Antistatic display device
By providing an electrostatic conductive film on the surface of the array substrate and connecting the conductive member to the ground circuit of the driving motherboard, the electrostatic problem of color film substrates in the prior art is solved, and the anti-static ability is significantly improved.
Patent Information
- Application Number
- CN202420758579.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-04-12
Smart Images
Figure CN222784758U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the display field, in particular to an antistatic display device. Background Art
[0002] The liquid crystal panel includes a color filter substrate and an array substrate arranged opposite to each other, and a liquid crystal material is filled between the color filter substrate and the array substrate. Since the color filter substrate is the display side of the liquid crystal panel, it often contacts with external objects such as fingers and accumulates static electricity. In the prior art, in order to solve the static electricity problem of the color filter substrate, a layer of ITO film or high resistance film is arranged on the upper surface of the color filter substrate, and then silver paste is applied between the color filter substrate and the array substrate, so that the ITO film or high resistance film on the color filter substrate is overlapped to the ground PAD of the array substrate through the silver paste, and then grounded through the external circuit of the array substrate, thereby releasing the static electricity accumulated on the color filter substrate.
[0003] However, since the color filter substrate is smaller in size than the array substrate, the area of the upper surface that can be covered by the ITO film or the high-resistance film is small, and the anti-static ability is still insufficient for some projects with high anti-static requirements. At the same time, the upper surface of the color filter substrate must also be attached to the upper polarizer, and the ITO film or the high-resistance film needs to be exposed from the periphery of the upper polarizer to contact the silver paste, and the peripheral area of the color filter substrate is small, resulting in a small contact area between the ITO film or the high-resistance film and the silver paste, which also limits the anti-static ability. Utility Model Content
[0004] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides an antistatic display device with high antistatic capability.
[0005] The technical problem to be solved by the utility model is achieved through the following technical solutions:
[0006] An anti-static display device comprises a metal casing and a liquid crystal panel, a backlight module and a driving mainboard arranged in the metal casing, wherein the liquid crystal panel comprises a color film substrate and an array substrate arranged opposite to each other; the array substrate is larger than the color film substrate and is arranged as the display side of the liquid crystal panel and facing away from the backlight module, and a static conductive film is arranged on a surface of the array substrate facing away from the color film substrate; the anti-static display device further comprises a first conductive member and a second conductive member, wherein the first conductive member is electrically connected between the static conductive film and the metal casing, and the second conductive member is electrically connected between the metal casing and the driving mainboard.
[0007] Furthermore, the static conductive film is an ITO film or a high resistance film.
[0008] Furthermore, the array substrate includes an overlapping area corresponding to the color filter substrate, and an epitaxial area extending outside the color filter substrate; the liquid crystal panel also includes an upper polarizer arranged on the surface of the array substrate facing away from the color filter substrate, and a lower polarizer arranged on the surface of the color filter substrate facing away from the array substrate; the upper polarizer at least covers the display area of the array substrate and avoids the epitaxial area of the array substrate, so that the portion of the electrostatic conductive film located on the epitaxial area is exposed from the periphery of the upper polarizer and contacts with the first conductive member.
[0009] Furthermore, the first conductive member is a conductive adhesive material, and the static conductive film and the metal casing are bonded and fixed together by the first conductive member.
[0010] Furthermore, the first conductive member is conductive foam or conductive double-sided adhesive.
[0011] Furthermore, the second conductive member is a conductive elastic material, and the metal housing and the driving mainboard are in contact with each other through the second conductive member.
[0012] Furthermore, the second conductive member is a conductive rubber pad or a conductive silicone pad.
[0013] Furthermore, the backlight module extends a plurality of positioning posts toward the metal casing, the metal casing extends a plurality of positioning hole posts toward the backlight module, the driving mainboard is provided with a plurality of positioning holes, the positioning posts, positioning hole posts and positioning holes correspond one to one, each of the positioning posts passes through the corresponding positioning hole and is embedded in the corresponding positioning hole post; the conductive rubber pad or the conductive silicone pad is sleeved on the positioning post.
[0014] Furthermore, the backlight module extends a plurality of positioning posts toward the metal casing, the metal casing extends a plurality of positioning hole posts toward the backlight module, the driving mainboard is provided with a plurality of positioning holes, the positioning posts, positioning hole posts and positioning holes correspond one to one, each of the positioning posts passes through the corresponding positioning hole and is embedded in the corresponding positioning hole post; the conductive rubber pad or the conductive silicone pad is sleeved outside the positioning post between the driving mainboard and the metal casing.
