Touch display modules and electronic terminals

Abstract

The present invention relates to a touch display module and an electronic terminal. The touch display module includes a display screen, the display screen includes a polarizer and a phase difference film laminated to the polarizer; the phase difference film has two touch sensing layers on its surface, or the polarizer and the phase difference film each have a touch sensing layer. The present invention achieves the goal of directly forming two touch sensing layers on the phase difference film of the display screen, or directly forming two touch sensing layers on the phase difference film and the polarizer, respectively. This eliminates the need for the prior art touch display module to include an additional substrate and OCA optical adhesive, reduces the thickness of the touch display module, reduces the cost of the touch display module, avoids the risk of circuit damage caused by high bending stress in thicker touch display modules, and effectively improves the yield rate.

Description

Technical Field

[0001] The present invention relates to the field of touch display technology, and in particular to a touch display module and an electronic terminal. Background Art

[0002] Touch panels (TPs), as human-computer interaction modules, are increasingly used in electronic devices such as mobile phones, tablets, and personal computers (PCs). Because thinner electronic devices offer improved tactile feel, visual performance, and portability, thinner touch panels are becoming a growing industry trend.

[0003] The touch display module of the prior art includes a protective cover, a touch panel, and a display screen, which are sequentially bonded together using optical clear adhesive (OCA). The touch panel includes a substrate and a touch sensing layer formed on the substrate. In the manufacturing process of the touch display module, it is necessary to form a touch sensing layer on a prepared substrate to form the touch panel, and then bond the touch panel between the protective cover and the display screen to form the touch display module. Due to the presence of the additional substrate and OCA optical adhesive, the thickness and material cost of the touch display module will increase. In addition, the thicker touch display module is subject to greater bending stress, and the internal circuits of the touch display module are easily damaged. Summary of the Invention

[0004] Based on this, it is necessary to provide a touch display module and an electronic terminal to address the problems of large thickness and high cost of touch display modules in the prior art.

[0005] A touch display module includes a display screen, wherein the display screen includes a polarizer and a phase difference film laminated to the polarizer; the surface of the phase difference film is provided with two touch sensing layers, or the surface of the polarizer and the surface of the phase difference film are respectively provided with a touch sensing layer.

[0006] The above-mentioned touch display module realizes the direct formation of two touch sensing layers on the phase difference film of the display screen, or directly forming two touch sensing layers on the phase difference film and the polarizer respectively, eliminating the need for the touch display module in the prior art to add an additional substrate and OCA optical adhesive outside the display screen, reducing the thickness of the touch display module, reducing the cost of the touch display module, avoiding the risk of circuit damage caused by large bending stress in the thick touch display module, and effectively improving the yield rate.

[0007] In one embodiment, when two touch-sensing layers are provided on the surface of the retardation film, the two touch-sensing layers are sequentially provided on the same side of the retardation film, or the two touch-sensing layers are provided on opposite sides of the retardation film. In this manner, a dual-layer touch-sensing layer is formed on the retardation film, reducing the thickness of the touch display module and lowering its manufacturing cost.

[0008] In one embodiment, when the two touch sensing layers are sequentially disposed on the same side of the retardation film, the two touch sensing layers are sequentially disposed on the end surface of the retardation film closest to the polarizer. Thus, the touch sensing layer is positioned between the retardation film and the polarizer, thereby better protecting the touch electrodes of the touch sensing layer and improving touch performance.

[0009] In one embodiment, the polarizer includes a first protective layer, a second protective layer, and a substrate. The first and second protective layers are located on opposite sides of the substrate, and the second protective layer is laminated to the retardation film. When a touch-sensitive layer is provided on each of the polarizer and retardation film, the touch-sensitive layer of the polarizer is provided on the surface of the first protective layer or the surface of the second protective layer. Thus, the touch-sensitive layer is formed on the first or second protective layer, reducing the thickness of the touch display module and lowering its manufacturing cost.

