Touch control structure, display device and vehicle-mounted equipment thereof

Abstract

The utility model provides a touch control structure, a display device and vehicle-mounted equipment thereof, and relates to the technical field of touch control sensors, the touch control structure comprises a first polarized light unit, a second polarized light unit and a metal grid touch control unit, the metal grid touch control unit is arranged between the first polarized light unit and the second polarized light unit; or the metal grid touch control unit is arranged at the lower parts of the first polarization unit and the second polarization unit. According to the touch display panel, the original touch display Out cell structure is improved, and the situation that a picture displayed by the touch display panel is black or rainbow lines appear is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of touch sensors, and more specifically, to a touch structure, a display device and a vehicle-mounted device thereof. Background Art

[0002] With the continuous development of touch technology, various types of touch sensors have emerged. Among them, metal grid touch sensor is one of the important solutions in current touch technology. This solution implements capacitive touch structure based on metal grid and can provide excellent touch performance for products such as mobile phones, tablets, laptops, and automotive displays.

[0003] There are two common application scenarios in the Out cell solution of the existing metal touch sensor structure, one is the LCD (Liquid Crystal Display) structure, and the other is the OLED (Organic Light-Emitting Diode) structure. Among them, the touch display panel of the LCD structure is formed by laminating a liquid crystal display panel and a touch panel; the OLED structure is formed by laminating an OLED display panel and a touch panel.

[0004] However, when the above two structures are used as display screens for vehicle-mounted or outdoor applications, when the user wears polarized sunglasses or polarized glasses, the polarization direction of the light allowed to pass through the polarized sunglasses or polarized glasses is difficult to be consistent with the polarization direction of the light emitted by the touch display panel, which can easily cause the image displayed on the touch display panel seen by the driver to appear black or have rainbow patterns. Utility Model Content

[0005] In order to overcome the above problems, the utility model provides a touch control structure, a display device and a vehicle-mounted device thereof.

[0006] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0007] A touch structure includes a first polarizing unit, a second polarizing unit and a metal mesh touch unit, wherein:

[0008] The metal mesh touch unit is disposed between the first polarizing unit and the second polarizing unit; or,

[0009] The first polarizing unit, the second polarizing unit, and the metal mesh touch unit are arranged in sequence from top to bottom.

[0010] The current LCD structure is usually made of a metal grid touch unit, an analyzer, a filter, a liquid crystal layer, a TFT array, a polarizer and a backlight source, which are bonded and connected in sequence; the current OLED structure is usually made of a metal grid touch unit, a linear polarizer, a wave plate and an OLED, which are bonded and connected in sequence. From the overall structure point of view, in the above existing structure, the metal grid touch unit is arranged on the upper part of the two polarization units.

[0011] On the basis of the above existing structure, taking the metal mesh touch unit disposed between the first polarizing unit and the second polarizing unit as an example, the first polarizing unit and the second polarizing unit are respectively used as a polarizer and an analyzer in the improved structure of the LCD, so the overall structure is arranged in layers as follows: the first polarizing unit-the metal mesh touch unit-the second polarizing unit;

[0012] Taking the example of a metal mesh touch unit being arranged at the lower part of the first polarizing unit and the second polarizing unit, the first polarizing unit and the second polarizing unit can be a linear polarizer and a quarter wave plate, and the linear polarizer is a coated polarizer or a stretched polarizer. Therefore, the overall structure is arranged in layers as first polarizing unit-second polarizing unit-metal mesh touch unit.

[0013] The units of the above two structures can be installed by bonding with an adhesive, wherein the first polarizing unit and the second polarizing unit can also be formed on corresponding surfaces by coating.

[0014] Compared with the existing LCD and OLED structures, in the above embodiments, by setting the metal mesh touch unit between the first polarizing unit and the second polarizing unit or setting the metal mesh touch unit below the first polarizing unit and the second polarizing unit, the problem of the screen turning black or having rainbow patterns when viewing the vehicle-mounted touch display with sunglasses can be effectively solved.

