CN111913328A - Electrostatic protection structure, display panel with electrostatic protection function and display device - Google Patents
Electrostatic protection structure, display panel with electrostatic protection function and display device Download PDFInfo
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- CN111913328A CN111913328A CN201910377023.7A CN201910377023A CN111913328A CN 111913328 A CN111913328 A CN 111913328A CN 201910377023 A CN201910377023 A CN 201910377023A CN 111913328 A CN111913328 A CN 111913328A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136204—Arrangements to prevent high voltage or static electricity failures
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
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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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/0203—Particular design considerations for integrated circuits
- H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection
- H01L27/0251—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices
- H01L27/0292—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices using a specific configuration of the conducting means connecting the protective devices, e.g. ESD buses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/0203—Particular design considerations for integrated circuits
- H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection
- H01L27/0251—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices
- H01L27/0296—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices involving a specific disposition of the protective devices
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/04—Display protection
Abstract
The invention discloses an electrostatic protection structure, a display panel with an electrostatic protection function and a display device. The display panel comprises a color filter substrate and a thin film transistor array substrate which are arranged oppositely, and the color filter substrate and the thin film transistor array substrate are arranged in a plurality of electrostatic protection structures. The electrostatic protection structure can effectively improve the electrostatic protection capability of the display panel, can reduce the static electricity entering the driving circuit board, and effectively prevent the electrostatic damage of the driving circuit board.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to an electrostatic protection structure, a display panel with an electrostatic protection function and a display device.
Background
In recent years, various display panels have been widely used in information communication equipment and general electric equipment. As a flat panel display device, a liquid crystal display panel has been widely used in various aspects of life, such as small-sized smart phones, video cameras, digital cameras, medium-sized notebook computers, desktop computers, large-sized home televisions, large-sized projection devices, and the like, because of its advantages of thin body, power saving, no radiation, and the like. The liquid crystal display panel generally includes an upper substrate, a lower substrate, and a liquid crystal layer between the two substrates. In general, a lower substrate is integrated with a plurality of data lines and scan lines, which are vertically staggered to form a plurality of cell regions, which are defined as pixel cells. Since the liquid crystal display panel is usually densely covered with a large number of wires, the wires are prone to electrostatic accumulation and damage to the panel. Static electricity is ubiquitous from the production to the transportation of liquid crystal display panels, and therefore, effectively preventing static electricity accumulation is crucial to improving the performance of liquid crystal display panels.
At present, there are two types of electrostatic protection methods widely adopted in the industry, one is to prevent the panel from being damaged by static electricity in the environment through a process control method, for example, ion spraying is performed between each process to reduce charge accumulation, and related workers wear an anti-static bracelet, wear shoes and clothes which are not easy to generate static electricity, and the like; the other method is that conductive auxiliary materials are attached to a product surface frame using the liquid crystal panel by a customer to prevent and treat electrostatic damage in the using process. In the two methods, the process control method has certain limitations, only can control the products in the factory, and cannot be continued to the client; and to the condition that the client increases the electrically conductive auxiliary material, because of the restriction of industry development structure, can't increase the auxiliary material on the display device finished product under many circumstances.
Therefore, it becomes critical to enhance electrostatic protection from the panel design itself. At present, the common electrostatic protection method in panel design is to design a bidirectional protection transistor on each data line and scan line, and connect all scan lines and data lines together to establish an electrostatic discharge channel. However, this method has a limited electrostatic protection capability, and the electrostatic protection device may cause new defects if it is damaged by static electricity.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides an electrostatic protection structure, a display panel having an electrostatic protection function, and a display device. The technical problem to be solved by the invention is realized by the following technical scheme:
one aspect of the present invention provides an electrostatic protection structure disposed in a non-display region of a display panel, the electrostatic protection structure including an electrostatic collection unit, an electrostatic discharge unit, and a ground wire, wherein the electrostatic collection unit and the electrostatic discharge unit are disposed opposite to each other and spaced apart from each other, and the electrostatic discharge unit and the ground wire are connected.
