CN113990252B - Drive circuit and display module - Google Patents
Drive circuit and display module Download PDFInfo
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- CN113990252B CN113990252B CN202111284252.8A CN202111284252A CN113990252B CN 113990252 B CN113990252 B CN 113990252B CN 202111284252 A CN202111284252 A CN 202111284252A CN 113990252 B CN113990252 B CN 113990252B
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The application discloses drive circuit and display module assembly relates to and shows technical field, includes: the fixed voltage signal line comprises a first branch and a second branch; the noise reduction module is positioned between the first branch and the second branch and comprises a first input end, a second input end and an output end, the first input end is electrically connected with the first branch, the second input end is connected with a fixed voltage, and the output end is electrically connected with the second branch; the noise reduction module is used for eliminating interference voltage on the fixed voltage signal wire. This application is through setting up the module of making an uproar, and a fixed voltage is connected to the second input electricity at the module of making an uproar, and the voltage after the output of the module of making an uproar purifies, and this voltage is for getting rid of the voltage after the influence promptly, and the normal demonstration of each pixel in the assurance display panel can be effectually got rid of the interference factor of fixed voltage signal among the display panel.
Description
Technical Field
The application relates to the technical field of display, in particular to a driving circuit and a display module.
Background
With the continuous development of Display technology, the manufacturing technology of Display panels also tends to mature, and the existing Display panels mainly include Organic Light Emitting Display panels (OLEDs), liquid Crystal Display panels (LCDs), plasma Display Panels (PDPs), and the like. The organic light emitting display device as the self light emitting display device does not require a separate light source. Accordingly, the organic light emitting display device can operate at a low voltage, is light and thin, and provides high quality characteristics such as a wide viewing angle, high contrast, and fast response. Therefore, organic light emitting display devices have been receiving attention as next generation display devices. Organic Light-Emitting diodes (OLEDs), which have low power consumption, high resolution, fast response and other excellent photoelectric characteristics, are becoming the mainstream technology of OLED displays.
In the prior art, the light emission of the organic light emitting diode needs to be driven by the pixel circuit, and the signal line in the pixel circuit is easily affected by the interference voltage due to being in an electrical environment, so that the display effect of the display panel is affected.
Disclosure of Invention
In view of this, the present application provides a driving circuit and a display module, which can effectively eliminate the influence of the interference voltage by providing the noise reduction module.
In order to solve the technical problem, the following technical scheme is adopted:
in a first aspect, the present application provides a driving circuit comprising:
the fixed voltage signal line comprises a first branch and a second branch;
the noise reduction module is positioned between the first branch and the second branch and comprises a first input end, a second input end and an output end, the first input end is electrically connected with the first branch, the second input end is connected with a fixed voltage, and the output end is electrically connected with the second branch; the noise reduction module is used for eliminating interference voltage on the fixed voltage signal line.
In a second aspect, the present application further provides a display module, which includes a driving circuit, and the driving circuit is the driving circuit provided by the present application.
Compared with the prior art, the driving circuit and the display module provided by the invention at least realize the following beneficial effects:
the driving circuit and the display module provided by the application are provided with a fixed voltage signal line, the fixed voltage signal line comprises a first branch and a second branch, and the noise reduction module is connected in series on the fixed voltage signal line, namely the noise reduction module is positioned between the first branch and the second branch; the noise reduction module comprises a first input end electrically connected with the first branch circuit, an output end electrically connected with the second branch circuit, and a second input end electrically connected with a fixed voltage; the voltage of the first branch of the fixed voltage signal line comprises interference voltage, and the interference voltage can be eliminated through the noise reduction module; the second input end of the noise reduction module is electrically connected with a fixed voltage, the purified voltage is output through the output end of the noise reduction module, namely the voltage is the voltage after influence elimination, interference factors of fixed voltage signals in the display panel can be effectively eliminated, and normal display of each pixel in the display panel is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a driving circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram illustrating a variation of a voltage signal on a fixed voltage signal line according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a pixel driving circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a driving circuit according to an embodiment of the present disclosure;
fig. 5 is a top view of a display module according to an embodiment of the invention;
fig. 6 is a schematic structural diagram of a driving circuit according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a driving circuit according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a driving circuit according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of another driving circuit provided in the embodiment of the present application.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, that a person skilled in the art will be able to solve the technical problem within a certain error range, substantially to achieve the technical result. Furthermore, the term "coupled" is intended to encompass any direct or indirect electrical coupling. Thus, if a first device couples to a second device, that connection may be through a direct electrical coupling or through an indirect electrical coupling via other devices and couplings. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims. The same parts between the embodiments are not described in detail.