[0010] In one embodiment, the touch-sensing layer of the polarizer is disposed on the surface of the first protective layer or the surface of the second protective layer, and includes any of the following: a touch-sensing layer is disposed on the end surface of the first protective layer away from the substrate; or a touch-sensing layer is disposed on the end surface of the second protective layer away from the substrate; or a touch-sensing layer is disposed on the end surface of the first protective layer close to the substrate; or a touch-sensing layer is disposed on the end surface of the second protective layer close to the substrate. In this way, the touch-sensing layer is formed on the first protective layer or the second protective layer, which reduces the thickness of the touch display module and reduces the manufacturing cost of the touch display module. When the touch-sensing layer is disposed close to the substrate, it can be better protected, thereby improving touch performance.

[0011] In one embodiment, the first and second protective layers include any one of a triacetate substrate, a polyethylene terephthalate substrate, or a cycloolefin polymer substrate. Thus, a touch sensing layer formed on the triacetate substrate, the polyethylene terephthalate substrate, or the cycloolefin polymer substrate can be obtained.

[0012] In one embodiment, the retardation film includes a 1 / 2 retardation film and a 1 / 4 retardation film. When two touch-sensing layers are provided on the surface of the retardation film, the two touch-sensing layers are provided on the 1 / 2 retardation film and the 1 / 4 retardation film, respectively. When a touch-sensing layer is provided on the surface of the polarizer and the surface of the retardation film, respectively, the touch-sensing layer of the retardation film is provided on one of the 1 / 2 retardation film and the 1 / 4 retardation film. In this way, the 1 / 2 retardation film and the 1 / 4 retardation film can reduce the reflection of ambient light and reduce the substrate used to form the touch-sensing layer, thereby reducing the thickness of the touch display module and lowering the production cost of the touch display module.

[0013] In one embodiment, the polarizer includes a substrate, a first protective layer, a second protective layer, and a first adhesive layer. The first and second protective layers are located on opposite sides of the substrate, and the first adhesive layer is located on the end face of the first protective layer away from the substrate. The retardation film includes a stacked 1 / 2 retardation film, a 1 / 4 retardation film, and a third adhesive layer. The 1 / 2 retardation film is bonded to the second protective layer, and the third adhesive layer is located on the end face of the 1 / 4 retardation film away from the 1 / 2 retardation film. When a touch sensing layer is provided on each of the surfaces of the polarizer and the retardation film, the touch sensing layer is formed on the first and third adhesive layers. In this way, the touch sensing layer is directly formed on the first and third adhesive layers, reducing the thickness of the touch display module and lowering the manufacturing cost of the touch display module.

[0014] In one embodiment, the display screen includes any one of a liquid crystal display screen, an organic light emitting diode display screen, or an electrophoretic display screen. Thus, the touch sensing layer of the liquid crystal display screen, organic light emitting diode display screen, or electrophoretic display screen is formed on a retardation film or a polarizer, effectively reducing the thickness of the touch display module and lowering the manufacturing cost of the touch display module.

[0015] In one embodiment, the touch sensing layer includes touch electrodes, and the touch electrode material includes any one or a combination of the following: indium tin oxide, zinc tin oxide, indium zinc oxide, metal mesh, conductive metal nanowires, carbon nanotubes, graphene, or an organic transparent conductive material. This allows the touch electrode material to be selected based on the actual use environment, maintaining a high yield while minimizing production costs.

[0016] In one embodiment, the touch display module includes a protective cover plate, which is attached to the end of the polarizer away from the phase difference film. In this way, the protective cover plate can isolate the display screen from the outside world, providing protection and dustproofing.

[0017] At the same time, the present invention also provides an electronic terminal including the above touch display module.