[0015] Preferably, the metal mesh touch unit comprises a first metal mesh layer, a second metal mesh layer and a substrate, wherein:

[0016] The first metal mesh layer and the second metal mesh layer are sequentially arranged on the upper part of the substrate; or,

[0017] The first metal mesh layer and the second metal mesh layer are sequentially arranged at the lower part of the substrate.

[0018] Preferably, the first metal mesh layer and the second metal mesh layer are respectively arranged on the upper and lower sides of the substrate.

[0019] Preferably, the first metal mesh layer is disposed on the protective film of the first polarizing unit or the second polarizing unit to form a first part, the second metal mesh layer is disposed on the upper part or the lower part of the substrate to form a second part, and the first part and the second part are butt-jointed by an adhesive.

[0020] More preferably, the substrate is directly bonded to the protective film of the adjacent polarizing unit, or the substrate replaces the protective film of the adjacent polarizing unit and is directly bonded to the polarizing unit.

[0021] More preferably, the substrate is a low phase difference film, and its phase difference R0 is less than 10 nm, or,

[0022] The substrate is a phase delay film, and its phase difference R0>8000nm.

[0023] Preferably, it further comprises a compensation film for converting the emitted light into circularly polarized light or elliptically polarized light, wherein the compensation film, the first polarizing unit, the metal mesh touch unit and the second polarizing unit are arranged in sequence; or,

[0024] The compensation film, the first polarizing unit, the second polarizing unit and the metal mesh touch unit are arranged in sequence.

[0025] Preferably, the bonding area of ​​the metal mesh touch unit extends outside the overlapping area of ​​the metal mesh touch unit and the first polarizing unit and the second polarizing unit, wherein the bonding area of ​​the metal mesh touch unit is connected to an external touch control module through a PFC circuit.

[0026] The utility model provides a display device, comprising any one of the above-mentioned touch control structures.

[0027] The utility model also provides a vehicle-mounted device, comprising any of the above-mentioned touch control structures.

[0028] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0029] The utility model provides a touch structure. Compared with the traditional Out cell structure, through structural improvement, when the user uses polarized glasses to watch the touch display panel, the screen displayed by the touch display panel can be effectively prevented from being black or having rainbow lines. Specifically:

[0030] 1) By improving the LCD structure and OLED structure in the existing touch structure, in the LCD structure, the metal grid touch unit is located between the analyzer and the polarizer. Similarly, in the OLED structure, the linear polarizer and the quarter-wave plate are located on the upper part of the metal grid touch unit. The blackening or rainbow pattern of the image displayed on the display panel can be controlled by structural improvement;

[0031] 2) The phase difference of the substrate in the metal mesh touch unit is R0 < 10nm, which can effectively solve the dispersion problem in the external touch screen structure; or the phase difference of the substrate is R0> 8000nm, for example, a commercially available super retardation film (SRF) is used, which has a thickness of about 80um, a transmittance of about 93% and a haze of less than 1%, a delay of 8400nm, excellent mechanical properties and flexibility, and a significant depolarization effect. It is usually used in vehicle-mounted touch display devices or other outdoor scenes, and its product thickness does not affect the overall quality;

[0032] 3) Use a compensation film, which is used to convert the outgoing light into circularly polarized light or elliptically polarized light. Its function is to avoid the black screen phenomenon caused by the polarization direction of the sunglasses polarizer being perpendicular to the polarization direction of the displayed outgoing light, and effectively improve the black display screen.

