Touch screen and touch display module

Abstract

The utility model discloses a touch screen which comprises a substrate base plate, a touch sensing layer and a driving circuit board, the touch sensing layer is arranged on the surface of one side of the substrate base plate, a plurality of binding terminals are arranged on the touch sensing layer on one side edge of the substrate base plate, and the driving circuit board is arranged on the side edge of the substrate base plate. The driving circuit board is bound on the binding terminal of the touch sensing layer; the touch screen further comprises a transparent conducting film and a grounding circuit board, the transparent conducting film is arranged on the surface of the side, back on to the touch sensing layer, of the substrate, and a grounding terminal is arranged on the side edge, on the substrate, of the transparent conducting film. Grounding exposed copper is arranged on the driving circuit board, one connecting end of the grounding circuit board is electrically connected with the grounding terminal of the transparent conductive film, and the other connecting end of the grounding circuit board is electrically connected with the grounding exposed copper on the driving circuit board. The touch screen can effectively dredge static electricity generated by the display screen. The utility model further discloses a touch display module which comprises the touch screen.

Description

Technical Field

[0001] The utility model relates to touch technology, in particular to a touch screen and a touch display module. Background Art

[0002] The touch screen is an important tool for human-computer interaction. Capacitive touch screens have become the most mainstream touch screen basis on the market due to their advantages such as multi-touch, fast response speed and long life.

[0003] At present, touch screens are mostly used in conjunction with display screens, and the display screen itself is an electronic device that generates static electricity when powered on. This static electricity is transmitted upward to the touch screen, which may cause the sensor circuit of the touch screen to be damaged by static electricity, affecting the stability of the touch screen. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a touch screen which can effectively channel the static electricity generated by the display screen.

[0005] The utility model also provides a touch display module, comprising the above touch screen.

[0006] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0007] A touch screen comprises a substrate, a touch sensing layer and a driving circuit board, wherein the touch sensing layer is arranged on a side surface of the substrate, the touch sensing layer is provided with a plurality of binding terminals on a side edge of the substrate, and the driving circuit board is bound to the binding terminals of the touch sensing layer; the touch screen further comprises a transparent conductive film and a grounding circuit board, the transparent conductive film is arranged on a side surface of the substrate facing away from the touch sensing layer, the transparent conductive film is provided with a grounding terminal on a side edge of the substrate; the driving circuit board is provided with grounding exposed copper, one connecting end of the grounding circuit board is electrically connected to the grounding terminal of the transparent conductive film, and the other connecting end is electrically connected to the grounding exposed copper on the driving circuit board.

[0008] Furthermore, the touch sensing layer includes a touch area and a routing area, the routing area surrounds the periphery of the touch area, a plurality of touch sensors are distributed in the touch area, and a plurality of touch routings are distributed on the routing area; the binding terminal is arranged on the routing area of ​​the touch sensing layer, one end of the touch routing is electrically connected to the corresponding touch sensor, and the other end is electrically connected to the corresponding binding terminal.

[0009] Furthermore, the driving circuit board includes a first connection end, a second connection end and a routing area, the routing area is connected between the first connection end and the second connection end, the first connection end is provided with a binding PIN pin bound to the binding terminal, and the second connection end is provided with a signal PIN pin and a grounding PIN pin; the binding PIN pin and the signal PIN pin, and the grounding exposed copper and the grounding PIN pin are electrically connected respectively through copper foil routing inside the routing area.

[0010] Furthermore, the grounding exposed copper is arranged on a side of the first connection end that is opposite to or adjacent to the binding PIN pin.

[0011] Furthermore, the transparent conductive film is a transparent metal film or a transparent conductive oxide film.

[0012] Furthermore, the ground terminal is a metal terminal.

[0013] Furthermore, the touch screen further comprises a first transparent adhesive layer and a cover substrate, and the touch sensing layer on the base substrate is adhered to one side surface of the cover substrate via the first transparent adhesive layer.

[0014] A touch display module comprises a display screen, a second transparent adhesive layer and the above-mentioned touch screen, wherein the touch screen is attached to the display side surface of the display screen through the second transparent adhesive layer.

[0015] Furthermore, the display screen is an OLED screen or an LCD screen.

[0016] Furthermore, the display screen is an LCD screen, and the touch display module further includes a backlight source and a light-shielding frame glue, and the light-incident side surface of the display screen is adhered to the light-emitting side surface of the backlight source through the light-shielding frame glue.

[0017] The utility model has the following beneficial effects: the touch screen of the utility model arranges the transparent conductive film on the surface of the side of the substrate facing the display screen, and electrically connects the ground terminal on the transparent conductive film with the ground exposed copper on the driving circuit board through the ground circuit board; when the display screen generates static electricity when powered on, the static electricity generated by the display screen is transferred upward to the transparent conductive film, and then the transparent conductive film transfers the collected static electricity to the driving circuit board through the ground terminal, the ground circuit board and the ground exposed copper in sequence, and the static electricity is grounded through the driving circuit board, which can effectively guide the static electricity generated by the display screen, avoid the touch sensing layer being damaged by static electricity breakdown, and improve the stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the stacking structure of the touch screen provided by the utility model.