[0018] Thus, since the touch display module has a smaller thickness and a lower cost, the electronic terminal having the touch display module tends to be thinner and has a lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the touch display module according to the first embodiment of the present invention;

[0020] Figure 2 Schematic diagram of the structure of a touch display module according to a second embodiment of the present invention;

[0021] Figure 3 Schematic diagram of the structure of a touch display module according to a third embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the structure of a touch display module according to a fourth embodiment of the present invention;

[0023] Figure 5 2 is a structural diagram of a touch display module according to a fifth embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the structure of a touch display module according to a sixth embodiment of the present invention;

[0025] Figure 7 2 is a structural diagram of a touch display module according to a seventh embodiment of the present invention;

[0026] Figure 8 2 is a schematic structural diagram of a touch display module according to an eighth embodiment of the present invention;

[0027] Figure 9 FIG. 4 is a structural diagram of a touch display module according to a ninth embodiment of the present invention. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] like Figure 1 As shown, a touch display module 10 according to an embodiment of the present invention is applied to an electronic terminal. Specifically, in this embodiment, the electronic terminal is an electronic terminal such as a smartphone, a laptop computer, a tablet computer, a mobile phone, a video phone, a digital still camera, an e-book reader, a portable multimedia player (PMP), a mobile medical device, or a wearable device.

[0032] The touch display module 10 includes a protective cover 100 and a display screen 200. A touch sensing layer 221 is provided within the display screen 200. The touch sensing layer 221 includes touch electrodes. When a user touches the outer surface of the protective cover 100, the touch electrodes within the display screen 200 generate touch signals, which in turn display the content indicated by the touch signals on the display element 230 of the display screen 200.

[0033] The protective cover 100 is bonded to the display screen 200 (for example, the protective cover 100 is bonded to the display screen 200 via the first adhesive layer 214 ) to isolate the display screen 200 from the outside world, providing protection and dustproofing. The protective cover 100 can be made of glass, sapphire, polycarbonate (PC), or polymethylmethacrylate (PMMA), among others, and can be used alone or in combination. In one embodiment, when protection of the display screen 200 is not required, the protective cover 100 can be omitted.

[0034] Display screen 200 may be a liquid crystal display (LCD), an organic light-emitting diode (OLED), or an electrophoretic display (EDD). Specifically, in this embodiment, display screen 200 is an OLED. Display screen 200 includes a polarizer 210, a retardation film 220, and a display element 230, which are laminated in sequence.

[0035] The polarizer 210 is used to control the polarization direction of the light beam. Specifically, in this embodiment, the polarizer 210 includes a first protective layer 211, a second protective layer 212 and a substrate 213. The first protective layer 211 and the second protective layer 212 are respectively located on opposite sides of the substrate 213. The first protective layer 211 is bonded to the protective cover 100, and the second protective layer 212 is bonded to the phase difference film 220. Among them, the material of the substrate 213 is polyvinyl alcohol (PVA for short), which is a high molecular polymer with polarization properties. Transparent substrates (i.e., the first protective layer 211 and the second protective layer 212) formed of triacetyl cellulose (TAC for short) are bonded on both sides of the PVA. The first protective layer 211 and the second protective layer 212 can play a protective role (blocking oxygen and water) on the one hand, and can prevent the substrate 213 from shrinking on the other hand. The first protective layer 211 and the second protective layer 212 may be made of the aforementioned TAC substrate, or may be made of PET (Polythylene Terephthalate) or COP (Cyclo Olefin Polymer) or other substrates.