[0015] Furthermore, the driving mainboard is electrically connected to the liquid crystal panel via a flexible circuit board.
[0016] The utility model has the following beneficial effects: the anti-static display device of the utility model sets the liquid crystal panel upside down, the color film substrate of the liquid crystal panel serves as the light incident side, and is set toward the backlight module, while the array substrate of the liquid crystal panel serves as the display side, and is set away from the backlight module, and then the static conductive film is set on the surface of the array substrate, and the static conductive film is electrically connected to the driving mainboard through the first conductive part, the metal casing and the second conductive part in sequence, and finally the static electricity conducted outward by the static conductive film is grounded through the grounding circuit of the driving mainboard; since the array substrate is larger than the color film substrate, compared with the prior art in which the static conductive film is set on the surface of the color film substrate, the utility model sets the static conductive film on the surface of the array substrate, which can increase the area of the static conductive film and the contact area between the static conductive film and the first conductive part to enhance the anti-static ability. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the stacking structure of the anti-static display device provided by the utility model.
[0018] Figure 2 for Figure 1 A partial enlarged view of point A in the anti-static display device shown. DETAILED DESCRIPTION
[0019] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0020] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0021] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example
[0023] like Figure 1 and 2 As shown, an anti-static display device includes a metal casing 100 and a liquid crystal panel 200, a backlight module 300 and a driving mainboard 400 arranged in the metal casing 100, the liquid crystal panel 200 includes a color film substrate 210 and an array substrate 220 arranged opposite to each other; the array substrate 220 is larger than the color film substrate 210, and is arranged as the display side of the liquid crystal panel 200 and facing away from the backlight module 300, and a static conductive film 230 is arranged on a surface of the array substrate 220 facing away from the color film substrate 210; the anti-static display device also includes a first conductive member 500 and a second conductive member 600, the first conductive member 500 is electrically connected between the static conductive film 230 and the metal casing 100, and the second conductive member 600 is electrically connected between the metal casing 100 and the driving mainboard 400.
[0024] The anti-static display device of the utility model sets the liquid crystal panel 200 upside down, the color film substrate 210 of the liquid crystal panel 200 is used as the light incident side, and is set toward the backlight module 300, and the array substrate 220 of the liquid crystal panel 200 is used as the display side, and is set away from the backlight module 300, and then the static conductive film 230 is set on the surface of the array substrate 220, and the static conductive film 230 is electrically connected to the driving mainboard 400 through the first conductive member 500, the metal housing 100 and the second conductive member 600 in sequence. The static electricity conducted outward by the static conductive film 230 is finally grounded through the grounding circuit of the driving main board 400; since the array substrate 220 is larger than the color film substrate 210, compared with the prior art in which the static conductive film 230 is disposed on the surface of the color film substrate 210, the utility model disposes the static conductive film 230 on the surface of the array substrate 220, which can increase the area of the static conductive film 230 and the contact area between the static conductive film 230 and the first conductive member 500, so as to enhance the anti-static ability.
[0025] The liquid crystal panel 200 controls light transmission based on the optical rotation of the liquid crystal material, and the user's viewing direction will not affect the light transmission of the liquid crystal panel 200. That is to say, no matter whether the liquid crystal panel 200 adopts the array substrate 220 as the display side or the color film substrate 210 as the display side, it can transmit light normally for display; however, since the liquid crystal panels 200 in the prior art all adopt the color film substrate 210 as the display side, the liquid crystal panel 200 of the utility model, after adopting the array substrate 220 as the display side, needs to perform a left-right mirror inversion processing on the pixel addressing data during display driving, that is, the addressing data of the first column of pixels in the display screen should be mapped to the penultimate column of pixels in the liquid crystal panel 200, and the addressing data of the second column of pixels in the display screen should be mapped to the penultimate column of pixels in the liquid crystal panel 200, and so on, so as to avoid the display screen seen by the user being a mirror image of the normal screen.
[0026] In this embodiment, the electrostatic conductive film 230 can be but is not limited to an ITO film or a high-resistance film. The ITO film is usually used in a liquid crystal panel 200 using an external touch screen, such as an OGS panel, a GG panel, etc., and the high-resistance film is usually used in a liquid crystal panel 200 using an integrated touch screen, such as an In-cell panel, an On-cell panel, etc.