[0033] 4) By connecting one end of the bonding area of ​​the metal mesh touch unit to the side of the metal mesh touch unit and the other end to the touch control module through the PFC (Flexible Printed Circuit) circuit, such a structure ensures that the overall light transmission effect will not be affected when the bonding area is connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of an embodiment of a touch control structure of the present invention;

[0035] Figure 2 This is a schematic diagram of an embodiment of a touch control structure of the present invention;

[0036] Figure 3 It is a schematic diagram of the LCD structure of the existing Out cell touch sensor;

[0037] Figure 4 It is a schematic diagram of the existing Out cell touch sensor OLED structure;

[0038] Figure 5 This is a schematic diagram of the structure of the first embodiment of the metal mesh touch unit of the utility model;

[0039] Figure 6 This is a schematic diagram of the structure of the second embodiment of the metal mesh touch unit of the utility model;

[0040] Figure 7 This is a schematic diagram of the structure of the third embodiment of the metal mesh touch unit of the utility model;

[0041] Figure 8 This is a schematic diagram of the structure of the fourth embodiment of the metal mesh touch unit of the utility model;

[0042] Fig. 9 This is a schematic diagram of the structure of the fifth embodiment of the metal mesh touch unit of the utility model;

[0043] Fig.10 This is a schematic diagram of the connection structure between the metal grid touch unit and the bonding area of ​​the utility model;

[0044] Fig.11 This is a schematic diagram of the PFC connection of the bonding area of ​​the metal mesh touch unit of the utility model;

[0045] Fig.12 A schematic diagram of the structure of an embodiment of the utility model with a compensation film added;

[0046] Fig.13 This is a schematic structural diagram of another embodiment of the utility model with a compensation film added.

[0047] Wherein: 1. metal grid touch unit; 101. substrate; 102. first metal grid layer; 103. second metal grid layer; 2. first polarizing unit; 3. second polarizing unit; 4. bonding area; 5. touch control module. DETAILED DESCRIPTION

[0048] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0049] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0051] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0052] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0053] First, see Figure 3 and Figure 4 , Figure 3 and Figure 4 The touch display structure of LCD configuration and the touch display structure of OLED configuration in the current prior art are respectively displayed, wherein the touch display structure of LCD configuration includes a metal mesh touch unit 1 (Metal mesh), an analyzer, a filter, a liquid crystal layer, a TFT array, a polarizer, and a backlight source stacked in sequence, wherein the analyzer and the polarizer are both polarizers, the polarizer is used to convert natural light into polarized light, and the analyzer is used to detect the polarization state of light, which makes the light emitted from the touch panel linearly polarized light, and the linearly polarized light is then emitted through the metal mesh touch unit 1, and birefringence occurs. At this time, when the user wears polarizing glasses to watch the screen, sometimes blackening or rainbow patterns are produced due to interference.

[0054] Likewise, Figure 4 The touch display structure of the OLED configuration includes a metal mesh touch unit 1 (Metal mesh), a linear polarizer, a wave plate and an OLED stacked in sequence. The light emitted by the OLED passes through the wave plate and the linear polarizer to be emitted as linearly polarized light. The linearly polarized light then passes through the metal mesh touch unit 1 and emits a birefringence phenomenon. At this time, when the user wears a polarizing glass to watch the screen, it will also appear black or produce interference such as Fig.13 The rainbow pattern shown.

[0055] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0056] Example 1

[0057] See also Figure 1-2 , a touch structure, comprising a first polarizing unit 2, a second polarizing unit 3 and a metal mesh touch unit 1, wherein the metal mesh touch unit 1 is arranged between the first polarizing unit 2 and the second polarizing unit 3;

[0058] Alternatively, the metal mesh touch unit 1 is disposed below the first polarizing unit 2 and the second polarizing unit 3 .