[0036] The phase difference film 220 is used to reduce the reflection of ambient light on the display element 230. In one embodiment, two touch sensing layers 221 are provided on the surface of the phase difference film 220, and the touch sensing layer 221 includes touch electrodes. The two touch sensing layers 221 are sequentially arranged on the surface of the same side of the phase difference film 220. Specifically, in this embodiment, the two touch sensing layers 221 are sequentially arranged on the end face of the phase difference film 220 close to the polarizer 210. In this way, the touch electrodes of the touch sensing layer 221 are located between the phase difference film 220 and the polarizer 210, so that the touch electrodes can be better protected, thereby improving the touch performance. It can be understood that in one embodiment, if Figure 2 As shown, the two touch sensing layers 221 can also be sequentially arranged on the end surface of the phase difference film 220 away from the polarizer 210. In another embodiment, as Figure 3As shown, the two touch sensing layers 221 can also be respectively provided on the two opposite sides of the phase difference film 220. The phase difference film 220 can be a 1 / 2 phase difference film or a 1 / 4 phase difference film, or a combination of a 1 / 2 phase difference film and a 1 / 4 phase difference film. In one embodiment, as Figure 9 As shown, the phase difference film 220 includes a 1 / 2 phase difference film 220a and a 1 / 4 phase difference film 220b that are bonded to each other, and two touch sensing layers 221 are respectively provided on the 1 / 2 phase difference film 220a and the 1 / 4 phase difference film 220b. The figure only takes the two touch sensing layers 221 as an example in which the two touch sensing layers 221 are respectively provided on one end of the 1 / 2 phase difference film 220a and the 1 / 4 phase difference film 220b close to the protective cover. It can be understood that in other embodiments, the specific position is not limited in any way. Among them, the material of the touch electrode of the above-mentioned touch sensing layer 221 includes but is not limited to any one of the following or a combination of multiple: indium tin oxide (ITO), zinc tin oxide (ZTO), indium zinc oxide (IZO), metal mesh, conductive metal nanowires, carbon nanotubes, graphene or organic transparent conductive materials. In one embodiment, the material of the touch electrodes is a metal mesh. Since the metal mesh is rollable and not easily broken, the display screen 200 can be made into a flexible screen or a curved screen.

[0037] In one embodiment, if Figure 4 As shown, a touch sensing layer 221 is provided on the surface of the polarizer 210 and the surface of the retardation film 220, respectively. The touch sensing layer 221 includes touch electrodes. Specifically, in this embodiment, the touch sensing layer 221 on the retardation film 220 is provided on the end surface of the retardation film 220 away from the polarizer 210 (the touch sensing layer 221 on the retardation film 220 can also be provided on the end surface of the retardation film 220 closer to the polarizer 210. The following description only uses the touch sensing layer 221 on the retardation film 220 provided on the end surface of the retardation film 220 away from the polarizer 210 as an example). When the retardation film 220 includes a 1 / 2 retardation film 220a and a 1 / 4 retardation film 220b that are laminated to each other, the touch sensing layer 221 of the retardation film 220 is provided on one of the 1 / 2 retardation film 220a and the 1 / 4 retardation film 220b. The touch sensing layer 221 on the polarizer 210 is disposed on the surface of the first protective layer 211 or the surface of the second protective layer 212. In this embodiment, the touch sensing layer 221 on the polarizer 210 is disposed on the end surface of the first protective layer 211 away from the substrate 213. In one embodiment, Figure 5 As shown, the touch sensing layer 221 on the polarizer 210 is disposed on the end surface of the first protective layer 211 close to the substrate 213. In another embodiment, as shown in FIG. Figure 6As shown, the touch sensing layer 221 on the polarizer 210 is disposed on the end surface of the second protective layer 212 away from the substrate 213. In another embodiment, as shown in FIG. Figure 7 As shown, the touch sensing layer 221 on the polarizer 210 is disposed on the end surface of the second protective layer 212 close to the substrate 213. The formation position of the touch sensing layer 221 on the polarizer 210 can be changed according to actual use needs and is not limited here.

[0038] In one embodiment, if Figure 8 As shown, the surface of the polarizer 210 is provided with two touch-sensing layers 221, each of which includes touch electrodes. Specifically, in this embodiment, the two touch-sensing layers 221 are respectively provided on the first protective layer 211 and the second protective layer 212. More specifically, in this embodiment, the two touch-sensing layers 221 are respectively provided on the end surfaces of the first protective layer 211 and the second protective layer 212 that are away from the substrate 213. It is understood that in other embodiments, the touch-sensing layers 221 may also be provided on the end surfaces of the first protective layer 211 or the second protective layer 212 that are closer to the substrate 213, and this is not limited here.

