CN205405467U - Flexible touch display screen - Google Patents

Abstract

The utility model relates to a flexible touch display screen, which belongs to the technical field of display devices. The flexible touch display screen of the utility model includes first and second transparent flexible substrates and a liquid crystal layer between them; the first transparent flexible substrate is provided with a touch driving electrode, and the touch driving electrode and the grid The wire is electrically connected; the surface of the second transparent flexible substrate facing the liquid crystal layer is provided with a touch sensing electrode, and the surface facing away from the liquid crystal layer is provided with a touch sensing layer; and the touch sensing layer includes an ITO film layer And a metal intermediate layer arranged on the ITO film layer, and a metal electrode layer located on the metal intermediate layer. The flexible touch display screen of the utility model can not only achieve ultra-thinness, but also eliminate the offset between the click position and the liquid crystal display position; and the sensitivity of the touch screen panel is improved and ensured by setting a metal layer on the transparent conductive film layer. its durability.

Description

Flexible Touch Display

technical field

The utility model relates to the technical field of display devices, more specifically, the utility model relates to a flexible touch display screen.

Background technique

As a new input device, the touch screen is currently the simplest, most convenient and natural way of human-computer interaction; it endows multimedia with a new look and is an extremely attractive multimedia interactive device. At present, touch screens have been widely used in handheld devices such as mobile phones and pads. In addition, they are also widely used in business inquiries of public affairs and information inquiries on urban streets; Multimedia teaching and other fields.

According to the composition and structure, touch screens can be divided into: plug-in touch screens, surface-covered touch screens, and built-in touch screens. Among them, the plug-in touch screen is produced separately from the touch screen and the LCD display, and then bonded together to form a touch-enabled LCD display. The plug-in touch screen has high production costs, low light transmittance, and thick modules. shortcoming. The embedded touch screen embeds the touch electrodes of the touch screen inside the liquid crystal display, which can reduce the overall thickness of the module and greatly reduce the production cost of the touch screen, and is favored by major panel manufacturers. Wherein, the flexible touch screen panel is generally an in-cell touch screen, but compared with the rigid touch screen panel, the flexible touch screen panel in the prior art has lower durability, and poorer sensitivity and error.

Utility model content

In order to solve the above-mentioned technical problems in the prior art, the purpose of this utility model is to provide a flexible touch display screen.

In order to realize above-mentioned utility model object, the utility model adopts following technical scheme:

A flexible touch display screen, comprising a first transparent flexible substrate, a second transparent flexible substrate, and a liquid crystal layer placed between the first transparent flexible substrate and the second transparent flexible substrate, the liquid crystal A frame glue is arranged around the layer; it is characterized in that: an ITO touch driving electrode is arranged on the surface of the first transparent flexible substrate facing the liquid crystal layer, and the ITO touch driving electrode and the first transparent At least one grid line in the flexible substrate is electrically connected; the surface of the second transparent flexible substrate facing the liquid crystal layer is provided with an ITO touch sensing electrode, and the second transparent flexible substrate faces away from the A touch-sensing layer is arranged on the surface of the liquid crystal layer; and the touch-sensing layer includes an ITO film layer, a metal interlayer disposed on the ITO film layer, and a metal electrode layer located on the metal interlayer.

Wherein, a transparent protective film is also arranged on the metal electrode layer.

Wherein, the first transparent flexible substrate is selected from polyethylene terephthalate (PET) film, polymethyl methacrylate film, polycarbonate (PC) film, polyethylene film or polyimide membrane.

Wherein, the second transparent flexible substrate is selected from polyethylene terephthalate (PET) film, polymethyl methacrylate film, polycarbonate (PC) film, polyethylene film or polyimide membrane.

Wherein, the flexible touch display screen further includes a flexible circuit board, one end of the flexible circuit board is electrically connected to the touch sensing layer, and the other end is electrically connected to the touch driving circuit.

Wherein, the flexible circuit board includes: a circuit layer and a shielding layer. The circuit layer is used to transmit the signal from the touch sensing layer to the touch driving circuit, and the signal includes the X coordinate signal and the Y coordinate signal of the position of the touch point; the shielding layer is used to shield other circuits from interfering with the signal.

Wherein, an upper polarizing film layer is arranged between the metal layer and the transparent protective film, and a lower polarizing film layer is arranged on the surface of the first transparent flexible substrate facing away from the liquid crystal layer.

Compared with the prior art, the flexible touch display screen described in the utility model has the following beneficial effects:

The flexible touch display screen of the utility model not only has excellent bending resistance, but also improves the sensitivity and precision of the touch screen panel by arranging a metal layer on the transparent conductive film layer, thereby ensuring its durability.

Description of drawings

FIG. 1 is a schematic structural view of the flexible touch display screen of Embodiment 1.

detailed description

The flexible touch display screen described in the present invention will be further elaborated below in conjunction with specific embodiments, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the utility model concept and technical solution of the present invention.