In an embodiment of the invention, the static electricity collecting unit is disposed on a lower surface of a color filter substrate of the display panel, and the static electricity leading-out unit and the grounding wire are disposed on an upper surface of a thin film transistor array substrate of the display panel.
In one embodiment of the present invention, a plurality of main spacing units and a plurality of auxiliary spacing units are disposed between the color filter substrate and the thin film transistor array substrate, and a distance between the static electricity collecting unit and the static electricity deriving unit satisfies:
S＜M＜O；
wherein S is a height difference between the main spacing unit and the auxiliary spacing unit, M is a distance between the static electricity collecting unit and the static electricity deriving unit, and O is a distance between upper and lower substrates at a position where the display panel includes a TFT switch.
In one embodiment of the present invention, the electrostatic protection structures are circumferentially distributed in the non-display area.
In an embodiment of the invention, the electrostatic protection structure is disposed inside or outside the sealant of the display panel.
In one embodiment of the present invention, the static electricity collecting unit includes a protrusion structure extending from a lower surface of a color filter substrate of the display panel toward the static electricity lead-out unit.
In one embodiment of the present invention, the static electricity collecting unit includes a padding layer and a conductive layer covering a surface of the padding layer to collect charges on the color filter substrate and transmit the charges to the static electricity deriving unit.
In an embodiment of the invention, the material of the padding layer is the same as at least one of the black matrix layer, the RGB unit, the main spacing unit or the auxiliary spacing unit of the display panel, and the material of the conductive layer is the same as the material of the conductive glass layer of the display panel.
Another aspect of the present invention provides a display panel with an electrostatic protection function, including a color filter substrate and a thin film transistor array substrate that are disposed opposite to each other, where a plurality of electrostatic protection structures described in any one of the foregoing embodiments are disposed between the color filter substrate and the thin film transistor array substrate.
Another aspect of the present invention provides a display device including the display panel with an electrostatic protection function according to the above embodiments.
Compared with the prior art, the invention has the beneficial effects that:
1. the electrostatic protection structure comprises the electrostatic collection unit, the electrostatic lead-out unit and the grounding wire, and can collect and transmit the charges on the display panel to the grounding end to the maximum extent, thereby effectively improving the electrostatic protection capability of the display panel, reducing the static electricity entering the driving circuit board and effectively preventing the electrostatic damage of the driving circuit board.
2. The electrostatic protection structure can be flexibly arranged on the display panel according to the actual design condition, the form is not limited, the arrangement density of the electrostatic protection structure can be properly increased at the part with weaker electrostatic protection, and the use is flexible.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of an electrostatic protection structure according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another ESD protection structure provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another electrostatic protection structure provided in an embodiment of the present invention;
FIG. 4 is a perspective view of an electrostatic protection structure according to an embodiment of the present invention;
FIG. 5 is a perspective view of another electrostatic protection structure provided by an embodiment of the present invention;
FIG. 6 is a perspective view of another electrostatic protection structure provided by an embodiment of the present invention;
fig. 7 is a detailed structural schematic diagram of an electrostatic protection structure according to an embodiment of the present invention;
fig. 8 is a schematic partial structure diagram of a second esd protection unit according to an embodiment of the present invention.
The reference numbers are as follows:
a-a display area; b-a non-display area; 1-an electrostatic protection structure; 101-a static electricity collection unit; 111-a higher-pad layer; 112-a conductive layer; 102-a static electricity deriving unit; 103-ground lead; 2-color filter substrate; 21-a conductive glass layer; 22-black matrix layer; 3-a thin film transistor array substrate; 4-frame glue; 5-a main spacing unit; 6-auxiliary spacing unit; 7-a transmission circuit board; 8-a second electrostatic protection unit; 81-bidirectional protection transistor group; 82-short circuit wire loops; 9-scanning line; 10-a data line; 11-source chip on film; 12-a common voltage line; 13-sub-pixel.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following description, with reference to the accompanying drawings and the detailed description, will be made in detail for an electrostatic protection structure, a display panel with an electrostatic protection function, and a display device according to the present invention.