[0059] The difference from the existing touch display panel structure is that, in the present application, the metal mesh touch unit 1 is arranged between the first polarizing unit 2 and the second polarizing unit 3. In the LCD structure, the polarizer is used to convert natural light into polarized light, and the analyzer is used to detect the polarization state of light, which makes the light emitted from the touch panel linearly polarized light. When the user watches the screen with polarizing glasses, blackening or rainbow patterns may sometimes appear. By changing the order in which the backlight source light enters, the light passes through the second polarizing unit 3 (polarizer)-metal mesh touch unit 1-first polarizing unit 2 (analyzer) in sequence. At this time, the linearly polarized light emitted by the first polarizing unit 2 no longer passes through the metal mesh touch unit 1, and the linearly polarized light will not undergo birefringence. Therefore, when the screen is viewed through a polarizing glass, no rainbow pattern will appear due to interference, which can effectively improve the blackening or rainbow pattern phenomenon that occurs when the screen is viewed with a polarizing glass.

[0060] Similarly, in the OLED structure of the present application, the metal mesh touch unit 1 is arranged at the bottom of the first polarizing unit 2 and the second polarizing unit 3, and the light emitted by the OLED passes through the metal mesh touch unit 1-the second polarizing unit 3 (quarter wave plate)-the first polarizing unit 2 (linear polarizer) in sequence. At this time, the linearly polarized light emitted by the first polarizing unit 2 no longer passes through the metal mesh touch unit 1, and the linearly polarized light will not undergo birefringence. Therefore, when viewing the screen through a polarizing filter, no rainbow pattern phenomenon will occur due to interference, which can effectively improve the blackening or rainbow pattern phenomenon that occurs when viewing the screen with a polarizing filter.

[0061] In some optional embodiments, see Figure 6-7 The metal mesh touch unit 1 includes a first metal mesh layer 102, a second metal mesh layer 103 and a substrate 101, wherein:

[0062] The first metal mesh layer 102 and the second metal mesh layer 103 are sequentially disposed on the upper portion of the substrate 101; or,

[0063] The first metal mesh layer 102 and the second metal mesh layer 103 are sequentially disposed at the lower portion of the substrate 101 .

[0064] In some optional embodiments, see Figure 5 The first metal mesh layer 102 and the second metal mesh layer 103 are respectively arranged on the upper and lower sides of the substrate 101.

[0065] In some optional embodiments, see Figure 8-9 The first metal mesh layer 102 is arranged on the protective film of the first polarizing unit 2 or the second polarizing unit 3 to form a first part, and the second metal mesh layer 103 is arranged on the upper part or the lower part of the substrate 101 to form a second part, and the first part and the second part are connected by an adhesive.

[0066] As a preferred embodiment of the above embodiment, the substrate 101 is directly bonded to the protective film of the adjacent polarizing unit, or the substrate 101 replaces the protective film of the adjacent polarizing unit and is directly bonded to the polarizing unit.

[0067] In some optional embodiments, the substrate 101 is a low phase difference film with a phase difference R0<10 nm. Using a low phase difference substrate 101 (R0<10) to form a metal grid touch sensor structure can effectively solve the dispersion problem in the Out Cell structure.

[0068] In some optional embodiments, the substrate 101 is a phase retardation film, and its phase difference R0>8000nm, the phase retardation film can convert the linear polarized light into circular polarized light or elliptically polarized light, and the large in-plane phase difference allows more bands of light to pass through. Therefore, when the user wears sunglasses or polarized glasses, no matter from which angle the user looks at the display screen of the touch display device, there is relatively sufficient and uniform light entering the user's eyes, avoiding the user's picture from being black or having rainbow lines.

[0069] Embodiment 2:

[0070] See also Figure 12-13 , further comprising a compensation film, wherein the compensation film, the first polarizing unit 2, the metal mesh touch unit 1 and the second polarizing unit 3 are arranged in sequence; or,

[0071] The compensation film, the first polarizing unit 2, the second polarizing unit 3 and the metal mesh touch unit 1 are arranged in sequence.

[0072] The compensation film can be called a phase difference compensation film. The phase difference compensation film is generally formed by stacking multiple layers of thin films and has specific optical properties and phase adjustment characteristics. Among them, the phase compensation film used in this embodiment converts the output light into circularly polarized light or elliptically polarized light by compensating for the phase difference.