Example 1

As shown in Figure 1, the flexible touch display screen of this embodiment includes a first transparent flexible substrate 10, a second transparent flexible substrate 20, and The liquid crystal layer 30 between the flexible substrates 20 is provided with a frame glue 32 around the liquid crystal layer. The surface of the first transparent flexible substrate 10 facing the liquid crystal layer 30 is provided with an ITO touch driving electrode 31, the ITO touch driving electrode 31 and at least one of the first transparent flexible substrate 10 Grid lines (not shown in the figure) are electrically connected; the surface of the second transparent flexible substrate 20 facing the liquid crystal layer 30 is provided with ITO touch sensing electrodes 33, and the second transparent flexible substrate 20 A touch sensitive layer 40 is disposed on the surface opposite to the liquid crystal layer 30 . The flexible touch display screen also includes a flexible circuit board (not shown in the figure), one end of the flexible circuit board is electrically connected to the ITO touch sensing layer, and the other end is electrically connected to the touch driving circuit. The flexible circuit board includes: a circuit layer and a shielding layer. The circuit layer is used to transmit the signal from the touch sensing layer to the touch driving circuit, and the signal includes the X coordinate signal and the Y coordinate signal of the position of the touch point. In this embodiment, the touch-sensitive layer is provided with a pattern for sensing touch from the outside world. For example, when the user touches with a finger, a signal carrying the user's touch position information will be generated in the touch-sensitive layer, and this signal It needs to be output through the lead-out electrodes in the touch-sensing layer. Specifically, when the user touches the screen with a finger, due to the electric field of the human body, the finger and the touch-sensing layer will form a coupling capacitance, and the capacitance signal will be transmitted through the circuit layer in the flexible circuit board. to the touch drive circuit. The driving circuit calculates and accurately obtains the position of the touch point according to the signal from the touch sensing layer. When the signal from the touch sensing layer is transmitted through the flexible circuit board, it may be interfered by other circuits. Therefore, a shielding layer is usually provided under the circuit layer of the flexible circuit board. The shielding layer can be realized by using metal materials such as copper. The shielding layer can be implemented as a complete planar structure, mesh structure or other structures. For example, when high noise immunity is required, a complete copper layer can be used to implement the shielding layer. The touch driving circuit described in this embodiment is a well-known touch driving circuit in the prior art. In this embodiment, the touch sensing layer 40 includes an ITO film layer 41, a metal intermediate layer 42 disposed on the ITO film layer 41, and a metal electrode layer 43 located on the metal intermediate layer, so as to improve its Durability, and can avoid the increase of resistance caused by bad use, so that the sensitivity of the flexible touch display screen can be avoided. The purpose of setting up the metal intermediate layer is to prevent the electrical contact between the metal electrode layer and the ITO film layer from being deteriorated or even separated due to operations such as bending of the flexible touch display screen. A transparent protective film 50 is also disposed on the metal electrode layer 43 . An upper polarizer 60 is disposed between the metal electrode layer and the transparent protective film, and a lower polarizer 70 is disposed on the surface of the first transparent flexible substrate 10 facing away from the liquid crystal layer 30 . In this embodiment, the actual signal generated by the touch driving circuit is transmitted to the touch driving electrode through the gate line connected to the touch driving electrode, and the touch display function of the liquid crystal layer is realized through the touch driving electrode and the touch sensing electrode. . In this embodiment, the first and second transparent flexible substrates polyethylene terephthalate (PET) film, polymethyl methacrylate film, polycarbonate (PC) film, polyethylene film or polyimide film. The touch driving electrodes, touch sensing electrodes, and touch sensing layers are made of transparent oxide films, such as commonly used indium tin oxide (ITO), indium zinc oxide (IZO) or aluminum-doped zinc oxide (AZO). . In this embodiment, various coatings can be prepared by physical vapor deposition, chemical vapor deposition, or electroplating, such as sputtering, arc evaporation, and plasma deposition. In order to form an image, a mask-etching process may be used, and dry etching or wet etching may be used for etching, and since they are all conventional preparation processes, details are not described here.

For those of ordinary skill in the art, the specific embodiment is only an exemplary description of the utility model. Obviously, the specific implementation of the utility model is not limited by the above-mentioned method, as long as the method concept and technical solution of the utility model are adopted to carry out Various insubstantial improvements, or directly applying the concept and technical solutions of the utility model to other occasions without improvement, are all within the protection scope of the utility model.

Claims (6)

1. flexible touch a display screen, including the first transparent flexible substrate, the second transparent flexible substrate and be placed in the liquid crystal layer between described first transparent flexible substrate and the second transparent flexible substrate, described liquid crystal layer be provided around frame adhesive；It is characterized in that: described first transparent flexible substrate is provided with ITO touch-control drive electrode on the surface of described liquid crystal layer, and described ITO touch-control drive electrode is electrically connected with at least one grid line in described first transparent flexible substrate；Described second transparent flexible substrate is provided with ITO touch-control sensing electrode on the surface of described liquid crystal layer, and described second transparent flexible substrate is provided with touch sensitive layer on the surface of described liquid crystal layer；And described touch sensitive layer includes ito film layer and is arranged on the metal intermediate layer on described ito film layer, and is positioned at the metal electrode layer in described metal intermediate layer.

2. flexible touch display screen according to claim 1, it is characterised in that be provided with transparent protective film on described metal electrode layer.

3. flexible touch display screen according to claim 1, it is characterised in that described first transparent flexible substrate is selected from polyethylene terephthalate film, polymethyl methacrylate film, polycarbonate membrane, polyethylene film or polyimide film.

4. flexible touch display screen according to claim 1, it is characterised in that described second transparent flexible substrate is selected from polyethylene terephthalate film, polymethyl methacrylate film, polycarbonate membrane, polyethylene film or polyimide film.

5. flexible touch display screen according to claim 1, it is characterised in that the described flexible display screen that touches also includes flexible circuit board, and one end of described flexible circuit board electrically connects described touch sensitive layer, and the other end is electrically connected touch drive circuit；And described flexible circuit board includes line layer and screen layer.

6. flexible touch display screen according to claim 1, it is characterised in that being provided with polarisation rete between described metal level and described transparent protective film, described first transparent flexible substrate is provided with lower polarisation rete on the surface of described liquid crystal layer.