[0039] In one embodiment, please refer to Figure 1 The polarizer 210 includes a first adhesive layer 214, the display screen 200 includes a second adhesive layer 240, and the phase difference film 220 includes a third adhesive layer 223. The first protective layer 211 of the polarizer 210 is bonded to the protective cover 100 via the first adhesive layer 214, the end of the phase difference film 220 close to the polarizer 210 is bonded to the second protective layer 212 via the second adhesive layer 240, and the end of the phase difference film 220 away from the polarizer 210 is bonded to the display element 230 via the third adhesive layer 223. The materials of the first adhesive layer 214, the second adhesive layer 240, and the third adhesive layer 223 can be OCA optical adhesive or pressure sensitive adhesive (PSA). Specifically, in this embodiment, the material of the first adhesive layer 214 is OCA optical adhesive, the material of the second adhesive layer 240 is pressure sensitive adhesive, and the material of the third adhesive layer 223 is OCA optical adhesive. It should be noted that the positions and types of the first adhesive layer 214, the second adhesive layer 240, and the third adhesive layer 223 are not limited to these and can be varied based on actual usage requirements. In one embodiment, when a touch sensing layer 221 is provided on the surface of the polarizer 210 and the surface of the retardation film 220, respectively, the touch sensing layer 221 can be formed directly on the first adhesive layer 214 and the third adhesive layer 223.

[0040] The touch display module 10 of the present invention realizes that two touch sensing layers 221 are directly formed on the phase difference film 220 of the display screen 200, or two touch sensing layers 221 are directly formed on the phase difference film 220 and the polarizer 210 respectively, or two touch sensing layers 221 are directly formed on the polarizer 210. This eliminates the need for the touch display module of the prior art to additionally add a substrate (such as a PET substrate or a COP substrate) and an OCA optical adhesive process, reduces the thickness of the touch display module 10, reduces the cost of the touch display module 10, avoids the risk of circuit damage caused by large bending stress in the thick touch display module 10, and effectively improves the yield rate.

[0041] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A touch display module, characterized in that: The device comprises a display screen and a protective cover plate, wherein the display screen comprises a polarizer and a phase difference film attached to the polarizer; The protective cover is attached to the end of the polarizer away from the phase difference film; The polarizer includes a substrate, a first protective layer, a second protective layer and a first adhesive layer, wherein the first protective layer and the second protective layer are respectively located on two opposite sides of the substrate, the second protective layer is laminated to the phase difference film, and the first adhesive layer is located on the end face of the first protective layer away from the substrate; Two touch sensing layers are provided on the surface of the phase difference film, and the two touch sensing layers are sequentially provided on the surface of the same side of the phase difference film, and the two touch sensing layers are sequentially provided on the end surface of the phase difference film close to the polarizer; The phase difference film includes a stacked 1 / 2 phase difference film, a 1 / 4 phase difference film and a third adhesive layer. The 1 / 2 phase difference film is bonded to the second protective layer. The third adhesive layer is provided on the end surface of the 1 / 4 phase difference film away from the 1 / 2 phase difference film. The two touch sensing layers are respectively provided on the 1 / 2 phase difference film and the 1 / 4 phase difference film. The two touch sensing layers are respectively provided on one end of the 1 / 2 phase difference film and the 1 / 4 phase difference film close to the protective cover plate.

2. The touch display module according to claim 1, wherein: The first protective layer and the second protective layer include any one of a triacetate base material, a polyethylene terephthalate base material, and a cycloolefin polymer base material.

3. The touch display module according to claim 1, wherein: The display screen includes any one of a liquid crystal display screen, an organic light emitting display screen or an electrophoretic display screen; and / or The touch sensing layer includes touch electrodes, and the material of the touch electrodes includes any one or a combination of the following: indium tin oxide, zinc tin oxide, indium zinc oxide, metal grid, conductive metal nanowires, carbon nanotubes, graphene or organic transparent conductive materials.

4. An electronic terminal, characterized in that: It comprises the touch display module according to any one of claims 1 to 3.

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