[0073] The difference from Example 1 is that by adding a compensation film to convert the outgoing light into circularly polarized light or elliptically polarized light, the black screen phenomenon caused by the polarization direction of the sunglasses polarizer being perpendicular to the polarization direction of the displayed outgoing light can be avoided.

[0074] Embodiment 3:

[0075] See also Figure 10-11 The bonding area of ​​the metal mesh touch unit 1 extends outside the overlapping area of ​​the metal mesh touch unit 1 and the first polarizing unit 2 and the second polarizing unit 3, wherein the bonding area 4 of the metal mesh touch unit 1 is connected to the external touch control module 5 through the PFC circuit.

[0076] The difference from the existing Out cell structure is that, in this embodiment, the Bonding area 4 is connected to the metal mesh touch unit 1 at the side thereof. This connection method avoids the incident direction of light and avoids affecting the screen display. At the same time, the Bounding area of ​​the metal mesh touch unit 1 extends out of the area of ​​the polarizing unit, so that the FPC is bound outside the polarizing unit area, ensuring that the metal mesh touch unit 1 is fully fitted with the polarizing unit.

[0077] The utility model also provides a display device, comprising any one of the above touch control structures. The above touch control structure can be specifically applied to some touch control display scenarios, such as a vehicle-mounted touch control display panel.

[0078] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A touch structure, characterized in that: It includes a first polarizing unit, a second polarizing unit and a metal mesh touch unit. The metal mesh touch unit is disposed between the first polarizing unit and the second polarizing unit; or, The first polarizing unit, the second polarizing unit, and the metal mesh touch unit are arranged in sequence from top to bottom.

2. A touch control structure according to claim 1, characterized in that: The metal mesh touch unit includes a first metal mesh layer, a second metal mesh layer and a substrate, wherein: The first metal mesh layer and the second metal mesh layer are sequentially arranged on the upper part of the substrate; or, The first metal mesh layer and the second metal mesh layer are sequentially arranged at the lower part of the substrate.

3. A touch control structure according to claim 2, characterized in that: The first metal mesh layer and the second metal mesh layer are respectively arranged on the upper and lower sides of the substrate.

4. The touch control structure according to claim 2, characterized in that: The first metal mesh layer is arranged on the protective film of the first polarizing unit or the second polarizing unit to form a first part, the second metal mesh layer is arranged on the upper part or the lower part of the substrate to form a second part, and the first part and the second part are butt-jointed by an adhesive.

5. The touch control structure according to claim 2, characterized in that: The substrate is directly bonded to the protective film of the adjacent polarizing unit, or the substrate replaces the protective film of the adjacent polarizing unit and is directly bonded to the polarizing unit.

6. The touch control structure according to claim 2, characterized in that: The substrate is a low phase difference film, and its phase difference R0 is less than 10nm, or, The substrate is a phase delay film, and its phase difference R0>8000nm.

7. A touch control structure according to any one of claims 1 to 6, characterized in that: It also includes a compensation film for converting the emitted light into circularly polarized light or elliptically polarized light, wherein the compensation film, the first polarizing unit, the metal mesh touch unit and the second polarizing unit are arranged in sequence; or, The compensation film, the first polarizing unit, the second polarizing unit and the metal mesh touch unit are arranged in sequence.

8. A touch control structure according to any one of claims 1 to 6, characterized in that: The bonding area of ​​the metal mesh touch unit extends outside the overlapping area of ​​the metal mesh touch unit and the first polarizing unit and the second polarizing unit, wherein the bonding area of ​​the metal mesh touch unit is connected to an external touch control module through a PFC circuit.

9. A display device, characterized in that: It comprises the touch control structure described in any one of claims 1 to 8.

10. A vehicle-mounted device, characterized in that: It comprises the touch control structure described in any one of claims 1 to 8.

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