Liquid crystal touch screen with touch layer embedded into cover plate glass

Abstract

The utility model relates to the field of touch screens, and discloses a liquid crystal touch screen with a touch layer embedded into cover plate glass, which comprises the cover plate glass and the liquid crystal touch layer arranged in the cover plate glass, the liquid crystal touch layer is provided with a conducting layer, a liquid crystal box component is arranged below the conducting layer, and the liquid crystal box component is provided with a liquid crystal layer. A signal function layer is arranged below the liquid crystal box assembly; the novel glass cover plate plays a role in protecting the screen and optimizing the surface texture, and the tempered glass material is high in strength, high in hardness and good in light transmittance; the liquid crystal touch layer, the liquid crystal box assembly and the signal function layer are all embedded in the cover plate glass, the overall thickness of the touch screen is greatly reduced, meanwhile, the liquid crystal box assembly of the capacitive touch screen adopts the TN type liquid crystal working principle, the TN type liquid crystal box has the advantage in cost due to the simple display principle, and the cost is reduced; according to the novel colloid functional sheet, touch signals are transmitted out from the flexible circuit board through the anisotropic conductive adhesive, so that the purpose of controlling the liquid crystal screen is achieved.

Description

Technical Field

[0001] The utility model relates to the field of touch screens, in particular to a liquid crystal touch screen with a touch layer embedded inside a cover glass. Background Technique

[0002] A liquid crystal touch screen, also known as a touch panel, is an inductive liquid crystal display device that can receive input signals such as touch heads. When a graphic button on the screen is touched, the tactile feedback system on the screen can drive various connecting devices according to a pre-programmed program, which can be used to replace a mechanical button panel and create vivid audio-visual effects through the liquid crystal display screen. The existing liquid crystal touch screen is realized by combining an LCD liquid crystal screen and a touch screen panel component, including an LCD liquid crystal screen and a touch screen panel. The LCD liquid crystal screen includes a liquid crystal layer and substrate glasses and polarizers arranged on the upper and lower sides of the liquid crystal layer. The touch screen panel includes a touch layer glass substrate, and a touch circuit layer is arranged on the upper surface of the touch layer glass substrate. The touch circuit layer is fixed to the outermost cover glass through an adhesive layer. The touch layer glass substrate is pasted on the upper polarizer. This design has many overall hierarchical structures, is relatively thick and heavy, and has a high production cost.

[0003] Therefore, a liquid crystal touch screen with a touch layer embedded inside a cover glass is needed to solve this problem. Content of the Utility Model

[0004] The purpose of the utility model is to provide a liquid crystal touch screen with a touch layer embedded inside a cover glass, aiming to solve the problems raised in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A liquid crystal touch screen with a touch layer embedded inside a cover glass includes a cover glass and a liquid crystal touch layer arranged inside the cover glass. The liquid crystal touch layer is provided with a conductive layer, a liquid crystal cell assembly is arranged below the conductive layer, and a signal function layer is arranged below the liquid crystal cell assembly.

[0007] Preferably, the cover glass is made of tempered material, an OCA optical adhesive is arranged below the cover glass, and an ITO conductive film is arranged below the OCA optical adhesive.

[0008] Preferably, the liquid crystal cell assembly includes a cell body made of epoxy resin material. An upper polarizer is arranged in the cell body, and an upper glass is arranged below the upper polarizer.

[0009] Preferably, an electrode is arranged below the upper glass, a sealing frame is arranged on one side of the electrode, a transition electrode plate is arranged on the opposite side of the sealing frame, and one end of the transition electrode plate is connected to a lower glass.

[0010] Preferably, a lower polarizer is provided below the lower glass, and a reflector is provided below the lower polarizer.