[0027] The metal casing 100 has an assembly cavity and a window opening. The liquid crystal panel 200, the backlight module 300 and the driving main board 400 are arranged in the assembly cavity of the metal casing 100. The liquid crystal panel 200 corresponds to the window opening of the metal casing 100. The backlight module 300 is arranged on a side surface of the liquid crystal panel 200 that is opposite to the window opening. The driving main board 400 is arranged on a side surface of the backlight module 300 that is opposite to the liquid crystal panel 200.
[0028] The array substrate 220 includes an overlapped area corresponding to the color filter substrate 210 and an epitaxial area extending outside the color filter substrate 210 . A binding area is provided on the epitaxial area, and a driving chip 260 and a flexible circuit board 270 are bound to the binding area.
[0029] The reason why the area of the array substrate 220 is larger than that of the color filter substrate 210 is that the array substrate 220 needs to extend outward from the color filter substrate 210 to have an epitaxial region for binding the driver chip 260 and the flexible circuit board 270, and the epitaxial region is also used for routing connection lines between pixels and the driver chip 260 and the flexible circuit board 270.
[0030] The electrostatic conductive film 230 is arranged on the entire surface of the array substrate 220, and covers the overlapping area and the epitaxial area of the array substrate 220. In the prior art, the electrostatic conductive film 230 is arranged on the surface of the color filter substrate 210, and its area is only equivalent to the overlapping area of the array substrate 220.
[0031] The driving mainboard 400 is electrically connected to the liquid crystal panel 200 through the flexible circuit board 270 .
[0032] The liquid crystal panel also includes an upper polarizer 240 arranged on the surface of the array substrate 220 facing away from the color film substrate 210, and a lower polarizer 250 arranged on the surface of the color film substrate 210 facing away from the array substrate 220; the upper polarizer 240 at least covers the display area of the array substrate 220 and avoids the epitaxial area of the array substrate 220, so that the portion of the electrostatic conductive film 230 located on the epitaxial area is exposed from the periphery of the upper polarizer 240 and contacts the first conductive member 500.
[0033] Since the overlapped area of the array substrate 220 includes the display area thereof, the upper polarizer 240 may also cover the entire overlapped area of the array substrate 220 .
[0034] In this embodiment, the upper polarizer 240 only covers the display area of the array substrate 220 , but considering the lamination tolerance problem, each side of the upper polarizer 240 exceeds the corresponding side of the display area by about 0.5 mm.
[0035] The first conductive member 500 is a conductive adhesive material. In addition to achieving electrical conduction through the first conductive member 500 , the static conductive film 230 and the metal housing 100 are also bonded and fixed to each other through the first conductive member 500 .
[0036] In this embodiment, the first conductive member 500 may be, but is not limited to, conductive foam or conductive double-sided adhesive.
[0037] The second conductive member 600 is made of conductive elastic material. In addition to achieving electrical conduction between the metal housing 100 and the driving mainboard 400 through the second conductive member 600, the metal housing 100 and the driving mainboard 400 are in contact with each other through the second conductive member 600 to achieve vibration buffering between the two.
[0038] In this embodiment, the second conductive member 600 may be, but is not limited to, a conductive rubber pad or a conductive silicone pad.
[0039] The backlight module 300 extends a plurality of positioning posts 310 toward the metal casing 100, and the metal casing 100 extends a plurality of positioning hole posts 130 toward the backlight module 300. The driving mainboard 400 is provided with a plurality of positioning holes 410. The positioning posts 310, the positioning hole posts 130 and the positioning holes 410 correspond one to one. Each of the positioning posts 310 passes through the corresponding positioning hole 410 and is embedded in the corresponding positioning hole post 130. The conductive rubber pad or the conductive silicone pad is sleeved outside the positioning posts 310 between the driving mainboard 400 and the metal casing 100.
[0040] The metal housing 100 includes a metal upper housing 110 and a metal lower housing 120 that are relatively assembled. The metal upper housing 110 includes a housing top surface 111 and a first housing side wall 112 connected to the periphery of the housing top surface 111. The metal lower housing 120 includes a housing bottom surface 121 and a second housing side wall 122 connected to the periphery of the housing bottom surface 121. The metal upper housing 110 and the metal lower housing 120 are relatively assembled and fixed by the first housing side wall 112 and the second housing side wall 122 to form the metal housing 100.