The following detailed description is to be read with reference to the drawings and the detailed description.
Fig. 1 is a schematic structural diagram of a driving circuit according to an embodiment of the present application, and fig. 2 is a schematic structural diagram of a variation of a voltage signal on a fixed voltage signal line according to an embodiment of the present application, please refer to fig. 1 and fig. 2, which provide a driving circuit 100 including:
a fixed voltage signal line 10 including a first branch 11 and a second branch 12;
the noise reduction module 20 is located between the first branch 11 and the second branch 12, the noise reduction module 20 includes a first input end 21, a second input end 22 and an output end 23, the first input end 21 is electrically connected with the first branch 11, the second input end 22 is connected with a fixed voltage, and the output end 23 is electrically connected with the second branch 12; the noise reduction module 20 is used to eliminate the interference voltage on the fixed voltage signal line 10.
Specifically, as shown in fig. 1 and fig. 2, the driving circuit in this embodiment may be a pixel driving circuit, and the fixed voltage signal line 10 included in the driving circuit may be a signal line inputting a fixed voltage in the pixel driving circuit, alternatively, the fixed voltage signal line 10 may be a PVDD signal line and a PVEE signal line, and certainly, may also be another signal line inputting a fixed voltage, which is not limited herein.
In the related art, the pixels in the display panel are lit up in a current driving manner, and since each fixed voltage signal line is in an electrical environment, an undesired interference voltage with respect to a reference ground is inevitably generated, so that signals on the fixed voltage signal lines are affected, and further, the display of the pixels in the display panel is affected; in view of this, the present application introduces a noise reduction module 20 on the basis of the original driving circuit, so as to eliminate the interference voltage on the fixed-voltage signal line 10.
For a specific circuit configuration structure, please refer to the following, please refer to fig. 1 and fig. 2 continuously, in this embodiment, the fixed voltage signal line 10 includes a first branch 11 and a second branch 12, the noise reduction module 20 is connected in series to the fixed voltage signal line 10, that is, the noise reduction module 20 is located between the first branch 11 and the second branch 12, optionally, a first input end 21 included in the noise reduction module 20 is electrically connected to the first branch 11, an output end 23 included in the noise reduction module 20 is electrically connected to the second branch 12, and a second input end 22 included in the noise reduction module 20 is electrically connected to a fixed voltage; it can be understood that, referring to the voltage variation on the fixed voltage signal line 10 in fig. 2, the voltage of the first branch 11 of the fixed voltage signal line 10 includes an interference voltage, which can be eliminated by the noise reduction module 20, optionally, a fixed voltage is electrically connected to the second input end 22 of the noise reduction module 20, and the purified voltage is output through the output end 23 of the noise reduction module 20, that is, the voltage is a voltage with influence eliminated, so that the interference factor of the fixed voltage signal in the display panel can be effectively eliminated, and the normal display of each pixel in the display panel is ensured.
Further, fig. 3 is a schematic structural diagram of a pixel driving circuit provided in the present embodiment, fig. 4 is another schematic structural diagram of the driving circuit provided in the present embodiment, please refer to fig. 3 and fig. 4, and refer to fig. 1 and fig. 2, in this embodiment, a PVDD signal line and a PVEE signal line in the pixel driving circuit are taken as an example for explanation, in the pixel driving circuit, the PVDD signal line and the PVEE signal line are provided with voltage signals by a Driver IC or a Power IC, wherein the pixel driving circuit further includes a driving module and a light emitting unit D1, the light emitting unit D1 includes an anode and a cathode (not shown in the figure), the cathode of the light emitting unit D1 is electrically connected to the PVEE signal line, and the anode of the light emitting unit D1 is electrically connected to the light emitting control module, which can also be understood that a voltage difference is formed between a voltage at the PVDD signal line end and a voltage at the PVEE signal line end, and is used for driving the pixel to emit light by a thick solid line in the pixel driving circuit diagram in fig. 3; when the fixed voltage on the PVDD signal line and the fixed voltage on the PVEE signal line are doped with the interference voltage, the voltage difference between the voltage of the PVDD signal terminal and the voltage of the PVEE signal terminal is affected, and the light emission of the light emitting unit D1 is further affected. In the solution of this embodiment, the noise reduction module 20 can eliminate the interference voltage on the PVDD signal line and the PVEE signal line, optionally, the first noise reduction module 24 is connected in series to the PVDD signal line, the second noise reduction module 25 is connected in series to the PVEE signal line, and the voltage output by the output terminal of the first noise reduction module 24 and the voltage output by the output terminal of the second noise reduction module 25 are applied to the pixel driving circuit; thus, the influence of interference voltage can be eliminated; optionally, second input terminals of the first noise reduction module 24 and the second noise reduction module 25 are connected in parallel to a fixed voltage terminal; in the pixel driving circuit, the noise reduction module 20 is introduced, so that the influence of interference voltage can be effectively eliminated, and normal display of the display panel is ensured.