[0019] Figure 2 This is a schematic diagram of the planar structure of a driving circuit board in a touch screen provided by the utility model.

[0020] Figure 3 This is a schematic diagram of the stacking structure of another touch screen provided by the utility model.

[0021] Figure 4 This is a schematic diagram of the stacking structure of the touch display module provided by the utility model.

[0022] Figure 5 This is a schematic diagram of the stacking structure of another touch display module provided by the utility model. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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. Embodiment 1

[0027] like Figure 1 and 2 As shown, a touch screen comprises a base substrate 10, a touch sensing layer 20, a transparent conductive film 30, a driving circuit board 40 and a grounding circuit board 50, wherein the touch sensing layer 20 is arranged on one side surface of the base substrate 10, and the transparent conductive film 30 is arranged on the side surface of the base substrate 10 which faces away from the touch sensing layer 20; the touch sensing layer 20 is provided with a plurality of binding terminals 21 on one side edge of the base substrate 10, and the driving circuit board 40 is bound to the binding terminals 21 of the touch sensing layer 20; the transparent conductive film 30 is provided with a grounding terminal 31 on one side edge of the base substrate 10; the driving circuit board 40 is provided with a grounding exposed copper 41, and one connecting end of the grounding circuit board 50 is electrically connected to the grounding terminal 31 of the transparent conductive film 30, and the other connecting end is electrically connected to the grounding exposed copper 41 on the driving circuit board 40.

[0028] The touch screen of the utility model is provided with the transparent conductive film 30 on the surface of the side of the base substrate 10 facing the display screen 80, and the grounding terminal 31 on the transparent conductive film 30 is electrically connected to the grounding exposed copper 41 on the driving circuit board 40 through the grounding circuit board 50. When the display screen 80 generates static electricity when powered on, the static electricity generated by the display screen 80 is transferred upward to the transparent conductive film 30, and then the transparent conductive film 30 transfers the collected static electricity to the driving circuit board 40 through the grounding terminal 31, the grounding circuit board 50 and the grounding exposed copper 41 in sequence, and the static electricity is grounded through the driving circuit board 40, which can effectively guide the static electricity generated by the display screen 80, avoid the touch sensing layer 20 from being damaged by static electricity breakdown, and improve the stability of use.

[0029] The touch sensing layer 20 includes a touch area and a routing area, the routing area surrounds the periphery of the touch area, a plurality of touch sensors (not shown in the figure) are distributed in the touch area, and a plurality of touch routing wires (not shown in the figure) are distributed on the routing area; the binding terminal 21 is arranged on the routing area of ​​the touch sensing layer 20, one end of the touch routing wire is electrically connected to the corresponding touch sensor, and the other end is electrically connected to the corresponding binding terminal 21.

[0030] The driving circuit board 40 receives a control signal from an external terminal mainboard equipped with a processor, and uses a driving chip to convert the received control signal into a corresponding driving signal, and then outputs the driving signal to each touch sensor through the touch wiring; the driving circuit board 40 also receives a touch signal from each touch sensor through the touch wiring, and uses the driving chip to convert the received touch signal into a corresponding control signal, and then outputs it to the external terminal mainboard.

[0031] The driving chip is bound to the driving circuit board 40 (COF structure) or is bound together with the driving circuit board 40 to the binding terminal 21 bound to the touch sensing layer 20 (COG structure).

[0032] The driving circuit board 40 includes a first connection end 42, a second connection end 43 and a routing area 44, the routing area 44 is connected between the first connection end 42 and the second connection end 43, the first connection end 42 is provided with a binding PIN pin 45 bound to the binding terminal 21, and the second connection end 43 is provided with a signal PIN pin 46 and a grounding PIN pin 47 electrically connected to the external terminal mainboard; the binding PIN pin 45 and the signal PIN pin 46, as well as the grounding exposed copper 41 and the grounding PIN pin 47 are electrically connected respectively through the copper foil routing 48 inside the routing area 44.

[0033] When electrically connected to an external terminal mainboard, the signal PIN pin 46 and the ground PIN pin 47 of the driving circuit board 40 are both electrically connected to the terminal mainboard. The signal PIN pin 46 is used to transmit driving signals and touch signals to the processor on the terminal mainboard, while the ground PIN pin 47 conducts static electricity through the grounding circuit on the terminal mainboard.

[0034] In this embodiment, the grounding exposed copper 41 is arranged on the side of the first connection end 42 opposite to the binding PIN pin 45. In a specific implementation, according to the position of the grounding terminal 31 on the transparent conductive film 30, the grounding exposed copper 41 can also be arranged on the side of the first connection end 42 adjacent to the binding PIN pin 45.