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings. The technical means and effects of the present invention adopted to achieve the predetermined purpose can be more deeply and specifically understood through the description of the specific embodiments, however, the attached drawings are provided for reference and description only and are not used for limiting the technical scheme of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in the article or device comprising the element.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electrostatic protection structure according to an embodiment of the present invention. As shown in the figure, the electrostatic protection structure 1 includes an electrostatic collecting unit 101, an electrostatic deriving unit 102, and a ground wire 103, wherein the electrostatic collecting unit 101 and the electrostatic deriving unit 102 are disposed opposite to each other and spaced apart from each other by a certain distance, the electrostatic deriving unit 102 is connected to the ground wire 103, and the ground wire 103 is connected to a ground terminal.
Specifically, the static electricity collecting unit 101 includes a discharge tip for collecting charges on the color filter substrate 2 and transmitting the charges to the static electricity deriving unit 102, and the static electricity deriving unit 102 transmits the static electricity to the ground terminal through the ground wire 103.
In general, a display panel is provided with a lot of circuit structures and wirings, and static electricity may be generated on the surface of the display panel due to the influence of factors such as environment, and the generated static electricity may damage circuits inside the display panel and other components in the display device, thereby affecting the service life of the display panel. In order to solve the technical problem that static electricity generated on the surface of the display panel may damage the internal circuits of the display panel and other components in the display device, thereby affecting the service life of the display panel, in the embodiment, a plurality of static electricity protection structures 1 are disposed between the color filter substrate 2 and the thin film transistor array substrate 3, for providing static electricity protection to the display panel.
The electrostatic protection structure 1 of the present embodiment performs electrostatic protection according to the tip discharge principle, wherein the electrostatic collecting unit 101 may be a conductive block with a tip structure, and the electrostatic deriving unit 102 may be a conductive sheet. At the moment of striking the display panel by static electricity, the static electricity collecting unit 101 concentrates the charges to the discharging tip, and a certain distance exists between the discharging tip and the static electricity leading-out unit 102, so that the charges concentrated on the color filter substrate 2 are released to the static electricity leading-out unit 102 through the discharging tip, and then the charges are transmitted to the grounding end through the grounding wire 103, thereby effectively improving the static electricity protection capability of the display panel and effectively preventing the display panel from being damaged by static electricity.
In the present embodiment, the static electricity collecting unit 101 is disposed on the lower surface of the color filter substrate 2 of the display panel, the static electricity leading-out unit 102 is disposed on the upper surface of the thin film transistor array substrate 3 of the display panel, and the ground wire 103 is wired in the edge non-display region of the thin film transistor array substrate 3.
In addition, the display panel includes a display area a and a non-display area B located around the display area a. In this embodiment, the electrostatic protection structure 1 is disposed in the non-display region B of the display panel, that is, the electrostatic collecting unit 101, the electrostatic deriving unit 102 and the ground wire 103 are all located in the non-display region B, so that the normal display of the display panel is not affected.
Further, the display panel comprises a color filter substrate 2 and a thin film transistor array substrate 3 which are arranged oppositely, a liquid crystal layer is filled between the color filter substrate 2 and the thin film transistor array substrate 3, and the electrostatic protection structure 1 is arranged between the color filter substrate 2 and the thin film transistor array substrate 3 and circumferentially distributed around the liquid crystal layer. Referring to fig. 2, fig. 2 is a schematic structural diagram of another electrostatic protection structure according to an embodiment of the present invention. In general, the edges of the color filter substrate 2 and the thin film transistor array substrate 3 are bonded by the sealant 4 to prevent the liquid crystal molecules in the liquid crystal layer from leaking. When mass production of liquid crystal display panels is performed, generally, the color filter substrate 2 and the thin film transistor array substrate 3 are independently manufactured, and then aligned and bonded by the sealant 4, and the electrostatic protection structure 1 is located inside the sealant 4, that is, after aligned and bonded, the electrostatic protection structure 1 is encapsulated inside the sealant 4. In the present embodiment, the discharge tip of the static electricity collecting unit 101 is a convex structure extending from the lower surface of the color filter substrate 2 of the display panel to the static electricity deriving unit 102.