Please refer to fig. 3, wherein the pixel driving circuit is provided with a PVDD signal terminal and a PVEE signal terminal; a driving transistor M0, wherein the grid electrode of the driving transistor M0 is connected to the first node N1, the first pole of the driving transistor M0 is connected to the second node N2, and the second pole of the driving transistor M0 is connected to the third node N3; the anode of the light-emitting unit D1 is connected with the fourth node N4, and the cathode of the light-emitting unit D1 is electrically connected with the PVEE signal end; a light emission control module 70, wherein the light emission control module 70, the driving transistor M0 and the light emitting unit D1 are connected in series between the PVDD signal terminal and the PVEE signal terminal; a first end of the memory module 80 is electrically connected with the PVDD signal end, and a second end of the memory module 80 is electrically connected with the first node N1; the first end of the switch transistor module 90 is connected to the first node N1, and the current flowing through the light emitting unit D1 is further controlled by controlling the turn-on degree of the switch transistor module 90. As will be described in detail below, in the initialization phase, the reference voltage signal is transmitted to the first node N1, so that the driving transistor M0 is turned on; in the data writing stage, the first node N1 is connected to the third node N3, the signal of the data signal terminal Vdata is transmitted to the second node N2, the signal of the second node N2 is transmitted to the third node N3 through the driving transistor M0, and the signal of the third node N3 is transmitted to the first node N1; the storage module 80 is used for charging the first node N1 and maintaining the voltage of the first node N1; in a light emitting stage, the first node N1 and the third node N3 are disconnected, the light emitting control module 70 is turned on, a signal of the PVDD signal terminal is transmitted to the second node N2, the driving transistor M0 generates a driving current for driving the light emitting unit D1 to emit light, and the driving current is transmitted to the anode of the light emitting unit D1 through the light emitting control module 70, so that the light emitting unit D1 emits light; in the above process, if there is an influence of an interference signal on the signals of the PVDD signal terminal and the PVEE signal terminal, the light emitting effect of the light emitting unit D1 is directly influenced, and the noise reduction module 20 is provided in the present application to improve the influence of the interference signal.
It should be noted that the embodiment shown in fig. 1 only schematically shows a schematic diagram of a position relationship between the noise reduction module 20 and the first branch 11 and the second branch 12, where an internal structure of the noise reduction module 20 is not illustrated; the embodiment shown in fig. 2 only schematically shows a schematic diagram of the voltage variation on the fixed-voltage signal line 10, and does not represent the actual voltage on the fixed-voltage signal line 10; the embodiment shown in fig. 3 only schematically shows a structural diagram of the pixel driving circuit, wherein voltage drops of the PVDD signal line and the PVEE signal line are only used as illustrations; the embodiment shown in fig. 4 only schematically shows a structure of the driving circuit for eliminating the interference voltage to the PVDD signal line and the PVEE signal line, wherein the elimination of the interference voltage to the other fixed voltage signal line 10 may be further included.
Referring to fig. 2, in an alternative embodiment of the present application, the interference voltage on the constant voltage signal line 10 is V1, the constant voltage of the first branch 11 is V2, and the constant voltage of the second branch 12 is V = V2-V1.