[0035] In this embodiment, the transparent conductive film 30 can be but is not limited to a transparent metal film or a transparent conductive oxide film, such as an ITO film, an AZO film or a ZnO film; the base substrate 10 can be but is not limited to a glass substrate, such as silicon-based glass, borate glass, etc.; the ground terminal 31 can be but is not limited to a metal terminal, preferably a molybdenum-aluminum-molybdenum terminal. Embodiment 2

[0036] As an optimization solution of the first embodiment, in this embodiment, if Figure 3 As shown, the touch screen further includes a first transparent adhesive layer 70 and a cover substrate 60 , and the touch sensing layer 20 on the base substrate 10 is attached to a side surface of the cover substrate 60 through the first transparent adhesive layer 70 .

[0037] In this embodiment, the first transparent adhesive layer 70 may be, but is not limited to, a transparent optical adhesive, such as OCA optical adhesive, OCR optical adhesive, etc., and the cover substrate 60 may be, but is not limited to, a glass substrate, such as silicon-based glass, borate glass, etc. Embodiment 3

[0038] like Figure 4 As shown, a touch display module includes a display screen 80 , a second transparent adhesive layer 90 and the touch screen described in the first embodiment, wherein the touch screen is attached to the display side surface of the display screen 80 through the second transparent adhesive layer 90 .

[0039] In this embodiment, the second transparent adhesive layer 90 may be, but is not limited to, transparent optical adhesive, such as OCA optical adhesive, OCR optical adhesive, etc.

[0040] Wherein, the display screen 80 is an OLED screen or an LCD screen. If the display screen 80 is an LCD screen, then Figure 5 As shown, the touch display module further includes a backlight source 100 and a light shielding sealant 110 , and the light incident side surface of the display screen 80 is adhered to the light emitting side surface of the backlight source 100 through the light shielding sealant 110 .

[0041] At least one surface of the light-shielding frame glue 110 facing the display screen 80 is a black surface and has a window area for defining the light-emitting area of ​​the backlight source 100 , and the light-emitting area of ​​the backlight source 100 corresponds to the visible area of ​​the display screen 80 .

[0042] 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. A touch screen, comprising a base substrate, a touch sensing layer and a driving circuit board, wherein the touch sensing layer is arranged on a side surface of the base substrate, the touch sensing layer is provided with a plurality of binding terminals on a side edge of the base substrate, and the driving circuit board is bound to the binding terminals of the touch sensing layer; characterized in that: The touch screen also includes a transparent conductive film and a grounding circuit board, wherein the transparent conductive film is arranged on a surface of the base substrate on the side facing away from the touch sensing layer, and the transparent conductive film is provided with a grounding terminal on one side of the base substrate; the driving circuit board is provided with grounding exposed copper, one connecting end of the grounding circuit board is electrically connected to the grounding terminal of the transparent conductive film, and the other connecting end is electrically connected to the grounding exposed copper on the driving circuit board.

2. The touch screen according to claim 1, characterized in that: The touch sensing layer includes a touch area and a routing area, the routing area surrounds the periphery of the touch area, a plurality of touch sensors are distributed in the touch area, and a plurality of touch routings are distributed on the routing area; the binding terminal is arranged on the routing area of ​​the touch sensing layer, one end of the touch routing is electrically connected to the corresponding touch sensor, and the other end is electrically connected to the corresponding binding terminal.

3. The touch screen according to claim 1 or 2, characterized in that: The driving circuit board includes a first connection end, a second connection end and a routing area, the routing area is connected between the first connection end and the second connection end, the first connection end is provided with a binding PIN pin bound and connected to the binding terminal, and the second connection end is provided with a signal PIN pin and a grounding PIN pin; the binding PIN pin and the signal PIN pin, and the grounding exposed copper and the grounding PIN pin are respectively electrically connected through copper foil routing inside the routing area.

4. The touch screen according to claim 3, characterized in that: The grounding exposed copper is arranged on a side of the first connection end that is opposite to or adjacent to the binding PIN pin.

5. The touch screen according to claim 1, characterized in that: The transparent conductive film is a transparent metal film or a transparent conductive oxide film.

6. The touch screen according to claim 1, characterized in that: The ground terminal is a metal terminal.

7. The touch screen according to claim 1, characterized in that: The touch screen further comprises a first transparent adhesive layer and a cover substrate, and the touch sensing layer on the base substrate is attached to a side surface of the cover substrate through the first transparent adhesive layer.

8. A touch display module, characterized in that: The invention comprises a display screen, a second transparent adhesive layer and the touch screen according to claim 1, wherein the touch screen is attached to the display side surface of the display screen through the second transparent adhesive layer.

9. The touch display module according to claim 8, characterized in that: The display screen is an OLED screen or an LCD screen.

10. The touch display module according to claim 8, characterized in that: The display screen is an LCD screen, and the touch display module further includes a backlight source and a light-shielding frame glue. The light-incident side surface of the display screen is adhered to the light-emitting side surface of the backlight source through the light-shielding frame glue.

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