In addition, referring to fig. 3, fig. 3 is a schematic structural diagram of another electrostatic protection structure according to an embodiment of the present invention. As shown in the figure, in other embodiments, the electrostatic protection structure 1 may also circumferentially surround the frame glue 4.
Referring to fig. 4, fig. 4 is a perspective view illustrating an electrostatic discharge protection structure according to an embodiment of the present invention. In the present embodiment, the bottom surface of the electrostatic collecting unit 31 contacting the color filter substrate 1 is circular, the diameter of the circular bottom surface is preferably 80-120 μm, the electrostatic charge concentration effect of the circular electrostatic collecting unit 31 is prominent, the alignment between the electrostatic collecting unit 101 and the electrostatic deriving unit 102 is flexible, the process is flexible, and the electrostatic transmission effect is optimal. Of course, the shape is not limited to a circle, and any shape of tip may be used. The plurality of electrostatic collecting units 101 are enclosed in a rectangular configuration at the lower surface edge of the color filter substrate 2. Preferably, the pitch of the adjacent electrostatic collecting units 101 is preferably 400-.
It is to be noted that the distribution pitches of the adjacent electrostatic collecting units 101 of the electrostatic protection structure of the present embodiment on the display panel may be the same or different, and may be flexibly arranged according to the actual design condition, and the setting density of the electrostatic protection structure may be properly increased at the portion of the display panel with weaker electrostatic protection, so as to reduce the electrostatic damage of the entire display panel.
For example, referring to fig. 5, fig. 5 is a distributed perspective view of another electrostatic protection structure according to an embodiment of the present invention. In the drawing, the lower surfaces of the plurality of static electricity collecting units 101 may have a block-like structure uniformly distributed in the non-display area B in the circumferential direction. Preferably, the bottom surface of the block structure has a length of 400-600 μm and a width of 80-120 μm, and the electrostatic collecting unit 101 is configured as a block structure, which is helpful for increasing the area of the tip, the more the electrostatic charge concentration effect is prominent, the more flexible the alignment between the electrostatic collecting unit and the electrostatic deriving unit, the more flexible the process, and the best electrostatic transmission effect. Of course, the shape is not limited to rectangular block shape, and any shape of tip can be used. And the plurality of electrostatic collecting units 101 enclose a rectangular structure along the length direction, and the distance between adjacent electrostatic collecting units 101 is preferably 400-600 μm, so as to ensure that the transition region between each electrostatic collecting unit 101 is longer, each tip is independent, the tip protrusion is optimal, and the electrostatic concentration effect is better.
Further, referring to fig. 6, fig. 6 is a distributed perspective view of another electrostatic protection structure according to an embodiment of the present invention. In other embodiments, the plurality of electrostatic collecting units 101 may be configured as an integral annular protrusion structure, and an entire annular electrostatic receiving unit may be configured at a corresponding position on the tft array substrate, or may be configured as a plurality of small electrostatic receiving units separately, and finally connected to the ground terminal.
The shapes and the distributions of the static electricity collecting unit 101 and the static electricity deriving unit 102 of the present invention are not limited, and any shapes and distributions of the static electricity collecting unit 101 and the static electricity deriving unit 102 that can realize the tip discharge are within the protection scope of the present invention.