Specifically, as shown in fig. 2, in the present embodiment, the fixed voltage signal line 10 is used for transmitting the fixed voltage signal, since the driving circuit is in an electrical environment, it is inevitable to overlap the interference signal on the fixed voltage signal line, and if the interference voltage on the fixed voltage signal line 10 is not eliminated, the driving accuracy of the driving circuit is affected; in view of this, the driving circuit in the embodiment can eliminate the interference voltage on the fixed voltage signal line 10, specifically, adopt the operation mode of output signal subtraction; it can be understood that, the noise reduction module 20 is connected in series to the fixed voltage signal line 10, a first branch 11 for processing the interference voltage is located at one side of the input end of the noise reduction module 20, a second branch 12 for processing the interference voltage is located at one side of the output end 23 of the noise reduction module 20, the fixed voltage on the first branch 11 is V2, which includes the interference voltage V1 generated by the electrical environment, and the fixed voltage on the second branch 12 processed by the noise reduction module 20 is V = V2-V1; the noise reduction module 20 in this embodiment adopts a subtraction operation principle to subtract the interference voltage V1 on the first branch 11, that is, to obtain the discharge interference voltage, and may input a signal of the discharge interference voltage to each sub-pixel in the display panel, so as to further ensure a display effect of each pixel in the display panel.
It should be noted that the embodiment shown in fig. 2 only schematically shows a schematic diagram of the variation relationship between V, V1 and V2, and does not represent the actual value of V, V1 and V2.
Referring still to fig. 1, in an alternative embodiment of the present application, the second input terminal 22 of the noise reduction module 20 is electrically connected to the ground terminal.
Specifically, referring to fig. 1, in the present embodiment, the second input terminal 22 of the noise reduction module 20 is electrically connected to the ground terminal, so that the interference voltage caused by the electrical environment can be avoided, and the display effect of each pixel in the display panel can be ensured.
Referring still to fig. 1, in an alternative embodiment of the present application, the noise reduction module 20 is an operational amplifier.
Specifically, referring to fig. 1, in the present embodiment, the noise reduction module 20 selects an operational amplifier, an output signal of the operational amplifier may be a result of mathematical operations such as addition, subtraction, differentiation, and integration of an input signal, and the operational amplifier in the present embodiment adopts a subtraction result, that is, the operational amplifier can subtract the interference voltage, and thus, the influence of the interference signal is removed, and the display effect of each pixel driven by the driving circuit is ensured.
Based on the same inventive concept, the present invention further provides a display module, fig. 5 is a top view of the display module according to the embodiment of the present invention, please refer to fig. 5, the display module 200 includes a driving circuit 100, wherein the driving circuit is the driving circuit 100 according to the embodiment of the present invention.
Please refer to fig. 5, and the display module provided in the embodiment of the present application can refer to the embodiment of the driving circuit, and repeated parts are not repeated. The module that this application provided can embody: any product or component with a real function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
Fig. 6 is a schematic structural diagram of another driving circuit provided in an embodiment of the present application, please refer to fig. 6, in an alternative embodiment of the present application, a display module includes a flexible circuit board 30, and a noise reduction module 20 is bound on the flexible circuit board 30.
Specifically, as shown in fig. 6, in the present embodiment, the display module includes a Flexible Printed Circuit 30 (Flexible Printed Circuit), and the Flexible Circuit 30 is a Printed Circuit board with high reliability and good flexibility; optionally, the display module further includes a display panel 40, the display panel 40 includes a display area and a non-display area, the non-display area is at least partially disposed around the display area, the non-display area includes a binding area 60, optionally, the flexible circuit board is bound to the binding area 60, and the noise reduction module 20 is integrated in the flexible circuit board 30; optionally, the flexible circuit board 30 may be bent to a back side opposite to the light emitting surface of the display panel 40; further, the noise reduction module 20 is integrated on the flexible circuit board 30, optionally, the noise reduction module 20 may be bent to the back of the display panel 40 along with the flexible circuit board 30, so that the space of the binding region 60, which is not required by the display of the display panel 40, can be saved; through the setting of above structure, can realize integrateing the display module assembly that has the module 20 of making an uproar that falls, can realize getting rid of the influence of interference voltage.
It should be noted that the embodiment shown in fig. 6 only schematically shows the position relationship between the display panel 40 and the flexible circuit board 30, and does not represent the actual sizes of the display panel 40 and the flexible circuit board, wherein the noise reduction module 20 shown in fig. 1 may be located at any position of the flexible circuit board, depending on the actual situation.