[0041] The assembly cavity of the metal housing 100 is located between the metal upper housing 110 and the metal lower housing 120, the window opening of the metal housing 100 is opened in the housing top surface 111 of the metal upper housing 110, and the positioning hole column 130 of the metal housing 100 is arranged on the housing bottom surface 121 of the metal lower housing 120. The electrostatic conductive film 230 is electrically connected to the bottom of the housing top surface 111 of the metal upper housing 110 through the first conductive member 500.
[0042] A split assembly structure may be adopted between the metal upper shell 110 and the metal lower shell 120, that is, the metal upper shell 110 and the metal lower shell 120 are assembled and fixed by means of snap connection, magnetic connection or glue bonding, and this type of assembly and fixing method can disassemble and separate the metal upper shell 110 and the metal lower shell 120 in a later stage; an integrated assembly structure may also be adopted between the metal upper shell 110 and the metal lower shell 120, that is, the metal upper shell 110 and the metal lower shell 120 are assembled and fixed by means of heating welding, ultrasonic welding, etc., and this type of assembly and fixing method cannot disassemble and separate the metal upper shell 110 and the metal lower shell 120 in a later stage.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. An anti-static display device, comprising a metal housing and a liquid crystal panel, a backlight module and a driving mainboard arranged in the metal housing, wherein the liquid crystal panel comprises a color film substrate and an array substrate arranged opposite to each other; characterized in that: The array substrate is larger than the color film substrate and is arranged as the display side of the liquid crystal panel and facing away from the backlight module. A static conductive film is arranged on the surface of the array substrate facing away from the color film substrate. The anti-static display device also includes a first conductive member and a second conductive member, the first conductive member is electrically connected between the static conductive film and the metal casing, and the second conductive member is electrically connected between the metal casing and the driving mainboard.
2. The antistatic display device according to claim 1, characterized in that: The static conductive film is an ITO film or a high resistance film.
3. The antistatic display device according to claim 1, characterized in that: The array substrate includes an overlapped area corresponding to the color filter substrate and an epitaxial area extending outside the color filter substrate; the liquid crystal panel also includes an upper polarizer arranged on a surface of the array substrate facing away from the color filter substrate, and a lower polarizer arranged on a surface of the color filter substrate facing away from the array substrate; The upper polarizer at least covers the display area of the array substrate and avoids the epitaxial area of the array substrate, so that the portion of the electrostatic conductive film located on the epitaxial area is exposed from the periphery of the upper polarizer and contacts the first conductive member.
4. The antistatic display device according to claim 1, characterized in that: The first conductive member is a conductive adhesive material, and the static conductive film and the metal housing are bonded and fixed by the first conductive member.
5. The antistatic display device according to claim 4, characterized in that: The first conductive member is conductive foam or conductive double-sided adhesive.
6. The antistatic display device according to claim 1, characterized in that: The second conductive member is made of conductive elastic material, and the metal housing and the driving mainboard are in contact with each other through the second conductive member.
7. The antistatic display device according to claim 6, characterized in that: The second conductive member is a conductive rubber pad or a conductive silicone pad.
8. The antistatic display device according to claim 7, characterized in that: The backlight module extends a plurality of positioning posts toward the metal casing, the metal casing extends a plurality of positioning hole posts toward the backlight module, the driving mainboard is provided with a plurality of positioning holes, the positioning posts, positioning hole posts and positioning holes correspond one to one, each positioning post passes through the corresponding positioning hole and is embedded in the corresponding positioning hole post; the conductive rubber pad or the conductive silicone pad is sleeved on the positioning post.
9. The antistatic display device according to claim 7, characterized in that: The backlight module extends a plurality of positioning posts toward the metal casing, the metal casing extends a plurality of positioning hole posts toward the backlight module, the driver mainboard is provided with a plurality of positioning holes, the positioning posts, positioning hole posts and positioning holes correspond one to one, each positioning post passes through the corresponding positioning hole and is embedded in the corresponding positioning hole post; the conductive rubber pad or the conductive silicone pad is sleeved outside the positioning post between the driver mainboard and the metal casing.
10. The antistatic display device according to claim 1, characterized in that: The driving mainboard is electrically connected to the liquid crystal panel through a flexible circuit board.