Further, in the present embodiment, the ground wire 103 connects all the static electricity derivation units 102 in series and is electrically connected to the ground port on the transmission circuit board, so that the static electricity collected by all the static electricity collection units 101 is conducted to the ground through the ground port. Of course, in other embodiments, the grounding wires 103 connected to each of the static electricity discharge units 102 may not be connected to each other, as long as they are electrically connected to the grounding ports, respectively, and the invention is not limited thereto.
In addition, the display panel is connected to the transmission circuit board 7 through a plurality of source flip-chip films 11, a plurality of driving chips for driving the display panel are generally disposed on the transmission circuit board 7, here, a ground port (not shown in the drawings) is disposed on the transmission circuit board 7, the ground wire 103 is connected to the ground port through the source flip-chip films 11 and the transmission circuit board 7, and can be grounded through the ground port to discharge static electricity in the display panel to the ground.
The electrostatic protection structure of the embodiment comprises the electrostatic collection unit, the electrostatic lead-out unit and the grounding wire, and can collect and transmit the charges on the display panel to the grounding end to the utmost extent, thereby effectively improving the electrostatic protection capability of the display panel, reducing the static electricity entering the driving circuit board and effectively preventing the electrostatic damage of the driving circuit board.
Example two
On the basis of the above embodiments, the present embodiment further describes a specific structure of the electrostatic protection structure 1.
Specifically, referring to fig. 7, fig. 7 is a detailed structural schematic diagram of an electrostatic protection structure according to an embodiment of the present invention. In the present embodiment, the electrostatic charge collecting unit 101 is disposed on the lower surface of the color filter substrate 2, and includes a raised layer 111 and a conductive layer 112 covering the raised layer 111. After the color filter substrate 2 and the thin film transistor array substrate 3 are bonded, a certain distance exists between the color filter substrate 2 and the thin film transistor array substrate 3, and the electrostatic collecting unit 101 and the electrostatic discharge leading-out unit 102 need to meet a certain distance condition for generating point discharge, so the electrostatic collecting unit 101 includes a raised layer 111, one end of the raised layer 111 is connected to the lower surface of the color filter substrate 2, and the other end forms a discharge point and extends out towards the electrostatic discharge leading-out unit 102. The high padding layer 111 may be made of an insulating material, such as a non-metallic material.
A conductive layer 112 is covered on the outer surface of the step-up layer 111, and the conductive layer 112 is made of a conductive material and is used for collecting charges on the color filter substrate 2 and transmitting the charges to the static electricity derivation unit 102. In the present embodiment, the thickness of the conductive layer 112 is preferably 0.6 μm, and the conductive layer 112 is thin and transparent, and has high transmittance and less influence on the color difference of the display.
Further, the lower surface of the color filter substrate 2 is sequentially provided with a conductive glass layer 21 and a black matrix layer 22, wherein the padding layer 111 and at least one of the black matrix layer 22, the RGB unit, the main spacing unit 5 or the auxiliary spacing unit 6 of the display panel are arranged in the same layer and have the same material; the conductive layer 112 and the conductive glass layer 21 are preferably disposed in the same layer and made of the same material. In the present embodiment, the padding layer 111 is disposed on the same layer as the R color filter sub-units in the RGB unit, specifically, in the process of preparing the color filter substrate 2, the RGB units arranged alternately are prepared on the lower surface of the color filter substrate 2, a plurality of padding layers 111 are prepared on the R color filter sub-units located in the non-display region of the color filter substrate 2 at the same time, and then, a conductive glass is disposed on the R color filter sub-units including the plurality of padding layers 111, and the conductive glass layer 21 and the conductive layer 112 are formed at the same time. Since the heightening layer 111 of this embodiment is prepared by stacking materials layer by layer, in the preparation process, a single material may be selected for stacking, such as the R color filter subunit material described in this embodiment, or several different materials may be selected for stacking in sequence, for example, when preparing an RGB unit, the R subunit material, the G subunit material, and the B subunit material are sequentially stacked at corresponding positions, and finally, the heightening layer 111 is formed.