Continuing to refer to fig. 1, in an alternative embodiment of the present application, noise reduction module 20 is integrated into a tool.
Specifically, please refer to fig. 1, in this embodiment, the noise reduction module 20 is integrated on the tool; optionally, the display module includes a jig, wherein the jig may be a display module device jig, a display module circuit testing jig, a display module bending testing jig, or the like, which is not limited herein; the noise reduction module 20 in this embodiment is disposed on the jig, and the number of selectable positions thereof is large, and is not limited by the structure, so that the disposition positions of the noise reduction module 20 can be enriched, and the optimal integration position of the noise reduction module 20 can be selected according to actual requirements.
Fig. 7 is another schematic structural diagram of a driving circuit provided in an embodiment of the present application, please refer to fig. 7, in an alternative embodiment of the present application, a display module further includes a driving chip 50;
the noise reduction module 20 is integrated on the driving chip 50.
Specifically, with reference to fig. 7, in this embodiment, the display module further includes a driving chip 50, optionally, the display module includes a display panel 40, the display panel 40 includes a display area and a non-display area, the non-display area at least partially surrounds the display area, the non-display area includes a binding area 60, the driving chip 50 is bound on the binding area 60, and the driving chip 50 is configured to provide signals for each signal trace in the display area; optionally, the noise reduction module 20 in this embodiment integrates the driving chip 50, so that the interference voltage signal in the fixed voltage signal line 10 electrically connected to the driving chip 50 can be effectively eliminated, the driving chip 50 is ensured to output an accurate voltage signal, and the display effect of the display panel 40 is ensured.
It should be noted that the embodiment shown in fig. 7 only schematically illustrates the positional relationship between the display panel 40 and the driving chip 50, and does not represent the actual sizes of the display panel 40 and the driving chip 50.
Fig. 8 is a schematic structural diagram of another driving circuit provided in the embodiment of the present application, please refer to fig. 8, in an alternative embodiment of the present application, the display module further includes a bonding region 60, and the noise reduction module 20 is a processing chip;
the display module further includes a driving chip 50, and the driving chip 50 and the noise reduction module 20 are bound in a binding region 60.
Specifically, as shown in fig. 8, the display module according to the present embodiment is bonded in a COG (Chip On Glass) manner, and the driving circuit is directly bonded to the bonding area 60 of the display panel 40. Further explained below, the display module includes the display panel 40, the display panel 40 includes a display area and a non-display area, the non-display area is at least partially arranged around the display area, the non-display area includes the binding area 60, the binding area 60 is bound with the driving chip 50 and the noise reduction module 20, the noise reduction module 20 here can be regarded as a processing chip, bound to the binding area 60, all the fixed voltage signal lines 10 in the display panel 40 can be transmitted to the display area after eliminating the interference voltage signal through the noise reduction module 20, the accuracy of each voltage signal output to the display panel 40 can be improved, and the display effect of the display panel 40 is ensured.
It should be noted that the embodiment shown in fig. 8 only schematically illustrates one positional relationship between the driving chip 50 and the noise reduction module 20, and does not represent actual sizes of the driving chip 50 and the noise reduction module 20, and the driving chip 50 and the noise reduction module 20 may have other positional relationships, which is not limited herein.
Fig. 9 is a schematic structural diagram of another driving circuit provided in an embodiment of the present application, please refer to fig. 9, in an alternative embodiment of the present application, the display module further includes a bonding region 60, and the flexible circuit board 30 is bonded to the bonding region 60; the noise reduction module 20 is a processing chip;
the display module further includes a driving chip 50, and the driving chip 50 and the noise reduction module 20 are bonded on the flexible circuit board 30.
Specifically, as shown in fig. 9, the display module according to the present embodiment is bound by a Chip On Film (COF), and the driver IC is bound to the flexible printed circuit board by a die-on-Film (COF) packaging technique, which is a technique of using a flexible additional circuit board as a package Chip carrier to connect a Chip and a flexible substrate circuit. As will be further described below, the display module includes a display panel 40, the display panel 40 includes a display area and a non-display area, the non-display area at least partially surrounds the display area, the non-display area includes a binding area 60, the binding area 60 is bound with a flexible circuit board 30, optionally, the driving chip 50 and the noise reduction module 20 are bound on the flexible circuit board 30, the noise reduction module 20 herein can be regarded as a processing chip and bound on the flexible circuit board 30, all the fixed voltage signal lines 10 in the display panel 40 can be transmitted to the display area after eliminating the interference voltage signal through the noise reduction module 20, the accuracy of each voltage signal output to the display panel 40 can be improved, and the display effect of the display panel 40 is ensured.
