the utility model will not be described in detail. In addition, the utility model does not limit the specific circuit structure of signal conversion circuit 5, and the signal format conversion from V-by-one to mini-LVDS can be realized. For example, the signal format conversion circuit from V-by-one to mini-LVDS can be set by referring to the V-by-One interface and LVDS interface conversion device disclosed in the utility model patent with publication number CN215298223U, or using the existing special chip for realizing signal format conversion, which is all possible.

[0033] The system with the liquid crystal panel and the mainboard provided by the utility model is characterized in that the mainboard 1 and the XB board 4 are directly connected through the flexible flat cable 2, and the mini COF 6 is matched, so that the production cost of the liquid crystal display is reduced, and the assembling process of the liquid crystal display is reduced (without assembling the adapter board).

[0034] In an embodiment, in order to facilitate the integration of the signal conversion circuit 5 on the XB board 1, a signal conversion chip can be used, which is mainly used for converting the image signal in the V-by-one format into the image signal in the mini-LVDS format.

[0035] It is worth mentioning that the NT619XX has the signal format conversion function from V-by-one to mini-LVDS, and can also generate a clock signal to provide the scanning clock module.

[0036] In an embodiment, the photoelectric conversion module mentioned above can be a gamma voltage correction chip.

[0037] In an embodiment, the scanning clock module mentioned above can be a Level Shifter (LS), that is, a level conversion application chip.

[0038] In an embodiment, the power supply module can be a power management integrated circuit (PMIC, Power Management Integrated Circuit).

[0039] In one embodiment, the main board 1 can also send IIC (Inter-Integrated Circuit, Inter-Integrated Circuit) signals and / or SPI (Serial Peripheral Interface, Serial Peripheral Interface) signals to the XB board 4 of the liquid crystal panel through the flexible flat cable 2. The XB board 4 is provided with a module for receiving and processing IIC signals and / or SPI signals. Thus, by connecting the main board 1 and the XB board 4 of the liquid crystal panel through a flexible flat cable 2, the liquid crystal panel can support more signal types.

[0040] It should be noted that the terms "first", "second", and the like, are used to distinguish similar objects, and do not necessarily have to be used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of devices and methods consistent with some aspects of the utility model.

[0041] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification.

[0042] Although the utility model is described herein in conjunction with various embodiments, those skilled in the art can understand and implement other changes of the disclosed embodiments by viewing the drawings and disclosure in the process of implementing the claimed utility model. In the description of the utility model, the word "comprising" does not exclude other components or steps, "one" or "a" does not exclude multiple cases, and "multiple" means two or more, unless otherwise explicitly specified. In addition, some measures are recorded in different embodiments, but this does not mean that these measures cannot be combined to produce good results.

[0043] In the utility model, unless another definite provision and limitation, the term "mount", "link", "connect", "fix" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection;Can be direct connection, also can indirectly connect through intermediate medium, can be two element inside's intercommunication or two element's mutual action relation. For ordinary skilled person in the art, can understand the specific meaning of above-mentioned term in the utility model according to specific circumstances.

[0044] The above is further detailed description of the utility model in combination with specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled person in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can also be made, which should be considered as belonging to the protection scope of the utility model.

Claims

1. A system of a liquid crystal panel and a main board, comprising: The liquid crystal panel and the mainboard, the liquid crystal panel includes liquid crystal screen and XB board, characterized in that, the liquid crystal screen and the XB board are connected through mini COF, the mainboard and the XB board are connected through flexible flat cable, the mainboard sends the image signal of V-by-one format to the XB board of the liquid crystal panel through the flexible flat cable, the XB board is equipped with signal conversion circuit, and the signal conversion circuit is used to convert the image signal of V-by-one format into the image signal of mini-LVDS format.

2. The system of claim 1, wherein the liquid crystal panel is coupled to the main board. The signal conversion circuit is a signal conversion chip.

3. The system of claim 2, wherein the liquid crystal panel is coupled to the main board through a flexible printed circuit board (FPCB). The signal conversion chip is NT619XX.

4. The system of claim 1, wherein the liquid crystal panel is coupled to the main board. The flexible flat cable is flexible flat cable or flexible printed circuit board.

5. The system of claim 1, wherein the liquid crystal panel is coupled to the main board. The XB board is equipped with gamma voltage correction chip, and the gamma voltage correction chip is used to output gamma reference voltage.

6. The system of claim 1, wherein the liquid crystal panel is coupled to the main board. The XB board is equipped with Level Shifter, and the Level Shifter is used to provide scanning timing signal for the liquid crystal panel.

7. The system of claim 1, wherein the liquid crystal panel is coupled to the main board. The XB board is equipped with power supply module, and the power supply module is used to power the XB board.

8. The system of claim 7, wherein the liquid crystal panel is coupled to the main board through a flexible printed circuit board (FPCB). The power supply module is power management integrated circuit (PMIC).

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