In other embodiments, the static electricity collecting unit 101 may be formed separately on the lower surface of the color filter substrate 2, for example, after the color filter substrate 2 is formed, the step-up layer 111 and the conductive layer 112 covering the step-up layer 111 are sequentially formed on the lower surface of the color filter substrate 2. In addition, the padding layer 111 may also be made of other non-metal materials, and the conductive layer 112 may also be made of other metal materials, which is not limited herein.
In addition, it should be noted that the raised layer 111 of the present embodiment is only used to make the static electricity collecting unit 101 reach a certain height, and in other embodiments, the static electricity collecting unit 101 may not include the raised layer 111, but may be directly formed into a convex structure by using a conductive material.
Further, the static electricity derivation unit 102 and the ground wiring 103 are provided on the upper surface of the thin film transistor array substrate 3. The static electricity derivation unit 102 is made of a conductive material, and is vertically opposed to the static electricity collection unit 101. In the present embodiment, the static electricity leading-out unit 102 and the conductive glass layer 21 are preferably made of the same material and are prepared by the same preparation process.
Further, a plurality of main spacers 5 and a plurality of auxiliary spacers 6 are disposed between the color filter substrate 2 and the thin film transistor array substrate 3, wherein both ends of the main spacers 5 are supported on the color filter substrate 2 and the thin film transistor array substrate 3, respectively; one end of the plurality of auxiliary spacers 6 is supported on the color filter substrate 2 and the other end is spaced apart from the thin film transistor array substrate 3. Specifically, the main spacer 5 and the auxiliary spacer 6 are used to support the display panel, and the main spacer 5 and the auxiliary spacer 6 have a columnar structure having a dielectric constant lower than that of the liquid crystal layer. Normally, the main spacer 5 is supported between the color filter substrate 2 and the thin film transistor array substrate 3 to play a supporting role, and the length of the auxiliary spacer 6 is smaller than the normal interval between the color filter substrate 2 and the thin film transistor array substrate 3 to play no supporting role. When the display panel is squeezed due to external force, the distance between the color filter substrate 2 and the thin film transistor array substrate 3 is reduced, when the distance is reduced to the thickness of the auxiliary spacer 6, the auxiliary spacer 6 starts to play a supporting role, and the squeezing damage of the display panel can be effectively prevented through the combined action of the main spacer 5 and the auxiliary spacer 6.
In the present embodiment, the distance M between the static electricity collecting unit 101 and the static electricity deriving unit 102 satisfies:
S＜M＜O；
wherein S is a height difference between the main spacing unit 5 and the auxiliary spacing unit 6, M is a distance between the static electricity collecting unit 31 and the static electricity deriving unit 32, and O is a distance between the upper and lower substrates of the display panel including the TFT switch.
S < M indicates that: even when the display panel is subjected to the pressing force, the static electricity collecting unit 101 cannot be brought into contact with the static electricity discharge static electricity 102, and M cannot be equal to 0 in any case and should be larger than 0 to meet the demand for generating the point discharge.
M < O shows that some higher places exist in the display panel, a certain static electricity receiving effect originally exists, and the positions of the static electricity receiving effect and the static electricity leading-out unit 102 are in the positions with the minimum distance in the panel due to the fact that the positions of the static electricity receiving effect and the static electricity leading-out unit are in the display area, so that static electricity charges can be gathered at the positions of the convex structures of the static electricity collecting unit 101, the static electricity receiving effect at the positions, close to the upper substrate and the lower substrate, in the display area is reduced, and the display area is prevented from being damaged by static electricity.
In the embodiment, the static electricity collecting unit formed by the higher padding layer and the conductive layer is beneficial to collecting static electricity and improving the static electricity collecting efficiency. In addition, the padding layer and any one of the black matrix layer, the RGB unit, the main spacing unit or the auxiliary spacing unit of the display panel are arranged on the same layer and are made of the same material, the conducting layer and the conducting glass layer are arranged on the same layer and are made of the same material, the black matrix layer and the conducting glass layer can be prepared simultaneously when being prepared respectively, an additional preparation process is not needed, and the cost is low.