It should be noted that the embodiment shown in fig. 9 only schematically shows one positional relationship among the driver chip 50, the noise reduction module 20 and the flexible circuit board 30, and does not represent actual sizes of the driver chip 50, the noise reduction module 20 and the flexible circuit board 30.
According to the embodiments, the application has the following beneficial effects:
the driving circuit and the display module provided by the application are provided with a fixed voltage signal line, the fixed voltage signal line comprises a first branch and a second branch, and the noise reduction module is connected in series on the fixed voltage signal line, namely the noise reduction module is positioned between the first branch and the second branch; the noise reduction module comprises a first input end electrically connected with the first branch circuit, an output end electrically connected with the second branch circuit, and a second input end electrically connected with a fixed voltage; the voltage of the first branch of the fixed voltage signal line comprises interference voltage, and the interference voltage can be eliminated through the noise reduction module; the second input end of the noise reduction module is electrically connected with a fixed voltage, the purified voltage is output through the output end of the noise reduction module, namely the voltage is the voltage after influence elimination, interference factors of fixed voltage signals in the display panel can be effectively eliminated, and normal display of each pixel in the display panel is ensured.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (8)
1. A driver circuit, comprising:
the fixed voltage signal line comprises a first branch and a second branch;
the noise reduction module is positioned between the first branch and the second branch and comprises a first input end, a second input end and an output end, the first input end is electrically connected with the first branch, the second input end is connected to a grounding end, and the output end is electrically connected with the second branch; the noise reduction module is used for eliminating interference voltage on the fixed voltage signal wire;
the noise reduction module is an operational amplifier;
the noise reduction module comprises a first noise reduction module and a second noise reduction module, the first noise reduction module is connected in series to the PVDD signal line, the second noise reduction module is connected in series to the PVEE signal line, the voltage output by the output end of the first noise reduction module and the voltage output by the output end of the second noise reduction module are applied to the driving circuit, and the second input ends of the first noise reduction module and the second noise reduction module are connected to the ground end in parallel.
2. The driving circuit according to claim 1, wherein the interference voltage on the fixed voltage signal line is V1, the fixed voltage of the first branch is V2, and the fixed voltage of the second branch is V = V1-V2.
3. A display module comprising the driving circuit according to any one of claims 1-2.
4. The display module assembly of claim 3, wherein the display module assembly comprises a flexible circuit board, and the noise reduction module is bonded to the flexible circuit board.
5. The display module of claim 3, wherein the noise reduction module is integrated on a jig.
6. The display module according to claim 3, wherein the display module further comprises a driving chip;
the noise reduction module is integrated on the driving chip.
7. The display module of claim 3, wherein the display module further comprises a bonding area, and the noise reduction module is a processing chip;
the display module further comprises a driving chip, and the driving chip and the noise reduction module are bound in the binding region.
8. The display module assembly of claim 3, further comprising a binding region, wherein the flexible circuit board is bound to the binding region; the noise reduction module is a processing chip;
the display module further comprises a driving chip, and the driving chip and the noise reduction module are bound on the flexible circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111284252.8A CN113990252B (en) | 2021-11-01 | 2021-11-01 | Drive circuit and display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111284252.8A CN113990252B (en) | 2021-11-01 | 2021-11-01 | Drive circuit and display module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113990252A CN113990252A (en) | 2022-01-28 |
| CN113990252B true CN113990252B (en) | 2023-03-10 |
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| CN202111284252.8A Active CN113990252B (en) | 2021-11-01 | 2021-11-01 | Drive circuit and display module |
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| JP6686282B2 (en) * | 2015-03-16 | 2020-04-22 | セイコーエプソン株式会社 | Circuit device, physical quantity detection device, electronic device and moving body |
| CN105987691B (en) * | 2015-03-16 | 2021-02-05 | 精工爱普生株式会社 | Circuit device, physical quantity detection device, electronic apparatus, and moving object |
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| CN113990252A (en) | 2022-01-28 |
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