[0011] Preferably, the signal function layer includes a colloidal function sheet. One end of the colloidal function sheet is provided with anisotropic conductive adhesive, which is connected to a flexible circuit board, and the flexible circuit board is fitted into a through hole. Beneficial effects: The novel glass cover plate plays a role in protecting the screen and optimizing the surface texture. The tempered glass material has high strength, strong hardness, and good light transmittance. The novel liquid crystal touch layer, liquid crystal cell assembly, and signal function layer are all fitted into the cover glass, greatly reducing the overall thickness of the touch screen. At the same time, the liquid crystal cell assembly of the capacitive touch screen adopts the working principle of TN-type liquid crystal. The simple display principle makes the TN-type liquid crystal cell have an advantage in cost, reducing the cost. The novel colloidal function sheet is the signal function layer of the capacitive screen, transmitting touch signals. The anisotropic conductive adhesive ACF uses conductive particles to connect the electrodes between the IC chip and the substrate to make it conductive, and at the same time can avoid conduction short circuit between adjacent two electrodes, achieving the purpose of conduction only in the Z-axis direction. The colloidal function sheet uses the anisotropic conductive adhesive to transmit the touch signal from the flexible circuit board to achieve the purpose of controlling the liquid crystal screen. Brief Description of the Drawings

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0013] Figure 1 It is a schematic diagram of the external structure and the internal structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the cover glass structure of the present invention;

[0015] Figure 3 It is a schematic diagram of the liquid crystal cell assembly structure of the present invention;

[0016] Figure 4 It is a schematic diagram of the signal function layer structure of the present invention.

[0017] Legend Explanation:

[0018] 1. Cover glass; 2. Liquid crystal touch layer; 3. Conductive layer; 4. Liquid crystal cell assembly; 5. Signal function layer; 11. OCA optical adhesive; 12. ITO conductive film; 41. Cell body; 42. Upper polarizer; 421. Upper glass; 43. Electrode; 431. Sealing frame; 44. Transition electrode plate; 441. Lower glass; 45. Lower polarizer; 46. Reflective sheet; 51. Gelatinous function sheet; 52. Anisotropic conductive adhesive; 53. Flexible circuit board; 54. Through hole. Detailed implementation manner

[0019] The following will further describe the present utility model in detail with reference to the drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the utility model.

[0020] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0021] In addition, "a plurality" means two or more. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can use them. When the combination of technical solutions conflicts with each other or cannot be realized, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the utility model.

[0022] Please refer to the attached drawings of the specification Figures 1 - 4 , a liquid crystal touch screen with a touch layer embedded inside the cover glass, including a cover glass 1 and a liquid crystal touch layer 2 provided inside the cover glass 1. The liquid crystal touch layer 2 is provided with a conductive layer 3, a liquid crystal cell assembly 4 is provided below the conductive layer 3, and a signal function layer 5 is provided below the liquid crystal cell assembly 4.

[0023] Furthermore, the cover glass 1 is made of tempered material. An OCA optical adhesive 11 is provided below the cover glass 1, and an ITO conductive film 12 is provided below the OCA optical adhesive 11. The glass cover 1 plays a role in protecting the screen and optimizing the surface texture. Tempered glass has high strength, strong hardness and good light transmittance. The OCA optical adhesive is a solid optical adhesive with good viscosity and strong light transmittance, which makes the cover glass 1 and the ITO conductive film 12 fit together.

[0024] Further, the liquid crystal cell assembly 4 includes a cell body 41 made of epoxy resin. An upper polarizer 42 is provided in the cell body 41, and an upper glass 421 is provided below the upper polarizer 42.

[0025] Further, an electrode 43 is provided below the upper glass 421. A sealing frame 431 is provided on one side of the electrode 43, and a transition electrode plate 44 is provided on the opposite side of the sealing frame 431. One end of the transition electrode plate 44 is connected to a lower glass 441.

[0026] Further, a lower polarizer 45 is provided below the lower glass 441, and a reflector 46 is provided below the lower polarizer 45. The liquid crystal cell assembly 4 of the capacitive touch screen operates on the TN (Twisted Nematic) liquid crystal principle. In the absence of an electric field, light can smoothly enter from the lower polarizer 45, rotate its traveling direction according to the liquid crystal molecules, and then exit from the upper polarizer 42 to form a bright state display. When an electric field is applied to the liquid crystal cell assembly 4, the twisted structure of the positive nematic liquid crystal molecules is destroyed and they are arranged along the electric field direction. At this time, the optical rotation property of the TN liquid crystal disappears, and the liquid crystal between the polarizers loses its light transmission function, thereby obtaining a dark state display. This simple display principle gives the TN liquid crystal cell an advantage in cost and reduces the cost.