EXAMPLE III
In this embodiment, a display panel having an electrostatic protection function is described with emphasis on the above embodiments.
Specifically, the display panel includes a color filter substrate 2 and a thin film transistor array substrate 3 which are oppositely disposed, and a plurality of electrostatic protection structures 1 described in the above embodiments are disposed between the color filter substrate 2 and the thin film transistor array substrate 3. The electrostatic protection structure 1 has already been described in detail in the foregoing embodiments, and is not described herein again. The display panel may further include a display area a and a non-display area B located around the display area a, wherein the liquid crystal molecules are distributed in the display area a, and a plurality of the electrostatic protection structures 1, i.e., the electrostatic collection unit 101, the electrostatic derivation unit 102, and the ground wire 103 are located in the non-display area B, so that normal display of the display panel is not affected. In addition, the static electricity collecting unit 101 may be disposed on a lower surface of the color filter substrate 2 of the display panel, the static electricity lead-out unit 102 may be disposed on an upper surface of the thin film transistor array substrate 3 of the display panel, and the ground wire 103 is wired in an edge non-display region of the thin film transistor array substrate 3.
Optionally, in this embodiment, the display panel may further include a second electrostatic protection unit 8, where the second electrostatic protection unit 8 is disposed between the color filter substrate 2 and the thin film transistor array substrate 3 and on the upper surface of the thin film transistor array substrate 3, and is used to provide further electrostatic protection for the display panel. Among them, the second electrostatic protection unit 8 is preferably disposed between the aforementioned electrostatic protection structure 1 and the display area a of the display panel.
Referring to fig. 8, fig. 8 is a schematic partial structure diagram of a second esd protection unit according to an embodiment of the present invention. The second electrostatic protection unit 8 includes a short circuit wire loop 82 and a plurality of bidirectional protection transistor groups 81, the plurality of bidirectional protection transistor groups 81 are respectively connected to the scan lines 9 or the data lines 10 of the display panel, and the short circuit wire loop 82 is connected to each bidirectional protection transistor group 81.
In this embodiment, a bidirectional protection transistor group 81 is connected to the front end of each scan line 9 and each data line 10, each bidirectional protection transistor group 81 includes a first transistor, a second transistor, a third transistor and a fourth transistor, wherein the gates of the first transistor, the second transistor, the third transistor and the fourth transistor are simultaneously connected to the scan line 9 or the data line 10; the sources of the first transistor and the second transistor are simultaneously connected with the scanning line 9 or the data line 10, and the drains are connected with the short-circuit wire ring 82; the drains of the third transistor and the fourth transistor are connected to the scanning line 9 or the data line 10 at the same time, and the sources are connected to the short-circuit wire loop 82.
In practical use, when a large voltage is applied to the scan line 9 or the data line 10, whether positive or negative, a set of transistors in forward or reverse direction will conduct current to the short circuit wire loop 82, the short circuit wire loop 82 is actually a ring electrode surrounding the non-display area of the periphery of the pixel array, the ring electrode crosses each scan line and data line to generate a parasitic capacitance at each crossing, and the data lines and the scan lines are connected in parallel to form a large capacitance for accommodating the charges of the electrostatic discharge to reduce the electrostatic voltage, thereby preventing electrostatic damage.
Referring to fig. 5 and 6, the tft array substrate 3 is provided with a plurality of scan lines 9 parallel to each other, a plurality of common voltage lines 12 parallel to the scan lines 9, a plurality of data lines 10 parallel to each other and intersecting the scan lines 9 in a vertical insulating manner, and a plurality of sub-pixels 13 located in a region where the scan lines 9 and the data lines 10 intersect vertically, wherein the plurality of sub-pixels 13 are located in the display region a. Further, the plurality of scanning lines 9 and the plurality of common voltage lines 12 are preferably arranged in equal numbers and in parallel at intervals, and each bidirectional protection transistor group 81 is connected to the leading end of each scanning line 9 and each data line 10, respectively.
The display panel of the invention is provided with the second electrostatic protection structure which is matched with the electrostatic protection structure in the embodiment for use, so that the electrostatic protection capability of the display panel can be further improved.
It should be further noted that the display panel of the embodiment may be, for example, a component for displaying in products such as electronic paper, a tablet computer, a liquid crystal display, a liquid crystal television, a digital photo frame, and a mobile phone.
In addition, the embodiment of the invention also provides a display device, which comprises a driving device and the display panel in the embodiment, wherein the display panel is electrically connected with the driving device, and the driving device is used for driving the display panel and controlling the display state of the display panel. The display device may be any product or component having a display function, such as a liquid crystal display device, electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, and a navigator.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. An electrostatic protection structure (1) disposed in a non-display region (B) of a display panel, wherein the electrostatic protection structure (1) comprises an electrostatic collection unit (101), an electrostatic derivation unit (102), and a ground line (103), wherein the electrostatic collection unit (101) and the electrostatic derivation unit (102) are disposed opposite to each other and spaced apart from each other, and the electrostatic derivation unit (102) and the ground line (103) are connected.
2. The electrostatic protection structure (1) according to claim 1, wherein the electrostatic collection unit (101) is disposed on a lower surface of a color filter substrate (2) of a display panel, and the electrostatic derivation unit (102) and the ground wire (103) are disposed on an upper surface of a thin film transistor array substrate (3) of the display panel.
3. The electrostatic protection structure (1) according to claim 2, wherein a plurality of main spacing units (5) and a plurality of auxiliary spacing units (6) are disposed between the color filter substrate (2) and the thin film transistor array substrate (3), and a distance between the electrostatic collection unit (101) and the electrostatic derivation unit (102) satisfies:
S＜M＜O；
wherein S is the height difference between the main spacing unit (5) and the auxiliary spacing unit (6), M is the distance between the static electricity collection unit (101) and the static electricity derivation unit (102), and O is the distance between the upper and lower substrates of the display panel at the position containing the TFT switch.
4. The electrostatic protection structure (1) according to claim 1, wherein the electrostatic protection structure (1) is circumferentially distributed within the non-display area (B).
5. The electrostatic protection structure (1) according to claim 1, wherein the electrostatic protection structure (1) is disposed inside or outside the sealant (4) of the display panel.
6. The electrostatic protection structure (1) according to claim 1, wherein the electrostatic collection unit (101) comprises a protruding structure extending from a lower surface of a color filter substrate (2) of a display panel towards the electrostatic derivation unit (102).
7. The electrostatic protection structure (1) according to claim 1, wherein the electrostatic collection unit (101) comprises a padding layer (111) and a conductive layer (112), wherein the conductive layer (112) covers the surface of the padding layer (111) to collect the charges on the color filter substrate (2) and transmit the charges to the electrostatic derivation unit (102).
8. The electrostatic protection structure (1) according to claim 7, wherein the padding layer (111) is made of the same material as at least one of the black matrix layer (22), the RGB units, the main spacing units (5) or the auxiliary spacing units (6) of the display panel, and the conductive layer (112) is made of the same material as the conductive glass layer (21) of the display panel.
9. A display panel with electrostatic protection function, comprising a color filter substrate (2) and a thin film transistor array substrate (3) which are oppositely arranged, wherein a plurality of electrostatic protection structures (1) as claimed in any one of claims 1 to 8 are arranged between the color filter substrate (2) and the thin film transistor array substrate (3).
10. A display device having an electrostatic protection function, comprising the display panel according to claim 9.
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| CN111913328B (en) | 2022-11-18 |
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