[0027] Further, the signal function layer 5 includes a colloidal function sheet 51. An anisotropic conductive film 52 is provided at one end of the colloidal function sheet 51. The anisotropic conductive film 52 is connected to a flexible circuit board 53. The flexible circuit board 53 is fitted into a through hole 54. The colloidal function sheet 51 is the signal function layer of the capacitive touch screen and transmits touch signals. The anisotropic conductive film ACF (Anisotropic Conductive Film) uses conductive particles to connect the electrodes between the IC chip and the substrate to make them conductive, and at the same time can avoid short - circuit conduction between adjacent electrodes, thus achieving the purpose of conduction only in the Z - axis direction. The colloidal function sheet 51 transmits the touch signals from the flexible circuit board 53 by using the anisotropic conductive film 52.

[0028] First, the glass cover plate 1 serves to protect the screen and optimize the surface texture. Tempered glass has high strength, strong hardness, and good light transmittance. The OCA optical adhesive is a solid-state optical adhesive with good viscosity and strong light transmittance, which bonds the cover plate glass 1 and the ITO conductive film 12. Secondly, the liquid crystal touch layer 2, the liquid crystal cell assembly 4, and the signal function layer 5 are all embedded in the cover plate glass 1, greatly reducing the overall thickness of the touch screen. At the same time, the liquid crystal cell assembly 4 of the capacitive touch screen adopts the TN-type liquid crystal working principle. In the absence of an electric field, light can smoothly enter from the lower polarizer 45, rotate its traveling direction according to the liquid crystal molecules, and then exit from the upper polarizer 42 to form a bright state display. When an electric field is applied to the liquid crystal cell assembly 4, the twisted structure of the positive nematic liquid crystal molecules is destroyed and arranged along the electric field direction. At this time, the optical rotation property of the TN liquid crystal disappears, and the liquid crystal between the polarizers loses its light transmission function, resulting in a dark state display. This simple display principle gives the TN-type liquid crystal cell an advantage in cost, reducing the cost. Finally, the gelatinous function sheet 51 is the signal function layer of the capacitive screen, transmitting touch signals. The anisotropic conductive adhesive ACF uses conductive particles to connect the electrodes between the IC chip and the substrate to make them conductive, while also preventing short circuits between adjacent electrodes, and achieving the purpose of conduction only in the Z-axis direction. The gelatinous function sheet 51 uses the anisotropic conductive adhesive 52 to transmit the touch signal from the flexible circuit board 53 to achieve the purpose of controlling the liquid crystal screen.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

[0030] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0031] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A liquid crystal touch screen with a touch layer embedded inside a cover glass, comprising a cover glass (1) and a liquid crystal touch layer (2) provided inside the cover glass (1), characterized in that, The liquid crystal touch layer (2) is provided with a conductive layer (3), a liquid crystal cell assembly (4) is provided below the conductive layer (3), and a signal function layer (5) is provided below the liquid crystal cell assembly (4).

2. The liquid crystal touch screen according to claim 1, wherein the touch layer is embedded inside the cover glass, characterized in that The cover glass (1) is made of tempered material, an OCA optical adhesive (11) is provided below the cover glass (1), and an ITO conductive film (12) is provided below the OCA optical adhesive (11).

3. The liquid crystal touch screen according to claim 1, wherein the touch layer is embedded inside the cover glass, characterized in that The liquid crystal cell assembly (4) includes a cell body (41), the cell body (41) is made of epoxy resin, an upper polarizer (42) is provided in the cell body (41), and an upper layer glass (421) is provided below the upper polarizer (42).

4. A liquid crystal touch screen with a touch layer embedded inside a cover glass according to claim 3, wherein, An electrode (43) is provided below the upper layer glass (421), a sealing frame (431) is provided on one side of the electrode (43), a transition electrode plate (44) is provided on the opposite side of the sealing frame (431), and one end of the transition electrode plate (44) is connected to a lower layer glass (441).

5. The liquid crystal touch screen according to claim 4, wherein the touch layer is embedded inside the cover glass, characterized in that A lower polarizer (45) is provided below the lower layer glass (441), and a reflector (46) is provided below the lower polarizer (45).

6. The liquid crystal touch screen according to claim 1, wherein the touch layer is embedded inside the cover glass, characterized in that The signal function layer (5) includes a gelatinous functional sheet (51), an anisotropic conductive adhesive (52) is provided at one end of the gelatinous functional sheet (51), the anisotropic conductive adhesive (52) is connected to a flexible circuit board (53), and the flexible circuit board (53) is fitted into a through hole (54).

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